EP0064771A2 - Pressurised cooling pipe for the direct intensive cooling of rolling mill products - Google Patents

Pressurised cooling pipe for the direct intensive cooling of rolling mill products Download PDF

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Publication number
EP0064771A2
EP0064771A2 EP82104193A EP82104193A EP0064771A2 EP 0064771 A2 EP0064771 A2 EP 0064771A2 EP 82104193 A EP82104193 A EP 82104193A EP 82104193 A EP82104193 A EP 82104193A EP 0064771 A2 EP0064771 A2 EP 0064771A2
Authority
EP
European Patent Office
Prior art keywords
cooling
cooling tube
rolling
pressure cooling
nozzle heads
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.)
Granted
Application number
EP82104193A
Other languages
German (de)
French (fr)
Other versions
EP0064771B1 (en
EP0064771A3 (en
Inventor
Franz Tamm
Günther Friese
Siegbert Arndt
Hartmut Blank
Bernhard Höricke
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.)
HENNIGSDORFER STAHL GMBH TE HENNIGSDORF, BONDSREPU
Original Assignee
VEB Stahl- und Walzwerk "Wilhelm Florin" Hennigsdorf
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
Priority to DD229902 priority Critical
Priority to DD22990281 priority
Application filed by VEB Stahl- und Walzwerk "Wilhelm Florin" Hennigsdorf filed Critical VEB Stahl- und Walzwerk "Wilhelm Florin" Hennigsdorf
Publication of EP0064771A2 publication Critical patent/EP0064771A2/en
Publication of EP0064771A3 publication Critical patent/EP0064771A3/en
Application granted granted Critical
Publication of EP0064771B1 publication Critical patent/EP0064771B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices 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
    • B21B45/0203Cooling
    • B21B45/0209Cooling devices, e.g. using gaseous coolants
    • B21B45/0215Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0224Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars

Abstract

1. Pressure cooling tube for direct intensive cooling of rolling product to remove the heat of rolling, the cooling water being supplied in the same flow direction as the rolling product to be cooled via nozzle heads (1, 2) and being guided away via a collection chamber (5) and deflection chambers (6) which have guide funnels (8), characterised in that the deflection chambers (6) are arranged following the collection chamber (5) and are arranged before the guide funnels (8) closely above the guide plates (7) upwardly closing the roll passage, inlets (9) for a fluid and/or gaseous stripping medium discharging into the guide plates (7).

