CN116397090B - Iron core heat treatment device and process - Google Patents
Iron core heat treatment device and process Download PDFInfo
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- CN116397090B CN116397090B CN202310650734.3A CN202310650734A CN116397090B CN 116397090 B CN116397090 B CN 116397090B CN 202310650734 A CN202310650734 A CN 202310650734A CN 116397090 B CN116397090 B CN 116397090B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 232
- 238000010438 heat treatment Methods 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 45
- 238000000137 annealing Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 239000011261 inert gas Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000002045 lasting effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The application relates to the technical field of metal heat treatment, in particular to an iron core heat treatment device and a process, wherein the iron core heat treatment device comprises a furnace table, an inner cover and a heating cover, the iron core is arranged at the top of the furnace table, an exhaust fan is arranged in the furnace table, the inner cover is sleeved outside the iron core and surrounds the iron core to form a first cavity, a ring plate is arranged on the inner wall surface of the inner cover, the ring plate faces to a gap between adjacent iron cores, the ring plate is used for guiding gas at the outer wall surface of the iron core from the gap between the adjacent iron cores to the inner wall surface of the iron core, the heating cover is sleeved outside the inner cover and surrounds the inner cover to form a second cavity, and a heat source is arranged in the second cavity and is used for heating the iron core; the iron core heat treatment process comprises loading, emptying, annealing, cooling and unloading. The iron core heat treatment device and the iron core heat treatment process provided by the application can distribute the hot air flow flowing through the inner wall surfaces of the iron cores at different heights, so that the inner wall surfaces of the iron cores at different heights are heated uniformly, and the heat treatment effect is improved.
Description
Technical Field
The application relates to the technical field of metal heat treatment, in particular to an iron core heat treatment device and an iron core heat treatment process.
Background
The iron core is widely applied to a main magnetic circuit of a transformer and is produced by rolling a sheet material which is rolled to be thinner; the iron core is used as a main magnetic circuit in the transformer, has high requirements on magnetic performance of the iron core, and needs annealing heat treatment after production is completed in order to eliminate stress and recrystallize to obtain better magnetic performance.
The hood-type annealing is the most widely applied mode, has the characteristics of strong product flexibility, small occupied area and low cost, and is widely applied to cold rolling annealing production lines. The hood-type annealing furnace generally comprises a shell, an inner hood, a furnace platform and an electrical control system, and when in operation, a workpiece is placed in the inner hood filled with protective atmosphere for uniform heating or cooling.
Chinese patent of publication No. CN114150116a discloses a hood-type annealing furnace, this hood-type annealing furnace includes the stove seat, stove seat top fixed mounting has the shell, be equipped with a plurality of combustion nozzles on the inner wall of shell, the inside stove platform that is equipped with of shell, the stove platform passes through slewing mechanism with stove seat top and rotates to be connected, stove platform top movable mounting has the inner cover, the stove platform top still is equipped with puts the thing subassembly, the installation cavity has been seted up to the stove platform inside, be equipped with circulation fan subassembly in the installation cavity, the gas vent that is linked together with the installation cavity has been seted up at stove platform top middle part, this hood-type annealing furnace can stagger each layer and put the thing board certain angle, the air current flows in the acceleration inner cover, guarantee the homogeneity that puts the work piece on the thing board and be heated to a certain extent.
However, in the actual use process, the inner wall surface of the workpiece is farther from the heat source than the outer wall surface, so that the temperature of the inner wall surface of the workpiece is lower than that of the outer wall surface in the heating process, and the heat of the hot gas is continuously absorbed in the process of driving the circulating fan to move from the inner wall surface of the uppermost workpiece to the inner wall surface of the lowermost workpiece, so that the inner wall surfaces of the workpieces with different heights are heated unevenly in the axial direction, and partial workpieces are not completely processed; for the iron core, the iron core treatment is incomplete and cannot reach the specified magnetic induction value, so that the qualification rate is reduced, and the production efficiency of the iron core is greatly influenced.
Disclosure of Invention
Based on this, it is necessary to provide an iron core heat treatment apparatus and process for solving the problem that the inner wall surfaces of iron cores of different heights in the conventional hood-type annealing furnace are heated unevenly in the axial direction, so that the treatment of part of the iron cores is incomplete and a predetermined magnetic induction value cannot be achieved, thereby reducing the yield.
