Cylindrical parallel electrode and electrolytic plating device using the same

Abstract

To provide a cylindrical parallel electrode with a watertight connection structure that can be easily attached and detached by hand by improving the structure of the connection portion between the cylindrical membrane electrode and the upper and lower connecting tanks, and to provide an electrolytic plating device using this electrode.SOLUTION: In an embodiment according to the present invention, the connection part between a cylindrical membrane electrode 1 and upper and lower communication tanks 7 and 8 are joined using union joints. The union joints are used to break off a straight tube part of piping and connect them in a detachable, airtight or watertight manner. The upper and lower communication tanks 7 and 8 are connected to the cylindrical membrane electrode 1, and union threads 12 are joined (fastened) to both ends of the cylindrical membrane electrode 1, the straight tube part of a connecting member is welded to the mounting parts of the upper and lower communication tanks, and a union screw 12 and the connecting member are interspersed with a first packing, and the union nut 13 is tightened to establish watertight connection between the cylindrical membrane electrode 1 and the upper and lower communication tanks.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a membrane-equipped electrode used in electrolytic processes such as electrodeposition coating and electrolysis, and in particular to a cylindrical parallel electrode which can be easily disassembled and assembled, and an electrolytic plating apparatus using the same. [Background technology]

[0002] Electrodes with diaphragms (hereinafter referred to as diaphragm electrodes) are often used in electrolytic cells used in electrolytic processes such as electrolytic plating and electrolysis. Diaphragm electrodes are formed by integrating an electrode body and an ion exchange membrane (used to adjust the balance of positive and negative ions in the electrolyte), and come in a wide variety of types and structures. The present applicant has previously proposed a "cylindrical parallel electrode for plating" as a new diaphragm electrode (Patent Document 1).

[0003] The present invention relates to an improvement in the structure of the cylindrical parallel electrode for plating. First, this cylindrical parallel electrode for plating will be described. Fig. 1 is a schematic cross-sectional view showing the structure of a prior art membrane electrode. As shown in Fig. 1, this cylindrical membrane electrode 1 has a three-layer structure in which a core material 2-1, a cylindrical ion exchange membrane 3, and a cylindrical protective membrane 4 are arranged on the outside of a cylindrical electrode body 2. The electrode body 2 is made of a material having electrical conductivity and water permeability, such as a copper wire mesh.

[0004] The ion exchange membrane 3 is made of a thin film of porous ion exchange resin, and is extremely thin, at 0.3 mm to 0.5 mm. Therefore, in order to prevent deformation and damage of the ion exchange membrane 3, it is protected by an outer protective film 4. The protective film 4 is water permeable and is made of, for example, a porous resin film.

[0005] At its upper end is disposed an upper mounting part 5, and at its lower end is disposed a lower mounting part 6. The reason why these mounting members are necessary is that the strength of the cylindrical diaphragm electrode is low, and it is difficult to fix it directly. Although details are omitted, the electrode body 2 is provided with a conductive portion, which is configured to supply power to the electrode body by contacting a power supply terminal.

[0006] In addition, the vertical and horizontal scale ratios are different in Fig. 1 for convenience of drawing, but the size of the cylindrical diaphragm electrode 1 is about 70 mm in diameter and about 1000 mm in length. This cylindrical diaphragm electrode 1 with a three-layer structure is connected to a pair of upper and lower communicating tanks 7 and 8 shown in Fig. 2, and the electrode liquid is supplied thereto. In other words, these communicating tanks are fixed to the electrode liquid piping via a flange 10 shown in Fig. 2.

[0007] Fig. 2 is a schematic cross-sectional view showing the mounting structure of a cylindrical diaphragm electrode in the prior art. An upper mounting part 5 of a cylindrical diaphragm electrode 1 (three-layer structure is not shown for simplicity) is connected to a hole (also called an upper communicating tank mounting part) in the bottom surface of an upper communicating tank 7, and a lower mounting part 6 is connected to a hole (also called a lower communicating tank mounting part) in the bottom surface of a lower communicating tank 8. In the prior art, the connecting parts (parts surrounded by dashed circle in the figure) are welded.

[0008] In addition, electrolytic power must be supplied to the electrode body 2 of the cylindrical diaphragm electrode 1. In this example, a power supply terminal 9 is provided at the top of the upper communicating tank 7 for each cylindrical diaphragm electrode, and power is supplied to the electrode body 2 by contacting the conductive part of the upper mounting part 5 with a contactor (not shown) provided inside the tank.

