Tool for assembling and disassembling valve seat

By designing a valve seat installation and removal tool, the inner rod is used to drive the tapered body upward to cause the soft claws to expand radially, which solves the problem of easy damage to the sealing surface during the maintenance of ultra-low temperature core-pulling valves, realizes a stable and accurate valve seat installation and removal process, and reduces maintenance costs.

CN120620136AActive Publication Date: 2025-09-12XUZHOU AKA CONTROL VALVE CO LTD
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Patent Information

Application Number
CN202511146234.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-15
Publication Date
2025-09-12
Estimated Expiration
2045-08-15

AI Technical Summary

Technical Problem

Existing tools lack mechanical gripping capabilities during the repair of ultra-low temperature core-pulling valves, which can easily cause scratches on the valve seat sealing surface or the inner wall of the valve body, leading to medium leakage and increased repair costs.

Method used

A tool for installing and removing valve seats was designed. The inner rod drives the tapered body upward, applying axial pressure to cause the soft claws to expand radially, tightening the inner wall of the valve seat body. The clamping block and spring cooperate to ensure a stable connection, and the expansion degree of the soft claws is displayed in real time to avoid damage to the sealing surface.

Benefits of technology

It effectively avoids damage to the valve seat sealing surface and the inner wall of the valve body, ensures the stability and accuracy of the loading and unloading process, and reduces the cost of repair rework and material replacement.

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Abstract

The invention relates to the technical field of valve maintenance, and discloses a valve seat assembling and disassembling tool which comprises an outer pressing plate, a pressing rod is fixedly connected to the interior of the outer pressing plate in a penetrating mode, a fastening screw is connected to the interior of the pressing rod in a penetrating and threaded mode, a soft claw is arranged at the bottom end of the pressing rod, and an embedded nut is arranged in the soft claw. The pressing rod and the soft claw are connected through a fastening screw and an embedded nut, a valve body is arranged on the lower surface of the outer pressing plate, a connecting screw is connected to the interior of the outer pressing plate in a penetrating and threaded mode, the outer pressing plate and the valve body are connected through the connecting screw, and the outer wall of the pressing rod is connected to the interior of the valve body in a sliding mode. The inner rod is rotated, the taper body is driven by the inner rod to move upwards, then axial pressure is applied to the soft claw, the soft claw expands in the radial direction, the inner wall of the valve seat body is supported tightly, the inner rod and the pressing rod are lifted, the valve seat body can be brought out of the valve body, and therefore the sealing face of the valve seat body and the inner wall of the valve body can be effectively prevented from being damaged.
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