A tooling and method for overhauling a main start valve

By designing maintenance fixtures with sleeves and levers, the problem of not being able to directly disassemble and repair the main start valve on shipping vessels was solved, enabling valve stem replacement and valve core grinding, reducing costs and improving applicability.

CN116141243BActive Publication Date: 2026-05-26CHINA SHIPBUILDING IND GRP DIESEL ENGINE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA SHIPBUILDING IND GRP DIESEL ENGINE CO LTD
Filing Date
2023-02-08
Publication Date
2026-05-26

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Abstract

This invention discloses a main start valve maintenance fixture and method, belonging to the field of maintenance fixture technology. It includes a sleeve, one end of which is used to fix a valve stem nut, and the other end is fitted with a stud head. A lever is fixed perpendicularly to the sleeve axis at the end of the sleeve near the stud head. A threaded hole is formed at a set distance between the sleeve and the lever, allowing a connecting piece to pass through and fix the valve stem. The lever is rotated to remove the nut, or the stud head can be used with a pneumatic or electric wrench to grind the valve core. This invention enables both valve stem replacement and valve core grinding of the main start valve, allowing for maintenance based on the damage condition of the main start valve, increasing applicability and reducing costs.
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