CN121976196A - Tensioning type impressed current cathodic protection system - Google Patents

Abstract

The invention discloses a tensioning impressed current cathodic protection system which comprises a composite cable made of steel-cored aluminum stranded wires with outer jackets, a first insulation connecting structure arranged at the upper end of the composite cable and used for insulating and connecting the composite cable with a member to be protected, a cable branching structure arranged at the upper end of the composite cable and used for electrically connecting the composite cable with a power supply control cabinet, an auxiliary anode arranged on the composite cable and used for releasing current, and a second insulation connecting structure arranged at the lower end of the composite cable and used for insulating and connecting the composite cable with a gravity foundation. Compared with the existing composite cable copper used as a power line, the tensioning externally applied current cathodic protection system disclosed by the invention has the advantages of light weight and low price under the same current carrying requirement, and the steel-cored aluminum stranded wire only needs to be externally covered with the wear-resistant sheath, so that the production and processing process is simplified.

Description

Tensioning type impressed current cathodic protection system

Technical Field

The invention relates to the technical field of impressed current cathodic protection systems and ocean engineering, in particular to a tensioning impressed current cathodic protection system.

Background

On ocean platforms such as a jacket, an offshore wind power foundation and an offshore photovoltaic foundation in ocean engineering, ocean platform corrosion protection is generally carried out through a tensioning type impressed current cathodic protection system, a composite cable in the tensioning type impressed current cathodic protection system applied by the existing ocean engineering generally adopts a structure form comprising a steel wire rope, an insulating layer, a buffer layer, a conductor, a filling layer, a water blocking layer and an outer sheath from inside to outside, the composite cable of the structure is complex in production process, high in price cost and large in volume weight, the auxiliary anode position is connected with the composite cable, tap process treatment is needed, the tap structure is prone to occurrence of broken wire risk, and the sealing structure is prone to occurrence of water inlet short circuit and the like under water after the auxiliary anode is connected.

Disclosure of Invention

The invention provides a tension impressed current cathodic protection system aiming at the problems existing in the prior art.

The invention adopts the following technical means:

A tensioned impressed current cathodic protection system comprising:

a composite cable made of steel-cored aluminum stranded wires with outer jackets;

The first insulation connection structure is arranged at the upper end of the composite cable and used for insulating and connecting the composite cable and the member to be protected;

the cable branch structure is arranged at the upper end of the composite cable and used for electrically connecting the composite cable with the power supply control cabinet;

An auxiliary anode disposed on the composite cable for discharging current;

And the second insulation connecting structure is arranged at the lower end of the composite cable and used for insulating and connecting the composite cable with the gravity foundation.

Further, the first insulating connecting structure and the second insulating connecting structure have the same structure and comprise a sealing shell, a first sealing sleeve, a pressing gasket, a pressing cap, a connecting sleeve, a connecting rod and a nonmetal connecting plate;

One end of the connecting sleeve is connected with the steel core of the end part of the composite cable in a pressure welding way, and the other end of the connecting sleeve is fixed with a first connecting end plate;

The end part of the composite cable is sequentially sleeved with the first sealing sleeve, the compression gasket and the compression cap, the connecting sleeve is inserted into the cavity of the sealing shell from one end of the sealing shell, and the end part of the composite cable is fixedly connected with one end of the sealing shell in a sealing way through the first sealing sleeve, the compression gasket and the compression cap;

The connecting rod is characterized in that a second connecting end plate is fixed at one end of the connecting rod, a third connecting end plate is fixed at the other end of the connecting rod, the rod body of the connecting rod is sequentially sleeved with the first sealing sleeve, the compression gasket and the compression cap, one end of the connecting rod, which is fixed with the second connecting end plate, is inserted into a cavity of the sealing shell from the other end of the sealing shell, and the rod body of the connecting rod is fixedly connected with the other end of the sealing shell in a sealing manner through the first sealing sleeve, the compression gasket and the compression cap;

The first connecting end plate and the second connecting end plate are fixedly connected through the nonmetal connecting plate.

