Soft sealing safety valve

By introducing variable adjustment rings and second set screws into the soft seal safety valve to adjust the fitting force between the soft seal and the valve seat, the problem of excessive deformation of the traditional soft seal is solved, and the seal stability and service life are improved.

CN223178239UActive Publication Date: 2025-08-01UNIVERSAL VALVE CO LTD
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Patent Information

Application Number
CN202422623307.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2025-08-01
Estimated Expiration
2034-10-29

AI Technical Summary

Technical Problem

Traditional soft seal spring-type safety valves have excessive pressure on the soft seal and valve seat due to machining errors or unreasonable thickness of soft seals, causing excessive local deformation and excessive damage, shortening service life and increasing maintenance costs.

Method used

The variable adjustment ring and the second tightening screw are used to adjust the fitting force between the soft seal and the valve seat. The deformation of the soft seal is adjusted by changing the height difference between the variable adjustment ring and the valve flap when the top contacts, and the recoil body and the pressure gland design are combined to uniformly bear the force to ensure a stable fit between the soft seal and the valve seat.

Benefits of technology

Extends the service life of soft seals, improves seal stability, and reduces maintenance frequency and cost.

✦ Generated by Eureka AI based on patent content.
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Abstract

According to the technical scheme, the soft sealing safety valve is characterized by comprising a valve body, a valve seat inserted into the valve body, a valve clack arranged opposite to the valve seat, a soft sealing piece positioned on the valve clack and capable of being attached to the valve seat, an adjusting ring capable of rotating relative to the valve seat and a first set screw capable of limiting rotation of the adjusting ring and connected to the valve body. The variable adjusting ring is in threaded connection with the exterior of the valve seat and located in the valve body, the second set screw is used for limiting rotation of the variable adjusting ring and connected to the valve body, the adjusting ring is in threaded connection with the exterior of the variable adjusting ring, and the valve seat, the adjusting ring and the variable adjusting ring are coaxially arranged; the height of the second set screw is smaller than that of the first set screw, the inner diameter of the variable adjusting ring is larger than the diameter of the soft sealing piece, and the problem that in the prior art, the soft sealing piece is prone to being damaged, and sealing performance is affected is solved.
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