JP2001068258A - Induction heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating device capable of supporting inductors to be movable laterally and vertically so as to carry out working in an elevated position at the time of maintenance, and capable of coping with a plate height change of a heated material. SOLUTION: Heating coils are wound respectively in open leg parts of a C-shaped iron core 4 to form inductors 5, 5, the iron core 4 is supported in a heater supporting part 3, and wheels 6 are provided laterally in both upper sides thereof. The wheels 6 are attached to travel freely on a rail 7 attached an upper face of a gate type frame 2 orthogonal to a conveying direction of a heated material 1, a jack 11 is attached to an upper side of the rail 7 of the heater supporting part 3, and the jack 11 is extended to support elevatably the whole heater supporting part 3 on the rail 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an inductor raising and lowering mechanism for induction heating a material to be continuously conveyed.

[0002]

2. Description of the Related Art Generally, in a hot rolling line for steel, a plate-shaped material to be heated (slab) heated in advance to a high temperature in a heating furnace is continuously processed into a thin plate by passing through a rolling mill. . When a thin plate is rolled by such a steel hot rolling line, the temperature of the plate-like material heated by the heating furnace decreases while traveling on the line. Once the temperature is raised, the edge is cooled during running, so the edge is heated by an edge heater that heats the edge locally, and the whole is brought to a substantially uniform temperature state. I have.

In this edge heater, a heating coil is wound around each of the open legs of a C-shaped iron core to form an inductor.
An induction heating device is used in which a material to be heated is passed between the inductors to perform induction heating. In this conventional induction heating apparatus, as shown in FIG. 7, a portal frame 2 is provided orthogonal to the direction in which the material 1 to be heated is conveyed. Have been. As shown in FIG. 8, C-shaped iron cores 4 and 4 are attached in parallel on the lower side of the heater support portion 3, and heating coils are wound around the open legs to form inductors 5 and 5, respectively. The material to be heated 1 passes between the upper and lower inductors 5 and 5.

As shown in FIG. 8, wheels 6 are provided on both sides of the upper portions of the heater supports 3, 3, and the wheels 6, which are mounted on the upper surface of the portal frame 2,
7, the distance between the left and right inductors 5, 5 can be adjusted according to the plate width of the material 1 to be heated, as shown in FIG.

In this conventional induction heating apparatus, a running mechanism is provided to support the inductors 5 and 5 so that the inductors 5 and 5 can run left and right. Therefore, not only can the interval be adjusted according to the plate width of the material 1 to be heated, but also the inductors can be adjusted. When 5 and 5 are not used or when maintenance is performed, it can be evacuated from the line.

The inductors 5, 5 receive high-temperature radiant heat over a long period of time because they are disposed close to the material 1 to be induction-heated to about 1200 ° C., and steam injected from the scale removing device. In addition, since the heating coils, the heat-resistant plate, the exterior plate, and the like constituting the inductors 5 and 5 need to be maintained because they are affected by the scattered scale.

When the maintenance is performed, the inductors 5 and 5 provided with the traveling mechanism are moved to the left and right and retracted from the line. The pass line of the material to be heated 1 is set at a height of 700 to 1000 mm from the floor surface. The lower inductor 5 provided on the lower side of the C-shaped iron core 4 is mounted at a lower position. For this reason, maintenance work must be performed at a low position, and the drive shaft, motor, wiring, etc. of the guide rolls 9 are arranged on the floor 8 in a complicated manner, so that workability in this low place is poor. In addition, since the conventional induction heating device is only supported so as to be able to travel left and right, it is necessary to adjust the heights of the inductors 5 and 5 in response to a change in the plate height position of the material 1 to be heated (thread passing height). Could not.

[0008]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned drawbacks and allows the inductor to be movably supported up and down and up and down so that work can be performed at a high position at the time of maintenance. An object of the present invention is to provide an induction heating device that can respond to a change in position.

[0009]

According to a first aspect of the present invention, there is provided an induction heating apparatus in which a heating coil is wound around each of open legs of a C-shaped iron core to form an inductor. , And wheels are provided laterally on both sides of the upper portion, and the wheels are movably mounted on rails mounted on the upper surface of a portal frame orthogonal to the conveying direction of the material to be heated. A jack is mounted above the rail of the support, and the jack is extended to support the entire heater support on the rail so as to be able to move up and down.

