JPS638075Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an electromagnetic induction heater.

[Conventional technology]

Conventionally, in this type of induction heater, as shown in FIG. An iron core 4 is formed, an induction coil 6 is wound around the leg portion 2 of the iron core 4, and the tip end face 5 of the iron core 4 is used in contact with an object to be heated.

[Problem that the invention attempts to solve]

In the case of the above-mentioned conventional electromagnetic induction heater, since the iron core is an integral piece, there is no particular problem when heating a straight or flat object, but if the object to be heated is curved or bent. There is a problem that it cannot be used when it is hot, and if it is used forcibly, the iron core will not come into close contact with the surface of the heated object, resulting in a decrease in efficiency, and the leakage magnetic flux will increase, causing the temperature of the induction coil to rise rapidly. The drawback was that the temperature of the object to be heated did not rise, which eventually led to burnout of the induction coil.

[Means for solving problems]

The present invention aims to solve the problems of the prior art, and is characterized by comprising an iron core having a bendable hinge structure, and an induction coil wound around the iron core while avoiding the hinge structure. The purpose of this invention is to provide an electromagnetic induction heater.

[Effect]

According to the present invention, the iron core has a bendable hinge structure, and an induction coil is wound around the iron core avoiding the hinge structure to form an electromagnetic induction heater. By bending the iron core arbitrarily, the tip surface of the iron core can be easily brought into contact with a curved or bent object to be heated, thereby efficiently heating the object.

[Example of idea]

Embodiments of the present invention will be described with reference to the drawings. 1st
FIG. 2 is a side view and a plan view, respectively, of the electromagnetic induction heater 7 according to the present invention. The iron core is L
Laminated silicon steel plates in the shape of two layers each on the bottom and top.
Insert the bolt 8 into the hole drilled at the location, and then tighten the nut 9.
The two L-shaped laminated cores 10 are formed into two integral L-shaped cores 10 that are symmetrical to each other and are fastened together.
The upper ends of the two laminated cores 10 are fitted between every other silicon steel plate or silicon steel plates, and a common hole is bored in the hole, and a hinge is formed in the hole. The bolt 11 is inserted into the nut 1.
2, and are rotatably joined to each other to form a hinge structure 13. The laminated core 10 has a flat lower end surface 14, and when the lower end surface 14 is brought into contact with a flat plate, the two L-shaped laminated cores 10 form a letter shape, and the hinge structure portion 13 is It is located exactly in the center of the entire iron core. Induction coils 1 each using a commercial frequency are installed in the leg portions 15 of the iron core forming the character shape.
6 is wound to form an electromagnetic induction heater 7.

Next, a method of using the electromagnetic induction heater 7 according to the present invention will be explained. Figure 3 shows magnetic pipe 1.
The case where 7 is used as the object to be heated is shown. When heating the lower end surface 14 of the laminated core 10 in contact with the inner surface of the pipe 17, the legs 15 of the laminated core 10 are opened at the hinge structure 13, and the lower end surface 14 is brought into close contact with the inner surface of the pipe 17. As a result, there is almost no leakage magnetic flux, and the temperature of the induction coil 16 does not rise rapidly, and the object to be heated between the laminated cores 10 is efficiently heated. The leg portion 1 of the laminated iron core 10 is attached to the outer peripheral surface of the pipe 17.
When the lower end surface 14 of the leg 15 is brought into contact with the leg 15,
is properly closed, and the lower end surface 14 comes into close contact with the outer peripheral surface of the pipe 17 to efficiently raise the temperature of the object to be heated. Figure 4 also shows horizontal steel plates 1 intersecting each other at right angles.
8 and a vertical steel plate 19 by welding, an example is shown in which a welded portion is heated by the electromagnetic induction heater 7 according to the present invention. L-shaped laminated core 10
The legs 15 open 90 degrees from the position forming the character, and the lower end surface 14 of each laminated core 10 is connected to the vertical steel plate 1.
To efficiently heat a welded part of an object to be heated between a leg part 15 in close contact with a horizontal steel plate 18 and a horizontal steel plate 18.

According to the embodiment of the present invention, two symmetrical L-shaped laminated cores 10 are used, and the upper ends of the two laminated cores 10 are mutually connected to each other every other silicon steel plate or several silicon steel plates. A common hole is formed between the opposing silicon steel plates, and a hinge bolt 11 is inserted into the hole and fastened with a nut 12 to form a hinge structure 7 that can rotate freely with respect to each other. Since the structure is simple and the cost is low, and since the induction coil 16 using the commercial frequency is used, a special power source is not required and it is very convenient.

[Effect of idea]

According to the electromagnetic induction heater according to the present invention, the iron core has a bendable hinge structure and the induction coil is wound around the iron core, so even if the object to be heated has a curved surface or bends. Even if it is rough,
The iron core can be bent by the hinge structure and the lower end of the iron core can be brought into close contact with the object to be heated for efficient heating. is easy and has good thermal efficiency.
Furthermore, if the iron core has a hinge structure in the center, it will be easier to handle, the structure will be simpler, and the left and right sides will be symmetrical, thereby reducing manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an electromagnetic induction heater according to an embodiment of the present invention, Fig. 2 is a plan view thereof, and Figs. 3 and 4 show the state of use of the electromagnetic induction heater according to the present invention. Side view, FIG. 5 is a side view showing a conventional example. 7...Electromagnetic induction heater, 8...Volt, 9...
Nut, 10... Laminated core, 11... Hinge bolt, 12... Nut, 13... Hinge structure part, 14
... lower end surface, 15 ... leg, 16 ... induction coil, 17 ... pipe, 18 ... horizontal steel plate, 19 ...
...Vertical steel plate.

Claims (1)

[Claims for Utility Model Registration] (1) Electromagnetic induction heating characterized by comprising an iron core having a bendable hinge structure and an induction coil wound around the iron core avoiding the hinge structure. vessel. (2) The electromagnetic induction heater according to claim 1, wherein the iron core is shaped like a letter, and the induction coil is located at an end of the iron core. (3) The electromagnetic induction heater according to claim 1 or 2, wherein the hinge structure is located in the center of the iron core.