US3420447A - Distributor for distributing cooling liquid - Google Patents

Distributor for distributing cooling liquid Download PDF

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Publication number
US3420447A
US3420447A US547967A US3420447DA US3420447A US 3420447 A US3420447 A US 3420447A US 547967 A US547967 A US 547967A US 3420447D A US3420447D A US 3420447DA US 3420447 A US3420447 A US 3420447A
Authority
US
United States
Prior art keywords
header
pipe
distributor
cooling liquid
strip
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
US547967A
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English (en)
Inventor
David Robert Howard
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.)
Davy Loewy Ltd
Original Assignee
Davy Loewy Ltd
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 Davy Loewy Ltd filed Critical Davy Loewy Ltd
Application granted granted Critical
Publication of US3420447A publication Critical patent/US3420447A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

  • the disclosure of this invention relates to a fluid cooling system of the type used to cool hot strip as it leaves the last stand of the finishing train.
  • the disclosure includes a header into which a controllable supply of fluid is introduced.
  • a plurality of delivery pipes mounted so that they extend in a vertical direction with their lower ends above the strip which passes beneath the pipes.
  • Within each pipe there is provided a series of streamlining sections.
  • Each pipe with respect to its upper ends, terminates in a chamber dis posed above the header in which the chamber communicates with the header through restricted passages.
  • This invention relates to cooling systems for cooling strip material, for example strip metal emerging from a stand of a rolling mill. It has previously been suggested to deliver cooling water or other liquid onto the horizontally moving strip in the form of low-velocity, unbroken jets, utilising syphon tubes connected to open tanks arranged above the strip path. With this arrangement, however, the rate of delivery of liquid from each tube can be adjusted only by adjustment of the level of water in the tank.
  • a cooling system comprising a closed header transversely disposed over the strip to be cooled and connected to a supply of cooling liquid, and a series of delivery pipes spaced along the header, each being connected to the header at or adjacent the top thereof and, after extending above the level of the header, terminating above the strip so as to deliver the cooling liquid onto the moving strip in an unbroken, low velocity, jet.
  • each delivery pipe extends upwardly from the header in a circular arc and terminates in a straight downwardly extending part.
  • Each pipe is connected through a restriction to the interior of the header, so that the flow through the pipes is equalised.
  • a cooling system comprises a header connected to a controllable supply of liquid coolant and a plurality of delivery pipes connected to or in the header, each such pipe communicating with the interior of the header via a restricted passage and having means for promoting streamline flow therewithin, prior to discharge from the pipe.
  • the flow through the restriction gives rise to turbulence within the pipe; in order that the liquid reaching the moving strip should have laminar, or near laminar, flow the liquid leaving each discharge pipe should contain as little turbulence as possible and the means for promoting streamlined flow is designed to that end.
  • each pipe may be substantially straight and may be arranged substantially vertically, passing through the header wall.
  • FIGURE 1 diagrammatically indicates a header and one of the delivery pipes of that header
  • FIGURE 2 is an axial section of one of the delivery pipes
  • FIGURE 3 is an axial section of a modification.
  • FIGURE 1 illustrates several in line headers 12, 12', each of which is connected to a supply of water under pressure through a valve.
  • Each header extends over the entire width of the strip path and is mounted with its axis horizontal and transversely disposed with respect to the strip path by means not shown.
  • One end of the header is connected to a Water supply pipe which has a valve controlling the supply flow rate.
  • a series of delivery pipes 13 is connected to the header at intervals along the length of the header. As shown, each pipe 13 is arranged vertically and on the vertical diameter through the header 12; each pipe terminates with its upper end above the horizontal diameter of the header.
  • each delivery pipe 13 is formed with a cylindrical outer wall 14, integral with a restriction 15- formed at the upper end of the pipe, when arranged in the header as shown in FIGURE 1.
  • a restriction 15- formed at the upper end of the pipe, when arranged in the header as shown in FIGURE 1.
  • the restriction 15 there is a short dispersion zone 16- leading to streamlining means 17 which extend over the larger part of the length of the pipe 13.
  • the streamlining means 17 consist of a group of tubes, each having a diameter small compared with that of the pipe 13 and each arranged with its axis parallel to the axis of the pipe.
  • other forms of streamlining means may be provided, such as a series of fins.
  • a convergent nozzle 18 Following the streamlining means 17 and arranged at the exit end of the pipe 13 is a convergent nozzle 18, in which the water passing through the individual passages of the streamlining means is collected, and which discharges the water from the pipe in a slightly convergent stream.
  • the header 12 is arranged so that the lower extremities of the pipes 13 are at such a distance above strip to be cooled that the jet remains unbroken during its fall and before it strikes the strip.
  • the nozzles 18 may be arranged 5 feet above the mean path of the strip, when the flow will be laminar, provided that the flow rate is 5 gallons per minute or less and provided the diameter of the jet near the strip is not more than 0.3 inch. It will be appreciated that these values are those for true laminar flow, where the Reynolds number does not exceed 2,000. Flow resembling laminar flow and effective for cooling the strip efficiently may be obtained with values greater than those given.
  • each pipe 13 may be of 1 inch diameter and of 6 inches in length.
  • the streamlining section 17 may comprise tubes of inch internal diameter and 4 inches in length.
  • the exit diameter of the nozzle 18 may be inch.
  • the header is again shown at 12 and one of the series of delivery pipes at 13.
  • the delivery pipe 13 passes upwards through the top wall 12A of the header 12 and terminates in an open end a short distance above that wall.
  • the upwardly protruding portion of pipe 13 is enclosed within a hemispherical dome 20 bolted to the wall 12A and spaced away from the upper extremity of the pipe.
  • a number of holes 21, for example four, are formed in the wall 12A and these holes form restrictions through which water may pass from the header 12 to the interior of the dome 20' and thence to the pipe 13, without causing undue pressure drop in the header.
  • the pipe 13 contains, as before, a streamlining section shown as constituted by small diameter tubes 17, and the streamlining section is followed by a collecting zone 22 preceding a convergent section 23.
  • the turbulence generated by the passage through the holes 21 is smoothed during the passage of the water in the interior dome 20, as well as during passage through the streamlining section.
  • each of the four holes 21 is diameter, equispaced on a 2 /2 diameter circle.
  • the header 12 is 4 x 4 hollow section, while the streamlining section is again 4" long and formed by tubes of A bore.
  • the exit diameter of the pipe 13 is Ms.
  • the dome 20 is formed with a dimple at its top as seen from outside the dome.
  • the dimple extends inwardly to just beloW the level of the top of the pipe 13. This formation of the dome promotes smooth flow into the pipe.
  • a distributor for distributing cooling liquid comprising:
  • a header tank arranged to receive cooling liquid under pressure
  • each pipe located below the tank and the other end of each pipe positioned above the tank;
  • each delivery a plurality of cover members mounted on a wall of the header tank and each defining a chamber above the header tank into which the upper end of at least one of said delivery pipes extends, and with a plurality of restricted passages through said wall interconnecting the header tank with the chamber.
  • a distributor for distributing cooling liquid according to claim 1 wherein the said means for promoting streamline flow comprises a group of tubes or fins whose longitudinal axes are parallel to the associated said pipe.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Nozzles (AREA)
US547967A 1965-04-22 1966-05-02 Distributor for distributing cooling liquid Expired - Lifetime US3420447A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB32037/65A GB1148171A (en) 1965-04-22 1965-04-22 Cooling system
GB3203765 1965-07-27
US54796766A 1966-05-02 1966-05-02

