Description of suspended ultra-fine dry powder fire extinguishing device layout spacing
Release time:
2018-11-24
Source:
From 2003, China's independent research and development of "suspended ultrafine dry powder rescue equipment" (formerly known as pulse ultrafine dry powder active rescue equipment) since the introduction of its rescue cases in the performance of the "rapid response, pre-pressure, high-efficiency rescue" features are gradually being broadly accepted by the user. Shanxi, Henan, Anhui and other provinces of the hanging dry powder rescue equipment "planning, equipment, inspection" local standards have been introduced, the scale of its use and the use of methods are also becoming more mature. 2006 the Ministry of Public Security promulgated the GA602-2006 "hanging dry powder rescue equipment" industry standards, a consistent naming approach, it is reported that the "suspension type ultrafine dry powder rescue equipment" is the first time in the industry. Suspended ultra-fine dry powder rescue equipment planning, equipment, inspection of the national standard will also come out, will further standardize the use of suspended ultra-fine dry powder rescue equipment.
Suspended ultrafine dry powder rescue equipment can be used in the distribution cabinet, cable trench, cable mezzanine, cable tunnels, communication stations and other unmanned and traditional methods can not be solved places. The author after a lot of experimental data proved in the cable tunnel, storage warehouse, cable mezzanine in some of the planning program, can not ensure that the effective concentration of ultra-fine dry powder to save the concentration and the intensity of the eruption, and then can not effectively reach the role of life-saving. The main reason for this is that some manufacturers of planning staff to get the test function data in the ambitious state, directly applied to the messy and useful places, such as: the same ultra-fine dry powder, different manufacturers issued by the salvage parameters vary greatly, there are 65 grams / cubic meter, there are 100 grams / cubic meter, there are also 148 grams / cubic meter [GA578-2005 "ultra-fine dry powder salvage agent" stipulates that the 150 grams to extinguish a cubic meter of fire model], because the fire model is formulated by the enterprise itself, so the shape of the fire model has a great influence on the dosage of ultrafine dry powder extinguishing agent. The author has done the test under the closed state with different fire models, and the results are as follows:
Fire extinguishers
It can be seen that the amount of life-saving agent obtained in a specific model state can not be used as the basis for universal application, formulaic planning parameters for the bad companies to save the magic of the test, expand the product life-saving function, deception of the user to provide the conditions.
In developed countries, the scientific planning approach is widely used, that is, according to the use of the place to set up a fire model, and then use it in detail after the test data. In order to better serve the society, COSCO Fire Service Equipment Co., Ltd. has set up entity fire models such as cable tunnels, storage warehouses, cable shafts, distribution cabinets, car engine compartments and so on. After a lot of storage pressure and non-storage pressure suspended ultrafine dry powder rescue equipment rescue test proved that the suspended ultrafine dry powder equipment to determine the role of the elements of the rescue, not only the concentration of the rescue agent, and with the delivery of the rescue agent air pressure has a great deal to do. Therefore, the new national standard introduces the concept of eruption strength (eruption density), which is to ensure that the ultrafine dry powder can reach the fire with certain concentration and speed in the maintenance scale to achieve the intention of saving lives.
In order to ensure the strength of the eruption must be determined between the interval between the rescue equipment. We chose different manufacturers of 〈suspended ultrafine dry powder equipment to save the equipment〉 to carry out the fire entity model test, verified in the large space place equipment 〈suspended ultrafine dry powder to save the equipment》 distance should be:
1. the warehouse and electromechanical equipment set up between the rescue equipment, should be placed in the top of the maintenance target according to the square and rectangle, square placement of the side should not be greater than 2.5m, rectangular placement of the side should not be greater than 3m, the height of the equipment should not be greater than 6m.
2. cable tunnel set life-saving equipment, should be placed along the cable tunnel in the top center position, the distance between the life-saving equipment should not be greater than 3m.
3. cable mezzanine set up life-saving equipment, should be placed along both sides of the cable tray at the top of the mezzanine, the distance between the life-saving equipment should not be greater than 2.5m.
It also shows that the planning approach of dividing the maintenance volume indicated by the life-saving equipment by the practical volume is not desirable.
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