[0009] The reason for arranging multiple cylindrical diaphragm electrodes 1 in parallel and close to each other is to make the electrolytic strength in the electrolytic cell as uniform as possible, thereby making the plating thickness of the object to be plated (workpiece) uniform. The number of cylindrical diaphragm electrodes arranged in parallel is increased or decreased according to the width of the electrolytic cell. Furthermore, a large number of units in which multiple cylindrical membrane electrodes are arranged in parallel (referred to as "cylindrical parallel electrodes" in this specification) are arranged at a predetermined interval so as to be perpendicular to the longitudinal direction of the electrolytic cell.

[0010] [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP 2020-45531 A DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0012] In the electrolytic cell using the cylindrical parallel electrodes for plating of Patent Document 1, multiple cylindrical diaphragm electrodes are installed in the cell, but some of the cylindrical diaphragm electrodes may be damaged during electrolytic plating. In such a case, in the cylindrical parallel electrodes described in Patent Document 1, the cylindrical diaphragm electrodes and the upper and lower communicating tanks are firmly welded to ensure watertightness. Therefore, even if only some of the cylindrical diaphragm electrodes are damaged, they must be replaced with new cylindrical parallel electrodes. To do this, it is necessary to request the delivery of new cylindrical parallel electrodes from the manufacturing factory, which results in a problem of time and cost required for recovery.

[0013] In the cylindrical parallel electrodes described in Patent Document 1, it is also possible to replace some of the damaged cylindrical diaphragm electrodes with new cylindrical diaphragm electrodes. However, in order to perform such replacement work in an electrolytic cell containing an electrolyte at the site, it is necessary to remove the bolts of the flange 10, take out the row of cylindrical parallel electrodes to the outside, and perform the work of cutting and reattaching the damaged cylindrical diaphragm electrodes at another work site. In addition, the watertightness of the welded parts must be verified, and since these work require expertise, it is almost impossible to perform them at the plating site. For this reason, some of the damaged cylindrical parallel electrodes must be transported to the manufacturing factory, repaired, replaced, and then re-delivered, and during this time, the operation of electrolytic plating is interrupted, which causes a problem of a decrease in the operating rate of the electrolytic plating cell.

[0014] If the connection between the cylindrical membrane electrode and the upper and lower connecting tanks could be easily attached and detached even by a person without specialized knowledge of welding, etc., the worker would be able to replace the cylindrical membrane electrode in an electrolytic cell containing an electrolyte while wearing a rubber suit and rubber gloves, which is expected to significantly improve the operating rate of the plating cell.

[0015] In addition, since the manufacturing plant for cylindrical parallel electrodes and the electrolytic plating plant are usually located far apart, a large number of cylindrical parallel electrodes must be transported by transport vehicle when starting up the plating plant (a large electrolytic cell uses more than ten rows of cylindrical parallel electrodes). In the case of the cylindrical parallel electrodes of the prior art, the cylindrical diaphragm electrode and the upper and lower communicating tanks are integrated to form a fairly large, thick plate-like structure.

[0016] In addition, when transporting, each structure must be individually packaged to protect the electrodes, which results in very high packaging costs. In addition, the packaged structures are bulky, which limits the number of structures that can be loaded onto a transport vehicle, resulting in high transportation costs. In particular, when shipping overseas, the cylindrical parallel electrodes in the conventional technology have a large volume, so air freight cannot be used and transportation is limited to sea freight, which results in a problem of a long time required for recovery.

[0017] On the other hand, if the connecting portion between the cylindrical diaphragm electrode and the upper and lower communicating tanks could be easily attached and detached by hand, the cylindrical diaphragm electrode could be bundled and packed, and the upper and lower communicating tanks could be transported separately, and assembly could be performed at the plating factory. This would enable a significant reduction in packaging and transportation costs.

[0018] Therefore, an object of the present invention is to improve the structure of the connecting portion between the cylindrical diaphragm electrode and the upper and lower communicating tanks in the cylindrical parallel electrode proposed in Patent Document 1, and to provide a connecting structure that can be easily attached and detached by human power and is watertight. [Means for solving the problem]

[0019] In order to solve the above problems, the present invention provides a cylindrical parallel electrode in which a plurality of cylindrical diaphragm electrodes are watertightly and detachably connected to an upper communicating tank and a lower communicating tank through which an electrode liquid flows, A connecting member A includes a straight flanged union pipe with a flange at one end and a union nut slidably attached to the outer periphery of the flanged union pipe and having a female thread formed on the inside; A connecting member B includes a straight flangeless union pipe and a union nut slidably attached to the outer periphery of the flangeless union pipe and having a female thread formed on the inside; A C-shaped connecting member having a male screw formed on the outer periphery of one end thereof, the male screw engaging with the female screw; A first packing is interposed between the A connecting member and the C connecting member; and a second packing attached to a desired position of the flangeless union pipe, The other end of the A connecting member or the other end of the B connecting member is welded to a hole portion of the upper communication tank and a hole portion of the lower communication tank, The other end of the C-connecting member is fixed to both ends of the cylindrical diaphragm electrode, The cylindrical diaphragm electrode is configured to be detachable by rotating the union nut.

