Optical fiber composite submarine cable joint device

Abstract

The invention provides an optical fiber composite submarine cable connector device which comprises a connecting cylinder, an optical cable connector box, a middle connector and connecting flanges arranged at the two ends of the connecting cylinder, each connecting flange is provided with an anchoring device, and each anchoring device comprises an anchoring base with a first conical connecting part and an anchoring locking piece installed on the anchoring base. The anchoring locking piece is provided with a second conical connecting part; a stop flange is further arranged in the connecting cylinder, and an anode block is arranged on the outer surface of the connecting cylinder. Through the cooperation of the first conical connecting part and the second conical connecting part, the conical surface generates a self-locking effect under the action of tension, the anchoring contact area and friction force are increased, the steel wire is prevented from slipping, and the reliability in a large-tension scene is improved; the stop flange fixes the position of the cable core, thereby preventing the internal structure of the joint from being damaged due to the suspension and shaking of the cable core in the transportation and installation process, and improving the mechanical stability of the joint. The anode block delays seawater corrosion of the metal shell through a sacrificial anode protection method, and the service life of the connector is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cable construction, and in particular to an optical fiber composite submarine cable joint device. Background Art

[0002] A submarine cable is a cable system used for transmitting electric power, communication, and data signals under the sea, and is an important infrastructure for modern communication and energy transmission. With the rapid development of economic construction, many offshore islands and offshore oil and gas platforms and other marine facilities have demands for various resources such as electric power, communication, fresh water, oil, and gas, and various submarine cables need to be laid separately. Due to the connection of multiple sections of submarine cables or due to the activities of submarine animals, fishing boat trawling, ship anchoring, or other reasons, the submarine cable breaks or fails, and a submarine cable joint is required to connect the submarine cable to ensure the normal operation of the submarine cable. At present, a soft joint (also known as a factory joint) is often used for the connection of submarine cables. The form of the submarine cable repair joint is an intermediate joint, an optical cable joint box plus a metal waterproof protective shell. The intermediate joint plays a role in connecting the cables, and among them, the prefabricated / cold-shrinkable and wrapped intermediate joints are widely used in the connection of submarine cables; the optical cable joint box is used to place the optical fiber unit after the fusion splicing operation to ensure the normal operation of the optical cable; the metal waterproof protective shell plays a mechanical protection role, and the inside of the shell is filled with an insulating waterproof sealant to achieve the insulating and waterproof sealing effect. However, the existing repair joints have the following technical problems: 1. The wire anchoring at both ends is a flange plate flat wire anchoring device, which presses the wire by a pressing plate to play the role of wire anchoring. It can be applied under small tensile forces. Under large tensile forces, the wire cannot be pressed tightly, resulting in the wire slipping off and losing the wire anchoring effect, causing damage to the joint.

[0003] 2. The cable core of the submarine cable is in a suspended and unfixed state inside the metal shell, and it is easy to cause damage to the intermediate joint during transportation, handling, and before on-site installation and pouring of glue.

[0004] 3. The shell is easily corroded under the long-term immersion of seawater, which affects the mechanical protection performance of the joint. It is more likely to cause the joint to break, fail, or be damaged under the action of submarine animal activities, fishing boat trawling, ship anchoring, or other reasons. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide an optical fiber composite submarine cable joint device.

[0006] The present invention is implemented by the following method: an optical fiber composite submarine cable joint device, comprising a connecting tube, an optical cable joint box and an intermediate joint, and connecting flanges provided at both ends of the connecting tube, the cable passes through the connecting flange and is joined in the connecting tube by the intermediate joint, the connecting tube is filled with insulating sealant, the connecting flange is provided with an anchoring device, the anchoring device comprises an anchoring base with a first conical connecting portion, and an anchoring locking piece installed on the anchoring base, the anchoring locking piece has a second conical connecting portion, the first conical connecting portion cooperates with the second cone, and the cable is connected between the first conical connecting portion and the second conical connecting portion; a stop flange is also provided in the connecting tube, the cable passes through the stop flange, and is used to position the cable; the optical cable joint box is arranged in the connecting tube, and an anode block is provided on the outer surface of the connecting tube.

[0007] Preferably, the anchor locking member includes an anchor cone and an anchor pressure plate, the second conical connecting portion is arranged on the anchor cone, the anchor pressure plate is locked and connected to the anchor cone, the anchor base is located between the anchor cone and the anchor pressure plate, the small ends of the first conical connecting portion and the second conical connecting portion face away from the anchor pressure plate, and the large ends of the first conical connecting portion and the second conical connecting portion face the anchor pressure plate; the small end of the first conical connecting portion faces the connecting flange.

