Optical fiber composite submarine cable joint device

Abstract

The utility model provides an optical fiber composite submarine cable joint device, which comprises a connecting cylinder, an optical cable joint box, an intermediate joint and connecting flanges arranged at two ends of the connecting cylinder, the connecting flanges are provided with anchoring devices, and each anchoring device comprises an anchoring base with a first conical connecting part and an anchoring locking piece arranged 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 utility model relates to the technical field of submarine cable construction, especially an optical fiber composite submarine cable joint device. BACKGROUND

[0002] A submarine cable is a cable system used for transmitting 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 require various resources such as power, communication, fresh water, oil and gas, and various submarine cables need to be laid. Since multiple submarine cables are connected or due to the activities of marine animals, fishing nets, anchors and other reasons, the submarine cable may be broken or malfunctioned, and a submarine cable joint is needed to connect the submarine cable to ensure normal operation of the submarine cable. At present, the connection of the submarine cable often uses a soft joint (also known as a factory joint), and the form of the submarine cable repair joint is a middle joint, an optical cable joint box and a metal waterproof protective shell. The middle joint serves to connect the cable, and among them, the precast / cold shrink type and the wrapped type middle joint are widely used in the connection of submarine cables; the optical cable joint box is used to place the optical fiber unit after the fiber fusion operation to ensure normal operation of the optical cable; and the metal waterproof protective shell serves as a mechanical protection, and the shell is filled with insulating waterproof sealant to achieve the effect of insulating waterproof sealing. However, the existing repair joint has the following technical problems: 1. The two end steel wires are anchored by a flange plate flat steel wire anchoring device, and the steel wire is pressed tightly by a pressing plate to anchor the steel wire. Under small tension, it can be applied, but under large tension, the steel wire may not be pressed tightly, resulting in steel wire slipping and losing the steel wire anchoring effect, causing damage to the joint.

[0003] 2. The submarine cable core is in a suspended and unfixed state inside the metal shell, and is prone to damage at the middle joint during transportation, handling and before on-site installation and glue filling.

[0004] 3. The shell is prone to corrosion under long-term immersion in seawater, which affects the mechanical protection performance of the joint, and is more prone to breakage, malfunction and damage of the joint under the action of marine animal activity, fishing net, anchor or other reasons. INVENTION CONTENTS

[0005] To solve the above problems, the utility model aims to provide an optical fiber composite submarine cable joint device.

[0006] The utility model discloses the following method is used to realize: a kind of optical fiber composite submarine cable joint device, including connecting cylinder, cable joint box and intermediate joint, and the connecting flange being equipped with in the both ends of connecting cylinder, cable is connected in the connecting cylinder by the intermediate joint of the connecting flange, the connecting cylinder is filled with insulating sealant, the connecting flange is equipped with anchoring device, the anchoring device includes the anchoring base with first taper connection part, and anchoring locking piece is installed on the anchoring base, the anchoring locking piece has second taper connection part, the first taper connection part is matched with the second taper, cable is connected between the first taper connection part and the second taper connection part;The connecting cylinder is also equipped with stop flange, cable is penetrated by the stop flange, for positioning cable;The cable joint box is equipped in the connecting cylinder, and the outer surface of the connecting cylinder is equipped with anode block.

[0007] Preferably, the anchoring locking piece includes an anchoring cone and an anchoring press plate, the second taper connection part is provided on the anchoring cone, the anchoring press plate is locked and connected with the anchoring cone, the anchoring base is located between the anchoring cone and the anchoring press plate, the small end of the first taper connection part and the second taper connection part is away from the anchoring press plate, and the large end of the first taper connection part and the second taper connection part is towards the anchoring press plate; the small end of the first taper connection part is towards the connecting flange.

[0008] Preferably, the anchoring cone is sleeved on the outer periphery of the anchoring base, and the first locking bolt is arranged between the anchoring press plate and the anchoring cone; the second locking bolt is arranged between the anchoring press plate and the anchoring base, and the armored steel wire of the cable is wound to the cone surface between the anchoring cone and the anchoring base.