[0020] The cylindrical parallel electrode of the present invention is characterized in that the above three connecting members are arranged in combination with the hole of the upper communicating tank, the hole of the lower communicating tank, and the upper and lower ends of the cylindrical diaphragm electrode, so as to form a combination of the above C connecting member and the above A connecting member, or the above C connecting member and the above B connecting member. These combinations are total of 16 combinations.

[0021] The electrolytic plating apparatus of the present invention is characterized in that a plurality of the cylindrical parallel electrodes as described above are disposed in an electrolytic cell, the apparatus comprising: an electrode solution circulating means for circulating the electrode solution from the upper communicating tank to the lower communicating tank; and a power supplying means for supplying power for electrolysis to each of the cylindrical parallel electrodes. Effect of the Invention

[0022] According to the present invention, the connection between the cylindrical diaphragm electrode and the upper and lower communicating tanks can be easily attached and detached by anyone. If the diaphragm electrode is damaged, for example, an operator can replace the cylindrical diaphragm electrode in an electrolytic cell containing an electrolyte while wearing a rubber suit or rubber gloves. This makes it possible to significantly improve the operating rate of the plating cell.

[0023] In addition, when the cylindrical parallel electrodes of the present invention are transported from a manufacturing factory to a remote electrolytic plating factory, the cylindrical diaphragm electrodes can be bundled and packed, and the cylindrical diaphragm electrodes and the upper and lower communicating tanks can be transported separately, and then assembled at the plating factory, since the connecting parts between the cylindrical diaphragm electrodes and the upper and lower communicating tanks have a structure that allows anyone to easily attach and detach them. This makes it possible to significantly reduce packaging and transportation costs. BEST MODE FOR CARRYING OUT THEINVENTION

[0024] In the embodiment of the present invention, the connecting portion between the cylindrical diaphragm electrode and the upper and lower communicating tanks is joined by using a union joint. The union joint is used as a method for dividing a straight pipe portion of a pipe and removably connecting the divided portion in an airtight or watertight manner.

[0025] Fig. 3 is a diagram for explaining the structure of the union joint, where Fig. 3(a) is a schematic cross-sectional view of the component configuration, and Fig. 3(b) is a schematic cross-sectional view after connection. As shown in Fig. 3, the union joint is composed of a flanged union pipe 11, a union screw 12 with a male screw portion 17 formed on the outer periphery, a union nut 13 with a female screw portion 18 formed on the inner surface, and a first packing 14 (e.g., an O-ring).

[0026] The flanged union pipe 11 has a flange-shaped protrusion 16 at the tip of one straight pipe section 15a. The union thread 12 has a male thread section 17 formed on the outer periphery of the straight pipe section 15b. The union nut 13 is a ring-shaped part, and has a female thread section 18 (that screws with the male thread section 17 of the union thread 12) and a shoulder section 19 formed on its inner surface.

[0027] With the tip faces of the flanged union pipe 11 and the union screw 12 butted together with the first packing 14 in between, the female threaded portion 18 of the union nut 13 is screwed into the male threaded portion 17 of the union screw 12 and the screw is tightened, so that the shoulder portion 19 of the union nut 13 presses against the flange-shaped protrusion portion 16 from the back, thereby pressing the first packing 14 against the joint surfaces of the two straight pipe sections, maintaining air-tightness or water-tightness.

[0028] The body 20 of the union nut 13 is shaped to facilitate screw tightening. For example, when the diameter of the union nut 13 is large, the body 20 is cylindrical and has a vertical groove of about 5 mm in width formed on the entire outer circumference to provide an anti-slip function. When the diameter of the union nut 13 is small, the body 20 of the union nut is shaped like a hexagonal column to facilitate tightening with a wrench or the like.

[0029] 4 is a cross-sectional schematic diagram showing the structure of a connection part that connects the cylindrical diaphragm electrode 1 and the upper communicating tank 7 with a union joint in the first embodiment of the present invention. The straight pipe part 15a of the flanged union pipe 11 is joined to the hole in the bottom plate 21 of the upper communicating tank, and a flange-shaped protrusion part 16 is attached to the tip of the straight pipe part 15a. The union nut 13 is attached to the outer periphery of the flanged union pipe before the straight pipe part 15a is joined. In this specification, the combination of the flanged union pipe 11 and the union nut 13 is referred to as the A connecting member.

