阅读说明：本技术 异物捕集装置及包括该异物捕集装置的电工钢板制造设备 (Foreign matter trapping device and electrical steel sheet manufacturing equipment comprising same ) 是由 洪盛喆 闵基荣 朴世珉 金东根 金昌镐 姜正文 权五喆 于 2019-09-18 设计创作，主要内容包括：根据本发明的一个实施例的异物捕集装置可以包括：捕集主体单元,形成有包含异物的空气流入的吸入口和排出异物被去除的空气的排出口；以及混合单元,设置在所述捕集主体单元内部,并且设置在所述空气的流动路径上以引起所述空气的旋转流动,从而在装在内部的洗涤水中形成旋涡。(A foreign matter trapping apparatus according to an embodiment of the present invention may include: a collecting main body unit which is provided with an air inlet into which air containing foreign matters flows and an air outlet from which the air from which the foreign matters are removed is discharged; and a mixing unit provided inside the trapping body unit and provided on a flow path of the air to induce a rotational flow of the air to form a vortex in the washing water contained inside.)

1. A foreign matter trapping device comprising:

a collecting main body unit which is provided with an air inlet into which air containing foreign matters flows and an air outlet from which the air from which the foreign matters are removed is discharged; and

a mixing unit provided inside the trapping body unit and provided on a flow path of the air to induce a rotational flow of the air to form a vortex in the washing water contained inside.

2. The foreign matter trapping apparatus according to claim 1,

the mixing unit includes:

a mixing chamber part provided inside the trap main unit, forming a chamber inlet into which the air flows and a chamber outlet from which the air is discharged, and containing washing water therein; and

a guide part coupled to an inside of the mixing chamber part, guiding the air in the washing water direction, at least a portion of the guide part being formed with a curved surface to form at least a portion of the air flow path in a curved form.

3. The foreign matter trapping apparatus according to claim 2,

the guide portion includes:

a plate member coupled to an upper wall portion of the mixing chamber portion where the chamber inlet is formed and extending downward; and

a curved plate member formed in a curved shape and coupled to a lower end portion of the flat plate member, at least a portion of the curved plate member being immersed in the washing water.

4. The foreign matter trapping apparatus according to claim 3,

the guide portion includes a vortex forming member protrudingly coupled to at least one of the flat plate member and the curved plate member.

5. The foreign matter trapping device according to claim 2,

a communication hole into which the washing water contained in the trap main unit flows is formed at a lower end portion of the mixing chamber part, and the chamber inlet and the chamber outlet are formed at an upper wall portion of the mixing chamber part to be spaced apart from each other.

6. The foreign matter trapping apparatus according to claim 1, comprising:

a water film forming unit disposed inside the trapping body unit and forming a water film by spraying washing water on a flow path of the air.

7. The foreign matter trapping apparatus according to claim 6,

the water film forming unit includes:

a mesh member that is coupled to the inside of the trapping body unit and is provided on a flow path of the air; and

a water film forming spray part coupled to an inside of the trapping body unit, disposed upstream of the mesh member in a flow direction of the air, and spraying washing water to form a water film in the mesh member.

8. The foreign matter trapping apparatus according to claim 7,

the water film forming unit includes an anti-clogging jet part that is incorporated into the interior of the trapping main body unit, is disposed downstream of the mesh member in the flow direction of the air, and jets wash water toward the mesh member to remove foreign matter accumulated in the mesh member.

9. The foreign matter trapping apparatus according to claim 6,

the trapping main unit includes:

a mixing housing part in which the mixing unit is provided and the discharge port is formed; and

and a water film housing part in which the water film forming unit is provided, the suction port is formed, and the water film housing part is communicated with the mixing housing part.

10. The foreign matter trapping apparatus according to claim 9,

the trapping main unit includes:

a water supply spraying part which is provided inside the mixing housing part and sprays washing water; and

a drain part provided at a lower end of the mixing case and discharging the washing water contained therein to the outside.

11. The foreign matter trapping apparatus according to claim 9,

the trapping main body unit includes a suction portion connected to the mixing housing portion, and causes the air to flow in the direction of the discharge port by adjusting negative pressure inside the mixing housing portion.

