DK155103B - MULTI-ROAD VALVE, ISAE FOR USE IN DIALYSIS - Google Patents

Abstract

1. A multiple-way valve, especially for use in dialyzers, comprising a valve body having inlet and outlet passages (2, 22, 32, 42 or 3a, 3b, 23a, 23b, 33a, 33b, 43a, 43b, respectively) provided therein, and having secured thereto two diaphragms (4, 5) of equal effective surface at the outer edges thereof in such a way that, between one surface of one of the diaphragms ans one surface of the valve body, a valve chamber (6, 7) is formed, and that, on at least one of the diaphragms a valve plate (4a, 5a) is arranged, said valve plate opposing a valve seat (6a, 7a) arranged in at least one of the valve chambers, through which valve seat said valve chamber is adapted to be connected with an outlet passage, whereby both diaphragms are connected with one another through a mechanic coupling device (8, 28, 38a, 48 to 52) which is rigid in its direction of movement, tne connection being such that the diaphragms move in opposite directions relative to the valve chambers, and whereby an actuator (10) for displacing the diaphragms is provided, characterized in that the two valve chambers (6, 7) are connected with one another and with a common inlet passage (2, 22, 32, 42), that the diaphragms (4, 5) as well as the valve plate or plates (4a, 5a) are formed as closed components, that each of the valve plates (4a, 5a) is integral with the diaphragms associated therewith, and that the coupling device (8, 28, 38a, 48 to 52) is arranged externally of the valve chambers (6, 7) and of the inlet and outlet passages (2, 22, 32, 42 or 3a, 3b, 23a, 23b, 33a, 33b, 43a, 43b, respectively).

Description

DK 155103 B

in

The invention relates to a multi-way valve which is particularly suitable for use in dialysis apparatus.

5 For such a valve, extremely high demands are placed on operation in terms of functionality and safety.

In addition, such a valve must satisfy the following requirements: 1. The controlling medium must not come into contact with ferromagnetic materials, as these may act as a magnetic trap for dissolved or entrained substances in the medium.

15 2. As far as possible, only first-class plastic materials, e.g. elastomers, touching the media flow.

3. The valve should have at least 20 non-flushed dead spaces.

4. The operation of the valve should be as independent as possible of the prevailing media pressure.

25 5. The valve's closing state should be indicated by a potential free, electrically usable signal.

The invention is based on a multi-way valve with a valve body through which inflow and outflow channels are introduced, and in which two membranes with equal working areas are secured with their edges so that between a surface of one of the membranes and a surface of the valve body is formed a valve chamber and at least one of the diaphragms is provided with a valve plate which faces a valve seat formed in at least one of the valve chambers over which this valve chamber can be connected to an outflow channel , and where both membranes, via one in 2

DK 155103 B

the direction of movement of the membranes rigid mechanical coupling device, is connected so that the membranes i. relative to the valve chambers move in opposite directions and where there is a control device for moving the membranes.

Such a valve is known and is e.g. described in German Publication No. 2,134,272.

This known valve has the disadvantage that not all the above mentioned requirements can be met with it. Thus, e.g. the coupling device between the two valve plates, both arranged on the ends of the harmonic bellows, is passed through a common valve seat and thus lies in the media flow. It is, however, extremely difficult to manufacture such a coupling device which, in circumstances, must transmit significant forces, of non-metallic material or even of plastic.

Some independence of the medium pressure is achieved by the known valve in that the valve plates are designed as rings, 20 and that the harmonic bellows are open. However, this has the disadvantage that significant non-flooded dead spaces occur.

In the U.S. 3,407,845 discloses a multi-way valve in which two inlet ducts can be connected via an adjacent 25 valve seats to an outlet duct. The valve plates adjacent to the valve seats are each integrated into a diaphragm and interconnected by means of a common valve rod. However, this valve rod is passed through the valve seats and thus lies directly in the media flow.

30 CH 420.762 discloses a multi-way solenoid valve in which one conduit connection is connected via mutual valve seats to the other two conduit connections. Between the two valve seats is a plastic double-seat closure element, the operating rod system being passed through one valve seat. This control rod system is surrounded by a hose-like layer of plastic, which is partly connected to the double seat closing element and partly to the housing, so that 3

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that the medium does not come into direct contact with the control rod system. Since the valve body can also consist of plastic, this valve media comes into contact with plastic parts only. However, the operation of the control rod system through the valve seat has the disadvantage that there is an area difference between the nominal illumination of the valve and the effective area which requires an increase in the adjusting force to be produced by the electromagnet. This is especially disadvantageous in embodiments with small nominal illuminations, since the operating rod system cannot be designed arbitrarily thin. Furthermore, it is difficult to design this valve so that it is completely independent of the system pressure.

