JP3646341B2 - Induction heating device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an induction heating apparatus, and is particularly useful when applied to a longitudinal magnetic flux heating system.
[0002]
[Prior art]
An induction heating apparatus is known as an apparatus for heating a thin steel plate such as a strip. This induction heating apparatus includes a transverse magnetic flux heating type and a longitudinal magnetic flux heating type.
[0003]
FIG. 11 is an explanatory view conceptually showing the longitudinal magnetic flux heating type induction heating apparatus according to the prior art as viewed in plan. As shown in the figure, the heated member 1 such as a thin steel plate is heated by horizontally passing through the internal space formed by the induction heating coil 2. That is, an AC voltage is applied to the induction heating coil 2 by an AC power source 3, and a current is circulated in the thickness cross section of the member to be heated 1 by the magnetic flux generated and changed over time. The member 1 is heated.
[0004]
[Problems to be solved by the invention]
In the induction heating apparatus according to the related art as described above, the operator guides the leading end of the member to be heated 1 to the inlet opening of the induction heating coil 2 during the first plate-passing operation. At this time, in the induction heating apparatus, in order to increase the heating efficiency, the gap between the heated member 1 and the induction heating coil 2 is made as small as possible, whereas the induction heating coil 2 is protected against the heated member 1. Since no means is provided, the heated member 1 collides with the induction heating coil 2 to cause problems such as damage to the induction heating coil 2. Moreover, since the thin steel plate which is the to-be-heated member 1 is generally wound when it is wound in the coil shape, the plate-passing operation itself is not a simple operation.
[0005]
In addition to taking into account such problems, further consideration was given to preventing the heated member 1 from contacting the induction heating coil 2 due to the passage, the walking of the heated member 1 during heating (shift in the left-right direction), and the vertical movement (swing). The following induction heating devices have been proposed.
[0006]
(1) A gap between the member to be heated 1 and the induction heating coil 2 is increased by accepting a decrease in heating efficiency.
(2) Cement mold the entire induction heating coil 2.
{Circle around (3)} As shown in FIG. 12, a guide roll 4 is provided between the induction heating coils 2 to forcibly guide the slack of the heated member 1.
(4) A tensile attractive force is applied to the member 1 to be heated.
[0007]
However, if the gap is increased as shown in (1), the capacity of the equipment is naturally increased. In the cement mold of (2), there is a problem that the induction heating coil 2 cannot be repaired along with a significant increase in cost.
[0008]
In the case of {circle around (3)}, there is a problem that when the guide roll 4 comes into contact with the member to be heated 1, a spark is generated and a spark flaw is generated on the member to be heated 1. Further, as in the case of (4), there is a problem that walking and vertical movement do not become zero even when a tensile tension is applied.
[0009]
An object of the present invention is to provide an induction heating apparatus capable of preventing damage to the induction heating coil due to the first plate operation for the induction heating coil and the passage plate at the time of induction heating in view of the above prior art.
[0010]
[Means for Solving the Problems]
The configuration of the present invention that achieves the above object is as follows.
In the induction heating apparatus configured to induction-heat the heated member by horizontally passing a plate-like heated member such as a strip through the internal space formed by the induction heating coil,
Insulating plates that extend in the threading direction at the upper and lower parts of the internal space of the induction heating coil are arranged at a plurality of locations in a direction perpendicular to the threading direction so that the heated member and the induction heating coil are not in direct contact. Set up
Induction heating is performed between the washer and the insulating plate by connecting the washer placed between adjacent wires in the plate direction of the induction heating coil and the insulating plate with a bolt passing through the gap between the wires. The coil is configured to be held.
[0016]
[Action]
According to the present invention having the above construction, when heating by moving the induction heating within the coil, the heated member also occurred walking or vertical movement of the member to be heated is restricted its position by the insulation plate Therefore, it does not collide with the induction heating coil.
[0017]
【Example】
Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, the same number is attached | subjected to the part same as a prior art, and the overlapping description is abbreviate | omitted.
[0018]
FIG. 1 is a plan view showing an induction heating apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line AA, and FIG. 3 is a sectional view taken along line BB. As shown in FIGS. 1 to 3, the induction heating apparatus of this embodiment is obtained by adding an insulating case 5 and an insulating guide case 6 to the induction heating apparatus according to the prior art shown in FIG. 11.
[0019]
The insulating case 5 is a cylindrical insulating member formed so that the heated member 1 can pass through the internal space, and is configured to protect the inner peripheral surface of the induction heating coil 2 from the collision of the heated member 1 and the like. It is. The insulating guide case 6 has an opening dimension in the vertical direction toward the opening 7 on the end surface on the inlet side of the induction heating coil 2 so that the position of the heated member 1 is regulated and guided to the internal space of the induction heating coil 2. Is a cylindrical insulating member that gradually decreases.
[0020]
