Smoke exhaust device for shield under-pressure cabin entry fire operation

Abstract

The invention provides a smoke exhaust device for shield under-pressure cabin entry fire operation. The smoke exhaust device comprises an in-cabin hose, an in-cabin gas absorption end, a hose connecting pipe, a first gate valve, a second gate valve, an out-cabin hose and an automatic gas supplementing system pipeline. The in-bin hose is arranged in a material bin of a shield tunneling machine, thetwo ends of the in-bin hose are connected with the in-bin gas absorption end and one end of the hose connecting pipe respectively, the other end of the hose connecting pipe is connected with one endof the out-bin hose, and the other end of the out-bin hose is placed in accumulated water at the shield tail of the shield tunneling machine; the hose connecting pipe is arranged on the end wall, awayfrom the excavation bin and the air cushion bin, of the material bin; a first gate valve and a second gate valve are respectively arranged at the connecting parts of the hose connecting pipe and theintra-bin hose and the out-bin hose, one end of the automatic air supplementing system pipeline is arranged in the air cushion bin, and the other end is communicated with air outside the bin. The device is simple in structure, convenient to use, practical and capable of discharging smoke generated during operation in time, guaranteeing the stability of a tunnel face and guaranteeing the personal safety of operators.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering construction, and in particular relates to a smoke exhaust device for hot work in a shield belt press-in bin. Background technique [0002] Shield tunneling operations are carried out in strata with poor geology or abnormally rich groundwater. Abnormal parameters often occur during the tunneling process, and tool replacement operations need to be carried into the warehouse with pressure. When the tool cannot be removed and replaced by conventional means, hot work such as cutting and grinding the damaged parts must be carried out under pressure. In a high-pressure environment, and it is a closed and narrow space, hot work will produce a large amount of harmful exhaust gas, dust and smoke. These harmful substances are extremely harmful to the health of operators. When the concentration is too high, they may even cause poisoning and suffocation to death. Therefore, there is a great pote...

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Problems solved by technology

[0002] Shield tunneling operations are carried out in strata with poor geology or abnormally rich groundwater. Abnormal parameters often occur during the tunneling process, and tool replacement operations need to be carried into the warehouse with pressure. When the tool cannot be removed and replaced by conventional means, hot work such as cutting and grinding the damaged parts must be carried out under pressure. In a high-pressure environment, and it is a closed and narrow space, hot work will produce a large amount of harmful exhaust gas, dust and smoke. These harmful substances are extremely harmful to the health of operators. When the concentration is too high, they may even cause poisoning and suffocation to death. Therefore, there is a great potential safety hazard, which needs to be eliminated in time

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