The fan nozzle has a slit nozzle and an impact nozzle. The spray from the nozzle hole will form a fan - shaped mist. The spray area is rectangular.
Cut (also called slot) fan nozzle. It consists of a washer, a nozzle, and a compression nut, as shown in Figure 8-18. The nozzle is provided with two half-moon grooves straight to each other on the inside and outside of the nozzle, and a square orifices are formed at the tangent of the two grooves.
The atomization principle of the slit fan nozzle: when the pressure liquid enters the nozzle, it is guided by the bottom of the inner half-moon groove and divides the liquid into two opposite flows. After the interaction between the two, flow to the collection of the saving hole, and break into spray droplets. After spraying, it will collide with the two side walls of the outer half moon groove, crack and be bound by it, and guide the bottom of the outer half moon groove, forming a fan spray. It will then collide with the relatively stationary air and further break down into fine fog droplets that will be sprayed onto the lawn.
Impact fan nozzle. It consists of a nozzle cover, a washer, a nozzle and a nozzle body, and a sprayer nozzle. Its atomization principle is: the pressure liquid enters the nozzle through the body cavity of the nozzle, and the liquid from the nozzle hits and forms the fan mist after the guide plate (also known as the reflector). The working pressure of the nozzle is low, generally between 40 and 100kPa, and the droplets are relatively thick to prevent drift. Advantages are: spray view is large (about 130°), the general hydraulic nozzle as long as 60°-90°, spray volume is large, mainly used for herbicide spray.
The impact nozzle consists of a diffuser, a nozzle, a nozzle cover and a barrel. 8-21 nozzles are made of conical cavity holes, and the exit aperture is generally 3? 5 mm. Its atomization principle: the high-pressure liquid from the spray hose flows to the outlet through the nozzle. With the gradual decrease of the flow section, the pressure gradually decreases and the flow velocity gradually increases, and then the high-speed liquid eruption column is formed and erupts far away. The spray is sprayed in droplets after bumping and colliding with relatively stationary air to overcome its own surface tension and viscous force. If a diffuser is installed to block liquid movement, droplets may even be distributed on adjacent lawns, and spraying area may be added. Impact nozzles are characterized by high pressure and a lot of spray. The liquid pressure is 1500? 2500kPa, the spray volume is about 30L/min, the scale is about 15m.
Common sprayer nozzle fault cleaning
1. Investigate the tongue: When the tongue comes out of the nozzle, it will spread out without a round dense part. The main reasons are as follows: the internal part of nozzle a has been severely damaged and should be replaced in time; B. Remove foreign bodies if they are blocked in the movable channel. C The rectifier is out of shape and should be repaired or replaced.2. Leakage of the rotating part of the sprinkler head: the processing of the sprinkler head is not good enough, the hollow shaft and the end face of the 2113 group shaft can not be closely matched, should be repaired or replaced in time.
3, worm and worm nozzle rotation is not normal: impeller idling but 5261 nozzle does not rotate. The main reasons are as follows: The positioning screw between the belt pulley 4102 and the shaft sleeve is loose and should be tightened. B. If the reverse gear is not connected, switch the reverse lever 1653 to connect the gear. If the screw is loose or the pin falls off, check and tighten it.