[0030] A straight pipe portion 15b of a union screw 12 having a male screw portion 17 is joined to the upper end of the cylindrical diaphragm electrode 1. In this specification, the union screw 12 is referred to as a C connecting member. When the end of the flanged union pipe 11 and the end of the A connecting member are butted together with the first packing 14 in between and the union nut 13 is tightened, the cylindrical diaphragm electrode 1 is watertightly and detachably connected to the bottom surface of the upper communicating tank.

[0031] Similarly, the straight pipe section 15a of the flanged union pipe 11 is welded to the hole in the upper plate 22 of the lower communicating tank, and the union nut 13 is attached to the outer circumference of the flanged union pipe before the straight pipe section 15a is welded. The straight pipe section 15b of the union screw 12 having the male screw section 17 is fixed to the lower end of the cylindrical diaphragm electrode 1. The tip of the A connecting member and the tip of the C connecting member are butted together with the first packing 14 in between, and the union nut 13 is tightened, so that the cylindrical diaphragm electrode 1 is watertightly and detachably connected to the bottom surface of the lower communicating tank. Since the cylindrical diaphragm electrode 1 does not necessarily have high rigidity, it can be given a certain degree of deflection when it is attached and removed. Therefore, even if the interval between the upper communicating tank 7 and the lower communicating tank 8 is fixed, the cylindrical diaphragm electrode can be attached and removed.

[0032] Fig. 5 is a diagram showing the structure of a cylindrical diaphragm electrode in one embodiment of the present invention. As shown in Fig. 5, a union screw 12 (C connecting member) is joined to the upper mounting portion 5 and the lower mounting portion 6 of the cylindrical diaphragm electrode 1. Fig. 6 is a diagram showing a state in which the cylindrical diaphragm electrode 1 is connected to the upper and lower communicating tanks in one embodiment of the present invention. Fig. 6 shows a state in which the union screw 12 is joined (fixed) to both ends of the cylindrical diaphragm electrode 1 shown in Fig. 5, the straight pipe portion 15a of the A connecting member is welded to the mounting portion of the upper communicating tank and the mounting portion of the lower communicating tank, and the union screw 12 and the A connecting member are connected to the upper and lower communicating tanks with a first packing 14 interposed therebetween, and the union nut 13 is fastened to watertightly connect the cylindrical diaphragm electrode 1 to the upper and lower communicating tanks.

[0033] Fig. 7 is a schematic cross-sectional view showing the structure of a connection part that connects the cylindrical diaphragm electrode 1 and the upper communicating tank 7 with a union joint in a second embodiment of the present invention. The difference between the structure of the connection part that connects the cylindrical diaphragm electrode 1 and the upper communicating tank and the lower communicating tank with a union joint shown in Fig. 4 and the structure of the connection part shown in Fig. 7 will be described.

[0034] Fig. 7(a) is a schematic cross-sectional view of the component configuration, and Fig. 7(b) is a schematic cross-sectional view after connection. As shown in Fig. 7, the union joint of the second embodiment is composed of a flangeless union pipe 11-1, a union screw 12, a union nut 13, and a second packing 14-1.

[0035] Here, the flangeless union pipe 11-1 consists only of a straight pipe portion 15a, and does not have a flange-shaped protrusion 16 at the tip of the straight pipe portion 15a as in Example 1. The second packing 14-1 is a ring-shaped elastic body made of rubber or the like and having a predetermined width, with tapers of a predetermined length formed on both peripheries.

[0036] The second packing 14-1 is inserted into the straight pipe section 15a of the flangeless union pipe 11-1, tightens the straight pipe section 15a to be in close contact, and is fixed in the desired position by the frictional force. Therefore, it does not easily move from the specified position, but the position of the second packing 14-1 may be shifted (changed) by a force exceeding the frictional force between the second packing 14-1 and the straight pipe section 15a, for example, a tightening force caused by turning the union nut 13.

[0037] By screwing the union nut 13 onto the union thread 12 and tightening it, the end of the second packing 14-1 comes into close contact with the shoulder 19 of the union nut 13 while gradually shifting as it comes into close contact with the union thread 12. The end of the straight pipe section 15b of the union thread that comes into contact with the second packing 14-1 and the shoulder 19 of the union nut 13 are tapered in opposite directions so as to come into close contact with the tapers of the second packing 14-1.

[0038] 8 is a schematic cross-sectional view showing a structure in which the straight pipe portion 15b of the union screw 12 (C connecting member) is welded to the hole of the upper communicating tank 7 in the second embodiment of the present invention, and the straight pipe portion 15a of the flangeless union pipe 11-1 of the B connecting member is fixed to the end of the cylindrical diaphragm electrode 1, thereby connecting the upper communicating tank 7 and the cylindrical diaphragm electrode 1 by the C connecting member and the B connecting member. The other end of the union screw 12, on which a male thread portion 17 is formed, is joined to the hole of the bottom plate 21 of the upper communicating tank.

