Parallel double gate disc swing gate valve

Abstract

The invention discloses a gate valve, and provides the parallel double gate disc swing gate valve which can be positively and negatively installed on a multi-impurity fluid pipeline and is rapidly opened and closed, and is small in resistance, good in sealing performance and high in reliability. The technical problems that in the prior art, a gate valve can be only vertically installed, is large in opening and closing resistance, poor in reliability and short in service life, and can not be used under the poor condition that the content of impurities is high are solved. The parallel double gate disc swing gate valve comprises a valve body and a valve body accommodating cavity formed in the valve body. A valve inlet and a valve outlet which are communicated to the valve body accommodating cavity are formed in the two ends of the valve body respectively. A torsion shaft is rotationally connected in the valve body accommodating cavity, stretches out of the valve body and is connected with the valve body in a sealing mode, one end of a swing arm is connected to the torsion shaft in the valve body accommodating cavity, an upper gate disc and a lower gate disc are arranged at the other end, opposite to the torsion shaft, of the swing arm, the upper gate disc and the lower gate disc correspond to the valve inlet and the valve outlet respectively and are connected to the swing arm through a wedge and a sliding block which are mutually matched, and the sliding block stretches out of the upper gate disc and the lower gate disc.

Description

technical field [0001] The invention relates to a gate valve, in particular to a parallel double gate swing gate valve which can be installed forward and reversely on pipelines with many impurities, even gas-solid and solid-liquid mixed media, and has small valve switch resistance and good sealing performance. . Background technique [0002] Valves are control components in fluid delivery systems, generally including gate valves, globe valves, throttle valves, ball valves, butterfly valves, etc. Among them, gate valves are the most widely used and most frequent, and gate valves are divided into parallel gate valves and wedge gate valves, etc. In the process of use, the seal of two moving parts is the most important. One is the switch seal between the gate plate and the valve body when the valve is turned off, and the second is the valve stem packing seal that reciprocates when the valve is turned off. , while the existing parallel swing gate valve is generally provided with...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly provides a parallel double gate swing gate valve which can be installed in the forward and reverse directions on the multi-impurity fluid pipeline, and at the same time, the valve switch is quick, the resistance is small, the two-way seal is good, the sealing performance is high, and the reliability is high. The existing gate valves in the prior art can only be installed vertically, have large switching resistance, poor reliability, short service life, and cannot be used under the harsh conditions of high impurity content and slurry, solid-liquid or gas-solid mixed flow. question

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