The pressure regulating mechanism completes the section of the propulsion force to complete the drilling work efficiently, the lifting and amplitude adjustment of the drilling rig is completed by the mechanism, and various actions are controlled by the control mechanism. The supporting mechanism can be a bracket or a drilling rig. Rock chips (powder) formed during drilling. The gas or water flowing through the drill pipe and the hole wall is carried out of the hole. The DTH drilling rig does not have the same ability loss as the rod drilling of the duck rock machine, because its drilling stalk does not transmit impact energy, so the impact energy loss is small, so deeper holes can be drilled. Since the impactor works deep into the hole, the noise of the working face is greatly reduced and the drilling accuracy is high. Drilling rigs are widely used in metallurgy, mining, building materials, railway, hydropower construction, national defense construction and earthwork and other open-pit projects of blast hole drilling and underwater drilling blasting reef engineering.
　　
　　precautions > normal drilling with a DTH drilling rig?
　　
　　1. No noise during operation. The middle gear meshes normally.
　　
　　2. Adjust the axial pressure of the drilling tool at any time, according to the rock situation at the bottom of the hole and the reading of the ammeter. Prevent overloading of the slewing machine. When the current exceeds the rated value, the drilling tool should be immediately raised and checked and disposed of normally before the operation can continue.
　　
　　3. The axial pressure should be reduced. When the carriage swings severely. When the air pressure is below 4 kg/cm2, drilling should be stopped.
　　
　　4. There is no bridge pressure phenomenon, and the wire rope of the lifting propulsion mechanism should be arranged neatly. The rope head is firm. Pay attention to adjusting the tightness level of the wire rope at all times.
　　
　　5. It should be disposed of according to the specific situation, when jamming occurs. The drill pipe must not be forcibly lifted. In case of thick interlayer or water coming out of the hole, drill first, and then stop the air to avoid blocking the impactor.
　　
　　6. When the impactor does not sound, the wind pressure suddenly decreases. The cause should be ascertained and dealt with in a timely manner. In order to avoid accidents such as overloading or pulling the wire rope. The limit switch of the push cylinder frame should always be flexible and effective.
　　
　　The drilling principle of a DTH drilling rig is the same as that of a heavy rock excavator: intermittent impact of rock (ore) stone, continuous rotation. The difference is in the impact mechanism of the DTH drilling rig. Connect a downhole impactor to the front end of the drill pipe, dive into the bottom of the hole, directly impact the piston drill bit, and continue as the borehole is extended. DTH drilling rigs are named after the impactor sinking to the bottom of the hole. The drilling rig completes the impact action of the impact drill through the piston of the impact capture machine, and rotates through the eye steering mechanism. Let's go 　　What are the maintenance guidelines for > using DTH drilling rigs?
　　
　　1. Regularly check the hydraulic oil
　　
　　DTH drilling rigs are semi-hydraulic vehicles. In other words, except for the influence of compressed air, the rest of the functions are realized by the hydraulic system, so the quality of the hydraulic oil is crucial for the normal operation of the hydraulic system.
　　
Second, clean the oil tank and oil filter regularly
　　
　　Impurities in hydraulic oil will not only cause hydraulic valve failure, but also aggravate the wear of hydraulic components such as oil pumps and hydraulic motors, so we set up oil suction oil filter and oil return oil filter on the structure to ensure the cleanliness of the circulating oil in the system as much as possible. However, due to the wear of hydraulic components in the work, impurities will be inadvertently brought in when adding hydraulic oil, so regular cleaning of the oil tank and oil filter is the key to ensure the cleanliness of the oil, prevent the failure of the hydraulic system and extend the life of the hydraulic components.
　　
　　Third, clean the lubricator and add lubricating oil in time
　　
　　The DTH drilling rig is through the impactor to achieve impact drilling, good lubrication is a necessary condition to ensure the normal operation of the impactor. Because the compressed air often carries moisture and the pipeline is not clean, after a period of use, the bottom of the lubricator often retains certain moisture and impurities, which will affect the lubrication and life of the impactor, so when it is found that the lubricator does not produce oil or there is moisture and impurities in the lubricator should be eliminated in time. When adding lubricating oil, the main intake valve must first be closed, and then the impact valve must be opened to remove the residual gas in the pipe to avoid injury. It is strictly forbidden to work without lubricating oil!
　　
　　Fourth, do a good job in the running-in and oil replacement of diesel engines
　　
　　Diesel engine is the source power of the entire hydraulic system, which directly affects the climbing ability, propulsion (lifting) force, swing torque and rock drilling efficiency of the drilling rig, and timely maintenance and maintenance is the premise of the drilling rig to play the best efficiency.
　　
　　5. Clean the air filter every shift to prevent the diesel engine from pulling the cylinder
　　
　　DTH drilling rigs are popular with users because of their high rock drilling efficiency, but the higher the efficiency, the more dust is generated, which has a serious impact on the operation and life of the diesel engine. Therefore, we have set up a secondary air filter (the first stage is a dry paper core air filter, the second stage is an oil-immersed air filter), and added a diesel engine air intake pipe to prevent dust and other dust from entering the body as much as possible to cause wear and pulling cylinders, and extend the service life of the diesel engine. However, the air filter can only temporarily prevent dust from entering the body, and it must be cleaned up after working for a period of time, otherwise the dust accumulation will not only block the air intake channel, but also cause the damage of the air filter, seriously affecting the performance and service life of the diesel engine.
　　
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