Sealing structure of surge relief valve

Abstract

The invention relates to the field of valve design, in particular to a sealing structure of a surge relief valve. The sealing structure comprises sealing blocks, O-shaped rings I, a fixing sleeve, O-shaped rings II, a pressing block and set screws. Sealing grooves and dovetail grooves are formed in a valve clack of the surge relief valve. Threaded holes are formed in the valve clack and the pressing block at equal intervals correspondingly. The set screws are arranged in the threaded holes. The O-shaped rings I are fixedly arranged in the sealing grooves through the pressing block, and the O-shaped rings I and the fixing sleeve form an axial seal. As a main seal of the surge relieve valve, the sealing blocks are arranged in the dovetail grooves, and the sealing blocks and the fixing sleeve form an auxiliary seal of the surge relief valve. The sealing structure of the surge relief valve is provided with the main seal and auxiliary seal double sealing structure; the auxiliary seal bears medium impact brought by the valve clack when the valve is opened and closed, and the sealing blocks or the sealing rings can be effectively protected; and meanwhile, it can be guaranteed that media in a pipeline does not leak when the valve is closed, and the sealing structure can be applied to pipelines for conveying high-viscosity media containing solid particles.

Description

technical field [0001] The invention belongs to the field of valve design, and in particular relates to a sealing structure of a water hammer pressure relief valve. Background technique [0002] Water hammer relief valves are commonly used in the pipeline system to protect the pipeline from water hammer, avoiding water hammer caused by excessive valve switching, sudden start and stop of pumps, and sudden stuck pipe pigs, etc. Damage to small pipelines and station equipment. [0003] At present, the water hammer pressure relief valves used at home and abroad need to ensure that the valve does not leak before opening and after closing. The main seal is generally composed of a valve disc, a sealing block or a sealing ring, and a fixed sleeve. However, during the opening and closing process of the valve, the action of the disc will bring impact to the sealing block or sealing ring, and it will cause certain damage after frequent actions, resulting in sealing failure and valve l...

AI Technical Summary

Problems solved by technology

However, during the opening and closing process of the valve, the action of the disc will bring impact to the sealing block or sealing ring, and it will cause certain damage after frequent actions, resulting in sealing failure and valve leakage; at the same time, there may be solid impurities in the medium in the pipeline, Such as sand, stones or welding slag left in the pipeline during the installation process, when the valve is opened and closed, solid impurities wash away the sealing block or sealing ring with the medium in the pipeline and directly cause damage to it, resulting in seal failure. leakage

[0004] So far, there is no sealing structure of water hammer pressure relief valve that can not only solve the impact of the disc action on the sealing structure, effectively protect the sealing block or sealing ring, but also ensure the sealing performance in the medium pipeline containing solid impurities.

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