CN2806500Y - Cap cover furnace convection plate - Google Patents
Cap cover furnace convection plate Download PDFInfo
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- CN2806500Y CN2806500Y CN 200520024538 CN200520024538U CN2806500Y CN 2806500 Y CN2806500 Y CN 2806500Y CN 200520024538 CN200520024538 CN 200520024538 CN 200520024538 U CN200520024538 U CN 200520024538U CN 2806500 Y CN2806500 Y CN 2806500Y
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Abstract
A cap cover furnace convection plate includes partition plates and a connecting piece. The convection plate is characterized in that: it is also provided with a mouth-down U-shaped suspension ring welded together with the connecting plate of the connecting piece; the connecting piece comprises radiation-shaped connecting rods taking the connecting plate as the center; the partition plates are elongated fan-shaped partition plates welded on the both sides of the connecting rods; the middle part of the bottom of the elongated fan-shaped partition plate is welded with a bar shim plate; the distance between the outer end of the elongated fan-shaped partition plate and the symmetric line of the U-shaped suspension ring is larger than the radius of outer ring of a steel coil. The U-shaped suspension ring can be welded with an upper connecting plate and a lower connecting plate. The connecting rod of the connecting piece is provided with a locating ring. The locating ring is a transverse connecting rod horizontally extended outside from the outer rod of the upright U-shaped suspension ring. The inner side of the U-shaped suspension ring is welded with the upper and lower connecting plates, and the distance between the outer rod of the U-shaped suspension ring and the symmetric line of the U-shaped suspension ring is adjusted to the inner track radius of the steel coil. The cap cover furnace convection plate features in fluent air current, homogeneous thermal effectiveness and little damage of the steel coil in the annealing process.
Description
Technical field
The utility model relates to a kind of bell-type furnace convection plate.
Background technology
With perhydro cover annealing coil of strip, be that the above coil of strip of three volumes is piled up together, for fear of bonding, help the particularly circulation of hydrogen of air-flow in the bell furnace, convection current plate dividing plate is being set between last coil of strip and following coil of strip is being commonly referred to as the convection current plate upper and lower coil of strip is separated.Since 20th century the eighties, the steel rolling industry has adopted since the perhydro cover annealing coil of strip, adopts disc type convection current plate always.This class bell-type furnace convection plate is that the middle part has that between the last plectane 1 of ventilation opening 4 and the following plectane 3 radial stripe board 2 threes to be set integrally welded, formation advection passage 5 between the adjacent stripe board 2.Disc type convection current plate has certain effect to the circulation of annealed coil of strip protection with hydrogen; clearly this class convection current plate can only be worked hard in glove with air-flow between coil of strip outer ring and the coil of strip inner ring by advection passage 5; see Fig. 1; can not work hard in glove with the air-flow between the steel plates that reach 100 to 200 circles between coil of strip inner ring and the coil of strip outer ring; the airflow circulation poor effect, the temperature difference of bell type annealing furnace is big like this.When annealing, the temperature head of the difference in the bell furnace reaches 30 ℃, the temperature difference of same asynchronism(-nization) point during owing to annealing, and annealing performance difference, the steel plate difference in hardness of coil of strip difference is big.Owing to reach the coil of strip hardness difference of 400-700 rice, after annealing when rolling once more, little when big during the load of rolling-mill roller, can find out this point from the beating of ammeter pointer of rolling mill, designer of the present utility model finds that the maximum amplitude 3900 of beating of ammeter pointer reaches 33% with minimum radius 2600 differences.So just seriously influence the work-ing life of rolling mill, increased rolling cost.Existing in addition bell-type furnace convection plate only is applicable to that the good scroll end face of scroll is smooth, and no turriform, excessive coil of strip for the Steel Mill of no smooth coil of strip equipment, will cause the backfin at coil of strip turriform position, excessive position afterwards of annealing, and recovery rate is low.And the coil of strip after the hot rolling all has in various degree end face turriform (because continuously cast bloom overproof end to end, cause batching back coil of strip end face inner ring and exceed most of top planar part), excessive (phenomenon that generally exceeds the coil of strip diameter at the steel band afterbody).For end face turriform, excessive coil of strip, loss reaches 1.85% in perhydro cover annealing process.Existing in addition bell-type furnace convection plate must adopt the lifting of three arm type clamp, ten thousand yuan/platform of this equipment 20-30, and increase equipment drops into.
