CN105927778B - A kind of control circuit for nuclear power plant's motor-operated isolation valve - Google Patents
A kind of control circuit for nuclear power plant's motor-operated isolation valve Download PDFInfo
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- CN105927778B CN105927778B CN201610503486.XA CN201610503486A CN105927778B CN 105927778 B CN105927778 B CN 105927778B CN 201610503486 A CN201610503486 A CN 201610503486A CN 105927778 B CN105927778 B CN 105927778B
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- series arm
- relay
- isolating valve
- switch
- closed
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Safety Valves (AREA)
Abstract
A kind of control circuit for nuclear power plant's motor-operated isolation valve includes the first series arm, the second series arm and third series arm；First series arm, the second series arm and third series arm are parallel with one another；First series arm is additionally operable to conducting to connect isolating valve motor power circuit, to make isolating valve be closed for being connected to control the conducting of the second series arm；Second series arm is additionally operable to breaking so that the first series arm is breaking when isolating valve completely closes for being connected to keep the first series arm in the conduction state；Third series arm keeps the second series arm breaking for being just connected when closed in isolating valve when isolating valve completely closes.The control circuit for nuclear power plant's motor-operated isolation valve of the present invention is ingenious in design, stability and highly reliable.
Description
Technical field
The present invention relates to nuclear power field more particularly to a kind of control circuits for nuclear power plant's motor-operated isolation valve.
Background technology
Motor-operated isolation valve is widely used in nuclear power generating sets, and operation long-range or on the spot can be realized to valve.It is most
Nuclear island valve is nuclear safety related valve, wherein the electric operator of valve according to its security function be divided into for K1, K2 with
K3 grades.For requiring the isolating valve of realization sealing function, (limit switch is usual for the single control mode that generally use torque is closed
Play display, be not involved in control), i.e., valve closes in place triggering pass moment afterwards, to disconnect motor power；It closes simultaneously
Moment realizes self-sustaining (self-locking).As shown in Figure 1, Fig. 1 shows a kind of circuit diagram of the control circuit of existing isolating valve.
Its control mode is：After the pass threshold switch CLOSE triggerings of isolating valve, the coiler part electrification of the first relay 001XR, this
The normal open switch of one relay 001XR is closed；Then, the coiler part electrification of the second relay 001JA, second relay
The normal open switch of 001JA is closed.The normal open switch of second relay 001JA is closed the pass threshold switch CLOSE short circuits for making isolating valve,
To connect isolating valve motor power circuit to close isolating valve；Meanwhile second relay 001JA normal open switch closure also make
Realize self-sustaining in the pass valve circuit of isolating valve.After isolating valve is closed in place, the pass moment LF of isolating valve is disconnected, second after
The normal open switch of the coiler part dead electricity of electric appliance 001JA, the second relay 001JA disconnects, and then disconnects isolating valve motor power
Circuit.In this control mode, if there is self-locking failure (disconnect and being closed) in moment LF again, in the case where length closes valve instruction,
Isolating valve motor will frequent start-stop, cause repeat impact.The multiple startup of isolating valve motor can also accelerate electrical insulations
Aging seriously affects the reliability and availability of isolating valve motor, is impacted to the safe and stable operation of nuclear power generating sets.
Invention content
The present invention is directed to the single control mode that existing isolating valve generally use torque is closed, in this control mode,
Isolating valve motor may frequent start-stop, cause repeat impact.The multiple startup of isolating valve motor can also accelerate electrical insulations
Aging, seriously affect the reliability and availability of isolating valve motor, the safe and stable operation of nuclear power generating sets impacted
A kind of problem, it is proposed that control circuit for nuclear power plant's motor-operated isolation valve.
