Variable-position shearing and breaking device of compound stratum pipe pushing machine

Abstract

The invention discloses a variable-position shearing and breaking device of a compound stratum pipe pushing machine and relates to the technical field of tunneling. A tool disc is arranged at the front end of the pipe pushing machine, the output end of a main driving device is fixedly connected with a flange of the tool disc, and the main driving device is fixedly connected with a pressure cabin partition of an anterior shield cone ring. When the main driving device drives the tool disc to rotate along a rotary central shaft, an active breaking plate of the tool disc rotates along a bracket and generate alternative shear space relative to the anterior shield cone ring, large rock can be passively stopped by a baffle when rotating along with the active breaking plate and can be broken into many small rocks by shearing force as the principal and extrusion force as the auxiliary, and the small broken rocks can be discharged to a discharge device via slag holes in a trapezoidal slag discharge plate, and a bus of the conical surface formed spatially is parallel to the bus of the spatial conical surface formed by the anterior shield cone ring when the bracket rotates. Accordingly, large rocks can be broken by the variable-position shear space, and invalid rolling is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation, and in particular relates to a displacement, shearing and crushing device of a pipe jacking machine for composite formations. Background technique [0002] With the development of the national underground network, there is an increasing demand for pipe jacking machines capable of breaking rock. The rock crushing pipe jacking machine is mainly a pipe jacking machine in the form of mud and water. When this pipe jacking machine advances in the rock layer, the smaller rock particles cut by the tool can be discharged through the mud discharge pipe smoothly, while the large particle size rock will be If it is stuck in the mud discharge pipe, the mud pipe will be blocked, so that the cut rocks cannot be discharged normally, which directly affects the construction progress, which requires secondary crushing of large-sized rocks. [0003] A number of technical solutions in this area have been p...

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Problems solved by technology

In addition, there are patent No. (200920069594.6) unequal polygonal eccentric broken pipe jacking machine, patent No. (03229682.7) polygonal broken muddy water pipe jacking machine, etc. Most of them use the space change produced by the eccentric rotation between the cutter head and the front shield shell. The large rock fragments are squeezed and crushed, the cutter head support arm and the perforated plate are in the shape of a bell mouth, and the large rock fragments will not actively squeeze and crush in the direction of the west mouth of the bell mouth, and the large rock fragments need to roll multiple times in this space It cannot be crushed until it is stuck at a suitable angle, which will affect the crushing efficiency and slag discharge efficiency

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