Further, two nonmetal connecting plates are symmetrically arranged between the first connecting end plate and the second connecting end plate.

Further, the auxiliary anode comprises an auxiliary anode main body, an auxiliary anode connecting sleeve, a conductive connecting block and a second sealing sleeve;

the auxiliary anode main body is of a sleeve structure, two ends of the auxiliary anode main body are respectively fixed with an auxiliary anode connecting sleeve, and the conductive connecting block and the second sealing sleeves positioned at two ends of the conductive connecting block are arranged in the auxiliary anode connecting sleeve;

The composite cable is provided with an aluminum stranded wire exposed part, the auxiliary anode main body is sleeved on the composite cable, the auxiliary anode connecting sleeves at two ends are respectively and fixedly connected with the composite cable in a sealing manner in a crimping manner, and the conductive connecting block is arranged at the aluminum stranded wire exposed part of the composite cable and is in crimping manner through the auxiliary anode connecting sleeves to realize the electric connection of the composite cable and the auxiliary anode main body.

Further, the auxiliary anode main body and the auxiliary anode connecting sleeve are made of titanium tubes with MMO plated on the surfaces;

the conductive connecting block is made of copper blocks.

Further, the cable branching structure comprises a branching cover shell, a branching cover end plate, a special-shaped parallel groove clamp, a branching cable and a waterproof joint;

The two ends of the wire-distributing cover shell are respectively fixed with the wire-distributing cover end plates, the special-shaped parallel groove clamps are arranged in the wire-distributing cover shell, and the composite cable passes through the wire-distributing cover shell and is fixedly connected with the wire-distributing cover end plates at the two ends in a sealing way through the waterproof joint;

one end of the branch cable is fixedly connected with the branch cover end plate at one end through a waterproof joint and is partially arranged in the cavity of the branch cover shell, and the part of the branch cable arranged in the cavity of the branch cover shell is electrically connected with the composite cable through the special-shaped parallel groove clamp.

Further, the composite cable tensioning device is connected with the first insulation connecting structure and used for tensioning and adjusting the composite cable;

The compound cable tensioning device comprises a turnbuckle and shackles fixed at two ends of the turnbuckle.

Further, the device also comprises a composite cable top anchoring device fixedly connected with the upper end of the composite cable tensioning device and used for fixedly connecting the upper end of the composite cable with the upper end of the member to be protected.

Further, the composite cable further comprises a gravity foundation fixedly connected with the lower end of the second insulating connecting structure and used for fixing the lower end of the composite cable.

Further, the nonmetallic connecting plate is made of FRP material, and epoxy structural adhesive is poured into the sealing shell.

Compared with the prior art, the tensioning type impressed current cathodic protection system has the advantages that the structure of the composite cable in the tensioning type impressed current cathodic protection system is changed from the original steel wire rope inner core, the insulating layer, the copper power (signal) wire and the outer sheath form into the steel core, the aluminum power (signal) wire and the outer sheath form, namely, the composite cable adopts a steel-cored aluminum stranded wire structure, the steel-cored aluminum stranded wire is a bare steel core, the steel-cored aluminum stranded wire is directly winded outside the steel core (the number of steel-cored wires and the wire diameter are selected according to the required tensile strength, the number of aluminum stranded wires is selected according to the required load current), the production and processing technology is simple, the steel-cored aluminum stranded wire is a standard product, the steel-cored aluminum stranded wire is made of aluminum as a power wire, compared with the original composite cable copper as a power wire, the weight is light and the price is low under the same current carrying requirement, the steel-cored aluminum is only required to be a customized product, and a plurality of insulating, wear-resistant and waterproof material structures are required between the steel wire element layer and the wire layer.

