CN102434197A - Automatic pressure relief device of refuge chamber or rescue capsule - Google Patents

Abstract

The invention relates to an automatic pressure relief device of a refuge chamber or a rescue capsule, which is suitable for automatic pressure relief for maintaining the positive pressure of internal air of the underground refuge chamber or the underground rescue capsule in a coal mine. The automatic pressure relief device comprises an upper drum and a lower drum connected with an annular plate, a flange disc connected with an external ventilation pipeline of the refuge chamber is arranged at the bottom of the lower drum, an air cylinder is arranged in the lower drum and is internally provided with a piston, the edge of the upper end of the piston is propped against a lower annular opening of the annular plate, an O-ring is arranged between the edge of the upper end of the piston and the lower annular opening of the annular plate, and a traction wire rope is arranged at the middle of the piston. A vent hole is arranged at the lower part of the upper drum, the upper part of the upper drum is provided with a pulley for hanging the traction wire rope, and a counterweight is arranged on the traction wire rope hung on the pulley. The automatic pressure relief device of the refuge chamber or the rescue capsule, disclosed by the invention, has the advantages of capabilities of automatically regulating the positive pressure of the interior of the refuge chamber or the rescue capsule to be in a range of 100-300Pa and simultaneously resisting the impaction of outside shock waves, simple structure, convenience for using, flexibility, reliability, low manufacturing cost and good using effect.

Description

An automatic pressure relief device for a refuge chamber or rescue cabin

technical field

The invention relates to an automatic pressure relief device, in particular to an automatic pressure relief device for a refuge chamber or a rescue chamber suitable for maintaining positive air pressure inside a coal mine refuge chamber and rescue chamber.

Background technique

About 95% of China's coal mines are mines mined by underground workers. Underground mining mines have the characteristics of concentrated disaster factors, limited personnel movement and escape space, and the coexistence of multiple disaster-causing factors underground, which is also prone to major disasters. For this reason, the "Notice of the State Council on Further Strengthening Enterprise Safety Production Work (Guo Fa [2010] No. 23)" and "The State Administration of Work Safety and the National Coal Mine Safety Supervision Bureau's Notice on Building and Perfecting the Six Major Systems for Underground Coal Mine Safety and Avoidance ( Safety Supervisor Zongmeizhuang [2010] No. 146) requires coal mines to build and improve six major safety and risk avoidance systems: monitoring and monitoring system, underground personnel positioning system, emergency avoidance system, compressed air self-rescue system, water supply rescue system, and ventilation communication system.

Refuge chambers and rescue cabins are emergency escape facilities that provide basic living conditions for those in distress who cannot safely evacuate to the ground, and are an effective measure in coal mine emergency rescue. When a mine disaster occurs, all miners will arrive at the refuge chamber at different times, and the explosion-proof door of the refuge chamber will be opened many times. If the mine refuge chamber is not under positive pressure, each opening and closing of the door will cause poisonous and harmful Gas enters the interior of the refuge chamber. Therefore, in order to isolate from the external harmful gas environment and prevent toxic and harmful gases such as external CO from entering the room, it is necessary to maintain a positive pressure state inside the refuge chamber relative to the external environment in order to effectively ensure the safety of the refuge chamber.

The positive pressure value of refuge chambers in foreign countries is usually controlled at 200 Pa to 300 Pa, and the relevant regulations in my country stipulate that the positive pressure of refuge chambers should be maintained above 100 Pa. Therefore, in addition to ensuring a certain positive pressure in the room, the refuge chamber (rescue cabin) must also be able to resist the impact of the explosion shock wave outside the refuge chamber or rescue cabin, and ensure that the interior of the refuge chamber (rescue cabin) is free from damage from the explosion shock wave. . That is to say, in addition to maintaining the positive pressure state inside the refuge chamber or rescue cabin, it is also necessary to be able to resist the impact of the explosion shock wave. At present, mine refuge chambers or rescue cabins mainly rely on manual pressure relief valves to release pressure to maintain positive atmospheric pressure. The efficiency is low, and it is difficult to ensure normal positive atmospheric pressure. Automatic pressure relief device for refuge chamber or rescue cabin.

Contents of the invention

Technical problem: The object of the present invention is to solve the problems existing in the prior art, and provide an automatic pressure relief device for refuge chambers or rescue chambers with simple structure, high safety, and time-saving and labor-saving.

Technical solution: The automatic pressure relief device for refuge chambers or rescue cabins of the present invention includes an upper cylinder and a lower cylinder connected by an annular plate, and the bottom of the lower cylinder is provided with an external ventilation pipeline leading to the refuge chamber or rescue cabin Connected flanges, a cylinder is provided in the lower cylinder, a piston is provided in the cylinder, the upper edge of the piston is against the lower ring mouth of the annular plate, an annular sealing ring is provided in between, and a traction wire rope is provided in the middle of the piston; The lower part of the upper cylinder is provided with a ventilation hole, and the upper part is provided with a pulley for hanging the traction wire rope, and the traction wire rope suspended on the pulley is provided with a counterweight.

