Plating apparatus for plating inside and outside of pipe

Abstract

The present invention relates to an apparatus for plating the inside and outside of a pipe. The apparatus for plating the inside and outside of the pipe according to the present invention has a technical gist of comprising: a housing accommodating a pipe and a plating solution therein; a first gear member which is provided on one side of the upper portion of the housing to be rotatable, to which one end portion of the pipe is detachably coupled, and which has a first through-hole so that the plating solution accommodated in the housing may flow into the inside of the pipe; a second gear member which is provided on the other side of the upper portion of the housing, to which the other end portion of the pipe is detachably coupled, which is connected to the first gear member via the pipe so as to rotate the first gear member, and has a second through-hole so as to allow an inflow into the pipe; a driving gear member which is provided on one side of the lower portion of the housing and is connected to the second gear member and rotated so as to rotate the first and second gear members; an anode rod which is provided between the first gear member and the second gear member to be located inside the pipe; and an anode plate provided in the housing so as to apply a current to the plating solution.

Description

Plating device for plating the inside and outside of pipes

[0001] The present invention relates to a plating device for plating the inside and outside of a pipe.

[0002] Recently, due to the increase in carbon emissions worldwide, demand for various eco-friendly energy sources for carbon neutrality is increasing. As part of this interest, interest in hydrogen energy is also growing.

[0003] As interest in hydrogen energy grows, demand for hydrogen production, storage, and production facilities is also increasing, and consequently, demand for pipes used to transport hydrogen gas is also increasing.

[0004] However, the pipe for transporting hydrogen gas according to the conventional technology has a problem in that hydrogen embrittlement occurs when hydrogen continuously comes into contact with the inside of the pipe, causing the mechanical properties of the pipe to deteriorate, which reduces the durability of the pipe and, in severe cases, can cause safety accidents such as gas leaks and explosions.

[0005] As a method for solving the above-mentioned problem according to the prior art, it is known that there is a method of changing the material that makes up the pipe and a method of plating the surface of the pipe.

[0006] However, the method of changing the material that makes up the pipe required a complete change in the manufacturing process, which was not only cumbersome but also resulted in enormous costs.

[0007] In addition, the method of plating the surface of a pipe according to the prior art mainly involves melting the metal to plate the surface of the pipe, and therefore, there is a problem that the types of metal that can be plated are limited due to the influence of the melting point of the metal, and there is a problem that it is difficult to form a thin and uniform thickness of the plating layer plated on the surface of the pipe.

[0008] The purpose of the present invention is to solve the above-mentioned problem, and to provide a plating device for plating the inside and outside of a pipe, which enables the surface of a pipe to be modified by forming a uniform plating layer on the surface of the pipe using electroplating without having to change the material of the pipe, and enables plating to be performed simultaneously without having to plating the inside and outside of the pipe separately.

[0009] The purpose of the present invention is not limited to the purposes mentioned above, and other purposes not mentioned can be clearly understood from the description below.

[0010] In order to achieve the above-described object, in one aspect of the present invention, a plating device for plating inside and outside a pipe comprises: a housing accommodating a pipe and a plating solution therein; a first gear member rotatably provided on an upper side of the housing, to which one end of the pipe is detachably coupled, and having a first through-hole formed therein so that the plating solution accommodated inside the housing can flow into the inside of the pipe; a second gear member rotatably provided on the other upper side of the housing, to which the other end of the pipe is detachably coupled, and which is connected to the first gear member through the pipe to rotate the first gear member and has a second through-hole formed therein so that the plating solution can flow into the inside of the pipe; a driving gear member rotatably provided on the other lower side of the housing, connected to the second gear member to rotate, thereby rotating the first and second gear members; an anode rod provided between the first gear member and the second gear member so as to be positioned inside the pipe; And a power connection part provided inside the housing and connected to the pipe and the anode rod for applying current to the plating solution; and an anode plate provided inside the housing for applying current to the plating solution.

[0011] The plating device for plating the inside and outside of a pipe according to embodiments of the present invention having the above-described configuration to achieve the above-described purpose has the following effects.

