CN201250260Y - Sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section - Google Patents
Sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section Download PDFInfo
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- CN201250260Y CN201250260Y CNU2008201522634U CN200820152263U CN201250260Y CN 201250260 Y CN201250260 Y CN 201250260Y CN U2008201522634 U CNU2008201522634 U CN U2008201522634U CN 200820152263 U CN200820152263 U CN 200820152263U CN 201250260 Y CN201250260 Y CN 201250260Y
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Abstract
The utility model discloses a sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section, which comprises at least one sealing passage, wherein a pair of gas sealing devices and a pair of non-contact sealing rollers rotated on same direction with a strip steel are installed in the sealing channel in turn. The sealing device can completely separate a continuous annealing furnace slow cooling section and a water quenching cooling section, strip steel corrosion and equipment corrosion generated by water vapor which enter the annealing furnace slow cooling section are avoided, simultaneously, aerosol and the water vapor which are escaped into the sealing channel can be removed in time simultaneously, thereby, the sealing device is beneficial for even cooling of water quenching and improving the surface quality of the strip steel, and the sealing device has particularly good sealing effect to unit which adopts water quenching and in particular a cold water quenching method to produce super-strength steel.
Description
Technical field
The utility model belongs to cold rolled continuous annealing heat treatment technics field, relates in particular to a kind of tightness system that is used for annealing furnace.
Background technology
In order to obtain the high-quality band steel that performance is even, surface quality is good, continuous annealing has replaced most of cover annealing.Handle in the band steel process in continuous annealing, the cooling of band steel, particularly cooling is the key of producing phase transformation high-strength steel such as dual phase steel, martensitic steel fast.At present, the method for rapid cooling that the continuous annealing unit is commonly used is common jet cooling, high speed jet cooling, the jet cooling of high hydrogen, the jet cooling of the high hydrogen of high speed, roller is cold, roller is cold+the gentle fog cooling of jet cooling, and the highest shrend cooling (comprising that cold water is quenched and hot water is quenched) of speed of cooling, particularly cold water is quenched and is used lessly, and at present domestic also not building up in the fast cold section company that adopts cold water to quench of continuous annealing moved back unit.This mainly is because band steel speed of cooling is too fast when adopting cold water to quench, and is difficult to reach even cooling zone steel, causes the non-constant of belt plate shape, and is with the temperature after molten steel is quenched effectively to control, and is unfavorable for producing products such as TRIP steel.In addition, continuous annealing is adopted shrend for fast cold section, when particularly cold water is quenched, in quenching process, the band molten steel can produce a large amount of aerosol and water vapour, enter the slow cooling section or even the soaking zone of continuous annealing furnace easily, cause the belt steel surface oxidation, and quicken the corrosion of equipment in the continuous annealing furnace.Therefore, adopt shrend, when particularly cold water is quenched, must between continuous annealing furnace slow cooling section and shrend rapid chilling section, seal closely.
Japanese patent application publication No. is that JP56072128A has provided vapor seal method between final water-cooled section of a kind of continuous annealing furnace and the jet cooling section (steel is jet to be cooled to about 300 ℃ being with), this method adopts a pair of sealed roller earlier along band steel traffic direction, a pair of gas-tight sealing is adopted in the back, to sealing between final water-cooled section of continuous annealing furnace and the jet cooling section, prevent that water vapour from entering into jet cooling section and causing the corrosion of band steel.This patent is also pointed out, if gas-tight sealing adopts NH
3Gas seals, and it is not oxidized to guarantee to be with steel.This patented method has the better seal effect for the water vapour that the lower band steel of temperature (about 300 ℃) shrend cooling is produced, but for thermal zone steel, particularly a large amount of water vapour quenching and produced of the band molten steel about 700 ℃ are difficult to the sealing effectiveness that reaches good.
Japanese patent application publication No. is a kind of tightness system that JP11350044A has provided continuous heat treating furnace, and as shown in Figure 1, wherein 21,22 is the heat resistant and wear resistant material layer; 41,42 is cooling room; 61,62 are the additional pipeline of water coolant; This device is mainly by 11,12 compositions of a pair of rotary seal roller, and the sealing roller is along the tight contact zones steel 51 of strip width direction, and with wear-resisting, resistant to elevated temperatures plasticity barrier film 31,32 closely contacts, this device cooperates furnace pressure control, can reach the better seal effect.But because sealed roller contacts with the band steel, plate shape and surface quality to the band steel require height, and produce defectives such as scuffing, roll marks at belt steel surface easily, are easy to adhere to belt steel surface by the high-abrasive material under the mill simultaneously, influence quality product, therefore seldom be used.
