CN107178654A - A kind of regulating valve realizes the device and method of double loop automatic switchover regulation - Google Patents
A kind of regulating valve realizes the device and method of double loop automatic switchover regulation Download PDFInfo
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- CN107178654A CN107178654A CN201710627719.1A CN201710627719A CN107178654A CN 107178654 A CN107178654 A CN 107178654A CN 201710627719 A CN201710627719 A CN 201710627719A CN 107178654 A CN107178654 A CN 107178654A
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- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
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Abstract
The invention discloses the device and method that a kind of regulating valve realizes double loop automatic switchover regulation, overcome in the prior art, the problem of industrial control field still has deficiency.Control loop contains the first two-bit triplet magnetic valve in the invention, valve positioner, converter, regulating valve, second two-bit triplet magnetic valve, the entrance connection source of the gas of wherein the first two-bit triplet magnetic valve, the entrance of the first outlet connecting valve locator of first two-bit triplet magnetic valve, the second outlet of first two-bit triplet magnetic valve connects the entrance of converter, the first entrance of the second two-bit triplet magnetic valve of outlet connection of converter, the second entrance of the second two-bit triplet magnetic valve of outlet connection of valve positioner, the pressure signal input port of the adjusting film head of the outlet connection regulating valve of second two-bit triplet magnetic valve.The present invention realizes the double loop automatic switchover regulation of regulating valve, reduces all kinds of accidents because of caused by electropneumatic valve positioner failure and regulation control loop exception and occurs.
Description
Technical field
The present invention relates to industrial control field, more particularly to a kind of regulating valve realizes the dress of double loop automatic switchover regulation
Put and method.
Background technology
With the fast development of the industries such as petrochemical industry, smelting, what pneumatic control valve had been obtained is widely applied.In process control
In system, pneumatic control valve serves extremely critical effect as the final control unit in control system.And valve positioner
Using industrial automation control system DCS output signals as Setting signal, with feedback letter of the regulating valve rod displacement as input
Number it is compared, when both have deviation, changes the output signal for itself arriving regulating-valve actuator, make regulating-valve actuator
Action, establishes the one-to-one relationship of regulating valve rod displacement signal and DCS control system output signals.Therefore, valve is fixed
Position device composition is output as the feedback control system of setting signal with DCS control systems using regulating valve rod displacement as measurement signal,
Its function plays vital effect equivalent to the brain and nerve center of regulating valve in whole regulating system.So close
The equipment of key has only carried out separate unit setting in current industrial automation production field, and valve positioner and its controls back
Various failures occur in road during production application, unavoidably, and the safety in production to petrochemical industry, smelting industry process units is made
Into large effect.My company and other fraternal enterprises repeatedly occurred because of valve positioner failure or regulating loop reason
Caused by all kinds of production accidents occur, the lighter impacts to product quality or production system, and severe one causes whole production
Device stops, at the same also occurred because PROCESS FOR TREATMENT not in time caused by the larger secondary accident of safety and environmental protection etc..In order to protect
The continuous production of industrial automation process units is demonstrate,proved, loss and reduction accident rate is reduced as far as possible for enterprise, key is adjusted
The safety and stability long-term operation of section system seems particularly critical and important, the drawbacks of in order to solve above Single Loop Control System
With hidden danger principle, spy proposes the technical program.
The content of the invention
Instant invention overcomes in the prior art, the problem of industrial control field still has not enough and design defect there is provided
A kind of regulating valve simple in construction, easy to use realizes the device and method of double loop automatic switchover regulation.
