CN113141687B - Slab induction heating device and system - Google Patents
Slab induction heating device and system Download PDFInfo
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- CN113141687B CN113141687B CN202110332305.2A CN202110332305A CN113141687B CN 113141687 B CN113141687 B CN 113141687B CN 202110332305 A CN202110332305 A CN 202110332305A CN 113141687 B CN113141687 B CN 113141687B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 231
- 230000006698 induction Effects 0.000 title claims abstract description 214
- 238000010030 laminating Methods 0.000 claims abstract description 12
- 230000007423 decrease Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 7
- 230000005674 electromagnetic induction Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 11
- 230000011218 segmentation Effects 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000004907 flux Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a slab induction heating device and a system, belonging to the technical field of electromagnetic induction heating, wherein the slab induction heating device comprises an upper heater and a lower heater which are arranged oppositely, the upper heater and the lower heater are respectively provided with an upper total magnetic circuit and a lower total magnetic circuit, the upper total magnetic circuit is formed by laminating a plurality of sections of upper magnetic circuit units and upper supporting blocks, and the lower total magnetic circuit is formed by laminating a plurality of sections of lower magnetic circuit units and lower supporting blocks; the upper magnetic circuit units of the upper total magnetic circuit are arranged in a way that the length of at least one section of the upper magnetic circuit units is greater than or less than that of the rest sections; and/or the lower magnetic circuit units of the lower total magnetic circuit are arranged in a mode that the length of at least one section of the lower magnetic circuit units is greater than or less than that of the rest sections, and the slab induction heating system comprises a plurality of slab induction heating devices. Through the structure, the slab induction heating device and the slab induction heating system can heat the slab more uniformly and efficiently.
Description
Technical Field
The invention belongs to the technical field of electromagnetic induction heating, and particularly relates to a slab induction heating device and system.
Background
The electromagnetic induction heating equipment is widely applied due to high heating speed and high electric energy conversion efficiency, and the working principle of the electromagnetic induction heating equipment is that an alternating induction magnetic field generated by an induction heater acts on a conductive heated material to generate induction current in the heated material, and the heat effect of the current heats the material.
The plate blank electromagnetic induction heating device generally at least comprises two induction heaters which generate magnetic fields, the two induction heaters are respectively arranged above and below a plate blank to be heated, and coils in the induction heaters are electrified to generate the induction fields, are conducted by magnetizers (magnetic circuits) and then act on the plate blank to heat the plate blank, but the technical problem of poor heating effect exists.
Disclosure of Invention
The invention provides a slab induction heating device and a slab induction heating system, which are used for solving the technical problem that induction heating equipment in the prior art is poor in heating effect on slabs.
The invention is realized by the following technical scheme: a slab induction heating device comprises an upper heater and a lower heater which are arranged oppositely, wherein the upper heater and the lower heater are respectively provided with an upper total magnetic circuit and a lower total magnetic circuit, the upper total magnetic circuit is formed by laminating a plurality of sections of upper magnetic circuit units and upper supporting blocks, and the lower total magnetic circuit is formed by laminating a plurality of sections of lower magnetic circuit units and lower supporting blocks;
the upper magnetic circuit units in the upper total magnetic circuit are arranged in a mode that the length of at least one section of the upper magnetic circuit units is greater than or less than that of the rest sections; and/or the presence of a gas in the gas,
the lower magnetic circuit units in the lower total magnetic circuit are arranged in a mode that the length of at least one section of the lower magnetic circuit units is greater than or less than that of the rest sections.
Furthermore, in order to better realize the invention, the lengths of the two adjacent sections of the upper magnetic circuit units are different; and/or the presence of a gas in the gas,
the lengths of the adjacent two sections of the lower magnetic circuit units are different.
Further, in order to better implement the present invention, the stacking direction of the upper magnetic circuit unit and the stacking direction of the lower magnetic circuit unit are in the same direction, the length of each section of the upper magnetic circuit unit and the length of each section of the lower magnetic circuit unit linearly change along the stacking direction, and the length change of each section of the upper magnetic circuit unit and the length change of each section of the lower magnetic circuit unit are in a negative correlation relationship.
