RU86328U1 - Gas pressure regulator - Google Patents

Gas pressure regulator Download PDF

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Publication number
RU86328U1
RU86328U1 RU2009111243/22U RU2009111243U RU86328U1 RU 86328 U1 RU86328 U1 RU 86328U1 RU 2009111243/22 U RU2009111243/22 U RU 2009111243/22U RU 2009111243 U RU2009111243 U RU 2009111243U RU 86328 U1 RU86328 U1 RU 86328U1
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RU
Russia
Prior art keywords
actuator
pilot
gas pressure
connected
housing
Prior art date
Application number
RU2009111243/22U
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Russian (ru)
Inventor
Андрей Валериевич Ястребов
Денис Сергеевич Матюшев
Original Assignee
Общество с ограниченной ответственностью "Газстрой"
Общество с ограниченной ответственностью ПТО "Волга-Газ"
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Priority to RU2009111243/22U priority Critical patent/RU86328U1/en
Application granted granted Critical
Publication of RU86328U1 publication Critical patent/RU86328U1/en

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Abstract

1. The gas pressure regulator containing an actuator configured to connect between the input and output lines and connected on the input line side with a pressure stabilizer, in turn connected to the pilot, the actuator includes a housing with a cover, a membrane actuator dividing the cavity of the actuator to the executive and control chambers, while the pilot output is connected through the first throttle to the control chamber, and the output line is connected to the executive chamber and the pilot, from characterized in that it is equipped with a pulse rack with a second throttle located inside it, configured to ensure that output pressure fluctuations are not eliminated during operation, while the pulse rack is mounted on the housing of the actuator from the entrance to the actuator, providing an output line to the actuator and the pilot, and the first throttle is located in the cover of the actuator, the stabilizer is configured to control the outlet gas pressure, and the pilot’s output, connected through the first choke to the control chamber, simultaneously connected through the second choke to the executive chamber. ! 2. The gas pressure regulator according to claim 1, characterized in that the pilot is equipped with an adjusting cup integrated in the pilot housing and made with the possibility of movement to ensure adjustment of the outlet pressure. ! 3. The gas pressure regulator according to claim 1, characterized in that the membrane element of the membrane actuator actuator is molded from crude rubber HO-68, and the housing with a cover actuator

Description

The utility model relates to the technique of automatic gas control, namely to gas control equipment and can be used in gas supply systems of industrial and agricultural facilities, as well as in public utility facilities that require automatic maintenance of the gas outlet pressure at a given level. The design of the claimed utility model provides high reliability during operation and can be recommended for installation in natural gas supply systems of hazardous production facilities.

With the help of gas pressure regulators, the operating mode of the gas distribution system is controlled, which automatically maintains a constant pressure at the sampling point, regardless of the intensity of gas consumption. When regulating the pressure, the initial - higher - pressure decreases to the final - lower pressure. This is achieved by automatically changing the degree of opening of the membrane block of the actuator of the regulator, as a result of which the resistance to the passing gas flow automatically changes.

An automatic pressure regulator consists of a master and an actuator. The main part of the actuator is a sensing element that compares the signals of the setter and the current value of the regulated pressure. The actuator converts the command signal into a regulatory action and into the corresponding movement of the moving part of the regulatory body due to the energy of the working medium - gas. Regulation is provided by the mobile state of the regulatory body of the actuator.

In gas distribution systems, the following types of automatic gas pressure regulators (by type of load) are most common:

- Direct pressure gas pressure regulators with spring and lever-spring loads, for example, RDGD-20 and RDSK-50 gas pressure regulators, in which the force of the working membrane is transmitted directly to the valve located on the stem and fixed in the center of the membrane. In order to unload the valve from the influence of inlet pressure, an additional unloading diaphragm is used.

