Corrugated pipe for control valve and welding auxiliary tool and welding method thereof
By combining brazing vacuum welding with welding auxiliary tooling, the problems of high cost and poor quality in bellows welding have been solved, achieving high airtightness connection and stress relief treatment, thus improving the reliability and service life of the control valve.
CN122107181APending Publication Date: 2026-05-29SUZHOU XUANCHANG ELECTROMECHANICAL TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU XUANCHANG ELECTROMECHANICAL TECH CO LTD
- Filing Date
- 2026-03-04
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing bellows welding processes are costly, complex, and produce poor welding quality, resulting in insufficient reliability and service life of control valves.
Method used
By employing brazing vacuum welding combined with welding auxiliary tooling, and through the use of limit seats, elastic supports, and vacuum welding methods, a high airtight connection and stress relief are achieved between the tube body and the end cap. The welding auxiliary tooling is used for precise positioning and clamping.
Benefits of technology
Reduce production costs and process complexity, improve welding quality and sealing reliability, and extend equipment life.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122107181A_ABST
Abstract
The application provides a corrugated pipe for a control valve and a welding auxiliary tool and a welding method thereof. The corrugated pipe for the control valve comprises a pipe body, a limiting seat, an end cover and an elastic support. The open end of the pipe body has a necking portion which is gradually narrowed in the direction away from the closed end. The end cover is connected with the open end through vacuum brazing. The welding auxiliary tool comprises a base, a pressing plate, a sleeve and a locking nut. The welding method comprises the steps of preparation, pre-assembly, necking, assembly and vacuum brazing. The necking structure of the pipe body can pre-fix the end cover and avoid the end cover from being pushed out during use, thereby improving the reliability of the equipment and prolonging the service life of the equipment. The welding auxiliary tool can ensure the positioning accuracy of the pipe body and the end cover and the stability of the overall assembly. The high-airtightness welding and stress relief treatment are simultaneously completed in the one-time furnace heating process, thereby significantly improving the welding reliability, consistency and production efficiency of the corrugated pipe, and reducing the production cost and process complexity.
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