EP0708890A1

EP0708890A1 - Valve station

Info

Publication number: EP0708890A1
Application number: EP94922253A
Authority: EP
Inventors: Kurt Stoll; Manfred Ruedle
Original assignee: Festo SE and Co KG
Current assignee: Festo SE and Co KG
Priority date: 1993-07-13
Filing date: 1994-07-02
Publication date: 1996-05-01
Anticipated expiration: 2014-07-02
Also published as: US5603350A; ES2099624T3; DE59402246D1; DE9310438U1; KR960702066A; KR100192993B1; WO1995002770A1; ATE150847T1; EP0708890B1; JPH08512393A

Abstract

PCT No. PCT/EP94/02172 Sec. 371 Date Nov. 16, 1995 Sec. 102(e) Date Nov. 16, 1995 PCT Filed Jul. 2, 1994 PCT Pub. No. WO95/02770 PCT Pub. Date Jan. 26, 1995A valve station is suggested which is provided with a fluid distribution device (5) with an equipment panel (8). A plurality of multi-way valves (12) are mounted on the panel (8), which are controlled by an electrically actuable valve drive (16). The multi-way valves (12) are aligned in such a manner that the direction (37) of the switch movement of its given obturator (36) extends rectangularly with respect to panel (8). The fluidic connection of a given multi-way valve (12) with an internal feeding conduit (26) of the fluid distribution device (6) is performed through an orifice (57) of a valve conduit (59) which is provided on the front face (53) of the given multi-way valve (12) opposite of panel (8).

Description

Valve station

description

The invention relates to a valve station for use in connection with the control of fluid-actuatable devices, for example of working cylinders, with a fluid distribution 1, in particular plate-like, block-like or strip-like, which has an assembly area which is shown in FIG a plurality of consecutively arranged Venti 1 assembly places is subdivided, each of which can be equipped with a multi-way valve, which has a valve member that can be driven for a switching movement and at least one consumer connection opening arranged on an outside of the Venti 1 housing that does not face the assembly area for connection with a device that can be actuated by a f1 ui d

Fluid line, wherein in the fluid distribution device runs at least one feed channel, which communicates on the one hand with a fluid source and on the other hand with a plurality of the Venti 1 assembly places and thereby with the multi-way valves arranged there, and with one Signal distribution extending along the row of Venti 1 assembly places, which serves to transmit actuation signals coming from an electronic control device to an electrically actuable Venti 1 drive, with which a The respective multi-way valve is equipped, wherein a respective valve drive has a movable control element which controls a control channel which serves to provide the valve element of the multi-way valve with the fluid control signal required to generate its linear switching movement e to send.

Valve stations of this type are also known as valve terminals Draws and contain a generally plate-like fluid distribution device equipped with a plurality of multi-way valves arranged in a linear row. The supply and expediently also venting of the working fluid, which is, in particular, compressed air, takes place via the fluid distribution device. For actuation, each multi-way valve is equipped with at least one valve drive, which as a rule contains at least one electromagnet, which acts on a control element. These valve drives receive their actuation signals via a signal distribution device, which extends along the fluid distribution device 1 and communicates with an electronic control device. In this way, starting from the valve station, various fluid-actuated devices can be operated from any central location

Control system or device. These devices are, as indicated in the German utility model G 92 11 109, connected via rigid or flexible fluid lines to the individual multi-way valves, which for this purpose have suitable consumer connection openings on the opposite side of the assembly surface. The multi-way valves themselves are aligned with their longitudinal axis transverse to the respective direction of the series.

Although the known valve station is already very compact, in some applications, for example in the printing industry, there has been a need for an even more compact design. A reduction in the dimensions would be desirable both in the width direction and in the height direction — with respect to the row direction of the successively arranged multi-way valves.

It is therefore the object of the present invention to provide a valve station which enables a more compact design.

This object is achieved in that at least one additional Directional control valve and expediently all multi-way valves are arranged on the assembly surface of the fluid distributor 1 such that the direction of the switching movement of the respective valve 1 is aligned at right angles to the assembly surface, the fluidic connection with the internal one The feed channel of the fluid distribution device 1 takes place via a mouth of a valve channel of the respective multi-way valve provided on the end face of the multi-way valve facing the assembly surface.

