JPS6215996Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a channel induction furnace.

Generally, in a channel induction furnace, an inductor is provided at the bottom of the furnace body in order to heat and keep the molten metal in the furnace warm. The inductor in a conventional channel induction furnace is provided in a refractory 1a forming the bottom of a furnace body 1, as shown in FIG. The side grooves 2 of the groove-shaped induction furnace are formed at the bottom of the sump 1b so that the molten metal flows in from one opening and flows out from the other opening, forming a reciprocating flow path for the molten metal. This side gutter 2 is formed so as to pass through the refractory 1a and go around in a direction perpendicular to a coil 4 wound around a horizontally supported iron core 3, and the molten metal in this side gutter 2 is Induction heating is performed by an inductor 5 composed of a coil 4 and a coil 4.

Conventionally, the refractory part 1 forming the bottom of the furnace body 1
A cylindrical coil duct 6 having a cooling water passage is joined to the inner circumferential surface of the cylindrical accommodating portion 1c provided in a and fixed in the horizontal direction. Thereafter, the inductor 5 is inserted into the coil duct 6, and the inductor 5 is supported while passing through the side groove 2 and the coil duct 6. However, in the above configuration, in order to insert the inductor 5 into the cylindrical coil duct 6 fixed to the inner circumferential surface of the housing portion 1c, the outer circumferential surface of the coil 4 and the inner circumferential surface of the coil duct 6 are connected. Therefore, the distance between the gutter in the refractory that forms the furnace body and the coil increases, the power factor of induction heating decreases, and the distance required for constructing the induction furnace increases. This method has problems such as requiring a large amount of time and tools.

The present invention was developed in view of the above problems, and its purpose is to form an induction coil so that the outer circumferential surface of the induction coil is in contact with the inner circumferential surface of the coil duct via an insulator, and to connect the gutter and the inductor. It is an object of the present invention to provide a channel induction furnace capable of shortening the distance between the two sides, increasing the power factor, and simplifying the furnace construction work.

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, a gutter 2 in the refractory that forms the furnace body 1 goes around an inductor 5 made up of an iron core 3 and a coil 4 at right angles, and the molten metal in the gutter 2 flows into the inductor 5. The configuration for induction heating is therefore the same as the conventional example shown in FIG.

When forming the coil 4 in the furnace body 1 of the induction furnace,
An insulating material 7 is wrapped around the outer circumferential surface of the coil 4 to a certain thickness, and the outer circumferential surface of the insulating material 7 and the inner circumferential surface of the cylindrical coil duct 6 are joined, so that the coil duct 6 is connected to the coil 4. be integrated. The coil 4, insulating material 7, and coil duct 6 formed as described above are attached to the refractory part 1 of the furnace body 1 in which the side groove 2 is formed.
It is fitted into the accommodating portion 1c of a and fixed to the furnace body 1. After that, the iron core 3 is inserted into the coil 4, and the iron core 3 is supported by a member (not shown) in a state where the iron core 3 passes through the coil 4.

When the coil 4 is formed in the furnace body 1 as described above,
As shown in FIG. 3, the coil 4 is integrated with a coil duct 6 via an insulating material 7, and the integrated coil 4, insulating material 7, and coil duct 6 are connected to the refractory portion 1a of the furnace body 1. Since the outer circumferential surface of the coil duct 6 is fitted and joined to the refractory of the furnace body 1 as described above, there is no gap between the coil 4 and the coil duct 6 as in the conventional case, and the coil 4 and The distance to the side gutter 2 is shorter than before. Therefore, when the molten metal in the side gutter 2 is heated by induction, the power factor is improved.

As explained above, in the present invention, the induction coil and the cooling coil duct are integrally joined, so that there is no gap between them, and the power factor in the channel induction furnace can be improved. can. Further, since the induction coil and the cooling coil duct are integrated in advance and attached to the refractory of the furnace body, the furnace construction work can be simplified.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a conventional example of a groove-shaped induction furnace, FIG. 2 is a partial sectional view showing an embodiment of the groove-shaped induction furnace according to the present invention, and FIG. 3 is a partial side view of FIG. 2. be. 1a...Refractory, 2...Gutter, 3...Iron core, 4
...Coil, 5...Inductor, 6...Coil duct.

Claims (1)

[Scope of utility model registration request] In a channel induction furnace, an induction coil and a cooling coil duct formed around the outer periphery of the induction coil are installed in a refractory material, and the molten metal is passed through a reciprocating passage surrounding the cooling coil duct. A channel induction furnace characterized in that a cooling coil duct is integrated in advance, and the outer circumferential surface of the induction coil is in contact with the inner circumferential surface of the cooling coil duct.