[0008] Preferably, the anchoring cone is sleeved on the outer periphery of the anchoring base, and a first locking bolt is provided between the anchoring pressure plate and the anchoring cone; a second locking bolt is provided between the anchoring pressure plate and the anchoring base, and the armored steel wire of the cable is bent around the cone surface between the anchoring cone and the anchoring base.

[0009] Preferably, the stop flange is composed of two semicircular positioning pieces, and the opposite surfaces of the two positioning pieces are provided with positioning grooves for passing the cables; the cylinder body of the connecting cylinder is provided with a glue injection port.

[0010] Preferably, a bending limiter of the cable is connected to the side of the connecting flange facing away from the connecting cylinder; and two stop flanges are provided, which are respectively located at the left and right parts of the cylinder body to fix the cables on both sides.

[0011] Preferably, the core of the cable is twisted into an S shape during installation to leave a vibration margin.

[0012] Preferably, the surface of the connecting cylinder is provided with cylinder reinforcement ribs.

[0013] Preferably, the outer surface of the cylinder is provided with a plurality of longitudinal and transverse reinforcing ribs.

[0014] Preferably, the anode block is locked to the cylinder body of the connecting cylinder by fasteners, and the anode block and the cylinder body of the connecting cylinder are also fixedly welded by full welding.

[0015] Preferably, a plurality of anode blocks are arranged at intervals, and the anode blocks are aluminum-zinc-indium anode blocks; a high-solid epoxy coating is also coated on the outer surface of the cylinder body of the connecting cylinder.

[0016] Preferably, the intermediate joint is a cold-shrinkable intermediate joint, or the intermediate joint is a wrapped intermediate joint; a plurality of lifting rings are arranged on the outer surface of the connecting cylinder.

[0017] The beneficial effects of the present invention are as follows: The present invention provides a fiber optic composite submarine cable joint device. Compared with the prior art, the present invention has at least the following technical effects: 1. Through the cooperation of the first tapered connection part and the second tapered connection part, a self-locking effect is generated on the conical surface under the action of tension, increasing the anchoring contact area and friction force, preventing the steel wire from slipping, and improving the reliability in high-tension scenarios; the stop flange fixes the position of the cable core, avoiding damage to the internal structure of the joint caused by the suspension and shaking of the core during transportation and installation, and improving the mechanical stability of the joint; the optical cable joint box is integrated in the connecting cylinder, reducing the impact of the external impact on the optical fiber; the anode block delays the seawater corrosion of the metal shell through the sacrificial anode protection method, extending the service life of the joint. 2. The anchoring pressing plate and the cone barrel are designed in a split structure, which is convenient for installation and maintenance. The conical direction design (the small end facing outwards) makes the tension direction consistent with the self-locking direction of the conical surface (the direction of extrusion and pressing is also towards the outside of the connecting cylinder), further improving the anchoring reliability; the conical direction is designed with the large end facing the anchoring pressing plate, and a radial pressing force is generated on the conical surface under the action of tension, enhancing the anchoring strength through the mechanical wedge effect. 3. The first locking bolt (between the cone barrel and the pressing plate) and the second locking bolt (between the pressing plate and the base) form a multi-stage fixation, ensuring the overall rigidity of the anchoring device and preventing loosening; the steel wire is bent around the cone barrel surface to increase the contact area, and the tensile strength is improved by combining with the conical surface pressing, avoiding the slipping of the steel wire. 4. The modular design of the two semi-circular stop flanges is convenient for on-site installation, and the positioning groove accurately fixes the position of the cable, preventing stress concentration caused by cable deviation. 5. When the core is installed, it is slightly twisted into an S shape to reserve a vibration margin, preventing damage to the intermediate joint during transportation, handling, and before on-site installation and potting. 6. The cylinder body reinforcing ribs improve the structural strength of the connecting cylinder, resist the high pressure and mechanical impact of the seabed, and prevent the cylinder body from deforming and causing seal failure. 7. The aluminum-zinc-indium alloy anode is suitable for high-salinity seawater environments; the high-solid epoxy coating provides a physical barrier, and the dual anti-corrosion system significantly improves the anti-corrosion performance. Description of the Drawings

[0018] Figure 1 is the first external view of a fiber optic composite submarine cable joint device of the present invention.

