A high current auxiliary anode structure for an external protective cover

Abstract

The invention discloses a high-current auxiliary anode structure with an external protective cover, comprising: two butted anode assemblies, and a protective cover butted to the outside of the anode assemblies; the cable passes through the inside of the two anode assemblies, and the two ends of the anode assemblies and the protective cover are respectively provided with a card slot for accommodating the cable, the butted surface of the anode assembly is provided with at least two anode connection holes, and the non-butted surface is provided with a terminal groove and an injection hole, the core wire inside the cable is crimped in the terminal groove, and the non-butted surface of the protective cover is provided with a plurality of discharge holes. The invention covers the outer surface of the packaging shell with a conductive coating, integrates the packaging shell with the anode tube, and realizes the increase of the current and the strength of the anode body under the condition of maintaining a certain overall size; and injects into the internal cavity of the anode body through the anode injection hole to enhance the water tightness of the anode body and the reliability of the electrical connection.

Description

Technical Field

[0001] The invention relates to the field of marine engineering corrosion protection and monitoring, and in particular to a high-current auxiliary anode structure of an external protective cover. Background Art

[0002] Impressed current cathodic protection is one of the commonly used methods in the field of marine metal structure anti-corrosion technology. The auxiliary anode is the core component of the impressed current cathodic protection system. The working performance of the auxiliary anode is of decisive significance to the working efficiency of the impressed current cathodic protection system. The existing auxiliary anode structure is mostly a thin-walled tubular structure, which has the following problems: First, the thin-walled tubular anode is relatively fragile and not suitable for harsh real sea conditions; second, the outer surface area that determines the anode's ability to release current is limited by the anode body diameter and packaging structure, allowing a relatively small release current; third, the tubular anode is circumferentially closed, and it is impossible to implement high-reliability wiring methods and terminal packaging inside, and it is also inconvenient to disassemble and maintain. Summary of the invention

[0003] The present invention provides a high-current auxiliary anode structure of an external protective cover to overcome the above technical problems.

[0004] A high-current auxiliary anode structure with an external protective cover comprises: two butted anode assemblies and a protective cover butted to the outside of the anode assemblies; a cable passes through the inside of the two anode assemblies, and both ends of the anode assemblies and the protective cover are respectively provided with a card slot for accommodating the cable, the butted surface of the anode assembly is provided with at least two anode connection holes, and the non-butted surface is provided with a terminal groove and an injection hole, the core wire inside the cable is crimped in the terminal groove, and the non-butted surface of the protective cover is provided with a plurality of discharge holes; the outer surface of the anode assembly is covered with a conductive coating.

[0005] Furthermore, a side of the anode assembly having the terminal groove is also provided with a plurality of cable compression ribs; the cable compression ribs are located between the two ends of the anode assembly and the terminal groove; the plurality of cable compression ribs and the terminal groove are located on the same axis of the anode assembly.

[0006] Furthermore, reinforcing ribs are provided on the inner side of the protective cover; the reinforcing ribs are plate-like structures; the reinforcing ribs are staggered in the axial and radial directions of the protective cover.

[0007] Furthermore, a plurality of threaded holes are respectively provided at both ends of the anode assembly and the protective cover, and the anode assembly and the protective cover are fixedly connected by screws.

[0008] Furthermore, the two symmetrically fixedly connected anode assemblies form a cylinder / rectangular parallelepiped, and the corresponding two symmetrically fixedly connected protective covers form a cylinder / rectangular parallelepiped.

[0009] Furthermore, at least three rows of discharge holes are respectively provided on the surface of the protective cover in the axial direction and the radial direction of the protective cover, and each row includes at least three discharge holes.

[0010] Furthermore, the two symmetrical protective covers are fixedly connected by a snap-fit ​​structure.

[0011] Furthermore, the anode assembly and the protective cover are integrally formed by casting, mold injection molding or profile welding.

