JP7389623B2 - Electrode mounting structure and rotation member - Google Patents

Description

The present invention relates to an electrode mounting structure, a rotation member, and a rotation mechanism used when attaching a cathodic protection electrode to another member.

Conventionally, in seawater utilization equipment such as heat exchangers and condensers that use seawater as cooling water, cathodic protection methods have been used to prevent corrosion of metals by seawater. As cathodic protection methods, a galvanic anode method and an external power supply method are known. The galvanic anode method is, for example, a cathodic protection method in which a galvanic anode is installed in the seawater inlet water chamber of seawater utilization equipment, and corrosion is prevented by the sacrificial action of the galvanic anode. On the other hand, in the external power supply method, as described in Patent Document 1, for example, a soluble electrode such as an iron electrode or an insoluble electrode such as platinum titanium is installed in the seawater inlet water chamber of seawater utilization equipment, and a direct current is applied to the electrode. This is an electrolytic protection method that prevents corrosion by supplying

FIG. 9 shows an example of a conventional cathodic protection structure using an external power supply system. The cathodic protection structure 50 shown in FIG. 9 is used for cathodic protection of seawater utilization equipment 60 such as heat exchangers and condensers, and includes a soluble or insoluble cathode protection electrode 51 serving as an anode, and a cathode. An auxiliary cathode 52 separate from the seawater utilization equipment 60 which is the object to be protected against corrosion, an insulating plate 53 interposed between the two electrodes 51 and 52, a reference electrode 54 for detecting the potential of the object to be protected against corrosion, and an external power source. The device 55 is configured to include a device 55. The seawater utilization facility 60 includes a cooling pipe 61, a tube plate 62, and a water chamber 63 containing these. The electrolytic protection electrode 51 is installed inside the water chamber 63. The external power supply device 55 is installed outside the water chamber 63 and is electrically connected to each electrode (cathode protection electrode 51, auxiliary cathode 52, reference electrode 54) of the cathodic protection structure 50 and the seawater utilization equipment 60. It serves as a power supply and also functions as a constant current constant potential power supply device that controls the potential of the seawater utilization equipment 60 and the sum of the anticorrosion current and the auxiliary current to a constant value. In cathodic protection by the cathodic protection structure 50 having such a configuration, iron ions generated from the cathode protection electrode (anode) 51 form a corrosion-resistant iron oxide film on the inner surface of the cooling pipe 61, and the cathode protection by the external power supply method is performed. Excellent corrosion prevention effects can be obtained by combining corrosion protection using iron ions and cathodic protection using an external power source.

Utility Model Publication No. 63-154668

In a conventional cathodic protection structure 50 shown in FIG. 9, a cathodic protection electrode 51 is detachably attached to a wall material 64 constituting a water chamber 63 by an electrode attachment structure 1Z. As shown in FIG. 10, the electrode mounting structure 1Z includes a screw member 2 having a male threaded portion 20 formed on its peripheral surface, a support member 3 having a through hole 30 into which the screw member 2 is inserted, and the screw member 2. 2, and fixing members 4 and 8 inserted thereinto. The support member 3 is fixed to a non-mounting surface 64b of the wall material 64, which is located on the opposite side of the mounting surface 64a of the electrode 51, with the screw member 2 inserted into the through hole 30.

The screw member 2 is inserted through the through hole 30 of the support member 3 and extends outward from both the mounting surface 64a and the non-mounting surface 64b of the wall material 64. The part extending from the mounting surface 64a of the screw member 2 is the first part 2A that is screwed into the female screw hole 510 of the electrode 51, and the part extending from the non-mounting surface 64b of the screw member 2 is the first part 2A that is screwed into the female screw hole 510 of the electrode 51. This is a second portion 2B through which the member 4 is inserted. That is, the screw member 2 has a first portion 2A through which the electrode 51 is inserted on one side in the axial direction (direction indicated by the symbol X in the figure) of the screw member 2, and a fixing member 4 on the other side. It has a second portion 2B that is inserted.

The support member 3 has a flange portion 3F with a part of the outer surface protruding in a direction perpendicular to the axial direction It is fixed with bolts 35. A through hole 66 that penetrates the wall material 64 in the thickness direction is formed in a portion of the wall material 64 surrounded by the flange seat 65. The first portion 2A of the screw member 2, which is inserted into the hole 66, further extends outward from the mounting surface 64a, and is located on the tip side of the extending portion, is screwed into the female screw hole 510 of the electrode 51. There is. A flange 6 protruding in a direction perpendicular to the axial direction X is provided near the non-mounting surface 64b of the first portion 2A. is in contact with.

The support member 3 is insulated from the screw member 2. This is because if the support member 3 is electrically connected to the screw member 2 without being insulated, a predetermined anticorrosion effect cannot be obtained. Specifically, the portion of the support member 3 that comes into contact with the screw member 2, for example, the inner wall surface defining the through hole 30, is coated with a non-conductive material (not shown) such as resin. Further, the support member 3 has a recess 330 capable of accommodating at least a portion of the fixing member 4 inserted into the second portion 2B of the screw member 2. A filler 7 made of raw material is filled.

