Device for cooling a metal strip
A technology for the surface of metal strips and strips, applied in furnaces, furnace types, heat treatment equipment, etc., can solve problems such as uneven cooling, strip distortion, uneven outflow conditions, etc., and achieve the effect of uniform cooling
Inactive Publication Date: 2010-09-15
EBNER-INDUSTRIEOFENBAU GMBH
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Problems solved by technology
In addition to the fact that compared with flat nozzles, a more uniform application of the cooling gas to the strip surface can generally be achieved in the case of nozzle regions formed with circular nozzles, which in this known device is achieved by means of bellows penetrations. through the resulting flow channels between the individual nozzle rows, which leads to non-uniform outflow conditions with the attendant risk of strip distortion due to non-uniform cooling, which requires the subsequent removal of the metal strip straighten
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[0021] according to Figure 1-3 , the shown cooling device for a metal strip 1 comprises a housing 2 through which the metal strip 1 to be cooled is conveyed continuously in the feed direction s. Several bellows 3 for cooling air such as a gas mixture of 95% nitrogen by volume and 5% hydrogen by volume are arranged on both sides of the metal strip 1 . Nozzle bars 4 are connected to the aforementioned bellows 3 , said nozzle bars extending parallel to one another alongside one another and forming flow channels 5 between them. The nozzle strip 4 itself is formed by gas channels 6 with a rectangular cross section, which taper from the bellows 3 and have circular nozzle openings on the side facing the metal strip 1 . The nozzle openings are distributed over the length of the nozzle bar 4 connected to the corresponding bellows 3 and are arranged in a row in order to obtain a nozzle area with circular jets uniformly distributed over the surface part of the metal strip 1 nozzles, s...
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Abstract
A device for cooling a metal strip (1) is disclosed, comprising at least two opposing nozzle regions facing the metal strip (1) continuously conveyed in the longitudinal direction thereof, with nozzles directed at the corresponding strip surface connected to collector boxes (3) for a cooling gas with flow channels (5) provided between the nozzles for escape of the cooling gas deflected from the strip surface from the nozzle. According to the invention, advantageous cooling conditions are achieved, by a grouped arrangement of nozzles in parallel adjacent nozzle strips (4) with a lateral separation from each other with nozzle openings (7) distributed over the length of the nozzle strips (4) directed at the corresponding strip surface and connected to gas channels (6) which are connected to the collector boxes (3) and the flow channels (5) for escape of the cooling gas flows are provided between the nozzle strips (4) running perpendicular to the collector boxes (3).
Description
technical field [0001] The invention relates to a device for cooling a metal strip, said device comprising at least two nozzle areas arranged opposite each other with respect to a metal strip conveyed continuously in its longitudinal direction, said nozzle areas comprising a number of nozzles aligned with the respective strip The nozzles on the surface are connected to a wind box for cooling gas, and the device also includes flow channels provided between the nozzles for discharging the cooling air flow from the nozzles diverted on the surface of the strip. Background technique [0002] In order to prevent the formation of undesired structures or deposits after the heat treatment of metal strips made of steel in particular, these metal strips must be cooled very quickly by means of a protective gas, usually a mixture of hydrogen and nitrogen, In order to avoid oxidation reactions in the region of the strip surface. In order to achieve the required cooling gradient for steel...
Claims
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IPC IPC(8): C21D9/00C21D9/573
Inventor P·艾伯纳G·埃克特斯贝格尔
Owner EBNER-INDUSTRIEOFENBAU GMBH