Safety technical measures for underground coal mine welding
2. The electric welding equipment should be handled lightly during transportation. It is strictly forbidden to collide and apply oil, and protect the cable. When transporting oxygen and acetylene bottles, they must be handled gently. It is strictly forbidden to strike sharply. The cylinders must be placed in the upper and lower layers of the cages. It is strictly prohibited to be placed in the same layer. When the manual trolley is used, the two cylinders should be placed in the two vehicles and fixed, and the two vehicles should be kept at a distance of more than 10 meters. 3. Before the construction, carefully check whether the oxygen, acetylene pipeline and pressure reducing valve are in good condition, and reach the qualified airtightness. The valves are flexible and closed tightly. The electric welding machine insulates the strands well and does not leak electricity. 4. The acetylene bottle must be equipped with a protective cover and a tempering backstop. The pressure on the low pressure side of the acetylene bottle pressure reducing valve shall not exceed 0.15 Ma, and the oxygen flow rate shall not exceed 1.5-2. The oxygen side pressure does not exceed 1.5. 5. The fire source used in gas welding is only allowed to be carried by the person in charge of the construction. Other personnel are strictly prohibited from carrying the ignition items to the well. 6, the welding site should maintain normal ventilation, ventilation can meet the requirements before welding. 7. The person in charge of welding must wear a gas portable instrument. Before and during the welding operation, the part-time gas crew should carefully check the gas concentration at the site. When the gas concentration is lower than 0.5%, the welding can be carried out; otherwise, measures must be taken to strengthen the ventilation. If the gas concentration is less than 0.5%, the welding work can be carried out. 8. When welding, you should wear a variety of protective equipment, wear well-insulated gloves in strict accordance with operational requirements. 9. The welding location should be equipped with special and reliable sprinkler pipes and long enough hoses and fireproof rafts, no less than 0.2m3 of spun yarn, 2 sets of dry powder fire extinguishers and other fire-fighting equipment and supplies. 10. Before burning, thoroughly clean the inflammable and explosive materials within 10 meters of the welding location, and thoroughly sprinkle the construction site during the welding. 11. The welding machine must be equipped with a full-time electrician to strictly control the power transmission system. The voltage of the welder should match the voltage of the power supply. 12. When welding, the distance between the two bottles must be greater than 5m, and the distance between the two bottles and the open flame is greater than 10m. 13. When welding, acetylene bottles and oxygen cylinders should be fixed firmly to prevent dumping. It is strictly forbidden to lay down. During the electric welding operation, it is strictly forbidden to pull, pull, squeeze the manifold and damage the sub-line, damage oxygen, acetylene table, etc., to prevent all kinds of accidents. 14. The tools carried by the welding personnel shall be strictly kept and shall not be placed or transferred to others. 15. During the welding process, the cable must be protected and the cable and other objects must not be damaged. In the course of work, it is necessary to contact the driver of the small winch. When driving, the staff should be evacuated to a safe place; when welding, it is strictly prohibited to drive. 16. After the welding is completed, all the tools and equipment should be raised to the well, the site should be cleaned up, and the site should be sprinkled again. The fire extinguishing should be completely eliminated. A special person should be sent to the site for 1 hour, and the abnormality is immediately processed to confirm that there is no problem. Can leave. 17. All construction personnel are allowed to construct only after learning the measures and signing. 18. Other unfinished matters shall be implemented in accordance with the “Safety Regulations for Coal Mines†(2010 Edition) and relevant regulations. Double-table Fiber Laser Cutting Machine Double-Table Fiber Laser Cutting Machine,Small Fiber Laser Cutting Machine,Fiber Laser Metal Cutting Machine,Fiber Optic Laser Cutter Jiangsu Dajin Laser Science and Technology Co., Ltd , https://www.ledanlaser.com