CN106286905A - Redundancy air supply system for operated pneumatic valve actuator - Google Patents
Redundancy air supply system for operated pneumatic valve actuator Download PDFInfo
- Publication number
- CN106286905A CN106286905A CN201510290414.7A CN201510290414A CN106286905A CN 106286905 A CN106286905 A CN 106286905A CN 201510290414 A CN201510290414 A CN 201510290414A CN 106286905 A CN106286905 A CN 106286905A
- Authority
- CN
- China
- Prior art keywords
- relay
- valve
- time
- supply system
- operated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The redundancy air supply system for operated pneumatic valve actuator of the present invention, the input of its first and second electromagnetic valve is all connected to source of the gas, the outfan of the first and second electromagnetic valves is connected respectively to the first and second inlet ends of air operated reversing valve, the outlet side of air operated reversing valve is connected to operated pneumatic valve actuator, and control/alarm device output control signal controls relay and carries out excitation and demagnetization；The coil of the first and second electromagnetic valves is connected to power supply by the normal opened contact of described relay, is also connected in series with described time-delay relay between the coil and described relay of the second electromagnetic valve；The reset contact of time-delay relay is connected to power supply by the normally closed contact of described relay, and it starts contact and is connected to power supply by the normal opened contact of described relay.The redundancy air supply system for operated pneumatic valve actuator of the present invention is prevented from because the fault of electromagnetic valve destroys the properly functioning of system.
Description
Technical field
The present invention relates to a kind of redundancy air supply system for operated pneumatic valve actuator.
Background technology
Operated pneumatic valve is to be made up of with valve body combination actuator (thin film mechanism or cylinder mechanism),
Driving, control valve door trip or valve seat opening is reached by actuator and supporting Pneumatic component
Purpose.Owing to operated pneumatic valve fast response time, load capacity are big and feature quilt without electric terminal
It is widely used in the control system of various processing medium.The control mode of operated pneumatic valve has to be opened continuously
The switch valve that the regulation valve of degree change and ON/OFF two control, pneumatic for important loop controlling
Valve all configures the chain condition that electromagnetic valve controls as operation, and in case of emergency carries out strong
The safe control of valve position of property processed.
In the linkage control system of the operated pneumatic valve of all kinds of important technological equipment, electromagnetic valve is one
Individual important control parts.When electromagnetic valve is in excited state, Valve controlling source of the gas is switched on,
Keep valve state controlled under the effect of bleed pressure.When there is abnormality in equipment, by
The electromagnetic valve demagnetization that interlock controls, Valve controlling source of the gas is cut off, at the work of back-moving spring
Under with, valve is opened or closed and makes equipment be kept safe.
Owing to electromagnetic valve is long-term parts by electrical excitation, produced the same of electromagnetic force by electricity
Time, a part of electric energy is consumed with the form producing heat, is in the electricity under long-term fever state
Magnet valve magnet exciting coil, its dielectric is made its decreasing insulating by the most aging, ultimately results in
The partial short-circuit of magnet exciting coil or coil open circuit, cause the fault of solenoid valve body.Electromagnetic valve one
Denier breaks down, and the valve position state of operated pneumatic valve will change, owing to being non-technology controlling and process need
The valve position change wanted and occur, causes life by causing production equipment because of the misoperation of valve
Production. art exception or stopping accident.
Therefore, in operated pneumatic valve control system, other Pneumatic components relatively, electromagnetic valve is event
The parts that barrier risk is the highest.Owing to electromagnetic valve can be made to sentence without outward appearance during deterioration quantitative change
Disconnected foundation, and without effective detection method in running.Therefore, the event of electromagnetic valve
Barrier occurs often to have sudden, owing to relating to electricity, the opening of gas medium in fault treating procedure
Stop making the upkeep operation time longer, bring greater impact to the seriality produced, also improve
The cost produced.
Operated pneumatic valve is a visual plant in modernization industrial automation control system, its work
State will be directly connected to the normal and stable of whole production system, it is therefore desirable to a kind of for gas
The redundancy air supply system of movable valve actuator, it is possible to be effectively prevented from owing to source of the gas controls parts
Exception and cause the stopping production fault of production system.
