CN102586565B - Rapid cooling method and device after medium and thick plate heat treatment furnace - Google Patents
Rapid cooling method and device after medium and thick plate heat treatment furnace Download PDFInfo
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- CN102586565B CN102586565B CN201210065593.0A CN201210065593A CN102586565B CN 102586565 B CN102586565 B CN 102586565B CN 201210065593 A CN201210065593 A CN 201210065593A CN 102586565 B CN102586565 B CN 102586565B
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Abstract
The invention provides a rapid cooling method after a medium and thick plate heat treatment furnace. The method comprises the following steps of: in the conveying process of steel plates treated by using a heat treatment furnace, preliminarily reducing the temperature of the steel plates in a gas blowing mode, and further reducing the temperature of the steel plates in a contact cooling mode. A rapid cooling device after the medium and thick plate heat treatment furnace comprises an air cooling mechanism and a roller cooling mechanism which are sequentially arranged behind the heat treatment furnace, wherein the air cooling mechanism comprises a roller way for conveying the steel plates, and a cooling spray pipe for spraying cooling gas to the steel plates in the conveying process; and the roller cooling mechanism comprises a plurality of water-cooled conveying rollers which are used for exchanging heat with the steel plates in the conveying process. Compared with cooling bed equipment and other cooling modes, the rapid cooling device and the rapid cooling method have the advantages that: auxiliary equipment and processes such as loading and unloading are not required, and the steel plates are cooled in the conveying process, so that the equipment cost is reduced, and the cooling efficiency is also improved.
Description
Technical field
The invention belongs to the Field of Heat-treatment of sheet material, refer to particularly fast cooling method and fast cooling device after a kind of heat treatment for medium plate stove stove.
Background technology
Compare the feature such as coils of hot-rolled steel crosscut plate has thin thickness (the thinnest 4mm of reaching), weight per unit area is little, rhythm of production is fast with hot rolled heavy plate.Coils of hot-rolled steel crosscut plate heat-treatment lines aims to provide the medium-thick plate of above-mentioned high-performance, thin specification, high added value, so the equipment on heat-treatment lines all needs to meet the demand that fast pace is produced.Cooling after existing heat treatment furnace generally completed by cooling bed device, cooling bed device is divided into stepping beam type cold bed, plate wheel formula cold bed, the board-like cold bed of chain sublattice, rolling claw-type cold bed and carries five kinds of forms such as chain type cooling bed, the cold bed of which kind of form has all needed the process of material loading, cooling and discharging, each process all needs peculiar equipment and mechanism to complete, and what process of cooling adopted is the mode of naturally cooling, so the cooling bed device of traditional sense be not suitable for fast pace need of production.
In addition, because cold bed has adopted naturally cooling mode, so be the principal element that determines the final cooling temperature of steel plate cooling time.Meet the high production capacity of heat-treatment lines, allegro needs, cold bed just must have enough large area so, so that large-tonnage product has sufficient cooling time, this can increase facility investment undoubtedly, and needs larger plant area (when particularly thermal treatment is across width).
Therefore, the demand of producing for adapting to coils of hot-rolled steel crosscut plate heat-treatment lines fast pace, solve the existing type of cooling and the equipment drawback on the type heat-treatment lines, need badly design a kind of heat-treatment furnace after fast cooling method and device, to realize the cooling of heat-treated steel plate.
Summary of the invention
Technical problem to be solved by this invention is just to provide fast cooling method and fast cooling device after a kind of heat treatment for medium plate stove stove, can realize cooling in course of conveying of steel plate, significantly reduces cooling time.
For solving the problems of the technologies described above, fast cooling method after a kind of heat treatment for medium plate stove stove provided by the invention, at steel plate in the course of conveying after heat treatment furnace is processed, first adopt Gas injection mode that steel plate is tentatively lowered the temperature, then adopt the contact type of cooling to make the further method of cooling of steel plate.
In technique scheme, described Gas injection mode makes the temperature of steel plate be down to 200 ~ 450 ℃.
