Self-traveling mini underground pipeline tunneling machine

Abstract

The invention provides a self-traveling mini underground pipeline tunneling machine. According to the invention, the radial positions and the cutting angles of cutter blades in a cutter head mechanism are adjustable, and the cutter blades are spirally arranged, so as to reduce the size of the cutting edge of each cutter blade and reduce the requirement for power; and the individual groups of adjustable cutter holders and fixed cutter holders are subjected to the same stresses, so as to 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 thecutter, ensure the mobility of the cut soil body and increase the service life of the cutter head. A chain tension mechanism is arranged inside a traveling mechanism to tension chains. Parallel frames are moved in parallel by using a regulating mechanism, so as to achieve the function of automatically controlling the distance between two parallel frames according to the degree of looseness of thesoil and ensure the chains to be in contact with the soil all the time. Accessory chains are adopted to ensure the chains to be in effective contact with the soil during the motion, so as to produce enough advancing force.

Description

technical field [0001] The invention relates to an underground pipeline excavation technology, in particular to a self-propelled miniature underground pipeline excavation machine. 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 construction technologies of trenchless underground pipeline laying at home and abroad mainly include directional drilling, directional drilling, micro-tunneling, impact spear and pipe ramming method. American Vermeer company has a relatively complete series of pneumatic i...

AI Technical Summary

Problems solved by technology

American Vermeer company has a relatively complete series of pneumatic impact spears, with a total of 21 models with diameters ranging from 45mm to 580mm, and different accessories can be replaced according to different uses and strata, which can be used for pipe pulling, ramming and expanding pipe operations. The Institute of Exploration Technology, Chinese Academy of Geological Sciences has six specifications of H series pipe rammers, with pipe laying diameters ranging from 108mm to 1500mm; Shenzhen Drilling Electromechanical Equipment Development Co. 1020mm; the Dilong robot developed by Harbin Engineering University is a device that relies on pneumatic impact to do work, overcomes soil deformation and can advance and squeeze holes in the soil. It belongs to the impact spear; the DH series pneumatic perforator developed by Tongji University can realize underground drilling. The crossing of horizontal holes adopts the impact form of pneumatic spears, but the forward trajectory cannot be automatically corrected during the piercing process, and only straight-line construction can be completed. During construction, the initial impact positioning is realized by the benchmark pole of the target pit and the aimer of the working pit

[0004] The above methods cannot walk on their own during the tunneling construction of miniature underground pipelines, and their advancing distance is affected by pneumatic sources, hydraulic sources, etc., and the soil structure is severely damaged and the power requirements are large.

Images