Valve rod structure of gate valve

By introducing a limit cover, a sealing ring, a lubrication mechanism and a sealing mechanism into the gate valve stem structure, the problem of the non-stem gate valve getting stuck due to rust is solved, the effective use of lubricating oil and the reliable operation of the valve are achieved, and the service life of the gate valve is extended.

CN223375143UActive Publication Date: 2025-09-23NANJING AIJIA FLUID CONTROL CO LTD
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Patent Information

Application Number
CN202422917868.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-09-23
Estimated Expiration
2034-11-28

AI Technical Summary

Technical Problem

After long-term use, the substances transported in the pipeline may cause rust between the valve stem and the valve, resulting in sticking or inability to rotate, affecting the operating performance of the valve and shortening the service life of the gate valve.

Method used

A gate valve stem structure is designed, including a limit cover, a sealing ring, a lubrication mechanism and a sealing mechanism. Through the groove seal of the limit cover, the oil delivery channel and oil outlet channel of the lubrication mechanism, and the sealing gasket of the sealing mechanism, it is ensured that the lubricating oil does not leak and effectively lubricates the valve stem and thread groove, thereby enhancing the operating performance and service life of the valve.

Benefits of technology

It effectively avoids the leakage of lubricating oil, improves the operating performance of the valve, extends the service life of the gate valve, and enhances the pressure bearing capacity of the valve.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The utility model provides a gate valve rod structure, which belongs to the technical field of gate valves and comprises a pipeline, a valve body is mounted on the pipeline, the valve body comprises a valve rod rotatably connected onto the valve body, threads are arranged on the valve rod, a valve is slidably connected onto the valve rod, and the valve rod is connected with a valve rod. The valve is inserted into the pipeline in a sliding mode, the bottom of the valve abuts against the inner wall face of the pipeline, the valve rod is further fixedly connected with a limiting cover, a sealing ring is arranged below the limiting cover, lubricating mechanisms are arranged on the valve and the valve body, and a sealing mechanism is arranged at the lower end of the valve. The non-rising stem gate valve solves the problems that after an existing non-rising stem gate valve is used for a long time, materials conveyed in a pipeline can cause rusting between a valve rod and the valve, the valve rod is stuck or cannot rotate during rotation, clamping stagnation and blocking can seriously affect the operation performance of the valve, even the valve can lose efficacy, and the valve is damaged. And the service life of the gate valve is greatly shortened.
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