CN207676230U - Fail-safe system for control valve - Google Patents
Fail-safe system for control valve Download PDFInfo
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- CN207676230U CN207676230U CN201721119258.9U CN201721119258U CN207676230U CN 207676230 U CN207676230 U CN 207676230U CN 201721119258 U CN201721119258 U CN 201721119258U CN 207676230 U CN207676230 U CN 207676230U
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Abstract
A kind of fail-safe system for control valve, with electric signal and power failure security module and the pressure fault security module communicated with the output of the electric signal and power failure security module.The electric signal and the monitoring of power failure security module are supplied to the control signal and pressurized fluid of locator, and include ultra low power consumption valve.In normal operating, electric signal and power failure security module are in first position, to allow pressurized fluid to be transmitted to pressure fault security module；And pressure fault security module is in first position, to allow the communication between locator and the actuator of control valve.When the pressure of pressurized fluid descends below set point, pressure fault security module is moved to the second position so that actuator is moved to home.When controlling dropout or interrupting, electric signal and power failure security module are moved to the second position, below set point or pressurized fluid to be prevented to flow to pressure fault security module the throttling of the pressure of pressurized fluid, pressure fault security module is moved to the second position so that actuator is moved to home by this.
Description
Technical field
Present disclosure generally relates to control valves, and more specifically, are related to the fail-safe system for control valve
System.
Background technology
Control valve is the critical component in Process Control System, and based on the pressure received from controller or locator
And/or electric signal is operated.When control valve undergoes fault mode (for example, pressure and/or electric signal are lost or fallen into and do not expect
The degree arrived) when, control valve cannot correctly work, this may damage whole process control system.In order to prevent this feelings
Condition, certain control valves using fail-safe equipment to ensure Process Control System under any operating condition, especially in failure
All it is safe in pattern.The operation principle of fail-safe equipment is that control valve is moved to home (for example, beating completely
Open and close are closed or other homes), to be protected when failure (for example, the loss of pressure loss, electric signal or power attenuation) occurs
Protect Process Control System.
Currently, typical control valve fail-safe system includes solenoid valve (electric fault-safety) and switch valve or tripping
Valve (pressure fault-safety), the switch valve or tripping valve have volume tank (volume tank) if necessary.In telecommunications
Number loss in the case of, control valve is moved to home by solenoid valve.In the case of pressure loss or when under Pneumatic pressure
When dropping to scheduled set point or less, control valve is moved to home by (may be with volume tank) switch/tripping valve.
With reference to figure 1, an example of typical control valve fail-safe system is shown comprising there is double-acting to live
Fill in the control valve 610 of actuator 611.Control valve 610 by locator 605 (for example,DVC 6200) pass through booster
606 and controlled, and the control valve 610 passes through electric position transmitter 607 and limit switch 608 and transmits position.Locator
605 receive pressurized fluid by filter 601 and adjuster 602, from pressurized fluid source of supply 600.
For the fail-safe system of control valve 610, including：A pair of of solenoid valve 609, tripping valve 604, this is to solenoid valve
609 for the case where control loss of signal to locator 605 provide electric fault-safety, the tripping valve 604 for from
The pressurized fluid of pressurized fluid source of supply 600 is lost or the pressure of pressurized fluid is descend below in the case of set point to positioning
Device 605 provides pressure fault-safety.In the system shown in figure 1, tripping valve 604 is communicated with volume tank 603, and should
Tripping valve 604 has the output that is communicated with the relative pressure room of the actuator 611 of control valve 610, one in the output
Output is connected by quick release valve 610.
The problem occurred in canonical system shown in Fig. 1 is according to IEC60381-1:1982, by locator
605 analog control signals used are usually 4-20mA or 1-5V.However, the control signal for drive magnetic valve 609
It is too low.Therefore, for drive magnetic valve 609, power (signal) comparator and other 24VDC power supplys are needed.
