How is the classification of down-the-hole drilling machines determined? There are several typical classification methods, and what are the corresponding types of each classification method? What are the similarities and differences between pneumatic, hydraulic, and fully hydraulic down-hole drills? The editor of Hunan Ruisheng Electromechanical told everyone the story of a down-hole drilling rig.

During the rock drilling process, the impactor is located in the immersed hole, and the impactor piston (hammer) moves back and forth towards the handle through the gas distributor (valve), resulting in the drill bit hitting the rock at the bottom of the hole. The high-speed rotation of the impactor in the hole is achieved through a separate rotating mechanism, namely an electric motor or pneumatic rotating device outside the hole, connected to a drill pipe at the rear end of the impactor. The rock powder generated during the rock drilling process is washed away by the mixed gas of wind and water. The mixed gas of wind and water is injected into the impactor through the powder discharge mechanism from the center of the drill pipe, and enters the bottom of the hole through the air groove of the impactor cylinder, or is fully pneumatic. The first two are both equipped with hydraulic oil pumps on the drilling rig, which are not fully pneumatic and can be classified according to their purposes. These are quite a few, such as blasting, anchoring, water well drilling, etc, There are either integrated or split machines in structure. The full name of an air compressor is an air compressor; A machine designed based on the working principle of a double screw (also known as a positive and negative rotor) rotating to produce a change in gas volume. It can suck in natural air and then complete the work through several internal processes, ultimately discharging compressed air that meets the pressure requirements. This machine is called a screw air compressor< Br/>


There are various forms of working pressure and pressure units for screw air compressors, but this section mainly introduces the commonly used pressure display devices for screw air compressors< Br/>


Work pressure, domestic users often call for exhaust pressure. Working pressure refers to the maximum pressure of air discharged from the air compressor< Br/>


The commonly used working pressure units are: bar or Mpa, with 1 bar=0.1 Mpa< Br/>


Generally speaking, users usually refer to the unit of pressure as Kg (kilogram), where 1 bar=1 Kg< Br/>


Volume flow rate of screw air compressor:



Volume flow, commonly referred to as displacement for domestic users. Volume flow rate refers to the volume of gas discharged by the air compressor per unit of time at the required exhaust pressure, which is converted into the intake state< Br/>


The unit of volumetric flow is: m³/ Min (cubic/minute) or L/min (liter/minute), 1m³ (cubic)=1000L (liter)< Br/>


Generally, the commonly used flow units are: m³/ Min (cubic meter per minute)< Br/>


Volume flow is also called Engine displacement or nameplate flow in China. 333HP< Br/>


Selection Guide for Screw Air Compressors



Selection of working pressure (exhaust pressure): When users are preparing to purchase an air compressor, they first need to determine the required working pressure at the gas end, add a margin of 1-2 bar, and then select the pressure of the air compressor. (This margin considers the pressure loss from the installation location of the air compressor to the actual gas end pipeline distance, and appropriately considers the pressure margin between 1-2 bar based on the length of the distance). Of course, the size of the pipeline diameter and the number of turning points are also factors that affect pressure loss. The larger the pipeline diameter, the smaller the turning point, and the smaller the pressure loss; Otherwise, the greater the pressure loss. Therefore, if the distance between the air compressor and each air end pipe is too far, it is necessary to increase the diameter of the main pipe appropriately. If the environmental conditions meet the installation requirements and working conditions of the air compressor, it can be installed near the air end< Br/>


Volume flow rate selection: When selecting the volume flow rate of an air compressor, the first step is to understand the volume flow rate of all gas equipment, and multiply the total flow rate by 1 and three maintenance items. Crimp the connector contact and insulation resistance of electrical components, and replace the motor lubricating grease (every 8000 hours). If there are parameters in the equipment manual, the manual shall prevail; Clean the unloading valve (intake valve); Clean the minimum pressure valve (pressure maintenance valve); Clean the return oil one-way valve; Clean the temperature control valve; Clean the cooler; Clean the water gas separator; Correct all parameters. Note: The above maintenance should only be carried out after the equipment is confirmed to have no electricity or pressure. The steps for selecting an air compressor are to first determine the working pressure, then determine the corresponding volume flow rate, and finally determine the power supply capacity< Br/>


At present, the country is comprehensively promoting the construction of green mines and green mining areas. The ZGYX453 automatic integrated open-pit down-hole drilling rig is a safe, environmentally friendly, cost-effective down-hole drilling rig independently developed by Zhigao Machinery Co., Ltd. in this environment. It can be widely used in various open-pit mines, quarries, construction sites, and other occasions. Product features: In response to the national requirements for green and environmentally friendly mines, according to the construction conditions of the mine, the product is equipped with dry dust collection as standard and wet dust collection as optional. The compact design, like the excellent flexibility and powerful operation ability of a split drilling rig, allows a drilling rig to adapt to different working conditions and aperture requirements, while always maintaining the optimal fuel consumption state.

A fully enclosed (with cold and warm air conditioning), shockproof, and full view cab provides a comfortable working environment for operators, and also reduces the safety hazards of operators working in the open air. Equipped with an automatic drill rod changing mechanism as standard, reducing employee staffing and expenses. Drilling diameterφ 90-138mm, with a hole depth of 21m (6+1 drill pipe), can meet the needs of most construction sites. The full flow hydraulic control device can provide smooth and sensitive movement for the positioning of the drilling arm and thruster, achieving fast drilling positioning. (Optional with depth gauge and angle gauge). advance. 5° Two options to meet the complex construction requirements on site. The strong turning torque and drill pipe lifting force provide reliable guarantee for the drilling rig to operate in complex geological rock formations. Integrated pressure testing device design, with identification of power and hydraulic pipelines, facilitates rapid fault diagnosis and handling< Br/>


Zhigao screw air compressor, down-hole drilling truck, and integrated drilling rig, please contact us, Hunan Ruisheng Electromechanical Equipment Co., Ltd. Hunan Ruisheng Mechanical and Electrical Equipment Co., Ltd. is the only authorized dealer and service provider of ZEGA Zhigao Tunnelling (Shanghai) International Trade Co., Ltd. in Central China, and the only one in Central China that specializes in serving green mines, open mines, underground mines, engineering drilling and blasting projects, foundation pit anchoring construction, geological exploration and sampling, well geothermal and other engineering projects with drilling rigs, integrated down the hole drilling rigs, integrated full hydraulic drilling rigs A professional company specializing in the sales and application services of underground excavation trucks and air compressors.