In technique scheme, the described contact type of cooling makes the temperature of steel plate be down to 80 ~ 200 ℃.
Fast cooling device after a kind of heat treatment for medium plate stove stove provided by the invention, comprises the He Gunleng mechanism of air cooling mechanism being set in turn in after heat treatment furnace; Described air cooling mechanism comprises the roller-way for delivery of steel plate, and air cooling mechanism also comprises cooling spray pipe, for spraying cooling gas at course of conveying to steel plate; Described Gun Leng mechanism comprises some water-cooled conveying rollers, for carrying out heat exchange at course of conveying and steel plate.
In technique scheme, described cooling spray pipe comprises some upper cooling spray pipes and/or lower cooling spray pipe; Described upper cooling spray pipe is arranged at roller-way top, and described lower cooling spray pipe is arranged between the adjacent rollers of roller-way.
In technique scheme, in described air cooling mechanism, for delivery of the roller-way of steel plate, be air cooling conveying roller; Described air cooling conveying roller comprises driving motor, shaft coupling, bearing support and the body of roll, described driving motor is connected with the back side of the body of roll by shaft coupling, described body of roll two ends are fixedly mounted on roller-way framework by bearing support respectively, the body of roll is hollow tubular, the fore side spindle nose of the body of roll is communicated with steam line by swivel joint, for import cooling gas in the body of roll, the sidewall of the body of roll is distributed with spray orifice, for deriving cooling gas.
Further, be provided with taper inner tube in the described body of roll, the vertex of a cone of described taper inner tube is positioned at the fore side of the body of roll.
In technique scheme, described Gun Leng mechanism comprises upper water-cooled conveying roller and the lower water-cooled conveying roller of some positioned opposite, and the spacing of every pair of upper water-cooled conveying roller and lower water-cooled conveying roller is consistent with steel plate thickness.
In technique scheme, between described heat treatment furnace and air cooling mechanism, be provided with hot metal detector.
In technique scheme, between He Gunleng mechanism of described air cooling mechanism, be provided with the first cold/hot metal detector, Gun Leng mechanism end is provided with the second cold/hot metal detector.
Beneficial effect of the present invention is:
1) compare with cooling bed device and the type of cooling thereof, this fast cooling device and method be without the utility appliance such as material loading, discharging and process, realized cooling in course of conveying of steel plate, both reduced equipment cost, also improved cooling efficiency;
2) compare with cold bed naturally cooling mode, the present invention utilizes air cooling winding-up, cooling contact cooling, and its speed of cooling is fast, and then has improved unit production capacity;
3) steel plate is cooling through air cooling winding-up and contact successively, and this Process Design is reasonable, speed of cooling is moderate, and the tissue of steel plate and plate shape are had no adverse effects;
4) due to this fast cooling device, be the extension of heat treatment furnace length direction, thus to the width of heat-treatment lines without particular requirement, be conducive to sleeve configuration plant layout.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of fast cooling device of the present invention.
Fig. 2 is the structural representation of Fig. 1 device when Gun Leng mechanism working order.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 2.
In figure: 1-steel plate, 2-air cooling mechanism, 3-Gun Leng mechanism, 4-heat treatment furnace, 5-hot metal detector, the 6-the first cold/hot metal detector, the 7-the second cold/hot metal detector, 8-air cooling conveying roller (wherein: 8.1-driving motor, 8.2-shaft coupling, 8.3-bearing support, 8.4-body of roll, 8.5-swivel joint, 8.6-steam line, 8.7-taper inner tube, 8.8-spray orifice), 9-upper cooling spray pipe, 10-lower cooling spray pipe, 11-lower water-cooled conveying roller, 12-upper water-cooled conveying roller, 13-conveying roller.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in further detail.
Fast cooling method after the heat treatment for medium plate stove stove of the present embodiment, at steel plate in the course of conveying after heat treatment furnace is processed, first adopt Gas injection mode to make steel plate tentatively be cooled to approximately 200 ~ 450 ℃, then adopt the contact type of cooling to make steel plate further be cooled to the method for approximately 80 ~ 200 ℃.Adopt this method of cooling, not only can greatly shorten the cooling time of steel plate 1, enhance productivity, and reasonably rate of cooling has no adverse effects to steel plate 1 tissue and plate shape.
