US3648996A - Apparatus for cooling high temperature metal plates - Google Patents

Apparatus for cooling high temperature metal plates Download PDF

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Publication number
US3648996A
US3648996A US3464A US3648996DA US3648996A US 3648996 A US3648996 A US 3648996A US 3464 A US3464 A US 3464A US 3648996D A US3648996D A US 3648996DA US 3648996 A US3648996 A US 3648996A
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US
United States
Prior art keywords
conveyors
cooling
high temperature
rolling line
metal plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US3464A
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English (en)
Inventor
Toshiya Yonezawa
Katsuya Kogumasaka
Katsuhiro Kinoshita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
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Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
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Publication of US3648996A publication Critical patent/US3648996A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
    • B21B43/08—Cooling beds comprising revolving drums or recycling chains or discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • ABSTRACT An apparatus for cooling high-temperature thick steel plates comprising a transmission unit consisting of endless conveyors running rectangularly across the rolling -or operation line, a unit for loading high-temperature thick steel plates onto said transmission unit and a cooling water jetting unit provided at said transmission unit to have jets directed to the upper and bottom surfaces of the high-temperature thick steel plates.
  • the present invention relates in general to an apparatus for cooling high temperature metal plates, particularly steel plates of such thickness that they are called slabs.
  • the special characteristics of the high temperature metal plate cooling apparatus of the present invention are that it comprises a transmission unit consisting of endless conveyors provided rectangularly across the line of rolling high temperature metal plates as they are transmitted one after another in the rolling direction, a unit provided at the junction between said endless conveyors and the rolling or operation line, to load the high temperature metal plates crosswise onto said endless conveyors and a unit for jetting cooling water provided at an appropriate position near said endless conveyors.
  • the transmission system of skid type is found to have a fatal demerit of producing scars on the high temperature metal plates.
  • the with-chick chain conveyorsystem having constant spacing between chains makes ineffective and, therefore, uneconomical operations of cooling slabs having different breadths one from another.
  • endless conveyors for example, chain conveyors
  • chain conveyors are the most suited for such transmission system, which knowledge is incorporated-in the present invention.
  • An object of the present invention is to provide an efficient apparatus for cooling high temperature metal plates, of watercooling type but requiring no pressing means andto be set on the rolling line.
  • Another object of the present inventionisto provide an apparatus for cooling high temperature metalplates, whereby high temperature steel plates or slabs of more than 50mm thick immediately after rolled can be cooled in short time with water with nearly no production of such. deformations.
  • FIG. 1 shows a plane view of the apparatus for cooling high temperature metal plates according to the present invention.
  • FIG. 2 shows a side view of the apparatusshown in FIG. 1.
  • FIG. 3 shows the cross-sectional view ofthe apparatus along the line IIIIII in FIG. I.
  • FIG. 4 shows a plane view of the cooling water piping according to the present invention.
  • FIG. 5 shows the cross-sectional view of the nozzle pipe of the present invention.
  • FIG. 6 and FIG. 7 show respectively an embodiment of the apparatus of the present invention using another unit than shown in the above figures.
  • 1 indicates the roller table provided in the direction of the rolling or operation line; the high temperature metal plates 2 just after rolled are movedzon said roller table 1.
  • 3 indicates the pusher to push the high temperature metal plates 2 from the roller'table I to the direction rectangular across said roller table 1.
  • 6 indicates the endless conveyors provided in a plural number rectangularly. across the rolling direction. The high temperature metal plate 2 is loaded onto said endless conveyor 6 by the pusher 3.
  • an elevator 4 below one end of the transmission line of the endless conveyors; and the'top-surfaceof the elevator 4 is operated by the hydraulic press 5 to move down to the level of the upper surface of the endless conveyors 6.
  • each endless conveyor 6 constitutes the cooling zone 7, in which are provided a great number-of cooling water jetting pipes 8.
  • the support of said conveyors 10 on the side of the roller table for transmitting cooled metal plates is so designed as to move vertically, in order to have such plates transferred from said conveyors 10'to said roller table ll.
  • 12 indicates a motor for driving the endless conveyors 6.
  • 13 indicates a speed converter.
  • 14 indicates a motor for driving the conveyors 10.
  • I5 indicates a speed converter.
  • 16 indicates a hood for the suction of steam produced in cooling operations.
