Air cooling device for secondary ventilation cooling of shield tunneling machine and working method of air cooling device

Abstract

The invention relates to an air cooling device for secondary ventilation cooling of a shield tunneling machine and a working method of the air cooling device, and belongs to the technical field of engineering construction. The air cooling device comprises a shield tunneling machine frame. A secondary ventilation cooler and a compression and condensation unit are mounted on one side of the shield tunneling machine frame and are connected through an anti-vibration hose. An air inlet pipeline and an air supply pipeline are arranged at the top of the shield tunneling machine frame, the air inlet pipeline is connected with an air inlet on the secondary ventilation cooler, and the air supply pipeline is connected with an air outlet on the secondary ventilation cooler. Multiple compressors are included in the compression and condensation unit and are connected in parallel, and each compressor is provided with a refrigerating circulating system independently matched with the compressor. According to the air cooling device, multi-machine running is adopted, the equipment running reliability is greatly improved, air cooling cannot be influenced when any refrigerating system breaks down, system stability is improved, the energy efficiency ratio of the unit is high, and meanwhile the running cost is reduced.

Description

technical field [0001] The invention relates to an air cooling device for secondary ventilation cooling of a shield machine and a working method thereof, belonging to the technical field of engineering construction. Background technique [0002] In the prior art, a shield tunneling machine is a construction and excavation machine for underground tunneling under the ground. It is a steel structure that can support formation pressure and advance in the formation. At present, the tunnels constructed by the shield method are mainly used for underground work such as underwater highway tunnels, subway interval tunnels, municipal pipeline tunnels, and drainage tunnels. The shield includes a head, a body and a shield tail. Behind the shield tail is a multi-section frame, and the work area for workers is mainly in the shield tail space and the frame. [0003] During the shield construction process, the temperature in the working environment is high in the working area and in the tun...

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Problems solved by technology

[0006] The shield machine construction cooling system in the above-mentioned patent uses chillers to cool the circulating water into chilled water, and introduces the chilled water into the surface cooler to cool the wind in the ventilation channel, thereby cooling the shield machine construction environment, while the circulating water It can also be cooled by heat exchange with the cooling tower, thereby transferring the heat in the construction environment of the shield machine to the outside, which can obviously alleviate the degree of humidity in the construction environment, and solve the poor cooling effect of the cooling system of the shield machine in the prior art However, it is still a stand-alone operation, the equipment power is large, the unit starting current is relatively large, the requirements for power distribution are high, and the reliability of equipment operation is low. Once the refrigeration system fails, it will affect the overall operation

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