The technical solution of the present invention is to provide a kind of regulating valve with following structure and step and realizes double loop certainly
The device and method of dynamic switching regulation：A kind of regulating valve realizes that double loop is automatically switched the device of regulation, containing control loop and
Circuit is adjusted, control loop contains the first two-bit triplet magnetic valve, valve positioner, converter, regulating valve, the second two-bit triplet
The entrance connection source of the gas of magnetic valve, wherein the first two-bit triplet magnetic valve, the first outlet connection of the first two-bit triplet magnetic valve
The entrance of valve positioner, the second outlet of the first two-bit triplet magnetic valve connects the entrance of converter, and the outlet of converter connects
The first entrance of the second two-bit triplet magnetic valve is connect, the second of the second two-bit triplet magnetic valve of outlet connection of valve positioner enters
Mouthful, the pressure signal input port of the adjusting film head of the outlet connection regulating valve of the second two-bit triplet magnetic valve；Regulation circuit contains
DCS controllers, control signal AO1, control signal AO2, output signal DO1, output signal DO2, input signal AI1, input letter
Number AI2, wherein AO1 are that to adjust the control signal of valve positioner, AO2 in circuit be that the control signal of converter, DO1 are first
The control signal of two-bit triplet magnetic valve, DO2 are that the control signal of the second two-bit triplet magnetic valve, AI1 are controlled variable detection
Transmitter is input to the signal of DCS controllers, and AI2 is that the displacement of valve rod feed back input that valve positioner is detected is controlled to DCS
The signal of device, during normal work, output control signal AO1 on DCS controller AO1 cards, AO1 access valve positioners, valve is fixed
The displacement of valve rod signal AI2 and AO1 that detect are compared by position device；Controlled variable detects the output signal of transmitter simultaneously
On the AI1 cards of AI1 feeding DCS controllers, the Setting signal of AI1 signals and controller is compared；Where valve positioner
During control loop dysregulation, output control signal DO1 on DCS controller DO1 cards, it is linked into the first two-bit triplet magnetic valve
In, output control signal DO2 on DCS controller DO2 cards, it is linked into the second two-bit triplet magnetic valve；DCS controllers AO2
Output control signal AO2 on card, it accesses in converter to control to adjust valve.
Preferably, the first two-bit triplet magnetic valve, the second two-bit triplet magnetic valve manner of execution be, when obtaining electrical excitation
1-2 leads to, and gas circuit signal connects valve positioner regulating loop；2-3 leads to during dead electricity non-excitation, and gas circuit signal connects converter regulation
Loop.
Preferably, the converter is electropneumatic transducer or electro-control converter.
Preferably, the control loop is Pneumatic control circuit or hydraulic control circuit, and the converter corresponding to it is electricity
Gas converter or electro-control converter.
Preferably, the entrance connection source of the gas pressure-reducing valve or hydraulic relief valve of the first two-bit triplet magnetic valve.
A kind of regulating valve for the device that double loop automatic switchover regulation is realized comprising regulating valve realizes that double loop is automatically switched
The method of regulation, it is as follows that it includes the step of initial debugging and on-line debugging, initial debugging：
1st, opening source of the gas ensures that gas circuit signal is normal, forces SV1, SV2 magnetic valve to obtain electrical excitation on DCS controllers, passes through DCS
Controller manual setting valve positioner signal, to check whether control valve opening corresponds to, if correspondence explanation valve positioner work
Make normal, debugging valve positioner is allowed to correspondence again if not corresponding to.
2nd, under conditions of valve positioner normal work is ensured, SV1, SV2 magnetic valve is forced to lose on DCS controllers
Electricity, makes gas circuit signal be switched to converter control loop, and regulating valve is checked by DCS controller manual setting transducer signals
Whether aperture corresponds to, if correspondence explanation converter is working properly, debugging converter is allowed to correspondence again if not corresponding to.
The step of on-line debugging, is as follows：
Step 1, open source of the gas and ensure that gas circuit signal is normal, the first two-bit triplet magnetic valve SV1, the are forced on DCS controllers
Two two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, by DCS controller manual setting valve positioner signals, to check
Whether control valve opening is corresponded to, if correspondence explanation valve positioner is working properly, valve positioner is debugged again if not corresponding to
It is allowed to correspondence；
Step 2, under conditions of valve positioner normal work is ensured, the first two-bit triplet electromagnetism is forced on DCS controllers
Valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valve dead electricity, make gas circuit signal be switched to converter control loop, pass through DCS
Controller manual setting transducer signal checks whether control valve opening corresponds to, if correspondence explanation converter is working properly, if
It is not corresponding that then debugging converter is allowed to correspondence again.
