Fire-fighting equipment is a device that is rarely used in our lives, but is quite necessary. From small portable fire extinguishers to large trolley fire extinguishers, different sizes of fire-fighting equipment fight against different substances and fire according to their characteristics! The following decoration home decoration network Xiaobian will introduce you!
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1, dry powder fire extinguisher
(1) Use a dry powder fire extinguisher that is compatible with the ignition material;
(2) It is best to invert the fire extinguisher upside down several times before spraying to make the dry powder in the cylinder loose, but the injection cannot be inverted;
(3) Be sure to remove the safety device before pressing the pressure handle or pulling the lifting ring;
(4) When using a fire extinguisher with a spray hose (more than 4 kg), be sure to hold the nozzle or gun of the nozzle with one hand before spraying, and then open the release valve with the other hand;
(5) When standing in the fire, stand on the wind and start at 1-2 meters from the fire;
(6) When extinguishing liquid fire (B type fire), it can not be directly sprayed to the liquid surface. It should be moved from near to far, and swiftly oscillate about 10 cm on the liquid surface to cover the burning surface and cut the flame.
(7) When extinguishing Class A fire, first press the flame from top to bottom, and spray the fire extinguishing agent on the top, bottom, left and right of the burning material to prevent re-ignition;
(8) Dry powder fire extinguisher should not be placed close to heat source or sun when storing, pay attention to moisture, and check whether the driving gas is qualified regularly;
(9) Do not save a live object with a voltage exceeding 5000 volts.
2, carbon dioxide fire extinguisher
(1) The fire extinguishing effect of open-air fire extinguishers is not good when there is wind;
(2) Before the injection, first remove the safety device and then press the pressure handle;
(3) Because the effective injection distance of the carbon dioxide fire extinguisher is small, it should not be too far away from the fire source during fire extinguishing, generally about 2 meters;
(4) Do not touch the metal part when spraying to prevent frostbite;
(5) After spraying in a small confined space or underground tunnel, the person should immediately withdraw to prevent suffocation;
(6) It is strictly forbidden to keep close to the heat source or the sun when storing the fire extinguisher. Regularly check and check whether the carbon dioxide gas leaks by the weight of the well-known person.
3, 1211 fire extinguisher (halogenated alkane fire extinguisher)
(1) The fire extinguishing method and function of the 1211 fire extinguisher are basically the same as those of the carbon dioxide fire extinguisher, and the operation method is also the same;
(2) The fire extinguisher cannot be inverted when the fire is fired;
(3) Persons should be evacuated immediately after spraying fire extinguishing agent in a confined space, and ventilated after fire extinguishing;
(4) Do not store the fire extinguisher near the heat source and the sun. Regularly check the fire extinguishing agent for leaks or check the pressure gauge to determine if the needle is in the valid range.
Water-type fire extinguishers and foam fire extinguishers have the same construction principle. Water-based fire extinguishing agents are filled with water (clear water) or water mixed with various additives to enhance the effectiveness of fire fighting. The foam fire extinguisher has both chemical and mechanical fire extinguishers. The chemical foam fire extinguisher is a chemical reaction type fire extinguisher. It consists of an aqueous solution of sodium bicarbonate and a small amount of foam additive (foreign medicine) installed in the barrel of the fire extinguisher, and the inner tank. It consists of an aqueous solution of aluminum sulfate (internal medicine). A mechanical foam fire extinguisher is a gas cylinder in which a mixture of a mechanical foam liquid and water is placed in a fire extinguisher cylinder, and then filled with a certain pressure of nitrogen (storage type) or a certain amount of carbon dioxide.
(1) The chemical foam fire extinguisher inverts the fire extinguisher when it is extinguished, and the internal medicine and the foreign medicine are mixed and chemically reacted to generate foam and carbon dioxide gas, and the foam is ejected by the pressure of the carbon dioxide gas generated inside, and the surface of the combustion object is covered, thereby reducing The temperature of the combustion products, which in turn isolates the air, to achieve a fire-extinguishing effect (physical fire suppression).
(2) When the mechanical foam extinguishes the fire, the release valve is opened, and the foam mixed liquid is sprayed under the pressure of the cylinder. At the outlet of the nozzle, there is a mixed liquid to mix with the air to generate a large amount of foam covering the combustion product, thereby achieving the fire extinguishing. effect;
(3) The water-type fire extinguishing agent mainly sprays water onto the burning material to cool it to achieve the fire extinguishing effect;
(4) Water-type fire extinguishers and foam fire extinguishers cannot save fires from charged objects;
(5) The temperature range of the fire extinguisher is generally 4-55 °C, and the winter is expected to prevent freezing;
(6) Only chemical foam fire extinguishers need to be inverted when extinguishing fires, and other water-type and foam-type fire extinguishers shall not be inverted;
(7) The fire extinguishing agent of various foam fire extinguishers has different service life. Pay attention to the regular replacement of fire extinguishing agent according to the instructions of the fire extinguisher.
Steps for use: 1. First determine the direction of the fire, and lift the fire extinguisher to the upper air outlet of the fire source. 2. Unplug the safety bolt . 3. Hold the rubber nozzle. 4. Align the flame root 3-5 meters away from the fire source. If you are in a confined space, evacuate the site immediately and turn on all ventilation.
About the fire-fighting equipment related knowledge, decoration home decoration network Xiaobian will introduce you here, I hope you can understand! For more related knowledge, please pay attention to the life encyclopedia!
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