RU2770306C1 - Gas pressure reducer - Google Patents

Abstract

FIELD: controlling.

SUBSTANCE: invention relates to the field of automatic adjustment, namely to apparatuses for adjusting the gas pressure, and can be used in various fields of industry, medicine and agriculture. The gas pressure reducer comprises: a body (1) with a built-in seat (2) made of fluoroplast or another suitable material, an inlet fitting (17), an outlet fitting (18), a tuning part including a tuning screw (3), a spring (4), a membrane (5), end stops (6) and (8), a socket (7) and a reducing unit including a rod (9) with an end stop (10), a spring (11), a valve (12), wherein a channel (13) is provided, connecting the working cavity (14) of the reducer with the cavity (19) of the balancing chamber, a balancing chamber (15) with a sealing ring (16) installed therein, is characterised by the fact that the balancing chamber is pressed against the body of the reducer by the pressure of the gas entering the reducer, and the spring of the reducing valve is removed into the membrane installation area.

EFFECT: reduction in the size and weight of the reducer with the maintained flow characteristic of the reducer and other working parameters.

1 cl, 1 dwg

Description

The invention relates to the field of automatic control, namely to gas pressure control devices, and can be used in various fields of industry, medicine and agriculture.

Known gas reducer containing a housing with a seat and a cover, a tuning part, including a tuning screw, a spring, a membrane with a support plate and a pusher, a reducing valve consisting of a housing with a through channel and a seal, a balancing chamber communicating with the working pressure cavity and equipped with a control valve [1].

The disadvantage of this reducer is that with a sharp supply of gas to the inlet fitting, the reducing valve spontaneously opens, which leads to a sharp increase in gas pressure in the working cavity of the reducer even when the reducing valve is initially closed.

A gas reducer is known, containing a housing with a seat, a tuning part consisting of pushers, a membrane, a tuning screw and a tuning spring, a reducing valve, including a housing, a seal in which a balancing chamber, a piston and a spring are made [2].

The disadvantage of this gearbox is the complex device of the reducing valve and the need to build additional pushers into the body, which complicate the layout of the gearbox, and the spring pressing the valve increases the dimensions of the gearbox.

The objective of the invention is to create a balanced reducer with increased gas flow, with small housing dimensions without compromising performance.

The problem is solved by the fact that in a gas reducer containing a body with a built-in seat made of fluoroplastic or other suitable material, a tuning part, including a tuning screw, a spring, a membrane, end stops, a glass and a reducing unit, including a rod with an end stop, a spring, a reducing valve , in which there is a channel connecting the working cavity of the gearbox with the cavity of the balancing chamber, the balancing chamber with the sealing ring installed in it, the spring of the reducing valve is moved to the membrane installation area, and the balancing chamber is pressed against the gearbox housing by the pressure of the gas entering the gearbox.

When using the invention, a technical result can be obtained, which is expressed in reducing the dimensions and weight of the gearbox while maintaining the flow characteristics of the gearbox and other operating parameters.

The essence of the invention is illustrated by the drawing shown in Fig. 1, which shows a gas reducer.

The gas reducer contains: a body (1) with a built-in seat (2) made of PTFE or other suitable material, an inlet fitting (17), an outlet fitting (18), a tuning part, including a tuning screw (3), a spring (4), a membrane ( 5), end stops (6) and (8), cup (7) and reducing unit, including rod (9) with end stop (10), spring (11), valve (12), which has a channel (13) connecting the working cavity (14) of the gearbox with the cavity (19) of the balancing chamber, the balancing chamber (15) with the sealing ring (16) installed in it, differs in that the balancing chamber is pressed against the gearbox housing by the pressure of the gas entering the gearbox, and the spring the reducing valve is placed in the membrane installation area.

The gas reducer works as follows.

In the initial position, the adjusting screw (3) is turned out, the spring (4) is in a free state, the valve (12) is in the closed position, pressed by the spring (11) to the seat (2), when gas is supplied to the inlet fitting (17), the balancing chamber (15) is pressed against the body (1) by gas pressure, while the sealing ring (16) prevents the penetration of gas into the cavity (19) of the balancing chamber, and the valve (12) limits the outflow of gas into the working cavity (14), when tightening the screw (3 ) the screw presses on the end stop (8) and compresses the spring (4), the force of the compressed spring through the end stop (6) is transmitted to the membrane (5) and the rod (9) with the end stop (10) installed on it, while the spring ( 11) is compressed and the valve (12) opens, forming a gap between the seat (2) and the valve (12), through the gap the gas flows into the working cavity (14) and through the gap between the rod (9) and the body (1) into the submembrane cavity, at the same time, the pressure of the gas acting on the membrane (5) and end stop (6) increases until the force from the gas pressure will not be equal to the force from the action of the spring (4), when the gas flows out of the working cavity through the outlet fitting (18), the gap between the seat (2) and the valve (12) due to the equality of forces acting on the membrane (5) and the end stop (6) on the side of the spring (4) and the gas pressure in the sub-membrane cavity is maintained in such a way as to ensure that the gas inflow into the working cavity is equal to the outflow of gas through the outlet fitting, while the working cavity (14) is connected to the cavity of the balancing chamber (19) channel (13), ensuring the equality of pressures acting on the valve (12) from both sides, thus eliminating the effect on the valve (12) of the pressure of the gas entering the reducer, and as a result, eliminating the effect of changing the pressure of the gas supplied to the reducer, which provides a more uniform gas pressure in the working cavity during the operation of the gas reducer.

Information sources

1. Gas reducer // Patent of Russia No. 2290682 12/27/2006 Bull. №36 / Suvorov B.C.

2. Gas reducer // Useful model No. 6034 02/16/1998 / Suvorov V.S.

Claims (1)

A gas reducer containing a body with a built-in seat made of fluoroplastic or other suitable material, an inlet fitting, an outlet fitting, a tuning part, including a tuning screw, a spring, a membrane, end stops, a cup and a reducing unit, including a rod with an end stop, a spring, a valve, in which there is a channel connecting the working cavity of the gearbox with the cavity of the balancing chamber, the balancing chamber with a sealing ring installed in it, characterized in that the balancing chamber is pressed against the gearbox housing by the pressure of the gas entering the gearbox, and the spring of the reducing valve is placed in the membrane installation area.

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