Adjustable mini underground pipeline tunneling cutter head

Abstract

The invention provides an adjustable mini underground pipeline tunneling cutter head. According to the invention, a cutter head housing is adopted to divide the soil into a soil part which is positioned inside the housing and a soil part which is positioned outside the housing, so as to facilitate the cutting operation of the soil part inside the housing without damaging the soil part outside thehousing; and the radial positions and the cutting angles of cutter blades are adjustable and the cutter blades are spirally arranged, so that the size of the cutting edge of each cutter blade can be reduced to reduce the requirement for power; the cutting forces of the individual cutter blades are controlled to be equal, so as to ensure the same stress on each group of adjustable cutter holder and fixed cutter holder, keep the overall stress in balance, provide an axial advancing force during cutting and benefit the axial advancement of the cutter head. Besides, according to the characteristics of different soil, the cutting angles of the cutter blades are adjusted to reduce the cutting resistance, reduce the wear of the cutter and ensure the mobility of the cut soil body; and the servicelife of the cutter head is increased by changing different shapes of cutters.

Description

technical field [0001] The invention relates to the technical field of underground pipeline excavation, in particular to an adjustable miniature underground pipeline excavation cutter head. Background technique [0002] At present, small-diameter pipes such as urban water pipe networks and heat pipes are usually built by slotting and laying, and this construction method is likely to have an impact on ground traffic. Trenchless laying of underground pipeline construction technology is a construction technology for laying public pipelines such as water supply, gas, natural gas, sewage, telecommunication cables, etc. without digging trenches on the surface and with minimal damage to the stratum structure. [0003] The excavation cutter head of underground pipeline is an important technology in the construction technology of laying underground pipelines without excavation, but the existing excavation cutter head is mainly used on large shield machines for tunnel excavation. , t...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects in the prior art that the cutter head seriously damages the soil layer, the power requirement is large, and it cannot adapt to different soil conditions, the present invention proposes an adjustable miniature underground pipeline excavation cutter head, and its technical solution is:

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