Utility model content
An illustrative aspect according to the present utility model, a kind of fail-safe system for control valve, including：Electricity
Signal and power failure-security module and the pressure communicated with the output of the electric signal and power failure-security module
Fail-safe module.The electric signal and power failure-security module receive the control signal and pressurized stream for being also provided to locator
Body, and include ultra low power consumption valve.In normal operating, electric signal and power failure-security module are in first position, with
Allow pressurized fluid by the electric signal and power failure-security module to the pressure fault-security module, and the pressure is former
Barrier-security module is in first position, to allow the communication between locator and the actuator of control valve.When the pressure of pressurized fluid
When power descends below set point, pressure fault-security module is moved to the second position so that actuator is moved to home.When
When controlling dropout or interrupting, electric signal and power failure-security module are moved to the second position, by the pressure of pressurized fluid
Power throttling is below set point or pressurized fluid is prevented to flow to pressure fault-security module, this is by pressure fault-security module
The second position is moved to so that actuator is moved to home.
Any one or more of aforementioned exemplary aspect also according to the utility model aspect, one kind being used for control valve
Fail-safe system can also include in any combination way any one or more of following preferred form preferably
Form.
In a preferred form, it is piezo electric valve or nozzle-baffle apparatus that ultra low power, which consumes valve,.
In another preferred form, pressure fault-security module includes switch valve.
In another preferred form, pressure fault-security module includes volume tank.
In another preferred form, the actuator of control valve is spring return function actuator.
In another preferred form, home is a position in following position：The rearmost position of control valve,
The fully open position of control valve or the fully closed position of control valve.
In another preferred form, the actuator of control valve is double acting piston actuator.
In another preferred form, fail-safe system further includes：With the output of electric signal and Power Safe module
The second pressure fail-safe module communicated.First pressure fail-safe module and actuator, in piston first
First pressure room communication on side, and the second pressure fail-safe module and actuator, in piston and first side
Second pressure room communication in opposite the second side.
In another preferred form, first pressure fail-safe module and second pressure fail-safe module are all wrapped
Include switch valve.
In another preferred form, first pressure fail-safe module and second pressure fail-safe module are all wrapped
Include volume tank.
In another preferred form, electric signal and power failure-security module are signal-powered by controlling.
Another illustrative aspect according to the present utility model, a kind of fail-safe system for control valve, including：
Integrated fail-safe module and the tripping valve communicated with the output of the integrated fail-safe module.The integrated event
Barrier-security module receives control signal and the control signal is transmitted to locator, and receives and be also provided to adding for locator
Press fluid.In normal operating, integrated fail-safe module is in first position, to allow pressurized fluid to be transmitted to tripping
Valve, and the tripping valve is in first position, to allow the communication between locator and the actuator of control valve.Work as pressurized fluid
Pressure when being decreased below set point, which is moved to the second position so that actuator is moved to home.When this
When controlling dropout or interrupting, which is moved to the second position, by the pressure section of pressurized fluid
Stream is below the set point or pressurized fluid is prevented to flow to tripping valve, which is moved to the second position will activate by this
Device is moved to home.
Any one or more of aforementioned exemplary aspect also according to the utility model aspect, one kind being used for control valve
Fail-safe system can also include in any combination way any one or more of following preferred form preferably
Form.
In a preferred form, integrated fail-safe module includes the first ultra low power consumption valve and the second surpasses
Low power consumption valve, first switch valve and second switch valve.
In another preferred form, the first ultra low power consumption valve and the second ultra low power consumption valve be piezo electric valve or
Nozzle-baffle apparatus (nozzle-flap device).
In another preferred form, integrated fail-safe module includes volume tank.
In another preferred form, the actuator of control valve is spring return function actuator.
In another preferred form, home is a position in following position：The rearmost position of control valve,
The fully open position of control valve or the fully closed position of control valve.
In another preferred form, the actuator of control valve is double acting piston actuator.