In the U.S. No. 3,991,788 discloses a multi-way valve, in which 15 a plurality of diaphragms are incorporated into several valve plates, each of which faces valve seats, through which outflow ducts can be connected to a common valve chamber. At the rear of the diaphragm are valve lifters, which, with their front ends, abut against the back of the valve plates, but are not firmly connected thereto. In this way, the valve seats are not rigidly interconnected, which means that the operation of the valve is not independent of the system pressure.

The object of the invention is to provide a valve of the above-mentioned type which is designed to meet the requirements set out above. Furthermore, the valve should be able to be designed as a 3/2-way valve or as a 2/2-way open or shut-down valve with no major changes to the basic structure. Finally, when designing as an electromagnetic valve at the highest possible hydraulic performance, the valve should have the lowest possible electricity consumption.

This is achieved by the valve according to the invention, which is characterized in that the two valve chambers are connected to each other and to each other.

o C

a common inflow channel, and that both the diaphragms as well as the valve plate or valve plates are closed and each valve plate is integrally formed with the associated diaphragm and the coupling device is arranged outside

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4 the valve chambers and the inflow and outflow ducts.

As further explained below by way of example, the valve according to the invention g satisfies in an excellent manner the requirements set out above. The independence of the system pressure is achieved by the two membranes being similarly affected by the system pressure which is compensated by the rigid mechanical coupling device. In principle, it is possible to design the valve according to the invention using flat membranes. However, it has been found to be particularly advantageous when the membranes are either designed as roll diaphragms or as harmonics, since, with these types of membranes, no change in the effective areas occurs, and a complete compensation of the system pressure is consequently possible. so that the required adjusting force is determined only by the area differences between the valve seats.

This means that in a valve with a nominal diameter of 20 mm, a coupling device with the two diaphragms in any closed position with a force of 0.7 N / bar can be held in the end position. The operation of the valve can therefore be described as bistable.

Various advantageous embodiments of the valve according to the invention are possible and are described below and in the subclaims.

The valve according to the invention may be designed as an electromagnetic valve, whereby the operating device contains a magnetic coil with an anchor movable against a spring force. However, other controls, such as hydraulically or pneumatically operated controls, may also be used.

Thus, e.g. the control device also includes a movable permanent magnet with two stable end positions as well as a magnetic coil actuated by control pulses for moving the permanent magnet from one end to the other.

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5

Since the magnetic circuit is completely separate from the hydraulic circuit, the use of such a permanent magnet is possible because no corrosion resistance should be taken into account.

5

Furthermore, since the active operating mechanisms of the valve according to the invention are freely accessible from the outside, it is easy to scan these operating mechanisms, e.g. the coupling device, by means of suitable devices 10 for determining the setting of the valve. Such a scan can e.g. be done with the help of proximity initiators or also with a simple micro switch.

In one embodiment of the valve according to the invention as an electromagnet, operation by means of alternating current can also be carried out without delay, since the difference between the force and the form closure is smoothed by the elastic behavior of the valve plate integrated in the membranes.

20

As explained in more detail below, the mechanical coupling device rigid in the direction of movement of the membranes does not necessarily have to be made up of fixed parts, but it is possible here to use a hydraulic system.

25

The invention will now be explained in more detail by way of example and with reference to the accompanying drawings, in which: FIG. 1 is a longitudinal section through a first embodiment 30 of the valve according to the invention in a configuration as a 3-way valve; FIG. 2 shows a variant of the valve according to FIG. 1 in a design which is open in a resting position in a 2/2 way valve; FIG. 3 shows another variant of the valve of FIG. 1 in a design which, in the rest position, closes 2/2-way valve, 6 ...... -

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FIG. 4 shows another embodiment of the valve according to the invention in a configuration as a 3-way valve; FIG. 5 shows a third embodiment of the valve according to the invention in a configuration as a 3-way valve; FIG. 6 shows a fourth embodiment of the valve according to the invention in a design as a 3-way valve with a coupling device designed as a hydraulic system; FIG. 7 shows yet another variant of the valve of FIG. 1 in a design as a 3/2-way valve with mutually overlapping closing positions; and FIG. 8 is a sectional view of a variant of the embodiments of FIG. 1-5 for a system suppressor valve.

