Principles of laying underground air ducts

Funing county changhuan telescopic cylinder factory

1. The pipe rammer is responsible for the installation, transportation, maintenance and removal of rammed pipes within his jurisdiction. Recover the unused or damaged air duct into the well in time, and repair the damaged air duct up and down the well in time. 2, must bring enough necessary appliances and materials, must be familiar with their own in charge of the regional tunneling faces, such as ram diameter, length, roadway tunneling speed or breakthrough date, etc. 3, ram hanging to flat, straight, tight, stable, avoid cutting, blasting collapse, must be hung every ring. Every section is hung with an iron hammer! Point, the end hook at both ends of each ram should be tied to the roadway wall with wire. 4, the interface between the ram is required to be close. Colloidal air duct can adopt double-sided joint or three-ring joint, which should be connected in sequence when plugging. 5, when using rubber ram, there should be a section of iron ram transition between local ventilator and rubber ram. The joint between the local ventilator and the iron air duct should have a washer and be fastened with screws; The joint of iron air duct and colloid air duct shall be securely tied with iron wire. 6, ram diameter list should be consistent; If the diameters are different, there should be a transition section. 7, the distance from the end of the ram to the working face, according to the provisions of the Mining Bureau, but must ensure that the working face has enough air volume. 8, regularly check the downward flow of the shaft, if there is a crack to repair at any time, don't leak. 9, ram in the corner to set an elbow or turn slowly, are not allowed to turn to death. Tee should be set at the bifurcation. 10, inclined lane and vertical shaft excavation, ram joint, ram binding to be particularly strong. 1 1. When replacing the ram, it is not allowed to stop the local ventilator at will. If parking is necessary, you should contact the team leader and driver of the heading face, and you can only replace it after stopping work and withdrawing personnel. When the amount of gas gushed from the roadway is large, the working face personnel must evacuate to a safe place before replacing the ram. 12, after the completion of roadway excavation, ram should be removed in time under the command of ventilation area. The dismantled air duct should be loaded and transported to the well for cleaning, drying and maintenance. 13, when dismantling the ram, dismantle it from the inside out in turn. When the tunnel ram is dismantled, the local ventilator shall not be stopped. 14, attention should be paid to prevent the moving car from hitting, squeezing and cutting the ram. 15, cross belt conveyor, scraper conveyor operation, you must first contact the conveyor driver, if necessary, you can suspend the conveyor operation to ensure safe operation. 16, alleys high roof homework to set up a bench, to stand firm at work; When the air duct is hung in the roadway where the electric locomotive is running, safety precautions must be set to prevent it from being cut and hit by trams, and attention should be paid to prevent the overhead line from getting an electric shock and hurting people. 17. When the draw-out ventilation mode is adopted, the air duct can be made of hard air duct and rubber or plastic telescopic air duct with steel wire skeleton. Plastic or rubber air ducts must have antistatic and flame retardant safety performance. 18. When installing the steel wire skeleton air duct, handle it with care during loading and unloading, and prohibit sharp objects from radial extrusion and collision to avoid deformation and damage. 19. When connecting the air ducts with the quick connector soft belt, the end rings of the two air ducts should be aligned and connected. After the cloak cloth is erected, the two end rings should be clamped with the quick connector soft belt. The tension of the joint soft belt should be appropriate to avoid air leakage or falling off, and the handle position of the joint soft belt should be downward on the side of the ram. 20. When connecting the air duct at the end (air inlet) of the air duct, hang the connected air duct on the steel strand first, and then connect the joint to avoid the air duct from bending and folding. 2 1, the sharp corners of the ram must be connected with hard arc elbows. 22. When dealing with the accumulated water in the air duct, when the length of the air duct exceeds 500 meters, the soft belt drainage of the quick connector can be directly untied; When dealing with the accumulated water in the air duct within 500 meters, the safety window of the local ventilator must be opened first, and then the joint drainage can be untied. 23, using the extraction or mixed ventilation mode, the distance from the outlet or inlet of the ram to the working face, and the length of the overlapping section between the compressed ram and the extraction ram should comply with the provisions of the mine operation procedures. 24, ram on the well, first of all, should be scrubbed, dry, check the damage and durability of ram, and then processed according to the inspection. 