When attaching the cathodic protection electrode 51 to the wall material 64 using the electrode attachment structure 1Z, first, the support member 3 is attached to the non-attachment surface 64b of the wall material 64 using the bolt 35, and the through hole 30 of the support member 3 is attached. The screw member 2 is fixed to the support member 3 by passing the fixing member 4 through the second portion 2B of the screw member 2 through which it is inserted. Thereafter, the filler 7 is filled into the recess 330 of the support member 3 and solidified. When the support member 3 is thus fixed to the non-mounting surface 64b of the wall material 64, the first portion 2A extends from the mounting surface 64a on the opposite side to the non-mounting surface 64b. Next, the first portion 2A is inserted into the female screw hole 510 of the electrode 51, and the electrode 51 is rotated around the first portion 2A, and this rotation operation is continued until the electrode 51 comes into contact with the collar portion 6. In this way, after the male threaded portion 20 of the first portion 2A is screwed into the female threaded hole 510 of the electrode 51, the fixing member 8 is passed through the tip of the first portion 2A and tightened.

In the embodiment shown in FIG. 10, a nut 41 and a washer 42 are used as the fixing member 4 on the non-attachment surface 64b side, that is, the fixing member 4 inserted into the second portion 2B of the screw member 2. In the form shown in FIG. 10, two nuts 41 are inserted and screwed into the second portion 2B, and one washer 42 is interposed between these two nuts 41 and the support member 3. There is. Moreover, in the form shown in FIG. 10, a nut 81 and a washer 82 are used as the fixing member 8 on the mounting surface 64a side, that is, the fixing member 8 inserted into the first portion 2A of the screw member 2. In the form shown in FIG. 10, one nut 81 is inserted and screwed into the first portion 2A, and one washer 82 is interposed between this one nut 81 and the insulating plate 53. There is.

In the above-described installation work of the electrolytic protection electrode 51, the electrode 51 came into contact with the flange 6 in the process of rotating the electrode 51 around the first portion 2A of the screw member 2 and moving it toward the flange 6. The problem is that the nut 41 that tightens the second portion 2B of the screw member 2 loosens due to the impact caused by the collision, and as a result, the screw member 2 rotates around the axis, making it difficult to attach the electrode 51. It turns out that this can occur. Further, when the nut 41 is loosened and rotated in this manner, the filler 7 filled around the nut 41 may be damaged, and as a result, the anticorrosive effect may be reduced.

An object of the present invention is to provide a technique that can eliminate the drawbacks of the prior art described above. Specifically, it is an object of the present invention to provide a technique that can reliably attach cathodic protection electrodes to other members. be.

The present invention provides an electrode mounting structure for attaching a cathodic protection electrode having a female threaded hole to another member in a detachable manner, the electrode mounting structure comprising: a screw member, and a through hole into which the screw member is inserted, and with the screw member inserted into the through hole, the other member has a surface opposite to the mounting surface of the cathodic protection electrode. A support member fixed to a non-mounting surface located thereon, and a fixing member inserted and screwed into the screw member, the screw member being inserted through the through-hole of the support member and connected to the mounting surface and the fixing member. The screw member extends outward from both of the non-mounting surfaces, and the extending portion of the screw member from the mounting surface is a first portion that is screwed into the female screw hole of the cathodic protection electrode. , an extending portion of the screw member from the non-attachment surface is a second portion through which the fixing member is inserted; The fixing member is provided with an annular rotation prevention member that prevents the fixing member from rotating, and the rotation prevention member has an insulating property with respect to the screw member and the support member, and has an outer contour and an inner side than the outer contour. The electrode mounting structure has an inner contour that is positioned and defines an insertion hole for the screw member, and the inner contour has a non-circular shape in plan view.

The present invention also provides an electrode mounting structure for detachably attaching a cathodic protection electrode having a female threaded hole to another member, the electrode mounting structure having a male threaded portion on the circumference that can be screwed into the female threaded hole. and a through hole into which the screw member is inserted, and in a state where the screw member is inserted into the through hole, the side opposite to the mounting surface of the cathodic protection electrode on the other member. a support member fixed to a non-mounting surface located on the mounting surface; and a fixing member inserted into and screwed into the screw member, the screw member being inserted through the through-hole of the support member and mounted on the mounting surface. and a first portion extending outward from both of the non-attachment surfaces, the extension portion of the threaded member from the attachment surface being screwed into the female screw hole of the cathodic protection electrode; The extending portion of the screw member from the non-attachment surface is a second portion through which the fixing member is inserted, and the second portion and the supporting member are further connected to the second portion. The electrode mounting structure includes a rod-shaped locking member that penetrates in a direction perpendicular to the axial direction and stops the screw member and the fixing member from rotating.

Further, the present invention provides a cathodic protection electrode having a female threaded hole, an electrically conductive screw member having a male threaded portion on the circumference that can be screwed into the female threaded hole, and a fixing member screwed into the screw member. An annular locking member that is inserted into the screw member adjacent to the fixing member and used as a rotation stopper for the screw member and the fixing member when attached to another member using the screw member, It is made of an insulating material and has an outer contour and an inner contour located inside the outer contour and defining an insertion hole for the screw member, and the inner contour has a non-circular shape in plan view. , is a rotating member.

