CN213393548U - Integrated pressure boundary isolation valve - Google Patents
Integrated pressure boundary isolation valve Download PDFInfo
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- CN213393548U CN213393548U CN202020651878.2U CN202020651878U CN213393548U CN 213393548 U CN213393548 U CN 213393548U CN 202020651878 U CN202020651878 U CN 202020651878U CN 213393548 U CN213393548 U CN 213393548U
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- valve
- pressure boundary
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- valve body
- isolation
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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 utility model provides an integrated pressure boundary isolation valve, which is characterized by comprising two sets of independent valve bodies, wherein each valve body comprises a valve cover, a valve clack, a valve rod and a valve operating mechanism, and the stroke of the valve clack can be independently operated; the outlet end of one set of independent valve body with the entrance connection of another set of independent valve body has the interlude, the interlude with two sets of poison ground valve body integrated into one piece. The structure of the utility model cancels the connecting pipeline between two isolating valves, which is beneficial to simplifying the structure of the pressure boundary; meanwhile, welding seams between the two isolation valves and the connecting pipeline are eliminated, the reliability of the pressure boundary is improved, and the number of the welding seams to be detected during in-service inspection can be reduced; the two independent valve clacks, the valve cover and the valve operating mechanism are convenient to manufacture, and the original function of the valve is not influenced.
Description
Technical Field
The utility model belongs to the valve field especially relates to nuclear power station reactor coolant pressure boundary isolation valve.
Background
The reactor coolant pressure boundary in the nuclear power station refers to a boundary containing the reactor coolant and radioactive substances under the operation temperature and pressure, and is an important barrier for preventing the radioactive fission products from leaking out, and the reactor coolant pressure boundary comprises a pressure vessel, a pipeline, a pump, a valve and the like. Isolation valves are typically used to isolate the reactor coolant pressure boundary system from the adjacent system as part of the reactor coolant pressure boundary.
At least two series-connected isolation valves should be provided as reactor coolant pressure boundaries, as required by 10CFR 50. Usually, the two isolation valves are connected with the equipment or the pipeline by welding. At least 4 nuclear primary welds exist between isolation valves, devices, or pipes. According to the requirements of ASME specifications, when a power station operates, welding seams between isolation valves, equipment or pipelines need to be inspected in service regularly. The presence of welds increases the risk and workload of field construction and subsequent in-service operation, while pressure boundary isolation valves are typically in highly radioactive areas, which also increases personnel exposure doses. Meanwhile, the risk of coolant leakage or pipeline breakage at the welding seam is increased, and the safe operation of a power plant is not facilitated.
FIG. 1 is a conventional arrangement of reactor coolant pressure boundary isolation valves, with two isolation valves in series and connected to a pipeline by welding, and at least two welds between the isolation valves. Fig. 2 is a conventional structure type of a reactor coolant pressure boundary isolation valve, which is composed of a valve body, a valve cover, a valve clack, a valve rod and the like.
The traditional setting mode of the reactor coolant pressure boundary isolation valve cannot eliminate welding seams between the isolation valves, increases welding seam inspection work during on-site welding work and in-service inspection, and increases personnel irradiation dose. Meanwhile, the risk of coolant leakage or pipeline breakage at the welding seam is increased, and the safe operation of a power plant is not facilitated. The utility model discloses a reactor coolant pressure boundary isolation valve of integration, through the integration casting of valve body, eliminated the welding seam between the traditional pressure boundary isolation valve, reduced site operation and at the work load of labour inspection, eliminated the risk of pipeline breach between the isolation valve, strengthened the leakproofness of isolation valve, improved the security and the economic nature of nuclear power station.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integration reactor coolant pressure boundary isolation valve, this isolation valve are used for optimizing reactor coolant pressure boundary structure, improve pressure boundary's leakproofness, reduce the leakage to simplify the process at labour's inspection, improve the security and the economic nature of power station. The isolating valve comprises two sets of independent valve bodies, each valve body comprises a valve cover, a valve clack, a valve rod and a valve operating mechanism, and the stroke of the valve clack can be independently operated; the outlet end of one set of independent valve body with the entrance connection of another set of independent valve body has the interlude, the interlude with two sets of independent valve body integrated into one piece.
Preferably, the middle section is convenient for in-service inspection, maintenance and test of the valve.
The utility model provides an integration pressure boundary isolation valve has replaced the twice isolation valve of establishing ties originally with the cast isolation valve of integration. The novel structure cancels a connecting pipeline between two isolating valves, which is beneficial to simplifying the structure of a pressure boundary; meanwhile, welding seams between the two isolation valves and the connecting pipeline are eliminated, the reliability of the pressure boundary is improved, and the number of the welding seams to be detected during in-service inspection can be reduced. In addition, the integrated pressure boundary isolation valve is provided with two independent valve clacks, a valve cover and a valve operating mechanism, so that the integrated pressure boundary isolation valve is convenient to manufacture and does not influence the realization of the original functions of the valve.
Drawings
FIG. 1 is a schematic diagram of a conventional arrangement of a reactor coolant pressure boundary isolation valve.
Fig. 2 is a conventional configuration of a reactor coolant pressure boundary isolation valve.
Figure 3 is the utility model discloses an integration reactor coolant pressure boundary isolation valve schematic diagram.
Wherein, 1, valve body, 2, valve rod, 3, valve gap, 4 valve clacks.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The present invention will be described in further detail with reference to fig. 3.
The integrated pressure boundary isolating valve mainly comprises a valve body, a valve cover, a valve clack, a valve rod and the like. Wherein the valve body is different from the traditional valve body, adopts two valve body structure integration casting forming, and the valve body interlude is suitable extension simultaneously, and the valve of being convenient for is in service inspection, maintenance and experiment. The valve is provided with two independent valve clacks, a valve cover and a valve operating mechanism, can independently perform stroke operation on the valve clacks, and can perform the functions of two series isolation valves.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (1)
1. An integrated pressure boundary isolation valve is characterized by comprising two sets of independent valve bodies, wherein each valve body comprises a valve cover, a valve clack, a valve rod and a valve operating mechanism, and the stroke of the valve clack can be independently operated; the outlet end of one set of independent valve body with the entrance connection of another set of independent valve body has the interlude, the interlude with two sets of independent valve body integrated into one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651878.2U CN213393548U (en) | 2020-04-26 | 2020-04-26 | Integrated pressure boundary isolation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020651878.2U CN213393548U (en) | 2020-04-26 | 2020-04-26 | Integrated pressure boundary isolation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213393548U true CN213393548U (en) | 2021-06-08 |
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ID=76178234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020651878.2U Active CN213393548U (en) | 2020-04-26 | 2020-04-26 | Integrated pressure boundary isolation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213393548U (en) |
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2020
- 2020-04-26 CN CN202020651878.2U patent/CN213393548U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |