2. If it is found that there is abnormal pressure such as pressure rock, sudden increase in water volume, or abnormal gas emission during coal rock loosening, sheeting, pressure or drilling, it is necessary to stop drilling and report to relevant departments in time.
3. Drill the eye strictly according to the calibrated eye position and the angle, depth and number of the blasthole specified in the instructions. Any blasthole that has been drilled or failed in each other must be re-drilled.
4. When you drill your eyes, you should pay attention to the coal rock gang and roof at any time. If you find that there is a danger in the gang or roof, you must stop the drilling immediately.
5. When drilling the hole, do not swing the drill pipe up and down or left and right to keep the drilling direction; do not stand under the drill pipe to prevent the drill pipe from breaking and hurting people. 6. When opening the eye, the pneumatic drill control valve should be opened to the light running position. After the eye position is stable and drilled 20-30 mm, the steering handle is pulled to the middle running position until the drill bit is not easy to get out of the eye. Drill at full speed.
7. When there is a sudden stop of the wind or water stop, the wind drill should be removed, the drill pipe pulled out, and the drilling of the hole stopped.
8. During the construction, strictly implement the knock-on top system. Before starting work, before drilling, after shooting, before the support, you should carry out the work of knocking and asking for the top, and timely handling the dangerous rock.
9. When drilling the bottom hole of the inclined roadway working face, when the drill pipe is pulled out, the eye stick should be blocked with a wooden stick in time to prevent the coal rock powder from clogging the eye port.
10. When drilling the eye on the upper working face with a large inclination, secure and reliable scaffolding should be provided. If necessary, the staff should wear a safety belt. A baffle must be installed in the roadway to prevent people from sliding down and rolling in coal and rock, and to fix cables, winds and water pipes.
The three is a pipe fittings and a pipe connection. It is also called pipe fittings three or three way fittings, and three way joints are used in the main pipe to branch.
The three link is with three ports, namely, an import, two exits, or two imports, a chemical pipe for an outlet, a T and a Y shape, an equal diameter pipe and a different diameter pipe, used in three same or different pipeline collection. The main function of the three pass is to change the direction of the fluid.
Classification according to the size of pipe diameter:
1, the ends of the ends of the equal diameter three links are all of the same size.
2, the diameter of the three way main pipe takes the same size, and the size of the branch pipe is smaller than the nozzle size of the main pipe.
Material division:Carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, PVC and so on.
Dividing by making methods:top making, pressing, forging, casting, etc.
Dividing by manufacturing standards:National standard, electric standard, chemical standard, water mark, American Standard, German standard, Japanese standard, Russian standard and so on.
Pipe Tee,Tee Pipe Fittings,Pipe Fitting Tee,Steel Pipe Tee
Cangzhou Sailing Steel Pipe Co., Ltd , https://www.ghpipefittings.com