CN105698525A - Induction heating furnace provided with half-split panel induction coils - Google Patents
Induction heating furnace provided with half-split panel induction coils Download PDFInfo
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- 230000006698 induction Effects 0.000 title claims abstract description 217
- 238000010438 heat treatment Methods 0.000 title abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 115
- 229910052802 copper Inorganic materials 0.000 claims abstract description 115
- 239000010949 copper Substances 0.000 claims abstract description 115
- 239000000463 material Substances 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 81
- 239000010959 steel Substances 0.000 abstract description 81
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 12
- 238000005096 rolling process Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 230000033764 rhythmic process Effects 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to an online induction heating technique for steel plates. An induction heating furnace provided with half-split panel induction coils comprises an upper panel induction coil set (2) and a lower panel induction coil set (6). The lower panel induction coil set is fixedly installed on an induction furnace support. The upper panel induction coil set is installed on a frame which can move up and down. A pair of panel induction coils is formed by the upper panel induction coil set and the lower panel induction coil set. A heated plate (1) passes through the space between the upper panel induction coil set and the lower panel induction coil set. Each panel induction coil comprises copper pipes (3) and a magnetic yoke (4), wherein the magnetic yoke is in an E shape, and the two working sections of a multi-turn copper pipe coil body are flatly arranged in two inner grooves of the E shape of the magnetic yoke correspondingly; the copper pipe arranged in the front groove of the E shape of the magnetic yoke serves as the front copper pipe, and the copper pipe arranged in the rear groove of the E shape of the magnetic yoke serves as the rear copper pipe; and the direction of currents flowing through the front copper pipe is opposite to the direction of currents flowing through the rear copper pipe. When a steel plate which is severely warped appears in the production process, the upper panel induction coil set can be lifted up rapidly.
Description
Technical field
The present invention relates to a kind of online induction heating technique of steel plate, particularly relate to and there is a point induction heater for half formula flat board induction coil, it is adaptable to the thermomechanical of medium plate controls Technology。
Background technology
Progress along with science and technology, the scope of materials application is constantly expanded, people are further harsh to the requirement of material property, thermomechanical controls technique (TMCP) and the performance of material is had material impact, the production of property steel plate can be realized, high-strength steel as excellent in welding performance, Steels for High Rise Buildings and large ship steel etc., can the quality level of significant increase slab, the performance impact of slab is especially pronounced。One important feature of a new generation's TMCP technology is that the burning optimization on line process after rolling is not limited only to cooling or insulation, also can carry out the heating of certain condition in some cases。The burning optimization on line device of cut deal utilizes efficient induction heating apparatus to carry out prompt tempering, it is possible to distribution and size to carbide are controlled so that it is highly uniform, tiny is scattered on matrix, thus realizing high intensity and the high tenacity of quenched and tempered steel。
For meeting the quickly online tempering demand of cut deal, it is necessary to roller-way is installed induction heater after rolling。Due to the strip variable thickness of supplied materials, usual maximum amount of warpage is often > 30mm, and realize sensing heating and must assure that and between induction coil and strip, keep effective distance of reaction, therefore it is required that induction furnace physical ability makes height adjustment according to different thicknesss of slab。If using conventional solenoid type longitudinal magnetic field sensing heating, although design simple in construction, but actually used process is very easy to problems such as cannot moving in steel plate and coil collision, the stuck online circle of steel plate occur, and the gap of coil inner chamber cannot be adjusted according to steel plate thickness specification flexibly。