The counterweight is 0.25Kg heavier than the piston; the upper and lower cylinders, cylinders, pistons, and annular plates are all made of stainless steel.

Beneficial effects: the invention can automatically adjust the positive pressure inside the refuge chamber or rescue cabin between 100Pa and 300Pa, and at the same time resist the impact of external shock waves, so that the refuge chamber or rescue chamber is always in a safe positive pressure environment. The invention communicates with the outside atmosphere of the refuge chamber or rescue cabin through the ventilation pipe, and when the atmospheric pressure inside the refuge chamber or rescue chamber is more than 300 Pa higher than the outside, it will automatically open and start to release the pressure, so that the indoor atmospheric pressure will slowly decrease; When the pressure difference between the inside and outside of the chamber or rescue chamber drops to less than 100Pa, it will automatically close and stop the pressure relief, so that the indoor atmospheric pressure will rise slowly. So repeatedly, always keep the positive pressure inside the refuge chamber or rescue cabin between 100Pa and 300Pa. The utility model has the advantages of simple structure, convenient use, flexibility and reliability, low manufacturing cost, good use effect and wide practicability.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1-upper cylinder; 2-air vent; 3-piston; 4-cylinder; 5-lower cylinder; 6-pulley; 7-traction wire rope; 8-weight; 9-ring plate; 10-method Orchid plate.

Detailed ways

An embodiment of the present invention is described below in conjunction with accompanying drawing:

The automatic pressure relief device for refuge chamber or rescue chamber of the present invention is mainly composed of upper and lower cylinders, cylinders, pulleys 6, traction wire ropes 7, and counterweights 8. The upper cylinder 1 is welded together with the lower cylinder 5 through the annular plate 9. , the bottom of the lower cylinder 5 is provided with a flange 10, the flange 10 is connected with the external atmospheric ventilation pipeline leading into the refuge chamber or the rescue cabin, the lower cylinder 5 is provided with a cylinder 4, and the cylinder 4 is provided with a There is a hollow piston 3, the upper edge of the piston 3 leans against the lower ring mouth of the ring plate 9, and there is an annular sealing ring in between. When the piston 3 leans against the lower ring mouth of the ring plate 9, the pressure will be released automatically The device is sealed. The middle part of the piston 3 is provided with a traction wire rope 7; the lower part of the upper cylinder 1 has a square air hole 2, the upper part of the upper cylinder 1 is provided with a pulley 6 for hanging the traction wire rope 7, and the top is provided with a cover plate, and the pulley 6 is fixed by the axle On the cylinder wall of the upper cylinder 1, the traction wire rope 7 suspended on the pulley 6 is provided with a counterweight 8 matched with the piston 3, and the counterweight 8 is 0.25Kg heavier than the piston 3; the upper and lower cylinders 1,5, cylinder 4, piston 3, annular plate 9 are all made of stainless steel.

Working principle: When the positive pressure in the refuge chamber or rescue cabin is greater than 300Pa, the atmospheric pressure in the refuge chamber or rescue cabin pushes the piston 3 to move downward, so that the internal and external air passages of the refuge chamber or rescue cabin are connected, and the indoor gas When the positive pressure in the room drops to less than 100Pa, the counterweight 8 pulls the piston 3 to move upward. When the piston 3 moves to the uppermost part, its upper edge is against the lower ring mouth of the ring plate 9. , the automatic pressure relief device is closed, and the indoor pressure begins to rise gradually. So repeatedly, always keep the positive pressure inside the refuge chamber or rescue cabin between 100Pa and 300Pa. Because the piston 3 is made of stainless steel, it can withstand the impact of external shock waves, effectively protecting the safe use of the refuge chamber or rescue cabin.

Claims (3)

1. refuge chamber or survival capsule automatic decompression device; It is characterized in that: it comprises upper shell (1) and the lower shell (5) that links to each other through annular slab (9); Lower shell (5) bottom is provided with and leads to the flange (10) that refuge chamber or survival capsule aeration pipe outside road link to each other; Be provided with cylinder (4) in the lower shell (5), be provided with piston (3) in the cylinder (4), the upper end-face edge of piston (3) leans the following collar extension place at annular slab (9); Between be provided with O-ring seal, the middle part of piston (3) is provided with haulage cable (7); The bottom of upper shell (1) has air vent (2), top is provided with the pulley (6) that hangs haulage cable (7), and the haulage cable (7) that is suspended on the pulley (6) is provided with counterweight (8).

2. refuge chamber according to claim 1 or survival capsule automatic decompression device is characterized in that: described counterweight (8) is than the heavy 0.25Kg of piston (3).

3. refuge chamber according to claim 1 or survival capsule automatic decompression device is characterized in that: described upper and lower cylindrical shell (1,5), cylinder (4), piston (3), annular slab (9) are Stainless Steel and process.

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