Device for cooling a metal strip
A technology for metal strip and strip surface, applied in the direction of furnace, furnace type, heat treatment equipment, etc., can solve the problems of uneven cooling, uneven outflow conditions, strip distortion and other problems, and achieve the effect of uniform cooling
Inactive Publication Date: 2008-07-30
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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[0020] According to FIGS. 1-3 , the cooling device for the metal strip 1 is shown comprising a housing 2 through which the metal strip 1 to be cooled is continuously conveyed in the feeding direction s. Several bellows 3 for cooling air, such as a gas mixture of 95% by volume nitrogen and 5% by volume of hydrogen, are arranged on both sides of the metal strip 1 . Connected to the above-mentioned bellows 3 are nozzle strips 4 which extend side by side parallel to each other and form flow channels 5 between them. The nozzle strip 4 itself is formed with a gas channel 6 of rectangular cross-section, which tapers from the bellows 3 and has a circular nozzle opening 7 on the side facing the metal strip 1 . The nozzle openings 7 are distributed over the length of the nozzle strips 4 connected to the respective bellows 3 and are arranged in a row in order to obtain a nozzle area with circular jets evenly distributed over the surface portion of the metal strip 1. Beam nozzles, as can...
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Abstract
A device for cooling a metal strip (1) is disclosed, said device comprising at least two nozzle areas opposite to a metal strip (1) conveyed continuously in its longitudinal direction, said nozzle areas comprising pairs of Nozzles for the corresponding strip surface, connected to a wind box (3) for cooling gas, and the device also includes flow channels (5) arranged between the nozzles for discharge from the nozzles on the strip surface Steering cooling airflow. In order to provide favorable cooling conditions, it is proposed according to the invention that said nozzles are formed in groups of nozzle bars (4) parallel to one another at lateral distances, said nozzle bars comprising gas channels (6) connected to the bellows, said gas channels There are nozzle openings (7) distributed over the entire length of the nozzle bar (4) aligned at the respective strip surface, and the fluid channels (5) for discharging the cooling air flow are arranged to extend transversely to the bellows (3) between the nozzle strips (4).
Description
technical field [0001] The invention relates to a device for cooling a metal strip, the device comprising at least two nozzle regions arranged opposite each other with respect to the metal strip continuously conveyed in its longitudinal direction, the two nozzle regions, the nozzle regions comprising a number of nozzles aligned with the respective strip surfaces, connected to bellows for cooling gas, and the device further comprising flow passages provided between the nozzles for discharge from the nozzles on the surface of the strip Turn on the cooling airflow. Background technique [0002] In order to prevent the formation of undesired microstructures or deposits after the heat treatment of metal strips, in particular made of steel, these metal strips must be cooled very quickly by means of a shielding gas, usually a mixture of hydrogen and nitrogen, In order to avoid oxidation reactions in the area of the strip surface. In order to achieve the required cooling gradien...
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