Fire detection pipe automatic fire extinguishing device used in alternating-current and direct-current power system in transformer substation

Abstract

The utility model relates to an automatic fire extinguishing device for a fire detection tube used in an AC and DC power supply system in a substation, belonging to the field of fire protection. The gas fire extinguishing agent bottle is set near the AC and DC power supply cabinet or control cabinet in the substation; the fire extinguishing agent bottle is equipped with a weighing device to weigh the weight of the fire extinguishing agent in the bottle in real time; When a fire breaks out in the protected object, the fire detection tube above the protected object will melt and explode at the point where it first reaches the melting point, and the gas fire extinguishing agent in the fire detection pipe will be released, and the fire extinguishing agent release valve will be activated, and the fire extinguishing agent bottle will flow from the fire extinguishing agent bottle immediately. The gas fire extinguishing agent is continuously released in the fire detection tube, and the non-submerged fire extinguishing agent release mode is adopted. The gas fire extinguishing agent is sprayed from the melting blast hole of the fire detection tube to the root of the fire source, and the fire source is effectively extinguished instantly, and the protected object The flame just generated due to over-current or over-temperature is extinguished in the bud, and at the same time, the passive alarm contact in the weighing device is closed, and an alarm signal is output to the outside.

Description

technical field [0001] The invention belongs to the field of fire protection, in particular to an automatic fire extinguishing device used for AC and DC power supply systems in substations. Background technique [0002] The design of my country's substation fire alarm system requires that smoke detectors or smoke detectors be installed in each fire prevention area according to the "Code for Fire Protection of Thermal Power Plants and Substations" (GB50229-2006) and "Code for Design of Automatic Fire Alarm Systems" (GB50116-2013). Gas-type smoke detectors; the design of substation fire-fighting systems requires that fire-fighting equipment such as mobile fire extinguishers and yellow sand boxes be arranged in appropriate places according to the "Code for Design of Building Fire Extinguishers Configuration" (GB50140-2005). [0003] In the substation, currently only the "main transformer" with a capacity of 125MVA and above (in a substation, the transformer with the same voltage...

AI Technical Summary

Problems solved by technology

[0011] However, the fire detection tube in this technical solution is coiled on the object to be protected, which is not suitable for high-voltage electrical equipment (because there is a problem of high voltage insulation from the ground). In addition, the technical solution is located in the space where the object to be protected The fully submerged spraying is used in the system, and dry powder is used as the fire extinguishing agent, which has the disadvantage of a large amount of cleaning work after the event. For some precision power equipment and switchgear / control cabinets with complex structures in the substation, this cleaning work is performed at the equipment operation site (substation , power distribution station) is actually impossible to complete, and only after the equipment is transported to a special maintenance site or the manufacturer for disassembly, cleaning, reassembly, and relevant tests can it be put into use again. First, it is necessary to increase the number of equipment operating sites The second is that the maintenance cost is almost equal to the new installation of the same equipment (even higher), which is not conducive to reducing the operating cost of the power transformation and distribution operation unit and the power operation department. The third is to use dry powder for full submersion spraying, It is easy to cause personal injury to the staff at the accident site or entering the accident site, which is not conducive to environmental protection

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