[0019] Figure 2It is a schematic diagram of the first cross-section of an optical fiber composite submarine cable joint device of the present invention.

[0020] Figure 3 It is a schematic diagram of the second cross-section of an optical fiber composite submarine cable joint device of the present invention.

[0021] Figure 4 It is a schematic diagram of the first external appearance of an optical fiber composite submarine cable joint device of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of a cone-type anchoring device of an optical fiber composite submarine cable joint device of the present invention.

[0023] Figure 6 It is a partial enlarged schematic diagram of the installation of an anode block of an optical fiber composite submarine cable joint device of the present invention.

[0024] Figure 7 It is a schematic diagram of the connection state in which the core of an optical fiber composite submarine cable joint device of the present invention is slightly twisted into an S shape.

[0025] Figure 8 It is a schematic diagram of a cold-shrink type intermediate joint of an optical fiber composite submarine cable joint device of the present invention.

[0026] Figure 9 It is a schematic diagram of a wrapped type intermediate joint of an optical fiber composite submarine cable joint device of the present invention.

[0027] Figure 10 It is a schematic diagram of the cross-section of an optical cable joint box of an optical fiber composite submarine cable joint device of the present invention.

[0028] Description of the attached reference numerals: 1. Bending limiter; 2. Connecting flange; 3. Anchoring base; 4. Anchoring cone; 5. Anchoring pressing plate; 6. Cone part; 7. Straight tube part; 8. Intermediate joint; 9. Optical cable joint box; 10. Insulating sealant; 11. Stop flange; 12. Glue filling port; 13. Lifting ring; 14. Reinforcing rib; 15. Anode block; 16. Core; 17. Armor wire; 18. Fastener; 19. Full welding; 201. Single-phase outer sheath of cable; 202. Lead sheath of cable; 203. Lead seal; 204. Heat shrinkable tube; 205. Copper shell; 206. Cable sealant; 207. Connecting pipe; 208. Cable conductor; 209. Cable insulation; 210. Intermediate joint body; 301. Heat shrinkable sleeve; 203. Semiconducting tape; 303. Crimping fitting; 304. Insulating tape; 305. Copper wire mesh sleeve; 306. Stress control tape; 307. Constant force spring; 308. Waterproof insulating tape; 309. Sealant putty; 310. PVC tape; 311. Copper braid; 401. Optical cable joint box body; 402. Optical cable joint box cover; 403. O-ring; 404. Fiber fusion tray; 405. Fiber optic heat shrinkable tube; 406. Grounding wire; 407. Spring buckle; 408. Sealed waterproof gland; 409. First screw; 410. Second screw. Detailed implementation mode

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Please refer to Figures 1 to 10, a fiber optic composite submarine cable joint device, comprising a connecting tube, an optical cable joint box 9 and an intermediate joint 8, and connecting flanges 2 are provided at both ends of the connecting tube, the cable passes through the connecting flange 2 and is joined in the connecting tube by the intermediate joint 8, the connecting tube is filled with insulating sealant 10, the connecting flange 2 is provided with an anchoring device, the anchoring device comprises an anchoring base 3 with a first conical connecting portion, and an anchoring locking member mounted on the anchoring base 3, the anchoring locking member has a second conical connecting portion, the first conical connecting portion cooperates with the second cone, and the cable is connected between the first conical connecting portion and the second conical connecting portion; a stop flange 11 is also provided in the connecting tube, the cable passes through the stop flange 11, and is used to position the cable; the optical cable joint box 9 is arranged in the connecting tube, and an anode block 15 is provided on the outer surface of the connecting tube. The connecting tube includes a straight tube part 7 and a connecting cone tube part 6. The connecting cone tube part 6 is arranged at both ends of the straight tube part 7. The connecting flange 2 is fixed at the end of the connecting cone tube part 6 away from the straight tube. The stop flange 11 is located at the junction of the straight tube part 7 and the connecting cone tube part 6. Through the cooperation of the first conical connecting part and the second conical connecting part, the conical surface produces a self-locking effect under the action of tension, which increases the anchoring contact area and friction, prevents the steel wire from slipping off, and improves the reliability in high tension scenarios; the stop flange 11 fixes the position of the cable core 16 to avoid damage to the internal structure of the joint due to the hanging and shaking of the core 16 during transportation and installation, and improves the mechanical stability of the joint; the optical cable joint box 9 is integrated in the connecting tube to reduce the impact of external impact on the optical fiber; the anode block 15 delays the seawater corrosion of the metal shell through the sacrificial anode protection method, thereby extending the service life of the joint.

