Valve on-line welding apparatus

By designing an online valve welding device, a three-axis positioning and attitude adjustment mechanism for the welding torch within the valve bore is achieved using rotation, horizontal drive, lifting, and angle adjustment. This solves the problem of manual welding in confined spaces, enables online repair of valve sealing surfaces, and avoids the high cost and long cycle of complete replacement.

CN122353152APending Publication Date: 2026-07-10CHINA GENERAL NUCLEAR POWER OPERATION
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Patent Information

Application Number
CN202610631030.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-08
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, valve sealing surfaces are prone to defects due to media erosion, corrosion, and mechanical wear. Manual welding is difficult to perform in confined spaces, has poor continuous welding performance, and results in unstable welding quality, making it impossible to effectively repair the defects. Typically, the entire valve needs to be replaced, which increases the construction period and cost.

Method used

Design an online valve welding device, including a base, a rotating mechanism, a horizontal drive mechanism, a lifting mechanism, and an angle adjustment mechanism. Through three-axis positioning and attitude adjustment, the welding torch can be aligned at any position and angle inside the valve, replacing manual welding for online repair.

Benefits of technology

This technology enables efficient repair of valve sealing surfaces, avoids complete replacement, reduces construction time and costs, and improves welding quality and ease of operation.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122353152A_ABST
    Figure CN122353152A_ABST
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Abstract

This application provides an online valve welding device, including a base, a rotating mechanism, a horizontal drive mechanism, a lifting mechanism, a welding torch clamping mechanism, and an angle adjustment mechanism. The base is used to install on the flange face of the valve to be repaired; the rotating mechanism is disposed on the base and includes a turntable that can rotate relative to the base; the horizontal drive mechanism is disposed on the turntable; the lifting mechanism is connected to the horizontal drive mechanism; the welding torch clamping mechanism is used to clamp the welding torch and is disposed on the lifting mechanism; the angle adjustment mechanism is connected between the welding torch clamping mechanism and the lifting mechanism and is used to adjust the tilt angle of the welding torch. The online valve welding device provided by this application, through the cooperation of the rotating mechanism, the horizontal drive mechanism, and the lifting mechanism, achieves three-axis positioning of the welding torch in space, enabling it to reach any position inside the valve bore; through the angle adjustment mechanism, the welding torch posture is adjusted, allowing it to be aligned with the inner wall of a deep hole or a conical sealing surface at a suitable angle.
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