DE102006014459A1 - Device for supporting a casting strand below a casting mold comprises only horizontal guiding surfaces lying on the casting strand - Google Patents

Abstract

Device for supporting a casting strand below a casting mold comprises only horizontal guiding surfaces lying on the casting strand.

Description

The The invention relates to a device for supporting / supporting a cast strand below a casting mold, comprising at least one support frame with horizontal and vertical webs, these being several lattice windows form and arranged in each lattice window at least one nozzle is.

From the publication DE 22 48 496 A method is known for cooling steel cast in an oscillatable continuous casting mold, wherein a strand crust is formed in a first part of the mold by indirect cooling, and in a second part the moving strand crust is exposed to direct impingement by sprayed water and further cooled. In this case, the strand crust is guided in strand direction before and after each Sprühfächer by adjacent to the strand, essentially freed of water spray supporting surfaces and the water spray away from the strand to the rear outside of the next in the direction of spray Sprühfächers derived. The device for carrying out this method provides that support bodies are arranged before and after each spray nozzle, whose support surfaces are adapted to the geometry of the strand surface, and that project the rear edges of the downstream support body over the underlying spray nozzles.

Furthermore, the prior art include support grid according to the 1 and 2 , Such designs are currently installed by the applicant in the corresponding devices.

at the well-known CSP - continuous casters becomes the cast strand below the mold by a support grid with horizontal guide webs and vertical guide webs supported. The support grid exists preferably from a support grid frame and several screw-on wear grid plates. The grid openings have an aspect ratio of 1: 1 to 1: 2 (vertical to horizontal). The dimensions of the grid openings For example, be about 100 mm × 100 mm to 100 mm × 200 mm.

The Advantages of the known support grid consist in that the cast strand flat is supported and intensive cooling receives. The planar support / support and the intensive cooling are especially at high casting speeds For example, 4 m / min to 8 m / min for the casting security makes sense.

Farther is the support grid after a cast strand breakthrough easy and quick to repair.

disadvantage the known support grid are the vertical guide bars, in this area a uniform cooling of the strand surface over the casting width affect.

Of the Invention is based on the object, an improved device for supporting / supporting a cast strand specify, in addition to the Areas of the cast strand surface that from the vertical guide webs be covered by the coolant be achieved and thus a uniform cooling of the strand surface over the entire casting width is reached. Furthermore, the life of the device to be increased and the Manufacturing costs are lowered.

These Task is inventively characterized solved, that in a device according to the preamble of claim 1 only horizontal guide webs the surface of the cast strand support or support. As a result, a uniform cooling of the Casting over the ensured overall width, thereby further improving the surface quality becomes.

Further Embodiments of the device will be apparent from the relevant Dependent claims.

According to one Further development of the invention is the clear vertical distance the horizontal guide bars, compared to the known device, reduced. An inadmissible or undesirable Bulging of the strand shell is avoided.

One decisive advantage of the device according to the invention is still in that by the smaller clear vertical distance the horizontal guide bars a flat, rectangular Lattice window is formed, that the use of flat jet nozzles for intensive, near-surface cooling possible.

One embodiment The invention will be described with reference to very schematic drawings. Show it:

1 in a spatial representation of a device according to the prior art,

2 in a sectional side view of a known support segment,

3 in front view of an inventive support segment and

4 in sectional side view of a support segment after 3 ,

In 1 is a support segment in spatial representation 1 according to the prior art posed. Each support segment 1 consists of a support frame 12 and a wear grid 16 , The support frame 12 is made of horizontal webs 2 and vertical bars 3 , Here are the horizontal and vertical webs 2 . 3 and the grid windows attached to it 4 , In every grid window 4 is at least one nozzle (not shown) for cooling the Gießstrangoberfläche 5 arranged.

With the support frame 12 is, for example by screwing, a wear grid 16 , consisting of horizontal wear strips 2 ' and vertical wear strips 3 ' connected. In the embodiment shown is the wear grid 16 formed in one piece. Alternatively, there is the possibility of the wear grid 16 to form multiple parts or the horizontal wear strips 2 ' and the vertical wear strips 3 ' to be manufactured and fastened separately.

The support segment 1 For example, points to the side flanges 6 fasteners 7 on, with which the support segment 1 is releasably secured in a strand guide segment.