Technical solution proposed by the invention is as follows：
The present invention proposes a kind of control circuit for nuclear power plant's motor-operated isolation valve, including the first series arm, second
Series arm and third series arm；First series arm, the second series arm and third series arm are parallel with one another；
First series arm is additionally operable to conducting to connect isolating valve motor for being connected to control the conducting of the second series arm
Power loop, to make isolating valve be closed；
Second series arm is additionally operable to complete in isolating valve for being connected to keep the first series arm in the conduction state
Open circuit is so that the first series arm is breaking when closing；
Third series arm makes the second series connection when isolating valve completely closes for being just connected when closed in isolating valve
Branch circuit break.
In the above-mentioned control circuit of the present invention, the first series arm includes closing the coiler part of threshold switch, the first relay
And the normal open switch for being closed the second relay to connect isolating valve motor power circuit；Here, threshold switch and the are closed
The normal open switch of two relays is parallel with one another, then connects with the coiler part of the first relay；
Second series arm includes the normal open switch of the first relay, the normally closed switch of time-delay relay, for being isolated
The coiler part of the normally closed moment and the second relay that are disconnected when valve completely closes；The normal open switch of first relay,
The coiler part of the normally closed switch of time-delay relay, normally closed moment and the second relay is serially connected；
Third series arm includes the coiler part of time-delay relay and normally opened limit switch；The coil part of time-delay relay
Divide and normally opened limit switch is serially connected；Normally opened limit switch is used to be closed so that time-delay relay when isolating valve is closed
Coiler part electrification, and then the normally closed switch of time-delay relay is made to be disconnected when isolating valve completely closes.
Further include the 4th series arm in the above-mentioned control circuit of the present invention, the 4th series arm is gone here and there with first respectively
It is in parallel to join branch, the second series arm and third series arm；
4th series arm includes warning lamp, and the 4th series arm is used to be connected so that the when isolating valve completely closes
The open circuit of two series arms is additionally operable to be connected to light warning lamp when isolating valve completely closes.
In the above-mentioned control circuit of the present invention, the first series arm includes closing the coiler part of threshold switch, the first relay
And the normal open switch for being closed the second relay to connect isolating valve motor power circuit；Here, threshold switch and the are closed
The normal open switch of two relays is parallel with one another, then connects with the coiler part of the first relay；
Second series arm includes the normal open switch of the first relay, the normally closed switch of time-delay relay, third relay
Normally closed switch and the second relay coiler part；The normal open switch of first relay, the normally closed switch of time-delay relay,
The coiler part of the normally closed switch of third relay and the second relay is serially connected；
Third series arm includes the coiler part of time-delay relay and normally opened limit switch；The coil part of time-delay relay
Divide and normally opened limit switch is serially connected；Normally opened limit switch is used to be closed so that time-delay relay when isolating valve is closed
Coiler part electrification, and then the normally closed switch of time-delay relay is made to be disconnected when isolating valve completely closes；
4th series arm includes normally opened moment, warning lamp and the third for being closed when isolating valve completely closes
The coiler part of relay；The coiler part of normally opened moment, warning lamp and third relay is serially connected.
The control circuit of the present invention can be triggered by using a kind of in isolating valve closing process, and be closed completely in isolating valve
The circuit module for making isolating valve motor breaking when closing, to realize that isolating valve closes the multiple protective of valve process.The present invention's is used for
The control circuit of nuclear power plant's motor-operated isolation valve is ingenious in design, stability and highly reliable.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 shows a kind of circuit diagram of the control circuit of existing isolating valve；
Fig. 2 shows the circuit diagrams of the control circuit for nuclear power plant's motor-operated isolation valve of first embodiment of the invention；
Fig. 3 shows the circuit diagram of the control circuit for nuclear power plant's motor-operated isolation valve of second embodiment of the invention.
Specific implementation mode
The technical problem to be solved by the present invention is to：The single control mode that existing isolating valve generally use torque is closed,
In this control mode, isolating valve motor may frequent start-stop, cause repeat impact.The multiple startup of isolating valve motor is also
The aging that can accelerate electrical insulations seriously affects the reliability and availability of isolating valve motor, steady to the safety of nuclear power generating sets
Fixed operation impacts.It is proposed by the present invention solve the technical problem technical thought be：Construct a kind of can close in isolating valve
It triggers in the process, and makes the circuit module of isolating valve motor breaking when isolating valve completely closes, to realize that isolating valve closes valve
The multiple protective of process.