The step of on-line debugging, is as follows：
Step 1, simulation valve positioner regulating loop fault test：Valve positioner control loop is put into first, is controlled by DCS
Processing procedure sequence makes the first two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, re-test valve
The displacement of valve rod AI2 feedback signals that locator is detected；
Step 2, artificially valve positioner is broken down, allow regulating valve abnormal operation, the feeding DCS controls of AI2 feedback signals occur
One abnormal signal of device processed, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signal outputs, now
First two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatically switch to another conversion
Device regulating loop is controlled regulation to pneumatic control valve；
There is surge in step 3, the control of simulation valve positioner, stroke is not enough, linear bad, and controlled variable regulation is unstable, with
When prescribed skew is excessive, the debugging of automatic switchover regulating loop：Valve positioner control loop is put into, is made by DCS control programs
First two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, then re-test controlled variable
Control loop is put into automatic running by transmitter device AI1 input signals, DCS controllers, then gives step by DCS controllers
Disturbance makes range of disturbance exceed setting deviation, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signals
Export, now the first two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatic undisturbed
Ground is switched to another converter regulating loop and regulation is controlled to pneumatic control valve.
Preferably, the given step disturbance gives step disturbance or by HART475 manual operators existing by DCS system
Field strength, which is set up, determines controlled variable transmitter output signal.
Compared with prior art, regulating valve of the present invention realize double loop automatically switch regulation device and method have it is following
Advantage：The present invention is successfully applied to after mechanized production system, by repeatedly on probation and test, using effect is good.Success
The double loop automatic switchover regulation of regulating valve is realized, the on-line operation effect of regulating valve is greatly improved, is effectively reduced
All kinds of accidents because of caused by electropneumatic valve positioner failure and regulation control loop exception occur, for my company's production system
Safety and stability long-term operation provide sound assurance.
Brief description of the drawings
Fig. 1 is the structural representation that regulating valve of the present invention realizes device in the device and method that double loop automatic switchover is adjusted
Figure；
Fig. 2 is that regulating valve of the present invention realizes that the signal in the device and method of double loop automatic switchover regulation flows to schematic diagram one；
Fig. 3 is that regulating valve of the present invention realizes that the signal in the device and method of double loop automatic switchover regulation flows to schematic diagram two；
Fig. 4 is the control that regulating valve of the present invention realizes DCS configurable controllers in the device and method that double loop automatic switchover is adjusted
Schematic diagram.
Embodiment
Label 1 is that pressure-reducing valve 1,2 is that the first two-bit triplet magnetic valve 2,3 is the second two-bit triplet magnetic valve in brief description of the drawings
3,4 be regulating valve 4.
The device of double loop automatic switchover regulation is realized to regulating valve of the present invention with reference to the accompanying drawings and detailed description
And method is described further：As illustrated, a kind of regulating valve realizes that double loop is automatically switched the device of regulation, containing controlling back
Road and regulation circuit, control loop contain the first two-bit triplet magnetic valve 2, valve positioner, converter, regulating valve 4, second liang
The entrance connection source of the gas of position-3-way solenoid valve 3, wherein the first two-bit triplet magnetic valve 2, the first of the first two-bit triplet magnetic valve 2
The entrance of connecting valve locator is exported, the second outlet of the first two-bit triplet magnetic valve 2 connects the entrance of converter, converter
The second two-bit triplet magnetic valve 3 of outlet connection first entrance, the outlet of valve positioner connects the second two-bit triplet electromagnetism
The second entrance of valve 3, the pressure signal input port of the adjusting film head of the outlet connection regulating valve 4 of the second two-bit triplet magnetic valve 3；
Regulation circuit contains DCS controllers, control signal AO1, control signal AO2, output signal DO1, output signal DO2, input letter
Number AI1, wherein input signal AI2, AO1 be adjust the control signal of valve positioner in circuit, the control letter that AO2 is converter
Number, DO1 be that the control signal of the first two-bit triplet magnetic valve 2, DO2 are the control signal of the second two-bit triplet magnetic valve 3, AI1
Detect that transmitter is input to the signal of DCS controllers for controlled variable, AI2 is the displacement of valve rod feedback that valve positioner is detected
The signal of DCS controllers is input to, during normal work, output control signal AO1 on DCS controller AO1 cards, AO1 access valves
The displacement of valve rod signal AI2 and AO1 that detect are compared by locator, valve positioner；The pick-up of controlled variable detection simultaneously
On the AI1 cards of the output signal AI1 feeding DCS controllers of device, the Setting signal of AI1 signals and controller is compared；Work as valve
Where door holder during control loop dysregulation, output control signal DO1 on DCS controller DO1 cards, it is linked into first liang
In position-3-way solenoid valve 2, output control signal DO2 on DCS controller DO2 cards, its be linked into the second two-bit triplet magnetic valve 3
In；Output control signal AO2 on DCS controller AO2 cards, it accesses in converter to control to adjust valve 4.
