ES2354864T3 - MEMBRANE PUMP. - Google Patents

Abstract

The invention relates to a diaphragm pump comprising a multi-part pump body that has at least three rigid plates and at least two elastic membranes placed between these plates. Said plates form at least one pump chamber and at least two blocking chambers, particularly with the geometry of a spherical segment of a spherical zone, of a cylinder or of a truncated cone, each having an inlet and outlet opening for the material to be delivered. The pump chamber and the blocking chambers, together with an inlet channel, form the connecting channels and together with an outlet channel, form a passage channel. The pump chamber and the blocking chambers are separated by the diaphragms into a product space and control space. The control spaces have control lines that are connected to a control unit. The invention is characterized in that the outer plate is provided with a stronger design whereby the control space of the pump chamber is enlarged, and an axially moving disc with an elongated rod, which is placed on one side, is inserted inside said control space.

Description

Membrane pump

The present invention relates to a pump of membrane based on patent DE-A 102 16 146, is that is, a membrane pump with at least two channels for the supply and drainage of liquids, but with a lifting volume adjustable by a head-shaped dosing device dosing, and the use of the membrane pump as a valve adjustable or as a multi-way adjustable distribution valve or valve multi component distributor.

From US-A 3 741 687 it is known a membrane pump with only two channels: an input channel and a output channel

From DE-A 102 16 146 it is known a membrane pump with a multi-component pump body and two channels consisting of at least three rigid plates and by at least two elastic membranes that extend between the plates and in which the plates form, in particular, a pumping chamber and at least two closing chambers, each having one inlet and outlet opening for the material to be transported and in which the pumping and closing chambers form - together with a channel input, connection channels and an output channel - a channel in passing, and in which the pumping chamber and the closing chambers are divide each one into a product compartment and a compartment of control and in which the control compartments comprise pilot lines connected to the control unit.

During the use of the diaphragm pump according to the DE-A 102 16 146 it has been detected that it is not always meets the accuracy requirements, particularly when substances have different densities, or also when requires an exact dosage of different volumetric flow rates using an individual supply run or whenever you want Use the diaphragm pump as a multi-way valve.

Therefore, the task is to develop a Enhanced membrane pump based on the described membrane pump on DE-A 102 16 146 that is capable of pumping small volumetric quantities per unit of time and have high short-term dosing accuracy, all with small dimensions. The pump must have a good suction behavior to be able to pump even against a high pressure so that, even when the pump head is not flooded, transport against pressure and running with a partial run and allow, at any given time and when desired, take a sample of the intended material transport. This task has been extended by the fact that in this pump is also possible serial dosing of different liquids as well as improved cleaning and at the same time it has Optimized the transport behavior by pulsations.

The solution of the task and the purpose of the present invention consists of a modular shaped pump head of electropneumatic operated lamella (according to fig. 1 or the fig. 2), respectively, which consists of several parts and so minus three rigid plates (lamellae) (201, 203, 205) and at least minus two elastic membranes (204, 202) that are between said plates and in which the plates (201, 203, 205) form at least a pumping chamber (211) and at least two closing chambers (210, 212) that particularly present the geometry of a sector spherical, a spherical zone, a cylinder or a truncated cone and a inlet opening (240) and an outlet opening (241) for the material that is intended to be transported and in which the pumping chamber (211) and the closing chambers (210, 212) form, together with the channel input (207), connection channels (208) and (209) and channel output (206), a passage channel, and in which the pumping chamber (211) and the closing chambers (210, 212) are divided, by the membranes (204, 202), in a product compartment (230, 231, 232) and a control compartment (220, 221, 222), and in which the control compartments (220, 221, 222) comprise pilot lines (119, 120, 121) connected to a control unit (100, 115), characterized by the fact that the outer plate (205) is build so that it houses the mobile disk and thus enlarges the control chamber of the pumping chamber being placed, in its inside, a disk with axial displacement (1001) with a rod extended inserted on one side (1002) to the outside of the dosing head and that can be adjusted from outside the pump (1003) thus moving the disk (1001) in the inside the control compartment, reducing or enlarging, respectively, the possible path of the membrane inside of the pumping chamber to be able to vary the volume of liquid in each material pumping stroke, and by the fact that the pump works in a partial career mode without the volume of space dead in the product compartment is altered, and by the fact that the surface of the mobile disk is slightly lower than the active surface of the pumping membrane and center distance of each adjoining inlet or the outlet of each pumping chamber or closure, respectively, is two or ten times larger than the diameter hydraulic of each inlet opening (240) or outlet (241).

In a preferred embodiment of the invention, the membrane pump comprises a control unit decentralized electropneumatic (100, 115) with generator depression for the activation of the pump head and where the distance from the center of each of the entrances and exits of the respective pumping and closing chambers is two to ten times greater than the hydraulic diameter of each inlet opening (240) or exit (241).

The membrane pump according to the invention is preferably constructed in such a way that the pumping chamber (211) and the closing chambers (210, 212) close tightly on the side of the edges by means of membranes (204, 202).

The outer plate (205) is formed such that preferably accommodate the mobile disk and the rod with the possibility of an external adjustment. This requires that the external plate be, in the In most cases, thicker and stronger than the plates (201) or (203).

The stretched elastic membrane between the plates, it tenses and relaxes pneumatically by the propulsion (control unit) so that the surface of the active membrane is deformed, in the closed operating state by the control pressure, towards the boundary wall of the chamber pumping and closing on the product side, and in the state of open or relaxed operation, due to the elasticity of the membrane material and depression to the wall delimiter of the control compartment.

Thus, the travel effort more high is compensated for by the largest deformation path of the membrane The force applied to transport movements and membrane closure, respectively, therefore, is greater that the force applied for the return of the membranes to their position initial.

Due to the preferred geometries and the effect of preferred strength, membrane loading and deformation of the Membranes are symmetrical, thus increasing dosing accuracy and the life of the membrane.

The membrane pump according to the invention, which it consists of a pump head according to the invention and a unit of decentralized control enables the transport of small volume quantities per unit of time, has a high short-term dosing accuracy with respect to the run by dosing, it demonstrates excellent suction behavior and It is capable of transporting the material against pressure even when the pump head is not flooded and also facilitates the running with a partial career at all times. Pump membrane according to the invention facilitates, in its various applications, the transport of liquids with a viscosity range between 0.001 Pas up to 10 Pas, preferably between 0.001 to 5 Pas, and particularly preferred of liquids with a viscosity of 0.001 to 2 Pas.

The mobile disk (1001) that is moved by the rotation and stroke movement in axial direction to control chamber of the pumping chamber (211) facilitates that change the stroke path of the pump membrane conveyor (204), so that the pumping can be carried out through operation with partial run. In addition, it is achieved an additional reduction of the membrane load, since, depending on the elastic material used, the deformation by the Membrane stroke path change is minor. Preferably, the mobile disk reduces the deformation path In the relaxed state.

The wall (1001) that can be moved so axial inside the chamber control compartment of pumping varies the movement of the membrane in axial direction in a range between 1% and 100% of the maximum construction travel of career. Preferably, the limit is predetermined between 10% and 100% and, particularly preferred, the limit is between 20% and 100% of the run of the race without enlarging the volume of dead space inside the pumping chamber.

According to the present invention, the surface of the mobile disk is slightly smaller than the surface of the active membrane for transport. In the present invention "slightly" means that the membrane on the surface directed towards the mobile disk in axial direction presents a 60% dimension of the surface of the active membrane for the transport, preferably a dimension of 61% to 81% and particularly preferred a dimension of 81% to 95% of the active membrane surface for transport. In this way, a large area of the elastic membrane is supported during the operation and increases dosing accuracy.

Using the rod (1002) you can adjust the mobile disk (1001) from the outside of the diaphragm pump e insert it through the outer plate (205). Displacement is effect by means of the rotary or elevation adjustment, for example, of manually, by means of a hydraulic, pneumatic or piezo, the automatic precise adjustment of the partial career The rod can be, for example, a rod threaded or a thread shaped like a cylindrical rod or rod square. The mobile disk or the rod, respectively, close tightly towards the plate (205) and outward, so that The control compartment can be loaded with pressure.

