Radially telescopic type cutterhead and rectangular shield machine using cutterhead

Abstract

The invention discloses a radially telescopic type cutterhead and a rectangular shield machine using the cutterhead. The radially telescopic type cutterhead comprises a cutterhead seat, a fixed spoke arm is arranged on the cutterhead seat and is of a hollow cylindrical structure, one end of the fixed spoke arm is open, and the other end of the fixed spoke arm is mounted on the cutterhead seat; a telescopic spoke arm and a telescopic driving mechanism are arranged in the cylinder body of the fixed spoke arm, one end of the telescopic driving mechanism is mounted at the bottom of the cylinder body of the fixed spoke arm, and the other end of the telescopic driving mechanism and the telescopic spoke arm are mounted together to drive the telescopic spoke arm to extend and retract from the opening end of the fixed spoke arm; the fixed spoke arm and the cutterhead seat are arranged on the same plane, and a fixed cutting head is arranged on the outer surface of the fixed spoke arm; and a telescopic cutting head is arranged at the end, facing the outside, on the telescopic spoke arm. According to the radially telescopic type cutterhead, the blind area is excavated by radial extending and retracting of the telescopic spoke arm, the telescopic spoke arm stretches out and accurately excavates the blind area according to the range of the blind area, and non-blind area and full-face excavation of the rectangular section are achieved.

Description

technical field [0001] The invention relates to the technical field of manufacturing special-shaped shield tunneling machines, in particular to a radially telescopic cutter head and a rectangular shield machine using the cutter head. Background technique [0002] Shield machine is a rapid tunnel excavation equipment that integrates light, mechanics, electricity, hydraulics, sensing, and information. Compared with the traditional manual excavation method, the shield method is safe, fast, and efficient. With the continuous development of urban underground space, shield tunneling has been widely used in subways, highways, railways, comprehensive pipe galleries, water conservancy and hydropower, Coal mine roadway and other engineering fields. [0003] Shield machines can be divided into circular shield machines and special-shaped shield machines according to their excavation shapes. The more commonly used cross-section shape of special-shaped shield machines is rectangular. Ci...

AI Technical Summary

Problems solved by technology

Circular tunnels can be excavated in full section through the rotation of the cutter head of the shield machine. It is difficult for the rectangular shield to realize full-scale excavation only through the rotation of the cutter head. The rotation of one cutter head forms a circular section, usually in the rectangular shield The front end of the machine is equipped with two side-by-side cutterheads, which can excavate a larger area through the rotation of the two cutterheads, but it is still unable to complete the excavation of the entire rectangular section, and the remaining parts outside the two circular sections That is, the blind area of ​​excavation, especially in some high-strength strata, the blind area of ​​excavation seriously restricts the forward excavation of the shield machine

In the current rectangular shield construction process, it is usually necessary to use other equipment to further excavate the blind area of ​​the excavation to complete the entire rectangular section. Therefore, the excavation of the rectangular section has the problems of high construction difficulty and low excavation efficiency.

Some rectangular shield machines complete the excavation of rectangular sections by setting multiple cutterheads with different positions and sizes, but such shield machines have complex structures, difficult coordination of control systems, and high cost

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