In another preferred form, the output of fail-safe module that fail-safe system further includes and integrates is logical
Second tripping valve of letter.First tripping valve with actuator, the first pressure room of the first side in piston communicate, and this second
Trip valve with actuator, the second pressure room of the second side opposite with first side in piston communicated.
In another preferred form, integrated fail-safe module is signal-powered by controlling.
Description of the drawings
Fig. 1 is the schematic diagram for the fail-safe system of the standard of the control valve with double acting piston actuator；
Fig. 2 is the schematic diagram of the exemplary fail-safe system for the control valve with spring return function actuator；
Fig. 3 is showing for another exemplary fail-safe system for the control valve with double acting piston actuator
It is intended to；
Fig. 4 is the signal of another exemplary fail-safe system for the control valve with spring return function actuator
Figure；
Fig. 5 is showing for another exemplary fail-safe system for the control valve with double acting piston actuator
It is intended to；And
Fig. 6 is the exemplary integrated fail-safe module that can be used in the fail-safe system of Fig. 4 and Fig. 5
Schematic diagram.
Specific implementation mode
Different from typical fail-safe system, example faults-security system of this paper uses electrical/power failure-
Safety device, it is fail-safe module for power supply that can use by the same control signal that locator receives.It therefore, there is no need to
The other actuator power of (as will be required by solenoid valve) for electrical/power failure-safety device, and do not need work(
Rate (signal) comparator or other 24VDC power supplys.
For example, electrical/power failure-safety device can use ultra low power consumption valve (for example, piezo electric valve), Yi Jiduo
A channel and multiport establish multiple air ducts.Piezoelectricity (piezo) valve or piezoelectricity (piezoelectric) valve use piezoelectricity
Effect (it is the ability that certain material responses generate charge in the mechanical stress applied), and power consumption is very low.
Due to low power consumption, piezo electric valve can be driven by control signal that locator uses, and can be manufactured to essential peace
It is complete and used in explosive atmosphere.
Certain advantages of example faults-security system are：
(1) other actuator power is not needed, and controls signal (4-20mA) and may be used as fail-safe
Driving power and signal；
(2) due to not needing other actuator power, power signal comparator is not needed, this simplifies controls to be
System；
(3) modularized design can use less part, and each module can be used alone or be integrated to
Meet different requirements；And
(4) fail-safe system can be fine and close, and be the robust provided for severe and/or explosive atmosphere
Design.
With reference to figure 2, example faults-security system 130 for control valve 100 is shown.Control valve 100 can be any
The sliding bar or rotary valve of type, and in the example shown, control valve 100 includes actuator 105, can be spring return function
The pneumatic actuator of actuator or any other piston or diaphragm type.Locator 110 controls the actuator 105 of control valve 100
Coming Mobile control valve 100 and reception pressurized fluid and control signal from pressurized fluid source of supply 115, (it includes power 120
With 4-20mA signals 125).
Fail-safe system 130 generally includes electric signal and power failure-security module 135 and pressure fault-safety
Module 140, the pressure fault-security module 140 are communicated with the output of electric signal and power failure-security module 135.Electricity
Signal and power failure-security module 135 receive the identical control signal received by locator 110 and are also provided to positioning
Device 110, pressurized fluid from pressurized fluid source of supply 115, and the electric signal and power failure-security module 135 are wrapped
Include ultra low power consumption valve (for example, piezo electric valve or nozzle-baffle apparatus).In this way, electric signal and power failure-security module
135 can be signal-powered by the control.Pressure fault-security module 140 may include switch valve and can also have in addition
Volume tank.
In normal operating, electric signal and power failure-security module 135 are in first position (for example, open position),
This allows pressurized fluid to arrive pressure fault-security module 140 by electric signal and power failure-security module 135.In addition, pressure
Power fail-safe module 140 is in first position, this allows logical between locator 110 and the actuator 105 of control valve 100
Letter.
