Sprinkler Sprinkler System In The Selection And Application - Water Spray Nozzle, Automatic Fire,
As a sprinkler system extinguished the fire early fire equipment
, has been quite widely used, its resistance to fire for improving the capacity building has an excellent effect. But to give full play to role of the sprinkler system must be constructed according to the characteristics of the building itself and the parts of the sprinkler head to a reasonable choice, which would significantly reduce the effectiveness of fire suppression systems. Here we have the choice of the sprinkler head to make a presentation for your reference.One nozzle classification Under different domestic and foreign literature. Sprinklers can be roughly divided into 6 categories. Design should fire risk, to protect the building structure space, sprinkler system's own characteristics to select nozzles. Specific type as follows:
1) whether the block under the nozzle, the nozzle can be divided into open and closed-type sprinkler heads. Sprinkler remove all media components and heat sealing element is open nozzle. Only water curtain nozzle is a special case of open nozzles;
2) according to the installation of sprinklers can be divided into vertical, and side wall hanging type. Both vertical installation of sprinklers can sag as ordinary type nozzle;
3) under the nozzle of the sprinkler water droplet size can be divided into traditional and sprinkler-type nozzle. Sprinkler-type nozzle diameter for larger splash plate, with a larger water distribution area: small in comparison to traditional wet-type ceiling sprinkler, sprinkler spacing can be properly increased. Another type sprinkler nozzle striking feature is the drop diameter, and droplet size as the weight value of 0.8mm, a frequency of 1.05; the conventional nozzle, re-value particle size of 0.35mm, a frequency of 0.58;
4) in accordance with the water distribution curve, that is the largest protected area of nozzle, can be divided into standard and extended coverage sprinkler heads. Risk level for the I l level, the standard sprinkler protection area of 12.5m maximum 2 And extended coverage heads up the largest protected area of 37.1m 2 ;
5) in accordance with the nozzle component reaction heat medium speed, rapid response can be divided into the nozzle to nozzle, a special nozzle and standard nozzle. First, the rapid reaction nozzle used in the 20th century home of 70 years. 80 years into the 20th century they used to warehouse. Then developed early suppression fast response sprinklers ESFR. Quick response sprinkler RTI is less than 50 (m? S) 1,2, a special nozzle of RTI for the 50-80 (m? 8) l, 2, the standard nozzle of RTI for the 80-350 (m? 8) 1 / 2 ;
6) under the sprinkler water flow coefficient or water bore is divided into small-diameter nozzle, standard nozzle (K = 80,12.5 mm) and large-diameter nozzle, flow coefficient K as high as 360.
Can be seen from the above categories. Our specification of the flow coefficient K = 80 of the sprinkler head as a standard nozzle has some limitations. Standard sprinklers should be described from three aspects: First, the nozzle flow coefficient K = 80: 2 is the nozzle of the thermal index Rrll, was 80-350 (m? S) l, 2: Third sprinkler water distribution curve of the nozzle the largest protected area.
2, nozzle selection and application Nozzle selection and application should be based on protection of sites of fire risk, protection of space, building construction, sprinkler system's own characteristics. And the nozzle discharge coefficient, thermal index of RTI and the largest protected area to determine. In practical engineering design, should consider the following questions:
1) No ceiling in place, should be vertical-type nozzle. Only in this way. To make early contact and hot air nozzle thermal heating element. Place in a ceiling. Sprinklers should be used or ceiling hanging type nozzle type sprinklers. Otherwise. Ceiling to stop the sprinkler distribution; light risk rating, risk level in residential (residential and hotel) and the office wall type nozzles can be used;
Product recommendation: Vertical large diameter sprinkler nozzles
Suppliers: Sichuan Machinery Factory Fire Details: ZST20 glass ball sprinkler nozzle is automatic sprinkler system is an important component parts, can be used for water supply pressure is not high, but requires sprinkler protection area of a large area of fire protection. Widely used to protect restaurants, hotels, shops, commercial buildings, warehouses, factories and other light, and the serious risk of dangerous grade-level buildings.
ZST20 glass ball JOB sprinkler head provided by the German assembly line production testing by the state fixed
Fire extinguishing system and fire-resistant components of Quality Supervision, Inspection Center, Ministry of Public Security to obtain quality certification.
Sprinkler frame with copper alloy, looking structure; heat sensitive components JOB glass ball with German products, strength and reliability, fast response.
Glass ball diameter 3MM and 5MM two
2), the light risk class, and the protection of life and places should adopt the quick response sprinklers. Like. Public entertainment, residential, atrium react building, hospital, nursing home wards and treatment areas, the elderly, children, the disabled and other places of collective activities. Seriously dangerous places acceleration in the event of fire, fast, quick release large amount of heat. As the quick response sprinklers are more sensitive to heat, it may result in a large area of nozzle opening. Open the nozzle so that more than the design level. Lead to lack of water density. Water density is less than that required for the actual water density. The fire can not be achieved. In addition, the set is not appropriate to capture the heat of the Department heads. Rapid response can be used with shelves built-in spray nozzle and so on.
Product recommendation: Large-caliber rapid-response sprinkler Suppliers: Beijing in the quality of consumer Valve Equipment Co., Ltd. Sichuan
Performance parameters: Model: ZSTX-20A Installation Type: hanging type
Connecting thread: R3 / 4 Rated pressure: 1.2MPa Nominal diameter: 20mm Factory test pressure: 3.0MPa Flow characteristic factor: 160 9 Glass ball diameter: 3 Time response index: 36 (m.s) 0.5
3) warehouses and other dangerous places can use specially certified quick response sprinklers. Such as Early Suppression Fast Response (ESFR) sprinklers. Sprinklers ESFR sprinklers only warehouse. Not be used for large space and other non-storage areas. But the shelves built-in quick response sprinkler heads should be adopted. Large drop sprinkler nozzle is the standard transition and ESFR sprinkler products. Commonly used in warehouses, now no longer generally used in engineering;
4) When the protection of sites of water density is not less than 12L/min? M2, or by calculation, the work pressure nozzle
by: gaga