Fluid sprinkling – spraying – and diffusing – With cleaning means – drip collecting – waste disposal or soil... – Waste disposal or drip collecting
Patent
1996-02-16
1998-08-04
Morris, Lesley D.
Fluid sprinkling, spraying, and diffusing
With cleaning means, drip collecting, waste disposal or soil...
Waste disposal or drip collecting
239127, 239215, 239222, B05B 128, B05B 302
Patent
active
057881561
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for spraying a liquid, wherein a rotating surface is embodied to be partially enclosed by a housing with an opening leaving a partial circumference free, and the device for collecting retained drops has a reservoir and a flow path in whose circulation a pump is provided which is embodied to combine collected liquid with the inflowing liquid.
In previously known devices of this type the drops are flung away on all sides perpendicularly with their axis of rotation by a centrifugal disk. Under the influence of gravity the drops form a so-called spray cone, whose diameter can be affected by the rpm of the centrifugal disk. To achieve a sufficiently fine and even drop size it is necessary to drive the centrifugal disk at high rpm of 10,000 to 15,000 revolutions per minute, for example. Although in the process it is possible to achieve a very even drop size of 35 .mu., for example, the hollow cone created in the course of spraying has a relatively large diameter of, for example, 100 to 120 cm, which is undesirable for many purposes.
Such devices are used in agriculture for covering areas with herbicides. In order to be able to treat the areas between the rows of useful plants in a well-directed manner, it is necessary to set the width of the spray as exactly as possible and to aim the flow of drops as exactly as possible toward the surface.
A device for spraying a liquid in accordance with the species is known from U.S. Pat. No. 2,545,489. The rotating surface is partially enclosed in a housing and keeps an opening free over a part of the circumference. It has a reservoir and a flow path for collecting drops which were retained, in whose circulation a pump is provided for reuniting the collected liquid with the inflowing liquid.
This pump which returns the collected liquid is embodied as a housing revolving in the shape of a truncated cone which, driven by a gear wheel, rotates at approximately 1/10 of the rpm of the rotating surface. A second hub, which is inclined in respect to the axis of circulation of the rotating surface, is provided for this purpose, as well as a reduction gear with gear wheels which reduces the rpm of the shaft correspondingly. Finally, this device has a metering device which is embodied in a very complicated manner, which again provides the rotating surfaces with the inflowing liquid and the returned liquid partially separated by means of two valve disks.
The British document GB 2 164 270 shows a device wherein the pump is embodied as an axial pump for returning the liquid.
SUMMARY OF THE INVENTION
It is the object of the invention to recite a segment rotary nozzle which can be manufactured with reduced expense and further than that has a longer life expectancy.
This object is attained in accordance with a device of the species in that a conveying surface of a pump, preferably a friction pump, is disposed coaxially with the axis of rotation of the rotating surface. The liquid is returned to the rotating surface in a particularly cost-effective and maintenance-free manner by means of this step. Complicated gears can be omitted.
Because the rotating surface and the conveying surface are embodied as parts of a single rotating part, the pump can be manufactured particularly advantageously.
It is achieved by the step of the rotating surface having an axis of rotation which is inclined at an angle in respect to the horizontal that gravity makes the return of the liquid in the housing easier.
If the opening is embodied to be adjustable it is possible, for example, to also adapt the directed stream exiting through the opening to the desired spraying width by changing the opening sector. If the position of the opening is changed it is possible to spray upward, for example.
So that the caught drops can be better collected it is advantageous if the housing has bars on the inside for guiding the caught liquid.
The aspiration of the collected liquid at the termination of the spraying work is made easier in that a metering pump for sup
REFERENCES:
patent: 2063048 (1936-12-01), Norris
patent: 2545489 (1951-03-01), Norris
patent: 2749179 (1956-06-01), Almquist
patent: 2967667 (1961-01-01), Norris
patent: 2967668 (1961-01-01), Norris
patent: 3267701 (1966-08-01), Mandarino
patent: 4553700 (1985-11-01), Snyder et al.
patent: 4616783 (1986-10-01), Weber et al.
Busch Georg
Dopp Siegfried
Mantis VLV-Spruhgerate GmbH
Morris Lesley D.
Striker Michael J.
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