A composite submarine cable

Abstract

The present invention discloses a composite submarine cable, belonging to the field of submarine cable technology. The composite submarine cable includes an outer filling body, wherein the outer filling body is provided with a plurality of wrapping sleeves, the inner walls of the plurality of wrapping sleeves are each provided with a high-resistance layer; the inner walls of the plurality of high-resistance layers are each provided with an inner sheath assembly, the inner walls of the plurality of inner sheath assemblies are each provided with an aluminum alloy armor, and the plurality of aluminum alloy armors are each provided with an outer shield. The present invention, through the design of the inner sheath assembly and the aluminum alloy armor, when the submarine cable is subjected to external pressure, the outer pressure-resistant sleeve, the plurality of arched belts, and the inner pressure-resistant sleeve are used to resist the pressure. The plurality of arched belts can disperse and transmit the pressure, thereby improving its bearing capacity. When the outer sheath assembly is damaged, the aluminum alloy armor provides physical protection to prevent deformation due to external pressure, thereby extending the service life of the submarine cable and saving time for maintenance personnel, thus facilitating maintenance.

Description

Technical Field

[0001] The invention belongs to the technical field of submarine cables, and in particular relates to a composite submarine cable. Background Art

[0002] Submarine cables are cables laid on the seabed, primarily for power transmission and communications. They can be divided into two categories: power submarine cables, which transmit electricity and connect offshore facilities such as offshore wind farms and oil drilling platforms with the land power grid. They typically have multiple layers of insulation and protective layers to prevent water and mechanical damage; and communications submarine cables, which transmit data and communication signals. These cables, such as transoceanic fiber optic cables, contain optical fibers and protective layers and are designed for high-speed data transmission. Composite submarine cables, however, are submarine cables that integrate multiple functions to meet complex needs. These cables typically combine power transmission and communications functions and are suitable for different submarine applications. The design must fully consider the insulation, shielding, and mechanical protection of the different functional modules to ensure the cable's reliability in harsh submarine environments.

[0003] Existing composite submarine cables have a relatively simple structural design, typically using armor only on the outermost layer of the conductor for protection. During transportation or laying of the submarine cable, contact between the cable and raised seabed terrain may damage or deform the armor, which can affect the internal conductor components in the long term, thereby significantly reducing the service life of the submarine cable. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a composite submarine cable.

[0005] The technical solution adopted to solve the above technical problems is: a composite submarine cable, comprising an outer filling body, wherein a plurality of wrapping sleeves are arranged inside the outer filling body, and the inner walls of the plurality of wrapping sleeves are all provided with a high resistance layer;

[0006] The inner walls of the plurality of high-resistance layers are each provided with an inner protective layer assembly, the inner walls of the plurality of inner protective layer assemblies are each provided with an aluminum alloy armor, and the inner walls of the plurality of aluminum alloy armors are each provided with an outer shield;

[0007] The inner walls of the plurality of outer shields are each provided with an inner filling component, and the plurality of inner filling components are each provided with a main conductor component;

[0008] A control component is provided in the inner center of each of the plurality of main conductor components, and an outer wall of the outer filling body is covered with an outer protective layer component.

[0009] Furthermore, the outer filling body, the plurality of wrapping sleeves and the plurality of high-resistance layers are all made of polyethylene material, and the plurality of wrapping sleeves are coated on the outer walls of the corresponding high-resistance layers.

[0010] Through the above technical solution, the outer filling body can prevent the movement of multiple wrapping sleeves, which is helpful to the stability of the inner wall structure of the submarine cable. The wrapping sleeve provides protection for the outer wall of the high-resistance layer. The high-resistance layer can insulate its internal structure and prevent the current of the main conductor component from leaking to the outside. They are all made of polyethylene material and have good water resistance, electrical insulation and mechanical protection capabilities.

[0011] Furthermore, the inner protective layer assembly includes an inner pressure-resistant sleeve, the outer wall of the inner pressure-resistant sleeve is fixedly connected to a plurality of annularly distributed arched belts, the inner wall of the high-resistance layer is provided with an outer pressure-resistant sleeve, the inner pressure-resistant sleeve, the plurality of arched belts and the outer pressure-resistant sleeve are all made of EPDM rubber, the inner pressure-resistant sleeve is covered on the outer wall of the aluminum alloy armor, and the inner wall of the outer pressure-resistant sleeve is fixedly connected to the outer walls of the plurality of arched belts.

