Self-adjusting constant-micro-resistance check valve

Abstract

The invention discloses a self-adjusting constant-micro-resistance check valve. The self-adjusting constant-micro-resistance check valve comprises a valve element plate, a valve element plate balance weight support, an upper balancing weight, a lower balancing weight, an inter-balancing-weight rotary shaft, a straight moving rail and an arc-shaped toothed rail, wherein the valve element plate is installed in a valve cavity through a rotary shaft and capable of in sealing with a valve inlet seal ring and can be opened and closed through rotation in the body of the valve cavity, the valve element plate balance weight support is connected with the end, provided with the rotary shaft, of the valve element plate, the upper balancing weight and the lower balancing weight are installed on the valve element plate balance weight support, the inter-balancing-weight rotary shaft is installed between the upper balancing weight and the lower balancing weight, the straight moving rail is installed on the lower side face of the upper balancing weight and is meshed with central teeth of the inter-balancing-weight rotary shaft, and the arc-shaped toothed rail is connected with end teeth of the inter-balancing-weight rotary shaft in a meshed mode. The self-adjusting constant-micro-resistance check valve is characterized in that an obtuse angle which is larger than 90 degrees is formed between the valve element plate balance weight support and the valve element plate when the check valve is installed horizontally, and an acute angle which is smaller than 90 degrees is formed between the valve element plate balance weight support and the valve element plate when the check valve is installed vertically; a valve element plate balance weight device is formed by the valve element plate balance weight support, the balancing weights installed on the valve element plate balance weight support, and a device which makes micro resistance be kept by the balancing weights when the valve element plate is opened by any degrees.

Description

technical field [0001] The invention relates to a self-adjusting 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 pressure,...

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 is small and energy-consuming when the liquid or gas flows through the valve. 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 to achieve no resistance or slight resistance. The function of resistance, the present invention overcomes this shortcoming. In any opening or state of the check valve, the check valve of the present invention has only a small valve plate resistance or no valve plate resistance, and three ways of realization are designed.

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