[0009] Preferably, the stop flange is composed of two half-circular positioning pieces, and the opposite surfaces of the two positioning pieces are provided with positioning grooves for penetrating the cable; the barrel of the connecting cylinder is provided with a glue pouring port.

[0010] Preferably, the connecting flange is connected with a cable bending limiter on the side away from the connecting cylinder; the stop flange is provided with two stop flanges respectively located in the left part and the right part in the barrel, and the cable is fixed on both sides.

[0011] Preferably, the part of the cable core in the connecting barrel is twisted into an S shape, leaving a vibration allowance.

[0012] Preferably, the connecting cylinder is provided with barrel reinforcing ribs on the surface.

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

[0014] Preferably, the anode block is locked on the barrel of the connecting cylinder by fasteners, and the anode block and the barrel of the connecting cylinder are also fixed by full welding.

[0015] Preferably, a plurality of anode blocks are arranged at intervals, the anode blocks are aluminum-zinc-indium anode blocks, and the outer surface of the barrel of the connecting cylinder is further coated with high-solid epoxy paint.

[0016] Preferably, the intermediate joint is a cold shrinkage type intermediate joint, or the intermediate joint is a wrap-around type intermediate joint, and the outer surface of the connecting cylinder is provided with a plurality of lifting rings.

[0017] The utility model discloses a kind of optical fiber composite submarine cable joint devices, compared with prior art, the utility model at least has following technical effects: 1. by the cooperation of first tapered connecting part and second tapered connecting part, under the action of tension, taper surface generates self-locking effect, increase anchoring contact area and friction, prevent steel wire from slipping, improve reliability under large tension scene;Stop flange fixes cable core position, avoid the damage of internal structure of joint due to cable core suspended swing in the process of transportation, installation, improve the mechanical stability of joint;Optical cable joint box is integrated in connecting cylinder, reduce the influence of external impact on optical fiber;Anode block delays seawater corrosion of metal shell by sacrificial anode protection method, prolongs the service life of joint.2.Anchoring pressing plate and tapered cylinder are designed as split structure, and split structure is convenient to install and maintain, tapered direction design (small end outward) makes tension direction consistent with taper surface self-locking direction (the direction of extrusion compression is also towards connecting cylinder outside), further improves anchoring reliability;Tapered direction design is large end towards anchoring pressing plate, under the action of tension, taper surface generates radial compression force, and anchoring strength is enhanced by mechanical wedge effect.3.First locking bolt (tapered cylinder and pressing plate) and second locking bolt (pressing plate and base) form multi-stage fixing, ensure the overall rigidity of anchoring device, prevent loosening;Steel wire is bent to tapered cylinder surface to increase contact area, and combined with taper surface compression to improve tensile strength, avoid steel wire slip.4.Two half circular stop flange modules are designed as modular design, which is convenient for on-site installation, and positioning groove accurately fixes cable position to prevent cable deviation and cause stress concentration.5.Cable core is twisted into S shape in a small range during installation, and vibration allowance is reserved to prevent damage to intermediate joint during transportation, handling and before on-site installation and glue filling.6.Barrel reinforcing rib improves the structural strength of connecting cylinder, resists high pressure and mechanical impact of seabed, and prevents deformation of barrel to cause sealing failure.7.Aluminum-zinc-indium alloy anode is suitable for high salinity seawater environment;High-solid epoxy paint provides physical barrier, and double anticorrosion system significantly improves corrosion resistance. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a first appearance view of the utility model of a kind of optical fiber composite submarine cable joint device.

[0019] Figure 2 is a first cross section schematic view of the optical fiber composite submarine cable joint device.

[0020] Figure 3 is a second cross section schematic view of the optical fiber composite submarine cable joint device.

[0021] Figure 4 is a first appearance schematic view of the optical fiber composite submarine cable joint device.

[0022] Figure 5 is a structure schematic view of the cone type anchoring device of the optical fiber composite submarine cable joint device.

[0023] Figure 6 is a local enlarged schematic view of the installation anode block of the optical fiber composite submarine cable joint device.

[0024] Figure 7 is a connection state schematic view of the small amplitude torsion of the wire core into S type of the optical fiber composite submarine cable joint device.