If scheduled set point, electric signal and power failure-security module are lost or be less than to the pressure of pressurized fluid
135 are maintained in first position, and pressure fault-security module 140 is moved to the second position, and which prevent locators 110
Communication between actuator 105, and actuator 105 is moved to home, which can be control valve 100
Rearmost position (last position), the fully open position of control valve 100, control valve 100 fully closed position or appoint
What its desired position.
In addition, if control dropout or interruption, then electric signal and power failure-security module 135 are moved to second
Position, this by be supplied to the pressure of the pressurized fluid of pressure fault-security module 140 be throttled to less than set point voltage or
Pressurized fluid is prevented to flow to pressure fault-security module 140.Choke pressure prevents pressurized fluid from flowing to pressure fault-safety
Pressure fault-security module 140 is moved to the second position by module 140, and which prevent between locator 110 and actuator 105
Communication, and actuator 105 is moved to home.
With reference to figure 3, another example faults-security system for the control valve 200 with actuator 205 is shown
230, in this example, actuator 205 is double acting piston actuator.Locator 110 controls the actuator 205 of control valve 200
With the pressurized fluid of Mobile control valve 200 and reception from pressurized fluid source of supply 115 and control signal, (it includes power 120
With 4-20mA signals 125).
Fail-safe system 230 generally includes electric signal and power failure-security module 235 and pressure fault-safety
Module 240, the pressure fault-security module 240 are communicated with the output of electric signal and power failure-security module 235.Electricity
Signal and power failure-security module 235 receive the identical control signal received by locator 110 and are also provided to positioning
Device 110, pressurized fluid from pressurized fluid source of supply 115, and the electric signal and power failure-security module 235 are wrapped
Include ultra low power consumption valve (for example, piezo electric valve or nozzle-baffle apparatus).In this way, electric signal and power failure-security module
235 can be signal-powered by the control.Pressure fault-security module 240 may include a pair of switches valve 250,255, Mei Gekai
It closes valve to be communicated with the output of electric signal and power failure-security module 235 and locator 110, and each switch valve
There can also be other volume tank.The first pressure room of switch valve 250 and the actuator 205 on the first side of piston 208
206 are communicated, and switch valve 255 and of the actuator 205 in (opposite with the first side) the second side of piston 208
Two pressure chamber 207 is communicated.
In normal operating, electric signal and power failure-security module 235 are in first position (for example, open position),
It allows pressurized fluid to arrive pressure fault-security module 240 by electric signal and power failure-security module 235.In addition, pressure
Power fail-safe module 240 is in first position, allows logical between locator 110 and the actuator 205 of control valve 200
Letter.
If scheduled set point, electric signal and power failure-security module are lost or be less than to the pressure of pressurized fluid
235 are maintained in first position, and pressure fault-security module 240 is moved to the second position, and which prevent locators 110
Communication between actuator 205, and actuator 205 is moved to home, which can be control valve 200
Rearmost position, the fully open position of control valve 200, the fully closed position of control valve 200 or any other desired position.
In addition, if control dropout or interruption, then electric signal and power failure-security module 235 are moved to second
Position will be supplied to the pressure of the pressurized fluid of pressure fault-security module 240 to throttle below set point or prevent to add
Hydraulic fluid flow is to pressure fault-security module 240.Choke pressure prevents pressurized fluid from flowing to pressure fault-security module
240, pressure fault-security module 240 is moved to the second position, this prevents logical between locator 110 and actuator 205
Letter, and actuator 205 is moved to home.
Since the fail-safe system of this paper is that modularization, each module can be used alone in the design
Or it integrates with the different fail-safe pattern of realization (one or more).For example, if electric signal and power is used only
Fail-safe module, then fail-safe system will be double-mode fault-safety equipment (power and electric signal failure).It may be used also
To be worked together with other (one or more) tripping valve to realize all fail-safe patterns, this can be used for upgrading mark
Quasi- fail-safe system.