- Indirect gas pressure regulators with a command device - control regulator (pilot), for example, devices like RDUK2, RDBK1, RDG. The regulation process is determined by the interaction of the outlet pressure on the working membrane, the forces of the so-called control pressure supplied from the pilot to the submembrane space, the load of moving parts, and the friction forces in the joints (http://www.exform.ru/catalog/regulator/RDP/).

Pilot gas pressure regulators have fairly wide intervals of inlet and outlet pressure and throughput. These factors are provided by the impact on the working membrane of the gas pressure regulator of the sub-membrane control pressure created by the pilot, instead of the direct impact of the tuning spring on the membrane.

Known direct-flow gas pressure regulator containing a housing with a lockable hole and coaxial outlet and inlet nozzles. In the housing, on the same axis as the nozzles, there is a piston sensitive actuator with a radial bracket having input and output pressure supply channels, and a locking and regulating body containing a shutter and a seat. The device is equipped with a collector concentrically located to the gate, made in the form of a cylinder with windows for the passage of gas, having a passage section varying depending on the shutter stroke, which is determined by the required flow characteristic. One part of the collector is rigidly connected to the drive, and a movable hard metal seat with a seal along the supporting end is installed in the other with axial and radial clearances. The surface of the seat in contact with the gas stream and the shutter is conical, and its profile is part of the overall smooth profile of the gas channel (Patent for the invention of the Russian Federation No. 2125737, IPC: G05D 16/06).

This invention is characterized by increased reliability of the shut-off regulating body of the direct-flow gas pressure regulator, however, it does not provide high stability during sharp surges in the gas pressure supplied to the regulator inlet.

A known direct pressure gas pressure regulator RDUV manufactured by Staroruspribor LLC, which includes an actuator with mating flanges and a driver connected to the actuator with copper or brass tubes. As a master device, either a reduction gear-setter on the RDU 100/50 and RDU 100/80, or a differential gear with an amplifier on the RDU 100/100 and RDU 63/100 are installed. Actuators of regulators of all sizes are structurally similar and differ from each other in standard sizes and are the final link in the automatic control system. When moving the shutter, the flow area of the actuator changes, and, consequently, the amount of gas passing through. This ensures that the outlet pressure is maintained at a predetermined value during fluctuations in gas consumption or inlet pressure. The shutter is moved by changing the control pressure supplied to the actuator actuator from the master. Inlet gas is used to power the driver. The actuator consists of a housing with a cover, a membrane actuator, a shutter, a return spring, a saddle and a casing. The seat is located in the inner cavity of the lid on the ribs. To ensure the tightness of the actuator, the latter is equipped with a gasket attached to the saddle by means of a screw. The shutter is made in the form of a thin-walled pipe and is connected to the membrane actuator using a disk and two washers. In the initial position, the shutter is pressed against the saddle with a return spring (see http://www.staroruspribor.ru/files/catalog/gallery/0/66/9.pdf RDU Operation Manual 00.00.00RE).

Also known is a gas pressure regulator comprising an actuator, a pressure stabilizer with a bypass line, and a pilot having a multi-chamber structure, an adjustable throttle, and a valve. The stabilizer is made with a bypass line hidden inside the case, which is a channel in the partition of the stabilizer body. 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 connected to the pilot’s chambers using channels (Patent for invention No. 2319193, IPC: G05D 16/00 )

However, the known gas pressure regulators are characterized by unstable operation during sudden surges in the gas pressure supplied to the inlet of the regulator.

Closest to the claimed technical solution is a gas pressure regulator containing an actuator, a pressure stabilizer and a pilot. The pilot includes an adjustable throttle. The pilot output line is connected to the control chamber of the actuator and through an adjustable throttle to the gas consumer pipe, and the output of the actuator is connected to the pressure stabilizer feedback line and the pulse chamber of the actuator (Utility Model Patent of the Russian Federation No. 25105, IPC: G05D 16/06).

However, this gas pressure regulator is also characterized by unstable operation during sharp jumps in the gas pressure supplied to the regulator inlet.

