DTH drilling rigs are very popular in deep hole mining industry

The rotary head adopts a variable displacement high torque hydraulic motor to directly drive, so that the structure is compact, the torque is large, and the speed adjustment is convenient. The propulsion mechanism adopts two-stage telescopic cylinders to promote propulsion, stable operation, and the thrust can be adjusted steplessly, and there is a propelling equipment compensation mechanism. The positioning mechanism plays a role in positioning by the amplitude modulation; it can be inclined forward by 1 degree and backward by 100 degrees. Such as retrofitting 360's manual dial module can drill 360 ring holes. The hydraulic pumping station provides hydraulic power source, the operation platform provides all the operation of the operation, the chassis provides support for all parts, after the disintegration of the whole machine, the weight of one single piece does not exceed 300kg, and it can be conveniently carried.

The ore discharge roller was changed from 4 sections on each side to 2 sections on each side. Two water box beam pillars were removed. At the same time, the size of the discharge port was adjusted accordingly. The ore discharge was more even and forward, reducing worker scratches. Eye labor intensity. Indirect heat transfer dryers are more important in that the uniform evenness means that the heating is even, which is very beneficial to improve the quality of roasted ore. The recovery rate of the roasted ore magnetic separation tube was increased from 73.89% before the transformation to about 80.00%. In order to meet the needs of deep-hole mining, in China in the early 1980s, a tracked high-pressure DTH drill vehicle was manufactured (the same size and performance as the Swedish DTH drilling rig).

In December 1983, it passed the technical appraisal sponsored by the China Nonferrous Metals Corporation. It consisted of drilling tools, rotary air supply mechanism, propulsion mechanism, luffing mechanism, and walking mechanism. In order to control and operate these institutions, a hydraulic system was set up. And manipulating the system. Rotary air supply mechanism consists of air motor, planetary speed reducer and head box. The chain propeller equipment consists of air motor, planetary speed reducer, worm gear reducer and sleeve roller chain. The air motor drives the drilling tool through the deceleration device and the chain, and applies axial thrust. The luffing mechanism consists of a drill frame, a landing gear cylinder, a pitching cylinder, and a pendulum angle cylinder. These parts can be used to complete the front and rear swing of the drilling frame.