CN102586565A - 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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- CN102586565A CN102586565A CN2012100655930A CN201210065593A CN102586565A CN 102586565 A CN102586565 A CN 102586565A CN 2012100655930 A CN2012100655930 A CN 2012100655930A CN 201210065593 A CN201210065593 A CN 201210065593A CN 102586565 A CN102586565 A CN 102586565A
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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 thermal treatment field of sheet material, refer to fast cooling method and fast cooling device behind a kind of plate heat treatment furnace stove particularly.
Background technology
Compare characteristics 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 the hot rolling Wide and Thick Slab.Coils of hot-rolled steel crosscut plate heat-treatment lines aims to provide the plate material of above-mentioned high-performance, thin specification, high added value, so the equipment on the heat-treatment lines all need satisfy the demand that fast pace is produced.Cooling behind the existing heat treatment furnace is generally accomplished by cold bed equipment; Cold bed equipment is divided into five kinds of forms such as stepping beam type cold bed, plate wheel formula cold bed, the board-like cold bed of chain sublattice, rolling claw formula cold bed and year chain type cooling bed; The cold bed of which kind of form all need be accomplished the process of material loading, cooling and discharging; Each process all needs peculiar equipment and mechanism to accomplish, and process of cooling adopts is the mode of naturally cooling, so the cold bed equipment of traditional sense and be not suitable for fast pace production needs.
In addition, because cold bed has adopted the naturally cooling mode, so be the principal element of the final cooling temperature of decision steel plate cooling time.Satisfy the high production capacity of heat-treatment lines, allegro needs; Cold bed just must have enough big area so; So that large-tonnage product has competent cooling time, this can increase facility investment undoubtedly, and needs bigger plant area (when particularly width is striden in thermal treatment).
Therefore; For adapting to the demand that coils of hot-rolled steel crosscut plate heat-treatment lines fast pace is produced; Solve the existing type of cooling and the drawback of equipment on the type heat-treatment lines, need fast cooling method and device behind a kind of heat treatment furnace stove of design badly, to realize the cooling of heat-treated steel plate.
Summary of the invention
Technical problem to be solved by this invention just provides fast cooling method and fast cooling device behind a kind of plate heat treatment furnace stove, can realize the cooling of steel plate in course of conveying, significantly reduces cooling time.
For solving the problems of the technologies described above; Fast cooling method behind a kind of plate heat treatment furnace stove provided by the invention; Be in the course of conveying of steel plate after heat treatment furnace is handled; At first adopt the gas injection method that steel plate is tentatively lowered the temperature, adopt the contact type of cooling to make the further method of cooling of steel plate then.
In the technique scheme, said gas injection method makes the temperature of steel plate reduce to 200 ~ 450 ℃.
In the technique scheme, the said contact type of cooling makes the temperature of steel plate reduce to 80 ~ 200 ℃.
Fast cooling device behind a kind of plate heat treatment furnace stove provided by the invention comprises the air cooling mechanism and the cold mechanism of roller that are set in turn in behind the heat treatment furnace; Said air cooling mechanism comprises the roller-way that is used to carry steel plate, and air cooling mechanism also comprises cooling spray pipe, is used at course of conveying to steel plate shower cooling gas; The cold mechanism of said roller comprises some water-cooled conveying rollers, is used for carrying out heat exchange at course of conveying and steel plate.
In the technique scheme, said cooling spray pipe comprises some cooling spray pipe and/or following cooling spray pipes gone up; The said cooling spray pipe of going up is arranged at the roller-way top, and said cooling spray pipe down is arranged between the adjacent rollers of roller-way.
In the technique scheme, in the said air cooling mechanism, being used to carry the roller-way of steel plate is the air cooling conveying roller; Said air cooling conveying roller comprises driving motor, shaft coupling, chock and the body of roll; Said driving motor links to each other with the back side of the body of roll through shaft coupling, and said body of roll two ends are fixedly mounted on the roller-way framework through chock respectively, and the body of roll is hollow tubular; The fore side spindle nose of the body of roll is communicated with air-supply duct through swivel joint; Be used in the body of roll, importing cooling gas, the sidewall of the body of roll has spray orifice, is used to derive cooling gas.
Further, be provided with pipe in the taper in the said body of roll, the vertex of a cone of pipe is positioned at the fore side of the body of roll in the said taper.
