· The camera must be protected in an explosion-proof protective cover. The protective cover should also have a certain explosion-proof rating according to the needs of the environment;
· In the explosion-proof demand, infrared LED lighting camera is not suitable as a night vision monitor for low-light source;
In the mine explosion-proof zone, all pipelines except the grounding line and buried underground pipeline must be configured with metal galvanized steel pipes;
• If it is a rotary camera, it must be an explosion-proof pan/tilt or integrated explosion-proof structure.
· The camera must be installed with a grounding wire, either outside the well or in the well, so as to prevent the current generated by the leakage from causing explosion or explosion;
· Explosion-proof piping must be provided with a drainage device to prevent the condensation of water inside the pipe causing corrosion of the pipe wall;
• Do not use explosion-proof isolating joints (DRAIN) between the metal explosion-proof pipe and the metal galvanized pipe joint, and fill in the explosion-proof insulating adhesive (or explosion-proof pipe sand filler). The explosion-proof pipe sand filler fills in the pipe and enters at least the table The length of 45 cm (18 inches) is filled with the explosion-proof effect isolation to prevent the spark explosion caused by the short circuit in the pipeline;
Equipment and metal galvanized pipe or hose joints need to use explosion-proof isolation joint isolation;
• Explosion-proof zones and non-explosion-proof zones must also be isolated with explosion-proof isolation joints (Figure 2).
• All the pipes entering the equipment should be constructed as far as possible from the equipment or under the explosion-proof box to prevent the pipes from loosening or entering the water.
· The power line and video signal and the lightning protection grounding line must be in charge of configuration so as not to cause backfire to damage the device or cause explosion;
• The joints in the explosion-proof terminal equipment connection box must be lockable or screw terminal-fixed to prevent the circuit from coming off, especially if the power supply part causes spark explosion;
· The image doors of the camera terminal explosion-proof box are mostly fixed by screws. After the equipment is calibrated, it must be clockwise against the clockwise direction. The fixing screws should be tightened one by one to balance the pressure of the cover to avoid the airtightness caused by poor sealing. Gas explosion
• The system ground must use a point grounding method. Copper wires shall be used for grounding, and closed loops shall not be formed, and shall not be mixed with high-current power grounds.
When the explosion-proof monitoring system adopts an independent grounding device, its grounding resistance must not exceed 4Ω (refer to the national regulations);
• If optical cable transmission is used in a coal mine, the optical transceiver housing on each well should be grounded and it is best to connect it to a device such as a camera. If the cable racks in the pits are connected, each slot should be grounded to ensure safety.
• Equipment that is most vulnerable to lightning strikes in coal mining areas is a front-end camera. If it is installed outside the well, the equipment must be equipped with lightning rods.
The above are the matters needing attention and measures for the construction and installation of coal mine safety monitoring. Because coal mines are always filled with dangerous factors such as methane and coal dust explosions, there are also some mines that attempt to transmit wirelessly and mobile monitoring systems are beginning to enter coal mine safety surveillance. The video signal and the camera power supply are shared cable transmission. The camera itself has an ultra-high brightness LED white light. It is suitable for use under poor lighting conditions in underground mines or in non-illumination environments. It can take clear images under low illumination conditions, making coal mine safety monitoring. It can be more safely applied to the working area of ​​the deepest mining face of the coal mine, providing a broader security guarantee for safety monitoring under the mine. As for the digitization of coal mine safety monitoring, there are currently some coal mines that are connected to the local area network through switches. They also exchange local area networks through coal mines with existing twisted-pair cables and Ethernet switches, or use fiber optic Ethernet to exchange local area networks. The safety monitoring of coal mines has also gradually entered the all-IP networked field during the construction and installation phase.
· In the explosion-proof demand, infrared LED lighting camera is not suitable as a night vision monitor for low-light source;
In the mine explosion-proof zone, all pipelines except the grounding line and buried underground pipeline must be configured with metal galvanized steel pipes;
• If it is a rotary camera, it must be an explosion-proof pan/tilt or integrated explosion-proof structure.
