Valve unit

Abstract

A device comprising the following: a valve unit, an actuator, the actuator being able to be operatively connected to the valve unit, and an assembly module, the assembly module and the actuator together forming a separate unit that can be connected to the valve unit.

Description

[0001] valve unit

[0002] The subject matter of the invention relates to a device comprising a valve unit and an actuator, wherein the actuator can be brought into operative connection with the valve unit.

[0003] Such devices are used in particular in milking plants for milking milk-producing animals, in particular cows, sheep, goats, llamas and other milk-producing animals.

[0004] The milking system comprises several milking stations. Each milking station is equipped with a milking device comprising milking clusters with at least one teat cup. A teat cup is designed to be applied to a teat of the milk-producing animal and to drain milk from it. The teat cup comprises a teat cup sleeve into which an elastically moldable teat cup liner is inserted. The term "teat cup liner" is used synonymously here. Teat cup liners can also be made of other elastic materials. Silicone teat cup liners are particularly hygienically durable.

[0005] The teat cup is connected to a milk claw via a short milk hose, if required. The milk claw outlet is fluidly connected to the milk line system.

[0006] Since raw milk is an important foodstuff and a raw material for the food industry, it is necessary for milk to meet both national and international quality standards to protect consumers and ensure technical processability. There are corresponding national and international regulations that must be observed. Compliance with specified hygiene standards is also important to ensure high milk quality. Therefore, it is necessary to subject the components of a milking system to a cleaning process. This cleaning process can be carried out using a fluid, particularly water, with or without cleaning, disinfecting, or other additives.

[0007] In this context, it is therefore necessary to prevent contamination of the milk being processed with a cleaning fluid. For this purpose, appropriate devices with valves are used. Such valves are also called safety valves.

[0008] Such valves are also intended to ensure that unusable milk, for example from cows that are ill, does not get into the usable milk.

[0009] A safety valve or valve is preferably understood to be a valve unit comprising a housing with a housing body having a passage with an inlet and an outlet, and a housing cover detachably connected to the housing. The valve unit has a movable piston that closes or opens the passage depending on its position. The piston has a piston shaft that extends through a seal and the housing cover. The seal is preferably a diaphragm seal arranged between the housing cover and the housing body. It is also possible for the seal to be a shaft seal.

[0010] Since a very high level of safety must be maintained, especially in milking systems, it is well known that at least the seal that seals the piston, especially the diaphragm seal, must be replaced at regular intervals. Previously known solutions, in which safety was given priority, have a relatively complex structure.

[0011] Based on this, the invention is based on the objective of providing a device that meets a high level of security but is associated with a lower degree of complexity.

[0012] This object is achieved by a device according to the independent claim. Further advantageous embodiments are the subject of the dependent claims.

[0013] The device according to the invention comprises a valve unit, an actuator, and a mounting module. The actuator can be operatively connected to the valve unit. The actuator is preferably an electrically, pneumatically, or electronically operated actuator. The actuator can, for example, be a pneumatically operated actuator with a cylinder-piston unit. The piston is connected to a rod that interacts with the valve unit. Depending on the position of the actuator piston, the valve unit is opened or closed, thus opening a fluid connection or passage within the valve unit.

[0014] The device according to the invention comprises an assembly module. The assembly module and the actuator together form a separate unit. This separate unit can be detachably connected to the valve unit.

[0015] The device according to the invention reduces the degree of complexity of the device. The assembly module enables the assembly module as such to be connected to and separated from the actuator of the valve unit. Conversely, this also means that when the connection between the valve unit and the assembly module is dissolved, the valve unit is released as a separate unit. This structural design reduces the degree of complexity of the device. In particular, this structural design of the device makes it easier to carry out maintenance work on the valve unit. If a separation is carried out between the assembly module and the valve unit, access to these parts of the valve unit can be simplified, for example if the valve unit is a valve which has a diaphragm seal and a piston.This also means that the service time for replacing a diaphragm seal and, if necessary, the diaphragm seal with the piston can be reduced.

[0016] A further advantage of the invention is that in case of a malfunction of the actuator, the assembly module can be replaced with the actuator.

[0017] The assembly module and the valve unit are geometrically coordinated so that the assembly module can be connected to the valve unit in a predetermined, predefined position. The connection between the valve unit and the assembly module is preferably a positive connection. It can, in particular, be designed as a snap-in connection. For this purpose, the assembly module has corresponding snap-in projections that engage with correspondingly designed stops on the valve unit.

[0018] A particularly preferred embodiment of the device is one in which a housing body of the valve unit has a first nozzle which forms the inlet and a second nozzle which forms the outlet. The mounting module has two tabs which are formed parallel to one another, each tab having an opening so that one tab engages around the first nozzle and the second tab engages around the second nozzle. In this arrangement, the housing body is located between the tabs. This embodiment of the mounting module achieves positioning of the mounting module with the valve. The mounting module can furthermore have stops so that spatial positioning of the mounting module with the valve unit is achieved.

[0019] The actuator has a driver connected to the piston of the valve unit. This is a positive connection. A preferred embodiment is one in which the driver has a recess extending in the axial direction of the piston, into which a piston shaft can be inserted. The mounting direction is transverse or perpendicular to the axial direction of the piston.

[0020] Furthermore, the driver preferably has two slots provided perpendicular to the axial direction of the piston, which are parallel to each other and spaced apart. The piston shaft has corresponding radially outwardly directed discs that are or will be inserted into the slots.

[0021] This achieves the up and down movement with a vertical displacement of the piston.

[0022] The inventive concept allows, on the one hand, a variant in which the mounting module is fixed in place, for example, to a supporting structure or a wall. To replace the diaphragm seal and any other seals located in the valve unit, the valve unit is detached from the line to which it is connected. On the other hand, it provides the option of detaching the mounting module from the valve unit when the valve unit is permanently connected to a milk-carrying line.

[0023] Once the diaphragm seal and any other seals have been replaced, the valve unit can be reconnected to the line. The stationary nature of the mounting module makes alignment of the valve unit easier. If it is not possible to permanently attach the mounting module to a supporting structure or wall, for example, the mounting module is detached from the valve unit to replace the diaphragm seal and any other seals on the valve unit. The valve unit remains connected to the line. After replacing the diaphragm seal and any other seals, the mounting module, which forms a separate unit with the actuator, can then be connected to the valve unit.

[0024] In the field of milking technology, so-called block-bleed-block valves are also used. Such block-bleed-block valves are specified, for example, by the American FDI directive in the field of milking technology. One such block-bleed-block valve is known, for example, from the publication DE 10 2019 128 235 A1. Such a valve unit has a check valve with an outlet connected to the inlet of a second check valve. The valves are connected in series. A drain outlet is provided between the valves, which leads out via a drain valve.

[0025] The important thing with block-bleed-block valves of this type is the sequence of opening and closing the individual valves. The seals also need to be replaced for all three valves. If such an arrangement of a valve unit with block-bleed-block valves is provided, the assembly module has an actuator suitable and intended for operating the individual valves. The assembly module preferably has a head section that is operatively connected to an actuator. Each check valve has a piston rod. The head section has a U-shaped configuration, with a spring provided in each free leg of the U-shaped head section, which interacts with the corresponding piston rod of the valve. The spring forces are selected such that, depending on the movement of the head section, one valve is closed first, followed by the second. The bridge can be moved against a spring force.

[0026] The mounting module is preferably designed such that it has a support that engages an underside of the valve unit. The mounting module preferably has a pivotable bracket that can be positively connected to the valve unit. The valve unit according to the invention for a milking system for milking milk-producing animals comprises a first valve with an inlet nozzle and a second valve with an outlet nozzle. An outlet of the first valve and an inlet of the second valve form a channel. The valve unit further has a drain valve that has a reciprocating valve body. In a closed position, the valve body of the drain valve closes a passage connecting the channel to a free space. In an open position of the drain valve, the valve body opens the passage. The free space is fluidly connected to at least one connection.

[0027] According to a further aspect of the invention, the valve unit comprises a first valve with an inlet port and a second valve with an outlet port. An outlet of the first valve and an inlet of the second valve form a channel. The valve unit further comprises a drain valve having a reciprocating valve body. In a closed position, the valve body of the drain valve closes a passage connecting the channel to a free space. In an open position of the drain valve, the valve body opens the passage. The free space is fluidly connected to at least one port.