In order to keep the technical purpose, technical solution and technique effect of the present invention apparent, in order to art technology
Personnel understand and implement the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.
First embodiment
With reference to Fig. 2, Fig. 2 shows the electricity of the control circuit for nuclear power plant's motor-operated isolation valve of first embodiment of the invention
Lu Tu.
As shown in Fig. 2, control circuit includes the first series arm, the second series arm and third series arm；First string
It is parallel with one another to join branch, the second series arm and third series arm；
First series arm is additionally operable to conducting to connect isolating valve motor for being connected to control the conducting of the second series arm
Power loop, to make isolating valve be closed；
Second series arm is additionally operable to complete in isolating valve for being connected to keep the first series arm in the conduction state
Open circuit is so that the first series arm is breaking when closing；
Third series arm makes the second series connection when isolating valve completely closes for being just connected when closed in isolating valve
Branch circuit break.
In the above-mentioned technical solutions, it ensure that the second series arm is closed completely in isolating valve by the way that third series arm is arranged
It is breaking when closing, to prevent the second series arm frequently conducting and open circuit, and the first series arm frequently conducting and open circuit are caused,
The final reliability and availability for influencing isolating valve motor.
Specifically, in the present embodiment, the first series arm includes closing the line of threshold switch CLOSE, the first relay 001XR
Circle part and the normal open switch for being closed the second relay 001JA to connect isolating valve motor power circuit；Here, it closes
The normal open switch of threshold switch CLOSE and the second relay 001JA are parallel with one another, then the coiler part with the first relay 001XR
Series connection；
Second series arm include the normal open switch of the first relay 001XR, time-delay relay 002XR normally closed switch,
The coiler part of normally closed moment LF1 and the second relay 001JA for being disconnected when isolating valve completely closes；First
The normal open switch of relay 001XR, the normally closed switch of time-delay relay 002XR, normally closed moment LF1 and the second relay
The coiler part of 001JA is serially connected；
Third series arm includes the coiler part of time-delay relay 002XR and normally opened limit switch F/F；Time-delay relay
The coiler part of 002XR and normally opened limit switch F/F are serially connected；Normally opened limit switch F/F in isolating valve for being closed
When be closed the coiler part electrification so that time-delay relay 002XR, and then the normally closed switch of time-delay relay 002XR is made to be isolated
It is disconnected when valve completely closes.
The control process of the present embodiment specific technical solution is：After closing threshold switch CLOSE triggerings, the first relay
The coiler part of 001XR charges, to make the normal open switch of the first relay 001XR be closed, the second series arm is connected；
When the second series arm is connected, the coiler part of the second relay 001JA charges, to make the second relay
The normal open switch of 001JA is closed, to keep the first series arm in the conduction state；Meanwhile second relay 001JA it is normal
Switch is closed makes isolating valve motor power circuit connect again, to make isolating valve begin to shut off.
When isolating valve completely closes, normally closed moment LF1 can be made to disconnect, to make the line of the second relay 001JA
Part dead electricity is enclosed, and then the normal open switch of the second relay 001JA is made to disconnect, finally disconnects isolating valve motor power circuit.
Meanwhile when isolating valve close to certain position, normally opened limit switch F/F can be closed, to make third string
Join branch conducting, the coiler part electrification of time-delay relay 002XR；After some time, time-delay relay 002XR's is normally closed
Switch will disconnect, and keeps the second series arm breaking, to make the coiler part dead electricity of the second relay 001JA, finally makes second
The normal open switch of relay 001JA is always maintained at off-state.Herein, the time that normally opened limit switch F/F is closed needs to spend
Taking a large amount of time goes to determine, after so that time-delay relay 002XR is delayed, the normally closed switch of time-delay relay 002XR can be
It is disconnected when isolating valve completely closes.
