CN110470436A - A kind of detection device and its detection method for pneumatic actuator leakproofness - Google Patents
A kind of detection device and its detection method for pneumatic actuator leakproofness Download PDFInfo
- Publication number
- CN110470436A CN110470436A CN201910772034.5A CN201910772034A CN110470436A CN 110470436 A CN110470436 A CN 110470436A CN 201910772034 A CN201910772034 A CN 201910772034A CN 110470436 A CN110470436 A CN 110470436A
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- pneumatic valve
- pneumatic
- tightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 34
- 230000008859 change Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of detection device and its detection method for pneumatic actuator leakproofness, detection device, including for air circuit, power supply unit；It is formed for air circuit by pressure generator tube line, both ends are separately connected quick coupling one, quick coupling two, quick coupling one accesses compressed air system, quick coupling two accesses pneumatic valve actuating mechanism, by quick coupling one to rapid structural two for setting gradually filtering pressure reducing valve, two-position three way magnetic valve, hand-operated valve, pressure gauge, quick coupling three on air circuit.The present invention is directed to the valve being mounted on process system and detects, and guarantees that seal tightness test real result is effective, improves the reliability of pneumatic operated valve, small in size, easy to carry and operation.
Description
Technical Field
The invention relates to a device and a method for detecting the sealing performance of a pneumatic actuating mechanism.
Background
The pneumatic valve is widely applied to a pressurized water reactor nuclear power station, and comprises a pneumatic actuating mechanism and a valve body, wherein the pneumatic actuating mechanism provides power for a valve body, and the function of cutting off or adjusting fluid is realized by controlling the action of a valve core. The power of the pneumatic actuating mechanism is derived from compressed air for a power plant instrument, the energy storage part is an air cavity for storing the compressed air, and the action of the valve core is realized by changing the pressure of the compressed air stored in the air cavity through a positioner or an electromagnetic valve and the like. Therefore, the sealing ability of the air chamber is one of the key factors for the valve to perform its designed function. At present, all pneumatic valves can execute an air tightness test after an executing mechanism is disassembled for maintenance, namely air cavity sealing performance detection. The project is that a set pressure is injected into an air cavity of the pneumatic valve through a test device, and the pressure drop condition of the air cavity is observed after air supply is cut off. The general method is to spray leakage detection liquid at the sealing position of the air cavity and judge the sealing performance of the air cavity through the quantity of generated air bubbles. However, the method has the following defects that on one hand, the sealing parts of some air cavities are positioned in the executing mechanism, and the leakage detection liquid cannot be effectively sprayed; on the other hand, whether the quality is qualified or not is judged by the quantity of generated bubbles, and different executive personnel can obtain different test conclusions.
As mentioned above, the pneumatic valves are widely used, and some pneumatic valves are used in key positions of key systems of the nuclear power plant, and the sealing performance of the air cavity cannot be reliably verified by using a leakage detection liquid spraying method, so that the valves cannot realize the design functions, and the safe and stable operation of the power plant is affected. In consideration of the serious consequences caused by the degradation of the pneumatic valve, a set of scientific and reliable air tightness detection device of the pneumatic actuating mechanism needs to be developed so as to improve the test reliability.
For example, a gas tightness detecting device disclosed in patent publication No. CN101788372A includes a detecting chamber, a control system, and a control valve, but the structure is too complex, the size is large, the carrying is inconvenient, and the valve installed on the process system cannot be tested. In addition, it lacks a filter device and the quality of the compressed air cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a device for detecting the sealing performance of an actuating mechanism of a pneumatic valve, which is used for detecting a valve arranged on a process system, ensures the real and effective sealing performance test result, improves the reliability of the pneumatic valve, and is small in size, convenient to carry and operate.