Drawings

FIG. 1 is a block diagram of a tensioned impressed current cathodic protection system of the present disclosure;

FIG. 2 is a block diagram of an insulated connection structure in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 3 is a cross-sectional view of an insulated connection in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 4 is an exploded view of an insulating connection structure in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 5 is a block diagram of a cable branching structure in a tensioned impressed current cathodic protection system of the present disclosure;

FIG. 6 is a cross-sectional view of a cable branching structure in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 7 is an exploded view of a cable branching structure in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 8 is a block diagram of an auxiliary anode in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 9 is a cross-sectional view of an auxiliary anode in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 10 is an exploded view of an auxiliary anode in the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 11 is a block diagram of the gravity base of the tensioned impressed current cathodic protection system of the present disclosure;

FIG. 12 is a block diagram of a composite cable tensioner in a tensioned impressed current cathodic protection system of the present disclosure;

In the figure, 1, a composite cable, 10, a steel core, 11, an aluminum stranded wire, 12, a sheath, 13, an exposed part of the aluminum stranded wire, 2, a first insulation connecting structure, 20, a sealing shell, 21, a first sealing sleeve, 22, a pressing gasket, 23, a pressing cap, 24, a connecting sleeve, 240, a first connecting end plate, 25, a connecting rod, 250, a second connecting end plate, 251, a third connecting end plate, 26, a nonmetallic connecting plate, 3, a cable branching structure, 30, a wire distributing cover shell, 31, a wire distributing cover end plate, 32, a special-shaped parallel groove clamp, 33, a branch cable, 34, a waterproof joint, 4, an auxiliary anode, 40, an auxiliary anode main body, 41, an auxiliary anode connecting sleeve, 42, a conductive connecting block, 43, a second sealing sleeve, 5, a composite cable tensioning device, 50, a turnbuckle, 51, a shackle, 6, a composite cable top anchoring device, 7, a gravity foundation and 8, a second insulation connecting structure.

Detailed Description

As shown in fig. 1, the disclosed tensioned impressed current cathodic protection system includes:

a composite cable 1 made of steel-cored aluminum stranded wires with outer jackets;

a first insulation connection structure 2 arranged at the upper end of the composite cable 1 for insulating and connecting the composite cable 1 with a member to be protected;

the cable branch structure 3 is arranged at the upper end of the composite cable 1 and is used for electrically connecting the composite cable 1 with a power supply control cabinet;

An auxiliary anode 4 provided on the composite cable 1 for discharging current;

and a second insulation connection structure 8 arranged at the lower end of the composite cable 1 for insulating and connecting the composite cable 1 with the gravity foundation 7.

Specifically, in the tensioning type impressed current cathodic protection system disclosed by the invention, the composite cable 1 is made of a steel-cored aluminum stranded wire with an outer sheath, the steel-cored aluminum stranded wire with the outer sheath has a concrete structure comprising a steel core 10 in the middle, an aluminum stranded wire 11 stranded on the steel core 10 and a sheath 12 arranged outside the aluminum stranded wire 11, the upper end and the lower end of the composite cable 1 are respectively fixedly connected with the upper end of an ocean platform to be protected and a gravity foundation 7 through a first insulation connecting structure 2 and a second insulation connecting structure 8, a cable branch structure 3 is fixed at the upper part of the composite cable 1, the electric connection between a power control cabinet and the composite cable 1 can be realized through the cable branch structure 3, the auxiliary anode 4 is fixed on the composite cable 1, the protected metal is made into a cathode by being used as an anode release current under the drive of an impressed ocean direct current of the power control cabinet, and corrosion of the protected metal is inhibited by the composite cable is so as to protect the structure. According to the tensioning type impressed current cathodic protection system disclosed by the invention, as the first insulation connecting structure 2 and the second insulation connecting structure 8 are arranged, the composite cable 1 is fixedly connected with the upper end of an ocean platform to be protected and the gravity foundation 7 in an insulation manner through the first insulation connecting structure 2 and the second insulation connecting structure 8, so that the composite cable 1 does not need to be internally insulated (the steel core is insulated with a power line or a signal line), the structural form of the composite cable 1 in the tensioning type impressed current cathodic protection system disclosed by the invention is changed from the form of an original steel wire rope inner core, an insulation layer, a copper power (signal) line and an outer sheath into the form of a steel core, an aluminum power (signal) line and an outer sheath, namely, the composite cable 1 adopts a steel core aluminum stranded wire structure, the steel core aluminum stranded wire is a bare steel core, the number of steel core strands and the diameter of the steel core are selected according to the required tensile strength, the number of aluminum stranded wires is selected according to the required load current, the production process is simple, the steel core aluminum is a standard product, the composite cable is a production process is a product, compared with the aluminum stranded wire cable, the composite cable is used as a power cable, the composite cable is manufactured by the composite cable, the composite cable has a low-weight, the composite cable is required to be manufactured, and the composite cable has a low-cost and has a high wear-resistant performance, and a high requirement compared with the existing composite cable and has a high requirement.