The axial adjustment of the disc inside the control chamber of the pumping chamber can be carried out, in a preferred embodiment of the invention, automatically through the rod (1002), or by remote control if install an electric motor or hydraulic servomotor or tire.

Depending on the selection of the possibility of Convenient setting for the mobile disk can be advantageous that the closing chambers also have an electrical operation, hydraulic or pneumatic

An actuator forms the automatic partial stroke of the pump membranes to obtain, in combination with a step sensor, for example, a step regulation.

The default transport capacity of the pneumatic pump can be controlled, for example, so gravimetric If capacity changes occur Default dosing, the tilt sensor transmits a signal to the monitoring regulator, and the regulator transmits a signal of control to the servomotor that is fixed in the rod of the mobile disk (1001) that adjusts the disc in the control compartment of the pump in axial direction to achieve a change in the volume of pump lift and, thus, get a correction of the transport capacity of the pump.

The mobile disk (1001) inserted in the address axial in the control compartment can have different shapes on the side of the membrane. The disk can have the shape of a disk flat cylindrical (fig. 2a), of a truncated cone (fig. 2b) or of spherical section (fig. 2c). Particularly, a disk shape adapted to the pumping chamber may have advantages considering that, in the maximum setting of the mobile disk, the input channels and connection outlet (208/209) of the pumping chamber are closed.

The mobile disk (1001) has openings and perforations (1007) in axial direction and, where appropriate, in the side separated from the membrane a concentric raised ring (1008) which prevents in case of complete return of the disk to its position Initial, the pneumatic connection does not close. The mobile disk (fig. 2c), with the rod extended on one side, is perforated in a face to facilitate direct connection to the control socket of the mobile disk

In a preferred embodiment, the pump membrane is constructed in such a way that the mobile disk (1001) has a flat or truncated cone shape on the side of the membrane or that is adapted to the pumping chamber on the product side comprising several perforations (1007).

Compared to the diaphragm pump according to the DE-A 102 16 146 patent, the membrane pump improved according to the present invention has an adjustment or a Simpler lifting volume variation, one press reduced and a more uniform transport volume flow. The use of partial stroke operation is valid for a pumping chamber with a lifting volume with more than 5 µl / stroke and up to 1,000,000 µl / run. The membrane pump according to the invention can be constructed, for the purpose of the various corrosion requirements in the chemical industry, of different resistant materials.

The installation of the control or technique for operation of the diaphragm pump according to the invention does not influence no way in the size of the pump head or in the possibility of integration in a test facility. The bomb of membrane according to the invention can be constructed in a modular manner, so that, with the corresponding additions or the replacement of modules, you can easily get an adjustment for the material It is intended to transport. The change in the capacity of Dosing can be done without the travel path of the membrane or mobile disk (1001), respectively, enlarges the dead volume on the pump head, so that the volume of Suctioned liquid can always and completely be removed from the pump head

In another preferred embodiment of the diaphragm pump and pump head, respectively, the control pressure acting on the membrane is produced by the interleaving a pressure regulator in front of the unit control in all control compartments of at least 0.1 bar higher than the predominant pressure in the outlet channel or pump head inlet, preferably, the pressure of control is at least 0.5 bar higher and particularly preferred, the control pressure is 1 bar higher than the pressure expected in the output or input channel.

The highest differential pressure between the channel outlet or inlet (206, 207) and pressure on the control side ensures that, through the membrane, the enclosure of each inlet and outlet opening in the pumping and closing chambers Be airtight.

The membranes (202, 204) consist, preferably, in an elastic material, particularly in a elastomer, silicone, Viton®, Teflon® or a rubber, particularly of a stratified material of at least two connected layers each other and with different elasticity modules.

A preferred embodiment of membranes is characterized in that it is composed of an elastic stratified material with at least two layers of material connected to each other and with different elasticity modules. Each layer joins or connects by adhesive to the other. In principle, this feature is also suitable for a diaphragm pump according to the DE-A 102 16 146.

In this way you can connect the film of Teflon® with a highly elastic rubber to increase forces return of the stratified membrane material and return to form a previously deformed membrane stratified material through the displacement of the liquid through an energy limited auxiliary (for example, by a vacuum generator) to its original state in the bounding wall.

A preferred embodiment of the membrane is characterized because elastic thin films they include, in part, cameras and that components for production of a membrane chamber consist of materials resistant to corrosion and house up to 30% of the membrane surface in contact with the product, preferably 65% and so particularly preferred 80% of the membrane surface in product contact.

The use of a membrane with cameras reduces the plastic deformation in case of loading, so that the deformation of the membrane in case of a high load will not have greater importance. The two elements of the membrane chamber shaped plate (see fig. 3) (1100, 1101) preferably have the form of disc and have, in the outer diameter, a ring (1102, 1103) concentric elevated relative to the membrane side to tighten a large part of the surface of the membranes so that, in the chamber area, are not subject to a deformation force or stretching, respectively.

Preferably, the camera elements are use with a membrane diameter of more than 10 mm up to less than 1000 mm, preferably in an area of diameter between more than 50 mm up to less than 800 mm and particularly preferably in a range of diameter of more than 100 mm to less than 500 mm.

The embodiment of the membrane pump or of the pump head, respectively, is especially advantageous when characterized by the fact that the pump membrane (204) comprises cameras (fig. 3).

When most of the surface of the membrane presents chambers, the surface on the product side (1104) of the membrane chamber component can provide a layer elastic or a film to hermetically close the channels of inlet and outlet connection of the pumping chamber (see fig. 3).

The large pumping chambers that comprise membranes with cameras may present, to compensate for the weight of the chamber elements, an axial guide. This axial guide can used as an alternative to rod operation (1002). The Axial guide can be a hollow rod (tube).

The embodiment of the membrane pump or of the pump head, respectively, is especially advantageous if several closing chambers have a membrane in common (fig. one).

A preferred embodiment of the pump membrane or pump head, respectively, is characterized by the fact that the pump head consists of at least three plates and because the pumping and closing chambers are formed by means of cavities in the plates (fig. 2).

In a construction mode particularly preferred, the membrane pump or the pump head, respectively, they consist of at least three plates and cameras pumping and closing (210, 211, 212) are formed by cavities in The intermediate plate.

A preferred embodiment of the pump membrane or pump head, respectively, is characterized for the fact that they consist of at least three plates and because the pumping and closing chambers (210, 212) are formed by cavities (210 ', 211', 212 ') on the outer plates (201, 203, 205).

In an embodiment particularly Preferred diaphragm pump or pump head, respectively, the product compartment of the pumping chamber (211) comprises at least one slot (213) that connects the apex of the cavity of the pumping chamber with the outlet opening of the pumping chamber

The dimension of the groove inside the pumping chamber corresponds to the dead space volume of The pumping chamber. Through the corresponding design of the chamber geometry (sphere diameter and height), volume of the dead space is, in relation to the volume of the chamber of pumping, extremely insignificant, less than 1%.

In a preferred embodiment, the walls of the control compartments in front of the membrane, and at least the pumping chamber, comprise a volume of cavity-shaped compensation with a large surface. This The membrane can, in case of depression, deform in the inside the control compartment, and adhere, in one case given end, to the boundary wall of the control compartment. At the same time, there is an enlargement of the compartment of corresponding product. However, never exceeds maximum deformation of the membrane, (shown as an example in fig. 1 in the product compartment of the closing chamber (212)).

Materials such as plastic membranes elastic undergo, in case of a greater load, an extension and permanent deformation. Permanent or plastic deformation has immediate consequences on dosing accuracy, particularly with regard to each dosing run. For precise dosing with membrane technology it has been verified, during the work for the present invention, that the deformation of the membrane and, consequently, the height of the Closing and pumping chambers cannot be arbitrarily high.

