How mobile sprayers work

Update:15 Mar 2019
Summary:

The motorized sprayer narrowly refers to the 18-type ba […]

The motorized sprayer narrowly refers to the 18-type backpack-type mist sprayer. It is powered by a 1E40F gasoline engine (1.6 hp) and uses a high-pressure centrifugal fan. The engine crankshaft directly drives the fan shaft to rotate at 5,000 rpm. The storage tank is both a liquid storage tank and a storage tank. It is only necessary to replace different parts in the storage tank. The nozzle is mainly composed of plastic parts, and the same main tube can be used for both mist and dusting, and different parts can be replaced on it. The engine and fan are fixed to the frame by means of damping devices to reduce the vibration generated by them during high-speed rotation to the frame. The working principle of the mist: When the engine crankshaft drives the fan impeller to rotate at a high speed, the high-pressure airflow generated by the fan, most of which flows through the fan outlet to the nozzle, and a small part flows through the inlet valve, hose and filter to the storage tank. The space on the liquid surface exerts a certain pressure on the liquid surface, and the liquid reaches the nozzle (the so-called air pressure infusion) through the powder door, the water outlet plug, the infusion tube and the switch under the action of the wind pressure.

The nozzle is located at the throat of the mist nozzle. When the airflow sent from the fan outlet passes through here, the cross section suddenly shrinks, the flow rate suddenly increases, and a negative pressure is generated at the nozzle. Under the combined action of the positive pressure in the storage tank and the negative pressure here, the source is ejected from the nozzle, just in contact with the high-speed airflow from the nozzle. Because the flow rates of the two are very different, and the direction is vertical, the high-speed airflow will cut the fine stream or coarse droplets from the nozzle into small droplets with a diameter of 100~150μm, and will be carried by the airflow to a distant place. The air stream further disperses the fine droplets and finally settles. Most of the high-speed airflow generated from the fan flows through the fan outlet to the elbow and nozzle, and a small portion enters the powder blowing pipe through the intake valve. Due to the high wind speed and high wind pressure, the airflow is blown out from the small hole of the powder blowing pipe, and the powder at the bottom of the storage tank is loosened and blown to the powder door (so-called airflow powder). At the same time, since most of the high-speed airflow passes through the elbow of the fan outlet, a certain degree of vacuum is generated at the mouth of the powder feeding tube. Therefore, when the powder door switch is opened, the powder can pass through the powder door, and the powder feeding tube is sucked into the elbow, and A large amount of high-speed airflow is mixed and blown to the crop through a nozzle.