SU1725199A1 - Device for pressure regulating - Google Patents

Abstract

This invention relates to pneumatic automation. The purpose of the invention is to reduce the technological field of the output pressure deviations. The device for regulating the pressure contains the main pressure regulator 1, the auxiliary pressure regulator 2, the safety valve 3. The main regulator 1 includes the first body 4, the sensing element - the piston 5, the output 6 and the control 7 cavity, levers

Description

8 and 9, the plunger 10, the regulator — the valve 11 and the seat 12. The valve device 13 comprises a second body 14, a piston 15, a valve 16, a first 17 and a second chamber 18, a saddle 19, a channel 20, a spring 21. The device

also contains a check valve consisting of valve 22, seat 23 and spring 24, valve 25, seat 26, spring 27, channel 28, inlet line, input cavity 29, spring 31, fitting 32, channel 33. 1 silt,

The invention relates to pneumatic automation and can be used in gas supply systems.

A wide-limit pressure regulator is known, consisting of a housing with inlet and outlet cavities, between which a regulating member is installed, which is connected to the sensing element through a pair of valve-saddle drops excess pressure from the outlet cavity.

Also known is a gearbox, automatic self-unloading, consisting of a main regulator and a low-flow auxiliary, containing a drainage pair and issuing pressure and controlling the cavity of the main regulator, which also has a drainage pair providing a certain technological field of output pressure deviations. The technological field is characterized by increased positive deviations, which exclude the emergency operation of the safety valve on the output line, but which allows the unit to continue to work in some way or to analyze the reasons for the increase in pressure, decide whether it can work or automatically switch to the standby unit.

A gas reducer (prototype) is known, which contains a main pressure regulator, which includes a regulator installed in the first case between the inlet and outlet cavities, kinematically connected with the sensing element, which forms the control and outlet cavities with the first case, and includes in the second case, a spring-loaded piston dividing the second body into the first and second chambers and connected with a valve installed between the reset and the first chamber connected to the control cavity,

moreover, in the piston between the first and second chambers, a first check valve is installed with an inlet to the second chamber, connected via an auxiliary pressure regulator to an inlet line connected to the input cavity of the main pressure regulator. The piston connected to the drainage pair installed in the second housing ensures the pressure stability in the control cavity when the volume changes. This improves pressure control accuracy.

However, in case of leakage, destruction of the valve or the seat of the regulator, the technological field of deviations of the gearbox can be limited only

0 triggered safety valve on the output line. The tolerance for setting and tripping a safety valve can sometimes be too large to limit the required process floor.

The purpose of the invention is to reduce the technological field of the output pressure deviations, which will expand the applicability and technological capabilities

0 units

The goal is achieved by the fact that between the outlet and control cavities of the main pressure regulator there is a second check valve to the outlet cavity.

5 The drawing shows a device for pressure control,

The device contains a main regulator 1, an auxiliary regulator 2, the output of which is protected by a safety valve 3. The main regulator 1 consists of the first body 4, which forms an output 6 with a sensitive element - a piston 5 - output 6 and controls 7 cavities, the piston 5 through levers 8 and 9 and the pusher 10 is connected to

5 by a regulator — a valve 11 with a saddle 12. The valve device 13 comprises a second body 14 and a piston 15 connected to the valve 16 and dividing the second body 14 into the first 17 and second 18 chambers. On

0, the piston 15 in the direction of the seat 19, installed in front of the channel 20, acts on the spring 21. In the piston 15, a first check valve is installed, consisting of a valve 22, pressed against the seat 23 by a spring

24. The valve 25, with its spring pressed against the seat 26 by the spring 27, constitutes the second check valve. Channel 28 communicates control space 7 with the first chamber 17.

The input line is communicated with the input cavity 29 of the main regulator 1 and

through the auxiliary controller 2 and the channel 30 with the second chamber 18. The spring 31 acts on the valve 11. The fitting 32 communicates with the consumer. Channel 33 is the outlet channel of the second check valve.

Claims (1)

Claims An apparatus for regulating a pressure, comprising a main pressure regulator comprising a regulator mounted in the first case between the inlet and outlet cavities, kinematically connected with a sensing element forming a control and outlet cavity with the first case, a valve device including the second case is spring loaded 0 five a piston dividing the second body into the first and second chambers and associated with a valve installed between the vent and the first chamber connected to the control cavity, with the first non-return valve having an input to the second cavity in the piston between the first and second chambers connected through an auxiliary a pressure regulator with an input line connected to the input cavity of the main pressure regulator, characterized in that, in order to reduce the technological field of the output pressure deviations, between the output and control the cavities of the main pressure regulator are installed by the inlet to the outlet cavity of the second check valve.