CN216815865U - Performance measuring device for metal seal of pilot operated safety valve - Google Patents
Performance measuring device for metal seal of pilot operated safety valve Download PDFInfo
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- CN216815865U CN216815865U CN202122504171.6U CN202122504171U CN216815865U CN 216815865 U CN216815865 U CN 216815865U CN 202122504171 U CN202122504171 U CN 202122504171U CN 216815865 U CN216815865 U CN 216815865U
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Abstract
The utility model belongs to the technical field of nuclear power maintenance, and particularly relates to a performance measuring device for metal sealing of a pilot operated safety valve. The testing device comprises a valve body simulator, wherein the lower part of the valve body simulator is connected with a testing device; the upper portion of the valve body simulating body is connected with an exhaust valve, the top of the valve body simulating body is provided with a valve cover simulating body, and a metal sealing supporting part is arranged between the valve body simulating body and the valve cover simulating body. The utility model has the beneficial effects that: this utility model discloses a purpose is for measuring the sealed sealing performance of metal of leading formula relief valve for in the localization project implementation process, fashioned product is tested and is measured, contrasts with former factory spare parts, assesses the effect of localization spare parts.
Description
Technical Field
The utility model belongs to the technical field of nuclear power maintenance, and particularly relates to a performance measuring device for metal sealing of a pilot operated safety valve.
Background
The safety valve of the pressure stabilizer is used as a loop pressure boundary of a pressurized water reactor nuclear power plant, and plays an important role in sealing main coolant and preventing overpressure of a system, so that the sealing performance of the valve plays an important role.
For sealing performance, the sealing at the middle flange of the valve is different from other metal graphite gaskets, and metal sealing is used, as shown in fig. 1, namely, a thin metal part 21 with a C-shaped section is adopted, a spring 22 is arranged in the middle, an upper part and a lower part are respectively provided with an arc-shaped sealing surface, the metal sealing is compressed through fastening of middle flange bolts, and meanwhile, due to the fact that the temperature of a system rises, the C-shaped part expands, and effective sealing is achieved. If the metal sealing effect is poor, a loop medium is leaked, and the safety of a unit is influenced.
At present, the verification mode is that after the valve assembly is completed, a sealing test is carried out, leakage liquid is checked through a middle flange, if the sealing is unqualified, the valve needs to be disassembled again for replacement, and the overhaul work is increased.
SUMMERY OF THE UTILITY MODEL
Aiming at the pilot operated safety valve, the utility model aims to provide a device for measuring the metal sealing performance of the pilot operated safety valve, which can measure the metal sealing performance of the pilot operated safety valve and is suitable for comparing the performance of sealing elements.
The technical scheme of the utility model is as follows: a performance measuring device for metal sealing of a pilot operated safety valve comprises a valve body simulator, wherein the lower part of the valve body simulator is connected with a testing device; the upper portion of the valve body simulating body is connected with an exhaust valve, the top of the valve body simulating body is provided with a valve cover simulating body, and a metal sealing supporting part is arranged between the valve body simulating body and the valve cover simulating body.
The metal sealing support component comprises a first heat insulation plate, a separation plate, a second heat insulation plate and a guide sleeve.
The first heat insulation plate, the isolation plate, the second heat insulation plate and the guide sleeve are sequentially arranged from top to bottom.
And metal sealing is adopted among the second heat insulation plate, the guide sleeve and the valve body simulator.
The valve body simulator is used for simulating a valve cavity.
The valve body simulator is internally provided with a cavity structure.
The lower part of the valve body simulator is connected with a testing device through an inlet valve.
The testing device is a high-temperature high-pressure gas device and is used for filling a testing medium.
The middle position of the top of the valve body simulating body is provided with a valve cover simulating body.
The valve body simulation body is provided with a valve cover simulation body through bolts and nuts.
The utility model has the beneficial effects that: the purpose of this utility model is for measure the metal-enclosed sealing performance of guide's formula relief valve for in the localization project implementation process, fashioned product is tested and is measured, contrasts with former factory spare parts, assesss the effect of localization spare parts.
Drawings
FIG. 1 is a schematic view of a flange seal;
fig. 2 is a schematic structural diagram of a performance measurement device for metal sealing of a pilot operated safety valve according to the present invention.
