RU2686781C2 - Gas pressure regulator - Google Patents

Abstract

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: gas pressure regulator includes actuator, stabilizer, pilot and monitor connected to each other in technological order by means of pulse gas lines. Regulator additionally includes an accelerator providing for operation of the monitor at failure of the regulator, and a silencer installed in the reduction zone between the valve and the movable seat of the regulator. Accelerator is a housing with a cover, between which a movable system is fixed, which ensures transfer of spring force to a valve installed in the accelerator housing. In the accelerator housing there is an internal channel through which the control pressure created by the pilot is released from the chamber of the actuator into the chamber of the accelerator with pulse pressure. Noise silencer is made in the form of at least one foam metal ring with porosity of not more than 10 ppi.

EFFECT: higher reliability and accuracy of valve reduction.

1 cl, 3 dwg

Description

The invention relates to devices for automatically maintaining the pressure of the working medium at a given level and is intended to provide industrial and municipal consumers with natural gas. The regulator in accordance with the present invention belongs to the class of pilot regulators.

The prior art gas pressure regulator according to the patent of the Russian Federation No. 2319193, containing an actuator, a pressure stabilizer with a bypass line and a pilot having a multi-chamber design, an adjustable throttle and a valve, while the stabilizer is made with a bypass hidden inside the case. the stabilizer body partition, the pilot is made with a channel in which the pilot valve is centered, and an adjustable throttle is installed in the pilot’s wall so that its axis is parallel to the pilot’s axis and it is connected to pilot cameras using channels.

The main disadvantage of this gas pressure regulator is the absence of an accelerator, which leads to its limited use as a protective reinforcement (as a regulator-monitor).

The closest in technical essence to the claimed invention is a gas pressure regulator manufactured by Tartarini (tartarini.nt-rt.ru ›images / manuals / FL_IN.pdf), the design features of which are disclosed in promotional materials published on the company's website.

Nevertheless, the well-known regulator has the following disadvantages, which are expressed primarily in the need for additional installation of the accelerator pulse line for pressure relief in the pulse channel, as well as in the lower efficiency of the built-in noise suppressor due to the use of materials with a lower degree of sound absorption.

The technical problem to be solved by the claimed invention is the need to overcome the drawbacks inherent in the analogues and the prototype, by creating the design of a gas pressure regulator with enhanced reliability and ensuring the safety of the gas distribution system as a whole.

The technical result achieved when using the claimed invention is to improve the reliability and accuracy of the reduction.

The problem is solved by the fact that the inventive gas pressure regulator, which includes interconnected in a technological order by means of pulsed gas pipelines, an actuator, a stabilizer, a pilot and a monitor, characterized in that it includes an accelerator ensuring the operation of the monitor when the regulator fails and a silencer installed in the reduction zone between the valve and the movable seat of the regulator, while the accelerator is a housing with a lid, between which is fixed a movable syst This ensures the transfer of spring force to the valve installed in the accelerator case, while an internal channel is made in the accelerator case through which the pilot pressure created by the pilot is discharged from the actuator chamber into the accelerator chamber with pulse pressure. The muffler can be made in the form of at least one ring of foam metal with a porosity of not more than 10 ppi.

The shutter of the inventive regulator closes faster compared to regulators of similar design in the absence of an accelerator, which, respectively, provides a smaller increase in pressure at the outlet during the transient process. The presence of an accelerator allows you to more quickly close the main valve in the event of a cessation of gas flow, and also increases reliability when the regulator pilot fails. In the case of use with the regulator-monitor, the accelerator allows the monitor to more quickly reach the setting pressure when the regulator fails. The muffler reduces the noise level by about 20-25 dB, and in the high-frequency spectrum by more than 25 dB.

The invention is illustrated by the following drawings.

FIG. 1 shows a schematic depiction of the claimed controller assembly.

FIG. 2 shows a side view of the inventive regulator.

FIG. 3 schematically depicts an accelerator included in the inventive regulator.

Positions in the drawings indicated.

1. pilot

2. the actuator

3. stabilizer

4. impulse tube

5. accelerator

6. spring

7. sleeve (saddle)

8. mobile actuator system,

9. cavity with control pressure

10. silencer,

11. the main valve

12. adjusting screw

13. accelerator cover,

14. spring

15. mobile accelerator system

16. pressure chamber,

17. accelerator spring,

18. valve accelerator

19. internal channel of the accelerator,

20. accelerator case,

21. accelerator seat,

22. camera accelerator connected to the output of the pilot 1.