[0012] Furthermore, the material of the anode assembly is titanium / niobium; the material of the protective cover is titanium plate / polytetrafluoro.

[0013] The present invention adopts the method of adding a protective cover to the outside of the auxiliary anode to prevent the auxiliary anode from being damaged by mechanical collision or scratching, and the outer surface of the packaging shell is covered with a conductive coating to increase the amount of current released by the auxiliary anode, and the packaging shell is integrated with the anode tube to increase the amount of current while maintaining a certain overall size. The inside of the auxiliary anode is provided with a terminal groove connected to the core wire inside the composite cable to ensure uniform discharge of the anode, and plastic is injected into the inside of the auxiliary anode through the injection hole, thereby improving the water tightness of the auxiliary anode and the reliability of the electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is an exploded view of a high current auxiliary anode structure of an external protective cover of the present invention;

[0016] Figure 2 is a schematic structural diagram of the anode assembly of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the protective cover described in the present invention.

[0018] Description of Figure Numbers:

[0019] 1. Anode assembly; 2. Protective cover; 3. Terminal groove; 4. Injection hole; 5. Anode connection hole; 6. Discharge hole; 7. Cable clamping rib plate; 8. Reinforcement rib; 9. Snap-on structure. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, this embodiment provides a high current auxiliary anode structure with an external protective cover, including: a set of (two halves) of anode assemblies 1 that are buckled, and a protective cover buckled on the outside of the anode assembly 1; the two halves of the anode assembly 1 are buckled and clamped on the outside of the cable, and the cable passes through the inside of the two halves of the anode assembly 1, and the two ends of the anode assembly 1 and the protective cover are respectively provided with concave card slots for clamping the cable, and the butt surface of the anode assembly 1 is provided with at least two anode connection holes, and the inner wall of the anode is provided with a terminal groove and an injection hole. After the inner core wire of the cable is led out from the side wall of the cable, it is crimped into the terminal groove, and the side of the external protective cover is opened, which is used as a medium (such as seawater) and current passing. The two ends of the anode assembly 1 and the protective cover 2 are provided with a card slot for clamping the composite cable, and the upper and lower edges of the connection surface of the anode assembly 1 are provided with a plurality of anode connection holes 5 for fixed connection, and screws are inserted into the anode connection holes 5 to fix the two anode assemblies 1. A terminal groove 3 is provided on the inner side of the anode assembly 1, and the terminal groove 3 is located at the center of the anode rod. The core wire inside the composite cable is crimped into the terminal groove 3 to ensure uniform anode discharge. The inner side of the anode assembly 1 is also provided with an injection hole 4. The function of the injection hole 4 is to fill the inner cavity of the auxiliary anode with plastic through the injection hole 4 after the two anode assemblies 1 are symmetrically connected, thereby ensuring the water tightness of the entire anode and the reliability of the electrical connection. A discharge hole 6 is opened on the protective cover 2 to ensure that the current generated by the auxiliary anode can be released to the outside, so as to protect the auxiliary anode.

[0022] The outer surface of the packaging shell is coated with MMO (metal oxide) coating, sintered or electroplated with platinum and other inert metals, and the previously independent packaging shell and anode tube are integrated into one, thereby realizing the functions of watertight packaging, cable clamping, and anode release protection current. At the same time, since the shell has a larger outer surface than a single anode tube, the discharge capacity of the auxiliary anode is increased, thereby increasing the current while maintaining a certain overall size.

[0023] The installation process of the above structure is: first, crimp the cable core wire inside the composite cable into the terminal groove 3 of the auxiliary anode. In order to ensure good water tightness of the connection part, it is necessary to apply waterproof glue inside the terminal groove 3; then, after the two anode assemblies 1 are symmetrically fixed and connected, injection molding is performed through the injection molding hole 4 to fill the cavity inside the auxiliary anode with plastic to ensure the water tightness of the entire anode and the reliability of the electrical connection; finally, after the two protective covers 2 are wrapped around the auxiliary anode, the two ends of the anode assembly 1 and the protective cover 2 are fixedly connected.

