ES2260751T3 - INTERMITTENT TRANSFER VALVE OF PRODUCTS FROM A RESERVE CONTAINER TO PACKAGING CONTAINERS. - Google Patents

Abstract

Valve for intermittent transfer of liquid-to-fluid products from a reservoir container (1) to packaging containers that are transported with a corresponding intermittency rate through the filling station of a packaging machine, whose valve is constituted by a product transport path that leads from the reservoir container (1) to the discharge nozzle (3) through a metering pump (2) and which has an intermittently adjustable closing and opening valve (V), the which is formed by a sealed gate (8) that can be sealed between plates (6, 7), and the plates (6, 7) contain channels (9, 10) aligned with each other that go from the metering pump (2) to the nozzle (3), a product supply channel (11) disposing against the gate (8) provided with a passage channel (13) being arranged on the plate (6) on the pump side and being arranged in the gate (8) on the side of the pump a transverse groove (12) open towards the upper plate (6) and endowed with a length (L) that covers the input channel (11) and the channel (9) that starts from the metering pump (2), characterized in that the passage channel (13) open towards the upper plate (7) is arranged at one end of the groove (12), starting open from the bottom (12 '') of the latter, and the transverse groove (12) with its The passage channel (13) can alternatively be adjusted to the mouth (11 '') of the product supply channel (11) and to the channel (9) that starts from the metering pump (2).

Description

Product intermittent transfer valve a reserve container for packaging containers.

1. Field of the invention

The invention concerns a valve for the intermittent transfer of liquid to fluid products a reserve container for packaging containers that transport with an intermittency rate corresponding to through the filling station of a packaging machine. By packaging containers are to be understood here especially glasses formed by deep drawing of a band of material deeply inlay packaging, which, after filling and its closure with a cover sheet, are separated from the band of packaging material individually or in groups, whose band runs through the packaging machine, that is, a so-called machine FFS, intermittently. In this regard, the invention relates to to the filling station of a machine of this class and at filling valves belonging to it.

2. Description of the state of the art

They belong to these filling stations with intermittent operation a product reserve container, dosing pumps connected with it and shut-off valves and opening controlled with a rate of intermittency correspondent. According to the number of rows of vessels formed in the packing material band, is arranged in the station filled, in a block building mode, a number corresponding of metering pumps connected with the container reservation, which in turn is linked with a number corresponding filling nozzles. For the sake of greater simplicity, there is always talk about just a bomb doser with corresponding filling nozzle and valve.

As far as it is known and as regards the closing and opening valves, is arranged in this case between the reserve vessel and the metering pump a valve of membrane of known construction class, specifically with in view of the sterile functioning that must be promoted in general. Under the filling pump and directly above the belt of circulating packaging material is then joined by a flexible tube, a simple opening / closing gate valve actuated in turn separately, whose lower part in the form of plate contains the transfer nozzle or the transfer opening. Such gate valves, made of highly material wear resistant (for example ceramic), have given better results that the rotary distributor valves also used in this sector, since these are not absolutely hermetic during the transfer of, especially, very fluids In addition, due to very narrow adjustments on such valves rotating distributor, problems may occur in the replacement of rotating distributors of their position of Cleaning to work position. There are also disadvantages with respect to the membrane valves mentioned above between the reserve container and dosing pump, since you are valves or their membranes have only wear resistance relatively small, particularly when it is to be handled filling material that contains lumps or sometimes grains or grain fragments

On the contrary, they have manifested as Virtually problem-free gate valves before mentioned, in which between two plates it has to move intermittently in a reciprocating adjustment gate between the closing position and opening position. Regarding such gate valves can be referred, for example, to documents DE-A-93 12 817 U1 and US-A-2,202,073.

The valve gate according to the document DE-A-93 12 817 U1 presents a passage opening, an intermediate piece that assumes the position of closure and, adjacent to it, a separate transition step that leaves Let the sweep liquid pass.

In the valve gate according to the document US-A-2,202,073 is provided by separated from the passage opening of the gate a step of transition or transverse groove that, with an adjustment corresponding to the gate, serves, on the one hand, for the suction of the filling material towards the filling pump and, by other side, for its block with respect to the filling pump, and in the locked position the opening of the passage leaves the same free time the path of the filling material from the pump to the valve discharge nozzle. The transverse groove does not participates in the transfer of filling material to the nozzle filling. To be able to sweep the material feed pipe filling and transition step, is present on the plate lower stationary valve a rush agent scan provided with a valve, with which a sweeping agent opening arranged in a position centered on the background of the transition step. It is not possible in this way a sweeping of the filling pump, the passage opening and the nozzle.

Summary of the invention

Starting from this, the invention is based on the problem of using the transition step or groove transverse existing in itself in the slide for both the suction of the filling material as for transport to the filling nozzle, that is, do that can be dispensed with provision of a separate passage opening for transport and create at the same time the necessary conditions so that, in a improvement and in the closing position of the gate, the transverse groove can also be used for scanning of a part of the material transport path of fill.