The task to which the claimed technical solution is directed is to create a simple and reliable direct-flow gas pressure regulator in operation.

The technical result is to increase the stability and safety of the gas pressure regulator.

The problem is solved in that the gas pressure regulator containing an actuator configured to connect between the input and output lines, and connected on the input line side with a pressure stabilizer, in turn connected to the pilot, the actuator includes a housing with a cover, a membrane actuator dividing the cavity of the actuator into the actuating and control chambers, while the pilot output is connected through the first throttle to the control chamber, and the output line is connected to the executive chamber and the pilot, according to the technical solution, is equipped with a pulse rack with a second throttle located inside it, configured to ensure that output pressure fluctuations are not eliminated during operation, while the pulse rack is mounted on the housing of the actuator from the input side of the executive chamber, providing an output connection lines with an executive chamber and a pilot, and the first throttle is located in the cover of the actuator, the stabilizer is adjustable gas output pressure, and the pilot output, connected through the first throttle to the control chamber, is simultaneously connected through the second throttle to the executive chamber.

In addition, the pilot is equipped with an adjustment cup integrated in the pilot housing and made with the possibility of movement to ensure adjustment of the outlet pressure. The membrane element of the actuator’s membrane actuator, as well as the pilot’s membrane element, can be cast, for example, from crude rubber HO-68, and the housing with the actuator cover is made of aluminum grade AK 5 M2 to AK 12 OCH. The working surface of the valve actuator is covered with a layer of vulcanized rubber. The adjustment cup and the pilot housing are connected by means of a threaded connection, while the cavity of the adjustment cup is made in communication with the cavity of the pilot housing, which is made of aluminum.

In the claimed utility model, the pilot is used as a pressure adjuster. Pressure is supplied to the pilot through an adjustable stabilizer, which ensures a constant pressure drop across the pilot. The presence of an adjustable stabilizer allows you to stabilize the pressure at the outlet of it, depending on the input pressure. Accordingly, a preset pressure is applied to the pilot’s input, which is set to “normal” (uninterrupted) pilot operation. Existence of an impulse rack facilitates installation of the regulator on an object. The presence of a second throttle located in the impulse rack allows the pressure regulator to be set to work without self-oscillations.

The utility model is illustrated by drawings, where in Fig. 1 the claimed design is schematically presented, in Fig. 2 is a block including an actuator with a pulse stand, in Fig. 3 is an assembled device, top view. The positions in the drawing indicate: 1 - actuator, 2 - stabilizer, 3 - pilot, 4 - impulse rack, 5, 6 - chokes, 7 - actuator housing, 8 - actuator housing cover, 9 - diaphragm actuator, 10 - actuator (pulse) chamber, 11 - control chamber, 12 - sleeve (shutter-bushing), 13 - spring, 14 - valve, 15 - nut, 16 - membrane element, 17 - disk, 18 - fasteners, 19 - 21 executive channels devices, 22 - sealing elements, 23 - pilot housing, 24 - pilot cover, 25 - pilot membrane element, 26 - valve Lot 27 - pilot rod, 28 - a spring, 29 - the glass.

