CN101395385A

CN101395385A - Valve bank comprising a safety valve

Info

Publication number: CN101395385A
Application number: CNA200780008112XA
Authority: CN
Inventors: G·博格达诺维奇; J·布伦纳
Original assignee: Festo SE and Co KG
Current assignee: Festo SE and Co KG
Priority date: 2006-03-09
Filing date: 2007-01-25
Publication date: 2009-03-25
Anticipated expiration: 2027-01-25
Also published as: ATE439524T1; EP1991791A1; CN101395385B; EP1991791B1; WO2007101506A1; DE502007001300D1; DE102006010844A1

Abstract

The invention relates to a valve bank (6) which comprises a plurality of electrically actuatuable control valves which are connected simultaneously to at least one common cable duct (1) and a common vent duct (3, 5). The at least one supply channel (32, 33) supplies the common cable duct (1) with pressure means required for operating the valve bank (6). An additional safety valve (15) enables the channel connection between the at least one supply channel (32, 33) and the common cabel duct (1) to be selectively released or blocked. When the connection is blocked, the safety valve adopts an aeration position and the common cable duct (1) is vented towards the atmosphere.

Description

The valve group that has safety valve

The present invention relates to a kind of valve group, it comprises that a plurality of electricity touch control valve, it links to each other with at least one public supply pipeline respectively simultaneously, and link to each other with at least one common discharge duct, and can control this pipeline respectively with at least one power conduit independently, the connection of at least one feed pipe and safety valve, described at least one independently power conduit can link to each other with load, described at least one feed pipe is used to described at least one public supply line transportation pressure medium, safety valve is connected between described at least one feed pipe and described at least one public supply pipeline, connects so that optionally open or close pipeline.

Disclosed this valve group in patent disclosure EP1041325B1, it comprises several control modules, and each module links to each other with the control corresponding valve, and these control valves accumulate in a kind of modular device together.By making the public supply pipeline pass modular device, can be all control valve supply pressure media simultaneously.The discharging of control valve takes place by the common discharge duct that one or two passes modular device equally.The public supply pipeline is placed on the downstream of isolating valve, and it can be used as safety valve, and is in when breaking down situation, the public supply pipeline can be disconnected the position that is connected with the feed pipe of supply pressure medium.This then valve group is separating pressure medium pipeline more or less.Yet, disconnect connection if still be in completely supply pressure following time in the valve group, be closed in the unexpected switching function that pressure medium in the valve group still may cause control valve.

An object of the present invention is to design a kind of valve group, it has improved the Safety function of closing the aspect.

In order to achieve this end, the valve design group makes safety valve can switch to exhaust position like this, and it makes described at least one public supply pipe evacuation in this position, and closes feed pipe simultaneously.

In this manner, closing under the condition of feed pipe, the pressure medium that is positioned at least one public supply pipeline (when closing) of valve group is not held back simply, but is discharged in the atmosphere.Therefore the valve group is deprived the pressure of supply side, thereby the switching manipulation of control valve even still take place, can not produce unexpected function to the load that is connected yet.And now the valve group is carried out service work, for example changing the control valve that damages may be without any risk.The design safety valve may be without any difficulty, thereby when for example power supply and/or pressure supply were lost efficacy, it automatically switched to exhaust position.

Define useful variation of the present invention in the dependent claims.

In order to make the valve group after emptying, prepare once more operation, the valve group can be designed to have at least two feed pipes, it couples together with the public supply pipeline of valve group simultaneously concurrently at the open position of safety valve.The speed flow valves group that pressure medium can be very high then.

The discharging of described at least one public supply pipeline for example can be specially undertaken by one of them common feed pipeline of valve group at least.This means and do not need extra exhaust position in the valve group.If the valve group has two common discharge duct that are used for control valve like that by the situation of common valve group, the design safety valve promptly for described at least one the public supply pipeline of emptying, can adopt two common discharge duct of valve group so like this.

And except a common conduit of described at least valve group, also can provide at least one independently extra blowdown piping, but by described at least one the public supply pipeline of this blowdown piping emptying.In this case, by having suitable relief valve design, can impact emissions operation, make this discharging specially by independently extra blowdown piping-or can be described as high speed emissions operation-concurrently by a common discharge duct and its independently extra blowdown piping of valve group are realized at least.Back one possibility means can obtain high discharging cross section.