It has been found, surprisingly, when observing the geometries of the cavities of the plates in two dimensions which, starting from a tense and relaxed state until deformation maximum of the membrane, very limited limitations must be respected strict between the plates to facilitate a dosage of exact liquid.

In the case of the geometry of the chamber of pumping, such as a spherical section three-dimensional, the calculation of the maximum extent or deformation of the membrane is effected by changing the length between the string length and the arc length of a spherical section. From in this way, the membrane is relaxed at the height of the rope of the spherical section and loaded at the height of the arc length of the spherical section Knowing the lengths of the string and bow of the spherical section, the extent of the membrane (fig. 8) with the difference in length between the rope and the arc. Similarly, this procedure can be applied in other geometries of the closing and pumping chambers.

The maximum deformation of the active membrane for transport to the cavity on the side of the product should not exceed 20%, preferably between 0.01% and 10% and particularly preferably, the deformation must not exceed 0.01% up to 5% to obtain high membrane movement and uniform and dosing accuracy, especially the short term accuracy.

The limits of the membrane and the deformation calculated therefore determine the heights of the cameras closing and pumping as well as the product and control compartments formed by the membranes, achieving a considerable improvement in The dosing accuracy of the diaphragm pump according to the invention compared to diaphragm pumps already known.

The compensation volume describes the space towards which the membrane deforms in case of depression. If he compensation volume is enlarged and features an adjustable disc (1001), the volume of compensation for axial displacement of the mobile disk (1001) will have no effect on the volume in the product side of the pumping chamber.

Normally, the product compartments of the closing chambers (210, 212) are constructed smaller than the product compartment of the pumping chamber (211).

In an embodiment particularly Preferred diaphragm pump or pump head, respectively, the volume of the closing chamber reaches between the 5% and 50% of the volume of the pumping chamber on the side of the product, preferably from 5% to 30% and so particularly preferred from 5% to 20%. At first, This feature is also suitable for a membrane pump according to DE-A 102 16 146.

The distance between the centers of each entrance and Neighboring output of each pumping and closing chamber is two to ten times the largest hydraulic diameter of each inlet opening (240) and exit (241), preferably, the distance between centers is two to five times and particularly preferred, two to four times, especially preferring three four times

The defined distance between the centers is a Very significant functional measurement of the cameras. On it depends the hermetic closing of the channels and openings of entrance and exit and increase the transport that can be reproduced of substances soda and liquids and the degree of possibility of reducing dimensions.

The connection channels (208, 209) between the pumping chamber and closing chambers are formed, in a form of preferred embodiment, straight and have a relationship between the length of the channel with each hydraulic diameter of the 0.5 to 20 channels, preferably 0.5 to 10 and so particularly preferred between 0.5 and 5. In one embodiment preferred, the cross section of the channels that feed the pumping chamber is larger than the conveyor channels towards the outlet of the membrane pump according to the invention.

Another preferred embodiment of the pump membrane or pump head, respectively, is characterized due to the fact that connection channels and partial sectors of the input and output channel are at an angle to each other, the angle α in a range of +/- 20 to 70 degrees, preferably in a range of +/- 30 to 60 degrees (fig. 3b). He angle α is measured from the apex of the location plus deep from each chamber to the corresponding connection channel or to the input or output channel, respectively (fig. 3b).

The channels and channel sectors that have a angle to each other reduce current losses during the process of suction and transport. A reduction in pressure loss It is especially advantageous because the current processes of the diaphragm pump or pump head according to the invention produced by variable changes in pressure and vacuum. The channels oblique connection and input and output channels reduce the shear that occurs during the transport of material, from so that biological and medical quality substances sensitive to Shear can be dosed or transported carefully. In principle, this feature is also suitable for a pump diaphragm / pump head according to DE-A 102 16 146.

The small volume of dead space between pumping and closing chambers improves the suction capacity of the diaphragm pump or pump head, respectively, and prevents deposits in the dosing head.

Another embodiment particularly Preferred pump diaphragm / pump head is characterized by the fact that the pumphead consists of at least three plates of which at least the outer plate is temperable. In In principle, this feature is also suitable for a pump diaphragm / pump head according to DE-A 102 16 146.

Plate temperature equalization exterior is achieved by thermostatization or by a electric heating with a cooling device separated.

The present invention also relates in a manner preferred to a diaphragm pump with adjustable valves and a decentralized control unit characterized by the fact that at the pump head, in the direction of the liquid passage, the channel input with the closing chamber and the connection channel already crossed have a larger hydraulic cross section with the pumping chamber with the conveyor connection channel that with The next closing chamber and exit channel.

The present invention relates in a manner particularly preferred to a diaphragm pump with valves adjustable and decentralized control unit characterized by the fact that the volume in the pump head of the pumping chamber (211) is in the range between 0.005 ml and 1000 ml, preferably between 0.01 ml and 100 ml and particularly preferred the volume of the pumping chamber is between 0.1 ml and less than 10 ml.

The present invention relates in a manner especially preferred to a diaphragm pump with valves adjustable and decentralized control unit characterized by the fact that the volume of the dead space of the compartment of product in the pump head of the pumping chamber (211) is is below 20%, preferably below 10% and particularly preferably below 5% of the volume of The pumping chamber.

A capacity increase is facilitated through of, for example, two pump heads with adjustable valves and one control unit comprising three plates with cavities in the plate separator planes with input and output channels common as well as square connection channels between cameras pumping and closing with a specially compact construction insert, in the medium plate, a pumping chamber (303, 303 ') into each side and at least two closing chambers (301, 305) and where the inlet channel flows, in the direction of suction passage, in a transverse channel that connects the two closing chambers (301, 301 ') and where, in the outbound transport direction, a channel transverse also connects to two closing chambers (305, 305 ') and where a material to be transported can exit through the channel of pump head output that regulates, through control decentralized, the operation of all pumping chambers and closing thus achieving the function of a double diaphragm pump by means of the adjustable valves (fig. 3a).

The membranes of the double diaphragm pump are alternate so that the pulsation of the liquid flow is compensated Almost completely.

The closing chambers assigned to their corresponding pumping chambers must alternate over time during the control process to divide the pulsations by the half. All this requires a broader control process.

The three plates of the membrane pump, according to fig. 3a, they are connected to each other detachably to facilitate cleaning and repair.

The double diaphragm pump can be equipped, given the case, so that at least one pumping chamber has a mobile disk for partial run operation.

Another preferred embodiment of the pump membrane is characterized by the fact that the pump consists of at least three plates and because the intermediate plate (fig. 4 or 4a) it has at least one pumping chamber and because each chamber of pumping is assigned at least three more closing chambers small and because each closing chamber has a channel of connection to the pumping chamber as well as an input channel and outlet for the supply and drainage of at least one liquid and because all cameras can be controlled by a unit of decentralized control, separately.

A membrane pump consisting of a chamber pumping and at least three assigned closing chambers facilitates sequential or alternate transport of at least two liquids different. In this way two substances can be supplied different by process, with the deviation factor of the substances to be transported, for example, the same or different. He Deviation factor can be adjusted with the control unit.

The advantages for the operator with a pump this type is that the dosing unit can transport several substances with a desired relationship in a single process and also with a slight investment and installation effort as well as with a minimum spatial requirement. The use of the membrane pump according to the invention it is especially advantageous in applications pharmaceuticals with small amounts of dead space and with the possibility of sterilizing the technical components used.

In an alternative of one embodiment, the diaphragm pump or the pump head according to the invention is used as a transport or extraction device. In this case, the diaphragm pump or pump head according to the invention are suitable for sampling liquids or gases from equipment closed.

Fig. 7 shows, as an example, a pump circuit for sampling and preparation of samples. In fig. 4, 4a (400) combine two membrane pumps (700, 700 ') with a mixing chamber (701) to include all functional parts in the three pump plates but enlarged. The Membrane pumps have a pumping chamber (702, 702 ') and each pumping chamber features four closing chambers (703, 704, 705, 706 and 703 ', 704', 705 ', 706') The closing chambers are assigned the respective input and output channels (marked in fig. 7 with flow direction arrows). Fig. 7 shows all components needed for automated sampling with the following preparation and evacuation of the sample for a device of analysis. The control unit for the individual camera operation or illustration in section of the three plates.

