Cover body for permanent magnet and manufacturing method thereof

Abstract

The present invention relates to a cover body for a permanent magnet and a method for manufacturing the same, and more particularly, to a cover body for a permanent magnet, which is formed so as to surround the outer peripheral surface of the permanent magnet used for underwater operation in order to perform sealing and waterproof measures or the like on broken parts caused by various reasons such as common ships or various warships and marine facilities, and a method for manufacturing the same. The cover body for the permanent magnet not only can protect the permanent magnet accommodated therein from external stimuli such as impact and friction, but also can protect the permanent magnet so that the permanent magnet has water resistance and corrosion resistance.

Description

Technical Field

[0001] The present invention relates to a cover for a permanent magnet and a method for manufacturing the same, and more particularly, to a cover for a permanent magnet and a method for manufacturing the same, which is formed to surround the outer peripheral surface of a permanent magnet used when operating in water in order to seal and waterproof holes caused by various reasons in ordinary ships, various warships, marine facilities, etc., thereby protecting the permanent magnet contained therein so that the permanent magnet has water resistance and corrosion resistance. Background Art

[0002] Currently, ships and vessels used for maritime combat purposes frequently suffer from holes in their hulls when engaging the enemy. Not only ships, but also temporary bridges used for combat, naval armored vehicles, oil tanks and other fixed marine facilities may suffer holes in the hull or fuselage due to external impacts.

[0003] In this case, as disclosed in Korean Patent No. 10-1204489, Korean Patent No. 10-2258155, etc., a detachable hole sealing (waterproofing) device with a permanent magnet can be used to temporarily seal and waterproof the hole.

[0004] As we all know, permanent magnets are formed by mixing transition metals such as iron, cobalt, and nickel, i.e. ferromagnetic materials, with rare earth materials such as neodymium, gadolinium, and dysprosium, so as to generate and maintain a stable magnetic field without obtaining external power supply. When permanent magnets are exposed to water (including fresh water and salt water), the surface corrodes and rusts under the action of moisture (including fresh water and salt water), which not only leads to uneven magnetic properties and damages operability, but also there is a risk of water pollution caused by the rust generated by the magnet.

[0005] Korean authorized patent No. 10-0310650 discloses a technology related to a corrosion-resistant permanent magnet and a method for manufacturing the same. By utilizing a thin film formation method to form a surface coating on the permanent magnet, it provides resistance to salt water and wear resistance while having stable magnetic properties. However, in order for the permanent magnet to fully exert its water resistance and corrosion resistance when operating in water, a coating with a uniform and appropriate thickness must be formed, which requires a lot of time and cost.

[0006] In addition, Korean authorized patent No. 10-2073970 discloses a magnet block for underwater operations and related technologies of a flexible anti-corrosion magnet module using the same. The magnet is protected by a cover frame and is watertight with the help of a rubber coating to ensure the structural safety of operations in water. However, the cover frame only protects one side and two side surfaces of the magnet, so the magnet surface not surrounded by the cover frame is difficult to be protected from external impacts, etc., and the rubber coating that covers the magnet and the cover frame to form the outermost edge of the magnet block is difficult to ensure the water resistance and corrosion resistance of the magnet when it is worn or broken due to friction generated by the disassembly and assembly of the hole sealing (waterproofing) device.

[0007] [Patent Literature]

[0008] (Patent Document 1) Korean Utility Model Publication No. 10-0310650 (September 19, 2001);

[0009] (Patent Document 2) Korean Authorized Patent No. 10-2073970 (2020.01.30). Summary of the invention

[0010] Technical issues

[0011] The present invention is proposed to solve the above-mentioned problems. The purpose of the present invention is to provide a cover for a permanent magnet and a method for manufacturing the same, which is formed to surround the outer peripheral surface of a permanent magnet used when operating in water in order to seal and waterproof holes caused by various reasons in ordinary ships, various warships, marine facilities, etc., thereby not only protecting the permanent magnet contained inside from external stimuli such as impact and friction, but also protecting the permanent magnet so that it has water resistance and corrosion resistance.

