A pressure differential plunger automatic pressure regulating valve

Abstract

The invention discloses a differential pressure plunger automatic pressure regulating valve. The differential pressure plunger automatic pressure regulating valve comprises a valve body, a medium channel and a plunger. An upper cavity is arranged in the position, on the upper portion of the plunger, of the valve body; an upper membrane is arranged in the upper cavity and divides the upper cavity into a first upper cavity located on the upper portion of the upper membrane and a second upper cavity located on the lower portion of the upper membrane; the lower surface of the upper membrane is fixedly connected with the upper end face of the plunger; the upper surface of the upper membrane is fixedly connected with an elastic component; the other end of the elastic component is connected with a pressure regulating bolt capable of rotating relatively; a first connection channel for communicating the first upper cavity with the medium channel at the outlet end is arranged between the first upper cavity and the medium channel at the outlet end; a second connection channel for communicating the second upper cavity with the medium channel at the inlet end is arranged between the second upper cavity and the medium channel at the inlet end. The differential pressure plunger automatic pressure regulating valve is of the upper-and-lower-stage outlet end pressure feedback response design, response is more sensitive, and control is more accurate.

Description

technical field [0001] The invention belongs to the technical field of pressure regulating valves, in particular to an automatic pressure regulating valve with a differential pressure plunger. Background technique [0002] The pressure regulating valve is used in various water supply systems, heating systems, fire protection systems, etc., to clamp the pressure of the fluid medium at a certain threshold to ensure pressure balance and safe use. The general pressure regulating valve is mostly a throttle valve, and the flow adjustment is realized by manually adjusting the pore size of the flow channel, so as to realize the pressure adjustment. Obviously, this method cannot realize the automatic adjustment of the pressure, and the reliability is not high. The other is the pressure reducing valve type pressure regulating valve, which mainly detects the pressure through the diaphragm. When the pressure is too high, the diaphragm moves upward, driving the valve core to adjust the s...

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Problems solved by technology

However, this kind of pressure regulating valve is mainly used for the circulation of gas medium, and it is not completely suitable for liquid medium. Moreover, this kind of pressure reducing valve type pressure regulating valve has low adjustment accuracy, and can only decompress high-pressure fluid medium. single

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