Further, the present invention provides a cathodic protection electrode having a female threaded hole, an electrically conductive screw member having a male threaded portion on the circumference that can be screwed into the female threaded hole, and a fixing member screwed into the screw member. A locking mechanism used to prevent the screw member and the fixing member from rotating when the screw member and the fixing member are attached to another member, the locking mechanism having a through hole through which the screw member is inserted, In the state in which the screw member is inserted, a supporting member is fixed to a non-mounting surface of the other member located on the opposite side to the mounting surface of the cathodic protection electrode, and the screw member and the fixing member are rotated. a rod-shaped rotation stopper for stopping, the support member surrounding an extension of the screw member from the non-attachment surface, and a recess capable of accommodating the fixing member inserted into the extension. The locking mechanism is provided with a fixing member accommodating portion that defines a fixing member accommodating portion, and an insertion hole through which the rotation preventing member is inserted is provided in the fixing member accommodating portion and the extension portion.

According to the present invention, an electrode attachment structure, a rotation member, and a rotation mechanism are provided as techniques for reliably attaching a cathodic protection electrode to another member.

FIG. 1 is a diagram showing a state in which an embodiment of the electrode mounting structure of the present invention is used, and is a schematic end view of the embodiment along the axial direction. FIG. 2 is a schematic exploded perspective view of the electrode mounting structure shown in FIG. 1. FIG. 2 is a schematic end view taken along line II in FIG. 1, and is also a plan view of an embodiment of the annular rotation stopper member. FIG. 4 is a diagram showing a usage state of another embodiment of the electrode mounting structure of the present invention, and is a schematic end view (corresponding to FIG. 1) of the embodiment along the axial direction. FIG. 5 is a schematic end view taken along line II in FIG. 4, and is also a plan view (corresponding to FIG. 3) of another embodiment of the annular rotation stopper. FIG. 6 is a diagram showing a state in which still another embodiment of the electrode mounting structure of the present invention is used, and is a schematic end view (corresponding to FIG. 1) of the embodiment along the axial direction. FIG. 7 is a schematic end view taken along line II in FIG. 6, and is also a plan view (corresponding to FIG. 3) of still another embodiment of the annular rotation stopper. FIG. 8 is a schematic exploded perspective view (corresponding to FIG. 2) of still another embodiment of the electrode mounting structure of the present invention. FIG. 9 is a schematic configuration diagram of an example of a conventional cathodic protection structure. FIG. 10 is a schematic end view along the axial direction of the cathodic protection electrode and electrode mounting structure in the cathode protection structure shown in FIG. 9.

Hereinafter, the present invention will be explained based on preferred embodiments thereof with reference to the drawings. In addition, in the description of the following drawings, the same or similar parts are given the same or similar symbols. The drawings are basically schematic, and the ratio of each dimension may differ from the actual one.

1 to 3 show an electrode mounting structure 1A which is a first embodiment of the electrode mounting structure of the present invention. The electrode mounting structure 1A is used to detachably attach a cathodic protection electrode to another member in cathodic protection of seawater utilization equipment such as a heat exchanger and a condenser. The electrode mounting structure 1A can constitute the cathodic protection structure 50 (see FIG. 9) used for cathodic protection of the seawater utilization equipment 60 described above, and can be used in place of the electrode mounting structure 1Z (see FIG. 10). It is something. In the following, regarding the electrode mounting structure 1A, a structure different from the electrode mounting structure 1Z will be mainly explained, and a structure similar to the form described in FIGS. 9 and 10 described above (a structure to which the description of the form can be applied as appropriate) are given the same reference numerals as those in the form, and the explanation will be simplified or omitted.

As shown in FIGS. 1 and 2, the electrode mounting structure 1A attaches the cathodic protection electrode 51 having the female screw hole 510 to "another member", specifically, the water chamber 63 of the seawater utilization equipment 60 (see FIG. 9). This is for detachably attaching it to one surface (attachment surface 64a) of the wall material 64 constituting the wall material 64 (see ). The electrode 51 is a soluble electrode such as an iron electrode or an insoluble electrode such as platinum titanium. In the first embodiment, the insulating plate 53 is attached to the end surface of the electrode 51 located on the opposite side to the end surface facing the mounting surface 64a of the wall material 64. Further, the wall material 64 is coated with a resin material or a rubber material having electrical insulation properties on the mounting surface 64a, the inner wall surface of the through hole 66, and the non-mounting surface 64b.

In the first embodiment, the electrode 51 is divided into a plurality of (specifically two) small electrodes 51P in the axial direction X of the screw member 2, and the plurality of small electrodes 51P are connected to each other in the axial direction X. has been configured. Each of the plurality of small electrodes 51P has a female screw hole 510, as shown in FIG. The screw member 2 is inserted and screwed together.

The electrode mounting structure 1A includes a conductive screw member 2 having a male screw portion 20 on its circumference that can be screwed into a female screw hole 510 of an electrode 51, and a through hole 30 into which the screw member 2 is inserted. With the screw member 2 inserted into the through hole 30, the supporting member 3 is fixed to a non-mounting surface 64b of the wall material 64 (another member) located on the opposite side to the mounting surface 64a of the electrode 51. , and fixing members 4 and 8 that are inserted into and screwed into the screw member 2.

