| 摘要 |
A closed agricultural chemical batching, measuring and mixing system is disclosed for mounting to a sprayer tending truck. The system includes a measuring tank on which a partial vacuum is drawn by opening a connection to the intake manifold of the internal combustion engine of the truck. The measuring tank is in turn communicated to at least one manifold having numerous valve control inlets, all communicated to discrete agricultural chemical containers which can include highly toxic liquid chemicals. At the inlet remote from the mixing tank, the manifold communicates to a supply of surfactant. Preselected amounts of the liquid chemicals are sequentially drawn by the partial vacuum through the valve controlled manifold and to the measuring tank in which they are accumulated. The surfactant is then drawn through the manifold and into the measuring tank to flush the system. As the chemicals and surfactant are drawn into the measuring tank, the fumes created by the chemicals in the measuring tank are drawn into the intake manifold of the engine and rendered substantially nontoxic. After mixing of the liquid chemicals and surfactant in the measuring tank, the vacuum is broken and the batch is dumped through a dump valve at the bottom of the tank. Simultaneously, a stream of water is discharged from a water storage tank on the tending truck through a conduit to a spray tank on a tractor spraying rig. The measured batch is drawn into the stream of water at less than atmospheric pressure through an induction manifold interposed in the water conduit and diluted by the water. Provision is made to introduce wetable powders into the stream of water in addition to the liquid agricultural chemicals. Thus, a closed mixing system is provided for both liquid and powdered agricultural chemicals. |