The invention is realized by the following technical scheme:
a detection device for the sealing performance of a pneumatic valve actuating mechanism comprises a gas supply loop and a power supply device; wherein,
the air supply loop is connected with the pneumatic valve actuating mechanism through a pressure generating pipeline to form a loop, and the air supply loop is used for providing rated pressure for the pneumatic valve actuating mechanism;
the gas supply loop is provided with a pressure monitoring device for monitoring gas supply pressure, and the subsequent sealing test is to observe pressure drop;
a filtering pressure reducing valve is arranged on the air supply loop and used for adjusting the pressure supplied to the pneumatic valve actuating mechanism;
the gas supply loop is also provided with one manual valve which is used as a pressure boundary when a sealing test is executed;
the gas supply loop is also provided with one two-position three-way electromagnetic valve which is used for evacuating the upstream pressure when a sealing test is executed;
preferably, the sealing test device further comprises a timing module, wherein the timing module is used for recording the pressure drop condition in the sealing test;
the power supply device supplies power to the electromagnetic valve and the timing module of the air supply loop;
preferably, the timing module comprises a start-stop button and a display screen.
Preferably, the connection joint of the air supply circuit and the pneumatic valve actuating mechanism is in the form of a quick connector.
Preferably, the pressure monitoring of the air supply loop adopts a standard pressure gauge, provides a basis for adjusting the air supply pressure, and records the pressure change condition of the pneumatic actuating mechanism.
Preferably, the timing module counts units on a second basis.
Preferably, a third quick connector is further arranged on the gas supply loop, and a high-precision pressure monitoring device can be connected to the third quick connector as a spare connector when valves with high requirements, such as a nuclear-grade pneumatic valve, are measured.
The invention also provides a pneumatic valve actuating mechanism sealing performance detection method, which is realized by using the pneumatic valve actuating mechanism sealing performance testing device, and the method comprises the following steps:
step one, installing a sealing property detection device
S11, connecting a detection device into a compressed air system;
s12, directly connecting the detection device to a pneumatic valve actuating mechanism;
s13, starting a compressed air system;
before S11, necessary measures such as personnel industrial safety protection, personnel radiation protection, equipment damage protection, system foreign matter prevention and the like are taken for the specific field environment where the pneumatic valve is located;
step two, executing tightness detection
S20, looking up a file or a drawing to confirm the rated pressure of the pneumatic valve actuating mechanism;
s21, opening the manual valve and the two-position three-way electromagnetic valve, and adjusting the air supply pressure to the rated value of the pressure of the pneumatic valve actuating mechanism through the filtering pressure reducing valve;
s22, detecting leakage of the loop by using a leakage detection liquid, and confirming no leakage;
s23, when the gas supply is stable, closing the manual valve, closing the electromagnetic valve and starting timing;
s24, observing the pressure change condition, and judging whether air is leaked; step three, dismantling the tightness checkout gear
S31, closing a compressed air system;
s32, opening a manual valve, and discharging residual pressure in the air cylinder and the pipeline;
and S33, removing the sealing detection device.
Preferably, the determination criterion is: if the pressure change is more than 1psi/min, stopping the test, and checking and processing each sealing part of the cylinder; if the pressure change is less than 1psi/min, the requirements are deemed to be met.
The invention has the beneficial technical effects that:
the detection device and the detection method provided by the invention can quickly and effectively verify the sealing performance of the pneumatic actuating mechanism, recognize the potential sealing performance degradation of the pneumatic actuating mechanism in advance, avoid the control abnormality and even the failure of the pneumatic valve and improve the reliability of the pneumatic valve. In addition, practice shows that the device can also assist in troubleshooting difficult faults of the pneumatic valve, and can realize accurate fault positioning for abnormal valve control caused by poor sealing performance of a pneumatic actuating mechanism.
Drawings
Fig. 1 is a gas circuit diagram of the tightness detection device.
In the figure: 1-quick plug head I; 2-a filter pressure reducing valve; 3-two-position three-way electromagnetic valve; 4-manual valve; 5-a pressure gauge; 6-quick coupling III; 7-quick coupling II.