[0024] In this embodiment, anode assembly 1 is provided with a plurality of cable compression ribs 7 on one side of the terminal groove; the cable compression ribs 7 are located between the two ends of the anode assembly 1 and the terminal groove 3; the plurality of cable compression ribs 7 and the terminal groove 3 are located on the same axis of the anode assembly 1.

[0025] Specifically, if Figure 2 As shown, a cable compression rib plate 7 is also provided on the inner side of the anode assembly 1. The cable compression rib plate 7 is a rectangular plate-shaped structure. A plurality of cable compression rib plates 7 are longitudinally arranged on the same axis. The function of this structure is to compress and straighten the composite cable to prevent the cable from bending and generating eddy current loss, thereby improving the current transmission rate of the cable.

[0026] In this embodiment, reinforcing ribs 8 are further provided on the inner side of the protective cover 2 ; the reinforcing ribs 8 are plate-shaped structures; the reinforcing ribs 8 are arranged alternately in the axial and radial directions of the protective cover 2 .

[0027] Specifically, if Figure 3 As shown, in order to prevent the overhanging surface between the anode assembly 1 and the protective cover 2 from being too large and the span between the two ends from being too large, the load that the connection surface between the two can withstand is limited, and reinforcing ribs 8 are staggered axially and radially on the inner side of the protective cover 2 to increase the strength of the joint surface between the anode assembly 1 and the protective cover 2, thereby improving the service durability of the auxiliary anode.

[0028] In this embodiment, a plurality of threaded holes are respectively provided at both ends of the anode assembly 1 and the protection cover 2, and the anode assembly 1 and the protection cover 2 are fixedly connected by screws.

[0029] Specifically, if Figure 1 As shown, in order to fix the anode assembly 1 and the protective cover 2 together, multiple fastening threaded holes are provided at both ends of the two. After the two protective covers 2 are covered with the anode assembly 1, the fastening threaded holes at both ends are aligned respectively and then fixed with screws.

[0030] In this embodiment, two symmetrically fixedly connected anode assemblies 1 form a cylinder / rectangular parallelepiped, and two corresponding symmetrically fixedly connected protective covers 2 form a cylinder / rectangular parallelepiped.

[0031] Specifically, if Figure 1 As shown, the anode assembly 1 can be a cylinder or a rectangular parallelepiped structure, both of which can serve as carrier structures for the overall structure; the protective cover 2 can correspondingly use the same cylinder or rectangular parallelepiped as the anode assembly 1 to ensure the rationality of the overall structure.

[0032] In this embodiment, at least three rows of discharge holes (6) are respectively arranged on the surface of the protective cover 2 in the axial direction and the radial direction of the protective cover 2, and each row includes at least three discharge holes 6.

[0033] Specifically, if Figure 3 As shown, the main function of setting the discharge holes 6 is to prevent the protective cover 2 from hindering the current discharge. Therefore, in order to further enhance the current discharge effect of the auxiliary anode, the surface of the protective cover 2 is provided with at least three rows of discharge holes 6 in the axial and radial directions of the protective cover 2, and each row includes at least three discharge holes 6, so that the current can be discharged evenly while ensuring the current discharge effect.

[0034] In this embodiment, Figure 3 As shown, two symmetrical protective covers 2 are fixedly connected by a snap-fit ​​structure 9. The snap-fit ​​connection has the advantages of stable gap, convenient assembly, and saving unit cost. In combination with the above embodiment, the anode assembly 1 and the protective cover 2 are fixed by screws, which not only meets the structural strength, but also meets the cost requirements and even meets the assembly requirements.

[0035] In this embodiment, the anode assembly 1 and the protective cover 2 are integrally formed by casting, open mold injection molding or profile welding, which reduces the production cost while improving the air tightness of the anode assembly 1 and the protective cover 2. In addition, the mold molding process is conducive to the mass production of the overall device.