The first two-bit triplet magnetic valve 2, the manner of execution of the second two-bit triplet magnetic valve 3 are 1-2 when obtaining electrical excitation
Logical, gas circuit signal connects valve positioner regulating loop；2-3 leads to during dead electricity non-excitation, and gas circuit signal is connected converter and adjusted back
Road.
The converter is electropneumatic transducer or electro-control converter.
The control loop is Pneumatic control circuit or hydraulic control circuit, and the converter corresponding to it is electropneumatic transducer
Or electro-control converter.
The entrance connection source of the gas pressure-reducing valve 1 or hydraulic relief valve 1 of the first two-bit triplet magnetic valve 2.
A kind of regulating valve for the device that double loop automatic switchover regulation is realized comprising regulating valve realizes that double loop is automatically switched
The method of regulation, it is as follows that it includes the step of initial debugging and on-line debugging, initial debugging：
Step 1, open source of the gas and ensure that gas circuit signal is normal, the first two-bit triplet magnetic valve SV1, the are forced on DCS controllers
Two two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, by DCS controller manual setting valve positioner signals, to check
Whether control valve opening is corresponded to, if correspondence explanation valve positioner is working properly, valve positioner is debugged again if not corresponding to
It is allowed to correspondence；
Step 2, under conditions of valve positioner normal work is ensured, the first two-bit triplet electromagnetism is forced on DCS controllers
Valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valve dead electricity, make gas circuit signal be switched to converter control loop, pass through DCS
Controller manual setting transducer signal checks whether control valve opening corresponds to, if correspondence explanation converter is working properly, if
It is not corresponding that then debugging converter is allowed to correspondence again.
The step of on-line debugging, is as follows：
Step 1, simulation valve positioner regulating loop fault test：Valve positioner control loop is put into first, is controlled by DCS
Processing procedure sequence makes the first two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, re-test valve
The displacement of valve rod AI2 feedback signals that locator is detected；
Step 2, artificially valve positioner is broken down, allow regulating valve abnormal operation, the feeding DCS controls of AI2 feedback signals occur
One abnormal signal of device processed, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signal outputs, now
First two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatically switch to another conversion
Device regulating loop is controlled regulation to pneumatic control valve；
There is surge in step 3, the control of simulation valve positioner, stroke is not enough, linear bad, and controlled variable regulation is unstable, with
When prescribed skew is excessive, the debugging of automatic switchover regulating loop：Valve positioner control loop is put into, is made by DCS control programs
First two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, then re-test controlled variable
Control loop is put into automatic running by transmitter device AI1 input signals, DCS controllers, then gives step by DCS controllers
Disturbance makes range of disturbance exceed setting deviation, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signals
Export, now the first two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatic undisturbed
Ground is switched to another converter regulating loop and regulation is controlled to pneumatic control valve.
The given step disturbance gives step disturbance by DCS system or forced at the scene by HART475 manual operators
Set controlled variable transmitter output signal.
The present invention occurs for following several situations, and pneumatic control valve 4 still can keep correct stable operation.Specifically such as
Under, when 4 valve positioner failure of pneumatic control valve, it is main including electric signal loop occur break, short circuit, ground connection and terminal
Loosen；There is bleed pressure deficiency, airway blockage in gas signal circuit；Situations such as damage, caused pneumatic control valve 4 is abnormal
Action, such as abnormal opening, exception are closed and can not normally controlled, the displacement of valve rod signal now detected by valve positioner
Feed back on DCS controllers, after DCS controllers are by programmed algorithm inline diagnosis, automatically switch to another converter and adjust back
Road is controlled pneumatic control valve 4, it is ensured that the normal table operation of regulating system.