In the induction heating apparatus according to a second aspect of the present invention, a heating coil is wound around each of the open legs of the C-shaped iron core to form an inductor, and the C-shaped iron core is supported by the heater support. A traveling frame is provided on an upper part of a portal frame orthogonal to the conveying direction of the material to be heated. In addition to supporting the entire heater support portion so as to be able to move up and down, wheels are provided laterally on both sides of the running frame, and the wheels are mounted so as to be able to run on rails mounted on the upper surface of the portal frame. Is what you do.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described in detail with reference to FIG. In this induction heating apparatus, as shown in FIG. 1, a portal frame 2 is provided orthogonal to the direction of transport of the material 1 to be heated, and heater supports 3, 3 are attached to the portal frame 2 so as to face each other. ing. As shown in FIG. 2, C-shaped iron cores 4 and 4 are attached in parallel on the lower side of the heater support portion 3, and heating coils are wound around the opening legs to form inductors 5 and 5, respectively. The material to be heated 1 is allowed to pass between the inductors 5 and 5.

As shown in FIG. 2, wheels 6 are provided on both sides of the upper portions of the heater supports 3, 3, and the wheels 6 are mounted on rails 7 mounted on the upper surfaces of the portal frames 2, 2. , 7. Jack supports 10 and 10 are provided on the right and left upper portions of the heater support 3, and jacks 11 and 11 are mounted on both ends of the heater support 3 at positions above the rails 7 and 7, respectively. An inverted concave support block 12 fitted to the rail 7 is attached to the lower end of the support block.

In the above-mentioned apparatus, the heated material 1 previously heated to a high temperature in a heating furnace or the continuously cast
, And in the middle of the line, the induction heating device C
Both ends are locally induction-heated by passing between upper and lower inductors 5 and 5 attached to the core 4. Material to be heated 1
Are connected to a motor (not shown), the wheels 6 rotate and run on the rails 7 to adjust the distance between the left and right inductors 5.

Further, since the inductors 5 and 5 are arranged close to the material 1 to be heated, they receive high-temperature radiant heat for a long period of time, and are affected by water vapor injected from the scale removing device and scattered scale. Therefore, it is necessary to maintain the heating coils of the inductors 5, 5, the heat-resistant plate, the exterior plate, and the like.

When performing this maintenance, the wheels 6 provided on the heater support 3 are rotated to move the heater support 3 on rails 7 as indicated by arrows in FIG. Let it. Thereafter, when the jack 11 is driven to extend the cylinder 13 as shown in FIG. 3, the inverted concave support block 12 attached to the tip of the cylinder 13 descends and fits on the rails 7,7.

When the jack 11 is further rotated, as shown in FIGS. 3 and 4, the heater supporting portions 3, 3 are raised and float on the portal frame 2 with the four jacks 11 like the outriggers. Becomes As described above, maintenance can be performed with the lower inductor 5 raised, so that inspection and repair work on the bottom of the inductor can be easily performed.

FIGS. 5 and 6 show another embodiment of the present invention. A rectangular frame-shaped traveling frame 14 is provided on front and rear portal frames 2, 2, and the left and right side surfaces of the traveling frame 14 are shown. Are mounted on the rails 7 and 7 mounted on the portal frame 2. The heater supports 3, 3 are formed in a convex shape, and the upper portion thereof penetrates the inside of the rectangular frame-shaped traveling frame 14 and protrudes upward, and the jack support portion 10 is connected to the upper portion. A jack 11 is attached to the jack support 10 downward.
The lower end of the cylinder 13 is connected to the upper surface of the traveling frame 14.

In the above apparatus, when changing the plate width of the material 1 to be heated, wheels 6,... Connected to a motor (not shown) are rotated and run on rails 7, 7, so that the inductor 5,
Adjust the interval of 5. Also, when the plate height position of the material to be heated 1 changes, the jack 11 is driven to rotate the cylinder 1.
When 3 is expanded and contracted, the heater support portions 3 and 3 move up and down,
The height of the inductors 5, 5 can be adjusted.

