Gas pressure regulator and gas pressure regulation method

Abstract

The invention belongs to a static pressure measurement calibration instrument, and in particular relates to a gas pressure regulator which is designed by a new principle, and a gas pressure regulation method. The gas pressure regulator comprises a regulator main body, a transmission part, a piston assembly, a combination valve and a sealing piece. In the invention, mass regulation and capacity regulation are combined with each other, and the advantages of a mass gas pressure regulation method and a capacity gas pressure regulation method are combined together, so that higher control speed andhigher control accuracy can be realized by pressure regulation from a low range to a high range. The method comprises the following steps of: coarsely regulating a target pressure value in a mass gaspressure regulation mode and finely regulating the target pressure value in a capacity gas pressure regulation mode, namely increasing or reducing the mass of gas simultaneously for a front cavity and a rear cavity of the pressure regulator through the combination valve so as to make the target pressure value of the regulator coarsely realized; and driving a piston on a nut actuator to move back and forth in a main body cavity through a levorotatory guide screw rod and finely regulating to acquire the target pressure value.

Description

technical field [0001] The invention belongs to a static pressure measuring and calibrating instrument, in particular to a gas pressure regulator designed by applying a new principle and an adjusting method thereof. technical background [0002] At present, there are mainly two types of pressure measurement and calibration instruments widely used: piston pressure gauge and pressure controller. [0003] The piston pressure gauge is developed on the basis of the principle of hydrostatic balance and Pascal's law. It has outstanding advantages such as high accuracy and good long-term stability. Almost all high-level calibration laboratories in the world use piston pressure gauges as the basis. Pressure measurement reference instrument. However, due to the principle and structure of the piston pressure gauge, it has the disadvantages of high labor intensity, low work efficiency, poor portability, and can only produce discrete pressure points, so it is only suitable as a measurem...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problems that the quality gas pressure adjustment method is difficult to control in fine adjustment and is greatly affected by temperature, the capacity gas pressure adjustment method needs too much mechanical energy and high dynamic sealing requirements when adjusting large-range pressure, and provides a control Mass-capacity combined gas pressure regulator with high speed and high control accuracy and its regulating method

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