A Combined Crushing System of Coal and Rock Pre-splitting and Picks

Abstract

A coal and rock pre-splitting and pick combined crushing system, including a computer electric control part set in the electric control box of the shearer, and an action set inside the shearer drum and on the shearer pick In the execution part, the computer electronic control part monitors and calculates relevant data such as pressure, flow and plunger displacement in real time through relevant sensors, controls the opening and closing of the valve in the action execution part, and makes the hydraulic system supply oil to the hydraulic impact cylinder, thereby driving the hydraulic impact pick to impact and retraction, the impact frequency, impact pressure and oil supply of the hydraulic impact pick are intelligently controlled by the electronic control part of the computer. The hydraulic impact pick can quickly provide a certain depth of impact hole in the pre-contact area before cutting the coal seam surface. In this way, a local unloading area is formed, which is combined with the fixed pick on the original drum to break the rock formation, effectively protects the pick, reduces wear of the pick, and can achieve high-efficiency cutting of coal and rock.

Description

technical field [0001] The invention relates to the technical field of coal seam mining, in particular to a coal rock pre-splitting and pick combined crushing system. Background technique [0002] At present, when underground coal mines are mined, due to the presence of high-hardness coal or rock formations in some coal seams, the picks of the shearer directly collide with the hard coal seam when rotating at high speed, resulting in serious wear and tear of the picks, even fractures and shedding; During continuous work, workers often need to stop to check and replace damaged picks, which greatly hinders the progress of the project, seriously affects the construction efficiency, and increases the construction cost in the coal mining process. Therefore, it is necessary to design a better coal seam mining technology to solve the above problems. Contents of the invention [0003] Aiming at the problems existing in the prior art, the present invention provides a coal rock pre-...

AI Technical Summary

Problems solved by technology

[0002] At present, when underground coal mines are mined, due to the presence of high-hardness coal or rock formations in some coal seams, the picks of the shearer directly collide with the hard coal seam when rotating at high speed, resulting in serious wear and tear of the picks, even fractures and shedding; In the process of continuous work, workers often need to stop to check and replace damaged picks, which greatly hinders the progress of the project, seriously affects the construction efficiency, and increases the construction cost in the coal mining process

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