JP2001217064A - Induction heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating device with a simplified structure and easy to adjust the height of bus-line as well as to execute inspection and replacement or the like, by making solenoid coil, high-frequency power source or the like retreated, even when the side space in the rolling mill is limited. SOLUTION: With the induction heating device in which a sheet material 1 continuously runs through a cylindrical heating passage 9 formed inside a solenoid coil and induction heats a whole body, the solenoid coil 8 and a high-frequency power unit 11 equipped with a capacitor or the like for supplying power are fixed with an escalating frame 17, which is supported by a gate-like pedestal 16, in free escalation inside, an at the same time, a guide roller 18, set up in protrusion at both left and right sides of the frame 17, is supported by left and right guide rails 23 fitted in a longitudinal direction inside the pedestal 16, to make the solenoid coil 8 and the high-frequency power unit 11 escalate freely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an induction heating apparatus for heating an entire plate-like material to be heated conveyed on a hot rolling line for steel in the middle of the line.

[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 passed through a rolling mill to be processed into a thin plate. I have. When a thin plate is rolled in such a steel hot rolling line, the distance from the heating furnace to the rolling mill is long, so that there is a problem that the temperature drops before reaching the rolling mill.

[0003] For this reason, the plate-shaped material to be heated is heated in the middle of the line to once raise the overall temperature, and then both ends are locally heated by an edge heater, or through the reverse process, the plate-shaped material is heated. The whole of the material to be heated is maintained at a substantially uniform temperature state, and is sequentially rolled into a thin plate through a rolling mill.

[0004] As described above, an induction heating apparatus for heating the entire plate-shaped material to be heated in the middle of the line to increase the temperature is a cylindrical member provided inside a solenoid coil which is elongated in the width direction of the plate-shaped material to be heated. Is formed, and a plate-like material to be heated is passed through the heating passage so that the whole is induction-heated.

In addition, in the induction heating apparatus, a heater main body which is affected by radiant heat from a plate-like material to be heated to a high temperature is most easily damaged, and it is necessary to perform maintenance such as inspection and replacement of parts. In such a case, only the induction heating device that performs inspection and repair is withdrawn from the rolling line in the horizontal direction without stopping the line to perform the operation.

As a conventional induction heating device having a structure to be retracted in the lateral direction, for example, as shown in FIG.
Rail 2 is laid perpendicular to the rolling line where
On this rail 2, an L-shaped heater cart 3, a rectangular parallelepiped heater body 4 mounted thereon, and an inverted L-shape which is detachably connected so as to be overlapped on the heater body 4 at the same time. And the power trolley 5 described above.

The heater body 4 is provided inside a solenoid coil 8 which is horizontally elongated in the width direction of the plate-like material 1 to be heated.
A cylindrical heating passage 9 is formed. The power supply cart 5 is formed in an inverted L shape, a high frequency power supply section 11 provided with a capacitor, a control circuit and the like is provided inside the horizontal section, and a drive wheel 12 connected to a motor is provided below the vertical section.
Is mounted so as to travel on the rail 2. A plurality of the induction heating devices are installed along a rolling line on which the plate-like material 1 is conveyed, and table rollers 7 are arranged between them.

When performing maintenance such as inspection and replacement of parts of the induction heating device, for example, as shown in FIG. 5, a heater truck connected integrally with the power truck 5 by rotating drive wheels 12 attached to the power truck 5. The heater body 3 is moved on the rail 2 and retreated laterally from the rolling line to check the heater body 4.

When the heater body 4 of the induction heating device is replaced, the power supply truck 5 and the L-shaped heater truck 3 are replaced.
After the connection with the power supply truck 5 is released as shown in FIG.
Is further retracted, the heater body 4 placed on the separated heater carriage 3 is lifted and moved by a crane, and another heater body 4 to be replaced is carried in and placed on the heater carriage 3. To end the exchange.

However, the conventional apparatus has a structure in which the heater carriage 3 provided with the heater body 4 and the inverted L-shaped power supply carriage 5 move laterally on the rail 2 laid perpendicular to the rolling line. However, there is a problem that it can be installed only when there is a sufficient space in the lateral direction. Further, the motor 13 for driving the table roller 7 must be installed on the side opposite to the retreat direction due to space, and can be installed only in a place where a sufficient space in the lateral direction can be secured.