Summary of the invention
For overcome existing bell-type furnace convection plate when the perhydro cover annealing in the stove temperature head big, cause that the coil of strip difference in hardness is big to influence the big deficiency of coil of strip loss in rolling mill work-ing life and the annealing process, the utility model provide a kind of when the bell-type furnace annealing air-flow unimpeded, the little bell-type furnace convection plate of temperature head in the perhydro bell furnace, and the coil of strip loss is little in annealing process.
The technical solution of the utility model is the rectangular dividing plate that the whole dividing plate of bell-type furnace convection plate is changed into split, the area sector also bigger than rectangular dividing plate arranged between rectangular dividing plate and the rectangular dividing plate, not only there is the horizontal channel laterally to work hard in glove with the hydrogen of coil of strip inner ring and outer ring between the coil of strip under coil of strip and the bell-type furnace convection plate on the bell-type furnace convection plate, and between coil of strip inner ring and the coil of strip outer ring between stacked 100 multi-turn steel plates, hydrogen also can circulate up and down, make hydrogen more unimpeded, the temperature head when reducing to anneal in the bell furnace and the homogeneity of plate property.Under rectangular dividing plate, weld the bar shaped backing plate, increasing bell-type furnace convection plate homogeneity to coil of strip profile external pressure in annealing.
Bell-type furnace convection plate of the present utility model comprises dividing plate and web member, and dividing plate and web member are welded as a whole, and it is characterized in that: the downward U-shaped suspension ring of mouth that are used to lift also are being set, and the web plate at web member center and U-shaped suspension ring weld together; Said web member is to be the center with the web plate and to be actinoid minimum three union levers of one-tenth of one, how to ten union levers, is generally four to six union levers; Said dividing plate is the rectangular sallop screen that is welded on the union lever both sides of web member, and rectangular sallop screen is welded on union lever and forms radiation shape, and two rectangular sallop screens are being welded in every union lever both sides; Welding the bar shaped backing plate below rectangular sallop screen, the bar shaped backing plate is welded on the middle part of rectangular sallop screen, and the length of bar shaped backing plate is the 1/3-1/2 of rectangular sallop screen.When the bell-type furnace convection plate was placed on the coil of strip, the bar shaped backing plate was pressed between the inner ring and outer ring of coil of strip end face.Be welded between two rectangular sallop screens of same union lever both sides and form at interval.The radius of the distance of U-shaped suspension ring symmetric line greater than the coil of strip outer ring arrived in rectangular sallop screen outer end, is generally the 800-1050 millimeter.
Above-mentioned bell-type furnace convection plate, it is characterized in that: under every union lever, welding the location backing plate, backing plate outer end, location is circular arc or hypotenuse, backing plate outer end, location to the distance of symmetry centre with adapt less than coil of strip inner ring radius and with the radius of coil of strip inner ring, when stacking, the outer end of location backing plate is filled in the inner ring of following coil of strip, when being convenient to stacking and following coil of strip location.
Above-mentioned bell-type furnace convection plate, it is characterized in that: welding upper and lower two gusset plates at the U-shaped suspension ring, union lever at said web member has a retaining ring, retaining ring is that the outside level of outboard beam of vertical U-loop is stretched out a horizontal union lever, and weld a transverse bar at the U-shaped mouth and constitute, the inboard of U-loop is welded on upper and lower two web plates, and the uniform retaining ring of symmetry is radiation shape in horizontal plane.The U-loop outboard beam adapts less than coil of strip inner ring radius and with the inner ring radius of coil of strip to the distance of U-shaped suspension ring symmetric line, is generally the 355-375 millimeter.During stacking, following coil of strip inner ring is enclosed within outside four retaining rings, is convenient to location down.
Can weld retaining ring on the U-shaped on the top of each U-loop, the retaining ring outboard beam adapts less than the inner ring radius of coil of strip and with coil of strip inner ring radius to the distance of U-shaped suspension ring symmetric line on the U-shaped.During stacking, the inner ring of top coil of strip is enclosed within four and goes up outside the retaining ring, is convenient to the coil of strip location.
