KR20180128254A - Apparatus for transferring conductive meterials - Google Patents

Abstract

According to one embodiment of the present invention, an apparatus for transferring a conductive material may convert an electric current supply method of an electrode from a direct current to an alternating current and generating an induction current by an alternating current in a conductive flow path by using an electromagnet instead of a permanent magnet and melt a liquid metal conveyed along a conductive flow path by allowing a conductive flow path to generate heat by an induction current without using a separate heating device.

Description

[0001] APPARATUS FOR TRANSFERRING CONDUCTIVE METERIALS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a conductive material transferring apparatus, and more particularly, to a conductive material transferring apparatus for transferring an electrically conductive material using a Lorentz force generated by a current and a magnetic field.

As is known, there is an electroconductive material transfer device for transferring electrically conductive materials, and there is an electronic pump for transferring a conductive material through a flow path. Such an electromagnetic pump is a device for transferring a conductive fluid to a Lorentz force generated by a magnetic field applied in a direction perpendicular to a current while flowing a large current to a conductive material in the flow path.

1 is a perspective view showing a configuration of an electronic pump according to the prior art.

1, a conventional electromagnetic pump 100 includes a rectangular channel 102, a permanent magnet 104 for applying a magnetic field to a conductive material in the channel 102, a conductive material 104 in a direction perpendicular to the direction of the magnetic flux generated by the magnetic field, And an electrode 108 for flowing current to the material.

The driving (pumping) pressure P of the conventional electronic pump according to the related art can be expressed by the following Equation 1 when the back electromotive force and the hydrodynamic loss are excluded.

Here, B is the intensity of the magnetic field, I is the intensity of the current, and H is the thickness in the magnetic field direction of the flow path.

The driving pressure P of the electromagnetic pump 100 is proportional to the intensity B of the magnetic field by the permanent magnet 104 and the intensity I of the current by the electrode 108, And is inversely proportional to the thickness H of the flow path 102 in the magnetic field direction.

Of these, the magnetic field intensity B shows a limit of about 1 tesla (T) in height by using the permanent magnet 104, and the minimum thickness H in the magnetic field direction of the flow channel 102 is 1 mm (mm).

Therefore, in order to obtain a high driving pressure P of the electromagnetic pump 100, a high current of several thousands to several ten thousand amperes (A) must be flowed through the electrode 108. [

However, since such a high current requires a bulky and costly power supply, there is a problem that the cost of a conductive material transfer system including an electric pump and a power supply is high and it is difficult to miniaturize.

Further, since the resistance of the liquid metal and the flow path through which the current flows is low, the voltage applied to the liquid metal and the flow path is lowered even when a high current of several thousands to tens of thousands of amperes is flowed, In order to transfer the liquid metal, there is a problem that an additional heating device is installed around the flow path to maintain a temperature higher than the room temperature and higher than the melting point of the liquid metal.

In addition, if such a heating device is included, if there is a problem during driving of the electronic pump, there is a problem that the maintenance of the electronic pump is troublesome, such as disassembling the electronic pump and repairing the heating device.

(Patent Literature)

Korean Patent Publication No. 10-2006-74412 (published on July 03, 2006)

According to the embodiment of the present invention, the current supply method of the electrode is changed from the direct current to the alternating current, the induction current is generated by the alternating current in the conductive flow path by using the electromagnet instead of the permanent magnet, and the conductive flow path is heated by the induction current So that the liquid metal transferred along the conductive flow path can be melted without a separate heating device.

The problems to be solved by the present invention are not limited to those mentioned above, and another problem to be solved can be clearly understood by those skilled in the art from the following description.

The present invention provides a conductive material transferring apparatus comprising a flow path portion including a conductive flow path wound along a spiral path and an electrode portion for applying a first alternating current to the flow path portion in a direction parallel to the central axis of the spiral path, And a magnet for generating a magnetic field in a radial direction of the helical path when the second alternating current is applied.

The channel portion generates heat corresponding to a magnitude of an induced current induced in the conductive channel and the liquid metal in the conductive channel by the first alternating current and the second alternating current.

The induction current is generated in the conductive channel and the liquid metal according to the Faraday electromagnetic induction law when the first alternating current and the second alternating current are applied, and the resistance of the conductive channel and the liquid metal And heat is generated by the induction current.

The first alternating current and the second alternating current are characterized in that the heat is a pre-calculated positive current which causes the temperature to be within a range capable of melting the metal.

Further, the second alternating current has the same phase as the first alternating current.

Further, the magnetic field portion is disposed in the inner space of the flow path portion.

The magnetic field unit may further include a cylindrical first ferromagnetic body located inside the electromagnet and filled with an inner space, and a second ferromagnetic body disposed in an outer space of the channel portion and having the electromagnet disposed therein .