The screw member 2 is inserted through the through hole 30 of the support member 3 and extends outward from both the mounting surface 64a and the non-mounting surface 64b of the wall material 64. The protruding portion is a first portion 2A that is screwed into the female screw hole 510 of the electrode 51, and the extending portion from the non-mounting surface 64b of the screw member 2 is a second portion through which the fixing member 4 is inserted. It is said to be part 2B. Further, the screw member 2 is located between the first portion 2A and the second portion 2B, inside the through hole 66 of the wall material 64 during use, and extends outward from the mounting surface 64a and the non-mounting surface 64b. It has a non-extending portion 2C that does not extend.

In the first embodiment, the threaded member 2 partially has a male threaded portion 20 on the circumferential surface of the threaded member 2 . Specifically, as shown in FIG. 2, the male threaded portion 20 is formed on the circumferential surface of the first portion 2A and the second portion 2B on the distal end side in the axial direction X of the threaded member 2, It is not formed on the other end sides of both portions 2A, 2B in the axial direction X and on the circumferential surface of the non-extending portion 2C. The portion of the screw member 2 in which the male threaded portion 20 is not formed includes a portion of the screw member 2 corresponding to the through hole 30 of the support member 3 (a portion accommodated in the through hole 30 during use), and a portion of the screw member 2 that will be described later. This is a portion 21 corresponding to the rotation stop member 10A (a portion surrounded by the rotation stop member 10A during use).

The material of the screw member 2 may be any material as long as it is conductive and has sufficient strength for practical use. For example, metals such as steel, stainless steel, copper alloy, titanium, and titanium alloy can be used.

In the first embodiment, the support member 3 includes a cylindrical screw member holding part 31 that defines the through hole 30, a fixing part 32 fixed to the non-mounting surface 64b of the wall material 64 with a bolt 35, and a screw member 2, and a second part corresponding part 33 defining a recess 330 that can accommodate the rotation stopper 10A inserted into the second part 2B. The fixing part 32 has a flat plate shape, more specifically, a disk shape, and a screw member holding part 31 extends perpendicularly to the fixing part 32 from one side of the fixing part 32, and A second partial corresponding portion 33 extends perpendicularly to the fixed portion 32 from the surface thereof. The fixing part 32 has a longer diameter (cross length) than the screw member holding part 31 and has a flange part 3F that protrudes outward from the circumferential surface of the screw member holding part 31. That is, a plurality (specifically, four) of bolt insertion holes 320 into which the bolts 35 are inserted and screwed are bored in the peripheral edge of the fixed portion 32.

The material of the support member 3 may be any material as long as it has sufficient strength for practical use, and may be, for example, metal or plastic, regardless of whether it is electrically conductive or not. As the material of the support member 3, metal is typically used like the screw member 2.

In the first embodiment, the support member 3 (the screw member holding part 31, the fixing part 32, and the second corresponding part 33) is made of metal and has conductivity, but is insulated from the screw member 2. ing. Specifically, the support member 3 can come into contact with the circumferential surface of the screw member 2 on the inner wall surface of the screw member holding portion 31 that defines the through hole 30, and the inner wall surface is made of a non-conductive material such as resin. The insulating sleeve 36 is in contact with the screw member 2 at the through hole 30. Further, the outer wall surface of the screw member holding portion 31 is also covered with the insulating sleeve 36, and is insulated from the seawater in the water chamber 63 and the inner wall surface of the through hole 66.

In the first embodiment, the electrode mounting structure 1A includes a fixing member (fixing member disposed on the mounting surface 64a side) 8 inserted into the first portion 2A of the screw member 2, and a second portion of the screw member 2. 2B (fixing member disposed on the non-attachment surface 64b side) 4. The fixing member 8 inserted into the first portion 2A includes two nuts 81. The fixing member 4 inserted into the second portion 2B includes two nuts 41 and one washer 42.

In the first embodiment, the electrode mounting structure 1A includes a flange 6 that is interposed between the support member 3 and the electrode 51 during use. The collar part 6 has an annular shape as shown in FIG. 2, and in use, as shown in FIG. 51 (small electrode 51P).

The electrode mounting structure 1A includes an annular rotation preventing member 10A that is inserted into the second portion 2B of the screw member 2 together with the fixing member 4 (nut 41, washer 42) and prevents the screw member 2 and the fixing member 4 from rotating. Be equipped. This rotation preventing member 10A has a characteristic configuration that the conventional electrode mounting structure 1Z (see FIG. 10) does not have.

The rotation member 10A has insulation properties with respect to the screw member 2 and the support member 3. If the rotation member 10A is electrically connected to both members 2 and 3 without being insulated, there is a possibility that a predetermined anticorrosion effect may not be obtained. The material for the rotation member 10A may be any material that does not have electrical conductivity, such as fiber reinforced plastic (FRP), vinyl chloride resin, polyethylene, polypropylene, polystyrene, acrylic resin, ABS resin, polycarbonate, etc. One type of these can be used alone or two or more types can be used in combination.

Among the materials for the locking member 10A described above, FRP has particularly excellent strength and is therefore useful as a material for the locking member 10A. That is, the rotation stopper 10A is preferably configured to include FRP, and more preferably configured to include FRP. As the FRP, any known material can be used without particular limitation. Particularly preferable FRPs include glass fiber reinforced plastic (GFRP) and aramid fiber reinforced plastic (AFRP).