[0012] Through the above technical solution, when the outer pressure-resistant sleeve is subjected to external pressure, the outer pressure-resistant sleeve transfers the pressure to multiple arched belts, and the multiple arched belts disperse and transfer the pressure to improve its bearing capacity. Finally, it is supported by the inner pressure-resistant sleeve, thereby reducing the loss of internal parts of the submarine cable and preventing excessive pressure from causing deformation of the main conductor assembly. The inner pressure-resistant sleeve, multiple arched belts and outer pressure-resistant sleeve are all made of EPDM rubber, which has excellent elasticity and flexibility, can buffer external pressure, and has good water resistance. When the outer filling body, the wrapping sleeve and the high-resistance layer are damaged, the outer pressure-resistant sleeve is not easily corroded when in contact with seawater, thereby improving its service life and thereby increasing the time for staff to repair it.

[0013] Furthermore, the aluminum alloy armor is composed of a plurality of aluminum alloy wires and is wound around the outer wall of the outer shield.

[0014] Through the above technical solution, when the outer filling body, the wrapping sleeve and the high-resistance layer are damaged, the aluminum alloy armor provides the final protection for the main conductor assembly. When the submarine cable is transported and laid on the seabed, the aluminum alloy armor provides it with physical protection to prevent it from being deformed by external pressure. At the same time, the aluminum alloy armor is composed of multiple aluminum alloy wires and is light in weight, which makes it more convenient to transport and lay the submarine cable on the seabed, greatly reducing the construction difficulty and cost.

[0015] Furthermore, the inner filling component includes outer arc-shaped sleeves respectively arranged on the inner walls of multiple outer shieldings, multiple first inner cavities are opened in the multiple outer arc-shaped sleeves, multiple first inner cavities are fixedly connected with support bevels, multiple outer walls of the outer arc-shaped sleeves are fixedly connected with support belts, an inner arc-shaped sleeve is fixedly connected between each two ends of the support belts away from the outer arc-shaped sleeves, multiple second inner cavities are opened in the multiple inner arc-shaped sleeves, an inner filling body is fixedly connected between each two support belts, and multiple first circular holes are opened in the inner filling body.

[0016] Through the above technical solution, the outer arc sleeve effectively resists the pressure exerted by the outer shield, and transfers the pressure to multiple supporting bevels and two supporting belts, thereby evenly dispersing it. At the same time, the three outer arc sleeves are combined to form a circle, which greatly improves the overall structural stability. The inner arc sleeve provides protection for the control component, and multiple first inner cavities and first circular holes are provided to reduce the overall weight and facilitate the transportation and laying of the submarine cable.

[0017] Furthermore, one of the outer arc-shaped sleeves and the corresponding two support belts and the inner arc-shaped sleeve is designed as an integrated structure, and the multiple inner filling bodies are located between the corresponding outer arc-shaped sleeves and the inner arc-shaped sleeves.

[0018] Through the above technical solution, the outer arc sleeve, two support belts and inner arc sleeve are fan-shaped, and an inner filling body is provided inside, which can effectively disperse the pressure concentrated on a certain point on the outer wall of the outer arc sleeve, thereby improving the overall stability.

[0019] Furthermore, the main conductor assembly includes multiple main core conductors, the outer walls of the multiple main core conductors are covered with main conductor shielding, the outer walls of the multiple main conductor shieldings are covered with main conductor insulation, and the multiple main conductor insulations are respectively arranged in the corresponding inner filling body.

[0020] Through the above technical solution, multiple main line core conductors are all copper cores with excellent electrical conductivity, which can effectively transmit current and reduce energy loss. The main conductor shielding layer can effectively block external electromagnetic interference and maintain signal stability and clarity. The main conductor insulation prevents current from leaking from the main line core conductor to the external environment, ensuring that the current flows along the correct path. At the same time, it provides physical protection for the main line core conductor to resist physical damage in the marine environment.

