CN116007861A - Pilot-operated type safety valve piston sealing performance measuring device - Google Patents
Pilot-operated type safety valve piston sealing performance measuring device Download PDFInfo
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- CN116007861A CN116007861A CN202111234050.2A CN202111234050A CN116007861A CN 116007861 A CN116007861 A CN 116007861A CN 202111234050 A CN202111234050 A CN 202111234050A CN 116007861 A CN116007861 A CN 116007861A
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- sealing performance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention belongs to the field of nuclear power overhaul, and particularly relates to a pilot-operated safety valve piston sealing performance measuring device. The valve body simulator comprises a valve body simulator body, wherein the valve body simulator body simulates a valve chamber, a piston support column is arranged in the valve body simulator body, and the lower part of the valve body simulator body is connected with a water filling device; the valve body simulator is provided with a valve head, a piston and a seal are arranged in the valve head, the piston and the seal are connected with a piston supporting column, the top of the valve head is provided with a joint and a seal, one side of the top of the valve head is connected with a valve head exhaust valve, and the joint and the seal are connected with a test bed; the upper part of the valve body simulation body is connected with an exhaust pipeline for exhausting and collecting leakage. The invention has the beneficial effects that: the leakage quantity of the valve head piston seal of the pilot-operated safety valve can be effectively measured, and the leakage quantity is used for judging the sealing performance of the valve head piston. The method can also be used for carrying out test measurement on the molded product, comparing with original spare parts in factories and evaluating the effects of the spare parts.
Description
Technical Field
The invention belongs to the field of nuclear power overhaul, and particularly relates to a pilot-operated safety valve piston sealing performance measuring device.
Background
The pressure stabilizer safety valve is used as a primary loop pressure boundary of the pressurized water reactor nuclear power plant, has an important function for sealing main coolant and preventing the system from being overpressured, so that the normal opening and closing of the valve according to the pressure fixed value has a critical function for the pressure maintenance of the primary loop.
The system pressure is transmitted to the valve head chamber of the valve body through the relation and is used for closing the valve, and meanwhile effective sealing is provided, so that the piston of the valve head chamber is sealed to be a pressure boundary, and meanwhile the sealing performance of the valve is guaranteed. If the sealing effect of the piston is poor, the leakage of the piston seal is caused, and meanwhile, the sealing lining of the valve body is insufficient, so that a loop medium is leaked, and the safety of a unit is influenced.
The mode of verification at present is that after the valve equipment is accomplished, carry out the leakproofness test, judge the leakproofness through observing the leak source, can't audio-visual judgement, when changing the piston seal simultaneously, need the disassembly valve upper portion again, increased the maintenance work.
Disclosure of Invention
Aiming at the problem that the sealing performance of the valve head piston sealing cannot be judged by the pilot type safety valve, the invention aims to provide the pilot type safety valve piston sealing performance measuring device which can measure the leakage rate of the valve head piston sealing of the pilot type safety valve, determine the sealing performance of the piston and is also used for performance comparison of sealing elements.
The technical scheme of the invention is as follows: the pilot type safety valve piston sealing performance measuring device comprises a valve body simulator, wherein the valve body simulator simulates a valve cavity, a piston support column is arranged in the valve body simulator, and the lower part of the valve body simulator is connected with a water filling device; the valve body simulator is provided with a valve head, a piston and a seal are arranged in the valve head, the piston and the seal are connected with a piston supporting column, the top of the valve head is provided with a joint and a seal, one side of the top of the valve head is connected with a valve head exhaust valve, and the joint and the seal are connected with a test bed; the upper part of the valve body simulation body is connected with an exhaust pipeline for exhausting and collecting leakage.
The valve body simulates a built-in groove.
The groove is used for directly placing the piston support column.
The lower part of the valve body simulation body is connected with a water filling device through a water filling and draining valve.
The valve body simulator is provided with a convex flange surface.
The valve head is arranged on the convex flange surface through bolts and nuts.