As shown in FIG. 3, the locking member 10A has an outer contour 11 and an inner contour 12 located inside the outer contour 11 and defining an insertion hole for the screw member 2 (second portion 2B). However, the inner contour 12 is characterized by a non-circular shape in plan view. The fact that the inner contour 12 of the rotation stopper 10A has a non-circular shape in plan view means that the insertion hole of the second portion 2B has a non-circular shape in plan view. In the first embodiment, the inner contour 12 (insertion hole of the second portion 2B) of the rotation preventing member 10A has a rectangular shape, more specifically, a square shape in plan view.

As described above, the rotation member 10A includes a cathodic protection electrode 51 having a female threaded hole 510, a conductive screw member 2 having a male threaded portion 20 on its circumference that can be screwed into the female threaded hole 510, When attaching the fixing member 4 (nut 41, washer 42) screwed to the screw member 2 to the wall material 64 (another member), the screw member 2 should be adjacent to the fixing member 4. This is an annular locking member that is inserted through the screw member 2 and the fixing member 4 and used as a rotation stopper. The main features of the locking member 10A are 1) being made of an insulating material, and 2) an outer contour 11 and a screw member 2 (second portion 2B) located inside the outer contour 11 through which the screw member 2 (second portion 2B) is inserted. The inner contour 12 defines a hole, and the inner contour 12 has a non-circular shape in plan view.

In the first embodiment, the locking member 10A is arranged at a position closer to the electrode 51 than the fixing member 4 (nut 41, washer 42) in the axial direction X of the screw member 2. More specifically, as shown in FIG. 1, the rotation stopper 10A has an insertion hole of the screw member 2 (second portion 2B) in the rotation stopper 10A connected to the through hole 30 of the support member 3. It is arranged so that

The work of attaching the electrode 51 to the wall material 64 (another member) using the electrode attachment structure 1A is basically the same as the attachment work when using the conventional electrode attachment structure 1Z described above. That is, first, the support member 3 is attached to the non-attachment surface 64b of the wall material 64 using the bolt 35, and the rotation member 10A and the fixing member are attached to the second portion 2B of the screw member 2 inserted through the support member 3. 4, the screw member 2 is fixed to the support member 3 by sequentially passing the washer 42 and nut 41 and tightening the nut 41. When the support member 3 is thus fixed to the non-mounting surface 64b of the wall material 64, the first portion 2A extends from the mounting surface 64a. Next, the collar part 6 is passed through the first part 2A, and the collar part 6 is arranged so as to be in contact with the support member 3 (screw member holding part 31), and then the electrode 51 and The insulating plates 53 are sequentially passed through. In the first embodiment, the first portion 2A is sequentially passed through the female screw hole 510 of each of the plurality of (two in the illustrated form) small electrodes 51P that constitute the electrode 51. This rotation operation is continued until the small electrode 51P comes into contact with the flange 6. In this way, the female threaded hole 510 of the electrode 51 (connection body of the small electrode 51P) is screwed into the male threaded part 20 of the first part 2A, and after passing the insulating plate 53 through, the tip of the first part 2A is A nut 81 as a fixing member 8 is passed through the section and tightened. Then, the screw member 2 and the external power supply device 55 (see FIG. 9) are electrically connected via the lead wire. Specifically, as shown in FIG. 2, a lead connecting the external power supply device 55 and the screw member 2 is provided at the tip of the second portion 2B of the screw member 2 (at a position further outward in the axial direction X than the nut 41). Connect the crimp terminal 15 to which the wire is connected. The crimp terminal 15 is interposed between a screw 16 and a washer 17, and the screw 16 is screwed into a female screw hole bored in the second portion 2B.

As mentioned above, in the work of attaching the electrode 51 to the wall material 64 (another member) using the conventional electrode attachment structure 1Z, the electrode 51 is rotated around the first portion 2A while facing toward the flange 6. In the moving process, the impact when the electrode 51 comes into contact with the flange 6 loosens the fastening member 4 tightening the second portion 2B, especially the nut 41, and as a result, the screw member 2 loosens. There was a problem in that the electrodes 51 were difficult to attach due to rotation. On the other hand, when the electrode mounting structure 1A is used, the inner contour 12 of the locking member 10A inserted into the second portion 2B together with the fixing member 4 has a non-circular shape (quadrangular shape), in other words. Then, since the insertion hole of the second portion 2B has a non-circular shape (quadrangular shape) in plan view, the inner contour 12 (the insertion hole of the second portion 2B) has a circular shape in plan view. Since the screw member 2 is more easily engaged with the rotation stopper 10A than in the case of FIG. . Moreover, since the rotation stopper 10A has insulation properties with respect to the screw member 2 and the support member 3, there is no possibility that the predetermined corrosion prevention effect of the electrolytic protection structure 50 will be inhibited by the rotation stopper 10A.

Further, in the first embodiment, the locking member 10A is disposed at a position closer to the electrode 51 than the fixing member 4 (nut 41, washer 42) in the axial direction Since the rotation stopper 10A is interposed between the two, the rotation stopper 10A can receive the impact when the electrode 51 (small electrode 51P) comes into contact with the flange 6 during the electrode 51 installation work. It is possible to effectively prevent the inconvenience that the tightening of the fixing member 4 including the nut 41 loosens due to impact. In particular, when the rotation stopper 10A is made of FRP, it has excellent resistance to this impact, so the above-mentioned effect of the rotation stopper 10A (especially the effect of preventing the fixed member 4 from rotating along with it) is even more reliable. can be played.

