RU2364914C1 - Gas pressure regulator - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: gas pressure regulator belongs to gas industry and may be used for gas pressure lowering. The gas pressure regulator contains gas inlet with initial parametres, body, low pressure gas outlet, de Leval nozzle. De Leval nozzle is fitted into the body so that inlet part of the nozzle communicates with body internal space and outlet part of the nozzle is connected with low pressure gas outlet.

EFFECT: providing effective device operation.

3 dwg

Description

The invention relates to the gas industry and can be used to reduce the gas pressure required by the consumer.

An analog of a device of the same purpose to the claimed invention, by a combination of features, is a gas pressure regulator, including a gas supply pipe with initial parameters, a housing, a throttling valve, a low pressure gas pipe (see Kyazimov K.G. Operation and repair of underground gas pipelines. - M .: Stroyizdat, 1981, p. 264, fig. 63, figure 1)

The reasons that impede the achievement of the technical result indicated below when using a similar pressure regulator include the fact that the pressure is regulated by a throttle valve, which leads to a decrease in gas temperature after regulation and requires additional costs for preliminary (before throttling) gas heating.

The closest device of the same purpose to the claimed invention in terms of features is a device for reducing gas pressure (USDG), including a gas supply pipe with initial parameters, a housing, a low-pressure gas pipe (see Pat. RF No. 2226709. Device for reducing pressure gas (USDG) / Kovalnogov N.N., Zhukhovitsky D.L., Tsynaeva A.A. Bul. No. 10 of 04/10/2004) and adopted as a prototype.

For reasons that impede the achievement of the technical result indicated below when using a known device adopted as a prototype, the known device regulates the gas pressure at a constant temperature for certain characteristics of the vortex tube, which leads to a decrease in the efficiency of the regulator when changing the parameters of the device.

The essence of the invention is to prevent hypothermia of the elements of the device and its effective operation.

The technical result is ensuring the effective operation of the device.

The specified technical result during the implementation of the invention is achieved by the fact that in the proposed gas pressure regulator containing a gas supply pipe with initial parameters, a housing, a low pressure gas discharge pipe, the feature is that the controller is equipped with a Laval nozzle placed inside the housing so that the input part of the nozzle communicates with the interior of the casing connected to the gas supply pipe with initial parameters, and the output part of the nozzle is connected to the low pressure gas pipe.

The drawings show:

figure 1 is an analogue of a gas pressure regulator;

figure 2 is a prototype gas pressure regulator;

figure 3 - the proposed gas pressure regulator.

Information confirming the possibility of carrying out the invention with obtaining the above technical result are as follows.

The gas pressure regulator comprises a gas supply pipe 1 with initial parameters, a housing 2, a low pressure gas discharge pipe 3, a Laval nozzle 4 placed inside the housing 2 so that the inlet part of the nozzle 4 communicates with the interior 5 of the housing 2 connected to the supply pipe 1 gas with initial parameters, and the output of the nozzle 4 is connected to the pipe 3 of the low-pressure gas outlet.

The work of the proposed pressure regulator is as follows.

The principle of operation of the proposed gas pressure regulator is based on the implementation of the process of gas-dynamic temperature stratification of the flow. The flow of high pressure gas is directed through the pipe 1 of the gas supply with the initial parameters into the housing 2. After reducing the gas pressure in the device, the low pressure gas is removed through the pipe 3 of the low pressure gas outlet. In the Laval nozzle 4, the inlet of which communicates with the interior space 5 of the housing 1, the gas flow is accelerated with a decrease in pressure, the speed of which becomes greater than the speed of sound. Moreover, in the inner space 5 of the housing 1, the high-pressure gas moves at a subsonic speed. It is known that the angular momentum near the wall in a supersonic gas stream due to the work of friction forces passes into heat, which is removed due to the mechanisms of heat conduction. Provided that the amount of heat removed from the wall due to thermal conductivity becomes greater than the supplied heat due to friction (the criterion Pr <1, typical for natural gas), the gas temperature is redistributed in the supersonic gas flow. This, with an increase in the supersonic flow rate, leads to a decrease in the reduction temperature and to heat transfer from the high-pressure subsonic flow to the low-pressure supersonic flow. Thus, the gas pressure is reduced practically without a decrease in its temperature.

Claims (1)

A gas pressure regulator comprising a gas supply pipe with initial parameters, a housing, a low pressure gas pipe, characterized in that the controller is equipped with a Laval nozzle placed inside the body so that the inlet of the nozzle communicates with the interior of the body connected to the gas pipe with initial parameters, and the outlet of the nozzle is connected to the low-pressure gas outlet pipe.

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