Further, in order to better implement the present invention, a stacking direction of the upper magnetic circuit units and a stacking direction of the lower magnetic circuit units are the same, and lengths of the respective sections of the upper magnetic circuit units are gradually increased from a middle portion of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and lengths of the respective sections of the lower magnetic circuit units are gradually decreased from the middle portion of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
Further, in order to better implement the present invention, a stacking direction of the upper magnetic circuit units and a stacking direction of the lower magnetic circuit units are the same, and lengths of the respective sections of the upper magnetic circuit units are gradually shortened from a middle portion of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and lengths of the respective sections of the lower magnetic circuit units are gradually increased from the middle portion of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
Further, in order to better implement the present invention, the length of the upper total magnetic circuit is equal to the length of the lower total magnetic circuit, and the number of the upper magnetic circuit units in the upper total magnetic circuit is the same as the number of the lower magnetic circuit units in the lower total magnetic circuit.
The invention also provides a slab induction heating system which comprises a plurality of slab induction heating devices, wherein the plurality of slab induction heating devices are arranged side by side along a first direction, the stacking direction of each upper magnetic circuit unit and each lower magnetic circuit unit in the plurality of slab induction heating devices is the same, the arrangement modes of the upper magnetic circuit units in two adjacent slab induction heating devices are different, the arrangement modes of the lower magnetic circuit units in two adjacent slab induction heating devices are different, and the first direction is a direction perpendicular to the stacking direction.
Further, in order to better implement the present invention, every adjacent four slab induction heating apparatuses in the plurality of slab induction heating apparatuses form a first group, and the four slab induction heating apparatuses in the first group are respectively a first induction heating apparatus, a second induction heating apparatus, a third induction heating apparatus and a fourth induction heating apparatus along the first direction;
the lengths of the sections of the upper magnetic circuit units of the first induction heating device are gradually increased along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the first induction heating device are gradually shortened along the stacking direction;
the lengths of the upper magnetic circuit units of the sections of the second induction heating device are gradually shortened along the stacking direction, and the lengths of the lower magnetic circuit units of the sections of the second induction heating device are gradually increased along the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the third induction heating device gradually increase from the middle of the upper main magnetic circuit to the two ends of the upper main magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the second induction heating device gradually decrease from the middle of the lower main magnetic circuit to the two ends of the lower main magnetic circuit in the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the fourth induction heating device are gradually shortened from the middle of the upper main magnetic circuit toward the two ends of the upper main magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the second induction heating device are gradually increased from the middle of the lower main magnetic circuit toward the two ends of the lower main magnetic circuit in the stacking direction.
Further, in order to better implement the invention, every two adjacent slab induction heating devices in the plurality of slab induction heating devices form a second group, and the two slab induction heating devices in the second group are respectively a fifth induction heating device and a sixth induction heating device along the first direction;
the lengths of the sections of the upper magnetic circuit units of the fifth induction heating device are gradually increased along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the fifth induction heating device are gradually shortened along the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the sixth induction heating device are gradually shortened along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the sixth induction heating device are gradually increased along the stacking direction.
Further, in order to better implement the present invention, every two adjacent slab induction heating devices in the plurality of slab induction heating devices form a third group, and the two slab induction heating devices in the third group are a seventh induction heating device and an eighth induction heating device respectively along the first direction;
the lengths of the sections of the upper magnetic circuit units of the seventh induction heating device gradually increase from the middle of the upper main magnetic circuit to both ends of the upper main magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the seventh induction heating device gradually decrease from the middle of the lower main magnetic circuit to both ends of the lower main magnetic circuit in the stacking direction;
the lengths of the sections of the upper magnetic circuit unit of the eighth induction heating apparatus are gradually shortened from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit unit of the eighth induction heating apparatus are gradually increased from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
Compared with the prior art, the invention has the following beneficial effects:
