RU113382U1 - GAS REGULATORY ITEM - Google Patents

Abstract

Gas control station, consisting of an inlet gas pipeline with a valve, self-recording and indicating pressure gauges, a bypass gas pipeline (bypass), a filter, a safety shut-off valve, a pressure regulator, an outlet valve, a safety relief valve, characterized in that a shut-off valve is installed in front of the gas control station, controlled by the control unit from a pressure sensor having an electrical output and installed at the outlet of the gas control point.

Description

Known gas control point (hydraulic fracturing), consisting of a dashboard, having a self-recording and showing pressure gauges, gas equipment of the main line with an inlet valve, filter, safety - shut-off valve, pressure regulator, outlet valve, water lock [P. Litvinenko. Fitter for the maintenance of gas equipment of industrial enterprises. M .: "Nedra", 1974, 272 p. Golyanov A.I. Gas networks and gas storages; Textbook for high schools. - Ufa: LLC Publishing house of scientific and technical literature "Monograph", 2004. - 303 p.]

Well-known hydraulic fracturing, consisting of a dashboard, having self-recording and showing pressure gauges, a bypass gas pipeline (bypass), equipped with two valves, gas equipment of the main line having an inlet valve, a filter, a safety shutoff valve, a pressure regulator, an outlet shutter, a safety relief valve [Kyazimov K.G. The basics of gas economy - M .: Higher. school., 1987. - 335 S.], taken as a prototype.

The disadvantage of hydraulic fracturing is the low reliability of operation of the safety shut-off valve when the pressure increases (decreases) after the pressure regulator due to irregular membrane lethargy 12 (Fig. 72. Kyazimov KG Fundamentals of gas economy - M .: Higher school, 1987 - 335 s), insufficiently precise adjustment of the operation of the safety shut-off valve by service personnel, etc., as a result of which gas is supplied to consumers by 25% or lower than 20% of the working pressure from consumers, due to which flame detachment on the burners is possible, gassed st premises and the occurrence probability of ignition gas mixture formed in consumers or slip flame burners consumer gas equipment.

The objective of this utility model is to increase the reliability of hydraulic fracturing.

The problem is solved by a gas control point, consisting of an inlet gas pipeline with a valve, a self-recording and indicating pressure gauge, a bypass gas pipeline (bypass), gas equipment of the main line, which has a filter, a safety - shutoff valve, a pressure regulator, an outlet valve, a safety - relief valve, characterized in that in front of the gas control point there is a shut-off valve controlled by the control unit from a pressure sensor having an electrical outlet and installed at the gas control outlet yatornogo points.

The essence of the utility model is illustrated by drawing 1, which shows the hydraulic fracturing containing an inlet gas pipeline 1 with a valve 2, a recording 8 and showing 9 gauges, a gas bypass (bypass) 7, a filter 3, a safety-shut-off valve 5, a pressure regulator 6, a safety-relief valve valve 4, pressure sensor 10, control unit 12, shut-off valve 11.

The principle of hydraulic fracturing is as follows; when the pressure rises above the permissible one by 15%, the safety - relief valve 4 is triggered, if the pressure nevertheless continues to grow and reaches P> Prab ∗ 1.25, then the safety - shutoff valve 5 should work and shut off the gas supply to consumers. If this does not happen, then the high-pressure gas is supplied to consumers, due to which there is a flame separation on the burners, gas contamination of the rooms and the occurrence of a probability of ignition of the formed gas-air mixture at the consumer. In the event that the pressure at the hydraulic fracturing outlet is lower than permissible, a flame may slip on the burners of the gas-consuming equipment of consumers.

In order to prevent such situations, a shut-off valve 11 is installed in front of the hydraulic fracturing, and a pressure sensor 10 is installed at the output of the hydraulic fracturing, which is set to a higher pressure than the upper pressure of the safety-shut-off valve 5 (depending on the installed gas equipment for consumers). When the specified pressure is reached, the pressure sensor 10 sends a signal to the control unit 12, which processes a signal to close the shut-off valve 11 and stop the supply of high pressure gas to consumers.

In addition, in order to prevent flame penetration on the burners of consumers when the gas pressure drops below acceptable values, the pressure sensor 10 is adjusted to a pressure below the lower pressure of the safety valve 5 (depending on the installed gas equipment for consumers) and, when the specified pressure is reached , the pressure sensor 10 provides a signal to the control unit 12, which also processes a signal to close the shut-off valve 11 and stop the supply of reduced pressure gas to consumers.

Claims (1)

A gas control station, consisting of an inlet gas pipeline with a gate valve, self-recording and indicating pressure gauges, a bypass gas pipe (bypass), a filter, a safety shut-off valve, a pressure regulator, an outlet valve, a safety relief valve, characterized in that a shut-off valve is installed in front of the gas control point, controlled by the control unit from a pressure sensor having an electrical outlet and installed at the outlet of the gas control point.