[0025] Figure 8 is a cold shrink type intermediate joint schematic view of the optical fiber composite submarine cable joint device.

[0026] Figure 9 is a wrapping type intermediate joint schematic view of the optical fiber composite submarine cable joint device.

[0027] Figure 10 is a cross section schematic view of the optical cable joint box of the optical fiber composite submarine cable joint device.

[0028] Explanation of reference numerals: 1, bending limiter; 2, connecting flange; 3, anchoring base; 4, anchoring cone cylinder; 5, anchoring pressing plate; 6, cone cylinder part; 7, straight cylinder part; 8, intermediate joint; 9, optical cable joint box; 10, insulating sealing glue; 11, stop flange; 12, glue pouring port; 13, lifting ring; 14, reinforcing rib; 15, anode block; 16, wire core; 17, armored steel wire; 18, fastener; 19, full welding; 201, cable single-phase outer sheath; 202, cable lead sheath; 203, lead seal; 204, heat shrink tube; 205, copper housing; 206, cable sealing glue; 207, connecting pipe; 208, cable conductor; 209, cable insulation; 210, intermediate joint main body; 301, heat shrink sleeve; 203, semi-conductive adhesive tape; 303, pressure contact fitting; 304, insulating adhesive tape; 305, copper mesh sleeve; 306, stress control tape; 307, constant force spring; 308, waterproof insulating adhesive tape; 309, sealing mastic; 310, PVC adhesive tape; 311, copper braided wire; 401, optical cable joint box body; 402, optical cable joint box cover; 403, O-ring; 404, fiber fusion disc; 405, optical fiber heat shrink tube; 406, grounding wire; 407, spring buckle; 408, sealing waterproof Luer cap; 409, first screw; 410, second screw. DETAILED DESCRIPTION

[0029] The utility model will be further explained in connection with the drawings and specific embodiments.

[0030] Please refer to Figures 1 to 10A kind of optical fiber composite submarine cable joint device, including connecting cylinder, optical cable joint box 9 and intermediate joint 8, and the connecting flange 2 being provided with at both ends of connecting cylinder, cable is connected in the connecting cylinder by the intermediate joint 8 in the connecting flange 2, the connecting cylinder is filled with insulating sealant 10, the connecting flange 2 is equipped with anchoring device, the anchoring device includes anchoring base 3 with first tapered connection part, and anchoring locking piece is installed on the anchoring base 3, the anchoring locking piece has second tapered connection part, the first tapered connection part is matched with the second tapered, cable is connected between the first tapered connection part and the second tapered connection part;The connecting cylinder is also equipped with stop flange 11, cable is penetrated through the stop flange 11, for positioning line cable;The optical cable joint box 9 is located in the connecting cylinder, the outer surface of the connecting cylinder is equipped with anode block 15.Connecting cylinder includes straight cylinder part 7 and connecting tapered cylinder part 6, straight cylinder part 7 is provided with the connecting tapered cylinder part 6 at both ends, the connecting flange 2 is fixed at the end of connecting tapered cylinder part 6 away from straight cylinder, and stop flange 11 is located at the junction of straight cylinder part 7 and connecting tapered cylinder part 6.By the cooperation of first tapered connection part and second tapered connection part, under the action of tension, the taper surface generates self-locking effect, increases anchoring contact area and friction, prevents steel wire from slipping, and improves reliability in high-tension scene;Stop flange 11 fixes the position of cable core 16, avoids the damage of internal structure of joint caused by the swinging of cable core 16 in the process of transportation and installation, and improves the mechanical stability of joint;Optical cable joint box 9 is integrated in connecting cylinder, reduces the influence of external impact on optical fiber;Anode block 15 delays the seawater corrosion of metal shell by sacrificial anode protection method, prolongs the service life of joint.