In the technique scheme, the cold mechanism of said roller comprises the last water-cooled conveying roller and following water-cooled conveying roller of some positioned opposite, every pair of spacing and steel plate consistency of thickness of going up water-cooled conveying roller and following water-cooled conveying roller.
In the technique scheme, be provided with hot metal detector between said heat treatment furnace and the air cooling mechanism.
In the technique scheme, be provided with the first cold and hot metal detector between said air cooling mechanism and the cold mechanism of roller, the cold mechanism of roller end is provided with the second cold and hot metal detector.
Beneficial effect of the present invention is:
1) compare with the cold bed equipment and the type of cooling thereof, this fast cooling device and method need not utility appliance and processes such as material loading, discharging, have realized the cooling of steel plate in course of conveying, have both reduced equipment cost, have also improved evaporation efficiency;
2) compare with cold bed naturally cooling mode, the present invention utilizes air cooling winding-up, the cooling of cooling contact, and its speed of cooling is fast, and then has improved the unit production capacity;
3) through the cooling of air cooling winding-up and contact, this process is reasonable in design, speed of cooling is moderate successively for steel plate, and the tissue and the plate shape of steel plate had no adverse effects;
4) because this fast cooling device is the extension of heat treatment furnace length direction,, help the sleeve configuration plant layout so the width of heat-treatment lines is not had particular requirement.
Description of drawings
Fig. 1 is the structural representation of an embodiment of fast cooling device of the present invention.
Structural representation when Fig. 2 is in the cold mechanism of roller working order for Fig. 1 device.
Fig. 3 is the A-A sectional view of Fig. 1.
Fig. 4 is the B-B sectional view of Fig. 2.
Among the figure: 1-steel plate, 2-air cooling mechanism, the cold mechanism of 3-roller; 4-heat treatment furnace, 5-hot metal detector, 6-the first cold and hot metal detector; 7-the second cold and hot metal detector, 8-air cooling conveying roller (wherein: pipe, 8.8-spray orifice in 8.1-driving motor, 8.2-shaft coupling, 8.3-chock, 8.4-body of roll, 8.5-swivel joint, 8.6-air-supply duct, the 8.7-taper), 9-upward cooling spray pipes; 10-following cooling spray pipe; 11-following water-cooled conveying roller, 12-upward water-cooled conveying rollers, 13-conveying roller.
Embodiment
Below in conjunction with accompanying drawing specific embodiment of the present invention is done further to describe in detail.
Fast cooling method behind the plate heat treatment furnace stove of present embodiment; Be in the course of conveying of steel plate after heat treatment furnace is handled; At first adopt the gas injection method to make steel plate tentatively be cooled to about 200 ~ 450 ℃, adopt the contact type of cooling to make steel plate further be cooled to about 80 ~ 200 ℃ method then.Adopt this method of cooling, not only can shorten the cooling time of steel plate 1 greatly, enhance productivity, and reasonably rate of cooling has no adverse effects to steel plate 1 tissue and plate shape.
Here with a case history above-mentioned fast cooling method is done detailed explanation: the steel plate 1 in this instance is that thickness is the plate of 10mm, about 900 ℃ of its tapping temperature, and the transhipment temperature is 150 ℃, envrionment temperature is 25 ℃.As adopt traditional cold bed mode, and being cooled to 150 ℃ from 900 ℃ needs 916s approximately, considers material loading, discharging each about 45s opening time, and whole process of cooling required time is asked 1006s, i.e. 16.8min; When adopting the inventive method, carry out the cooling of gas injection method, be cooled to 300 ℃ of about 180s of needs from 900 ℃ with the speed of 3.3 ℃/s; Carry out the cooling of the contact type of cooling with 30 ℃/s speed again; Be cooled to 150 ℃ of needs 5s from 300 ℃, come to 185s, i.e. 3.1min.And the mode of slow cooling between the high-temperature zone, low-temperature range chilling can not make steel plate produce martensite or bainite transformation, and then changes the steel plate weave construction; Can not produce bigger structural stress and thermal stress yet, and then influence plate shape.
As depicted in figs. 1 and 2, fast cooling device behind a kind of plate heat treatment furnace stove of the present invention comprises the air cooling mechanism 2 and the cold mechanism 3 of roller that are set in turn in behind the heat treatment furnace 4.Air cooling mechanism 2 comprises the roller-way that is used to carry steel plate 1, also comprises cooling spray pipe, is used at course of conveying to steel plate 1 shower cooling gas.The cold mechanism 3 of roller comprises some water-cooled conveying rollers, is used 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 air cooling mechanism 2 and the cold mechanism 3 of roller, be provided with the first cold and hot metal detector 6,3 ends then are provided with the second cold and hot metal detector 7 in the cold mechanism of roller.
