Automatic compensation type industrial gate valve

Abstract

The invention belongs to the technical field of valves, and particularly relates to an automatic compensation type industrial gate valve. The valve comprises a valve body, a supporting plate, a gate plate, a valve rod, a valve cover, extrusion plates, a liquid bag, a sealing block, a top cover, a hand wheel, a first sealing ring, a second sealing ring and a first screw. The hand wheel is rotated to drive the valve rod to rotate, so that the gate plate rotationally connected with the lower end of the valve rod falls into the valve body, liquid in a pipeline of the valve body is blocked, and the effect of interrupting the liquid is achieved; the extrusion plates at the two sides of the gate plate are tightly attached to the gate plate to prevent the liquid in the pipeline of the valve body from flowing out; the gate plate moves upwards by rotating the hand wheel, so that liquid can flow through the pipeline; and the gate plate moves upwards to extrude the liquid bag, so that the part, in contact with the extrusion plates, of the lower end of the liquid bag expands and deforms, the extrusion plates are always attached to the two sides of the gate plate, it is guaranteed that the liquid cannot flow into the upper portion of the valve body from the pipeline of the valve body, the sealing performance of the extrusion plates is guaranteed when the gate plate moves, and the sealing effect of the device is better.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to an automatic compensation type industrial gate valve. Background technique [0002] The industrial gate valve is an opening and closing gate. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. Industrial gate valves are an important accessory for controlling the flow of media on industrial pipelines. They can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. [0003] Most of the existing industrial gate valves only realize the function of controlling the flow of liquid, but do not solve the sealing problem of each part in the gate valve; the gate valve needs to control the flow of liquid, and the gate valve must have good sealing performance, not only ...

AI Technical Summary

Problems solved by technology

The invention is mainly used to solve the problem that the gate valve in the prior art cannot always maintain a good seal during the movement of the gate, that is, it is used to solve the problem that the liquid in the valve body may flow out of the gate valve when the gate is working

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