  • the apparatus of the present invention comprises a transmission unit consisting of endless conveyors 6 provided rectangularly across the rolling or operation line of nun-1 nan rolled high temperature metal plates 2, a unit for loading high temperature metal plates 2 onto the conveyors 6 provided near one end of the transmission line of said conveyors 6, and a cooling water jetting unit covering a greater part around the center of said conveyors 6.
  • Said conveyors are provided in several sets preferably in the pit as shown in FIGS.
  • the above-mentioned cooling water jetting unit makes it possible to cool high temperature metal plates 2 having a very long side, with nearly no production of warps, by the most effective adjustment of cooling water supply and arrangement of jetting nozzles, that is, by the shower onto the upper and bottom sides of high temperature metal plates 2 in an amount ranging from 0.1 to 0.6 m. /min. per m of each side, and by using nozzles 9 in a number of 8 to 40 pieces per m? of the surface of high temperature metal plates 2, these nozzles being sectioned into a number of blocks, say, four blocks in FIG. 4.
  • Each nozzle 9 is preferred to be sized about 0.05 to 0.30 cm. and provided as shown in FIG. the shower of cooling water onto the bottom surface is better to be from the same as to by about 50 percent greater than that onto the upper surface.
  • high temperature metal plate 2 stops once on the roller table 1, transferred by a pusher 3, a charging device 17 shown in FIG. 6, or the like for pushing or taking up the metal plate 2 to the elevator 4, and loaded onto the endless conveyors 6 with the elevator 4 as it is moved down by the rack or the hydraulic press 5; after loading, the pusher 3 returns to the original position 1' preparation for taking care of next metal plate 2.
  • a charging device 17 shown in FIG. 6, or the like for pushing or taking up the metal plate 2 to the elevator 4 as it is moved down by the rack or the hydraulic press 5; after loading, the pusher 3 returns to the original position 1' preparation for taking care of next metal plate 2.
  • high temperature metal plates 2 can be transferred directly onto the endless conveyors 6, making it possible to omit the elevator 4.
  • the metal plate 2 advances by its width and stops; and after transferring, the elevator 4 goes up in preparation for taking care of next metal plate 2. The same process is repeated for each metal plate 2.
  • the so cooled metal plates 2 are taken out one after another by the endless conveyors with clicks 10 provided at the end of the transmission line of the endless conveyors 6, and transported by the transporter 11 such as a roller table to the stock yard.
  • the transporter 11 such as a roller table to the stock yard.
  • a crow crane, magnet crane or extractor can be used instead of said endless conveyors for transportation 10.
  • the motor of general type for driving the conveyors 12 should be replaced by a stepless variable speed motor, otherwise a stepless converter should be used additionally.
  • the jetting pipes 8 should be sectioned into several blocks, each block having a flow adjusting valve 13 so as to adjust the supply of cooling water by taking into consideration the anticipated time for cooling according to the size of high temperature metal plates 2, the interval between each two of high temperature metal plates 2 and their physical properties, and, in some case, adjustment is necessary even among the so operated valves 13.
  • the endless conveyors 6 have a falling gradient of about H to about H50 in the cooling zone 7, and ets from the nozzles are directed toward the descending end of the conveyors, so that cooling water runs very smoothly on the surface of high temperature metal plates 2, preventing production of a cover of steam on the surface of high temperature metal plates 2 and resulting in an example of the reduction of cooling time by about 10 percent.
  • hood [4 and the upper jetting pipes it is difficult to inspect the maintenance of the apparatus; it is desirable to make them removable by setting them on the rail 15 or by using a rotary joint, so as to facilitate maintenance and inspection of the apparatus.
  • use of wavy guides 18 as shown in FIG. 7 on the upper surface of the endless conveyors smoothens flows of cooling water, making possible even cooling of high temperature metal plates 2. Thus, it becomes possible to cool high temperature metal plates 2 very economically.
  • An apparatus for cooling hot slabs comprising:
  • a transmission unit consisting of endless conveyors side by side adapted to be positioned adjacent to a slab rolling line and extending in a direction perpendicular to said rolling line and having a gradient falling away from the bend of said rolling line for conveying hot slabs in the direction of their width;
  • a jet cooling water unit provided around the endless conveyors for jetting cooling water toward hot slabs carried on said conveyors.
  • cooling water jetting unit includes from eight to 40 nozzles per m? of the surface of the to-be-cooled metal plate, each nozzle having a cross sectional area of from 0.05 to 0.30 cm. the nozzles being arranged in several block-shaped groups spaced along said conveyors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
US3464A 1969-01-20 1970-01-16 Apparatus for cooling high temperature metal plates Expired - Lifetime US3648996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP433869 1969-01-20