[0021] Furthermore, the control component includes a cushion layer, the outer wall of the cushion layer is tightly fitted with the inner walls of the corresponding multiple inner arc-shaped sleeves, the inner wall of the cushion layer is provided with a filling sleeve, a plurality of second circular holes are opened in the filling sleeve, and a plurality of control core conductors are provided in the center of the filling sleeve, the outer walls of the multiple control core conductors are all covered with control conductor shields, the outer walls of the multiple control conductor shields are all covered with control conductor insulation, and the multiple control conductor insulations are all arranged in the filling sleeve.

[0022] Through the above technical solution, the cushion layer is further sealed and filled with a filling sleeve to prevent the control core conductor from deforming when the submarine cable is bent, and to enhance the overall strength and stability of the submarine cable. A plurality of second circular holes are provided to reduce its weight and facilitate transportation and laying. When the submarine cable is damaged, the control core conductor can quickly locate the damaged point, which helps the staff to quickly repair it. The control conductor is shielded from external electromagnetic influences and reduces interference with surrounding equipment. The control conductor insulation can reduce electromagnetic interference and ensure stable signal transmission.

[0023] Furthermore, the outer sheath assembly includes a wrapping tape arranged on the outer wall of the outer filling body, the outer wall of the wrapping tape is covered with an inner sheath, the outer wall of the inner sheath is provided with steel armor, the steel armor is composed of multiple galvanized steel wires and is wound around the outer wall of the inner sheath, the outer wall of the steel armor is covered with an outer sheath, the inner sheath and the outer sheath are both made of cross-linked polyethylene, and the outer wall of the outer sheath is provided with a spirally distributed color ribbon.

[0024] Through the above technical solution, when the submarine cable is damaged, it is first protected by the outer sheath to prevent it from external physical damage, mechanical impact and wear, and also prevent seawater penetration. The steel armor is wrapped around the outer wall of the inner sheath through multiple galvanized steel wires, which greatly enhances the pressure and impact resistance of the submarine cable, prevents rodent bites, and ensures long-term stable operation. The inner sheath prevents moisture and water intrusion and protects the inside of the submarine cable from moisture. Both the inner sheath and the outer sheath are made of cross-linked polyethylene, which has high chemical corrosion resistance and mechanical strength, greatly improving its service life in seawater. The color ribbon makes it convenient for the sea plow robot to identify the submarine cable and facilitate its laying.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention designs an inner sheath component and an aluminum alloy armor. When the submarine cable is subjected to external pressure, the outer pressure-resistant sleeve, multiple arched belts and the inner pressure-resistant sleeve are used to resist the pressure. The multiple arched belts can disperse and transmit the pressure, thereby improving its bearing capacity. When the outer sheath component is damaged, the aluminum alloy armor is used to provide physical protection to prevent deformation due to external pressure, thereby improving the service life of the submarine cable and increasing the maintenance time of the staff, which is conducive to convenient maintenance. (2) The present invention designs an inner filling component. When the overall protective layer of the submarine cable is damaged, the inner filling component can be used to protect each main conductor component, thereby improving its service life and protecting the core component from damage within a certain period of time. The staff can repair it before it is damaged, thereby greatly reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the overall appearance diagram of the present invention;

[0027] Figure 2 It is the overall front view of the present invention;

[0028] Figure 3 It is an overall side view of the present invention;

[0029] Figure 4 is a side view of the main conductor assembly of the present invention;

[0030] Figure 5 for Figure 4 A partial enlarged view of point A in the middle;

[0031] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0032] Figure 7 It is a schematic structural diagram of the main conductor component and control component of the present invention.