The direct-flow gas pressure regulator contains an actuator 1, a stabilizer 2, and a pilot 3 connected by pipelines. The regulator is equipped with a pulse rack 4 fixed to the actuator 1 and two chokes 5, 6. The actuator 1 is a housing 7 with an inlet flange equipped with a cover 8 with outlet flanges. Between the housing 7 and the cover 8, a membrane actuator 9 is fixed, dividing the cavity of the actuator 1 into an actuator (pulse) 10 and a camera control 11, which is connected to the locking body in the form of a movable sleeve (shutter-bushing) 12. The sleeve is made with the possibility of reciprocating movements in the guide bushings of the housing and cover. In the initial state, the sleeve 12 is preloaded by a spring 13 and interacts with a valve 14 fixedly mounted in the cover 8 by means of a nut 15. In this case, the pulse chamber 9 is formed by the walls of the housing 7 and the membrane drive, the control chamber 10 is formed by a membrane drive and a cover 8. The membrane drive 9 represents a membrane element 16 with a plate, mounted on the disk 17 by means of fasteners 18. The membrane element 16 is made by casting crude rubber HO-68. The actuator 1 is equipped with channels 19, 20 for supplying the set and output pressures made in the housing 7 and the cover 8, respectively, as well as a channel 21 made in the inlet flange for communication with the stabilizer. In this case, the channel 19 is designed to connect the cavity of the pulse chamber 10 with the pilot 3, the channel 20 is used to connect the control chamber 11 to the output line (outlet gas pipeline). The actuator is equipped with sealing elements 22, made in the form of rubber rings, designed to seal the sleeve 12 when it is reciprocating. The working surface of the valve 14 is covered with a layer of vulcanized rubber. In the channel 20, located in the lid on the side of the control chamber, a first inductor 5 is built in. The cavity of the chamber 10 is connected to the pilot 3 and the output line through a pulse rack 4, which is mounted on the housing 7 and is equipped with a second gas supply from the stabilizer throttle 6. The housing of the actuator can be made of aluminum grade AK 5 M2.

The stabilizer 2 is configured to control the gas pressure at the outlet to ensure a stable gas supply to the pilot inlet 3, which eliminates the influence of fluctuations in the input pressure on the operation of the regulator as a whole. The output of the pilot 3 is connected through the first throttle 5 to the control chamber 11 and through the second throttle 6 to the executive chamber 10. The purpose of the pilot is to set the pressure on the output line (behind the actuator) and maintain its constant value. The pilot in its design is similar to the stabilizer and consists of a housing 23 with a cover 24, between which there is a spring-loaded membrane element 25 made of molded rubber, coupled to the valve 26 using the rod 27, while the valve 26 is spring-loaded 28. The pilot is equipped with an adjustment cup 29 located coaxially with the cylindrical cavity of the housing 23. The adjusting cup 29 and the pilot housing 23 are connected by means of a threaded connection, providing movement of the cup 29, necessary to adjust the output pressure. The pilot housing 23 is made of aluminum. The outlet gas pipeline (outlet line) through the channel of the impulse strut 4 is connected to the supranembrane cavity of the pilot 3 and the executive chamber 10.

The gas pressure regulator operates as follows. If there is no pressure at the inlet of the regulator under the influence of the spring 13, the sleeve 12 is pressed against the working valve 14. The regulator is closed, there is no gas in the output line (gas consumer pipeline). The stabilizer and pilot are pre-adjusted to the required gas pressure. When gas is supplied to the inlet line, the inlet pressure enters the actuator 1 and the stabilizer 2. From the outlet of the stabilizer 2, the reduced (adjusted) pressure enters the pilot inlet 3. From the pilot 3, the reduced pressure enters the control chamber 11 through the throttle 5, and also through the inductor 6, mounted on the pulse rack 4, into the Executive chamber 10. The Executive chamber 10 is connected to the gas pipeline (output line) behind the regulator. A controlled gas pressure is also supplied to the supranembrane cavity of the pilot 3. Due to the continuous flow of gas through the throttle 5, the pressure in front of it, and therefore in the control chamber 11 of the actuator 1, is always higher than the output (controlled) pressure. The difference on the membrane element 16 of the actuator 1 creates an axial force, which for any established mode of operation of the regulator is balanced by the pressure drop across the valve 14. Any change in the input pressure or gas flow instantly causes the output pressure to deviate from the set pressure and, therefore, the membrane element 25 of the pilot 3 moves . In this case, the gas flow rate at the pilot exit changes and, as a result, the gas pressure in the control chamber 11 of the actuator 1, which causes the membrane membrane to move water 9 with the sleeve 12 in the new equilibrium state, in which the output pressure is returned to a predetermined value. Adjustable chokes are used to configure the controller to operate without self-oscillations.