[0031] Please refer to Figures 1 to 3 , Figure 5 , Figure 7 Preferably, the anchoring locking piece includes anchoring tapered cylinder 4 and anchoring pressing plate 5, the second tapered connection part is provided on the anchoring tapered cylinder 4, the anchoring pressing plate 5 is locked and connected with the anchoring tapered cylinder 4, the anchoring base 3 is located between the anchoring tapered cylinder 4 and the anchoring pressing plate 5, the small end of the first tapered connection part and the second tapered connection part is away from the anchoring pressing plate 5, and the large end of the first tapered connection part and the second tapered connection part is towards the anchoring pressing plate 5;The small end of the first tapered connection part is towards the connecting flange 2.Anchoring pressing plate 5 and tapered cylinder are designed as separate structure, which is convenient for installation and maintenance, and the tapered direction design (small end outward) makes the tension direction consistent with the self-locking direction of taper surface, further improves the anchoring reliability;The tapered direction design is that the large end is towards the anchoring pressing plate 5, under the action of tension, the taper surface generates radial compression force, and the anchoring strength is enhanced by mechanical wedge effect.

[0032] Please refer to Figures 1 to 3 , Figure 5 , Figure 7Preferably, the anchoring cone 4 is sleeved on the outer periphery of the anchoring base 3, and the anchoring pressure plate 5 is provided with a first locking bolt between the anchoring cone 4 and the anchoring base 3; the anchoring pressure plate 5 is provided with a second locking bolt between the anchoring base 3, and the armored steel wire 17 of the cable is wound to the cone surface between the anchoring cone 4 and the anchoring base 3. The first locking bolt (cone and pressure plate) and the second locking bolt (pressure plate and base) form a multi-stage fixing, which ensures the overall rigidity of the anchoring device and prevents loosening; the steel wire is wound to the cone surface to increase the contact area, and the cone surface is pressed to improve the tensile strength, avoiding the sliding of the steel wire.

[0033] Please refer to Figures 1 to 3 , Figure 5 , Figure 7 Preferably, the stop flange 11 is composed of two half-circular positioning pieces, and the opposite surfaces of the two positioning pieces are provided with positioning grooves for passing through the cable; the barrel body of the connecting barrel is provided with a glue pouring port 12. The two half-circular stop flanges 11 are modularly designed to facilitate on-site installation, and the positioning grooves accurately fix the position of the cable to prevent stress concentration caused by cable deviation.

[0034] Please refer to Figures 1 to 5 , Figure 7 The connecting flange 2 is connected with the cable bending limiter 1 on the side away from the connecting barrel; the stop flange 11 is provided with two, respectively located in the left and right parts of the barrel body, and the cable is fixed on both sides. The bending limiter 1 limits the bending radius of the cable at the joint to avoid excessive bending and damage to the wire core 16, and improves the mechanical impact resistance. The double stop flanges 11 are symmetrically arranged on the left and right sides to fix the cable, disperse the stress, and enhance the joint anti-torsion and anti-stretching performance.

[0035] Please refer to Figure 2 , Figure 7 , Figure 8 Preferably, the cable wire core 16 is twisted into an S shape in the connecting barrel, leaving a shock allowance. The wire core 16 is slightly twisted into an S shape (as shown in Figure 7 ) during installation, leaving a shock allowance to prevent damage to the intermediate joint 8 during transportation, handling, and before on-site installation and glue pouring.

[0036] Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 Preferably, the connecting barrel surface is provided with barrel reinforcing ribs 14. The outer surface of the barrel body is provided with a plurality of longitudinal and transverse reinforcing ribs 14. The barrel reinforcing ribs 14 improve the structural strength of the connecting barrel, resist the high pressure of the seabed and mechanical impact, and prevent deformation of the barrel body from causing sealing failure.

[0037] Please refer to Figure 1 , Figure 4 ,Figure 6 Preferably, the anode block 15 is locked on the barrel of the connecting barrel by fasteners 18, and the anode block 15 and the barrel of the connecting barrel are also welded by full welding 19. The double fixation (fasteners 18 + full welding 19) of the anode block 15 ensures that the anode block 15 does not fall off under long-term seawater scouring, maintaining stable cathodic protection effect. The fasteners are screws.

[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 barrel of the connecting barrel is also coated with high-solid epoxy paint. Aluminum-zinc-indium alloy anodes are suitable for high-salinity seawater environments; high-solid epoxy paint provides a physical barrier, and the double corrosion prevention system significantly improves corrosion resistance. The metal shell is made of SS316L stainless steel, and the anode block 15 (Al-Zn-In) (in accordance with the national standard GB / T 4948-2002 "Aluminum-zinc-indium alloy sacrificial anode", the material is easy to obtain, and has excellent electrochemical performance in seawater environment).