When the maintenance is performed, the wheels 6 are rotated, and the heater supports 3, 3 are moved to move left and right. Thereafter, when the jack 11 attached to the jack supporting portion 10 is driven to extend the cylinder 13, the tip of the cylinder 13 is connected to the upper surface of the traveling frame 14 having a rectangular frame shape. The support portions 3, 3 are raised and supported by the four jacks 11 in a state of being floated on the portal frame 2, so that the maintenance work of the lower inductor 5 can be easily performed.

In the above description, the case where two C-shaped iron cores 4 and 4 are mounted in parallel on one heater supporting portion 3 is shown, but a structure in which one C-shaped iron core 4 is mounted may be used.

[0021]

As described above, claim 1 according to the present invention.
According to the induction heating device described above, a jack is attached to the heater supporting portion that supports the inductor, the jack is extended, and the entire heater supporting portion is supported on the rail attached to the portal frame so as to be able to move up and down freely. Since the inductor is movably supported to the left and right and up and down, the jack can be rotated during maintenance to raise the heater support part and support it in a state of floating above the portal frame to work at a high position. In addition, by raising and lowering the inductor, it is possible to cope with a change in the plate height position of the material to be heated.

According to the induction heating device of the present invention, a traveling frame is provided on the upper part of the portal frame, and the traveling frame is made to penetrate the upper side of the heater supporting portion, so that the heater supporting portion and the traveling frame are connected to each other. The upper part is connected with a jack to support the entire heater support part up and down, and the inductor is supported movably up and down and up and down. When performing maintenance, extend the jack cylinder and extend the tip of this jack. The maintenance work of the inductor can be easily performed by supporting the heater support on the running frame connected to the, and the change in the plate height position of the material to be heated can be performed by raising and lowering the inductor. Can also respond.

[Brief description of the drawings]

FIG. 1 is a front view of an induction heating device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the induction heating device shown in FIG.

FIG. 3 is a front view showing a state where a heater supporting portion of the induction heating device shown in FIG. 1 is raised.

FIG. 4 is a vertical sectional side view showing a state where a heater supporting portion of the induction heating device shown in FIG. 2 is raised.

FIG. 5 is a vertical sectional side view of an induction heating device provided with a traveling frame according to another embodiment of the present invention.

6 is a vertical sectional side view showing a state where a heater supporting portion of the induction heating device shown in FIG. 5 is raised.

FIG. 7 is a front view showing a conventional induction heating device.

8 is a vertical sectional side view of the induction heating device shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heated material 2 Gate frame 3 Heater support part 4 C-shaped iron core 5 Inductor 6 Wheel 7 Rail 8 Floor surface 9 Guide roll 10 Jack support part 11 Jack 12 Support block 13 Cylinder 14 Traveling frame

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuji Doizaki 1-1-1, Shibaura, Minato-ku, Tokyo F-term in the head office of Toshiba Corporation (reference) 3K059 AA08 AB19 AB26 AB28 AD05 AD40 CD52 CD75 CD79

Claims (2)

[Claims] A heating coil is wound around each of the open legs of the C-shaped iron core to form an inductor. The C-shaped iron core is supported by a heater support, and wheels are provided laterally on both sides of the upper part. The wheels are mounted on rails mounted on the upper surface of the portal frame perpendicular to the conveying direction of the material to be heated so as to run freely, and jacks are mounted above the rails of the heater support, and the jacks are extended. An induction heating apparatus characterized in that the entire heater supporting portion is supported on a rail so as to be movable up and down. 2. An inductor is formed by winding a heating coil around each of the open legs of the C-shaped iron core, and the C-shaped iron core is supported by the heater support portion, and the portal frame is orthogonal to the conveying direction of the material to be heated. A traveling frame is provided at the top of the heater frame, and the upper side of the heater support portion is penetrated through the traveling frame, and the heater support portion and the upper portion of the traveling frame are connected by a jack to support the entire heater support portion vertically. In addition, an induction heating device characterized in that wheels are provided laterally on both sides of a traveling frame, and the wheels are movably mounted on rails mounted on the upper surface of a portal frame.