Summary of the invention
To this end, the invention provides a kind of redundancy air supply system for operated pneumatic valve actuator,
Including the first and second electromagnetic valves, air operated reversing valve, time-delay relay, relay and control
System/alarm device, the input of described first and second electromagnetic valves is all connected to source of the gas, and described
One and second the outfan of electromagnetic valve be connected respectively to the first and second of described air operated reversing valve and enter
Gas end, the outlet side of described air operated reversing valve is connected to operated pneumatic valve actuator, wherein, institute
Stating the first outfan output control signal of control/alarm device, the coil of described relay connects
To described control signal, described control signal controls described relay and carries out excitation and demagnetization；Institute
The coil stating the first and second electromagnetic valves is connected to power supply by the normal opened contact of described relay,
Between the coil and described relay of described second electromagnetic valve, also it is connected in series with described time delay continue
Electrical equipment；The reset contact of described time-delay relay is connected to by the normally closed contact of described relay
Power supply, it starts contact and is connected to power supply by the normal opened contact of described relay.This supply system
System also includes being connected in series in the bypass relay at described time-delay relay two ends.
Further, described control/alarm device includes: be connected to described air operated reversing valve
The first and second pressure switches of the first and second inlet ends, described first and second pressure are opened
Pass is less than it each at the gas pressure of the first and second inlet ends of described air operated reversing valve respectively
The force value of setting time connect, more than or equal to time disconnect；Alarm module, it is described
One or second pressure switch connect time by described detection alarm second outfan output warning
Information.
Further, described control/alarm device also include first and second time delays connect modules,
And signal control relay, the coil of described signal control relay is by described relay
3rd normal opened contact is connected to accessory power supply；First and second time delays are connected the reset terminal of module and are divided
It is not connected to high level by two normally closed contacts of the intermediate contact of described control/alarm device,
Its input is respectively by two input contacts and first and second of described control/alarm device
Pressure switch is connected to high level, and its outfan is all connected to the input of described alarm module,
Described alarm module is when the outfan output high level of module is connected in described first and second time delays
Output warning message.
Preferably, at input and the outfan of described first and second electromagnetic valves, set the most respectively
It is equipped with manually-operated gate.Outfan at described source of the gas is also associated with air relief valve, and described source of the gas exports
Gas through described air relief valve enter described first and second electromagnetic valves.Described warning message is
Audible alarm information and/or light warning message.
The redundancy air supply system for operated pneumatic valve actuator of the present invention, uses two electromagnetism
Valve is controlled by same control signal, is controlled the valve state of air operated reversing valve simultaneously,
When needs change valve state, two electromagnetic valves excitation or demagnetizations simultaneously.Under normal circumstances,
Connected Valve controlling source of the gas by an electromagnetic valve therein, changed by pneumatic when it breaks down
Automatically switch to valve and kept the connection of Valve controlling source of the gas by another electromagnetic valve, make valve keep
Normal controlled state.This redundancy air supply system being used for operated pneumatic valve actuator is prevented from
Because the fault of electromagnetic valve destroys the normal control of system.
Accompanying drawing explanation
Fig. 1 is that the structure for the redundancy air supply system of operated pneumatic valve actuator of the present invention is shown
It is intended to；
Fig. 2 is the redundancy air supply system repeat circuit for operated pneumatic valve actuator of the present invention
Connection diagram with time-delay relay；
Fig. 3 be the present invention the redundancy air supply system for operated pneumatic valve actuator in detection report
The structural representation of alert device.
Detailed description of the invention
Below in conjunction with the accompanying drawings with detailed description of the invention to the present invention for operated pneumatic valve actuator
Redundancy air supply system be described in further detail, but not as a limitation of the invention.
With reference to Fig. 1-2, the redundancy air supply system for operated pneumatic valve actuator of the present invention, bag
Include the first and second electromagnetic valve SV1, SV2, air operated reversing valve HXV, time-delay relay RT,
Relay R 0 and control/alarm device.
Wherein, the input of first and second electromagnetic valve SV1, SV2 is all connected to source of the gas P.S.
(outfan of source of the gas P.S. can connect air relief valve, in order to adjust the gas pressure of output
Whole), the outfan of first and second electromagnetic valve SV1, SV2 is connected respectively to air operated reversing valve
First and second inlet ends 1,2 of HXV, the outlet side 3 of air operated reversing valve is connected to pneumatic operated valve
Door actuator (such as, the cylinder executor in figure).
First outfan output control signal of control/alarm device, the coil of relay R 0 is even
Receive this first outfan, so that the coil that this control signal can control relay R 0 enters
Row excitation and demagnetization.
