SU709894A1 - Safety valve - Google Patents

Description

(54) SAFETY VALVE

one

Isofetenation is in the field of chemical engineering and can be used as a protective device for mobile-acetylene generators, pipelines and tanks with explosive gas.

Protective devices are known that divide, according to the 1FINCEUR, the work on liquid and liquidless ones, which contain a pressure chamber, an office valve and a loop pipe connecting the pressure chamber to the collector l.

The disadvantage of this type of device is that when the pressure drops below an acceptable level, they lose their ability to work. In addition, they do not allow operation at low temperatures due to the freezing of the liquid and can skip the back stroke when filling the liquid, which is possible with high flow rates of the gas passing through them.

The closest devices to the technical essence is a barrier to detonation and explosive burning G2. It contains a pressure chamber, a shut-off valve, a loop pipe connecting the pressure chamber with a manifold, and an annular chamber with a ring valve that closes against the pressure force of the liquid, which is perceived by the pressure of the gas that increases with the explosion.

However, due to the presence of liquid in it, the device requires monitoring of its level and does not work at low temperatures because of its implantation. It has a complex structure, and the presence of a loopback pipeline significantly increases its dimensions.

The aim of the invention is to reduce the size of the safety valve.

Claims (2)

This is achieved by the fact that the proposed safety valve has a loop pipe made at the ends of the two halves of the body in the form of a caiad, for example in the form of a helix, and in the half of the body the channel is a mirror display in the other half, and the booster chamber is separated from the collector by a membrane . As a result, the channel coils are arranged in two levels and each coil in the upper part of the body is located exactly above the corresponding coil in the lower part of the body, with the total channel length providing a blast wave delay for the time required to close the non-return valve. Fig. 1 shows the proposed safety valve in the section; in fig. 2 the same section along A-A in FIG. Ij in FIG. 3 is the same section along BB in FIG. 1. The valve has a cylinder housing consisting of the upper part 1 and the lower part 2, interconnected by means of bolts. An elastic membrane 3 with a conical pusher 4 serves as a sealing gasket between them. The gas-conducting channel in the upper and lower parts of the body has the form of spiral channels 5 and 6, while the channel in one half of the body is a mirror image of the channel in the other half. The plenum chamber 7 and the outlet spout 8 are located in the upper half of the housing. In the lower half there is an inlet 9, a manifold 10 and a check valve 11 having a guide rod and a hemispherical head. The valve is covered with a rubber jacket to ensure a tight fit on the saddle. The safety valve operates as follows. During normal operation of the valve, gas through the inlet 9 enters the collector 10, depressing the check valve 11. From the collector, gas goes to the lower spiral channel 6, passes through its turns and then passes through the connecting hole in the membrane 12, enters the upper spiral channel 5, from which through the chamber 7 and the outlet fitting 8 goes into the pipeline for consumption (gas flow is shown in Fig. 1 by arrows). When a gas explodes in a pipeline or at a consumer, a shock wave enters the pressurized chamber 7 via outlet plug 8. The check valve 11 closes as the diaphragm is pressed down by the action of a blast wave, hits the valve with a conical pusher 4. Next, the return wave goes through the upper channel 5 through the connecting hole 12, passes into the 1st spiral channel 6 and enters the collector 10 already after shrinking check valve 11, additionally clamping it. Claims The safety valve, the casing of which is divided into two pressure chambers and a manifold connected by a loopback pipe, is equipped with a check valve, characterized in that, in order to reduce overall dimensions, the loop pipe is formed at the ends of the two halves of the casing as a channel, for example in the form of a spiral wherein the channel in one half of the housing is a mirror image in the other half of the housing, and the pressure chamber is separated from the collector by a memphana. Sources of information taken into account during the examination 1. USSR author's certificate No. 508631, cl. F 16 K 47 / GS, 1972. 2. USSR author's certificate number 2O0533, cl. F 16 K 47 / O2, 1966 (prototype). L V 6 5 BUT-/( / 2 ful.f Bb Fig 2 .S