KR20110007411A - Magnetic lifter using a hybrid magnet - Google Patents

Abstract

PURPOSE: A magnetic lifter is provided to maximize magnetic force applied to a cylindrical material by longitudinally installing permanent magnet assemblies in the material. CONSTITUTION: A magnetic lifter comprises multiple permanent magnetic assemblies(100). The permanent magnetic assemblies are composed of supporting plates and a pair of magnetic poles(110). The magnetic poles comprise multiple metal thin plates installed in the inner side of the supporting plates. Permanent magnets are isnerted between the magnetic poles. The permanent magnetic assemblies are installed in a cylindrical material in a longitudinal direction.

Description

Magnetic lifter {magnetic lifter using a hybrid magnet}

The present invention relates to a magnetic lifter and, more particularly, to a magnetic lifter that maximizes the magnetic force on the adsorbate made of a cylindrical shape.

A magnetic lifter is a device used to transport or load a metal adsorbate, such as a steel coil, to desorb the adsorbed object using a magnet.

At this time, a transfer means such as a crane is further connected to the magnetic lifter, and the magnetic lifter is transferred to a predetermined place with the adsorbed substance attached thereto.

On the other hand, the magnet used in the magnetic lifter is used for electromagnets or electromagnets.

In this case, as shown in FIGS. 1A and 1B, the electromagnet is further provided with a coil 2 for changing the polarity of the fixed permanent magnet 1a and the variable permanent magnet 1b. It has all the functions.

Accordingly, the electromagnet has a feature that, when transferring the adsorbed object using the function of the electromagnet, the adsorbed material may be prevented from falling by the magnetic force of the permanent magnet even if the supply of power applied to the electromagnet is stopped.

Meanwhile, a general steel coil product produced while being rolled up in a steel mill is provided in various sizes and weights.

At this time, the steel coil has an outer diameter of 700 mm to 2600 mm, and its weight is produced in a considerable size of 10 to 40 tons.

Hereinafter, a conventional magnetic lifter will be described with reference to FIGS. 2A to 2C.

FIG. 2A is a view illustrating an example of a method in which a side at which a portion of the steel coil S wound is exposed is attached to the magnetic lifter.

As shown in Figure 2a, the side of the steel coil (S) is provided even if the size of the outer diameter is provided in a flat, the steel in a state that is disposed to face upward the flat side of the steel coil (S) upwards The side of the coil (S) is to be attached to the magnetic lifter.

At this time, the magnetic lifter is configured to include a magnet 10 and the connecting ring 20, the connecting ring 20 is fixed to the hook 30 of the crane.

In addition, looking at the operation process, by manipulating the transfer means including the hook 30 of the crane to arrange the magnetic leaf magnet 10 corresponding to the steel coil (S) side, by using the magnetic force of the magnet 10 The side of the steel coil (S) is adsorbed.

Thereafter, the magnetic lifter is transferred to a predetermined place through the operation of the conveying means.

However, in the magnetic lifter of the above-described method, even if the winding state of the steel coil S to be adsorbed is good, there are some protruding portions on the side of the steel coil S depending on the winding state.

Accordingly, there is a problem that the side of the steel coil (S) is damaged in the process of being in close contact with the magnet (10).

In order to solve such a problem, as shown in FIG. 2B, a magnetic lifter for adsorbing an outer circumferential surface of an adsorbate is provided.

The magnetic lifter includes a magnetic pole 40 that magnetically adsorbs the substance to be adsorbed.

At this time, a curvature 41 corresponding to the outer circumferential surface of the steel coil S is formed on the bottom of the magnetic pole 40.

Accordingly, as shown in FIG. 2B, the outer circumferential surface of the steel coil S is adsorbed by the curvature 41 of the magnetic pole 40 to prevent damage due to friction with the protruding portion of the steel coil S side. Prevented.

And, as another example of the prior art magnetic lifter, as shown in Figure 2c, the arm 50 is configured to walk the inner diameter of the wound steel coil (S).

At this time, the arm 50 is formed on both sides of the magnetic lifter, respectively, and comprises a locking portion 51 bent toward the inner diameter of the steel coil (S) from the bottom of the magnetic lifter.