The coil of the first electromagnetic valve SV1 is connected to electricity by the normal opened contact R0-1 of relay R 0
Source (such as, the 220VAC shown in figure), the reset contact RT RESET of time-delay relay RT
Being connected to power supply 220VAC by the normally closed contact R0-3 of relay R 0, it starts contact RT
START is connected to power supply 220VAC, the second electricity by the normal opened contact R0-1 of relay R 0
The coil of magnet valve SV2 is connected to power supply 220VAC by time-delay relay RT.
When the control signal of the first outfan output of control/alarm device makes relay R 0 encourage
During magnetic, the normal opened contact R0-1 Guan Bi of relay R 0, the first electromagnetic valve SV1 excitation immediately connects
Ventilation source P.S.；The normally closed contact R0-3 of relay R 0 disconnects so that time-delay relay RT's
Reset contact RT RESET disconnects, and is i.e. not at reset state；Relay R 0 is normally opened simultaneously
Contact R0-1 closes so that the startup contact RT START Guan Bi of time-delay relay RT, from
And start-up study relay R T starts timing.
Second electromagnetic valve SV2 connects due to the effect time delay of time-delay relay RT, the first electromagnetism
Valve SV1 connects excitation immediately so that power gas source P.S. is passed through the first of air operated reversing valve HXV
Inlet end 1, controls to make its spool move to B end by the inside inducing QI of air operated reversing valve HXV,
Make the first inlet end 1 and outlet side 3 UNICOM of air operated reversing valve, thus hold to operated pneumatic valve
Row mechanism supplies gas.
After the timing of time-delay relay RT reaches its delay time (such as 30 seconds) set,
Its normal opened contact RT-1 closes, and the second electromagnetic valve SV2 is connected to by this normal opened contact RT-1
Power supply and excitation, thus connect source of the gas P.S..
Connect after time-delay relay RT time delay terminates excitation, the second electromagnetic valve SV2 excitation,
Its gas circuit controlled is connected.But the gas being subject to due to the spool both sides of now air operated reversing valve HXV
Source P.S. pressure is identical, and therefore, the spool of air operated reversing valve HXV is failure to actuate, and keeps first to enter
Outlet side 3 is supplied by gas end 1.
By above description it can be seen that take the purpose of the second electromagnetic valve SV2 time delay excitation, it is
In order to avoid due to changing that the difference in volume of tow channel gas source channels during two electromagnetic valves excitation simultaneously causes
To the spool play problem of valve, thus avoid causing the discontinuous of valve event.
When the control signal of the first outfan output of control/alarm device makes relay R 0 disappear
During magnetic, its normal opened contact R0-1 disconnects, and the first electromagnetic valve SV1 demagnetization immediately the most normally opened connects
Point R0-1 disconnects so that the startup of time-delay relay RT was lost efficacy, and its normally closed contact R0-3 closes,
Time-delay relay RT is resetted, now the second electromagnetic valve SV2 also demagnetization simultaneously.
Therefore, relay is made when the control signal of the first outfan output of control/alarm device
During R0 demagnetization, first and second electromagnetic valve SV1, SV2 demagnetization simultaneously.Due to the second electromagnetic valve
The air cavity volume of the SV2 air cavity volume much smaller than the first electromagnetic valve SV1, therefore the second electromagnetic valve SV2
Being faster than the first electromagnetic valve SV1 venting pressure release, therefore the spool position of air operated reversing valve HXV is protected
Hold constant, treat the first electromagnetic valve SV1 pressure release late gate action.
When the control signal of control/alarm device output makes relay R 0 excitation again, weight
Multiple said process.
As seen from the above description, the redundancy for operated pneumatic valve actuator using the present invention supplies
Gas system, the control of state that generally uses on redundancy air supply system does not affect, i.e. at electromagnetism
In the case of valve is normal, it is ensured that by an electromagnetic valve (such as, the first electromagnetic valve SV1)
Operated pneumatic valve actuator is supplied.
In order to the pressure of the two-way source of the gas of first and second electromagnetic valve SV1, SV2 supply is carried out
Monitoring, control/alarm device includes the first and second pressure switches PS1, PS2 and warning mould
Block.First and second pressure switches PS1, PS2 are connected to the of air operated reversing valve HXV
One and second inlet end 1,2, when first and second inlet ends 1,2 of air operated reversing valve HXV
Gas pressure less than the first and second pressure switches PS1, PS2 the force value of setting time, the
One connects with the second pressure switch PS1, PS2, disconnects during more than or equal to the force value set.