[0012] The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

[0013] Technical Solution

[0014] In order to achieve the above-mentioned object, according to the present invention, a cover body for a permanent magnet can be provided, wherein the cover body accommodates the permanent magnet inside and protects the permanent magnet so that the permanent magnet has water resistance and corrosion resistance, and comprises: a lower cover part, wherein the lower cover part is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the lower surface of the permanent magnet, and is closely arranged under the permanent magnet; a first side cover part, wherein the first side cover part is formed integrally with the lower cover part, and is bent and extended from both ends of the lower cover part in the length direction in accordance with the height of the permanent magnet, so as to closely fit the lower surface of the permanent magnet; The upper cover portion is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the upper surface of the permanent magnet, and is closely arranged on the upper surface of the permanent magnet, and the upper end portions of the first side cover portion and the second side cover portion are joined and fixed along the edge.

[0015] The feature of the invention is that the cover is made of a metal material that is resistant to corrosion by fresh water or salt water.

[0016] Furthermore, the present invention is characterized in that the thickness of the upper cover portion is formed to be thicker than the thickness of the lower cover portion.

[0017] In addition, to achieve the above-mentioned purpose, according to the present invention, a method for manufacturing a cover body for a permanent magnet can be provided, wherein the cover body accommodates the permanent magnet inside and protects it so that the permanent magnet has water resistance and corrosion resistance, and the method for manufacturing the cover body comprises: a trimming step, cutting each side of a plate formed in a quadrilateral plate shape into a predetermined shape, forming a lower cover portion having a predetermined area corresponding to the lower surface of the permanent magnet in the central portion of the plate, and at the same time, forming a first side cover portion on both sides of the lower cover portion in the length direction, and forming a second side cover portion on both sides of the lower cover portion in the width direction; a lower cover portion configuration step, making one side of the lower cover portion closely facing the upper surface of the permanent magnet, so that the two ends in the length direction and the two ends in the width direction of the lower cover portion are respectively connected to the two ends in the length direction of the permanent magnet and the two ends in the width direction of the permanent magnet, and then The step of adjusting the lower cover portion so that the vertex of the lower cover portion is consistent with the vertex of the permanent magnet; a side cover portion bending step, pressurizing the first side cover portion and the second side cover portion and bending them upward, so that the first side cover portion and the second side cover portion are respectively in close contact with the two side surfaces in the length direction of the permanent magnet and the two side surfaces in the width direction of the permanent magnet; a side cover portion joining step, joining the side end portions of the first side cover portion and the side end portions of the second side cover portion that are connected to each other by welding, so that the side edges of the cover body are sealed; and an upper cover portion fixing step, so that a plate-shaped upper cover portion with a predetermined area corresponding to the upper surface of the permanent magnet is closely arranged on the upper surface of the permanent magnet, and the upper end portions of the first side cover portion and the second side cover portion are joined along the edge of the upper cover portion by welding, so that the upper part of the cover body is sealed.

[0018] At this time, it is characterized in that the cover body is formed of a metal material having corrosion resistance to fresh water or salt water.

[0019] At the same time, it is characterized in that the thickness of the upper cover part is formed to be thicker than the thickness of the lower cover part.

[0020] Effects of the Invention

[0021] The advantage of the present invention is that it is formed to surround the outer peripheral surface of a permanent magnet used when working in water in order to seal and waterproof holes caused by various reasons in ordinary ships, various warships, marine facilities, etc., thereby not only protecting the permanent magnet contained inside from external stimuli such as impact and friction, but also protecting the permanent magnet so that it has water resistance and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A top view of a pad-shaped hole waterproofing device having a permanent magnet protected by a cover for the permanent magnet according to a preferred embodiment of the present invention is shown.

[0023] Figure 2It is a perspective view showing one side of a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0024] Figure 3 It is a perspective view showing the other side of the cover for the permanent magnet according to the preferred embodiment of the present invention.

[0025] Figure 4 It is a cross-sectional view of a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0026] Figure 5 It is an exploded stereoscopic view of a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0027] Figure 6 It is a process diagram showing a method for manufacturing a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0028] Among them, 1: hole waterproof device, 10: permanent magnet, 110: lower cover part, 120: first side cover part, 121: joint part, 130: second side cover part, 140: upper cover part, 141: joint part, 142: combination hole. DETAILED DESCRIPTION

[0029] Refer to the following and attached Figure 1 The advantages and features of the present invention and the methods for achieving them will become clear from the detailed description of the embodiments. However, the present invention is not limited to the embodiments disclosed below, and can be embodied in various forms that are different from each other. However, the embodiments are provided to make the disclosure of the present invention more complete and to fully inform the technical personnel in the technical field to which the present invention belongs of the scope of the invention. The present invention is only defined by the scope of the claims.