The above purpose is achieved by the following technical scheme:
an iron core heat treatment device for annealing an iron core, the iron core having an inner wall surface and an outer wall surface, the iron core heat treatment device comprising:
a furnace table, wherein an exhaust fan is arranged in the furnace table and used for providing driving force for moving gas from the inner wall surface of the iron core to the outer wall surface of the iron core;
the number of the iron cores is N, N is more than or equal to 2, and the N iron cores are arranged on the furnace platform at intervals along the vertical direction;
the inner cover is detachably arranged on the hearth, the inner cover is sleeved outside the iron cores and surrounds the hearth to form a first cavity, the inner wall surface of the inner cover is provided with ring plates with the same number as the iron cores, N ring plates are arranged along the axis of the inner cover, when the inner cover is used, the uppermost ring plate is positioned above the uppermost iron cores, the rest N-1 ring plates are arranged opposite to the gaps between the adjacent iron cores, and the ring plates are used for guiding gas at the outer wall surface of the iron cores from the upper part of the uppermost iron cores or the gaps between the adjacent iron cores to the inner wall surface of the iron cores;
the heating cover can be detachably arranged on the furnace table, the heating cover is sleeved outside the inner cover and surrounds the furnace table to form a second cavity, a heat source is arranged in the second cavity, and the heat source is used for heating the iron core.
Further, the width of the annular plate gradually decreases from top to bottom along the axial direction of the inner cover.
Further, a plurality of arc plates are inserted in N-1 ring plates except the uppermost ring plate in a sliding manner along the radial direction, and the arc plates are connected in a sleeved mode end to end; the difference between the temperature of the outer wall surface and the temperature of the inner wall surface of the iron core is inversely related to the distance that the arc plate moves along the radial direction to the direction away from the center of the annular plate.
Further, N sections of telescopic rods are arranged on the top inner wall surface of the inner cover, wherein the uppermost section of telescopic rods is fixedly arranged on the top inner wall surface of the inner cover, the other N-1 sections of telescopic rods are fixedly connected to N-1 ring plates at one end of the telescopic rods, which is far away from the top inner wall surface of the inner cover, and the uppermost section of ring plates is fixedly arranged on the uppermost section of telescopic rods.
Further, a plurality of air guide grids are uniformly distributed on the lower end face of the annular plate along the circumferential direction.
Further, the iron core heat treatment device further comprises a cooling cover, the heating cover heats the iron core and is taken down from the furnace table, the cooling cover can be detachably arranged on the furnace table, the cooling cover is sleeved outside the inner cover and surrounds the furnace table to form a third cavity, and a cold source is arranged on the cooling cover and used for cooling the iron core.
Further, a plurality of air suction holes are uniformly formed in the circumferential wall surface of the cooling cover; the cold source comprises a cooling fan which is used for providing driving force for sucking air into the cooling cover from a plurality of air suction holes.
Further, the cold source comprises a spray header, wherein the spray header is arranged on the top inner wall surface of the cooling cover and is used for spraying water on the inner cover.
Further, the heat source comprises a heating wire.
The application also provides an iron core heat treatment process, which is applied to any one of the iron core heat treatment devices, and comprises the following steps:
s1, charging: placing an iron core on the top of a furnace table; sleeving an inner cover outside the iron core and clamping the inner cover with the furnace table;
s2, evacuating: filling nitrogen, hydrogen or inert gas into the inner cover to discharge air in the inner cover;
s3, annealing: sleeving a heating cover outside the inner cover and clamping the heating cover with the furnace table; heating the iron core through a heat source and lasting for a first preset time;
s4, cooling: after heating, removing the heating cover, cooling the iron core and continuing for a second preset time;
s5, unloading: after the inner cover is removed, the iron core is removed from the hearth.
The beneficial effects of the application are as follows:
the application relates to an iron core heat treatment device and a process, wherein the iron core heat treatment device comprises a furnace table, an inner cover and a heating cover, the iron core is arranged at the top of the furnace table, an exhaust fan is arranged in the furnace table, the inner cover is sleeved outside the iron core and surrounds the iron core to form a first chamber, a ring plate is arranged on the inner wall surface of the inner cover, the ring plate is opposite to a gap between adjacent iron cores, the ring plate is used for guiding gas at the outer wall surface of the iron core into the inner wall surface of the iron core from the gap between the adjacent iron cores, the heating cover is sleeved outside the inner cover and surrounds the iron core to form a second chamber, and a heat source is arranged in the second chamber and is used for heating the iron core; the iron core heat treatment process comprises loading, emptying, annealing, cooling and unloading. The iron core heat treatment device and the iron core heat treatment process provided by the application can distribute the hot air flow flowing through the inner wall surfaces of the iron cores at different heights, so that the inner wall surfaces of the iron cores at different heights are heated uniformly, and the heat treatment effect is improved.
