Heading machine cutting head with rake teeth, extensible structure and attached drilling tools

Abstract

The invention relates to a cutting head of a roadheader with rake teeth, a telescopic structure and an attached drilling tool, belonging to the category of mining equipment. It is restructured from the existing roadheader. Its features are: the original cutting arm can not be stretched or stretched when one part bears pressure, and becomes a stretchable structure that bears pressure at both ends. Hydraulic motor direct drive. The outer spray is changed to the inner water spray structure, so that the pick can be effectively cooled, and the longitudinal thrust is directly pushed and pulled by two hydraulic cylinders. There are 3 additional shallow hole drilling tools on the arm, still using the existing idle power, capable of high-speed drilling, combined with appropriate blasting technology, the whole constitutes a new generation that can really drill soft and hard rocks, including extra hard rocks The new roadheader has low consumption, fast excavation speed, light and flexible body, and can also drill smaller-sized roadways.

Description

[0001] (1) Technical field [0002] The invention relates to a cutting head of a roadheader with rake teeth, a telescopic structure and an attached drill 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 it is basically a saying when it comes to hard rock excavation. In reality, the so-called hard rock excavation machine is more cost-effective and cheaper than traditional blasting operations for excavation in hard rock. Fast, for example, a certain Ordovician limestone that is being excavated, it takes an average of 4 picks to penetrate 1 meter, and it takes three days to break the pick seat. It is inferred that the outer retaining spring is several times a shift, once a Check; taking the 260 type hard rock tunneling machine as an example, the telescopic cutting head was changed to a fixed non-telescopic o...

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Problems solved by technology

[0004] Today's roadheaders have excellent performance in coal roadway and soft rock excavation, but it is basically a saying when it comes to hard rock excavation. In reality, the so-called hard rock excavation machine is more cost-effective and cheaper than traditional blasting operations for excavation in hard rock. Fast, for example, a certain Ordovician limestone that is being excavated, it takes an average of 4 picks to penetrate 1 meter, and it takes three days to break the pick seat. It is inferred that the outer retaining spring is several times a shift, once a Check; taking the 260 type hard rock tunneling machine as an example, the telescopic cutting head was changed to a fixed non-telescopic one. The reason is that the telescopic spline has limited force area and cannot resist the lateral movement during hard rock excavation. 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, and sparks may appear when rock excavation , the pick needs to cool down urgently, but the external spray system can't do it, the load tooth is working under high temperature, the wear is serious, the cutting head will not expand and retract, and it is difficult to remove the slag. A pile of slag can’t be cleaned, nor can it be cleaned on the left and right sides. When supporting, it is necessary to manually dig holes and plant piles, which affects the efficiency. When cutting forward, it uses walking power, and the strength is difficult to control. Tooth seat, pick or external circlip

It is unrealistic to excavate hard rock and extra-hard rock, so drilling machines are used to make up for this defect, but the drilling machines that can drill hard rock have obvious disadvantages when drilling soft rock, and it is actually impossible to use the two machines at the same time; Composed of countless folds, especially in metamorphic rock and magmatic rock areas, 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 soft and hard changes frequently in the magmatic activity zone, broken zone zone, and alteration zone close to the ore body or fault, even in the sedimentary rock zone. There will be soft muddy (carbon) shale and very hard rock. How to easily excavate in soft and hard rock areas is an urgent problem to be solved in reality. The market urgently needs such machines. 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. Speed ​​roadway detection is cost-effective; this invention is a supplement to the announced patent No. 201610843863.4 technology

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