Publications (1)

Publication Number Publication Date
US3420447A true US3420447A (en) 1969-01-07

Family

ID=27257438

Family Applications (1)

Application Number Title Priority Date Filing Date
US547967A Expired - Lifetime US3420447A (en) 1965-04-22 1966-05-02 Distributor for distributing cooling liquid

Country Status (4)

Country Link
US (1) US3420447A (de)
DE (1) DE1501372B2 (de)
GB (1) GB1148171A (de)
NL (1) NL6605396A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2804982A1 (de) * 1977-02-07 1978-08-10 Davy Loewy Ltd Anordnung zum zufuehren eines kohaerenten kuehlfluessigkeits-vorhanges
US5234161A (en) * 1992-05-08 1993-08-10 Baltimore Aircoil Company Counterflow spray nozzle
US5779099A (en) * 1996-06-28 1998-07-14 D'andrade; Bruce M. Nozzle with turbulence control member for water gun laminar flow ejection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215248A1 (de) * 1982-04-23 1983-10-27 Mannesmann AG, 4000 Düsseldorf Wasser-kuehlvorrichtung fuer bleche und baender
DE102013221710A1 (de) 2013-10-25 2015-04-30 Sms Siemag Aktiengesellschaft Aluminium-Warmbandwalzstraße und Verfahren zum Warmwalzen eines Aluminium-Warmbandes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408588A (en) * 1940-09-20 1946-10-01 British Oxygen Co Ltd Apparatus for dividing or desurfacing metal by use of oxidizing sets
US3263933A (en) * 1964-07-29 1966-08-02 Michigan Oven Co Duct systems
US3268176A (en) * 1964-08-07 1966-08-23 Spraying Systems Co Spray nozzle having stabilizing tube and vane unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408588A (en) * 1940-09-20 1946-10-01 British Oxygen Co Ltd Apparatus for dividing or desurfacing metal by use of oxidizing sets
US3263933A (en) * 1964-07-29 1966-08-02 Michigan Oven Co Duct systems
US3268176A (en) * 1964-08-07 1966-08-23 Spraying Systems Co Spray nozzle having stabilizing tube and vane unit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2804982A1 (de) * 1977-02-07 1978-08-10 Davy Loewy Ltd Anordnung zum zufuehren eines kohaerenten kuehlfluessigkeits-vorhanges
FR2379779A1 (fr) * 1977-02-07 1978-09-01 Davy Loewy Ltd Appareil emetteur de liquide de refroidissement
US4210288A (en) * 1977-02-07 1980-07-01 Davy-Loewy Limited Cooling apparatus
US5234161A (en) * 1992-05-08 1993-08-10 Baltimore Aircoil Company Counterflow spray nozzle
US5779099A (en) * 1996-06-28 1998-07-14 D'andrade; Bruce M. Nozzle with turbulence control member for water gun laminar flow ejection

Also Published As

Publication number Publication date
DE1501372A1 (de) 1969-10-30
NL6605396A (de) 1966-10-24
GB1148171A (en) 1969-04-10
DE1501372B2 (de) 1976-10-21

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