Mine Communication Cable - Helper for Mine Operation
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The underground space in the coal mine is small and the air is damp. There is a danger of coal dust and gas explosion. Therefore, the requirements for the middle connector of the cable are high. The use of heat shrinkable communication cable intermediate joints, due to the need for open flame heat shrinking, is extremely inappropriate for underground coal mines. The middle connector of cable made by watering with epoxy resin is large in size, not suitable for laying in the narrow underground space, and some also need to install the grounding system. The cold shrinkable intermediate joint has many advantages, and the installation does not require special tools, which is simple and quick. Short production time. Do not use open flame, safe and reliable. The cable body has a long-term radial pressure, and is wound with a waterproof tape that is breathable with the cable, and has good sealing and waterproof performance to ensure long-term reliable operation.
The outermost layer of the mining communication cable is generally a rubber or rubber composite sleeve. The role of this layer is insulation. It also protects the cable from harm. The role of mine cable shield: mining cable through the current is relatively large, the current around the magnetic field will be generated in order to not affect other components, so add shielding layer can shield this electromagnetic field in the cable. In order to achieve a certain degree of grounding protection, if there is damage in the cable core, the leaked current can be shielded from the laminar flow, such as the grounding grid, and play a role in security protection.
Mining communication cables are used for underground mine monitoring, monitoring, and track transportation systems as information transmission lines, and also for communication systems for information transmission. The underground space in the coal mine is small and the air is damp. There is a danger of coal dust and gas explosion. Therefore, the requirements for the middle connector of the cable are high. The use of heat shrinkable communication cable intermediate joints, due to the need for open flame heat shrinking, is extremely inappropriate for underground coal mines. The middle connector of cable made by watering with epoxy resin is large in size, not suitable for laying in the narrow underground space, and some also need to install the grounding system. The cold shrinkable intermediate joint has many advantages, and the installation does not require special tools, which is simple and quick. Short production time. Do not use an open flame, safe and reliable. The intermediate joint shall have an armored belt with good mechanical strength as the outer layer protection, and the outer protective sleeve shall have the same mechanical strength as the metal armoring of the cable. A five-layer armored belt with a diameter of about 8 cm is completely cylindrical and can withstand a pressure of 1.2 kN without deformation or looseness.
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