CN210603885U - Nuclear-grade pneumatic control valve performance detection device - Google Patents
Nuclear-grade pneumatic control valve performance detection device Download PDFInfo
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- CN210603885U CN210603885U CN201921464881.7U CN201921464881U CN210603885U CN 210603885 U CN210603885 U CN 210603885U CN 201921464881 U CN201921464881 U CN 201921464881U CN 210603885 U CN210603885 U CN 210603885U
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Abstract
The utility model provides a nuclear level pneumatic control valve performance detection device, including compressed air source, signal generator, a pressure transmitter, No. two pressure transmitters, No. three pressure transmitters, displacement sensor and record appearance, surveyed nuclear level pneumatic control valve and include valve rod, electrical converter, locator and pneumatic control valve cylinder. The compressed air source is respectively connected with the power air source input end of the electric converter and the power air source input end of the positioner through air circuits. The signal generator is electrically connected with the signal receiving end of the electric converter, the output air pressure end of the electric converter is connected with the air path of the air pressure signal input end of the positioner, and the output air pressure end of the positioner is connected with the air path of the air cylinder of the pneumatic regulating valve. The utility model discloses can improve the maintenance quality, reduce the fault rate, make valve overall control more accurate, actuating mechanism moves more smoothly.
Description
Technical Field
The utility model belongs to the technical field of pneumatic control valve maintenance, concretely relates to nuclear level pneumatic control valve performance detection device.
Background
In the operation of a nuclear power station, a pneumatic regulating valve is used as an important part of nuclear power automation control equipment, relates to each system of a power station and is widely used. The pneumatic control valve has the hard requirements of accurate positioning, sensitive control and stable operation, and has the characteristics of complex logic, wide abnormal spread, no maintenance condition in most daily life and the like, and whether the system or even the whole unit state is directly influenced by the normal and stable operation of the pneumatic control valve is determined.
Since the three-mile island accident, nuclear power institutions of various countries actively research and develop valve performance detection equipment, and the attention degree on the valve performance is increasingly improved. At present, the performance detection equipment of the domestic nuclear power valve completely depends on imported equipment, the average price of each unit is more than 200 ten thousand, the price is high, the technology is closed, and the equipment overhauling and maintaining capacity is not realized. The performance test work of the valves of the domestic nuclear power plants mostly adopts an external entrustment mode, the external dependence is large, and the autonomous maintenance capability is low.
Because pneumatic control valve structure is more complicated, the work of examining and repairing exists the difference of dividing the worker at present. The actuating mechanism is in charge of machinery, and the control part is in charge of instrument control, forms knowledge blank easily like this, probably causes the wholeness ability not good, has potential hidden danger, and is too high to maintenance personal skill requirement, and the probability that the mistake appears increases, influences maintenance quality and follow-up unit steady operation.
Therefore, there is a need to design an improved detection device to solve the above problems in the prior art.
Disclosure of Invention
The utility model aims at providing a nuclear level pneumatic control valve performance detection device realizes that valve overall control is more accurate, and actuating mechanism moves more smoothly.
The utility model adopts the technical proposal that:
the utility model provides a nuclear level pneumatic control valve performance detection device, includes compressed air source, signal generator, a pressure transmitter, No. two pressure transmitters, No. three pressure transmitter and record appearance, and the nuclear level pneumatic control valve that is surveyed includes valve rod, electrical converter, locator and pneumatic control valve cylinder.
The electrical converter has three ports: the device comprises a power air source input end, a signal receiving end and an output air pressure end.
The positioner has three ports: the pneumatic control system comprises a power air source input end, an air pressure signal input end and an output air pressure end.
The compressed air source is respectively connected with the power air source input end of the electric converter and the power air source input end of the positioner through air circuits, and compressed air required by work is provided for the electric converter and the positioner.
The signal generator is electrically connected with the signal receiving end of the electric converter, the output air pressure end of the electric converter is connected with the air path of the air pressure signal input end of the positioner, and the output air pressure end of the positioner is connected with the air path of the air cylinder of the pneumatic regulating valve.
The opening degree signal of the 4-20 mA analog valve generated by the signal generator is sent to a signal receiving end of the electrical converter, the opening degree signal is converted into an air pressure signal of 20-100 kPa through the electrical converter, the air pressure signal is sent to the positioner, and the positioner outputs air pressure to be connected to the air cylinder of the pneumatic regulating valve.