[0033] Reference numerals: 1, outer filling body; 2, wrapping sleeve; 3, high resistance layer; 4, inner protective layer assembly; 401, inner pressure-resistant sleeve; 402, arched belt; 403, outer pressure-resistant sleeve; 5, aluminum alloy armor; 6, outer shield; 7, inner filling assembly; 701, outer arc-shaped sleeve; 702, first inner cavity; 703, supporting oblique strip; 704, supporting belt; 705, inner arc-shaped sleeve; 706, second inner cavity; 707, inner filling body; 708, first circular hole; 8. Main conductor assembly; 801. Main core conductor; 802. Main conductor shield; 803. Main conductor insulation; 9. Control assembly; 901. Bedding layer; 902. Filling sleeve; 903. Second circular hole; 904. Control core conductor; 905. Control conductor shield; 906. Control conductor insulation; 10. Outer sheath assembly; 1001. Wrapping tape; 1002. Inner sheath; 1003. Steel armor; 1004. Outer sheath; 1005. Ribbon. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] like Figure 1-Figure 7 As shown, a composite submarine cable of this embodiment includes an outer filling body 1, a plurality of wrapping sleeves 2 are arranged in the outer filling body 1, and the inner walls of the plurality of wrapping sleeves 2 are provided with a high resistance layer 3. The outer filling body 1, the plurality of wrapping sleeves 2 and the plurality of high resistance layers 3 are all made of polyethylene material. The plurality of wrapping sleeves 2 are coated on the outer walls of the corresponding high resistance layers 3. The outer filling body 1 can prevent the plurality of wrapping sleeves 2 from moving, which contributes to the stability of the inner wall structure of the submarine cable. The wrapping sleeves 2 provide protection for the outer wall of the high resistance layer 3. The high resistance layer 3 can insulate its internal structure and prevent the current of the main conductor component 8 from leaking to the outside. They are all made of polyethylene material and have good water resistance, electrical insulation and mechanical protection capabilities.

[0036] like Figures 1-6As shown, the inner walls of the multiple high-resistance layers 3 are provided with an inner protective layer assembly 4, the inner protective layer assembly 4 includes an inner pressure-resistant sleeve 401, the outer wall of the inner pressure-resistant sleeve 401 is fixedly connected with a plurality of annularly distributed arched belts 402, the inner wall of the high-resistance layer 3 is provided with an outer pressure-resistant sleeve 403, the inner pressure-resistant sleeve 401, the plurality of arched belts 402 and the outer pressure-resistant sleeve 403 are all made of ethylene propylene rubber, the inner pressure-resistant sleeve 401 is coated on the outer wall of the aluminum alloy armor 5, the inner wall of the outer pressure-resistant sleeve 403 is fixedly connected to the outer wall of the plurality of arched belts 402, when the outer pressure-resistant sleeve 403 is subjected to external pressure, the outer pressure-resistant sleeve 403 transfers the pressure to the plurality of arched belts 402, Multiple arched belts 402 disperse and transmit pressure to improve its bearing capacity, and finally support it through the inner pressure-resistant sleeve 401, thereby reducing the loss of internal parts of the submarine cable and preventing excessive pressure from causing deformation of the main conductor assembly 8. The inner pressure-resistant sleeve 401, multiple arched belts 402 and outer pressure-resistant sleeve 403 are all made of EPDM rubber, which has excellent elasticity and flexibility, can buffer external pressure, and has good water resistance. When the outer filling body 1, the wrapping sleeve 2 and the high-resistance layer 3 are damaged, the outer pressure-resistant sleeve 403 is not easily corroded by contact with seawater, which increases its service life and thereby increases the time for staff to repair it.

[0037] like Figures 1-6 As shown, the inner walls of multiple inner sheath components 4 are provided with aluminum alloy armor 5, and the multiple aluminum alloy armors 5 are provided with outer shielding 6. The aluminum alloy armor 5 is composed of multiple aluminum alloy wires and is wound around the outer wall of the outer shielding 6. When the outer filling body 1, the wrapping sleeve 2 and the high resistance layer 3 are damaged, the aluminum alloy armor 5 provides the final protection for the main conductor component 8. When the submarine cable is transported and laid on the seabed, the aluminum alloy armor 5 provides it with physical protection to prevent it from being deformed by external pressure. At the same time, the aluminum alloy armor 5 is composed of multiple aluminum alloy wires and is light in weight, which makes it more convenient to transport and lay the submarine cable on the seabed, greatly reducing the construction difficulty and cost.