By Literature Consult and patent retrieval, US Patent No. 5495094 discloses a kind of induction heater, this induction furnace forms by being cross-linked coiling between single copper coin coil, coil inside space length cannot adjust, therefore cannot realize the steel plate heating of many thickness specification, also cannot tackle camber of sheet phenomenon。Particularly the single copper coin coil of this patent disclosure is only suitable for adopting high-frequency induction heating sheet metal, and thickness is generally at below 5mm。US Patent No. 6498328B2 and US5739506 all adopts transverse magnetic field sensing heating, and namely magnetic direction is vertical with direction, heated steel plate width face。When utilizing transverse magnetic field that monolithic steel plate is heated, although coil-span can also be adjusted according to steel plate thickness and production emergency situations, but there is heating incipient stage, the problem that electric current is assembled in steel plate front end and caused this place's temperature burning。According to splicing steel plate in steel plate front end or from the method such as beginning to warm up in the middle part of steel plate, although the problem that can solve end burning, but in actual large-scale production process, these methods do not have operability。
Summary of the invention
It is an object of the invention to provide and a kind of there is a point induction heater for half formula flat board induction coil, the induction coil of this induction heater is upper group of flat board induction coil and lower group of flat board induction coil, and heated sheet material passes through between upper and lower two groups of flat board induction coils；In production process when running into the serious steel plate of warpage, upper group of induction coil can lift rapidly, it is allowed to this steel plate by and do not affect normal production。
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that
A kind of have a point induction heater for half formula flat board induction coil, including upper group of flat board induction coil and lower group of flat board induction coil, lower group of flat board induction coil is fixedly installed on induction furnace support, upper group of flat board induction coil is installed on and can move up and down on framework, upper group of flat board induction coil is corresponding to lower group of flat board induction coil, upper group of flat board induction coil and lower group of flat board induction coil partner flat board induction coil, and heated sheet material passes through between upper and lower two groups of flat board induction coils；Described flat board induction coil is formed by multi-loop copper tube coiling。
Described upper group of flat board induction coil and the lower group of sense of current that flat board induction coil flows through are contrary, and size, phase and frequency are identical。
Described flat board induction coil includes copper pipe and yoke, yoke is E shape, two active sections of multi-loop copper tube coil are respectively placed in two inside grooves of yoke E shape flat raft and place, the copper pipe being placed in yoke E shape groove front portion is front copper pipe, the copper pipe being placed in yoke E shape groove rear portion is rear copper pipe, and it is contrary with the sense of current flowing through described rear copper pipe to flow through described front copper pipe；Heated sheet material copper pipe in the past passes through in copper pipe direction backward。
The front and back copper pipe of described upper group of flat board induction coil is positioned in approximately the same plane, and the front and back copper pipe of described lower group of flat board induction coil is positioned in approximately the same plane。
The copper pipe lower surface of described upper group of flat board induction coil is satisfied with the copper pipe upper surface distance L of described lower group of flat board induction coil: 50mm < L < 150mm。
Between front copper pipe and the rear copper pipe of described flat board induction coil homonymy, spacing d meets: 100mm < d < 400mm。
The flat raft arranging density of the rear copper pipe of described upper and lower two groups of flat board induction coils is not more than the flat raft arranging density of front copper pipe。
Described flat board induction coil has multipair, and multipair flat board induction coil interval rollgang is arranged side by side, and in the longitudinal magnetic field of adjacent two pairs of flat board induction coils formation, two magnetic directions are identical adjacent to one another。
The present invention has point induction heater of half formula flat board induction coil for steel plate rolling after-baking, the induction coil of the induction heater of the present invention is upper group of flat board induction coil and lower group of flat board induction coil, and heated sheet material passes through between upper and lower two groups of flat board induction coils。In production process, steel plate is mobile along roller way system conveying, enters the induction heater rear plate induction coil energising quickly heating of the present invention, after certain temperature retention time, steel plate moves to induction coil exit the target temperature reaching technique initialization, and meets Temperature Distribution requirement on cross section。When running into the serious steel plate of warpage, upper group of flat board induction coil can utilize mechanical shifting mechanism to lift rapidly, it is allowed to this steel plate by and do not affect normal production, upper group flat board induction coil returns origin-location subsequently, carries out the heating of next block plate。