[0012] A plating device for internal and external plating of a pipe can be provided, which accommodates a pipe and a plating solution inside a housing, supplies power to the pipe, an anode rod, and an anode plate through a power connection, and applies current to the plating solution, thereby simultaneously performing plating on the inside and outside of the pipe.

[0013] FIG. 1 is a perspective view illustrating a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0014] FIG. 2 is a cross-sectional view illustrating a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0015] FIG. 3 is a top view illustrating a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0016] FIG. 4 is a perspective view illustrating a housing of a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0017] FIG. 5 is a perspective view illustrating a first gear member of a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0018] FIG. 6 is a perspective view illustrating a second gear member of a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0019] FIG. 7 is a perspective view illustrating a driving gear member of a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention.

[0020] In order to achieve the above-described object, in one aspect of the present invention, a plating device for plating inside and outside a pipe comprises: a housing accommodating a pipe and a plating solution therein; a first gear member rotatably provided on an upper side of the housing, to which one end of the pipe is detachably coupled, and having a first through-hole formed therein so that the plating solution accommodated inside the housing can flow into the inside of the pipe; a second gear member rotatably provided on the other upper side of the housing, to which the other end of the pipe is detachably coupled, and which is connected to the first gear member through the pipe to rotate the first gear member and has a second through-hole formed therein so that the plating solution can flow into the inside of the pipe; a driving gear member rotatably provided on the other lower side of the housing, connected to the second gear member to rotate, thereby rotating the first and second gear members; an anode rod provided between the first gear member and the second gear member so as to be positioned inside the pipe; And a power connection part provided inside the housing and connected to the pipe and the anode rod for applying current to the plating solution; and an anode plate provided inside the housing for applying current to the plating solution.

[0021] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Meanwhile, the terminology used in this specification is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular includes the plural unless specifically stated otherwise.

[0022]

[0023] Hereinafter, a plating device for plating the inside and outside of a pipe according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0024] A plating device for plating the inside and outside of a pipe according to one embodiment of the present invention may include a housing (100), a first gear member (200), a second gear member (300), a driving gear member (400), an anode rod (500), and an anode plate (600).

[0025] The housing (100) may accommodate a pipe (20) and a plating solution therein.

[0026] The housing (100) has an open top so that a pipe (20) and plating solution can be introduced into the interior through the open top.

[0027]

[0028] The first gear member (200) may be rotatably provided on one side of the upper portion of the housing (100), one end of the pipe (20) may be detachably connected thereto, and a first passage hole (210) may be formed so that the plating solution contained within the housing (100) may flow into the interior of the pipe (20).

[0029] The number of first through holes (210) formed in the first gear member (200) is not limited, but a plurality of them may be formed at a predetermined interval so that the plating solution can smoothly flow into the inside of the pipe (20). For example, as shown in FIG. 5, a plurality of first through holes (210) may be formed at a predetermined interval along the outer circumference of the first gear member (200).

[0030] The first gear member (200) may be formed with a first coupling groove (220) into which one end of the pipe (20) is inserted so that one end of the pipe (20) can be detachably coupled.

[0031] The first joining groove (220) can be formed to have a circumference corresponding to the circumference of one end of the pipe (20) so that one end of the pipe (20) can be joined.

[0032] The first coupling groove (220) may be a groove formed by recessing the first gear member (200) in one direction to a predetermined depth, but is not limited to being formed by penetrating the first gear member (200).

[0033] As shown in Fig. 5, when the pipe (20) is circular, the circumference can be formed along the outer circumference direction of the first gear member (200) in a ring shape corresponding to one end of the pipe (20).

[0034] The first through hole (210) may be formed at a predetermined interval along the first coupling groove (220) so that the plating solution can flow into the interior of the pipe (20) that is one end coupled to the first coupling groove (220), but is not limited thereto, and may be formed in an area of ​​the first gear member (200) that is located relatively inside the first coupling groove (220).

[0035] When the first passage hole (210) is formed at a predetermined interval along the first joining groove (220), the plating solution passes through an area located relatively outside the first joining groove (220) and then passes through an area located relatively inside the first joining groove (220), thereby allowing the plating solution to flow more smoothly into the interior of the pipe (20).

