Rock breaking multi-arm cantilever tunneling machine carried with hobs and method for constructing rock breaking multi-arm cantilever tunneling machine

A cantilever roadheader and hob technology, which can be used in earth drilling, mining equipment, tunnels, etc., and can solve problems such as difficult excavation of special-shaped tunnels

Pending Publication Date: 2018-11-23
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the background technology when the existing roadheaders are difficult to excavate short-distance, hard ...

Method used

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  • Rock breaking multi-arm cantilever tunneling machine carried with hobs and method for constructing rock breaking multi-arm cantilever tunneling machine
  • Rock breaking multi-arm cantilever tunneling machine carried with hobs and method for constructing rock breaking multi-arm cantilever tunneling machine
  • Rock breaking multi-arm cantilever tunneling machine carried with hobs and method for constructing rock breaking multi-arm cantilever tunneling machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0034] Embodiment 2: A multi-arm type cantilever roadheader equipped with a hob to break rocks, the two rotary tables 5 are connected by bearings, such as figure 2 As shown, two cantilever arms 6 are hinged on each turntable 5 , and each cantilever arm 6 is hinged to two pitch cylinders 503 . It is convenient for the cantilever 6 to move up and down and rotate stably and uniformly, to increase the bearing capacity of the cantilever 6, and to carry out unified and coordinated rock breaking on the face of the tunnel. Other structures and usage methods are the same as those in Example 1.

Embodiment 3

[0035] Embodiment 3: A multi-arm cantilever roadheader equipped with a hob to break rock, in such as Figure 4 The middle part of the shown cutter head 7 is horizontally provided with a central knife groove 901, and six central cutters 9 are fixed in the central knife groove 901 by bolts, and four hobs 8 are arranged on the cutter head 7 on both sides of the central knife groove 901. , The hob 8 is fixed on the cutter head 7 by bolts; the included angle between the flank face of each hob 8 and the front end face of the cutter head 7 is an acute angle. During work, the central cutter 9 and the hob 8 on the cutterhead 7 contact the rock surface at the same time, the main mechanism 1 drives the rotating motor in the cantilever 6 to rotate, and the rotating shaft connected with the output shaft of the rotating motor drives the cutterhead 7 to rotate, and the cutterhead 7 drives the center cutter and the hob 8 to rotate, the cutter head of the center cutter 9 cuts into the rock in ...

Embodiment 4

[0036] Embodiment 4: A multi-arm cantilever roadheader equipped with a hob for rock breaking, in order to protect the hob 8 when cutting the edge, such as image 3 with 4 The cutterheads 7 on both sides of the central knife groove 901 shown are respectively provided with four hob grooves 801 , and each hob groove 801 is fixed with a hob 8 by bolts. Other structures and working principles are the same as in Embodiment 3.

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Abstract

The invention discloses a rock breaking multi-arm cantilever tunneling machine carried with hobs and a method for constructing the rock breaking multi-arm cantilever tunneling machine. By the aid of the rock breaking multi-arm cantilever tunneling machine and the method, the problem of difficulty in excavating short-distance, hard-rock and special-shaped tunnels by the aid of existing tunneling machines can be solved. The rock breaking multi-arm cantilever tunneling machine is characterized in that two rotary tables are symmetrically movably arranged at the front of a main mechanism of the rock breaking multi-arm cantilever tunneling machine in the up-down directions, hydraulic rotary oil cylinders for driving the rotary tables to rotate are arranged inside the main mechanism, pitching oilcylinders are arranged at the fronts of the two rotary tables, at least one cantilever is hinged onto each rotary table, rotary shafts are arranged at the fronts of the cantilevers, rotary motors fordriving the rotary shafts to rotate are arranged inside the cantilevers, the cantilevers are connected with discs by the rotary shafts, the middles of the cantilevers are hinged to the pitching oil cylinders, and the hobs are arranged on the discs. The rock breaking multi-arm cantilever tunneling machine and the method have the advantages that the multiple cantilevers are additionally arranged onthe double rotary tables, the hobs are additionally arranged on the discs, simultaneous excavation can be carried out by all the discs, accordingly, the excavation efficiency can be improved, and therock breaking rock hardness range can be expanded.

Description

technical field [0001] The invention relates to the technical field of roadheader cantilever, in particular to a multi-arm type cantilever roadheader equipped with a rock breaking hob and a construction method thereof. Background technique [0002] At present, the cantilever roadheaders used in tunnel construction are mostly used for whole-rock roadways and half-coal roadways with low hardness, and are rarely used for hard rock tunnels. Existing cantilever roadheaders have a single cantilever. During excavation, the cantilever excavation structure is close to the tunnel face. The cantilever swings left and right and up and down to cut rocks sequentially from one side to the other. The excavation efficiency is relatively low. Therefore, there is a need for a cantilever roadheader that can be used for excavating short-distance, hard rock, and special-shaped tunnels. Contents of the invention [0003] In order to solve the problems existing in the background technology when ...

Claims

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Application Information

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IPC IPC(8): E21D9/10E21D9/12
CPCE21D9/1006E21D9/1086E21D9/12
Inventor 张倩齐志冲李坤董岳杨添任范晓慧宁向可
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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