the slab induction heating device provided by the invention comprises an upper heater and a lower heater which are arranged oppositely, wherein the upper heater is provided with an upper total magnetic circuit, the lower heater is provided with a lower total magnetic circuit, the upper total magnetic circuit is formed by laminating a plurality of sections of upper magnetic circuit units and upper supporting blocks, the lower total magnetic circuit is formed by laminating a plurality of sections of lower magnetic circuit units and a lower supporting block, the length of at least one section of the plurality of upper magnetic circuit units is greater than or less than that of the rest sections, and/or the length of at least one section of the plurality of lower magnetic circuit units is greater than or less than that of the rest sections. By the structure, the length of at least one section of the upper magnetic circuit unit in the upper heater is different from the lengths of the rest upper magnetic circuit units, and/or the length of at least one section of the lower magnetic circuit unit in the lower heater is different from the lengths of the rest magnetic circuit units, so when the induction heating device is used for heating a plate blank, because at least one magnetic circuit unit with the length different from that of the rest magnetic circuit units is arranged in the upper heater and/or the lower heater, the overlapping probability of the upper support block and the lower support block is reduced because the distance between at least one group of adjacent upper support blocks and/or one group of adjacent lower support blocks is different from the distance between the rest adjacent upper support blocks and/or adjacent lower support blocks, and the reinforcing effect of uneven segmentation of the upper magnetic field and the lower magnetic field can be effectively avoided, and therefore, the heating effect on the plate blank is improved in the whole heating process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the distribution of magnetic lines of force of a prior art heater;
fig. 2 is a schematic structural view of a slab induction heating apparatus in which the lengths of the upper magnetic circuit units of the respective segments gradually increase in the stacking direction and the lengths of the lower magnetic circuit units of the respective segments gradually decrease in the stacking direction in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a slab induction heating apparatus in which the lengths of the upper magnetic circuit units of the respective segments are gradually shortened in the stacking direction and the lengths of the lower magnetic circuit units of the respective segments are gradually increased in the stacking direction in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a slab induction heating apparatus in which the lengths of the upper magnetic circuit units of the respective sections are gradually shortened from the middle toward the two ends in the stacking direction and the lengths of the lower magnetic circuit units of the respective sections are gradually increased from the middle toward the two ends in the stacking direction in embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a slab induction heating apparatus in which the lengths of the upper magnetic circuit units of the respective sections gradually increase from the middle toward the two ends in the stacking direction and the lengths of the lower magnetic circuit units of the respective sections gradually decrease from the middle toward the two ends in the stacking direction in embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a slab induction heating system provided in a first type of embodiment 2 of the present invention;
fig. 7 is a schematic structural view of a slab induction heating system provided in a second type of embodiment 2 of the present invention;
fig. 8 is a schematic structural view of a slab induction heating system according to a third type of embodiment 2 of the present invention.
In the figure:
1-an upper heater; 11-upper magnetic circuit unit; 12-an upper support block;
2-a lower heater; 21-lower magnetic circuit unit; 22-a lower support block;
3-a plate blank;
100-a first induction heating device;
200-a second induction heating means;
300-a third induction heating unit;
400-a fourth induction heating unit;
500-a fifth induction heating unit;
600-a sixth induction heating unit;
700-seventh induction heating means;
800-an eighth induction heating unit;
1000-a heater; 1100-magnetic circuit unit; 1200-support block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
the embodiment provides an induction heater for solving the technical problem that a slab induction heating device in the prior art is not good in heating effect on slabs. Specifically, the slab induction heating apparatus in the prior art includes at least two heaters 1000 that are arranged on two sides of the slab to be heated one on top of the other, and each heater 1000 is internally provided with a total magnetic circuit, and the total magnetic circuit is formed by laminating a plurality of sections of magnetic circuit units 1100, and in consideration of structural design, an insulating supporting block 1200 is arranged between the adjacent magnetic circuit units 1100. When the induction heater 1000 of the prior art heats a slab, because the upper and lower total magnetic circuit segmentation patterns and the length of the single magnetic circuit unit 1100 are the same, in many cases, the magnetic field segmentation distribution patterns of the upper and lower heaters 1000 converge, and when the upper and lower support blocks 1200 are aligned, the magnetic field segmentation is strengthened unevenly, and the heating temperature distribution of the heated slab is uneven, so that the technical problem of poor heating effect is caused.
The slab induction heating device provided by the embodiment sets the length of at least one section of a plurality of upper magnetic circuit units 11 of a plurality of upper heaters 1 to be different from the length of the rest sections, and/or sets the length of at least one section of a plurality of lower magnetic circuit units 21 of a lower heater 2 to be different from the length of the rest sections, so as to reduce the overlapping times of upper and lower supporting blocks, and further improve the heating effect on the slab 3.