[0039] A straight pipe section 15a, which is a flangeless union pipe 11-1, is joined to both ends of the cylindrical diaphragm electrode 1. A union nut 13 is attached to the outer periphery of the flangeless union pipe 11-1. In this specification, the combination of the flangeless union pipe 11-1 and the union nut 13 is referred to as a B connection member.

[0040] The ring-shaped packing 14-1 is inserted into the flangeless union pipe 11-1 (straight pipe section 15a) and is fixed in close contact with the straight pipe section 15a at a predetermined position. One end of the second packing 14-1 comes into close contact with the shoulder section 19 of the union nut 13. When the straight pipe section 15a is fitted into the union screw 12 and the union nut 13 is tightened, the male screw section 17 of the union screw 12 and the female screw section 18 of the union nut 13 screw together, causing the tapered section formed on the ring-shaped second packing 14-1 to come into close contact with the shoulder section 19 of the union nut 13 and the tapered section of the straight pipe section 15b, thereby preventing leakage of the electrode liquid. The method of connecting the cylindrical diaphragm electrode to the lower communicating tank is exactly the same as that described above. Since the position (installation position) of the straight tube section 15a of the second packing 14-1 shifts as it is tightly attached to the straight tube section 15a by rotating (tightening) the union nut 13, it is possible to adjust the variation in the length of the cylindrical diaphragm electrode during manufacturing.

[0041] The detachable connecting structure of the second embodiment has a more remarkable effect of adjusting the variations that occur during the manufacture of the cylindrical diaphragm electrode than the detachable connecting structure of the first embodiment, and also has an advantage of reducing the stress (tensile force) applied to the cylindrical diaphragm electrode 1 more than the connecting structure of the first embodiment.

[0042] The connection structure of the first embodiment ensures watertightness by butting the flange-shaped protrusion 16 and the male screw portion 17 with the first packing 14, which is an O-ring, and tightening the union nut 13. For this reason, the length of the cylindrical diaphragm electrode must be approximately the same as that of the replacement electrode before replacement. For example, if the cylindrical parallel electrode is shorter than the old cylindrical diaphragm electrode, tightening the union nut 13 will extend the cylindrical parallel electrode. In addition, the O-ring will be compressed and shrunk, which will have an adverse effect of exerting a tensile force on the cylindrical diaphragm electrode 1.

[0043] In contrast, in the detachable connection structure according to the second embodiment, the straight tube portion 15b is inserted into the ring-shaped second packing 14-1 having tapers formed on both peripheries as described above, and the ring-shaped second packing 14-1 is shifted little by little by tightening the union nut 13 so that it comes into close contact with the tapered portion of the shoulder portion 19 of the union nut 13 and also comes into close contact with the reverse tapered portion formed on the end of the straight tube portion 15b of the union thread 12. Therefore, even if there is variation in the length of the cylindrical diaphragm electrode 1, the variation is adjusted by the shifting of the ring-shaped second packing 14-1. In addition, since no tensile force is applied to the cylindrical diaphragm electrode 1 by tightening the union nut 13, the stress (tensile force) applied to the cylindrical diaphragm electrode 1 is reduced.

[0044] That is, in the connection structure of the second embodiment, the position where the second packing 14-1 is inserted into and tightly fitted to the straight tube portion 15a changes by rotating the union nut 13, thereby adjusting the variation in length during manufacture of the cylindrical diaphragm electrode 1. Also, the contact portion between the second packing 14-1, the straight tube portion 15b, and the shoulder portion 19 is tapered, so that the area of ​​the contact portion is increased, and the second packing 14-1 at the contact portion expands laterally when the union nut 13 is tightened, thereby ensuring more reliable watertightness.

[0045] FIG. 9 is a diagram showing a combination of the A connecting member, B connecting member, and C connecting member shown in the first and second embodiments of the present invention, in which the cylindrical diaphragm electrode 1 is watertightly and detachably connected to the upper communicating tank 7 and the lower communicating tank 8. 9(a), the straight pipe portion 15a of the A connecting member is welded to the hole of the upper communicating tank 7, and the other end of the C connecting member, which has one end formed with a male thread portion 17 that screws into a male thread portion 18 formed on the inside of the union nut 13 of the A connecting member, is fixed to the upper mounting portion 5 of the cylindrical diaphragm electrode 1. By interposing a first packing 14 between the A connecting member and the C connecting member and tightening the union nut 13 of the A connecting member, the upper communicating tank 7 and the upper portion of the cylindrical diaphragm electrode 1 are connected watertightly and detachably.