In FIG. 1 shows a 3/2-way valve which is designed as an electromagnetic valve. It has a valve body 1 shaped as an exemplary rectangular block, through which is passed an inflow duct 2 and two outflow ducts 3a, 3b. The valve body 1 can e.g. consist of plastic or other non-ferromagnetic material. In the embodiment of FIG. 1 the upper side of the valve body 1 is fixed to the edges of a roller membrane 4, the inside of which 25 together with the corresponding surfaces of the valve body 1 forms a first valve chamber 6. In the embodiment shown in FIG. 1, the lower side of the valve body 1 is similarly attached to a roller membrane 5 which together with the surface of the valve body forms another valve chamber 7. The valve chambers 6 and 7 are interconnected by means of a connecting channel 2a, in which also the inflow channel 2 . The outflow channels 3a and 3b open into the valve seats 6a and 7a, respectively, which are arranged in the valve chambers 6 and 7. The rolling membranes 4 and 5 rolling against the supporting surfaces 4b and 5b respectively are in their middle regions.

U.S

formed as valve plates 4a and 5a, respectively, wherein valve plate 4a is opposite valve seat 6a and valve plate 5a is opposite valve seat 7a. The roller membranes 4 and 5 may be

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7 made of plastic, rubber or other suitable elastic material. The valve plates 4a and 5a are integrated with the roller membranes 4 and 5. The middle regions of the two roller membranes 4 and 5 are connected to each other by means of a rectangular frame 8 which encloses the valve chambers 6,7. The frame consists of two portions 8a extending transversely of the longitudinal axis L of the valve and two extending parallel to the longitudinal axis L of the valve and parts 8b formed as guide rods. The portions 8a are connected to the membranes 4 and 5. via connecting pieces 8c, respectively. The portions 8b 10 are inserted through recesses or bores 8d which are located in the valve body. 1. The coupling of the two diaphragms 4 and 5 by means of the frame 8 takes place so that one of the two valve plates (in FIG. 1 valve plate 4a) sits on the valve seat (in FIG. 1 valve seat 6a), while the other valve plate ( in Fig. 1, the valve plate 5a) is lifted from the valve seat (in Figs.

1 valve seat 7a).

The valve body 1 is connected to a control device via a mounting frame 9 which, in the embodiment shown, has a magnet coil 10 enclosed by a hanger 11, through which a movable anchor 12, which is connected at its lower end to the frame 8, has been introduced. In the resting position of the valve, the anchor 12 is pressed downwardly by the force of a spring 13 so that in FIG. 1, the valve occurs, 25 at which the valve seat 6a is closed and the valve seat 7a is opened. By magnetizing the magnet coil 10, the anchor 12 is drawn against the force of the spring 13, thereby opening the valve seat 6a and closing the valve seat 7a.

30

As can be read immediately from FIG. 1, the system pressure via the inlet ducts 2, 2a acts uniformly on the inside of the two membranes 4 and 5 and this pressure is compensated by the frame 8 connecting the two membranes. The frame 8 penetrates nowhere through the cavity which is flowed through the media stream. Apart from the two valve chambers 6 and 7, as well as the inlet ducts 2 and 2a and the outflow ducts 3a and 3b, the valve has no further voids affected by the medium. All parts flowing through the medium may be made ............ 8

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In the embodiment shown in FIG. 1, the valve body 1 is shown as a closed block. Of course, other embodiments are as well. possible, in which the inlet ducts 2 and 2a and the outflow ducts 3a and 3b are passed through a e.g. as a mounting frame, a valve body formed which only on the side facing the valve chambers 6 and 7 has closed surfaces.

In FIG. 2 shows a variant of the embodiment of FIG. 1, which is designed as a 2/2-way valve, namely in that the valve in the rest position is opened. In FIG. 2, in the same manner, portions are provided with the same reference numerals as in FIG. 1. Through it in a manner similar to FIG. 1, a valve body 1 'is formed with an inlet duct 2' and an outflow duct 3a *. On the two facing faces of the valve body 1 'are in the same way as in the embodiment of FIG.