[0028] This inventive design of the valve unit creates the possibility of cleaning the channel that connects the first valve and the second valve. A cleaning fluid can flow through the at least one connection into the free space of the drain valve and from there into the channel. This way, cleaning of the channel is achieved. It is possible for the fluid that is present in the channel and the fluid that is introduced into the free space to also be drawn off via this one connection. If necessary, appropriate ventilation is provided, through which the fluid or fluids flow out or out. A design in which two connections are provided that are fluidically connected to the free space.The connections are preferably arranged opposite one another, so that an inlet for a fluid is created via one connection and an outlet for a fluid is created via the other connection.

[0029] A free space is a space through which air can flow freely, particularly when the drain valve is in an open position. A free space can be created, for example, by providing grooves in an inner circumferential surface of the drain valve, which forms a space for receiving the valve body. To simplify the design and reduce the technical effort required to create a drain valve, particularly when the drain valve is made of a plastic, it is proposed that the free space be annular in cross-section. This means that the valve body has a circular cross-section, at least in one section viewed in the axial direction of the valve body. The valve body can, for example, be frustoconical, so that an edge of the frustoconical valve body closes the passage in the closed position.The space in which the valve body is located preferably has a circular cross-section.

[0030] The passage has a valve seat that interacts with the valve body. The valve body can have a seal that is arranged on the valve body and detachably connected to it. This simplifies the replacement of the seal. This is necessary at specified intervals to meet hygienic requirements. The seal is preferably an O-ring seal. This O-ring seal rests against the valve seat in the closed position.

[0031] According to a further preferred embodiment of the valve unit, it is proposed that the valve body has a seal that seals the free space from the environment. This ensures, in particular, that if the drain valve leaks from the channel, a fluid flows into the environment. It is also possible to clean the free space when the drain valve is closed.

[0032] The valve unit preferably comprises a first valve with an inlet port, a second valve with an outlet port, wherein an outlet of the first valve and an inlet of the second valve form a channel, and a drain valve having a reciprocating valve body which, in a closed position, closes a passage connecting the channel to a free space and, in an open position, opens the passage, wherein the free space is fluidically connected to at least one connection. The free space is preferably annular in cross-section.

[0033] In particular, it is proposed that the passage have a valve seat that interacts with the valve body. The valve body preferably has a sealing element that rests against the valve seat in the closed position. A particularly preferred embodiment is one in which the valve body has a seal that seals the free space from the environment.

[0034] The drain valve is preferably designed so that in an open position the valve body releases the space to the atmosphere.

[0035] The valve unit is preferably designed such that the free space is fluidically connected to two connections that are arranged opposite one another.

[0036] The invention is explained in more detail below with reference to the figures. The figures show a particularly preferred embodiment, to which the invention is not limited, however. The figures and the proportions depicted therein are merely schematic. They show:

[0037] Further advantages and details are explained in more detail using the embodiments shown in the figures.

[0038] They show:

[0039] Fig. 1 shows a device in a perspective view,

[0040] Fig. 2 the device according to Fig. 1 in a front view,

[0041] Fig. 3 the device according to Fig. 1 in a side view,

[0042] Fig. 4 the device according to Fig. 1 in a sectional view,

[0043] Fig. 5 the device according to Fig. 1 in a perspective view,

[0044] Fig. 6 the device according to Fig. 1 with a stationary valve unit and detached assembly module in a perspective view,

[0045] Fig. 7 the device according to Fig. 6 in a side view,

[0046] Fig. 8 shows a further embodiment of the device in a perspective view, Fig. 9 shows a valve unit of the device according to Fig. 8 in a perspective view,

[0047] Fig.10 the valve unit according to Fig 9. partially disassembled

[0048] Fig. 11 shows a further embodiment of the device according to Fig. 8 in a sectional view,

[0049] Fig. 12 the further device according to Fig. 8 with an assembly module and detached valve unit in a perspective view,

[0050] Fig. 13 a detail of the further device according to Fig. 8

[0051] Fig. 14 shows yet another embodiment of a valve unit in a front view,

[0052] Fig. 15 the valve unit according to Fig. 14 in a perspective view,

[0053] Fig. 16 is a sectional view along the section line HH according to Fig. 14,

[0054] Fig. 17 the valve unit according to Fig. 14 with offset inlet and outlet nozzles,

[0055] Fig. 18 is a sectional view along section line 11 of Fig. 17,

[0056] Fig. 19 the valve unit according to Fig. 14 in a side view with an actuating unit in an operating position

[0057] Fig. 20 is a sectional view along the section line EE according to Fig. 19,

[0058] Fig. 21 the valve unit according to Fig. 14 in a side view in another

[0059] operating position,

[0060] Fig. 22 is a sectional view along the section line FF according to Fig. 21,

[0061] Fig. 23 the valve unit according to Fig. 16 in a further operating position,

[0062] Fig. 24 is a sectional view along the section line GG according to Fig. 23,

[0063] Fig. 25 the valve unit with an actuating unit and

[0064] Fig. 26 Actuating unit according to Fig. 25 in a perspective view. Fig. 1 shows a device 1 in a perspective view. The device 1 comprises a valve unit 2, an actuator 3, and an assembly module 4.

[0065] The valve unit 2 has a housing body 5. The housing body 5 has an inlet nozzle 6 and an outlet nozzle 7. The inlet nozzle 6 is detachably connected to a section 9a of a milk-carrying line via a clamp connection 8a. The outlet nozzle 7 is connected to a section 9b of the milk-carrying line via a detachable clamp connection 8b.

[0066] A housing cover 10 is detachably connected to the housing body 5. The housing cover 10 is cap-shaped. A preferred embodiment is one in which the connection between the housing body 5 and the housing cover 10 is formed as a detachable screw connection.

[0067] The mounting module 4 has a mounting plate 15. In the illustrated embodiment, the mounting plate 15 has openings 16a, 16b, by means of which the mounting plate 15 can be secured to a support structure (not shown). The mounting plate 15 has a carrier 17 on which the actuator 3 is fastened. On the side of the carrier 17 opposite the actuator 3, a guide 19 is provided. The guide 19 has two tabs 19a, 19b that are arranged at a distance from one another. A driver 14 is guided between the tabs 19a, 19b of the guide 19. The driver 14 is connected to the actuator 3 via a coupling member 20, which extends through a through-opening 18 in the carrier 17.

[0068] The actuator 3 is preferably designed as a piston-cylinder unit. This is preferably a pneumatic piston-cylinder unit. The actuator 3 is connected to a controller (not shown), so that the actuator 3 can be activated or deactivated depending on the control signals.

[0069] The actuator 3 and the assembly module 4 together form a separate structural unit which is detachably connected to the valve unit 2 in a form-fitting manner.

[0070] Fig. 4 shows the device 1 according to Fig. 1 in a sectional view. The housing body 5 has an external thread 26. A union nut 25 with a rim is screwed onto the external thread 26, so that the housing cover 10 is firmly connected to the housing body 5 with the interposition of the diaphragm seal 13.

[0071] From the sectional view according to Fig. 4, it can be seen that the valve unit 2 is formed by a valve with a movable piston 12. The movable piston 12 of the valve unit 2 has a piston shaft 11. The piston shaft 11 is formed in two parts. It has a first section 11.1 and a second section 11.2. The first section 11.1 and the second section 11.2 are detachably connected to one another. The connection is preferably a positive and / or non-positive connection, in particular a screw connection.

[0072] The piston shaft 11 extends through the diaphragm seal 13. The diaphragm seal 13, the first section 11.1, and the second section 11.2 are configured such that the diaphragm seal 13 is arranged between the first section 11.1 and the second section 11.2 and is secured thereby. The diaphragm seal 13 has a bead-like peripheral edge region, which is positioned sealingly between the housing body 5 and the housing cover 10.

[0073] The movable piston 12 has at one end a closure body 12.1 through which an outlet 12.2 of the valve unit 2 can be closed or opened.

[0074] In the operating position shown in Fig. 4, the outlet 12.2 of the valve unit 2 is closed by the closure body 12.1, so that there is no fluidic connection between the inlet port 6 and the outlet port 7. The movable piston 12 can be moved into an open position by means of the actuator 3, so that a fluidic connection is established between the inlet port 6 and the outlet port 7.