Further, the first insulation connecting structure 2 and the second insulation connecting structure 8 have the same structure, and comprise a sealing shell 20, a first sealing sleeve 21, a pressing gasket 22, a pressing cap 23, a connecting sleeve 24, a connecting rod 25 and a nonmetal connecting plate 26;

one end of the connecting sleeve 24 is in pressure connection with the steel core 10 at the end part of the composite cable 1, and the other end of the connecting sleeve is fixed with a first connecting end plate 240;

the end part of the composite cable 1 is sequentially sleeved with the first sealing sleeve 21, the compression gasket 22 and the compression cap 23, the connecting sleeve 24 is inserted into the cavity of the sealing shell 20 from one end of the sealing shell 20, and the end part of the composite cable 1 is fixedly connected with one end of the sealing shell 20 in a sealing way through the first sealing sleeve 21, the compression gasket 22 and the compression cap 23;

a second connection end plate 250 is fixed at one end of the connection rod 25, a third connection end plate 251 is fixed at the other end of the connection rod, the rod body of the connection rod 25 is sequentially sleeved with the first sealing sleeve 21, the compression gasket 22 and the compression cap 23, one end of the connection rod 25, which is fixed with the second connection end plate 250, is inserted into the cavity of the sealing shell 20 from the other end of the sealing shell 20, and the rod body of the connection rod 25 is fixedly connected with the other end of the sealing shell 20 in a sealing manner through the first sealing sleeve 21, the compression gasket 22 and the compression cap 23;

The first connection end plate 240 and the second connection end plate 250 are fixedly connected through the nonmetal connection plate 26.

Specifically, as shown in fig. 2,3 and 4, the first insulation connection structure 2 and the second insulation connection structure 8 have the same structure, and comprise a sealing shell 20, the sealing shell 20 is of a tubular structure, two ends of the sealing shell 20 are of a stepped hole structure and are provided with internal threads, a first sealing sleeve 21 and a compression gasket 22 can be sequentially plugged into the stepped hole, and the compression cap 23 is in threaded connection with the sealing shell 20, so that the compression cap 23 extrudes the first sealing sleeve 21 and the compression gasket 22, the sealing connection between the first sealing sleeve 21 and the composite cable 1 and the sealing connection between the first sealing sleeve 21 and the connecting rod 25 are realized, the jacket and the aluminum stranded wire are removed from the end part length of the composite cable 1, only the steel core 10 is reserved, the connecting sleeve 24 is of a pipe structure, one end is of an open end, the other end is welded with the first connecting end plate 240, the steel core 10 at the end of the composite cable 1 can be plugged into the connecting sleeve 24 and connected through crimping, the rod body of the connecting rod 25 can be of a pipe structure or a solid structure, the two ends of the connecting rod 25 are respectively welded with the second connecting end plate 250 and the third connecting end plate 251, the connecting end plate is provided with the connecting end plate 25, and other parts such as to penetrate through bolts and other parts are conveniently connected with other through holes. The connecting rod 25 and the composite cable 1 are fixedly connected with the two ends of the sealing shell 20 respectively through the first sealing sleeve 21, the pressing gasket 22 and the pressing cap 23, the first connecting end plate 240 and the second connecting end plate 250 are arranged in the cavity of the sealing shell 20, a certain distance is reserved between the first connecting end plate and the second connecting end plate, the connecting rod 25 and the composite cable 1 are not in direct contact, the first connecting end plate 240 and the second connecting end plate 250 are fixedly connected through the nonmetal connecting plate 26, the first connecting end plate 240 and the second connecting end plate 250 are connected through the nonmetal connecting plate 26, the insulation connection between the composite cable 1 and the first insulation connecting structure 2 or the second insulation connecting structure 8 is realized, and the electrical insulation connection between the composite cable 1 and a ocean platform to be protected is realized. Meanwhile, the insulating connecting structure disclosed by the application has the advantages of small volume, simplicity in installation, good reliability and the like.