A sealing gasket is arranged between the valve head and the convex flange surface of the valve body simulator.
The valve head is internally provided with a piston and a seal by using bolts.
The joint and the seal are connected with the test bed through a valve head connecting pipeline.
The exhaust pipeline comprises a leakage collecting pipe, an exhaust valve and a connecting hose, wherein the exhaust valve is connected with the leakage collecting pipe through the connecting hose and is connected with the upper part of the valve body simulation body through the pipeline.
The invention has the beneficial effects that: the leakage quantity of the valve head piston seal of the pilot-operated safety valve can be effectively measured, and the leakage quantity is used for judging the sealing performance of the valve head piston. The method can also be used for carrying out test measurement on the molded product, comparing with original spare parts in factories and evaluating the effects of the spare parts.
Drawings
Fig. 1 is a schematic structural diagram of a pilot-operated safety valve piston sealing performance measuring device provided by the invention.
In the figure: the device comprises a leakage collecting pipe 1, a valve body simulation body 2, a bolt nut 3, a gasket 4, a valve head exhaust valve 5, a connecting bolt 6, a joint 7 and a seal 8, a piston and a seal 9, a valve head 10, a valve head connecting pipeline 11, a test bench 12, a water filling device 13, a water filling and draining valve 14, a piston supporting column 15, an exhaust valve 16 and a connecting hose.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
A pilot type safety valve piston sealing performance measuring device comprises a leakage collecting pipe 1, a valve body simulation body 2, a bolt nut 3, a gasket 4, a valve head exhaust valve 5, a connecting bolt 6, a joint and seal 7, a piston and seal 8, a valve head 9, a valve head connecting pipeline 10, a test bench 11, a water filling device 12, a water filling and draining valve 13, a piston supporting column 14, an exhaust valve 15 and a connecting hose 16.
As shown in fig. 1, the valve body simulator 2 simulates a valve chamber, a built-in groove is used for directly placing a piston support column 14, and the lower part is connected with a water filling device 12 through a water filling and draining valve 13 and is used for simulating water filling and water draining in the body; the valve body simulation body 2 is provided with a convex flange surface, the valve head 9 is arranged on the convex flange surface through the bolt and the nut 3, and a sealing gasket 4 is arranged between the valve head 9 and the convex flange surface of the valve body simulation body 2; the inside of the valve head 9 is provided with a piston and a seal 8 by using 8 bolts, the piston and the seal 8 are connected with a piston supporting column 14, the middle of the top of the valve head 9 is connected with a joint and a seal 7 by a connecting bolt 6, one side of the top of the valve head 9 is connected with a valve head exhaust valve 5, and the joint and the seal 7 are connected with a test bed 11 by a valve head connecting pipeline 10; the upper part of the valve body simulation body 2 is connected with an exhaust pipeline for exhausting and collecting leakage, the exhaust pipeline comprises a leakage collecting pipe 1, an exhaust valve 15 and a connecting hose 16, the exhaust valve 15 is connected with the leakage collecting pipe 1 through the connecting hose 16, and the exhaust valve 15 is connected with the upper part of the valve body simulation body 2 through the pipeline. The exhaust valve 15 is used to evacuate the chamber of the valve body simulator 2.
