水雾喷头是在一定压力的作用下，利用离心或撞击原理将水流分解成细小水雾滴的喷头，分类离心雾化较高压力，良好的电绝缘性，通道小易堵塞，一般是高速喷头，撞击较低压力，水雾粒径比较大，一般是低速喷头，设备整体冷却保护，火灾区附近的建、构筑物连续喷水进行冷却。下面川消小编来讲讲水雾喷头主要性能参数以及布置要求。

Water mist nozzle is a nozzle that uses the principle of centrifugation or impact to decompose water flow into small water mist droplets under a certain pressure. It is classified as centrifugal atomization with high pressure, good electrical insulation, small channels and easy blockage. It is generally a high-speed nozzle, with lower impact pressure and larger water mist particle size ratio. It is generally a low-speed nozzle, and the equipment is cooled and protected as a whole. Buildings and structures near the fire area are continuously sprayed with water for cooling. Next, let's talk about the main performance parameters and layout requirements of the water mist nozzle.

水雾喷头主要性能参数

Main performance parameters of water mist nozzle

工作压力：通常喷头的工作压力越高，其水雾滴粒径愈小，雾化效果越好，灭火和冷却的效率也就越高用于灭火的水雾喷头，其工作压力应为0.35Mpa—0.8Mpa ，用于防护冷却的水雾喷头，其工作压力应为0.2Mpa—0.6Mpa.

Working pressure: The higher the working pressure of the nozzle, the smaller the droplet size of the water mist, the better the atomization effect, and the higher the efficiency of fire extinguishing and cooling. The working pressure of the water mist nozzle used for fire extinguishing should be 0.35Mpa -0.8Mpa. The working pressure of the water mist nozzle used for protective cooling should be 0.2Mpa -0.6Mpa

雾化角：水雾喷头常见的雾化角有45°、60°、90°、120°、150°等五个规格

Atomization angle: There are five common specifications of atomization angles for water mist nozzles, including 45 °, 60 °, 90 °, 120 °, and 150 °

流量系数：水雾喷头的流量系数K为16102，水雾喷头K系数由水雾喷头生产厂家自己确定

Flow coefficient: The flow coefficient K of the water mist nozzle is 16 to 102, and the K coefficient of the water mist nozzle is determined by the manufacturer of the water mist nozzle

有效射程：指喷头水平喷射时，水雾达到的高点与喷口之间的距离，水雾锥是指在水雾有效射程内水雾形成的圆锥体。同一水雾喷头，雾化角小，射程则远，反之则近。在有效射程范围内的水雾强度能够达到设计要求。可保证灭火或防护冷却要求，因此，水雾喷头与保护对象的有效距离不应大于水雾喷头的有效射程

Field of fire: refers to the distance between the high point of the water mist and the nozzle when the nozzle sprays horizontally. The water mist cone refers to the cone formed by the water mist within the Field of fire. The same water mist nozzle has a small atomization angle and a long range, while the opposite is true. The water mist intensity within the Field of fire can meet the design requirements. It can meet the requirements of fire extinguishing or protective cooling. Therefore, the effective distance between the spray nozzle and the protected object should not be greater than the Field of fire of the spray nozzle

水雾滴平均直径：压力越大，雾滴平均直径越小。水雾滴大小直接影响灭火效果 。不应太小：小于300时，达不到保护对象的表面。不应太大：太大会影响水雾的气化效果，使水喷雾的冷却和窒息作用降低粒径合理的范围

Average diameter of water droplets: The greater the pressure, the smaller the average diameter of droplets. The size of water mist droplets directly affects the fire extinguishing effect. It should not be too small: when it is less than 300, the surface of the protected object cannot be reached. Not too big: too big will affect the gasification effect of water mist, so that the cooling and suffocation effect of water spray can reduce the reasonable range of particle size

水雾喷头布置要求

Layout requirements for water mist nozzles

水雾喷头

spray nozzle 

01

01

保护对象的水雾喷头数量应根据公式（1）和公式（2）计算确定

The number of water mist nozzles for protecting objects should be calculated and determined according to formulas (1) and (2)

02

02

喷头的布置应使水雾直接喷射和完全覆盖保护对象

The arrangement of the nozzle should ensure that the water mist is directly sprayed and completely covers the protected object

03

03

喷头与保护对象之间的距离不得大于水雾喷头的有效射程

The distance between the sprinkler and the protected object shall not be greater than the Field of fire of the spray nozzle

04

04

喷头、管道与电气设备带电（裸露）部分的净距应符合现行有关标准的规定

The safety clearance between nozzles, pipelines, and live (exposed) parts of electrical equipment should comply with the current national standards

保护储罐、球罐

Protecting storage tanks and spherical tanks

01

01

当保护对象为甲、乙、丙类液体和可燃气体储罐时，水雾喷头与保护储罐外壁之间的距离不应大于0.7M

When the protected object is Class A, B, C liquid and combustible gas storage tanks, the distance between the water mist nozzle and the outer wall of the protected storage tank should not exceed 0.7M

02

02

当保护对象为球罐时，水雾喷头的布置尚应符合下列规定：

When the protected object is a spherical tank, the arrangement of the water mist nozzle should also comply with the following regulations:

（1）水雾喷头的喷口应朝向球心

(1) The nozzle of the water mist nozzle should face the center of the ball

（2）水雾锥沿纬线方向应相交，沿经线方向应相接

(2) The water mist cone should intersect along the latitude direction and connect along the longitude direction