All-cross-section cutting rectangular pipe-pushing machine cutting mechanism

Abstract

The invention relates to an all-cross-section cutting rectangular pipe-pushing machine cutting mechanism used in rectangular pipe-pushing devices used in non-excavation engineering. The mechanism comprises an installing seat, four cutterheads with cutting surfaces located on the same plane are installed on the front end face of the installing seat, centers of rotating shafts of the four cutterheads are respectively located on four vertexes of a square and are driven by an identical spindle located at the center of the installing seat to synchronously rotate at a uniform speed, the end face contour of every cutterhead is a long shape with the dimension in the length direction larger than the dimension in the width direction, cutting blades are arranged on the edge of the cutterheads, the length direction of every cutterhead is perpendicular to the length direction of the cutterheads adjacent to the cutterhead, the maximum cutting radius of every cutterhead and the maximum cutting radius of the adjacent cutterhead have an overlapped part, and the four cutterheads do not interfere with each other when rotating synchronously at the uniform speed. Rectangular all-cross-section cutting can be achieved, the all-cross-section cutting rectangular pipe-pushing machine cutting mechanism is high in difficulty overcoming capability, simple in structure and high in reliability, the technical requirements for constructors are low, and soil mass is mixed fully.

Description

technical field [0001] The invention relates to underground engineering construction equipment, in particular to a cutting mechanism for a full-section cutting rectangular pipe jacking machine used in rectangular pipe jacking equipment used in trenchless engineering. Background technique [0002] Trenchless underground pipe jacking construction is a pipeline laying method that replaces manual excavation. It only needs to excavate working wells at the starting point and end point of pipeline laying, and use pipe jacking equipment to use hydraulic cylinders to directly excavate in the underground soil layer. Pipe connection. [0003] Rectangular pipe jacking is a kind of pipe jacking construction, which is mainly used in the non-excavation construction of subway pedestrian passages, high-voltage cables and other projects. It uses rectangular pipes for pipeline laying, which has the advantages of large effective cross-sectional area, wide adaptable size range, and high space u...

AI Technical Summary

Problems solved by technology

Its disadvantages are: difficult process realization, low product reliability, insufficient soil mixing, and low transmission efficiency

Its defects are: complex structure, difficult sealing, low transmission efficiency

Its defects are: non-full section cutting (80-85%), low ability to escape, uneven soil mixing

Its disadvantages are: low ability to get out of trouble, uneven mixing of soil

Its disadvantages are: difficult manufacturing, low reliability, difficult construction and high requirements for operators

Images