Production technology of environment-friendly type inorganic mineral-insulated, water-blocking and fireproof cable with flexible jacket

Abstract

The invention discloses a production technology of an environment-friendly type inorganic mineral-insulated, water-blocking and fireproof cable with a flexible jacket. The production technology is characterized in that a finished product is obtained through wire drawing, wire stranding, cable forming, and joint coating; in the wire drawing process, a deoxidized arsenic and phosphorous-free copper strip is adopted, and a conductive wire core is a flexible wire core; an insulation wire core of the formed cable is prepared from ethylene propylene diene monomer rubber, POE (polyolefin elastomer) elastomer, double-layer mica insulation material, paraffin oil, stabilizer, activator, coupler, anti-aging agent 4010A, rare earth, active kaolin and stearic acid, a wrapping tape adopts a modified polyvinyl chloride plastic bag, and a filling rope adopts a modified polypropylene tearing film rope; a joint water-blocking material is prepared from acrylic acid super absorbent fiber, polyvinyl chloride fiber and basic fiber according to the mass ratio of 2 to 1 to 1, and is coated onto the cable joint, so as to obtain the finished cable. The environment-friendly type inorganic mineral-insulated, water-blocking and fireproof cable with the flexible jacket has the advantages that the environment-friendly effect is realized, the flexibility is good, the insulation property, water-blocking property and fireproof property are realized, and the like; the cable can resist the high-temperature and high-humidity use environment of mines; the safety coefficient is high, and the popularizing value is higher.

Description

technical field [0001] The invention relates to the technical field of cable processing, in particular to a production process of an environmentally friendly flexible sheathed inorganic mineral insulated water-blocking and fire-proof cable. Background technique [0002] Flexible cables used in mines have corresponding requirements for their flexibility and flame retardancy. At present, rubber cables are widely used in mines due to their good characteristics in flexibility and flame retardancy; however, rubber cables have certain Flame retardant performance, but when it is heated and decomposed during ignition, it will produce a large amount of toxic gas and form thick smoke, which not only affects rescue work and personnel evacuation, but also causes suffocation of underground workers; cables for mines also need to have insulation, and insulated cables generally It is composed and processed of copper conductor, inorganic insulating material and copper sheath. The inorganic i...

AI Technical Summary

Problems solved by technology

[0002] Flexible cables used in mines have corresponding requirements for their flexibility and flame retardancy. At present, rubber cables are widely used in mines due to their good characteristics in flexibility and flame retardancy; however, rubber cables have certain Flame retardant performance, but when it is heated and decomposed during ignition, it will produce a large amount of toxic gas and form thick smoke, which not only affects rescue work and personnel evacuation, but also causes suffocation of underground workers; cables for mines also need to have insulation, and insulated cables generally It is composed and processed of copper conductor, inorganic insulating material and copper sheath. The inorganic insulating material currently used is usually magnesium oxide powder; this type of cable has many superior properties that cannot be compared with ordinary high polymer cables. Coal The new industry standard MT818-2009 was officially implemented on July 1, 2010. Compared with the old and new standards for mining rubber sheathed cables, the insulation resistance index related to the performance of the insulation layer has been significantly improved, with an average increase of about 50%; at present , Domestic mining rubber sheath cable insulation materials generally use cross-linkable EPDM rubber; and because the supply and demand relationship has been in a tense state, the price of EPDM rubber has been rising year by year, making the cost of production enterprises rise too fast; In addition, the coal mine working face environment is humid and full of water vapor. During the actual use of optical cables, there is often moisture infiltration at the cable sheath and joints. When this type of cable is laid under a humid area, the moisture will change the capacitance. Reduce the signal strength, and the entry of water will also cause other problems, which will corrode the metal parts inside the cable. Therefore, people will add a water-blocking coating material between the cable sheath and the wire. The existing technology is generally Gasoline glue or water-blocking yarn is used, but these two types of methods consume a lot of energy during the preparation process, pollute the environment, and increase production costs; water-blocking resin compositions are also used, but there are still technical difficulties in processing and cannot be mass-produced ; Therefore, there is an urgent need to design and study a production process of an environmentally friendly flexible sheath inorganic mineral insulation water-blocking fireproof cable to solve the above problems