CN201284357Y

CN201284357Y - Stacking rack for cover-type annealing furnace

Info

Publication number: CN201284357Y
Application number: CNU2008201545871U
Authority: CN
Inventors: 倪国华
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd; Jiangsu Gangyang Co Ltd
Priority date: 2008-10-29
Filing date: 2008-10-29
Publication date: 2009-08-05
Anticipated expiration: 2018-10-29

Abstract

The utility model is applicable to a stacking stand of a bell type annealing furnace, comprising a body which is of a cylindrical frame structure and is respectively provided with an opening at the upper end and the lower end, and a plurality of convection plates which are of a sector structure; one end of the convection plate takes the body as a center and is arranged at the upper end surface of the body in a circumferential mode; besides, the convection plates are arranged at one end of the center of the body to form a porous channel for supplying air convection. Under the premise that the devices of a furnace platform and an aligning device of steel coils are not changed and the safety is ensured, the stacking stand reduces the problem that the lower layer of steel coils in the traditional annealing device is easy to be pressed longitudinally and reduces the occurrence probability of bonding and longitudinal folding of the lower layer of steel coils.

Description

A kind of stacking rack that is suitable for bell type annealing furnace

Technical field

The utility model relates to annealing device, particularly a kind of stacking rack that is suitable for bell type annealing furnace.

Background technology

Bell type annealing furnace was in annealing process in the past, and coil of strip is separated by to stack by the convection current plate from level to level and is carried out anneal.When adopting this conventional stack stacking method that coil of strip is annealed, for lower floor's coil of strip, it is stressed to comprise the axial force of three parts such as weight of the weight of weight, convection current plate of upper strata coil of strip and coil of strip itself.Because the existence of this axial force makes coil of strip can produce certain displacement and bring additional stress for the coil of strip interlayer in normal direction under the effect of poisson effect, thereby causes that the probability that the steel roll binding defective takes place in the annealing process increases.The generation of bonding defect has reduced the surface quality of being with steel on the one hand, makes on the one hand in addition the smooth operation operating rate reduction of back step to have brought enormous economic loss to the sheet-steel rolling mill.

Meanwhile, owing to batch on reeling machine with steel (the particularly following strip of 0.3mm) in the degreasing coiling process and the bleeding edge phenomenon can occur when bad, after causing the coil of strip shove charge, lower floor's coil of strip is under the common effect of upper strata coil of strip and convection current plate gravity, the generation of the folding longitudinal folding phenomenon of phenomenon coil of strip will appear in the vertical limit portion of band steel, not only when the smooth operation in downstream, make coil of strip open the comparison difficulty, and bring cut to roll surface easily, cause unexpected roll change.Under the more situation, longitudinal folding interior number of turns layer band often directly will take place at the scene directly is used as the steel scrap processing, brings the up to ten million units of financial loss every year for the sheet-steel rolling mill.Like this, how under the prerequisite that does not influence the unit production capacity, reduce bonding and longitudinal folding generation of defects to greatest extent, just become the difficult problem of on-the-spot tackling key problem.

For this reason, the utility model is on the basis of production technique that fully takes into account bell-type annealing and equipment characteristic, changing in the legacy equipment coil of strip is separated by to stack by the convection current plate from level to level and carries out the annealed treatment process, the mouse cage device of additional certain wall thickness in the coil of strip outer ring, the convection current plate directly is shelved on the mouse cage device, coil of strip only lower surface contacts with the convection current plate, and upper surface does not contact with the convection current plate, the weight of upper strata coil of strip and convection current plate is mainly born by the mouse cage device, thereby solved the problem of the vertical pressurized of lower floor's coil of strip in the legacy equipment cleverly, therefore not only can reduce the bonding incidence of lower floor's coil of strip greatly, and can reduce the longitudinal folding probability of occurrence of coil of strip accordingly.Adopt not only coil of strip stacking good stability but also do not need table, coil of strip aligning gear etc. is changed of correlation technique described in the utility model, improvement cost is little, and income is big.

Summary of the invention

The purpose of this utility model is to design a kind of stacking rack that is suitable for bell type annealing furnace, equipment such as table, coil of strip aligning gear are not being changed and guaranteed under the safe prerequisite, reduce the problem of the easily vertical pressurized of lower floor's coil of strip in traditional annealing device stacking procedure, reduce lower floor's steel roll binding and longitudinal folding probability of occurrence.

To achieve these goals, the technical solution of the utility model is,

A kind of stacking rack that is suitable for bell type annealing furnace, it comprises, body, it is cylindric skeleton construction, the upper and lower ends opening; Some convection current plates are sector structure, the one end with the body center be the center, along the circumference setting of body upper surface, and the convection current plate is positioned at body center one end and arranges and form duct for convection.

Again, described body is the squirrel-cage tube-in-tube structure.

The utility model is to add a load-bearing sleeve outside the coil of strip to replace inner sleeve, simultaneously the convection current plate is shelved on the sleeve, like this coil of strip only lower surface contact with the convection current plate, and upper surface does not contact with the convection current plate, the weight of upper strata coil of strip and convection current plate is mainly born by the body of the utility model squirrel-cage tube-in-tube structure, thereby solved the problem of the vertical pressurized of lower floor's coil of strip in the legacy equipment cleverly, therefore not only can reduce the bonding incidence of lower floor's coil of strip greatly, and can reduce the longitudinal folding probability of occurrence of coil of strip accordingly.

Especially, adopt the utility model that coil of strip is carried out anneal, before annealing, also can adopt the method for flexible shove charge.Because facts have proved, big coil volume does not exist the surface to damage problem by pressure, and has only rouleau just problems such as impression, bonding can occur in the annealing rear surface.Therefore not all coil of strip all will use sleeve when annealing.For reducing cost, and consider that the operative employee is easy to operate, and can control oneself and specify some annealing furnaces to be used for specially annealing to rouleau, adopt during rouleau to add sleeve annealed method, the other stove then can be used for specially to involving in row annealing greatly, and big volume annealing then can be omitted sleeve need not.Consider Special Circumstances.As when annealing anxiety, can take the pattern that loads in mixture, and small size coil of strip is placed on the bottom, amplify the form of coil of strip above.

The beneficial effects of the utility model

Compared with prior art, principal feature of the present utility model be in the annealing furnace relevant coil of strip only lower surface contact with the convection current plate, and upper surface does not contact with the convection current plate.Like this, the weight of upper strata coil of strip and convection current plate does not just need lower floor's coil of strip to bear, but bear by sleeve, thereby solved the problem of the vertical pressurized of lower floor's coil of strip in the legacy equipment cleverly, therefore not only can reduce the bonding incidence of lower floor's coil of strip greatly, and can reduce the longitudinal folding probability of occurrence of coil of strip accordingly.Compare with original technology, adopt the utility model steel roll binding incidence can reduce 50% at least, and the longitudinal folding incidence of coil of strip can reduce 80% at least.Especially, adopt original table after the new way of stacking, upright volume hangs does not need to transform, and stability accesses guarantee.

Description of drawings

Fig. 1 is the structural representation of the utility model one embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is a kind of mode synoptic diagram with wooden utility model stacking coil of strip;

Fig. 4 is the another kind of mode synoptic diagram with the utility model stacking coil of strip;

Fig. 5 is the third mode synoptic diagram with the utility model stacking coil of strip.

Embodiment

Referring to Fig. 1, Fig. 2, a kind of stacking rack that is suitable for bell type annealing furnace of the present utility model, it comprises, body 1, it is cylindric skeleton construction, the upper and lower ends opening; Some convection current plates 2 are sector structure, the one end with body 1 center be the center, along the circumference setting of body upper surface, and convection current plate 2 is positioned at body 1 center one end and arranges and form duct 3 for convection.

Described body 1 is the squirrel-cage tube-in-tube structure.

Referring to Fig. 3, it is depicted as a kind of way of stacking with the utility model stacking coil of strip, three coil of strips 4 are by the utility model stacking rack stacking in bell type annealing furnace 5, and the weight of upper strata coil of strip 4 and convection current plate 2 is mainly born by the body 1 of the utility model squirrel-cage tube-in-tube structure.

Referring to Fig. 4, four coil of strip 4 stackings, below 2 coil of strips 4 adopt 2 the utility model stacking racks, above two coil of strips 4 without the utility model stacking rack, top convection current plate 2 will bear the weight of two coil of strips.

Referring to Fig. 5, also be four coil of strips 4 of stacking, below 1 coil of strip 4 the utility model stacking rack, above three coil of strips without the utility model stacking rack, convection current plate 2 bears three coil of strip 4 weight.

Claims

1. a stacking rack that is suitable for bell type annealing furnace is characterized in that, comprise,

Body, it is cylindric skeleton construction, the upper and lower ends opening;

Some convection current plates are sector structure, the one end with the body center be the center, along the circumference setting of body upper surface, and the convection current plate is positioned at body center one end and arranges and form duct for convection.

2. the stacking rack that is suitable for bell type annealing furnace as claimed in claim 1 is characterized in that, described body is the squirrel-cage tube-in-tube structure.