1, roll diaphragms 4,5 are provided which are supported against roll faces 4b, 5b and are formed in the middle as valve plates 4a, 5a. The roller diaphragms 4,5 together with the valve body 11 restrict the valve chambers 6.7. The valve chamber 6 is connected through the valve body 20 1 'and over a connecting channel 2a' to the valve chamber 7. The inlet duct 2 'opens into the valve chamber 6, while the outflow duct 3a' through the valve seat 7a 'opens into the valve chamber 7. Only the valve seat 6 is located in the valve seat. a ledge 6a 'against which the valve plate 4a of the 25 of FIG. 2 is resting. The two membranes 4 and 5 are again connected to each other via the frame 8 of the parts 8a, 8b and 8c, whereby the parts 8b pass through the recesses 8d in the valve body 1 '. The valve body 1 'is connected via the mounting frame 9 to the operating device, which contains the magnet coil 10, the bracket 11 and the anchor 12 moving against the spring 13.

The system pressure acts in both switch positions of the valve over the inflow duct 2 'on the membrane 4 and the connection duct 2a1 on the membrane 5. In the opened state of the valve, the two valve chambers 6 and 7 are flowed through medium.

By pulling the anchor 12 against the force of the spring 13, the valve plate 5a leans against the valve seat 7a 'and the valve

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9

The FIG. 3 differs from that of FIG. 2 in some details, whereby the valve becomes a 2/2-way valve closed in the rest position. The valve body .1 '' contains the inlet channel 2 5 which flows into the lower valve chamber 7 'and the outflow channel 3a' which opens into the upper valve chamber 6. The two valve chambers 6 and 7 are again connected to each other via a connecting channel 2a'1 which penetrates the valve body 1 '*. In the upper valve chamber 6 is the valve seat 6a, associated with the outflow channel 10 3a'1, while at the same location in the lower valve chamber 7 is a ledge 7a '' against which the valve plate 5a rests on the open valve. The two roll diaphragms 4,5 are again interconnected by means of the one shown in FIG. 1 and 2 described above 8. The operating device connected via the mounting frame 9 with the valve bearing 1 '' again has a magnetic coil 10 with a bracket 11 and an anchor 12 movable against the action of the spring 13.

As can be read immediately from FIG. 3, the valve plate 4a is in the position shown in FIG. 3 on the valve seat 6a, 20, 20 and the valve is closed. By pulling the anchor 12 against the force of the spring 13, the valve opens.

In order to achieve a good leveling of the system pressure, in the embodiments of FIG. 2 and 3 instead of a connecting duct 2a 'and 2a' 'there are also several connecting ducts 25 which can be arranged around the valve seats 7a' and 6a 'respectively.

FIG. 4 shows another embodiment of a 3/2-way valve in which the valve chambers are located on the same side of the valve 11 squirrel. Here too, in order to demonstrate the connection with the previously described embodiments, there are structural members which in their design closely correspond to structural parts of the embodiment of FIG. 1, denoted by the same reference numerals.

'10

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The valve body 21, formed again as a flat structural member, is penetrated by a common inflow channel 22 and the two outflow channels 23a and 23b. In the embodiment of FIG. 4 upper side of the valve body 21 is provided with roll diaphragms 4 and 5, each of which together with the corresponding part of this surface of the valve alloy 21 form the valve chambers 6 and 7. The valve chambers 6 and 7 are connected to a connecting channel 22a, in which the common inflow channel 22 apologize. In the valve chamber 6, the outflow channel 23a opens through the valve seat 6a, and in the valve chamber 7 the outflow channel 23b opens through the valve seat 7a. The roller diaphragms 4,5, which support the substrates 4b and 5b, respectively, have at their central regions the integral valve plates 4a and 4b, which face the valve seats 6a and 7a. The outer sides of the rolling membranes 4 and 5 are connected at their center to each other through a coupling device 28, which in this case is formed as a two-arm lever which, with its pivot point 28d, supports the valve body 21 and whose one arm 28a is via a connecting piece 28c is connected to the rolling membrane 4 and the other 20 weight arm 28b is connected to the rolling membrane via a connecting piece 28c. In this type of coupling, as with the previously described embodiments, the movement of the two rolling membranes 4 and 5 with respect to valve chambers 6 and 7 occur opposite each other. Above the valve body 21, an operating device is provided, via a mounting frame 29, which contains a solenoid coil 10 with a bracket 11 and in which an anchor 12 'is inserted against the action of a spring 13'. The outer end of the anchor 12 'is connected via a connecting element 27 to the connecting piece 28c of the arm 28a. Upon attraction of the anchor 12 ', the valve plate 4a rises from the valve seat 6a, and the valve plate 5a lays against the valve seat 7a.

