Nuclear-grade pneumatic gate valve

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...

AI Technical Summary

Problems solved by technology

The existing pneumatic gate valve has a simple structure and poor shock resistance, which cannot meet the actual needs of "Hualong One"

Moreover, high-end valves still need to rely on imports

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