Because this bell-type furnace convection plate is taked said structure, in perhydro cover annealing process, distance between the upper and lower adjacent coil of strip increases, and has increased the hydrogen path between the coil of strip, and not only coil of strip outer ring and coil of strip inner ring and coil of strip end face form the hydrogen path, steel ring gap between the inside and outside circle of coil of strip also forms the hydrogen path, compare with existing bell-type furnace convection plate, the air-flow in the bell furnace is more unimpeded, more helps the atmosphere circulation and flows fast, shorten annealing time, boost productivity.Having a narrow range of temperature between the while coil of strip different sites, heat treatment performance is even, after tested, and when thermal treatment, the temperature head of same asynchronism(-nization) point is not more than 10 ℃ in the bell furnace, has improved the homogeneity of coil annealing performance in the perhydro bell furnace and the smooth finish of steel strip surface.The rolling-mill roller load evenly when following one steel rolling, through on probation, adopt the coil of strip of this bell-type furnace convection plate during cover annealing, in the operation of rolling, beat maximum amplitude and the minimum radius difference of the ammeter pointer of rolling mill are 5%, have prolonged the work-ing life of rolling mill and roll.Adopt rectangular sallop screen, reduced the weight of bell furnace convection current sheet material matter, save starting material.Rectangular sallop screen is welding bar shaped backing plate down, increased bell-type convection current plate homogeneity in annealing to coil of strip profile external pressure, convection current plate dividing plate is that rectangular sallop screen is under the pressure of the several coil of strip weight in top, not direct contact zones head tower shape, excessive position, improved because of band steel toe and the inhomogeneous backfin phenomenon that causes turriform, excessive position of band steel tail width, coil of strip remains planeness preferably, therefore can not cause because of the back coil of strip hardness reduction of annealing, thereby can reduce turriform, excessive loss, reduce maintenance cost.Adopt existing disc type convection current plate,, now adopt the loss in the cover annealing process of convection current slab volume of the present utility model to be reduced to 0.69% because the bell-type furnace convection plate is 29.6% to the loss that the backfin phenomenon at turriform, excessive position causes.For the stainless steel Steel Mill that produces 200000 tons per year, the direct economic benefit of obtaining reaches 4,350,000 every year.(with existing bell-type furnace convection plate side cut ratio is 29.6%, with side cut rate behind this bell-type furnace convection plate is 0.69%, 4070 yuan of 20 millimeters ÷ of side cut loss ratio, 1080 millimeters=1.85% annealing stainless steel finished product and the average price differences of steel scrap, calculate by producing 200000 tons of stainless steel annealings per year, reduce the loss 200,000 tons * (29.6%-0.69%) * 1.85% * 4070 yuan/ton=4,350,000 yuan.) welding the U-shaped suspension ring that lift usefulness, when anneal, use the overhead traveling crane auxiliary hook to hook the U-shaped suspension ring and can lift by crane.
Description of drawings
Fig. 1 is the radial cross-section of existing bell-type furnace convection plate.
Fig. 2 is the radial cross-section of bell furnace convection current plate embodiment one of the present utility model.
Fig. 3 is and the corresponding vertical view of Fig. 2.
Fig. 4 is and the corresponding upward view of Fig. 2.
Fig. 5 is the part sectioned view along A-A line among Fig. 3.
Fig. 6 is the radial cross-section of bell furnace convection current plate embodiment two of the present utility model.
Fig. 7 is the radial cross-section of bell furnace convection current plate embodiment three of the present utility model.
The corresponding vertical view of Fig. 8 and Fig. 7.
Fig. 9 is the sectional view along D-D line among Fig. 8.
Figure 10 is the sectional view along B-B line among Fig. 7.
Figure 11 is the sectional view along C-C line among Fig. 7.
Figure 12 is the radial cross-section of bell furnace convection current plate embodiment four of the present utility model.
Figure 13 is the vertical view that bell furnace convection current plate embodiment three of the present utility model is placed on coil of strip.
Figure 14 is the axial sectional view that bell furnace convection current plate embodiment three of the present utility model is placed on coil of strip.
Figure 15 be bell furnace convection current plate embodiment of the present utility model three with coil of strip be stacked in the perhydro bell furnace reference drawing.
Figure 16 be bell furnace convection current plate embodiment of the present utility model with coil of strip be stacked in the perhydro bell furnace reference drawing.
Figure 17 is that bell furnace convection current plate embodiment three of the present utility model is stacked in the interior reference drawing of perhydro bell furnace with embodiment one and coil of strip.
Figure 18 is that bell furnace convection current plate embodiment three of the present utility model is stacked in the interior reference drawing of perhydro bell furnace with coil of strip.Among the above-mentioned figure:
1, goes up plectane 2, stripe board 3, following plectane 4, ventilation opening 5, advection passage
6, rectangular sallop screen 7, bar shaped backing plate 8, union lever 9, web plate
10, U-shaped suspension ring 11, interval 12, location backing plate 13, retaining ring 14, transverse bar
15, upper junction plate 16, lower connecting plate 17, U-loop 18, horizontal union lever
19, outboard beam 20, interior side lever 21, last retaining ring 22, bell-type furnace convection plate
23, gap 24, inner ring 25, coil of strip 26, outer ring 27, interior turriform
28, outer turriform 29, hydrogen stream 30, bell furnace inner cover 31, hydrogen stream 32, gap
33, gap 34, hydrogen stream 35, ventilating pit 36, bearing 37, inner ring
38, table 39, admission piece 40, exhaust nozzle 41, admission piece 42, bell-type furnace convection plate
Embodiment
Below by embodiment and description of drawings embodiment of the present utility model thereof, but the bell-type furnace convection plate is not limited to following embodiment.