[0036] The first gear member (200) may be provided on one side of the upper portion of the housing (100) with one side spaced apart from the inner surface of the housing (100) so that the plating solution contained inside the housing (100) can pass between the one side and the inner surface of the housing (100) and flow into the inside of the pipe (20) through the first passage hole (210). To this end, the first gear member (200) may have a first protrusion (230) formed to protrude in one direction at the center thereof.

[0037] The first protrusion (230) may be formed to protrude in one direction from one side of the first gear member (200) to separate one side of the first gear member (200) from the inner surface of the housing (100).

[0038] The first protrusion (230) may be connected to the housing (100) so that the first gear member (200) can rotate.

[0039]

[0040] The second gear member (300) may be rotatably provided on the upper side of the housing (100), and the other end of the pipe (20) may be detachably connected thereto, and may be connected to the first gear member (200) through the pipe (20) to rotate the first gear member (200), and a second passage hole (310) may be formed so that the plating solution contained within the housing (100) may flow into the interior of the pipe (20).

[0041] The number of second passage holes (310) formed in the second gear member (300) is not limited, but a plurality of them may be formed at a predetermined interval so that the plating solution can smoothly flow into the inside of the pipe (20). For example, as illustrated in FIG. 6, a plurality of second passage holes (310) may be formed at a predetermined interval along the outer circumference of the second gear member (300).

[0042] The second gear member (300) may be formed with a second coupling groove (320) into which the other end of the pipe (20) is inserted so that the other end of the pipe (20) can be detachably coupled.

[0043] The second joining groove (320) can be formed to have a circumference corresponding to the circumference of one end of the pipe (20) so that the other end of the pipe (20) can be joined.

[0044] The second coupling groove (320) may be a groove formed by recessing one side of the second gear member (300) to a predetermined depth in the other direction, but is not limited to being formed by penetrating the second gear member (300).

[0045] As shown in Fig. 6, when the pipe (20) is circular, the second gear member (300) can be formed in an annular shape with a circumference corresponding to the other end of the pipe (20) along the outer circumference direction.

[0046] In addition, the second passage hole (310) may be formed at a predetermined interval along the second joining groove (320) so that the plating solution can flow into the interior of the pipe (20) whose other end is joined to the second joining groove (320), but is not limited thereto, and may be formed in an area of ​​the second gear member (300) located relatively inside the second joining groove (320).

[0047] The second gear member (300) may be provided on the upper side of the housing (100) so that the other side is spaced apart from the inner side of the housing (100) so that the plating solution contained inside the housing (100) can pass between the other side and the inner side of the housing (100) and flow into the inside of the pipe (20) through the second passage hole (310). To this end, the second gear member (300) may have a second protrusion (330) formed in the center in the other direction.

[0048] The second protrusion (330) may be formed to protrude in the other direction from the other surface of the second gear member (300) to separate the other surface of the second gear member (300) and the inner surface of the housing (100).

[0049] The second protrusion (330) may be connected to the housing (100) so that the second gear member (300) can rotate, and may be provided to face the first protrusion (230).

[0050] The second protrusion (330) may be formed to protrude from the other surface of the second gear member (300) and be connected to the housing (100).

[0051] The first gear member (200) and the second gear member (300) may be provided facing each other so that the pipe (20) can be uniformly plated as it is positioned horizontally inside the housing (100).

[0052] The first gear member (200) and the second gear member (300) may have either a third passage hole (340) formed in the center for the other end of the anode rod (500) to pass through or an insertion groove (240) formed for one end of the anode rod (500) to be inserted.

[0053] However, a third passage hole (340) for passing one end of the anode rod (500) may be formed in at least one of the first gear member (200) and the second gear member (300).

[0054] For example, as shown in FIGS. 5 and 6, the first gear member (200) may have an insertion groove (240) formed in the center for inserting one end of the anode rod (500), and the second gear member (300) may have a third passage hole (340) formed in the center for passing the other end of the anode rod (500).

[0055] Either the third through hole (340) formed in each of the first gear member (200) and the second gear member (300) or the insertion groove (240) for inserting one end of the anode rod (500) may be formed to face each other so that the anode rod (500) can be positioned horizontally inside the pipe (20).

