Specification for fire sprinkler arrangement:
1, except for the nozzle in the ceiling and the nozzle installed under the ceiling, the distance between the splash plate of the vertical drooping standard nozzle and the roof should not be less than 75mm and not more than150 mm.
2. When the nozzle is arranged on the plane below the beam bottom or other obstacles, the distance between the splash plate and the roof should not be greater than 300mm, and the vertical distance between the splash plate and the beam bottom and other obstacles should not be less than 25mm, and should not be greater than100 mm. When the nozzle is arranged between beams, it should comply with the provisions of Article 1 of this specification. In case of difficulty, the distance between the splash plate and the roof should not be greater than 550 mm.
3. When the nozzle is arranged between the beams and the distance between the nozzle splash plate and the roof reaches 550mm, the nozzle should be added under the beam.
4. The vertical distance between the nozzle and splash plate at the bottom of multi-ribbed beam slab and the bottom of multi-ribbed beam slab should not be less than 25mm, nor should it be greater than 100 mm. ..
5. Where the clearance height is less than 8m, and the spacing between beams is less than 4×4(m), 1 nozzle can be arranged between beams.
6, libraries, archives, shopping malls, warehouses above the channel appropriate sprinkler. The horizontal distance between the nozzle and the protected object should not be less than 0.3m；; The minimum vertical distance between the nozzle splash plate and the protected object should not be less than the specified value.
7. The built-in sprinkler on the shelf should be staggered with the sprinkler under the roof. The distance between the splash plate and the upper deck shall comply with the provisions of Article (3), and the vertical distance between the splash plate and the top surface of the goods below shall not be less than150 mm. ..
8. The shelf laminate above the nozzle in the shelf shall be closed laminate. If there are holes and gaps above the nozzle in the shelf, a heat collection baffle should be set above the nozzle. The heat collecting baffle should be a square or circular metal plate, and its plane area should not be less than 0.12m2, and the lower edge of its surrounding bent edge should be flush with the splash plate of the nozzle.
9, clearance height is greater than 800mm, and there are flammable substances in the technical interlayer, nozzle should be set.
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Types of fire sprinklers:
1, drooping type: the drooping sprinkler is the most widely used sprinkler, which is hung on the water supply branch pipe and sprinkles water in the shape of a throwing object, spraying 80 ~ 100% of the total water to the ground. Protect rooms with ceilings, and arrange sprinklers under the ceilings. Drip sprinklers or ceiling sprinklers should be used.
2. Vertical: the vertical nozzle is vertically installed on the water supply branch pipe, and the spraying shape is a throwing object, which sprays 80 ~ 100% of the total water downward. At the same time, a part of the vertical nozzle is sprayed to the ceiling, which is suitable for being installed in places where there are many moving objects and are vulnerable to impact, such as warehouses, and can also be hidden on the roof of the mezzanine floor of the room to protect boron at the top of the ceiling with more combustible substances. (Where there is no suspended ceiling, when the water distribution branch pipe is arranged under the beam, it should be vertical. Wear parts, should use the nozzle with a protective cover or ceiling nozzle)
3. Ordinary type: Ordinary type sprinklers can be directly or vertically installed on the sprinkler pipe network, spraying 40%-60% of the total water downwards and spraying a larger part to the ceiling. Suitable for restaurants, shops, warehouses, underground garages and other places. (The ordinary type is used less)
4. Side wall type: The side wall type sprinkler is installed against the wall, which is suitable for installation in places with difficult spatial distribution, and is mainly used in light dangerous parts of buildings such as offices, foyers, lounges, corridors and guest rooms. Side-wall sprinkler can be used in class I rooms with light or moderate danger and offices with horizontal roofs.
(Reference:
Baidu Encyclopedia: Spitfire Head)