Compared with prior art, it provides the benefit that the present invention:
(1) upper group flat board induction coil can be adjusted in real time according to camber of sheet degree, improves the product adaptation ability of equipment, is conducive to stablizing of rhythm of production。
(2) due to steel plate and upper and lower two groups of flat board induction coil spacing relative constancy, heating more stable, the efficiency of heating surface is of a relatively high, and steel plate thermal treatment quality is better, is conducive to improving product quality。
The induction heater of the present invention is used for steel plate rolling after-baking, and its device structure is simple, and technological operation easily realizes automatization, heats is better, is conducive to improving product quality, can simplify production line operation operation, improve production efficiency, save production cost, there is good application prospect。
Accompanying drawing explanation
Fig. 1 is that the present invention has a point induction heater structural representation for half formula flat board induction coil；
Fig. 2 is the embodiment of the present invention 1 schematic diagram；
Fig. 3 is induction furnace heating process heating curve figure；
Fig. 4 is the embodiment of the present invention 2 schematic diagram；
Fig. 5 is the magnetic field schematic diagram that upper and lower two groups of flat board induction coils produce；
Fig. 6 is the magnetic field schematic diagram that two groups of flat board induction coils produce up and down of embodiment 1。
In figure: 1 heated sheet material (steel plate)；Plate coil, 3 copper pipes, 4 yokes, 5 rollgangs, 6 times group plate coils are organized on 2；Copper pipe before group on 21, copper pipe after group on 22, copper pipe before 61 times groups, copper pipe after 62 times groups。Arrow shown in Fig. 1 is sheet material moving direction；In Fig. 6: X is that electric current flows to, flow out for electric current。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described。
Referring to Fig. 1, a kind of have a point induction heater for half formula flat board induction coil, including upper group of flat board induction coil 2 and lower group of flat board induction coil 6, lower group of flat board induction coil 6 is fixedly installed in induction furnace support (not shown in figure 1), upper group of flat board induction coil 2 is installed on and can move up and down in framework (not shown in figure 1), upper group of flat board induction coil 2 is corresponding to lower group of flat board induction coil 6, upper group of flat board induction coil 2 and lower group of flat board induction coil partner flat board induction coil, and heated sheet material 1 passes through between upper and lower two groups of flat board induction coils 2,6；Described flat board induction coil is formed by multi-loop copper tube 3 coiling。Described upper group of flat board induction coil 2 and the lower group of sense of current that flat board induction coil 6 flows through are contrary, and size, phase and frequency are identical。
Described flat board induction coil 2,6 includes copper pipe 3 and yoke 4, yoke 4 is E shape, two active sections of multi-loop copper tube coil 3 are respectively placed in two inside grooves of yoke E shape flat raft and place, the copper pipe 3 being placed in yoke E shape groove front portion is front copper pipe 21,61, the copper pipe 3 being placed in yoke E shape groove rear portion is rear copper pipe 22,62, and it is contrary with the sense of current flowing through described rear copper pipe to flow through described front copper pipe；Heated sheet material 1 copper pipe 21,61 in the past passes through in copper pipe 22,62 direction backward。
The front and back copper pipe 21,22 of described upper group of flat board induction coil 2 is positioned in approximately the same plane, and the front and back copper pipe 61,62 of described lower group of flat board induction coil 6 is positioned in approximately the same plane。Copper pipe 21,22 lower surface of described upper group of flat board induction coil 2 meets with copper pipe 61, the 62 upper surface distance L of described lower group of flat board induction coil 6: 50mm < L < 150mm。
Between front copper pipe and the rear copper pipe of described flat board induction coil homonymy, spacing d meets: 100mm < d < 400mm。When described spacing d is less than 100mm, it would appear that cancel out each other between two longitudinal magnetic fields that the front copper pipe of flat board induction coil homonymy and rear copper pipe produce, reduce the efficiency of heating surface；When described spacing d is more than 400mm, then part temperature drop between two longitudinal magnetic fields can be caused excessive, extend overall heat time heating time, be unsuitable for the requirement reaching programming rate。