[0056] Either the insertion groove (240) or the third through hole (340) formed in the first gear member (200) may be formed relatively inwardly relative to the first coupling groove (220) so that the anode rod (500) can be positioned inside the pipe (20), and either the insertion groove (240) or the third through hole (340) formed in the second gear member (300) may also be formed relatively inwardly relative to the second coupling groove (320) so that the anode rod (500) can be positioned inside the pipe (20).

[0057] Preferably, either the insertion groove (240) or the third through hole (340) formed in the first gear member (200) may be formed in the center of the first gear member (200), and either the insertion groove (240) or the third through hole (340) formed in the second gear member (300) may also be formed in the center of the second gear member (300).

[0058] Accordingly, either the insertion groove (240) or the third passage hole (340) formed in the first gear member (200) may be formed in an area corresponding to the area where the first protrusion is formed, and either the insertion groove (240) or the third passage hole (340) formed in the second gear member (300) may be formed in an area corresponding to the area where the second protrusion is formed.

[0059] When the insertion groove (240) and the third through hole (340) are formed in the center of the first gear member (200) and the second gear member (300), the distance between the anode rod (500) and the inner surface of the pipe (20) is maintained constant throughout, so that uniform plating can be achieved on the inner surface of the pipe (20).

[0060] Meanwhile, a first mounting groove (110) and a second mounting groove (120) for positioning the first gear member (200) and the second gear member (300) may be formed inside the housing (100).

[0061] The first mounting groove (110) may be formed on one side of the inner surface of the housing (100) so that the first gear member (200) can be mounted thereon.

[0062] The first mounting groove (110) may be formed by recessing one side of the inner surface of the housing (100) in one direction by a predetermined length.

[0063] The first mounting groove (110) can be formed to be curved upward from the center of the housing (100) so that the first gear member (200) is positioned therein.

[0064] The first mounting groove (110) can be formed to have a width that gradually increases from the center toward the top so that the first gear member (200) can be easily positioned.

[0065] The first fixing groove (110) may be formed so that the edge surface is spaced apart from the outer periphery of the first gear member (200).

[0066] When the edge surface of the first fixing groove (110) is formed to be spaced apart from the first gear member (200), the plating solution contained in the housing (100) can pass through the space formed between the edge surface of the first fixing groove (110) and the outer circumference of the first gear member (200), so that the plating solution is supplied more smoothly into the inside of the pipe (20) through the first passage hole (210), and thus the internal plating of the pipe (20) can be performed more effectively.

[0067]

[0068] The second mounting groove (120) may be formed on the inner surface of the other side of the housing (100) to position the second gear member (300).

[0069] The first mounting groove (110) and the second mounting groove (120) can be formed to face each other.

[0070] The second mounting groove (120) may be formed by the inner surface of the other side of the housing (100) being sunken in the other direction by a predetermined length.

[0071] The second mounting groove (120) can be formed to be curved upward from the center of the housing (100) so that the second gear member (300) is positioned therein.

[0072] The second mounting groove (120) can be formed so that its width gradually increases from the center toward the top so that the second gear member (300) can be easily positioned.

[0073] The second fixing groove (120) may be formed so that the edge surface is spaced apart from the outer periphery of the second gear member (300).

[0074] When the edge surface of the second fixing groove (120) is formed to be spaced apart from the second gear member (300), the plating solution contained in the housing (100) can pass through the space formed between the edge surface of the second fixing groove (120) and the outer periphery of the second gear member (300), so that the plating solution is supplied more smoothly into the inside of the pipe (20) through the second passage hole (310), and thus the internal plating of the pipe (20) can be performed more effectively.

[0075]

[0076] The driving gear member (400) is rotatably provided on the lower side of the housing (100), and may be connected to the second gear member to rotate, thereby rotating the second gear member (300) and the first gear member (200).

[0077] For this purpose, teeth may be formed on the driving gear member (400) and the second gear member (300) so that they can mesh with each other.

[0078] When the driving gear member (400) rotates while meshing with the second gear member (300), the second gear member (300) rotates, and accordingly, when the pipe (20) rotates, the first gear member (200) can also rotate by the pipe (20).

[0079] The driving gear member (400) may have a relatively thinner thickness than the second gear member (300) so as to effectively maintain a state of engagement with the second gear member (300).