Detailed Description
The structure of the device according to the invention will be described in detail below with reference to the following figures and specific embodiments:
the device for detecting the sealing performance of the pneumatic valve actuating mechanism as shown in the attached figure 1 comprises a gas supply circuit and a power supply device; the air supply loop is formed by a pressure generating pipeline, two ends of the air supply loop are respectively connected with a first quick connector 1 and a second quick connector 7, the first quick connector is connected with a compressed air system (hereinafter referred to as a compressed air system), the second quick connector is connected with a pneumatic valve actuating mechanism, and a filtering pressure reducing valve 2, a two-position three-way electromagnetic valve 3, a manual valve 4, a pressure gauge 5 and a third quick connector 6 are sequentially arranged on the air supply loop from the first quick connector to the second quick connector.
A method for detecting the sealing performance of a pneumatic valve actuating mechanism is realized by utilizing the device for testing the sealing performance of the pneumatic actuating mechanism, and comprises the following steps:
step one, installing a sealing property detection device
01. Aiming at the specific field environment where the pneumatic valve is located, necessary measures such as personnel industrial safety protection, personnel radiation protection, equipment damage protection, system foreign matter prevention and the like are taken;
02. connecting the detection device from the quick connector 1 to the air compression system through a proper pipeline joint;
03. connecting the testing device into the actuating mechanism from the quick connector 7;
04. and starting the air compression system.
Step two, executing tightness detection
01. Looking up a file or a drawing to confirm the rated pressure of the actuating mechanism;
02. opening the manual valve 4 and the two-position three-way electromagnetic valve 3, and adjusting the air supply pressure to a rated value through the filtering and reducing valve 2;
03. detecting leakage of the loop by using leakage detection liquid, and confirming no leakage;
04. when the gas supply is stable, closing the manual valve 4, closing the electromagnetic valve 3 and starting timing;
05. observing the pressure change condition of the system from the pressure gauge 5;
06. if the pressure change is more than 1psi/min, stopping the test, and checking and processing each sealing part of the cylinder; if the pressure change is less than 1psi/min, the requirements are deemed to be met.
Step three: removing the sealing detection device;
01. closing the air compression system;
02. opening the manual valve 4, and discharging residual pressure in the air cylinder and the pipeline;
03. and removing the tightness detection device.
Example 2:
the difference from the embodiment 1 is that the detection device is also provided with a timing module for timing and recording the pressure drop condition during the sealing test; the timing module comprises a start-stop button and a display screen, can be a common timer and takes seconds as a basic statistical unit.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (8)
1. The device for detecting the sealing performance of the pneumatic valve actuating mechanism is characterized by comprising an air supply loop and a power supply device; the air supply loop is formed by a pressure generation pipeline, two ends of the air supply loop are respectively connected with a compressed air system and a pneumatic valve actuating mechanism to be detected, and a filtering pressure reducing valve, a two-position three-way electromagnetic valve, a manual valve and a pressure monitoring device are sequentially arranged on the air supply loop.
2. The device for detecting the tightness of the pneumatic valve actuator according to claim 1, wherein two ends of the air supply circuit are respectively connected with the compressed air system and the pneumatic valve actuator to be detected through a first quick connector and a second quick connector.
3. The device for detecting the tightness of the pneumatic valve actuator according to claim 1 or 2, further comprising a timing module, wherein the timing module comprises a start-stop button and a display screen.
4. The pneumatic valve actuator leak tightness detection device of claim 1, wherein said timing module counts units on a second basis.
5. The device for detecting the tightness of the pneumatic valve actuator according to claim 1, wherein the pressure monitoring device uses a standard pressure gauge.
6. The device for detecting the tightness of the pneumatic valve actuator according to claim 1, wherein a third quick coupling is further provided on the air supply circuit.
