The attention problems in the use of open-air submerged drilling rigs are listed in the following small series: 1. The torque and driving force of the open-air submerged drilling rig should be matched in the construction site. In the process of drilling, the rig drilling and drilling is often presented. Although this has little damage to the rig itself, it greatly reduces the drilling power. . Due to the first stoppage after drilling, the drill pipe is lowered, and the drill pipe is drilled and drilled again. Often the drill is stuck with magma, and the drill pipe is not easily removed, which is very time consuming. If there is no doubt about the type selection, the direct reason for the formation of plugging is that the drilling torque and the driving force do not match well. Because the two control valves that control the motor to reverse and the legs push are non-polar speed control valves, the operator is During the drilling process, the two valves should be adjusted at any time so that the rig can be timely adjusted when the conditions of the top plate change, so that the matching value of the torque and the driving force of the drilling rig changes with the change of the top plate, so as to prevent and reduce the jamming Appearance. At the scene, it was found that the vast majority of operators opened the two valves to large, regardless of whether the top plate change does not change, the torque does not match with the driving force, just drill down until the drill does not stop, This does not prevent the formation of a blockage. 2. To supply the air pressure and air volume for the open-ended submerged drilling rig. The normal air pressure for the domestic pneumatic drilling rig is 0.4 to 0.63 MP. The diameter of the air pressure pipeline is not less than Φ25. As long as the above conditions are fulfilled, it can be ensured that the open-pit Drilling Rig operates under additional conditions. At the construction site, equipment is often found to be out of service, and the reason for the search is that most of the questions are in the following two aspects: The first condition is that the air pressure at the drilling rig reaching the open air is less than 0.4 MP. The second situation: the diameter of the air pressure pipeline is less than Φ25. The first condition occurred in some old mines. Due to the long history of production of old mines, the laying of underground pressure air pipes was relatively long and the loss of pipelines was relatively large. Although the air pressure was large at the outlet of the pressure fan, it passed The pipeline is transported to the open-surface submerged drilling rig on the working surface, and it drops below 0.4 MP. Although the rig can operate, the power is very low. This situation should promptly replace some of the pipeline resistance, timely in the pipeline center plus pressure equipment. In the second situation, the new mines and the places where the pressure winds were compared and presented are present in more places. Although the downhole pressure lines are shorter, the pipe diameter is sometimes smaller than Φ25, the ventilation area is smaller, and the air volume is also smaller. Although the wind pressure has reached the demand, the open-air DTH drilling rig will not achieve additional conditions. This situation should replace the pipeline in time. 3, the water pressure should be matched with the pressure strength of the water pipe in the use of the site, often have the situation of the open-ended submerged drilling rig's own water pipe burst. Once it breaks, the equipment cannot be used properly, giving the production unnecessary losses. The onset of this condition is that the water pressure is higher than the pressure of the water pipe. At present, most of the pressure water used in coal mines is that surface water flows directly downhole and the water pressure is determined by the depth of wells. Well depths are quite different from each other. Therefore, there is a question of matching the water pressure with the water pipelines. Manufacturers usually choose the water pipe, pressure capacity is about 0.4MP, if the mine water pressure is lower than this pressure, do not have to think about this matching doubt, if higher than this pressure, it should promptly tell the manufacturer, demand with high resistance Press the water pipe so that it matches your mine water pressure. For more information, please pay attention to China Deep Hole Rig Trading Website http://skzj.99114.com Sung Precision Mould & Plastic Co., Ltd. , https://www.injectionmoldingfactory.com
Attention problems in the use of open-air submersible drilling rigs
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