In fig. 7 you can see that the sample of substance can be suctioned when the inlet channel (707) and the Output channel (708) are connected to a reactor. The pump (700) is able to pump continuously and through the channel of inlet (707), suction valve (704), pumping chamber (702), the pressure valve (705) and the outlet channel (708), a amount of substance from the reactor vessel. In a moment By default, the control changes, for example, so that the valve pressure (705) close and open the valve (706) to transmit, by the known volume of the pumping chamber, an amount of predetermined substance through the valve outlet channel (706) to the mixing chamber (701). As soon as the sample is transmitted, the pump (700 ') starts a pumping circuit to the mixing chamber At the same time, the valve inlet channel (704 ') and the valve outlet channel (705 ') are connected to the mixing chamber The pump (700) can, simultaneously with the mixing chamber pumping circuit started, transport, to through the inlet channel (709) and the valve (703), a solvent additional to the mixing chamber that would mix there with the substance sample while the valve (704) is closed. After the mixing process by the pump (700 '), the sample of Diluted substance can be transported to an analysis device. During this process, the valve (705 ') closes and the valve (706 ') opens. Due to the sum of all pumping runs to feed the mixing chamber, the prepared sample can come out through the output channel (710) and analyzed without the number of Careers change. In addition, the input channel (709) extends to the valve (703 '), so that a second pump can be washed with a solvent after sample transport when connect the corresponding valves.

The transport and intake device has a Very small dead space volume.

This small dead space volume is necessary so that the result of the analysis is not wrong by the deposit and aging of extracted substances, so that product channels are not clogged and to ensure high operation availability

The transport device according to the invention it allows an exact sampling, as well as a transport of liquids, gases or pressure gases liquefied volumetric comfortable for the operator. All this is especially advantageous because the volume Pump head lift can be adapted very easily to the operational requirements, particularly when the cameras of pumping have an adjustable disc for running operation partial.

The diaphragm pump / the device transport according to the invention operate by a control unit decentralized electropneumatics that has enough possibilities connection to control all pumping and closing chambers that are necessary.

The combination of at least one camera pumping with their respective closing chambers and chambers of storage, mixing and separation, as well as the use of sensors according to each application it offers the possibility of generating units Small and compact functional to measure, treat, prepare and analyze liquid or gaseous substances according to their features. Functional units have dimensions reduced and can be integrated into the analysis and medical devices no problem. It is especially advantageous that they only appear small volumes of dead space and only processed small amounts of substances

However, a control unit decentralized electro-pneumatic like the one in fig. 1 offers a simultaneous operation of several pump heads. This operation of several pump heads at once with a single control unit facilitates the economical use of the pump membrane / of the transport device according to the invention in installations and filling devices. The invention relates, therefore, also to installations or filling devices when they comprise the membrane pump according to the invention.

In addition, an electropneumatic control unit Decentralized facilitates sequencing of the heads individual pump to limit, in parallel operation of several pumps, the pulsation of them.

The diaphragm pump with the control unit decentralized electro-pneumatic and adjustable disk in the control chamber of the pumping chamber also facilitates a economic use with very low investment costs. All of it is particularly confirms when the objectives of the application change and require transport flows of different volumes that cannot be carried out with a single type of pump head. In In the case of variable material transport flows, you should only change the pump head, without changing the appliance control. The change of the pump head is achieved by disconnecting the pneumatic pilot lines.

Advantageously, the control for pumping the membrane pump is performed in such a way that the stroke of transport consists of at least four control steps individual in sequence and that each of the control steps be separated from the next control step by an element of constant and variable time that is sandwiched or allocated to be able to vary the transport or dosing capacity of the pump by Change at least one element of time.

The time elements that are sandwiched between the control steps ensure that the partial steps of the Pneumatically initiated pumping elevation be accurate and carry out completely and to ensure that each step is reproducible. The synchronous change of all time elements for the regulation of the material transport capacity allows Simple use and easy handling.

The time elements T of the control reach, preferably, 0.001 seconds up to 100 seconds, the range preferred is between 0.03 seconds and 30 seconds and so particularly preferred the time element is between 0.03 seconds and 10 seconds.

The elements of time ensure that the signals fast electronic control (additional time for signal) no prematurely interrupt pneumatic work processes slower for the orientation of the membranes, and, for consequently, the displacement processes on the product side of the membrane. Especially when it comes to transporting substances with a viscosity of between 0.1 mPas to 5000 mPas, the processes transport dynamics require more time than the signals from the control that occur electronically.

The dosage cycle consists, preferably, in at least four control steps and has for at least two different time elements of which you can only vary one for use in the regulation of the pumping cycle.

To optimize the pumping cycle time of the membrane pump according to the invention, the pneumatic processes of open and close membranes can include a time element Smaller adjustable inside the closing chambers and use an adjustable time element to turn ON / OFF the larger intermediate pumping chamber.

The different elements of time result especially advantageous when the volume of the closing chambers is less than the volume of the pumping chamber.

Work with different time elements It is especially advantageous when control is taken into account electro-pneumatic and variable pneumatic conditions on the line pilot and diaphragm pump control compartments between a state of depression (vacuum) and a state of pressure loss for the opening process and a high pressure for the process of closing of the chambers, and to increase the capacity of the pump.

Each element of time is, in a way of particularly preferred operation, larger than time switching required between the respective multi-way valves electro-pneumatic inside the control unit.

In a preferred embodiment of the control, the respective time element for the membranes of the Closing chambers is 0.01 to 0.15 seconds, preferably between 0.01 to 0.075 seconds and particularly preferably between 0.01 to 0.05 seconds.

At least two diaphragm pumps are connected in parallel to the electronic control units and electro-pneumatic

Through the electropneumatic control unit several diaphragm pumps can be controlled simultaneously to that the pumps that comprise pumping chambers of different sizes can simultaneously dose different substances in different quantities.

The thickness of the elastic membrane is, preferably, greater than 0.1 mm and less than 5 mm, the height of the pumping chamber and closing in the area of the apex of the chamber (with more extension above the membrane) is less than ten times the membrane thickness, preferably less than five times the used membrane thickness.

The concave cavities in the plates can present different geometric shapes, such as the shape of cylinder, spherical or cone sector.

A variant of the membrane pump or the pump head, respectively, preferably consists of a Pneumatically controlled pumping chamber in combination with two magnetic valves as closing chambers.

The membranes used in the membrane pump or pump head, respectively, preferably have a diameter larger than the diameter that is formed by chambers in the separation plane and especially preferred, the membrane diameter is at least 20% more big.

In another alternative embodiment Preferred metal membranes are used as pumping membranes that are inserted or inseparably linked with one of the plates, particularly with the outer plate, by welding.

In another special embodiment it is placed an antipulsador in the direction of flow of the product behind the closing chamber on the pressure side, particularly on the area of the outlet channel of the diaphragm pump or the head of bomb.

In another special embodiment, the pump diaphragm or pump head have a discharge valve spring-loaded to generate a product circuit in the inside of the pump head. If the control pressure connected is higher than the desired pump pressure, you can create a possibility of relaxation on the pressure side of the pump towards the suction side of the pump.

In another embodiment especially preferred, the three rigid plates contain at least two pump units consisting of two pumping chambers with their respective closing chambers to form a set of pumps in parallel.

The object of the invention is also the creation of a bomb set comprising two or more bombs of membrane or double membrane, where the membrane pumps according to the Invention they have a common control unit.

A pump set is preferred in which the pump heads comprise at least one continuous common plate with the possibility of disconnection.

In a preferred embodiment, the The present invention relates to a membrane pump that is used as an adjustable multipath membrane valve consisting of three plates, characterized by the fact that a distribution chamber with an input channel is connected by a connection channel with an interleaved adjustable valve and at least one chamber of closing with an output channel and because the cameras present cavities of the same size and can be controlled separately to that are open, for the transfer of a material, at least two chambers and the valve interspersed at the same time and because all the cameras must be operated by a control unit Decentralized electropneumatics with time control.