Alarm module passes through control/alarm device when the first or second pressure switch PS1, PS2 connect
Second outfan output sound, light etc. warning message.
In normal running, the demagnetization if the second electromagnetic valve SV2 breaks down, second
The spool of electromagnetic valve SV2 makes it export under its spring effect and diffuses UNICOM so that outlet pressure
Power reduces.And now the output pressure of the first electromagnetic valve SV1 is normal, therefore air operated reversing valve HXV
Spool position keep constant, the pressure of the power gas source of operated pneumatic valve actuator is kept not
Become, valve is not produced the impact of action.
Owing to the output pressure of the second electromagnetic valve SV2 reduces so that air operated reversing valve HXV's
The air pressure of the second inlet end 2 is to the setting value less than pressure switch PS2, and pressure switch PS2 connects
Logical, control/alarm device output sound and light alarm information.
Similarly, after the first electromagnetic valve SV1 breaks down demagnetization, the first electromagnetic valve SV1's
When outlet pressure decreases below the outlet pressure 50kPa of the second electromagnetic valve SV2, the second electromagnetism
The bleed pressure of valve SV2 promotes the valve core movement of air operated reversing valve HXV to A end, and it is right to complete
The air supply channel conversion of operated pneumatic valve actuator.Spool friction due to air operated reversing valve HXV
Coefficient is less, and spool conversion can complete in moment, and therefore the action to valve changes and will not produce
Raw abnormal phenomena.
When the outlet pressure of the first electromagnetic valve SV1 is reduced to the setting value of pressure switch PS1,
Pressure switch PS1 is connected, control/alarm device output sound and light alarm information.
In order to ensure that control/alarm device does not carries out false alarm, reference to the low-pressure started when ventilating
Fig. 3, this control/alarm device also includes that the first and second time delays connection modules T1, T2 are (permissible
Connect back off timer with S-ODT to realize) and signal control relay R1, the line of R1
Circle is connected to accessory power supply (such as, the 24VDC in figure) by the 3rd normal opened contact of relay.
Preferably, control/alarm device is realized by PLC.First and second time delays connection modules T1,
The reset terminal of T2 is connected to high level by two normally closed contacts of the intermediate contact of PLC respectively,
Its input respectively by two of PLC input contacts and the first and second pressure switches PS1,
PS2 is connected to high level, and its outfan is all connected to the input of alarm module, and alarm module exists
Output alarm signal when the outfan output high level of module T1, T2 is connected in first and second time delays
Breath.
When control/alarm device output control signal control the first and second electromagnetic valve SV1,
During SV2 excitation, signal control relay R1 also excitation, its normal opened contact R1-1 closes, connects
Numeral input (DI) terminal of point signal input PLC makes PLC input contact I0.0 Guan Bi, logical
Crossing intermediate contact M0.0 makes its normally closed contact M0.1 and M0.2 disconnect, release first and the
The reset of module is connected in two time delays.Due to the now source of the gas P.S. valve to air operated reversing valve HXV
Cylinder charge, pressure is in ascent stage, and bleed pressure not yet reaches the first and second pressure and opens
Close the setting value of PS1, PS2, but the most should not trigger alarm module and report to the police, therefore
The first and second time delays are needed to connect module T1, the existence of T2.Now the first and second pressure are opened
Close PS1, PS2 to connect so that input contact I1.0 and the I2.0 Guan Bi of PLC, intermediate contact
Normal opened contact M0.3 and the M0.4 Guan Bi of M0.0, the first and second time delays connection modules T1,
The input S of T2 is in high level, and due to the first and second time delays connect modules T1,
The reset terminal R of T2 is released, and module T1 is connected in the first and second time delays, T2 carries out time delay
Connect timing.Connect module due to time delay and be output as low electricity at time delay timing stage outfan Q
Flat, the signal therefore sending into PLC alarm module is also low level, will not trigger warning.
In order to ensure to shield the effective of alarm circuit at delay stage, wherein the first time delay is connected
The delay adjustments of module T1 is 30 seconds, and it is 35 that the delay adjustments of module T2 is connected in the second time delay
Second.
If in time delay, the pressure of input source of the gas has been raised to the setting value of pressure switch,
Then pressure switch disconnects so that input contact I1.0 and I2.0 of PLC also disconnects, first and the
Module T1 is connected in two time delays, the input S of T2 is in low level, and outfan Q is also low
Level, the most also will not trigger alarm module and report to the police.
