In our daily lives, firefighting equipment has become an essential facility in every location to prevent or handle fire incidents. When a crisis arises, the accurate and swift use of firefighting equipment can not only protect our own safety but also prevent a disaster. So, how much do we know about firefighting equipment? Let's take a look at several common types of fire extinguishers.
1. Fire alarm: Fire alarm is one of the important means to prevent fires. Its function is to detect large amounts of smoke that may cause a fire and issue an alarm. The sensitivity of smoke detection should be considered based on geographical location and application environment to achieve the desired effect for users.
2. Fire Hydrant: The formal name of a fire hydrant is "fire hydrant," which is a fixed firefighting equipment primarily used to control combustibles, isolate oxidizers, and eliminate ignition sources. Typically, a fire hydrant assembly consists of components such as a fire hose, nozzle, clips, bolts, and clamps within a fire hydrant box. Fire hydrants are mainly utilized by fire trucks to draw water from municipal or outdoor water supply networks for firefighting, or to connect directly with hoses and nozzles for extinguishing fires. Therefore, indoor and outdoor fire hydrant systems are also crucial firefighting facilities.
R1: must be translated as "foam"  3. Foam Fire Extinguisher: The extinguishing principle of a foam fire extinguisher is that it can spray a large amount of carbon dioxide and foam during the fire-fighting process, which adheres to the combustible material, isolating it from the air, thereby achieving the purpose of extinguishing the fire. Foam fire extinguishers are divided into portable foam fire extinguishers, wheeled foam fire extinguishers, and air foam fire extinguishers. Foam fire extinguishers should be stored in dry, cool, ventilated, and easily accessible locations, away from high temperatures or areas exposed to sunlight to prevent carbonic acid decomposition from rendering them ineffective; in winter, anti-freezing measures should be taken to prevent freezing; and regular cleaning of dust, clearing of nozzles, and maintenance of unobstructed operation should be performed.
4. Carbon Dioxide Fire Extinguisher: The carbon dioxide fire extinguisher is a firefighting device with over a century of history. It is inexpensive, easily accessible, and simple to manufacture. It primarily suppresses fires by suffocation and localized cooling. During firefighting, the carbon dioxide gas displaces air and envelops the burning material or distributes within a relatively enclosed space, thereby reducing the oxygen concentration around the combustible material or in the protected area, leading to suffocation and extinguishment. Additionally, when carbon dioxide is released from its storage container, it rapidly vaporizes from liquid to gas, absorbing heat from the surroundings and providing a cooling effect.
5. Dry powder fire extinguisher: A type of firefighting equipment, dry powder fire extinguishers can be categorized based on the type of dry powder extinguishing agent they contain: ordinary dry powder fire extinguishers and ultrafine powder fire extinguishers. These extinguishers are filled with dry powder agents such as ammonium phosphate, which are easy to flow and dry. Composed of inorganic salts and ground drying additives, they can effectively suppress initial fires.