A double-pipe ventilation device for limited space operation and its working method

Abstract

The invention discloses a double-pipe ventilation device for limited space operation and its working method, which comprises a floating island mechanism, an air blowing mechanism, an air extraction mechanism and a first monitoring mechanism; the first air outlet end of the blowing mechanism is connected with the floating island mechanism When the double-pipe ventilation device in a limited space is in use, the first air intake end of the air blowing mechanism is arranged outside the limited space, the first air outlet end of the air blowing mechanism extends into the limited space and communicates with the floating island mechanism, and the air extraction mechanism The second air outlet end is arranged outside the limited space, and the second air intake end of the air extraction mechanism extends into the limited space. In the present invention, the device can fully agitate and extract the gas in the limited space, and at the same time quickly and effectively replace the fresh air in the atmosphere into the limited space, ensuring the life safety of operators and rescuers in the limited space. The structure of the device It is simple, easy to operate, easy to be widely promoted, and can greatly reduce the chance of death of workers in limited spaces.

Description

technical field [0001] The invention belongs to the technical field of equipment and equipment for limited space operations and emergency rescue, and particularly relates to a double-pipe ventilation device for limited space operations and a working method thereof. Background technique [0002] On February 15, 2019, a papermaking company in Dongguan City fainted while working in a limited space while cleaning a sewage tank. Some people participated in the rescue, resulting in a major incident of 7 deaths. In less than three months, there have been many similar fatal accidents in limited spaces. There are more than 100 similar fatal accidents every year. Tracing it to its cause can have many kinds, but the most fundamental reason is that in the sewage pool, the air in the limited space has poisonous and harmful gases or poor air lack of oxygen, which is the main cause of death accidents. If the air in the limited space of the sewage pool is a normal human body can breathe a...

AI Technical Summary

Problems solved by technology

[0009] However, the ventilator disclosed in the above-mentioned utility model penetrates into the limited space operating range through a single hose, blows normal air in the atmosphere into the limited space, and cannot extract the bad gas that is heavier than air in the bottom layer in the limited space. There are still toxic and harmful gases or poor air lacking in oxygen

Once the air in the confined space stops flowing or the flow is weakened or the bad air is not completely replaced, or there is a continuous source of harmful gas leakage, the bad air will cause the workers to breathe and cause casualties.

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