The slab induction heating device provided by the embodiment includes an upper heater 1 and a lower heater 2 which are arranged oppositely, the upper heater 1 is provided with an upper total magnetic circuit, the lower heater 2 is provided with a lower total magnetic circuit, it is noted that the opposite arrangement is arranged oppositely up and down in the width direction of the heater, the upper total magnetic circuit is formed by laminating a plurality of sections of upper magnetic circuit units 11 and upper supporting blocks 12, the lower total magnetic circuit is formed by laminating a plurality of sections of lower magnetic circuit units 21 and lower supporting blocks 22, it is noted that a plurality of upper magnetic circuit units 11 and upper supporting blocks 12 in the embodiment are arranged in a staggered manner and laminated together, a plurality of lower magnetic circuit units 21 and lower supporting blocks 22 are also arranged in a staggered manner and laminated together, the laminating manner is the same as that of the prior art, and thus detailed description thereof is omitted herein. It is to be noted that the length of the upper total magnetic circuit in the present embodiment is equal to the length of the lower total magnetic circuit, and the number of upper magnetic circuit units 11 in the upper total magnetic circuit is the same as the number of lower magnetic circuit units 21 in the lower total magnetic circuit.
Different from the prior art, the upper magnetic circuit units 11 in the upper total magnetic circuit are arranged in a manner that the length of at least one section of the plurality of upper magnetic circuit units 11 is greater than or less than the length of the rest section, and/or the lower magnetic circuit units 21 in the lower total magnetic circuit are arranged in a manner that the length of at least one section of the plurality of lower magnetic circuit units 21 is greater than or less than the length of the rest section. This embodiment includes three implementations, the first being: the length of at least one section of the upper magnetic circuit units 11 is greater than or less than the length of the rest sections, that is, the length of at least one section of the upper magnetic circuit units 11 is different from the length of the rest sections of the upper magnetic circuit units 11, and the length of each section of the lower magnetic circuit units 21 is the same; the second method is as follows: the length of at least one section of the lower magnetic circuit units 21 is greater than or less than the length of the rest section, that is, the length of at least one section of the lower magnetic circuit units 21 is different from the length of the rest section of the lower magnetic circuit units 21, and the length of each section of the upper magnetic circuit units 11 is the same; the third is: at least one of the plurality of upper magnetic circuit units 11 has a length greater than or less than that of the remaining upper magnetic circuit units 11, and at least one of the plurality of lower magnetic circuit units 21 has a length greater than or less than that of the remaining lower magnetic circuit units 21. The best mode of the present embodiment is the third mode described above.
By the above structure, the length of at least one section of the upper magnetic circuit unit 11 in the upper heater 1 is different from the lengths of the rest of the upper magnetic circuit units 11, and/or the length of at least one section of the lower magnetic circuit unit 21 in the lower heater 2 is different from the lengths of the rest of the magnetic circuit units 21, so when the induction heating device is used for heating the slab 3, because at least one magnetic circuit unit with a length different from that of the other magnetic circuit units is arranged in the upper heater 1 and/or the lower heater 2, the distance between at least one group of the adjacent upper support blocks 12 and/or one group of the adjacent lower support blocks 22 is different from the distance between the rest of the adjacent upper support blocks 12 and/or the adjacent lower support blocks 22, that is, at least one upper support block 12 and one lower support block 22 are dislocated, therefore, the number of times of simultaneous overlapping of the plurality of upper support blocks 12 and the plurality of lower support blocks 22 is less, the probability of occurrence of the reinforcing effect of sectional unevenness of the upper and the lower magnetic field is reduced, and the heating effect of the slab 3 is improved in the whole heating process. It should be noted that the upper support block 12 and the lower support block 22 are both of an insulating block structure for supporting the upper total magnetic circuit and the lower total magnetic circuit, which is the same as the prior art, and therefore, detailed description thereof is omitted here. For the prior art electromagnetic induction heater of the slab 3, the technical principle is that a magnetic flux passes through the heated slab 3. The slab induction heating device designed by the invention avoids the situation that the upper heater 2 and the lower heater 2 are completely the same due to the magnetic circuit segmentation mode, thereby reducing the overlapping times of the magnetic circuit separation part and further relieving the uneven temperature distribution segmentation of the section of the slab 3.
As an implementation manner of the present embodiment, in the present embodiment, the upper magnetic circuit units 11 are arranged in a manner that the lengths of the upper magnetic circuit units 11 at two adjacent ends are different; and/or, the lower magnetic circuit units 21 are arranged in a way that the lengths of two adjacent sections of the lower magnetic circuit units 21 are different. Therefore, the overlapping times of the upper support blocks 12 and the lower support blocks can be further reduced, the probability of the reinforcing effect of sectional non-uniformity of the upper magnetic field and the lower magnetic field is reduced, and the heating efficiency of the slab 3 is further improved.