For example, with reference to figure 4, another example faults-security system 330 for control valve 300 is shown.Control valve
300 can be any kind of sliding bar or rotary valve, and in the example shown, control valve 300 includes actuator 305,
The actuator 305 can be the pneumatic actuator of spring return function actuator or any other piston or diaphragm type.Locator 310
The actuator 305 of control control valve 300 carrys out Mobile control valve 300, and receives the pressurized fluid from pressurized fluid source of supply 315
(it includes power 320 and 4- with the control signal of the integrated fail-safe module 335 from fail-safe system 330
20mA signals 325).
Fail-safe system 330 generally includes integrated fail-safe module 335 and tripping valve 340, the tripping valve 340
It is communicated with the output of integrated fail-safe module 335.Integrated fail-safe module 335 receive control signal and
It is also provided to locator 310, pressurized fluid from pressurized fluid source of supply 315, and the control signal is transmitted given
Position device 310.In this example, integrated fail-safe module 335 can also include that one or more ultra low powers consume valve
(for example, piezo electric valve or nozzle-baffle apparatus).In this way, integrated fail-safe module 335 can be signal-powered by the control.
In normal operating, integrated fail-safe module 335 is in first position (for example, open position), allows
Pressurized fluid is transmitted to tripping valve 340.In addition, tripping valve 340 is in first position, allow locator 310 and control valve 300
Actuator 305 between communication.
If the pressure of pressurized fluid loses or is less than scheduled set point, the valve 340 that trips is moved to the second position,
The communication between locator 310 and actuator 305 is prevented, and actuator 305 is moved to home, which can
Be the rearmost position of control valve 300, the fully open position of control valve 300, control valve 300 fully closed position or appoint
What its desired position.
In addition, if control dropout or interruption, then the fail-safe module 335 integrated is moved to the second position,
The pressure of the pressurized fluid of tripping valve 340 will be supplied to be throttled to the pressure less than set point or pressurized fluid is prevented to flow to and jumped
Gate valve 340.Choke pressure prevents pressurized fluid from flowing to tripping valve 340, tripping valve 340 is moved to the second position, this prevention
Communication between locator 310 and actuator 305, and actuator 305 is moved to home.
With reference to figure 5, another example faults-security system for the control valve 400 with actuator 405 is shown
430, in this example, which is double acting piston actuator.Locator 310 controls the actuator of control valve 400
405 with Mobile control valve 400, and receives the pressurized fluid from pressurized fluid source of supply 315 and come from fail-safe system
The control signal of 430 integrated fail-safe module 435 (it includes power 320 and 4-20mA signals 325).
Fail-safe system 430 generally includes integrated fail-safe module 435 and a pair of of tripping valve 440,445, often
A tripping valve is communicated with the output of integrated fail-safe module 435 and locator 310.Trip valve 440 in piston
The first pressure room 406 of actuator 405 on 408 the first side is communicated, and trip valve 445 with piston 408 (with
First side is opposite) the second pressure room 407 of actuator 405 in the second side communicated.Integrated fail-safe module
435 receive control signals and are also provided to locator 310, pressurized fluid from pressurized fluid source of supply 315, and should
Control signal is transmitted to locator 310.In this example, integrated fail-safe module 435 can also include one or more
Ultra low power consumes valve (for example, piezo electric valve or nozzle-baffle apparatus).In this way, integrated fail-safe module 435 can be by
The control is signal-powered.
In normal operating, integrated fail-safe module 435 is in first position, and pressurized fluid is allowed to be transmitted to
Trip valve 440,455.In addition, tripping valve 440,455 is in first position, allow the cause in locator 310 and control valve 400
Communication between dynamic device 405.
If scheduled set point is lost or be less than to the pressure of pressurized fluid, one or two tripping valve 440,455 moves
It moves to the second position, security bit is moved to which prevent the communication between locator 310 and actuator 405 and by actuator 405
It sets.