In the control circuit of the present embodiment, even if there is self-locking failure conditions, isolating valve motor in normally closed moment LF1
Frequent start-stop will not occur, to improve the stability and reliability of isolating valve closing process.
Second embodiment
The electricity of the control circuit for nuclear power plant's motor-operated isolation valve of second embodiment of the invention is shown with reference to Fig. 3, Fig. 3
Lu Tu.
As shown in figure 3, control circuit includes the first series arm, the second series arm and third series arm；First string
It is parallel with one another to join branch, the second series arm and third series arm；
First series arm is additionally operable to conducting to connect isolating valve motor for being connected to control the conducting of the second series arm
Power loop, to make isolating valve be closed；
Second series arm is additionally operable to complete in isolating valve for being connected to keep the first series arm in the conduction state
Open circuit is so that the first series arm is breaking when closing；
Third series arm makes the second series connection when isolating valve completely closes for being just connected when closed in isolating valve
Branch circuit break.
In the above-mentioned technical solutions, it ensure that the second series arm is closed completely in isolating valve by the way that third series arm is arranged
It is breaking when closing, to prevent the second series arm frequently conducting and open circuit, and the first series arm frequently conducting and open circuit are caused,
The final reliability and availability for influencing isolating valve motor.
Further, in the present embodiment, control circuit further includes the 4th series arm, the 4th series arm respectively with
First series arm, the second series arm and third series arm are in parallel；
4th series arm includes warning lamp 001LA, and the 4th series arm when isolating valve completely closes for being connected
So that the second series arm is breaking, it is additionally operable to be connected to light warning lamp 001LA when isolating valve completely closes.Herein,
Four series arms can remind staff to notice that isolating valve closes completely by lighting warning lamp when isolating valve completely closes
It closes.In addition, when flashing state occurs for warning lamp, illustrates that the 4th series arm breaks down, staff is needed to place under repair.
Since the second series arm and the 4th series arm are to be arranged in parallel, when repairing four series arms, the second series arm exists
Being disconnected when isolating valve completely closes can also be realized by third series arm.
Specifically, in the present embodiment, the first series arm includes closing the line of threshold switch CLOSE, the first relay 001XR
Circle part and the normal open switch for being closed the second relay 001JA to connect isolating valve motor power circuit；Here, it closes
The normal open switch of threshold switch CLOSE and the second relay 001JA are parallel with one another, then the coiler part with the first relay 001XR
Series connection；
Second series arm include the normal open switch of the first relay 001XR, time-delay relay 002XR normally closed switch,
The coiler part of the normally closed switch of third relay 003XR and the second relay 001JA；First relay 001XR's is normally opened
Switch, the normally closed switch of time-delay relay 002XR, the normally closed switch of third relay 003XR and the second relay 001JA
Coiler part is serially connected；
Third series arm includes the coiler part of time-delay relay 002XR and normally opened limit switch F/F；Time-delay relay
The coiler part of 002XR and normally opened limit switch F/F are serially connected；Normally opened limit switch F/F in isolating valve for being closed
When be closed the coiler part electrification so that time-delay relay 002XR, and then the normally closed switch of time-delay relay 002XR is made to be isolated
It is disconnected when valve completely closes.
4th series arm includes normally opened moment LF2, the warning lamp for being closed when isolating valve completely closes
The coiler part of 001LA and third relay 003XR；Normally opened moment LF2, warning lamp 001LA and third relay 003XR
Coiler part be serially connected；
The control process of the present embodiment specific technical solution is：After closing threshold switch CLOSE triggerings, the first relay
The coiler part of 001XR charges, to make the normal open switch of the first relay 001XR be closed, the second series arm is connected；
When the second series arm is connected, the coiler part of the second relay 001JA charges, to make the second relay
The normal open switch of 001JA is closed, to keep the first series arm in the conduction state；Meanwhile second relay 001JA it is normal
Switch is closed makes isolating valve motor power circuit connect again, to make isolating valve begin to shut off.
