The fire sprinkler head is used in the fire sprinkler system. When a fire breaks out, the water is sprayed out through the sprinkler head splash plate to extinguish the fire. Nozzle etc.
The sprinkler is a sprinkler that starts automatically within a predetermined temperature range under the action of heat or is started by a control device according to a fire signal, and sprinkles water according to the designed sprinkling shape and flow rate.
Definition of fire sprinkler
When a fire breaks out, the fire-fighting water is evenly sprinkled through the sprinkler head to control the fire in a certain area. The common types of sprinkler heads are drooping type, vertical type, ordinary type, and side wall type.
Structure of fire sprinkler
It is mainly composed of sprinklers, liquid-filled heat-sensitive glass bulbs, water pipe plugs, and water pipes. Among them, kerosene, ether, and other solutions are stored in the heat-sensitive glass ball, and the operating temperatures of various colors are: red 68°C, yellow 79°C, green 93°C, and blue 141°C, and these types are generally used. And red is the most commonly used sprinkler head in our life.
The principle of fire sprinkler
Typically, fire sprinklers are mounted on walls or ceilings connected to pressurized water network pipes, or individual sprinklers are installed along the pipes to protect the area beneath them. When a fire breaks out, the glass ball in the sprinkler head will be exposed to high temperatures, and the liquid inside will start to expand. When the set expansion temperature is exceeded, the liquid will crush the glass ball. At this time, the water in the water pipe will flow out, to extinguish the fire. Sprinklers spray water continuously over the flames and in most cases completely douse the source of the fire, or at least control the heat and limit the production of toxic fumes until the fire brigade arrives.
Classification of fire sprinklers
Pendent type
The pendant sprinkler is the most widely used sprinkler. It is installed on the branch pipe of the water supply. The shape of the sprinkling is parabolic, and 80-100% of the total water is sprayed into the ground. To protect rooms with suspended ceilings, sprinkler heads should be arranged under the suspended ceiling, and drooping sprinklers or ceiling-mounted sprinklers should be used.
Upright type
The vertical nozzle is installed upright on the water supply branch pipe. The sprinkling shape is parabolic. It sprays 80-100% of the total water downwards, and at the same time, part of it is sprayed to the ceiling. It is suitable for installation in places where there are many moving objects and is prone to impact The warehouse can also be concealed on the roof of the room’s ceiling interlayer to protect the ceiling boron with more combustibles. (For places without suspended ceilings, when the water distribution branch pipes are arranged under the beams, they should be upright. For parts that are prone to collisions, sprinklers with protective covers or ceiling-mounted sprinklers should be used)
Normal type
Ordinary sprinkler heads can be installed directly or hung down on the sprinkler network to spray 40%-60% of the total water downwards, and the larger part is sprayed to the ceiling. Suitable for restaurants, shops, warehouses, underground garages, and other places. (ordinary type is less used)
Sidewall type
The side wall-type sprinkler is installed against the wall, which is suitable for installation in places where space distribution is difficult. It is mainly used to light dangerous parts of buildings such as offices, halls, lounges, corridors, and guest rooms. Sidewall sprinklers can be used for light hazard level and medium hazard level I classrooms and offices with horizontal roofs.
Concealed sprinkler
Concealed spraying is suitable for high-end hotels, residences, theaters, and other places that need to ensure the ceiling is flat and tidy.
The cover of the concealed spray is welded to the thread with fusible metal, the melting point is 57 degrees. Therefore, when a fire breaks out, the temperature rises to make the cover fall off first, and when the temperature rises to 68 degrees (general sprinkler head), the glass tube bursts, and the water jets out. Therefore, the most taboo of the concealed nozzle is that the cover is stained with paint and paint, which will cause the action to malfunction.