Here the case history of take is described in detail above-mentioned fast cooling method: the plate of moderate thickness that the steel plate 1 in this example is 10mm as thickness, and approximately 900 ℃ of its tapping temperatures, transhipment temperature is 150 ℃, envrionment temperature is 25 ℃.As adopt traditional cold bed mode, and from 900 ℃, being cooled to 150 ℃ approximately needs 916s, considers material loading, discharging each about 45s opening time, and whole process of cooling required time is asked 1006s, i.e. 16.8min; While adopting the inventive method, with the speed of 3.3 ℃/s, carry out Gas injection mode cooling, from 900 ℃, be cooled to 300 ℃ of about 180s of needs, with 30 ℃/s speed, carry out the contact type of cooling more cooling, be cooled to 150 ℃ of needs 5s from 300 ℃, come to 185s, i.e. 3.1min.And the mode of slow cooling between high-temperature zone, low-temperature range chilling can not make steel plate produce martensite or bainite transformation, and then change steel plate weave construction; Can not produce larger structural stress and thermal stress, and then affect plate shape yet.
As depicted in figs. 1 and 2, fast cooling device after a kind of heat treatment for medium plate stove stove of the present invention, comprises the 2 He Gunleng mechanisms 3 of air cooling mechanism that are set in turn in after heat treatment furnace 4.Air cooling mechanism 2 comprises the roller-way for delivery of steel plate 1, also comprises cooling spray pipe, for spraying cooling gas at course of conveying to steel plate 1.Gun Leng mechanism 3 comprises some water-cooled conveying rollers, for carrying out heat exchange at course of conveying and steel plate 1.In addition, between heat treatment furnace 4 and air cooling mechanism 2, be provided with hot metal detector 5, between 2 He Gunleng mechanisms 3 of air cooling mechanism, be provided with the first cold/hot metal detector 6, Gun Leng mechanism 3 ends are provided with the second cold/hot metal detector 7.
In the air cooling mechanism 2 of the present embodiment, for delivery of the roller-way of steel plate 1, be air cooling conveying roller 8, as shown in Figure 3.This air cooling conveying roller 8 comprises driving motor 8.1, shaft coupling 8.2, bearing support 8.3 and the body of roll 8.4, driving motor 8.1 is connected with the back side of the body of roll 8.4 by shaft coupling 8.2, the body of roll 8.4 two ends are fixedly mounted on roller-way framework by bearing support 8.3 respectively, the body of roll 8.4 is hollow tubular, its fore side spindle nose is communicated with steam line 8.6 by swivel joint 8.5, be used for to the interior importing cooling gas of the body of roll 8.4, the sidewall of the body of roll 8.4 is distributed with spray orifice 8.8, for deriving cooling gas.In addition, in the body of roll 8.4, be also provided with taper inner tube 8.7, the vertex of a cone of this taper inner tube 8.7 is positioned at the fore side of the body of roll 8.4, its existence makes the body of roll 8.4 internal spaces be diminished gradually to back side by fore side, and then guarantee to be evenly arranged in the body of roll 8.4 from the cooling gas of fore side, and it is cooling to realize to spray to equably steel plate 1.
In the air cooling mechanism 2 of the present embodiment, cooling spray pipe comprises some upper cooling spray pipes 9 and lower cooling spray pipe 10.Lower cooling spray pipe 10 is arranged between adjacent air cooling conveying roller 8, upper cooling spray pipe 9 be arranged at roller-way top, with lower cooling spray pipe 10 positioned opposite.
The Gun Leng mechanism 3 of the present embodiment comprises upper water-cooled conveying roller 12 and the lower water-cooled conveying roller 11 of six pairs of positioned opposite, and the height of upper water-cooled conveying roller 12 can be adjusted, so that the spacing of every pair of upper and lower water-cooled conveying roller 12,11 and steel plate 1 consistency of thickness.
