RU198155U1 - GAS PRESSURE REGULATOR - Google Patents

Abstract

The utility model relates to devices for regulating gas pressure and can be used in gas and other industries. The claimed gas pressure regulator contains an actuator with an elastic shutter, a saddle in the form of grates with a throttling grooves, an input, output and control chambers, a distributor with a filter and an adjustable throttle, a differential gear with a spring-loaded piston valve and a saddle, an amplifier with a control valve, a saddle, and a membrane the unit and the tuning mechanism, while the amplifier is made in the form of a housing with a filter and a throttle, a spring-loaded piston valve and a seat, a control valve with a seat, a membrane unit and a tuning mechanism, while their interaction with each other, the actuator, as well as the input and output pipelines produced using channels made in the amplifier housing. The technical task of the proposed utility model is to increase the accuracy and reliability of the gas pressure regulator, as well as simplifying its design. 2 ill.

Description

The utility model relates to devices for regulating gas pressure and can be used in gas and other industries.

Known gas pressure regulators of indirect action with a control device in which the change in the flow area occurs due to changes in the deflection of the elastic (elastic) diaphragm (shutter) under the action of control pressure. Including:

- gas pressure regulator “Axial Flow Vales” (American Meter prospectus, website - www.elster-americanmeter.com). This design contains an actuator with a shutter and a seat, an input, output and control chambers, a distributor with a filter and an adjustable throttle, as well as a control device.

The main disadvantage of this regulator is the instability of maintaining the outlet pressure with a significant fluctuation in the inlet pressure, and, consequently, the insufficiently high reliability.

- gas pressure regulator according to patent RU No. 2239862, IPC G05D 16/06, publ. 11/10/2004, bull. No. 31, comprising an actuator with a shutter, a saddle, an input, output and control chambers, a throttle valve, a pilot with a control valve, a membrane unit and a tuning mechanism, the input chamber of the actuator being connected via a throttle to the control chamber and the pilot, and the pilot is connected to the output an actuator chamber, characterized in that a backup channel with a pneumatically controlled shut-off device of a normally closed type is inserted into it between the input and control chambers of the actuator, and an emergency valve is installed in the pilot, which interacts with a pneumatically controlled shut-off device of a normally closed type.

The main disadvantages of such a regulator are the complexity of the design, as well as the low accuracy due to the availability of a backup channel and an emergency valve.

The closest in technical essence to the claimed solution is the gas pressure regulator LLC “SGPA” LLC - RDE 100 (Installation, commissioning, operation and maintenance manual for AYAD 2.573.069 RE, website: www.sgpa.ru). Its main difference from the above regulators is the presence of a differential gearbox, which reduces the instability of maintaining the outlet pressure with a significant fluctuation in the inlet pressure.

The RDE 100 regulator contains: an actuator with an elastic shutter, a saddle in the form of grates, an input, output and control chambers; amplifier with control valve, seat, diaphragm block and tuning mechanism; differential gear with spring-loaded piston valve and seat; valve with filter and throttle; flanges.

The main disadvantages of this regulator are the design complexity, low sensitivity when the output pressure changes, as well as the relatively low accuracy and reliability.

This is due to the fact that the functioning of the actuator of the controller is provided mainly by three devices - an amplifier, a differential gear and a distributor. Each of these devices has its own housing and is installed using special brackets on the actuator. At the same time, they are interconnected with the actuator, as well as with the inlet and outlet gas pipelines by six external impulse tubes with fittings.

The presence of a large number of impulse tubes of a small cross section and a relatively large length leads to a delay in the transmission of the control signal between the actuator, distributor, differential gear, amplifier, inlet and outlet gas pipelines.

In addition, at low ambient temperature and moisture in the gas passing through the regulator, crystallization or solidification of the gas may occur in the impulse pipes located in the environment, which can lead to a loss of the control signal and an emergency.