When control/alarm device output control signal control the first and second electromagnetic valve SV1,
During SV2 demagnetization, signal control relay R1 also demagnetization, its normal opened contact R1-1 disconnects and making
The input contact I0.0 of PLC disconnects, and makes its normally closed contact M0.1 by intermediate contact M0.0
Close with M0.2, make the first and second time delays connect module T1, T2 reset, contact simultaneously
M0.3 and M0.4 disconnects, and the input of alarm module disconnects, and bleed pressure is not reported to the police.
In above circuit connection structure ensure that the time delay after electromagnetic valve excitation and at electricity
After magnet valve demagnetization, when bleed pressure is less than the setting pressure of pressure switch, do not trigger alarm module
Report to the police.
When electromagnetic valve normal excitation con-trol valve, owing to the fault of one of them electromagnetic valve causes
During the low setting value with pressure switch PS of this road bleed pressure, pressure switch PS junction closure,
Module S-ODT connected due to time delay and keep has been in the connection hold mode after time delay, and
In an ON state, therefore M1.0 is passed through in its output to the contact of signal control relay R1 immediately
Or M2.0 starts PLC warning system and carries out sound and light alarm.
Additionally, for the fault preventing time-delay relay RT, control/alarm device also includes side
Logical relay R.If time-delay relay RT not can turn on after time delay terminates, connect in time delay
After module time delay terminates, M2.1 junction closure, control signal makes signal control relay R1 close
After conjunction, its contact M0.5 also closes, and drives bypass relay R excitation, bypasses relay R
Connect the energized circuit of the second electromagnetic valve SV2, it is ensured that the second electromagnetic valve SV2 excitation.Due to side
Logical relay R has self-locking circuit, therefore can change time-delay relay RT online.Complete
Change time-delay relay RT and complete delay parameter setting, after its delay time reaches, pressing
SR RESET switchs, and can release bypass relay R.
In order to ensure to be easy to when electromagnetic valve breaks down change online, with reference to Fig. 1, at each electricity
The both sides of magnet valve respectively arrange a manually-operated gate.As it can be seen, before the first electromagnetic valve SV1
After hand-operated valve HV1, HV2 are set, arrange before and after the second electromagnetic valve SV2 manually-operated gate HV3,
HV4.After closing the hand-operated valve on both sides, corresponding electromagnetic valve can be changed online.
After certain electromagnetic valve is changed, if control signal is not changed, then another electromagnetic valve can be always
Keep for gaseity, thus keep the supply of redundancy air supply system to stablize.
In order to ensure stablizing of supply, the setting to the delay time of time-delay relay RT, need
Volume according to operated pneumatic valve actuator is different and different.Operated pneumatic valve actuator because of
The load of control object is different, and the thrust of actuator output is the most different, the therefore body of its air cavity
Amass and also differ.Operated pneumatic valve actuator is that the instruction according to control signal is inflated action
Or venting resets, because always being also existed corresponding by throttling units various in gas circuit, the effect of parts
Fill, have when exitting one correspondingly ascending, descending in the time press through journey, operated pneumatic valve is held
The filling of row mechanism, deflation time is as the increase of its volume and extends.
Owing to the spool of air operated reversing valve HXV is always at an input and output UNICOM, and another
The state that one input disconnects with output so that the air cavity volume corresponding to two inputs is different,
When electromagnetic valve is excited and inflates air cavity, the speed that the pressure of change-over valve core both sides rises is not
With, the pressure reduction of formation will cause the vibration vibration of spool, causes the action of valve actuator
Discontinuous.The volume of operated pneumatic valve actuator is the biggest, and this pressure reduction phenomenon is the most notable.
Valve actuator air cavity inflation boost process time t is calculated by following formula:
Wherein PsAbsolute pressure (MPa), P for source of the gas1For actuator gas
Intracavity initial absolute pressure (MPa), τ are the time constant (s) of inflation and venting.
