Slab Continuous Casting Segment Positioning and Locking Device and Assembly Method

Abstract

The invention belongs to metal continuous casting equipment, relates to a slab continuous casting fan-shaped segment locating and locking device and an assembling method, in particular to slab continuous casting machine auxiliary equipment. The device comprises a first fan-shaped segment, a second fan-shaped segment and a bearing mechanism. The fan-shaped segments are formed by connecting line rollers and roller frames. The first fan-shaped segment is fixed to the second fan-shaped segment. The first fan-shaped segment is connected with a lower opening of a crystallizer. Roller frame hooks are hung on bearing frame hanging pins. The device is characterized in that rectangular deep grooves of 8-12 mm are formed in the two sides below the right portion of each bearing frame, and locating and locking mechanisms with adjustable locking hole grooves are fixed in the rectangular grooves by fixing bolts; and brackets below the roller frames fall down to be inserted in the locking hole grooves, and zero clearance is kept during locking. The device has the beneficial effects that the concept is novel, the structure is simple, compact and reasonable, and running is stable and reliable; after online mounting and arc jointing, fast locating and locking are carried out, mounting and demounting are convenient, time is saved, and the fan-shaped segment arc jointing precision is improved and stabilized; and the casting blank quality is effectively improved, the accidents of blank stagnation and steel leakage are reduced, and it is guaranteed that continuous casting production is carried out smoothly.

Description

technical field [0001] The invention belongs to metal continuous casting equipment, in particular to an accessory equipment of a slab continuous casting machine. Background technique [0002] The slab continuous casting segment is an important equipment for supporting, guiding, bending and straightening the continuous casting slab, especially the segment 1 and 2 installed between the lower mouth of the continuous casting crystallizer and the horizontal segment. The most critical part of the slab from vertical to curved, where the slab temperature is high, the slab shell is thin, and the strength is low. Therefore, the segment structure is stable and the operation is reliable, which is very important to the quality of the slab and even the continuous casting production. [0003] At present, in the 2150 slab continuous casting machine designed by Germany's Siemens, the lower opening of the crystallizer is equipped with segment 1, segment 2, segment 3, etc. and their correspon...

AI Technical Summary

Problems solved by technology

[0004] The defect is that since the sector is positioned by its own weight, there is a 2-12mm installation gap between the corbel and the right wall of the connecting hole, and the dummy bar or billet will produce a gap to the right of the sector when the continuous casting machine draws steel. Thrust, when the thrust is greater than the self-weight positioning force of the segment, segment 1 and segment 2 will rotate around the bearing frame hanging shaft to the right, causing displacement of segment 1 and segment 2, resulting in the sector There is a large deviation in the arc connection accuracy between the section rolls and the foot rolls of the crystallizer, and after the second section of the fan section. When the slab passes through the rolls, the slab is squeezed, and the slab will generate large mechanical stress, which seriously affects the casting. Billet quality; when the force on the second segment of the fan-shaped section is too large, since the bolt holes for fixing the connecting plate adopt horizontal waist-shaped holes, the left side of the connecting hole groove squeezes towards the pin shaft on the connecting plate. When the bolts of the load-bearing frame clamp the friction force, the connecting plate moves to the right, causing serious deviations in arc contact between the first and second segments of the sector, the foot rolls of the crystallizer, and the subsequent row rolls, which is prone to "sluggish billet" , or a "breakout" accident in which the shell of the slab is squeezed, which seriously affects the continuous casting production; frequent maintenance, difficult control of the arc connection accuracy of the fan section, inconvenient installation and disassembly, and long operating hours affect production

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