7. A method for testing the tightness of a pneumatic valve actuator using the testing device of claim 1, comprising the steps of:
step one, installing a sealing property detection device
S11, connecting a detection device into a compressed air system;
s12, directly connecting the detection device to a pneumatic valve actuating mechanism;
s13, starting a compressed air system;
step two, executing tightness detection
S21, opening the manual valve and the two-position three-way electromagnetic valve, and adjusting the air supply pressure to the rated value of the pressure of the pneumatic valve actuating mechanism through the filtering pressure reducing valve;
s22, detecting leakage of the loop by using a leakage detection liquid, and confirming no leakage;
s23, when the gas supply is stable, closing the manual valve, closing the electromagnetic valve and starting timing;
s24, observing the pressure change condition, and judging whether air is leaked;
step three, dismantling the tightness checkout gear
S31, closing a compressed air system;
s32, opening a manual valve, and discharging residual pressure in the air cylinder and the pipeline;
and S33, removing the sealing detection device.
8. The detection method according to claim 7, wherein the criterion for determining whether there is a leak is: if the pressure change is more than 1psi/min, determining that the air is leaked; if the pressure change is less than 1psi/min, no air leakage is determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772034.5A CN110470436A (en) | 2019-08-21 | 2019-08-21 | A kind of detection device and its detection method for pneumatic actuator leakproofness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910772034.5A CN110470436A (en) | 2019-08-21 | 2019-08-21 | A kind of detection device and its detection method for pneumatic actuator leakproofness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110470436A true CN110470436A (en) | 2019-11-19 |
Family
ID=68513249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910772034.5A Pending CN110470436A (en) | 2019-08-21 | 2019-08-21 | A kind of detection device and its detection method for pneumatic actuator leakproofness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110470436A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157195A (en) * | 2020-03-20 | 2020-05-15 | 三门核电有限公司 | Offline leakage rate testing device for CMT outlet pneumatic isolation valve |
| CN113237611A (en) * | 2021-04-27 | 2021-08-10 | 国核工程有限公司 | Experimental isolated plant of quick isolating device under water |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227035B1 (en) * | 1999-05-06 | 2001-05-08 | Cymer, Inc. | Gas module orifice automated test fixture |
| CN101788372A (en) * | 2010-01-20 | 2010-07-28 | 台州环天机械有限公司 | Gas tightness detection device |
| CN202305154U (en) * | 2011-11-14 | 2012-07-04 | 北京冶核技术发展有限责任公司 | Leakage detection device for heat transfer tube of heat exchanger |
| CN202485881U (en) * | 2012-02-16 | 2012-10-10 | 天津天科机电检测技术有限公司 | Automatic valve pressure detection system |
| CN203606084U (en) * | 2013-12-02 | 2014-05-21 | 河南省日立信股份有限公司 | On-site fast checking system of sulfur hexafluoride gas leakage monitoring device |
| CN105258867A (en) * | 2015-09-22 | 2016-01-20 | 航天科工防御技术研究试验中心 | Gas tightness detection system |
| CN205049303U (en) * | 2015-09-10 | 2016-02-24 | 上海沃证机电技术服务有限公司 | Heat exchanger heat pipe leaks automatic checkout device |
| CN206990177U (en) * | 2017-06-28 | 2018-02-09 | 中广核核电运营有限公司 | Pneumatic operated valve mechanical performance detection means and detecting system |
| CN208736633U (en) * | 2018-09-20 | 2019-04-12 | 三门核电有限公司 | A kind of safety valve cold test system |
-
2019
- 2019-08-21 CN CN201910772034.5A patent/CN110470436A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6227035B1 (en) * | 1999-05-06 | 2001-05-08 | Cymer, Inc. | Gas module orifice automated test fixture |
| CN101788372A (en) * | 2010-01-20 | 2010-07-28 | 台州环天机械有限公司 | Gas tightness detection device |
| CN202305154U (en) * | 2011-11-14 | 2012-07-04 | 北京冶核技术发展有限责任公司 | Leakage detection device for heat transfer tube of heat exchanger |