The first pressure transmitter is connected to the output air pressure end of the electric converter through an air circuit and used for measuring the output air pressure of the electric converter. The second pressure transmitter is connected to the output air pressure end of the positioner through an air circuit and used for measuring the output air pressure of the positioner. The third pressure transmitter is connected to the power gas source input end of the positioner through a gas circuit and used for measuring the gas supply pressure of the positioner.
The recorder is respectively and directly and electrically connected with the signal generator, the first pressure transmitter, the second pressure transmitter and the third pressure transmitter.
The nuclear-grade pneumatic regulating valve performance detection device is further provided with a displacement sensor.
The displacement sensor is arranged on a valve rod of the nuclear-grade pneumatic regulating valve and used for measuring the displacement of the valve rod. The displacement sensor is directly and electrically connected with the recorder.
The recorder simultaneously records five electrical signals: the device comprises a signal generator, a simulation valve opening signal, a pressure measurement value of a first pressure transmitter, a pressure measurement value of a second pressure transmitter, a pressure measurement value of a third pressure transmitter and a measurement value of a displacement sensor.
The utility model discloses the beneficial effect who gains does:
1. key parameters such as response speed and stability of the valve, change trend of input and output air pressure of the positioner and the like can be timely and accurately obtained;
2. the maintenance quality is improved, the failure rate is reduced, the overall control of the valve is more accurate, and the action of an actuating mechanism is smoother;
3. the root cause of the problem can be fully and visually detected, and maintenance personnel can conveniently and fundamentally solve the problem.
Drawings
Fig. 1 is a schematic structural diagram of a nuclear-grade pneumatic control valve performance detection device.
Wherein: 1 is a signal generator; 2 is an electrical converter; 3 is a first pressure transmitter; 4 is a third pressure transmitter; 5 is a second pressure transmitter; 6 is a displacement sensor; 7 is a recorder; 8 is a positioner; and 9 is a compressed air source.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model provides a nuclear level pneumatic control valve performance detection device, including compressed air source 9, signal generator 1, pressure transmitter 3, No. two pressure transmitter 5, No. three pressure transmitter 4 and record appearance 7, surveyed nuclear level pneumatic control valve and include valve rod, electrical converter 2, locator 8 and pneumatic control valve cylinder.
The electrical converter 2 has three ports: the device comprises a power air source input end, a signal receiving end and an output air pressure end.
The positioner 8 has three ports: the pneumatic control system comprises a power air source input end, an air pressure signal input end and an output air pressure end.
The compressed air source 9 is respectively connected with the power air source input end of the electric converter 2 and the power air source input end of the positioner 8 through air paths, and provides compressed air required by work for the electric converter.
The signal generator 1 is electrically connected with a signal receiving end of the electric converter 2, an output air pressure end of the electric converter 2 is connected with an air pressure signal input end of the positioner 8 through an air circuit, and an output air pressure end of the positioner 8 is connected with an air circuit of an air cylinder of the pneumatic regulating valve.
The 4-20 mA analog valve opening signal generated by the signal generator 1 is sent to a signal receiving end of the electrical converter 2, and is converted into an air pressure signal of 20-100 kPa through the electrical converter 2, the air pressure signal is sent to the positioner 8, and the positioner 8 outputs air pressure to be connected to the air cylinder of the pneumatic regulating valve.
The first pressure transmitter 3 is connected to the output air pressure end of the electrical converter 2 through an air circuit and used for measuring the output air pressure of the electrical converter 2. The second pressure transmitter 5 is connected to the output air pressure end of the positioner 8 through an air channel and used for measuring the output air pressure of the positioner 8. The third pressure transmitter 4 is connected to the power gas source input end of the positioner 8 through a gas circuit and is used for measuring the gas supply pressure of the positioner 8.
The recorder 7 is respectively and directly and electrically connected with the signal generator 1, the first pressure transmitter 3, the second pressure transmitter 5 and the third pressure transmitter 4.
The nuclear-grade pneumatic regulating valve performance detection device is further provided with a displacement sensor 6.
And the displacement sensor 6 is arranged on a valve rod of the nuclear-grade pneumatic regulating valve and used for measuring the displacement of the valve rod. The displacement sensor 6 is electrically connected directly to the recorder 7.