The flat raft arranging density of the rear copper pipe 22,62 of described upper and lower two groups of flat board induction coils is not more than the flat raft arranging density of front copper pipe 21,61, referring to Fig. 2。Arrange relative to the bringing-up section solid matter of copper pipe before induction coil 21,61, the sparse arrangement of copper pipe that after induction coil, the soaking zone of copper pipe 22,62 is corresponding, by plumbers shed from the setting optimizing design, the cooperation of steel plate translational speed and induction coil heating power parameter, it is possible to the temperature of whole for induction heater heating process is controlled within the scope of technological requirement。
Described flat board induction coil 2,6 has multipair, and referring to Fig. 4, multipair flat board induction coil interval rollgang 5 is arranged side by side, and in the longitudinal magnetic field of adjacent two pairs of flat board induction coils formation, two magnetic directions are identical adjacent to one another。Needs according to rhythm of production, the flat board induction coil of the present invention 2,6 pairs can combine and use side by side, and induction coil logarithm is unrestricted according to the needs selection of rhythm of production。
The present invention has a point induction heater for half formula flat board induction coil when utilizing upper and lower two groups of flat board induction coils that steel plate is heated, and heated steel plate thickness is between 6mm～50mm。When described heated steel plate thickness is more than 50mm, then needs to expand the spacing of upper and lower two groups of flat board induction coils, cause the efficiency of heating surface to reduce, improve production cost。When described heated steel plate thickness is less than 6mm, it is similarly the guarantee efficiency of heating surface, the frequency of supply of described upper and lower two groups of flat board induction coils need to be improved, and the design frequency scope of single power supply cannot meet too high frequency requirement。
Described heated steel plate translational speed absolute value is controlled within 0.01m/s～1m/s scope by the induction heater of the present invention。In actual production process, when translational speed is more than 1m/s, for reaching target temperature, it is necessary to source nominal power excessive, beyond the scope that general manufacturing enterprise can bear, thus not there is operability。When speed is lower than 0.01m/s, then rhythm of production is too low again, it is impossible to reach capacity requirements。
The part of two groups of flat board induction coil 2,6 described heated steel plate 1 width of covering up and down of the induction heater of the present invention is arranged symmetrically with relative to plate centre line, and it is contrary all the time to be positioned at the sense of current on the upper and lower copper pipe of symmetric position, size, phase and frequency are identical。
Described upper and lower two groups of flat board induction coils 2,6 form two longitudinal magnetic fields within the scope of the three dimensions covering described heated steel plate 1, and central magnetic field direction is parallel with steel plate moving direction, and said two longitudinal magnetic field direction is contrary all the time。Referring to Fig. 5, for a certain moment, if upper and lower two groups of plate coils form a magnetic field B2 to the right on the left of induction coil, then the upper and lower two groups of plate coils in right side formation one magnetic field B1 to the left, magnetic field B1 are contrary all the time with B2 direction, magnetic field。
There is a point induction heater for half formula flat board induction coil
The present invention has point induction heater of half formula flat board induction coil for steel plate rolling after-baking。In production process, steel plate is mobile along roller way system conveying, enters induction heater rear plate induction coil energising quickly heating, after certain temperature retention time, steel plate moves to induction coil exit the target temperature reaching technique initialization, and meets Temperature Distribution requirement on cross section。When running into the serious steel plate of warpage, upper group of flat board induction coil can utilize mechanical shifting mechanism to lift rapidly, make this steel plate normal through, upper group flat board induction coil returns origin-location subsequently, carries out the heating of next block plate。
Embodiment 1
The present invention has point induction heater of half formula flat board induction coil mainly for carrying out sensing heating heat treatment after steel plate rolling, to improve tissue, to improve mechanical property, requiring in the present embodiment that the plurality of steel plates to specification is 400mm*40mm*3000mm is heated, material is pipe line steel。Require steel plate to heat to 700 degree from room temperature, heat and terminate the Temperature Distribution that rear steel plate is positioned on cross section, induction coil exit and control within +/-10 degree, and in heating process temperature less than 710 degree。