12. An electrical steel sheet manufacturing apparatus comprising:

a laser chamber for providing an electrical steel sheet;

a laser device disposed inside the laser chamber and forming a groove on a surface of the electrical steel sheet by irradiating laser; and

the foreign matter trapping device according to any one of claim 1 to claim 11, being connected to a cover member that sucks in foreign matter flying from a surface of the electrical steel plate to receive air containing the foreign matter.

Technical Field

The present invention relates to a foreign matter collecting device and an electrical steel sheet manufacturing apparatus including the same.

Background

In order to reduce power loss and improve efficiency of electrical equipment such as a transformer, a grain-oriented electrical steel sheet having magnetic characteristics of low iron loss and high magnetic flux density is required, and for this, a process for producing a domain refining product of the grain-oriented electrical steel sheet, i.e., a domain refining process for improving iron loss by generating grooves by applying a high-power continuous wave laser beam, which can form the grooves, to the surface of the grain-oriented electrical steel sheet, is required.

As an example of the magnetic domain refining process of the oriented electrical steel sheet, a technique of ensuring an improved rate of iron loss after heat treatment of the oriented electrical steel sheet by irradiating a pulse laser Vaporization (Vaporization) material to form grooves has been proposed.

However, the method for refining the permanent magnetic domain as described above requires grooves to be formed on the surface of the steel sheet, and at this time, foreign substances in various forms such as particles, chips (Chip), splashes (splash), and fumes (Fume) are formed on the surface portion of the steel sheet.

These foreign substances need to be removed immediately after generation, and if the generated foreign substances are not removed immediately, there is a problem of contaminating surrounding equipment and deteriorating a working environment.

In particular, when an optical system for transmitting laser light to a steel plate is contaminated, performance is rapidly degraded, and thus there is a problem that groove processing quality and productivity cannot be ensured.

Therefore, it is necessary to perform trapping to completely remove these foreign substances, and in order to trap and remove the foreign substances such as the spatters and the smoke, it is necessary to design the trapping apparatus and method in consideration of the characteristics of the foreign substances such as the spatters and the smoke.

Here, the spatter has an approximately spherical shape, the diameter thereof has a size ranging from several hundred nm to several tens of um, and the components thereof include Fe, Si, C and O, and the steel plate and the water-soluble rolling oil are burned to generate smoke upon irradiation of the groove, so there is a limitation in the trapping using inertial force, gravity and electricity (since the flow thereof depends on the air flow), and there is a problem in that the flow pressure is excessively increased and the filter material is clogged due to the filter material even in consideration of the process of separation by the filter material.

Accordingly, there is a need to research a foreign material trap apparatus capable of improving the above problems or limitations and an electrical steel sheet manufacturing apparatus including the same.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a foreign matter collecting device capable of removing foreign matters and an electrical steel sheet manufacturing device comprising the foreign matter collecting device.

In another aspect, the present invention is directed to provide a foreign matter collecting device and an electrical steel sheet manufacturing apparatus including the same, which can improve the efficiency of removing foreign matter by increasing the mixing rate of washing water when removing foreign matter such as spatter and smoke generated when forming a groove for refining a permanent magnetic domain of an oriented electrical steel sheet.

(II) technical scheme

A foreign matter trapping apparatus according to an embodiment of the present invention may include: a collecting main body unit which is provided with an air inlet into which air containing foreign matters flows and an air outlet from which the air from which the foreign matters are removed is discharged; and a mixing unit provided inside the trapping body unit and provided on a flow path of the air to induce a rotational flow of the air to form a vortex in the washing water contained inside.

Wherein, the mixing unit of the foreign material trapping apparatus according to an embodiment of the present invention may include: a mixing chamber part provided inside the trap main unit, forming a chamber inlet into which the air flows and a chamber outlet from which the air is discharged, and containing washing water therein; and a guide part coupled to an inside of the mixing chamber part, and guiding the air in the washing water direction, at least a portion of the guide part being formed with a curved surface to form at least a portion of the air flow path in a curved form.

In addition, the guide part of the foreign material trap apparatus according to an embodiment of the present invention may include: a plate member coupled to an upper wall portion of the mixing chamber portion where the chamber inlet is formed and extending downward; and a curved plate member formed in a curved shape and coupled to a lower end portion of the flat plate member, at least a portion of the curved plate member being immersed in the washing water.