The control of valve positioner occur surge, stroke is not enough, it is linear bad when, cause controlled variable regulation unstable, with
Prescribed skew is excessive, and the signal being now sent to by the detection transmitter of controlled variable on DCS controllers gives with adjuster
Signal compares, and when deviation exceedes certain limit, scope can will also pass through journey by DCS system configuration and setting, DCS controllers
After sequence algorithm inline diagnosis, automatically switch to another converter regulating loop and be controlled pneumatic control valve 4, it is ensured that regulating system
Normal table operation.
Realize that, using gas circuit parallel connection, the complementary scheme of circuit is as follows：As shown in figure 4, it is the control of DCS configurable controllers
Schematic diagram, wherein AO1 are the control signal of valve positioner in regulation circuit, and AO2 is the control signal of converter, and DO1 is the
The control signal of one or two position-3-way solenoid valve 2, DO2 is the control signal of the second two-bit triplet magnetic valve 3, and AI1 is controlled variable
Detection transmitter is input to the signals of DCS controllers, and AI2 is the displacement of valve rod feed back input that detects of valve positioner to DCS
The signal of controller, MAN is that hand-operated forced two-bit triplet magnetic valve obtains electrical excitation, and SET1 is valve control signal SV and valve rod position
The setting value of shifting signal AI2 deviations, SET2 is the setting value that technique given parameters and controlled variable detect transmitter AI1 deviations.
Control program is worked out on DCS controllers, it is first determined need number of channels to distribute the AO of two 4-20mA outputs
Signal, i.e. AO1, AO2；The DO signals of two output switch parameters, i.e. DO1, DO2；Two 4-20mA input AI signals, i.e. AI1,
AI2.Be programmed configuration to DCS controllers, scattered risks and fastener redundancy principle considered during programming configuration, by AO1, AO2,
The output of DO1, DO2 passage is distributed in DCS system on two different AO, DO fasteners, to ensure one of DCS output cards
Or output channel is when breaking down, another road output can be automatically switched to, to ensure the normal operation of regulating system.
Corresponding binding post is found in DCS controller racks, corresponding letter is laid from master control room to field connection case
Number cable, is fixedly mounted two two-bit triplet magnetic valves on the valve body of pneumatic control valve 4, the first two-bit triplet magnetic valve 2SV1,
Second two-bit triplet magnetic valve 3SV2, the magnetic valve uses ASCO guide electromagnetic valves, and coil power supply voltage is 24VDC,
It is characterized in：Low in energy consumption, caloric value is small, it is allowed to long-term live line work, a converter, an electropneumatic valve positioner and corresponding
The grade annex of source of the gas pressure-reducing valve 1, by the I/O passages of DCS configurable controllers be connected to correspondingly scene equipment on.
Note inputting, exporting corresponding interface, wherein two-bit triplet magnetic valve manner of execution when magnetic valve is installed at the scene：
1-2 leads to when obtaining electrical excitation, and gas circuit signal connects valve positioner regulating loop；2-3 leads to during dead electricity non-excitation, and gas circuit signal is connected
Converter regulating loop, configuration connection source of the gas pipeline makes fixed support connection, and test each source of the gas pipeline whether there is leakage.
After above-mentioned work is completed, it is necessary to which valve positioner and electropneumatic transducer are debugged, it is ensured that the aperture of regulating valve 4 is controlled with DCS
Device processed gives aperture unanimously, and then upper to two magnetic valves SV1, SV2 electric again, just whether test action situation simultaneously check gas circuit
Often.Method of testing is as follows：Opening source of the gas ensures that gas circuit signal is normal, forces SV1, SV2 magnetic valve to obtain electric encourage on DCS controllers
Magnetic, by DCS controller manual setting valve positioner signals, to check whether the aperture of regulating valve 4 corresponds to, if correspondence explanation valve
Door holder is working properly, and debugging valve positioner is allowed to correspondence again if not corresponding to.Ensuring the normal work of valve positioner
Under conditions of work, SV1, SV2 magnetic valve dead electricity are forced in DCS system, gas circuit signal is switched to converter control loop, led to
Cross DCS controller manual setting transducer signals to check whether the aperture of regulating valve 4 corresponds to, if the work of correspondence explanation converter is just
Often, debugging converter is allowed to correspondence again if not corresponding to.
