Combined cutterhead of rectangular top pipe heading machine

Abstract

The invention discloses a combined cutterhead of a rectangular top pipe heading machine. The combined cutterhead comprises a rectangular cylinder. The outer edge of an excavation surface of the rectangular cylinder is provided with a peripheral guardrail which is arranged in a rectangular manner. Peripheral cutters are equidistantly welded at the front edge position of the peripheral guardrail. One circle of the excavation surface of the rectangular cylinder is provided with reinforcing blocks which are equidistantly welded on one circle of the excavation surface of the rectangular cylinder and are integrally formed with the inner wall of the peripheral guardrail. The middle part of the excavation surface and four hanging corners of the rectangular cylinder are respectively provided with amain installing hole and auxiliary installing holes. Through the combined design of the main cutterhead assembly and the auxiliary cutterhead assembly, an excavation area and excavation strength canbe enlarged; a main cutterhead assembly and an auxiliary cutterhead assembly have the same structure and respectively comprise a wheel hub and outer protecting ring; the axial position of the wheel hub is provided with a fish tail cutterhead; and through the fish tail cutterhead which projects in an axial direction, preliminary fragmentation excavation in a tunneling process of a pipe pushing jackcan be realized; and a pressure which is generated in a tunneling process can be shared through arranging a plurality of web plates.

Description

technical field [0001] The invention relates to the technical field of the cutter head of a pipe jacking machine, in particular to a combined cutter head of a rectangular pipe jacking machine. Background technique [0002] Rectangular pipe jacking machine is an effective tool for excavating pipelines and tunnels through underground excavation construction methods, and the cutter head is the primary tool for pipe jacking machine to fully excavate pipelines, but in the prior art more is used A single cutter head has low excavation efficiency, and the combined cutter head on the market has insufficient support strength, which is very easy to cause the spokes (that is, spokes) to break during the excavation process. At the same time, the outer peripheral guardrail of the excavation surface of the rectangular cylinder lacks support. The structure is easily deformed so that the peripheral knife on the front side is deformed, thereby enhancing the propulsion resistance of the excav...

AI Technical Summary

Problems solved by technology

[0002] Rectangular pipe jacking machine is an effective tool for excavating pipelines and tunnels through underground excavation construction methods, and the cutter head is the primary tool for pipe jacking machine to fully excavate pipelines, but in the prior art more is used A single cutter head has low excavation efficiency, and the combined cutter head on the market has insufficient support strength, which is ve

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