When isolating valve completely closes, normally opened moment LF2 can be made to be closed, the conducting of the 4th series arm, warning lamp
001LA is lighted, and the electrification of the coiler part of third relay 003XR makes the normally closed switch of third relay 003XR disconnect, and makes the
The normal open switch of two relay 001JA disconnects, and finally disconnects isolating valve motor power circuit.
Meanwhile when isolating valve close to certain position, normally opened limit switch F/F can be closed, to make third string
Join branch conducting, the coiler part electrification of time-delay relay 002XR；After some time, time-delay relay 002XR's is normally closed
Switch will disconnect, and keeps the second series arm breaking, to make the coiler part dead electricity of the second relay 001JA, finally makes second
The normal open switch of relay 001JA is always maintained at off-state.Herein, the time that normally opened limit switch F/F is closed needs to spend
Taking a large amount of time goes to determine, after so that time-delay relay 002XR is delayed, the normally closed switch of time-delay relay 002XR can be
It is disconnected when isolating valve completely closes.In the present embodiment, there are following two abnormal conditions：1) when flashing state occurs for warning lamp
When, illustrate normally opened moment LF2 self-lockings failure, staff is needed to place under repair；2) after isolating valve is closed, warning lamp is not
It is bright, illustrate that normally opened moment LF2 fails to trigger, the second series arm is to be controlled to disconnect by third series arm, it is also desirable to
Staff places under repair.
In the control circuit of the present embodiment, even if there is self-locking failure conditions, isolating valve motor in normally opened moment LF2
Frequent start-stop will not occur, even if the case where failing triggering occurs in normally opened moment LF2, when isolating valve motor will not be long
Between stall, to improve the stability and reliability of isolating valve closing process.
The control circuit of the present invention can be triggered by using a kind of in isolating valve closing process, and be closed completely in isolating valve
The circuit module for making isolating valve motor breaking when closing, to realize that isolating valve closes the multiple protective of valve process.The present invention's is used for
The control circuit of nuclear power plant's motor-operated isolation valve is ingenious in design, stability and highly reliable.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (4)
1. a kind of control circuit for nuclear power plant's motor-operated isolation valve, which is characterized in that including the first series arm, the second series connection
Branch and third series arm；First series arm, the second series arm and third series arm are parallel with one another；
First series arm is additionally operable to conducting to connect isolating valve motor power for being connected to control the conducting of the second series arm
Circuit, to make isolating valve be closed；
Second series arm is additionally operable to completely close in isolating valve for being connected to keep the first series arm in the conduction state
When open circuit so that the first series arm is breaking；
Third series arm makes the second series arm when isolating valve completely closes for being just connected when closed in isolating valve
Open circuit.
2. control circuit according to claim 1, which is characterized in that the first series arm include close threshold switch, first after
The coiler part of electric appliance and normal open switch for being closed the second relay to connect isolating valve motor power circuit；This
In, the normal open switch for closing threshold switch and the second relay is parallel with one another, then connects with the coiler part of the first relay；
Second series arm includes the normal open switch of the first relay, the normally closed switch of time-delay relay, for complete in isolating valve
The coiler part of the normally closed moment and the second relay that are disconnected when contract fully；The normal open switch of first relay, delay
The coiler part of the normally closed switch of relay, normally closed moment and the second relay is serially connected；
Third series arm includes the coiler part of time-delay relay and normally opened limit switch；The coiler part of time-delay relay and
Normally opened limit switch is serially connected；Normally opened limit switch is for being closed the line so that time-delay relay when isolating valve is closed
Circle part is charged, and then the normally closed switch of time-delay relay is made to be disconnected when isolating valve completely closes.
3. control circuit according to claim 1, which is characterized in that further include the 4th series arm, the 4th series connection branch
Road is in parallel with the first series arm, the second series arm and third series arm respectively；
4th series arm includes warning lamp, and the 4th series arm is used to be connected when isolating valve completely closes so that the second string
Join branch circuit break, is additionally operable to be connected to light warning lamp when isolating valve completely closes.