In the air cooling mechanism 2 of present embodiment, be used to carry the roller-way of steel plate 1 to 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, chock 8.3 and the body of roll 8.4; Driving motor 8.1 links to each other with the back side of the body of roll 8.4 through shaft coupling 8.2, and the body of roll 8.4 two ends are fixedly mounted on the roller-way framework through chock 8.3 respectively, and the body of roll 8.4 is hollow tubular; Its fore side spindle nose is communicated with air-supply duct 8.6 through swivel joint 8.5; Be used in the body of roll 8.4, importing cooling gas, the sidewall of the body of roll 8.4 has spray orifice 8.8, is used to derive cooling gas.In addition; Also be provided with pipe 8.7 in the taper in the body of roll 8.4; The vertex of a cone of pipe 8.7 is positioned at the fore side of the body of roll 8.4 in this taper; Its existence makes the body of roll 8.4 internal spaces diminished gradually to back side by fore side, and then guarantees to be evenly arranged in the body of roll 8.4 from the cooling gas of fore side, and sprays to steel plate 1 equably to realize cooling.
In the air cooling mechanism 2 of present embodiment, cooling spray pipe comprises some cooling spray pipe 9 and following cooling spray pipes 10 gone up.Following cooling spray pipe 10 is arranged between the adjacent air cooling conveying roller 8, last cooling spray pipe 9 be arranged at roller-way top, with following cooling spray pipe 10 positioned opposite.
The cold mechanism 3 of the roller of present embodiment comprises the last water-cooled conveying roller 12 and following water-cooled conveying roller 11 of six pairs of positioned opposite, and the height of last 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: after steel plate 1 is accomplished heat tracing, get into continuously and through this fast cooling device from thermal treatment stove 4 with certain speed (like 20m/min).In the process that steel plate 1 is advanced, at 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 through the time its temperature reduced to about 300 ℃; After the first cold and hot metal detector 6 between air-cooling apparatus 2 and the roller device for cooling 3 detects signal; The waterworks of roller device for cooling 3 is started working; When steel plate 1 was interval through this, the heat of steel plate 1 was passed to water coolant through the roller wall of upper and lower water-cooled conveying roller 12,11 and is reduced to about 150 ℃; When steel plate 1 afterbody left the first cold and hot metal detector 6, air-cooling apparatus 2 quit work, and when steel plate 1 afterbody left the second cold and 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 successively through air cooling winding-up and contact cooling, to realize the cooling of steel plate 1 in course of conveying.So its protection domain is not limited to the foregoing description.Obviously; Those skilled in the art can carry out various changes and distortion and do 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 among the embodiment 8 and upper and lower cooling spray pipe 9,10 combinations; Adopt separately air cooling conveying roller 8 also can realize the air cooling winding-up cooling of steel plate 1 in course of conveying, air cooling mechanism 2 also can adopt the combination of common conveying roller 13 and cooling spray pipe, perhaps other existing structure etc.; The spacing of the structure of the cold mechanism 3 of roller and water-cooled conveying roller 12,11 thereof, number also can be adjusted according to steel plate 1 specification; The transmitter that is used to detect steel plate 1 position also is not limited to the combination of above-mentioned hot metal detector 5, first cold and hot metal detector 6, the second cold and hot metal detector 7, just can realize technique effect of the present invention as long as can monitor out steel plate 1 position so that the signal that triggers and close air cooling mechanism 2, the cold mechanism 3 of roller to be provided; It is said that the rate of cooling of the gas injection method and the contact type of cooling also is not limited to embodiment; As long as guarantee gas injection method (steel plate 1 is in the comparatively high temps interval) slow cooling, the contact type of cooling (steel plate 1 is in the lesser temps interval) chilling, change and to wait with weave construction and the plate shape of avoiding sheet material.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and is out of shape interior.
Claims (10)
1. fast cooling method behind the plate heat treatment furnace stove; It is characterized in that: it is in the course of conveying of steel plate after heat treatment furnace is handled; At first adopt the gas injection method that steel plate is tentatively lowered the temperature, adopt the contact type of cooling to make the further method of cooling of steel plate then.