By such a configuration, the engaging portion 51 of the arm 50 hangs up the inner circumferential surface of the steel coil S, and the steel coil S caught by the engaging portion 51 of the arm 50 is a magnetic lifter. It is transported and stacked in a desired place by a transport means installed at the top of the.

However, the above-described conventional magnetic lifters have the following problems.

In the magnetic lifter illustrated in FIG. 2B, when the curvature of the outer circumferential surface of the steel coil S and the curvature 41 of the magnetic pole 40 do not match, a problem occurs in that the adsorption force falls.

That is, when the curvature of the outer circumferential surface of the steel coil (S) is larger than the bottom curvature 41 of the magnetic pole 40, the gap, that is, the air gap between the center portion of the bottom surface of the magnetic pole 40 and the outer circumferential surface of the steel coil (S) (air gap) occurred, the adsorption force due to the magnetic force loss of the magnetic pole 40 was not maximized.

In addition, when the curvature of the outer circumferential surface of the steel coil (S) is smaller than the bottom curvature 41 of the magnetic pole 40, an air gap also occurs between both ends of the bottom surface of the magnetic pole 40 and the outer circumferential surface of the steel coil (S). The magnetic force loss of the magnetic pole 40 prevents the attraction force from being maximized.

In the magnetic lifter shown in FIG. 2C, since the load of the steel coil S is applied to the engaging portion 51 of the arm 50, damage is caused to crushed or contacted with each other by the weight of the steel coil. The problem that has arisen has arisen.

In addition, due to the configuration of the arm 50 installed in the magnetic lifter, a certain space must be secured so as not to interfere with the arm 50 between the plurality of steel coils S disposed in the loading space, and thus the steel coil There was a problem that the efficiency of the loading space of (S) is inferior.

The present invention has been made to solve the above problems, an object of the present invention is to provide a magnetic lifter that maximizes the magnetic force applied to the object to be adsorbed regardless of the outer diameter.

To this end, a pair of magnetic poles including a support plate and a plurality of metal thin plates installed inside the support plate are opposed to each other, and between the pair of magnetic poles in an electromagnet having an electromagnet interposed therebetween, The electromagnet assembly provides a magnetic lifter, characterized in that a plurality of installed in the longitudinal direction of the adsorbed material.

 At this time, the metal thin plate is made of a steel plate having a high permeability of 7000 or more permeability, the magnetic pole is composed of an upper magnetic pole and a lower magnetic pole installed on the lower of the upper magnetic pole, the metal thin plate installed on the upper magnetic pole is a magnetic pole The metal plate overlapping along the long side direction of, and the metal plate installed on the lower magnetic pole is preferably superimposed in a direction perpendicular to the metal plate installed on the upper magnetic pole.

In addition, the bottom surface of the magnetic pole is made to have a curvature along the long side direction, it is preferable that a plurality of pole shoes are pivotally coupled to the bottom of the magnetic pole rotatably along the curvature.

At this time, the curvature of the magnetic pole is formed on the bottom surface of the metal sheet overlapped with the lower magnetic pole, the curvature formed on the metal sheet is preferably different curvature for each section.

At this time, the upper magnetic pole and the lower magnetic pole is preferably detachably coupled to each other.

In addition, a pole shoe groove is formed on a bottom surface of the metal sheet overlapped with the lower magnetic pole, and the pole shoe is axially coupled to enter and exit the pole shoe groove.

In addition, the electromagnet includes a permanent magnet and a solenoid coil, it is preferable that the heat insulating material is further installed below the solenoid coil.

In addition, it is preferable that among the plurality of electromagnet assemblies, adjacent magnetic poles have the same polarity.

According to the magnetic lifter using the electromagnet according to the present invention has the following effects.

First, a plurality of electromagnets generating magnetic force are installed in the longitudinal direction with respect to a cylindrical adsorbate, thereby maximizing the magnetic force applied to the adsorbed object even if the curvature of the bottom surface of the electromagnet assembly and the curvature of the outer circumferential surface of the adsorbed material do not match each other. You can do it.

That is, when the electromagnet assembly is installed in the longitudinal direction with respect to the object to be adsorbed, even if an air gap occurs on both sides of the adsorbent because the curvature of the adsorbent does not match, the center of the adsorbent may have a plurality of the electromagnet assemblies in the longitudinal direction thereof. As the magnetic force is generated, the force for lifting the adsorbate can be maximized.