Publications (1)

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US3648996A true US3648996A (en) 1972-03-14

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US3464A Expired - Lifetime US3648996A (en) 1969-01-20 1970-01-16 Apparatus for cooling high temperature metal plates

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US (1) US3648996A (de)
CA (1) CA932566A (de)
DE (1) DE2002045C3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6017486A (en) * 1997-12-12 2000-01-25 Uss/Kobe Steel Company Comprehensive fume collection system for production of leaded steel
US6036914A (en) * 1997-12-12 2000-03-14 Uss/Kobe Steel Company Dumping bay with fume collecting provisions
US6077473A (en) * 1997-12-12 2000-06-20 Uss/Kobe Steel Company Torch cutting enclosure having fume collection provisions
EP1046436A2 (de) * 1999-04-20 2000-10-25 Sms Schloemann-Siemag Aktiengesellschaft Kühlverfahren für Walzgut und hiermit korrespondierendes Kühlbett
US11192159B2 (en) * 2018-06-13 2021-12-07 Novelis Inc. Systems and methods for quenching a metal strip after rolling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756498A (fr) * 1970-01-20 1971-03-01 Bwg Bergwerk Und Walzwerkmasch Dispositif de refroidissement de brames
US4132393A (en) * 1976-06-30 1979-01-02 Nippon Steel Corporation Apparatus for cooling hot steel plate and sheet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US486364A (en) * 1892-11-15 Cooling-bed for metal beams and rails
US567876A (en) * 1896-09-15 beard-more
US1962586A (en) * 1932-04-08 1934-06-12 Schloemann Ag Rolling mill
US3396564A (en) * 1965-11-29 1968-08-13 Bethlehem Steel Corp Apparatus for controlled cooling of metal stock
US3533261A (en) * 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US486364A (en) * 1892-11-15 Cooling-bed for metal beams and rails
US567876A (en) * 1896-09-15 beard-more
US1962586A (en) * 1932-04-08 1934-06-12 Schloemann Ag Rolling mill
US3396564A (en) * 1965-11-29 1968-08-13 Bethlehem Steel Corp Apparatus for controlled cooling of metal stock
US3533261A (en) * 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6017486A (en) * 1997-12-12 2000-01-25 Uss/Kobe Steel Company Comprehensive fume collection system for production of leaded steel
US6036914A (en) * 1997-12-12 2000-03-14 Uss/Kobe Steel Company Dumping bay with fume collecting provisions
US6077473A (en) * 1997-12-12 2000-06-20 Uss/Kobe Steel Company Torch cutting enclosure having fume collection provisions
EP1046436A2 (de) * 1999-04-20 2000-10-25 Sms Schloemann-Siemag Aktiengesellschaft Kühlverfahren für Walzgut und hiermit korrespondierendes Kühlbett
EP1046436A3 (de) * 1999-04-20 2003-12-17 Sms Schloemann-Siemag Aktiengesellschaft Kühlverfahren für Walzgut und hiermit korrespondierendes Kühlbett
US11192159B2 (en) * 2018-06-13 2021-12-07 Novelis Inc. Systems and methods for quenching a metal strip after rolling

Also Published As

Publication number Publication date
DE2002045C3 (de) 1978-10-26
DE2002045A1 (de) 1970-07-30
CA932566A (en) 1973-08-28
DE2002045B2 (de) 1978-02-09

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