The recorder 7 simultaneously records five electrical signals: the simulation valve opening degree signal of signal generator 1, the pressure measurement value of pressure transmitter 3, the pressure measurement value of pressure transmitter 5, the pressure measurement value of pressure transmitter 4, the measurement value of displacement sensor 6.
When the device is used, after the nuclear-grade pneumatic regulating valve performance detection device is connected, the following valve characteristic detection contents are executed:
1. parameters of the valve actuating mechanism, such as the size of a diaphragm of the pneumatic head, the stroke of the valve, the maximum pressure bearing of the diaphragm head, BENCH SET and the like, are recorded and input into a corresponding program of a recorder.
2. And respectively operating the valve by using a linear signal and a trapezoidal signal, judging whether the valve is qualified or not by combining a feedback waveform and a data statistical result, and if so, re-detecting after maintenance.
The utility model discloses the beneficial effect who gains does:
1. key parameters such as response speed and stability of the valve, change trend of input and output air pressure of the positioner and the like can be timely and accurately obtained;
2. the maintenance quality is improved, the failure rate is reduced, the overall control of the valve is more accurate, and the action of an actuating mechanism is smoother;
3. the root cause of the problem can be fully and visually detected, and maintenance personnel can conveniently and fundamentally solve the problem.
Claims (5)
1. The utility model provides a nuclear level pneumatic control valve performance detection device which characterized in that: the device comprises a compressed air source (9), a signal generator (1), a first pressure transmitter (3), a second pressure transmitter (5), a third pressure transmitter (4) and a recorder (7), wherein a nuclear-grade pneumatic regulating valve to be measured comprises a valve rod, an electric converter (2), a positioner (8) and a pneumatic regulating valve cylinder; the electrical converter (2) has three ports: the device comprises a power air source input end, a signal receiving end and an output air pressure end; the positioner (8) has three ports: the device comprises a power air source input end, an air pressure signal input end and an output air pressure end; the compressed air source (9) is respectively connected with the power air source input end of the electric converter (2) and the power air source input end of the positioner (8) through air circuits; the signal generator (1) is electrically connected with a signal receiving end of the electric converter (2); the output air pressure end of the electric converter (2) is connected with the air pressure signal input end of the positioner (8) through an air circuit; the output air pressure end of the positioner (8) is connected with the air passage of the air cylinder of the pneumatic regulating valve; the gas circuit of the first pressure transmitter (3) is connected to the output gas pressure end of the electric converter (2); the gas circuit of the second pressure transmitter (5) is connected to the output gas pressure end of the positioner (8); the air passage of the third pressure transmitter (4) is connected to the input end of a power air source of the positioner (8); the recorder (7) is respectively and directly electrically connected with the signal generator (1), the first pressure transmitter (3), the second pressure transmitter (5) and the third pressure transmitter (4).
2. The nuclear-grade pneumatic regulator valve performance detection device of claim 1, wherein: the nuclear-grade pneumatic regulating valve performance detection device is further provided with a displacement sensor (6), and the displacement sensor (6) is installed on a valve rod of the nuclear-grade pneumatic regulating valve.
3. The nuclear-grade pneumatic regulator valve performance detection device of claim 2, wherein: the displacement sensor (6) is directly and electrically connected with the recorder (7).
4. The nuclear-grade pneumatic regulator valve performance detection device of claim 1, wherein: the signal generator (1) generates an analog valve opening signal of 4-20 mA, and sends the analog valve opening signal to a signal receiving end of the electric converter (2).
5. The nuclear-grade pneumatic regulator valve performance detection device of claim 4, wherein: the electric converter (2) converts the received 4-20 mA analog valve opening signal into a 20-100 kPa air pressure signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464881.7U CN210603885U (en) | 2019-09-05 | 2019-09-05 | Nuclear-grade pneumatic control valve performance detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921464881.7U CN210603885U (en) | 2019-09-05 | 2019-09-05 | Nuclear-grade pneumatic control valve performance detection device |
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| CN210603885U true CN210603885U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358345A (en) * | 2021-04-30 | 2021-09-07 | 广东韶钢工程技术有限公司 | Method for checking and solving faults of pneumatic regulating valve |
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2019
- 2019-09-05 CN CN201921464881.7U patent/CN210603885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358345A (en) * | 2021-04-30 | 2021-09-07 | 广东韶钢工程技术有限公司 | Method for checking and solving faults of pneumatic regulating valve |
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