The electrode portion may include a first electrode of a first polarity disposed on one side of the outermost winding of the flow path and a second electrode of a second polarity different from the first polarity disposed on the other side of the outermost winding of the flow path, And a second electrode of polarity.

According to the present invention, the current supply method of the electrode is changed from direct current to alternating current, an induction current is generated by the alternating current in the conductive flow path by using the electromagnet instead of the permanent magnet, and the conductive flow path is heated by the induction current, There is an advantage that the liquid metal to be conveyed along the heating plate can be melted without a separate heating device.

In addition, since the liquid metal transferred along the conductive flow path can be melted without using a separate heating device, there is an advantage that the maintenance can be simplified compared with the conventional electronic pump requiring a further heating device.

1 is a perspective view showing a configuration of an electronic pump according to the prior art.
2 is a partially exploded perspective view of a conductive material transfer apparatus according to an embodiment of the present invention.
FIG. 3 is a perspective view showing the electromagnet structure of the magnetic circuit according to the embodiment of the present invention. FIG.
4 is a cross-sectional view of a portion of a conductive material transfer apparatus according to an embodiment of the present invention.
FIG. 5 is a perspective view showing a coupling state of a first electrode and a second electrode in a flow path of a conductive material transfer apparatus according to an embodiment of the present invention. FIG.
6 is a perspective view of a first electrode and a second electrode of a conductive material transfer apparatus according to an embodiment of the present invention.
7 is a plan view and a side view of a first electrode and a second electrode of a conductive material transfer apparatus according to an embodiment of the present invention.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

FIG. 2 is a partially exploded perspective view of a conductive material transferring apparatus according to an embodiment of the present invention. FIG. 3 is a detailed circuit diagram of a magnet body according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view of a conductive material transferring apparatus according to an embodiment of the present invention when the apparatus is cut along the line x-x 'in FIG. 2, and FIG. 5 is a cross-sectional view of a conductive material transferring apparatus according to an embodiment of the present invention 6 is a perspective view of a first electrode and a second electrode of a conductive material transfer apparatus according to an embodiment of the present invention, and FIG. 7 is a perspective view of the first electrode and the second electrode, 1 is a plan view and a side view of a first electrode and a second electrode of a conductive material transfer apparatus according to an embodiment of the present invention;

2 to 7, a conductive material transfer apparatus 200 according to an embodiment of the present invention includes a flow path portion 210, an electrode portion 220, and a magnetic storage portion 230.

The flow path portion 210 includes a conductive flow path 211 wound with N turns along the spiral path. The flow path 211 provides a path through which the conductive material is transported. Here, the flow path 211 is made of a material having conductivity such as a stainless steel tube or the like.

The electrode unit 220 has the first electrode 221 of the first polarity disposed on one side of the outermost winding of the flow path 211 and the other end of the first electrode 221 on the other side of the flow path 211, The second electrode 222 of the second polarity is disposed. An alternating current can be applied to the flow path portion 210 in the direction of the center axis of the spiral path through the electrode portion 220. That is, current can be applied to the flow path portion 210 in a direction orthogonal to the radial direction of the helical path and in parallel with the central axis of the helical path. The first electrode 221 and the second electrode 222 may be formed of copper (Cu) or the like.

That is, according to an embodiment of the present invention, the electrode unit 220 receives an alternating current in place of the direct current and applies an alternating current in the direction of the central axis of the helical path to induce an induced current in the conductive path, Heat is generated in the flow path. So that the liquid metal carrying the conductive flow path can be melted by the heat generated by the induction current as described above.

Magnetic field 230 can apply a magnetic field to the flow path portion 210 in the radial direction of the helical path. The magnetic field 230 includes a cylindrical electromagnet 231 having an inner space empty and both circular openings. The electromagnet 231 includes a cylindrical iron core 300 and a coil (302).

On the other hand, in the structure of the conventional electronic pump, the resistance of the liquid metal and the flow path is low, so that even when a high current of several thousands to several tens of thousands of amperes is supplied, the voltage applied to the liquid metal and the flow path becomes low, In order to transfer the liquid metal through the flow path, an additional heating device is installed around the flow path to maintain the temperature above the melting point of the liquid metal higher than the room temperature, same.

Therefore, in the embodiment of the present invention, the current supply method of the electrode unit 220 is changed from DC to AC, and the magnetic field 230 is also used for the induction current And the conductive flow path is heated by the induction current generated in this manner, so that the liquid metal transferred along the conductive flow path can be melted without a separate heating device. In addition, since the liquid metal transferred along the conductive flow path can be melted through the heat generated by the induction current, an additional heating device is not required, and the maintenance of the electronic pump becomes simpler.