Further, the width of the annular plate is gradually reduced from top to bottom along the axial direction of the inner cover, so that the hot air flow flowing to the inner wall surfaces of the iron cores at different heights is reasonably distributed, the inner wall surfaces of the iron cores at different heights are uniformly heated, and the heat treatment effect is improved.
Further, a plurality of arc plates are inserted in N-1 annular plates except the uppermost annular plate in a sliding manner along the radial direction, the arc plates are connected in a sleeved mode, the difference value between the temperature of the outer wall surface of the iron core and the temperature of the inner wall surface of the iron core is inversely related to the distance of the arc plates moving along the radial direction away from the circle center of the annular plate, so that the hot air flow flowing to the inner wall surfaces of the iron cores at different heights is uniformly distributed, the inner wall surfaces of the iron cores at different heights are uniformly heated, and the heat treatment effect and the production efficiency are improved.
Further, through setting up the telescopic link, the one end fixed connection that the top internal face of inner cover was kept away from to N-1 festival telescopic link is on N-1 annular plate, when the telescopic link drove the annular plate vertical downwardly moving, can drive partial nitrogen gas, hydrogen or inert gas downwardly moving to make nitrogen gas, hydrogen or inert gas fill up inside the inner cover fast, and then improve evacuation efficiency.
Further, a plurality of air guide grids are uniformly distributed on the lower end faces of the N-1 annular plates except the uppermost annular plate along the circumferential direction, and when the telescopic rod drives the annular plate to vertically move downwards, the air guide grids can drive more nitrogen, hydrogen or inert gas to move downwards so that the nitrogen, the hydrogen or the inert gas is quickly filled in the inner cover, and the emptying efficiency is improved.
Further, through set up the shower head on the top internal wall surface of cooling cover, the shower head is used for spraying water on the inner cover to make the inner cover quick cooling, and then make the iron core quick cooling.
Drawings
Fig. 1 is a schematic perspective view of a furnace table of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 2 is a schematic cross-sectional view of a furnace table of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 3 is a schematic front view of a heat treatment apparatus for iron core according to an embodiment of the present application;
fig. 4 is a schematic diagram of an assembly structure of a hearth and an inner cover of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of an inner cover of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 6 is a schematic diagram showing a cross-sectional structure of an inner cover of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 7 is a schematic diagram of an assembly structure of a furnace table, an inner cover and a heating cover of an iron core heat treatment apparatus according to an embodiment of the present application;
fig. 8 is a schematic diagram showing an assembly structure of a hearth, an inner cover and a cooling cover of an iron core heat treatment apparatus according to an embodiment of the present application.
Wherein:
100. a stove top; 101. an air suction port; 102. an air outlet; 110. an exhaust fan;
200. an inner cover; 210. a connecting valve; 220. a second driving cylinder; 230. a telescopic rod; 240. a ring plate; 241. an air guide grille; 250. an arc plate;
300. a heating mantle;
400. a cooling cover; 401. an air suction hole; 410. a cooling fan;
500. and (3) an iron core.
Detailed Description
The present application will be further described in detail below with reference to examples, which are provided to illustrate the objects, technical solutions and advantages of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The numbering of components herein, such as "first," "second," etc., is used merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
As shown in fig. 1 to 8, in an embodiment of the present application, an iron core heat treatment apparatus is provided for annealing an iron core 500, where the iron core 500 has an inner wall surface and an outer wall surface, and in this embodiment, the iron core heat treatment apparatus includes a furnace table 100, an inner cover 200, and a heating cover 300, the number of the iron cores 500 is N, N is a natural number greater than or equal to 2, N iron cores 500 are arranged at the top of the furnace table 100 at intervals along a vertical direction, and a gap exists between adjacent iron cores 500; an exhaust port 101 is provided at the top of the furnace table 100, the exhaust port 101 faces the inner wall surface of the iron core 500, an air outlet 102 is provided on the circumferential wall surface of the furnace table 100, the air outlet 102 corresponds to the outer wall surface of the iron core 500, an exhaust fan 110 is provided in the furnace table 100, and the exhaust fan 110 is used for providing driving force for sucking gas from the exhaust port 101 and discharging the gas from the air outlet 102.
