a gate valve

Abstract

The invention discloses a gate valve, comprising a valve body, a valve cavity is arranged in the valve body, a valve cover is fixedly installed on the valve body; a left connecting pipe and a right connecting pipe are arranged on the side of the valve body, the The left connecting pipe and the right connecting pipe are coaxially arranged; a vertical plate is arranged in the valve chamber, and a mounting block is arranged above the vertical plate, and a through chute hole is provided in the mounting block, and the sliding slot A left connecting rod and a right connecting rod are slidingly connected in the slotted hole, the left end of the left connecting rod is provided with a left valve disc, the right end of the right connecting rod is provided with a right valve disc; Slotted hole, a vertically arranged power disc is rotatably connected in the rotary slot hole, a left power slot and a right power slot are arranged on the described power disc, a left protruding column is arranged on the left connecting rod, and a left convex column is arranged on the right connecting rod. There is a right protruding post; the gate valve also includes a power assembly for driving the power disc to reciprocate; the gate valve not only has a simple structure, but also does not generate friction between the valve disc and the valve port when it is opened and closed.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, and in particular relates to a gate valve. Background technique [0002] Slab gate valve is a kind of sliding valve whose closing parts are parallel gates. It is widely used in pipelines in petroleum, chemical industry, pharmaceutical, metallurgy, coal, electric power industry, urban water supply and drainage and other industries to control the flow and cut off of pipeline media. , is one of the most widely used valves in various fluid conveying projects. The closing part of the gate valve is generally composed of a gate plate and a valve seat. The pressing force of the gate plate to the valve seat is controlled by the medium pressure acting on the gate plate. The medium pushes the gate plate to press the valve seat to form a seal. At present, most During the opening and closing process of the flat gate valve, the sealing surface of the valve seat and the valve plate is always in contact...

AI Technical Summary

Problems solved by technology

The closing part of the gate valve is generally composed of a gate plate and a valve seat. The pressing force of the gate plate to the valve seat is controlled by the medium pressure acting on the gate plate. The medium pushes the gate plate to press the valve seat to form a seal. At present, most During the opening and closing process of the flat gate valve, the sealing surface of the valve seat and the valve plate is always in contact, that is, every time the valve is opened and closed, the sealing surfaces of the valve seat and the valve plate are constantly rubbing against each other, resulting in the valve The switching torque is large, and the wear of the valve seat and valve plate is accelerated, resulting in a short service life of the valve

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