SU758086A1 - Gas flowrate regulator - Google Patents

Description

The invention relates to automatic regulation and can be used in the oil and gas industry.

Known flow regulator current 5 environment, containing the actuator associated with the command device, perceiving the pressure drop across the restriction device [ΐ].

The disadvantage of this regulator is the complexity of the design.

The closest to the technical essence of the solution is a gas flow regulator, comprising a housing with inlet and outlet nozzles and a tapering device sequentially installed in the housing cavity and a regulating body associated with the first sensing element, before and after which are connected to the cavities before and after the tapering device .

The disadvantage of this regulator is the instability of the gas flow by mass when the gas pressure at the inlet.

The purpose of the invention is to eliminate this drawback, i.e. improving the accuracy of the regulator.

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This goal is achieved by the fact that it is equipped with a second sensitive element and a profiled rod installed inside the restricting device along its axis and connected with the second sensitive element, which is connected to the cavity with constant pressure on the one hand and and the fact that the second sensitive element is designed as a Bourdon pipe.

FIG. 1 shows a structural diagram of a gas flow regulator; in fig. 2 - a possible variant of a gas flow regulator with a second sensitive element made in the form of a Bourdon tube.

The regulator includes a housing 1 with an inlet 2 and an outlet 3 with nozzles and a tapering device 4 installed afterwards in a cavity of the housing 1 and a regulator 5 connected to the first sensing element 6, cavities 7 and 8 before and after which are connected respectively to cavities 9 and 10 before and after the restriction device 4, the second sensitive element 11 and the profiled rod 12 mounted inside the restricting device 4 along its axis 30 and connected with the second sensitive

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element 11, which on the one hand is connected to the cavity with a constant pressure 13, and on the other hand - to the inlet 2. The regulating body 5 is equipped with a spring 14.

The second sensing element 11 (FIG. 1) is provided with a spring 15, a glass ³ 16, a plug 17 with a hole communicating a constant pressure cavity 13 with a constant pressure source (a constant pressure source not shown). 1®

The regulator works as follows.

• The pressure drop occurring on the constricting device 4 as the flow passes through it is perceived by the first 15th sensitive element 6 connected with the regulator 5, which changes its flow settlement depending on the magnitude of this difference. With increasing flow rate through the 20 throttling device 4, the pressure drop across it increases, which leads to a decrease in the flow area of the regulator 5, due to the action of the first sensing element 6, 25

while reducing the flow through the restriction device 4, the flow area of the regulator 5, on the contrary, increases, restoring the specified flow rate by volume.

To compensate for the instability of the flatness of the regulated gas (and the mass flow instability associated with it) due to fluctuations of the main pressure, the regulator is equipped with a second sensitive element -45. When the pressure (and density) of the controlled medium increases, the second sensitive element 11 deforms , moves the profiled rod 12 to reduce the passage section 40 of the restriction device 4, the differential on which increases, which leads to an additional reduction of the flow section of the regulator

5. When reducing the pressure (density) of the controlled medium in the line, the second sensitive element 11 by

profiled rod 12 increases the flow area of the narrowing device 4, reducing the differential on it and thereby increasing the flow through the regulator 5.

The law of variation of the flow area of the restriction device 4 is determined by the profile of the rod 12 and the force opposing its movement, which is created by the adjustable spring 15 through the glass 16.

The effectiveness of the regulator is provided by increasing the accuracy of maintaining gas flow.

Claims (2)

Claim 1. A gas flow regulator, comprising a housing with inlet and outlet nozzles and a tapering device sequentially installed in the housing cavity and a regulating member associated with the first sensing element, the cavities before and after which are connected respectively to the cavities before and after the restriction device This is due to the fact that, in order to increase the accuracy of the regulator, it is equipped with a second sensitive element and a profiled rod mounted inside the restriction device along its axis and connected with the second sensitive element. element that on the one hand is connected to the cavity at a constant pressure and, on the other hand - to the cavity of the housing. 2. Regulator pop. 1, which means that the second sensitive element is designed as a Bourdon tube.