The fire-fighting appliances is usually tend to be left out, and it plays an active role in the time of need. Especially in the high-rise, interior with plenty of wood, plastic, fabric upholstery office or indoor rooms, once there is fire, and if you have no proper fire-fighting equipment, it may lead to disaster. Fire extinguishers in ancient times are very simple. Fire-fighting equipment is nothing more than a hook, ax, shovel and bucket class. The first truly dedicated fire extinguisher is invented by the British captain, Norfolk Man in 1816. It is only a drum made of two liters of water and filled with compressed air. To the mid-19th century, the French doctor Jiali Ai invented a portable chemical fire extinguisher. Sodium bicarbonate and water mixed in a barrel, and another mounted on the barrel mouth with a glass bottle container of sulfuric acid. When using, the striker break the bottle, so that the chemicals are mixed, then produce carbon dioxide, and press the water outside the barrel.
Fire Extinguishers in the 20th Century
Laurent Professor of Russian in St. Petersburg invented a foam fire extinguisher in 1905, mixed the aluminum sulfate and sodium bicarbonate solution and stabilizer, after the emission it generated the carbon dioxide-containing foam, floating in the combustion paint oil or gasoline, so that it can effectively cut off oxygen, smothering put out the flame. In 1909, Davidson in New York obtained a patent. That is the use of carbon dioxide from the pressure of the carbon tetrachloride fire extinguisher within this liquid will immediately become a non-combustible heavier gas to smother the flames. Since then fire extinguisher manufacturer has researched and developed some small fire extinguishers, such as the powder fire extinguisher, liquid carbon dioxide fire extinguisher.
Fire Sprinkler Heads
In the event of a fire, apart from the fire extinguisher, the fire sprinkler heads are the most important fire-fighting equipments. Generally, fire sprinkler heads can be divided into several categories as follows: A. Pendent sprinklers. Pendent sprinkler is the most widely used nozzle, the sagging IS installed in the water supply branch pipe, the water shape is a paraboloid-type, and 80 to 100% of the total amount of water is sprayed to the ground.
B. Upright sprinklers. Upright sprinklers are installed upright in the water supply branch pipe, the NW shape is paraboloid-type, and 80 to 100% of the total amount of water downwardly sprayed
C. Ordinary sprinklers. The ordinary type sprinklers can be mounted directly, and can be mounted on the sprinkler pipe line sag, 40% -60% of the total amount of water sprayed down.
D. Sidewall sprinklers. The sidewall sprinkler is wall-installed.
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