The inner cover 200 is connected to the furnace platform 100 through a buckle in a clamping way or through a bolt, the inner cover 200 is sleeved outside the iron core 500 and surrounds the furnace platform 100 to form a first cavity, the inner wall surface of the inner cover 200 is provided with ring plates 240 the same as the iron cores 500 in number, N ring plates 240 are arranged in the vertical direction, when in use, the ring plate 240 positioned at the top is positioned above the iron cores 500 positioned at the top, the rest N-1 ring plates 240 are all arranged opposite to the gaps between the adjacent iron cores 500, in the cycle that the exhaust fan 110 sucks gas from the exhaust fan 101 and discharges the gas from the air outlet 102, the ring plates 240 can block part of the gas and guide the gas at the outer wall surface of the iron cores 500 to the inner wall surface of the iron cores 500 from the upper part of the iron cores 500 positioned at the top or the gaps between the adjacent iron cores 500 under the action of the exhaust fan 110, the inner cover 200 is provided with an exhaust valve and a connecting valve 210, the connecting valve 210 is used for connecting a gas tank when the first cavity discharges the air, and the gas tank can be a nitrogen tank, a hydrogen tank or an inert gas tank, and the exhaust valve in the first cavity is used for discharging the air; the heating mantle 300 is connected to the furnace table 100 through a fastening connection or through a bolt, the heating mantle 300 is sleeved outside the inner mantle 200 and surrounds the furnace table 100 to form a second chamber, a heat source is arranged in the second chamber, and the heat source heats the iron core 500 through heating the inner mantle 200, so that the iron core 500 is annealed.
Specifically, taking three iron cores 500 and three ring plates 240 as examples, for convenience of description, three iron cores 500 are respectively named as an upper iron core 500, a middle iron core 500 and a lower iron core 500 from top to bottom in a vertical direction, and three ring plates 240 are respectively named as an upper ring plate 240, a middle ring plate 240 and a lower ring plate 240, wherein the upper ring plate 240 is located above the upper iron core 500, the middle ring plate 240 faces a gap between the upper iron core 500 and the middle iron core 500, and the lower ring plate 240 faces a gap between the middle iron core 500 and the lower iron core 500.
The exhaust fan 110 and the heat source are started, the heat source heats the gas, and the exhaust fan 110 sucks the gas at the inner wall surface of the iron core 500 from the exhaust port 101 and discharges the gas to the outer wall surface of the iron core 500 from the air outlet 102, so that the gas flow circulation is formed; in the circulation process of the gas, assuming that the flow rate of the gas is a, for the same gas flow, when the gas flow moves to the lower ring plate 240 from bottom to top in the vertical direction, the gas of 0.1A is set to be blocked by the lower ring plate 240 and enters the inner wall surface of the iron core 500 from the gap between the middle iron core 500 and the lower iron core 500, and further the inner wall surface of the lower iron core 500 is heated; when the air flow continues to move from bottom to top in the vertical direction to the middle annular plate 240, the air of 0.1A is set to be blocked by the middle annular plate 240 and enters the inner wall surface of the iron core 500 from the gap between the upper iron core 500 and the middle iron core 500, thereby heating the inner wall surface of the middle iron core 500 and the inner wall surface of the lower iron core 500; when this air flow continues to move in the vertical direction from bottom to top to the top of the upper ring plate 240 and the inner cover 200, the air of 0.8A is set to enter the inner wall surface of the core 500, thereby heating the inner wall surface of the upper core 500, the inner wall surface of the middle core 500, and the inner wall surface of the lower core 500.
As the difference in temperature between the inner wall surface and the outer wall surface of the core 500 increases, the difference in heat absorbing capacity between the inner wall surface of the core 500 in the axial direction increases, and the flow direction of the gas flows from the inner wall surface of the core 500 to the outer wall surface of the core 500 and the outer wall surface of the core 500 is closer to the heat source than the inner wall surface, so that supplemental heating of the core 500 axially lower is more necessary; the ring plate 240 is used to distribute the hot air flowing through the inner wall surfaces of the iron cores 500 at different heights, so that the inner wall surfaces of the iron cores 500 at different heights are heated uniformly in the axial direction, thereby improving the heat treatment effect.
In some embodiments, the heat source is configured to include a heater wire that spirals inside the heating mantle 300, and when heating is desired, electricity is applied to the heater wire.