As an embodiment of the present embodiment, in this embodiment, the stacking direction of the upper magnetic circuit units 11 and the stacking direction of the lower magnetic circuit units 21 are the same, so that the upper magnetic circuit units 11 and the lower magnetic circuit units 21 are arranged in parallel at the upper and lower sides, the length of each upper magnetic circuit unit 11 and the length of each lower magnetic circuit unit 21 change linearly along the stacking direction, and the length of each upper magnetic circuit unit 11 and the length of each lower magnetic circuit unit 21 change in a negative correlation relationship. As a specific implementation manner of the present embodiment, the upper magnetic circuit units 11 are arranged in such a manner that the length of each segment of the upper magnetic circuit units 11 gradually increases along the stacking direction, and the lower magnetic circuit units 21 are arranged in such a manner that the length of each segment of the lower magnetic circuit units 21 gradually decreases along the stacking direction. As another embodiment of the present embodiment, the upper magnetic path units 11 are arranged in such a manner that the length of each upper magnetic path end member is gradually shortened in the stacking direction, and the lower magnetic path units 21 are arranged in such a manner that the length of each lower magnetic path unit 21 is gradually shortened in the stacking direction. Therefore, the times of overlapping the upper supporting blocks 12 and the lower supporting blocks 22 can be further reduced, the probability of the reinforcing effect of the sectional non-uniformity of the upper magnetic field and the lower magnetic field is reduced, and the heating efficiency of the slab 3 is further improved. Preferably, the difference between the magnetic circuit units 11 on the adjacent segments is the same, and the difference between the magnetic circuit units 21 on the adjacent segments is also the same.
As another embodiment of the present embodiment, in this embodiment, the stacking direction of the upper magnetic circuit units 11 and the stacking direction of the lower magnetic circuit units 21 are the same, and actually the stacking direction of the upper magnetic circuit units 11 is the length direction of the upper total magnetic circuit, the upper magnetic circuit units 11 are arranged in such a manner that the length of each upper magnetic circuit unit 11 gradually increases from the middle of the upper total magnetic circuit toward the two ends of the upper total magnetic circuit in the stacking direction, the stacking direction of the lower magnetic circuit units 21 is the length direction of the lower total magnetic circuit, and the lower magnetic circuit units 21 are arranged in such a manner that the length of each lower magnetic circuit unit 21 gradually decreases from the middle of the lower total magnetic circuit toward the two ends of the lower total magnetic circuit in the stacking direction. Therefore, the times of overlapping the upper supporting blocks 12 and the lower supporting blocks 22 can be further reduced, the probability of the occurrence of the reinforcing effect of the sectional unevenness of the upper magnetic field and the lower magnetic field is reduced, and the heating efficiency of the slab 3 is further improved. Preferably, the difference between the magnetic circuit units 11 on the adjacent segments is the same, and the difference between the magnetic circuit units 21 on the adjacent segments is also the same.
As a further embodiment of the present embodiment, in the present embodiment, the stacking direction of the upper magnetic path unit 11 and the stacking direction of the lower magnetic path unit 21 are the same, and the upper magnetic path unit 11 is disposed in such a manner that the length of each segment of the upper magnetic path unit 11 is gradually shortened from the middle of the upper total magnetic path toward both ends of the upper total magnetic path in the stacking direction, and the lower magnetic path unit 21 is disposed in such a manner that the length of each segment of the lower magnetic path unit 21 is gradually increased from the middle of the lower total magnetic path toward both ends of the lower total magnetic path in the stacking direction. Therefore, the times of overlapping the upper supporting blocks 12 and the lower supporting blocks 22 can be further reduced, the probability of the reinforcing effect of the uneven segmentation of the upper magnetic field and the lower magnetic field is reduced, and the heating efficiency of the slab 3 is further improved. Preferably, the difference between the magnetic circuit units 11 on the adjacent segments is the same, and the difference between the magnetic circuit units 21 on the adjacent segments is also the same.
Of course, as a simple implementation manner of the present embodiment, in the present embodiment, only one of the plurality of upper magnetic circuit units 11 may be set to have a length different from that of the remaining sections, while the lengths of the upper magnetic circuit units 11 of the remaining sections are the same, and the lengths of all the lower magnetic circuit units 21 are the same.