Further, two nonmetal connection plates 26 are symmetrically disposed between the first connection end plate 240 and the second connection end plate 250.

Specifically, two nonmetal connecting plates 26 are symmetrically arranged between the first connecting end plate 240 and the second connecting end plate 250, and the nonmetal connecting plates 26 are fixedly connected with the first connecting end plate 240 and the second connecting end plate 250 through bolts and nuts, so that the connection strength is further improved, and the connection performance is ensured.

Further, the auxiliary anode 4 comprises an auxiliary anode body 40, an auxiliary anode connecting sleeve 41, a conductive connecting block 42 and a second sealing sleeve 43;

the auxiliary anode main body 40 has a sleeve structure, two ends of the auxiliary anode main body 40 are respectively fixed with an auxiliary anode connecting sleeve 41, and the auxiliary anode connecting sleeve 41 is internally provided with the conductive connecting block 42 and the second sealing sleeves 43 positioned at two ends of the conductive connecting block 42;

the composite cable 1 is provided with an aluminum stranded wire exposed part 13, the auxiliary anode main body 40 is sleeved on the composite cable 1, the auxiliary anode connecting sleeves 41 at two ends are respectively and fixedly connected with the composite cable 1 in a sealing way in a crimping way, and the conductive connecting blocks 42 are arranged at the aluminum stranded wire exposed part 13 of the composite cable 1 and realize the electric connection of the composite cable 1 and the auxiliary anode main body 40 through the crimping of the auxiliary anode connecting sleeves 41.

Specifically, as shown in fig. 8, fig. 9 and fig. 10, the tensioning impressed current cathodic protection system disclosed by the application comprises a tubular auxiliary anode main body 40, two ends of the auxiliary anode main body 40 are fixed with auxiliary anode connecting sleeves 41 in a welding or other mode, a composite cable 1 can pass through the auxiliary anode 40 and the auxiliary anode connecting sleeves 41, two parts of the composite cable 1 are provided with jackets to remove jackets to form an aluminum stranded wire exposed part 13, two sides of the aluminum stranded wire exposed part 13 on the composite cable 1 are sleeved with second sealing sleeves 43, the aluminum stranded wire exposed part 13 is provided with a conductive connecting block 42, the conductive connecting block 42 is two semicircular conductive metal blocks, the two conductive metal blocks are buckled on the aluminum stranded wire exposed part 13 of the composite cable 1, the auxiliary anode 4 can be fixed on the composite cable 1 and connected in a sealing mode through crimping the auxiliary anode connecting sleeves 41, and the conductive connecting block 42 can be contacted with the aluminum stranded wire and the auxiliary anode connecting sleeves 41 after the auxiliary anode connecting sleeves 41 are crimped so as to realize electric connection. Compared with the auxiliary anode in the prior art, the auxiliary anode disclosed by the application adopts the mode that the anode rod and the composite cable tap are connected to realize electric connection, and the anode rod is fixed through the anode rod, the titanium shell and integral injection molding, so that the auxiliary anode is watertight protected.