At present, the sealing method that the continuous annealing furnace entrance and exit is commonly used is simple sealed roller sealing and nitrogen-sealed, the band steel that the sealing method directly applies to about 700 ℃ directly carries out shrend, be difficult to the sealing effectiveness that reaches good, and when the aerosol of shrend section and water vapour remover break down, can't stop aerosol and water vapour to enter the annealing furnace slow cooling section by seal section, be easy to cause the corrosion of band steel corrosion and slow cooling section annealing furnace equipment, when entering the slow cooling section, even the water vapour of soaking zone is when too much, also must carry out baker to annealing furnace handles, can cause bigger financial loss to production, and the acceleration corrosion of equipment is easy to produce a large amount of defectives at belt steel surface in the stove.
Summary of the invention
The purpose of this utility model provides a kind of tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend, the atmosphere of fast cold section of continuous annealing furnace slow cooling section and shrend can be separated fully, a large amount of water vapour of being produced enter into to connect and move back the stove slow cooling section and cause unnecessary band steel corrosion and the corrosion of annealing furnace equipment thereby the band molten steel about avoiding up to 700 ℃ is quenched, and the aerosol and the water vapour that escape in the seal channel in time can be got rid of, thereby help improving the homogeneity of shrend and the surface quality of band steel.In addition, when the aerosol of shrend section and water vapour remover break down, also the aerosol and the water vapour that enter in the tightness system in time can be got rid of, thereby be stoped aerosol and water vapour to enter the annealing furnace slow cooling section by seal section, minimizing equipment and production loss.
The technical solution of the utility model is as follows: between continuous annealing furnace slow cooling section and shrend cooling section seal channel is set, and seal channel is divided into first seal section and second seal section along band steel traffic direction, and each seal section all is made up of a pair of nitrogen-sealed air knife and a pair of non-contacting seal roller arranged along band steel traffic direction.The nitrogen flow of above-mentioned nitrogen-sealed air knife can be regulated control.Like this, can regulate continuous annealing furnace slow cooling section furnace pressure, the nitrogen flow of sealing air knife and the gaseous tension of shrend section, thereby reach sealing effectiveness according to the measuring result of continuous annealing furnace slow cooling section, first seal section and the second seal section furnace pressure.Above-mentioned non-contacting seal roller all is the drive roll of motor transmission, in process of production, rotation always, even compressor emergency shutdown, the sealing roller also keeps low speed rotation (promptly creeping).For the ease of wearing the smoothly logical plate of band and unusual plate shape band steel, the non-contacting seal roller can be opened fast.In order to reduce the corrosion of aerosol and water vapour to the band steel, also for fear of aerosol and water vapour prematurely the contact zones steel cause band steel inhomogeneous cooling, all be provided with gas (comprising aerosol and water vapour) air draft pipe at first seal section and second seal section, the gas of seal section is extracted out together with aerosol and water vapour, after condensation, be rejected to outside the factory building, aerosol and water vapour through condensation flow into aqua storage tank through diversion trench, so that get rid of.It is pointed out that the shrend section also is provided with aerosol and water vapour remover, the section of shrend simultaneously will be kept negative pressure, and like this, the aerosol and the water vapour that enter seal section will significantly reduce.Sealing method of the application of the invention and device thereof can separate the atmosphere of continuous annealing furnace slow cooling section and shrend cooling section fully, thereby can reduce the corrosion of band steel and annealing furnace equipment, also can improve the even cooling power of shrend section strip steel simultaneously.
The purpose of this utility model is achieved in that a kind of tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend, comprise at least one seal channel, a pair of gas-tight sealing and a pair of and homodromal noncontact sealed roller of band steel are housed in it successively.
Preferably, described seal channel is two, interconnects along band steel traffic direction.
Preferably, also comprise a vacuum fan, it is connected with seal channel.