Example 2:
the present embodiment provides a slab induction heating system including a plurality of induction heating apparatuses according to embodiment 1, in which the upper magnetic circuit units 11 and the lower magnetic circuit units 21 are stacked in the same manner, and the plurality of induction heating apparatuses are arranged side by side in a first direction perpendicular to the stacking. The two adjacent upper magnetic circuit units 11 are arranged in different manners, and the two adjacent lower magnetic circuit units 21 are arranged in different manners. Thus, according to the analysis of the electromagnetic principle, the magnetic fluxes generated by the upper and lower heaters do not completely penetrate through the heated slab 3, and a part of the magnetic fluxes do not penetrate through the slab 3 and only act on the surface layer of the slab 3, so that the magnetic circuit units of the upper heater 1 are segmented to cause the magnetic field distribution to influence the temperature distribution of the upper surface of the slab 3, and the magnetic circuit units of the lower heater 2 are segmented to influence the temperature distribution of the lower surface of the slab 3. In the slab induction heating system provided in this embodiment, the magnetic circuit units of the adjacent upper induction heating device are arranged in different ways, and similarly, the magnetic circuit distribution patterns of the adjacent lower heater 2 are also different, and as in the prior art, during heating, the slab 3 is translated relative to the induction heating system, so that, under the common action of a plurality of induction heating devices, for example, a first position of the slab 3 corresponding to a first time point, a certain part of the slab 3 is not heated to an ideal temperature due to the overlapping of the upper support block 12 and the lower support block 22, but at a second position corresponding to a second time point, the part not heated to an ideal temperature of the slab 3 can be translated to an overlapping position of the upper support block 12 and the lower support block 22, thereby the slab 3 can be heated to achieve the problem of uneven heating effect of the slab 3 in the prior art. And when heating, the strengthening effect of the sectional non-uniformity of the upper magnetic field and the lower magnetic field is lower, so that the heating effect on the plate blank 3 is better.
As a first type of embodiment of this embodiment, in this embodiment, every adjacent four of the plurality of induction heating apparatuses form a first group, and the four induction heating apparatuses in the first group are the first induction heating apparatus 100, the second induction heating apparatus 200, the third induction heating apparatus 300, and the fourth induction heating apparatus 400, respectively, along the first direction;
the length of each upper magnetic circuit unit 11 of the first induction heating apparatus 100 gradually increases along the stacking direction, and the length of each lower magnetic circuit unit 21 of the first induction heating apparatus 100 gradually decreases along the stacking direction;
the length of each upper magnetic circuit unit 11 of the second induction heating apparatus 200 is gradually shortened along the stacking direction, and the length of each lower magnetic circuit unit 21 of the second induction heating apparatus 200 is gradually increased along the stacking direction;
the length of each upper magnetic circuit unit 11 of each section of the third induction heating apparatus 300 gradually increases from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the length of each lower magnetic circuit unit 21 of each section of the second induction heating apparatus 200 gradually decreases from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction;
the length of each upper magnetic circuit unit 11 of the fourth induction heating apparatus 400 gradually decreases from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the length of each lower magnetic circuit unit 21 of the second induction heating apparatus 200 gradually increases from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
Note that, in the present embodiment, the number of slab induction heating apparatuses is 4 or more. In fact, the induction heating system in this embodiment can understand the following arrangement of the slab induction heating apparatuses in the first direction: the induction heating apparatus includes a first induction heating apparatus 100, a second induction heating apparatus 200, a third induction heating apparatus 300, a fourth induction heating apparatus 400, the first induction heating apparatus 100, the second induction heating apparatus 200, the third induction heating apparatus 300, the fourth induction heating apparatus 400 \8230 \ 8230;, and so on.
As a second type of embodiment of this embodiment, in this embodiment, every two adjacent induction heating apparatuses in a plurality of induction heating apparatuses form a second group, and the two induction heating apparatuses in the second group are respectively a fifth induction heating apparatus 500 and a sixth induction heating apparatus 600 along the first direction;
the length of each upper magnetic circuit unit 11 of the fifth induction heating apparatus 500 gradually increases along the stacking direction, and the length of each lower magnetic circuit unit 21 of the fifth induction heating apparatus 500 gradually decreases along the stacking direction;
the length of the upper magnetic circuit unit 11 of each segment of the sixth induction heating apparatus 600 gradually decreases in the stacking direction, and the length of the lower magnetic circuit unit 21 of each segment of the sixth induction heating apparatus gradually increases in the stacking direction.
