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High expansion foam fire-extinguishing system

A technology of foam fire extinguishing and foam fire extinguishing agent, which is applied in fire rescue and other fields to prevent the reduction of foaming rate and facilitate the formation of foam film

Inactive Publication Date: 2012-01-25
NOHMI BOSAI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, for this kind of outside air, in order to use the outside air, it is necessary to install ducts through the building, or to open holes in the next door to install ventilation. Bubbler, therefore, there are problems such as high cost

Method used

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  • High expansion foam fire-extinguishing system
  • High expansion foam fire-extinguishing system
  • High expansion foam fire-extinguishing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] First refer to the following figure 1 , figure 2 Embodiments of the first invention will be described.

[0056] A high-expansion foam fire extinguishing device is provided in a room (chamber) 1 as a foam discharge area. The fire extinguishing equipment is a foaming machine provided with a flow channel tube 2, and its foaming rate is set at 500 times, for example. In this flow path tube 2 is provided a foaming portion 3 (foaming portion 3 ) that sucks air in the discharge area 1 by driving the spray nozzle 9 to generate foam in the foam solution.

[0057] A net 7 for foaming (net 7 for generating foam) is opened in the foaming part 3 at the front end of the flow channel tube 2. In addition, a plurality of nets 7 facing the foaming at intervals are provided inside it. Spray nozzle 9. Such a foaming machine has a structure in which a foam solution and air are supplied in accordance with the foaming rate. The spray nozzle 9 is connected to a water supply source (not ...

no. 1 example

[0077] In the high-expansion foam fire extinguishing equipment of the above-mentioned embodiment, the mixing ratio of the above-mentioned Megaform F623T (registered trademark) is made larger than the above-mentioned standard mixing ratio. In order to adjust the mixing ratio, the fluorine-based surfactant is relatively It is an experiment in which the mixing ratio of the foaming water solution reaches the design foaming rate concentration and makes it foam. The experimental results are shown in Table 1. In this Table 1, the foam fire extinguishing agent (%) column represents the adjusted mixing ratio, the fluorosurfactant concentration (%) column represents the design foaming rate concentration, and the foaming rate column represents the actual foaming rate. bubble rate.

[0078] As can be seen from Table 1, for example, when the mixing ratio is adjusted to 4.0%, the design expansion ratio concentration is 0.4%, the expansion ratio is 240 times, and the desired expansion ratio ...

no. 2 example

[0088] In the second experimental example, for the foam fire extinguishing agent, instead of the aqueous film-forming foam fire extinguishing agent, a synthetic surfactant fire extinguishing agent is used, and the foaming experiment is carried out in the same way as above, and its experimental conditions are the same as those of the first experimental example above. same.

[0089] As the above-mentioned synthetic surfactant fire extinguishing agent, Snow-lap H (registered trademark) mainly composed of a hydrocarbon-based surfactant was used, and the standard mixing ratio of this fire extinguishing agent was 3%. The experimental results are shown in Table 2. In this Table 2, the foam fire extinguishing agent (%) column represents the adjusted mixing ratio, the hydrocarbon-based surfactant concentration (%) column represents the design foaming rate concentration, and the foaming rate column represents the actual foaming rate. bubble rate.

[0090] As can be seen from Table 2, f...

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Abstract

The present invention provides a high expansion foam fire-extinguishing system including: an emission nozzle to which a foam solution prepared by mixing water with a foam concentrate containing a surface active agent is sent under pressure; a flow passage; and a foam screen upon which the foam solution discharged from the emission nozzle impinges, in which the foam concentrate used is one of one in which a mixing ratio of the foam concentrate with respect to the foam solution is an adjusted mixing ratio higher than a standard mixing ratio and one in which a content rate of the surface active agent with respect to the foam concentrate is a design content rate that is higher than a standard content rate, and in which a mixing ratio of the surface active agent is a concentration for design foam expansion ratio.

Description

technical field [0001] The present invention relates to high-expansion foam fire extinguishing equipment used in various warehouses, storages, factories dealing with dangerous goods, or ship rooms, cabins, etc., and more particularly, to high-expansion foam fire-extinguishing equipment capable of preventing a decrease in foaming rate. Background technique [0002] In foam fire extinguishing equipment, a foam solution (hereinafter, sometimes simply referred to as "aqueous solution") is sprayed from a spray nozzle, and it collides with a foaming net and sucks in air to make it foam and completely cover it with the foam. Fire source, smother fire. Among such foam fire-extinguishing equipment, there are low-foaming fire-extinguishing equipment and high-foaming (high-expansion foam) fire-extinguishing equipment. [0003] In the above two kinds of fire extinguishing equipment, the foaming rate is different. For example, when the foaming rate (multiple) of the low foaming fire ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62C5/02A62C35/02
Inventor 村田真志横尾明彦浅见高志
Owner NOHMI BOSAI LTD
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