[0030] The specific contents required for implementing the present invention are described in detail below with reference to the accompanying drawings. Regardless of the accompanying drawings, the same component marks refer to the same constituent elements, and "and / or" includes all combinations of the mentioned items and more than one.

[0031] Although "first" and "second" are used to describe various components, these components are certainly not limited by these terms. These terms are only used to distinguish one component from other components. Therefore, the first component mentioned below can also be the second component within the technical concept of the present invention.

[0032] The terms used in this specification are used to describe the embodiments and are not intended to limit the present invention. In this specification, as long as it is not specifically mentioned in the sentence, the singular also includes the plural. The "comprises" and / or "comprising" used in the specification do not exclude the existence or addition of one or more other constituent elements in addition to the mentioned constituent elements.

[0033] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this specification can be used as meanings that can be commonly understood by those skilled in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries shall not be interpreted excessively or excessively unless they are clearly defined. The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A top view of a pad-shaped hole waterproofing device having a permanent magnet protected by a cover for the permanent magnet according to a preferred embodiment of the present invention is shown.

[0036] The cover for the permanent magnet of the preferred embodiment of the present invention is formed to surround the outer peripheral surface of the permanent magnet (10) used in underwater operations for sealing and waterproofing holes caused by various reasons in ordinary ships, various warships, marine facilities, etc., so as to protect the permanent magnet contained therein so that it has water resistance and corrosion resistance. Preferably, as Figure 1 As shown, the outer peripheral surface of the permanent magnet (10) is surrounded to protect the permanent magnet (10), wherein the permanent magnet (10) is equipped with a pad-shaped hole waterproof device (1) that is made to seal the hole to perform waterproof measures, so that the hole waterproof device (1) can be easily disassembled and assembled.

[0037] The permanent magnet (10), as the object protected by the cover, is preferably in the shape of a plate with a predetermined thickness, that is, in the shape of a hexahedron, but is not necessarily limited thereto.

[0038] Figure 2 is a three-dimensional view showing one side of a cover for a permanent magnet according to a preferred embodiment of the present invention, Figure 3 is a stereoscopic view showing the other side of the cover for the permanent magnet according to the preferred embodiment of the present invention, Figure 4 It is a cross-sectional view of a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0039] like Figures 2 to 4 As shown, in order to surround the outer peripheral surface of the permanent magnet (10), the cover body generally includes a lower cover part (110), a first side cover part (120), a second side cover part (130) and an upper cover part (140).

[0040] Specifically, the lower cover portion (110) is closely arranged under the permanent magnet (10) in order to protect the lower side of the permanent magnet (10) connected to the hole, and is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the lower side of the permanent magnet (10).

[0041] Then, the first side cover portion (120) and the second side cover portion (130) are respectively closely arranged on the two side surfaces in the length direction of the permanent magnet (10) and the two side surfaces in the width direction of the permanent magnet (10) to protect the side surfaces of the permanent magnet (10). Preferably, the first side cover portion (120) and the second side cover portion (130) can be formed integrally with the lower cover portion (110), and the first side cover portion (120) can be formed by bending and extending from the two ends in the length direction of the lower cover portion (110) respectively in accordance with the height of the permanent magnet (10), and the second side cover portion (130) can be formed by bending and extending from the two ends in the width direction of the lower cover portion (110) respectively in accordance with the height of the permanent magnet (10).

[0042] Then, the upper cover portion (140) is closely arranged on the upper surface of the permanent magnet (10) in order to protect the upper surface of the permanent magnet (10) connected to the hole waterproof device (1), and is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the upper surface of the permanent magnet (10).

[0043] At this time, in order to facilitate the combination of the waterproof hole device (1) and the permanent magnet (10), one or more combination holes (142) can be formed through the cover portion (140). By inserting a combination member (not shown) equipped with the waterproof hole device (1) into the combination hole (142) and connecting it, the permanent magnet (10) will not be separated from the waterproof hole device (1). Preferably, a thread is formed on the inner circumference of the combination hole (142). By connecting it with the combination member (not shown) in the form of a bolt with a thread formed on the outer circumference, the permanent magnet (10) can be combined with the waterproof hole device (1).

