RU206549U1 - Axial pressure regulator amplifier - Google Patents

Abstract

The utility model relates to the field of control valves for gas pipelines and concerns an integral part of a gas pressure regulator - an amplifier. The task of the utility model is to improve the quality of gas pressure regulation. The problem is solved due to the fact that in the amplifier of an axial pressure regulator containing a body, a cover with a pulse feed connection gas, a monovalve with a return spring, the saddle is stationary, the saddle is movable, the measuring piston with the rod, the command pressure cavity communicated with the command pressure channel, the feedback pressure cavity, the master spring, a spring safety valve is installed in the body, the input of which communicates with the cavity with the installed the driving spring, and the output is with the environment.

Description

The utility model relates to the field of control valves for gas pipelines and concerns an integral part of a gas pressure regulator - an amplifier.

Known is a coupled regulator-amplifier containing two cylindrical bodies with cavities of inlet, command and outlet pressure, a piston valve, a piston-rod, a double valve, a saddle, a pressure device (RF patent for utility model No. 147597, IPC G05D 16/00, publ . 11/10/2014).

The disadvantage of this device is the low quality of regulation with significant differences in ambient temperatures, due to the influence on the magnitude of the force acting on the measuring piston, the pressure in the cavity with the installed pressure device.

Known amplifier for the gas pressure regulator (RF patent for invention No. 2681513, IPC G05D 16/10, publ. 03/06/2019 Bull. No. 7), which contains a housing, a cover with a pulse gas supply connection, a monovalve with a return spring, a fixed saddle, a saddle movable, measuring piston with a rod, command pressure cavity communicated with the command pressure channel, feedback pressure cavity, setting spring. The measuring piston rod is movable relative to the measuring piston with a step for contact with this piston and is equipped with an additional feedback piston located in a bushing coaxially located in the amplifier housing. The additional piston and bushing form a cavity communicated through radial and axial bores in the movable rod either with the command pressure cavity through the central drilling in the monovalve, or with the feedback pressure cavity through the slotted gap between the monovalve and the movable seat made in the movable rod and having a flat shape ... The rod is loaded by the master spring through the additional piston and the ball. The monovalve, in addition to the central drilling, has two radially spaced holes: the first for communication with the command pressure cavity and the second through the groove on the monovalve with the cavity for supplying impulse gas through the gap between the fixed seat and the left end of the monovalve, the right flat end of which is in contact with the movable seat.

The disadvantage of this device is the low quality of regulation with significant differences in ambient temperatures, which lead to a change in the pressure in the cavity with the installed master spring, which affects the position of the measuring piston.

The task of the utility model is to improve the quality of gas pressure regulation.

The problem is solved due to the fact that in an axial pressure regulator amplifier containing a body, a cover with a pulse gas supply connection, a monovalve with a return spring, a stationary seat, a movable seat, a measuring piston with a rod, a command pressure cavity communicated with the command pressure channel, the feedback pressure cavity, the master spring, a spring safety valve is installed in the body, the inlet of which communicates with the cavity with the set master spring, and the outlet communicates with the environment.

The essence of the described utility model is illustrated by the following drawings.

FIG. 1 - section of the amplifier of the axial pressure regulator.

The amplifier of the axial pressure regulator contains a housing 1, a setting spring 2, a valve body 3, a valve piston 4, a flared sleeve 5, a package of spring washers 6. The rest of the components of the device do not differ from the known ones.

The device works as follows.

Before starting operation, the valve body 3 is installed in a through hole made in the body 1 and communicating with the cavity of the master spring 2. The characteristics of the package of spring washers 6 are selected based on the operating conditions of the device and limit the maximum pressure in the cavity. The pressure in the cavity of the installation of the spring of the master 2 acts on the valve piston 4 and through it on the package of spring washers 6. If this effect causes an excess of the force applied to the package of spring washers 6 from the side of the valve piston 4 over the compression force of the package of spring washers 6, then clearance in the mating valve piston 4 - flared sleeve 5. Through the resulting gap, part of the working medium is vented into the environment, and the pressure in the cavity of the setting of the setting spring 2 is reduced to the nominal value. The rest of the operating algorithms of the device do not differ from the known ones.

Claims (1)

An axial pressure regulator amplifier containing a body, a cover with a pulse gas supply connection, a monovalve with a return spring, a fixed seat, a movable seat, a measuring piston with a rod, a command pressure cavity communicated with a command pressure channel, a feedback pressure cavity, a setting spring, which is different the fact that a spring-loaded safety valve is installed in the body, the inlet of which communicates with the cavity with the installed master spring, and the outlet with the environment.

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