Description

  • The invention relates to a pressure cooling tube for the direct intensive cooling of rolling stock from the rolling heat, the cooling water being fed in via nozzle heads and being partially discharged via a storage chamber.
  • Such cooling pipes are particularly suitable for cooling fine steel and wire from the rolling heat at high rolling speeds.
  • Two types of cooling tubes have proven themselves in practice for direct intensive cooling from the rolling heat. The co-countercurrent cooling tube, in which the pressurized water is fed to the ends of the cooling tube and discharged in the middle via a storage chamber, is suitable for larger rolling dimensions and low rolling speeds, but for thin rolling dimensions and high rolling speeds it is due to the counterflow component, which has considerable braking forces on the Roll wire brings, not applicable, because the roll wires buckle.
  • The countercurrent cooling tube offers undisputed advantages when cooling thin roll dimensions with high rolling speeds, but in the known solutions the discharge of the pressurized water is inadequate, so that with the previously used direct current pipes the practically achievable rolling speeds are limited, which are below the values achieved in normal operation without a cooling system . Pressurized water, which emerges at the end of the cooling pipe in the rolling line, leads to a braking effect on the wire in all cases, regardless of whether the escaping water builds up in front of the subsequent cooling pipe or on End of the cooling section loses speed. In addition, this water emerging at the ends of the cooling tube leads to undefined cooling, which reduces the quality of the cooled material. In order to counter the leakage of the cooling water at the end of the DC cooling tubes, stowage chambers at the end of the cooling tube are known, which are followed by a short piece of countercurrent cooling, which in the most favorable case only consists of an opposing head which is only supplied with so much cooling water that the water can escape the cooling pipe end is just prevented. With these measures, however, braking forces are already so high that buckling of thin rolling cores occurs at high rolling speeds.
  • In order to achieve a maximum throughput and thus an increase in the speed of the cooling medium, 2 nozzle heads are arranged one behind the other according to DD-WP 147 506. In this way it is possible to achieve both intensive cooling and a good blowing effect. However, since the nozzles partially influence each other, undesirable transverse and braking forces still act mainly on the wire rod tip.
  • The invention has for its object to develop a cooling tube with which thin rolling stock dimensions, such as steel bars and wire, are intensively cooled at high rolling speeds, and in which both the improved inflow conditions of the cooling medium on the inlet side and a water deflection system on the outlet side the transverse or counter forces acting on the rolling core are kept extremely low.
  • According to the invention, this object is achieved in that deflection chambers are arranged downstream of the storage chamber, which have guide funnels, on the one hand to guide the rolling wire and on the other hand to allow the cooling medium to be deflected. To support the deflection process, leading baffles are arranged in front of these guide funnels close above the roller core. In the lead Sheets open supply lines for a liquid and / or gaseous stripping medium.
  • Another feature of the invention is that at least two nozzle heads are arranged one behind the other, the nozzle bores of the nozzle heads arranged in different feed planes lying on partial circles of different diameters and that the nozzle bores in the different feed planes are at an angle of 30 ° to 0 ° to one another.
  • In a further embodiment of the invention it is provided that an adjustable guide tube protruding into the nozzle heads is arranged at the inlet of the pressure cooling tube. In this context, it is also expedient that a flow funnel is arranged between the nozzle head and the pressure cooling tube.
  • Due to the design of the feed according to the invention, the coolant flows do not influence one another; a maximum throughput quantity and thus an increase in the speed of the cooling medium are achieved. On the outlet side of the pressure cooling tube it is achieved that the cooling medium escaping at high speed is deflected very quickly out of the rolling line in order to prevent it from reaching downstream facilities and exerting a braking effect on the rolling core.
  • The invention will be explained in more detail below using an exemplary embodiment.
  • Fig. 1 shows a cross section through the pressure cooling tube according to the invention.
  • The nozzle heads 1 and 2 are located in two different feed levels and have nozzle bores 4 which lie on partial circles of different diameters. The nozzle bores 4 in the two feed levels can form an angle of 30 ° to 0 ° to one another.
  • Downstream of the nozzle heads 1 and 2 is a flow funnel 13 which has an inlet that is favorable in terms of flow of the cooling medium. The guide tube 12 passing through the nozzle heads 1 and 2 and projecting into the flow funnel 13 brings about an improved roll-in inlet as a result of a reduction in the transverse forces of the cooling medium acting on the roll-out. In a known manner, part of the cooling medium flows into the prechamber 11 via a storage chamber 5 and a return flow pipe 10 in order to prevent air intake at the inlet of the pressure cooling pipe 3.
  • In order to achieve good quality cooling using the direct current principle and in order not to impede the passage of the roller through the pressure cooling tube 3 as a result of the counterforces occurring in an arrangement of known counter-nozzles, the cooling medium is deflected out of the cooling line in the shortest possible way by the deflection chambers 6 arranged downstream of the accumulation chamber 5. without significant forces acting on the roll core. In front of the guide funnels 8 of the deflection chambers 6, closing baffles 7 are arranged at the top, so that the remaining cooling medium is prevented from escaping upwards and can exit openly at the bottom. A liquid and / or gaseous stripping medium is introduced from above via feed lines 9 opening into the guide plates 7, as a result of which the downward deflection of the cooling medium is increased.
  • It is advantageous to apply a gaseous medium to the deflection chambers 6 if value is placed on the lowest transverse forces when cooling thin rolling stock dimensions at high temperatures at high rolling speeds. Economic considerations can result in the deflection chambers 6 being exposed to a liquid medium in less sensitive rolling conditions.

Claims (4)

1. Pressure cooling tube for direct intensive cooling of rolling stock from the rolling heat, the cooling water being fed in via nozzle heads and partially discharged via a storage chamber, characterized in that deflection chambers (6) are provided behind the storage chamber (5) and have the guide funnels (8) , In front of these guide funnels (8) closing baffles (7) are arranged, leading into the feed lines (9) for a liquid and / or gaseous stripping medium.
2. Pressure cooling tube according to claim 1, characterized in that at least two nozzle heads (1; 2) are arranged one behind the other, the nozzle bores (4) of the nozzle heads arranged in different feed levels (1; 2) lying on partial circles of different diameters and in that the nozzle bores ( 4) at an angle of 30 ° to 0 ° to each other in the different feed levels.
3. Pressure cooling tube according to claim 1 and 2, characterized in that at the inlet of the pressure cooling tube (3) in the nozzle heads (1; 2) projecting adjustable guide tube (12) is arranged.
4. Pressure cooling tube according to claim 1 to 3, characterized in that a flow funnel (13) is arranged between the nozzle head (2) and the pressure cooling tube (3).
EP82104193A 1981-05-13 1982-05-13 Pressurised cooling pipe for the direct intensive cooling of rolling mill products Expired EP0064771B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DD229902 1981-05-13
DD22990281 1981-05-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT82104193T AT15615T (en) 1981-05-13 1982-05-13 Pressure cooling pipe for direct intensive cooling of rolled goods.

