I made it for treating plants in the fight against garden and vegetable pests. I assembled it from available materials, mainly an electric motor from a sewing machine and a gear oil pump from a Ural motorcycle. I mounted them on a common base and connected them with a long drive shaft. The sprayer is convenient because it attaches to the wall of any suitable container (bucket, tank, pot) using a bracket and a bolt with a nut.
A panel of dense wood 20—25 mm thick served as the base. Its length depends on the height of the container. The main requirement is that liquid must not get onto the motor.
1 — spray nozzle, 2 — power cord, 3 — switch, 4 — electric motor housing, 5 — shaft connecting the motor to the pump, 6 — bucket with pesticide solution.
The pump, together with a mesh filter, is fastened to the base with a metal bracket into which a pipe made from a piece of copper tubing is soldered opposite the pump outlet.
One end of the drive shaft is filed square for connection to the pump coupling; the other is connected to the motor shaft via a rubber coupling made from a piece of hose (secured with wire clamps). In the middle, the shaft is protected from vibration by an auxiliary bracket.
Any household sprayer nozzle will do. It is connected to the pump with a rubber medical tube. As already mentioned, this design can be installed in any container — from a canister or backpack tank to a small barrel on wheels, that is, it can be mobile. If a centrifugal pump is used instead of a gear pump, the device’s output will increase significantly.
1 — electric motor, 2 — base board, 3 — protective bracket, 4 — pump with filter, 5 — pipe to the sprayer, 6 — pump bracket, 7 — drive shaft, 8 — clamping bolt, 9 — bracket, 10 — rubber coupling.
The electric sprayer is convenient for a homestead plot and in the garden at an electrified country house.
When connecting to the mains and working with this device, the required safety measures must be observed: rubber boots and gloves are mandatory, as is a reliable cable; an intermediate transformer or an automatic mains disconnect device now available for sale is desirable.
«M-K» 12’89, A. REZNIK
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