What is DTH Drilling?
DTH is a way of drilling holes. The DTH drilling rig machine uses hammers and drill bits placed at the bottom of the hole to impact and crush the rock. DTH drilling equipment are widely used in metal mines, hydropower, transportation, building materials, harbors, and national defense projects. The rig machine price is relatively cheap, which makes the DTH rig machine especially suitable for small and medium-sized open-pit mines. The characteristic of the down-the-hole drilling rig is that the special impactor works in the hole, and the impact energy transfer efficiency of this direct rotary drilling rig is high.
Features Of Full Hydraulic Surface Down-The-Hole (Dth) Drilling Rig:
High reliability, easy maintenance and troubleshooting, and simple operation.
Safe and efficient, equipped with a safe cab, DTH boring machine is suitable for working in various weather conditions. The automatic rod changing device can greatly reduce the difficulty of operation, avoid the possible risks of manual rod changing, improve the degree of mechanization, and reduce labor costs.
Pay attention to the working environment. The two-stage dust removal device meets the requirements of on-site environmental protection, effectively controls dust emissions, and creates a safe and environmentally friendly working environment.
The compact structure and efficient system of the DTH rig machine can effectively save fuel consumption and reduce production costs. In the future, the all-in-one hydraulic drilling rig will become a trend, leading the future of the industry.
Taiye is one of the best professional DTH drilling rig manufacturers in China. We have recognized down-the-whole hydraulic drilling equipment in different applications around the world. We can not only provide a complete drill string but also provide knowledge to help customers apply. We have the experience and expertise to provide our customers with a complete solution package.
Working Principle of Full Hydraulic Down the Hole (DTH) Drilling Rig
Full hydraulic down-the-hole (DTH) drilling rig is a drilling rig for sale that uses oil pressure to drive and control all moving parts in the process of adjusting the drill rod's forward and backward angle. With the help of the high-pressure variable oil pump and variable oil motor, this kind of drilling rig can complete step-less speed change, simplify the transmission mechanism, remove the gearbox, reduce the weight of the drilling rig, and make full use of power.
Full Hydraulic Down the Hole (DTH) Drilling Rig Specification
According to the drilling diameter and mechanical weight, the DTH rig machine can be divided into light DTH hydraulic drilling machine (drilling diameter is 70-120mm, drilling weight is hundreds of kg to 2-3T), medium DTH hydraulic drilling machine (drilling diameter is 150mm, drilling weight is 6-17t), heavy DTH hydraulic drilling machine (drilling diameter is 200mm, drilling weight is 20-40t), extra heavy DTH hydraulic drilling machine (drilling diameter is 250mm, drilling weight is more than 4T) 0 tons).
Types of Full Hydraulic Down the Hole (DTH) Drilling Rig Products
1) According to the different matching wind pressure, DTH drilling rig machine can be divided into low wind pressure DTH drilling rig (wind pressure is 7-10bar), medium wind pressure DTH drilling rig (air pressure is 10-15bar), high wind pressure DTH drilling rig (air pressure is 15-25bar).
2) According to the different use environments, the hydraulic drilling rig for sale then can be divided into open-pit DTH drilling rig and underground DTH drilling rig.
① Open-pit DTH drilling rig
The open-pit DTH drilling rig is composed of an impactor (or drill bit), rotary mechanism, lifting mechanism, pressure device, walking mechanism, slag discharge system, drilling frame, and drill pipe. The drill uses drill pipe to drive pneumatic impactor and drill bit to rotate together and uses piston impact drill bit of pneumatic impactor to break ore and rock. It is usually used to drill 80-250mm diameter blast holes in small and medium-sized mines.
②Underground DTH drilling rig
When drilling a borehole with a diameter less than 150 mm, 80-150 mm small diameter, an underground DTH drilling rig machine can be used.
Underground DTH rig machines can be divided into self-propelled and non-self-propelled according to whether there is a walking mechanism.
Applications of Full Hydraulic DTH Drilling Equipment
DTH drilling equipment is a new type of energy-saving and rock drilling equipment, which is widely used in large diameter blast hole drilling operations in small and medium-sized mines, road construction, national defense, water conservancy, and stonework projects. It is also an essential DTH bore drilling machine for sale, which is designed for early mining of open-pit mines, especially suitable for rough and concave terrain where other drilling vehicles cannot operate normally.
Difference Between Full Hydraulic Down the Hole (DTH) Drilling Rig and Hydraulic Rotary Drilling Rig
Difference of Working Methods of the Hydraulic Drilling Rig for Sale
Hydraulic Rotary Drilling Rig: All the actions of the hydraulic rotary drilling rig are driven by the hydraulic system. The main actions of the rotary drilling rig include: Shoe spreading, leg lifting, main and auxiliary winch lifting, boom luffing, drilling mast luffing, pressurized hydraulic cylinder (or winch pressure), power head rotation, turntable rotation, walking, etc. Its action is divided into drilling operation state and non drilling operation state.
Full Hydraulic DTH Drilling Equipment: The diesel engine is used as the power to drive the hydraulic oil pump to form a high-pressure oil circuit. Through the relevant hydraulic control valves on the control console, the hydraulic motor and hydraulic cylinder are driven to complete various predetermined actions. When working, start the power to push the handle on the rotary control valve, and the pressure oil drives the rotary motor on the rotary machine to rotate through the rotary control valve. Push the handle on the travel control valve to realize the forward, backward, turning, and other actions of the whole machine. Push the handle on the control valve of the oil cylinder to control the related oil cylinders to complete the pitch, swing, compensation of the guide rail, and the pitch action of the drill arm. Push the handle on the propulsion control valve to realize the telescopic action of the propulsion cylinder, and drive the chain to feed and lift. When the propulsion oil cylinder shrinks and the rotator rotates forward, the ball valve on the air inlet pipeline is opened at the same time to supply the pressurized air from the air compressor to the drill pipe and the impactor. The impactor works and blows the broken rock out of the ground, so as to realize the continuous feeding of the broken rock of the impactor and form the rock drilling.
Difference of Applications of the Hydraulic Drilling Rig for Sale
Hydraulic Rotary Drilling Rig: The hydraulic rotary drill is mainly suitable for the construction of sandy soil, cohesive soil, silty soil and other soil layers, and is widely used in the construction of cast-in-place piles, continuous wall, foundation reinforcement and other foundation.
Full Hydraulic DTH Drilling Rig: DTH boring rig machine is one of the main construction equipment in mine, railway, highway, hydropower, coal, and construction projects.