Shanghai Songyu Electromechanical Technology Co., Ltd. offers an advanced large-space intelligent active sprinkler system that combines cutting-edge technologies such as automatic fire image detection, spatial positioning, smoke detection, and automated fire suppression. This innovative system is designed to address the global challenge of large-scale fire detection and response by enabling early prevention and rapid intervention. The system is known for its long-range control, extensive coverage area, quick reaction time, and high level of reliability. System Operation Principle When a fire is detected by the image flame detector or other sensors, the central processing unit immediately identifies the affected area and controls at least two fire monitors located in that zone. These monitors quickly aim at the exact location of the fire, accurately pinpointing the source. The system then directs the fire cannons to the specific point and automatically activates the fire pumps and electric valves to spray water or foam for effective fire suppression. Once the fire is under control, the system automatically shuts off the pump and closes the valve, stopping the water flow and preventing unnecessary damage. The system operates in three distinct modes: manual, semi-automatic, and fully automatic. In manual mode, operators have full control over all actions. In semi-automatic mode, the detectors trigger alarms, and the fire cannons are automatically aimed at the fire source, but the actual spraying is initiated manually. In fully automatic mode, the system performs all tasks independently—starting from alarm detection, aiming, activating the pump and valves, to spraying water or foam, and finally shutting down the system without any human involvement. This intelligent fire suppression system is built to operate reliably in a wide range of environments. It is highly resistant to interference and can function effectively in challenging conditions such as indoor and outdoor spaces, wet or dry areas, extreme temperatures, heavy rain, strong winds, and more. Applications The system is ideal for use in various large spaces, including stadiums, airports, train stations, ports, warehouses, conference halls, shopping malls, and theaters. It is also suitable for special environments like historical buildings, highway tunnels, oil depots, large tank farms, aircraft hangars, and more. Additionally, it is well-suited for industrial settings with high levels of dust, moisture, or vapor, such as in tobacco and chemical plants. The system can also be deployed in harsh environments where corrosive gases or extreme weather conditions may be present.
Elevator doors have two major types, manual and automatic. Manual doors are normally opened and closed manually by hand, and automatic doors are the standard type of doors found in modern days elevators, usually powered by a door operator.
Non-automatic/manual doors
Automatic doors
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These doors are normally opened or closed manually using hands, although some of them close automatically. Most older and small European elevators from the 1950's to 1970's are using manual hinged door (similar to normal room doors), while the inside has a manual sliding scissor gate or often there is no door at all. For manual doors, sometimes the door can be spring loaded so the gate can't be left open, or the gate can automatically close when you press the button, and partly/completely close when the elevator gets to a floor. The inside door can also be a tubular gate, which is a gate that in many cases folds around the side of the cab when it is open (often called a barred gate by elevator enthusiasts, though this is likely not the actual term), and which can be automatic or manual.
These type of door is still used today, normally for smaller wheelchair lifts or home elevators. Some older freight elevators may have a horizontal or vertical manual doors. In some Asian countries, one may find an old freight elevators with manual accordion or scissor gate. Some old elevators may have a semi-manual doors a configuration of manual door outside and an automatic door inside.
Automatic doors are the standard type of doors found in modern days elevators which was introduced in 1887. Almost all the automatic doors are usually powered by a door operator installed on the elevator car. Those except manual door with automatic door opening/closing device and all the incline elevators with every independent door operator belongs with every single shaft doors and car doors.