| CN202485881U (en) * | 2012-02-16 | 2012-10-10 | 天津天科机电检测技术有限公司 | Automatic valve pressure detection system |
| CN203606084U (en) * | 2013-12-02 | 2014-05-21 | 河南省日立信股份有限公司 | On-site fast checking system of sulfur hexafluoride gas leakage monitoring device |
| CN205049303U (en) * | 2015-09-10 | 2016-02-24 | 上海沃证机电技术服务有限公司 | Heat exchanger heat pipe leaks automatic checkout device |
| CN105258867A (en) * | 2015-09-22 | 2016-01-20 | 航天科工防御技术研究试验中心 | Gas tightness detection system |
| CN206990177U (en) * | 2017-06-28 | 2018-02-09 | 中广核核电运营有限公司 | Pneumatic operated valve mechanical performance detection means and detecting system |
| CN208736633U (en) * | 2018-09-20 | 2019-04-12 | 三门核电有限公司 | A kind of safety valve cold test system |
Non-Patent Citations (1)
| Title |
|---|
| 韩秀杰 等: "一种容器气密性检测装置的设计", 《液压与气动》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157195A (en) * | 2020-03-20 | 2020-05-15 | 三门核电有限公司 | Offline leakage rate testing device for CMT outlet pneumatic isolation valve |
| CN111157195B (en) * | 2020-03-20 | 2024-06-11 | 三门核电有限公司 | Off-line leakage rate test device for CMT outlet pneumatic isolation valve |
| CN113237611A (en) * | 2021-04-27 | 2021-08-10 | 国核工程有限公司 | Experimental isolated plant of quick isolating device under water |
| CN113237611B (en) * | 2021-04-27 | 2024-05-10 | 上海核工程研究设计院股份有限公司 | Experimental isolated plant of quick isolating device under water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109752649A (en) | A kind of density monitor intelligent checking monitoring device and its tonifying Qi method of calibration | |
| CN110470436A (en) | A kind of detection device and its detection method for pneumatic actuator leakproofness | |
| CN109855814B (en) | Method and system for detecting tightness of RCPB isolation valve of nuclear power plant | |
| KR20220081031A (en) | Tightness test system and test method for valve | |
| CN104949831A (en) | Online checking device and methods for pilot valve and main valve of pilot operated safety valve | |
| KR20120088346A (en) | Apparatus of performance testing console for the Pilot Operated Check Valve | |
| KR20100045242A (en) | Sealing test device for swing check valve on reactor coolant pressure boundary | |
| CN113984304A (en) | Hydrogen energy equipment test system and test method | |
| KR102076456B1 (en) | Device for Testing Leakage of Air Compressors Intake Valve And Exhaust Valve | |
| CN112305391A (en) | Electromagnetic valve performance testing method for AP1000 main steam and main water supply isolation valve | |
| CN111256975A (en) | Device and method for checking opening time of pressure release valve | |
| CN114112216B (en) | Remote control ultrahigh-pressure gas seal testing device and testing method | |
| CN214748709U (en) | Device for checking tightness of valve seat of safety valve | |
| KR102259556B1 (en) | Test equipment for checking solenoid valve | |
| CN108869412A (en) | A kind of the combustion engine compressor blade cleaning device and method of automatic control | |
| CN204731018U (en) | Pilot valve and main valve on-line testing device in pilot operated safety valve | |
| KR102076457B1 (en) | Device for testing motor pressurized leakage for central chiller compressor | |
| CN105486472A (en) | Leak detection test apparatus for washing machine kettle assembly | |
| KR101261417B1 (en) | Apparatus for testing intermittent component and method for testing intermittent component using the same | |
| CN215217949U (en) | Device for detecting sealing performance of gas chamber of bypass exhaust valve of steam turbine of nuclear power plant | |
| CN113237611B (en) | Experimental isolated plant of quick isolating device under water | |
| CN221925542U (en) | Semiconductor device waterway tightness detection device | |
| CN219830299U (en) | Fuel valve testing device | |
| CN217059212U (en) | Nuclear power station pneumatic actuator leakproofness monitoring devices | |
| CN212963903U (en) | Generator neutral point sleeve pipe airtight test instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191119 |