Accordingly, the loss of magnetic force can be minimized, and the magnetic force applied to the adsorbed substance can be maximized.

Second, since a plurality of pole shoes are further installed along the bottom curvature of the magnetic pole to compensate for the air gap generated by the difference in curvature of the support plate and the adsorbed material, there is an effect of maximizing the force of magnetic force on the adsorbed material.

Hereinafter, a magnetic lifter according to a preferred embodiment of the present invention will be described with reference to FIGS. 3 to 7C.

The magnetic lifter includes an electromagnet assembly 100 and a pole shoe 200.

The electromagnet assembly 100 generates a magnetic force so that the adsorbate can be adsorbed, and includes a magnetic pole 110 and a permanent magnet 120.

The magnetic poles 110 constitute the appearance of the electromagnet assembly 100 and are provided in pairs so as to face each other.

In this case, the magnetic pole 110 includes a support plate 111 and a plurality of metal thin plates 112 overlapped between the support plates 111.

The support plate 111 serves to support the overlapping metal thin plates 112 and is disposed along the long side direction of the magnetic pole 110.

The metal thin plate 112 receives magnetic force generated from the permanent magnet 120 to generate magnetic force through the support plate 111 and is supported by the support plate 111.

At this time, the material of the metal thin plate 112 is preferably made of a high permeability steel sheet with a permeability of 7000 or more.

At this time, the metal thin plate 112 is stacked in two stages on the upper and lower portions of the support plate 111.

At this time, the metal thin plate 112a disposed on the upper portion of the support plate 111 is disposed to overlap in the longitudinal direction of the magnetic pole 110 as shown in FIG. 5.

This is to increase the magnetic force transmission rate for the permanent magnet 120 corresponding to the upper portion of the support plate 111.

That is, since the permanent magnet 120 corresponds to the overlapping side surfaces of the metal thin plate 112a, the magnetic force may be smoothly transmitted through the overlapping gaps.

At this time, the metal thin plate 112b disposed below the support plate 111 may be disposed in a direction perpendicular to the metal thin plate 112a disposed above the support plate 111.

That is, the metal thin plates 112b disposed below are overlapped with respect to the short side direction of the support plate 111.

This is because the bottom of the magnetic pole 110 has a curvature, for this purpose, to facilitate the manufacture of the metal thin plate 112b constituting the bottom of the magnetic pole 110.

If the metal thin plate 112b disposed below is disposed in the same direction as the metal thin plate 112a disposed above, the metal thin plates 112b may have to be manufactured individually.

However, as shown in FIG. 5, since the metal thin plate 112b disposed below is a structure disposed in a direction perpendicular to the metal thin plate 112a disposed above, it may be understood that manufacturing may be easily performed. .

At this time, the bottom curvature of the magnetic pole 110 is formed along the outer circumferential surface direction of the object to be adsorbed.

This is to smoothly adsorb the cylindrical adsorbate.

At this time, the curvature of the bottom surface is preferably formed differently in each section.

That is, several different curvatures are formed to form the bottom of the magnetic pole 110.

This is for maximizing the efficiency of the adsorbed material because the outer peripheral surface of the adsorbed material is variously made.

Meanwhile, a plurality of pole shoe grooves 112c are formed along the curvature of the bottom of the magnetic pole 110, that is, the bottom of the metal thin plate 112b disposed below the support plate 111.

The pole shoe groove 112c is where the pole shoe 200 to be described later is disposed, and the pole shoe 200 is axially coupled on the pole shoe groove 112c.

That is, by this configuration, the pawl shoe 200 can freely enter and exit from the pawl shoe groove 112c toward the outside of the pawl shoe groove 112c.

On the other hand, the support plate 111 is preferably coupled to the upper and lower detachable.

That is, the metal thin plate 112a disposed above the support plate 111 and the metal thin plate 112b disposed below the support plate 111 are separated from each other.

Accordingly, the support plate 111 for supporting the metal thin plate 112 also preferably has a structure that is detachably coupled.

The reason for this is to increase the adsorption efficiency depending on the shape of the adsorbate.