It is dynamic drive that safety valve is preferably designed to.It can be by oneself, or may accept its electric operation signal as the electric cascade unit that standard feature is assembled by a kind of.In this case, preferred so design safety valve promptly holds it in electric failure state by the spring assembly that is in exhaust position.In order to switch on positi, the dynamic drive safety valve, and make its valve part overcome spring force and deflection.If power supply supply was during operation lost efficacy, safety valve can be moved on the exhaust position of no problem immediately and reliably so.

In the decision design of safety valve, discharge stream is passed the chamber in the spool of safety valve.This may produce particularly advantageous pipeline loop and arrange.

Safety valve can be arranged on or be assemblied on any suitable position of valve group.Under any circumstance, it all will be on the valve group, thereby can obtain not have the size of the compactness of external security member.

Under particularly advantageous embodiment's situation, safety valve is a kind of independently security module, and it is collected in the control module that comprises at least one control valve respectively, to form a kind of modular device.In this case, security module is a series of control modules, for example terminal module or intermediate module parts.In fact back one possibility make on any point, realize the valve group operate needed pressure medium in the middle of supply with and all become possibility.

This valve group preferably includes a kind of fluid distributor of modular design, it has the independent fluid distribution module, it has the control module of control valve and forms under the condition of security module at composition, is equipped with safety valve, and can be assembled together with a kind of modular mode.Fluid distribution module preferably respectively comprises two independently power conduits, and it is continuous with relevant control valve respectively, is used to drive load.The fluid distribution module of safety valve preferably also has two independent fluid pipelines that run through it, and one of them fluid line is formed the feed pipe that is used for the public supply pipeline.According to above-mentioned improved design, second fluid line can be used as another feed pipe in parallel, or as extra blowdown piping.If it does not need, it can be blocked so.

Describe the present invention in detail hereinafter with reference to accompanying drawing.

Fig. 1 has shown a preferred embodiment according to valve group of the present invention with perspective view, has wherein removed the final element of the fluid distributor of valve group.

Fig. 2 is the sectional view of Fig. 1 valve group of dissecing along near the hatching II-II the safety valve.

Fig. 3 has shown the safety valve that is adopted in Fig. 1 and Fig. 2 device with longitudinal component and with exhaust position.

Fig. 4 has shown the on positi that the safety valve of Fig. 3 is in the normal running to be adopted.

Fig. 5 has presented a kind of and Fig. 3 same way as, and is in the modification of the safety valve of exhaust position.

Fig. 6 has presented the safety valve of the Fig. 5 that is on positi.

The overall valve group of representing with label 6 that has decision design, it comprises the fluid distributor 8 that extends with the direction of the longitudinal axis 7, it carries several electricity and touches the control valve 13 of operation on attachment face 12.Control valve 13 be arranged in succession by shown in the double-head arrow and with line direction 14 that the longitudinal axis 7 overlaps on.Attachment face 12 is gone back support safety valve 15, and it is also contained in the row of safety valve 13.Safety valve 15 is terminated at an end of the row of control valve in the embodiment of this particular job.

Fluid distributor 8 has at least one service 1 that runs through with longitudinal direction, and it is public for all control valves 13.First blowdown piping 3 and second blowdown piping 5 are parallel to this public or shared service 1 and extend, it is similar to public supply pipeline 1, be open to a plurality of positions on the attachment face 12 respectively, thereby, and link to each other with 5 with each blowdown piping 3 with each control valve 13 and each public supply pipeline 1.

In addition, public supply pipeline 1 is open on the member mounting zone 16 of attachment face 12 with these two

blowdown pipings

3 and 5, connects and safety valve 15 is removably fixed by for example spiral in this zone.Therefore, the public supply pipeline 1 and first common discharge duct 3 and second common discharge duct 5 all communicate with each control valve 13, and communicate with safety valve 15.

And each control valve 13 communicates with these two

power conduits

17 and 18 of distributing to it respectively, its relative longitudinal axis 7 is horizontally through fluid distributor 8, and an end is open on the attachment face 12 respectively, the control valve 13 that is used to be associated, and be open to vertical outside of fluid distributor 8 at the other end, be positioned at junction surface 22 places.At junction surface 22 places, power conduit 17 can link to each other with the fluid pipe-line that leads to load (not showing in detail among the figure) with 18, thereby operates by for example fluid dynamic.

