RU1833850C - Method and device for control gas pressure - Google Patents

Abstract

The invention relates to automatic control and can be used to maintain the required value of a reduced gas pressure with the required accuracy. The purpose of the invention is to simplify, increase the reliability and accuracy of the method of regulating the gas pressure and device for its implementation. The method includes changing the gas flow rate depending on the movement of the thermosensitive membrane, which is heated by exposing the membrane to radiation, which is passed through a wall of optical material with through porosity, the wall being wetted with liquid. A device that implements the indicated method comprises a housing 1, between the input 2 and output 3 cavities of which a regulatory body is mounted in the form of a wall 4 (for example, a lens) of optical material with through porosity with the possibility of wetting the wall with liquid, and between the output 3 and additional 6 a thermally sensitive membrane 5 is installed in the cavities, as well as a radiation source 7 installed in front of the transparent window 8 of the housing 1. The inlet and outlet cavities are provided with inlet 9 and outlet 11 nozzles, respectively. 2 sec and. 1 s P. f-ly, 1 ill.

Description

The invention relates to automatic pressure control, in particular, to regulators for reducing the gas pressure to a predetermined one and stabilizing this pressure.

The purpose of the invention is to simplify, improve the accuracy and reliability of the method and device.

A device for adjusting by the indicated method is shown in the drawing. The device comprises a housing 1, between the input 2 and output 3 cavities of which a regulating body 4 with through porosity is installed and which is the wall between the cavities 2 and 3. The heat-sensitive membrane 5 is the wall between the output

cavity 3 and additional cavity 6. The radiation source 7 is installed opposite the transparent window 8 of the housing 1. The inlet cavity 2 is provided with an inlet pipe 9 and is partially filled with liquid 10 that moistens the wall 4. The outlet cavity 3 is provided with an outlet pipe 11. The membrane 5 is provided with a diaphragm 12. B In an embodiment of the device, wall 4 is made in the form of a lens, on the optical axis of which there is a radiation source 7 and a heat-sensitive membrane 5.

The device according to the proposed method works as follows.

When you turn on the source 7, the radiation through the transparent wall 4 is heated meme00

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brane 5 and it bends to the left to the maximum possible state.

When the fluid 10 is supplied into the cavity 2, the fluid 10 enters the pores of the wall 4 as through a wick. The transparency of the wall 4 decreases, the radiation flux falling from the source 7 to the membrane 5 decreases. The membrane 5 is somewhat cooled and bends to the right from the extreme left position.

When high pressure is applied through the nozzle 9, the liquid 10 is expelled from the pores of the wall 4, its optical transparency increases, the membrane 5 begins to heat up again and bends to the left. The gas passes into the cavity 3. If the nozzle 11 is closed, then at a certain tuning pressure, determined by the pressure of the gas passing through the wall 4 and the pressure of the membrane 5, the dynamic equilibrium of the pressures in the cavities 2 and 3 is established. The pores of the wall 4 begin to fill again with liquid and the gas tightness of the wall is restored. The equilibrium state corresponds to a certain minimum deflection of the membrane 5 to the left, determined by its minimum heating from the minimum radiation flux transmitted by the wall 4 filled with liquid 10.

When gas is taken into the volume behind the regulator, the outlet pressure in the cavity 5 and its force acting on the wall 4 decreases, which leads to throttling of the gas through the pores of the wall 4. The processes are repeated.

Claims (3)

1. A method of controlling gas pressure, including a change in gas flow depending on the movement of the heat-sensitive membrane, which is heated radiation, characterized in that, in order to simplify, improve the accuracy and reliability of the method, the radiation is passed through a wall of optical material with through porosity, and the wall wetted with liquid. 2. Device for regulating gas pressure, comprising a housing, between the inlet and outlet cavities of which a regulatory body is installed, and between the output and additional cavities contain a heat-sensitive membrane, as well as a source of radiation directed to this membrane, characterized in that, in order to simplify, increase the accuracy and reliability of the device, the regulatory body is made in the form of a wall of optical material with through porosity with the possibility of wetting the wall liquid, and the wall is located between the radiation source and the heat-sensitive membrane. 3. The device according to claim 2, with the proviso that the wall has the shape of a lens, the radiation source and the heat-sensitive membrane being located on the optical axis of the lens.