Novel valve core mechanism based on gate valve

Abstract

The invention relates to the technical field of pipeline valves, and discloses a novel valve core mechanism based on a gate valve, which comprises a valve body, wherein the middle part of the upper surface of the valve body is fixedly connected with a support frame, the upper surface of the support frame is movably connected with a hand wheel, the middle part of the hand wheel movably sleeves a valve rod, and the inner cavity of the valve body is provided with a valve cavity. The hand wheel is rotated to enable the valve rod to drive a gate plate to move downwards, after the gate plate moves downwards for a certain distance, the lower end of the valve rod presses a movable block, a fluid material, positioned at the lower end of the movable block, in the connecting pipe is pressed to the joint of a sealing sleeve and a sealing pipe, the sealing pipe is pushed by the fluid material to move towards the gate plate, and when the circle center of the gate plate and the circle center of a feeding port are located on the same horizontal plane, the sealing pipe makes contact with the gate plate. The feeding port is sealed by a sealing ring of the sealing pipe, so that the sealing performance when the gate valve is fully closed is guaranteed, the problem that the gate plate is abraded when a traditional gate valve is opened and closed is solved, and the service life of the gate valve isprolonged.

Description

technical field [0001] The invention relates to the technical field of pipeline valves, in particular to a novel valve core mechanism based on gate valves. Background technique [0002] Gate valve is a device used for opening and closing of pipelines. Gate valves only have two states of fully open and fully closed, and cannot be used for adjustment and throttling of pipelines. Traditional gate valves are sealed by contacting the valve seat with the gate plate. Usually, the sealing surface will be surfacing. Metal materials are used to increase the wear resistance of the gate. There are two types of gate, rigid gate and elastic gate. According to the difference of the gate, the gate valve is divided into two types: rigid gate valve and elastic gate valve. It is a rising stem gate valve and a dark stem gate valve. [0003] By turning the handwheel of the traditional gate valve, the valve stem drives the gate plate to move up and down, so that the gate valve enters two states ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the use of the existing gate valve proposed in the background technology, the present invention provides a new valve core mechanism based on the gate valve, which has the advantages of high sealing performance and no jamming, and solves the problems raised in the above background technology. The problem

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