Ultrafine dry powder extinguishing method for high-rack stereoscopic warehouse

Abstract

The invention provides an ultrafine dry powder extinguishing method for a high-rack stereoscopic warehouse. The area of the warehouse is divided into fire extinguishing subareas and rectangular fire extinguishing units; ultrafine dry powder extinguishing dust cloud generating devices are arranged; dedicated fire extinguishing agent spraying pipelines are mounted along a goods shelf column direction and are two fire extinguishing agent spraying main pipes parallelly laid against the lower surface of a bottom plate of an upper goods shelf, and a horizontal outer side of each main pipe is connected with a spraying branch pipe; and the spraying branch pipe is provided with downward sprinkling nozzles. During a fire hazard, an automatic detection system receives a fire hazard signal and then starts the fire extinguishing devices after identifying, determining and confirming the fire hazard signal so as to release a fire extinguishing agent, and related linkage equipment is started and stopped in linkage; gas-liquid two-phase flow of ultrafine dry powder and inert gas is sprayed to an on-fire position or a to-be-protected area through the dedicated fire extinguishing agent spraying pipelines, and a mixture of ultrafine dry powder and inert gas is uniformly sprayed to cover the surface of a to-be-protected substance; and thus, fire extinguishing is realized. According to the invention, multi-point formation of uniform sprinkling through linear long-distance multi-sprinkling nozzles is realized; the dust cloud of the fire extinguishing agent can penetrate a fire scene at a certain designed kinetic energy, and minimum usage amount of the fire extinguishing agent and an optimal fire extinguishing effect are realized.

Description

technical field [0001] The invention belongs to the technical field of fire fighting, and in particular relates to an ultrafine dry powder fire extinguishing method for an elevated three-dimensional warehouse. [0002] It is suitable for the application of elevated three-dimensional warehouse with high single-layer height and large volume; long continuous length, high height and dense arrangement of shelves; many types and large quantities of stored items; and high degree of operation automation. Background technique [0003] With the rapid development of our country's national economy, single-layer high and large volume; continuous length of shelves, high height and dense arrangement; storage items with many types and large quantities; elevated three-dimensional warehouses with high degree of operation automation appear in large numbers. Once a fire breaks out in this type of building, the fire spreads quickly and is difficult to fight. If there are no very effective fire ...

AI Technical Summary

Problems solved by technology

Fine water mist is easy to extinguish large fires, but difficult to extinguish small fires; it is easy to extinguish class B and C fires, but it is difficult to extinguish class A fires, especially smoldering fires; it cannot guarantee that the protection materials that hate water and are afraid of water will be free from water stains impact, there are also the disadvantages of a large number of pipe networks

[0010] If the ultra-fine dry powder fire extinguishing system uses a pipe network, the equipment is huge and the pipeline is too long to exceed the maximum distance that the ultra-fine dry powder can effectively transport, so it cannot be applied

However, this method of fire extinguishing has the following problems: when the distance between back-to-back shelves is less than 40cm (the distance of most warehouses is less than this value), the commonly used ultra-fine dry powder fire extinguishing system is generally used. The device cannot be placed, and the fire-extinguishing ability of the special-shaped device is affected. More importantly, the device cannot be suspended on the roadway side where the stacker and forklift travel, otherwise the operation of the equipment will be affected; and the device suspended to the other side, When there are goods on the shelf, it forms a shield, and it is difficult for the fire extinguishing agent to reach this side effectively, so the fire protection on this side becomes a blank blind area

[0011] In summary, there is a lack of targeted fire extinguishing methods suitable for elevated three-dimensional warehouses in the prior art

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