Method and apparatus useful in cooling hot strip
First Claim
1. In a hot strip finishing line having a runout table extending between the final mill stand and coiler and a cooling water system for cooling hot strip metal moving on the runout table, the cooling water system including a plurality of water spray bars extending transversely of and above the path of the strip moving over the runout table, a plurality of water discharge nozzles connected in each spray bar for directing cooling water downward onto the top surface of the strip, and means providing water under pressure to the respective spray bars, the improvement comprising,an elongated water trough having water outlet means,means mounting said trough above the runout table and in fixed generally parallel relation with one of said spray bars, said trough having an open top located below and in laterally spaced relation to the nozzles connected in said one spray bar,movable deflector blade means operatively associated with said trough, andactuator means selectively operable to move said deflector blade means between a first position spaced laterally from the nozzles connected in said one spray bar and a second position extending beneath said nozzles in said one spray bar,said deflector blade means in said second position deflecting water discharged from the nozzles connected in said one spray bar into said trough for discharge through said outlet means.
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Accused Products
Abstract
A method of and apparatus for controlling the flow of cooling water to the top of a hot metal strip on a runout table is disclosed. Cooling water is continuously discharged from nozzles in spray bars above the strip and cooling is controlled by selectively diverting the water from selected ones of the spray bars to control the volume and location of the water applied. Movable deflector plates are mounted adjacent predetermined spray bars and actuators are provided to selectively move the deflector plates to deflect water into a fixed trough to be diverted from the top of the strip.
36 Citations
26 Claims
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1. In a hot strip finishing line having a runout table extending between the final mill stand and coiler and a cooling water system for cooling hot strip metal moving on the runout table, the cooling water system including a plurality of water spray bars extending transversely of and above the path of the strip moving over the runout table, a plurality of water discharge nozzles connected in each spray bar for directing cooling water downward onto the top surface of the strip, and means providing water under pressure to the respective spray bars, the improvement comprising,
an elongated water trough having water outlet means, means mounting said trough above the runout table and in fixed generally parallel relation with one of said spray bars, said trough having an open top located below and in laterally spaced relation to the nozzles connected in said one spray bar, movable deflector blade means operatively associated with said trough, and actuator means selectively operable to move said deflector blade means between a first position spaced laterally from the nozzles connected in said one spray bar and a second position extending beneath said nozzles in said one spray bar, said deflector blade means in said second position deflecting water discharged from the nozzles connected in said one spray bar into said trough for discharge through said outlet means.
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16. In a hot strip finishing line including a runout table extending between the final mill stand and coiler and a cooling water system for cooling a hot strip moving on the runout table, the cooling system comprising
a plurality of water discharge outlets in each spray bar for directing cooling water downward onto the top surface of a moving strip on the runout table, water supply means for providing water under pressure to the respective spray bars, and cooling water control means operatively associated with a plurality of said spray bars, said control means being selectively operable to collect water discharged from the discharge outlets in the associated spray bars and to divert the collected water from the top surface of the strip, the cooling water control means including a plurality of elongated troughs extending transversely of the runout table, said troughs each having an open top and being mounted one adjacent to and in fixed generally parallel relation with a separate one of said spray bars with the open top being located below and in laterally spaced relation to the water discharge outlets of the associated spray bar, movable water deflector means operatively associated with each said trough and the adjacent spray bar, said deflector means including an elongated water deflecting plate extending in generally parallel relation to the open top of the associated trough and spray bar, and actuator means selectively operable to move the respective deflector blades between a first position displaced laterally from the water discharge outlets in the associated spray bar and a second position extending beneath the water discharge outlets in the associated spray bar, said deflector blades in said second position deflecting water discharged from the water discharge outlets in the associated spray bar into the associated trough to be collected and diverted from the top surface of a strip moving on the runout table.
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25. A method of cooling metal strip on the runout table of a hot strip finishing mill in which cooling water is applied to the top surface of hot metal strip moving over the runout table from a plurality of banks of spray bars extending above and transversely of the strip, the respective banks including a plurality of elongated spray bars each having a row of outlet nozzles along its length for discharging water downward onto the hot strip, and means for supplying water under pressure to the respective spray bars to be discharged from the nozzles, the method comprising,
continuously discharging water from the nozzles of the spray bars of a plurality of said banks of spray bars, providing a plurality of elongated, open topped troughs one adjacent to and in fixed parallel relation with each of a plurality of spray bars in at least one bank of spray bars, said troughs being located in laterally spaced relation to the row of nozzles in the adjacent spray bar, providing a movable water deflector in operative association with each trough and the adjacent spray bar, selectively moving the water deflectors between a first position providing an unobstructed path for the water discharged from the row of nozzles in the associated spray bar to the top surface of strip moving on the runout table and a second position extending beneath the row of nozzles and deflecting the water discharged therefrom into the associated trough, and permitting the water deflected into the respective trough to flow therefrom without contacting the strip to thereby selectively control both the volume and distribution of cooling water applied to the top surface of the strip.
Specification