Mine hose assembly with coal safety standard (MA certification) is a specialized transmission component developed and produced in strict accordance with coal mine safety standards (MA certification) and safety inspection requirements for mine products. It is an indispensable core equipment for comprehensive coal mining, tunneling, ventilation and other operations underground coal mines. It is mainly composed of
mine hose main body, special joints and seals, which have passed strict safety performance tests, with complete coal safety certification qualifications, and can be legally and compliantly used in various harsh working conditions underground coal mines. The hose assembly is suitable for the transmission of emulsion, high-pressure water, compressed air and other media underground coal mines, with a working pressure of up to 38MPa and above, an inner diameter covering DN5-DN127, and a working temperature range of -40℃ to 100℃ (for air medium transmission, it is suitable for -30℃ to 50℃). The burst pressure is not less than 4 times the working pressure, fully complying with the management requirements for safety inspection of coal mine safety products, and eliminating potential safety hazards in underground transmission from the source.
Its structural characteristics meet the harsh working conditions underground coal mines and the strict requirements of coal safety standards, adopting a multi-layer composite reinforcement structure, balancing safety performance and durability, with each layer having a clear division of labor and cooperative protection. The inner tube is made of a special synthetic rubber formula resistant to emulsion and high pressure, processed by special technology, with excellent oil resistance, wear resistance and weak acid and alkali resistance. It can withstand the scouring and erosion of emulsion, high-pressure water and compressed air underground coal mines for a long time, avoid aging, cracking and damage of the inner rubber, ensure the tightness of medium transmission, and prevent safety accidents caused by leakage. The reinforcement layer, as the core force-bearing structure, can adopt 1-2 layers of steel wire braiding or 4 layers and above of steel wire winding process according to working condition requirements. The steel wire is made of high-toughness and high-strength galvanized material, with uniform winding or braiding density and consistent tension, which greatly improves the high-pressure resistance, pulse resistance and tensile resistance of the hose assembly, adapting to frequent pressure fluctuations and mechanical pulling conditions underground coal mines. The outer cover is made of wear-resistant, anti-static and flame-retardant synthetic rubber, added with anti-aging and anti-ozone additives, which can not only effectively resist wear caused by underground dust, mechanical friction and rock impact, but also meet the anti-static and flame-retardant safety requirements underground coal mines. At the same time, it has good flexibility, which is convenient for installation and laying in narrow underground spaces, protecting the inner structure from damage and extending the overall service life. The joints are made of special carbon steel or stainless steel for mines, treated with anti-corrosion, and adopt an integrated pressing process with the hose main body, with firm connection and reliable sealing, adapting to the high-humidity and dusty corrosive environment underground mines, eliminating the hidden dangers of joint falling off and leakage, and complying with the safety requirements of coal safety standards for mine accessories.
In terms of operating conditions, the
mine hose assembly with coal safety standard is mainly suitable for various underground coal mine operation scenarios. With complete coal safety certification and excellent performance, it has become an important guarantee for safe coal mine production. In the comprehensive coal mining face, the hose assembly can be used for the transmission of emulsion in hydraulic supports, adapting to the high-pressure, high-dust and frequent vibration working conditions underground, withstanding mechanical collision and friction, ensuring the stable operation of hydraulic supports and helping the efficient development of coal mining operations. In the tunneling face, it can be used for the transmission of high-pressure water and compressed air in roadheaders, rock drills and other equipment, adapting to the narrow tunnel and frequent rock impact working conditions, ensuring the normal operation of tunneling equipment. In the coal mine ventilation and drainage system, it can be used for the transmission of high-pressure water and compressed air, adapting to the harsh underground environment with high humidity and high dust, resisting dust erosion and medium corrosion, and ensuring the continuous and stable operation of the ventilation and drainage system. In addition, the hose assembly can also be used for the transmission of media in other hydraulic equipment and pneumatic equipment underground coal mines, adapting to the needs of different types of mine equipment. It can be customized into full specifications of DN5-DN75 according to working conditions, among which the specification above φ32 can be fixed at 20 meters, and the specification below φ25 can be continuously laid up to more than 100 meters. Each assembly has passed pressure test, sealing test and safety performance test, with traceable quality, fully complying with coal safety standards and safety inspection requirements for mine products, and is a trusted choice for safe and efficient transmission underground coal mines.
