CN216078546U - Sealing device for end cover leakage of valve shaft of valve of nuclear power plant - Google Patents
Sealing device for end cover leakage of valve shaft of valve of nuclear power plant Download PDFInfo
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- CN216078546U CN216078546U CN202121702388.1U CN202121702388U CN216078546U CN 216078546 U CN216078546 U CN 216078546U CN 202121702388 U CN202121702388 U CN 202121702388U CN 216078546 U CN216078546 U CN 216078546U
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- valve shaft
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- shaft end
- valve
- nuclear power
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Abstract
The utility model relates to the technical field of nuclear power maintenance, and particularly discloses a nuclear power maintenance technology, wherein a temporary sealing cover is of an internal thread sleeve structure and is matched with an external thread of a connecting bolt; installing a sealing gasket at the bottom opening end of the temporary sealing cover; the connecting bolt is arranged on the end cover of the valve shaft; the connecting bolt is screwed tightly with the temporary sealing cover in a matched threaded manner, so that the temporary sealing cover is connected with and fixed to the valve shaft end cover. The device has simple structure and convenient use, and can temporarily eliminate the valve with leakage defect on the valve shaft end cover of the valve on the premise of not stopping the equipment.
Description
Technical Field
The utility model belongs to the technical field of nuclear power maintenance, and particularly relates to a leakage sealing device for an end cover of a valve shaft of a valve in a nuclear power plant.
Background
The valve shaft end cover sealing structure is adopted for the valves of the butterfly valves and the pneumatic check valves used in the production system of the nuclear power plant, the valve shaft end cover sealing structure can lose effectiveness gradually in the long-term operation process of the unit, system media can leak from the valve shaft end cover sealing position to the environment, the defect is usually treated by adopting a mode of fastening a valve shaft end cover bolt on line, once the defect cannot be eliminated through on-line fastening, the defect equipment needs to be isolated and stopped, and the valve shaft end cover sealing part needs to be replaced again. Because some equipment cannot be isolated and shut down during the operation of the unit, if the defects are kept continuously, the normal operation of the unit is possibly threatened.
Therefore, it is necessary to conceive of eliminating the leak defect without stopping the apparatus.
Disclosure of Invention
The utility model aims to provide a leakage sealing device for a valve shaft end cover of a valve in a nuclear power plant, which can temporarily eliminate the leakage defect on the premise of not stopping equipment by installing a layer of sealing cover outside the valve shaft end cover.
The technical scheme of the utility model is as follows:
a nuclear power plant valve shaft end cover leakage sealing device comprises a temporary sealing cover, a sealing gasket and a connecting bolt;
the temporary sealing cover is of an internal thread sleeve structure and is matched with the external thread of the connecting bolt;
installing a sealing gasket at the bottom opening end of the temporary sealing cover;
the connecting bolt is arranged on the end cover of the valve shaft;
the connecting bolt is screwed tightly with the temporary sealing cover in a matched threaded manner, so that the temporary sealing cover is connected with and fixed to the valve shaft end cover.
And an annular groove is processed at the bottom opening end of the temporary sealing cover and used for installing and fixing a sealing gasket.
When the sealing gasket is arranged at the annular groove at the bottom of the temporary sealing cover, the sealing gasket is confirmed to be kept not to fall off.
And a nut-shaped fastening head is processed at the top sealing end of the temporary sealing cover.
When the temporary sealing cover and the connecting bolt are screwed to be in contact with the end cover of the valve shaft of the valve, the fastening head at the top of the temporary sealing cover is screwed continuously by using a spanner, so that the sealing gasket is compressed.
The connecting bolt is welded and fixed with the end cover of the valve shaft of the valve.
When the connecting bolt is screwed with the temporary sealing cover in a matched threaded manner, the sealing gasket is compressed and arranged between the temporary sealing cover and the valve shaft end cover of the valve, so that reliable sealing is realized.
The utility model has the beneficial effects that:
the temporary sealing device is used for temporary sealing of valve shaft end covers of valves with valve shaft end cover sealing structures in a nuclear power plant field part, such as butterfly valves, pneumatic check valves and the like, has the advantages of simple structure and convenience in use, can temporarily eliminate valves with leakage defects on the valve shaft end covers of the valves on the premise of not stopping equipment, can timely eliminate factors influencing the safe operation of a unit, and has certain economic benefit because the processing mode does not need to change the state of the unit.