Preferably, described vacuum fan is connected by a pump-line with first seal channel, and described pipeline is provided with a baffle plate, and this baffle plate is connected with a baffle plate variable valve; Described vacuum fan is connected by a pump-line with second seal channel, and this pump-line is downward-sloping, its angle 〉=2 °, and the first seal channel pump-line is connected with the second seal channel pump-line; Also comprise a condenser, be installed in being communicated with between place and the vacuum fan of the first seal channel pump-line and the second seal channel pump-line, a cooling water control valve is housed on the condenser, the pipeline between condenser and the vacuum fan is inclined upwardly; One aqua storage tank is connected by a thrust-augmenting nozzle with condenser, and the outlet of this thrust-augmenting nozzle is positioned under the aqua storage tank liquid level; One electromagnetic shut-off valve and a level transmitter are installed on the aqua storage tank; Described level transmitter is connected with a liquid level display.
Preferably, described gas-tight sealing is a sealing air knife, and its width is the width of whole seal channel, and it is sealed gas that the sealing air knife adopts nitrogen, and is connected with a nitrogen flow variable valve.
Preferably, pressure transmitter is housed all on the described seal channel, this pressure transmitter is connected with a pressure display unit.
Preferably, the pressure range of described first seal channel is 100-150Pa, and the pressure range of second seal channel is 50-100Pa.
The utility model is owing to adopted above technical scheme, make it compared with prior art, have the following advantages and positively effect: the atmosphere of fast cold section of continuous annealing furnace slow cooling section and shrend can be separated fully, avoid water vapour to enter into connecting to move back the stove slow cooling section and cause band steel corrosion and equipment corrosion, the aerosol and the water vapour that escape in the seal channel have in time been got rid of simultaneously, thereby help the even cooling of shrend and the raising of strip surface quality, the super-high strength steel of unit produce to(for) the method that adopts shrend, particularly cold water to quench especially has good sealing effectiveness.
Description of drawings
Fig. 1 is the tightness system synoptic diagram of prior art.
Fig. 2 is a tightness system overall schematic of the present utility model.
Among the figure, 11,12 sealed rollers; 21,22 heat resistant and wear resistant material layers; 31,32 plasticity barrier films; 41,42 cooling rooms; 51 band steel; 61,62 water coolants replenish pipeline; 7 slow cooling sections; 8 first seal sections; 9 second seal sections; 10 shrend sections; 71 band steel; 72 slow cooling sections outlet band steel thermo detector; 73 deflector roll; 74 slow cooling section pressure display units; 75 slow cooling section pressure transmitters; 76 seal channels; 77 first seal sections sealing air knife nitrogen flow variable valve; 78 first seal sections sealing air knife; 79 first seal section non-contacting seal rollers; 80 first seal section pressure display units; 81 first seal section pressure transmitters; 82 first seal section pump-lines; 83 second seal sections sealing air knife nitrogen flow variable valve; 84 baffle plates; 85 baffle openings degree variable valve; 86 second seal sections sealing air knife; 87 second seal section non-contacting seal rollers; 88 second seal section pressure display units; 89 second seal section pressure transmitters; 90 second seal section pump-lines; 91 diversion trenchs; 92 condensers; 93 condenser cooling water control valves; 94 seal section vacuum fans; 95 thrust-augmenting nozzles; 96 draft tube outlets; 97 aqua storage tanks; 98 electromagnetic shut-off valve; 99 level transmitter; 100 liquid level displays; 101 water smoke eliminators; 102 shrend section vacuum fans; 103 hardening grooves; 104 hardening grooves sinking roller; 105 band steel drying units; 106 deflector roll.
Embodiment
As shown in Figure 2, be with steel 71 (as shown by arrows) successively through slow cooling section 7, the first seal sections, 8, the second seal sections 9 and shrend section 10 in the present embodiment.
One pressure transmitter 75 is housed on the slow cooling section 7, and this pressure transmitter 75 is connected with a pressure display unit 74, and aborning, the pressure of slow cooling section generally maintains more than the 150Pa.Also be provided with slow cooling section outlet band steel thermo detector 72 in the slow cooling section 7.Band steel 71 runs to first seal section 8 by a seal channel 76 straight down through deflector roll 73.
First seal section 8 comprises a pair of gas-tight sealing, and slow cooling section 7 and shrend are sealed between cold section 10 soon.Adopt a pair of sealing air knife 78 to carry out air seal in the present embodiment.The width of sealing air knife 78 is whole seal channel width, adopts nitrogen as sealed gas, and it is connected with a flow control valve 77, can regulate the flow of nitrogen-blow by this flow control valve 77.