[0036] In this embodiment, the material of the anode assembly 1 can be titanium, or niobium or other commonly used auxiliary anode substrates. The mixed metal oxide IO2 / tantalum oxide Ta2O5 of the MMO anode can be fully exerted when coated on the titanium / niobium base. The coating on the titanium / niobium base can adapt to high-temperature environments, has a stable crystal structure, and has catalytic properties and good electrical conductivity.

[0037] The material of the protective cover 2 can be a titanium plate, or a seawater corrosion-resistant material such as polytetrafluoroethylene. Titanium has good resistance to high temperature, low temperature, strong acid, strong alkali, high strength and low density. Polytetrafluoroethylene is inert to most chemicals and solvents, and can resist strong acids and alkalis, water and various organic solvents. Both materials have good seawater corrosion resistance, thereby protecting the anode assembly 1 and improving the overall service life of the auxiliary anode.

[0038] The overall beneficial effects:

[0039] 1. Able to release large protection current and high electrical connection reliability;

[0040] 2. Excellent watertight performance;

[0041] 3. Simple structure and easy to manufacture;

[0042] 4. Mold forming processing is conducive to mass production;

[0043] 5. It has good underwater protection function.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high current auxiliary anode structure of an external protective cover, characterized in that: include: Two butted anode assemblies (1), and a protective cover (2) butted against the outside of the anode assemblies (1); The cable passes through the inside of the two anode assemblies (1), and both ends of the anode assembly (1) and the protective cover (2) are respectively provided with a slot for accommodating the cable, the butting surface of the anode assembly (1) is provided with at least two anode connection holes (5), and the non-butting surface is provided with a terminal groove (3) and an injection hole (4), the core wire inside the cable is crimped into the terminal groove (3), and the non-butting surface of the protective cover (2) is provided with a plurality of discharge holes (6); The outer surface of the anode assembly (1) is covered with a conductive coating; The anode assembly (1) is provided with a plurality of cable compression ribs (7) on one side of the anode assembly (1) provided with the terminal groove (3); The cable compression ribs (7) are located between the two ends of the anode assembly (1) and the terminal groove (3); a plurality of the cable compression ribs (7) and the terminal groove (3) are located on the same axis of the anode assembly (1); The anode assembly (1) and the protective cover (2) are integrally formed by respectively adopting casting, mold injection molding or profile welding production and processing methods.

2. The high current auxiliary anode structure of the external protection cover according to claim 1, characterized in that: The inner side of the protective cover (2) is also provided with reinforcing ribs (8); The reinforcing ribs (8) are plate-shaped structures; the reinforcing ribs (8) are arranged in an axial and radial manner staggered on the protective cover (2).

3. The high current auxiliary anode structure of the external protective cover according to claim 2, characterized in that: A plurality of threaded holes are respectively provided at both ends of the anode assembly (1) and the protective cover (2); the anode assembly (1) and the protective cover (2) are fixedly connected by screws.

4. The high current auxiliary anode structure of the external protection cover according to claim 3, characterized in that: Two symmetrically fixedly connected anode assemblies (1) form a cylinder / rectangular parallelepiped, and two corresponding symmetrically fixedly connected protective covers (2) form a cylinder / rectangular parallelepiped.

5. The high current auxiliary anode structure of the external protection cover according to claim 4, characterized in that: The surface of the protective cover (2) is provided with at least three rows of discharge holes (6) in the axial direction and radial direction of the protective cover (2), and each row includes at least three discharge holes (6).

6. The high current auxiliary anode structure of the external protection cover according to claim 3, characterized in that: The two symmetrical protective covers (2) are fixedly connected using a snap-fit ​​structure (9).

7. A high current auxiliary anode structure of an external protective cover according to any one of claims 1 to 6, characterized in that: The material of the anode assembly (1) is titanium / niobium; the material of the protective cover (2) is a titanium plate.

Images