This problem is solved with a valve class cited at the beginning according to the invention, which has as a whole The following features:

It consists of a transport route of product leading from the reserve container, through a dosing pump, to the discharge nozzle and which has a intermittently closing and opening valve, the which is formed by an adjustable gate in sealed form between plates. The plates contain channels aligned with each other that go from the dosing pump to the nozzle, being arranged in the pump side plate a product delivery channel that flows into the gate provided with a passage channel. In the own gate is arranged by the side of the pump a open transverse groove towards the top plate, with a length that covers the contribution channel and the channel that starts from The dosing pump. According to the invention, still added decisively to these characteristics the fact that the channel of open passage towards the bottom plate is arranged at one end of the transverse groove, specifically starting open from the bottom of this one. The transverse groove can be adjusted here alternatively with its passage channel to the mouth of the channel of product contribution and to the channel that starts from the pump dosing

Regardless of the filling station complete thus obtains a more compact form of construction, since the dosing pump is seated directly on the valve Without the flexible tube joints so far, they are satisfied with This way the requirements according to the problem posed. Through a simple displacement of the gate with only one drive corresponding controlled can, on the one hand, load the pump dosing and, on the other hand, the route to the transfer nozzle by simply replacing the gate. Basically, it is certainly a simple valve two-way, but a special class two-way valve in since only one single step is present in the slide product in the form of a transverse groove with a channel of step that starts directly from it and is open to the side product feed and to the dosing pump. For the Discharge of the dosing pump product is claimed of this transverse groove only a small part for the passage of product, which develops to the nozzle through the step channel attached directly and open at the bottom of the cross groove.

In an advantageous improvement the gate It is also set scrollable to the other side, which takes into account the extent that the groove transverse with its passageway directly connected to it can also be used for scanning a part of the path of transport of filling material.

Refinements and forms of execution Additional consist of the following:

Since the dosing pump may be arranged with its exit opening directly above the gate valve, is advantageously possible with a corresponding dimensioning of the valve plate thickness upper also integrate directly into the upper plate at least a part of the dosing pump.

Since in such packaging processes and racking are usual product changes linked to a sweep and also cleaning sweeps before stopping the machine correspondingly, it is provided advantageously, with a view to gate can also move to the other side, arrange in one of the plates a sweeping agent channel with a open mouth towards the gate in such a way that the transverse groove with its passage channel in the position of gate sweep form the connection between the input channel of product and the sweeping agent channel. This means nothing more. that the gate, which moves only to one side during normal operation, you have to scroll for scanning to the other side, which will be explained in more detail.

In this context, the provision of the sweeping agent channel in the top plate, as this is It can make the lower valve plate thinner.

Also, with a view to cleaning or sweeping optimally, the two plates and the gate can be arranged so that can distance themselves from one another.

Brief description of the drawings

Next, the valve or the filling station according to the invention in more detail making reference to the representation of execution examples in the drawings.

They show schematically:

Figure 1, in section and on an enlarged scale, the valve configuration at the beginning of the suction process of filling material;

Figure 2, a section corresponding to the Figure 1 at the end of the delivery of the filling material;

Figure 3, a section corresponding to the Figure 1 in the position of the gate during scanning;

Figure 4, a section corresponding to the Figure 3 in a somewhat modified embodiment;

Figure 5, in plan, the slide view from the side of the pump;

Figures 6A-D, different operating phases of the gate; Y

Figure 7, for comparison, a configuration of usual filling stations so far.

Description of the preferred embodiments

The valve for intermittent transfer of liquid-fluid products pastes from a reserve container 1 to packaging containers B that are transported with a cadence corresponding flashing through the filling station of a packaging machine, consists of shut-off valves and opening 4, 5 (see figure 7) intermittently adjustable and arranged in the product transport path (PF (indicated with dotted line) leading from reserve container 1 to the discharge nozzle 3 through a metering pump 2, but whose valves are now grouped and according to the invention forming a valve V which is constituted by a sliding slide 8 sealed between plates 6, 7. Plates 6, 7 contain channels 9, 10 aligned with each other ranging from the pump doser 2 to nozzle 3. On plate 6 on the side of the pump is provided a product input channel 11 that flows into gate 8. Also, in gate 8 is arranged on the side of the pump a transverse groove 12 open towards the upper plate 6, with a length L covering the input channel 11 and channel 9 that starts from the pump doser 2, the transverse groove 12 being provided, in one end, of a passage opening 13 adjustable to the channels 9, 10.

Figure 1 illustrates the beginning of the career of 2 'piston suction of filling pump 2 and figure 2 illustrates the transport of the filling material to the nozzle of filled 3, having already reached the piston 2 'its position extreme

In figures 6A and 6B the valve is shown V with the corresponding container 1 of material stock filling provided with a 1 'rush of material replacement filled, the pump also being advantageously integrated doser 2 on the top plate 6, as indicated in the form strongly schematized.