It will be appreciated that the heat source may also be configured to include a thermal circulation system that includes a heating device and a pipeline, the pipeline spiraling inside the heating enclosure 300, a heat-conducting medium flowing through the pipeline, and the heating device heating the heat-conducting medium and thereby transferring heat to the inner enclosure 200.
Taking the three cores 500 and the three ring plates 240 as an example, when the widths of the three ring plates 240 are the same, the gas flow rate entering from the gap between the upper core 500 and the middle core 500 is the same as the gas flow rate entering from the gap between the middle core 500 and the lower core 500, and the gas entering from the gap between the upper core 500 and the middle core 500 can heat the inner wall surface of the middle core 500 and the inner wall surface of the lower core 500, and the gas entering from the gap between the middle core 500 and the lower core 500 can heat the inner wall surface of the lower core 500, so that the temperature of the inner wall surface of the lower core 500 is higher than that of the middle core 500, resulting in that there is still a temperature difference between the inner wall surface of the upper core 500, the inner wall surface of the middle core 500, and the inner wall surface of the lower core 500, and the heat treatment effect of the core 500 is affected; on the basis of the above, the hot air flowing through the inner wall surfaces of the iron cores 500 at different heights can be adjusted by adjusting the different widths of the ring plates 240, so as to improve the non-uniform heating condition of the inner wall surfaces of the iron cores 500 in the axial direction.
In some embodiments, as shown in fig. 5, the width of the ring plates 240 is gradually reduced from top to bottom in the axial direction of the inner cover 200, taking three cores 500 and three ring plates 240 as an example, that is, the width of the ring plate 240 at the upper part is greater than the width of the ring plate 240 at the middle part, and the width of the ring plate 240 at the middle part is greater than the width of the ring plate 240 at the lower part; assuming that the flow rate of the gas is a, for the same gas flow, when the gas flow moves to the lower ring plate 240 from bottom to top in the vertical direction, the gas of 0.1A is set to be blocked by the lower ring plate 240 and enters the inner wall surface of the iron core 500 from the gap between the middle iron core 500 and the lower iron core 500, thereby heating the inner wall surface of the lower iron core 500; when the air flow continues to move from bottom to top in the vertical direction to the middle annular plate 240, the air of 0.2A is set to be blocked by the middle annular plate 240 and enters the inner wall surface of the iron core 500 from the gap between the upper iron core 500 and the middle iron core 500, thereby heating the inner wall surface of the middle iron core 500 and the inner wall surface of the lower iron core 500; when the air flow continues to move to the top of the upper annular plate 240 and the inner cover 200 from bottom to top in the vertical direction, the air of 0.7A is set to enter the inner wall surface of the iron core 500, and then the inner wall surface of the upper iron core 500, the inner wall surface of the middle iron core 500 and the inner wall surface of the lower iron core 500 are heated, so that the hot air flow flowing to the inner wall surfaces of the iron cores 500 at different heights is reasonably distributed, and then the inner wall surfaces of the iron cores 500 at different heights are uniformly heated in the axial direction, thereby improving the heat treatment effect.
In a further embodiment, as shown in fig. 5 and 6, a plurality of arc plates 250 are slidably inserted in the radial direction in each of N-1 ring plates 240 except the uppermost ring plate 240, the plurality of arc plates 250 are connected in a head-to-tail manner, driving force of each of the arc plates 250 moving in the radial direction of the ring plate 240 is provided by first driving cylinders, the number of which is the same as that of the arc plates 250, a plurality of first driving cylinders are provided on the ring plate 240, and an output shaft of one first driving cylinder is connected to one of the arc plates 250.
It will be appreciated that the first drive cylinder may be either a pneumatic cylinder or an electric cylinder.
As the heating process proceeds, the temperature difference between the inner wall surface and the outer wall surface of the iron core 500 may decrease, and at the same time, the smaller the temperature difference between the inner wall surfaces of the iron cores 500 in the axial direction is, the less the heat absorption capability difference between the inner wall surfaces of the iron cores 500 needs to be increased, and the lower the iron core 500 needs to be heated, at this time, the smoothness of the gas circulation in the inner cover 200 may be improved, so that the heat treatment effect of the iron core 500 may be improved, that is, the difference between the temperature of the outer wall surface and the temperature of the inner wall surface of the iron core 500 is inversely related to the distance that the arc plate 250 moves in the radial direction away from the center of the ring plate 240, that is, the smaller the distance that the arc plate 250 moves in the radial direction away from the center of the ring plate 240, so that the gas flow that the ring plate 240 may guide is, thereby improving the smoothness of the gas circulation in the inner cover 200.