The claimed technical solution is characterized by a high level of safe operation and a long service life without maintenance (up to 20 years or more). The presence of adjustable pilots and stabilizers in the circuit, as well as the presence of seals and high manufacturing accuracy, can increase the stability of the regulator during sharp surges in the gas pressure supplied to the device inlet. In the claimed device, all the advantages of direct-flow regulators are fully preserved: unloading of the valve seat with an increase in its diameter, and therefore, an increase in throughput, shutter tightness, the practical absence of noise, vibration. The stability of maintaining the outlet pressure is 1-2%. The regulator works equally stably when the input pressure is reduced to 0.05 MPa and when increased to the maximum. Fully stable parameters were obtained with sharp changes in the output pressure and flow rate. The effect of "freezing" is completely absent. At zero gas flow, the pressure increase after the regulator is within the range of maintaining the stability of the outlet pressure.

Claims (6)

1. The gas pressure regulator containing an actuator configured to connect between the input and output lines and connected on the input line side with a pressure stabilizer, in turn connected to the pilot, the actuator includes a housing with a cover, a membrane actuator dividing the cavity of the actuator to the executive and control chambers, while the pilot output is connected through the first throttle to the control chamber, and the output line is connected to the executive chamber and the pilot, from characterized in that it is equipped with a pulse rack with a second throttle located inside it, configured to ensure that output pressure fluctuations are not eliminated during operation, while the pulse rack is mounted on the housing of the actuator from the entrance to the actuator, providing an output line to the actuator and the pilot, and the first throttle is located in the cover of the actuator, the stabilizer is configured to control the outlet gas pressure, and the pilot’s output, connected through the first choke to the control chamber, simultaneously connected through the second choke to the executive chamber.
2. The gas pressure regulator according to claim 1, characterized in that the pilot is equipped with an adjusting cup integrated in the pilot housing and made with the possibility of movement to ensure adjustment of the outlet pressure.
3. The gas pressure regulator according to claim 1, characterized in that the membrane element of the actuator of the membrane actuator is molded from crude rubber HO-68, and the housing with the actuator cover is made of aluminum grade from AK 5 M2 to AK 12 OCH.
4. The gas pressure regulator according to claim 1, characterized in that the working surface of the valve actuator is covered with a layer of vulcanized rubber.
5. The gas pressure regulator according to claim 1, characterized in that the pilot membrane element is made of molded rubber.
6. The gas pressure regulator according to claim 2, characterized in that the adjusting cup and the pilot housing are connected by a threaded connection, while the cavity of the adjusting cup is made in communication with the cavity of the pilot housing, which is made of aluminum.
Figure 00000001
RU2009111243/22U 2009-03-30 2009-03-30 Gas pressure regulator RU86328U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2009111243/22U RU86328U1 (en) 2009-03-30 2009-03-30 Gas pressure regulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2009111243/22U RU86328U1 (en) 2009-03-30 2009-03-30 Gas pressure regulator

Publications (1)

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RU86328U1 true RU86328U1 (en) 2009-08-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2603855C2 (en) * 2011-04-20 2016-12-10 Теском Корпорейшн Inline back pressure regulating valve
RU2643428C2 (en) * 2012-12-28 2018-02-01 Эмерсон Процесс Менеджмент Регьюлэйтор Текнолоджиз, Инк. Regulator of refrigeration with light start of the pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2603855C2 (en) * 2011-04-20 2016-12-10 Теском Корпорейшн Inline back pressure regulating valve
RU2643428C2 (en) * 2012-12-28 2018-02-01 Эмерсон Процесс Менеджмент Регьюлэйтор Текнолоджиз, Инк. Regulator of refrigeration with light start of the pump

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MM1K Utility model has become invalid (non-payment of fees)

Effective date: 20100331