Shaft boring machine and cutterhead thereof

Abstract

The invention discloses a shaft boring machine and its cutter head. The cutter head includes: a middle cutter head body; The arm is connected with a connecting assembly detachably connected to the middle cutter body; the middle cutter body is fixed with several bases corresponding to the folding arms one by one, any base and the corresponding folding The arms are hinged; any folding arm is provided with a supporting boss, and the base is provided with a concave positioning block fitted with the supporting boss for positioning the folding arm. The above-mentioned cutter head is connected to the middle cutter head body through the connection assembly and the fitting connection between the concave positioning block and the support boss can ensure the rigid connection of the entire cutter head, thereby ensuring the stability of the excavation; When the inner diameter is reduced after the pieces are assembled, the cutter head can be recovered smoothly, which can shorten the disassembly period to improve work efficiency, and can improve economy and personnel safety.

Description

technical field [0001] The invention relates to the technical field of boring machines, in particular to a cutterhead. The invention also relates to a shaft boring machine with such a cutter head. Background technique [0002] Shaft boring machines are widely used in shaft construction projects because of their safety and high efficiency. Shaft cutterheads are key equipment for full-section excavation of the bottom surface of shafts. When using a shaft boring machine for shaft construction, as the shaft excavation continues to deepen, the shaft wall needs to be supported. Since the inner diameter of the shaft wall support is smaller than the diameter of the cutter head, after the shaft shaft excavation is completed, The shaft cutter head cannot be hoisted from the shaft to the ground as a whole. The existing method is to design the cutter head as a multi-sided block structure, and bolt each side block through bolts to assemble a whole cutter head; However, when the shaft ...

AI Technical Summary

Problems solved by technology

However, when the shaft boring machine is excavating the shaft, most of them will use the mud conveying type to discharge the slag. During the dismantling after the shaft excavation is completed, a large amount of mud will accumulate at the bottom of the well and will gradually solidify. Part of the cutter head will be covered by mud. When the cutter head needs to remove the bolts at the joints of the blocks, it will take a lot of time to clean up the mud, which will greatly increase the difficulty of disassembling the cutter head and the dismantling period. At the same time, in the above operations During the process, the construction personnel directly entered the cutter head soil bin at the bottom of the well to work, and the safety of personnel was difficult to guarantee.

[0003] Therefore, how to avoid affecting the work efficiency and the safety of the staff due to the traditional splitting of the cutter head and lifting it out is a technical problem that those skilled in the art need to solve at present.

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