During the routine operation of valve group 6, public supply pipeline 1 provides pressure medium, more particularly, and the pressurized air under the supply pressure.This pressure medium is from the pressure source P that links to each other with valve group 6.Control valve 13 can touch operation by electricity, and can be located at corresponding different switching position, in these switching positions, its optionally with the independently power conduit 17 that connected and 18 and public supply pipeline 1 couple together, or couple together with one of them blowdown pipings of two common discharge duct 3 and 5.So-called 5/2 switching function is arranged in this case usually.

The electricity of control valve touches operation necessary operations signal, and it comprises control signal and operand power, and sort signal is passed to the electrical connection (not shown) place of control valve 13 by the electric cascade unit 23 that extends with line direction 14.They are based on electronic equipment, and it can be installed on the valve group 6, and/or are external.

Control valve is the leading type valve preferably, and it respectively has the pilot valve device that electricity touches operation, for example electromagnetic valve device.Each pilot valve device can be made up of the pilot valve that one or two electricity touches operation.

Two

common discharge duct

3 and 5 are opened the attachment face 12 on the outer surface of fluid distributor 8, and link to each other with atmosphere via opening.This can directly or by the silencing apparatus of centre or by pipeline be connected in the atmosphere in some remote spots.

Fluid supply to public supply pipeline 1 can be controlled by the safety valve 15 that is arranged on the valve group 6.

As for details, safety valve 15 has the outlet 24 that links to each other with the service of sharing 1.And it has two

floss holes

25 and 26, and wherein first floss hole 25 links to each other with common discharge duct 3, and wherein second floss hole 26 links to each other with common discharge duct 5 always.

For this purpose, safety valve 15 also has the valve port 27 and 28 that links to each other with the first fluid distribution duct 2 and second fluid distribution pipe 4 respectively.These valve ports also preferably are open on the attachment face 22 of fluid distributor 8, can provide the connection set (not shown) herein, are connected to become possibility so that lead to outside fluid line.

In all working example, first fluid distribution duct 2 is formed the feed pipe 32 that links to each other with pressure source P constantly.

Second fluid distribution pipe 4 also is a feed pipe 33 in the work example of Fig. 2 to Fig. 4, and it links to each other with pressure source P in the loop configuration parallel with another feed pipe 32 constantly.On the contrary in Fig. 5 and work embodiment shown in Figure 6, second fluid distribution pipe 4 is as the extra blowdown piping 34 except common discharge duct 3 and 5.Its opening of being located on the attachment face 22 directly or by the suitable silencing apparatus in centre communicates with adjacent atmosphere or with some other discharge pipe line put on the position that leads to atmosphere in the operating process of valve group 6.

In all work examples, be the needed pressure mediums of public supply pipeline 1 supply valve group, 6 operations specially by at least one feed pipe 32 and 33.Do not have other fluid that is not subjected to safety valve 15 controls to supply with and offer public supply pipeline 1.Close by for example stopper and to be present in the standard feed hole that is used for public supply pipeline 1 on the fluid distributor 8 (in detail show).Yet, when utilization does not have the valve group 6 of safety valve 15 or do not use the function of existing safety valve 15, can adopt it.

The work example of all valve groups 6 is all shared common feature, promptly under the help of safety valve 15, described at least one feed pipe 32 and 33 and with public supply pipeline 1 that safety valve 15 links to each other between be connected, it optionally is switched on or switched off connection.

Connect under the situation about connecting at pipeline, safety valve 15 will be taked the on positi shown in Fig. 4 and Fig. 6 in the work example.According to Fig. 4, in this case, two feed pipes 32 link to each other with public supply pipeline 1 with 33 simultaneously.According to Fig. 6, existing between public supply pipeline 1 and single feed pipe 32 flows connects.

Be connected with pipeline shown in Figure 5 under the state that disconnects at Fig. 3, public supply pipeline 1 is connected with relevant feed pipe 32 and 33 disconnections respectively in a fluid tight manner.Simultaneously, because safety valve 15 is taked exhaust position, so it still is disposed in the atmosphere.To work embodiment shown in Figure 4, this is owing to the reason of having connected the connection between the public supply pipeline 1 and first common discharge duct 3 at Fig. 2.In Fig. 5 and work embodiment shown in Figure 6, public supply pipeline 1 is simultaneously by second common discharge duct 5, and discharges by extra blowdown piping 34.

