An anti-explosion foam spray fire extinguishing system

Abstract

The invention discloses an anti-explosion foam spray fire extinguishing system. The system includes a fire pump unit, a liquid storage tank, a foam proportional mixer, a liquid supply pipe network, a horizontal pipe, a pressure expansion pipe, and a water mist nozzle. The present invention adopts a retractable hidden arrangement, which significantly improves the reliability of the fire extinguishing system. The pressure expansion tube adopts a multi-stage sealing structure, which solves the problems of easy leakage, misoperation, immobility, and small applicable pressure range. The multi-section pressure expansion tube is used to spray the water mist nozzle close to the fire object, which solves the problems of the existing water mist nozzle with short range, insufficient penetration force, and easy to be affected by environmental wind and fire plume. The invention has anti-explosion, dust-proof, and high-temperature-resistant functions, is safe and reliable, has high fire extinguishing efficiency, long spraying time, is convenient to install and use, and has little influence on protected objects. The technical problems of fire fighting can be used not only for oil-immersed transformers in operation, but also for newly-built oil-immersed transformers.

Description

technical field [0001] The invention relates to a fixed fire extinguishing system, in particular to an anti-explosion foam spray fire extinguishing system. Background technique [0002] In recent years, with the rapid development of my country's social economy and the upgrading of power transmission and distribution technology, a number of large oil-immersed transformers have emerged. However, due to the high voltage level, large energy, large oil storage capacity, and high operating temperature of large oil-immersed transformers, the risk of explosion and fire is high, the damage is great, and it is difficult to fight. Once a fire occurs, it will cause major economic and property losses and seriously threaten stable operation of the grid. Therefore, effective fire protection measures should be taken for large oil-immersed transformers. [0003] The fixed fire extinguishing system is one of the most effective means to extinguish the initial fire in time and minimize the fi...

AI Technical Summary

Problems solved by technology

Because fire extinguishing systems such as water spray and foam spray rely on the end nozzle to form an effective spray for fire extinguishing, when the nozzle is blown up or blown up, it will not be able to form an effective spray, so it will directly fail

Moreover, the closer the nozzle is to the explosion point, the easier it is to be blown up, resulting in the inability to form an effective spray for fire extinguishing in the fire area around the explosion point that most needs to be extinguished.

[0005] (2) After some nozzles are damaged, a large amount of fire-fighting water or foam mixture will be wasted, which will seriously affect the spray effect of other remaining nozzles

Since the internal flow diameter of water mist nozzles and foam spray nozzles is much smaller than the inner diameter of the inlet, when some nozzles are damaged, the branch pipes connected to them will become discharge ports or pressure relief ports, causing a large amount of fire water or foam solution to flow out from there. The entire fixed fire extinguishing system loses pressure, and the remaining undamaged nozzles cannot reach the design pressure and form an effective spray, which leads to the failure of the entire fixed fire extinguishing system

[0006] (3) The high temperature of the fire will lead to the deformation of the fire branch pipe, which will cause the system to fail to completely envelop the protected object and seriously affect the fire extinguishing effect

[0007] It can be seen that the existing fixed fire extinguishing system of large oil-immersed transformers is easily affected by explosion and fire high temperature, which cannot meet its fire fighting needs, and there are great fire safety hazards. Effective fixed fire extinguishing measures are urgently needed

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