2. fast cooling method behind the plate heat treatment furnace stove according to claim 1 is characterized in that: said gas injection method makes the temperature of steel plate reduce to 200 ~ 450 ℃.
3. fast cooling method behind the plate heat treatment furnace stove according to claim 1 and 2 is characterized in that: the said contact type of cooling makes the temperature of steel plate reduce to 80 ~ 200 ℃.
4. fast cooling device behind the plate heat treatment furnace stove is characterized in that: it comprises air cooling mechanism (2) and the cold mechanism of roller (3) that is set in turn in behind the heat treatment furnace (4); Said air cooling mechanism (2) comprises the roller-way that is used to carry steel plate (1), and air cooling mechanism (2) also comprises cooling spray pipe, is used at course of conveying to steel plate (1) shower cooling gas; The cold mechanism of said roller (3) comprises some water-cooled conveying rollers, is used for carrying out heat exchange at course of conveying and steel plate (1).
5. fast cooling device behind the plate heat treatment furnace stove according to claim 4 is characterized in that: said cooling spray pipe comprises some cooling spray pipe (9) and/or following cooling spray pipes (10) gone up; The said cooling spray pipe (9) of going up is arranged at the roller-way top, and said cooling spray pipe (10) down is arranged between the adjacent rollers of roller-way.
6. according to fast cooling device behind claim 4 or the 5 described plate heat treatment furnace stoves, it is characterized in that: in the said air cooling mechanism (2), being used to carry the roller-way of steel plate (1) is air cooling conveying roller (8); Said air cooling conveying roller (8) comprises driving motor (8.1), shaft coupling (8.2), chock (8.3) and the body of roll (8.4); Said driving motor (8.1) links to each other with the back side of the body of roll (8.4) through shaft coupling (8.2); The said body of roll (8.4) two ends are fixedly mounted on the roller-way framework through chock (8.3) respectively; The body of roll (8.4) is hollow tubular, and the fore side spindle nose of the body of roll (8.4) is communicated with air-supply duct (8.6) through swivel joint (8.5), is used in the body of roll (8.4), importing cooling gas; The sidewall of the body of roll (8.4) has spray orifice (8.8), is used to derive cooling gas.
7. fast cooling device behind the plate heat treatment furnace stove according to claim 6 is characterized in that: be provided with pipe (8.7) in the taper in the said body of roll (8.4), the vertex of a cone of pipe (8.7) is positioned at the fore side of the body of roll (8.4) in the said taper.
8. according to fast cooling device behind claim 4 or the 5 described plate heat treatment furnace stoves; It is characterized in that: the cold mechanism of said roller (3) comprises the last water-cooled conveying roller (12) and the following 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 following water-cooled conveying roller (11).
9. according to fast cooling device behind claim 4 or the 5 described plate heat treatment furnace stoves, it is characterized in that: be provided with hot metal detector (5) between said heat treatment furnace (4) and the air cooling mechanism (2).
10. according to fast cooling device behind claim 4 or the 5 described plate heat treatment furnace stoves; It is characterized in that: be provided with the first cold and hot metal detector (6) between said air cooling mechanism (2) and the cold mechanism of roller (3), the cold mechanism of roller (3) end is provided with the second cold and hot metal detector (7).
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN102586565A true CN102586565A (en) | 2012-07-18 |
| CN102586565B CN102586565B (en) | 2014-04-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836981A (en) * | 2012-11-26 | 2014-06-04 | 江苏华东炉业有限公司 | Cooling table |
| CN106868285A (en) * | 2016-05-17 | 2017-06-20 | 大圆应用工程公司 | Helical spring continuous heating and helical spring laser heating method |
| 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 |
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| JPH11236622A (en) * | 1998-02-25 | 1999-08-31 | Nkk Corp | Method for cooling steel strip in continuous annealing furnace |
| 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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2012
- 2012-03-14 CN CN201210065593.0A patent/CN102586565B/en active Active
Patent Citations (3)
| 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 |
| 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836981A (en) * | 2012-11-26 | 2014-06-04 | 江苏华东炉业有限公司 | Cooling table |
| CN103836981B (en) * | 2012-11-26 | 2015-10-28 | 江苏华东炉业有限公司 | Cooling bench |
| CN106868285A (en) * | 2016-05-17 | 2017-06-20 | 大圆应用工程公司 | Helical spring continuous heating and helical spring laser heating method |
| 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 |
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| CN102586565B (en) | 2014-04-02 |
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