[0038] like Figure 1-Figure 7As shown, the inner walls of the multiple outer shields 6 are provided with inner filling components 7, and the inner filling components 7 include multiple outer arc-shaped sleeves 701 arranged on the inner wall of the outer shield 6, multiple first inner cavities 702 are opened in the multiple outer arc-shaped sleeves 701, and multiple first inner cavities 702 are fixedly connected with support bevels 703, and support belts 704 are fixedly connected on both sides of the outer walls of the multiple outer arc-shaped sleeves 701, and an inner arc-shaped sleeve 705 is fixedly connected between the ends of each two support belts 704 away from the outer arc-shaped sleeve 701, and multiple second inner cavities 706 are opened in the multiple inner arc-shaped sleeves 705, and an inner filling body 707 is fixedly connected between each two support belts 704, and multiple first circular holes 708 are opened in the inner filling body 707. The outer arc-shaped sleeve 701 effectively resists the pressure applied by the outer shield 6 and transmits the pressure to the multiple support bevels 703 and two support belts 704, and then evenly disperse them. At the same time, the three outer arc-shaped sleeves 701 are combined into a circle, which greatly improves the stability of the overall structure. The inner arc-shaped sleeve 705 provides protection for the control component 9. A plurality of first inner cavities 702 and first circular holes 708 are provided to reduce the overall weight and facilitate the transportation and laying of the submarine cable. One of the outer arc-shaped sleeves 701 and the corresponding two support belts 704 and the inner arc-shaped sleeve 705 is an integrated structure design, and a plurality of inner filling bodies 707 are located between the corresponding outer arc-shaped sleeves 701 and the inner arc-shaped sleeve 705, so that the outer arc-shaped sleeve 701, the two support belts 704 and the inner arc-shaped sleeve 705 are fan-shaped, and an inner filling body 707 is provided inside, which can effectively disperse the pressure concentrated on a certain point on the outer wall of the outer arc-shaped sleeve 701, thereby improving the overall stability.

[0039] like Figure 1-Figure 7 As shown, a main conductor component 8 is provided in each of the multiple inner filling components 7. The main conductor component 8 includes a plurality of main core conductors 801. The outer walls of the multiple main core conductors 801 are covered with a main conductor shield 802. The outer walls of the multiple main conductor shields 802 are covered with a main conductor insulation 803. The multiple main conductor insulations 803 are respectively arranged in the corresponding inner filling body 707. The multiple main core conductors 801 are all copper cores with excellent electrical conductivity, which can effectively transmit current and reduce energy loss. The main conductor shield 802 can effectively block external electromagnetic interference and maintain signal stability and clarity. The main conductor insulation 803 prevents current from leaking from the main core conductor 801 to the external environment, ensuring that the current flows along the correct path. At the same time, it provides physical protection for the main core conductor 801 to resist physical damage in the marine environment.

[0040] like Figure 1-Figure 7As shown, the inner centers of the plurality of main conductor assemblies 8 are each provided with a control assembly 9, the control assembly 9 comprising a cushion layer 901, the outer wall of the cushion layer 901 being tightly fitted with the inner walls of the corresponding plurality of inner arc-shaped sleeves 705, the inner wall of the cushion layer 901 being provided with a filling sleeve 902, a plurality of second circular holes 903 being opened in the filling sleeve 902, a plurality of control core conductors 904 being provided at the center of the filling sleeve 902, the outer walls of the plurality of control core conductors 904 being covered with a control conductor shield 905, the outer walls of the plurality of control conductor shields 905 being covered with a control conductor insulation 906, and the plurality of control conductor insulation 906 being provided with a plurality of Placed in the filling sleeve 902, the cushion layer 901 is further sealed and filled with the filling sleeve 902 to prevent the control core conductor 904 from deforming when the submarine cable is bent, and to enhance the overall strength and stability of the submarine cable. A plurality of second circular holes 903 are provided to reduce its weight and facilitate transportation and laying. When the submarine cable is damaged, the control core conductor 904 can quickly locate the damaged point, which helps the staff to quickly repair it. The control conductor shielding 905 is protected from external electromagnetic influences and reduces interference with surrounding equipment. The control conductor insulation 906 can reduce electromagnetic interference and ensure stable signal transmission.