Further, the auxiliary anode body 40 and the auxiliary anode connecting sleeve 41 are made of titanium tubes with surfaces plated with MMO, and the conductive connecting block 42 is made of copper block.

The auxiliary anode 4 is formed by taking a titanium tube as a base material, plating MMO on the surface of a main body, welding crimping titanium tubes with two ends adapted to the wire diameter of a tensile cable, cutting an outer sheath at the crimping position of the titanium tube of the tensile cable, exposing an aluminum stranded wire, clamping an upper half copper block and a lower half copper block at the aluminum stranded wire, installing rubber sleeves (second sealing sleeves 43) at two ends of the copper block to prevent the crimping copper block from shifting, penetrating the crimping titanium tube to the crimping position of the copper block, crimping the crimping titanium tube by a pipe shrinking machine, reliably connecting the crimping copper block of the titanium tube with the aluminum stranded wire, supplying power to the aluminum stranded wire with a steel core, and only assisting the anode to realize reliable electric connection.

Further, the cable branching structure 3 includes a branching cover housing 30, a branching cover end plate 31, a profiled parallel groove clamp 32, a branching cable 33, and a waterproof joint 34;

The two ends of the wire-distributing cover shell 30 are respectively fixed with the wire-distributing cover end plates 31, the special-shaped parallel groove clamps 32 are arranged in the wire-distributing cover shell 30, and the composite cable 1 passes through the wire-distributing cover shell 30 and is fixedly connected with the wire-distributing cover end plates 31 at the two ends in a sealing way through the waterproof joints 34;

One end of the branch cable 33 is fixedly connected with the branch cover end plate 31 at one end through a waterproof connector 34 and is partially arranged in the cavity of the branch cover shell 30, and the portion of the branch cable 33 arranged in the cavity of the branch cover shell 30 is electrically connected with the composite cable 1 through the special-shaped parallel groove clamp 32.

Specifically, as shown in fig. 5, 6 and 7, the cable branching structure 3 of the present application includes a tubular branching cover housing 30, branching cover end plates 31 are respectively fixed at two ends of the branching cover housing 30, special-shaped parallel groove clamps 32 are disposed in a cavity of the branching cover housing 30, the composite cable 1 penetrates through the branching cover housing 30 and the branching cover end plates 31 at two ends, and a waterproof joint 34 is disposed between the composite cable 1 and the branching cover end plates 31 to realize sealing connection. One end of the branch cable 33 is connected with the branch cover end plate 31 at one end through a waterproof joint 34, and part of the branch cable 33 is placed in the cavity of the branch cover shell 30 and is electrically connected with the composite cable 1 through the special-shaped parallel groove clamp 32. The aluminum stranded wires 11 and branch cables of the composite cable 1 are respectively cut off from the outer jackets of the connection positions of the special-shaped parallel groove clamps, the core wires (aluminum wires/copper wires) are exposed, then the special-shaped parallel groove clamps are respectively connected and fixed with the aluminum stranded wires 11 and the branch cables 33 of the composite cable 1 in a clamping mode, so that the electric connection of the aluminum stranded wires and the branch cables 33 of the steel core of the composite cable 1 is realized, the power supply transmission path of a cabinet power supply, the branch cables and the auxiliary anodes is realized, the electric connection position of the cable branch structure 3 is integrally packaged and protected through a branch cover shell 30, the branch cover shell preferably adopts standard seamless steel pipes, one end of the branch cover shell is welded with an end plate, the shell is integrally sealed in a screwing nut mode, and the matched waterproof joint is selected for realizing sealing and protecting at the wire inlet and outlet positions. Compared with the existing branching cover structure, the branching cover has the advantages of small volume, light weight, simple processing and lower cost.

Further, the device also comprises a composite cable tensioning device 5 which is connected with the first insulation connecting structure 2 and used for tensioning and adjusting the composite cable 1;

The composite cable tensioning device 5 comprises a turnbuckle 50 and shackles 51 fixed at two ends of the turnbuckle 50.

