SU1520494A1 - Gas pressure regulator - Google Patents

Abstract

The invention relates to automation, in particular to gas pressure regulators, and can be used in areas of national economy where it is necessary to reduce and maintain the pressure of the medium at a given level. The purpose of the invention is to simplify the design, increase operational reliability and damping oscillations in the inlet and outlet pipelines. In the regulator, the inlet 1 and outlet 2 nozzles are connected by a cone-shaped transition 3. There are two washers in the cavity of nozzle 2: deaf washer 5 and perforated washer 4 with openings forming quench chambers 6 and 7. The reducing nozzle 8 with valve 9, a sensing mechanism with a screw 12, a spring 13, a membrane 11 and a rod 10 is made on the surface of the nozzle 2. The regulator is structurally simple and allows damping gaseous medium in the inlet and outlet nozzles. 4 il.

Description

one

(21) 4298296 / 24-24

(22) 08/19/87

(46) 07.11-89. Bup. P 41

(71) Saratov branch of the Special Design Bureau of the All-Union Scientific-Production Association Soyuzgazavtomatika

(72) Yu.Io Nuzhdin

(53) 621.646.3 (088.8)

(56) USSR Author's Certificate No. 758086, class G 05 D 7/01, 1978.

(54) GAS PRESSURE REGULATOR

(57) The invention relates to automation, S in particular to gas pressure regulators, and can be used in areas of national economy where it is necessary to reduce and maintain pressure at a predetermined level.

environment. The purpose of the invention is to simplify the design, increase operational reliability and damping oscillations in the inlet and outlet pipelines. In the regulator, inlet 1 and outlet 2 nozzles are connected by a cone-shaped transition 3. In the cavity of nozzle 2 there are two washers — a blind washer 5 and a perforated washer 4 with holes, the absorbing chambers 6 and 7 are located. On the surface of the nozzle

1 performed reducing nozzle 8 with valve 9, on the surface of the nozzle

The complete mechanism with screw 12, spring 13, diaphragm 11 and rod 10 is complete. The regulator is structurally simple and allows suppressing oscillations of the gaseous medium in the inlet and outlet nozzles. 4 il.

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entrance

SP ND

About 4ib CO

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The invention relates to automation, in particular to pressure and gas regulators, and can be used in areas of national economy where it is necessary to reduce and maintain at a given level of pressure of the medium.

The purpose of the invention is to simplify the design, increase operational reliability, and damp the oscillations in the inlet and outlet pipelines.

FIG. 1 shows a gas pressure regulator; in fig. 2 - the same, top view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 regulator, view - isometric.

The gas pressure regulator consists of a body made in the form of coaxially connected nozzles - output 1 (small diameter for large pressure) and output 2 (larger diameter for small pressure), connected by a cone-shaped transition 3 and washers 4 and 5 gesture bones, forming respectively input 6 and output 7 of the vibration damping chamber. On the surface of the inlet pipe 1, there is a radial nozzle 8, which serves as a valve seat 9 located on the stem 10, which is connected to the membrane of the sensing mechanism t1. The pressure value is regulated by a screw 12, which acts on the spring 13 and transmits the force to. the membrane. - The washer 4 has through holes 14, the number and diameter of which is determined by calculation, depending on the length and volume of the outlet nozzle and the frequency of the oscillations that occur. The deaf washer 5 separating the inlet 6 and the outlet 7 of the quenching chamber is installed at the calculated distance from the cone-shaped transition. This distance is determined in each specific case depending on the parameters of the main gas pipeline and the conditions of its operation. The width of the tapered junction h is determined according to GOST. The lateral surface of the inlet nozzle in the area located in the zone; the inlet quench chamber is perforated with openings 15, the diameter and number of which is also determined by calculation.

The gas pressure regulator operates as follows.

-

Jq

||

JQ 25 DA 35 40 45 JQ

The gaseous medium is fed to the pressure regulator in the inlet 1, the plugged end of which is coaxially inserted into the outlet pipe 2 of larger diameter. The depth of placement of the inlet nozzle 1 in the nozzle 2 is determined by calculation, depending on the required volume of chambers b and 7 of damping. On the surface of the inlet nozzle 1, a reducing nozzle 3 is completed, which is closed by a valve 9. A sensing mechanism 11 mounted on the flange coaxially with a reducing nozzle 8 controls the valve 9 through the rod 10. The pressure at the regulator's outlet is caused by an adjusting screw 12 which via a spring 13 affects the membrane of the sensing mechanism 11. Gas passed through the inlet

1 is reduced through the nozzle 8 into the internal volume of the outlet nozzle.

2. As the volume inside the outlet nozzle 2 is filled, pressure is applied through the flange opening on the membrane of the sensing mechanism 11. When a certain pressure is reached, the membrane of the sensing mechanism 11 overcomes the force of the spring 13, rises up and through the rod 10 acts on loianaH 9, closing - yyuschy nozzle 8. Po. As the gas flow rate decreases, the outlet pressure decreases and the valve 9 reopens the nozzle 8.

 In the process of gas transportation in the main pipeline before and after the regulator, oscillations of the gaseous medium arise, which propagate in a wavelike manner along the pipeline, which causes disturbances in the operation of the pressure regulator D extinguishing of these oscillations in the pressure regulator. fluctuations, the volume of which is calculated as follows

V, 21ГГ h + hf Rh.,; ,

where f is the average radius of the washer; R is the width of the ring; h is the length of the cylindrical part; h, - the length of the cone-shaped transition

The length of the cylindrical part h and the length of the cone-shaped transition h are determined during the design study of the product calculation and depend

in each case, on the parameters of the gas pipeline and the conditions of its operation,

When a gaseous medium oscillates, the wave crest passes through the openings of the rigidity washer 4, a high pressure is created inside the chamber. When the amplitude changes to a minimum of pressure, from the chamber 7 oscillations through the holes in the stiffness washer 4, the gaseous medium flows into the exhaust pipe 2, thus equalizing the amplitude of oscillations. In the same way, the entrance to the vibration damping chamber works.

The regulator is structurally simple and allows to quench the oscillations of the gaseous medium.

I

Claims (1)

Invention Formula A gas pressure regulator consisting of a casing containing coaxially arranged inlet and outlet pipes, connected by themselves a tuning and sensing mechanisms and a reducing nozzle with a valve of the shaft 2 And g 0 five characterized in that, in order to simplify the design and increase operational reliability by damping pressure fluctuations, the inlet is made plugged at the end and smaller diameter, the outlet is made larger, both are connected by a cone-shaped junction, two stiffening washers are installed in the outlet, deaf and perforated, dividing its cavity into the input and output chambers of vibration suppression, the input chamber being formed by a cone-shaped transition and the side surface of the output branch pipe ka, the lateral surface of the inlet nozzle j is perforated perforated and a blind washer, and the exit chamber is the side & W the surfaces of the inlet and outlet nozzles and two stiffening washers, deaf and perforated, a reducing nozzle with a valve are placed on the side surface of the inlet nozzle, and a sensitive element is located on the side surface of the output nozzle coaxially with the reducing nozzle. eight Fi.Z Phi. /