Fire extinguishing system is mainly composed of fire extinguisher, pump (ie a water supply equipment) and pumping station, valves and pipes, power source, etc. These special system components must pass the inspection of the national fire product quality supervision and inspection agency to pass the test and prove that they meet the national product quality standards before they can be used.
(1) Fire cannon Fire cannon is the main equipment of fire extinguishing system, and also the main difference between this system and other fire protection facilities. Fire cannons are mainly composed of imported attachments, gun bodies, and spray components. Among them, the connection accessory provides a connection interface, the gun body adjusts the spray direction through the movement of the horizontal slewing joint and the pitching slewing joint, and the injection member is used to realize different jets.
(2) Fire pumps and pump stations The design of fire pumps and pump stations is exactly the same as that of other fire pumps, and it should be noted that a centrifugal pump with a smooth characteristic curve is selected. Even in the case of small or zero flow, the water supply of high-rise buildings The pressure of the piping system will not change too much to damage the pipelines and accessories; the backup pump set should not be less than the working pump set with the largest working capacity.
(3) Power source Power source mainly includes three forms of electric, hydraulic and pneumatic power sources. In order to ensure the reliable operation and economical rationality of the system, the power source should have good corrosion resistance, rain resistance and sealing performance; effective fire prevention measures should be adopted for the power source and pipeline; the distance between hydraulic and pneumatic power sources and the fire monitors they control should not be greater 30 m; the power source should meet the requirements of remote control gun system operation control and linkage control within a specified time.
(4) Valves and pipelines When the diameter of the fire pump outlet pipe is greater than 300 mm, a valve with a single manual opening and closing function should not be used. The valve should have obvious opening and closing signs, the remote control valve should have fast opening and closing functions, and the seal should be reliable. Normally open or normally closed valves shall be provided with locking devices, and control valves and valves that need to be opened and closed shall be provided with opening and closing indicators. The opening and closing signals of the control valves participating in the remote control gun system linkage control should be transmitted to the system control room. The ball valve on the dry powder pipeline shall be a ball valve, and its diameter must be the same as the inside diameter of the pipeline.