This initially results in a considerable reduction in the overall width of the valve station transverse to the direction in which the multi-way valves are lined up. The relevant multi-way valves are now oriented practically upright, so that they are supported on the end face on the assigned placement locations and both the valve member and the direction of movement of its switching movement run in the normal direction with respect to the placement area. Despite this particular orientation, there is no appreciable increase, but as a rule even a decrease in the overall height measured in the normal direction of the assembly area. This is due to the fact that it is possible to provide the consumer connection openings of a respective multi-way valve on one of the towering lateral housing surfaces, so that the further flow lines can come off directly from the side and a strong deflection is not necessarily necessary. By supplying the multi-way valves with the required working fluid via an opening at the end of a respective multi-way valve facing the respective assembly location, a direct fluid connection is also possible without external connecting hoses, which further enhances the compactness.

Advantageous developments of the invention are listed in the subclaims. The arrangement according to the invention enables a particularly simple arrangement of a manual actuation device, since the valve member is already aligned in the normal direction to the assembly surface, and thus the one of the two end faces of the multi-way valve is unhindered and is generally accessible from above. The manual actuation device can be equipped with a simple actuation part which protrudes from the front of the valve housing 1 and acts directly on the valve member in the event of manual displacement without any special deflection. In this case, the actuating element can expediently be suspended from an elastic membrane with restoring properties.

It is expedient not only to provide the consumer connection openings, but also the valve drive (s) assigned to a respective multi-way valve on one of the lateral housing surfaces of a respective multi-way valve which protrudes from the assembly surface. It is advisable to use oppositely aligned housing surfaces on the respective multi-way valve.

The invention is explained in more detail below with reference to the accompanying drawing. In this show:

Fig. 1 is a simplified plan view of a valve station designed according to the principles of the present invention including a controlled f1 ui dbetäti device, the other controllable devices are not shown, and

Fig. 2 shows a cross section through the valve station of Fig. 1 along section line II-II, the existing valve 1 being shown untreated for simplification.

The exemplary valve station 1 initially contains a control part 2 with a block-like shape in particular. On A connecting side 3 of the control part 2 is attached to a block-like elongated distributor device 4, which is composed of a fluid distributor 1 device 5 for fluid and a signal distributor 1 device 6 for in particular electrical valve actuation signals 6. According to the example, the distributor device 4 has a distributor housing 7 which functions as a common housing for both distributor devices 5, 6.

The Fl uidvertei lereinri device 5 is provided, for example, on its top with a placement surface 8 for multi-way valves 12. It is subdivided into a plurality of valve assembly stations 13 which are arranged in succession in a row direction 14, this row direction 14 running parallel to the longitudinal axis 15 of the distributor device 4. A multi-way valve 12 can be detachably mounted on each valve 1 assembly place 13, in the exemplary embodiment there are five valve 1 assembly places 13, all of which are equipped.

Each multi-way valve 12 is equipped with at least one valve drive 16, which is in particular directly attached to the relevant valve housing 17. Each valve drive 16 is actuated by the already mentioned valve 1 actuation signals, which are supplied via the signal distribution device 1. According to the example, the valve drives 1 are formed by an electromagnet device 18, the magnet coil (not shown) being able to move a control element 22 which acts as a valve element and which controls a control channel 23 of the associated multi-way valve 12 which is yet to be explained. Each valve 1 drive 16 is mounted on the signal distribution 6 on a valve 1 drive assembly 24, which is located transversely to the longitudinal axis 15 next to the valve 1 assembly 13 of the associated multi-way valve 12. Correspondingly, here too, a linear row of valve-drive assembly places 24 is provided, the row direction 25 being parallel to the row. direction 14 runs.

In the interior of the fluid distribution device 5, a feed channel 26 runs parallel to the longitudinal axis 15. It opens on the one hand at the end of the distributor housing 7 opposite the control part 2, where a fluid line 27 leading to a pressure medium source 1 e is connected. On the other hand, it is jointly assigned to all multi-way valves 12 by opening out via branch channels to each venti 1 assembly location 13. The corresponding mouths are indicated at 28. In a corresponding manner, the distributor housing 7 contains a relief or ventilation channel 32, which on the one hand opens out on the same end face as the feed channel 26, so that a silencer 34 or a further ventilation line can be connected. On the other hand, the ventilation channel 32 also has openings 33 which open to a respective venti 1 assembly location 13. The feed channel 26 and the ventilation channel 32 are each designed as collecting channels, via which the multi-way valves 12 are supplied or vented with working fluid. With this working fluid, fluid-actuated devices 35 connected to the multi-way valves 12 are actuated. Such a fluid-actuated device 35 in the form of a working cylinder is indicated in FIG. 1 for illustration.

