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Bypass check valve for containment isolation system

An isolation system and check valve technology, applied in valve details, control valves, valve devices, etc., can solve problems such as poor sealing of check valves, reduce sealing surface wear, avoid movement, and facilitate online maintenance.

Inactive Publication Date: 2014-02-12
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the check valve of the nuclear power plant in the prior art has poor sealing performance

Method used

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  • Bypass check valve for containment isolation system

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Embodiment Construction

[0015] The sectional view of the bypass check valve of the containment isolation system of the present invention will be described in detail below with reference to the drawings and embodiments.

[0016] Such as figure 1 As shown, the containment isolation system bypass check valve of the present invention includes a valve body 1 , a valve cover 11 , a valve core 5 , a valve disc 2 and a compression spring 6 . The valve cover 11 is threadedly connected to the upper part of the valve body 1; the valve body 1 is provided with a valve core 5, a valve cavity input channel and a valve cavity output channel; The flap 2 and the valve body 1 form a closable section. When the medium pressure in the input channel of the valve cavity is large enough, that is, when the check valve is in an overpressure state, the medium pushes the valve disc 2, the valve core 5 and the compression spring 6 to move along the guide sleeve 4 set in the valve body, and the valve disc 2 and the valve The bod...

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Abstract

The invention belongs to the technical field of a check valve of a nuclear power unit and particularly relates to a bypass check valve for a containment isolation system. The check valve disclosed by the invention comprises a valve body (1), a valve cover (11), a valve element (5), a valve flap (2) and a hold-down spring (6); the valve cover (11) is connected to the upper part of the valve body (1) by screw threads; the valve element (5), a valve cavity input passage and a valve cavity output passage are arranged inside the valve body (1); the lower end of the valve element (5) sleeved with the hold-down spring (6) is provided with the valve flap (2); and a section capable of being closed is formed by the valve flap (2) and the valve body (1). The check valve disclosed by the invention is effectively controlled to be opened and closed by arrangement of the hold-down spring and not only can meet the pressure relief requirement under an overpressure condition, but also can meet the sealing requirement under a static condition; moreover, the check valve disclosed by the invention can be installed on horizontal pipelines, vertical pipelines and pipelines with inclination angles and meets the requirement of changeability of the pipelines on site.

Description

technical field [0001] The invention belongs to the technical field of check valves for nuclear power plants, and in particular relates to a bypass check valve for a containment isolation system. Background technique [0002] At present, nuclear power plants at home and abroad are equipped with safety isolation systems to ensure that the radioactivity can be controlled in a certain area in the event of an accident in a nuclear reactor. Considering that most nuclear power plants operate under high temperature and high pressure conditions, the system connected to the main circuit must be isolated as soon as possible under accident conditions. Therefore, overpressure protection facilities must be set up for the isolation system to ensure that the isolation system is isolated under severe accident conditions. It is not damaged, thereby controlling the diffusion path of radioactive materials. At present, the most commonly used overpressure protection facility in nuclear power pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/06
CPCF16K15/063F16K27/0209
Inventor 朱金雄陈林林张昭陈桂良顾朝党郑兰疆周天付小军张震茆秋华
Owner JIANGSU NUCLEAR POWER CORP
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