Linkage valve

Abstract

The invention discloses a linkage valve. The linkage valve comprises a hand wheel, a screw rod is arranged at the bottom of the hand wheel, a threaded connector is arranged at the bottom end of the screw rod, the top end of the threaded connector penetrates through the hand wheel and is fixedly connected with a nut arranged at the top of the hand wheel, a limiting sleeve and a locking plate are sequentially arranged on the upper portion of the screw rod, the limiting sleeve is located at the top of the locking plate, an upper shell body is arranged at the bottom of the locking plate, the uppershell body is of a cavity structure, a fixed plate I is arranged on the outer side of the bottom of the upper shell body, a screw rod sleeve is arranged at the top of the inner side of the upper shell body, a sealing gasket I is arranged between the screw rod sleeve and the locking plate, a partition plate is arranged in the middle of the inner side of the upper shell body, sealing diaphragms arearranged on the side edge of the partition plate, the partition plate is hermetically connected with the inner wall of the upper shell body through the sealing diaphragms, a buffer pad is arranged atthe bottom of the partition plate, and a sealing sliding sleeve I is arranged in the middle of the partition plate and the middle of the buffer pad. The linkage valve has the beneficial effects thatthe higher requirement on the air tightness of the linkage valve is effectively reduced, and the production cost and the use cost are reduced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a linkage valve. Background technique [0002] Linked valves are widely used in natural gas pipelines for long-distance transportation. They have the advantages of stable transmission and easy control. At present, the mainstream linked valves on the market are gas-liquid linked. Compared with ordinary linked valves, the structure is more complicated and the operation is easier. Various, but because the liquid is different from the gas, the liquid has high requirements on air tightness when used, and the later maintenance is also difficult. Therefore, it is very necessary to design an air linkage valve. Prior art 1: CN101220871B discloses a magnetic linkage valve that does not need packing and sealing ring sealing, which consists of a valve body, a valve plate, a valve stem assembly, an inner rotor, an outer rotor, an isolation cover, a geared motor and / or manual components . I...

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Problems solved by technology

[0003] However, the production and use costs of the above-mentioned interlocking valve are relatively high, the sealing performance is poor, and there is a large amount of leakage; the structural strength of the upper shell is not high, etc.

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