The manner in which the connected fluid-actuated device 35 is actuated depends on the switching state of the associated multi-way valve 12. Each multi-way valve 12 contains in the interior of its valve housing 17 a valve member 36 which can perform a reciprocating linear switching movement. The direction of the switching movement is indicated in FIG. 2 by double arrow 37. In the exemplary embodiment, the valve member 36 has two consumer channels 38 per multi-way valve 12, which via two consumer connection openings 43 lead to an outer housing surface 44 of the valve open out housing 17. Rigid or elastic fluid lines 42, which are relocated to the device 35 to be actuated, can in particular be releasably connected to these. In the exemplary embodiment, the valve member 36 can assume two switching positions, which are indicated in Fig. 2 on both sides of its axis of symmetry 45 forming the axis of symmetry, so that alternately either one or the other consumer connection opening 43 is supplied with working fluid, while venting the other via the other connected device 35 takes place.

The switching movement of the valve 1 gl i edes 36 is caused by fluid control signals, which the feed channel 26 delivers as a function of the position of the actuator 22. This in turn depends on the operating state of the associated valve drive 16, which is influenced by the valve 1 actuation signals. This Venti 1 actuation signal e are generated in the exemplary embodiment directly in the control part 2, which is equipped for this purpose with a programmable control device. The signals in question pass via signal conductors (not shown in detail) of the signal distribution device 1 to the individual valve 1 drive assembly locations 24, where they are picked up by the respective valve drive 16. For example, the signal transmission takes place by means of a circuit board arrangement 46, which extends in a cavity 47 of the distributor housing 7, starting from the control part 2 in the row direction 25, and in the area of a respective valve 1 drive assembly place 24 has electrical plug-in contact means 48, into which the Assemble mounted valve 1 drives 16 with complementary plug-in contacts 49. Instead of the circuit board arrangement 46, individual flexible signal conductors can also be laid.

During operation, the multi-way valves 12 are switched in accordance with the specifications of the control program in the control part 2 in order to operate the connected, fluid-actuated devices in a desired manner. The tax! nri ch- The device does not necessarily have to be integrated in the control part 2, but can also be designed separately, so that the control part 2 may only work as a distributor station. The control part 2 can be, for example, a fieldbus communication unit.

The valve station is extremely compact since the multi-way valves 12 are fixed to the associated valve 1 assembly places 13 in such a way that the above-mentioned direction 37 of the switching movement of the associated valve member 36 runs at right angles to the assembly surface 8. A respective Venti 1 housing 12 is mounted so that it sits with one of its two axially aligned end faces 53 on the associated Venti 1 assembly 13. The normal direction of the placement surface 8 coincides with the longitudinal axis 45 of the valve 1 gl i edes 36. As a result, the valve station 1 has a relatively small overall width in the area of the distributor device 4, based on the width direction indicated by double arrow 54 and running parallel to the mounting surface 8 and at right angles to the longitudinal axis 15, but surprisingly this reduction does not lead to the overall width a disadvantageous enlargement of the height of the valve station 1 measured at right angles to the mounting surface 8 in the height direction 55. The reason is that the consumer connection openings 43 are also provided on a first lateral housing surface 44 of the valve 1 housing 17, that is to say on one of the housing surfaces which, starting from the first end face 53 facing the assembly surface 8, project upwards in the height direction 55. The Fl ui dl lines 42 connected here can easily be led away to the side so that they do not exceed the overall height of the multi-way valve 12 as such. If the consumer connection openings 43, on the other hand, were provided in the area of the second end face 56 of the venti 1 housing 17 facing away from the mounting surface 8, the fluid lines connected there would have to be curved upwards and at the same time lead away laterally, so that the fluid lines contribute to a significant increase in the overall width.

The compactness of the overall arrangement also contributes to the fact that the orifices 28, 33 provided in the area of the Venti 1 assembly places 13 communicate directly with orifices 57, 58 of Venti 1 channels 59, 60 of the respective multi-way valve 12 by said orifices 57, 58 formed on the downward facing first end face 53 and arranged in such a way that they face the distributing 1 serpentine orifices 28, 33. External connection lines are therefore unnecessary.