[0044] In addition, the thickness of the upper cover portion (140) is preferably formed to be thicker than the thickness of the lower cover portion (110) in order to increase the connection height between the connecting hole (142) and the connecting member (not shown) so that the connecting hole (142) formed on the upper cover portion (140) and the connecting member (not shown) can exert sufficient connection force. Furthermore, by making the thickness of the upper cover portion (140) thicker than the thickness of the lower cover portion (110), the permanent magnet (10) can be more effectively protected from external impacts that may be additionally applied toward the hole waterproofing device (1).

[0045] On the other hand, the portions where the first side cover portion (120) and the second side cover portion (130) are connected to each other, that is, the side ends of the first side cover portion (120) and the second side cover portion (130) adjacent to each other, as well as the edge of the upper cover portion (140) and the upper ends of the first side cover portion (120) and the second side cover portion (130), are joined and fixed to each other by physical or chemical methods, so that the four sides of the cover body can be sealed.

[0046] In this way, by using the cover to surround all surfaces of the permanent magnet (10), the surroundings are sealed, so that when working in water, water cannot flow into the inside of the cover, thereby preventing the permanent magnet (10) from being corroded.

[0047] At this time, the cover body has sufficient durability to protect the permanent magnet (10) from external stimuli such as impact and friction, and has fire resistance so as to protect the permanent magnet (10) from flames when performing underwater welding operations, etc., and because the cover body needs to be non-corrosive even when exposed to water for a long time, it is formed of a material that is resistant to corrosion to fresh water or salt water. Preferably, the cover body can be formed of stainless steel, which is a durable, fire-resistant and corrosion-resistant metal.

[0048] Furthermore, the stainless steel constituting the cover body can be formed of stainless steel having magnetism so as not to affect the magnetic force of the permanent magnet (10) even if it surrounds the outer peripheral surface of the permanent magnet (10).

[0049] Figure 5 This is an exploded perspective view of a cover for a permanent magnet according to a preferred embodiment of the present invention. Figure 6 It is a process diagram showing a method for manufacturing a cover for a permanent magnet according to a preferred embodiment of the present invention.

[0050] Refer to the following Figure 5 and Figure 6 , specifically describing the manufacturing method of the cover body for the permanent magnet in the preferred embodiment of the present invention.

[0051] First, in order to manufacture a cover for protecting the permanent magnet (10), a first plate and a second plate formed in a quadrangular plate shape are prepared.

[0052] The first plate is a raw material that enables the lower cover portion (110), the first side cover portion (120) and the second side cover portion (130) to be formed integrally, and the second plate is a raw material that forms the upper cover portion (140).

[0053] The first plate is prepared and cut into a state where its area corresponds to the area of ​​the bottom and side of the permanent magnet (10) when it is unfolded. At the same time, the second plate is prepared and cut into a state where it has an area corresponding to the top of the permanent magnet (10) so as to form the top cover portion (140).

[0054] In addition, in order to prevent galvanic corrosion caused by contact between different types of metals, the first plate and the second plate are preferably made of the same material. As mentioned above, they can be made of a metal that can fully demonstrate durability, fire resistance and corrosion resistance, especially stainless steel.

[0055] After the first plate and the second plate are prepared, each side of the first plate is cut into a predetermined shape, so that the lower cover portion (110) having a predetermined area corresponding to the lower surface of the permanent magnet (10) is formed in the central portion of the first plate, and at the same time, the first side cover portions (120) are formed on both sides of the lower cover portion (110) in the length direction, and the second side cover portions (130) are formed on both sides of the lower cover portion (110) in the width direction (S10).

[0056] After the trimming step (S10) is performed, one side of the lower cover portion (110) is placed in close contact with the lower surface of the permanent magnet, and the two ends in the length direction and the two ends in the width direction of the lower cover portion (110) are respectively connected to the two ends in the length direction and the two ends in the width direction of the permanent magnet (10), and then adjusted so that the vertex of the lower cover portion (110) is consistent with the vertex of the lower surface of the permanent magnet (10) (S20).

[0057] After the lower cover portion configuration step (S20), the first side cover portion (120) and the second side cover portion (130) are pressurized by a press machine so as to bend upward, so that the first side cover portion (120) and the second side cover portion (130) are respectively in close contact with the two side surfaces in the length direction of the permanent magnet (10) and the two side surfaces in the width direction of the permanent magnet (S30).