The test operation mode of the invention is as follows:
(1) Placing the piston support column 14 in the groove of the valve head simulator 2;
(2) The piston and the seal 8 are installed in the valve head 9, the position is adjusted, the whole valve head device is installed on the valve body simulation body 2, the sealing gasket 4 is installed between the flanges, and the moment 200NM is fastened;
(3) The joint and the seal 7 are fixed on the valve head 9 through the connecting bolt 6 and are connected with the test bed 11 through the valve head connecting pipeline 10 in a quick joint connection mode;
(4) Opening the valve head exhaust valve 5, filling water into the valve head chamber by using the connection of the test bench 11 until the valve head exhaust valve 5 has continuous water flow, closing the valve head exhaust valve 5, boosting the pressure to 30bar by using the test bench 11, and closing the test bench 11;
(5) Opening the exhaust valve 15 and the water filling and discharging valve 13, filling water into the valve body simulation body 2 by using the water filling device 12 until continuous water flows out of the exhaust valve 15, and closing the exhaust valve 15;
(6) After the exhaust valve 15, a connecting hose 16 is used for connecting the leakage collecting pipe 1, the exhaust valve 15 is opened to enable the leakage collecting pipe 1 to be full of water, then the water filling and discharging valve 13 is closed, and the water filling device 12 is disassembled;
(7) Pouring out part of the leakage collecting pipe 1, adjusting the position to the middle measuring range, installing the leakage collecting pipe 1 on a valve body simulation, bonding by using an adhesive tape, and recording the liquid level value L1 of the leakage collecting pipe 1;
(8) The valve head chamber was pressurized to 250bar using test bench 11;
(9) Checking that the joint and the seal 7 and the valve head exhaust valve 5 are not leaked;
(10) Observing for 30 minutes, and recording the liquid level value L2 of the leakage collecting pipe 1;
(11) Calculating the leakage amount: L2-L1. Judging whether the sealing performance of the piston is qualified according to the standard;
(12) And comparing leakage rates of the original plant spare parts and the domestic spare parts, judging the sealing performance difference between the original plant spare parts and the domestic development spare parts, and determining the applicability of the domestic development spare parts.
Claims (10)
1. A pilot operated relief valve piston sealing performance measuring device which characterized in that: the valve body simulator comprises a valve body simulator body, wherein the valve body simulator body simulates a valve chamber, a piston support column is arranged in the valve body simulator body, and the lower part of the valve body simulator body is connected with a water filling device; the valve body simulator is provided with a valve head, a piston and a seal are arranged in the valve head, the piston and the seal are connected with a piston supporting column, the top of the valve head is provided with a joint and a seal, one side of the top of the valve head is connected with a valve head exhaust valve, and the joint and the seal are connected with a test bed; the upper part of the valve body simulation body is connected with an exhaust pipeline for exhausting and collecting leakage.
2. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the valve body simulates a built-in groove.
3. The pilot operated safety valve piston sealing performance measurement apparatus according to claim 2, wherein: the groove is used for directly placing the piston support column.
4. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the lower part of the valve body simulation body is connected with a water filling device through a water filling and draining valve.
5. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the valve body simulator is provided with a convex flange surface.
6. The pilot operated safety valve piston sealing performance measurement apparatus according to claim 5, wherein: the valve head is arranged on the convex flange surface through bolts and nuts.
7. The pilot operated safety valve piston sealing performance measurement apparatus as set forth in claim 6, wherein: a sealing gasket is arranged between the valve head and the convex flange surface of the valve body simulator.
8. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the valve head is internally provided with a piston and a seal by using bolts.
9. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the joint and the seal are connected with the test bed through a valve head connecting pipeline.
10. The pilot operated safety valve piston sealing performance measurement apparatus of claim 1, wherein: the exhaust pipeline comprises a leakage collecting pipe, an exhaust valve and a connecting hose, wherein the exhaust valve is connected with the leakage collecting pipe through the connecting hose and is connected with the upper part of the valve body simulation body through the pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234050.2A CN116007861A (en) | 2021-10-22 | 2021-10-22 | Pilot-operated type safety valve piston sealing performance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234050.2A CN116007861A (en) | 2021-10-22 | 2021-10-22 | Pilot-operated type safety valve piston sealing performance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116007861A true CN116007861A (en) | 2023-04-25 |
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ID=86017888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111234050.2A Pending CN116007861A (en) | 2021-10-22 | 2021-10-22 | Pilot-operated type safety valve piston sealing performance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116007861A (en) |
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2021
- 2021-10-22 CN CN202111234050.2A patent/CN116007861A/en active Pending
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