Shield tunneling machine and soil bin stirring device thereof

Abstract

The invention discloses a shield tunneling machine and a soil bin stirring device. The soil bin stirring device comprises a driving shaft arranged on a cutterhead back plate, an impeller seat rotatably arranged on the driving shaft, at least two impeller arms hinged to the impeller seat and a transmission wheel fixedly arranged on the driving shaft in a sleeving manner, and the transmission wheel is meshed with meshing teeth arranged on the impeller arms. When the driving shaft rotates in the forward direction, the driving shaft drives all the impeller arms to synchronously rotate in the forward direction in the circumferential direction relative to impellers through the transmission wheel, all the impeller arms are opened, and the impeller arms stir slag slurry in a bin; and when the driving shaft rotates reversely, the driving shaft drives all the impeller arms to rotate synchronously and reversely in the circumferential direction relative to the impeller seat through the transmission wheel, all the impeller arms are folded when the impeller arms are not needed or the slag slurry is subjected to small-radius low-frequency stirring, and all parts can be detached from the cutterhead back plate conveniently. By means of the shield tunneling machine and the soil bin stirring device, the disturbance effect on the slag slurry is improved by prolonging the length of the impeller arms, the disturbance effect on the slag slurry is further improved in the process that the impeller arms execute the opening or folding action, and the slag slurry circulation efficiency is improved.

Description

technical field [0001] The invention relates to the field of tunneling equipment, in particular to a shield machine and an earth bin stirring device thereof. Background technique [0002] The shield tunneling method has the advantages of fast excavation speed, little impact on ground traffic and facilities, and low construction interference and noise, making it the mainstream construction method for urban tunnel construction. During shield tunneling construction, in order to ensure the quality and safety of tunnel construction, large-diameter or super-large-diameter inter-controlled mud-water balance shield machines are often used for construction. This type of shield tunneling machine is equipped with an atmospheric cutter head, and the back of the atmospheric cutter head is usually equipped with a soil bin stirring device to stir and disturb the slurry in the excavation bin to improve the fluidity of the slurry. [0003] However, the existing atmospheric cutter head is we...

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Problems solved by technology

[0003] However, the existing atmospheric cutter head is welded at a specific position and can only rotate with the low-speed rotating cutter head to perform constant-speed stirring in a specific area. The stirring radius is fixed, the overall stirring disturbance effect is poor, and the mud circulation efficiency is low.

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