Test completes basic test more than, and the double loop automatic switchover regulation progress to regulating valve 4 is online afterwards
Debugging, adjustment method is as follows：1. electropneumatic valve positioner regulating loop fault testing method is simulated：Valve positioner is put into first
Control loop, makes SV1, SV2 magnetic valve obtain electrical excitation, the valve rod that re-test valve positioner is detected by DCS control programs
Displacement AI2 feedback signals.Specific method is：At the scene or master control room removes valve positioner signal wire (or by locator
Feedback rod is removed), artificially valve positioner is broken down in a word, allow regulating valve 4 abnormal operation occur, now AI2 feedback letters
Number feeding one abnormal signal of DCS system, after DCS controllers are by programmed algorithm inline diagnosis, automatically control two DO signals
Output, that is, control two magnetic valve dead electricity of SV1, SV2, automatically switch to another converter regulating loop and pneumatic control valve 4 is entered
Row is controlled to adjust.2. there is surge in the control of simulation valve positioner, stroke is not enough, linear bad, and controlled variable regulation is unstable,
With prescribed skew it is excessive when, automatic switchover regulating loop adjustment method：Valve positioner control loop is put into first, passes through DCS
Control program makes SV1, SV2 magnetic valve obtain electrical excitation, then re-test controlled variable transmitter device AI1 input signals, DCS systems
Control loop is put into automatic running by system, then gives step disturbance by DCS system, also can be by HART475 manual operators existing
Field strength, which is set up, determines controlled variable transmitter output signal, range of disturbance is exceeded setting deviation, and such as deviation 10%, DCS controllers lead to
Cross after programmed algorithm inline diagnosis, automatically control two DO signal outputs, that is, control two magnetic valve dead electricity of SV1, SV2, automatically
It is switched to another converter regulating loop and regulation is controlled to pneumatic control valve 4.
Related test, comes into operation after acceptance(check) more than.Effectively it can transport inline diagnosis valve positioner
Market condition, avoids causing unnecessary parking accident in valve positioner failure, while having accomplished valve positioner with turning again
The mutually standby application of the redundancy of parallel operation, successfully ensure that the safe and stable operation of regulating system.
Claims (7)
1. a kind of regulating valve realizes the device of double loop automatic switchover regulation, it is characterised in that：Contain control loop and regulation electricity
Road, control loop contains the first two-bit triplet magnetic valve, valve positioner, converter, regulating valve, the second two-bit triplet electromagnetism
The entrance connection source of the gas of valve, wherein the first two-bit triplet magnetic valve, the first outlet connecting valve of the first two-bit triplet magnetic valve
The entrance of locator, the second outlet of the first two-bit triplet magnetic valve connects the entrance of converter, the outlet connection of converter the
The first entrance of two two-bit triplet magnetic valves, the second entrance of the second two-bit triplet magnetic valve of outlet connection of valve positioner,
The pressure signal input port of the adjusting film head of the outlet connection regulating valve of second two-bit triplet magnetic valve；Regulation circuit contains DCS
Controller, control signal AO1, control signal AO2, output signal DO1, output signal DO2, input signal AI1, input signal
AI2, wherein AO1 are that to adjust the control signal of valve positioner, AO2 in circuit be that the control signal of converter, DO1 are first liang
The control signal of position-3-way solenoid valve, DO2 are that the control signal of the second two-bit triplet magnetic valve, AI1 are controlled variable detection change
Device is sent to be input to the signal of DCS controllers, AI2 is the displacement of valve rod feed back input that detects of valve positioner to DCS controllers
Signal, during normal work, output control signal AO1 on DCS controller AO1 cards, AO1 access valve positioner, valve positioning
The displacement of valve rod signal AI2 and AO1 that detect are compared by device；Controlled variable detects the output signal AI1 of transmitter simultaneously
On the AI1 cards for sending into DCS controllers, the Setting signal of AI1 signals and controller is compared；Controlled where valve positioner
When loop modulation is abnormal, output control signal DO1 on DCS controller DO1 cards, it is linked into the first two-bit triplet magnetic valve,
Output control signal DO2 on DCS controller DO2 cards, it is linked into the second two-bit triplet magnetic valve；On DCS controller AO2 cards
Output control signal AO2, it accesses in converter to control to adjust valve.
