Necessity of cable intermediate explosion-proof box in electric power transportation

In electric power transportation, due to the limited length of cables, it is necessary to connect one cable to form a complete circuit system, and we usually use cable intermediate joints (cold shrink intermediate joints, heat shrink intermediate joints) when connecting cables. connector) as a connection medium. The main function of the cable intermediate joint is to seal the cable to ensure the safety of the cable connection and the compatibility of the electric field.

When the cable leaves the factory, both ends are sealed, but the ends are cut open when connecting, which destroys its sealing. If the end of the cable is not sealed or the quality of the cable head is unqualified, the cable head will leak oil, and finally the insulating oil will dry up, the insulation performance will be greatly reduced, and the safe operation of the cable will be affected. In addition, the cable paper has strong water absorption and is very susceptible to moisture. If the cable is poorly sealed, moisture penetrates into the inside of the cable, which will also reduce the insulation performance and affect the safe operation of the cable. Therefore, the cable head is the weak link in the cable line, and it is the frequent point of cable line failure. Therefore, we need to use another set of cable connection protection parts (cable intermediate joint explosion-proof box) to double-layer protection for the safety and smoothness of electricity during transportation.

smc cable explosion-proof box description

1. Jiuwei smc series cable explosion-proof box is made of high-strength composite material SMC, which is formed by forging and pressing at one time. It has no weak points and has strong explosion-proof ability. When an accident occurs in the middle end of the cable and an explosion occurs, the high-pressure airflow, flame and debris generated by the explosion can be confined in the explosion-proof box, avoiding the expansion of the accident and preventing secondary disasters.

2. Corrosion resistance and long life: The shell of the smc cable explosion-proof box has good corrosion resistance, which can effectively resist the corrosion of water, alcohol, electrolytic salt, acetic acid, hydrochloric acid, sodium-potassium compounds, asphalt, various acid-base soils, and acid rain . The product itself has good anti-aging performance, and the product surface has a protective layer with strong UV resistance. The double protection makes the product have higher anti-aging performance; suitable for all kinds of bad weather, at -50℃~+150℃ In the environment, it can still maintain good physical and mechanical properties.

3. The material used has super flame retardant ability. When an accident occurs in the middle of the cable and a fire occurs, this product not only has super flame retardant ability, but also ensures that the temperature of the shell will not rise basically, so as to protect the adjacent cables from being scalded.

Characteristics of explosion-proof box for cable intermediate joint

1. The cable explosion-proof box is made of FRP material, with high mechanical strength, good pressure resistance, high strength, good toughness, and strong explosion-proof performance.

2. The main function is to protect the cable from being crushed, and the other function is insulation. The shell is sprayed with black anti-corrosion and fire-proof material, and the interior adopts heat-insulating flame-retardant film, double-layer protection, and at the same time, the insulation performance is strengthened.

3. In the event of an accidental explosion of the cable joint, a reliable fire compartment is formed, which can effectively prevent the fire from spreading and burning, and effectively prevent the accident from expanding.

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