If the distribution occurs sequentially and through several output channels, a pumping chamber and distribution would be more convenient to be able to transport the quantity of liquid to be transported with the respective runs of bomb.

The membrane pump according to the invention is especially suitable for uniform distribution of liquids and gases to a large number of consumers as multipath membrane valve since it has a very compact construction form, spaces minimum dead and very short change times to change it from the OPEN position to the CLOSED position.

The membrane pump according to the invention can be used as a multi-way distributor valve and as a pump multi-way distributor to transport more than two liquids different sequentially with several sampling sites. Thus, for example, at least two closing chambers are connected to different supplies of liquids through which they can be distributed, through the central distributor chamber (pumping chamber), to several and at least more than two closing chambers with their channels corresponding output. In this case, three cameras are opened to the sequential transfer of liquid. In a state of rest, so at least two chambers of the multi-way distributor valve are closed (fig. 6a). The distribution of the liquid can lead to out by pump control or, alternatively, with a timed distributor.

If the membrane pump according to the invention is used as a multi-way distribution valve for distribution of at least two different liquids to several consumers, It is also possible to talk about supply closing chambers and Conveyors

This ensures that there is, in state at rest, at least one security lock between the various separate supply channels and various reception channels separated.

The diaphragm pump, respectively in case of use a diaphragm pump as a multi-way distributor valve or As a multi-way valve, you can start the membranes from the OPEN to CLOSED position and the other way around pneumatic, electric or by means of a hydraulic liquid.

With the membrane pump according to the invention, it is that is, with an adjustable suction and pressure valve and a chamber closing on the side of the suction and another on the side of the pressure, can be transported, depending on the size of the device, small volume streams of, for example, 1 µl / stroke and also volume streams to reach an area of ml per stroke of reproducible form The individual construction between the unit of pump or pump head, respectively, and the control unit Electro-pneumatic is especially advantageous. In this way, the space requirement for a transport apparatus and continuous dosing in a reduced test facility Dimensions for study work is relatively small. This Pump principle works without mechanical transmission and the components necessary for the pump head have no function dynamics, except for the membrane guide in the area of the closing and pumping chamber. Therefore, even for a design of Small dimensions of the pump components are not necessary A high precision manufacturing. There are no mechanical effects counterproductive due to lack of mechanically mobile parts and manufacturing costs are quite low for this head of membrane pump that works reproducibly. The bomb so you only need a supply of power and compressed air to to be able to function; said supply is found, for example, in any laboratory

The application of the membrane pump is especially advantageous for the dosage of quantities of very small liquid substances, whose volume for each run of pump is significantly below drip size specified. Due to the rapid application of the energy of pneumatic transport on the control side of the membrane of transport of the pumping chamber or chamber membranes of closing, the volume of product sucked into the pumping chamber is launched very strongly from the compartments of camera and output channel products. Therefore not no droplet forms at the outlet part of the pump. This form, the dosage of small amounts of liquid in a reaction mixture is not temporarily delayed and a shortened path synchronized with the dosage.

The dosage of small amounts of substances against pressure is easy because the membranes of the Closing chambers and pumping chamber are elastic and why the input and output product channels are closed so Gas-impermeable in the CLOSED position of the chambers, of so that no material recedes through the gas phase of a pressure vessel connected by the outlet side of the head of pump to the inlet side of the pump interrupting the suction under normal pressure In addition, it is possible to dose very small liquid in a process installation evacuation.

Another advantage over the state of the art is which, due to the small dead space and the closing chambers and tightly closed pumping a product can be supplied to sensitive dose without a high retention time or A remix of the product.

In addition, there are many advantages over the technique of microstructures. Due to the large dimensions of the channel in comparison with the dosing volume, the pump is quite Immune against contamination. Virtually no disturbance caused by product contamination, which would notice for a greater dosage error or for a breakdown of the pump, thanks to the large product channels. The Product contamination can be removed during dosage through the product channels relatively big.

The volume of dead space extremely small ensures good suction behavior and dosage fast and reproducible, particularly in applications with new pharmaceutical materials that, in an immature evolutionary state, are they present rather in small quantities. There are even more advantages in Medical and diagnostic technology applications.

It is very easy to adjust small liquid flows. There is the possibility of changing the lift volume drastically using the mobile disk and also carry out a fine adjustment on the time axis using the time element interspersed to control. In this way, they can be changed without the control, volume flows.

The lamella-shaped structure of the pump membrane with adjustable integrated valves can be built as a double or multi-diaphragm pump for, due to pumping principle, make the flow of pulsation dosing.

Other variants of construction for stationary or mobile use of the pump membrane according to the invention, if the pumping membrane and the valves adjustable are operated directly and electrically (with a voltage supply, for example, 6 or 12 volts). Supply electrical control, therefore, occurs, in case of a mobile use, directly through a battery or a battery of fuel to keep the control unit running for a long time. The power supply to operate the membrane pump according to the invention also makes it possible to use it in medical technology, to, for example, guarantee a supply continuous medication while the person receiving it can keep moving.

Other mobile use of the diaphragm pump according to the invention with a pneumatically operated work membrane for transporting liquid substances is achieved through a cell of compressed air with two portable cameras that can be, by reasons of weight, of a plastic material. The diaphragm pump according to the invention whose pump and valve chambers have a volume of Small control compartment can work, through a chamber with compressed air cell, for a long time with air compressed so that the second chamber of the compressed air cell can be used, for example, for the storage of a material liquid that should come out. The membrane pump according to the invention is very useful for mobile uses, for example, for the distribution of insecticides in difficult terrain.

The operator enjoys other advantages of use because the consumable parts that are in contact with the product they can be changed easily and with few costs of investment.

The invention is described in detail with the help of your illustrative figures.

Fig. 1 shows a schematic structure of a lamella-shaped membrane pump and with its corresponding electro-pneumatic control unit and a control programmable electronic as well as with the connection ducts;

Fig. 2 shows a sectional view of a pump head with an externally variable wall in the control chamber of the pumping chamber;

Figs. 2a, 2b, 2c show different construction contours of the control compartment wall variable (mobile disk);

Fig. 3 shows a pump membrane with cameras;

Fig. 3rd shows a sectional view in the that the intermediate plate has two pumping chambers with their respective closing chambers and in which the external plates have a wall of variable control compartment;

Fig. 3b shows a pump head schematic with transverse channels;

Figs. 4, 4a show an intermediate plate of a membrane pump head with several closing chambers and with several input and output channels;

Fig. 4b schematically shows a head Membrane pump with a central pumping chamber and several closing chambers with their respective input channels and exit.

Fig. 5 shows a sectional view of a multi-way distributor valve;

Fig. 6 shows a schematic view of a multi-way distributor valve;

Fig. 6a schematically shows a valve distributor with several components;

Fig. 7 shows a sampling system integrated with two membrane pumps;

Fig. 8 schematically shows a two-dimensional surface of a spherical sector in different deformation states of the membrane.

