1. Let's draw a small circle first. This is the pressure gauge of the fire extinguisher. We can paint it white or light. Pull the handle of the fire extinguisher at the top of the pressure gauge. Colour the handle part black.
2, under the pressure gauge, draw a fire extinguisher tank, etc. The tank is cylindrical and painted red. Starting from the left side of the pressure gauge, pull the hose of the fire extinguisher. The hose part hangs down and is painted black.
At the end of the hose, we draw a yellow nozzle. The nozzle size is proportional to the hose. Finally, insert a yellow square on the tank of the fire extinguisher and input the font of the fire extinguisher on it. The stick figure of the fire extinguisher is finished.
Fire extinguisher:
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.
18 18, Captain Manby invented the world's first portable fire extinguisher, which is regarded as the originator of modern fire extinguishers.
1905, Russian professor Laurent invented the first chemical foam extinguisher, which can use carbon dioxide foam to put out flames. The fire extinguisher contains aluminum sulfate and sodium bicarbonate solution, but aluminum sulfate is placed in a small room of the cylinder. Before the fire extinguisher is used, it is sealed and can only be mixed when it is used to produce foam containing carbon dioxide.
19 10, Delaware pyrene manufacturing company applied for the patent of carbon tetrachloride fire extinguisher. The next year, he applied for a patent for a small portable fire extinguisher, which also used carbon tetrachloride to extinguish the fire.
The fire extinguisher is a container made of brass or chromium, equipped with an integrated hand pump, which is used to spray liquid into the fire, and to vaporize and extinguish the flame by inhibiting the chemical chain reaction in the combustion process. Later, carbon tetrachloride was phased out because of its health risks.