[0041] like Figure 1-Figure 3 As shown, the outer wall of the outer filling body 1 is covered with an outer sheath assembly 10, and the outer sheath assembly 10 includes a tape 1001 arranged on the outer wall of the outer filling body 1, and the outer wall of the tape 1001 is covered with an inner sheath 1002, and the outer wall of the inner sheath 1002 is provided with a steel armor 1003, which is composed of a plurality of galvanized steel wires and is wound around the outer wall of the inner sheath 1002, and the outer wall of the steel armor 1003 is covered with an outer sheath 1004, and the inner sheath 1002 and the outer sheath 1004 are both made of cross-linked polyethylene, and the outer wall of the outer sheath 1004 is provided with a spirally distributed ribbon 1005. When the submarine cable is damaged, the outer sheath is firstly passed through 1004 protects it from external physical damage, mechanical shock and wear, and also prevents seawater penetration. The steel armor 1003 is a plurality of galvanized steel wires wrapped around the outer wall of the inner sheath 1002, which greatly enhances the pressure and impact resistance of the submarine cable, prevents rodent bites, and ensures long-term stable operation. The inner sheath 1002 prevents moisture and water intrusion, protecting the interior of the submarine cable from moisture. The inner sheath 1002 and the outer sheath 1004 are both made of cross-linked polyethylene, which has high chemical corrosion resistance and mechanical strength, greatly improving its service life in seawater. The ribbon 1005 facilitates the sea plow robot to identify the submarine cable and facilitate its laying.

[0042] The working principle of this embodiment is as follows: the submarine cable is first protected by the outer sheath assembly 10. When the submarine cable is damaged during transportation and laying, it is first protected by the outer sheath 1004. When the outer sheath 1004 is damaged, it is then protected by the steel armor 1003. The steel armor 1003 is composed of multiple galvanized steel wires and is wrapped around the outer wall of the inner sheath 1002, enhancing the pressure and impact resistance and preventing rodent bites. When the steel armor 1003 is damaged, it is protected by the inner sheath 1002. The outer sheath assembly 10 protects the outer filling body 1 from damage.

[0043] At the same time, when the external pressure is transmitted to the outer filling body 1, the wrapping sleeve 2 and the high resistance layer 3 in sequence, the outer filling body 1, the wrapping sleeve 2 and the high resistance layer 3 are all made of polyethylene material, which has good water resistance, electrical insulation and mechanical protection capabilities, thereby reducing the external pressure and reducing damage to the main conductor assembly 8;

[0044] When external pressure is transmitted to the outer pressure-resistant sleeve 403, the outer pressure-resistant sleeve 403 transmits the pressure to the multiple arched belts 402. The multiple arched belts 402 disperse and transmit the pressure, thereby improving its bearing capacity. Finally, the pressure is supported by the inner pressure-resistant sleeve 401, thereby reducing damage to internal parts of the submarine cable and preventing deformation of the main conductor assembly 8 caused by excessive pressure.

[0045] When the outer filling body 1, the wrapping sleeve 2 and the high-resistance layer 3 are damaged, the aluminum alloy armor 5 provides the final protection for the main conductor assembly 8 to prevent deformation due to external pressure. The aluminum alloy armor 5 transfers a small part of the pressure to the outer shield 6, so that the outer arc sleeve 701 can effectively withstand the pressure and transfer the pressure to the multiple support strips 703 and two support belts 704, thereby evenly dissipating the pressure. At the same time, the inner arc sleeve 705 provides protection for the control assembly 9.