It is understood that the temperature value of the inner wall surface and the temperature value of the outer wall surface of the core 500 may be obtained by the temperature sensor.
Taking three iron cores 500 and three ring plates 240 as an example, taking the temperature of the outer wall surface and the temperature of the inner wall surface of the middle iron core 500 as references, as the heating process proceeds, the difference between the temperature of the outer wall surface and the temperature of the inner wall surface of the middle iron core 500 gradually decreases, at this time, the corresponding arc plate 250 is driven by the first driving cylinder on the middle ring plate 240 to move along the direction away from the center of the ring plate 240 in the radial direction, the corresponding arc plate 250 is driven by the first driving cylinder on the lower ring plate 240 to move along the direction away from the center of the ring plate 240 in the radial direction, and the smaller the difference between the temperature of the outer wall surface and the temperature of the inner wall surface of the middle iron core 500 is, the larger the distance that the arc plate 250 on the middle ring plate 240 moves along the direction away from the center of the ring plate 240 in the radial direction is; assuming that the flow rate of the gas is a, for the same gas flow, when the gas flow moves to the lower ring plate 240 from bottom to top in the vertical direction, the gas of 0.05A is set to be blocked by the lower ring plate 240 and enters the inner wall surface of the iron core 500 from the gap between the middle iron core 500 and the lower iron core 500, thereby heating the inner wall surface of the lower iron core 500; when the air flow continues to move from bottom to top in the vertical direction to the middle annular plate 240, the air of 0.1A is set to be blocked by the middle annular plate 240 and enters the inner wall surface of the iron core 500 from the gap between the upper iron core 500 and the middle iron core 500, thereby heating the inner wall surface of the middle iron core 500 and the inner wall surface of the lower iron core 500; when this air flow continues to move in the vertical direction from bottom to top to the top of the upper ring plate 240 and the inner cover 200, the air of 0.85A is set to enter the inner wall surface of the core 500, thereby heating the inner wall surface of the upper core 500, the inner wall surface of the middle core 500, and the inner wall surface of the lower core 500.
It is to be understood that the temperature of the outer wall surface and the temperature of the inner wall surface of the upper core 500 may be used as a reference or the temperature of the outer wall surface and the temperature of the inner wall surface of the lower core 500 may be used as a reference.
In some embodiments, as shown in fig. 5, a second driving cylinder 220 is fixedly connected to the top outer wall surface of the inner cover 200 through bolts, the number of the telescopic rods 230 is N, wherein the number of the telescopic rods 230 is N, one section of the telescopic rods 230 positioned at the uppermost is fixedly arranged on the top inner wall surface of the inner cover 200, one end of the rest of the N-1 sections of the telescopic rods 230 far away from the top inner wall surface of the inner cover 200 is fixedly connected to N-1 ring plates 240, that is, one section of the telescopic rods 230 is arranged corresponding to one ring plate 240, and the ring plate 240 positioned at the uppermost is fixedly arranged on one section of the telescopic rods 230 positioned at the uppermost. Initially, the telescopic rod 230 is in a contracted state, N-1 ring plates 240 are stacked together, and when nitrogen, hydrogen or inert gas is filled into the first chamber, the second driving cylinder 220 drives the N-1 ring plates 240 to sequentially move to correspond to the gaps between the adjacent iron cores 500 through the telescopic rod 230 on one hand, and on the other hand, the N-1 ring plates 240 simultaneously drive part of the nitrogen, the hydrogen or the inert gas to move downwards, so that the nitrogen, the hydrogen or the inert gas is quickly filled into the inner cover 200, and the emptying efficiency is improved.
It is understood that the second driving cylinder 220 may employ either a pneumatic cylinder or an electric cylinder.
In other embodiments, the number of the second driving cylinders 220 and the telescopic rods 230 is set to be plural, thereby improving the movement stability of the N-1 ring plates 240.
In a further embodiment, as shown in fig. 5 and 6, a plurality of air guide grids 241 are uniformly distributed on the lower end surface of the ring plate 240 along the circumferential direction, when the telescopic rod 230 drives the N-1 ring plates 240 to move downwards along the axis of the inner cover 200, the air guide grids 241 can drive more nitrogen, hydrogen or inert gas to move downwards, so that the nitrogen, hydrogen or inert gas is quickly filled inside the inner cover 200, and the emptying efficiency is further improved.
