SU1330612A1 - Gas pressure regulator - Google Patents

Abstract

The invention Relates to the gas industry and can be used in the transportation and consumption of natural gas. The aim of the invention is to increase the reliability of the regulator by preventing hydrate formation on the throttling valve of the differential pressure stabilizer. The gas pressure regulator contains the actuator 1, the pilot device 2 and the pressure differential regulator 3. New in the gas pressure regulator is implemented (// J gA

Description

This pressure differential stabilizer, which includes a housing 11, divided by a partition 12 into the first 21 and second 22 parts, in the second cavity is placed a spring-loaded piston 19 with a rod 15, an axial channel 17, through which the piston

The invention relates to the gas industry and can be used in the transportation and consumption of natural gas.

The purpose of the invention is to increase the reliability of the gas pressure regulator.

The figure schematically shows a gas pressure regulator.

The gas pressure regulator contains an actuator including a housing 1, a membrane sensing element 2, a tubular valve 3, a first A, a second 5 control cavities, an input 6 and an output 7 cavity, a pilot device with an input 8, b1-stroke 9, control chamber fD, stabilizer of pressure difference, including body 11, partition 12, first 13, second 14 cavities, spring-loaded piston 15, rod 16, axial channel 17, sub piston 18, throttle valve 19, output 20, stabilizer inlet 21 differential pressure relief valve 2 2. The pilot device contains a spring 23, a membrane 24, an inlet 23, an exhaust valve 26.

The gas pressure regulator operates as follows.

The gas pressure from the inlet cavity 6 goes to the inlet fitting 21 of the differential pressure stabilizer, through the open valve 19 and the outlet 20 comes to the inlet 8 of the pilot device and through the open inlet valve 25 to the control cavity 5 of the working device, while the tubular valve 3 moves to the left and the gas enters the regulator output, and from the regulator output - into the pilot device and into the second cavity 14 of the stabilizer, the differential pressure controller.

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1330612

The cavity 23 is connected to the first cavity 21. The installation in the partition wall of the safety valve body 24 is concentric to the stem and the connection of its first cavity to the inlet of the pilot device improves the reliability of the gas pressure regulator. 1 silt

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As soon as the force from the gas pressure on the membrane 24 of the pilot device is balanced by the force of the spring 23, the valve 25 closes and the movement of the tubular valve 3 to the left is stopped. At the same time, at the outlet 20 of the differential pressure stabilizer, a pressure is established equal to the outlet in the cavity 14 plus the pressure from the spring force of the spring-loaded piston 15 at its place. This pressure difference in the cavities 13 and 14 must always be greater than the pressure differential required to move the movable sleeve of the valve 3 to the left for a full stroke.

If, when the flow rate decreases, the pressure at the regulator outlet becomes higher than the one specified by the spring 23 of the pilot device, the membrane 24 moves up, the valve 26 opens and part of the gas from the actuator cavity 5 is released to the output 7, the valve 3 moves to the right, the flow through the regulator decreases and the outlet pressure is reduced to a predetermined.

With increasing gas extraction, the pressure at the outlet of the regulator drops below a predetermined amount, the membrane 24 of the pilot device moves downwards, the valve 25 opens and gas is supplied to the actuator cavity 5, the differential pressure regulator valve 19 opens and the movable valve 3 moves to the left, increasing the flow gas through the regulator, and the pressure is restored to the desired value.

 At the end of the adjustment process, the valves 25 and 26 of the pilot device and the valve 19 of the stabilizer over-: pressure drop are closed, the control systems 5

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 does not consume gas. If the valve 19 is not tight in the stabilizer cavity 13, an increase in pressure occurs. As soon as the pressure from the pressure drop in the cavities 13 and 14 to the area of the safety valve 22 exceeds the spring force of the spring-loaded piston 15, the valve 22 moves to the right and the gas begins to bleed from the cavity 13 into the cavity 14 and further into the output pipeline to the output 1. Thus the possibility of the destruction of the seal of the valve 19 from the force caused by the large differential on the piston 15 is excluded. Since the area of the valve 22 is smaller than the area of the piston 15, the opening of the valve 22 occurs with a larger differential than the opening of the valve 19 associated with sh- 15 therein under the action of the same spring a spring-loaded piston 15. Moreover, the seal 27 of the valve 22 are operated at a small difference, while in the known device in such a complete sealing effect (inlet) pressure, which leads to its rapid wear. In this regulator there are no long narrow channels prone to frosting (the channel in the piston 15 is non-expendable, since it is connected with a dead-end cavity).

Claims (1)

Claims of Invention The gas pressure regulator containing the actuator, in the box Editor M. Dzsyn Order 3580/49 Tehred M. Khodanych Proofreader Circulation 863 Subscription VNIISH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 five g five 0 which has a membrane sensing element dividing the body into the first and second control cavities and connected to a tubular valve installed between the inlet cavity and the output cavity of the body, a pilot device, the control chamber of which is connected to the output cavity of the actuator, and the output is connected to the second control cavity of the actuator, the differential pressure regulator, the output of which is connected to the input of the pilot device, with the differential pressure stabilizer soda The housing is divided by a partition into the first cavity and the second cavity in which a spring-loaded piston with a rod is placed, in which an axial channel is made, through which the piston chamber is connected to the first cavity, and the end of the piston is a throttle valve, the second cavity of the differential pressure stabilizer is connected with an output cavity of the actuator, characterized in that, in order to increase the reliability of the regulator, the pressure differential stabilizer is equipped with a safety valve, displacements in the housing wall concentrically to the rod, and the first cavity it is output differential pressure stabilizer. Compiled by N. Mirna Tehred M. Khodanich Proofreader G. Reshetnik