The bell-type furnace convection plate that Fig. 2 and Fig. 3 describe comprises dividing plate and web member, and dividing plate and web member are welded as a whole, and it is characterized in that: the downward U-shaped suspension ring 10 of mouth that are used to lift also are being set, and the web plate 9 and the U-shaped suspension ring 10 at web member center weld together; Criss-cross four union levers 8 of composition that said web member is is one with circular web plate 9, welding a rectangular sallop screen 6 on the both sides of every union lever 8, between two adjacent rectangular sallop screens 6, form interval 11, below the middle part of each rectangular fanning strip 6, weld bar shaped backing plate 7, seeing Fig. 4, Fig. 5.The length of bar shaped backing plate 7 is the 1/3-1/2 of rectangular sallop screen 6.The radius of the distance of U-shaped suspension ring 10 symmetric line greater than the coil of strip outer ring arrived in rectangular sallop screen 6 outer ends, is 900 millimeters.
The embodiment two of this bell-type furnace convection plate sees Fig. 6, and it is that every union lever at embodiment one is welding location backing plate 12 8 times, and backing plate 12 outer ends, location are circular arc.
The embodiment three of this bell-type furnace convection plate sees Fig. 7, Fig. 8, present embodiment with adopted and above-mentioned two web members that embodiment is different.Present embodiment is welding up and down the i.e. circular upper junction plate 15 and lower connecting plate 16 among the figure of two web plates at U-shaped suspension ring 10, welding four retaining rings 13 that symmetry is uniform at upper junction plate 15 and lower connecting plate 16, retaining ring 13 is that a side of vertical U-loop 17 is that outboard beam 19 outside levels are stretched out a horizontal union lever 18, and weld a transverse bar 14 at the U-shaped mouth and constitute, the promptly interior side lever 20 of the opposite side of U-loop 17 is welded on upper junction plate 15 and lower connecting plate 16, sees Fig. 9, Figure 10 and Figure 11.Four uniform retaining rings 13 of symmetry are radiation shape in horizontal plane.The both sides that the level that per two rectangular sallop screens 6 are welded to U-loop 17 is stretched out horizontal union lever 18, present embodiment has eight rectangular sallop screens 6, the length of rectangular sallop screen 6 is 2 times of horizontal union lever 18, forms at interval 11 between two adjacent rectangular sallop screens 6.U-loop 17 outboard beam 19 adapt to the distance of the U-shaped suspension ring 10 symmetric line inner ring radius with coil of strip, are 355 millimeters.The radius of the distance of U-shaped suspension ring 10 symmetric line greater than the coil of strip outer ring arrived in rectangular sallop screen 6 outer ends, is 900 millimeters, 640 millimeters of rectangular sallop screen 6 length, and the outer end is wide 178 millimeters, and is inner wide 66 millimeters.
Present embodiment is welding bar shaped backing plate 7 in the bottom of each rectangular sallop screen 6, and bar shaped backing plate 7 is welded on the middle part of rectangular sallop screen 6, and the length of bar shaped backing plate 7 is 300 millimeters, sees Fig. 9.
The embodiment four of this bell-type furnace convection plate sees Figure 12, and it is a retaining ring 21 on the top of each U-loop 17 of embodiment three welding U-shaped.
Embodiment three with this bell-type furnace convection plate illustrates installing and using of this bell-type furnace convection plates.Figure 13, Figure 14 are seen in the placement of this bell-type furnace convection plate 22 on coil of strip 25.As seen from Figure 13, the sectorial area between the rectangular sallop screen 6 is much larger than the area of rectangular sallop screen 6, and hydrogen circulates up and down when helping anneal.As can be seen from Figure 14, owing to welding bar shaped backing plate 76 times at rectangular sallop screen, the interior turriform of coil of strip 25 does not contact with rectangular sallop screen 6 lower surfaces with outer turriform 28.In the perhydro bell furnace inner cover 30 in Figure 15 three coil of strips 25 are installed, cushion a bell-type furnace convection plate 22 for 25 times at each coil of strip.Bearing 36 is being set on table 38, the bearing 36 upper plates ventilating pit 35 that distributing, inner ring 37 is arranged at the middle part of bearing 36 so that ventilation and retaining ring 13 location.