The operation of the device shown in FIG. 4 is substantially the same as in the embodiment of FIG. 1. The system pressure acts via the inflow duct 22 and the connecting duct 22a on the inside of both roller membranes 4,5 and is compensated by the lever arm 28.

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π

Also shown in FIG. 4 can be designed as a 2/2-way valve in which one of the two outflow ducts is closed and the inflow is therefore introduced directly into the valve chamber from which the outflow is maintained, while maintaining the connecting duct.

In FIG. 5 is a 3/2-way valve embodiment, in which the operating device is arranged between the two valve chambers. Also in this embodiment, for the embodiment of FIG. 1 exactly corresponds to 10 structural parts denoted by the same reference numerals.

In this embodiment, the valve body 31 is U-shaped with the two tabs 31a and 31b. On the opposite faces of the two tabs 31a and 31b are arranged the roller membranes 4 and 5, which with portions of these inner surfaces form the valve chambers 6 and 15, which are, via a connecting channel 32a passing through the valve body 1, in which also the interference channel 32 interconnected, connected to each other. In the valve chamber 6, an outflow channel 33a introduced through the structural member 31a, while an outflow channel 33b inserted through the structural member 31b opens into the valve chamber 7. As in the previously described embodiments, the diaphragm 4 has a valve plate 4a adjacent to the valve seat 6a. the roller diaphragm 5 has the valve plate 5a facing the valve seat 7a.

The two roller diaphragms 4 and 5 are connected to each other via a coupling device which is passed through an operating device which is arranged between the two tabs 31a and 31b. This control device possesses, as in the aforementioned embodiments, a magnetic coil 10 connected via a holder 39 to the valve 30 with a bracket 11, into which an anchor 12 "against the action of a spring 13" is movably inserted. One end of the anchor 12 "is connected to a diaphragm 4 via a connecting rod 38a and a connecting piece 38c, while the other end

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12 of the anchor is directly connected to the membrane 5. In the embodiment of FIG.

5 shows the valve corresponding to the resting state. the valve for the control device, the valve plate 5a rests against the valve seat 7a. By tightening the anchor 12 ", the valve plate 5a is lifted from the valve seat 7a and the valve plate 4a is brought to rest against the valve seat 6a.

In this embodiment, too, all the requirements set out in the introduction are fulfilled. In addition, in smaller conversions, this embodiment 10 can also be changed to a 2/2-way valve.

In FIG. 6, there is shown an embodiment designed as a 3/2-way valve which corresponds substantially to the embodiment according to fig., With respect to the location of the valve chamber in the valve leg network.

1. This coupling of the two rolling membranes 4 and 5 takes place in this embodiment, not by a mechanical system constructed with fixed structural members, but by a hydraulic system.

Through the valve body 41, the inlet passage 42 opening in the connecting duct 42a 20 for the two valve chambers 6 and 7 and the outlet channels 43a and 43b which open via the valve seats 6a, 7a in the valve chambers 6 and 7. The two roller membranes 4 and 5 are connected at their outer sides to hydraulic cylinders, namely in such a way that the consideration of the roller membranes 4 and 5 is simultaneously formed as cylinders 44 and 45, in each of which a piston 46 connected to the roller membrane 47 respectively are introduced. The hydraulic fluid therefore acts directly on the outside of the roll diaphragms 4, 5 and on the surfaces of the pistons associated with them 46,47. The hydraulic cylinders 44,45 are directly connected to each other via one of the branches 48 and 49. The two hydraulic lines 48, 49 each open at one end of a guide cylinder 50, in which a guide piston 52 is slidably inserted against the force of a spring 53. Both the two hydraulic cylinders 35 44 and 45 as well as the hydraulic lines 48 and 49 and the control spaces 51a and 51b adjacent to the end faces of the guide piston 52 are completely filled with the hydraulic fluid. The guide piston 52 is simultaneously formed as an anchor in a magnetic coil 10