[0046] A straight pipe portion 15b of the C connecting member is welded to the hole of the lower communication tank 8. A straight pipe portion 15a, which is the other end of the A connecting member or the B connecting member, is fixed to the lower mounting portion 6 of the cylindrical diaphragm electrode 1, and has a male thread portion 18 formed at one end thereof that screws with the male thread portion 17 of the C connecting member. When the A connecting member is fixed, the lower communication tank 8 and the cylindrical diaphragm electrode 1 are connected watertight and detachably by interposing a first packing 14 between the A connecting member and the C connecting member and tightening a union nut 13. When the B connecting member is fixed, a second packing 14-1 is interposed between the B connecting member and the C connecting member and tightening a union nut 13 of the B connecting member, thereby connecting the lower communication tank 8 and the lower portion of the cylindrical diaphragm electrode 1 watertight and detachably.

[0047] In Fig. 9(b), a straight pipe portion 15a of the B connecting member is welded to the hole of the upper communicating tank 7. The other end of the C connecting member is fixed to the upper mounting portion 5 of the cylindrical diaphragm electrode 1. The C connecting member has one end formed with a male thread portion 17 which screws into a male thread portion 18 formed on the inside of the union nut 13 of the B connecting member. By interposing a second packing 14-1 between the B connecting member and the C connecting member and tightening the union nut 13 of the B connecting member, the upper communicating tank 7 and the upper portion of the cylindrical diaphragm electrode 1 are connected watertightly and detachably.

[0048] A straight pipe section 15b of the C connecting member is welded to the hole of the lower communication tank 8. A straight pipe section 15a, which is the other end of the A connecting member or the B connecting member, having a male thread section 18 formed at one end to screw into the male thread section 17 of the C connecting member, is fixed to the lower mounting section 6 of the cylindrical diaphragm electrode 1. When the A connecting member is fixed, the lower communication tank 8 and the cylindrical diaphragm electrode 1 are connected watertight and detachably by interposing a first packing 14 between the A connecting member and the C connecting member and tightening a union nut 13. When the B connecting member is fixed, a packing 2 is interposed between the B connecting member and the C connecting member and tightening a union nut 13 of the B connecting member, thereby connecting the lower communication tank 8 and the lower part of the cylindrical diaphragm electrode 1 watertight and detachably.

[0049] In Fig. 9(c), an end of the C connecting member is welded to the hole of the upper communicating tank 7. A straight tube portion 15a of the A connecting member or B connecting member, which comprises a union nut 13 having a male thread portion 18 formed at one end thereof that screws with a male thread portion 17 of the C connecting member, is fixed to the upper mounting portion 5 of the cylindrical diaphragm electrode 1. In the case of the A connecting member, a first packing 14 is interposed between the A connecting member and the C connecting member, and in the case of the B connecting member, a second packing 14-1 is interposed between the B connecting member and the C connecting member, and the union nut 13 is fastened to connect the upper communicating tank 7 and the upper portion of the cylindrical diaphragm electrode 1 in a watertight and detachable manner.

[0050] The straight pipe portion 15a of the A connecting member is welded to the hole of the lower communication tank 8. One end of the C connecting member is formed with a male thread portion 17 that screws into the male thread portion 18 of the A connecting member, and the other end of the C connecting member is fixed to the lower mounting portion 6 of the cylindrical diaphragm electrode 1. A first packing is interposed between the A connecting member and the C connecting member, and the union nut 13 is tightened, thereby connecting the lower communication tank 8 and the lower part of the cylindrical diaphragm electrode 1 in a watertight and detachable manner.

[0051] In Fig. 9(d), an end of the C connecting member is welded to a hole in the upper communicating tank 7. A straight tube portion 15a of the A connecting member or B connecting member, which has a union nut 13 at one end having a male thread portion 18 formed thereon that screws with a male thread portion 17 of the C connecting member, is fixed to the upper mounting portion 5 of the cylindrical diaphragm electrode 1. In the case of the A connecting member, a first packing 14 is interposed between the A connecting member and the C connecting member, and in the case of the B connecting member, a second packing 14-1 is interposed between the B connecting member and the C connecting member, and the union nut 13 is fastened to connect the upper communicating tank 7 and the upper portion of the cylindrical diaphragm electrode 1 in a watertight and detachable manner.

[0052] A straight pipe portion 15a of the B connecting member is welded to the hole of the lower communication tank 8. One end of a C connecting member, which has an external thread portion 17 formed at one end to screw into an external thread portion 18 of the A connecting member, is fixed to the lower mounting portion 6 of the cylindrical diaphragm electrode 1. A second packing 14-1 is interposed between the B connecting member and the C connecting member, and a union nut 13 is fastened, thereby forming a watertight and detachable connection between the lower communication tank 8 and the lower portion of the cylindrical diaphragm electrode 1.