That is, when the adsorbed material is cylindrical, the adsorbed material may be smoothly adsorbed using the bottom curvature of the metal thin plate 112b disposed below the support plate 111, and when the outer surface of the adsorbed material is flat, the support plate 111 may be By separating the metal foil 112b disposed below and the support plate 111 supporting the same, the flat bottom surface of the metal foil 112a disposed above the support plate 111 may be used to more easily adsorb the adsorbed material. It is.

The permanent magnet 120 serves as a permanent magnet and an electromagnet, and is interposed between the magnetic poles 110 provided as a pair.

At this time, the permanent magnet 120 corresponds to the metal thin plate 112a disposed on the upper side of the support plate 111, the stationary magnet 121, the variable magnet 122, and the solenoid coil surrounding the variable magnet 122 123.

At this time, the stationary magnet 121 is preferably a neodymium permanent magnet, the variable magnet 122 is preferably an alnico permanent magnet.

At this time, the solenoid coil 123 is preferably a heat insulating material (D) is installed in a portion exposed downward.

This is to prevent damage to the solenoid coil 123 when the working environment is made at a high temperature.

Next, the pole shoe 200 is to minimize the magnetic force loss in the air gap region caused by the difference in the curvature of the bottom surface of the electromagnet assembly 100 and the curvature of the cylindrical adsorbate, the pole formed on the bottom of the magnetic pole 110 It is installed in the shoe groove 112c.

The pole shoe 200 is axially coupled on the pole shoe groove 112c, and preferably has a fan shape.

However, the shape of the pole shoe 200 is not limited.

That is, the pole shoe 200 received the magnetic force from the upper permanent magnet 120 is to minimize the loss of magnetic force by compensating the air gap and the adsorbed matter.

Hereinafter, the coupling and the operation of the magnetic lifter having the above configuration will be described.

First, metal foils 112 overlapping in different directions are disposed between the support plates 111 constituting the magnetic pole 110.

Thereafter, the magnetic poles 110 are provided in pairs and installed to face each other.

At this time, among the magnetic pole 110, between the metal plate 112a disposed on the support plate 111, the stationary magnet (121: neodymium permanent magnet) and the variable magnet (122: Alnico permanent magnet) and the variable magnet 122 ) And the solenoid coil 123 wound is disposed and coupled.

At this time, the heat insulating material (D) is provided below the solenoid coil 123 as described above.

Accordingly, the electromagnet assembly 100 is completed, and the magnetic lifter for lifting the adsorbed material is provided by providing the plurality of the electromagnet assembly 100.

In the present specification, for convenience of description, the electromagnet assembly 100 constituting the magnetic lifter is provided as four examples.

At this time, the plurality of electromagnet assembly 100 is coupled in the longitudinal direction of the object to be adsorbed, as shown in Figure 3, 4, 7b, 7c.

In this way, the plurality of electromagnet assemblies 100 are installed in the longitudinal direction of the object to be adsorbed, thereby maximizing the application of the magnetic force generated from the plurality of electromagnet assemblies, that is, the magnetic lifter, even when the size of the air gap is large.

This is because, although the magnetic force on both sides of the magnetic lifter is lost due to the occurrence of the air gap, the magnetic force on the four electromagnet assemblies is acting at the center of the adsorbate.

If four of the electromagnet assemblies 100 are installed in the outer circumferential direction instead of the longitudinal direction of the adsorbed material, two of the two electromagnet assemblies 100 may be disposed at the center by losing the magnetic force by the air gap. Only the magnetic forces of the two electromagnet assemblies 100 are applied.

Accordingly, it is significant that the plurality of electromagnet assemblies 100 constituting the magnetic lifter are installed in the longitudinal direction of the adsorbed material, and have a very important technical feature.

On the other hand, in the process of installing the plurality of electromagnet assembly 100 in the longitudinal direction of the adsorbed material, it is preferable that the polarity generated in the magnetic poles adjacent to each other are the same.

If adjacent portions of the plurality of electromagnet assemblies 100 are installed to have different polarities, magnetic forces are generated between the electromagnet assemblies 100, and thus, the magnitude of the magnetic force on the absorbent material below is not maximized. .

That is, since adjacent portions of the electromagnet assembly 100 have the same polarity to each other, the magnetic force is generated only downward, the magnitude of the magnetic force can be maximized.