The filling of air cavity, deflation time constant, τ is calculated by following formula:
Wherein, V be the volume (L) of actuator air cavity, S be effective
Sectional area (mm2), K be the negotiability (m of changement3/h)。
Valve actuator, during controlling valve plate change, moves in its actuator air cavity
The motion change of parts (thin film or piston) is (to be carried valve plate active force by spring and pipeline medium
Load forces) effect, the change of the moving component position in actuator air cavity is its both sides stress
Size and change, the speed of its motion is proportional to the pressure differential of moving component both sides.But due to
Spring force and the existence of valve loading force, when initial position, the volume of its air cavity is relatively in actuator
Little, therefore when air cavity is inflated, pressure rises is rapid.
Reversal valve, electromagnetic valve and connection pipeline thereof are as the entirety of a changement, its fluid
Negotiability can be considered a specific constant.The aperture d that flows through of changement is φ 3mm,
Its name sectional area S0For:
Its constriction coefficient α is slightly less than 0.6, now takes 0.6.
The net sectional area S flowing through aperture is:
S=α S0=0.6 × 7.065=4.239 (mm2),
Compressed air is 300mm by changement to an internal diameter, and height be 450mm, its appearance
When 32 liters of containers of long-pending approximation are reached 0.5MPa gauge pressure by atmospheric pressure pressurising, need after measured time
Between be about 7.5 seconds, then the timeconstantτ of changement is:
Accordingly, being in terms of 20 DEG C by ambient temperature, negotiability K of changement is:
For changement, due to its mechanism it has been determined that therefore its negotiability can be considered that it is special
Property characterize a constant, therefore when changement coordinates with the most isometric actuator,
There are different time constants and the time filled, exit, thus can set as electromagnetic valve delay time
Fixed basic foundation, also needs introducing to overcome operated pneumatic valve to perform machine when concrete setting delay time
Time delay produced by the mechanism kinematic resistance that the counter spring force of structure causes.
Such as Baosteel energy ring portion Wide and Thick Slab recirculated water milling train accident water tower discharging valve, in single electromagnetic valve control
When valve processed is opened, its movement velocity by fully closed to standard-sized sheet be 12 seconds, use redundancy supply time,
The delay time of time-delay relay is set as 20 seconds, and the action of valve can meet technological requirement.Right
In the valve actuator of big volume, Pneumatic pilot valve can be controlled to increase pneumatic operated valve by electromagnetic valve
The flux of the power gas source change of door actuator, accelerates the action of valve.
The actually used present invention when the redundancy air supply system of operated pneumatic valve actuator, can
With the characteristic according to operated pneumatic valve actuator and air operated reversing valve, carry out the examination of delay parameter
Test, to obtain the delay adjustments value of most suitable time-delay relay.
Electromagnetic valve breaks down the most unpredictable in actual use, but one
Denier breaks down the exception by directly causing whole system, makes the hazardness of fault expand.Pass through
After important valve source of the gas is taked redundant supply to control by air operated reversing valve, electromagnetic valve is made to send out
Make another electromagnetic valve can substitute fault electricity the most in time due to the effect of reversal valve during raw fault
Magnet valve, keeps valve state not change, thereby guarantees that stablizing of whole control system.
Above detailed description of the invention is only the illustrative embodiments of the present invention, it is impossible to be used for limiting
The present invention, protection scope of the present invention is defined by the claims.Those skilled in the art are permissible
In the essence and protection domain of the present invention, the present invention is made various amendment or equivalent,
These amendments or equivalent also should be regarded as being within the scope of the present invention.