4 is a left side view of the insulating case 5, FIG. 5 is a plan view thereof, FIG. 6 is a front view of the insulating guide case 6, and FIG. 7 is a plan view thereof.
[0021]
In this embodiment, the insulating case 5 and the insulating guide case 6 are integrally connected. Therefore, the opening 8 of the insulating case 5 and the opening 9 on the induction heating coil 2 side of the insulating guide case 6 are formed in the same shape.
[0022]
In the first plate passing operation in this embodiment, the heated member 1 is guided by the insulating guide case 6 and inserted into the internal space of the induction heating coil 2, that is, the internal space of the insulating case 5. At this time, since the opening of the insulating guide case 6 has a larger diameter than the induction heating coil 2 side, even if the member 1 to be heated is slightly shaken in the vertical direction, even if some wrapping remains. This plate passing operation can be easily performed.
[0023]
After the plate passing operation is completed, the heated member 1 is transferred through the induction heating coil 2 to perform induction heating. During this transfer, the heated member 1 walks or moves up and down. Even so, the induction heating coil 2 is protected by the insulating case 5 and is not damaged.
[0024]
In this embodiment, the insulating guide case 6 is configured such that the opening dimension in only the vertical direction is gradually reduced, and the same opening dimension is used in the left-right direction. This is because a side guide (not shown) is provided outside the entrance side of the coil 2 so as to regulate the positions of the left and right end faces of the heated member 1, and at least the opening dimension in the vertical direction is gradually reduced. As long as it is configured, it is not limited to the configuration of the present embodiment.
[0025]
In this embodiment, the insulating case 5 and the insulating guide case 6 are integrally connected. However, only the insulating case 5 or only the insulating guide case 6 may be used as necessary.
[0026]
FIG. 8 is a plan view showing an induction heating apparatus according to the second embodiment of the present invention, and FIG. 9 is a left side view thereof.
[0027]
As shown in both figures, this embodiment uses an insulating plate 10 instead of the insulating case 5 in the first embodiment. The insulating plate 10 is perpendicular to the plate passing direction so as to extend in the plate passing direction in the upper and lower portions of the internal space of the induction heating coil 2 so that the heated member 1 and the induction heating coil 2 do not directly contact each other. Are arranged at a plurality of locations (three locations in this embodiment ) in various directions (left and right directions) .
[0028]
FIG. 10 is an enlarged view in which a corresponding portion is extracted in order to explain the fixing structure of the insulating plate 10. As shown in the figure, the insulating plate 10 is formed by connecting the washer 11 and the insulating plate 10 placed between the adjacent wires 2a, 2a in the plate direction of the induction heating coil 2 to the wires 2a, 2a. The induction heating coil 2 is clamped between the washer 11 and the insulating plate 10 by being connected by a bolt 12 passing through a gap therebetween and a nut 13 into which the bolt 12 is screwed.
[0029]
In this embodiment as well, the induction heating coil 2 is protected by the insulating plate 10 as in the first embodiment, but the configuration is simpler than the case of the insulating case 5 and the cost is low. Can do.
[0030]
It should be noted that the insulating guide case 6 can be freely combined with this embodiment, and when combined, the same operation and effect as the first embodiment can be obtained when passing through the plate. The insulating plate 10 may be disposed on both the left and right sides of the internal space of the induction heating coil 2. In this case, the vertical part of the induction heating coil 2 is also protected.
[0031]
【The invention's effect】
As concretely described in conjunction with above embodiments, the present invention may prevent collision to the induction heating coil in the transport of the heating member.
[Brief description of the drawings]
FIG. 1 is a plan view showing an induction heating apparatus according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a left side view of the insulating case according to the embodiment.
FIG. 5 is a plan view of FIG. 4;
FIG. 6 is a front view of an insulating guide case according to the embodiment.
7 is a plan view of FIG. 6. FIG.
FIG. 8 is a plan view showing an induction heating apparatus according to a second embodiment of the present invention.
9 is a left side view of FIG.
FIG. 10 is an enlarged view in which a corresponding portion is extracted in order to explain the fixing structure of the insulating plate.
FIG. 11 is an explanatory view conceptually showing a case where a longitudinal magnetic flux heating type induction heating apparatus according to the prior art is viewed in a plane.
FIG. 12 is an explanatory diagram conceptually showing an induction heating apparatus according to the prior art in which a guide roll is provided between induction heating coils.
[Explanation of symbols]
1 Heated Member 2 Induction Heating Coil 2a Wire 5 Insulating Case 6 Insulating Guide Case 10 Insulating Plate 11 Washer 12 Bolt

Claims (1)

In the induction heating apparatus configured to induction-heat the heated member by horizontally passing a plate-like heated member such as a strip through the internal space formed by the induction heating coil,
Insulating plates that extend in the threading direction at the upper and lower parts of the internal space of the induction heating coil are arranged at a plurality of locations in a direction perpendicular to the threading direction so that the heated member and the induction heating coil are not in direct contact. Set up
Induction heating is performed between the washer and the insulating plate by connecting the washer placed between adjacent wires in the plate direction of the induction heating coil and the insulating plate with a bolt passing through the gap between the wires. An induction heating device configured to hold a coil.

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