Examples

Example one

Fig. 1 shows a membrane pump with a pump head (200) in cross section with its corresponding control (100) and housing, as well as with the pneumatic distributor (115). The pump head according to fig. 1 comprises a mobile disk (1001) with a rod fixed unilaterally to operate, from the outside, the manual adjustment of the disk in axial direction. He body houses the electronic components and an electrical control that It can be programmed freely. A power cord, which is not shown in the figure, serves to supply current to the Electronic components. The body comprises a screen (101) with a switch (102) on and off and several keys of functions (103 to 109) with which you can visually observe the necessary parameters for the pumping process and save them. He electronic control (100) facilitates different variants of modes operation so that the pump can change by key (103) to continuous operation and using key (104) to discontinuous operation Particularly, the operation discontinuous pump can be adjusted by a number preset pumping runs and save with the key (105) in the control. The key (106) serves to reduce the parameters determined and the key (107) is used to raise the parameters variables that can also be saved with the key (105) as new defined parameters of the membrane pump in the control of the same. In continuous operation you can change the temporary constants using the keys (106, 107). The key (108) allows selection between internal or external control of, by For example, an external process control system. The head of pump (200) starts its work when the button (109) is pressed, when key (109) is pressed again, the operation stops. The programmable control electronics command, at the beginning of the dosing and using an electrical connection cable (110), digital signals to electropneumatic multi-way valves (111, 112, 113, 114) that switch from their OPEN to CLOSED position and vice versa (table 1). Electropneumatic multi-way valves (111 a 114) are mounted on a pneumatic distributor block (115). The block Distributor comprises two supply channels (116, 117). He supply channel (116) connects directly to the supply of compressed air and the distribution channel (117) is connected by a conduit to the supply of depression. Depression is generated with the help of a vacuum generator (118) installed in the branch, which is an injector that receives compressed air from the valve (114) from the moment the electric control is switched on. In the compact construction, the distributor block (115) is located, together with the electropneumatic multi-way valves and the generator depression (118), in the same body as the control (100), so that supply the supply channel (116) with compressed air is achieved by coupling tube (116 ') and the head of pump using the tube couplings (119 ', 120', 121 '). In the fig. 1 electronic components are not shown freely programmed, the diodes for the display screen of functions, the power outlet or the electric stage.

The freely programmable pump control Pneumatically operated diaphragm with pump head (200) Switch to multipath electropneumatic valves (111 to 114) and conveys the pneumatic pressure (pressure channel) of the block distributor (115) or vacuum in the distributor channel (117) (channel vacuum) through the control tubes (capillaries or tubes flexible) (119, 120, 121) by control compartments tires (pneumatic compartments) (220, 221, 222) to the head pump (200).

The valve (111) is connected through the conduit control (119) with suction valve (block chamber bottom (210)) of the pump head (200). Similarly it connect the other valve (112) (upper closing chamber (212)) and the valve (113) with the pump chamber (211) of the pump head (200). The valve (114) supplies the vacuum generator continuously with compressed air and connects as soon as the electronics are connected to the outlet.

The diaphragm pump head (200) consists in the three partial plates (201, 203, 205) and includes some elastic membranes (202, 204) that are capable of deforming in the area of the pumping chamber (211) and the closing chambers (210, 212) pneumatically. The membranes (202, 204) are a little more smaller than the plates (201, 203, 205) to ensure a good sealed against the atmosphere. The plate (203) has formed cavities by the pumping and closing chambers (210, 211, 212) and the volume Compensation of the closing chambers (210, 212) are included on the plate (201). The pumping chamber (211) is included, with a small part of the compensation volume, on the plate (205) and, with a large part of the pumping volume, in the intermediate plate (203).

With closing chamber (210), for example, called the suction valve of the pumping head. In this sense, the pumping chamber (211) is the transport chamber and the closing chamber (212) is the adjustable pressure valve of the pump head

The membranes (202, 204) separate the chambers of pumping and closing in control compartments (220, 221, 222) and product compartments (230, 231, 232).

The pumping and closing chambers (210, 211, 212) have the shape of spherical sections in one of the halves and of cylinder in the disc that is in front. Intermediate plate (203) has a suction channel (207) and an output channel (206). Both channels (206, 207) are extended with a welded capillary. The channels (209, 208) connect the product compartments (230, 231, 232) of the chambers (210, 211, 212).

The pumping chamber (211) has a groove (213) which serves as a connection to the geometrically deepest point of the cavity in the plate to the outlet opening or the channel of connection (209), respectively. It is also evident that between input channel (208) and the end of the output channel (209) with the connection slot (213) there is still a sufficient distance as to close the openings of the product compartment of the pumping chamber with the membrane (204).

The pump head (200), in this figure, is found in control step 4 (see table 1). In the area of the closing chamber (210) (adjustable suction valve) the membrane (202) is driven, on the side of the control compartment (220), with pressure for the membrane (202) to close the suction channel (207) at the input (240) (fig. 2) and the connection channel (208) in the exit (241) (fig. 2). In the area of the pumping chamber (211) (transport chamber), the corresponding control compartment (221) is driven by vacuum so that the membrane area of Active transport adhere to the disk (1001) and open the channel input and output connection (208, 209). The closing chamber (212) it is driven, on the control side, also by a vacuum to that the connection channel (209) and the output channel (206) are open to be able to delete, in the next step 5 (see table 1), the volume of the liquid in the pumping chamber. As you can see, the corresponding membrane movements extend throughout the cavity height In fig. 1 screws not shown necessary for fixing detachable plates and pressure simultaneous membranes introduced.

Table 1 below shows the order of the programmable control steps and valve positions (111 to 114). The digital signal "1" means "waiting for compressed air "(the result: the membrane adheres to the plate (203) and closes) and the signal "0" "waiting for vacuum" (the membrane rises inside the control compartment and opens). As soon as the electronic control receives electrical voltage and is switched on by means of the key (102), the programmed control switches to the valves (111 to 114) in a starting and basic position predefined Control of the complete pump lift it consists in this case, for example, in individual steps. When interrupts or terminates the pumping procedure, the control returns to Your initial or normal position.

TABLE 1

one

In each control process each control step 1-5 has a time element programmed variable (not shown in table 1) so that the control steps individual occur one after another and so that they are not influenced each other and finish completely. Switching times of the electro-pneumatic valves are larger and therefore considerably slower than the time required for the transmission of Digital signals The function of the pump according to the cycle of control 1-5 (see table 1) is reproducible and carried out through the elements of time interspersed.

Example 2

Fig. 2 is a pumping head (200) that consists of the plates (201, 203, 205) shown in a view in section. The elastic membranes (202, 204) can be observed extended in the planes of separation of the plates, and the cameras of closing and pumping with their corresponding cavities in the plate intermediate and exterior. The outer plate (205) is thicker for that the control compartment (221) is enlarged above its corresponding compensation volume. Control compartment expands further around a cylindrical cavity (1000) smaller and around a threaded cavity that comes out towards the outside. In the control compartment, the seated disc (1001) is installed with a unilateral cylinder, where a threaded rod (1002) inserted by screwing on the plate outside getting, in this way, that the minimum rotation of the knurled outer nut (1003) fixed on the threaded rod (1002) produce the axial movement or displacement of the disk (1001) in the inside the control compartment. The threaded rod sits and is detachably fixed by means of two pins (1004) in the disk receiving cylinder. In the disk cylinder in the inside the control compartment a tight seal is placed (1005) to seal the control compartment driven by the pneumatic pressure outwards. The disk (1001) comprises several perforations (1007) and a concentrically raised ring (1008) to facilitate a pressure pulse throughout the compartment of control and to avoid the closing of the perforation (1006) to return the disc to its initial position. Air supply compressed and the impulse for depression is achieved by laterally displaced perforation (1006). In fig. 2, the disk Adjustable has a spherical section contour and adapts, consequently, to the contour of the cavity on the side of processing

If the threaded rod comprises, for example, a fine thread, the disc (1001) already moves after a small manual rotation of knurled nut (1003) axially and the membrane path, which at the same time determines the volume of liquid to transport, change.

Figs. 2a and 2b show other variants of realization, especially different contours of the mobile disk. He disk outline (1001 ') on the membrane side of fig. 2nd is flat, the outline of the disk (1001 '') in fig. 2b is a cone truncated. In addition, the two figures show that the disk with the unilateral cylinder and directly connected threaded rod must manufactured to reduce, to the maximum possible, the number of components, costs and installation work.

In fig. 2c another form of realization of the mobile disk (1001 '' ') in which the contour of the disk adapts to the shape of the pumping chamber. The disc It has, on one side, a perforation to connect the tube control directly to the disk, thus avoiding an outlet of energy (1006) on the plate (205).

