Secret Teach you how to distinguish the drill. Name of drilling rig and trolley? _ Impact

Ad Details

Drilling principle 2.1 Percussive drilling principle The percussive principle is applicable to the drilling of medium-hard and above rocks. The equipment for drilling by percussive method includes pneumatic rock drill, hydraulic rock drill, down-the-hole drill, steel cable percussive drill,Tapered Rock Bit, etc. Percussion drilling can be divided into two types: down-the-hole drilling and top-hammer drilling. 2.1.1 Principle of down-the-hole drilling The principle of down-the-hole impact drilling is shown in Figure 1. The down-the-hole drilling is to install the impactor with impact effect at the bottom of the drill pipe and directly impact the drill bit to drill the hole. 2.1.2 Principle of top-hammer percussion drilling The principle of top hammer impact drilling is shown in Figure 2. Top hammer drilling is a way of drilling by installing the rock drill with impact effect on the top of the drill rod, directly impacting the drill rod, and transmitting the impact energy to the drill bit through the drill rod. 2.2 Cutting drilling principle The cutting drilling principle is shown in Figure 3. The cutting principle is applicable to drilling in soil or soft rock. The equipment for drilling by cutting method includes cutting drilling rig, rotary drilling rig, coal power station, coal mine roof bolter, etc. Because the cutting action is produced primarily by rotational torque, it is also referred to as rotary cut drilling. 2.3 Principle of rolling and drilling The rolling principle is applicable to the drilling of rocks below medium hardness. The roller drill applies the rolling principle to the drilling. The drilling process of the roller bit is shown in Figure 4. The drill is connected to the roller cone bit through the drill rod, and the drill rod is used to pressurize the bit into contact with the rock. At the same time, under the rotating action of the drill pipe, the cone with column teeth on the drill bit rolls, and through the column teeth in contact with the rock,mining drill bit, the vibration impact and press-in force are transmitted to break the rock. This kind of drilling method is a combination of vibration impact crushing action and shear crushing action, so it is called rolling drilling, because the cone rolls on the rock, it can also be called rolling drilling. Coal mine roadheaders and tunnel boring machines all use the principle of rolling and crushing rocks. 2.4 Vibrating drilling principle The principle of vibration drilling is shown in Figure 5. Vibration drilling is applicable to drilling in soil or soft rock. The equipment for vibration drilling includes sonic drill, ultrasonic rock drill, etc. 2.5 Combined action of multiple principles Percussive, cutting, rolling, and vibrating methods are the four basic ways to drill holes in rock or soil. Actual drilling equipment is generally a combination of several principles. For example, hydraulic rock drill drilling is mainly based on impact action, supplemented by cutting action. Sonic drilling is based on the principle of vibration and the combined action of vibration, rotary cutting and rolling. 03. Difference between drilling, perforation and rock drilling 3.1 Drilling Whether it is earthwork, tunnel engineering or mine excavation engineering; whether it is impact, cutting or vibration, as long as it is a drilling operation, it can be called drilling. 3.2 Perforation In rock excavation operations in open pit and underground mines, boreholes may also be referred to as perforations. 3.3 Rock drilling Percussion drilling and percussion-based drilling operations can be called rock drilling. Equipment using other drilling principles, such as cutting and vibrating drilling operations, cannot be called rock drilling. 04. Definition of down-the-hole hammer, rock drill and power head 4.1 Definition of down-the-hole impactor As the name implies, mining dth bit ,dth rock bit, the down-the-hole impactor is a tool that uses the principle of down-the-hole impaction to drill holes. Down-the-hole impactor is called impactor, 06. Sum up The names of commonly used drilling equipment are arranged as follows: (1) Fixed drilling equipment can only be called drilling rig; (2) The drilling equipment using the roller bit can only be called a roller drill; (3) Rotary cutting drilling equipment shall be called drilling rig, such as cutting drilling rig and rotary drilling rig; (4) Equipment using power head for drilling shall be called drilling rig, such as pipe shed drilling rig and top drive drilling rig; (5) Down-the-hole percussive drilling equipment should be called down-the-hole drill; (6) Open-air top hammer percussive drilling equipment should be called open-air top hammer drilling rig; (7) Tunnel and underground top hammer percussive drilling equipment should be called rock drilling jumbo; (8) Drilling equipment modified from automobiles should be called drilling rig; (9) If the traveling speed is very slow, such as less than 10KM/H,rock drilling tools, it should be called a drilling rig. Thank you for reading, remember to press the official account! Return to Sohu , see more Responsible Editor:. wt-dthtools.com

Additional Details