A Rectangular Shield Machine with Lello Triangular Side Cutter

Abstract

The invention discloses a rectangular shield machine with a triangular auxiliary cutterhead of Lairo, which comprises a shield shell, a support plate, a main cutterhead, four auxiliary cutterheads and a driving device; the inside of the shield casing is hollow, and the shield machine The front end of the casing is provided with a support plate, the center of which is provided with a main cutter head, and the driving device is installed inside the shield shell; The disc shaft and the sub-cutter shaft are connected by a gear transmission device; the sub-cutter and the rotor have a Relo triangle cross-section; the present invention sets four sub cutters around the main cutter, and the sub-cutter and the rotor are all of a Relo triangular structure , the cut rectangular cutting surface is not only ideal in rectangular shape, but also has a small missing area. On the premise of reasonably allocating the relative size and spatial position of the main cutter head and the four auxiliary cutter heads, the cut rectangular cutting surface The ratio of length to width is large, which can further improve the space utilization rate of the shield machine section and effectively improve work efficiency.

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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