In addition, the guide part of the foreign material trapping apparatus according to an embodiment of the present invention may include a vortex forming member protrudingly coupled to at least one of the flat plate member and the curved plate member.

Wherein a lower end portion of the mixing chamber part of the foreign matter trapping device according to an embodiment of the present invention is formed with a communication hole into which the washing water loaded in the trapping main unit flows, and the chamber inlet and the chamber outlet are formed at an upper wall portion of the mixing chamber part to be spaced apart from each other.

In addition, the foreign matter trapping apparatus according to an embodiment of the present invention may include a water film forming unit that is disposed inside the trapping body unit and forms a water film by spraying wash water on the flow path of the air.

Wherein, the water film forming unit of the foreign matter trapping apparatus according to an embodiment of the present invention may include: a mesh member that is coupled to the inside of the trapping body unit and is provided on a flow path of the air; and a water film forming spray part which is coupled to the inside of the trapping body unit, is disposed upstream of the mesh member in a flow direction of the air, and sprays washing water to form a water film in the mesh member.

In addition, the water film forming unit of the foreign substance trap device according to one embodiment of the present invention may include an anti-clogging spray part that is coupled to the inside of the trap main unit, is disposed downstream of the mesh member in the flow direction of the air, and sprays washing water toward the mesh member to remove foreign substances accumulated in the mesh member.

In addition, the trapping body unit of the foreign matter trapping device according to one embodiment of the present invention may include: a mixing housing part in which the mixing unit is provided and the discharge port is formed; and a water film housing part in which the water film forming unit is provided, the suction port is formed, and the water film housing part is communicated with the mixing housing part.

In addition, the trapping body unit of the foreign matter trapping device according to one embodiment of the present invention may include: a water supply spraying part which is provided inside the mixing housing part and sprays washing water; and a drain part provided at a lower end portion of the mixing case and discharging the washing water contained therein to the outside.

In addition, the trap body unit of the foreign matter trap device according to an embodiment of the present invention may include a suction part connected to the mixing housing part, and the air is caused to flow toward the discharge port by adjusting negative pressure formation inside the mixing housing part.

An electrical steel sheet manufacturing apparatus according to another embodiment of the present invention may include: a laser chamber for providing an electrical steel sheet; a laser device disposed inside the laser chamber and forming a groove on a surface of the electrical steel sheet by irradiating laser; and a foreign matter trapping device connected to the cover member that sucks in the foreign matter scattered from the surface of the electrical steel sheet to receive the air containing the foreign matter.

(III) advantageous effects

The foreign matter collecting device and the electrical steel sheet manufacturing equipment comprising the same have the effect of removing foreign matters.

On the other hand, the foreign matter collecting device and the electrical steel sheet manufacturing apparatus including the same according to the present invention have an advantage that the foreign matter removing efficiency can be improved by increasing the mixing rate of the washing water when removing foreign matters such as spatters and dusts generated when forming the grooves for refining the permanent magnetic domain of the electrical steel sheet.

Therefore, there are no problems of limitations (because the flow thereof depends on the air flow) at the time of trapping by the inertial force, gravity and electricity, an increase in the air flow dynamic pressure at the time of trapping by the filter material, and clogging of the filter material.

However, various advantageous advantages and effects of the present invention are not limited to the above, and can be more easily understood in describing the detailed embodiments of the present invention.

Drawings

Fig. 1 is a configuration diagram showing a foreign matter trapping apparatus of the present invention.

Fig. 2 is a cross-sectional view showing a mixing unit of the foreign matter trapping device of the present invention.

Fig. 3 is a sectional view showing an embodiment in which the mixing unit of the foreign substance trapping device of the present invention includes a vortex forming member.

Fig. 4 is a sectional view showing a water film forming unit of the foreign matter trapping apparatus of the present invention.

Fig. 5 is a configuration diagram illustrating an electrical steel sheet manufacturing apparatus of the present invention.

Best mode for carrying out the invention

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the embodiments of the present invention may be modified into other various forms, and the scope of the present invention is not limited to the embodiments described below. In addition, embodiments of the present invention are provided to more fully describe the present invention to those of ordinary skill in the art. In the drawings, the shape, size, and the like of components may be exaggerated for clarity of illustration.