[0075] The second section 11.2 of the piston shaft 12 extends through the housing cover 10 and is detachably connected to the driver 14. In particular, it can be seen from Fig. 4 that the coupling member 20 and the piston shaft 11 lie on a common axis. The second section 11.2 of the piston shaft 11 has two spaced-apart, radially outwardly directed ribs 21a, 21b. The ribs 21a, 21b are preferably annular. The driver 14 has corresponding recesses 22a, 22b, which are adapted to the contour of the ribs 21a, 21b. The driver 14 is thus positively connected to the piston 12 of the valve unit 2.

[0076] In particular, the assembly module 4 can be seen in Fig. 5. The assembly module and the valve unit are geometrically coordinated with one another such that the assembly module and the valve unit can be connected in a predetermined, predefined position. The connection between the valve unit and the assembly module is preferably a positive connection. It can, in particular, be designed as a snap-in connection. For this purpose, the assembly module preferably has corresponding snap-in projections that engage with correspondingly designed stops on the valve unit, or vice versa.

[0077] In the preferred embodiment, the mounting module 4 has two tabs 23a, 23b spaced apart from one another. Each tab 23a, 23b has a recess 24a or 24b. In the assembled state, i.e. in the state in which the valve unit 2 is connected to the mounting module 4, an edge of the recess 24a partially surrounds the inlet nozzle 6. An edge of the recess 24b partially surrounds the outlet nozzle 7. The recesses 24a, 24b also form stop surfaces that serve to position the mounting module. The illustration also shows a web 27, which is part of the mounting module 4. The web 27 is preferably spring-elastic. A free end region of the web 27 rests against the housing body 10 of the valve unit 2 when the device is in the assembled state. Preferably, the web 27 is connected to the valve unit 2 in a locking manner.

[0078] Figs. 1-4 show the device in the assembled state, meaning that the valve unit 2 is connected to the milk line 9. Furthermore, the valve unit 2 is operatively connected to the actuator 3, which forms a separate unit with the assembly module 4.

[0079] Fig. 5 shows the device 1 and sections 9a, 9b of a milk-carrying line in a perspective view, wherein the device 1 is not connected to the milk-carrying line.

[0080] The valve unit 2, with its housing body 5, which has the inlet connection 6 and the outlet connection 7, is arranged between the ends of the sections 9a, 9b of the milk-carrying line. The valve unit 2 is connected in a fluid-tight manner to the sections 9a, 9b of the milk-carrying line by means of the clamp connections 8a, 8b. Arrow A indicates the mounting direction of the assembly module 4 with the actuator 3 arranged on the assembly module.

[0081] During assembly, the tabs 23a engage around a section of the inlet connection 6. The tabs 23b engage around a section of the outlet connection 7. The ribs 21a, 21b of the piston shaft 11, which are directed radially outward toward each other, slide into the recesses 22a, 22b. The actuator 3 is positively connected to the piston 12 of the valve unit 2.

[0082] Fig. 4 shows an operating position in which the valve unit 2 is closed, so that there is no fluidic connection between the inlet port 5 and the outlet port 7. By activating the actuator 3, the piston 12, which is connected to the actuator 3 via the shaft 15, the driver 14, and the coupling member 20, can be transferred into an operating position in which a fluidic connection is established between the inlet port 5 and the outlet port 7.

[0083] The mounting module allows the mounting module to be connected and disconnected from the valve unit. If the valve unit is attached to the milk line, the mounting module is separated from the valve unit as a separate unit.

[0084] 6 and 7 show an embodiment in which the diaphragm seal 13 is preferably to be replaced. For this purpose, the assembly module 4 is detached from the valve unit 2. In this variant, the valve unit 2 remains connected to the milk-carrying line with sections 9a, 9b. By loosening the connection between the housing body 5 and the housing cover 6, the housing cover 6 can be removed. The housing body 5 has an external thread 26. A union nut 25 with a rim is screwed onto the external thread 26, so that the housing cover 10 is firmly connected to the housing body 5 with the diaphragm seal 13 interposed. By loosening the union nut 25, the housing cover 10 can be separated from the housing body 5. The first section 11.1 and the second section 11.2 of the piston shaft 11 are separated from one another. The diaphragm seal 13 is then released and can be replaced with another diaphragm seal.If the piston 12 has a seal, this can be replaced if necessary.

[0085] The mounting module allows the valve unit to be connected and disconnected from the mounting module. If the mounting module is attached to a structure, the valve unit can be detached from the sections of the milk line and separated from the mounting module by loosening the clamp connections.

[0086] Due to the preferred design of the piston shaft 11 and the driver 14, the piston shaft 11 can be separated from the driver 14. The assembly and disassembly direction of the valve unit runs essentially perpendicular to the longitudinal axis of the piston rod 11 and the driver 14.

[0087] Assembly is carried out in reverse order. The position of the valve unit 2 is also defined by the recesses 24a, 24b. During assembly, the drivers 21a, 21b of the piston shaft 11 slide into the driver 14.

[0088] The structural design of the device reduces the complexity of the device. In particular, this structural design makes it easier to carry out maintenance work on the valve unit. If the valve unit and the assembly module are separated from one another, replacing seals can be made easier. This also reduces the service time required to replace, for example, a diaphragm seal and, if necessary, the diaphragm seal with the piston. A further advantage is that in the event of a malfunction of an actuator included in the actuation unit, the assembly module can be replaced along with the actuator.

[0089] A further embodiment of a device according to the invention is shown in Figs. 8-13.

[0090] Fig. 8 shows a device 1 with a valve unit 2 for a milking system for milking dairy animals in a perspective view. The valve unit 2 comprises a first valve 30. The first valve 30 has an inlet nozzle 31 which is connected to a section 9a of a milk-carrying line via a clamp connection 8a. A second valve 50 is provided. The second valve 50 has an outlet nozzle 51 which is connected to a section 9b of a milk-carrying line via a clamp connection 8b. The valve unit 2 with the first valve 30 and the second valve 50 is shown in Figs. 9 and 10. Fig. 9 shows the first valve 30 and the second valve 50 in the assembled state. The first valve 30 and the second valve 70 are connected to one another via a housing part 70 in the illustrated embodiment.

[0091] The first valve 30 comprises a housing 32. In the preferred embodiment, the housing 32 of the first valve 30 is formed in several parts. The housing 32 has a housing body 33. The housing body 33 has the inlet connection 31. The housing body 33 is detachably connected to a housing cover 34. A first piston shaft 35 extends from the housing cover 34.

[0092] The second valve 50 is constructed in a corresponding manner. The second valve 50 has an outlet nozzle 51 formed on the housing body 53 of a housing 52. The housing body 53 is detachably connected to a housing cover 54. A second piston shaft 55 of the second valve 50 extends through the housing cover 54. The outlet nozzle 51 is connected to a section 9b of a milk-carrying line via a clamp connection 8b.

[0093] The housing covers 34 and 54 are designed as separate components. These can preferably form a one-piece unit.

[0094] A radially outward-facing collar 36 is provided on the outer surface of the housing cover 34. A union nut 37 surrounds the housing cover 34. The second valve 50 also has a collar 56 on its housing cover 54, which is directed radially outward. A union nut 57 surrounds the housing cover 54.

[0095] The housing body 33 has a threaded portion 38 adjacent to the housing cover 34. The second valve 50 has a housing body 53 with a threaded portion 58 adjacent to the housing cover 54.

[0096] A housing part 70 is provided, which is connected to the housing body 33 of the first valve 30 and to the housing body 54 of the second valve 50. The housing part 70 has a drain valve. A valve body 76 of the drain valve is shown in Fig. 10.

[0097] Fig. 11 shows the device 1 according to Fig. 8 in a sectional view. From the sectional view according to Fig. 11, it can be seen that the first valve 30 has a first movable piston 39. The first movable piston 39 of the first valve 30 has a first piston shaft 35. The first piston shaft 35 is formed in two parts. It has a first section 35.1 and a second section 35.2. The first section 35.1 and the second section 35.2 are detachably connected to one another. The connection is preferably a positive and / or non-positive connection, in particular a screw connection. The first piston shaft 35 extends through a diaphragm seal 44. The diaphragm seal 44, the first section 35.1 and the second section 35.2 are designed such that the diaphragm seal 44 is arranged between the first section 35.1 and the second section 35.2 and is fixed thereby to the first piston shaft 35.The diaphragm seal 44 has a bead-like circumferential edge region which is positioned sealingly between the housing body 33 and the valve cover 34.