The technical task of the proposed utility model is to increase the accuracy and reliability of the gas pressure regulator, as well as simplifying its design.

The specified technical problem is solved in a gas pressure regulator containing an actuator with an elastic shutter, a saddle in the form of grates with throttling grooves, an input, output and control chambers, a distributor with a filter and an adjustable throttle, a differential gearbox with a spring-loaded piston valve and a saddle, an amplifier with a regulating valve, seat, diaphragm block and adjustment mechanism.

The difference from the prototype is that the amplifier is made in the form of a housing with a filter and a throttle, a spring-loaded piston valve and a seat, a control valve with a seat, a membrane unit and a setting mechanism, while their interaction with each other, the actuator, as well as the input and output pipelines produced using channels made in the amplifier housing.

An analysis of the selected patent, information and catalog materials for gas pressure regulators allows us to conclude that the proposed utility model is not known from the prior art, that is, it is new. In addition, this device does not follow explicitly from the prior art, that is, it has an inventive novelty.

In the proposed design, due to the fact that the amplifier is made in the form of a housing with a filter and a throttle, a spring-loaded piston valve and a saddle, a control valve with a saddle, a membrane unit and a setting mechanism, while their interaction with each other, the actuator, as well as the input and output pipelines produced using channels made in the amplifier housing; there is no need: in the housing parts of the distributor and differential gear; special brackets for attaching to the actuator of the amplifier and differential gear; impulse tubes with fittings. In addition, the use for interaction between the actuator, filter, throttle, spring-loaded piston valve, control valve with a membrane unit, as well as input and output pipelines of channels made directly in the housing of the amplifier and actuator, provides:

- a significant reduction in the delay in transmitting the control signal to the actuator;

- the lack of the possibility of solidification or crystallization of gas in the channels of the actuator and amplifier, since they are in close proximity to the gas flow in the inlet gas pipeline, which always has a positive temperature.

This improves the accuracy and reliability of the gas pressure regulator, as well as simplify its design.

Therefore, the proposed gas pressure regulator has the criterion of "industrial applicability".

The utility model is illustrated by drawings, where in FIG. 1 shows a general view of a gas pressure regulator (section), and FIG. 2 - section aa.

The gas pressure regulator consists of an actuator 1 and an amplifier 2.

Actuator 1 includes: housing 3; saddle in the form of grid-irons 4, 5 with throttling grooves; an elastic shutter 6, interacting with grates 4, 5 and the housing 3; input 7, control 8 and output 9 of the camera; flanges 10.

Amplifier 2 contains: filter 11; adjustable choke 12; a spring-loaded piston valve 13 with a seat 14, input 15, output 16 and control 17 cameras; a control valve with a membrane unit 18 and a seat 19, having an inlet 20, a control 21 and a discharge 22 of the chamber; setting mechanism 23 with an adjustment spring 24 and a set screw 25.

Moreover: the input chamber 7 of the actuator 1 is connected by a channel 26 to the filter 11, which in turn is connected to an adjustable inductor 12 of the amplifier 2; adjustable throttle 12 through channels 27 and 28 is simultaneously connected to the control chamber 8 of the actuator 1, as well as to the input chamber 15 of the spring-loaded piston valve 13 of the amplifier 2; the inlet chamber 15 of the spring-loaded piston valve 13 through an opening in the seat 14 is connected to the outlet chamber 16 of the spring-loaded piston valve 13, which in turn is connected by a channel 29 to the inlet chamber 20 and then through the hole in the seat 19 with the discharge chamber 22 of the control valve with the membrane unit 18 ; a discharge chamber 22 is connected by a channel 30 to the output chamber 9 of the actuator 1; the control chamber 21 of the control valve with the membrane unit 18 is connected by a channel 31 to the control chamber 17 of the spring-loaded piston valve 13, as well as with the outlet gas pipe (not shown).

The gas pressure regulator operates as follows.

