There are two kinds of DTH drilling rigs: pneumatic and electric, the wind dynamic is increased, the drilling depth is larger than the electric, and the hole diameter is also larger than the electric, but the advantage of electric is that the number and weight of complete sets of equipment are smaller, which is convenient for site transfer. DTH drilling rigs can vary from near zero to nearly 90 degrees.
　　
　　Light weight, easy to disassemble, extremely convenient installation and relocation. The angle adjustment of the drilling rig is convenient, and the positioning is accurate and reliable. Full hydraulic control, flexible, convenient and fast operation. Large swing torque, strong impact force, high drilling efficiency. Strong lifting force provides conditions for medium and deep hole drilling. The use of special pipe drilling tools, can be used under harsh geological conditions such as unstable formations, and the quality of holes is good. Tracked open-air DTH drilling rigs are powered by pneumatic, electric or internal combustion engines; The working pressure is divided into high, medium and low wind pressure series products. It has large climbing ability and strong adaptability to rough and uneven road surfaces; The characteristics of good stability of rock drilling operation. Crawler open-air DTH drilling truck can be equipped with various types of DTH impactors, which can drill blasting holes, drill blasting holes, drilled holes, anchor cable bolt holes, grouting holes, survey holes, etc. with different apertures, different depths, multiple orientations, and multiple angles, with a wide range of adaptation and high rock drilling efficiency. The crawler open-air DTH drilling truck can also be equipped with dry or wet dust collectors for rock drilling operations, effectively reducing the pollution of dust to the environment and protecting the health of operators. The open-air DTH drilling truck is powered by a single compressed air, and after matching with the DTH impactor, it can drill horizontal, vertical, inclined and other multi-directional blast holes, pre-cracks and anchor cable (rod) holes. Rock drilling trolleys are also called drilling trolleys. It is a kind of rock drilling equipment constructed by drilling and blasting method for tunnel and underground engineering. It can move and support multiple rock drills to drill holes simultaneously. It is mainly composed of rock drill, drilling arm, steel structure frame, walking mechanism and other necessary auxiliary equipment, and equipment added according to the needs of the project. When tunneling by the drilling and blasting method, it provides favorable conditions for the use of rock drilling trolleys, and the combination of rock drilling trolleys and ballast loading equipment can speed up construction, increase labor productivity, and improve labor conditions.
　　
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