[0098] The first movable piston 39 has at one end a closure body 40 through which an outlet 41 of the first valve 30 can be closed or opened.

[0099] In the operating position shown in Fig. 11, the outlet 41 of the first valve 30 is closed by the closure body 40, so that there is no fluidic connection between the inlet port 31 and the outlet 41. The first movable piston 39 can be moved into an open position, so that a fluidic connection is established between the inlet port 31 and the outlet 41.

[0100] Fig. 11 shows that the second valve 50 has a second movable piston 59. The second movable piston 59 has the second piston shaft 55, which comprises two sections, a first 55.1 and a second 55.2. The shaft sections 55.1 and 55.2 are detachably connected to one another. Preferably, the shaft sections 55.1 and 55.2 are screwed together. The second movable piston 59 has a closure body 60. The closure body 60 of the second valve 50 closes - in the illustration according to Fig. 11 - an inlet 51, so that there is no fluidic connection between the inlet 61 and the outlet connection 51. The second piston shaft 55 extends through a diaphragm seal 54. The diaphragm seal 54 and the first section 55.1 and the second section 55.2 are designed such that the diaphragm seal 54 is between the first section 55.1 and the second section 55.2 and is secured thereby to the second piston shaft 55. The diaphragm seal 54 has a bead-like circumferential edge region, which is positioned sealingly between the housing body 53 and the housing cover 54.

[0101] The housing part 70 has a channel 71 that connects the outlet 41 of the first valve 30 to the inlet 61 of the second valve 50. The channel 70 can be closed or opened by means of the drain valve 75 shown in Fig. 11.

[0102] The drain valve 75 has a valve body 76. The valve body 76 is connected to an actuating unit so that this valve body 76 can be moved from an open position to a closed position and vice versa. Figure 11 shows the open position of the valve body 76. The valve body 76 is essentially circular in cross-section.

[0103] If the drain valve 75 is in an open position, this means that the channel 71 is fluidly connected to the surrounding atmosphere, and the first valve 30 and the second valve 50 are closed. In this operating position of the valves, the fluid in the channel, in particular milk, can flow out of the channel 71.

[0104] The first valve 30, the second valve 50, and the drain valve 75 form a valve unit, also known as a block-bleed-block unit. In the position shown in Fig. 11, the first valve 30 and the second valve 50 are closed, meaning these valves 30 and 50 are each in a block position. The drain valve 75 is in an open position, meaning it is in a bleed position.

[0105] Figures 8 to 13 show the valve unit 2 comprising the first 30 and second 50 valves as well as the drain valve 75 in conjunction with an assembly module 4. In the preferred embodiment, the assembly module 4 has an actuator 3. The actuator 3 actuates the first 30 and second 50 valves as well as the drain valve 75 via an actuation unit 80. The assembly module 4 with the actuation unit 80 form a structural unit. The valve unit and the structural unit together form the device.

[0106] The valve unit 2 is preferably designed as a block-bleed-block valve unit. The valve unit 2 can be switched such that, in a first position, both the first valve 30 and the second valve 50 are open and the drain valve 75 is closed. In a second position, which can also be referred to as the blocking position, the first valve 30 and the second valve 50 are closed and the drain valve 75 is open.

[0107] The actuator 3 is preferably designed as a piston-cylinder unit. This is, in particular, a pneumatic piston-cylinder unit, the connections of which are not shown. The actuator 3 is connected to a controller (not shown), so that the actuator 3 is activated or deactivated depending on the control signals. The actuator 3 is fixedly mounted on the mounting plate 15.

[0108] The actuating unit 80 comprises a head part 81. The head part 81 has a first leg 81.1 and a second leg 81.2, which are connected to one another via a support plate 81.3. The head part 81 is preferably formed in one piece. The support plate 81.3 has a through-opening through which the rod 43 of the actuator 3 extends. Fig. 11 shows that the rod 45 has a collar 46 on which the support plate 81.3 rests.

[0109] A bracket 82 is connected to the mounting plate 15. The bracket 82 comprises two claw-like tabs 83.1, 83.2, which partially encompass the first and second legs 81.1, 81.2. The tabs 83.1, 83.2 and the legs 81.1, 81.2 are designed such that the head part 80 can slide in the bracket 82 in the longitudinal direction of the tabs 83.1, 83.2.

[0110] The first leg 81.1 of the head part 81 has a first groove 84.1 extending in the longitudinal direction of the first leg 81.1, which extends from the free end of the first leg over a portion of the longitudinal extent of the first leg 81.1. A first abutment 85.1 is provided at the free end of the first leg 81.1, directed radially inward into the first groove 84.1. The first groove 84.1 extends in the longitudinal direction of the first leg 81.1 into a first threaded bore 86.1. A first adjusting screw 87.1 is screwed into the first threaded bore 86.1.

[0111] The second leg 81.2 of the head part 81 has a second groove 84.2 extending in the longitudinal direction of the second leg 81.2, which extends from the free end of the second leg over a portion of the longitudinal extent of the second leg 81.2. A second abutment 85.2 is provided at the free end of the second leg 81.2, directed radially inward into the second groove 84.2. The second groove 84.2 merges into a second threaded bore 86.2 in the longitudinal direction of the second leg 81.2. A second adjusting screw 87.2 is screwed into the second threaded bore 86.2.

[0112] The first groove 84.1 is open toward the first piston shaft 35 of the first valve 30, so that the first piston shaft 35 can be inserted into the first groove 84.2. In the assembled state, as shown in Figures 8 and 9, the first piston shaft, in particular the second section 35.2 of the first piston shaft 35 of the first valve 30, projects into the first groove 84.1. The second section 35.2 of the first piston shaft 35 has a first radially outwardly directed rib 65. The first rib

[0113] 65.1 is preferably annular. The shape of the rib 65.1 is adapted to the inner contour of the first groove 84.1. In the assembled state, the first rib lies

[0114] 65.1 preferably on the first abutment 85.1. Preferably, between the free end region of the first piston shaft 35 and the first adjusting screw

[0115] 87.1 a first spring element 88.1, in particular a compression spring, is provided.

[0116] The second groove 84.2 is open toward the second piston shaft 55 of the second valve 50, so that the second piston shaft 55 can be inserted into the second groove 84.2. In the assembled state, as shown in Figures 8 and 9, the second piston shaft 55, in particular the second section 55.2 of the second piston shaft 55 of the second valve 50, projects into the second groove 84.2. The second section

[0117] 55.2 of the second piston shaft 55 has a second radially outwardly directed rib 65. The second rib 65.2 is preferably annular. The shape of the second rib 65 is adapted to the inner contour of the second groove 84.2. In the assembled state, as can be seen from Fig. 8 or 9, the second rib 65 rests on the second abutment 81.2. A second spring element 88.2, in particular a compression spring, is preferably provided between the free end region of the second piston shaft 55 and the second adjusting screw 87.2.

[0118] The actuating unit has a transmission member 90. The bleed valve 75 of the valve unit 1 is actuated by the transmission member 90. The transmission member 90 is preferably U-shaped. It has a first and a second leg 91.1, 91.2, which are spaced apart and arranged parallel to one another. The legs 91.1, 91.2 are connected to one another via a base 91.3. The first leg 91.1 is indirectly connected to the actuator 3. Preferably, the indirect connection is established by a spring element. Particularly preferably, a compression spring 92 is provided, which is supported on the support plate 81.3 and exerts a compressive force on the first leg 91.1. and the support plate 81.3. Preferably, the preload of the compression spring 92 can be adjusted. For this purpose, a threaded rod 43 is provided which extends in the axial direction of the rod 43 of the actuator and is connected to it.The threaded rod extends through the first leg 91.1. A nut resting on the first leg 91.1 can be screwed onto the free end portion of the threaded rod 43.

[0119] The drain valve 75 preferably has a cylindrical closure body 76. One end of the closure body 76 is releasably connected to the second leg 91.2. The closure body 76 preferably has a threaded pin 77 extending in the axial direction of the closure body 96. The second leg 91.2 has a slot 78 through which the threaded pin 77 extends. A nut 79 is screwed to the threaded pin 77, so that the closure body 76 is releasably secured to the second leg 91.2.