[0031] See also Figures 1 to 3 , Figure 5 , Figure 7 Preferably, the anchor locking member comprises an anchor cone 4 and an anchor pressure plate 5, the second conical connection portion is arranged on the anchor cone 4, the anchor pressure plate 5 is locked and connected with the anchor cone 4, the anchor base 3 is located between the anchor cone 4 and the anchor pressure plate 5, the small ends of the first conical connection portion and the second conical connection portion are away from the anchor pressure plate 5, and the large ends of the first conical connection portion and the second conical connection portion are facing the anchor pressure plate 5; the small end of the first conical connection portion is facing the connecting flange 2. The split structure of the anchor pressure plate 5 and the cone is easy to install and maintain, and the conical direction design (small end facing outward) makes the tension direction consistent with the self-locking direction of the cone surface, further improving the anchoring reliability; the conical direction is designed with the large end facing the anchor pressure plate 5, and the cone surface generates radial compression force under the action of tension, and the anchoring strength is enhanced through the mechanical wedge effect.

[0032] See also Figures 1 to 3 , Figure 5 , Figure 7Preferably, the anchor cone 4 is sleeved on the outer periphery of the anchor base 3, and a first locking bolt is provided between the anchor pressure plate 5 and the anchor cone 4; a second locking bolt is provided between the anchor pressure plate 5 and the anchor base 3, and the armored steel wire 17 of the cable is bent around the cone surface between the anchor cone 4 and the anchor base 3. The first locking bolt (cone and pressure plate) and the second locking bolt (pressure plate and base) form a multi-stage fixation to ensure the overall rigidity of the anchoring device and prevent loosening; the steel wire is bent around the cone surface to increase the contact area, and the tensile strength is improved in combination with the cone surface compression to prevent the steel wire from slipping.

[0033] See also Figures 1 to 3 , Figure 5 , Figure 7 Preferably, the stop flange 11 is composed of two semicircular positioning pieces, and the opposing surfaces of the two positioning pieces are provided with positioning grooves for passing the cables; the cylinder body of the connecting cylinder is provided with a glue injection port 12. The modular design of the two semicircular stop flanges 11 is convenient for on-site installation, and the positioning grooves accurately fix the cable position to prevent the cable from deviating and causing stress concentration.

[0034] See also Figures 1 to 5 , Figure 7 The side of the connecting flange 2 facing away from the connecting tube is connected to a bending limiter 1 of the cable; the stop flange 11 is provided with two, located at the left and right parts of the tube, respectively, to fix the cable on both sides. The bending limiter 1 limits the bending radius of the cable at the joint, avoids damage to the wire core 16 caused by excessive bending, and improves the ability to resist mechanical impact. The double stop flanges 11 are symmetrically arranged on the left and right sides to fix the cables, disperse the force, and enhance the anti-torsion and anti-tensile properties of the joint.

[0035] See also Figure 2 , Figure 7 , Figure 8 Preferably, the core 16 of the cable is twisted into an S shape during installation to allow for vibration. Figure 7 As shown in the figure, reserve a vibration margin to prevent damage to the 8 middle joints during transportation, handling and before on-site installation and gluing.

[0036] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 Preferably, the surface of the connecting tube is provided with a cylinder reinforcement rib 14. The outer surface of the cylinder is provided with a plurality of longitudinal and transverse reinforcement ribs 14. The cylinder reinforcement rib 14 improves the structural strength of the connecting tube, resists the high pressure and mechanical impact of the seabed, and prevents the cylinder from deforming and causing sealing failure.

[0037] See also Figure 1 , Figure 4 , Figure 6, preferably, the anode block 15 is locked to the cylinder body of the connecting cylinder by fasteners 18, and the anode block 15 and the cylinder body of the connecting cylinder are also fixedly welded by full welding 19. The double fixation of the anode block 15 (fasteners 18 + full welding 19) ensures that the anode block 15 does not fall off under long-term seawater scouring and maintains a stable cathodic protection effect. The fastener is a screw.