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13 with a hanger 11. At one end face of guide piston 52 there is a valve plate 54a which faces a valve seat 55a, while at the other end surface of guide piston 52 there is a valve plate 54b which faces a valve seat 55b. The guide piston 52 is sealed against the wall of the guide cylinder clean 50 by means of a ring seal 56 which has a through slot 56a. In the embodiment shown in FIG. 6, which corresponds to the resting position of the control device, the valve plate 4a rests on the valve seat 6a, while the valve plate 5a is lifted from the valve seat 7a. By pulling the anchor forming the piston 52 against the force of the spring 53, the hydraulic fluid via the conduit 49 is forced into the hydraulic cylinder 45 and pulled out of the hydraulic cylinder 44 via the conduit 48. Because of the hydraulic fluid Incompressibility and the completely filled state of the system, a rigid connection occurs in the direction of movement of the rolling membranes 4 and 5 between the two rolling membranes and the valve plate 4a lifts as the valve plate 5a settles.

In the two end positions of the control piston 52, the hydraulic circuit is blocked through the valves 54a-55a and 54b-55b, respectively, thereby securing the fixed end positions for the valve plates 4a and 5a. A static pressure equalization between the two conduits 48, 49 takes place via a passage slot 56a in the sealing ring 56.

The FIG. 6 has the great advantage that the valve and the operating device can be spaced apart.

In FIG. 7, a variant of the embodiment of FIG.

1, which is designed as a 3/2-way valve and differs from the embodiment of FIG. 1 in that, at each of the two valve plates 4a and 5a, on the side facing the valve seats 3, 5, 6a and 7a, a closing plug 4c and 5c is provided, the diameters of which correspond at least approximately to the internal diameters of the valve seats 6a and 7a. The length of these closure plugs 4c and 5c is measured such that both closure plugs 4c and 5c in one

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14 in FIG. 7, the center position of the valve dives into the associated valve seats 6a and 7a, thereby closing them. In this way, it is achieved that the two outflow channels 3a and 3b are closed in a central position of the valve. The total lifting of the valve plate must be measured such that one of the two valve seats 6a and 7a is opened in the two end positions. This means that the total lifting must be greater than e.g. in the embodiment of FIG. 1, with a distance corresponding to the length of the closure plugs 4c and 5c respectively.

10 In relation to the embodiment of FIG. 1 shows a somewhat larger necessary lifting in the embodiment of FIG. 7 is taken into account in design, in that the transverse part 8'a of the frame 8 is curved, as seen in the figure.

15

The embodiment of FIG. 7 is of particular importance when, in operation of the valve, it is necessary to prevent the two outflow channels 3a and 3b from being opened by setting in a center position for a short time, which can lead to errors in the dosage of the controlled liquid quantity. In the embodiment of FIG.

7, there is thus an overlap of the closing phases.

In the FIG. 1 to 5, the roller diaphragms 4 and 5, respectively, are arranged so that their folds face outwards. In this embodiment, the valve is intended for use in system overpressure. Of course, it is also possible to use the valves for internal system suppression.

In this case, it is true that, using roller membranes, their flush position must be reversed. How this must be done is shown in FIG. 8. FIG. 8 shows a section of a valve in an embodiment which may correspond to FIG. 1-5 in the region of a roller membrane. The roller diaphragm 4 'is secured to the valve body 1 in such a way that its unrolling outer surface rests against the supporting surfaces 4'b of the valve body 1. As with the other 35 embodiments, the roller diaphragm 4 'in its middle region is formed as a valve plate 4'a opposite the valve seat 6a.

Claims (11)

