Internally-adjusted constant-micro-resistance check valve

Abstract

The invention discloses an internally-adjusted constant-micro-resistance check valve. The check valve comprises a valve plate which is arranged in a valve body in a connecting manner through a valve plate revolving shaft and a valve plate connecting block and can be sealed together with a sealing ring at the inlet of the valve plate and rotationally opened and closed in the valve body, and a valve plate counterweight device connected with one side, which is far away from the valve plate, of the valve plate connecting block, wherein the valve plate revolving shaft is arranged in the center of a valve plate connecting block between the valve plate counterweight device and the valve plate. The check valve is characterized in that the valve plate counterweight device of the horizontally-arranged check valve has five types of structures, namely, a structure A in which the section of the vertical valve plate surface of the valve plate counterweight device is in the form of an asymmetric sector, a structure B in which the valve plate counterweight device consists of a main balance block and a secondary balance block, a structure C in which the valve plate counterweight device consists of an arc-shaped slipway and a gravity block, a structure D in which the section of the vertical valve plate surface of the valve plate counterweight device is in the form of a banana arc, and a structure E in which the valve plate counterweight device consists of a fixed balance block and a movable balance block.

Description

technical field [0001] The invention relates to an internal adjustment type constant micro-resistance 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...

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 "201210054615.3 Energy-saving micro-resistance adjustable self-balancing check valve" and "201120251731.5 check valve" can no longer consume pressure drop to keep the valve plate open after opening the valve plate, but these check valves also have a disadvantage, That is, the valve plate of the check valve must be almost completely opened before it can achieve no resistance or slight resistance. The function of resistance, the five structures of the present invention and the three structures of Wei Boqing's "201410044392.1 Self-adjusting Constant Micro-resistance Check Valve" overcome this shortcoming. In any opening or state of the check valve, there is only a small Disc resistance or no disc resistance

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