In the first embodiment, as shown in FIG. 3, in the rotation stopper 10A, not only the shape of the inner contour 12 in plan view but also the shape of the outer contour 11 in plan view is non-circular. The shape of the contour 11 in plan view is a quadrilateral shape (square shape) like the shape of the inner contour 12 in plan view. That is, in the rotation stopper 10A, the shape of the inner contour 12 and the shape of the outer contour 11 in plan view are similar. With such a configuration, the effects of the above-mentioned rotation preventing member 10A (particularly the effect of preventing the fixing member 4 from rotating together) can be more reliably achieved.

Further, in the first embodiment, as shown in FIG. 3, the portion 21 of the second portion 2B of the screw member 2 corresponding to the locking member 10A has a cross-sectional shape in a direction perpendicular to the axial direction It has the same shape as No. 12 in plan view, that is, a quadrilateral shape (square shape). With such a configuration, the effect of preventing the screw member 2 and the fixing member 4 from rotating together by the above-mentioned rotation preventing member 10A can be more reliably achieved.

Further, in the first embodiment, as described above, the support member 3 defines a recess 330 that surrounds the second portion 2B of the screw member 2 and can accommodate the locking member 10A inserted through the second portion 2B. The shape of the recess 330 in plan view (the shape of the inner contour of the second partial corresponding portion 33 defining the recess 330 in plan view) is the same as that of the outer contour 11. It has the same shape as the planar view shape, that is, a quadrilateral shape (square shape) (see FIG. 3). With such a configuration, the effect of preventing the screw member 2 and the fixing member 4 from rotating together by the above-mentioned rotation preventing member 10A can be more reliably achieved.

In other words, in the first embodiment, as shown in FIG. shape), and the inner circumferential surface (inner contour 12) of the rotation preventing member 10A is in close contact with the circumferential surface of this non-circular shaped portion 21, and the outer circumferential surface (outer contour 11) of the rotation preventing member 10A, The second partial corresponding portion 33 of the support member 3 is in close contact. With this configuration, the impact force when the electrode 51 (small electrode 51P) comes into contact with the flange part 6 during the electrode 51 installation work is applied to the support member 3 against the wall material 64 via the second partial corresponding part 33. Since the rotation is easily transmitted to the fixed bolt 35, the above-described effect of preventing the screw member 2 and the fixing member 4 from rotating together due to the rotation preventing member 10A can be more reliably achieved.

The dimensions of each part of the rotation stopper 10A are not particularly limited, and can be appropriately set according to the dimensions of each part of the screw member 2, etc. The thickness of the locking member 10A, that is, the length of the locking member 10A in the axial direction It is 8 to 20 mm, more preferably 10 to 15 mm.

Other embodiments of the invention are shown in FIGS. 4-8. Regarding other embodiments to be described later, components different from the electrode mounting structure 1A of the first embodiment described above will be mainly explained, and similar components will be given the same reference numerals and explanations will be omitted. For components that are not particularly explained, the explanation regarding the electrode mounting structure 1A applies as appropriate.

In the electrode mounting structure 1B of FIG. 4 and the second embodiment, as shown in FIG. The planar view shape is also a hexagonal shape, and the planar view shape of the inner contour 12 and the planar view shape of the outer contour 11 are similar. Further, the portion 21 of the second portion 2B corresponding to the rotation stopper 10B has a cross-sectional shape in a direction perpendicular to the axial direction It has a rectangular shape, and the inner circumferential surface (inner contour 12) of the rotation preventing member 10B is in close contact with the circumferential surface of the portion 21.

Further, in the electrode mounting structure 1A, the plan view shape of the recess 330 of the second portion corresponding portion 33 of the support member 3 (the plan view shape of the inner contour of the second portion corresponding portion 33) is the same as the outer contour of the rotation member 10A. The second partial corresponding portion 33 is in close contact with the circumferential surface (outer contour 11) of the rotation preventing member 10A, and the second partial corresponding portion 33 is in close contact with the circumferential surface (outer contour 11) of the rotation preventing member 10A. However, in the electrode mounting structure 1B, as shown in FIG. The shape of the contour in plan view) is different from the shape of the outer contour 11 of the rotation preventing member 10B in plan view, and therefore, the second partial corresponding portion 33 is in close contact with the peripheral surface (outer contour 11) of the rotation prevention member 10B. Instead, an intervening member 9 is interposed between the rotation preventing member 10B and the second partial corresponding portion 33 surrounding the rotation preventing member 10B. The intervening member 9 is joined to the second corresponding portion 33 by welding or welding. The material of the intervening member 9 may be any material as long as it has sufficient strength for practical use, and examples thereof include steel, stainless steel, fiber reinforced plastic (FRP), etc., regardless of whether or not it is electrically conductive.

The electrode mounting structure 1B also provides the same effects as the electrode mounting structure 1A. In particular, in the electrode mounting structure 1B, the action of the rotation preventing member 10B prevents the screw member 2 and the fixing member 4 (nut 41, washer 42) from rotating together during the electrode 51 installation work, so that the filler material 7 is not damaged. This can be prevented and the desired anticorrosion effect can be reliably achieved.