Publications (3)

Publication Number Publication Date
EP0064771A2 true EP0064771A2 (en) 1982-11-17
EP0064771A3 EP0064771A3 (en) 1983-03-16
EP0064771B1 EP0064771B1 (en) 1985-09-18

Family

ID=5530879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104193A Expired EP0064771B1 (en) 1981-05-13 1982-05-13 Pressurised cooling pipe for the direct intensive cooling of rolling mill products

Country Status (3)

Country Link
EP (1) EP0064771B1 (en)
AT (1) AT15615T (en)
DE (1) DE3266328D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287503A2 (en) * 1987-03-13 1988-10-19 Walter Dipl.-Ing. Krenn Method of and pressure cooling apparatus for cooling a continuous product
DE3837302A1 (en) * 1988-06-16 1989-12-21 Florin Stahl Walzwerk COOLING TUBE FOR ROLLING Veins
DE4444106C1 (en) * 1994-12-10 1996-02-29 Hennigsdorfer Stahl Engineerin Pressurised water drain for pressure condenser pipe
DE19718530A1 (en) * 1997-05-02 1998-11-12 Schloemann Siemag Ag Process and cooling unit for cooling hot rolled rolling stock, in particular hot wide strip

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044098A (en) * 1959-06-02 1962-07-17 United States Steel Corp Apparatus for cleaning wire rod
DE2121712A1 (en) * 1970-06-05 1971-12-09 Thaelmann Schwermaschbau Veb Means for kuehlen of rod steel
DE1777343A1 (en) * 1967-02-08 1972-08-31 Schloemann Ag Means for removing Kuehlwasser in a Wasserkuehleinrichtung for high-speed wire rod
FR2267165A1 (en) * 1974-04-10 1975-11-07 Florin Stahl Walzwerk
DE2556383A1 (en) * 1975-03-26 1976-10-07 Thaelmann Schwermaschbau Veb Cooling hot steel rod leaving a rolling mill - where cooling water flows in the same and opposite directions to the rod
EP0013230A1 (en) * 1978-12-26 1980-07-09 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Device for removing a fluid from the surface of a long and continuously moving product
DD147506A1 (en) * 1979-11-29 1981-04-08 Bernhard Hoericke Cooling tube for the direct cooling of warm, preferably rolling material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044098A (en) * 1959-06-02 1962-07-17 United States Steel Corp Apparatus for cleaning wire rod
DE1777343A1 (en) * 1967-02-08 1972-08-31 Schloemann Ag Means for removing Kuehlwasser in a Wasserkuehleinrichtung for high-speed wire rod
DE2121712A1 (en) * 1970-06-05 1971-12-09 Thaelmann Schwermaschbau Veb Means for kuehlen of rod steel
FR2267165A1 (en) * 1974-04-10 1975-11-07 Florin Stahl Walzwerk
DE2556383A1 (en) * 1975-03-26 1976-10-07 Thaelmann Schwermaschbau Veb Cooling hot steel rod leaving a rolling mill - where cooling water flows in the same and opposite directions to the rod
EP0013230A1 (en) * 1978-12-26 1980-07-09 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Device for removing a fluid from the surface of a long and continuously moving product
DD147506A1 (en) * 1979-11-29 1981-04-08 Bernhard Hoericke Cooling tube for the direct cooling of warm, preferably rolling material

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0287503A2 (en) * 1987-03-13 1988-10-19 Walter Dipl.-Ing. Krenn Method of and pressure cooling apparatus for cooling a continuous product
EP0287503A3 (en) * 1987-03-13 1989-02-08 Korf Engineering Gmbh Method of and pressure cooling apparatus for cooling a continuous product
DE3837302A1 (en) * 1988-06-16 1989-12-21 Florin Stahl Walzwerk COOLING TUBE FOR ROLLING Veins
DE4444106C1 (en) * 1994-12-10 1996-02-29 Hennigsdorfer Stahl Engineerin Pressurised water drain for pressure condenser pipe
WO1996018467A1 (en) * 1994-12-10 1996-06-20 Hennigsdorfer Stahl Engineering Gmbh Device for pressurised water discharge pipe
US5873949A (en) * 1994-12-10 1999-02-23 Hennigsdorfer Stahl Engineering Gmbh Device for pressurized water discharge pipe
DE19718530A1 (en) * 1997-05-02 1998-11-12 Schloemann Siemag Ag Process and cooling unit for cooling hot rolled rolling stock, in particular hot wide strip
DE19718530B4 (en) * 1997-05-02 2005-02-03 Sms Demag Ag Process for cooling of rolling-cold rolling stock and apparatus for carrying out the method and use of the apparatus

Also Published As

Publication number Publication date
AT15615T (en) 1985-10-15
EP0064771B1 (en) 1985-09-18
DE3266328D1 (en) 1985-10-24
EP0064771A3 (en) 1983-03-16

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