In addition, unless the context clearly defines otherwise, a singular expression in this specification includes a plural expression, and the same reference numeral or a reference numeral given in a similar manner denotes the same component or a corresponding component throughout the specification.

The present invention relates to a foreign matter collecting device 1 and an electrical steel sheet S manufacturing facility including the same, which can remove foreign matter and improve the efficiency of removing foreign matter by increasing the mixing rate in washing water W when removing foreign matter such as particles, debris, splashes, and fumes generated when forming grooves for refining the permanent magnetic domain of an oriented electrical steel sheet S.

Therefore, there are no problems of limitations (because the flow thereof depends on the flow of the air a) at the time of collection by the inertial force, gravity, and electric power, an increase in the dynamic pressure of the air flow at the time of collection by the filter material, and clogging of the filter material, thereby improving the conventional foreign matter collecting device 1.

Specifically, referring to the drawings, fig. 1 is a configuration diagram showing a foreign matter trapping apparatus 1 of the present invention, and referring to the drawings, a foreign matter trapping apparatus 1 according to an embodiment of the present invention may include: a collecting body unit 100 formed with an inlet 110 into which air a containing foreign matters flows and an outlet 120 from which the air a from which the foreign matters are removed is discharged; and a mixing unit 200 provided inside the capturing body unit 100 and provided on a flow path of the air a to induce a swirling flow of the air a, thereby forming a vortex in the washing water W loaded inside.

As described above, the foreign matter trapping apparatus 1 of the present application mixes the foreign matter into the washing water W by the mixing unit 200, thereby improving the foreign matter trapping efficiency.

The trap body unit 100 functions as a body of an apparatus including the mixing unit 200, etc., and may form a suction inlet 110 and a discharge outlet 120 to flow in air a containing foreign substances and discharge the air a from which the foreign substances are removed by the mixing unit 200 to the outside.

In addition, since the water film forming unit 300, which will be described later, may be provided in the trap main unit 100, foreign substances contained in the air a may be removed by a plurality of water films, so that the efficiency of removing foreign substances may be further improved.

As described above, the trapping body unit 100 may include: a mixing housing part 130 provided with the mixing unit 200; and a water film housing part 140 provided with the water film forming unit 300.

That is, the trap main unit 100 of the foreign matter trap device 1 according to one embodiment of the present invention may include: a mixing housing part 130 in which the mixing unit 200 is disposed and the discharge port 120 is formed; and a water film housing part 140 in which the water film forming unit 300 is provided and the suction port 110 is formed, and which communicates with the mixing housing part 130.

As described above, after the air a containing the foreign substances flows into the water film housing part 140 through the suction port 110, the foreign substances are primarily captured in the water film forming unit 300, and the primarily filtered air a is delivered to the mixing housing communicating with the water film housing to be discharged to the outside through the discharge port 120 after the foreign substances are secondarily captured in the mixing unit 200.

In addition, the washing water W sprayed from the water film forming unit 300 is loaded at the lower end portion of the water film housing part 140, and the washing water W containing the foreign substances and loaded as described above may be discharged to the outside to pass through a purification process separated from the foreign substances. However, this purification process is not directed to the air a but to the washing water W, and therefore, whichever method is used to purify the washing water W containing the foreign substances is included in the scope of the present invention as a process after the air a containing the foreign substances is filtered by the foreign substance trapping device 1 of the present invention.

The mixing housing part 130 may be formed with an exhaust port 120 that exhausts the air a from which the foreign substances are removed by the mixing unit 200, and the remaining foreign substances may be further removed by a Demister filter 180 before the air a is exhausted through the exhaust port 120.

In addition, the trap body unit 100 may include a supply water injection part 150, and the washing water W is injected on a flow path of the air a by the supply water injection part 150 inside the trap body unit 100 to remove foreign substances from the air a including the foreign substances.

In addition, the trap main unit 100 may further include a drain part 160 for discharging the washing water W containing the foreign substances to the outside as described above when the washing water W sprayed from the supply water spraying part 150 or the washing water W sprayed from the water film forming unit 300 is mounted on a lower end part.