Further, since the rail 2 is laid across the pits 14 provided on the floor along the rolling line, a sufficient reinforcing structure for supporting the weight of the induction heating device is required. There is also a problem that the scale scattered from 1 accumulates on the rail 2 and hinders traveling. Furthermore, since the installation height of the solenoid coil 8 is constant, the height of the pass line cannot be adjusted due to a change in the thickness of the plate-like material 1 to be heated.

[0012]

SUMMARY OF THE INVENTION The present invention eliminates the above-mentioned disadvantages, simplifies the structure because there is no rail for running the bogie in the lateral direction, and allows the solenoid coil or the coil to be used even when the lateral space of the rolling line is small. It is an object of the present invention to provide an induction heating apparatus in which inspection and replacement work can be easily performed by retracting a high-frequency power supply unit, and the height of a pass line can be easily adjusted in accordance with a change in plate thickness of a plate-like material to be heated.

[0013]

In the induction heating apparatus according to the first aspect of the present invention, a plate-like material to be heated continuously travels through a cylindrical heating passage formed inside a solenoid coil, and the whole is guided. In an induction heating device for heating, a solenoid coil and a high-frequency power supply device including a capacitor for supplying power to the solenoid coil are mounted on a lifting frame, and the lifting frame is supported inside a portal frame so as to be movable up and down. The guide rollers protruding from the left and right sides of the frame are supported on the left and right guide rails vertically mounted inside the portal frame, and the solenoid coil and the high frequency power supply are supported so as to be able to move up and down. is there.

An induction heating apparatus according to a second aspect of the present invention comprises:
The lifting frame is characterized in that it is connected to the lower end of a jack, cylinder, or ball screw attached downward from the upper part of the portal frame so as to be able to move up and down. Further, the induction heating device according to the third aspect is characterized in that the elevating frame is provided at a position perpendicular to the path line on which the plate-shaped material to be moved travels.
It is characterized in that two solenoid coils are mounted.

[0015]

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 the figure, 16
Is a portal frame, on which an elevating frame 17 is provided. The heater body 4 and the high-frequency power supply unit 11 are attached to the lifting frame 17. In the heater body 4, a cylindrical heating passage 9 is formed inside a solenoid coil 8 that is horizontally elongated in the plate width direction of the plate-like heated material 1. As shown in FIG. 2, two lifting frames 17 are mounted inside the portal frame 16, and each lifting frame 17 supports two heater bodies 4, 4 and one high-frequency power supply unit 11, respectively. Have been.

FIG. 1 shows the left and right sides of the lifting frame 17.
As shown in FIG. 7, the guide rollers 18, 18 are provided to project in the lateral direction. In addition, the upper part of the lifting frame 17 is
Jacks 19, 19 mounted downward from the top of
Suspended. This jack 19 is connected to the
The left and right jacks 19 are driven by the rotation of the motor 21 to move the lifting frame 17 up and down.

The left and right columns 2 constituting the portal frame 16
Guide rails 23 are vertically mounted on the sides 2 and 22, and guide rollers 18 projecting from the left and right sides of the elevating frame 17 run there.

As shown in FIG. 1, the induction heating apparatus having the above-described structure has the heater main body 4 with the lifting frame 17 lowered.
The heating path 9 is set in accordance with the pass line, and the plate-like material 1 is passed through the heating path 9 and the whole is induction-heated by the solenoid coil 8.

When performing maintenance such as inspection of the induction heating device and replacement of parts, when the motor 21 mounted on the upper part of the gate type gantry 16 is rotated, the jacks 19 connected to both sides of the motor 21 are driven. Jack 1 as shown
The elevating frame 17 hung on 9 moves upward. The heater main body 4 to be maintained in this way is raised and retracted from the line, and the maintenance is performed from both sides of the heater main bodies 4 and 4 at the upper part of the portal frame 16.

In this case, as shown in FIG. 2, two elevating frames 17, 17 are mounted inside one portal type frame 16, and two elevating frames 17 are further provided with two heater bodies 4, 4, respectively. A total of four heater bodies 4 are arranged side by side at a narrow interval, but only the elevating frame 17 to which the heater body 4 for maintenance is attached is raised to the upper side of the portal frame 16 so that the heater body Since a sufficient work space can be secured on both sides of the work 4 and 4, the work can be easily performed.