In the figure: the testing device comprises a valve body simulator 1, a bolt nut 2, a valve cover simulator 3, a first heat insulation plate 4, a separation plate 5, a second heat insulation plate 6, a guide sleeve 7, a metal seal 8, an inlet valve 9, a testing device 10, an exhaust valve 11, a thin metal part 21C and a spring 22.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
A performance measuring device for metal sealing of a pilot operated safety valve comprises a valve body simulator 1, a bolt and a nut 2, a valve cover simulator 3, a first heat insulation plate 4, a partition plate 5, a second heat insulation plate 6, a guide sleeve 7, a metal seal 8, an inlet valve 9, a testing device 10 and an exhaust valve 11.
As shown in fig. 2, the valve body simulator 1 is used for simulating a valve cavity, a cavity structure is arranged in the valve body simulator 1, the lower part of the valve body simulator 1 is connected with a testing device 10 through an inlet valve 9, and the testing device 10 is a high-temperature high-pressure gas device and is used for filling a testing medium; the upper part of the valve body simulator 1 is connected with an exhaust valve 11 for exhausting. The middle position of the top of the valve body analog body 1 is provided with a valve cover analog body 3 through a bolt and a nut 2. A metal sealing supporting part is arranged between the valve body simulator 1 and the valve cover simulator 3, the metal sealing supporting part comprises a first heat insulation plate 4, a separation plate 5, a second heat insulation plate 6 and a guide sleeve 7 which are sequentially arranged from top to bottom, and a metal seal 8 is arranged between the second heat insulation plate 6, the guide sleeve 7 and the valve body simulator 1.
The valve cover simulation body 3 is used for simulating a valve cover, is mounted on the valve body simulation body 1 through bolts, and has the torque of 210 +/-10 Nm;
test operation mode of the utility model:
(1) measuring the gap between the flanges before and after the bolt and the nut 2 are fastened, and calculating the compression amount of metal seal to compare the compression amount of an original spare part with that of a domestic spare part;
(2) closing the exhaust valve 11, opening the inlet valve 9, filling high-temperature and high-pressure gas by using a testing device 10, gradually increasing the testing pressure and temperature to avoid over-rapid temperature rise, measuring the gap of the middle flange under each pressure and temperature platform until the site working condition is simulated, wherein the pressure is 15.5MPa, and the temperature is 286 ℃, and closing the inlet valve 9;
(3) measuring the leakage rate and observing whether the flange leaks or not;
(4) after the test is finished, opening the exhaust valve 11 to discharge the test medium;
(5) and comparing the metal sealing performance of the original factory spare parts and the domestic spare parts, judging the difference of the sealing performance of the original factory spare parts and the domestic spare parts, and determining the applicability of the domestic spare parts.
Claims (10)
1. The utility model provides a performance measurement device of guide's formula relief valve metal seal which characterized in that: the testing device comprises a valve body simulator, wherein the lower part of the valve body simulator is connected with a testing device; the upper portion of the valve body simulating body is connected with an exhaust valve, the top of the valve body simulating body is provided with a valve cover simulating body, and a metal sealing supporting part is arranged between the valve body simulating body and the valve cover simulating body.
2. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the metal sealing support component comprises a first heat insulation plate, a separation plate, a second heat insulation plate and a guide sleeve.
3. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 2, wherein: the first heat insulation plate, the isolation plate, the second heat insulation plate and the guide sleeve are sequentially arranged from top to bottom.
4. A performance measuring apparatus of a metal seal of a pilot operated safety valve according to claim 2 or 3, wherein: and metal sealing is adopted among the second heat insulation plate, the guide sleeve and the valve body simulator.
5. The apparatus for measuring the performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the valve body simulator is used for simulating a valve cavity.
6. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the valve body simulator is internally provided with a cavity structure.
7. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the lower part of the valve body simulation body is connected with a test device through an inlet valve.
8. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the testing device is a high-temperature high-pressure gas device and is used for filling a testing medium.
9. The apparatus for measuring the performance of a metal seal of a pilot operated safety valve according to claim 1, wherein: the middle position of the top of the valve body simulating body is provided with a valve cover simulating body.
10. The apparatus for measuring performance of a metal seal of a pilot operated safety valve according to claim 9, wherein: the valve body simulation body is provided with a valve cover simulation body through bolts and nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122504171.6U CN216815865U (en) | 2021-10-18 | 2021-10-18 | Performance measuring device for metal seal of pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122504171.6U CN216815865U (en) | 2021-10-18 | 2021-10-18 | Performance measuring device for metal seal of pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216815865U true CN216815865U (en) | 2022-06-24 |
Family
ID=82048287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122504171.6U Active CN216815865U (en) | 2021-10-18 | 2021-10-18 | Performance measuring device for metal seal of pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216815865U (en) |
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2021
- 2021-10-18 CN CN202122504171.6U patent/CN216815865U/en active Active
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