[0120] For releasably securing the valve unit 2 to the mounting module, a pivotable bracket 48 is provided, as shown in Fig. 12. The pivotable bracket can be connected to the valve unit 2 in a locking manner. Fig. 8 shows the bracket in the connected position. This releasably connects the mounting module to the valve unit.

[0121] To detach the assembly module from the valve unit or the valve unit from the assembly module, the screw connection connecting the closure body 76 of the drain valve 75 to the second leg 91.2 of the transmission element 90 is loosened. The pivoting bracket is detached from the valve unit, as shown in Fig. 12. The valve unit 2 can be removed from the assembly module 4. Service work can be performed on the valve unit.

[0122] Fig. 11 shows an operating state in which the first valve 30 and the second valve 50 are closed. The drain valve 75 is open. If the actuator 3 is actuated, i.e., if the rod of the actuator 3 moves vertically upward in the orientation of the valve unit 2 shown in Fig. 11, the head part 81 is moved upward. During this movement, the transmission member 90 is also displaced vertically upward, whereby the closure body of the drain valve 76 closes the channel. Upon further actuation of the actuator, the compression spring is compressed, so that the closure body of the drain valve 76 remains in the closed position. Only after a predetermined travel distance has been reached does the first abutment 85.1 come into contact with 46.1 of the first piston shaft 35. The second abutment 85.2 comes into contact with 46.2 of the second piston shaft 55.A continuation of the upward movement of the head part 81 causes the first piston shaft 35 and the second piston shaft 55 to be driven along, whereby the first valve 30 and the second valve 55 are moved into an open position.

[0123] Fig. 14 shows a further embodiment of a valve unit 100 for a milking system for milking dairy animals in a front view. The valve unit 100 comprises a first valve 110. The first valve 110 has an inlet nozzle

[0124] 111, which can be connected to a milking system line (not shown).

[0125] The first valve 110 comprises a housing 112. In the preferred embodiment, the housing 112 of the first valve 110 is formed in several parts. The housing

[0126] 112 has a housing body 113. The housing body 113 has the inlet connection 111. The housing body 113 is detachably connected to a housing cover 114. A first piston shaft 115 extends from the housing cover 114.

[0127] The second valve 140 is also constructed in a corresponding manner. The second valve 140 has an outlet port 141 formed on the housing body 143 of a housing 142. The housing body 143 is detachably connected to a housing cover 144. A second piston shaft 145 of the second valve 140 extends through the housing cover 144.

[0128] The housing covers 114 and 144 can be designed as separate components. In particular, it can be seen from Fig. 7 that the housing covers 114 and 144 form a one-piece unit.

[0129] A radially outwardly directed collar 116 is provided on the outer surface of the housing cover 114. The second valve 140 also has a radially outwardly directed collar 146 on its housing cover 144.

[0130] The housing body 113 has a groove 117 at an end region opposite the housing cover 114. The second valve 140 has a housing body 143 with a groove 147 formed opposite the housing cover 144.

[0131] A housing part 200 is provided, which is connected to the housing cover 114 of the first valve 110 on the housing body 113 at the end region opposite the housing cover 114, as well as to the end region of the housing body 143 of the second valve 140 opposite the housing cover 144. The housing part 200 has a connecting means 201. The connecting means 201 is preferably designed in the form of a threaded bore. In the preferred embodiment, the threaded bore of the connecting means 201 is screwed into a threaded rod 202. The threaded rod

[0132] 202 extends from the connecting means 201 in the direction of the housing covers 114, 144. A first clamping element 203 is fixed to the threaded rod 202.

[0133] The first clamping element 203 is designed such that an edge region of the first clamping element 203 protrudes into the groove 117 of the first valve 110 and another edge region of the first clamping element 203 protrudes into the groove 147 of the second valve 140. This design achieves a positive and non-positive connection between the first clamping element 203 and the housing body 113 of the first valve 110 and the housing body 143 of the second valve 140.

[0134] From the illustration, in particular from Fig. 15, it can be seen that a nut 204 is screwed onto the threaded rod 203 and on the first clamping element

[0135] 203. By turning the nut, the distance between the first clamping element 203 and the connecting means 201 can be changed, so that a force-locking connection between the housing part 200 and the housing body

[0136] 113 of the first valve 110 and the housing body 143 of the second valve 140.

[0137] Fig. 14 and 15 show a second clamping element 205. The threaded rod 202 extends through the second clamping element 205. The second clamping element 205 has a first edge region which is mounted on the collar 116 of the housing cover

[0138] 114 of the first valve 110. The second clamping element 205 has a second edge region that rests on the collar 146 of the second valve 140. A nut 206 is provided to secure the second clamping element 205. The nut 206 can apply a force to the second clamping element 205, which acts on the housing covers 114 and 144, so that the housing cover 114 of the first valve 110 is connected to the housing body 113 of the first valve 110. The same applies to the housing cover 144 and the housing body 143 of the second valve 140.

[0139] The above-described fixing or connection of the housing part 200 to the housing bodies 113, 143 and the housing covers 114, 144 is illustrated in Fig. 14 in a front view of the valve unit 100. A corresponding configuration is also preferably provided on the rear side of the valve unit, as partially evident from the sectional view of Fig. 3.

[0140] In particular, it can be seen from Figs. 15 and 16 that the groove 117 or 147 is delimited by a radially outwardly directed rib 118 or 148, respectively, wherein the respective rib 118, 148 is part of the housing body 113 or 143. In particular, it can be seen from Fig. 16 that the rib 118 and the rib 148 each have a toothing 119 or 149, respectively.

[0141] Preferably, the housing part 200 has a corresponding configuration to the respective toothing 119, 149, in particular at least one cam 211.1, 211.2. The cam 211.1 engages between the teeth of the toothing 119, with the cam 211.2 engaging between the teeth of the toothing 149. From Fig. 16, it can be seen that the housing bodies 113 and 143 are arranged such that the longitudinal axes of the inlet connection 111 of the first valve 110 and the outlet connection 141 of the second valve 140 lie on a common straight line A.

[0142] The meshing toothing makes it possible, during assembly of the valve unit, to align the housing bodies 113 and 143 in such a way that a possible angular offset of a section of a milk line connected to the inlet nozzle 111 and a section of the milk line connected to the outlet nozzle 141 can be compensated. An "angled" arrangement of an inlet nozzle 111 and an outlet nozzle 141 is shown in Figs. 4 and 5. From Fig. 5, it can be seen that the inlet nozzle 111 is offset by the angle B relative to the outlet nozzle 141.

[0143] In another embodiment not shown, the housing bodies 113 and 143 are arranged relative to one another such that the teeth 119 and 149 of the housing bodies 113 and 143 mesh with one another.

[0144] Fig. 19 shows a sectional view along section line EE of Fig. 20. From the sectional view of Fig. 7, it can be seen that the first valve 110 has a first movable piston 120. The first movable piston 120 of the first valve 110 has a first piston shaft 115. The first piston shaft 115 is formed in two parts. It has a first section 115.1 and a second section 115.2. The first section 115.1 and the second section 115.2 are detachably connected to one another. The connection is preferably a positive and / or non-positive connection, in particular a screw connection. The first piston shaft 115 extends through a diaphragm seal 124. The diaphragm seal 124 and the first section 115.1 and the second section 115.2 are designed such that the diaphragm seal 124 is between the first section 115.1 and the second section 115.2 and is secured thereby to the first piston shaft 115. The diaphragm seal 124 has a bead-like circumferential edge region, which is sealingly positioned between the housing body 113 and the valve cover 114. The first movable piston 120 has a closure body 122 at one end, by means of which an outlet 123 of the first valve 110 can be closed or opened.

[0145] In the operating position shown in Fig. 20, the outlet 123 of the first valve 110 is closed by the closure body 122, so that there is no fluidic connection between the inlet port 111 and the outlet 123. The first movable piston 120 can be moved into an open position, as shown in Fig. 24, so that a fluidic connection is established between the inlet port 111 and the outlet 123.

