SU900266A1 - Gas pressure regulator - Google Patents

Description

I

The invention relates to the valve industry and can be used as a gas (liquid) pressure reducer in pneumatic-hydraulic systems, where it is necessary to maintain a constant pressure at low costs.

Pressure reducers are known that contain a sensing element located in the outlet cavity, connected by a rod to a reducing member located in the inlet cavity, the input cavity being formed by the walls of the cylindrical body, and the reducer seat is made along the axis of the cylinder 1.

The disadvantage of such gearboxes is their unsuitability to ensure stable operation at low flow rates, comparable to the micro leakage of a hermetic container.

The purpose of the invention is to expand the functionality by ensuring the stable operation of the reduction gear at small gas flow rates,

The goal is achieved by the fact that at the end of the rod there is an annular shoulder 5 and the reducing member is made in the form of successively installed between the shoulder and the saddle and covering the stem of toroidal elastic rings, the outer diameter of which is equal to the inner diameter of the cylindrical body.

The drawing schematically shows a gearbox, a slit.

The reducer contains a sensitive element, such as a bellows 1, placed on the exit cavity and connected by a rod 2 to a reducing member located in the entrance cavity formed by the walls of the cylindrical body 3. The saddle k is formed along the axis of the cylinder. At the end of the rod is made an annular shoulder 5. The reducing body is made in the form of successively installed between the collar 5 and the saddle

and covering the stem 2 of the toroidal elastic rings 6, the outer diameter of which is equal to the inner diameter of the housing 3. The output cavity is connected to a sealed container 7 In operation, pressed by the expanded bellows 1 and collar 5 of the stem 2 to the polished surfaces of the housing 3 and the stem 2, rings 6 form with them labyrinth seals, the tightness of which is determined by the magnitude of the force with which the gas in the inflatable hermetic tank 7 acts on the bellows 1. This value varies depending on the pressure in the outlet cavity. In this case, the contact pressure in the sealing pairs formed by the elastically deformable rings and the polished surfaces of the casing 3 and the rod 2 also changes, and consequently, the micro expenditure also changes through these seals. If the gas pressure in the tank 7 decreases due to the gas flow through the micropores and microcracks, the gas pressure in the cavity of the bellows 1 will also fall and he, compressing, will move the rod 2, the gas flow in the cavity of the bellows 1 will increase through the labyrinth seals. The bellows 1 is expanded again and the collar 5 of the stem 2, the elastic rings 6 will be compressed again, and the gas consumption in the tank 7 will stop.

The proposed device allows for the operation of the pressure reducer at low gas flow rates comparable to a micro leakage in an airtight container.

Claims (1)

Invention Formula A gas pressure reducer containing a sensitive element in the outlet cavity connected by a rod c. reducing body located in the input cavity, and The entrance cavity is formed by the walls of the cylindrical body, and the reducer seat is made along the axis of the cylinder, characterized in that, in order to expand its functionality, an annular shoulder is made at the end of the stem, and the reducing member is made as successively installed between the shoulder and saddle and the surrounding toroidal stem elastic rings, the outer diameter of which is equal to the inner diameter of the cylindrical body. Sources of information taken into account in the examination 1. Basta TM Engineering hydraulics. M., Mechanical Engineering, 1971, p. 391. rice, 228.