That is, the trap main unit 100 of the foreign matter trap device 1 according to one embodiment of the present invention may include: a supply water spraying part 150 which is provided inside the mixing housing part 130 and sprays washing water W; and a drain part 160 provided at a lower end of the mixing case and discharging the washing water W contained therein to the outside.

The drain part 160 is provided at the lower end of the mixing housing part 130, and may be provided at the lower end of the water membrane housing part 140.

The supply water spraying part 150 is provided in the mixing housing part 130, and the washing water W may be contained inside the mixing unit 200 by supplying the washing water W to the mixing housing part 130.

In addition, the trap body unit 100 may include a suction part 170, the suction part 170 forming an air flow discharged to the outside through the discharge port 120 after sucking air a containing foreign substances from the suction port 110 and removing the foreign substances from the air a through the water film forming unit 300 and the mixing unit 200.

That is, the trap body unit 100 of the foreign matter trap device 1 according to an embodiment of the present invention may include a suction part 170, the suction part 170 being connected to the mixing housing part 130, and the air a may be caused to flow toward the discharge port 120 by adjusting the negative pressure formation inside the mixing housing part 130.

As described above, the flow of the air a containing foreign substances adjusts the flow of the air a according to the degree to which the suction part 170 forms the negative pressure.

For example, the suction part 170 rotates a Fan (Fan) by a motor to form a vacuum pressure inside a Duct (Duct) communicating with the discharge port 120, thereby forming a flow that filters air a containing foreign substances such as spatters and smoke simultaneously through the water film forming unit 300 and the mixing unit 200.

The mixing unit 200 plays a role of mixing the air a containing foreign substances into the washing water W by swirling to collect the foreign substances. Thereby, the foreign substances in the air a containing the foreign substances are removed and the air a is filtered.

In addition, since the mixing unit 200 causes a rotational flow of the air a containing the foreign substances, a vortex is formed in the washing water W by the air a, thereby further improving a contact rate of the washing water W and the air a containing the foreign substances.

To this end, the mixing unit 200 may include a mixing chamber part 210 and a guide part 220, which will be described in detail later with reference to fig. 2 and 3.

Further, the foreign matter trapping apparatus 1 of the present invention may further include a water film forming unit 300, thereby trapping the foreign matter by forming a water film on the flow path of the air a containing the foreign matter.

That is, the foreign matter trapping apparatus 1 according to one embodiment of the present invention may include: a water film forming unit 300 which is provided inside the trapping body unit 100 and forms a water film by spraying washing water W on a flow path of the air a.

In other words, since the air a containing the foreign substances needs to pass through the water film, the water film comes into contact with the foreign substances, and thus the foreign substances in the air a may be mixed into the water film to be removed from the air a.

For this, the water film forming unit 300 may include a mesh member 310, a water film forming injection part 320, and the like, which will be described in detail later with reference to fig. 4.

Fig. 2 is a sectional view showing a mixing unit 200 of the foreign substance trapping apparatus 1 of the present invention, and referring to the drawings, the mixing unit 200 of the foreign substance trapping apparatus 1 according to an embodiment of the present invention may include: a mixing chamber part 210 which is provided inside the trapping main body unit 100, has a chamber inlet 211 into which the air a flows and a chamber outlet 212 from which the air a is discharged, and contains washing water W therein; and a guide part 220 coupled to the inside of the mixing chamber part 210 to guide the air a in the direction of the washing water W, wherein at least a portion of the guide part 220 is formed with a curved surface to form at least a portion of a flow path of the air a in a curved shape.

As described above, the mixing unit 200 includes the mixing chamber part 210 and the guide part 220, and the air a containing the foreign substances forms a vortex in the washing water W to mix the foreign substances into the washing water W for removal.

The mixing chamber part 210 is provided therein with the guide part 220 and contains washing water W therein to provide a space for mixing the air a containing the foreign substances into the washing water.

In addition, the mixing chamber part 210 is provided in the trap main unit 100 and has a communication hole 214 formed at a lower end thereof to receive the washing water W therein, and when the washing water W is received in the trap main unit 100 through the supply water spray part 150, the washing water W in the trap main unit 100 flows in through the communication hole 214.

Here, the mixing chamber part 210 is formed with a chamber inlet 211 and a chamber outlet 212 such that air a containing foreign substances flows in and then foreign substances are removed from the air a containing foreign substances and discharged to the outside, the chamber inlet 211 and the chamber outlet 212 being formed at an upper end portion of the mixing chamber part 210.