The type of tube drainage is not how, and therefore public supply pipeline 1 general does not have pressure at the exhaust position of safety valve 15, and whole valve group 6 will not have pressure.Therefore, even owing to electronic control or owing to manually-operable, will cause control valve 13 to carry out handover operations, this operation can not produce any harm campaign to the load that is connected.The inner pressure that obtains of valve group is decreased to barometric pressure, and it further makes removes safety valve 13 safely and become possibility, with the purpose that is used to repair or change.

To work embodiment shown in Figure 4, the discharge process for safety valve 15 controls does not adopt second common discharge duct 5 at Fig. 2.Can so design control valve 15 in this case, make second floss hole 26 that maintenance is closed, no matter the position of the spool 35 of safety valve 14 how.

Yet can imagine design safety valve 15 like this certainly, thereby make

common discharge duct

3 and 5 all be used to discharge public supply pipeline 2 at exhaust position.

And from design according to Fig. 5, also may utilize simultaneously

common discharge duct

3 and 5 and extra blowdown piping 34 come emptying public supply pipeline 1, perhaps have only extra blowdown piping 34 to exist, two common discharge duct 2 and 5 are not shared the discharge function of safety valve so.

Design also may be that extra blowdown piping 34 does not communicate with independent fluid distribution duct 4, but directly lead to the free outer surface of the shell 36 of safety valve 15, so that impel fluid from this position and walk around fluid distributor 8 and be disposed to atmosphere and become possibility.

No matter its other possible design is any, safety valve 15 preferred disposition are dynamic drive.It has electric interfaces 37, is used to provide its excitation necessary operations signal.Sort signal can be provided individually, perhaps provide sort signal by the electric cascade unit 23 that exists, it can be comparable with the electric operation of control valve 13.

Safety valve 15 all is the multi-way valve of assist control in all working example.It comprises that electricity touches pilot valve 38, solenoid valve for example, and its excited state has been set the current operation status of safety valve 15.

Safety valve 15 comprises to have been described, and preferably adopted the spool 35 of piston form, and it can move on its longitudinal direction between the two positions, and described two positions are exhaust position in one case, and be on positi in another case.

Spool 35 1 ends have the actuator surface 42 of axial orientation, and it defines guide's chamber 43, its with link to each other with the guide's controlling plumbing fixtures 44 shown in the dotted line.The pressure medium that guide's controlling plumbing fixtures 44 has under the pilot pressure is supplied with, and it carries in the work example from the guide's feed pipe 45 that extends to fluid distributor 8 inside.Guide's feed pipe 45 can not rely on public supply pipeline 1 and obtain the supply of pressure medium or obtain the supply of pressure medium from public supply pipeline 1.Perhaps, will also guide's controlling plumbing fixtures 44 of safety valve 15 inside can be coupled together with output port 24.

Pilot valve 38 is placed on the pilot conduit 44.It can optionally open or close the passage that passes pilot conduit 44.Down, it provides the discharging of guide's chamber 43 simultaneously in off position.

When conduit road 44 is connected in the ban, formerly have pilot pressure in the guide cavity chamber 43, this pressure acts on the actuator surface 42, and spool 35 is applied arrangement power or servo force, thereby the latter is switched to the open position that presents among Fig. 4 and Fig. 6.

Thereby obtain arrangement power 46 all the time at open position, so that overcome the restoring force 47 of the adverse effect of spring assembly 48, the exhaust position shown in Fig. 3 and Fig. 5 pushed spool to all the time by this spring.Spring assembly 48 has the other end on the valve casing 36 that is resisted against the end on the spool 35 and is resisted against safety valve 15 directly or indirectly.In order to save size, spring assembly 48 is movable in the axial depression of spool 35.The mechanical spring device 48 that in work embodiment, exists, can exist other actuation gear to produce restoring force 47.For example, the present invention also can imagine a kind of air cushion spring.Regardless of its design, spring assembly 48 all has advantage really, promptly in the ban guide cavity chamber 43 because the relevant pressure of system falls or when not having pressure owing to the power supply fault, it makes spool 35 move to exhaust position.