[0053] In addition to the combination of the A connecting member, B connecting member, and C connecting member with the first packing 14 and the second packing 14-1 shown in Fig. 9, there are a total of 16 combinations for watertightly and detachably connecting the cylindrical diaphragm electrode 1 to the upper communicating tank 7 and the lower communicating tank 8. Any combination can connect the upper and lower communicating tanks and the cylindrical diaphragm electrode watertightly and detachably, but when the upper communicating tank 7 and the upper part of the cylindrical diaphragm electrode 1 are connected with the A connecting member and the C connecting member, it is preferable to connect the lower communicating tank 8 and the lower part of the cylindrical diaphragm electrode 1 with the B connecting member and the C connecting member. This is because the cylindrical diaphragm electrode can be smoothly attached and detached by connecting the upper part with the A connecting member and the C connecting member and fixing the upper part, and using the flexible B connecting member for the lower part.

[0054] 10 is a comparison diagram of the packaging area during transportation between the cylindrical parallel electrode of the present invention and a conventional cylindrical parallel electrode. The packaging area of ​​a conventional four-row cylindrical parallel electrode, including the moist packaging to prevent the membrane from drying out, is about 1.1 square meters.

[0055] In contrast, the moisturizing packing area of ​​the detachable cylindrical parallel electrodes of the cylindrical diaphragm electrode according to the present invention is about 0.48 square meters, which is about half the moisturizing packing area compared to the prior art. As a result, when the cylindrical parallel electrodes are transported from an electrode manufacturing factory to a remote electrolytic plating factory, the cylindrical diaphragm electrodes can be bundled and packed, and the cylindrical diaphragm electrodes and the upper and lower communicating tanks can be transported separately, and assembly can be performed at the plating factory, which allows a significant reduction in packaging and transportation costs. [Brief description of the drawings]

[0056] [Figure 1] FIG. 1 is a schematic cross-sectional view showing the structure of a prior art membrane electrode. [Diagram 2] FIG. 1 is a schematic cross-sectional view showing a mounting structure of a cylindrical diaphragm electrode in the prior art. [Diagram 3] FIG. 1 is a diagram for explaining the structure of a commonly used union joint. [Figure 4] FIG. 2 is a schematic cross-sectional view showing the structure of a connecting portion that connects a cylindrical diaphragm electrode and an upper communication tank with a union joint in the first embodiment of the present invention. [Diagram 5] FIG. 2 is a diagram showing the structure of a cylindrical diaphragm electrode in a first embodiment of the present invention. [Figure 6] FIG. 2 is a diagram showing a state in which a cylindrical diaphragm electrode is connected to an upper and lower communicating tank in the first embodiment of the present invention. [Figure 7] FIG. 11 is a schematic cross-sectional view showing the structure of a connecting portion that connects a cylindrical diaphragm electrode and an upper communication tank with a union joint in a second embodiment of the present invention. [Figure 8] FIG. 11 is a view showing a state in which a cylindrical diaphragm electrode is connected to an upper and lower communicating tank in a second embodiment of the present invention. [Figure 9] 10A and 10B are diagrams showing an example of a combination of connecting members shown in the first and second embodiments of the present invention. [Figure 10] FIG. 11 is a comparison diagram of packaging area during transportation between the cylindrical parallel electrode of the present invention and a conventional cylindrical parallel electrode. [Explanation of symbols]

[0057] 1: cylindrical diaphragm electrode, 2: electrode body, 2-1: core material, 3: ion exchange membrane, 4: protective membrane, 5: upper mounting part, 6: lower mounting part, 7: upper communication tank, 8: lower communication tank, 9: power supply terminal, 10: flange, 11: flanged union pipe, 11-1: flangeless union pipe, 12: union screw (C connecting member), 13: union nut, 14: first packing, 14-1: second packing, 15a, 15b: straight pipe section, 16: flange-shaped protrusion, 17: male thread section, 18: female thread section, 19: shoulder section, 20: body section, 21: upper communication tank bottom plate, 22: lower communication tank top plate

Claims

1. In a cylindrical parallel electrode system, a plurality of cylindrical diaphragm electrodes are watertightly and detachably connected to an upper communicating tank and a lower communicating tank through which an electrode liquid flows, A connecting member A includes a flanged union pipe that is a straight pipe with a flange at one end, and a union nut that is slidably attached to the outer periphery of the flanged union pipe and has a female thread formed on the inside; A B connecting member including a straight flangeless union pipe and a union nut slidably attached to the outer periphery of the flangeless union pipe and having a female thread formed on the inside; A C-shaped connecting member having a male screw formed on the outer periphery of one end thereof, the male screw engaging with the female screw; A first packing interposed between the A connecting member and the C connecting member; and a second packing attached to a desired position of the flangeless union pipe, the other end of the A connecting member or the other end of the B connecting member is welded to a hole portion of the upper communication tank and a hole portion of the lower communication tank, The other ends of the C-shaped connecting members are fixed to both ends of the cylindrical diaphragm electrode, 4. The cylindrical parallel electrodes, wherein the cylindrical diaphragm electrode is configured to be detachable by rotating the union nut.