The inventive gas pressure regulator consists of an actuator 2, divided into two cavities by a movable system 8, a stabilizer 3, a pilot 1 connected to a stabilizer with a hollow choke, an accelerator 5 connected to chamber 9 with a hollow pulse tube 4. The regulator includes a silencer 10, which is installed into the actuator 2 directly into the reduction zone between the sleeve (seat) 7 and valve 11, so that the gas flow passes through the body of the silencer 10. The sleeve 7 is tightened to valve 11 by means of a spring 6.

The muffler is a ring or a set of rings made of foam with a porosity of no more than 10 ppi (10 pores per inch). The thickness of the rings can be chosen different and depends on the design and size of the regulator. The muffler is designed to reduce acoustic energy, which occurs both by converting it into thermal energy as a result of frictional forces when gas flows through the channels between the cells of the porous material, and by splitting the gas flow into many small multidirectional jets. The highest efficiency of the built-in noise suppressor is observed in the high frequency range and, as a rule, is more than 25 dB.

The monitor incorporates an accelerator 5, which provides a faster response of the monitor when the regulator fails. The accelerator consists of a housing 20, a lid 13, a moving system 15 fixed between the housing and the lid, an adjusting screw 12 with a spring 14, a seat 21 and a valve 18 spring loaded 17. The inner channel 19 connects the chamber 22, which in turn is connected to the chamber 9 actuators, with a camera 16.

The inventive regulator operates as follows.

The inlet pressure flows into the liner 7 of the actuator 2 and into the inlet of the stabilizer 3. The outlet pressure of the stabilizer is supplied to the inlet of the pilot 1. With the pilot spring fully free, the pilot valve is in the closed state. The regulator is off.

Adjusting the regulator to a predetermined pressure is carried out by rotating the pilot adjustment screw. The pilot opens, the control pressure flows into the right cavity of the diaphragm chamber of the actuator.

When the regulator is operating, the pressure in front of the throttle of the discharge line, and, consequently, in the right-hand cavity of the diaphragm chamber of the actuator is always higher than the pressure downstream of the regulator.

The pressure difference on the membrane of the movable system 8 creates an axial force. The shutter knob opens. In steady state, the moving elements of the controller are in equilibrium. Any change in the inlet pressure or gas flow causes a change in the outlet pressure and, consequently, the pressure in the left cavity of the diaphragm chamber of the actuator, which causes the moving system to move to a new equilibrium state, in which the outlet pressure returns to the specified value.

At zero gas flow, the pilot and actuator valves are sealed by increasing the outlet pressure. The regulator is closed.

The monitor is set to the main regulator. It performs the function of protective fittings. In case of failure of the regulator and increase of the output pressure, the monitor enters into operation and protects the consumer from output pressure exceeding in accordance with its settings. Most of its work, the regulator-monitor is in the fully open position and the faster it comes into operation, in the event of an accident, the lower the output pressure will rise. The accelerator installed in the monitor allows it to quickly reach the operating parameters.

The operation of the accelerator is as follows. If the force on the moving system 15 created by the spring 17 and the pulse (output) pressure in the cavity 16 is balanced by the force of the spring 14, then the valve 18 of the accelerator is closed. In the event of an increase in pressure in the chamber 16, and if the force generated by the pressure exceeds the force of the spring 14, then the movable system 15 together with the valve 18 will begin to move upwards, creating a gap between the valve 18 and the seat 21, through which the chambers 22 and 16 communicate through the channel 19. As a result, the control pressure is released from the chamber 9 through the pulse tube 4 into the pulse chamber 16. Under the action of the spring 6, the saddle 7 is set in motion with the moving system 8. The gap between the valve 11 and the seat 7 is reduced until the pressure after the regulator-monitor does not accept the value previously adjusted.

A distinctive feature of the use of the inventive accelerator from the known analogues is the presence of an internal channel 19 through which the control pressure is discharged from the chamber 9 of the actuator created by the pilot 1 (control regulator) into the chamber with pulse pressure 16. This solution allows you to do without installing a separate impulse tube for dropping the control pressure into the output gas pipeline, and, therefore, minimize the number of threaded connections, and, accordingly, increase by reliability of the accelerator.

Claims (2)

1. Gas pressure regulator, which includes an actuator interconnected in a technological manner by means of pulsed gas pipelines, a stabilizer, a pilot and a monitor, characterized in that it includes an accelerator providing monitor operation when the regulator fails and a silencer installed in the reduction zone the valve and the movable seat of the regulator, while the accelerator is a housing with a lid, between which is mounted a movable system that provides the transmission of spring force to The valve mounted in the housing of the accelerator, the accelerator in the housing is formed an inner channel through which the discharge generated by the pilot signal pressure from the actuator chamber in a pulsed accelerator chamber pressure. 2. The gas pressure regulator according to claim 1, characterized in that the silencer is made in the form of at least one ring of foam metal with a porosity of not more than 10 ppi.

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