[0046] When the submarine cable is in use, the multiple main core conductors 801 are mainly responsible for transmitting power or data. When the submarine cable is damaged, the control core conductors 904 can quickly locate the damaged point, helping the staff to quickly repair it.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A composite submarine cable comprising an outer filling body (1), characterized in that: A plurality of wrapping sleeves (2) are provided inside the outer filling body (1), and the inner walls of the plurality of wrapping sleeves (2) are all provided with a high resistance layer (3); The inner walls of the plurality of high-resistance layers (3) are each provided with an inner protective layer assembly (4), the inner protective layer assembly (4) comprising an inner pressure-resistant sleeve (401), the outer wall of the inner pressure-resistant sleeve (401) being fixedly connected with a plurality of annularly distributed arched belts (402), the inner wall of the high-resistance layer (3) being provided with an outer pressure-resistant sleeve (403), the inner pressure-resistant sleeve (401), the plurality of arched belts (402) and the outer pressure-resistant sleeve (403) being all made of EPDM rubber, the inner pressure-resistant sleeve (401) being coated on the outer wall of the aluminum alloy armor (5), the inner wall of the outer pressure-resistant sleeve (403) being fixedly connected with the outer walls of the plurality of arched belts (402), the inner walls of the plurality of inner protective layer assemblies (4) being provided with aluminum alloy armor (5), and the inner walls of the plurality of aluminum alloy armor (5) being provided with an outer shield (6); The inner walls of the plurality of outer shields (6) are each provided with an inner filling assembly (7), the inner filling assembly (7) comprising a plurality of outer arc-shaped sleeves (701) provided on the inner wall of the outer shield (6), a plurality of first inner cavities (702) being provided in the plurality of outer arc-shaped sleeves (701), a plurality of first inner cavities (702) being fixedly connected with support oblique strips (703), and a plurality of outer walls of the plurality of outer arc-shaped sleeves (701) being fixedly connected with support belts (704), and every two support belts (704) being away from the outer arc-shaped sleeves (701). An inner arc-shaped sleeve (705) is fixedly connected between one end of each of the support belts (704), and a plurality of second inner cavities (706) are provided in each of the plurality of inner arc-shaped sleeves (705). An inner filling body (707) is fixedly connected between each two of the support belts (704), and a plurality of first circular holes (708) are provided in each of the inner filling bodies (707). The plurality of inner filling bodies (707) are located between the corresponding outer arc-shaped sleeves (701) and the inner arc-shaped sleeves (705), and a main conductor assembly (8) is provided in each of the plurality of inner filling assemblies (7); A control component (9) is provided in the inner center of each of the plurality of main conductor components (8), and an outer wall of the outer filling body (1) is covered with an outer protective layer component (10).

2. A composite submarine cable according to claim 1, characterized in that: The outer filling body (1), the plurality of wrapping sleeves (2) and the plurality of high-resistance layers (3) are all made of polyethylene material, and the plurality of wrapping sleeves (2) are coated on the outer walls of the corresponding high-resistance layers (3).

3. A composite submarine cable according to claim 1, characterized in that: The aluminum alloy armor (5) is composed of a plurality of aluminum alloy wires and is wound around the outer wall of the outer shield (6).

4. A composite submarine cable according to claim 1, characterized in that: One of the outer arc-shaped sleeves (701) and the corresponding two support belts (704) and the inner arc-shaped sleeve (705) are designed as an integrated structure.

5. The composite submarine cable according to claim 1, characterized in that: The main conductor assembly (8) includes a plurality of main core conductors (801), the outer walls of the plurality of main core conductors (801) are each covered with a main conductor shield (802), the outer walls of the plurality of main conductor shields (802) are each covered with a main conductor insulation (803), and the plurality of main conductor insulations (803) are respectively arranged in corresponding inner filling bodies (707).

6. The composite submarine cable according to claim 1, characterized in that: The control component (9) comprises a cushion layer (901), the outer wall of the cushion layer (901) is tightly fitted with the inner walls of the corresponding multiple inner arc-shaped sleeves (705), the inner wall of the cushion layer (901) is provided with a filling sleeve (902), the filling sleeve (902) is provided with multiple second circular holes (903), the center of the filling sleeve (902) is provided with multiple control core conductors (904), the outer walls of the multiple control core conductors (904) are all covered with a control conductor shield (905), the outer walls of the multiple control conductor shields (905) are all covered with a control conductor insulation (906), and the multiple control conductor insulation (906) are all arranged in the filling sleeve (902).

7. The composite submarine cable according to claim 1, characterized in that: The outer sheath assembly (10) comprises a wrapping tape (1001) arranged on the outer wall of the outer filling body (1); the outer wall of the wrapping tape (1001) is covered with an inner sheath (1002); the outer wall of the inner sheath (1002) is provided with a steel armor (1003); the steel armor (1003) is composed of a plurality of galvanized steel wires and is wound around the outer wall of the inner sheath (1002); the outer wall of the steel armor (1003) is covered with an outer sheath (1004); the inner sheath (1002) and the outer sheath (1004) are both made of cross-linked polyethylene; and the outer wall of the outer sheath (1004) is provided with a spirally distributed color ribbon (1005).

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