[0146] Fig. 20 shows that the second valve 140 has a second movable piston 150. The second movable piston 150 has the second piston shaft 145, which comprises two sections, a first 145.1 and a second 145.2. The shaft sections 145.1 and 145.2 are detachably connected to one another. Preferably, the shaft sections 145.1 and 145.2 are screwed together. The second movable piston 150 has a closure body 152. The closure body 152 of the second valve 140 closes—in the illustration according to Fig. 20—an inlet 153, so that there is no fluidic connection between the inlet 153 and the outlet connection 141.

[0147] The second piston shaft 145 extends through a diaphragm seal 154. The diaphragm seal 154 and the first section 145.1 and the second section 145.2 are configured such that the diaphragm seal 154 is arranged between the first section 145.1 and the second section 145.2 and is secured thereby to the second piston shaft 145. The diaphragm seal 154 has a bead-like circumferential edge region, which is sealingly positioned between the housing body 143 and the housing cover 144.

[0148] The housing 200 has a channel 160 that connects the outlet 123 of the first valve 110 to the inlet 153 of the second valve 140. The channel 160 has a passage 161. The passage 161 has a valve seat 162. The passage 161 can be closed or opened by means of the drain valve 180 shown in Fig. 20. The drain valve 180 has a valve body 181. The valve body 181 is connected to an actuating unit so that this valve body 181 can be moved from an open position to a closed position and vice versa. Fig. 7 shows the open position of the valve body 181. The valve body 181 is essentially circular in cross-section. At its free end, it has a sealing element 182 that interacts with the valve seat 162. From Fig. 20 it can be seen that a free space 183 surrounds the valve body 181.In the open position of the valve body 181, there is a fluidic connection between the channel 160 and the free space 183. If the valve body 181 is moved into the position shown in Figs. 22 to 24, the fluidic connection between the channel 160 and the free space 183 is interrupted.

[0149] Returning to Figs. 14 to 18, it can be seen that the housing part 200, which also houses the drain valve 180, has a first connection 190 and a second connection 191. The connections 190, 191 are fluidly connected to the free space 183. The connections 190, 191 are preferably arranged diametrically, i.e., offset by 180° in the circumferential direction of the free space 183. A fluid can flow into the free space 183 through the connection 190 and out through the second connection 191.

[0150] From the illustration in Fig. 20 it can be seen that in the open position of the drain valve 180 a free space 183 is preferably connected to the atmosphere.

[0151] The inventive design of the valve unit allows several possibilities for carrying out cleaning depending on the position of the first, the second valve and / or the drain valve.

[0152] If the drain valve 180 is in a closed position, which means that the passage 161 to the channel 160 is closed, the free space 183 can be cleaned by introducing a cleaning fluid into the free space via one connection and discharging it via the other connection.

[0153] If the drain valve 180 is in an open position, meaning that the channel 160 is fluidly connected to the free space 183, and the first valve 110 and the second valve 140 are closed, the fluid in the channel, in particular milk, can be drained via one connection 190 or the other 191. In such an operating position of the valves, the channel 160 and the free space 183 can be cleaned by introducing a cleaning fluid into the free space 183 via one connection 190 and discharging it via the other connection 191.

[0154] In a preferred embodiment, a free space 183 can be connected to the atmosphere in the open position of the drain valve 180. In this operating position, the fluid in the channel 160, in particular milk, can be discharged from the drain valve 180.

[0155] The first valve 110, the second valve 140, and the drain valve 180 form a valve unit, also known as a block-bleed-block. In the position shown in Fig. 20, the first valve 110 and the second valve 140 are closed, i.e., they are in a block position. The drain valve 180 is in an open position, i.e., it is in a bleed position.

[0156] In a preferred embodiment, the valve unit can be operated such that in an operating position, which can also be referred to as a transition position, all valves, i.e. the first valve 110, the second valve 140 and the drain valve 180 are closed, as shown in Fig. 22.

[0157] Fig. 24 shows another operating position of the valve unit, in which the first valve 110 and the second valve 140 are open. The drain valve 180 is closed. If a fluid, in particular milk, flows through the inlet port 111 into the first valve 110, the fluid leaves the first valve 110 through the outlet 123 and flows into the channel 160. The fluid flows from the channel 160 through the inlet 153 into the second valve 140 and exits it via the outlet port 141. The flow is indicated by arrows in Fig. 24.

[0158] In this operating position, the drain valve 180 is closed. In particular, it can be seen from Fig. 24 that the valve body 181 has a seal 184 at its end region opposite the sealing element 182. When the drain valve 180 is closed, as shown in Fig. 24, the seal 184 rests against an inner wall of the housing part 200, so that the free space 183 is sealed off from the channel 160 and from the atmosphere. In this operating situation, it is possible to clean, in particular to flush, the free space 183 by connecting a connection 190 to a fluid source, in particular to a water container or the like, so that a fluid, preferably water, flows into the free space 183 through the connection 190 and leaves again via the connection 191.

[0159] Fig. 25 shows a preferred embodiment of a device 300 in perspective view. The device 300 comprises a valve unit 100 in conjunction with an actuating unit 320. The actuating unit 320 also forms an assembly module. The assembly module and the valve unit together form the device.

[0160] The mounting module allows for connection and disconnection of the mounting module from the valve unit. The mounting module can be fixed to a structure. When the device is used in this way, the valve unit is released as a separate unit. It is also possible for the valve unit to remain permanently connected to sections of a milking system line, while the mounting module is separated and removed from the valve unit.

[0161] The structural design of the device reduces its complexity. In particular, this structural design makes it easier to carry out maintenance work on the valve unit. If the assembly module and the valve unit are separated, replacing seals can be simplified. This also means that the service time for replacing, for example, a diaphragm seal and, if necessary, the diaphragm seal with the piston can be reduced. A further advantage is that in the event of a malfunction of an actuator included in the actuation unit, the assembly module can be replaced along with the actuator.

[0162] The assembly module and the valve unit are geometrically coordinated so that the assembly module can be connected to the valve unit in a predetermined, predefined position. The connection between the valve unit and the assembly module is preferably a positive connection. It can, in particular, be designed as a snap-in connection. For this purpose, the assembly module has corresponding snap-in projections that engage with correspondingly designed stops on the valve unit. This will be explained further below.

[0163] When the device 300 is oriented vertically, the actuating unit 320 has an upper mounting plate 322 and a lower mounting plate 324. An actuator 330 is fixedly connected to and between the upper mounting plate 322 and the lower mounting plate 324 (see, for example, Fig. 19). The upper mounting plate 322 has a fastening section 323. In the illustrated embodiment, the lower mounting plate 324 also has a fastening section 325. The fastening sections 323 and 325 preferably lie in a common plane. By means of the fastening sections 323 and 325, the actuating unit 320 can be secured, for example, to a structure not shown, which is preferably a wall or a support.

[0164] The fastening section 323 and the upper mounting plate 322 as well as the fastening section 325 and the lower mounting plate 324 are substantially L-shaped in cross section.

[0165] The actuator 330 is preferably designed as a piston-cylinder unit. This is, in particular, a pneumatic piston-cylinder unit, the connections of which are not shown. The actuator 330 is connected to a controller (not shown), so that the actuator 330 is activated or deactivated depending on the control signals. When the actuator 330 is activated, a rod 332 of the actuator 330 extends out of the cylinder of the actuator 330 (see Fig. 21, 10).

[0166] The free end of the rod 332 of the actuator 330 rests against a head portion 340. The head portion 340 has a support plate 342. The support plate 342 is preferably aligned parallel to the upper mounting plate 322.

[0167] An L-shaped retaining plate 346 is pivotally connected to the support plate 342. The support plate 342 has slots into which the projections of a leg 347 extend. The slots and the legs are coordinated in such a way that they allow a certain degree of pivoting of the retaining plate 346, which will be discussed further below.

[0168] Two guides 350, 352 are preferably connected to the support plate 342. The guides 350, 352 are preferably circular in cross-section. As can be seen from Fig. 13, the guides 350, 352 extend from the support plate 342 through the upper mounting plate 322 and through the lower mounting plate 324.

[0169] A transmission member 360 is provided. The bleed valve 180 of the valve unit 100 is actuated by the transmission member 360. The transmission member 360 is preferably U-shaped. It has a first and a second leg 362, 364, which are spaced apart and arranged parallel to one another. The legs 362, 364 are preferably arranged parallel to the support plate 342. Each leg 362, 364 has through-openings through which the respective guide 350 or 352 extends.