Also comprise a pair of non-contacting seal roller 79, near sealing air knife 78 belows, with the 71 equidirectional rotations of band steel.This non-contacting seal roller 79 can be opened fast, can lead to plate smoothly so that wear the band steel of band and unusual plate shape.Lateral bottom, roller chamber at the first seal section non-contacting seal roller 79 is provided with a pump-line 82, and is provided with a pipeline tapping degree baffle plate 84 in the pump-line 82, and it is connected with baffle openings degree variable valve 85, can control the opening degree of baffle plate 84.
Also comprise a pressure transmitter 81, be installed on first seal section 8 that this pressure transmitter 81 is connected with a pressure display unit 80.
Roller chamber side bottom at the second seal section non-contacting seal roller 87 is provided with a pump-line 90, this extraction pipeline 90 communicates with the pump-line 82 of first seal section, and downward-sloping, is provided with diversion trench 91 in its bottom, its angle 〉=2 ° are used for the water of condensation of gas is derived.
Also comprise a vacuum fan 94, be used for extracting aerosol in the seal channel and water vapour out eliminating.It is connected by pump- line 82,90 respectively with seal channel.One condenser 92 is installed in being communicated with between place and the vacuum fan 94 of pump-line 82 and pump-line 90, and a cooling water control valve 93 is housed on the condenser, and the gas in the pump-line 90 is rejected to outside the factory building by vacuum fan 94 after condenser 92 condensations.Pipeline between condenser 92 and the vacuum fan 94 is inclined upwardly, and condensed water is refluxed.
One aqua storage tank 97 is connected by a thrust-augmenting nozzle 95 with condenser 92, and the outlet 96 of this thrust-augmenting nozzle must be immersed under the liquid level of aqua storage tank 97 when producing, in order to avoid influence the exhausting effect of seal section vacuum fan 94.One electromagnetic shut-off valve 98 and a level transmitter 99 are installed on the aqua storage tank 97, and described level transmitter 99 is connected with a liquid level display 100, controls the liquid level of aqua storage tank 97 in the present embodiment by the switch of 2 electromagnetic shut-off valve 98.
The pressure-controlling process of present embodiment is as follows: in process of production, detected result according to pressure transmitter, control connects the furnace pressure that moves back stove slow cooling section 7 respectively, the nitrogen flow of first seal section 8 and second seal section, 9 sealing air knives, the baffle opening of first seal section, 8 pump-lines, make the pressure of slow cooling section 7 greater than the pressure of first seal section 8, and the pressure of first seal section 8 also is greater than the pressure of second seal section 9, the pressure of second seal section 9 is greater than the pressure of fast cold section 10 of shrend.Its concrete span is:
The pressure of slow cooling section 7 maintains more than the 150Pa, and the pressure of seal channel first seal section 8 maintains between 100～150Pa, and the pressure of seal channel second seal section 9 maintains between 50～100Pa, and shrend is kept negative pressure for fast cold section 10 all the time.
And, shrend section 10 is constantly eliminated the water vapour that shrend produced by shrend section vacuum fan 102 and water smoke eliminator 101, and keep the minimum negative pressure of shrend section 10 all the time, thereby make the continuous annealing furnace slow cooling section 7 and the atmosphere of shrend cooling section 10 separate fully, the water vapour of avoiding shrend to produce enters into to connect and moves back stove slow cooling section 7 and cause unnecessary band steel corrosion and the corrosion of annealing furnace equipment.Among Fig. 2,103 is the hardening groove; 104 are hardening groove sinking roller; 105 are band steel drying unit; 106 is deflector roll.
Claims (7)
1. tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend is characterized in that: comprise at least one seal channel, be equipped with successively in it a pair of gas-tight sealing and a pair of be with the homodromal noncontact sealed roller of steel.
2. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 1, it is characterized in that: described seal channel is two, interconnects along band steel traffic direction.
3. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 2, it is characterized in that: also comprise a vacuum fan (94), it is connected with seal channel (8,9).
4. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 3 is characterized in that:
Described vacuum fan (94) is connected by a pump-line (82) with first seal channel (8), and described pipeline (82) is provided with a baffle plate (84), and this baffle plate (84) is connected with a baffle plate variable valve (85);
Described vacuum fan (94) is connected by a pump-line (90) with second seal channel (9), and this pump-line (90) is downward-sloping, its angle 〉=2 °, and the first seal channel pump-line (82) is connected with the second seal channel pump-line (90);
Also comprise a condenser (92), be installed in being communicated with between place and the vacuum fan (94) of the first seal channel pump-line (82) and the second seal channel pump-line (90), one cooling water control valve (93) is housed on the condenser (92), and the pipeline between condenser (92) and the vacuum fan (94) is inclined upwardly; One aqua storage tank (97) is connected by a thrust-augmenting nozzle (95) with condenser (92), and the outlet of this thrust-augmenting nozzle (96) is positioned under aqua storage tank (97) liquid level; One electromagnetic shut-off valve (98) and a level transmitter (99) are installed in (97) on the aqua storage tank; Described level transmitter (99) is connected with a liquid level display (100).
5. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 4, it is characterized in that: described gas-tight sealing is a sealing air knife (78,86), its width is the width of whole seal channel, sealing air knife (78,86) employing nitrogen is sealed gas, and is connected with a nitrogen flow variable valve (77,83).
6. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 5, it is characterized in that: pressure transmitter (81,89) all is housed on the described seal channel (8,9), and this pressure transmitter (81,89) is connected with a pressure display unit (80,88).
7. the tightness system that is used between fast cold section of the jet slow cooling section of annealing furnace and the shrend as claimed in claim 6, it is characterized in that: the pressure range of described first seal channel (8) is 100-150Pa, the pressure range of second seal channel (9) is 50-100Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201522634U CN201250260Y (en) | 2008-08-22 | 2008-08-22 | Sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201522634U CN201250260Y (en) | 2008-08-22 | 2008-08-22 | Sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section |
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| CN201250260Y true CN201250260Y (en) | 2009-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201522634U Expired - Lifetime CN201250260Y (en) | 2008-08-22 | 2008-08-22 | Sealing device used between annealing furnace air injection slow cooling section and water quenching quick cooling section |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424907A (en) * | 2011-12-24 | 2012-04-25 | 安吉长虹制链有限公司 | Heat treatment system |
| CN102605163A (en) * | 2012-01-10 | 2012-07-25 | 山西太钢不锈钢股份有限公司 | Drying method of continuous annealing furnace |
| CN102747213A (en) * | 2011-04-22 | 2012-10-24 | 宝山钢铁股份有限公司 | Cooling method for continuous heat treatment of high-strength steel |
| CN103380346A (en) * | 2011-02-04 | 2013-10-30 | 安德里茨技术资产管理有限公司 | Method for controlling a protective gas atmosphere in a protective gas chamber for the treatment of a metal strip |
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| CN113293279A (en) * | 2021-05-31 | 2021-08-24 | 马鞍山钢铁股份有限公司 | Continuous annealing furnace outlet section structure and strip steel discharging and cooling process |
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2008
- 2008-08-22 CN CNU2008201522634U patent/CN201250260Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103380346A (en) * | 2011-02-04 | 2013-10-30 | 安德里茨技术资产管理有限公司 | Method for controlling a protective gas atmosphere in a protective gas chamber for the treatment of a metal strip |
| CN103380346B (en) * | 2011-02-04 | 2015-08-05 | 安德里茨技术资产管理有限公司 | For the treatment of the control method of protective gas atmosphere in the protective gas room of metal band |
| CN102747213A (en) * | 2011-04-22 | 2012-10-24 | 宝山钢铁股份有限公司 | Cooling method for continuous heat treatment of high-strength steel |
| CN102747213B (en) * | 2011-04-22 | 2014-04-30 | 宝山钢铁股份有限公司 | Cooling method for continuous heat treatment of high-strength steel |
| CN102424907A (en) * | 2011-12-24 | 2012-04-25 | 安吉长虹制链有限公司 | Heat treatment system |
| CN102605163A (en) * | 2012-01-10 | 2012-07-25 | 山西太钢不锈钢股份有限公司 | Drying method of continuous annealing furnace |
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| US9957585B2 (en) | 2013-02-25 | 2018-05-01 | Jfe Steel Corporation | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| CN113293279A (en) * | 2021-05-31 | 2021-08-24 | 马鞍山钢铁股份有限公司 | Continuous annealing furnace outlet section structure and strip steel discharging and cooling process |
| CN113293279B (en) * | 2021-05-31 | 2023-03-10 | 马鞍山钢铁股份有限公司 | Continuous annealing furnace outlet section structure and strip steel discharging cooling process |
| CN114317902A (en) * | 2021-12-27 | 2022-04-12 | 江苏力博士机械股份有限公司 | Piston heat treatment equipment and process for breaking hammer |
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Granted publication date: 20090603 |