[0058] After the side cover portion bending step (S30), the first side cover portion (120) and the second side cover portion (130) adjacent to each other are welded so that the side end portions of the first side cover portion (120) and the side end portions of the second side cover portion (130) connected to each other are joined together, so that the first side cover portion (120) and the second side cover portion (130) form a continuous surface, and at the same time, the side edges of the cover body can be sealed (S40).

[0059] After the side cover portion joining step (S40), the second plate is closely arranged on the permanent magnet (10) so that the second plate constitutes the upper cover portion (140). After adjusting so that both ends of the second plate in the length direction and the width direction are consistent with the ends of the first side cover portion (120) and the second side cover portion (130), the lower ends of the first side cover portion (120) and the second side cover portion (130) are joined along the edge of the upper cover portion (140) by welding, thereby fixing the upper cover portion (140) and sealing the upper part of the cover body (S50).

[0060] The embodiments of the present invention are described above with reference to the accompanying drawings, but those skilled in the art of the present invention will appreciate that the present invention can be implemented in other specific forms without changing its technical ideas or essential features. Therefore, the embodiments described above should be understood in all aspects as merely illustrative and not restrictive.

[0061] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A cover for a permanent magnet, wherein the cover accommodates and protects the permanent magnet so that the permanent magnet has water resistance and corrosion resistance, comprising: A lower cover portion, the lower cover portion is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the lower surface of the permanent magnet, and is closely disposed under the permanent magnet; A first side cover portion, which is formed integrally with the lower cover portion and is bent and extended from both ends of the lower cover portion in the length direction in accordance with the height of the permanent magnet, so as to be closely disposed on both sides of the permanent magnet in the length direction; A second side cover portion, which is formed integrally with the lower cover portion and is bent and extended from both ends of the lower cover portion in the width direction in accordance with the height of the permanent magnet, so as to be closely disposed on both sides of the permanent magnet in the width direction; and The upper cover part is formed in a plate shape with a predetermined thickness and a predetermined area corresponding to the upper surface of the permanent magnet, and is closely arranged on the upper surface of the permanent magnet, and the upper ends of the first side cover part and the second side cover part are joined and fixed along the edge.

2. The cover for a permanent magnet according to claim 1, characterized in that: The cover body is formed of a metal material having corrosion resistance to fresh water or salt water.

3. The cover for a permanent magnet according to claim 1, characterized in that: The thickness of the upper cover portion is formed to be thicker than the thickness of the lower cover portion.

4. A method for manufacturing a cover for a permanent magnet, wherein the cover accommodates and protects the permanent magnet so that the permanent magnet has water resistance and corrosion resistance, the method comprising: A trimming step, wherein each side of the plate formed in a quadrilateral plate shape is cut into a predetermined shape, and a lower cover portion having a predetermined area corresponding to the lower surface of the permanent magnet is formed in the central portion of the plate, and at the same time, a first side cover portion is formed on both sides of the lower cover portion in the length direction, and a second side cover portion is formed on both sides of the lower cover portion in the width direction; A lower cover configuration step, wherein one side of the lower cover is closely attached to the upper surface of the permanent magnet, and both ends of the lower cover in the length direction and the width direction are respectively connected to both ends of the permanent magnet in the length direction and the width direction, and then adjusted so that the vertex of the lower cover is consistent with the vertex of the permanent magnet; a side cover portion bending step, pressurizing the first side cover portion and the second side cover portion and bending them upward so that the first side cover portion and the second side cover portion are respectively in close contact with both side surfaces in the length direction of the permanent magnet and both side surfaces in the width direction of the permanent magnet; a side cover portion joining step of joining the side end portion of the first side cover portion and the side end portion of the second side cover portion which are connected to each other by welding so that the side edge of the cover body is sealed; and The step of fixing the upper cover portion is to arrange a plate-shaped upper cover portion having a predetermined area corresponding to the upper surface of the permanent magnet tightly on the upper surface of the permanent magnet, and to join the upper end portions of the first side cover portion and the second side cover portion along the edge of the upper cover portion by welding to make the upper portion of the cover body airtight.

5. The method for manufacturing a cover for a permanent magnet according to claim 4, characterized in that: The cover body is formed of a metal material having corrosion resistance to fresh water or salt water.

6. The method for manufacturing a cover for a permanent magnet according to claim 4, characterized in that: The thickness of the upper cover portion is formed to be thicker than the thickness of the lower cover portion.

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