1. Multipurpose valve, especially for use in dialysis apparatus, and having a valve body (1.1 ', 1 ", 21.31.41) through which inflow and outflow channels are introduced (2,22,32,42 3a, 3b, 23a, 23b, 33a, 33b, 43a, 43b), respectively, and in which two membranes (4,5) with equal working areas are secured with their edges so that between a surface of one of the membranes and one surface 10 of the valve body is formed a valve chamber (6,7), and at least one of the membranes is provided with a valve plate (4a, 5a) which faces an valve seat (6a) formed in at least one of the valve chambers. , 7a), over which this valve chamber can be connected to an outflow channel and wherein both membranes, via a mechanical coupling device (8,28,38a, 48-52) rigid in the direction of movement of the membranes, are connected so that the the valve chambers move in opposite directions and there is a control device (10) for moving the diaphragm characterized in that the two valve chambers (6,7) are connected to each other and to a common inflow channel (2,22,32,42), and that both the diaphragms (4,5) as well as the valve plate (s) ( 4a, 5a) are closed and each valve plate (4a, 5a) is integrally formed with the associated membrane, and the coupling device (8,28,38a, 48-52) is disposed outside the valve chambers (6.7 ) and the inflow and outflow channels (2,22,32,42, 3a, 3b, 23a, 23b, 33a, 33b, 43a, 43b, respectively). 30 Multiple valve according to claim 1, characterized in that the diaphragms (4,5) are arranged on two opposite sides of the valve body (1,1 ', Γ *) and that the coupling device is formed as a rectangular frame (8). ), which encloses the valve chambers (6,7), whereby the transverse (8a) portions (8a) of the frame are connected to the outer sides of the diaphragms (4,5) and the portions (8b) of the frame are passed through side recesses or bores (8d) in the valve body (Ι, Ι ', Ι "). DK 155103 B Multipurpose valve according to claim 1, characterized in that the diaphragms (4,5) are arranged on the same side of the valve body (21) and that the coupling device is formed as a two-armed 5 weight arm (28), the pivot point (28d) of which is located in the valve body (21), and whose weight arms (28a, 28b) are connected to the outer sides of the diaphragms (4,5) and wherein one of the weight arms (28a) is connected to the operating device (13 '). 2Q Multipurpose valve according to claim 1, characterized in that the valve body (31) has a U-shape and the diaphragms (4,5) are positioned so as to face each other on the inside of the tabs (31a, 31b) in the valve body (31). ), and the coupling device (38) lies between the two tabs (31a, 31b) of the valve guide (31). 15 Multipurpose valve according to claim 4, characterized in that the coupling device is formed as a through connecting rod (38a), which the control device engages with, where the control device (10) is arranged between the tabs (31a, 31b) of the valve body (31) and the coupling device ( 38) is passed through the operating device, and furthermore, the operating device is a magnetic coil (10) with an anchor (12 ") moving in the direction of movement of the membranes (4,5) connected to the two diaphragms (4,5). Multipurpose valve according to claim 1, characterized in that the coupling device is a hydraulic system and that each diaphragm (4,5) is connected to a hydraulic cylinder (44,45) and wherein the two hydraulic cylinders (44,45) are interconnected via a fluid conduit (48,49), and an externally operable insertion into the fluid conduit (48,49) and at both ends of the hydraulic fluid adjacent piston (52) formed as anchor in a magnetic coil (10). 3 g Multipurpose valve according to claim 6, characterized in that the hydraulic cylinders (44,45) are arranged directly at the valve body (41) and are designed so that the cylinders (44,45) each enclose one of the diaphragms (4,5) at its outer side, and the cylinder piston (46.47) is positioned directly against the outside of the diaphragm (4,5). Multipurpose valve according to one or more of claims 1-7, characterized in that it is configured as a 3/2-way valve 1 and in which a valve seat (6a) connected to an outflow channel (6a) is located in each valve chamber (6,7). , 7a). jq A multi-way valve according to one or more of claims 1-7, characterized in that it is designed as a 2/2-way valve, wherein both diaphragms (4,5) have a valve plate (4a, 5a) and therein a a valve seat (7a ', 6a ") connected to an outflow channel (6a) is arranged in the valve chambers (6,7), while a closed ledge (6a', 7a) is arranged in the second valve chamber (6,7). "), wherein the inflow channel (2 ', 2") is connected directly to the valve chamber having the closed ledge (6a', 7a "). 2ø Multipurpose valve according to one or more of claims 1-9, characterized in that the operating device has a solenoid coil (10) with an anchorage movable against a spring force (12,12 ', 12 ", 52). Multipurpose valve according to one or more of Claims 1 to 10, characterized in that each valve plate (4a, 5a) at its side facing the valve seat (6a, 7a) has one at the closure of this valve plate into the valve seat (6a, 7a). projecting closure plug (4c, 5c), the diameter of which is at least approximately 30 corresponding to the inner diameter of the valve seat (6a, 7a), the length of said closure plug and the passage of the valve plate (4a, 5a) being adapted so that the two end positions are opened a valve seat (6a, 7a), while both valve seats (6a, 7a) in an intermediate position are at least partially closed.