2. In a cylindrical parallel electrode system, a plurality of cylindrical diaphragm electrodes are watertightly and detachably connected to an upper communicating tank and a lower communicating tank through which an electrode liquid flows, A connecting member A includes a flanged union pipe that is a straight pipe with a flange at one end, and a union nut that is slidably attached to the outer periphery of the flanged union pipe and has a female thread formed on the inside; A B connecting member including a straight flangeless union pipe and a union nut slidably attached to the outer periphery of the flangeless union pipe and having a female thread formed on the inside; A C-shaped connecting member having a male screw formed on the outer periphery of one end thereof, the male screw engaging with the female screw; A first packing is interposed between the A connecting member and the C connecting member; and a second packing attached to a desired position of the flangeless union pipe. the other end of the A connecting member or the other end of the B connecting member is fixed to both ends of the cylindrical diaphragm electrode, the other end of the C-shaped connecting member is welded to the hole of the upper communication tank and the hole of the lower communication tank, The cylindrical parallel electrode is configured so that the cylindrical diaphragm electrode can be attached and detached by turning the union nut.

3. In a cylindrical parallel electrode system, a plurality of cylindrical diaphragm electrodes are watertightly and detachably connected to an upper communicating tank and a lower communicating tank through which an electrode liquid flows, A connecting member A includes a flanged union pipe that is a straight pipe with a flange at one end, and a union nut that is slidably attached to the outer periphery of the flanged union pipe and has a female thread formed on the inside; A B connecting member including a straight flangeless union pipe and a union nut slidably attached to the outer periphery of the flangeless union pipe and having a female thread formed on the inside; A C-shaped connecting member having a male screw formed on the outer periphery of one end thereof, the male screw engaging with the female screw; A first packing is interposed between the A connecting member and the C connecting member; and a second packing attached to a desired position of the flangeless union pipe. the other end of the A connecting member or the other end of the B connecting member is welded to a hole of the upper communication tank, and the other end of the C connecting member is welded to a hole of the lower communication tank, the other end of the C connecting member is fixed to the upper end of the cylindrical diaphragm electrode, and the other end of the A connecting member or the other end of the B connecting member is fixed to the lower end of the cylindrical diaphragm electrode; 4. The cylindrical parallel electrodes, wherein the cylindrical diaphragm electrode is configured to be detachable by rotating the union nut.

4. In a cylindrical parallel electrode system, a plurality of cylindrical diaphragm electrodes are watertightly and detachably connected to an upper communicating tank and a lower communicating tank through which an electrode liquid flows, A connecting member A includes a flanged union pipe that is a straight pipe with a flange at one end, and a union nut that is slidably attached to the outer periphery of the flanged union pipe and has a female thread formed on the inside; A B connecting member including a straight flangeless union pipe and a union nut slidably attached to the outer periphery of the flangeless union pipe and having a female thread formed on the inside; A C-shaped connecting member having a male screw formed on the outer periphery of one end thereof, the male screw engaging with the female screw; A first packing is interposed between the A connecting member and the C connecting member; and a second packing attached to a desired position of the flangeless union pipe. the other end of the C connecting member is welded to the hole of the upper communication tank, and the other end of the A connecting member or the other end of the B connecting member is welded to the hole of the lower communication tank, The other end of the A connecting member or the other end of the B connecting member is fixed to the upper end of the cylindrical diaphragm electrode, and the other end of the C connecting member is fixed to the lower end of the cylindrical diaphragm electrode, 4. The cylindrical parallel electrodes, wherein the cylindrical diaphragm electrode is configured to be detachable by rotating the union nut.

5. a plurality of cylindrical parallel electrodes according to claim 1 or 2 arranged in an electrolytic cell; and an electrode solution circulating means for circulating the electrode solution from the upper communicating tank to the lower communicating tank; A power supply means for supplying electrolysis power to each of the cylindrical parallel electrodes. An electrolytic plating apparatus comprising:

6. a plurality of cylindrical parallel electrodes according to claim 3 or 4 arranged in an electrolytic cell; and an electrode solution circulating means for circulating the electrode solution from the upper communicating tank to the lower communicating tank; A power supply means for supplying electrolysis power to each of the cylindrical parallel electrodes. An electrolytic plating apparatus comprising:

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