[0039] Please refer to Figure 2 , Figures 7 to 10 Preferably, the intermediate joint 8 is a cold shrink type intermediate joint (as shown in Figure 8 ), or the intermediate joint 8 is a wrapping type intermediate joint (as shown in Figure 9 ); the outer surface of the connecting barrel is provided with a plurality of lifting rings 13. The cold shrink / wrapping type intermediate joint 8 can be selected to meet different scene requirements: cold shrink type for quick installation, wrapping type for complex working conditions, and improved joint applicability. The lifting ring 13 is designed to facilitate hoisting operation during deep sea construction, reducing installation difficulty and risk. Installing the intermediate joint 8: for the prefabricated / cold shrink type intermediate joint (as shown in Figure 8 ), the outer sheath 201 of the cable, the lead sleeve 202 of the cable, and a certain length of conductor are stripped, the cable conductor 208 is connected by crimping method using a connecting pipe 207, then the prefabricated / cold shrink type insulation stress cone (intermediate joint main body 210 containing cable insulation 209) is installed, then the copper shell 205 is installed, the cable sealant 206 is poured, the heat shrink tube 204 is heated and heat shrunk to reinforce and seal, and finally the lead seal 203 is wrapped with waterproof adhesive tape and PVC tape. Figure 9As shown), strip the conductor core to expose a certain length of conductor, connect the conductor using crimping fitting 303, then wrap with semi-conductive tape 302, then wrap with insulating tape 304, then wrap with semi-conductive tape 302 again, stress control tape 306, put on copper mesh sleeve 305, wrap with copper braided wire 311, install constant force spring 307 for fixation, put on heat shrink tubing 301 for heat shrinking reinforcement and sealing, and finally wrap with waterproof insulating tape 308, sealing putty 309, and PVC tape 310. The intermediate joint is placed inside the connecting cylinder, and half of the stop flange 11 is installed at the bottom of the connecting cylinder, and the other half of the flange is installed and locked firmly to fix the submarine cable core to the connecting cylinder, ensuring that the internal intermediate joint will not be damaged during transportation. For fiber optic connections (such as... Figure 10 As shown, after the fiber optic unit is spliced, it is placed in the fiber optic splice box 9. After the fiber optic splicing is completed, it is protected with fiber optic heat shrink tubing 405 and placed in the fusion splice tray 404. The fusion splice tray is locked in the fiber optic splice box body 401 with the first screw 409. The stainless steel tube of the fiber optic cable is connected with the grounding wire 406 and fixed with the spring buckle 407. The main fiber optic cable is locked on the fiber optic splice box body 401 through the sealed waterproof gland 408. The sealing O-ring 403 is placed on it, the fiber optic splice box cover 402 is closed, and it is locked with the second screw 410. Then, it is tied together with the intermediate joint 8 with high-strength fiberglass tape to ensure that the fiber optic cable can work normally.

[0040] The working principle of this utility model is as follows:

[0041] The submarine cable armored steel wire 17 is firmly installed through the anchoring base 3, the anchoring cone 4, and the anchoring pressure plate 5, and is fastened together with the connecting cylinder through the connecting flange 2; the cone-type steel wire compression anchoring structure improves the flat plate compression to cone compression, and the steel wire will become tighter and tighter under high tension and will not slip off, thereby avoiding joint damage and making it less prone to loosening and slippage.

[0042] The connecting cylinder is reinforced with welded reinforcing ribs 14 to increase its strength. Locking flanges 11 are added to both ends of the connecting cylinder for added strength. The conductor core 16 is slightly twisted into an S-shape during installation to allow for vibration and prevent damage to the intermediate joints 8 during transportation, handling, and on-site installation before gluing. Sacrificial anode blocks 15 are installed on the connecting cylinder, first secured with screws, and then fully welded to ensure they do not fall off. In seawater, the aluminum-zinc-indium anode is gradually consumed as the current flows out, thereby reducing corrosion loss of the cathode shell and greatly improving its corrosion resistance. In addition to the sacrificial anode, the surface of the connecting cylinder is coated with a high-solids epoxy coating to further enhance the shell's corrosion resistance.

