Precautions for carbon dioxide fire extinguishers: Wear gloves when using, and avoid skin contact with spray tubes and spray hoses to prevent frostbite. When using a carbon dioxide fire extinguisher to put out an electrical fire, if the voltage exceeds 600 volts, cut off the power supply first, and then put out the fire. When using carbon dioxide fire extinguishers outdoors, you should choose to spray in the upwind direction. When used in a narrow indoor space, the operator should leave quickly after the fire is extinguished to prevent suffocation.
Fire extinguisher A fire extinguisher is a portable fire extinguishing tool. Chemicals were put in the fire extinguisher to put out the fire. Fire extinguisher is one of the common fire prevention facilities. They are stored in public places or places where fires may occur. Different types of fire extinguishers contain different components and are specially designed for different fires. Care must be taken to avoid counterproductive and dangerous use.
origin
The world's first fire extinguisher was born in London on 1834. A fire almost completely destroyed the old Westminster Palace, where the British Parliament Building is located. Among many firewatch, there is one person who has not been idle to see the fire scene. He is George William Manby. Born in Norfolk, Mamby joined the army when he was young, from officer to captain, and served as commander of Yarmouth Camp. This idle position enabled him to devote himself to the cause of saving human lives that strongly attracted him. Previously, he was keen on shipwreck rescue. He invented the life buoy in the shape of trousers, and was the first person to put forward the identification signal by flashing the lighthouse. Later, Manby turned his genius from ocean rescue to fire rescue. He was trying on a fire suit when the fire broke out. His most outstanding pioneering contribution is the invention of a portable compressed gas fire extinguisher, which is a copper cylinder with a length of two feet, a diameter of eight inches and a capacity of four gallons, which is basically the same as today's fire extinguishers. He put the fire extinguisher in his specially designed trolley. He hopes that the patrol equipped with this fire extinguisher can immediately put out small fires at the scene of the fire, thus reducing the number of major fires.
use
Fire-fighting equipment is a kind of fire-fighting necessity that is often ignored at ordinary times and shows its talents when it is urgently needed. Especially in today's high-rise buildings and indoor decoration, wood, plastic and fabric are widely used. Once a fire breaks out, there is no suitable fire extinguishing equipment, which may lead to great disaster.
In ancient times, fire fighting equipment was very simple, nothing more than hooks, axes, shovels, buckets and the like. The first real special fire extinguisher was invented by British captains Manby and Norfolk in 18 16. This is just one or two barrels filled with 1 water and compressed air.
By the middle of19th century, French doctor galil invented the portable chemical fire extinguisher. Mix sodium bicarbonate and water in a barrel, and put sulfuric acid in a glass bottle at the mouth of the barrel. When in use, the hammer breaks the bottle, so that the chemicals are mixed to produce carbon dioxide, which is discharged out of the barrel by water pressure.
1905, Professor Laurent of Russia invented a foam fire extinguishing agent in St. Petersburg. Aluminum sulfate is mixed with sodium bicarbonate solution, and stabilizer is added. Foam containing carbon dioxide produced after spraying floats on burning oil, paint or gasoline, which can effectively isolate oxygen and suffocate the flame.
1909, Davidson of new york obtained a patent. He used carbon dioxide to squeeze carbon tetrachloride out of a fire extinguisher, and this liquid immediately turned into a heavier nonflammable gas to extinguish the flame. Since then, small fire extinguishers such as dry powder fire extinguishers and liquid carbon dioxide fire extinguishers have appeared.
classify
There are many types of fire extinguishers, which can be divided into: portable and cart-type; According to the power source driving the extinguishing agent, it can be divided into: gas cylinder type, pressure storage type and chemical reaction type; According to the filling fire extinguishing agent, it can be divided into: foam, dry powder, haloalkane, carbon dioxide, clear water and so on.