Specifically, as shown in fig. 1 and 12, a composite cable tensioning device 5 is further connected to the upper side of the first insulation connection structure 2, the composite cable tensioning device 5 includes a turnbuckle 50 and shackles 51 fixed to two ends of the turnbuckle 50, and the shackles at two ends can be connected to the third connection end plate 251 and the composite cable top anchoring device 6 on the first insulation connection structure 2, respectively, and the turnbuckle 50 is shortened by screwing, so as to realize the function of tensioning the composite cable 1.

Further, the device also comprises a composite cable top anchoring device 6 fixedly connected with the upper end of the composite cable tensioning device 5 and used for fixedly connecting the upper end of the composite cable 1 with the upper end of a member to be protected.

Specifically, the composite cable top anchoring device 6 is fixed at the upper end of the composite cable tensioning device 5, and the composite cable top anchoring device 6 comprises a shackle, an eye plate, an anchor chain and other structures, so that the upper end of the composite cable 1 is fixedly connected with the upper end of a member to be protected, and the tensile force of the tensile cable in the working state is borne.

Further, the gravity foundation 7 is fixedly connected with the lower end of the second insulation connection structure 8 and used for fixing the lower end of the composite cable 1.

Specifically, as shown in fig. 1 and 11, the gravity foundation 7 is a counterweight structure of a suspended tension type composite cable, and the tension force and counterweight mass required by designing the composite cable are calculated, and the gravity foundation structure form is calculated according to the design requirement and combined with the materials, seawater buoyancy and other factors, so that the gravity foundation can be stably submerged in the seabed to provide tension force for the composite cable.

Further, the nonmetallic connecting plate 26 is made of FRP material, and epoxy structural adhesive is poured into the sealed housing 20.

Specifically, the non-metal connection plate 26 is made of FRP (fiber reinforced composite) material, which has the advantages of light weight, high strength, corrosion resistance and the like, and further ensures the connection strength and the service life of the tension impressed current cathodic protection system disclosed by the application. According to the application, the nonmetallic connecting plate 26 is made of FRP materials, so that the steel core structure of the steel core aluminum stranded wire is rotated out in a steel pipe crimping steel core mode, the steel core aluminum stranded wire is insulated from the connecting structure through the FRP material adapter plate, the waterproof requirement of the whole adapter point is realized through designing the FRP shell and the two-end sealing and plugging structure, and compared with a traditional end sealing cover structure, the waterproof sealing structure is small in size, simple to install and good in reliability. Further, after the two ends of the nonmetal connecting plate 26 are connected in an insulating way, the insulation part is integrally sealed and protected through the nonmetal shell and the sealing structural members at the two ends, and epoxy structural adhesive is poured into the cavity of the sealing shell 20 to improve the tensile property and the watertight property of the whole structure, so that the application of severe working conditions and deep water environments is realized.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. A tensioned impressed current cathodic protection system comprising:

a composite cable made of steel-cored aluminum stranded wires with outer jackets;

The first insulation connection structure is arranged at the upper end of the composite cable and used for insulating and connecting the composite cable and the member to be protected;

the cable branch structure is arranged at the upper end of the composite cable and used for electrically connecting the composite cable with the power supply control cabinet;

An auxiliary anode disposed on the composite cable for discharging current;

And the second insulation connecting structure is arranged at the lower end of the composite cable and used for insulating and connecting the composite cable with the gravity foundation.