That is, in the embodiment of the present invention, single-phase or multi-phase alternating current is supplied to the electrode unit 220 to apply an alternating current in the direction of the central axis of the helical path of the flow path, And the magnetic field is applied in the radial direction of the spiral path so that the Lorentz force is generated in the circumferential direction of the spiral path so that the liquid metal is transferred along the flow path.

At this time, induction currents are induced in the induction and liquid metal by the alternating current applied from the electrode unit 220 and the alternating current applied from the electromagnet 231 according to the Faraday electromagnetic induction law, The resistors interact with each other to generate heat in the flow path. Accordingly, heat is generated in the flow path by converting the current supplied to the electrode unit 220 and the electromagnet 231 from DC to AC so that the heat that can melt the liquid metal transferred along the flow path without additional heating device Can be obtained. At this time, since the heat generated in the flow path can be increased corresponding to the amount of the alternating current supplied to the electrode unit 220, the amount of the alternating current supplied to the electrode unit 220 can be adjusted, It is possible to naturally molten the liquid metal conveyed along the flow path by making it a temperature capable of melting.

In the case where the electrode unit 220 and the electromagnet 231 are constituted as described above, in the case of the prior art, only a temperature increase of several tens degrees is observed when a current of 1000 amperes is passed. In an embodiment of the present invention, The temperature corresponding to the melting point of the liquid metal can be easily obtained.

A magnetic field is applied to the flow path 211 of the conductive material transfer device 200 in the radial direction of the helical path by the electromagnet 231 and the magnetic field is applied to the flow path 211 in the direction of the central axis of the helical path through the electrode part 220 When the alternating current flows, the conductive material in the flow path 211 is transported in the circumferential direction of the helical path in accordance with the Lorentz force f, which can be expressed by the following equation (2).

Here, f is the force density per unit of the conductive material in the flow path 211, J is the current density, and B is the intensity of the magnetic field.

The driving (pumping) pressure P of the conductive material transfer apparatus 200 according to an embodiment of the present invention can be expressed by Equation (3) below when the back electromotive force and the hydrodynamic loss are excluded.

Where I is the intensity of the current applied to the conductive material on the electrode portion 220 and D is the intensity of the current applied to the conductive material on the flow path 211. Herein, n is the winding of the flow path 211, B is the strength of the magnetic field generated by the electromagnet 231, In the magnetic field direction.

The driving pressure P of the conductive material transferring apparatus 200 is determined by the intensity B of the magnetic field generated by the winding n of the flow path 211 and the magnet body 231, And is inversely proportional to the magnetic field direction inner diameter D of the flow path 211. [

The first electrode 221 and the second electrode 222 constituting the electrode unit 220 may include a frame 220a and a plurality of leads 220b. Here, the frame 220a in the form of a ring can be brought into contact with the outermost winding of the flow path 211, and a predetermined length of M (m) in the frame 220a in the direction of the central axis of the helical path through which the flow path 211 is wound (M is a natural number of 2 or more) leads 220b may be extended, and the M leads 220b may have an angular interval of 360 degrees / M. Here, if the number of the leads 220b is three, the first lead 220b has an angular interval of 120 degrees, and the center of the first lead 220b and one end of the frame 220a can have an angular interval of 30 degrees. For example, the frame 220a may be formed in the form of a landolt ring, and the end of the flow path 211 may be exposed to the outside through the open area by the Landolt ring and the hole 233e.

Since the first electrode 221 and the second electrode 222 include M leads 220b, if the leads 220b include more leads than the lead 220b, The applied current density becomes uniform and the loss pressure due to the counter electromotive force of the electromagnetic pump can be reduced.

In addition, the flow path portion 210 may include a conductive brazing joint 212 between two windings of the flow path 211. This can be produced by brazing the two windings of the flow path 211 using a material having conductivity such as silver or the like. In the case where the circular flow path 211 is used and the conductive brazing joint body 212 is not provided, the contact portion between the two windings of the flow path 211 is small and the contact resistance is extremely large, The conductive brazing material 212 serves to reduce the contact resistance between the two windings of the flow path 211, although the current applied to the conductive material is lowered. In FIG. 4, the distances between adjacent flow paths 211 are exaggerated to facilitate understanding, but adjacent flow paths 211 may be in contact with each other.

The magnetic storage unit 230 may further include a first ferromagnetic body 232 and a second ferromagnetic body 233. The first ferromagnetic body 232 may be a cylindrical shape filled with an inner space and a circumferential surface may be provided in a spiral path in which the flow path 211 is wound. The second ferromagnetic body 233 may have a cylindrical shape in which the inner space is empty and both circular faces are closed, the electromagnet 231 may be disposed in an empty inner space, and the electromagnet 231 may be disposed on either of the two circular faces, One end of the flow path 211 and the first electrode 221 may be exposed and the other end of the flow path 211 and the second electrode 222 may be exposed through the other of the two closed circular surfaces.