That is, the mixing chamber part 210 of the foreign matter trapping device 1 according to one embodiment of the present invention is characterized in that the lower end portion of the mixing chamber part 210 is formed with a communication hole 214 into which the washing water loaded in the trapping body unit 100 flows, and the chamber inlet 211 and the chamber outlet 212 are formed at the upper wall portion 213 of the mixing chamber part 210 to be spaced apart from each other.

However, the chamber inlet 211 and the chamber outlet 212 may be formed at the side wall of the mixing chamber part 210, and at this time, the air a flowing into the side wall part may be guided downward by the flat plate part 221 of the guide part 220.

At least a portion of the guide part 220 includes a curved surface to make the air a flowing in through the chamber inlet 211 form a rotational flow. In particular, the guide part 220 guides the air a flowing in through the chamber inlet 211 in the direction of the washing water W, and a vortex is formed in the washing water W due to a rotational flow of the air a induced in the washing water W as at least a portion of the guide part 220 is immersed in the washing water W.

Therefore, the contact rate between the washing water W and the foreign matter in the air a is increased, and thus the foreign matter is mixed into the washing water W.

More specifically, the guide part 220 includes a flat plate member and a curved plate member 222. That is, the guide part 220 of the foreign material trapping apparatus 1 according to one embodiment of the present invention may include: a flat plate member 221 coupled to the upper wall 213 of the mixing chamber portion 210 in which the chamber inlet 211 is formed, and extending downward; and a curved plate member 222 formed in a curved shape and coupled to a lower end portion of the flat plate member 221, at least a portion of the curved plate member 222 being immersed in the washing water W.

Here, the plate member 221 is coupled to the upper wall portion 213 of the mixing chamber portion 210, and the chamber inlet 211 is formed at the upper wall portion 213 of the mixing chamber portion 210, so that the air a flowing in through the chamber inlet 211 is guided in the direction of the washing water W along the plate member 221.

In addition, the curved plate member 222 includes a curved portion to make the air a to form a swirling flow, and since a portion of the curved plate member 222 is immersed in the washing water W and the air a swirls in the washing water W, the washing water W is swirled to improve a contact rate with foreign substances included in the air a.

Here, the curved plate member 222 may have a shape as shown in fig. 2, but is not limited thereto, and may be the curved plate member 222 of the present application as long as the flow of the air a can be formed into a swirling flow in the washing water W.

For example, fig. 2 shows the shape of the curved plate member 222, and the curved plate member 222 may be formed to have exactly the same radius of curvature, but is not limited thereto, and may be formed such that the radius of curvature gradually increases toward the lower end portion.

Accordingly, since the air a initially in contact with the lower end portion flows along the curved plate member 222 having the radius of curvature gradually decreasing, it is possible to prevent a problem that the flow efficiency of the air a is decreased due to a rapid change in the flow path of the air a.

Fig. 3 is a sectional view showing an embodiment in which the mixing unit 200 of the foreign substance trapping device 1 of the present invention includes a vortex forming member 230, and referring to the drawing, the guide part 220 of the foreign substance trapping device 1 according to an embodiment of the present invention may include a vortex forming member 230, and the vortex forming member 230 is protrudingly coupled to at least one of the flat plate member 221 and the curved plate member 222.

That is, the air a flowing in through the chamber inlet 211 forms a rotational flow by the curved plate member 222 to generate a vortex in the washing water W to improve a contact rate of the foreign substances with the washing water W, and further, a vortex is formed in the washing water W to further improve a contact rate of the foreign substances with the washing water W before the air a is discharged through the chamber outlet 212 by including the vortex forming member 230.

Such a vortex forming member 230 is protrudingly formed at the curved plate member 222, and when two guide parts 220 are formed as shown in fig. 2, the vortex forming member 230 may be provided at the curved plate member 222 of the guide part 220 adjacent to the chamber outlet 212, and the vortex forming member 230 may be provided at the rear surface of the curved plate member 222 as the direction of the chamber outlet 212.