For realizing above-mentioned target, the invention provides and a kind of have a point induction heater for half formula flat board induction coil, as in figure 2 it is shown, wherein upper and lower two groups of flat board induction coils 2,6 cover in the scope of heated steel plate 1, copper pipe 3 is positioned on a horizontal plane。On upper and lower two groups of flat board induction coils 2,6 symmetric position copper pipe 3, electrical current direction is contrary all the time, and size, frequency and phase place are identical。Positive and negative two kinds of directions are certainly existed for electrical current direction on the copper pipe 3 of upper group of flat board induction coil 2 homonymy or the copper pipe 3 of lower group of flat board induction coil 6 homonymy, offset for reducing the magnetic field intensity formed between inverse current as far as possible, the copper pipe with equidirectional electric current is concentrated arrangement, is divided into front copper pipe and rear copper pipe by copper pipe 3；So, the front copper pipe 21 of homonymy and rear copper pipe 22 at upper group of flat board induction coil 2 will produce both direction opposing longitudinal magnetic field respectively, and the direction in two magnetic fields is all parallel with steel plate moving direction；The front copper pipe 61 of homonymy and rear copper pipe 62 at lower group of flat board induction coil 6 will produce both direction opposing longitudinal magnetic field respectively, and the direction in two magnetic fields is all parallel with steel plate moving direction。Corresponding to upper and lower two groups of flat board induction coils 2,6, steel plate is carried out sensing heating by producing four magnetic fields by steel plate 1, i.e. upper front copper pipe 21 composition corresponding to the front copper pipe 61 of lower group of flat board induction coil 6 one group organizing flat board induction coil 2, and the sense of current is contrary, the front copper pipe 21,61 of upper and lower two groups of induction coils forms the longitudinal magnetic field that both direction is identical, and the direction in two magnetic fields is all parallel with steel plate moving direction；The rear copper pipe 22 of upper group of flat board induction coil 2 composition corresponding to the rear copper pipe 62 of lower group of flat board induction coil 6 one group, and the sense of current is contrary, the rear copper pipe 22,62 of upper and lower two groups of induction coils forms the longitudinal magnetic field that both direction is identical, and the direction in two magnetic fields is all parallel with steel plate moving direction；The front copper pipe of homonymy flat board induction coil and the rear copper pipe sense of current are contrary, and front copper pipe and rear copper pipe form both direction opposing longitudinal magnetic field, and the direction in two magnetic fields is all parallel with steel plate moving direction。One longitudinal magnetic field of two magnetic field synthesis that the front copper pipe 61 of the front copper pipe 21 of upper group of flat board induction coil 2 with lower group of flat board induction coil 6 is produced, it is a longitudinal magnetic field B1 from right to left, referring to Fig. 6, one longitudinal magnetic field of two magnetic field synthesis produced by the rear copper pipe 62 of the rear copper pipe 22 of upper group of flat board induction coil 2 with lower group of flat board induction coil 6, is a longitudinal magnetic field B2 from left to right；Longitudinal magnetic field B1 and longitudinal magnetic field B2 direction is contrary all the time, and two magnetic directions are parallel with steel plate moving direction。
For improving the efficiency of heating surface as far as possible, upper and lower two groups of flat board induction coils 2, about 6 copper pipe surface distance: L=100mm is set；Spacing: d=150mm between front copper pipe and the rear copper pipe of homonymy induction coil。The space that heated steel plate 1 is formed between upper and lower two groups of flat board induction coils 2,6 is passed through, and in the present embodiment, steel plate translational speed in induction coil 2,6 is controlled in 0.015m/s。