The valve channel 59 which communicates with the feed channel 26 in this way is connected by the valve member 56 to one or the other of the consumer channels 38 formed in the valve, depending on the switching position. In the interior of the valve housing 1, in the exemplary embodiment, a further valve channel branches off from this valve channel 59, which forms the control channel 23 already mentioned. The fluid passage through this is interrupted or released depending on the position of the control member 22. If it is released, the fluid acts on an actuating piston 61, which is connected to the valve member 36, in the region of the second end face 56. As a result, the valve member 36 moves against the force of a return spring arrangement 61 from the previously assumed first switching position into a direction towards the actuating surface 8 shifted second switching position switched. When the flow channel of the control channel 23 is interrupted, the return spring arrangement 52 moves the valve member 36 back into the first switching position. As can be seen, the multi-way valves 12 of the exemplary embodiment are thus controlled only in one direction of movement. However, it would be entirely possible to provide a valve member 36 controlled in both switching directions, it being possible to assign two valves 1 drives to a respective multi-way valve 12. A contribution to the compactness of the arrangement is also made by the fact that the valve channel 60 is formed by the end section of the receptacle 62 receiving the valve member 36 and assigned to the first end face 53. The receptacle 62 is open to the first end face 53 and lies opposite the mouth 33.

The multi-way valves 12 used in the exemplary embodiment are distinguished by a very good sealing effect of their valve members 36. The design of these valve elements 36 as seat valve elements is primarily responsible for this. In the exemplary embodiment, the elongated valve member 36 each has a central sealing element 63, which optionally cooperates with one of two annular valve seats 64 to connect the valve channel 59 to one of the two consumer channels 38. Axially on both sides, this sealing element 63 is flanked by two further sealing elements 65, 66 which, depending on the position, establish a connection between one of the consumer channels 38 and the mouth 33, a valve seat 67, 68 being assigned to each of them. The two consumer channels 38 are arranged one above the other in the height direction 55. The lower is vented through the opening 58, the upper via ei ^'nen only dot-dash lines an¬ interpreted valve channel 60' whose link üftungskanal with the decision 1 32 in the region of the associated valve Be¬ stückungsplatzes 13 also via an aligned Mündungs¬ few takes place, which is not shown in the drawing in detail.

It goes without saying that one or more sealing devices 69 are provided between the mutually assigned pairs of mouths in the area of the venti 1 assembly places 13, which ensure a leak-free flow.

The venti 1 housing 17 of the exemplary multi-way valves 12 have a cuboidal outer contour. They are so arranged on the Fl ui dvertei 1 erei nri direction 5 that the above mentioned first lateral housing surface 44 is approximately flush with a longitudinal outer surface 73 of the distributor housing 7. The valve drives 1 16 are flanged to the second side housing surface 74 of a respective valve 1 housing 17 opposite the first side housing surface 44, the control member 22 being oriented such that its actuation direction is perpendicular to the longitudinal axis 45 of the valve 1 gl i edes 36 . The normal vectors of the two lateral outer surfaces 44, 74 are therefore oriented at right angles to the row direction 14 in the width direction 54.

Since the multi-way valves 12 are practically upright, their upward-facing second end faces 56 are easily accessible. For this reason, it can be particularly well provided a manual actuation device 75 with which the valve member 36 can be operated manually if required. The manual actuation device 75 provided according to the example has an actuation part 76 protruding from the end of the housing, which is movably suspended on an elastic membrane 77 in the interior of the housing according to double arrow 37. It lies coaxially opposite the facing end face of the valve 1 and is a plastic or rubber part, in particular one piece with the membrane 77. If you press the actuating part 76 with your finger, it shifts in the direction 37 of the switching movement, loads the valve member 36 and leads it into the second switching position 1.

The two distributor devices 5, 6 could be provided with separate housings which are expediently firmly connected to one another. However, the common housing design has manufacturing advantages.

The distribution device 4 according to the example has a modular structure. There are a number of distributor modules 78, each of which has one or more Venti 1 assembly locations 13 and Venti 1 drive assembly places 24 have. The distributor modules 78 are expediently firmly connected to one another in the longitudinal direction 15, for example by screwing. In this way, distribution devices 4 of any length can be realized and modified in a modular manner.