[0170] From the illustration in Figure 26, it can be seen that the lower mounting plate 342 is provided between the first leg 362 and the second leg 364 of the transmission member 360. A first compression spring 370, which surrounds the guide 350, is provided between the first leg 362 and the lower mounting plate 324.

[0171] The guide 350 has an abutment 354, which is arranged in the axial direction of the guide 350 between the retaining plate 346 and the first leg 362. The guide 352 has an abutment 356, which is arranged in the axial direction of the guide 352 between the retaining plate 346 and the second leg 364.

[0172] Preferably, the second guide 352 has a corresponding second compression spring 372. The second compression spring 372 bears against the lower mounting plate 324 and the first leg 362. Preferably, the guides 350, 352 and the transmission member are designed symmetrically, so that tilting is avoided when the transmission member 360 is displaced along the guides 350, 352. A valve body 181 of the bleed valve of the valve unit 100 is provided on the leg 364. Preferably, the valve body 181 is detachably connected to the leg 364 of the transmission member 360.

[0173] In particular, it can be seen from the illustration in Fig. 13 that two spring elements 390, 392 are provided. The spring elements 390, 392 are preferably tension springs. The respective free end of the spring element 390 or 392 is connected to the head part 340, preferably to the retaining plate 346. Specifically, this is achieved, for example, by the retaining plate 346 having a recess with a lug that engages an eyelet of the free end of the spring element.

[0174] The opposite end of the spring element 390 or 392 is connected to the lower mounting plate 324.

[0175] The lower mounting plate 324 has a contour that is adapted to the housing part 200 of the valve unit, so that an end face of the lower mounting plate 324 rests against the housing part 200 when the valve unit 100 is connected to the actuating unit 300. Fig. 26 shows that the lower mounting plate 324 has two spaced-apart, in particular hook-shaped, rear grips 326, 327. The housing part 200 has two spaced-apart pins 207 (Fig. 2) that are essentially vertical in a vertical orientation, i.e., when the piston shafts 115, 145 run vertically. Each pin 207 has two stops 208, 209 spaced apart in the axial direction of the respective pin 207. A radially outwardly directed web 210 is provided between the stops.

[0176] When the valve unit 100 is connected to the actuating unit 320, the rear grips 326, 327 at least partially encompass the respective pin 207. Each rear grip 326, 327 has a recess into which a web 210 of the respective pin 207 engages. In this way, a releasable, positive-locking connection is formed between the housing part 200 and the lower mounting plate 324. The stops 208, 209 determine the vertical position of the housing part 200 and thus also of the valve unit relative to the lower mounting plate 242.

[0177] The upper mounting plate 322 has a contour that is adapted to the housing covers 114, 144 of the valve unit 100, so that an end face of the upper mounting plate 344 partially rests against the respective housing cover 114, 144 when the valve unit 100 is connected to the actuating unit 320. Fig. 13 shows that the upper mounting plate 344 has two spaced-apart, particularly hook-shaped, rear grips 328.

[0178] The housing cover 114 has a first and a second rib 125.1, 125.2. The first rib 125.1 and the second rib 125.2 lie in a common plane and run substantially parallel to the longitudinal axis of the first piston skirt 115. The first rib 125.1 and the second rib 125.2 are spaced apart from one another, so that in the assembled state, the upper mounting plate 322 engages between the first rib 125.1 and the second rib 125.2.

[0179] The housing cover 144 has a first and a second rib 151.1, 151.2. The first rib 151.1 and the second rib 151.2 lie in a common plane and run substantially parallel to the longitudinal axis of the second piston skirt 120. The first rib 151.1 and the second rib 151.2 are spaced apart from one another, so that in the assembled state, the upper mounting plate 322 engages between the first rib and the second rib (see Fig. 20).

[0180] A locking means 380 is provided, which is particularly evident in Fig. 19. The locking means 380 has first and second legs 381, 382, ​​each of which is wedge-shaped. In the assembled state, the first leg 381 rests against the first and second ribs 125.1, 125.2 of the housing cover 114 and extends through the rear recess of the upper mounting plate 322. The same applies to the second leg 328. In the assembled state, the second leg 328 rests against the first and second ribs 151.1, 151.2 of the housing cover 144 and extends through the rear grips of the upper mounting plate 322. The geometric design, in particular of the legs, achieves a positive and non-positive connection between the housing covers 114, 144 and the upper mounting plate 322.

[0181] The first piston shaft 115 of the first valve 110 and the second piston shaft 145 of the second valve 140 extend toward the retaining plate 346. The retaining plate 346 has openings 345.1 and 345.2. A free end portion of the first piston shaft 115 projects into the opening 345.1. Spaced apart from the free end portion of the first piston shaft 115, the first piston shaft 115 has a circumferential stop 127. A free end portion of the second piston shaft 145 of the second valve 140 projects into the opening 345.2. Spaced apart from the free end portion of the second piston shaft 145, the second piston shaft has a circumferential stop 154.

[0182] Fig. 19 and Fig. 20 show the device in an operating state in which the first valve 110 and the second valve 140 are closed and the drain valve 180 is open. In this operating state, the rod 332 of the actuator 330 is at least partially retracted. The support plate 342 is spaced from the stop 127 of the first valve 110 and from the stop 154 ​​of the second valve 140. The holding plate 346 rests against the stop 127 of the first valve 110 and the stop 154 ​​of the second valve 140. For this operating state, the total spring force of the spring elements 390 and 392 is sufficiently high to close the first valve 110 and the second valve 140.

[0183] The spring elements 390 and 392 exert a tensile force on the guides 350 and 352 connected to the retaining plate 346. The abutments 354 and 356 of the guides 350, 352 act on the first leg 362, so that the total spring force of the first and second compression springs 370, 372 is overcome to open the drain valve 180.

[0184] A travel path of the drain valve 180 is preferably selected such that the drain valve 180 is open, allowing cleaning of the drain valve 180, in particular of the free space 183 and the channel 160. In particular, the travel path of the drain valve 180 can alternatively or additionally be selected such that, in the open operating state of the drain valve 180, the free space 160 and the channel are connected to an ambient atmosphere.

[0185] Fig. 21 and Fig. 22 show the device in an operating state in which the first valve 110, the second valve 140, and the drain valve 180 are closed. In this operating state, the rod 332 of the actuator 330 is partially extended. The support plate 342 is spaced apart from the stop 127 of the first valve 110 and from the stop 154 ​​of the second valve 140, wherein the distance in this operating state is smaller than in the operating state in which the first valve 110, the second valve 140, are closed and the drain valve 180 is open. In particular, the travel path of the rod 322 of the actuator corresponds to the travel path of the guides 350, 352 with their abutments 354 and 356. The travel path of the abutments 354 and 356 of the guides 350, 352 causes a relaxation of the compression springs 370, 372, so that the transmission member 360 moves in the axial direction of the guides 350, 352 and the drain valve 180 closes.A period of time during which the valve unit is in this transition position preferably depends on the kinematic conditions and / or a control of the actuator.

[0186] Fig. 23 and Fig. 24 show the device in an operating state in which the first valve 110 and the second valve 140 are open. The drain valve 180 is closed. In this operating state, the rod 332 of the actuator 330 is extended. As the rod 332 extends, the support plate 342 comes into contact with the stop 127 and 154 of the piston 120 of the first valve 110 and the piston 150 of the second valve are extended so far that the valves move into the open state. The guides 350, 352 connected to the support plate 342 are also moved. The travel of the abutments 354, 356 of the guides 350, 352 can cause a further relaxation of the compression springs 370, 372 in order to increase the closing force of the drain valve.

[0187] Preferably, the locking means 380 can be used as a tool. The legs 381 and 382 can be inserted between the support plate 342 and the holding plate 346. By pivoting the locking means 380, the holding plate 346 is pivoted such that the free end portion of the first piston shaft 115 and the free end portion of the second piston shaft 145 exit the openings 345.1 and 345.2, respectively, so that the valve unit is separated from the head part 340. The valve unit can then be separated from the lower mounting plate 324.

