JPH01222648A - Electromagnetic pump - Google Patents

Abstract

PURPOSE:To carry molten at high speed, by jointing between the lead-in section and the feeding section of molten metal in loop such that the long side of a flat refractory molten guide tube will be horizontal and producing a circular moving magnetic field around the long side. CONSTITUTION:A refractory molten guide pipe 11 having a molten lead-in section 11a and a molten feeding section 11b is formed in loop. The guide pipe 11 has rectangular elongated cross-section with the long side thereof being set horizontal, and annular upper and lower inductors 12, 13 are arranged on the upper and lower faces. The upper and lower inductors 12, 13 are arranged in circular with magnetic poles 14a1-14an wound with coils 15a1-15an then AC three-phase voltage is applied through terminals R, S, T to produce circular endless moving field. Consequently, molten can be carried efficiently at high speed according to the field produced by eddy current produced in the molten and the circular moving field.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for carrying out operations such as transferring and cutting out conductive molten metal (molten metal) such as aluminum at high speed.

This relates to electromagnetic pumps.

[Prior Art] Conventional electromagnetic pumps include planar electromagnetic pumps and cylindrical electromagnetic pumps.

As shown in Fig. 6, the planar electromagnetic pump has magnetic circuits 2 and 3 placed above and below a flat molten metal conduit 1 for flowing molten metal, and the magnetic circuit 3 is provided with a winding 4. hand,
These magnetic circuits 2, 3 and winding 4 form an inductor,
The upper part (magnetic circuit 2) and lower part (magnetic circuit 31 winding 4) of this inductor are used as a pair to penetrate a moving magnetic field into the molten metal, and obtain a thrust based on the interaction with the eddy current generated along with this. This is how it was done.

In this case, the current induced in the molten metal is a-b-c in the same figure.
The part that creates a loop of -da and generates thrust in the longitudinal direction of the flat molten metal conduit 1 is the current direction between a-b and c-a, and the thrust is generated between other b-c and da. Since the directions are different, no thrust is generated in the longitudinal direction of the flat molten metal conduit 1. Therefore.

If this pump is used vertically, the molten metal will fall between b-c and d-a. In order to prevent the molten metal from falling, it is necessary to increase the thrust generated between a-b and ca.

On the other hand, a single cylindrical electromagnetic pump, as shown in FIG. A winding 7 is applied to form an inductor, and a moving magnetic field is passed through the molten metal by pairing the inductor portions facing each other with a cylindrical molten metal conduit 5 in between. 8 is a cylinder. External refractory pipes, 9 and 10, located outside the mold melt conduit 5
are internal refractory tubes and cores located inside the cylindrical melt conduit 5, respectively. In such a cylindrical electromagnetic pump, even if the cylindrical molten metal conduit 5 is completely filled with molten metal, the induced current generated within the molten metal decreases from the periphery to the center of the conduit. It becomes zero. Therefore, the thrust generated in one peripheral portion is large, but no thrust is generated in the central portion. For this reason, a refractory tube 9, a core 10 of a refractory material, etc. are inserted into the center of the cylindrical molten metal conduit 5, so that the cylindrical molten metal conduit 5 is actually an annular conduit.

[Problem to be solved by the invention] In the case of conventional planar electromagnetic pumps.

The part that can mainly generate thrust is the center part, and both ends are return parts, so the direction of the generated thrust is different.

This produces an ineffective thrust, the so-called side-end effect.

On the other hand, in the case of a 9-cylindrical electromagnetic pump, the induced current is ring-shaped, so the side edge effect does not occur.

At both ends of the fluid (introduction side, supply side), the coil structure = 3 = Because it is impossible to create a perfect moving magnetic field.

Thrust is reduced and a so-called longitudinal end effect occurs.

That is, the conventional pumps have the disadvantage that the effective thrust is reduced in both planar and cylindrical electromagnetic pumps.
There were problems with work efficiency.

Each invention of the present application aims to solve the problems of the conventional ones.

[Means to solve the problem] The first invention (specific invention) of the present application is, for example.

Two circular inductors are placed facing each other.

A molten metal conduit is arranged like a spring so as to be sandwiched between these inductors, and is configured to apply a circular moving magnetic field to the molten metal.

Moreover, the second invention related to this first invention is as follows.

For example, a molten metal conduit is arranged concentrically between two cylindrical inductors that are arranged concentrically with each other, and a circular moving magnetic field is applied to the molten metal. ing.

[Example] An example of each of the first and second inventions of the present application shown in FIGS. 1 to 5 will be described below.

(Embodiment of the first invention) In FIGS. 1 to 3, the upper unit is a molten metal conduit made of a refractory material and equipped with a molten metal introduction part 11a and a molten metal supply part 11b, and is similar to a conventional planar electromagnetic pump. , has a flat cross section, as shown in Figure 1.

It is formed into a spring shape. An upper inductor 1 formed in an annular shape on the upper and lower surfaces of this molten metal conduit upper unit, respectively.
2 and the subcontractor conductor 13 are installed facing each other so as to sandwich the molten metal conduit 1↓. 14a1-14a,.

are magnetic poles, and 15a+ to 15a are coils wound around each of the magnetic poles.

Note that the shapes of the molten metal conduit 1 unit and each inductor 12, 13 are not limited to the spring shape and annular shape shown in the embodiment. That is, the molten metal introduction part and the supply part are connected by a molten metal guide path such as a molten metal conduit that forms a loop in the direction in which the long sides of the flat refractory tubes are flat, and the opposing planes of the molten metal guide path are connected. The inductor may be arranged in the molten metal guide path so as to generate an endless circular moving magnetic field facing at least one side.