The use of the embodiment one of this bell-type furnace convection plate is installed with three coil of strips 25 referring to Figure 16 in the perhydro bell furnace inner cover 30 in the drawings, cushions a bell-type furnace convection plate 42 for 25 times at each coil of strip.Nethermost bell-type furnace convection plate 42 is placed on the table 38.Very big area air feed stream circulation is up and down arranged between the rectangular sallop screen 6 in horizontal plane, guarantee that not only hydrogen stream 34 circulates from extroversion, hydrogen stream 29 circulates downwards from steel ring 25 inner rings, the hydrogen stream that has laterally circulates, circulated up and down in the interval 32 of hydrogen stream 31 between coil of strip 25 middle part steel rings, obviously increase the circulation path of hydrogen stream.
Bell furnace convection current plate embodiment three is stacked in the perhydro bell furnace with embodiment one and coil of strip and is used among Figure 17, and the bell-type furnace convection plate 42 of embodiment one need not bearing 36 in the bottom.
Bell furnace convection current plate embodiment three is stacked in the perhydro bell furnace with coil of strip among Figure 18, and nethermost coil of strip directly is deposited in table 38.
Claims (4)
1, a kind of bell-type furnace convection plate, it comprises dividing plate and web member, dividing plate and web member are welded as a whole, and it is characterized in that: the downward U-shaped suspension ring of mouth that are used to lift also are being set, and the web plate at web member center and U-shaped suspension ring weld together; Said web member is to be the center with the web plate and to be actinoid minimum three union levers of one-tenth of one; Said dividing plate is the rectangular sallop screen that is welded on the union lever both sides of web member, and rectangular sallop screen is welded on union lever and forms radiation shape; Welding the bar shaped backing plate below rectangular sallop screen, the bar shaped backing plate is welded on the middle part of rectangular sallop screen, and the length of bar shaped backing plate is the 1/3-1/2 of rectangular sallop screen; Be welded on and form between two rectangular sallop screens of same union lever both sides at interval; The radius of the distance of U-shaped suspension ring symmetric line greater than the coil of strip outer ring arrived in rectangular sallop screen outer end.
2, bell-type furnace convection plate according to claim 1, it is characterized in that: under every union lever, welding the location backing plate, backing plate outer end, location is circular arc or hypotenuse, backing plate outer end, location to the distance of symmetry centre with adapt less than coil of strip inner ring radius and with the radius of coil of strip inner ring.
3, bell-type furnace convection plate according to claim 1, it is characterized in that: welding upper and lower two gusset plates at the U-shaped suspension ring, union lever at said web member has a retaining ring, retaining ring is that the outside level of outboard beam of vertical U-loop is stretched out a horizontal union lever, and weld a transverse bar at the U-shaped mouth and constitute, the inboard of U-loop is welded on upper and lower two web plates, and the uniform retaining ring of symmetry is radiation shape in horizontal plane; The U-loop outboard beam to the distance of U-shaped suspension ring symmetric line less than adapting with the inner ring radius of coil of strip and with coil of strip inner ring radius.
4, bell-type furnace convection plate according to claim 3 is characterized in that: retaining ring on the top of each U-loop welding U-shaped, the retaining ring outboard beam adapts less than the inner ring radius of coil of strip and with coil of strip inner ring radius to the distance of U-shaped suspension ring symmetric line on the U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024538 CN2806500Y (en) | 2005-07-23 | 2005-07-23 | Cap cover furnace convection plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024538 CN2806500Y (en) | 2005-07-23 | 2005-07-23 | Cap cover furnace convection plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2806500Y true CN2806500Y (en) | 2006-08-16 |
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ID=36920800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520024538 Expired - Fee Related CN2806500Y (en) | 2005-07-23 | 2005-07-23 | Cap cover furnace convection plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2806500Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333088C (en) * | 2005-07-23 | 2007-08-22 | 山西太钢不锈钢股份有限公司 | Cage type furnace convection plate |
-
2005
- 2005-07-23 CN CN 200520024538 patent/CN2806500Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333088C (en) * | 2005-07-23 | 2007-08-22 | 山西太钢不锈钢股份有限公司 | Cage type furnace convection plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANXI TAIGANG STAINLESS STEEL CO., LTD. Free format text: FORMER OWNER: TAIYUAN IRON AND STEEL (GROUP) CO LTD Effective date: 20070629 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070629 Address after: 030003 No. 2 lawn street, Taiyuan, Shanxi Patentee after: Shanxi Taigang Stainless Steel Co., Ltd. Address before: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Patentee before: Taiyuan Iron & Steel (Group) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 |