The second ferromagnetic body 233 of the conductive material transfer apparatus 200 according to an embodiment of the present invention has a role as a housing for protecting the electromagnet 231 and the like, And the second ferromagnetic body 233 may be composed of an upper end portion 233a, a middle portion 233b and a lower end portion 233c for ease of disassembly. M slits 233d may be formed on the circular surfaces of the upper end 233a and the lower end 233c to expose M leads 220b included in the first electrode 221 and the second electrode 222, One hole 233e through which the end of the flow path 211 is exposed can be formed. The first ferromagnetic body 232 and the second ferromagnetic body 233 may be made of steel having a high magnetic permeability.

The first ferromagnetic body 232 and the second ferromagnetic body 233 constituting the magnetic storage unit 230 induce a magnetic field to increase the intensity of the magnetic field generated by the electromagnet 231. That is, for example, if the electromagnet 231 is surrounded by the second ferromagnetic body 233, the intensity of the magnetic field of the electromagnet 231 is increased by 3 to 10 times. The magnitude B of the magnetic field of the electromagnet 231 is controlled by the first and second ferromagnetic bodies 232 and 233 because the force received by the conductive material in the flow path 211 is proportional to the intensity of the magnetic field, The force received by the conductive material in the flow path 211 proportionally increases.

The conductive material transfer device 200 according to an embodiment of the present invention includes an insulating material 240 between the first ferromagnetic material 232 and the flow path 211 and between the flow path 211 and the magnet body 231, As shown in FIG. The insulating material 240 may be made of Teflon, ceramics, glass, wood or the like so that no current is applied to the first and second ferromagnetic bodies 232 and 233 through the electrode unit 220. When a current is applied to the first ferromagnetic body 232 and the second ferromagnetic body 233, the current applied to the conductive material in the flow path 211 is reduced by the current, so that the Lorentz force for transferring the conductive material is lowered. ) Does not lower the Lorentz force because it interrupts the current flow. Here, the frame 220a of the first electrode 221, the frame 220a of the second electrode 222, and the slit 233d of the second ferromagnetic body 233 are covered with the insulating material 240 to further reliably block the current flow .

As described above, according to the embodiment of the present invention, the current supply method of the electrode is changed from direct current to alternating current, and an electromagnet is used in place of the permanent magnet so that an induced current is generated by the alternating current in the conductive flow path, The conductive channel is heated so that the liquid metal transported along the conductive channel can be melted without a separate heating device.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

200: Conductive material transfer device 210:
211: Flow path 212: Conductive brazing joint
220: electrode part 221: first electrode
222: second electrode 220a: frame
220b: lead 230: magnetic book
231: electromagnet 232: first ferromagnetic body
233: second ferromagnetic body 233a: upper end of the second ferromagnetic body
233b: central part of the second ferromagnetic body 233c: lower part of the second ferromagnetic body
233d: slit of the second ferromagnetic body 233e: hole of the second ferromagnetic body
235: ferromagnetic material 240: insulating material

Claims (8)

A flow path portion including a conductive flow path wound along a spiral path,
An electrode portion for applying a first alternating current to the flow path portion in a direction parallel to the center axis of the helical path,
And a magnetic field generator including an electromagnet generating a magnetic field in a radial direction of the helical path when a second alternating current is applied,
And a conductive material transferring device. The method according to claim 1,
The flow-
Wherein the first AC current and the second AC current generate heat corresponding to a magnitude of an inductive current induced in the conductive channel and liquid metal in the conductive channel. 3. The method of claim 2,
The induction current,
Wherein when the first alternating current and the second alternating current are applied, they are generated in the conductive channel and the liquid metal according to the Faraday electromagnetic induction law, and the resistance of the conductive channel and the liquid metal, Conducting material transfer device. 3. The method of claim 2,
Wherein the first AC current and the second AC current are supplied to the first,
Wherein the heat is a pre-calculated amount of current that causes the temperature to be in a range that allows the metal to melt. The method according to claim 1,
Wherein the second alternating current
Wherein the first AC current has the same phase as the first AC current. The method according to claim 1,
The magnetic-
Wherein the conductive material is disposed in the inner space of the channel portion. The method according to claim 6,
The magnetic-
A cylindrical first ferromagnetic body located inside the electromagnet and filled with an inner space,
A second ferromagnetic body disposed in an outer space of the channel portion and having the electromagnet disposed therein,
Further comprising a conductive material transferring device. The method according to claim 1,
The electrode unit includes:
A first electrode of a first polarity disposed on one side of the outermost winding of the flow path and a second electrode of a second polarity different from the first polarity disposed on the other side of the outermost winding of the flow path, Conductive material conveying device.

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