Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – At or beyond outlet
Patent
1990-10-22
1992-06-02
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
At or beyond outlet
266259, B05B 706
Patent
active
051180413
DESCRIPTION:
BRIEF SUMMARY
The inventon relates to an apparatus for the linear spraying of water for the cooling of metal sheets, comprising a conduit supplied with compressed air and a longitudinal water chamber equipped with water flow-off means, the said means opening out between means for the directed ejection of the compressed air which are provided in the air conduit, to form a spray head.
The patent FR-A-2,578,449 makes known a spraying apparatus for the thermal treatment of metal sheets of large width, which has a cylindrical horizontal water-supply pipe equipped with a flow-off slit along its upper generatrix. This pipe is arranged in the vertical plane of symmetry of a hollow body supplied with compressed air and separated into two longitudinal conduits by means of a hopper which, at its inlet, receives the water flowing off from the pipe and which, at its outlet, forms a linear spray head. This head has a central water-outflow slit contained between two symmetrical rows of ports communicating with the longitudinal compressed-air supply conduits.
This apparatus is intended to allow wide variations in the flow of the cooling water, at the same time maintaining uniform distribution over the length, without the need for geometrical and/or dimensional modifications of the spray head. However, it emerged that the uniformity of the cooling jet to come in contact with the metal sheet to be treated depends greatly on the horizontality of the water-supply pipe and on the tolerances of the various component elements of the apparatus. In addition to the constant flow of water from one end of the spray head to the other, the elementary jets forming the film-like jet must reach the surface to be cooled in an identical direction and in planes perpendicular to the direction of run of the sheets from one edge of the sheet to the other. Now because of the production tolerances, arranging the compressed-air outlet ports at the same level as the water-supply slit can be conducive to deviations of some elementary jets in relation to the general direction, the result of these deviations being non-uniformity of cooling of the transverse zone of the sheet passing in front of the sprayer.
The object of the invention is an apparatus which is comparable to that described above, but in which the said disadvantages are eliminated.
The spraying apparatus according to the invention is characterized in that the means for the flow-off of the cooling water consist at least partially of cylindrical tubes distributed along the water chamber, the said tubes having characteristics of dimension and/or of shape which impart a considerable pressure loss to the stream of water passing through them, minimising the local pressure variations capable of occurring in the water chamber at the inlet of the tubes and defining directions of impact of the elementary spray jets which are identical over the entire length of the sprayer.
The explanations and figures given below by way of example will make it possible to understand how the invention can be put into practice.
FIG. 1 is a partially cut away perspective view of an exemplary embodiment of a spraying apparatus according to the invention, the jet of which is directed downwards.
FIG. 2 is a cross-sectional view of the apparatus of FIG. 1.
FIG. 3 is a view according to the arrow III of FIG. 2.
FIG. 3A is an enlarged view of the portion A of FIG. 3.
FIG. 4 is a view according to IV--IV of FIG. 3.
FIG. 5 is a cross-sectional view of an exemplary embodiment of an apparatus, the jet of which is directed upwards.
FIG. 6 is a front view of a blading segment.
FIG. 7 is a top view of the segment of FIG. 6.
FIG. 8 is a sectional view according to VIII--VIII of FIG. 6.
FIG. 9 is a sectional view according to IX--IX of FIG. 6.
FIG. 10 is a sectional view according to X--X of FIG. 6.
FIG. 11 is a perspective view of the air conduits.
FIG. 12 is a view in horizontal projection of the air conduits of FIG. 11.
FIG. 1 illustrates an exemplary embodiment of a linear spraying apparatus. This sprayer is intended more particularly for ge
REFERENCES:
patent: 4711431 (1987-12-01), Viannay et al.
patent: 4936882 (1990-06-01), Chen et al.
patent: 5012980 (1991-05-01), Viannay et al.
Chastang Georges J. B.
Chezlepretre Bernard C. R.
Lascoux Pierre G.
Lefevre Paul L. B.
Bertin & Cie
Kashnikow Andres
Morris Lesley D.
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