[0080] The driving gear member (400) can rotate by being connected to an external power device such as a motor, and a driving shaft connection hole (410) for connecting to a driving shaft of the external power device can be formed at the center of the driving gear member (400).

[0081] In addition, the housing (100) may be formed with a drive shaft passage hole (130) that communicates with the drive shaft connection hole (410) and through which the drive shaft passes so that the drive shaft of the external power device can be connected to the drive shaft connection hole (410).

[0082] The drive shaft passage (130) may have a diameter corresponding to the diameter of the drive shaft of the external power device so that it can be closed by the drive shaft of the external power device.

[0083] When the drive shaft passage (130) is closed by the drive shaft of an external power device, the plating solution contained inside the housing (100) can be prevented from leaking out to the outside.

[0084]

[0085] The anode rod (500) can be provided between the first gear member (200) and the second gear member (300) so as to be positioned inside the pipe (20).

[0086] The anode rod (500) can be positioned inside the pipe (20) by having one end inserted into the third through hole (340) and the insertion groove (240) formed in the first gear member (200), and the other end inserted into the third through hole (340) and the insertion groove (240) formed in the first gear member (200).

[0087] At least one of one end and the other end of the anode rod (500) can pass through the third passage hole (340) and be exposed to the outside of the third passage hole (340).

[0088] For example, as illustrated in FIG. 2, the anode rod (500) can pass through the third through hole (340) formed in the second gear member (300) of the other end portion, so that the other end surface can be exposed to the outside of the third through hole (340) of the second gear member (300).

[0089] The anode rod (500) can have a portion that has passed through the third through hole (340) among one end and the other end thereof come into contact with the inner surface of the housing (100), and an electrode connection hole (140) can be formed in the housing (100) so that the portion that has passed through the third through hole (340) among one end and the other end of the anode rod (500) can be exposed to the outside.

[0090] The electrode connection hole (140) is formed in an area corresponding to the area where the part of one end and the other end of the anode rod (500) that has passed through the third passage hole (340) is located so that the part of the one end and the other end of the anode rod (500) that has passed through the third passage hole (340) is exposed to the outside and can be connected to an external power source, thereby allowing the inside and the outside of the housing (100) to be connected.

[0091] The anode rod (500) is exposed to the outside through the electrode connection hole (140) at one end and the other end through the third passage hole (340), but the electrode connection hole (140) can be closed so that the plating solution contained inside the housing (100) is not exposed to the outside through the electrode connection hole (140).

[0092] For example, as illustrated in FIG. 2, the anode rod (500) can have its other end pass through the third passage hole (340) formed in the second gear member (300) to come into contact with the inner surface of the housing (100), and an electrode connection hole (140) can be formed on the other inner surface of the housing (100) so that the other end of the anode rod (500) can be exposed to the outside, and the electrode connection hole (140) can be closed by the other end of the anode rod (500).

[0093]

[0094] The anode plate (600) may be provided inside the housing (100) to apply current to the plating solution contained inside the housing (100).

[0095] The anode plate (600) may be provided on the front inner surface of the housing (100), and a plate fitting groove (160) for fitting the anode plate (600) may be formed on one side and the other side of the front of the housing (100).

[0096] The anode plate (600) is connected to an external power source and can receive electric energy to apply current to the plating solution contained inside the housing (100).

[0097] The plate fitting groove (160) may be formed to have a predetermined depth in the outward direction from each of the inner side and the other side of the housing (100) so that one end and the other end of the positive electrode plate (600) can be fitted therein.

[0098] The anode plate (600) can be connected to an external power source through a clamp wire or the like to receive power from the external power source. To this end, the anode plate (600) can be formed so that one side of the upper portion is exposed toward the upper side of the housing (100).

[0099]

[0100] According to one embodiment of the present invention, a plating device for plating the inside and outside of a pipe can be positioned inside a housing (100) by fixing one end and the other end of the pipe (20) into the first coupling groove (220) and the second coupling groove (320) formed in the first gear member (200) and the second gear member (300) respectively, and after injecting a plating solution into the inside of the housing (100), when an external power source is connected to the anode rod (500), the anode plate (500) and the pipe (20) to supply electric energy, the anode rod (500) and the anode plate (600) serve as the anode, and the pipe (20), which is the plated object, serves as the cathode, so that simultaneous plating can be performed on the outside and inside of the pipe (20).

