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Tips for using agricultural sprayers

Knapsack sprayer use
1. To install the sprayer parts correctly. Check whether each connection is leaking. When using, install clean water and test spray first, and then install the medicine.
2. In formal use, you must add the medicine first and then the water, and the liquid level of the medicine should not exceed the safe water level. Before spraying, move the rocker more than 10 times to increase the air pressure in the barrel to the working pressure. Do not use excessive force when turning the joystick to avoid explosion of the air chamber.
3. When the chemical liquid is first filled, since the air chamber and the spray bar contain clear water, the concentration of the chemical liquid sprayed in the first 2 to 3 minutes of spraying is low, so pay attention to the supplementary spray to avoid affecting the control effect of pests and diseases.
4. After the work is finished, you should pour out the remaining liquid medicine in the barrel in time, wash it with clean water and pour it out. At the same time, check whether there is water in the air chamber. If there is water, remove the water connector to release the water.
5. If the sprayer is not used for a short period of time, the main parts should be cleaned, wiped dry and installed, and stored in a cool and dry place. If it is not used for a long time, grease all metal parts to prevent rust.

Common faults and troubleshooting methods in use:

Insufficient spray pressure and poor atomization: If the water inlet ball valve is set up by dirt, you can remove the water inlet valve and use a cloth to remove the dirt; if the cup is damaged, you can replace it with a new one; if the connection part is not installed The sealing ring, or the air leakage due to the damage of the sealing ring, can be installed or replaced.
No fogging: If the oblique hole of the nozzle body is blocked by dirt, the oblique hole can be cleared; if the nozzle is blocked, the nozzle can be removed and cleaned, but hard objects such as iron wire or copper needle can not be used to poke the nozzle to prevent the hole from expanding , Make the spray quality worse; if the filter screen in the casing is blocked or the water valve ball is set up, the filter screen should be cleaned and the dirt that has set up the ball should be cleaned.
The switch leaks or cannot be screwed: if the switch cap is not tightened, the switch cap should be tightened; if the gasket on the switch core is worn, the gasket should be replaced; the switch cannot be screwed because it has been placed for a long time or used for a long time, the switch The core is stuck due to the corrosion of the agent, the parts should be removed and cleaned in kerosene or diesel; if it is difficult to remove, it can be soaked in kerosene for a period of time, and then it can be removed after disassembly. Do not hit with hard objects.
Water leakage in each connection part: if the joint is loose, the nut should be tightened; if the washer is not flat or damaged, the washer should be leveled or replaced; if the washer shrinks and hardens, it can be soaked in animal oil before use .
Advantages and use methods of ultra-low volume sprayers
Advantages and methods of using ultra-low sprayers to prevent flowers, trees and lawns
Compared with commonly used sprayers, ultra-low-volume sprayers are fast, efficient, portable, and cost-saving in preventing and controlling flowers, lawns, and crop pests and diseases. The specific performance is:

Low water consumption
The ultra-low-volume sprayer uses pesticide stock solution, or only needs to be diluted very low, so it does not require a lot of water.
Low dosage
The spray liquid per mu is about 100 grams, not tens of kilograms or even hundreds of kilograms. Therefore, the labor intensity can be greatly reduced during use, and labor is saved.
Even droplet distribution
The ultra-low-volume sprayer does not spray the medicinal solution directly on the plants, but uses the wind to disperse and drift the droplets with a diameter of only tens of microns, and then evenly distribute the droplets on the plants under the action of the "micro airflow" around the plants The front, back and side of the leaf and the whole plant. In this way, it has a higher killing rate on pests than the medicament diluted with a large amount of water, especially for certain pests that have developed resistance. Because the killing function of pesticide stock solution is several times or even dozens of times higher than diluted with water.
Easy to use
The head of the hand-held ultra-low-volume sprayer is always kept at a height of about 1 meter above the plant when spraying. Because this type of sprayer omits the liquid spray nozzle, the liquid flows out by itself when the bottle is put down. Therefore, before the motor is turned on, the medicine bottle should be at the bottom and the handpiece at the top. When spraying, you should start the motor first, and then change the position of the medicine bottle and the handpiece so that the medicine bottle is up, the mouth of the bottle is down, and the bottle body is perpendicular to the ground, and the liquid medicine will flow out by itself.
When spraying, start from the leeward direction, and the walking route should be separated by a certain distance, which is the spray pattern. The size of the spray fan should be flexibly controlled according to the size of the wind speed. When the wind speed is small, the spray width should be smaller, otherwise it should be larger, generally 3 meters to 3.5 meters is appropriate. The spraying time is best to choose in the morning, afternoon or cloudy, to avoid the hot sun. It is best to use systemic agents, fumigants or stomach poisons for ultra-low-volume sprays. The dosage is generally about 50 grams per mu. If you need to add a proper amount of water, you can use the "equivalence method".