· The camera must be installed with a grounding wire, either outside the well or in the well, so as to prevent the current generated by the leakage from causing explosion or explosion;
· Explosion-proof piping must be provided with a drainage device to prevent the condensation of water inside the pipe causing corrosion of the pipe wall;
• Do not use explosion-proof isolating joints (DRAIN) between the metal explosion-proof pipe and the metal galvanized pipe joint, and fill in the explosion-proof insulating adhesive (or explosion-proof pipe sand filler). The explosion-proof pipe sand filler fills in the pipe and enters at least the table The length of 45 cm (18 inches) is filled with the explosion-proof effect isolation to prevent the spark explosion caused by the short circuit in the pipeline;
Equipment and metal galvanized pipe or hose joints need to use explosion-proof isolation joint isolation;
• Explosion-proof zones and non-explosion-proof zones must also be isolated with explosion-proof isolation joints (Figure 2).
• All the pipes entering the equipment should be constructed as far as possible from the equipment or under the explosion-proof box to prevent the pipes from loosening or entering the water.
· The power line and video signal and the lightning protection grounding line must be in charge of configuration so as not to cause backfire to damage the device or cause explosion;
• The joints in the explosion-proof terminal equipment connection box must be lockable or screw terminal-fixed to prevent the circuit from coming off, especially if the power supply part causes spark explosion;
· The image doors of the camera terminal explosion-proof box are mostly fixed by screws. After the equipment is calibrated, it must be clockwise against the clockwise direction. The fixing screws should be tightened one by one to balance the pressure of the cover to avoid the airtightness caused by poor sealing. Gas explosion
• The system ground must use a point grounding method. Copper wires shall be used for grounding, and closed loops shall not be formed, and shall not be mixed with high-current power grounds.
When the explosion-proof monitoring system adopts an independent grounding device, its grounding resistance must not exceed 4Ω (refer to the national regulations);
• If optical cable transmission is used in a coal mine, the optical transceiver housing on each well should be grounded and it is best to connect it to a device such as a camera. If the cable racks in the pits are connected, each slot should be grounded to ensure safety.
• Equipment that is most vulnerable to lightning strikes in coal mining areas is a front-end camera. If it is installed outside the well, the equipment must be equipped with lightning rods.
The above are the matters needing attention and measures for the construction and installation of coal mine safety monitoring. Because coal mines are always filled with dangerous factors such as methane and coal dust explosions, there are also some mines that attempt to transmit wirelessly and mobile monitoring systems are beginning to enter coal mine safety surveillance. The video signal and the camera power supply are shared cable transmission. The camera itself has an ultra-high brightness LED white light. It is suitable for use under poor lighting conditions in underground mines or in non-illumination environments. It can take clear images under low illumination conditions, making coal mine safety monitoring. It can be more safely applied to the working area of ​​the deepest mining face of the coal mine, providing a broader security guarantee for safety monitoring under the mine. As for the digitization of coal mine safety monitoring, there are currently some coal mines that are connected to the local area network through switches. They also exchange local area networks through coal mines with existing twisted-pair cables and Ethernet switches, or use fiber optic Ethernet to exchange local area networks. The safety monitoring of coal mines has also gradually entered the all-IP networked field during the construction and installation phase.
The Pipe Anticorrosion Materials is a multilayer system used for the protection of steel pipelines. Liquid Adhesives can be used as primers for this system.In addition to serving as primers, these liquidadhesives themselves represent an anticorrosion layer and provide a uniformly smooth contact surface to promote high adhesion of the coating system to the pipe. They are designed for machine or brush application and formulated with stress-corrosion cracking inhibitors. The Anti-Corrosion layer0 is engineered to assure a high bond to the primed surface with excellent conformability characteristics. The mechanical protection layer ,achieves a complete bond to the inner layer, providing maximum handling and in-service protection for the coating system. The adhesives in these and all POLYKEN tape systems contain proven anti-microbial additives.
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