This invention relates to slurry distributors and has for its object the provision of an improved form of slurry distributor.
Environment regulations are becoming increasingly strict and it is accordingly a more specific object of the present invention to provide a slurry distributor that is designed to comply with existing and future legislation relating to the spreading of slurry.
Further objects of the present invention include the provision of a slurry distributor that can handle varying consistencies of liquid slurry, can handle a high flow rate of liquid slurry and, at the same time, distribute it evenly.
A further object of the present invention is the provision of a simple and effective method of spreading slurry leading to a greater uptake of nitrogen by growing crops from the slurry.
According to a first aspect of the present invention there is provided a slurry distributor comprising a slurry delivery pipe to which, in use, the slurry is supplied, the slurry delivery pipe having a longitudinally extending slot, an injector rotor within which the slurry delivery pipe is disposed, and a plurality of tines and a plurality of outlet ports on the injection rotor, the tines being adapted for cutting into the soil upon movement of the injector rotor over the soil surface and the arrangement being such that, as the outlet ports of the injector rotor pass the slot during rotation of the injector rotor relative to the slurry delivery pipe, the slurry will pass through the slot into the outlet ports.
According to a second aspect of the present invention there is provided a method of spreading slurry that includes the use of a distributor as defined above.
Referring first to
As the slurry distributor is pulled across the ground, in the manner shown in
If the liquid slurry contains fibrous materials, a chopping action will be provided as the outlet ports D of the tines C pass the elongated slot E as the rotor A rotates relative to the delivery pipe B. This will serve to cut up any fibrous materials within the slurry and will promote even spreading of the slurry.
Large metal washers (not shown) are disposed at the two ends of the delivery pipe B and provide a mechanical seal between the delivery pipe B and the injector rotor A. A metal to metal mechanical seal is also produced at F (see
As shown in
The use of the ballast tank G serves to increase the load carried by the hydraulic arms K and thus the downward force applied to the tines C when they penetrate the surface of the soil. The ballast tank G will normally be required when applying slurry to relatively hard, dry ground.
The arrangement is such that, if required, the slurry can flow directly from the tanker to the delivery pipe A via the by-pass pipe H. During most operations, however, the slurry flows at a constant rate into the ballast tank G serving to fill the ballast tank G before flowing on to the delivery pipe A.
When desired, the ballast tank G can be drained by opening a tap located underneath the ballast tank G. This will reduce the mass of the slurry injector for transportation or storage or for a significant change in ground conditions.