Further, the magnetic poles of each phase of each inductor 12, 13 are arranged such that N and S form a pair, and are connected to each other so as to generate a moving magnetic field.

(Embodiment of the second invention) In FIGS. 4 and 5, 16 is a cylindrical foreign language guide provided with a plurality of magnetic poles on the inner circumference side, and 17 is also a cylindrical inner guide, its magnetic poles. is placed opposite the magnetic pole of the foreign language guide 16. Note that one illustration is omitted.

Foreign language guide 16. A coil is wound around each magnetic pole of the inner inductor 17, and the magnetic poles of each phase of each inductor 16 and 17 are N,
S are arranged as a pair, and the wires are connected so as to generate a moving magnetic field.

Reference numeral 18 denotes a molten metal conduit having a molten metal introduction part 18a and a molten metal supply part 18b, and as shown in the figure, this is of a flat shape, with the longitudinal direction of the cross section being the inductor core lamination direction, and at least one It is formed in the shape of a spring wound more than once and is placed concentrically between the foreign language guide 16 and the inner guide 17.

19a1 to 19a, , are the magnetic poles of the foreign language guide 16, 19b1
~19bn is a coil wound around these magnetic poles.

20a1 to 20an are magnetic poles of the inner inductor 17, 20b
.

~20b, is a coil wound around these magnetic poles.

Foreign language guide 16. The magnetic poles of each phase of the inner inductor 17 are N and S.
The wires are connected in such a way that they each generate a moving magnetic field.

In addition, foreign language guide 16. Inner inductor 17 and molten metal conduit 18
The shapes of are not limited to those in the examples. That is, the molten metal introduction part and the molten metal supply part are connected by a molten metal guide path that forms a loop in the direction of the short side or plane of the flat refractory pipe, and the opposite inner and outer periphery of the molten metal guide path is connected. It is preferable to arrange the inductors so as to generate an endless circular moving magnetic field facing at least one side.

[Effect] (Action of the first invention) What is the principle of thrust generation in both the first invention and the second invention?

Since this is the same as in the case of the planar electromagnetic pump described above, the explanation of this point will be omitted.

By the way, in the case of the first invention, since the inductors 11 and 12 are configured to form a circular loop or the like,
The moving magnetic field becomes an endless circular moving magnetic field, and there is no thrust attenuation due to the longitudinal end effect.

(Operation of the second invention) In the case of the second invention, since the inductors 16 and 1.7 are configured to form a cylindrical loop, the moving magnetic field becomes an endless circular moving magnetic field. , the thrust attenuation due to the longitudinal end effect disappears.

[Effects of the Invention] As described above, in the present invention, the two inductors are formed, for example, in an annular shape in the first invention, and in a cylindrical shape in the second invention, and the molten metal conduit is formed with a spring. It is formed into a shape and placed between each inductor.

This is because it is configured to apply a circular moving magnetic field to a moving object such as molten metal stored in a molten metal conduit.

It has the following excellent effects.

- Since the vertical end effect is eliminated, the thrust force can be increased accordingly, and the molten metal transfer and cutting operations can be performed at high speed (first and second inventions).

(2) When the inductor is formed into a ring shape, the extension of the inductor can be increased, resulting in a compact structure (first invention).

■The overall configuration becomes simple (first and second inventions).

■Because there is an inner inductor, it gives a strong magnetic flux to the molten metal conduit,
Therefore, it is possible to obtain two more powerful thrusts than in the case of the first invention and to perform high-speed work (second invention).

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the first invention of the present application, in which Figure 1 is a perspective view, Figure 2 is a plan view, and Figure 3 is a perspective view.
The figure is a developed view of the magnetic pole part. 4 and 5 show an embodiment of the second invention of the present application, in which FIG. 4 is a perspective view and FIG. 5 is a plan view. Further, FIGS. 6 and 7 are perspective views showing conventional examples, respectively. 11: Molten metal conduit 12: 1 inductor 13 Subcontractor conductors 14a1 to 14a, magnetic poles 15a1 to 15a A: Coil 16: Outer inductor 17: Inner inductor 18: Molten metal conduit 19a1 to 19a, : Magnetic pole 2oal to 20ah: Magnetic pole 19b, ~19b, : Coil 20b1 ~ 20b, : Coil Applicant Shinko Electric Co., Ltd. Agent Patent attorney Haruya Saito and two others Figure 1 Figure 3 Head Long Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. The introduction part and the supply part of molten metal (hereinafter referred to as molten metal) are connected by a molten metal guide path forming a loop in the direction in which the long side of the flat refractory tube becomes flat, and the above-mentioned An electromagnetic pump characterized in that an inductor is arranged in the molten metal guide path so as to generate a circular moving magnetic field facing at least one of the opposing planes of the molten metal guide path. 2. The electromagnetic pump according to claim 1, wherein two inductors each formed in an annular shape are used as the inductors, and these inductors are installed so as to face each other with the molten metal guide path in between. 3. The molten metal introduction part and the molten metal supply part are connected by a molten metal guide path that forms a loop in the direction in which the short side of the flat refractory pipe is flat, and the opposing inner and outer periphery of the molten metal guide path are What is claimed is: 1. An electromagnetic pump characterized in that an inductor is arranged so as to generate a circular moving magnetic field facing at least one side of the pump. 4. The electromagnetic pump according to claim 3, wherein two inductors each having a cylindrical shape are used as the inductors, and these inductors are installed so as to face each other with the molten metal guide path in between.