Rectangular shield tunneling machine with Lelo triangular auxiliary cutter head

Abstract

The invention discloses a rectangular shield tunneling machine with a Lelo triangular auxiliary cutter head. The rectangular shield tunneling machine comprises a shield tunneling shell, a supporting disc, a main cutter head, four auxiliary cutter heads and a driving device, wherein the shield shell is hollow, the supporting disc is arranged at the front end of the shield shell, the main cutter head is arranged in the center of the supporting disc, and the driving device is arranged in the shield shell; the four auxiliary cutter heads are located at the upper left position, the lower left position, the upper right position and the lower right position of the main cutter head correspondingly, and a main cutter head shaft and auxiliary cutter head shafts are connected through a gear transmission device; and the cross sections of the auxiliary cutter head and a rotor are both Lelo triangles. According to the rectangular shield tunneling machine, the four auxiliary cutter heads are arrangedaround the main cutter head, the auxiliary cutter heads and the rotor are each of a Lelo triangular structure, the cut rectangular cutting face is ideal in rectangular shape, the cutting missing areais small, on the premise that the relative size and spatial position of the main cutter head and the four auxiliary cutter heads are reasonably distributed, the length-width ratio of the cut rectangular cutting surface is large, the section space utilization rate of the shield tunneling machine can be further increased, and the working efficiency is effectively improved.

Description

technical field [0001] The invention relates to a rectangular shield machine, in particular to a rectangular shield machine with a triangular auxiliary cutterhead of a Laro. Background technique [0002] In recent years, in order to alleviate the problem of urban traffic congestion, my country has vigorously developed subway construction projects, and with the continuous development of subway projects, it has gradually become an important symbol to measure modern urban construction. However, with the continuous advancement of the urbanization process, the problem of shortage of land resources is becoming more and more serious, and the space for subway construction is continuously compressed. In this way, difficult situations such as large depths and multiple intersections will continue to emerge during construction. The above-mentioned All kinds of complex conditions make the construction of shield tunneling in subway tunnels more and more demanding, which can also promote t...

AI Technical Summary

Problems solved by technology

[0006] It is difficult to cut an ideal rectangular shape with the existing proposed rectangular shield machine cutter head distribution structure, the overall shape is elliptical, and the cut rectangle-like aspect ratio is small, the cutting efficiency of the corner position is low, and the overall shape is elliptical. The irregular shape will also have a certain impact on the layout of the external support mechanism

For example, the search found: Chinese patent CN 203905954U discloses a shield pipe jacking machine with a super large rectangular section. Although the area of ​​the rectangular section is relatively large, it uses six cutterheads for cutting, and the shape of the cutting surface is not ideal. Both the missing area with the total rectangular section and the overlap area of ​​the cutter head are larger, resulting in lower efficiency

Chinese patent CN 204804853 U discloses a drum-type rectangular shield machine. Although the shape of the cutting surface of the rectangular shield machine is relatively ideal, the complex transmission of the cutterhead structure leads to low efficiency, small cutting force, and slow tunneling speed. Disadvantages such as high requirements on geological conditions

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