High-pressure gas P _in from the inlet gas line (not shown) enters through the flange 10 into the inlet chamber 7 of the actuator 1 and through the channel 26 it enters the filter 11 of the amplifier 2, and then into the adjustable throttle 12, which ensures the stability of the controller. After the adjustable throttle 12, gas flows through the channels 27 and 28 simultaneously into the control chamber 8 of the actuator 1 and the inlet chamber 15 of the spring-loaded piston valve 13 of the amplifier 2. From the inlet chamber 15, gas enters the outlet chamber 16 through an opening in the seat 14, and then through channel 29 into the inlet chamber 20 of the control valve with the membrane unit 18. At the same time, a spring-loaded piston valve 13, the control chamber 17 of which is connected by the channel 31 to the control cavity 21 of the control valve with the membrane block 18, into which gas is supplied from the outlet gas pipeline under pressure P _out , by adjusting the orifice of the bore of the seat 14, it maintains a constant differential between the pressure in the inlet chamber 20 and the outlet pressure P _out in the control chamber 21 of the control valve with the membrane unit 18.

Prior to adjusting the controller, the set screw 25 of amplifier 2 is unscrewed, the adjustment spring 24 is completely loosened, and valve 18 is closed. There is no gas flow through the adjustable throttle 12 and therefore the pressure in the control chamber 8 is equal to the pressure in the input chamber 7 of the actuator 1. At the same time, due to the preload of the elastic shutter 6, it fits snugly against the grates 4, 5, without passing gas from the inlet 7 to output 9 camera. In this case, the regulator is closed and there is no gas flow.

Setting the regulator to the required value of the outlet pressure is carried out as follows. Using the set screw 25, the adjustment spring 24 is compressed by a certain amount, the force of the compressed spring 24 acts on the control valve with the membrane unit 18, causing it to move and open the hole of the seat 19. In this case, the gas from the control chamber 8 of the actuator 1 will be released into it the outlet chamber 9 through the channel 28, the inlet chamber 15, the hole of the seat 14, the outlet cavity 16 of the spring-loaded piston valve 13, the channel 29, the aperture of the saddle 19, the relief chamber 22 of the control valve with the membrane unit 18 and channel 30. The pressure in the control chamber 8 of the actuator device 1 will decrease relative to the inlet pressure P _in in the chamber 7, and as it decreases, the elastic shutter 6 will open, allowing the gas to pass through the throttling grooves of the grates 4, 5 into the outlet chamber 9, and then through the flange 10 and into the outlet gas pipeline (not shown). The decrease in pressure in the control chamber 8 of the actuator 1, and, consequently, the opening of the elastic shutter 6, will occur until the pressure in the outlet chamber 9, as well as the outlet gas pipeline, is equal to the pressure Р _out adjusted by the control spring 25.

The required output pressure P _o is automatically maintained by a control valve with a membrane unit 18 due to a change in pressure in the control chamber 8 of the actuator 1. An increase in the output pressure P _o causes the opening of the seat 19 to be covered by a control valve with a diaphragm block 18. The pressure in the control chamber 8 increases, the elastic shutter 6 approaches the grates 4, 5 and the gas flow through the regulator decreases to restore the set output pressure P _o . When the output pressure P decreases _O controller operates in reverse.

Thus, the design of the gas pressure regulator satisfies the technical task.

Claims (1)

A gas pressure regulator containing an actuator with an elastic shutter, a saddle in the form of grid-irons with throttling grooves, an input, output and control chambers, a distributor with a filter and an adjustable throttle, a differential gear with a spring-loaded piston valve and a saddle, an amplifier with a control valve, a saddle, and a diaphragm unit and tuning mechanism, characterized in that the amplifier is made in the form of a housing with a filter and a throttle, a spring-loaded piston valve and a seat, a control valve with a seat, a membrane unit and a tuning mechanism, while their interaction between themselves, the actuator, as well as the input and output gas pipelines are made using channels made in the amplifier housing.

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