[0043] The armored steel wire 17 of the cable core 16 is bent through the anchor base 3 and the anchor cone, and then locked and fixed by the anchor base 3 and the anchor cone connecting anchor pressing plate 5, that is, the fixing of the cable and the connecting barrel is completed, the cable core 16 is connected by the intermediate joint 8, the optical fiber is fused, then the cable core 16 is aligned and loaded into the stop flange 11, the optical cable joint box 9 is put into the connecting barrel and the core 16 is slightly twisted into S type, then the two halves of the connecting barrel are connected and fixed, so that the shell installation of the connecting barrel is completed, and then the insulating sealing glue 10 is poured into the barrel through the pouring port 12, so as to play the role of insulation and waterproof sealing.

[0044] It should be noted that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change.

[0045] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0046] Finally, the above-mentioned is only the preferred embodiment of the utility model, the protection scope of the utility model is not only limited to the above-mentioned embodiment, and all technical solutions under the idea of the utility model belong to the protection scope of the utility model.

[0047] It should be pointed out that for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principle of the utility model can also be considered as the protection scope of the utility model.

Claims

1. A fiber optic composite submarine cable joint device, comprising a connecting cylinder, a fiber optic cable joint box, and an intermediate joint, and connecting flanges at both ends of the connecting cylinder, wherein the cable passes through the connecting flanges into the connecting cylinder and is joined by the intermediate joint, and the connecting cylinder is filled with insulating sealant, characterized in that: The connecting flange is equipped with an anchoring device, which includes an anchoring base with a first tapered connecting portion and an anchoring locking member mounted on the anchoring base. The anchoring locking member has a second tapered connecting portion, and the first tapered connecting portion mates with the second tapered portion. A cable is connected between the first tapered connecting portion and the second tapered connecting portion. A stop flange is also provided in the connecting cylinder, through which the cable passes for positioning the cable. An optical cable connector box is provided in the connecting cylinder, and an anode block is provided on the outer surface of the connecting cylinder.

2. The fiber optic composite submarine cable connector device according to claim 1, characterized in that: The anchoring locking component includes an anchoring cone and an anchoring pressure plate. The second conical connecting portion is disposed on the anchoring cone. The anchoring pressure plate is locked to the anchoring cone. The anchoring base is located between the anchoring cone and the anchoring pressure plate. The small ends of the first and second conical connecting portions are away from the anchoring pressure plate, and the large ends of the first and second conical connecting portions face the anchoring pressure plate. The small end of the first conical connecting portion faces the connecting flange.

3. The fiber optic composite submarine cable joint device according to claim 2, characterized in that: 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 to the cone surface between the anchoring cone and the anchoring base.

4. The fiber optic composite submarine cable joint device according to claim 1, characterized in that: The stop flange is composed of two semi-circular positioning plates, and the opposing surfaces of the two positioning plates are provided with positioning grooves to allow cables to pass through; the connecting cylinder is provided with a glue-filling port.

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

6. The fiber optic composite submarine cable joint device according to claim 1, characterized in that: The cable core is twisted into an S-shape within the connecting drum to allow for vibration tolerance.

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

8. The fiber optic composite submarine cable joint device according to claim 1, characterized in that: The anode block is fastened to the cylinder body of the connecting cylinder by fasteners, and the anode block and the cylinder body of the connecting cylinder are also fixed by full welding.

9. The fiber optic composite submarine cable joint device according to claim 8, characterized in that: Multiple anode blocks are spaced apart, and the anode blocks are aluminum-zinc-indium anode blocks; the outer surface of the connecting cylinder is also coated with a high-solids epoxy coating.

10. The fiber optic composite submarine cable joint device according to claim 1, characterized in that: The intermediate joint is a cold-shrink intermediate joint, or the intermediate joint is a wrap-around intermediate joint; the outer surface of the connecting cylinder is provided with multiple lifting rings.

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