The position of gate 8 with its groove cross section 12 according to figure 6A corresponds to the suction process or filling the dosing pump 2 (see also figure 1), that is to say that the filling material passes from the input channel 11 of product to the dosing pump 2 through the groove transversal 12. When the piston 2 'of the pump has reached its highest position represented and is present in the pump filling the amount of filling material measured therewith, it move gate 8 to a position according to figure 6B or the Figure 2 until the passage opening 13 of the gate 8 is aligned with channels 9, 10 and thus complete the process of transfer when lowering the piston 2 'of the pump. After Once the filling of a glass B is completed, the gate 8 is moved again to the right, that is, it is returned to the position according to figure 6A, and the complete process for the filling of the respective consecutive vessel in operation permanent.

As can already be seen in figures 1 and 2, on one of the plates 6, 7 there is arranged a channel 14 of agent sweeping with a mouth 15 open towards gate 8 of such so that the transverse groove 12 forms, in the position of gate sweep 8, the junction between input channel 11 of product and the sweeping agent channel 14 (see also the Figure 2), which is provided with a rush 14 'of output from sweeping agent (see Figure 6C). Preferably, channel 14 of the sweeping agent is disposed with its mouth 15, according to Figures 1, 2 and 4, in the upper plate 6, whereby the plate lower 7 of the valve can be made noticeably more thin.

The scanning process is illustrated in the figure 6C, being covered for the moment by him in this position so only reserve vessel 1, channel 11 and groove transversal 12. Regardless of the pump sweep doser 2 could also alternatively be used positions according to figures 6A and 6B, having to be provided, naturally, under the plate 7 a suitable device SA of collection of the sweeping agent for the scanning process, prefers, however, the embodiment according to Figure 6D, in which the plates 6, 7 and the gate 8 are arranged so that they can distance themselves or depart from each other, which does not require any more detailed explanation, than such constructive measures of devices belong to the current practice of sweeping and cleaning.

In Figure 5 it is represented, for the sake of a more complete exposure, a section of gate 8 in view in plant taken from the side of the pump. The dosing pump 2 arranged above indicated only with dashed line and points, corresponding the position of the transverse groove 12 represented with a continuous line to the gate position of the Figure 6A and corresponding the dashed line position shifted to the left to the position according to figure 6B.

However the dosing pump 2 is seated directly on the gate valve or it may be also integrated into it at least in part, the route is suppressed of relatively long PF product transport in the figure comparative 7 from dosing pump 2 to simple opening-closing valve 5 arranged there, which It is advantageous because the change of product results in a mixing path correspondingly shortened. Also due to the advantageous improvement of the incorporation of channel 14 of the sweeping agent on one or another plate 6, 7 the valve is suppressed PWV product change required and also represented in the figure 5 with its corresponding SA evacuation pipe from the swept.

The displacement of gate 1 to the closing position, to the opening position and also to the sweeping position is carried out in a known way by means of a servo drive 20 also schematically indicated in the figure 7, and the dosing pumps 2 are driven, for example, intermittently by hydraulic or pneumatic drives 21, as schematically indicated also in figure 7.

Claims (6)

1. Valve for intermittent transfer of liquid-to-fluid-paste products from a reserve container (1) to packaging containers that are transported with a corresponding intermittency rate through the filling station of a packaging machine, whose valve is constituted by a product transport path that leads from the reservoir container (1) to the discharge nozzle (3) through a metering pump (2) and which has an intermittently adjustable closing and opening valve (V) , which is formed by a sealed gate (8) that can be sealed between plates (6, 7), and the plates (6, 7) contain channels (9, 10) aligned with each other that go from the metering pump ( 2) to the nozzle (3), a product supply channel (11) disposing against the gate (8) provided with a passage channel (13) being arranged on the plate (6) on the pump side and being arranged in the gate (8) on the side of The pump is a transverse groove (12) open towards the upper plate (6) and equipped with a length (L) that covers the input channel (11) and the channel (9) that starts from the metering pump (2), characterized because the passage channel (13) open towards the upper plate (7) is arranged at one end of the groove (12), starting open from the bottom (12 ') of the latter, and the transverse groove (12) with its The passage channel (13) can alternatively be adjusted to the mouth (11 ') of the product supply channel (11) and to the channel (9) that starts from the metering pump (2). 2. Valve according to claim 1, characterized in that the gate (8) with its passage channel (13) is also movable in the opposite direction with respect to the supply channel (11). 3. Valve according to claim 2, characterized in that on the upper or lower plate (6, 7), horizontally offset with respect to the product supply channel (11), a channel (14) of sweeping agent is provided whose mouths ( 11 ', 15) open towards the gate (8) are connected with the transverse groove (12) in the closed position of the gate (8) with respect to the channels (9, 10). 4. Valve according to one of claims 1 to 3, characterized in that at least one part of the metering pump (2) is integrated in the upper plate (6). 5. Valve according to one of claims 1 to 4, characterized in that the plates (6, 7) and the slide (8) are arranged so that they can be distanced from one another. 6. Valve according to one of claims 1 to 5, characterized in that the gate (8) is made of ceramic.