Claims (7)
1. the redundancy air supply system for operated pneumatic valve actuator, it is characterised in that bag
Include the first and second electromagnetic valves, air operated reversing valve, time-delay relay, relay and control/
Alarm device,
The input of described first and second electromagnetic valves is all connected to source of the gas, and described first and second
The outfan of electromagnetic valve is connected respectively to the first and second inlet ends of described air operated reversing valve, institute
State the outlet side of air operated reversing valve and be connected to operated pneumatic valve actuator, wherein,
First outfan output control signal of described control/alarm device, the line of described relay
Circle is connected to described control signal, and described control signal controls described relay and carries out excitation and disappear
Magnetic；
The coil of described first and second electromagnetic valves is connected to by the normal opened contact of described relay
Power supply, is also connected in series with described between the coil and described relay of described second electromagnetic valve
Time-delay relay；
The reset contact of described time-delay relay is connected to electricity by the normally closed contact of described relay
Source, it starts contact and is connected to power supply by the normal opened contact of described relay.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 1,
It is characterized in that, described control/alarm device includes:
It is connected to the first and second pressures of the first and second inlet ends of described air operated reversing valve
Power switchs, and described first and second pressure switches are respectively at the first and the of described air operated reversing valve
The gas pressure of two inlet ends is connected when being less than the force value of its respective setting, is more than or equal to
Time disconnect；
Alarm module, its described first or second pressure switch connect time by described control/report
Second outfan output warning message of alarm device.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 2,
It is characterized in that, described control/alarm device also include first and second time delays connect modules, with
And signal control relay,
The coil of described signal control relay is connected by the 3rd normal opened contact of described relay
To accessory power supply；
First and second time delays connect the reset terminal of module respectively by described control/alarm device
Two normally closed contacts of intermediate contact are connected to high level, its input respectively by described control/
Two input contacts of alarm device and the first and second pressure switches are connected to high level, its
Outfan is all connected to the input of described alarm module,
Described alarm module connects the high electricity of outfan output of module in described first and second time delays
Export warning message at ordinary times.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 1,
It is characterized in that, this air supply system also includes the side being connected in series in described time-delay relay two ends
Logical relay.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 1,
It is characterized in that, at input and the outfan of described first and second electromagnetic valves, set the most respectively
It is equipped with manually-operated gate.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 1,
It is characterized in that, the outfan at described source of the gas is also associated with air relief valve, the output of described source of the gas
Gas enters described first and second electromagnetic valves through described air relief valve.
Redundancy air supply system for operated pneumatic valve actuator the most according to claim 2,
It is characterized in that, described warning message is audible alarm information and/or light warning message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290414.7A CN106286905B (en) | 2015-05-29 | 2015-05-29 | Redundancy air supply system for operated pneumatic valve executing agency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290414.7A CN106286905B (en) | 2015-05-29 | 2015-05-29 | Redundancy air supply system for operated pneumatic valve executing agency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106286905A true CN106286905A (en) | 2017-01-04 |
| CN106286905B CN106286905B (en) | 2018-10-02 |
Family
ID=57655608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510290414.7A Active CN106286905B (en) | 2015-05-29 | 2015-05-29 | Redundancy air supply system for operated pneumatic valve executing agency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106286905B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524671A (en) * | 2020-11-26 | 2021-03-19 | 国核电力规划设计研究院有限公司 | Heat storage tank system |
| WO2022105488A1 (en) * | 2020-11-17 | 2022-05-27 | 宁夏佰斯特医药化工有限公司 | Intelligent fireproof pneumatic actuating mechanism for valve |
| CN114783717A (en) * | 2022-06-17 | 2022-07-22 | 山东奥新医疗科技有限公司 | Magnetic resonance system and quench protection device of superconducting magnet thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5561976A (en) * | 1994-10-13 | 1996-10-08 | General Electric Company | Redundant trip solenoid valve shut-off for gas turbine fuel system |
