KR20170081812A - Motor Operated Valve Controlling apparatus and method by torque bypass circuit - Google Patents
Motor Operated Valve Controlling apparatus and method by torque bypass circuit Download PDFInfo
- Publication number
- KR20170081812A KR20170081812A KR1020160000716A KR20160000716A KR20170081812A KR 20170081812 A KR20170081812 A KR 20170081812A KR 1020160000716 A KR1020160000716 A KR 1020160000716A KR 20160000716 A KR20160000716 A KR 20160000716A KR 20170081812 A KR20170081812 A KR 20170081812A
- Authority
- KR
- South Korea
- Prior art keywords
- torque
- valve
- closing
- switch
- electric
- Prior art date
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Classifications
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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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
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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
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
- F16K31/048—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means with torque limiters
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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
- F16K35/00—Means to prevent accidental or unauthorised actuation
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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
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The present invention relates to an electric drive valve control device and a control method, and more particularly, to an electric drive valve control device and a control method for controlling the electric drive valve control device and the electric drive valve control device. The electric drive valve control device includes a motor drive circuit for controlling opening and closing of a valve, an electric drive circuit for driving the electric drive, A torque switch which is provided between an input terminal to which a control signal is inputted and which is operated when the torque measured by the torque sensor is equal to or higher than a reference value, a torque bypass switch connected in parallel with the torque switch, And a control circuit for controlling the torque bypass switch to be closed when the abnormality occurs, thereby enabling the safety function of the valve to be ensured by closing the valve reliably when an abnormality occurs or an accident occurs.
Description
The present invention relates to a method of closing a valve using a torque bypass circuit in an electric drive valve.
The electric drive valve operates the valve by supplying electric power to the motor by the remote control method by the electric signal.
During operation of the valve, if excessive force is generated due to excessive differential pressure, mechanical friction (stem bending, lack of grease), and the torque exceeds the set torque value, the torque switch operates to forcibly stop the motor drive.
On the other hand, the electric drive valve of the safety related system of the nuclear power plant shall perform the safety function in case of accident or emergency. That is, it is necessary to reliably close the valve to reliably block the fluid flowing through the valve. However, if the torque is higher than the setting value of the torque switch during the stroke of the valve due to the insufficient power of the motor due to the voltage drop, excessive differential pressure, mechanical friction, etc., the torque switch operates and the operation of the valve is stopped even if the valve is not closed completely. The safety function of the valve can not be secured and the reactor can not be stopped safely.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a control apparatus and a control method for securing a safety function of a valve by adding a torque bypass circuit to reliably close the valve at the time of occurrence of an abnormality or an accident do.
According to an aspect of the present invention, there is provided an electric motor controller for controlling opening and closing of a valve, an electric driving circuit for driving the electric actuator, a torque sensor for measuring a torque applied to the electric actuator, A torque switch provided between the electric drive circuit and an input terminal to which a control signal is inputted from the outside and operated when the torque measured by the torque sensor is equal to or higher than a reference value, a torque bypass switch connected in parallel with the torque switch, And a control circuit for controlling the torque bypass switch to close when the abnormality is detected.
According to another aspect of the present invention, the control circuit can open the torque bypass switch when the closing stroke of the valve by the electric driver advances by a reference value or more.
According to a further feature of the invention, the reference value can be at least 95% of the total closing stroke of the valve.
According to another aspect of the present invention, the electric drive valve control device may be a joucomatic actuator.
According to another aspect of the present invention, there is provided a method of controlling an electric motor, the method comprising: performing a closed drive of an electric actuator that controls opening and closing of a valve; measuring a torque applied to the electric actuator; Closing the torque bypass switch regardless of the magnitude of the measured torque and continuing the closing drive of the electric actuator through the torque bypass switch when the abnormality is detected, Control method.
According to another aspect of the present invention, there is provided a control method for a valve timing control system, comprising: determining a degree of progress of a closing stroke of a valve by an electric driver; stopping an operation of a torque bypass circuit when a progress degree exceeds a reference value; And stopping the closing drive of the electric driver.
According to a further feature of the invention, the reference value can be at least 95% of the total closing stroke of the valve.
With the above-described configurations, it is possible to ensure the safety function of the valve by reliably closing the valve at the time of occurrence of an abnormality or an accident.
1 is a block diagram showing a configuration of an electric drive valve control apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a method of controlling an electric drive valve according to an embodiment of the present invention.
3 is a circuit diagram of a conventional electric drive valve control apparatus.