In addition, if control dropout or interruption, then the fail-safe module 435 integrated is moved to the second position,
The pressure of the pressurized fluid of tripping valve 440,445 will be supplied to be throttled to the pressure less than set point or prevent pressurized fluid stream
To tripping valve 440,445.Choke pressure prevents pressurized fluid from flowing to tripping valve 440,445, by one or two tripping valve
440,455 it is moved to the second position, which prevent the communications between locator 310 and actuator 405, and actuator 405 is moved
Move home.
With reference to figure 6, the integrated fail-safe module 500 of example is shown, it can be in the fail-safe of foregoing description
It is used in system.Integrated fail-safe module 500 generally includes ultra low power and consumes valve 505,510 (for example, guide's piezoelectricity
Valve or nozzle-baffle apparatus) and 515,520 or other pneumatic operated valve of switch valve (it can also respectively have other volume
Tank).Integrated fail-safe module 50 can also have pressure reducing valve 525.
In normal operating, ultra low power consumption valve 505,510 is signal-powered by controlling, and the control signal keeps super
Low power consumption valve 505,510 is opened.Pressurized fluid from source of pressurised fluid 530 is by pressure reducing valve 525 with by pressurized fluid
Pressure reduction consume horizontal and driving switch valve 515,520 needed for valve 505,510 to ultra low power is passed through.Switch valve 515
Will be in an open position and communicate with outlet port 535 with driving pressure fail-safe module or tripping valve, and it is ultralow
Power consumption valve 510 is by the closed position pressurized fluid is throttled to discharge port 540.When controlling dropout, surpass
Low power consumption valve 505,510 will be closed.Switch valve 515 will be closed, and ultra low power consumption valve 510 will be opened, and
Outlet port 535 and discharge port 540 will be connected.Therefore, pressurized fluid will not flow to pressure fault-security module or tripping
Valve, and control valve is driven to home.
Although various embodiments are described above, present disclosure is not intended to be limited to this.It can be public to institute
The embodiment opened is changed so that these variations are still within the scope of the appended claims.
Claims (20)
1. a kind of fail-safe system for control valve, including：
Electric signal and power failure-security module, the electric signal and power failure-security module receive control signal and pressurization
Fluid, the control signal and pressurized fluid are also provided to locator, and the electric signal and power failure-security module include super
Low power consumption valve；And
Pressure fault-security module, the pressure fault-security module and the electric signal and power failure-security module
Output communication；Wherein
In normal operating, the electric signal and power failure-security module are in first position, to allow the pressurized fluid
By the electric signal and power failure-security module to the pressure fault-security module, and the pressure fault-peace
Full module is in first position, to allow the communication between the locator and the actuator of the control valve；
When the pressure of the pressurized fluid is decreased below set point, the pressure fault-security module is moved to second
It sets, so that the actuator is moved to home；
When the control dropout or when being interrupted, the electric signal and power failure-security module are moved to the second position,
So that the pressure of the pressurized fluid throttles to below the set point or preventing the pressurized fluid to the pressure fault-peace
The flowing of full module, the throttling or the prevention make the pressure fault-security module be moved to the second position so that described
Actuator is moved to the home.
2. fail-safe system according to claim 1, wherein the ultra low power consumption valve is piezo electric valve or nozzle-
Baffle apparatus.
3. fail-safe system according to claim 1, wherein the pressure fault-security module includes switch valve.
4. fail-safe system according to claim 3, wherein the pressure fault-security module includes volume tank.
5. fail-safe system according to claim 1, wherein the actuator of the control valve is spring return function
Actuator.
6. fail-safe system according to claim 1, wherein the home is a position in following position
It sets：The fully closed position of the rearmost position of the control valve, the fully open position of the control valve or the control valve.
7. fail-safe system according to claim 1, wherein the actuator of the control valve is that double-acting is lived
Fill in actuator.
8. fail-safe system according to claim 7, wherein：
Pressure fault-the security module includes first switch valve and second switch valve, the first switch valve and described second
Each switch valve in switch valve is communicated with the output of the electric signal and power failure-security module；
The first switch valve with the actuator, the first pressure room on the first side positioned at piston communicates；And
The second switch valve with the actuator, in the second side opposite with first side positioned at the piston
Two pressure chamber communicates.