Owing to the heat transfer of steel plate 1 thickness direction needs the regular hour, when skin temperature arrives target temperature, central temperature not up to desired value, namely there is certain temperature difference between top layer and center all the time, it is necessary to certain heat conduction time is to reduce this temperature difference。For this, after skin temperature reaches target temperature, it is necessary to giving certain temperature retention time so that central temperature continues rising and reaches target temperature, namely whole heating process must comprise and is rapidly heated and is incubated two stages。As it is shown on figure 3, first heated on steel plate top layer to close to 700 degree in heating process, steel plate continues to move to enter a soaking zone subsequently, and ensures that skin temperature maintains between 690～710 all the time。In whole heating process, central temperature gradually rises, and the temperature difference between top layer is gradually reduced, within being finally reached the temperature range of regulation。In order to reduce heat time heating time, improve the programming rate of steel plate core, it is necessary to as much as possible improve skin temperature, because central part temperature completes mainly by conduction of heat。Make holding stage steel plate skin temperature maintain and a high level exists certain difficulty, for realizing this function, it is necessary to be optimized design to for the spacing between the coil copper pipe (rear copper pipe) of Heat preservation。As in figure 2 it is shown, arrange compared to the solid matter of the bringing-up section of front copper pipe 21,61, the sparse arrangement of copper pipe that rear copper pipe 22,62 soaking zone is corresponding。By plumbers shed from optimize the setting of given power curve on design, the cooperation of steel plate translational speed and induction coil, it is possible to the temperature of whole heating process is controlled near 700 degree, and heating process maximum temperature is less than 710 degree。
In heating process when running into steel plate 1 and there is serious warping phenomenon, then upper group of flat board induction coil 2 can be lifted and be not heated process, allow steel plate by original speed normal through。Upper group flat board induction coil 2 is returned to original position subsequently, in order to be smoothed out the heat treated of next block plate。
Embodiment 2
Requiring in the present embodiment that the plurality of steel plates to specification is 2200mm*20mm*25000mm is heated, material is mould steel。Require steel plate to heat to 600 degree from 200 degree, heat and terminate the Temperature Distribution that rear steel plate is positioned on cross section, induction coil exit and control within +/-10 degree, and in heating process temperature less than 610 degree。
For realizing above-mentioned target, the invention provides and a kind of there is a point induction heater for half formula flat board induction coil, the copper pipe surface distance of its upper and lower flat board induction coil 2,6: L=80mm；Spacing: d=200mm between front copper pipe and rear copper pipe that in homonymy induction coil, the sense of current is contrary。Owing to the heat transfer of steel plate thickness direction needs the regular hour, when skin temperature arrives target temperature, central temperature not up to desired value, namely there is certain temperature difference between top layer and center all the time, it is necessary to certain heat conduction time is to reduce this temperature difference。For this, after skin temperature reaches target temperature, it is necessary to giving certain temperature retention time so that central temperature continues rising and reaches target temperature, namely whole heating process must comprise and is rapidly heated and is incubated two stages。
In the present embodiment 2, steel plate translational speed in induction coil is controlled in 0.3m/s。First being heated on steel plate top layer to close to 600 degree in heating process, steel plate continues to move to enter a soaking zone subsequently, and ensures that skin temperature maintains between 590～610 all the time。In whole heating process, central temperature gradually rises, and the temperature difference between top layer is gradually reduced, within being finally reached the temperature range of regulation。In order to reduce heat time heating time, improve the programming rate of steel plate core, it is necessary to as much as possible improve skin temperature, because central part temperature completes mainly by conduction of heat。Making holding stage steel plate skin temperature maintain and there is certain difficulty on a high level, for realizing this function, the present embodiment 2 adopts multipair flat board induction coil to be arranged side by side。As shown in Figure 4, adopt 4 altogether to upper and lower flat board induction coil 2,6, between each pair of induction coil 2,6, arrange rollgang 5。In the constant situation of steel plate translational speed, by setting the different capacity curve on each pair of induction coil, it is possible to the temperature of whole heating process controlled near 600 degree, and heating process maximum temperature is less than 610 degree。
In heating process when running into steel plate 1 and there is serious warping phenomenon, then upper group of flat board induction coil 2 can be lifted and be not heated process, allow steel plate by original speed normal through。Upper group flat board induction coil 2 is returned to original position subsequently, in order to be smoothed out the heat treated of next block plate。
