How to use firefighting equipment if an electric vehicle catches fire in a residential community? What are the steps to use it?

According to the "Fire Protection Design Code for Garages, Repair Garages, and Parking Lots", garages with more than 5 vehicles should be equipped with a fire water supply system, and garages with more than 10 vehicles should be equipped with automatic sprinkler systems. Steps for using fire-fighting equipment

1. Steps for using fire extinguishers

According to the mode of movement, it can be divided into: portable type and cart type; according to the power source for driving the fire extinguishing agent, it can be divided into: Gas storage bottle type, pressure storage type, chemical reaction type; according to the filled fire extinguishing agent, it can be divided into: foam, dry powder, haloalkane, carbon dioxide, acid-base, clean water, etc. The spray time of the agent contained in the portable fire extinguisher is within one minute, and the actual fire extinguishing time is only 10 to 20 seconds.

Fire extinguishers have different fire extinguisher tools for extinguishing fires according to different types of fires. For example, dry powder fire extinguishers are suitable for initial fires of flammable and combustible liquids, gases and live equipment. They can also extinguish solid substances. First fire. When in use, carry the handle of the portable fire extinguisher, rush to the fire scene quickly, and put down the fire extinguisher about 5M away from the fire point. Pay attention to the upwind direction when using it outdoors. Before use, turn the fire extinguisher upside down several times to loosen the dry powder in the barrel, then pull out the safety pin, hold the nozzle with one hand, lift the handle with the other hand, press the opening handle, and the dry powder will spray out on its own .

2. Steps for using fire hydrants

Fire hydrants are usually installed in a fire hose box with a glass door. The box consists of a water gun, a hose, a fire hydrant and an alarm button. After a fire occurs, first use the fire hydrant box key or a hard object to break the glass on the door, open the door, then quickly remove the water hose on the hanger and the water gun on the spring rack, and connect the water hose interface to the fire hydrant interface. , if there is an alarm button, press the emergency alarm button. At this time, the red indicator light on the fire hydrant box will light up, sending a fire signal to the control room. Turn the fire hydrant handwheel counterclockwise to release water to extinguish the fire. 3. How to use wet automatic sprinkler fire extinguishing system:

When a fire occurs in the protected area, the temperature rise will cause the glass ball of the closed sprinkler head to explode and the sprinkler head will open to spray water. At this time, the pressure on the system side of the wet alarm valve decreases, and the water supply pressure is greater than the system side pressure (generating a pressure difference), causing the valve disc to open (the wet alarm valve opens), and one of the pressure water flows to the sprinkler head to sprinkle water on the protected area to extinguish the fire. At the same time, The water flow indicator reports the fire area; another channel of pressure water flows through the delayer to the hydraulic alarm bell, which emits a continuous bell alarm. The pressure switch of the alarm valve group or the pressure stabilizing pump outputs a signal to start the water supply pump, completing the system start-up. After the system is started, the water supply pump supplies water to the open nozzles, and the open nozzles spray water evenly at a spray intensity not less than that specified in the design to extinguish the fire. 4. How to use the automatic deluge sprinkler system:

When a fire breaks out in the protected area, the temperature and smoke detector detects the fire signal and directly opens the diaphragm deluge valve through the fire alarm and fire extinguishing controller. The solenoid valve allows the water in the pressure chamber to be quickly discharged. Due to the pressure relief in the pressure chamber, the water acting on the lower part of the valve disc quickly pushes up the valve disc, and the water flow immediately enters the working chamber and flows to the entire pipe network to spray water to extinguish the fire (if the personnel on duty detect a fire alarm, they can also manually open the manual quick-opening valve to achieve rainwater (the action of the shower valve); at the same time, part of the pressure water flows to the alarm pipe network, causing the hydraulic alarm bell to sound an alarm, the pressure switch to operate, sending a signal to the duty room or directly starting the fire water pump to supply water. 5. How to use the pre-action sprinkler system:

When a fire alarm occurs in the protected area, the detection system takes the first action and opens the pre-action deluge valve and the solenoid valve for exhaust in the system (outlet connection Exhaust valve), at this time the system begins to fill with water and exhaust, thus transforming into a wet system. If the water potential continues to develop, the closed sprinkler head will open to spray water to extinguish the fire. This overcomes the defect of the deluge system causing mis-spray due to malfunction of the detection system. If the glass ball of any nozzle in the system is accidentally broken, gas will be ejected from the nozzle, causing the air pressure in the system to drop rapidly, reducing the monitoring switch action, and sending out an alarm signal to remind the personnel on duty of an abnormal situation. However, the pre-action deluge valve There is no action, so the system will not spray water, thereby overcoming the shortcomings of wet systems that may cause water stains due to mis-spraying due to misoperation of the sprinkler head.