The principle of work of this fast cooling device is: when steel plate 1 completes after heating and thermal insulation, with certain speed (as 20m/min), from heat treatment furnace 4, enter continuously and pass through this fast cooling device.In the process that steel plate 1 is advanced, first hot metal detector 5 detects the head of steel plate 1, the upper and lower cooling spray pipe 9,10 of trigger gas device for cooling 2 and the work of air cooling conveying roller 8, when steel plate 1 by time its temperature is down to 300 ℃ of left and right; The first cold/hot metal detector 6 between air-cooling apparatus 2 and roller device for cooling 3 detects after signal, the waterworks of roller device for cooling 3 is started working, when steel plate 1 is interval by this, the heat of steel plate 1 is passed to water coolant and is down to 150 ℃ of left and right by the roller wall of upper and lower water-cooled conveying roller 12,11; When steel plate 1 afterbody leaves the first cold/hot metal detector 6, air-cooling apparatus 2 quits work, and when steel plate 1 afterbody leaves the second cold/hot metal detector 7, roller device for cooling 3 waterworkss quit work.Cooled steel plate 1 flows to down-stream by common conveying roller 13.
Core of the present invention is to make steel plate 1 cooling through air cooling winding-up and contact successively, to realize cooling in course of conveying of steel plate 1.So its protection domain is not limited to above-described embodiment.Obviously, those skilled in the art can carry out various changes and distortion and not depart from the scope of the present invention and spirit the present invention, for example: air cooling mechanism 2 is not limited to the structure of air cooling conveying roller 8 and upper and lower cooling spray pipe 9,10 combinations in embodiment, adopt separately air cooling conveying roller 8 also can realize the air cooling winding-up of steel plate 1 in course of conveying cooling, air cooling mechanism 2 also can adopt the combination of common conveying roller 13 and cooling spray pipe, or other existing structure etc.; The spacing of the structure of Gun Leng mechanism 3 and water-cooled conveying roller 12,11 thereof, number also can be adjusted according to steel plate 1 specification; For detection of the sensor of steel plate 1 position, be also not limited to the combination of above-mentioned hot metal detector 5, the first cold/hot metal detector 6, the second cold/hot metal detector 7, as long as can monitor out steel plate 1 position, to provide, trigger and close the signal of air cooling mechanism 2, Gun Leng mechanism 3 and just can realize the technology of the present invention effect; The rate of cooling of Gas injection mode and the contact type of cooling is also not limited to described in embodiment, as long as guarantee Gas injection mode (steel plate 1 is interval in comparatively high temps) slow cooling, the contact type of cooling (steel plate 1 is interval in lesser temps) chilling, to avoid weave construction and the plate shape of sheet material to change and can wait.If these changes and distortion belong in the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and is out of shape interior.
Claims (6)
1. a fast cooling device after heat treatment for medium plate stove stove, is characterized in that: it comprises the He Gunleng mechanism of air cooling mechanism (2) (3) being set in turn in after heat treatment furnace (4), described air cooling mechanism (2) comprises the roller-way for delivery of steel plate (1), roller-way for delivery of steel plate (1) is air cooling conveying roller (8), to realize the air cooling of steel plate (1), jet cooling, described air cooling conveying roller (8) comprises driving motor (8.1), shaft coupling (8.2), bearing support (8.3) and the body of roll (8.4), described driving motor (8.1) is connected with the back side of the body of roll (8.4) by shaft coupling (8.2), the described body of roll (8.4) two ends are fixedly mounted on roller-way framework by bearing support (8.3) respectively, the body of roll (8.4) is hollow tubular, the fore side spindle nose of the body of roll (8.4) is communicated with steam line (8.6) by swivel joint (8.5), for import cooling gas in the body of roll (8.4), the sidewall of the body of roll (8.4) is distributed with spray orifice (8.8), be used for deriving cooling gas, air cooling mechanism (2) also comprises cooling spray pipe, for spraying cooling gas at course of conveying to steel plate (1), described Gun Leng mechanism (3) comprises some water-cooled conveying rollers, for carrying out heat exchange at course of conveying and steel plate (1).
