Constant micro-resistance self-sealing check valve

Abstract

Constant micro-resistance self-sealing check valve, including a rotatable main shaft and a main shaft sleeve outside the main shaft, and an arc-shaped tube fixedly installed on the main shaft sleeve, the other of the arc-shaped tube One end of the valve plate is connected to a valve plate by the micro-rotating shaft of the valve plate, and a valve plate vertical weight is installed at the end of the valve plate farthest from the main rotating shaft, so that the valve plate is always in a vertical state when there is no external force The axis is vertical, and a set of valve plate balancing device is installed on the other side of the arc tube outside the main shaft sleeve. The valve plate balancing device includes a main counterweight, a slanted slide plate and an auxiliary counterweight installed on the slanted slide plate; The feature is that one end of the arc tube is fixed on the outside of the main shaft sleeve, and the other end of the arc tube is connected with the valve plate by the valve plate micro-rotation shaft, so that the valve plate surface can rotate clockwise or counterclockwise with the valve plate micro-rotation shaft as the axis. The hour hand deflects by a small angle.

Description

technical field [0001] The invention relates to a constant micro-resistance self-sealing check valve, which is suitable for all liquid and gas media, and belongs to the technical field of comprehensive energy saving and emission reduction and the technical field of check valves. Background technique [0002] Check valves are common valves used to prevent backflow of liquid or gas in many pipeline transportation processes; however, the check valves on the market are always opened by liquid or gas pressure, and the impact pressure of flowing liquid or gas is always needed Keeping the check valve plate open consumes considerable energy and pressure drop; although some check valve plates are now very thin and light, the pressure drop when liquid or gas flows through the valve is small and consumes energy. Low, but because the valve plate of this check valve is too thin and light, the sealing performance of the valve plate is poor when there is no inlet liquid or gas pressure, an...

AI Technical Summary

Problems solved by technology

[0002] Check valves are common valves used to prevent backflow of liquid or gas in many pipeline transportation processes; however, the check valves on the market are always opened by liquid or gas pressure, and the impact pressure of flowing liquid or gas is always needed Keeping the check valve plate open consumes considerable energy and pressure drop; although some check valve plates are now very thin and light, the pressure drop when liquid or gas flows through the valve is small and consumes energy. Low, but because the valve plate of this check valve is too thin and light, the sealing performance of the valve plate is poor when there is no inlet liquid or gas pressure, and some of them cannot play the role of check; only Wei Boqing is currently on the market The invention patents "201410059609.6 Internal Adjustment Constant Micro-resistance Check Valve" and "201410044392.1: Self-adjusting Constant Micro-resistance Check Valve" can open the valve plate, the check valve has only a small valve plate resistance or no valve plate resistance, However, this kind of check valve requires high precision for the vertical distance between the center point of the valve plate rotating shaft and the sealing surface of the valve plate, and requires a high degree of verticality between the sealing surface of the valve plate and the central axis of the valve inlet flange and the valve outlet flange. Higher, which brings a certain degree of difficulty to the processing of the check valve. The present invention is designed to overcome these shortcomings, so that the valve plate can rotate at a small angle around the micro-rotation axis of the valve plate, thereby greatly reducing the impact on the valve plate rotation axis. The vertical distance accuracy requirements between the center point of the valve plate and the sealing surface of the valve plate, and the verticality requirements for the sealing surface of the valve plate and the central axis of the valve inlet flange and the valve outlet flange

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