Spool 35 extends in the valve core housing 52 of valve casing 36, and the sealed device 53 of this valve core housing axially is separated into several parts.Seal arrangement 53 surrounds spool 35 coaxially, and preferably is provided with means of fixation with respect to valve casing.More particularly, it can comprise the Sealing of a plurality of ring-types, is provided with the gap between it, and these Sealings can with the peripheral different piece of a certain mode and its sealing take place according to axial position and contact.Above-mentioned various piece links to each other with above-mentioned port 24 to 28.

In order to carry out required switching function, spool 35 has carried out multiple fractionation in the axial direction on the periphery of its substantially cylindrical.Therefore, exist big and than the axial order of the part of minor diameter.

Contact or seal the shortage of contact according to the position of spool 35 and caused sealing, correspondingly separate port 24 and 28 as implied above are connected with each other or separated from one another with seal arrangement 53.

In Fig. 5 and work embodiment shown in Figure 6,35 of spools are touched by peripheral fluids.For make at exhaust position public supply pipeline 1 have with the second public supply pipeline 5 and with extra blowdown piping 34 in be connected, spool 35 has relatively long waist 54, its at exhaust position along all

ports

24,26 and 28 and extend.

To work embodiment shown in Figure 4, spool 36 has comparatively special in a way feature at Fig. 2, and promptly it has chamber 55, passes through this chamber head pressure medium at exhaust position.

Chamber 55 two axially spaced positions respectively by at least one and preferably several transmit

openings

56 and 57 and open wide to lead to the periphery of spool 35.At exhaust position, can so place and transmit

opening

56 and 57, promptly its some opening 56 communicates with output port 24, and other openings 57 communicate with first floss hole 25.The guiding emission flow can be passed stop valve port 27 in this manner, and not influence it.

In this, should note its output port 24 preferred side shafts to by far-end valve port 27 flanked, and opposite side is by another far-end valve port 28 flanked.In one case, these two far-end valve ports 27 and 28 have axially outwards been followed first floss hole 25, and in another case, have followed second floss hole 26.

Security concept of the present invention also can be realized in the fluid distributor 8 of non-fastization of mould.Yet the fluid distributor 8 of binding modulesization is particularly advantageous, really as in the cited here work example.

Under present case, fluid distributor 8 is separated into several

fluid distributor modules

58 and 59 arranged side by side on line direction.In this case, first fluid distribution module 58 is equipped with control valve 13, is equipped with independently

power conduit

17 and 18 in addition.Second fluid distribution module 59 has safety valve 15, and has two fluid distribution pipes 2 and 4.Because modular design, public supply pipeline 1 and

common discharge duct

3 and 5 are separated into the pipe section of independent

fluid distribution module

58 and 59, and it is complimentary to one another.

Control valve 13 each self-formings of first fluid distribution module 58 above being seated in it control corresponding module 62.In the course of the work, these control modules 62 respectively have first fluid distribution module 58 and two control valves 13 arranged side by side.Safety valve 15 is represented security module 63 with second fluid distribution module 59.

Shown in work embodiment in, security module 63 is installed in an end of modular device.Yet it can quite easily be installed in the row of control module 62, and its axial either side is by at least one control module flanked.Because the supply to the pressure medium of valve group 6 is undertaken by security module 63, therefore or extraly or alternatively to realize supplying with from an end be feasible from a side so that to valve group 6 realize pressure mediums in the middle of carry.Security module 63 can be formed the link block or the intermediate module of modular device.

If safety valve 15 and control valve 13 have the pneumatic interface that adapts, it is allowed on the member attachment face that is provided to the consistent fluid distributor that is shaped 8, is possible with each fluid distribution module as the replacement scheme of supplying control module 62 or supply security module 63 so.

Change In Design shown in mechanical spring or the air cushion spring recovery device as an alternative, safety valve 15 also can adopt the form of sentinel valve to realize, and in this case, the pilot valve that touches operation by corresponding electricity pre-determines two switching position.The advantage of this design is, for keeping on positi, what do not need to continue actuates or the corresponding pilot valve 38 of electric excitation.Yet, so still can the maintained switch position after the power supply fault.