2. regulating valve according to claim 1 realizes the device of double loop automatic switchover regulation, it is characterised in that：Described
One or two position-3-way solenoid valve, the second two-bit triplet magnetic valve manner of execution are that 1-2 leads to when obtaining electrical excitation, and gas circuit signal connects valve
Door holder regulating loop；2-3 leads to during dead electricity non-excitation, and gas circuit signal connects converter regulating loop.
3. regulating valve according to claim 1 realizes the device of double loop automatic switchover regulation, it is characterised in that：Described turn
Parallel operation is electropneumatic transducer or electro-control converter.
4. regulating valve according to claim 1 realizes the device of double loop automatic switchover regulation, it is characterised in that：The control
Loop processed is Pneumatic control circuit or hydraulic control circuit, and the converter corresponding to it is electropneumatic transducer or electro-control converter.
5. regulating valve according to claim 1 realizes the device of double loop automatic switchover regulation, it is characterised in that：Described
The entrance connection source of the gas pressure-reducing valve or hydraulic relief valve of one or two position-3-way solenoid valve.
It is double that 6. a kind of regulating valve comprising described in claim 1 realizes that the regulating valve of the device of double loop automatic switchover regulation is realized
Automatically switch the method adjusted in loop, it is characterised in that：It includes initial debugging and on-line debugging,
The step of initial debugging, is as follows：
Step 1, open source of the gas and ensure that gas circuit signal is normal, the first two-bit triplet magnetic valve SV1, the are forced on DCS controllers
Two two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, by DCS controller manual setting valve positioner signals, to check
Whether control valve opening is corresponded to, if correspondence explanation valve positioner is working properly, valve positioner is debugged again if not corresponding to
It is allowed to correspondence；
Step 2, under conditions of valve positioner normal work is ensured, the first two-bit triplet electromagnetism is forced on DCS controllers
Valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valve dead electricity, make gas circuit signal be switched to converter control loop, pass through DCS
Controller manual setting transducer signal checks whether control valve opening corresponds to, if correspondence explanation converter is working properly, if
It is not corresponding that then debugging converter is allowed to correspondence again；
The step of on-line debugging, is as follows：
Step 1, simulation valve positioner regulating loop fault test：Valve positioner control loop is put into first, is controlled by DCS
Processing procedure sequence makes the first two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, re-test valve
The displacement of valve rod AI2 feedback signals that locator is detected；
Step 2, artificially valve positioner is broken down, allow regulating valve abnormal operation, the feeding DCS controls of AI2 feedback signals occur
One abnormal signal of device processed, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signal outputs, now
First two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatically switch to another conversion
Device regulating loop is controlled regulation to pneumatic control valve；
There is surge in step 3, the control of simulation valve positioner, stroke is not enough, linear bad, and controlled variable regulation is unstable, with
When prescribed skew is excessive, the debugging of automatic switchover regulating loop：Valve positioner control loop is put into, is made by DCS control programs
First two-bit triplet magnetic valve SV1, the second two-bit triplet magnetic valve SV2 magnetic valves obtain electrical excitation, then re-test controlled variable
Control loop is put into automatic running by transmitter device AI1 input signals, DCS controllers, then gives step by DCS controllers
Disturbance makes range of disturbance exceed setting deviation, after DCS controllers are by programmed algorithm inline diagnosis, automatically controls two DO signals
Export, now the first two-bit triplet magnetic valve SV1, second two magnetic valve dead electricity of two-bit triplet magnetic valve SV2, automatic undisturbed
Ground is switched to another converter regulating loop and regulation is controlled to pneumatic control valve.
7. the method that regulating valve according to claim 6 realizes double loop automatic switchover regulation, it is characterised in that：It is described to give
Determine step disturbance to give step disturbance by DCS system or force setting controlled variable to become at the scene by HART475 manual operators
Send device output signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111146475A (en) * | 2019-12-25 | 2020-05-12 | 潍柴动力股份有限公司 | Method, device and system for preventing fuel cell from being started by mistake |
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