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Portable foam extinguisher capable of automatically foaming

A foam fire extinguishing agent and fire extinguisher technology, which is applied in fire rescue and other directions, can solve the problem of not mentioning the specific structure of the fire extinguishing foam device, and achieve the effects of improving utilization efficiency and fire extinguishing performance.

Active Publication Date: 2014-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is a fixed automatic foam fire extinguishing equipment for large storage tanks, which belongs to fixed fire extinguishing equipment. In this application, only the foaming gas and driving gas that can be dissolved in the aqueous solution of the foam-forming compound are mentioned; the foaming gas and The driving gas is preferably carbon dioxide; the specific structure of the spray fire extinguishing foam device is not mentioned in the entire claims

Method used

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  • Portable foam extinguisher capable of automatically foaming

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0051] In the fire extinguisher cylinder with a volume of 8L, fill 6L of foam fire extinguishing agent in which 143g of carbon dioxide has been dissolved, and pressurize it to 1.2MPa~1.4MPa with air or nitrogen.

[0052] The diameter of the flow control orifice is 4.0 mm, which is placed at the outlet of the valve head; 50 mm of glass beads with a diameter of 4 mm are added to the rear of the foam gun, and the inner diameter of the foam outlet is 14 mm. The foam injection time is 71s, the expansion ratio is 7.5, the foam is concentrated between 4.5m and 8.0m, the farthest spray distance is 8.7m, and there is no foam within 4.2m.

[0053] According to the requirements of item 7.3 of GB14351.1-2005 "Portable Fire Extinguishers Part 1: Performance and Structure Requirements", the fire extinguishing experiment of Class B fire was carried out. There is re-ignition, and there is still gasoline left in the pan.

specific Embodiment 2

[0054] Fill the fire extinguisher cylinder with a volume of 12L into 9L of foam fire extinguishing agent, fill in carbon dioxide while shaking, and dissolve 189g of carbon dioxide in total, pressurize to 1.2MPa~1.4MPa with air or nitrogen.

[0055] The flow control orifice has a diameter of 4.5 mm and is placed at the bottom of the straw; 50 mm of glass beads with a diameter of 4 mm are added to the rear of the foam gun, and the inner diameter of the foam outlet is 15.5 mm. The foam injection time is 88s, the expansion ratio is 8.0, the foam is concentrated between 3.5m and 5.5m, the farthest spray distance is 8.0m, and there is no foam within 2.8m.

[0056] According to the requirements of item 7.3 of GB14351.1-2005 "Portable Fire Extinguishers Part 1: Performance and Structure Requirements", the fire extinguishing experiment of Class B fire was carried out. There is re-ignition, and there is still gasoline left in the pan.

specific Embodiment 3

[0057] In the fire extinguisher cylinder with a volume of 12L, fill 9L of foam fire extinguishing agent in which 199g of carbon dioxide has been dissolved, and pressurize it to 1.2MPa~1.4MPa with air or nitrogen.

[0058] The diameter of the flow control orifice is 5.1 mm, which is placed at the outlet of the valve head; 65 mm of plastic beads with a diameter of 5 mm are added to the front of the foam gun, and the inner diameter of the foam outlet is 17 mm. The foam injection time is 59s, the expansion ratio is 8.0, the foam is concentrated between 4.0m and 7.0m, the farthest spray distance is 7.5m, and there is no foam within 2m to 2.5m.

[0059] According to the requirements of item 7.3 of GB14351.1-2005 "Portable Fire Extinguishers Part 1: Performance and Structure Requirements", the fire extinguishing experiment of Class B fire was carried out. There is re-ignition, and there is still gasoline left in the pan.

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Abstract

The invention provides a portable foam extinguisher capable of automatically foaming. The portable foam extinguisher comprises a barrel body, an extinguisher valve head, a foam gun, a flow control pore plate, a suction pipe, a tube and fire extinguishing agent; the fire extinguishing agent filled into the barrel body is pre-mixed foam fire extinguishing agent in which a certain quantity of carbon dioxide is pre-dissolved; the rear part in the foam gun is filled with a barrier material, so that the fire extinguishing agent can be sufficiently foamed; and at least one part of a foam liquid outlet of the extinguisher valve head or the tail part of the suction pipe is provided with the pore plate capable of controlling the flow of the foam liquid. The foam extinguisher can release the carbon dioxide dissolved in the fire extinguishing agent rather than sucking air, so that the foam can be generated, the foam performance can not be influenced by the jetting process hardly, and the foaming performance can not be changed basically in case of less push pressure at the later period of jetting, therefore, the use efficiency of the foam liquid can be greatly improved, and the fire extinguishment performance can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of fire protection, in particular to a self-foaming portable foam fire extinguisher. Background technique [0002] At present, portable foam fire extinguishers all adopt the air-breathing foam generation method. The air-breathing foam generator uses the Venturi effect for foaming, that is: the foam liquid flows at a high speed under the push of the compressed gas, and a negative pressure is formed in front of the nozzle of the Venturi tube, and the surrounding air is sucked into the foam generator cavity. Vigorous mixing of gas and liquid produces foam. The lower the pressure, the lower the liquid flow rate, the less air is sucked in, and the smaller the foaming ratio. The foam produced by this method has unstable foam performance and uneven foam. From our actual measurement, it is found that the foam performance of the air-breathing foam fire extinguisher is better only at the initial stage of spraying. ...

Claims

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Application Information

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IPC IPC(8): A62C13/00A62C13/76A62C5/02
Inventor 吴京峰谈龙妹牟善军邹兵郎需庆尚祖政孙键
Owner CHINA PETROLEUM & CHEM CORP
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