Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner
Patent
1993-03-29
1994-07-19
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Fluid pressure responsive discharge modifier* or flow...
Fuel injector or burner
239542, 138 43, B05B 130
Patent
active
053301072
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an emitter which compensates water pressure for use in drip irrigation pipes. More particularly the invention relates to a one piece water regulating emitter embodied inside an under pressure conduit, which enables the water emission rate to be controlled permanently and independently of the pressure variations applied on the emitter, inside the conduit.
2. Background of the Invention
Drip irrigation is recognized as a superior system of water irrigation for various cultivations. The objective of the system is to irrigate a precise area of soil around a plant in order to:
a) Avoid compacting of soil
b) Minimize weed growth
c) Minimize water consumption
d) Minimize the energy and labor costs of irrigation
For this reason there is a great need for drip irrigation systems that are highly economical in their construction, installation, operation, maintenance and storage.
One of the most important functions of the emitter is the compensation of various water pressures applied on the emitter, so that water is emitted at a constant rate of flow at the emission outlet points of the emitter and reaches the plant in a constant desired volume, as it is actually needed and where it is needed.
DRAWBACKS OF THE EXISTING DRIP IRRIGATION SYSTEMS TODAY
There are numerous systems of drip irrigation available. Not all of them give full satisfaction to the grower. Many of them are not suitable for use more than one season, since they clog quickly. Most importantly, the emission of water from the emitters is not uniform in volume, due to their inability to compensate the pressure variations of the water applied on the emitter. Thus, the plants receive different volume of water at different points, all along the linear sowed or planted lines. This fact results in non-equal plant growth.
SUMMARY OF THE INVENTION
The objectives of the present invention are the following:
1) To overcome today's existing difficulties and drawbacks by making available a flexible emitter with elastic properties, which can be embodied in the inside of a conduit and has the capability to compensate pressure variations with self-regulation. The emitter has part of its internal surface exposed to the water pressure existing inside the conduit, which exposed part is deformed each time by the applied pressure.
2) To provide an emitter of the type described above, which self-regulates to provide a constant water flow, independently of the topographical conditions or the pressure variations of the water applied on the emitter.
3) To provide an emitter of the type described above which can be used in irrigation conduits of a substantially greater length.
4) To provide an emitter made in such a way so that passage is formed between the outer sculptured wall of the emitter and the inner wall of the water conduit. This passage mainly consists of:
a) holes opened on the emitter for water entrance
b) the formed passage labyrinth which leads the water into the emitter
c) the flexible and elastic part (hereinafter "deformable part") of the labyrinth passage, which self-regulates to compensate water pressure variations inside the water conduit.
5) To provide an emitter on which a peripheral channel is placed in the middle of the emitter's length, where the water arrives after passing through the deformable self-regulating part (which controls the flow rate). The water exits the peripheral channel, through preopened holes on the conduit, exactly positioned on the point where the peripheral channel is placed. The water then passes out of the conduit to irrigate the soil.
6) To provide an emitter upon which the existing peripheral channel as described above is equipped with side rings, so that these rings protect the channel from compression on the inside wall of the water conduit.
7) To provide an emitter as described above, which, being symmetrical, does not require any special positioning inside the conduit, but can be positioned either by the front or back sides, since the
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patent: 3815636 (1974-06-01), Menzel
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patent: 4856552 (1989-08-01), Hiemstra
patent: 4971253 (1990-11-01), Lazarus
patent: 5111996 (1992-05-01), Eckstein
patent: 5236130 (1993-08-01), Hadar
Eurodrip S.A.
Kashnikow Andres
Morris Lesley D.
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