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High expansion foam fire-extinguishing system

A foam fire-extinguishing and high-expansion technology, used in fire rescue and other directions, can solve the problems of not being able to catch up, not being able to form side by side at the same time, poor foaming rate, etc., so as to reduce the reduction of foaming rate and prevent the reduction of foaming rate. , the compact effect of the foamer

Inactive Publication Date: 2009-09-09
NOHMI BOSAI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the present inventors believe that the reason for the poor foaming rate due to the presence of foreign matter such as smoke particles is that, when the spray nozzle is operated at the standard setting, the velocity of the droplets of the foam solution from the spray nozzle is too fast, so that The formation of the two films cannot catch up with the speed, so the two films cannot be formed side by side at the same time, resulting in the droplet passing through the mesh of the foaming net

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

no. 1 example

[0086] use Figure 1 ~ Figure 3 A first embodiment of the present invention will be described.

[0087]In a room (chamber) as a fire monitoring area, a foamer B of high-expansion foam fire extinguishing equipment is installed. The foaming rate of this foamer B is set to 500, for example.

[0088] The foamer B is cylindrical, for example, has a foamer body 1 with a square cross-section, its transverse length L is, for example, 900 mm, and its longitudinal length (height) H is, for example, 640 mm. The net 2 for foaming is provided in the front-end|tip 1a side of this foamer main body 1. As shown in FIG. On the side of the rear end 1b of the foamer main body 1, at a predetermined distance from the foaming net 2, for example, 90 cm, a spray nozzle 3 is installed inside. The spray nozzle 3 sprays the foam solution W in a conically expanding spray pattern WP toward the foaming net 2 .

[0089] The inside of the foamer main body 1 is divided by an intermediate net 4 . The inter...

no. 2 example

[0100] use Figure 4 The second embodiment of the present invention is described, with Figure 1 ~ Figure 3 The same reference numerals have the same names and functions. In addition, the structure of the foam generator (foam generator of this embodiment) of this embodiment is different from that of the first embodiment, and the system structure other than that is substantially the same.

[0101] The difference between this embodiment and the first embodiment is the arrangement position of the intermediate net 4 . That is, the arrangement position P1 is a limit position where the liquid droplets of the foam solution W sprayed from the spray nozzle 3 can maintain a flow velocity that can pass through the meshes of the intermediate net 4 .

[0102] As mentioned above, in this embodiment, the area from the arrival position P0 where the outer periphery of the spray pattern hits the inner wall of the foamer main body to the extreme position P1 where the liquid droplets can pass t...

no. 3 example

[0105] use Figure 5 , Figure 6 The third embodiment of the present invention is described, with Figure 1 ~ Figure 3 The same reference numerals have the same names and functions. In addition, the structure of the foam generator (foam generator of this embodiment) of this embodiment is different from that of the first embodiment, and the system structure other than that is substantially the same.

[0106] This embodiment differs from the first embodiment in that a plurality of spray nozzles 3 are provided. The number of the spray nozzles 3 is, for example, four, and these spray nozzles 3 are arranged side by side, and their front ends are located on the same vertical plane.

[0107] The present invention is not limited to the above-mentioned embodiments, and for example, the intermediate net 4 may be installed obliquely at a predetermined angle instead of vertically. The inclination angle can be appropriately selected within a range of, for example, 1 to 30 degrees.

[...

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Abstract

In order to prevent foaming ratio from being degraded, there is provided a high expansion foam fire-extinguishing system (B) including: a foam generator body (1) formed to a tubular shape; a foam forming screen (2) arranged at a distal end (1a) side of the foam generator body (1); an emission nozzle (3) arranged at a back end (1b) side of an interior of the foam generator body, for radiating a foam solution (W) in an emission pattern (WP) that spreads in a conical shape towards the foam forming screen (2); and an intermediate screen (4) arranged between the foam forming screen (2) and the emission nozzle (3), in which the intermediate screen (4) is arranged in a liquid droplet speed regulating region from a landing position (P0) at which an outer periphery of the emission pattern (WP) hits an inner wall (1f) of the foam generator body to a limit position (P1) at which liquid droplets can pass through a mesh of the intermediate screen (4).

Description

technical field [0001] The present invention relates to high-expansion foam fire extinguishing equipment used in warehouses, oil tank tanks, culverts of oil complexes, or ship rooms, ship warehouses and the like. Background technique [0002] In the foam fire extinguishing equipment, the foam solution is sprayed from the injection nozzle, and it collides with the foaming net to inhale air to generate foam, and the fire source is completely covered with the foam to suffocate the fire. Among them, the foaming rate refers to the volume ratio of the foam solution and the generated foam, and the foam fire extinguishing equipment with a foaming rate of more than 80 and less than 1000 is called high-expansion foam fire extinguishing equipment. [0003] In order to produce high-expansion foam, such as foam with a foaming rate of 500 or more, a large amount of air must be sucked in from the upstream side of the injection nozzle. ). [0004] However, in order to use such external ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C31/12
CPCA62C31/12A62C5/02A62C3/06A62C3/10A62C31/02
Inventor 村田真志
Owner NOHMI BOSAI LTD
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