Novel dual-drive fully-closed coal gas water seal gate valve

Abstract

The invention relates to a novel dual-drive fully-closed coal gas water seal gate valve. The novel dual-drive fully-closed coal gas water seal gate valve comprises a valve body, a valve deck and a valve plate; the valve plate is movably arranged in a body cavity formed by the valve body and the valve deck; the valve deck is provided with a valve plate opening and closing mechanism which comprisesa valve opening and closing driving device, an opening and closing rotating shaft and a rocking arm; the valve opening and closing driving device is in key connection with the opening and closing rotating shaft; the opening and closing rotating shaft is in key connection with the rocking arm; a slider I is arranged in an opening groove in the other end of the rocking arm in a sliding manner, and is in movable hinge connection with a connection plate pin column penetrating through the valve plate; the two ends of the connection plate pin column are hinged in through holes of two sliders II; andthe sliders II slide in grooves formed in the valve deck so that the connection plate pin column can drive the valve plate to do linear movement in the body cavity. The novel dual-drive fully-closedcoal gas water seal gate valve has a series of advantages of being small in volume, small in weight, flexible in installing manner, high in opening and closing speed, safer and more reliable in sealing, novel in outline structure and the like.

Description

technical field [0001] The invention relates to the technical field of making gas water-sealed gate valves, in particular to a fully-enclosed gas water-sealed gate valve with double drives and double valve plates, which is suitable for use as a cut-off device on pipelines containing tar-containing gas and pure gas. Widely used in metallurgy, coking and other industries. Background technique [0002] The existing fully enclosed gas flapper valve, also called closed glasses valve, consists of a valve body (composed of left, middle and right parts), a valve plate (composed of a through-hole plate and a blind hole plate), It is composed of valve plate walking mechanism, valve opening and clamping mechanism, and its working principle is as follows: the expansion and clamping mechanism set on the valve body compresses or stretches the bellows set before the valve body seals the valve seat to make it shrink or expand , to realize the separation or compression of the sealing surfac...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing fully enclosed gas flapper valve has large volume, single installation method, large space occupation on the installation site, and easy aging and failure of valve sealing components, resulting in seal leakage. The more convenient and flexible installation method, the safer and more reliable double sealing form of mechanical hard seal and water seal, significantly improves the sealing effect and service life of the valve, a new type of double-drive fully enclosed gas water seal gate valve

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