| 摘要 |
A composition dosing device for agricultural sprayers intended to spray plant nutrients as well as pesticidal control agents to control insects, fungi or weed harmful to cultivated crops and thus not desirable, comprising at least one container for active and concentrated substance and a piston pump for the container or containers of for each container as well as a control means for adjusting the pump flow/flows admixed with a flow of pure water from a water tank. The dosing pump or each dosing pump is preferably at least of the two-piston type, in which the reciprocal movement of the respective pistons (21) is positively controlled by means of a double-acting fluid control cylinder (4) such that when one piston (21) performs a pump stroke, the other performs a suction stroke. |