2. fast cooling device after heat treatment for medium plate stove stove according to claim 1, is characterized in that: described cooling spray pipe comprises some upper cooling spray pipes (9) and/or lower cooling spray pipe (10); Described upper cooling spray pipe (9) is arranged at roller-way top, and described lower cooling spray pipe (10) is arranged between the adjacent rollers of roller-way.
3. fast cooling device after heat treatment for medium plate stove stove according to claim 1, is characterized in that: in the described body of roll (8.4), be provided with taper inner tube (8.7), the vertex of a cone of described taper inner tube (8.7) is positioned at the fore side of the body of roll (8.4).
4. fast cooling device after heat treatment for medium plate stove stove according to claim 1 and 2, it is characterized in that: described Gun Leng mechanism (3) comprises upper water-cooled conveying roller (12) and the lower water-cooled conveying roller (11) of some positioned opposite every pair of spacing and steel plate (1) consistency of thickness of going up water-cooled conveying roller (12) and lower water-cooled conveying roller (11).
5. fast cooling device after heat treatment for medium plate stove stove according to claim 1 and 2, is characterized in that: between described heat treatment furnace (4) and air cooling mechanism (2), be provided with hot metal detector (5).
6. fast cooling device after heat treatment for medium plate stove stove according to claim 1 and 2, it is characterized in that: between He Gunleng mechanism of described air cooling mechanism (2) (3), be provided with the first cold/hot metal detector (6), Gun Leng mechanism (3) end is provided with the second cold/hot metal detector (7).
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| CN201210065593.0A CN102586565B (en) | 2012-03-14 | 2012-03-14 | Rapid cooling method and device after medium and thick plate heat treatment furnace |
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| CN201210065593.0A CN102586565B (en) | 2012-03-14 | 2012-03-14 | Rapid cooling method and device after medium and thick plate heat treatment furnace |
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| CN103836981B (en) * | 2012-11-26 | 2015-10-28 | 江苏华东炉业有限公司 | Cooling bench |
| KR101665294B1 (en) * | 2016-05-17 | 2016-10-13 | (주)대코 | Continous heating device for coil springs and heating method for coil springs by using this device |
| CN108130407A (en) * | 2017-12-25 | 2018-06-08 | 南京钢铁股份有限公司 | A kind of double cloth production cost efficiency method of non-oxidation roller hearth heat-treated furnace |
| CN114407133A (en) * | 2021-12-24 | 2022-04-29 | 安徽格林开思茂光电科技股份有限公司 | Double faced adhesive tape cutting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285114A (en) * | 2007-04-12 | 2008-10-15 | 宝山钢铁股份有限公司 | Cooling method of high strength band steel and device |
| CN202047093U (en) * | 2011-03-16 | 2011-11-23 | 宝山钢铁股份有限公司 | Air cooling furnace roller at high temperature furnace section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11236622A (en) * | 1998-02-25 | 1999-08-31 | Nkk Corp | Method for cooling steel strip in continuous annealing furnace |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285114A (en) * | 2007-04-12 | 2008-10-15 | 宝山钢铁股份有限公司 | Cooling method of high strength band steel and device |
| CN202047093U (en) * | 2011-03-16 | 2011-11-23 | 宝山钢铁股份有限公司 | Air cooling furnace roller at high temperature furnace section |
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| JP特开平11-236622A 1999.08.31 |
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Address after: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: WISDRI (WUHAN) THERMAL INDUSTRY Co.,Ltd. Address before: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province Patentee before: WISDRI (WUHAN) WISFUR THERMAL TECHNOLOGY CO.,LTD. |
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Address after: 430223 No. 33 University Park Road, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: WISDRI (WUHAN) WISFUR THERMAL TECHNOLOGY CO.,LTD. Address before: 430223 No. 33, University Garden Road, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: WISDRI (WUHAN) WIS INDUSTRIAL FURNACE Co.,Ltd. |