What are the main classifications of borehole samplers?

Manual borehole samplers include manual transmission mechanisms, axial feed mechanisms, guiding mechanisms, and clearance adjustment mechanisms. The manual transmission mechanism consists of a spindle, a wrench connected to the upper end of the spindle, a drill bit connected to the lower end of the spindle, and a sleeve drill; the axial feed mechanism consists of a handwheel, a worm, a worm wheel, a nut, and a screw; the guiding mechanism consists of a protective box, the upper end of the protective box is connected to the screw rod through the box cover and nut, and the lower end is connected to the screw rod. The clearance adjustment mechanism consists of an adjusting nut connected to the spindle above the nut and two plane bearings on both sides of the upper end. 6 This product has good sealing performance, stable operation, and low labor intensity, and can be used for a variety of purposes. This utility model can be used as a device for drilling and installing branch pipes under pressure without stopping the conveying work on pipelines conveying liquids or gases. The drilling rig is the main machine for drilling construction. It drives the drill string and drill bit into the stratum, and uses the hoist on the drilling rig to complete auxiliary work such as raising and lowering the drill string and casing, coring, and changing drill bits. The main function of the pump is to deliver flushing fluid into the hole to clean the bottom of the hole, cool the drill bit, and lubricate the drill string. The purposes and construction objects of geotechnical drilling and excavation engineering are different, so there are many types of drilling rigs. Drilling rigs can be classified according to their uses, such as rock core drilling rigs, oil drilling rigs, hydrogeological survey and water well drilling rigs, engineering geological exploration drilling rigs, tunnel drilling rigs, and engineering construction drilling rigs. According to the drilling method, drilling rigs can be divided into four categories:

（ 1 ） Impact borehole samplers: wire rope impact borehole samplers and drill rod impact borehole samplers.

（ 2 ） Rotary borehole samplers: vertical shaft type - hand-held feed type, screw differential feed type, hydraulic feed type; turntable type - wire rope positive and negative pressure type, hydraulic cylinder positive and negative pressure type borehole samplers; mobile rotary device - Full hydraulic power head type, mechanical power head type borehole samplers.

（ 3 ） Vibration drill.

（ 4 ） Compound borehole samplers: drilling rigs that combine vibration, impact, rotation, static pressure and other functions in different combinations. In order to better utilize existing mechanized equipment, improve the performance of mechanized equipment, and give full play to its role. In order to improve the operation level of mechanized equipment for our company's mine workers, special drilling rig operation procedures are formulated.

Preparatory work before starting

① Carefully check whether all parts of the drilling rig are complete. ② Whether the screws are loose. ③ Whether the lubricating oil has reached the required position. ④ Whether the control buttons are flexible and reliable. ⑤ Whether the drill rod and drill bit are damaged. ⑥ Whether the support is broken. ⑦ Whether the sprinkler system is installed in place. 1. Select the appropriate drill bit or drill bit according to the material being drilled. 2. Adjust the appropriate speed according to the material being drilled. If the speed is too fast, the hot low-melting-point material will soften, and if the speed is too slow, the soft material will stick. 3. Determine the feed rate of the drilling rig according to the drilling depth and diameter. 4. The drilling rig is high-speed rotating feed, and safety protection should be paid attention to. 5. Pay attention to ensuring the sharpness of the drill bit. It is necessary to regularly grind the drill bit or replace the drill bit. 6. The drilling rig shaft should be lubricated regularly.