SU1595536A1 - Fire barrier - Google Patents

Abstract

The invention relates to the gas industry, can be used as a flame arrestor and allows to increase the reliability of the flame arrestor at low speeds and pressures of combustible gas. The arrester consists of body 1, cover 2, outer 3 and inner 4 pipes. The outer tube 3 has side holes 5 in the upper part, and a flange 6 in the bottom part, to which the membrane is pressed through the ring 7. The walls of the housing, the outer and inner tubes form a loop channel. A separating ring 9 is welded to the lower end of the inner tube 4 with a gap of 2-3 mm relative to the outer tube 3. The cavity between the membrane and the lower end of the inner tube is filled with liquid. A bottom cover is attached to the housing 1, having a seat 11 in which a rubber reinforced check valve 12 is installed. The inlet and outlet of the gas in the flame arrester are through the inlet 13 and outlet 14 of the nozzles. 1 il.

Description

The invention relates to the gas industry, can be used as a flame arrestor and allows you to increase the reliability of the arrester at low speeds and pressures of combustible gas. Flame arrester consists of a body

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1, cover 2, outer 3 and inner 4 glasses. The outer Cup 3 has in the upper part of the side holes 5, and in the lower flange 6, to which the membrane is pressed through the ring 7. The walls of the housing, outer and inner glasses form a loopback channel. A separating ring 9 is welded to the bottom end of the inner cup 4 with a gap of 2-3 mm relative to the outer cup. The cavity between the membrane and the lower end of the inner tube is filled with liquid. To the housing 1 is attached to the lower cover, having a saddle 11, which has a check valve 12, reinforced with rubber. The entrance and exit of gas in the flame arrester are carried out through the inlet 13 and outlet 14 of the nozzles. 1 il.

5Ts „„ 1595536 A1

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The invention relates to the gas industry and can be used as a flame arrester of pipelines and tanks with explosive gas.

The aim of the invention is to improve the reliability of the arrester,

The drawing shows the arrester, cut.

The arrester includes a housing 1 arrester, to the end of which the lid 2 is welded, on which the outer 3 and inner 4 cups are fixed; The outer cup in the upper part has openings 5 for the passage of gas, and in the lower flange 6, to which the elastic bottom 8 is pressed through the ring 7,

The walls of the housing 1 outer 3 and inner 4 glasses form a loop channel,

A separating ring 9 is welded to the lower end of the inner cup with a gap of 2-3 mm around the perimeter relative to the outer cup. The cavity above the bottom of the glass 3 to the lower end of the inner glass is 15-20 mm, filled with liquid 10. To the housing 1 by means of bolts through the gasket is attached the bottom cover, having a saddle 11, in which a check valve 12 is installed, reinforced with rubber to ensure a tight fit in the saddle . The entrance and exit of gas in the flame arrester is carried out through the inlet 13 and outlet 14 of the nozzles,

The arrester operates as follows.

During normal operation of the flame arrester, the gas through the inlet pipe, lifting the check valve 12, enters the space under the elastic bottom of the glass 3. Passing between the wall of the housing and the outer glass 4, the gas through the holes 5 enters the cavity between the outer and inner glasses. Then, through the gap between the ring, welded to the lower end of the inner cup and outer cup, it acts on a layer of liquid, bleeds through it, flows through the inner cup to the outlet nozzle and is consumed.

When a gas explodes in a pipeline or at a consumer, a shock wave or gas combustion flows in the opposite direction and, passing through the outlet 14 and the inner cup 4, acts on the liquid layer and the elastic bottom 8 below it. In the case of detonation gas burning, accompanied by a significant excess pressure, the elastic bottom 8 moves sharply downward and, acting on the check valve 12, clogs it in the saddle 11, at the moment of the impact of the shock wave, the liquid layer discharges into the cavity between the inner and outer Anami. Simultaneously, the blast wave passes through the gap between the ring 9 and the outer glass 3, then along the cavity between the inner and outer glasses, hole 5 and the cavity between the outer glass and the body and approaches the non-return valve at the moment when the latter is tightly packed into the saddle. As a result, the combustion process is localized. If the back stroke is accompanied by a slow burning of gas with a slight increase in pressure, then the localization of the combustion process is carried out by a liquid layer.

The flame arrester provides localization not only of the detonation burning of acetone, but also of slow flame propagation, accompanied by a slight increase in pressure. It can be used to protect pipelines and apparatus with explosive gases - acetylene substitutes. In addition, it has smaller dimensions and weight. Easy to manufacture and maintain.

Claims (1)

Claim A flame arrestor, comprising a housing with a lid, inlet and outlet nozzles, a flame retardant element made in the form of coaxially installed and forming a loop channel of the inner cup and outer with an elastic bottom and openings in its side surface and a valve, characterized in that reliability of fire protection, it is equipped with a separating ring installed between the cups on the lower end of the inner one with a gap relative to the outer one, while the cavity between the separating ring and the elas The liquid bottom is filled with liquid.