Roadheader cutting head with harrow teeth, telescopic structure thereof and accessory drilling tool

Abstract

The invention provides a roadheader cutting head with harrow teeth, a telescopic structure thereof and an accessory drilling tool, and belongs to mine equipment. The cutting head is improved from a cutting arm and a cutting head of an existing roadheader. The cutting head is characterized in that by means of a spline type sleeve shaft structure using ball driving, the structure that the original cutting arm does not stretch and retract or one end of the original cutting arm bears pressure during stretching and retracting becomes a scientific two-position pressure bearing telescopic structure, and if outer meshing gear transmission with increased weight is used for power transmission, transverse cutting force is nearly multiplied due to rotating inertia. An outer spraying mode is changed into an inner water spraying structure. The position of a high-pressure water seal is changed to a small-outer-diameter shaft tail to reduce abrasion and effectively cool cutting teeth, two hydraulic cylinders are used for providing longitudinal push force, and the defect that pushing and pulling depend on walking in the prior art is avoided due to direct and controllable pushing and pulling; the multifunctional movable harrow teeth are additionally arranged on the cutting head, so the cutting head has the function of a slag-raking machine; a plurality of shallow hole drilling tools are additionally arranged on the cutting arm and matched with a proper explosion technology, so the overall performance is better than that of a drill loader, valuable stone can be exploited, zero-cost driving is achieved, and the updated and novel roadheader which can truly hit soft and hard rock, including ultra-hard rock, is formed as a whole.

Description

[0001] (1) Technical field [0002] The invention relates to a cutting head of a roadheader with rake teeth, a telescoping structure and an attached drilling tool, in particular to a roadheader, which belongs to the category of mining equipment. [0003] (2) Background technology [0004] Today's roadheaders have excellent performance in coal roadway and soft rock excavation, but they are basically not suitable for rock excavation. Taking the 260 rock roadheader as an example, the telescopic cutting head has been changed to a fixed non-extensible one. The reason is that it is telescopic. At the spline, the force area is limited, and it cannot resist the lateral pressure of rock excavation. The internal spray system is changed to external spray. The reason is that the high-pressure water seal of the internal spray system is too large in diameter and the vibration in the range of the rotation gap is severe. , the sealing ring is easy to wear and damage, and it is difficult to rep...

AI Technical Summary

Problems solved by technology

[0004] Today's roadheaders have excellent performance in coal roadway and soft rock excavation, but they are basically not suitable for rock excavation. Taking the 260 rock roadheader as an example, the telescopic cutting head has been changed to a fixed non-extensible one. The reason is that it is telescopic. At the spline, the force area is limited, and it cannot resist the lateral pressure of rock excavation. The internal spray system is changed to external spray. The reason is that the high-pressure water seal of the internal spray system is too large in diameter and the vibration in the range of the rotation gap is severe. , the sealing ring is easy to wear and damage, and it is difficult to replace it. Sparks can emerge from rock excavation, and the pick needs to be cooled urgently, but the external spray system cannot do it. The load tooth is working at a high temperature and is easy to wear. The slag is difficult, and when the left and right front ends are supported, it is even more difficult to dig holes and plant piles manually, which affects the efficiency

It is obviously unrealistic to excavate hard rock and extra hard rock, so drilling machines are used to make up for this shortcoming, but drilling machines that can drill hard rock have obvious disadvantages when drilling soft rock. It is obviously not cost-effective for companies to buy two kinds of machinery at the same time; but the crust is It is composed of countless folds, especially in the metamorphic rock and magmatic rock area, and the folds are layered structures composed of different lithologies, which means that the lithology must be alternately hard and soft, especially in multi-stage rocks. The secondary magmatic activity area, fracture zone, and alteration area close to ore bodies or faults have more frequent soft and hard changes, even in sedimentary rock areas. There will be soft muddy (carbon) shale and very Hard Ordovician limestone with strong silicification appears. How to easily excavate in soft and hard rock areas is an urgent problem to be solved in reality. The market is in urgent need of such machines. Geological exploration units are especially developed in certain vegetation. Geophysical prospecting is difficult in areas with extremely harsh landforms and geographical environments. The verification of geochemical anomalies and regional geological speculation also requires low-cost and high-speed roadheaders. Compared with a drilling that costs two to three hundred thousand yuan, low cost and high speed Lane hunting is a bargain

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