Example 3

Figure 3 shows, by way of example, a subdivision into pump membrane chambers (204) in section. In the upper part of the figure shows a membrane with cameras (204) in non-operational state, while at the bottom of the figure pressure has been applied to the control compartment (221) of the membrane (204 ') until the deformation of the membrane is reached. In addition, it is seen that the membrane extends between the plates (203, 205) and that the plate (203) includes parts of the connection channels (208, 209). The pump membrane extends, on the outside, between the plates, and is open in the center to be able to fix the chamber elements (1100, 1101) on both sides. The chamber elements show, towards the elastic membrane, a ring elevated concentric rounded (1102, 1103) to prevent, during the threading of the chamber elements, the enclosed surface of the membrane is loaded by force.

It is advantageous that the contour of the element of chamber (1104) on the processing side suits the contour of the cavity so that the volume of dead space of the chamber of Bomb don't get too big. If the camera element on the side of the product receives or is coated with an elastic film (1005), the connection channels can be closed tightly during the state of membrane loading. As seen in fig. 3 doesn't matter the degree of plastic deformation of an elastomer because the orientation should be considered as a function of the diameter of the membrane. Thanks to the camera elements it is possible to use also membrane materials that, due to their high degree of permanent deformation, would not be appropriate in other forms of realization.

Fig. 3b schematically shows a pump of Consistent membrane consists of three plates (201, 203, 205). Particularly, the figure illustrates that the connection channels (208, 209) and the supply and output channel sectors (207, 206) are at an angle? for, in case of changing the flow states very quickly, there is no loss of Pressure.

Example 4

Fig. 3rd shows a double diaphragm pump with adjustable valves consisting of three plates and in which all pumping and closing chambers are installed on the plate intermediate. As you can see, the input channel (300) has a form of T and connect the closing chamber (301, 301 ') left to right on the suction side so that both closing chambers share a common input channel From each closing chamber there is a channel of angled connection (302, 302 ') to the pumping chamber (303, 303 '). In an almost reflected image of the liquid inlet area is the secondary area of liquid outlet of the pump double membrane. The connection channels (304, 304 ') connect the pumping chambers (303, 303 ') with closing chambers (305, 305') on the side of the exit, and the closing chambers on the side of the output with one output channel (306) in common. In this example, describes a double diaphragm pump with a partial passage channel internal. The double diaphragm pump has been equipped, in this example, with a mobile disk (1001) for possible run operation partial. The connection elements are not shown in Figure 3a detachable from the plates, and the pump head is not in work position. The flow direction of the membrane pump Double is indicated by arrows.

Example 5

In fig. 4th and 4th perspective is shown front of the intermediate plate (plate 400) on which they are assigned four closing chambers (1200, 1201, 1202, 1203) to a camera pumping (1205). The chambers are formed by cavities with spherical section shape (spherical cap). Each closing chamber presents a connection channel (1206) to the pumping chamber central (1205), in addition, two of the closing chambers have a separate input channel (1207, 1208) and the other two cameras of Closure present a separate output channel (1209, 1210). In this embodiment two different substances can be transported sequentially or alternately with the pump head. In a Application for pharmaceutical purposes, the second input channel could be used to pump a cleaning liquid to start a washing procedure An alternative application is offered for the second input channel if a steam connection is used to be able, at any time, to initiate a process of sterilization. In this way, the input channel (1207) could connect to a supply tube of a substance to be dosed. The substance arrives during the suction process to the pumping chamber (1205) to then be propelled through the closing chamber (1202) towards the exit channel (1209). The sterilization process requires a steam connection in the inlet channel (1208). He steam could reach the pumping chamber (1205) through the closing chamber (1201) to then arrive, through a channel of connection to the closing chamber (1203) and the output channel (1210). In the area of application of the pharmaceutical industry, the processes Dosing and pumping require sequential steps of sterilization so that, due to the possibility of control individual pumping chamber and closing chambers, the Automation expense is minimal. In fig. 4 shows a elbow groove (1215) inside the chamber pumping (1205), as well as perforations (1216) for the reception of anchor straps or fasteners, respectively, with which can be fixed all three plates. In fig. 4 can be seen very clearly the pumping chamber, the connection channels (e.g. 1206) and a groove (1215) for draining the product from the chamber pumping. Fig. 4th shows the closing chambers with the entry and exit openings.

Fig. 4b shows, for example, a scheme of camera connection, showing a pumping chamber (1205) and six closing chambers (eg 1200) with a circle in the figure, as well as their respective input channels (1207, 1208, 1213) and output channels (1209, 1210, 1214). Due to control by separate from each camera, different flows of liquid sequentially or alternately through a chamber of common pumping (1205) with all output channels existing.

In fig. 4, 4a, 4b you can see that a pumping chamber with more than three closing chambers and their corresponding input and output channels can be used for a automated sampling system. It can be created, by example, a pump change circuit with bypass from a reactor or a tube with product and through the inlet channel (1207) with the closing chamber of the pumping chamber (1205) and the output channel (1209). If, at any given time, a sample of reactor substance, the outlet channel (1209), by example, and the output channel (1210) opens to take a sufficient amount of a sample of substance from the chamber of pumping (1205). After the sample is taken, the pumping chamber it is cleaned through the inlet channel (1208) with a detergent inert. The detergent liquid can then flow through the output channel (1214) separately. The input channel (1214) is use, for example, for a sterilization process after End the reaction.

Example 6

In fig. 5 a membrane pump is shown as a multi-way distributor valve consisting of three plates according to the construction of the pump. It is also seen that the membranes elastic (1303, 1304) extend between the plates (1300, 1301, 1302) and use the cavities of the intermediate plate in a product compartment and common control. In this illustration, the Chamber control compartments are not expanded, of so that the membranes in the separation area adhere firmly to the outer plates. Through the plates (1300, 1302) the connections are shown by double arrows pneumatic (1305, 1306, 1307). The distributor valve is shown in the open state so that, when the elastic membranes, by For example, they move through a pneumatic pressure, the connection channels When the pneumatic pressure is reduced, the connection channels inside the product chambers are open for the liquid to pass through. In fig. 5 shows a multi-way distributor valve with a central inlet channel (1308) on the outer plate (1300), a connection channel (1309) is connect with it and reach the distributor compartment (1310). He distributor compartment has two connection channels (1311, 1312) towards the smaller closing chambers (1313, 1314) which, to in turn, they have output channels (1315, 1316) for transport of liquid You can see that an electropneumatic control unit connected you have to control at least two cameras to be able to release a circuit for material transfer. In this example, the multi-way distribution valve or the distribution valve, respectively, you can guide the material supplied to the channel left output (1315) and the right output channel (1316). For the washing can open both output channels at the same time to ensure a uniform distribution. Control unit electro-pneumatic does not require any depression generator because Liquid supplies usually have a pressure of exit.

In the plane of separation of the plates (1301, 1302) connection channels are presented on one side of the surface of the plate (1301) to be able to tightly close all connection channels at the same time outwards due to the large surface membrane. In this way, the valve multi-way distributor presents, preferably, in the plans of separation of the plates, great elastic films surface to facilitate the washing of the installation and the processes Due to the central supply of a material to be distributed, the elastic film (1303) has an opening shaped circle so that the input channel (1308) and the connection channel (1309) have a connection through which the liquid.

The distribution and closing chambers can pneumatically controlled with, for example, compressed air e, hydraulically, with liquid. However, they can also be used electromagnetic motors Distributor Valve Plates Multipath are connected to each other detachably.

Fig. 6 shows the scheme of the plate intermediate of a multipath distribution valve. You see a channel of central product inlet (1308 ') with a distributor chamber (1310 ') and a plurality of connection channels (1312') with their corresponding closing chambers (1314 ') and subsequent channels output (1316 '). With this application you can guide a liquid sequentially or parallel to a plurality of consumers, without However, the cameras must always be in an open state.

When the central input channel (1308 ') is close, as illustrated in fig. 6a, the two output channels (1400, 1401), for example, become input channels that they connect to different material suppliers and it is possible pump these two materials in series to any of the channels of connected output.