[0038] Please refer to Figure 1 、 Figure 4 、 Figure 6 , preferably, a plurality of anode blocks 15 are arranged at intervals, and the anode blocks 15 are aluminum-zinc-indium anode blocks 15; the outer surface of the cylinder body of the connecting cylinder is also coated with a high-solid epoxy coating. Aluminum-zinc-indium alloy anodes are suitable for high-salinity seawater environments; the high-solid epoxy coating provides a physical barrier, and the double anti-corrosion system significantly improves the anti-corrosion performance. The metal shell is made of SS316L stainless steel, and the anode block 15 (Al-Zn-In) (complies with the national standard GB / T 4948-2002 "Sacrificial Anodes of Aluminum-Zinc-Indium Series Alloys", with easy-to-obtain materials and excellent electrochemical performance in seawater environments).

[0039] Please refer to Figure 2 、 Figures 7 to 10 , preferably, the intermediate joint 8 is a cold-shrinkable intermediate joint (as shown in Figure 8 ), or the intermediate joint 8 is a lapped intermediate joint (as shown in Figure 9 ); a plurality of lifting rings 13 are provided on the outer surface of the connecting cylinder. The cold-shrinkable / lapped intermediate joint 8 is optional and compatible with different scenario requirements: the cold-shrinkable type is for quick installation, and the lapped type is suitable for complex working conditions, improving the applicability of the joint. The design of the lifting rings 13 facilitates the hoisting operation during deep-sea construction, reducing the installation difficulty and risk. Installation of the intermediate joint 8: For prefabricated / cold-shrinkable intermediate joints (as shown in Figure 8 ), strip the outer sheath 201 of the cable and the lead sheath 202 of the cable to expose a certain length of conductor, connect the cable conductor 208 by the compression method with the connecting pipe 207, then install the prefabricated / cold-shrinkable insulation stress cone (the intermediate joint main body 210 including the cable insulation 209), then install the copper shell 205, pour the cable sealant 206, put on the heat-shrinkable tube 204 and heat it for heat-shrinkage reinforcement and sealing, and finally lead seal 203, wind the sealing waterproof tape and PVC tape. For lapped intermediate joints (as shown in Figure 9As shown, strip the wire core to expose a certain length of conductor, connect the conductor by means of the crimping fitting 303, then wind the semi-conductive tape 302 and wrap the insulating tape 304, then wrap the semi-conductive tape 302 and the stress control tape 306, put on the copper mesh sleeve 305, wind the copper braided wire 311, install the constant force spring 307 for fixation, put on the heat shrinkable sleeve 301 and heat it for heat shrinkage reinforcement and sealing, and finally wrap the waterproof insulating tape 308, the sealant 309 and the PVC tape 310. The intermediate joint is placed in the connecting cylinder. Install half of the stop flange 11 at the bottom of the connecting cylinder and then install the other half of the flange, lock it firmly, fix the submarine cable core so that it is firmly fixed to the connecting cylinder to ensure that the internal intermediate joint will not be damaged during transportation. For the connection of optical fibers (as Figure 10 shown), after the optical fiber unit performs the optical fiber fusion splicing operation, it is placed in the optical cable joint box 9; after the optical fiber fusion splicing is completed, it is protected by the optical fiber heat shrinkable tube 405 and placed in the fiber optic splice tray 404. The fiber optic splice tray is locked in the optical cable joint box body 401 with the first screw 409. The stainless steel tube of the optical cable is connected by the grounding wire 406 and fixed with the spring buckle 407. The main optical cable is locked on the optical cable joint box body 401 through the sealed waterproof gland 408. Place the sealed O-ring 403, cover the optical cable joint box cover 402, lock it with the second screw 410, and then tie it together with the high-strength glass fiber tape and the intermediate joint 8 to ensure the normal operation of the optical cable.

[0040] The working principle of the present invention is as follows: The submarine cable armor wire 17 is firmly installed through the anchoring base 3, the anchoring cone 4 and the anchoring pressing plate 5, and is firmly installed together with the connecting cylinder through the connecting flange 2; the cone-type wire pressing and anchoring structure improves the flat pressing to cone pressing. In the case of large tensile force, the wire will be tightened more and more and will not slip off, thus avoiding joint damage and being not easy to loosen and slip off.