2 shows in sectional side view of a support segment 1 , The horizontal wear strips 2 ' and the vertical wear strips 3 ' lie directly on the cast strand surface 5 with the vertical and horizontal guide surfaces 10 . 11 at. The horizontal bars 2 are tilted to the bottom right, so that the cooling medium, which consists of nozzles 8th on the surface of the cast strand 9 sprayed, can drain more easily. This ensures a steady heat dissipation. The horizontal and vertical bars 2 . 3 are on a frame 12 attached. The horizontal and vertical bars 2 . 3 form with the side flanges 6 the support frame 12 ,

A support segment 1 according to the invention is in front view in 3 and on average in 4 dargstellt. The horizontal bars 2 are with multiple, juxtaposed guide rails 13 Mistake. These are in a first embodiment on the horizontal webs 2 screwed. Per support segment 1 is at least one horizontal jetty 2 provided, in 3 and 4 are three horizontal bars 2 realized. The vertical bars 3 lie in a version with screwed on guide rails 13 in a plane like the horizontal bars 2 , If a one-piece version of the support grid is selected, the vertical bars lie 3 by at least 5 mm, preferably 20 mm, back (return 15 ).

By such embodiments, the cast strand 9 only by horizontal guide surfaces 11 supported / supported and that from nozzles 8th sprayed cooling medium can the Gießstrangoberfläche 5 apply over the entire width. The clear vertical distance 14 from two neighboring bridges 2 according to the invention is less than the clear distance according to the prior art.

As in 4 is shown, are the horizontal webs 2 inclined to discharge the cooling medium. The guide rails 13 indicate the casting strand surface 5 facing horizontal guide surface 11 Chamfers and / or radii on to the cast strand surface 5 not to damage.

In another embodiment, the horizontal bars 2 and the guide rails 13 formed in one piece. In such an embodiment, the vertical webs would 3 with a return 15 executed.

1

supporting segment

2

horizontal web

2 '

horizontal wear strip

3

vertical web

3 '

vertical wear strip

4

lattice window

5

Gießstrangoberfläche

6

side flange

7

fastener

8th

jet

9

cast strand

10

vertical guide surface

11

horizontal guide surface

12

support frame

13

guide rail

14

vertical distance

15

return

16

lights distance

Claims (13)

Device for supporting / supporting a cast strand below a casting mold, comprising at least one support frame ( 12 ) with horizontal and vertical guide webs ( 2 . 3 ) where these multiple lattice windows ( 4 ) and in each grid window ( 4 ) at least one nozzle ( 8th ), characterized in that only horizontal guide surfaces ( 11 ) on the cast strand ( 9 ) are formed adjacent. Apparatus according to claim 1, characterized in that the horizontal guide surfaces ( 11 ) preferably with guide rails ( 13 ) are formed. Apparatus according to claim 2, characterized in that at least one guide strip ( 13 ) per horizontal bridge ( 2 ) is available. Apparatus according to claim 2 or 3, characterized in that the length of the attached guide rails ( 13 ) is greater than 100 mm and less than 400 mm. Apparatus according to claim 2, 3 or 4, characterized in that the height of the horizontal guide rails ( 13 ) is between 10 mm and 35 mm. Apparatus according to claim 1, characterized in that the number of horizontal webs ( 2 ) is greater than one and less than eight, preferably four. Device according to one of claims 1 to 6, characterized in that the vertical distance ( 14 ) of two horizontal webs ( 2 ) is between 30 mm to 80 mm. Device according to one of claims 1 to 7, characterized in that the support frame ( 12 ) and the horizontal guide rails ( 13 ) is made in one piece. Device according to one of claims 1 to 8, characterized in that the return ( 15 ) of the vertical webs ( 3 ) in relation to the horizontal guide surfaces ( 11 ) is at least 5 mm, preferably 20 mm. Device according to one of claims 1 to 8, characterized in that the return ( 15 ) of the vertical webs ( 3 ) is greater than or equal to half the width of the vertical webs ( 3 ). Apparatus according to claim 1, characterized in that in each lattice window ( 4 ) A flat jet nozzle is arranged. Device according to one of claims 1 to 11, characterized in that the clear distance ( 16 ) of the vertical webs ( 3 ) as part of ( 12 ) at least n × the spray width of the flat steel nozzle ( 8th ) corresponds to n = 1, 2, 3 etc. Device according to one of claims 1 to 12, characterized in that the vertical webs ( 3 ) are offset from the injection plane to the injection plane preferably by half the spray width.