4. control circuit according to claim 3, which is characterized in that the first series arm include close threshold switch, first after
The coiler part of electric appliance and normal open switch for being closed the second relay to connect isolating valve motor power circuit；This
In, the normal open switch for closing threshold switch and the second relay is parallel with one another, then connects with the coiler part of the first relay；
Second series arm include the normal open switch of the first relay, the normally closed switch of time-delay relay, third relay it is normal
Make and break is closed and the coiler part of the second relay；The normal open switch of first relay, the normally closed switch of time-delay relay, third
The coiler part of the normally closed switch of relay and the second relay is serially connected；
Third series arm includes the coiler part of time-delay relay and normally opened limit switch；The coiler part of time-delay relay and
Normally opened limit switch is serially connected；Normally opened limit switch is for being closed the line so that time-delay relay when isolating valve is closed
Circle part is charged, and then the normally closed switch of time-delay relay is made to be disconnected when isolating valve completely closes；
4th series arm includes the normally opened moment, warning lamp and third relay for being closed when isolating valve completely closes
The coiler part of device；The coiler part of normally opened moment, warning lamp and third relay is serially connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610503486.XA CN105927778B (en) | 2016-06-30 | 2016-06-30 | A kind of control circuit for nuclear power plant's motor-operated isolation valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610503486.XA CN105927778B (en) | 2016-06-30 | 2016-06-30 | A kind of control circuit for nuclear power plant's motor-operated isolation valve |
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| CN105927778A CN105927778A (en) | 2016-09-07 |
| CN105927778B true CN105927778B (en) | 2018-08-03 |
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| CN201610503486.XA Active CN105927778B (en) | 2016-06-30 | 2016-06-30 | A kind of control circuit for nuclear power plant's motor-operated isolation valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106965399A (en) * | 2017-05-22 | 2017-07-21 | 徐振勇 | Safety door mechanical protection lock before a kind of large size plastic jetting-moulding device is automatic |
| CN108363002B (en) * | 2018-02-02 | 2020-10-30 | 中广核工程有限公司 | Nuclear power station regulating valve switch action test system and method |
| CN113777976B (en) * | 2021-08-23 | 2023-01-13 | 苏州热工研究院有限公司 | Nuclear power plant isolation valve control circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2784905Y (en) * | 2004-11-18 | 2006-05-31 | 大亚湾核电运营管理有限责任公司 | Inspection and repair test device for neutron measurement selector and isolation valve for nuclear power station |
| CN202284671U (en) * | 2010-05-12 | 2012-06-27 | 洛克威尔自动控制技术股份有限公司 | System special for isolating valve and system special for isolating one or more valves |
| CN102588647A (en) * | 2012-02-15 | 2012-07-18 | 中国核动力研究设计院 | Electric control circuit and electric control method for electrically operated valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001099979A (en) * | 1999-09-29 | 2001-04-13 | Toshiba Corp | Device of calibrating nuclear instrumentation and calibration method |
| WO2003043025A1 (en) * | 2001-11-16 | 2003-05-22 | Pebble Bed Modular Reactor (Proprietary) Limited | Nuclear power plant with a gas cooled reactor |
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- 2016-06-30 CN CN201610503486.XA patent/CN105927778B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2784905Y (en) * | 2004-11-18 | 2006-05-31 | 大亚湾核电运营管理有限责任公司 | Inspection and repair test device for neutron measurement selector and isolation valve for nuclear power station |
| CN202284671U (en) * | 2010-05-12 | 2012-06-27 | 洛克威尔自动控制技术股份有限公司 | System special for isolating valve and system special for isolating one or more valves |
| CN102588647A (en) * | 2012-02-15 | 2012-07-18 | 中国核动力研究设计院 | Electric control circuit and electric control method for electrically operated valve |
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