In some embodiments, as shown in fig. 8, the iron core heat treatment apparatus further includes a cooling cover 400, after the heating cover 300 heats the iron core 500 and is removed from the furnace table 100, the cooling cover 400 is fastened to the furnace table 100 by a fastener or is connected by a bolt, the cooling cover 400 is sleeved outside the inner cover 200 and surrounds the inner cover to form a third chamber, and a cooling source is provided on the cooling cover 400, and is used for cooling the iron core 500.
In a further embodiment, as shown in fig. 8, a plurality of suction holes 401 are uniformly provided on the circumferential wall surface of the cooling jacket 400; the cooling source may be provided to include a cooling fan 410, and the cooling fan 410 is configured to provide a driving force for sucking air into the cooling jacket 400 from the plurality of air suction holes 401, and the air cools the inner jacket 200, thereby cooling the core 500.
In other embodiments, the cold source may further include a spray header disposed on the top inner wall surface of the cooling jacket 400, the spray header being configured to spray water onto the inner jacket 200, thereby cooling the core 500.
In combination with the above embodiment, the use principle and working process of the embodiment of the present application are as follows:
taking three iron cores 500 and three ring plates 240 as examples, for convenience of description, three iron cores 500 are respectively named as an upper iron core 500, a middle iron core 500 and a lower iron core 500 from top to bottom in the vertical direction, and three ring plates 240 are respectively named as an upper ring plate 240, a middle ring plate 240 and a lower ring plate 240, wherein the upper ring plate 240 is located above the upper iron core 500, the middle ring plate 240 is opposite to a gap between the upper iron core 500 and the middle iron core 500, and the lower ring plate 240 is opposite to a gap between the middle iron core 500 and the lower iron core 500.
The exhaust fan 110 and the heating wire are started, and the heating wire sucks the gas at the inner wall surface of the iron core 500 from the exhaust port 101 and discharges the gas to the outer wall surface of the iron core 500 from the air outlet 102 while heating the gas, so that the gas flow circulation is formed; in the circulation process of the gas, assuming that the flow rate of the gas is a, for the same gas flow, when the gas flow moves to the lower ring plate 240 from bottom to top in the vertical direction, the gas of 0.1A is set to be blocked by the lower ring plate 240 and enters the inner wall surface of the iron core 500 from the gap between the middle iron core 500 and the lower iron core 500, and further the inner wall surface of the lower iron core 500 is heated; when the air flow continues to move from bottom to top in the vertical direction to the middle annular plate 240, the air of 0.2A is set to be blocked by the middle annular plate 240 and enters the inner wall surface of the iron core 500 from the gap between the upper iron core 500 and the middle iron core 500, thereby heating the inner wall surface of the middle iron core 500 and the inner wall surface of the lower iron core 500; when this air flow continues to move in the vertical direction from bottom to top to the top of the upper ring plate 240 and the inner cover 200, the air of 0.7A is set to enter the inner wall surface of the core 500, thereby heating the inner wall surface of the upper core 500, the inner wall surface of the middle core 500, and the inner wall surface of the lower core 500.
And as the heating process proceeds, all the arc plates 250 on the ring plate 240 are driven by the first driving cylinder to move in a radial direction of the ring plate 240 in a direction away from the center of the ring plate 240.
The application also provides a heat treatment process of the iron core 500, which is applied to the heat treatment device of the iron core, wherein the heat treatment process of the iron core 500 comprises the following steps:
s1, charging: placing a plurality of iron cores 500 on top of the hearth 100 in a vertical direction; the inner cover 200 is sleeved outside the iron core 500, and the inner cover 200 is clamped with the hearth 100;
s2, evacuating: opening an exhaust valve on the inner cover 200, communicating a nitrogen tank, a hydrogen tank or an inert gas tank with a connecting valve 210 on the inner cover 200 through a pipeline, and filling nitrogen, hydrogen or inert gas into the inner cover 200 to exhaust air in the inner cover 200, and closing the exhaust valve and the connecting valve 210 when the filling preset time or the concentration of oxygen sensed by an oxygen concentration sensor at the exhaust valve is lower than a preset value;
s3, annealing: sleeving the heating mantle 300 outside the inner mantle 200 and clamping the heating mantle 300 with the furnace platform 100; energizing the heating wire to heat the iron core 500 for a first preset time;
s4, cooling: after the heating is finished, the heating cover 300 is removed, and the iron core 500 is cooled for a second preset time;
s5, unloading: after the inner cover 200 is removed, the iron core 500 is removed from the hearth 100.