On the other hand, a plurality of pole shoes 200 installed along the bottom surface of the electromagnet assembly 100 is adsorbed on the outer peripheral surface of the adsorbed material while compensating for the air gap generated between the electromagnet assembly 100 and the adsorbed material.

Accordingly, the magnetic force loss on both sides of the magnetic lifter due to the air gap can be minimized.

As described so far, the magnetic lifter according to the present invention is further provided with a pole shoe 200 to compensate for the air gap generated between the electromagnet assembly 100 and the adsorbate, thereby minimizing the magnetic loss of the adsorbed material. There are technical features.

In addition, since a plurality of the electromagnet assemblies 100 are installed in the longitudinal direction of the adsorbed material, even if a large air gap occurs that the pole shoe 200 cannot compensate, the magnetic force on all of the electromagnet assemblies 100 is reduced. Since it acts on the adsorbate, there is a technical feature that can maximize the magnetic force on the adsorbate.

On the other hand, the reference numeral is a crane (C), and serves to transport the magnetic lifter to the object to be adsorbed, or to transfer the magnetic lifter to which the adsorbed material is adsorbed to a predetermined place.

1A and 1B are schematic diagrams schematically showing the principle of the electromagnet

2a to 2c is a side view showing a conventional magnetic lifter

Figure 3 is a perspective view showing a magnetic lifter and the adsorbed material according to a preferred embodiment of the present invention

Figure 4 is a bottom perspective view showing a magnetic lifter according to a preferred embodiment of the present invention

5 is a perspective view showing a magnetic pole assembly according to a preferred embodiment of the present invention

6A to 6C are a plan view, a front view, and a side view showing an electromagnet assembly of a magnetic lifter according to a preferred embodiment of the present invention.

7A to 7C are a front view, a side view, and a plan view showing a state in which a magnetic lifter adsorbs an adsorbate according to a preferred embodiment of the present invention.

* Description of Major Symbols in Drawings *

100: electromagnet assembly 110: magnetic pole

111: support plate 112: metal foil

112a: metal sheet disposed on the upper part of the support plate 112b: metal sheet disposed on the lower part of the support plate

112c: Paul shoe groove 120: permanent magnet

121: fixed magnet 122: variable magnet

123: solenoid coil C: crane

D: insulation 200: pole shoe

Claims (8)

In the electromagnet assembly having a pair of magnetic poles including a support plate and a plurality of metal thin plates installed inside the support plate to face each other, and between the pair of magnetic poles, an electromagnet interposed therebetween. The magneto-optic assembly is a magnetic lifter, characterized in that a plurality of installed in the longitudinal direction of the adsorbed material. The method of claim 1, The metal sheet is made of a steel sheet having a high permeability of 7,000 or more permeability, The magnetic pole is composed of an upper magnetic pole and a lower magnetic pole installed under the upper magnetic pole, The magnetic thin plate installed on the upper magnetic pole is superimposed along the long side direction of the magnetic pole, and the magnetic thin plate installed on the lower magnetic pole is superimposed in a direction perpendicular to the metal thin plate installed on the upper magnetic pole. The method according to claim 1 or 2, The bottom of the magnetic pole is made to have a curvature along the long side direction, the bottom of the magnetic pole is a magnetic lifter, characterized in that a plurality of pole shoes rotatably coupled along the curvature is installed. The method of claim 3, wherein The curvature of the magnetic pole is formed on the bottom of the metal sheet superimposed on the lower magnetic pole, The curvature formed on the metal thin plate is a magnetic lifter, characterized in that different curvature for each section. The method of claim 4, wherein Magnetic lifter, characterized in that the upper magnetic pole and the lower magnetic pole is detachably coupled to each other. The method of claim 4, wherein A pole shoe groove is formed on a bottom of the metal sheet overlapped with the lower magnetic pole, The pole shoe is a magnetic lifter, characterized in that coupled to the pole shoe groove. The method according to claim 1 or 2, The electromagnet includes a permanent magnet and a solenoid coil, Magnetic lifter, characterized in that the heat insulating material is further installed below the solenoid coil. The method according to claim 1 or 2, Magnetic lifter, characterized in that the polarity of the adjacent magnetic poles of the plurality of the electromagnet assembly is the same.

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