Example 7

Fig. 7 shows, as an example, a circuit of pump for sampling and sample preparation. According to fig. 4 two diaphragm pumps have been combined (700, 700 ') with a mixing chamber (701) to include all parts functional in the three pump plates but enlarged. The bombs of membrane have a pumping chamber (702, 702 ') and each chamber of Pumping has four closing chambers (703, 704, 705, 706 and 703 ', 704 ', 705', 706 ') The respective cameras are assigned the respective input and output channels (marked in fig. 7 with arrows of flow direction). Fig. 7 shows all components necessary for automated sampling with the following sample preparation and evacuation for a device analysis. The control unit for operation is not shown separately from the cameras.

In fig. 7 you can see that the sample of substance can be suctioned when the inlet channel (707) and the Output channel (708) are connected to a reactor. Through inlet channel (707) continuously pump the valve suction (704), pumping chamber (702), pressure valve (705) and the exit channel (708), an amount of substance from the reactor vessel At a predetermined moment, the control change, for example, so that the pressure valve (705) closes and the valve (706) is opened to transmit, by volume known from the pumping chamber, an amount of substance predetermined by the outlet channel of the valve (706) to the mixing chamber (701). As soon as the sample has been transmitted, the Pump (700 ') starts a pumping circuit to the mixing chamber. TO at the same time, the valve inlet channel (704 ') and the channel of Valve outlet (705 ') are connected to the chamber of mixture. The pump (700) can, simultaneously with the circuit of mixing chamber pump started, transport, through the inlet channel (709) and valve (703), an additional solvent towards the mixing chamber that would mix there with the sample of substance while the valve (704) is closed. After the mixing process by the pump (700 '), the substance sample diluted can be transported to an analysis device. During this process, the valve (705 ') is closed and the valve (706' ') is closed opens. Due to the sum of all pumping runs for feed the mixing chamber, the prepared sample can go out to through the output channel (710) and be taken for analysis without The number of races change. In addition, the input channel (709) is extends to the valve (703 '), so that a second pump it can be washed with a solvent after transport of the test when acting the corresponding valves.

Example 8

Fig. 8 shows a scheme of two 800 plates, 801 with an extended 802 elastic membrane. Plate 800 contains the pumping compartment 800 'and plate 801 shows the 801 'control chamber of the pumping chamber. The movement of the membrane or the deformation of the membrane always happens, according to the invention, between the boundary wall of the compartment of control and the boundary wall of the pumping chamber to ensure the maximum movement of the membrane through the contours of the cameras

In addition, in the first case of loading, it is seen that the membrane that extends between the plates and that is activated pneumatically (string length 807) can deform to the chamber height 804, taking the shape of the arc length 803

In the second load case, the extension of the membrane will be up to chamber height 806 with a length of arc 805, so that the membrane, in relation to the length of rope, would deform much more than in the first load case. Yes the deformation of the membrane is even greater, they can occur plastic fold formations so that the race of transport, and therefore the volume of travel important would be reduced by the folds thus formed. Besides, the Formation of membrane folds prevents the sealing of the input and output channels in and of the pumping chambers and closing.

This fact shows that the geometry of the pumping and closing chambers and the extension resulting from the membrane do influence the accuracy of the dosage. If of a pumping chamber with optimal dimensions (second case of load) with a spherical section surface with a diameter of approx. 255 mm and a camera height of approx. 1.5 mm, the Membrane deformation will not be permanent. The calculated length of the rope and the corresponding arc length are approx. 39 mm It follows from all this, that this example does not occur No permanent deformation of the membrane.

In practice, the dosing head is adjust with a mobile disk (1001) in the base position so that no No deformation of the membrane occurs. During the process of pumping, the path of the membrane in the geometric space The default pumping chamber can be reduced through the mobile disk setting (1001). The positioning concerning the membrane deformation mainly refers to the contour of The camera on the side of the product.

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References cited in the description This list references cited by the applicant has been developed only as an aid to the reader. It is not part of European Patent document. Although a lot of attention has been paid to the compilation of references, errors cannot be avoided or omissions, so the EPO declines all responsibility to this respect. Patent documents cited in the description

DE 10216146 A [0001] [0003] [0004] [0005] [0025] {} \ hskip1cm {} \ hskip0,2cm [0030] [0052] [0057] [0059]

US 3741687 A [0002]

Claims (10)

1. Pump head with multiple components comprising at least three rigid plates (201, 203, 205) and two membranes (204, 202) that are elastically positioned between said plates (201, 203, 205), and in which the planes (201, 203, 205) form at least two closing chambers (210, 212), particularly with the geometry of a spherical section, a spherical zone, a cylinder or a truncated cone, in which each it has an inlet opening (240) and an outlet opening (241) for the pumped liquid and in which the pumping chamber (211) and the closing chambers (210, 212) form, together with an inlet channel ( 207), the connection channels (208) and (209) and an output channel (206), a passage channel, and in which the pumping chamber (211) and the closing chambers (210, 212) are separated by membranes (204, 202) in a product compartment (230, 231, 232) and a control compartment (220, 221, 222) and in which the control compartments (220, 221, 212) include pilot lines (119, 120, 121) that are connected, by a control unit (100, 115), characterized by the fact that the outer plane (205) is correspondingly formed to to accommodate a mobile disk, thereby achieving that the control chamber of the pumping chamber is wider by accommodating a disk (1001) that can be displaced axially and inserted by a prolonged unilateral rod of the mobile disk that it reaches the outside of the dosing head and can be controlled from the outside of the pump manually (1003), thereby moving the disk (1003) inside the control compartment axially and reducing or enlarging, in this way, the predetermined maximum path, so that the volume of liquid dosed can be adjusted for each pumping stroke and that the pump operates without altering the volume of dead space in the product compartment and that the surface ie of the mobile disk is slightly less than that of the surface of the active pumping membrane and that the distance between the centers of each contiguous inlet or the output of each pumping or closing chamber, respectively, is twice or ten times the largest hydraulic diameter of each inlet opening (240) or outlet (241). 2. Membrane pump according to claim 1, characterized in that it is a double membrane pump consisting of three plates and that the pumping and closing chambers are located in the intermediate plate. 3. Membrane pump according to one of claims 1 or 2, characterized in that at least three and preferably four closing chambers (1200, 1201, 1202, 1203) are assigned to a membrane chamber in the medium plate pumping (1205). 4. Membrane pump according to one or more of claims 1 to 3, characterized in that the mobile disk (1001) comprises a prolonged rod (1002) with a piezo, pneumatic, electric or hydraulic drive adapted for remote adjustment Automated partial stroke through a rotating or pumping motion. 5. Membrane pump according to one or more of claims 1 to 4, characterized in that the connection or partial sectors of the input and output channels are positioned obliquely. 6. A membrane pump according to one or more of claims 1 to 5, characterized in that the inlet and outlet channels with closing chambers are assigned to a pumping chamber and comprise, at least in one outlet channel. , a mixing chamber to absorb a part of the sample and that a second pumping chamber with several input and output channels and closing chambers is assigned to this mixing chamber to be able to pump said part of the sample collected by the chamber mixing so that, when a separate solvent is introduced into the mixing chamber, the sample inside the chamber is dissolved or mixed so that, after mixing, it is possible to take and analyze a diluted sample by pumping. 7. Membrane pump according to one or more of claims 1 to 6, characterized in that it consists of 3 plates and can be used as a multi-way distributor valve. 8. Use of the diaphragm pump according to one or several of claims 1 to 7 as a pumping device or sampling system or for devices or installations of fill. 9. Use of the diaphragm pump according to claim 8 as a multi-way distributor valve, characterized in that it is composed of a product inlet channel (1308 ') with a distributor chamber (1310') and a plurality of channels of connection (1312 ') with its corresponding closing chambers (1314') and subsequent output channels (1316 '). 10. Use of a membrane pump according to claim 9, characterized in that the chambers comprise cavities of the same size each and can be controlled separately to have to open simultaneously, for the passage of the product, at least two cameras in the desired direction of passage and to control all cameras through a decentralized control unit.