Note that, in the present embodiment, the number of slab induction heating apparatuses is 2 or more. In fact, the induction heating system in the present embodiment can understand that the arrangement of the slab induction heating apparatuses in the first direction is as follows: fifth induction heating apparatus 500, sixth induction heating apparatus 600, fifth induction heating apparatus 500, sixth induction heating apparatus 600 \8230, 8230, and so on.
As a third type of embodiment of this embodiment, in this embodiment, every two adjacent slab induction heating apparatuses in the plurality of slab induction heating apparatuses form a third group, and two slab induction heating apparatuses in the third group are a seventh induction heating apparatus 700 and an eighth induction heating apparatus 800, respectively, along the first direction;
the length of each upper magnetic circuit unit 11 of each section of the seventh induction heating apparatus 700 gradually increases from the middle of the upper total magnetic circuit to both ends of the upper total magnetic circuit in the stacking direction, and the length of each lower magnetic circuit unit 21 of each section of the seventh induction heating apparatus 700 gradually decreases from the middle of the lower total magnetic circuit to both ends of the total magnetic circuit in the stacking direction;
the length of each upper magnetic circuit unit 11 of each section of the eighth induction heating apparatus 800 gradually decreases from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the length of each lower magnetic circuit unit 21 of each section of the eighth induction heating apparatus 800 gradually increases from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
Note that, in the present embodiment, the number of slab induction heating apparatuses is 2 or more. In fact, the induction heating system in this embodiment can understand the following arrangement of the slab induction heating apparatuses in the first direction: seventh induction heating device 700, eighth induction heating device 800, seventh induction heating device 700, eighth induction heating device 800 \8230, 8230, and so on.
It is understood that other embodiments are also possible in the present embodiment, for example, the arrangement of the plurality of induction heating units in the first direction is as follows:
the induction heating system comprises a first induction heating device 100, a third induction heating device 300, a second induction heating device 200, a fourth induction heating device 400, the first induction heating device 100, the third induction heating device 300, the second induction heating device 200 and the fourth induction heating device 400, 8230, 8230and the like;
or the first induction heating device 100, the fourth induction heating device 400, the third induction heating device 300, the second induction heating device 200, the first induction heating device 100, the fourth induction heating device 400, the third induction heating device 300, the second induction heating device 200 \8230;, and so on.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A slab induction heating device is characterized in that: the magnetic circuit comprises an upper heater and a lower heater which are arranged oppositely, wherein the upper heater and the lower heater are respectively provided with an upper total magnetic circuit and a lower total magnetic circuit, the upper total magnetic circuit is formed by laminating a plurality of sections of upper magnetic circuit units and upper supporting blocks, and the lower total magnetic circuit is formed by laminating a plurality of sections of lower magnetic circuit units and lower supporting blocks;
the upper magnetic circuit units in the upper total magnetic circuit are arranged in a mode that the length of at least one section of the upper magnetic circuit units is greater than or less than that of the rest sections; and/or the presence of a gas in the gas,
the lower magnetic circuit units in the lower total magnetic circuit are arranged in a mode that the length of at least one section of the lower magnetic circuit units is greater than or less than that of the rest sections;
the lengths of the two adjacent sections of the upper magnetic circuit units are different; and/or the presence of a gas in the gas,
the lengths of the two adjacent sections of the lower magnetic circuit units are different;
the stacking direction of the upper magnetic circuit unit and the stacking direction of the lower magnetic circuit unit are in the same direction, the length of each section of the upper magnetic circuit unit and the length of each section of the lower magnetic circuit unit are linearly changed along the stacking direction, and the length change of each section of the upper magnetic circuit unit and the length change of each section of the lower magnetic circuit unit are in a negative correlation relation.
2. An induction heating apparatus for a sheet blank as set forth in claim 1, wherein: or, the stacking direction of the upper magnetic circuit unit and the stacking direction of the lower magnetic circuit unit are in the same direction, and the length of each segment of the upper magnetic circuit unit gradually increases from the middle of the upper main magnetic circuit to both ends of the upper main magnetic circuit in the stacking direction, and the length of each segment of the lower magnetic circuit unit gradually decreases from the middle of the lower main magnetic circuit to both ends of the lower main magnetic circuit in the stacking direction.
3. An induction heating apparatus for a sheet blank as set forth in claim 1, wherein: or, the stacking direction of the upper magnetic circuit unit and the stacking direction of the lower magnetic circuit unit are in the same direction, and the length of each segment of the upper magnetic circuit unit is gradually shortened from the middle of the upper main magnetic circuit to the two ends of the upper main magnetic circuit in the stacking direction, and the length of each segment of the lower magnetic circuit unit is gradually increased from the middle of the lower main magnetic circuit to the two ends of the lower main magnetic circuit in the stacking direction.
