An all-electric coal mine tunnel drilling rig

Abstract

The invention discloses an all-electric coal mine underground drill rig which comprises a rotating mechanism, a feeding mechanism, a lifting and angle change mechanism and a control system. The height and direction of a main engine are adjusted through cooperation of a gear-rack lifter and screw telescoping mechanisms on a supporting leg and stand columns. The rotating speed and rotating direction of a rotary motor are controlled through the control system to adjust the rotating direction and rotating speed of the drill rig, and constant-rotating-speed drilling is achieved. The rotating direction and rotating speed of a feeding motor are controlled through the control system to achieve feeding and lifting at different speeds, the rotating speed of a control motor is fed back in a closed loop through the pressure of a feeding mechanism closed hydraulic system, and constant-drilling-pressure feeding of the feeding mechanism is achieved. The drill rig is simple in structure, low in weight and lower in power consumption, and labor is saved during operation.

Description

technical field [0001] The invention belongs to coal tunnel exploration equipment in the fields of geological exploration, tunnel excavation, engineering survey, etc., and in particular relates to an all-electric coal mine tunnel drilling machine and a drilling method. Background technique [0002] Tunnel drilling rigs are mainly used for gas drainage and geological exploration in large-scale underground coal mining. They are important equipment to ensure the safety and high efficiency of underground coal mining. The driving mode of the tunnel drilling rig has gone through two stages of pneumatic and hydraulic drive. [0003] From the end of the 1950s to the beginning of the 1990s, the coal industry and various related industries in the country focused on the development and research of electric drilling rigs, trying to make electric drilling rigs the leading equipment. The driving motor is a DC motor, which cannot realize stepless speed regulation. The slewing characterist...

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Problems solved by technology

[0003] From the end of the 1950s to the beginning of the 1990s, the coal industry and various related industries in the country focused on the development and research of electric drilling rigs, trying to make electric drilling rigs the leading equipment. The driving motor is a DC motor, which cannot realize stepless speed regulation. The slewing characteristics are hard and the overload capacity is poor. The motor will be damaged prematurely due to repeated overloading.

[0005] 1. In the stage of pneumatic drilling rigs, it is mainly used in small coal mines. It has high noise, low energy utilization rate, and heavy weight. The rotation speed and feed speed cannot be accurately controlled.

[0006] 2. The full hydraulic drilling rig stage, 1). Under the coal mine, especially in the coal mining face, the hydraulic mining machinery with mineral oil as the working medium in the hydraulic system has hidden dangers of fire and explosion, and the underground operating environment is harsh and dusty. The failure rate of the system is relatively high; 2). Hydraulic drilling rigs are heavy in weight and low in energy utilization. Due to strong vibration, it is easy to cause problems such as seal failure and oil leakage

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