Claims

1. valve group, comprise that a plurality of electricity touch control valve (13), described control valve is while and at least one public supply pipeline (1) and at least one common discharge duct (3 respectively, 5) link to each other, and can control these pipelines (1,3,5) respectively with at least one power conduit (1 independently, 18), at least one feed pipe (32,33) and the connection of safety valve (15), described at least one independently power conduit (1,18) can link to each other with load, described at least one feed pipe (32,33) be used to described at least one public supply pipeline (1) supply pressure medium, described safety valve (15) is connected between described at least one feed pipe (32,33) and described at least one public supply pipeline (1), being used for optionally opening or closing pipeline connects, it is characterized in that described safety valve (15) can switch to exhaust position, described at least one the public supply pipeline (32 of emptying, 33), and simultaneously disconnect the connection of described feed pipe (1).

2. valve group according to claim 1, it is characterized in that, it comprises at least two feed pipes (32 that link to each other with described safety valve, 33), exhaust position in described safety valve (15), described feed pipe is closed, and at the on positi of described safety valve (15), described feed pipe links to each other with described public supply pipeline (1) simultaneously.

3. valve group according to claim 1 and 2, it is characterized in that described safety valve (15) couples together described at least one public supply pipeline (1) and at least one common discharge duct (3,5) at its exhaust position, described at least one common discharge duct (3,5) communicates with atmosphere.

4. valve group according to claim 3 is characterized in that, at described exhaust position, single common discharge duct (3) links to each other with described at least one public supply pipeline (1).

5. according to each the described valve group in the claim 1 to 4, it is characterized in that, described safety valve (15) couples together described at least one public supply pipeline (1) and extra blowdown piping (34) at its exhaust position, described extra blowdown piping (34) is independent of described at least one common discharge duct (3,5).

6. valve group according to claim 5 is characterized in that, the exhaust position in described safety valve (15), and described public supply pipeline all links to each other with described at least one common discharge duct (5) and described extra blowdown piping (34).

7. according to each the described valve group in the claim 1 to 6, it is characterized in that it is dynamic drive that described safety valve (15) is designed to.

8. valve group according to claim 7 is characterized in that, described safety valve (15) is the leading type valve, and it is controlled by at least one pilot valve (38) that can electric actuate.

9. according to claim 7 or 8 described valve groups, it is characterized in that described safety valve is actuated device constantly and pushes described exhaust position to, described actuation gear adopts the form of spring assembly (48) especially.

10. according to each the described valve group in the claim 1 to 9, it is characterized in that, described safety valve (15) comprises spool (35), it can optionally be positioned at described exhaust position, or be positioned at the on positi that described public supply pipeline (1) and described at least one service (32,33) are coupled together.

11. valve group according to claim 10 is characterized in that, described spool (35) has chamber (55), at described exhaust position, by described chamber (55) but the head pressure medium.

12. each the described valve group according in the claim 1 to 11 is characterized in that, described safety valve (15) is a member of the independent safety module (63) of described valve group (6).

13. valve group according to claim 12 is characterized in that, described control valve (13) is that described security module (63) is incorporated in the row of described control module (62) with the member of the control module arranged side by side (62) of line direction (14) arrangement.

14. valve group according to claim 12, it is characterized in that, described security module (63) adopts the form of the terminal module in the row of the described control module of termination (62), or adopts the form of the intermediate module in the row that medially is positioned over described control module (62).

15. according to claim 13 or 14 described valve groups, it is characterized in that, described security module (63) comprises the fluid distribution module (59) that is equipped with described safety valve (15), other fluid distribution module (58) placement of connecting of this distribution module and the described control valve of carrying (13), described public supply pipeline (1) and common discharge duct (3,5) extend through all fluid distribution modules (58,59), and described at least one feed pipe (32,33) in the fluid distribution module (59) of described safety valve (15), extend, and the opening on the outer surface (22) is not covered by adjacent fluid distribution module.

16. valve group according to claim 15 is characterized in that, distributes to the described fluid distribution module (58) of described control valve (13), it all has at least two power conduits (17,18) that independently extend through them in all cases.

17. according to claim 15 or 16 described valve groups, it is characterized in that, the fluid distribution module (59) of described safety valve (15) has two fluid lines (2 that independently extend through it, 4), wherein at least one fluid line has been formed the feed pipe (32,33) that is used for described public supply pipeline (1).