Fluid sprinkling – spraying – and diffusing – Distributor or nozzle in circumferential wall of flexible...
Patent
1997-10-09
1999-11-16
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Distributor or nozzle in circumferential wall of flexible...
239145, 239542, 23953313, 239DIG12, 138114, A01G 2700, B05B 130
Patent
active
059842091
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an elastic hose with a deformed asymmetrical cross-section for the uniform discharge of liquids or gases via openings which are arranged along the hose and over long hose lengths.
The invention also relates to a method of discharging liquids, gases or fluids into the surroundings, such as the ground or water surfaces, and/or taking in liquids, gases or fluids from said surroundings, via discrete openings distributed in the longitudinal direction, in particular for the purpose of "in situ" treatment.
BACKGROUND OF THE INVENTION
In the case of such cross-sectionally deformed hoses which have wall thicknesses which are adapted in accordance with the functioning principle and are intended for the uniformly metered discharge, or the uniform extraction by suction, of liquids or gases over long lengths by way of outlet locations which are arranged lengthwise at certain distances apart, possible categories are "the admission/extraction of air" and "the admission/extraction of water" with the special criteria of "uniform large-surface-area treatment".
In the case of the already known hoses for the metered discharge of gases or liquids, the outlet quantity at the individual outlet locations depends on the internal pressure at the site where they are arranged. The feed-in pressure provided at one hose end drops sharply as the hose length increases (due to friction and branching losses). Along the hose, this results in normally large differences in outlet quantities at the openings, with the result that, for this reason, only short hose lengths are used if there is a need for a relatively uniform liquid or gas discharge per meter.
The uniform discharge is also adversely affected if mechanical drilling in plastics produces burrs in the bore. In the case of a change in pressure, these burrs are forced into the openings again. This results in outlet openings of different sizes, through which, both in the pressureless state and in the pressurized state, the discharge of uniform quantities at each outlet location is not possible.
SUMMARY OF THE INVENTION
The object of the invention is to develop hoses or the like which are introduced over long lengths, such that their function is not lost as a result of the large laying forces to which they are subjected.
Surprisingly, this is achieved, in the case of a hose of the type mentioned in the introduction, in that, for the purpose of optionally taking in additional liquids or gases, an outer tension-resistant draw-in tube with an open cross-section, in particular open along a generatrix, is provided for accommodating the elastic hose.
In the rest state, the initial cross-sections of the elastic hose can preferably be semicircular, four-sided or pinched-in.
It is favourable if the elastic inner hose is reinforced, in particular in the region of the opening-free walls.
It is favourable to have a filter material between the inner hose and draw-in tube, this filter material preventing extremely fine particles from blocking the openings during take in.
Some walls preferably contain these holes, which are cylindrical in the rest state, of an elasticity such that the through-passage cross-section of these holes is reduced considerably in the case of deformation as a result of superatmospheric pressure/subatmospheric pressure.
Use may be made of a highly elastic acid-proof/alkali-proof temperature-adapted hose.
The hole ducts may also be designed conically with a cross-section which, depending on the application case, increases or decreases from the inside towards the outside.
In accordance with the inventive method mentioned in the introduction, the invention is, moreover, distinguished in that a protective structure which is open along a generatrix and is intended for protecting the actual take in/discharge is provided between the external surroundings and the openings, and a filter material for the extremely fine material which otherwise blocks the take-in openings is provided between take in/discharge and the surroundings.
The m
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patent: 4452397 (1984-06-01), Barton
patent: 4948295 (1990-08-01), Pramsoler
patent: 5129758 (1992-07-01), Lindstrom
Dishong George W.
Evans Robin O.
Kashnikow Andres
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