Nozzle arrangement and selection

Arrangement of sprinklers shall cover the surface of hazardous materials to be protected, the number should be based on a single nozzle sprinkler coverage, application height, pitch and protection of objects to determine mist layout should follow the principles of object overwrite protection, while meeting the fruit tree sprayer spray strength requirements.

1, should be based on protection zone height, area, type of fire, the protected object appearance and reasonable choice extinguishing system type nozzle.

2, total flooding system nozzle should be a rectangular, square or diamond-shaped arrangement of the protection zone at the top of a balanced, appropriate for high spatial hierarchical arrangement.

3, the local system should be balanced nozzles arranged around the object to be protected, for higher hierarchical arrangement of objects should be.

Ten, the amount of water required for fire-fighting

Water volume required fire determined as follows:

Single nozzle flow q = k

(Single nozzle flow nozzle Flow coefficient is equal to 10 times by the square root of the nozzle working pressure)

P-nozzle pressure Mpa

K-Nozzle Flow coefficient

System design flow Qj = 1/60

(System design flow rate equal to the system starts the same time open the flow and spray nozzle)

Qj-system design flow (L / s)

N-system starts at the same time the number of manual sprayer spray mist nozzle

Qi-spray nozzle of the actual flow rate (L / min), shall be the actual working pressure spray nozzle

Water system

W = QjXt (L)

W-system water (L)

T-mist injection time (min)

(Equal to the water system by system design flow and water mist injection time)

System storage capacity

Wc = W (L)

Preset storage capacity of water mist fire extinguishing system must be based on the manufacturer's technical criteria.