In the electrode mounting structure 1C of the third embodiment shown in FIG. 6, as shown in FIG. The shape in plan view is hexagonal. The gear shape has convex portions 13 and concave portions 14 alternately formed over the entire length in the circumferential direction, and an imaginary line (not shown) connecting the tops of the multiple convex portions 13 and the bottoms of the multiple concave portions 14. It has a shape that forms concentric circles with lines (not shown). Further, the portion 21 of the second portion 2B corresponding to the rotation stopper 10C has a cross-sectional shape in a direction perpendicular to the axial direction The inner circumferential surface (inner contour 12) of the rotation preventing member 10B is in close contact with the circumferential surface of the portion 21. Further, the plan view shape of the recess 330 of the second partial corresponding portion 33 of the support member 3 (the plan view shape of the inner contour of the second partial corresponding portion 33) is the plan view shape of the outer contour 11 of the rotation member 10C. The second partial corresponding portion 33 is in close contact with the peripheral surface (outer contour 11) of the rotation preventing member 10C. The electrode mounting structure 1C also provides the same effects as the electrode mounting structure 1A.

The electrode mounting structure 1D of the fourth embodiment shown in FIG. This structure differs from the electrode mounting structures 1A, 1B, and 1C described above, which each include a ring-shaped rotation prevention member, in that it includes a rod-shaped rotation prevention member 10D that penetrates in a direction perpendicular to X.

In the fourth embodiment, the support member 3 defines a recess 330 that surrounds the second portion 2B and can accommodate the fixing member 4 (nut 41, washer 42) inserted through the second portion 2B. When the second partial corresponding part 33 is provided, as shown in FIG. is provided, and a rotation member insertion hole 22 is provided in the second portion 2B. When the electrode mounting structure 1D is in use, the rotation member 10D is arranged to pass through both the insertion holes 34, 22. The material for the rotation stopper 10D may be any material that does not have electrical conductivity, and typically, plastic such as FRP is used like the rotation stopper 10A.

The electrode mounting structure 1D can achieve the same effect as the electrode mounting structure 1A by providing a rotation mechanism including the rod-shaped rotation prevention member 10D. Specifically, the rotation mechanism includes a cathodic protection electrode 51 having a female threaded hole 510, a conductive screw member 2 having a male threaded portion 20 on its circumference that can be screwed into the female threaded hole 510. , when attaching the screw member 2 and the fixing member 4 (nut 41, washer 42) to the wall material 64 (another member), the screw member 2 and the fixing member 4 are prevented from rotating. It is a rotation mechanism used as a rotation mechanism, and has a through hole 30 into which a screw member 2 is inserted, and when the screw member 2 is inserted into the through hole 30, an electrode on a wall material 64 (another member) is inserted. The support member 3 is fixed to a non-mounting surface 64b located on the opposite side to the mounting surface 64a of 51, and a rod-shaped rotation preventing member 10D that prevents the screw member 2 and the fixing member 4 from rotating. In the rotation mechanism, the support member 3 surrounds the extending portion (second portion 2B in the illustrated form) of the screw member 2 from the non-attachment surface 64b, and the fixing member 4 is inserted into the extending portion. The fixing member accommodating portion (in the illustrated form, the second partial corresponding portion 33) defines a recess 330 that can accommodate the fixing member accommodating portion. In the locking mechanism, insertion holes 34 and 22 through which the locking member 10D is inserted are provided in the fixing member accommodating portion (second portion corresponding portion 33) and the extending portion (second portion 2B). ing.

Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the above embodiments, and the configuration provided in one embodiment may be provided in other embodiments.
For example, in the embodiment, in one electrode mounting structure, only one of the rotation mechanisms including the annular rotation prevention members such as rotation prevention members 10A, 10B, and 10C and the rod-shaped rotation prevention member 10D is adopted. However, both may be used. That is, for example, in the electrode attachment structures 1A, 1B, and 1C, the rotation mechanism provided in the electrode attachment structure 1D (a rotation mechanism including a rod-shaped rotation prevention member 10D and a rotation prevention member insertion hole) may be adopted. In that case, in addition to the second portion 2B of the screw member 2 and the second portion corresponding portion 33 of the support member 3, the annular rotation prevention members 10A, 10B, and 10C are also provided with insertion holes for rotation prevention members. It will be done.
Further, the combination of the outer contour 11 and the inner contour 12 in plan view in the annular rotation stopper member is not limited to the above-mentioned embodiments, and can be arbitrarily combined, for example, the rotation stopper 10A (see FIG. 3). In this case, the shape of the outer contour 11 in plan view may be a hexagonal shape or a gear shape. Further, in the rotation preventing member 10B (see FIG. 5), the outer contour 11 may have a rectangular shape or a gear shape in plan view. Further, in the rotation stopper 10C (see FIG. 7), the outer contour 11 may have a rectangular shape or a gear shape in plan view.
Further, in the embodiment, the electrode 51 for cathodic protection is divided into a plurality of small electrodes in the axial direction of the screw member 2, but it does not need to be divided into a plurality of small electrodes, and the present invention is applicable to various electrodes for cathodic protection. Applicable to electrodes.

