Nuclear-grade sluice valve seat sealing ring online repair automatic welding device and method

Abstract

The invention relates to the technical field of nuclear-grade sluice valve seat sealing ring repair and specifically discloses a nuclear-grade sluice valve seat sealing ring online repair automatic welding device and method. The device comprises a locating component, a driving component and a rotary disk gun head assembly, wherein the locating component is arranged on the end face of a flange in avalve in a matched mode; the driving component is mounted on the locating component and can move front and back, and up and down relative to the locating component; the rotary disk gun head assemblyis arranged at the lower end of the driving component; the driving component can drive a welding gun of the rotary disk gun head assembly to rotate by 360 degrees; and meanwhile, the welding gun can move in the axial and radial directions of the welding gun within a certain range. Through the nuclear-grade sluice valve seat sealing ring online repair automatic welding device and method, a series of problems that a nuclear-grade sluice valve seat sealing surface is hard to repair, the defect can be overcome just by replacing the whole valve, and the long cycle, high cost and high radiation occur in the replacement process are solved.

Description

technical field [0001] The invention belongs to the technical field of nuclear-grade gate valve seat seal ring repair, and in particular relates to an online repair automatic welding device and method for a nuclear-grade gate valve seat seal ring. Background technique [0002] Nuclear grade valves play the role of controlling and regulating the pressure, temperature, flow direction and flow rate of the medium in nuclear power plants. Among them, the most widely used and most common is the gate valve, but the design, experiment, manufacturing process, and testing system of the gate valve with a high nuclear safety level are only mastered by a few western companies. Therefore, when the valve sealing surface has large defects that are difficult to repair, Nuclear power plants can only eliminate defects by replacing the entire valve. At the same time, it is also necessary to face a long procurement cycle for gate valves with a high nuclear safety level, and it is likely that th...

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Problems solved by technology

[0006] The purpose of the present invention is to provide an automatic welding device and method for on-line repair of the seat sealing ring of nuclear-level gate valves, so as to solve the problem that the current nuclear-level gate valve seat sealing surface has defects that are difficult to repair. The status quo of a series of difficult problems such as cycle time, high cost, and high radiation

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