Novel corrugated pipe valve seal

Abstract

The new bellows valve seal consists of a valve cover, a valve seat, a valve stem and a sealing ring. One end of the bellows is welded and fixed on the valve cover and valve seat, and the other end is welded on the valve stem. The up and down movement of the valve stem drives the bellows to compress or stretch, and the bellows acts as an outer seal and elastic element; For the leak point of external leakage, when the bellows valve is manufactured, the valve cover and the valve seat are welded; it has good sealing performance, and the sealing surface should be able to prevent the medium from penetrating well, and the sealing surface can withstand a certain structural strength. After use, there is still a high sealing reliability; the axial stroke of the bellows is small, and the opening height of the valve sealing surface is required to be small; the overall strength and hydrogen resistance of the bellows are improved, and the processing difficulty is reduced at the same time.

Description

Technical field [0001] The invention relates to a novel bellows valve seal, which is especially used in industrial production machinery. Background technique [0002] As a kind of fluid control equipment, valve sealing is the first problem to be solved, and the sealing performance of valve is one of the important indicators of valve quality. From the point of view of leakage, the seal of the valve is divided into outer seal and inner seal. In this paper, by studying the internal and external sealing performance of the valve, looking for the factors affecting the sealing performance of the valve, and controlling these factors in the design, the bellows valve for the hydrogen and isotope system with reliable sealing is developed. Because the hydrogen treatment system has high requirements on the purity of hydrogen, ordinary packing valves cannot be used, especially when dealing with hydrogen isotopes, any leakage of the valve is absolutely not allowed. For this reason, bellow...

AI Technical Summary

Problems solved by technology

Due to the high price of this bellows valve, although it has better technical advantages than the diaphragm valve, it is still difficult to compete with the diaphragm valve. Generally, this type of valve should be installed horizontally in the pipeline.

However, the sealing structure of the bellows valve is prone to failure during repeated use, so it is necessary to improve the sealing structure

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