1A, 1B, 1C, 1D, 1Z Electrode mounting structure 2 Screw member 20 Male screw part 2A First part 2B Second part 2C Non-extending part 21 Stop member corresponding part 22 Stop member insertion hole 3 Support member 30 Through hole 31 Screw member holding part 32 Fixing part 3F Flange part 320 Bolt insertion hole 33 Second part corresponding part (fixing member accommodating part)
330 recess 34 insertion hole for locking member 35 bolt 36 insulating sleeve 4 fixing member on non-mounting surface side (fixing member through which the second part is inserted)
41 Nut 42 Washer 6 Flange 7 Filler 8 Fixing member on the mounting surface side (fixing member through which the first part is inserted)
81 Nut 82 Washer 9 Intervening member 10A, 10B, 10C, 10D Rotating member 11 Outer contour of the annular rotation preventing member 12 Inner contour of the annular rotation preventing member 13 Convex portion
14 recess 50 cathodic protection structure 51 cathodic protection electrode 510 female screw hole 52 auxiliary cathode 53 insulating plate 54 reference electrode 55 external power supply 60 seawater utilization equipment 61 cooling pipe 62 tube sheet 63 water chamber 64 wall material (cathode protection electrode (Other parts that can be attached)
64a Mounting surface of cathodic protection electrode 64b Non-mounting surface of cathodic protection electrode 65 Flange seat 66 Through hole

Claims (8)

An electrode mounting structure for detachably attaching a cathodic protection electrode having a female threaded hole to another member,
a conductive screw member having a male screw portion on its circumferential surface that can be screwed into the female screw hole;
a non-mounting surface of the other member having a through hole into which the screw member is inserted, and which is located on the opposite side of the mounting surface of the cathodic protection electrode in a state where the screw member is inserted into the through hole; a support member fixed to the
a fixing member that is inserted into and screwed into the screw member ;
comprising a flange interposed between the support member and the cathodic protection electrode ,
The female screw hole passes through the cathodic protection electrode in the axial direction of the screw member,
The screw member is inserted through the through hole of the support member and extends outward from both the mounting surface and the non-mounting surface, and the extending portion of the screw member from the mounting surface is A first part is screwed into the female screw hole of the cathodic protection electrode, and a part extending from the non-mounting surface of the screw member is a second part through which the fixing member is inserted. ,
The flange has an annular shape, and when in use, the first portion is inserted therethrough and comes into contact with both the support member and the cathodic protection electrode,
Further, an annular locking member is inserted into the second portion together with the fixing member to prevent rotation of the screw member and the fixing member,
The rotation preventing member has an insulating property with respect to the screw member and the support member, and has an outer contour and an inner contour located inside the outer contour and defining an insertion hole for the screw member. an electrode mounting structure, wherein the inner contour has a non-circular shape in plan view. The shape of the inner contour in plan view is a quadrangular shape, a hexagonal shape, or a gear shape,
The gear shape has convex portions and concave portions alternately formed over the entire length in the circumferential direction, and a concentric circle is formed by an imaginary line connecting the tops of the plurality of convex portions and an imaginary line connecting the bottoms of the plurality of concave portions. The electrode mounting structure according to claim 1, which has a shape. The shape of the outer contour in plan view is a quadrangular shape, a hexagonal shape, or a gear shape,
The gear shape has convex portions and concave portions alternately formed over the entire length in the circumferential direction, and a concentric circle is formed by an imaginary line connecting the tops of the plurality of convex portions and an imaginary line connecting the bottoms of the plurality of concave portions. The electrode mounting structure according to claim 1 or 2, which has a shape. The electrode mounting structure according to any one of claims 1 to 3, wherein the shape of the inner contour in plan view and the shape of the outer contour in plan view are similar. 1 . The portion of the second portion corresponding to the rotation stopper has a cross-sectional shape in a direction orthogonal to the axial direction of the second portion that is the same shape as the inner contour in plan view. The electrode mounting structure according to any one of items 4 to 4. The electrode mounting structure according to any one of claims 1 to 5, wherein the rotation preventing member includes fiber-reinforced plastic. The support member includes a second part corresponding part that surrounds the second part and defines a recess that can accommodate the rotation stopper inserted into the second part,
The electrode mounting structure according to any one of claims 1 to 6, wherein the shape of the recess in plan view is the same as the shape of the outer contour in plan view. A cathodic protection electrode having a female threaded hole is provided with a conductive screw member having a male screw portion on its circumferential surface that can be screwed into the female screw hole, a fixing member screwed into the screw member, and a support member. , when attaching to another member using the flange interposed between the support member and the cathodic protection electrode , the screw member is inserted into the screw member so as to be adjacent to the fixing member; An annular rotation stopper used as a rotation stopper for the member and the fixed member,
The female screw hole passes through the cathodic protection electrode in the axial direction of the screw member,
The support member has a through hole into which the screw member is inserted, and in a state where the screw member is inserted into the through hole, the support member has a through hole on the opposite side of the other member to the mounting surface of the cathodic protection electrode. Fixed to the non-mounting surface located,
The flange has an annular shape, and when in use, the screw member is inserted therethrough and contacts both the support member and the cathodic protection electrode,
The rotation preventing member is made of an insulating material and has an outer contour and an inner contour located inside the outer contour and defining an insertion hole for the screw member, and the shape of the inner contour in plan view is A rotating member having a non-circular shape.

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