| CN2557909Y (en) * | 2002-07-24 | 2003-06-25 | 宝山钢铁股份有限公司 | Automatic blocking-resistant spray-repairing machine |
| CN201992174U (en) * | 2010-12-23 | 2011-09-28 | 天津精通控制仪表技术有限公司 | Air line structure of air storage type pneumatic actuating mechanism |
| CN202441930U (en) * | 2011-12-21 | 2012-09-19 | 中国核动力研究设计院 | Intelligent electromagnetic safety valve |
| KR20120113889A (en) * | 2011-04-06 | 2012-10-16 | 현대중공업 주식회사 | Solenoid valve module providing air |
| CN102758950A (en) * | 2012-07-25 | 2012-10-31 | 欧好光电控制技术（上海）有限公司 | Electromagnetic coil device comprising energy storage shutdown valve module |
| CN203363670U (en) * | 2013-05-24 | 2013-12-25 | 上海卫星装备研究所 | Automatic monitoring alarm nitrogen blowing device |
| CN103821996A (en) * | 2014-02-27 | 2014-05-28 | 辽宁工程技术大学 | Electromagnetic directional valve group controller and control method thereof |
| CN203686298U (en) * | 2013-12-31 | 2014-07-02 | 内蒙古大唐国际托克托发电有限责任公司 | Dome valve control device |
| CN203771031U (en) * | 2014-03-24 | 2014-08-13 | 北京航天发射技术研究所 | Backup-redundancy pressure reduction gas supply loop |
-
2015
- 2015-05-29 CN CN201510290414.7A patent/CN106286905B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5561976A (en) * | 1994-10-13 | 1996-10-08 | General Electric Company | Redundant trip solenoid valve shut-off for gas turbine fuel system |
| CN2557909Y (en) * | 2002-07-24 | 2003-06-25 | 宝山钢铁股份有限公司 | Automatic blocking-resistant spray-repairing machine |
| CN201992174U (en) * | 2010-12-23 | 2011-09-28 | 天津精通控制仪表技术有限公司 | Air line structure of air storage type pneumatic actuating mechanism |
| KR20120113889A (en) * | 2011-04-06 | 2012-10-16 | 현대중공업 주식회사 | Solenoid valve module providing air |
| CN202441930U (en) * | 2011-12-21 | 2012-09-19 | 中国核动力研究设计院 | Intelligent electromagnetic safety valve |
| CN102758950A (en) * | 2012-07-25 | 2012-10-31 | 欧好光电控制技术（上海）有限公司 | Electromagnetic coil device comprising energy storage shutdown valve module |
| CN203363670U (en) * | 2013-05-24 | 2013-12-25 | 上海卫星装备研究所 | Automatic monitoring alarm nitrogen blowing device |
| CN203686298U (en) * | 2013-12-31 | 2014-07-02 | 内蒙古大唐国际托克托发电有限责任公司 | Dome valve control device |
| CN103821996A (en) * | 2014-02-27 | 2014-05-28 | 辽宁工程技术大学 | Electromagnetic directional valve group controller and control method thereof |
| CN203771031U (en) * | 2014-03-24 | 2014-08-13 | 北京航天发射技术研究所 | Backup-redundancy pressure reduction gas supply loop |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105488A1 (en) * | 2020-11-17 | 2022-05-27 | 宁夏佰斯特医药化工有限公司 | Intelligent fireproof pneumatic actuating mechanism for valve |
| CN112524671A (en) * | 2020-11-26 | 2021-03-19 | 国核电力规划设计研究院有限公司 | Heat storage tank system |
| CN112524671B (en) * | 2020-11-26 | 2022-05-31 | 国核电力规划设计研究院有限公司 | Heat storage tank system |
| CN114783717A (en) * | 2022-06-17 | 2022-07-22 | 山东奥新医疗科技有限公司 | Magnetic resonance system and quench protection device of superconducting magnet thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106286905B (en) | 2018-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106286905A (en) | Redundancy air supply system for operated pneumatic valve actuator | |
| KR102316256B1 (en) | Dual trip manifold assembly for turbine systems | |
| US11958718B2 (en) | Multi-channel impact-resistant intelligent-constant-deceleration hydraulic braking system | |
| CN205976869U (en) | Automatically controlled emergency vehicle door controller of passenger train | |
| CN113460022B (en) | Fault detection method for airplane wheel braking system | |
| CN107771238A (en) | System and method for handling overcurrent and undercurrent situation in underwater control subsystem component | |
| US20220162038A1 (en) | System and method for hydraulic-pneumatic drive with energy storage for elevators | |
| CN208978864U (en) | A kind of subway train electropneumatic emergency braking apparatus | |
| JP5160685B2 (en) | Control device and control method for rapid closing valve of steam turbine | |
| CN110526052B (en) | Actuator control system | |
| CN101868633B (en) | High throughput double valve with reduced outlet pressure during a faulted state | |
| CN216768524U (en) | Control gas circuit and valve control assembly of pneumatic actuating mechanism | |
| CN202484392U (en) | Driving device for slow-opening and fast-closing safety valve | |
| CN210591915U (en) | Train control system and train | |
| CN208651491U (en) | A kind of mechanical brake device suitable for pump-storage generator | |
| CN113324160A (en) | Pressure tank oil supply system of oil film bearing lubrication pump station | |
| CN102518858A (en) | Air pressure overload protection device | |
| CN111322451B (en) | Gas-liquid linkage actuating mechanism | |
| CN205446223U (en) | Prevent hydraulic control return circuit of decompression | |
| CN114673701A (en) | Control method and loop for controlling shutter of pneumatic nuclear source device to be closed | |
| JP2005032008A (en) | Operation control device | |
| CN211574371U (en) | PST control mechanism of PTA oxidation reactor emergency switching valve | |
| CN116905603A (en) | Bucket out-of-control protection system and method caused by mining excavator gas circuit fault | |
| CN102606787A (en) | Driving device and driving method for slow-opening quick-closing safety valve | |
| US20220145774A1 (en) | Self contained hydraulic lock apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |