CN108085478A - A kind of convection current dish structure - Google Patents
A kind of convection current dish structure Download PDFInfo
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- CN108085478A CN108085478A CN201611029090.2A CN201611029090A CN108085478A CN 108085478 A CN108085478 A CN 108085478A CN 201611029090 A CN201611029090 A CN 201611029090A CN 108085478 A CN108085478 A CN 108085478A
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- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 206010052428 Wound Diseases 0.000 description 32
- 208000027418 Wounds and injury Diseases 0.000 description 32
- 238000000137 annealing Methods 0.000 description 25
- 238000005457 optimization Methods 0.000 description 17
- 238000005520 cutting process Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 238000013461 design Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000005097 cold rolling Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000007857 degradation product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002271 resection Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000013075 data extraction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention discloses a kind of convection current dish structure, and the convection disc is made of top-down upper head plate, intermediate plate, bottom end plate；Upper head plate inboard groove from inside to outside is set on the upper head plate, groove on the outside of upper head plate central slot and upper head plate；Bottom end plate inboard groove from inside to outside is set on the bottom end plate, groove on the outside of bottom end plate central slot and bottom end plate；The upper head plate inboard groove is identical with bottom end plate inboard groove position and shape；The upper head plate central slot is identical with bottom end plate central slot position and shape；Groove is identical with groove location on the outside of bottom end plate and depth on the outside of the upper head plate, and the radical length of groove is more than the radical length of groove on the outside of bottom end plate on the outside of upper head plate.Advantages of the present invention：On the premise of steel coil end-face heating effect is met, ensure convection disc use intensity, the unification of convection disc specification is completed, and reduces wound volume.
Description
Technical field
The present invention relates to metallurgical technology fields, are specifically a kind of convection disc.
Background technology
Bottom convection disc (hereinafter referred to as convection disc) is one of cold rolling hood type annealing auxiliary device, and every piece of convection disc is by 20
The identical width page composition in fan-shaped arrangement, each width page is by upper head plate, bottom end plate and between upper head plate and bottom end plate
Intermediate plate forms.When bell type annealing furnace carries out recrystallization bright annealing to the coil of strip after cold rolling, convection disc is placed on heap up and down
Between pile coil of strip, the annealing medium in annealing furnace inner cover is made to keep air-flow unobstructed between stacking coil of strip, improve steel coil end-face heating
Effect ensures that coil of strip internal and external temperature is uniform in heating, heat preservation and cooling procedure, it is poor to reduce annealing coil cold spot, hot(test)-spot temperature.
Cold rolling Heat treating machine set uses bell-type annealing furnace annealing, in annealing process, the convection disc pair between stacking coil of strip
Inner diameter end, outer ring end and the commissure strip of coil of strip cause the different degrees of wounds such as wound, impression of pressing against to roll up defect, concrete condition
Show as at following 4 points：
Firstth, coil of strip is when skin pass mill group uncoiling produces, if outer ring wound volume is lighter, can form steel edge portion bonding and lack
It falls into, necessary complete resection, is downgraded to using material when at rear portion, finishing procedure produces；Outer ring wound volume is heavier, will be unable to uncoiling
Production by outer ring using water weldering, it is necessary to hinder volume part complete resection, cut-out presses waste disposal.
Secondth, in smooth production, hindering the part of volume must carry out cutting lower rouleau the inner ring wound volume of coil of strip, after cutting
Rouleau presses waste disposal.
3rd, shut down, carry out before skin pass mill group is when producing weld seam and overflowing wound volume, it is necessary to which coil of strip to be rolled down to position while welding
Bundling hangs out the wound volume with weld seam, and rolling up heavier situation according still further to outer ring wound is handled.If the wound overflowed to weld seam
Volume produces by force, then can press against and hinder working roll, forms periodic roll marks in belt steel surface, presses against print and generates degradation product.
4th, the German LOI of different model and matching somebody with somebody for Austria's EBNER annealing furnaces that Heat treating machine set different times are introduced
Convection disc is covered, each side such as material, dimensions, configuration of surface is being selected to differ, it is right in shove charge operation process to cause
Flow table cannot be used interchangeably, and affect the efficiency of Heat treating machine set.
More than 4 problems not only affect the quality of cold rolling carbon products, unit lumber recovery and operating rate, but also disappear
Substantial amounts of oxygen, acetylene and the professional coil of strip cutting additionally configured, repair personnel are consumed.Therefore, developing prevents cold rolling
The convection disc of bell type annealing furnace coil of strip impression, wound volume and steel bonding, is the technical problem to be solved in the present invention.
The convection disc of the prior art is generally the convection disc that top and bottom are planar shaped, upper head plate and bottom in loading furnace process
Upper and lower end face of the plate directly with stacking cold rolling coil contacts.Due to the width control under the conditions of no-station pole canopy end to end of strip when hot rolling produces
System is inaccurate (compared with middle part), and there are different degrees of ultra-wide phenomenons.And pickling and rolling combined unit production cold rolling carbon products
Shi Gangjuan all not trimmings, making incoming hot rolled slab, super wide part is all retained end to end, causes the inside and outside circle and weld seam of coil of strip
It is substantially uneven compared with intermediate end face, and there is spillover, bleeding edge width is 1~30mm.
In annealing process, in hot lower softening, it is right that the coil of strip being stacked passes through for core, outer ring and the commissure strip of spilling
Flow table width page overwhelms, and along the circumferential direction generate discontinuity, equal length presses against print and impression defect.
Chinese Patent Application No. 201620521234.5 discloses that " one kind can prevent cold-strip steel bell type annealing furnace steel bonding
Convection disc, belong to cold-strip steel bell type annealing furnace equipment technical field, for preventing coil of strip core and edge steel bonding, technology
Scheme is：The upper surface of convection disc and the circumferential edges of lower face are respectively recessed annulus, the baseplane of recessed annulus and convection current
The upper surface of disk is parallel with lower face, and the recessed annulus of upper surface and lower face is symmetrical with the central plane of convection disc, convection current
There is circular hole at the center of disk, and the diameter of circular hole is more than the core bore diameter of core of steel coil.The convection disc of the utility model is due to upper surface
It is recessed annular shape with the edge of lower face so that after strip coil of strip is placed on convection disc, inside certain in coil of strip periphery
The coil of strip side of width is not contacted with convection disc, while the center hole of convection disc causes core of steel coil not contacted with convection disc, with
This realizes steel roll rim and core non-stick steel.The utility model is simple in structure, easy to make, solves coil of strip in bell type annealing furnace
The problem of middle steel bonding ".The patent can not solve the technical issues of noted earlier, cannot especially solve because of core strip ultra-wide
And the coil of strip core overflowed, the core wound caused by being contacted with the bottom end plate of upper convection disc and the superior endplate surface of lower convection disc
Volume, can not solve the outside of the strip overflowed due to coil of strip position while welding ultra-wide and rouleau (coil of strip diameter≤1630mm) with it is upper
Wound volume on the outside of position while welding and rouleau caused by the contact of the superior endplate surface of the bottom end plate of convection disc and lower convection disc.
The content of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of convection discs, it can effectively solve above-mentioned technology and ask
Topic, specific technical solution are as follows：
A kind of convection current dish structure, the convection disc are made of top-down upper head plate, intermediate plate, bottom end plate；On described
Upper head plate inboard groove from inside to outside is set on end plate, groove on the outside of upper head plate central slot and upper head plate；The bottom end plate
Groove on the outside of the upper bottom end plate inboard groove set from inside to outside, bottom end plate central slot and bottom end plate；On the inside of the upper head plate
Groove is identical with bottom end plate inboard groove position and shape；The upper head plate central slot and bottom end plate central slot position and shape
Shape is identical；Groove is identical with groove location on the outside of bottom end plate and depth on the outside of the upper head plate, the radial direction of groove on the outside of upper head plate
Length is more than the radical length of groove on the outside of bottom end plate.Upper head plate central slot and bottom end plate central slot are two.
Advantages of the present invention：On the premise of steel coil end-face heating effect is met, ensure convection disc use intensity, completion pair
The unification of flow table specification, and reduce wound volume.It is solved the problems, such as using the present invention, is finally reached Improving The Quality of Products, promoted at heat
The operating rate of reason and skin pass mill group improves the lumber recovery of skin pass mill group, reduces energy consumption and people during coil of strip repair
The purpose of the power wasting of resources.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is core wound volume, the comparison situation schematic diagram of outer ring wound volume before and after convection disc optimization.
Specific embodiment
The present invention is illustrated below in conjunction with the accompanying drawings, as shown in Figure 1, the realization process of technical solution of the present invention is divided into five
The optimization of step, i.e. convection disc configuration of surface, the improvement for making material, the verification of Design and optimization design effect, the acquirement of dimensions
Economic benefit.
Convection disc configuration of surface optimizes
The pattern characteristic analysis of damage are caused to stacking coil of strip according to convection disc, the upper head plate, bottom end plate to convection disc
Configuration of surface is redesigned,
The surface of upper head plate, bottom end plate to convection disc has carried out machining.Cutting zone is divided into three areas, i.e. inside
Cutting region, outside cutting region and middle part cutting region.Processing principle and purpose are specifically described as follows：
Convection disc is made of top-down upper head plate 1, intermediate plate 2, bottom end plate 3；On the upper head plate 1 set by it is interior to
Groove 13 on the outside of outer upper head plate inboard groove 11, upper head plate central slot 12 and upper head plate；It is set on the bottom end plate 3 by interior
Groove 33 on the outside of to outer bottom end plate inboard groove 31, bottom end plate central slot 32 and bottom end plate；The upper head plate inboard groove
11 is identical with 31 position of bottom end plate inboard groove and shape；The upper head plate central slot 12 and 32 position of bottom end plate central slot
And shape is identical；Groove 13 is identical with 31 position of groove on the outside of bottom end plate and depth on the outside of the upper head plate, upper head plate outer concave
The radical length of slot 13 is more than the radical length of groove 31 on the outside of bottom end plate.
Processing purpose one：Surface (close to center line) on the inside of convection disc upper head plate and bottom end plate is processed as concave cutting
Area, i.e. upper head plate inboard groove 11 and bottom end plate inboard groove 31, the coil of strip core overflowed due to core strip ultra-wide, just can not
It is contacted with the bottom end plate of upper convection disc and the superior endplate surface of lower convection disc, so avoids core wound volume.
Processing purpose two：Surface on the outside of convection disc upper head plate and bottom end plate is processed as concave cutting region, i.e., outside upper head plate
Groove 33 on the outside of side groove 13 and bottom end plate, the position overflowed on the outside of volume (coil of strip diameter >=1930mm) strip greatly during ultra-wide,
It can not just be contacted with the bottom end plate of upper convection disc and the superior endplate surface of lower convection disc, thus effectively prevent volume outside wound greatly
Volume.
Processing purpose three：After convection disc upper head plate and bottom end plate middle part surface are processed as concave cutting region (at two), i.e., on
End plate central slot 12 and bottom end plate central slot 32, (coil of strip is straight for the strip and rouleau overflowed due to coil of strip position while welding ultra-wide
Footpath≤1630mm) outside, can not just contact with the bottom end plate of upper convection disc and the superior endplate surface of lower convection disc, thus keep away
Wound volume on the outside of position while welding and rouleau is exempted from.The Liang Chu concaves area of turning allow for rouleau weld metal zone (close to center line) and
The outside area (away from center line) of rouleau and the weld metal zone (away from center line) rolled up greatly not with convection disc end contact.
The design of convection disc dimensions
The height of convection disc is reduced to 55-62mm by 70mm, and outer diameter and internal diameter remain unchanged.
The products of volume 14808 of experiment, the indices of mechanical performance are satisfied by standard requirement.Therefore, convection disc height by
70mm is reduced to the concept feasible of 55-62mm, the material cost 14.29% thus saved.
Convection current side surface, highly optimize after compliance test result
According to the production operation of LOI and EBNER annealing furnaces, equipment operation and process characteristic, upper and lower end face to convection disc,
Design is optimized in making material, height dimension, by annealing and skin pass mill group field test, draws following three knots
By.
Core and outer ring wound volume weight decline after convection disc optimization
Core wound volume, the comparison situation of outer ring wound volume, are shown in Fig. 2 before and after convection disc optimization.
From Figure 2 it can be seen that core wound volume, outer ring wound volume weight decline month by month after convection disc optimization.Wherein, core wound volume by
2014 monthly 31.33 tons drop to 2015 18.54 tons, the range of decrease 40.82%；Outer ring wound volume by 2014 monthly 173.45 tons
Drop to 155.16 tons in 2015, the range of decrease 10.54%.
Weld seam wound volume quantity declines after convection disc optimization：
The comparison situation of weld seam wound volume quantity, is shown in Table 1 before and after convection disc optimization.
The comparison situation of weld seam wound volume quantity before and after the optimization of 1 convection disc of table
By table 1 as it can be seen that convection disc optimization after weld seam wound volume quantity by monthly, 2014 volume 187, drop to 2015 128
Volume, the range of decrease 31.74%.
Convection disc optimizes after annealing product stable mechanical performance
Convection disc optimization before and after, annealing DC01 trade mark 1.5mm thickness product mechanical performance comparison situation (data extraction according to
According to：The highest trade mark DC01 of 2014~2015 annual outputs, production ratio 75.15%.Yield in 2014~2015 years DC01 products
Highest gauge thickness 1.5mm, production ratio 17.34%), it is shown in Table 2.
The comparison situation of annealing product mechanical performance before and after the optimization of 2 convection disc of table
| Project | Average in 2014 | Average in 2015 | Standard value |
| Yield strength/MPa | 196.19 | 202.17 | [130,280] |
| Tensile strength/MPa | 324.30 | 322.93 | [270,410] |
| Elongation/% | 40.64 | 40.26 | [32,] |
By table 2 as it can be seen that convection disc optimization after annealing product the key technical indexes yield strength year average by 196.19MPa
202.17MPa is increased to, yield strength improves 5.98MPa, is more nearly standard average 205MPa.Tensile strength reduces
1.37MPa, elongation percentage reduce 0.38%, fully meet performance indicator requirement.
Final to determine, the series of optimum design to convection disc is rational, effective, can extensively should with batch making
It is produced for annealing unit.
Convection disc is before optimization design, since the manufacturing firm for introducing annealing furnace is different, the convection disc specification of design
It is different, cause the convection disc of different annealing furnaces cannot be used interchangeably, it, can not be efficiently sharp when overhead traveling crane carries out taking on stove operation
Multiple table work compounds are carried out with convection disc, affects and takes on stove operating rate.After convection disc optimization design, in one~fourth phase stove
When platform carries out taking on stove operation, the correspondence for considering convection disc and table can not had to, so not only alleviate overhead traveling crane behaviour
The labor intensity of work person and operation attention rate, while also improve and take on stove operating rate.Since Heat treating machine set is since operation
The always production " bottleneck " of cold rolling carbon products, therefore, the raising of operating rate is to being heat-treated the improvement meaning of " bottleneck " problem
It is great.
Improve skin pass mill group lumber recovery
After convection current side surface optimizes, core wound volume, outer ring wound volume and weld seam wound volume quantity are decreased obviously, smooth
Unit generate in process of production roll marks, press against print, the degradation product amount of bonding is constantly reduced, the lumber recovery of skin pass mill group is made to obtain one
Fixed to improve, unit lumber recovery 94.64% in 2014,2015 are 94.85%, and skin pass mill group lumber recovery improves 0.21%.
The popularization and application of new convection disc after optimization
The convection disc optimization design of use can promote the use of the annealing unit of domestic identical equipment, wherein only German
LOI stoves, the country just have 1200 to be sleeved on operation (" Lip river her thermal technology's engineering-Tianjin Co., Ltd " offer), therefore, application prospect
It is very wide, belong to sustainable development project.
Claims (2)
1. a kind of convection current dish structure, it is characterised in that：The convection disc is by top-down upper head plate, intermediate plate, bottom end plate group
Into；Upper head plate inboard groove from inside to outside is set on the upper head plate, groove on the outside of upper head plate central slot and upper head plate；Institute
It states and bottom end plate inboard groove from inside to outside is set on bottom end plate, groove on the outside of bottom end plate central slot and bottom end plate；On described
End plate inboard groove is identical with bottom end plate inboard groove position and shape；The upper head plate central slot and bottom end plate central slot
Position and shape are identical；Groove is identical with groove location on the outside of bottom end plate and depth on the outside of the upper head plate, upper head plate outer concave
The radical length of slot is more than the radical length of groove on the outside of bottom end plate.
2. convection current dish structure according to claim 1, it is characterised in that：Upper head plate central slot and bottom end plate central slot
It is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611029090.2A CN108085478A (en) | 2016-11-19 | 2016-11-19 | A kind of convection current dish structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611029090.2A CN108085478A (en) | 2016-11-19 | 2016-11-19 | A kind of convection current dish structure |
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| Publication Number | Publication Date |
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| CN108085478A true CN108085478A (en) | 2018-05-29 |
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| CN201611029090.2A Pending CN108085478A (en) | 2016-11-19 | 2016-11-19 | A kind of convection current dish structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201183813Y (en) * | 2008-03-31 | 2009-01-21 | 鞍钢股份有限公司 | Convection plate for cover-type annealing furnace |
| CN201459205U (en) * | 2009-06-23 | 2010-05-12 | 唐山建龙实业有限公司 | Cold-rolled-cover annealing furnace convection disc |
| CN101892377A (en) * | 2010-06-28 | 2010-11-24 | 莱芜钢铁股份有限公司 | Direct strong convection board used for hood-type annealing furnace and automatically suitable for cold-rolling strip steel bandwidth and working method thereof |
| CN203007348U (en) * | 2012-12-12 | 2013-06-19 | 河北钢铁集团衡水薄板有限责任公司 | Convection disc capable of preventing bonding steel of cold-strip steel housing anneal furnace |
-
2016
- 2016-11-19 CN CN201611029090.2A patent/CN108085478A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201183813Y (en) * | 2008-03-31 | 2009-01-21 | 鞍钢股份有限公司 | Convection plate for cover-type annealing furnace |
| CN201459205U (en) * | 2009-06-23 | 2010-05-12 | 唐山建龙实业有限公司 | Cold-rolled-cover annealing furnace convection disc |
| CN101892377A (en) * | 2010-06-28 | 2010-11-24 | 莱芜钢铁股份有限公司 | Direct strong convection board used for hood-type annealing furnace and automatically suitable for cold-rolling strip steel bandwidth and working method thereof |
| CN203007348U (en) * | 2012-12-12 | 2013-06-19 | 河北钢铁集团衡水薄板有限责任公司 | Convection disc capable of preventing bonding steel of cold-strip steel housing anneal furnace |
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Application publication date: 20180529 |