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Safety valve for nucleus

A safety valve, nuclear technology, applied in the field of safety valve, can solve the problems of pressure medium, high temperature impact, easy damage, etc., to achieve the effect of light weight, high reliability and wide use

Inactive Publication Date: 2005-03-09
川开阀门有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In the Sibem safety valve group in France, once the single-function safety valve (A valve) as a safety release fails to close, the main valve of A valve does not close by closing the second single-function safety valve (B valve) connected in series. , but it cannot solve the loss of pressure medium caused by the failure of the two auxiliary valves
[0019] The main valve of the Sibeim safety valve group in France is sealed with a bellows, which is necessary to enable two single-function safety valves to be combined in series. However, the bellows are subject to high temperature and impacted by high temperature, and are easily damaged.

Method used

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  • Safety valve for nucleus
  • Safety valve for nucleus

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Embodiment Construction

[0039] The novel nuclear safety valve provided by the invention is composed of an auxiliary valve, a main valve, a relay valve, and a forced opening and closing solenoid valve. The structure of the main valve is as figure 1 As shown, the main valve seat (31), (32) is screwed in the main valve body (30) from bottom to top in the form of threaded connection, and the annular space formed by the main valve seat (31), (32) and the pulse Pipe (29) is connected. The main valve disc (33) is covered on the main valve seat (31), and the main valve rod (28) fixedly connected with the main valve disc (33) has a threaded part at the lower end to pass through the piston (67). Nut (26) is affixed on the piston (67) with main valve stem (28). The compression force of the pre-tightening spring (27) acting on the piston (67) acts on the main valve disc (33) through the main valve rod (28), so that part of it becomes the pre-tightening sealing force of the main valve disc (33). . The other p...

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Abstract

A high-safety valve for nuclear power unit is composed of three functional modules: safety release, fast isolation and forced opening or closing. It has a primary valve and a secondary valve. When external valve flap is closed, the safety release and secondary valve can be cut off at the same time. Its advatnages are small size, light weight, high reliability and long service life.

Description

1. Technical field [0001] The present invention relates to a safety valve, especially a nuclear safety valve. [0002] Nuclear safety valve is an important equipment in nuclear overpressure protection system. The opening and closing of nuclear safety valves must not only meet the requirements of nuclear regulations, but also be able to open and close reliably. Once the opening and closing failure occurs, if there is no timely rescue measure, it may cause the core to lose heat carrier and burn down. [0003] The opening of the safety valve has been better solved, such as using multiple safety valves in parallel. Because it is impossible for all safety valves not to open when the system is overpressured. However, as long as one of the safety valves is not closed after opening, if no timely remedial measures are taken, it may lead to core dehydration. [0004] Usually, in order to ensure that the closing failure of the safety valve does not cause the system to lose too much h...

Claims

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Application Information

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IPC IPC(8): F16K17/00
Inventor 赵文轩
Owner 川开阀门有限责任公司
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