4 is a circuit diagram of an electric drive valve control apparatus according to an embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a block diagram showing a configuration of an electric drive valve control apparatus according to an embodiment of the present invention.
Referring to FIG. 1, an electric drive valve control apparatus 1 (hereinafter simply referred to as a valve control apparatus) according to the present embodiment includes a
The
The
The
When the
At this time, the
The
The
The
The
The
When the torque applied to the
In the present embodiment, the switches may be arranged in the order of the
The
The
Hereinafter, the driving method of the
2 is a flowchart illustrating a method of controlling an electric drive valve according to an embodiment of the present invention.
2, when it is necessary to close the
After the start of the closing stroke of the electric actuator, the
If no abnormality is detected (No in S3), the
If the measured torque is less than the reference torque (No in S5), the process returns to S3. On the other hand, when the measured torque is equal to or higher than the reference torque (Yes in S5), the
On the other hand, if an abnormality is detected in step S3 (Yes in S3), the
The control signal from the
It is determined whether or not the closing stroke has progressed beyond the reference value (S9). If the closing stroke has not proceeded beyond the reference value (No in S9), the process returns to step S8 to continue the valve closing stroke. If it is judged that the fuel pressure has exceeded the reference value (Yes in S9), the torque bypass switch is turned off to stop the valve closing stroke (S10). That is, the operation of the
FIG. 3 is a circuit diagram of a conventional electric drive valve control apparatus, and FIG. 4 is a circuit diagram of an electric drive valve control apparatus according to an embodiment of the present invention. 3 and FIG. 4, only the parts related to the present invention will be described.
Referring to FIG. 3, a control signal for closing operation of the
3, when the torque applied to the
However, depending on the state of the
However, according to the embodiment of the present invention, as shown in FIG. 4, in addition to the conventional circuit, the control signal input to the terminal 25 is applied to the
Thus, when an abnormality occurs, the control signal can be surely transmitted to the
According to the above configuration, it is possible to provide an electric drive valve control device capable of ensuring the safety function of the valve by reliably closing the valve at the time of occurrence of an abnormality or an accident.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.
1 Electric drive
3
20
40
60
Claims (7)
An electric drive circuit for driving the electric drive unit;
A torque sensor for measuring a torque applied to the electric actuator;
A torque switch provided between the electric drive circuit and an input terminal to which a control signal is inputted from the outside and operated when the torque measured by the torque sensor is equal to or greater than a reference value;
A torque bypass switch connected in parallel with the torque switch; And
And a control circuit for detecting the occurrence of an abnormality and closing the torque bypass switch when the abnormality is detected.
Wherein the control circuit opens the torque bypass switch when a closing stroke of the valve by the electric actuator is advanced by a reference value or more.
Wherein the reference value is at least 95% of the total closing stroke of the valve.
Wherein the electric drive valve control device is a joucomatic actuator.
Measuring a torque applied to the electric actuator;
Detecting an abnormal occurrence;
Closing the torque bypass switch regardless of the measured torque when the abnormality is detected; And
And continuing the closing drive of the electric actuator through the torque bypass switch.
Determining the progress of the closing stroke of the valve by the electric actuator;
Stopping the operation of the torque bypass circuit when the progress degree has progressed beyond a reference value; And
And stopping the closing drive of the electric actuator through the torque switch.
Wherein the reference value is 95% or more of the total closing stroke of the valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160000716A KR101794433B1 (en) | 2016-01-05 | 2016-01-05 | Motor Operated Valve Controlling apparatus and method by torque bypass circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160000716A KR101794433B1 (en) | 2016-01-05 | 2016-01-05 | Motor Operated Valve Controlling apparatus and method by torque bypass circuit |
Publications (2)
Publication Number | Publication Date |
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KR20170081812A true KR20170081812A (en) | 2017-07-13 |
KR101794433B1 KR101794433B1 (en) | 2017-12-01 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020160000716A KR101794433B1 (en) | 2016-01-05 | 2016-01-05 | Motor Operated Valve Controlling apparatus and method by torque bypass circuit |
Country Status (1)
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KR (1) | KR101794433B1 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004062537A (en) * | 2002-07-29 | 2004-02-26 | Japan Atom Power Co Ltd:The | Remote diagnosis system for motor-operated valve |
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2016
- 2016-01-05 KR KR1020160000716A patent/KR101794433B1/en active IP Right Grant
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KR101794433B1 (en) | 2017-12-01 |
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