2. The impressed current cathodic protection system of claim 1 wherein said first and second insulating connecting structures have the same structure comprising a sealed housing, a first gland, a compression gasket, a compression cap, a connecting sleeve, a connecting rod, and a non-metallic connecting plate;

One end of the connecting sleeve is connected with the steel core of the end part of the composite cable in a pressure welding way, and the other end of the connecting sleeve is fixed with a first connecting end plate;

The end part of the composite cable is sequentially sleeved with the first sealing sleeve, the compression gasket and the compression cap, the connecting sleeve is inserted into the cavity of the sealing shell from one end of the sealing shell, and the end part of the composite cable is fixedly connected with one end of the sealing shell in a sealing way through the first sealing sleeve, the compression gasket and the compression cap;

The connecting rod is characterized in that a second connecting end plate is fixed at one end of the connecting rod, a third connecting end plate is fixed at the other end of the connecting rod, the rod body of the connecting rod is sequentially sleeved with the first sealing sleeve, the compression gasket and the compression cap, one end of the connecting rod, which is fixed with the second connecting end plate, is inserted into a cavity of the sealing shell from the other end of the sealing shell, and the rod body of the connecting rod is fixedly connected with the other end of the sealing shell in a sealing manner through the first sealing sleeve, the compression gasket and the compression cap;

The first connecting end plate and the second connecting end plate are fixedly connected through the nonmetal connecting plate.

3. The impressed current cathodic protection system of claim 2 wherein two of said non-metallic connecting plates are symmetrically disposed between said first and second connecting end plates.

4. The tensioned impressed current cathodic protection system recited in claim 1 wherein the auxiliary anode comprises an auxiliary anode body, an auxiliary anode connection sleeve, a conductive connection block, and a second seal cartridge;

the auxiliary anode main body is of a sleeve structure, two ends of the auxiliary anode main body are respectively fixed with an auxiliary anode connecting sleeve, and the conductive connecting block and the second sealing sleeves positioned at two ends of the conductive connecting block are arranged in the auxiliary anode connecting sleeve;

The composite cable is provided with an aluminum stranded wire exposed part, the auxiliary anode main body is sleeved on the composite cable, the auxiliary anode connecting sleeves at two ends are respectively and fixedly connected with the composite cable in a sealing manner in a crimping manner, and the conductive connecting block is arranged at the aluminum stranded wire exposed part of the composite cable and is in crimping manner through the auxiliary anode connecting sleeves to realize the electric connection of the composite cable and the auxiliary anode main body.

5. The tension impressed current cathodic protection system of claim 4 wherein said auxiliary anode body and said auxiliary anode connecting sleeve are titanium tubes surface plated with MMO;

the conductive connecting block is made of copper blocks.

6. The system of claim 1, wherein the cable branching structure comprises a branch cover housing, a branch cover end plate, a profiled parallel groove clamp, a branch cable, and a waterproof joint;

The two ends of the wire-distributing cover shell are respectively fixed with the wire-distributing cover end plates, the special-shaped parallel groove clamps are arranged in the wire-distributing cover shell, and the composite cable passes through the wire-distributing cover shell and is fixedly connected with the wire-distributing cover end plates at the two ends in a sealing way through the waterproof joint;

one end of the branch cable is fixedly connected with the branch cover end plate at one end through a waterproof joint and is partially arranged in the cavity of the branch cover shell, and the part of the branch cable arranged in the cavity of the branch cover shell is electrically connected with the composite cable through the special-shaped parallel groove clamp.

7. The impressed current cathodic protection system of claim 1 further comprising a composite cable tensioning device coupled to said first insulating connection structure for tension adjustment of said composite cable;

The compound cable tensioning device comprises a turnbuckle and shackles fixed at two ends of the turnbuckle.

8. The impressed current cathodic protection system of claim 7 further comprising a composite cable top anchor fixedly attached to the upper end of the composite cable tensioning device for fixedly attaching the upper end of the composite cable to the upper end of the member to be protected.

9. The impressed current cathodic protection system of claim 1 further comprising a gravitational foundation fixedly attached to the lower end of said second insulating connecting structure for securing the lower end of said composite cable.

10. The tensioned impressed current cathodic protection system recited in claim 2 or 3 wherein said non-metallic connecting plates are FRP;

And epoxy structural adhesive is filled in the sealing shell.