[0101]

[0102] A plating device for plating the inside and outside of a pipe according to one embodiment of the present invention may further include a power connection unit (700).

[0103] The power connection part (700) can be connected to the pipe (20) and the anode rod (500) to apply current to the plating solution contained inside the housing (100).

[0104] The power connection unit (700) may be connected to an external power source to supply power and apply current to the plating solution through the pipe (20) and the anode rod (500), thereby allowing plating to be performed on the inside and outside of the pipe (20).

[0105] The power connection part (700) may include a first electrode (710) that passes through the open upper part of the housing (100) and has one end connected to an external power source and the other end connected to a pipe (20), and a second electrode (720) that has one end connected to a portion of one end and the other end of the anode rod (500) that passes through the third passage hole (340) and the electrode connection hole (140) and has the other end connected to an external power source.

[0106] The first electrode (710) and the second electrode (720) are connected to the pipe (20) and the anode rod (500), respectively, and may be configured to receive power from an external power source and apply current to the pipe (20) and the anode rod (500) so that the current is applied to the plating solution contained in the housing (100).

[0107]

[0108] Those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering its technical spirit or essential characteristics. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims below rather than the detailed description above, and all changes or modifications derived from the claims and their equivalents should be construed as being included within the scope of the present invention.

[0109] The present invention relates to a plating device for plating the inside and outside of a pipe.

Claims

1. A housing containing a pipe and plating solution inside; A first gear member rotatably provided on one side of the upper portion of the housing, one end of the pipe being detachably connected thereto, and having a first passage formed therein so that the plating solution accommodated inside the housing can flow into the inside of the pipe; A second gear member rotatably provided on the upper side of the housing, to which the other end of the pipe is detachably coupled, connected to the first gear member through the pipe to rotate the first gear member, and having a second passage hole formed therein so as to be introduced into the interior of the pipe; A driving gear member rotatably provided on the lower side of the housing and connected to the second gear member to rotate the first and second gear members; An anode rod provided between the first gear member and the second gear member so as to be positioned inside the pipe; and Including an anode plate provided inside the housing for applying current to the plating solution; Plating device for plating the inside and outside of a pipe.

2. In paragraph 1, The above first gear member The first through-hole is formed to connect the inside of the pipe and the inside of the housing so that the plating solution accommodated in the housing can flow into the inside of the pipe, and a first joining groove is formed into which one end of the pipe is inserted. The above second gear member The second passage hole is formed to connect the inside of the pipe and the inside of the housing so that the plating solution accommodated in the housing can flow into the inside of the pipe, and the second joining groove is formed into which the other end of the pipe is inserted. Plating device for plating the inside and outside of a pipe.

3. In paragraph 1, The above first gear member One side is provided spaced apart from the inner surface of the housing so that the plating solution can pass into the inside of the pipe. The above second gear member The surface is provided spaced apart from the inner surface of the housing so that the plating solution can pass into the inside of the pipe. Plating device for plating the inside and outside of a pipe.

4. In paragraph 3, The above housing First and second fixing grooves are formed on the upper side of one side and the upper side of the other side, respectively, for positioning the first gear member and the second gear member. The above first placement home The first gear member is formed to be bent upward from the center of the housing so that it can be installed, and is formed on one side of the housing so that the width gradually increases. The above second placement home The second gear member is formed to be bent upward from the center of the housing so that the second gear member can be installed, and is formed on the other surface of the housing so that the width gradually increases. Plating device for plating the inside and outside of a pipe.

5. In paragraph 1, The first gear member and the second gear member are formed with either a third through hole in the center for passing one end of the anode rod through, or an insertion groove for inserting one end of the anode rod into, wherein at least one of the first gear member and the second gear member is formed with the third through hole. Plating device for plating the inside and outside of a pipe.

6. In paragraph 5, The above housing An electrode bonding hole communicating with the third pass-through hole is formed on the side where the third pass-through hole is formed. The above anode rod At least one part of the first and second ends is inserted and fixed into the third pass-through hole and the electrode joint hole. Plating device for plating the inside and outside of a pipe.

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