4. A slab induction heating apparatus as set forth in any one of claims 1 to 3, wherein: the length of the upper total magnetic circuit is equal to the length of the lower total magnetic circuit, and the number of the upper magnetic circuit units in the upper total magnetic circuit is the same as the number of the lower magnetic circuit units in the lower total magnetic circuit.
5. A slab induction heating system, characterized by: the slab induction heating apparatus comprising a plurality of slab induction heating apparatuses according to any one of claims 1 to 4, wherein the plurality of slab induction heating apparatuses are arranged side by side in a first direction, the stacking direction of each upper magnetic circuit unit and each lower magnetic circuit unit in the plurality of slab induction heating apparatuses is the same, the upper magnetic circuit units in adjacent two slab induction heating apparatuses are arranged in different manners, the lower magnetic circuit units in adjacent two slab induction heating apparatuses are arranged in different manners, and the first direction is a direction perpendicular to the stacking direction.
6. A slab induction heating system as set forth in claim 5, wherein: every adjacent four slab induction heating devices in the plurality of slab induction heating devices form a first group, and the four slab induction heating devices in the first group are respectively a first induction heating device, a second induction heating device, a third induction heating device and a fourth induction heating device along the first direction;
the lengths of the sections of the upper magnetic circuit units of the first induction heating device are gradually increased along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the first induction heating device are gradually shortened along the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the second induction heating device are gradually shortened along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the second induction heating device are gradually increased along the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the third induction heating device gradually increase from the middle of the upper main magnetic circuit to the two ends of the upper main magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the second induction heating device gradually decrease from the middle of the lower main magnetic circuit to the two ends of the lower main magnetic circuit in the stacking direction;
the lengths of the sections of the upper magnetic circuit unit of the fourth induction heating apparatus are gradually shortened from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit unit of the second induction heating apparatus are gradually increased from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
7. A slab induction heating system as set forth in claim 5, wherein: every two adjacent slab induction heating devices in the plurality of slab induction heating devices form a second group, and the two slab induction heating devices in the second group are respectively a fifth induction heating device and a sixth induction heating device along the first direction;
the lengths of the sections of the upper magnetic circuit units of the fifth induction heating device are gradually increased along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the fifth induction heating device are gradually shortened along the stacking direction;
the lengths of the sections of the upper magnetic circuit units of the sixth induction heating device are gradually shortened along the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the sixth induction heating device are gradually increased along the stacking direction.
8. A slab induction heating system of claim 5, wherein: every two adjacent slab induction heating devices in the plurality of slab induction heating devices form a third group, and the two slab induction heating devices in the third group are respectively a seventh induction heating device and an eighth induction heating device along the first direction;
the lengths of the sections of the upper magnetic circuit units of the seventh induction heating device gradually increase from the middle of the upper main magnetic circuit to both ends of the upper main magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit units of the seventh induction heating device gradually decrease from the middle of the lower main magnetic circuit to both ends of the lower main magnetic circuit in the stacking direction;
the lengths of the sections of the upper magnetic circuit unit of the eighth induction heating apparatus are gradually shortened from the middle of the upper total magnetic circuit toward both ends of the upper total magnetic circuit in the stacking direction, and the lengths of the sections of the lower magnetic circuit unit of the eighth induction heating apparatus are gradually increased from the middle of the lower total magnetic circuit toward both ends of the lower total magnetic circuit in the stacking direction.
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| US6576878B2 (en) * | 2001-01-03 | 2003-06-10 | Inductotherm Corp. | Transverse flux induction heating apparatus |
| CN105698525B (en) * | 2014-11-27 | 2019-07-23 | 宝山钢铁股份有限公司 | Induction heater with point half formula plate induction coil |
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| CN1252207A (en) * | 1998-02-13 | 2000-05-03 | 电气兴业株式会社 | Induction heating coil and induction heating device using the same |
| WO2013100544A1 (en) * | 2011-12-28 | 2013-07-04 | 주식회사 포스코 | Heating apparatus and heating method |
| CN111699271A (en) * | 2017-11-24 | 2020-09-22 | 达涅利机械设备股份公司 | Heating device and corresponding apparatus and method |
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