Claims

Expectations

1. Valve station for use in connection with the control of fluid-actuated devices (35), for example of working cylinders, with a fl ui dvertei 1 device (5) which is in particular plate-like, block-like or strip-like and has a placement area (8) , which is subdivided into several successively arranged valve assembly stations (13), each of which can be equipped with a multi-way valve (12) which has a valve member (36) which can be driven to switch and at least one on an outside of the assembly which does not face the assembly surface (8) Venti 1 housing (17) arranged consumer connection opening (43) for connection to a fluid line (42) leading to a fluid-actuated device (35), at least one feed channel (26) in the fluid distribution device (5) runs, which on the one hand with a fluid source and on the other hand with a plurality of the Venti 1 assembly places (13) and thus with the do rt arranged multi-way valves (12) communicates, and with one along the row of Venti 1 assembly places

(13) extending signal distribution device (6) which serves to transmit actuating signals from an electronic control device to an electrically actuable valve drive (16) with which a respective multi-way valve (12 ), wherein a respective valve 1 drive (16) has a movable control member (22) which controls a control channel (23) which serves to provide the valve member (36) of the multi-way valve (12) with the necessary to generate its linear switching movement To send Fl ui d control signals, characterized in that at least one multi-way valve (12) and expediently all multi-way valves (12) of the valve Station (1) are arranged on the assembly surface (8) of the fluid distribution device (5) such that the direction (37) of the switching movement of the respective valve member (36) is oriented at right angles to the assembly surface (8) is, the fluidic connection to the internal feed channel (26) of the fluid distributor 1 device (5) via an orifice (57) provided on the end face (53) of the multi-way valve (12) facing the assembly surface (8) Valve channel (59) of the respective multi-way valve (12) takes place.

2. Valve station according to claim 1, characterized gekenn¬ characterized in that the fluid supply to a respective multi-way valve (12) and its venting via Ventilkanal¬ mouths on the valve housing (17), the mouths (28, 33) one inside the Fl uidvertei 1 erei device (5) ver¬ supply channel (26) and ventilation channel es (32) opposite! lie.

3. Valve station according to claim 1 or 2, characterized in that on the opposite end of the associated valve assembly site (56) of the respective multi-way valve 1 it (12) is provided for manual valve actuation manual actuation device (75) is provided Expediently has an actuating part (76) protruding from the valve housing (17), which can cooperate with the valve member (36) when it is displaced in the direction (37) of the switching movement of the valve 1 (36).

4. Valve station according to claim 3, characterized gekenn¬ characterized in that the actuating part (76) via an elastic membrane (77) is movably suspended on the housing (17) of the multi-way valve (12), wherein it is expediently formed in one piece with the membrane (77) is.

5. Valve station according to one of claims 1 to 4, characterized in that the consumer ports and openings (43) are provided on one of the side housing surfaces (44) of the respective multi-way valve, which, starting from the valve assembly station (13), runs parallel to Direction (37) of the switching movement extends away from the Venti1 assembly station (13).

6. Valve station according to one of claims 1 to 5, characterized in that the Venti1antriebe (16) on one of the side housing surfaces (74) of the respective Mehrweg¬ valve (12) are attached, which are parallel to the direction starting from the valve assembly station (37) of the switching movement of the valve member (36) extends from the Venti1 assembly station (13).

7. Valve station according to claim 6 in conjunction with claim 5, characterized in that the two housing surfaces (44, 74) are arranged opposite one another on the respective multi-way valve (12).

8. Valve station according to one of claims 1 to 7, characterized in that the valve member (36) of a respective multi-way valve (12) is at least partially designed as a seat valve member.

9. Valve station according to one of claims 1 to 8, characterized in that the fluid distribution device

(5) and the signal distributor device (6) have a common distributor housing (7).

10. Valve station according to one of claims 1 to 9, characterized in that the Signalvertei1ereinrichtung

(6) has a plurality of consecutively arranged assembly stations (13) for the valve drives (16), one valve drive assembly seat (24) each next to a Venti1 assembly station (13) of the fluid distributors. device (6) lies,

11. Valve station according to one of claims 1 to 10, characterized in that the Fl ui dvertei 1 erei nri direction (5) and the Si signal distribution 1 erei nri direction (6) on a control part (2) of the valve station (1) are designed, for example, as a fieldbus communication unit and / or as a programmed or programmable control device.

12. Valve station according to one of claims 1 to 11, characterized in that the Fl ui dvertei 1 erei nri device (5) and the Si signal distribution 1 erei nri device (6) are constructed in a modular manner and from a plurality of detachably attached distributor modules (78 ) consist.

13. Valve station according to one of claims 1 to 12, characterized in that a from the Fluidvertei1ereinrichtung (5) and the Si gnalvertei 1ereinrichtung (6) composing block, strip or plate-shaped distributor device (4) is present has two rows of assembly stations (13, 24) lying next to one another on one component side for one-way multi-way valves (12) and on the other hand valve drives (16).