Nuclear-grade pneumatic gate valve

A kind of pneumatic gate valve, nuclear-grade technology, applied in sliding valve, valve details, valve device and other directions, can solve the problems of poor shock resistance, simple structure, high-end valve dependence on imports, etc., to reduce weight and volume, reduce axial force , the effect of reducing weight and height

Pending Publication Date: 2020-04-21
SUFA TECH IND CNNC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing pneumatic gate valve has a simple structure and poor shock resistance, which canno

Method used

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  • Nuclear-grade pneumatic gate valve
  • Nuclear-grade pneumatic gate valve

Examples

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Example Embodiment

[0015] As attached Figure 1~2 As shown, a nuclear-grade pneumatic gate valve is set on the lowermost valve body with a bonnet, a pneumatic actuator is arranged on the bonnet, and a connecting rod is arranged in the center of the pneumatic actuator, and the connecting rod is fixedly connected with the valve stem, inside the valve body Set the ram frame and ram, set the ram on the ram frame, and set the packing on the valve cover.

[0016] The valve body, the valve cover and the pneumatic actuator are integrally connected by a middle flange stud.

[0017] The gate is a spring-type parallel double gate structure, which will not cause wedging phenomenon at high temperature, and can effectively reduce the valve opening and closing axial force, reducing the weight and volume of the pneumatic actuator.

[0018] An upper seal is arranged at the connection between the valve stem and the valve cover, and a valve seat seal is arranged at the connection between the valve body and the gate plat...

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Abstract

The invention belongs to pneumatic gate valves, and particularly relates to a nuclear-grade pneumatic gate valve. According to the nuclear-grade pneumatic gate valve, a valve deck is arranged on a valve body arranged at the lowest end, a pneumatic executing mechanism is arranged on the valve deck, a connecting rod is arranged in the center of the pneumatic executing mechanism, the connecting rod is fixedly connected with a valve rod, a wedge disc frame is arranged in the valve body, a wedge disc is arranged on the wedge disc frame, and filler is further arranged on the valve deck. The nuclear-grade pneumatic gate valve has the remarkable effects that the phenomenon of fixed wedging is avoided, the switching on and off axial force of the valve can be effectively reduced, the weight and thesize of the pneumatic executing mechanism are reduced, the overall weight and the overall height of the valve are reduced, a valve rod live load, guide and limiting and sealing structure is arranged at the position of the valve rod, filler pre-tightening load dynamic compensation is achieved, and the sealing requirements under multiple working conditions are met. The safety-grade pneumatic executing mechanism is adopted as a drive mechanism, and the rate is K3. When the valve is mounted, a corresponding supporting structure is additionally arranged, and the anti-shake requirements of the anti-shake 1A class and three directions 6 g are met.

Description

technical field [0001] The invention belongs to a pneumatic gate valve, and in particular relates to a nuclear-level pneumatic gate valve with a nuclear safety level two or three, meeting the requirements of anti-seismic category 1A, and adopting a pneumatic actuator. Background technique [0002] "Hualong One" is a third-generation nuclear power plant developed and designed with the highest international safety standards, and its safety performance indicators have reached the advanced level of international third-generation nuclear power technology. [0003] Many gate valves are used in "Hualong One". The existing pneumatic gate valve has a simple structure and poor anti-seismic ability, which cannot meet the actual needs of "Hualong No. 1". Moreover, high-end valves still need to rely on imports. Therefore, there is an urgent need to develop a nuclear-grade pneumatic gate valve with independent intellectual property rights in my country. Contents of the invention [0...

Claims

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Application Information

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IPC IPC(8): F16K3/18F16K31/12F16K41/02
CPCF16K3/18F16K31/12F16K41/02
Inventor 刘平胡金辉严新虹陈时健王兰群苏丽华周巍巍李军业
Owner SUFA TECH IND CNNC
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