In addition, as shown in fig. 3, the vortex forming part 230 may form a vortex in the washing water W in a form of forming a plurality of vortex forming holes 231 in a plate form, so that the flowing air a may pass through the vortex forming holes 231 and may also bypass the vortex forming holes 231, thereby forming more vortices than the thin film needle plate.

That is, the vortex forming member 230 is characterized in that the vortex forming member 230 is provided in a plate shape having at least one of the flat plate member 221 and the curved plate member 222 coupled thereto, and at least one vortex forming hole 231 is formed.

Fig. 4 is a sectional view showing a water film forming unit 300 of the foreign matter trapping apparatus 1 of the present invention, and referring to the drawings, the water film forming unit 300 of the foreign matter trapping apparatus 1 according to an embodiment of the present invention may include: a mesh member 310 that is coupled to the inside of the trapping body unit 100 and is provided on a flow path of the air a; and a water film forming spray part 320 coupled to the inside of the trapping body unit 100, disposed upstream of the mesh member 310 in the flow direction of the air a, and spraying washing water W to form a water film in the mesh member 310.

As described above, the water film forming unit 300 includes the mesh member 310 and the water film forming injection part 320, and thus a water film through which air a containing foreign substances passes can be formed, and since the air a needs to pass through the water film, the water film and the foreign substances come into contact, so that the foreign substances in the air a can be mixed into the water film to remove the foreign substances from the air a.

In particular, since the water film forming spray part 320 sprays the washing water W to the mesh member 310 formed with a plurality of holes, the water film can be more easily formed due to the viscosity of the washing water W.

In addition, the water film forming unit 300 of the foreign substance trap device 1 according to one embodiment of the present invention may include an anti-clogging spray part 330, which is incorporated into the inside of the trap main unit 100, is disposed downstream of the mesh member 310 in the flow direction of the air a, and sprays the washing water W toward the mesh member 310 to remove the foreign substances accumulated in the mesh member 310.

In order to prevent the problem of the formation of the water film being hindered by the foreign substances staying in the plurality of holes of the mesh member 310, the clogging prevention spraying part 330 as described above is provided downstream of the flow of the air a, which is the opposite direction of the flow direction of the air a, to spray the washing water W toward the mesh member 310.

For example, as shown in fig. 4, the anti-clogging spray part 330 is provided at a lower portion of the mesh member 310, and sprays the washing water W from top to bottom to the mesh member 310 through which the air a passes from an upper portion to a lower portion.

Fig. 5 is a configuration diagram illustrating an electrical steel sheet S manufacturing apparatus of the present invention, and with reference to the attached drawings, the electrical steel sheet S manufacturing apparatus according to another embodiment of the present invention may include: a laser chamber 2 for providing an electrical steel sheet S; a laser device 3 disposed inside the laser chamber 2 and forming a groove on a surface of the electrical steel sheet S by irradiating a laser; and the foreign matter trapping device 1 connected to a cover member 2a that sucks the foreign matter scattered from the surface of the electrical steel sheet S to receive the air a containing the foreign matter.

As described above, the manufacturing apparatus of an electrical steel sheet S of the present invention includes the laser device 3 to produce a domain refinement product by forming grooves on an oriented electrical steel sheet S, and the foreign matter trap device 1 to remove foreign matters such as spatters and fumes generated when the grooves are formed by the laser device 3.

Here, the laser chamber 2 may be provided with the laser device 3, and a cover member 2a for conveying the air a containing foreign matters to the foreign matter trapping device 1 may be provided. In addition, an electrical steel sheet S is transported to the laser chamber 2.

In addition, in the laser chamber 2, air curtains 2c may be formed at the entrance and exit of the electrical steel sheet S to be sealed from the outside, and rollers 2b for supporting the movement of the electrical steel sheet may be provided.

The laser apparatus irradiates a laser to form a groove on the electrical steel sheet S. For example, the laser device 3 is composed of an On and Off control system, a laser oscillator, and an optical system, and the On and Off control system can turn On (On) the oscillator under normal working conditions and can automatically turn Off (Off) the oscillator according to the amount of lateral movement of the steel sheet.

Although the embodiments of the present invention have been described above, the scope of rights of the present invention is not limited thereto, and it will be apparent to those of ordinary skill in the art to which the present invention pertains that various modifications and variations can be made to the present invention within the scope not departing from the technical idea of the present invention recited in the claims.