Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
  • B22D11/1246—Nozzles; Spray heads

Definitions

• the invention relates to a strand guide segment for guiding and cooling the cast strand of a continuous casting installation, comprising a roller bridge formed with cross members and guide rollers between side walls, and a coolant supply for the secondary cooling of the cast strand and the frame cooling, these having a coolant distribution and distributor pipes, spray tubes and connectable thereto end spray nozzle are provided.
• the cross members between the side walls of a strand guide element are usually designed as solid cross members, and the spray slats for strand cooling are carried out from the rear of the segment through the roller bridge.
• Document EP 0 642 857 A2 describes a continuous casting installation, the strand guide segments of which are provided with spray elements, in particular spray battens, which are distributed over the variably adjustable width of the strand and are optionally divided into cooling zones and divided into cooling zones and connected to transverse distributor pipes.
• the outer spray battens arranged beyond the minimum strand width can be switched on or off depending on the respective strand width.
• the document US Pat. No. 4,220,192 describes a combined system of guide rollers and spray cooling for the strand for installation in the region of the open bottom of a vertically formed mold for continuous casting.
• the device has an elongated guide path which is flooded with water.
• the drainage of the water occurs through a number of sloping drains with terminal water spray nozzles, which are oriented so that they contain water Spray above and below the rollers and against the surface of the cooling device.
• Document EP 0 028 686 B1 describes an adjusting device for so-called spray bars running along the surface of a strand of a continuous casting installation as a carrier for spray tubes for a cooling medium directed onto the strand surface.
• the spray bars can be adjusted parallel to themselves at least in zones by means of a steering system. All the spray bars arranged on the four sides of the strand and extending along the surface of the strand are supported by at least two steering levers such that the spray bars move in the direction of the longitudinal axis of the strand when the distance changes.
• the steering levers of the side spray bars which are assigned to a strand surface, the center of which shifts with changing width of the strand surface, can be pivoted in inclined planes.
• the inclined planes form an acute angle with the spray plane running perpendicularly to the assigned strand surface through the spray tubes, such that the change in the distance of the spray bars results in a transverse displacement of the spray bars together with the spray tubes relative to the longitudinal axis of the strand.
• Document DE 30 39 443 A1 describes a device for adjusting nozzle pipes from the position for a narrow slab into a position corresponding to a wider slab by adjusting spindles, the base of the spray compartments being correspondingly enlarged by removing the spray nozzles from the surface of the strand.
• Document DE 197 02 718 C1 discloses a method and a device for controlling the cooling medium in the cooling section of a continuous casting installation, in which the nozzles of a cooling zone of the entire cooling section arranged on spray slats can be switched on and off in order to increase or reduce the quantity of cooling medium.
• Several spray battens become selective within one zone selected and combined into at least two spray groups and when the system pressure for the cooling medium falls below a specified value, the individual groups can be switched on and off alternately within a specified time interval.
• the invention has for its object to provide an improved, and in particular simplified design of a strand guide segment, in which only lines for water connections are to be switched on and off to adapt the spray nozzles to different widths of the cast strand, and as a result of the elimination of the water - Distributors and nozzle assemblies a very compact design is realized.
• Short injection units are also intended to achieve a high positional accuracy of the nozzles, additional frame cooling is to be dispensed with and good accessibility of the components after a breakthrough is to be achieved.
• the strand guide segment has water-conducting cross members with cross member areas which are coupled by vertical chambers in such a way that for the central area corresponding to the smallest strand width, or for a coolant supply is provided for the first outer region corresponding to the mean strand width, or for the second outer region corresponding to the maximum strand width.
• the invention has significant advantages due to a compact, uncomplicated design, namely: due to the elimination of water distribution and nozzle assemblies, due to the high positional accuracy of the nozzles due to short injection units, due to the absence of additional frame cooling, and because of particularly good accessibility of the components and especially the roller bearings after one Breakthrough. Further details, features and advantages of the invention result from the following explanation of an exemplary embodiment schematically shown in the drawing for a segment half in a spatial representation, seen from behind.
• the strand guide segment shown in the single FIG. 1 for guiding and cooling the cast strand of a continuous casting installation comprises one with cross members 1.1; 1.2; 1.3 roller bridge formed between side walls 51, 51 '.
• the segment has a loose and fixed side as well as assignable roller bearings 52 and guide rollers 50.
• a coolant supply 115, 125, 135 is provided for the secondary cooling of the cast strand and the frame cooling, these usually consisting of a water distribution and connecting pipes, spray pipes and ends connected to these Spray nozzles 6 there.
• the strand guide segment has juxtaposed, welded, water-conducting trusses 1.1; 1.2; 1.3 with truss areas 1.10; 1.20; 1.30 by vertical chambers 1.11; 1.12; 1.13 are coupled in the vertical direction from truss area to truss area in such a way that for the supply with splash water
• the trusses 1.1; 1.2; 1.3 consist of rectangular hollow sections welded together, these using internal communication means such as pipes or bores a number of crossbar areas 1.10; 1.20; Form 1.30, which can be switched on or off according to the current string width.
• Each truss 1.1; 1.2; 1.3 is provided on the top and on the bottom with weld-through blocks 2 through which water can flow, in each of which an injection unit 7 is inserted.
• An embodiment according to the invention provides that an injection unit 7 is formed with a screw connection 3, an adjoining pipe section 4 with a screw sleeve 5 and a terminal spray nozzle 6.
• a configuration of the injection unit 7 can also be provided, which consists of a welding element 8 such as a pipe section 9 or a molded part with a screw-on spray nozzle 6.
• a strand guide segment for guiding and cooling the cast strand of a continuous casting installation is clear, compact and can be optimally adapted to any strand width by switching on and off corresponding pressurized water supplies to the respective current strand width.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Continuous Casting (AREA)
• Fats And Perfumes (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 2001
  • 2001-02-01 DE DE10104348A patent/DE10104348A1/de not_active Withdrawn
• 2002
  • 2002-01-19 AT AT02715452T patent/ATE283743T1/de active
  • 2002-01-19 EP EP02715452A patent/EP1355752B1/fr not_active Expired - Lifetime
  • 2002-01-19 DE DE50201674T patent/DE50201674D1/de not_active Expired - Lifetime
  • 2002-01-19 WO PCT/EP2002/000490 patent/WO2002060619A1/fr not_active Ceased

Non-Patent Citations (1)

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