[0041] Weld the reinforcing rib 14 on the connecting cylinder to increase the strength of the connecting cylinder. Add the stop flange 11 at both ends inside the connecting cylinder for reinforcement. When installing the wire core 16, twist it slightly into an S shape with a small amplitude to reserve the vibration margin to prevent damage to the intermediate joint 8 during transportation, handling and before pouring glue on site; install the sacrificial anode block 15 on the connecting cylinder, first fasten it with screws, and then fully weld it on the connecting cylinder to ensure that it does not fall off; in seawater, the aluminum-zinc-indium anode gradually consumes as the current flows out, thereby reducing the corrosion loss of the shell as the cathode and greatly improving the corrosion resistance of the shell. In addition to the sacrificial anode, the surface of the connecting cylinder is coated with a high-solid epoxy coating to further improve the corrosion resistance of the shell.

[0042] Bend the armor steel wire 17 of the cable core 16 and thread it through between the guide anchoring base 3 and the anchoring cone, then connect the anchoring pressure plate 5 between the anchoring base 3 and the anchoring cone to lock and fix the armor steel wire 17, that is, complete the fixation of the cable to the connecting cylinder. Connect the cable core 16 with the intermediate joint 8, splice the optical fibers well, then align and insert the cable core 16 into the stop flange 11, place the optical cable joint box 9 into the connecting cylinder and twist the core 16 slightly into an S shape. After that, butt-connect and fix the two halves of the connecting cylinder to complete the installation of the housing of the connecting cylinder. Then, pour the insulating and sealing glue 10 into the interior of the barrel through the glue filling port 12 to play the role of insulation, waterproofing and sealing.

[0043] It should be noted that: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", "linkage" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change.

[0044] Second: In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments of the present disclosure are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0045] Finally, the above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention.

[0046] It should be pointed out that for those of ordinary skill in the art of this technology, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. An optical fiber composite submarine cable joint device, comprising a connecting tube, an optical cable joint box and an intermediate joint, and connecting flanges provided at both ends of the connecting tube, the cable passes through the connecting flange and is joined in the connecting tube by the intermediate joint, and the connecting tube is filled with insulating sealant, characterized in that: The connecting flange is provided with an anchoring device, which includes an anchoring base with a first conical connecting portion, and an anchoring locking piece installed on the anchoring base, wherein the anchoring locking piece has a second conical connecting portion, the first conical connecting portion cooperates with the second cone, and the cable is connected between the first conical connecting portion and the second conical connecting portion; a stopping flange is also provided in the connecting tube, and the cable passes through the stopping flange for positioning the cable; the optical cable junction box is provided in the connecting tube, and an anode block is provided on the outer surface of the connecting tube.

2. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The anchor locking member includes an anchor cone and an anchor pressure plate, the second conical connecting portion is arranged on the anchor cone, the anchor pressure plate is locked and connected to the anchor cone, the anchor base is located between the anchor cone and the anchor pressure plate, the small ends of the first conical connecting portion and the second conical connecting portion are away from the anchor pressure plate, and the large ends of the first conical connecting portion and the second conical connecting portion are facing the anchor pressure plate; the small end of the first conical connecting portion is facing the connecting flange.

3. The optical fiber composite submarine cable joint device according to claim 2, characterized in that: The anchor cone is sleeved on the outer circumference of the anchor base, and a first locking bolt is provided between the anchor pressure plate and the anchor cone; a second locking bolt is provided between the anchor pressure plate and the anchor base, and the armored steel wire of the cable is bent around the cone surface between the anchor cone and the anchor base.

4. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The stop flange is composed of two semicircular positioning pieces, and the opposite surfaces of the two positioning pieces are provided with positioning grooves for passing the cables; the cylinder body of the connecting cylinder is provided with a glue injection port.

5. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: A bending limiter of the cable is connected to the side of the connecting flange facing away from the connecting cylinder; two stop flanges are provided, which are respectively located at the left and right parts of the cylinder body to fix the cables on both sides.

6. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The core of the cable is twisted into an S shape during installation to allow for vibration.

7. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The surface of the connecting cylinder is provided with cylinder reinforcement ribs.

8. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The anode block is locked on the cylinder body of the connecting cylinder by a fastener, and the anode block and the cylinder body of the connecting cylinder are fixed by full welding.

9. The optical fiber composite submarine cable joint device according to claim 8, characterized in that: A plurality of anode blocks are arranged at intervals, and the anode blocks are aluminum-zinc-indium anode blocks; the outer surface of the connecting cylinder is also coated with high-solid epoxy paint.

10. The optical fiber composite submarine cable joint device according to claim 1, characterized in that: The intermediate joint is a cold shrink type intermediate joint, or the intermediate joint is a wrapping type intermediate joint; the outer surface of the connecting tube is provided with a plurality of lifting rings.

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