Drawings
FIG. 1 is a schematic view of a valve shaft end cap leakage seal arrangement;
FIG. 2 is a schematic view of the connection of the connecting bolt to the valve shaft end cap of the valve;
fig. 3 is a schematic view of the valve end cap leakage sealing device and the valve shaft end cap after installation.
In the figure: 1. a temporary seal cover; 2. sealing gaskets; 3. a connecting bolt; 4. valve shaft end cover.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
The nuclear power plant valve shaft end cover leakage sealing device shown in fig. 1 comprises a temporary sealing cover 1, a sealing gasket 2 and a connecting bolt 3.
The temporary sealing cover 1 is of an internal thread sleeve structure and is matched with the external thread of the connecting bolt 3.
The top sealing end of the temporary sealing cover 1 is provided with a fastening head in a nut shape, so that a spanner can be conveniently used for fastening.
An annular groove is processed at the bottom opening end of the temporary sealing cover 1 and used for installing and fixing the sealing gasket 2. When the sealing gasket 2 is arranged at the bottom groove of the temporary sealing cover 1, the sealing gasket 2 is confirmed to have certain clamping force to keep the sealing gasket from falling off.
As shown in fig. 2, the connecting bolt 3 is mounted on a valve shaft end cover 4 of the valve, and the two are welded and fixed.
As shown in fig. 3, the connecting bolt 3 is screwed with the temporary sealing cover 1 to connect and fix the temporary sealing cover 1 and the valve shaft end cover 4. At the moment, the sealing gasket 2 is compressed and arranged between the temporary sealing cover 1 and the valve shaft end cover 4, so that reliable sealing is realized, and the leakage phenomenon at the position of the valve shaft end cover 4 can be eliminated.
Claims (7)
1. The utility model provides a sealing device is leaked to nuclear power plant's valve shaft end cover which characterized in that: comprises a temporary sealing cover (1), a sealing gasket (2) and a connecting bolt (3);
the temporary sealing cover (1) is of an internal thread sleeve structure and is matched with the external thread of the connecting bolt (3);
a sealing gasket (2) is arranged at the bottom opening end of the temporary sealing cover (1);
the connecting bolt (3) is arranged on the valve shaft end cover (4) of the valve;
the connecting bolt (3) is screwed with the temporary sealing cover (1) in a matched threaded manner, so that the temporary sealing cover (1) and the valve shaft end cover (4) are connected and fixed.
2. The nuclear power plant valve shaft end cap leak seal assembly of claim 1, wherein: and an annular groove is processed at the bottom opening end of the temporary sealing cover (1) and is used for installing and fixing the sealing gasket (2).
3. The nuclear power plant valve shaft end cap leak seal assembly of claim 2, wherein: when the sealing gasket (2) is arranged at the annular groove at the bottom of the temporary sealing cover (1), the sealing gasket (2) is confirmed to be kept not to fall off.
4. The nuclear power plant valve shaft end cap leak seal assembly of claim 1, wherein: and a nut-shaped fastening head is processed at the top sealing end of the temporary sealing cover (1).
5. The nuclear power plant valve shaft end cap leak seal assembly of claim 4, wherein: when the temporary sealing cover (1) and the connecting bolt (3) are screwed to be in contact with the valve shaft end cover (4) of the valve, a spanner is used for continuously screwing the fastening head at the top of the temporary sealing cover (1), so that the sealing gasket (2) is compressed.
6. The nuclear power plant valve shaft end cap leak seal assembly of claim 1, wherein: the connecting bolt (3) is welded and fixed with the valve shaft end cover (4) of the valve.
7. The nuclear power plant valve shaft end cover leakage sealing device of any one of claims 1 to 6, wherein: when the connecting bolt (3) is matched with the temporary sealing cover (1) and screwed, the sealing gasket (2) is compressed and arranged between the temporary sealing cover (1) and the valve shaft end cover (4) of the valve, so that reliable sealing is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121702388.1U CN216078546U (en) | 2021-07-26 | 2021-07-26 | Sealing device for end cover leakage of valve shaft of valve of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121702388.1U CN216078546U (en) | 2021-07-26 | 2021-07-26 | Sealing device for end cover leakage of valve shaft of valve of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216078546U true CN216078546U (en) | 2022-03-18 |
Family
ID=80666430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121702388.1U Active CN216078546U (en) | 2021-07-26 | 2021-07-26 | Sealing device for end cover leakage of valve shaft of valve of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216078546U (en) |
-
2021
- 2021-07-26 CN CN202121702388.1U patent/CN216078546U/en active Active
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