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A kind of foam fire extinguishing system and fire extinguishing method

A foam fire extinguishing and foam liquid technology, applied in the field of fire extinguishing, can solve the problems of affecting the fire extinguishing efficiency of the compressed air foam fire extinguishing system, the low mixing efficiency of compressed air and foam mixture, and the long mixing time of foam liquid and water, so as to improve the fire extinguishing effect , improve combat capabilities, and suppress the effects of enhanced capabilities

Active Publication Date: 2021-06-04
九江中船消防设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the compressed air and the foam mixture are mixed in a mixer. The existing mixer has a simple structure, and the mixing time of the foam and water is long and the mixing is not uniform enough, and the mixing efficiency of the compressed air and the foam mixture is also low, which affects the Fire Extinguishing Efficiency of Compressed Air Foam Fire Extinguishing System

Method used

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  • A kind of foam fire extinguishing system and fire extinguishing method
  • A kind of foam fire extinguishing system and fire extinguishing method
  • A kind of foam fire extinguishing system and fire extinguishing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the foam fire extinguishing system of the present invention comprises a fire-fighting water source, a fire-fighting water delivery pipe 11, a foam liquid storage tank, a foam liquid delivery pipe 21, a nitrogen storage tank 36, a nitrogen delivery pipe 31, a mixer 4 and a mixed liquid delivery pipe 5. The fire water source can be a fire hydrant or a fire truck.

[0036] The input end of the fire-fighting water delivery pipe 11 is communicated with the fire-fighting water source, and the output end is communicated with the mixer 4; the fire-fighting water delivery pipe 11 is provided with a liquid flowmeter-12, a regulating valve-13, and a one-way valve-14 in sequence; the liquid flowmeter One 12 is used to detect the flow of water; the regulating valve one 13 is used to adjust the size of the water flow, and what is selected here is a proportional flow valve; one-way valve one 14 is used to prevent the fire water from flowing backward into the...

Embodiment 2

[0042] Such as figure 2As shown, the present embodiment improves the structure of the mixer 4 on the basis of the embodiment 1, as follows.

[0043] Mixer 4 is provided with fire-fighting water inlet 41, foam liquid inlet 42, nitrogen gas inlet 43 and foam liquid outlet 44; Connected, the fire water inlet 41 and the foam liquid inlet 42 are located at the top of the mixer 4, and the fire water inlet 41 and the foam liquid inlet 42 are arranged at an angle; the nitrogen gas inlet 43 communicates with the output end of the nitrogen delivery pipe 31, and the nitrogen gas inlet 43 is located below the fire-fighting water inlet 41 and the foam liquid inlet 42, and the nitrogen delivery pipe 31 is connected to the mixer 4 obliquely; Nitrogen gas flows upward while the foam liquid flows downwards, thereby making the fire-fighting water and foam liquid mix with nitrogen more evenly; The cross flow makes it able to generate vortex with good mixing effect.

[0044] The mixer 4 is pr...

Embodiment 3

[0049] Such as figure 2 As shown, the present embodiment improves the structure of the mixer 4 on the basis of the embodiment 2, as follows.

[0050] The mixer 4 is also provided with a disperser 48 located in the axial direction of the mixer 4 . The disperser 48 is provided with a conical structure, and the conical top of the conical structure faces the top of the mixer 4 . In this embodiment, the disperser 48 is provided with a conical top, such as figure 2 As shown, the conical apex faces vertically towards the top of the mixer 4 . The fire-fighting water inlet 41 and the foam liquid inlet 42 are symmetrically arranged on the top of the mixer 4 with the axial direction of the mixer 4 being symmetrical. The fire-fighting water delivery pipe 11 and the foam solution delivery pipe 21 form an included angle of a=30-75°; the diffuser 48 is located below the intersection of the fire-fighting water delivery pipe 11 and the extension line of the foam solution delivery pipe 21. ...

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Abstract

The invention discloses a foam fire extinguishing system, which relates to the technical field of fire extinguishing. The system comprises a fire-fighting water source, a fire-fighting water delivery pipe, a foam liquid storage tank, a foam liquid delivery pipe, a nitrogen storage tank, a nitrogen gas delivery pipe, a mixer, and a mixed liquid delivery pipe. Pipe, nitrogen generator, air filter, liquid flow meter 1, regulating valve 1, check valve 1 are arranged in turn on the fire water delivery pipe; liquid flowmeter 2, regulating valve 2, One-way valve two; the nitrogen delivery pipe is sequentially provided with a shut-off valve, a gas flow meter, a regulating valve three, and one-way valve three. The invention also discloses a fire extinguishing method using the system. The beneficial effect of the present invention is that nitrogen, water, and foam are mixed and foamed, which improves the effect of foam on fire extinguishing; at the same time, the structure of the mixer is improved, and the foaming effect of nitrogen, water, and foam is mixed, and the foaming effect is improved. Fire suppression effectiveness and efficiency.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing, in particular to a foam fire extinguishing system and a fire extinguishing method. Background technique [0002] At present, when large-scale oil and petrochemical fires occur, compressed air foam is generally used to extinguish the fire. Its principle is to mix and foam air, water and foam under specific and proportional conditions to produce specific foam for fire extinguishing. Compared with direct water extinguishing, foam can improve the original physical properties of pure water, and has the functions of reducing the surface tension of water and increasing the coverage area of ​​water. Therefore, using foam to extinguish fire can quickly and effectively prevent the combustion chain reaction and greatly improve the fire extinguishing efficiency. . However, the air in the compressed air foam will bring fresh oxygen to the combustion, which has an adverse effect on rapid fire exti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62C5/02
CPCA62C5/02
Inventor 瞿晓花宋韵邱波杨振王泽潭邹平志
Owner 九江中船消防设备有限公司
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