It can be understood that the first preset time and the second preset time are both set time, and the preset value is a set oxygen concentration value.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. An iron core heat treatment device for annealing an iron core, the iron core having an inner wall surface and an outer wall surface, the iron core heat treatment device comprising:
a furnace table, wherein an exhaust fan is arranged in the furnace table and used for providing driving force for moving gas from the inner wall surface of the iron core to the outer wall surface of the iron core;
the number of the iron cores is N, N is more than or equal to 2, and the N iron cores are arranged on the furnace platform at intervals along the vertical direction;
the inner cover is detachably arranged on the hearth, the inner cover is sleeved outside the iron cores and surrounds the hearth to form a first cavity, the inner wall surface of the inner cover is provided with ring plates with the same number as the iron cores, N ring plates are arranged along the axis of the inner cover, when the inner cover is used, the uppermost ring plate is positioned above the uppermost iron cores, the rest N-1 ring plates are arranged opposite to the gaps between the adjacent iron cores, and the ring plates are used for guiding gas at the outer wall surface of the iron cores from the upper part of the uppermost iron cores or the gaps between the adjacent iron cores to the inner wall surface of the iron cores; the hot air flow flowing through the inner wall surfaces of the iron cores with different heights can be adjusted by adjusting the width of the annular plate;
the heating cover can be detachably arranged on the furnace table, the heating cover is sleeved outside the inner cover and surrounds the furnace table to form a second cavity, a heat source is arranged in the second cavity, and the heat source is used for heating the iron core.
2. The iron core heat treatment apparatus according to claim 1, wherein the width of the ring plate is gradually reduced from top to bottom in the axial direction of the inner cover.
3. The iron core heat treatment apparatus according to claim 2, wherein a plurality of arc plates are inserted in each of N-1 ring plates except the uppermost ring plate slidably in a radial direction, and the plurality of arc plates are connected in a head-to-tail manner; the difference between the temperature of the outer wall surface and the temperature of the inner wall surface of the iron core is inversely related to the distance that the arc plate moves along the radial direction to the direction away from the center of the annular plate.
4. The iron core heat treatment device according to claim 1, wherein N sections of telescopic rods are arranged on the top inner wall surface of the inner cover, wherein the uppermost section of telescopic rods is fixedly arranged on the top inner wall surface of the inner cover, one end, away from the top inner wall surface of the inner cover, of the rest N-1 sections of telescopic rods is fixedly connected to N-1 ring plates, and the uppermost section of ring plates is fixedly arranged on the uppermost section of telescopic rods.
5. The iron core heat treatment device according to claim 4, wherein a plurality of air guide grids are uniformly distributed on the lower end surface of the annular plate along the circumferential direction.
6. The iron core heat treatment apparatus according to claim 1, further comprising a cooling cover detachably provided on the hearth after the heating cover heats the iron core and is removed from the hearth, the cooling cover being provided outside the inner cover and surrounding the hearth to form a third chamber, and a heat sink provided on the cooling cover for cooling the iron core.
7. The iron core heat treatment apparatus according to claim 6, wherein a plurality of suction holes are uniformly provided on a circumferential wall surface of the cooling jacket; the cold source comprises a cooling fan which is used for providing driving force for sucking air into the cooling cover from a plurality of air suction holes.
8. The iron core heat treatment apparatus according to claim 6, wherein the cold source includes a shower head provided on a top inner wall surface of the cooling jacket, the shower head being configured to shower water on the inner jacket.
9. The core heat treatment apparatus according to claim 1, wherein the heat source comprises a heating wire.
10. A core heat treatment process, characterized by being applied to the core heat treatment apparatus as claimed in any one of claims 1 to 9, comprising the steps of:
s1, charging: placing an iron core on the top of a furnace table; sleeving an inner cover outside the iron core and clamping the inner cover with the furnace table;
s2, evacuating: filling nitrogen, hydrogen or inert gas into the inner cover to discharge air in the inner cover;
s3, annealing: sleeving a heating cover outside the inner cover and clamping the heating cover with the furnace table; heating the iron core through a heat source and lasting for a first preset time;
s4, cooling: after heating, removing the heating cover, cooling the iron core and continuing for a second preset time;
s5, unloading: after the inner cover is removed, the iron core is removed from the hearth.
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