Therefore, there is no rail running in the lateral direction, the structure can be simplified, and the apparatus can be installed in a place where the lateral space of the rolling line is small. Further, since the motor 13 for driving the table roller 7 does not buffer in the retreating direction as in the related art, it can be installed inside the portal frame 16, and the induction heating device can be installed in a place where a sufficient horizontal space cannot be secured. Can be.

Further, when adjusting the height of the pass line by changing the thickness of the plate-like material 1 to be heated, the jack 1
The height of the heating passage 9 of the heater main body 4 can be easily adjusted by changing the height of the lifting frame 17 by driving the 9. Further, since there is no rail 2 crossing over the pit 14 unlike the conventional case, the support structure can be simplified, and
There is no problem that the scale scattered from the plate-shaped material to be heated 1 accumulates on the rail 2.

In the above description, the case where the jack 19 is used for raising and lowering the lifting frame 17 has been described, but a structure in which the jack 19 is raised and lowered by a cylinder or a ball screw may be used.

[0024]

As described above, claim 1 according to the present invention.
According to the induction heating device described above, there is no rail for moving the cart in the lateral direction, the structure can be simplified, and it can be installed in a factory where the installation space in the lateral direction of the rolling line is small. In addition, since the solenoid coil and high-frequency power supply unit are retracted to the upper side of the gate-shaped gantry to perform inspection and replacement work, the work can be performed easily, and the height of the pass line accompanying the change in the thickness of the plate-like heated material Adjustment is also easy.

According to the induction heating device of the second aspect, the elevating frame is connected to the lower end of a jack, a cylinder or a ball screw provided downward from the upper part of the portal frame so as to be able to move up and down. The structure is simple and can be moved up and down with certainty, and fine adjustment according to the change of the pass line can be easily performed.

According to the third aspect of the present invention, two solenoid coils are attached to the elevating frame at right angles to the path line on which the plate-like material to be heated travels.
By raising the lifting frame to the upper side of the portal frame, a sufficient working space can be secured on both sides of the heater main body, and maintenance and replacement work are easy.

[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 side view showing the induction heating device of FIG.

FIG. 3 is a front view of the induction heating device showing a state where the lifting frame of FIG. 1 is raised.

FIG. 4 is a front view showing a conventional induction heating device that moves laterally on a rail.

FIG. 5 is a front view showing a state where the induction heating device shown in FIG. 4 is retracted from a rolling line.

6 is a front view showing a state where an L-shaped heater cart and an inverted L-shaped power cart of the induction heating apparatus shown in FIG. 5 are separated.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate-shaped heated material 2 rail 3 L-shaped heater cart 4 heater body 5 inverted L-shaped power cart 7 table roller 8 solenoid coil 9 heating passage 11 high-frequency power supply section 13 motor 14 pit 16 portal frame 17 elevating frame 18 guide Roller 19 Jack 23 Guide rail

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Dogami, Inventor K1-1, Shibaura, Minato-ku, Tokyo F-term in the head office of Toshiba Corporation (reference) 3K059 AB17 AB26 AC15 AC54 AC68 AD37 AD40 CD75

Claims (3)

[Claims] 1. An induction heating device in which a plate-shaped material to be heated continuously travels through a cylindrical heating passage formed inside a solenoid coil and induction heating is performed on the whole, and a power is supplied to the solenoid coil. A high-frequency power supply device with a capacitor etc. is attached to the lifting frame, and this lifting frame is supported inside the portal frame so as to be able to move up and down, and guide rollers protruding on both left and right sides of the lifting frame are installed inside the portal frame. An induction heating apparatus characterized in that a solenoid coil and a high-frequency power supply are supported so as to be able to move up and down by being supported by left and right guide rails attached vertically. 2. The induction heating device according to claim 1, wherein the lifting frame is connected to a lower end of a jack, a cylinder, or a ball screw mounted downward from an upper portion of the portal frame. . 3. The induction heating apparatus according to claim 1, wherein two solenoid coils are mounted on the elevating frame at right angles to a path line on which the plate-shaped material to be moved travels.