25. When repairing rammer, sticky rammer mortar shall be prepared as required. Cut the patch according to the size of the breach, and the patch should be round; Patch blank holder should be greater than the breach size of 20mm；; In order to prevent the edge from warping after patching, the patched edge should be cut into inclined planes; Patches and cracks should be brushed clean to show the true color of rubber duct, and then coated with mucilage after drying for bonding. After the patch is bonded, it should be tamped with a wooden hammer to make it tightly bonded to ensure no air leakage. The glued ram should be coated with talcum powder again. For large cracks exceeding 100 mm, they must be stitched with thread before gluing. 26, the rings on the ram should be complete, the ring spacing should ensure that the ram is hung straight, and the iron rings at both ends should be stitched tightly. If long wind pipes need to be added, the width of adhesive between air pipes is generally 200mm. 27, repaired ram should be properly preserved, stored ram should be dried once every quarter. 28, making tee, elbow and transition section, according to the shape and diameter of the ram, pay attention to the straight. The length of transition section should not be less than 2m. 29, when welding ram ring, according to the relevant provisions of the welder. The ring should be welded firmly, smoothly and roundly. 30, drying, washing, cleaning the ram to wear a mask, ram must be dried or blow-dried rear can glue. 3 1, the modified old ram should be stored in the designated place according to the specifications and sizes, and marked for easy access. 32. Pay attention to safety when loading and unloading the ram, so as to prevent the wire cutter from pricking his feet and hurting his eyes. 33. When repairing the ram, a local ventilator should be prepared to dry the ram, and a sewing machine and repair tools should be prepared. 34, gasoline, glue must be stored in a separate room, and should keep the oil drum tightly, it is forbidden to fireworks. 35, ram repair indoor prohibit the use of stoves to keep warm; If it must be used, there should be safety and fire prevention measures, and with the approval of the relevant units, the stove should be extinguished when no one is on duty. 36, ram repair room must be equipped with fire fighting equipment, do a good job of fire prevention, indoor to keep clean and hygienic. 37. The operation and precautions of the electric sewing machine are as follows: (1) The electric sewing machine must be installed with good insulation to prevent electric leakage from hurting people; (2) Sewing machine users must be trained and master the machine performance before they can operate independently; (3) Before using the sewing machine, check whether all parts are in good condition and whether the rotation is flexible; (4) All oil holes should be properly oiled before use and refueled at any time during use; (5) When using the sewing machine, gloves should not be worn, and the distance between the hand and the needle must be greater than 60mm. The upper and lower lines should be uniform, and a certain speed should be mastered to prevent hand stabbing; (6) If there is any fault in use, stop using it immediately and use it after troubleshooting; (7) When the machine head needs to be disassembled during the repair process, be careful not to lose parts; (8) When changing shifts, the machine should be wiped clean; When a fault occurs, if this shift cannot be completely handled, it should be explained in detail to the next shift so as to continue the handling. 38. The operation, use and precautions of the air cleaner are as follows: (1) There must be a special person in charge, and the operator must first master the operation method; (2) Before working, check the machine's good condition before operating and turning on the power supply. (3) Operators must wear rubber shoes, insulating gloves and working caps, and dress neatly to prevent electric shock and clothes and objects from being involved in the machine; (4) When starting to work, first put the clutch handle in the control position (i.e. working state) and tighten it; (5) When opening the shell, both hands should be flat and pushed upward. After opening the outer shell, if the position of the inner shell is not suitable, shake the worm gear device by hand to make the inner shell rotate to a suitable position, instead of directly rotating the inner shell by hand; (6) After the inner shell is opened, water should be added again, and the appropriate amount of water should be added, which is generally two-fifths of the whole machine. After adding water, put the ram to be cleaned into the machine. Generally, when cleaning the ram with a diameter of 500-600 mm, put 1 section, and put 2 sections for the ram below 500 mm; (7) After placing the ram, cover the inner shell first. The inner shell must be tightened and covered tightly to prevent the ram and water from being thrown out and accidents. After the inner shell is covered, cover the outer shell and tighten the cover. (8) After the inner and outer housings are covered, turn the clutch handle to the separation position, that is, the "0" position; (9) After confirming that the machine can be turned on, a special person shall be responsible for power transmission, and the power transmission personnel must wear dry insulating gloves before power transmission. Power on first, and then start the machine. When starting the machine, all operators should stay away from the machine. (10)) After washing 10- 15 minutes, the power supply will be cut off. After the rotation stops smoothly, the operator can only get close to the machine, and it is forbidden to send electricity at this time; (1 1) The operator takes out the air duct in turn, presses the drainage device, discharges the dirty water and replaces it with clean water.