9. fail-safe system according to claim 8, wherein the first switch valve and the second switch valve point
It is not communicated with the locator.
10. fail-safe system according to claim 9, wherein the first switch valve and the second switch valve are each
From including volume tank.
11. fail-safe system according to claim 1, wherein the electric signal and power failure-security module by
The control is signal-powered.
12. a kind of fail-safe system for control valve, including：
Integrated fail-safe module, the integrated fail-safe module receive control signal and pass the control signal
It is sent to locator, and receives the pressurized fluid for being also provided to the locator, and
Trip valve, and the tripping valve is communicated with the output of the integrated fail-safe module；Wherein
In normal operating, the integrated fail-safe module is in first position, to allow the pressurized fluid transfer to arrive
The tripping valve；And the tripping valve is in first position, to allow the actuator in the locator and the control valve
Between communication；
When the pressure of the pressurized fluid is decreased below set point, the tripping valve is moved to the second position, so that described
Actuator is moved to home；
When the control dropout or when being interrupted, the integrated fail-safe module is moved to the second position with by institute
The pressure for stating pressurized fluid throttles to below the set point or preventing the pressurized fluid to the flowing of the tripping valve, described
Throttling or the prevention make the tripping valve be moved to the second position so that the actuator is moved to the home.
13. fail-safe system according to claim 12, wherein the integrated fail-safe module includes：The
One ultra low power consumes valve and the second ultra low power consumption valve, first switch valve and second switch valve.
14. fail-safe system according to claim 13, wherein first ultra low power consumption valve and described the
It is piezo electric valve or nozzle-baffle apparatus that two ultra low powers, which consume valve,.
15. fail-safe system according to claim 13, wherein the integrated fail-safe module includes volume
Tank.
16. fail-safe system according to claim 12, wherein the actuator of the control valve is that spring returns
Position actuator.
17. fail-safe system according to claim 12, wherein the home is one in following position
Position：The rearmost position of the control valve, the fully open position of the control valve or the control valve completely close position
It sets.
18. fail-safe system according to claim 12, wherein the actuator of the control valve is double-acting
Piston actuater.
19. fail-safe system according to claim 18, further includes：
Second tripping valve, the second tripping valve are communicated with the output of the integrated fail-safe module；Wherein
The tripping valve with the actuator, the first pressure room on the first side positioned at piston communicates；And
The second tripping valve with the actuator, in the second side opposite with first side positioned at the piston the
Two pressure chamber communicates.
20. fail-safe system according to claim 12, wherein the integrated fail-safe module is by the control
It makes signal-powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721119258.9U CN207676230U (en) | 2017-09-01 | 2017-09-01 | Fail-safe system for control valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721119258.9U CN207676230U (en) | 2017-09-01 | 2017-09-01 | Fail-safe system for control valve |
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| CN207676230U true CN207676230U (en) | 2018-07-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI724527B (en) * | 2018-09-10 | 2021-04-11 | 台灣積體電路製造股份有限公司 | Failsafe circuit, integrated circuit device and nodes controlling method |
| CN115398104A (en) * | 2020-04-30 | 2022-11-25 | 费希尔控制国际公司 | Method and device for quantifying pneumatic volume usage by means of a valve controller |
-
2017
- 2017-09-01 CN CN201721119258.9U patent/CN207676230U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI724527B (en) * | 2018-09-10 | 2021-04-11 | 台灣積體電路製造股份有限公司 | Failsafe circuit, integrated circuit device and nodes controlling method |
| US11263380B2 (en) | 2018-09-10 | 2022-03-01 | Taiwan Semiconductor Manufacturing Company, Ltd. | Failsafe circuit, layout, device, and method |
| CN115398104A (en) * | 2020-04-30 | 2022-11-25 | 费希尔控制国际公司 | Method and device for quantifying pneumatic volume usage by means of a valve controller |
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