Fluid sprinkling – spraying – and diffusing – Rigid fluid confining distributor – Having interior filter or guide
Patent
1997-08-20
1999-05-25
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Rigid fluid confining distributor
Having interior filter or guide
B05B 114
Patent
active
059063203
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a wide jet nozzle of the type having an elongated housing made of bent sheet metal and extending over the width of a substrate, such as a web of textile. A discharge port is located on the housing, and defines a discharge plane.
The German patent 25 04 856 C 3 discloses a wide jet nozzle, whose fluid medium, e.g. wash water for textile webs, is fed from one end in the longitudinal direction of the housing of the wide jet nozzle. The housing is tapered from the feed end toward the opposite end, so that the flow cross-section decreases and the pressure remains somewhat constant over the width of the jet. Nevertheless, a one-sidedness (i.e., a degree of unevenness in the flow) of the nozzle jet is not easily avoided in this specific embodiment. This one-sidedness results in a degree of lateral application of force to the web which, for the most part, must be avoided.
For this purpose, German Patent 23 34 998 A 1 discusses combining two such wide jet nozzles with one another, each of the nozzles extending from the web center to one web edge and, in each case, the fluid medium being fed via a feed conduit extending in the longitudinal direction of the housing of the two wide jet nozzles and discharging in the center.
This specific embodiment is costly and has design disadvantages having to do with the necessity of feeding the fluid medium from the two sides.
SUMMARY OF THE INVENTION
The present invention is directed to the problem of developing a wide jet nozzle of this type that will not function unevenly, so that feeding the fluid medium will require less outlay for construction and less space. The apparatus comprises an elongated housing having a median plane and a longitudinal axial direction. The housing is made of bent sheet metal and is sized to extend over the width of the substrate. Two mutually opposing, parallel, bent nozzle lips extending in the longitudinal direction of the housing define a discharge port and a discharge jet plane.
A single feed conduit is located in the center of the housing (viewed transversely to the direction of fluid flow into the housing) and discharges fluid into the housing transversely to the discharge jet plane.
At least three deflection surfaces, one following the other in the direction of flow, which are approximately transverse to the local direction of flow and off of which the flow is in each case deflected by 90.degree., are provided. These deflection surfaces are located along a plane transverse to the longitudinal direction of the housing.
The single feed conduit discharges from above or below into the wide jet nozzle, so that the one-sidedness from the feed direction is suppressed. Although the feed takes place at only one location in the center of the wide jet nozzle, care is taken to even cut the discharge pressure through a repeated deflection of the fluid, while avoiding any preference for the area surrounding the center.
To even out the outflow toward the edges, provision can also be made in the case of the present invention for the housing cross-section to be reduced in a generally known way from the center toward both sides.
To achieve an adequate inlet cross-section, the feed conduit can empty into a specially provided bulge of the housing.
In order to better even out the bath discharge, a tubular baffle member can be disposed between the inner walls of the housing in a median plane below the feed conduit, its diameter being approximately one third to one half the diameter of the feed conduit.
The ratio of the length of the nozzle lips length e to the nozzle width d is at least 8:1; again to even out the bath discharge. (The expression "bath" is intended to include treatment fluids of any type thus, besides pure water, for example, dyeing fluids, wetting-agent liquors and other finishing fluids, as well.)
BRIEF DESCRIPTION OF THE DRAWINGS
Referring now to the drawings, wherein like numerals indicate like parts throughout, the principal components of a preferred embodiment of the invention are ill
REFERENCES:
patent: 4132363 (1979-01-01), Kruger
patent: 4347805 (1982-09-01), Ernest
Eduard Kusters Maschinenfabrik GmbH & Co.
Kashnikow Andres
Nguyen Dinh Q
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