[0188] The preferred embodiment of the actuating unit also has the advantage that, in the event of a malfunction of the actuator and / or a control system connected to the actuator, the first valve and the second valve are closed and the drain valve is open. This has the advantage that, viewed in the direction of milk flow, the components of the milking system downstream of the valve unit, e.g., a milk tank, are not contaminated by a fluid, in particular a cleaning fluid.

[0189] 1 device

[0190] 2 valve unit

[0191] 3 Actuator

[0192] 4 Assembly module

[0193] 5 Housing body

[0194] 6 inlet nozzles

[0195] 7 outlet nozzles

[0196] 8a clamp connection

[0197] 8b clamp connection

[0198] 9a Section milk-carrying line

[0199] 9b Section milk-carrying line

[0200] 10 housing cover

[0201] 11 Piston skirt

[0202] 11.1 first section piston skirt

[0203] 11.2 second section piston skirt

[0204] 12 pistons

[0205] 12.1 Locking body

[0206] 12.2 Outlet

[0207] 13 Membrane seal

[0208] 14 drivers

[0209] 15 Mounting plate

[0210] 16a Opening

[0211] 16b Opening

[0212] 17 carriers

[0213] 18 passage opening

[0214] 19 Guide

[0215] 19a tab

[0216] 19b tab

[0217] 20 coupling link

[0218] 21a Rib

[0219] 21b Rib

[0220] 22a Recess 22b Recess

[0221] 23a tab

[0222] 23b tab

[0223] 24a recess

[0224] 24b Recess

[0225] 25 union nut

[0226] 26 external threads

[0227] 27 jetty

[0228] 30 first valve

[0229] 31 inlet nozzle

[0230] 32 housings

[0231] 33 Housing body

[0232] 34 Housing cover

[0233] 35 first piston skirt

[0234] 35.1 first section piston skirt

[0235] 35.2 second section piston skirt

[0236] 36 collars

[0237] 37 union nut

[0238] 38 threaded section

[0239] 39 pistons

[0240] 40 locking bodies

[0241] 41 Outlet

[0242] 44 Membrane seal

[0243] 45 bar

[0244] 46 collar

[0245] 48 brackets

[0246] 50 second valve

[0247] 51 outlet nozzle

[0248] 52 housing

[0249] 53 Housing body

[0250] 54 Housing cover 55 Second piston skirt

[0251] 55.1 first section piston skirt

[0252] 55.2 second section piston skirt

[0253] 54 Membrane seal

[0254] 56 collar

[0255] 57 union nut

[0256] 58 threaded section

[0257] 59 pistons

[0258] 60 locking bodies

[0259] 61 Entrance

[0260] 65.1 Rib

[0261] 65.2 Rib

[0262] 70 Housing part

[0263] 71 channel

[0264] 75 drain valve

[0265] 76 valve bodies

[0266] 77 threaded pin

[0267] 78 slot

[0268] 80 operating unit

[0269] 81 headboard

[0270] 81.1 first leg

[0271] 81.2 second leg

[0272] 81.3 Support plate

[0273] 82 bracket

[0274] 83.1 Tab

[0275] 83.2 Tab

[0276] 84.1 Groove

[0277] 84.2 groove

[0278] 85.1 Abutment

[0279] 85.2 Abutment

[0280] 86.1 Threaded hole 86.2 Threaded hole

[0281] 87.1 Adjusting screw

[0282] 87.2 Adjusting screw

[0283] 90 transmission element

[0284] 91.1 Leg

[0285] 91.2 Leg

[0286] 91.3 Base

[0287] 92 compression spring

[0288] 100 valve unit

[0289] 110 first valve

[0290] 111 Inlet nozzle

[0291] 112 housings

[0292] 113 Housing body

[0293] 114 Housing cover

[0294] 115 first piston skirt

[0295] 115.1 first section piston skirt

[0296] 115.2 second section piston skirt

[0297] 116 collars

[0298] 117 groove

[0299] 118 Rib

[0300] 119 Gearing

[0301] 120 pistons

[0302] 122 breechblock

[0303] 123 Outlet

[0304] 124 Membrane seal

[0305] 125.1 first rib

[0306] 125.2 second rib

[0307] 127 stop 140 second valve

[0308] 141 Outlet nozzle

[0309] 142 housing

[0310] 143 Housing body

[0311] 144 Housing cover

[0312] 145 second piston skirt

[0313] 145.1 first section piston skirt

[0314] 145.2 second section piston skirt

[0315] 146 collar

[0316] 147 groove

[0317] 148 Rib

[0318] 149 Gearing

[0319] 150 pistons

[0320] 151.1 first rib

[0321] 151.2 second rib

[0322] 152 breechblock

[0323] 153 Entrance

[0324] 154 attack

[0325] 160 channel

[0326] 161 passage

[0327] 162 valve seat

[0328] 180 drain valve

[0329] 181 valve body

[0330] 182 Sealing element

[0331] 183 open space

[0332] 190 first connection

[0333] 191 second connection 200 housing part

[0334] 201 lanyards

[0335] 202 threaded rod

[0336] 203 first clamping element

[0337] 204 Mother

[0338] 205 second clamping element

[0339] 206 Mother

[0340] 207 cones

[0341] 208 attack

[0342] 209 attack

[0343] 210 jetty

[0344] 211.1 Cam

[0345] 211.2 Cams

[0346] 300 device

[0347] 320 operating unit

[0348] 322 upper mounting plate

[0349] 323 fastening section

[0350] 324 lower mounting plate

[0351] 325 fastening section

[0352] 326 rear grip

[0353] 327 rear grip

[0354] 330 Actuator

[0355] 332 rod

[0356] 340 headboard

[0357] 342 support plate

[0358] 345.1 Opening

[0359] 345.2 Opening

[0360] 346 retaining plate

[0361] 347 Leg 50 Guide 52 Guide 54 Abutment 56 Abutment 60 Transmission link

[0362] 362 first leg

[0363] 364 second leg

[0364] 370 first compression spring

[0365] 372 second compression spring

[0366] 380 locking devices

[0367] 381 thighs

[0368] 382 thighs

[0369] 390 spring element

[0370] 392 spring element

[0371] A Grade

[0372] B angle

Claims

Claims 1. Device comprising a valve unit (2), an actuator (3), wherein the actuator (3) can be brought into operative connection with the valve unit (1), and a mounting module (4), wherein the mounting module (4) and the actuator (3) together form a separate structural unit which can be connected to the valve unit (2).

2. Device according to claim 1, wherein the valve unit (2) comprises a housing with a housing body (5) which has a passage with an inlet and an outlet, a housing cover (10) which is detachably connected to the housing body (5), and with a movable piston (12) which closes or opens the passage depending on its position, wherein the piston (12) has a piston shaft which extends through a seal and the housing cover (10), wherein the piston (12) is detachably connectable to the actuator (3) in a form-fitting manner.

3. Device according to claim 1 or 2, wherein the mounting module (4) and the valve unit (2) are geometrically matched to one another such that the mounting module (4) can be brought into connection with the valve unit (2) in a predetermined, predefined position.

4. Device according to claim 1, 2 or 3, wherein the mounting module (4) and the valve unit (2) are positively connected to one another.

5. Device according to claim 4, wherein the positive connection is a snap-in connection.

6. Device according to claim 5, wherein the mounting module (4) has a locking projection which cooperates with a correspondingly designed stop on the valve unit (2).

7. Device according to at least one of claims 1 to 6, wherein the valve unit (2) has a first connection piece (6) which forms an inlet and a second outlet piece (7) which forms the outlet, wherein the mounting module has two tabs (23a, 23b) which are formed parallel to one another, wherein each tab (23a, 23b) has a recess (24a; 24b) so that one tab (23a) encompasses the first piece (6) and the second tab (23b) encompasses the second piece (7).

8. Device according to at least one of claims 1 to 7, wherein the actuator (3) has a driver (14) which is connected, in particular in a form-fitting manner, to a piston (12) of the valve unit (2).

9. Device according to claim 8, wherein the driver (14) has a recess extending in the axial direction of the piston, into which a shaft of the piston can be inserted, the mounting direction being perpendicular to the axial direction of the piston.

10. Device according to claim 9, wherein the driver (14) has two slots provided perpendicular to the axial direction of the piston, which are parallel to one another and spaced apart, the shaft of the piston having corresponding radially outwardly directed projections which are or will be brought into the slots.

Images