These are only presently preferred embodiments of the present invention, be not intended to limit the protection domain of invention, therefore, all make within the spirit and principles in the present invention any amendment, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (8)
1. one kind has a point induction heater for half formula flat board induction coil, it is characterized in that: include group flat board induction coil (2) and lower group of flat board induction coil (6), lower group of flat board induction coil (6) is fixedly installed on induction furnace support, upper group of flat board induction coil (2) is installed on and can move up and down on framework, upper group of flat board induction coil (2) is corresponding to lower group of flat board induction coil (6), upper group of flat board induction coil (2) and lower group of flat board induction coil (6) partner flat board induction coil, heated sheet material (1) is from upper and lower two groups of flat board induction coils (2, 6) pass through between；Described flat board induction coil is formed by multi-loop copper tube (3) coiling。
2. according to claim 1 have a point induction heater for half formula flat board induction coil, it is characterized in that: the sense of current that described upper group of flat board induction coil (2) and lower group of flat board induction coil (6) are flow through is contrary, and size, phase and frequency are identical。
3. according to claim 1 and 2 have a point induction heater for half formula flat board induction coil, it is characterized in that: described flat board induction coil includes copper pipe (3) and yoke (4), yoke (4) is E shape, two active sections of multi-loop copper tube coil (3) are respectively placed in two inside grooves of yoke E shape flat raft and place, the copper pipe (3) being placed in yoke E shape groove front portion is front copper pipe, the copper pipe (4) being placed in yoke E shape groove rear portion is rear copper pipe, and it is contrary with the sense of current flowing through described rear copper pipe to flow through described front copper pipe；Heated sheet material (1) copper pipe in the past passes through in copper pipe direction backward。
4. according to claim 3 have a point induction heater for half formula flat board induction coil, it is characterized in that: the front and back copper pipe of described upper group of flat board induction coil (2) is positioned in approximately the same plane, the front and back copper pipe of described lower group of flat board induction coil (6) is positioned in approximately the same plane。
5. according to claim 4 have a point induction heater for half formula flat board induction coil, it is characterized in that: the copper pipe lower surface of described upper group of flat board induction coil (2) is satisfied with the copper pipe upper surface distance L of described lower group of flat board induction coil (6): 50mm < L < 150mm。
6. according to claim 4 have a point induction heater for half formula flat board induction coil, it is characterized in that: between front copper pipe and the rear copper pipe of described flat board induction coil homonymy, spacing d meets: 100mm < d < 400mm。
7. according to claim 3 have a point induction heater for half formula flat board induction coil, it is characterized in that: the flat raft arranging density of the rear copper pipe of described upper and lower two groups of flat board induction coils (2,6) is not more than the flat raft arranging density of front copper pipe。
8. according to claim 1 have a point induction heater for half formula flat board induction coil, it is characterized in that: described flat board induction coil (2,6) has multipair, multipair flat board induction coil interval rollgang (5) is arranged side by side, and in the longitudinal magnetic field of adjacent two pairs of flat board induction coils formation, two magnetic directions are identical adjacent to one another。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793217A (en) * | 2016-12-15 | 2017-05-31 | 佛山市宏科瑞纳米热能科技有限公司 | Noiseless segmentation and non-blind area heater and its control method |
| CN111083820A (en) * | 2020-01-22 | 2020-04-28 | 齐齐哈尔大学 | Open-close type induction heater |
| CN113141687A (en) * | 2021-03-29 | 2021-07-20 | 首钢京唐钢铁联合有限责任公司 | Slab induction heating device and system |
| CN113664057A (en) * | 2021-08-27 | 2021-11-19 | 江阴中意电气有限公司 | Magnesium alloy plate induction heater |
| CN115022994A (en) * | 2022-07-11 | 2022-09-06 | 宁波祥路中天新材料科技股份有限公司 | Electric induction heating device for continuous strip |
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| CN113141687A (en) * | 2021-03-29 | 2021-07-20 | 首钢京唐钢铁联合有限责任公司 | Slab induction heating device and system |
| CN113664057A (en) * | 2021-08-27 | 2021-11-19 | 江阴中意电气有限公司 | Magnesium alloy plate induction heater |
| CN115022994A (en) * | 2022-07-11 | 2022-09-06 | 宁波祥路中天新材料科技股份有限公司 | Electric induction heating device for continuous strip |
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