Dynamic and static combined submarine cable and manufacturing method thereof

Abstract

A dynamic and static combined submarine cable disclosed by the present invention comprises a dynamic cable and a static cable, the dynamic cable comprises a dynamic cable core, a dynamic filling steel strand and a dynamic armor layer, the static cable comprises a static cable core, a static filling strip and a static armor layer, the dynamic cable core is correspondingly connected with the static cable core, the dynamic filling steel strand is correspondingly connected with the static filling strip, and the static filling strip is correspondingly connected with the static armor layer. The dynamic armor layer is correspondingly connected with the static armor layer; the invention further discloses a forming method of the dynamic and static combined submarine cable, the dynamic cable and the static cable are formed, the steel strands are inserted into the filling strip connecting holes, the conductor core wires are welded, the dynamic steel strand PE sheaths are formed, the common filling strips are welded, the dynamic armored steel wires and the static armored steel wires which are opposite to each other are fixed, and the dynamic armored steel wires and the PE wires which are opposite to each other are fixed. And forming the outer sheath. According to the dynamic and static combined submarine cable and the forming method thereof, the dynamic cable and the static cable are independently formed and then assembled.

Description

Technical Field

[0001] The invention relates to the field of submarine cables, in particular to a dynamic and static combined submarine cable and a manufacturing method thereof. Background Art

[0002] With the continuous development of offshore resource development, the application of submarine cables is becoming more and more extensive. During the use of submarine cables, one end of the submarine cable will be connected to the floating body. The floating body will shift due to the fluctuation of sea level, ocean currents, and weather reasons, thus forming a dynamic cable at the section where the submarine cable is connected to the floating body, and a static cable at the section where the submarine cable is laid on the seabed.

[0003] Because dynamic cables need to overcome the impact of complex marine environment, dynamic cables have higher strength requirements than static cables. In order to ensure the safety of use, traditional submarine cables will form dynamic cables and static cables in one piece, thereby ensuring the safety of use of dynamic cables. However, the strength structure of dynamic cables applied to static cables will greatly increase the production cost of submarine cables, especially for long-distance submarine cables. The longer the laying length of the submarine cables, the higher the ineffective production cost. Alternatively, the submarine cables are formed in sections, that is, in the molding process of the submarine cables, the dynamic cable core and the static cable core are formed in one piece, and differentiated molding is used when molding the armor layer structure. For example, one or more layers of steel wire are twisted on the armor layer of the dynamic cable to increase the mechanical strength of the dynamic cable. However, the uniformity of the structure is poor, and the outer diameter of the dynamic cable is larger than that of the static cable. When the submarine cables are stored, if the dynamic cables are concentrated at one end of the storage tray, the center of gravity of the storage tray will be shifted, which will cause great safety hazards during the transportation and storage of the submarine cables. At the same time, during the laying process, because there is an obvious diameter difference at the boundary between the dynamic cable and the static cable, it is easy to be damaged by impact. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a dynamic-static combined submarine cable and a manufacturing method thereof, in which a dynamic cable and a static cable are independently formed and then assembled.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problems is: a dynamic-static combined submarine cable, comprising a main body, the main body comprising a dynamic cable and a static cable, the dynamic cable comprising a dynamic cable core, a dynamic filling steel strand and a dynamic armor layer, the static cable comprising a static cable core, a static filling strip and a static armor layer, the dynamic cable core is connected correspondingly to the static cable core, the dynamic cable core and the static cable core have the same structure, the dynamic filling steel strand is connected correspondingly to the static filling strip, the inner layer of the dynamic filling steel strand is a steel strand formed by twisting a plurality of wires into a bundle, the outer layer of the dynamic filling steel strand is a PE sheath of the dynamic steel strand, the static filling strip is made of PE material, the dynamic armor layer is connected correspondingly to the static armor layer, the dynamic armor layer is formed by twisting the dynamic armor steel wire, and the static armor layer is formed by twisting the static armor steel wire and the PE wire.

[0006] Compared with the prior art, the advantages of the present invention are: first, the dynamic cable and the static cable are both independently formed without interfering with each other, and the dynamic cable and the static cable have the same structural distribution. Compared with the static cable, the dynamic cable only has one more step of twisting and forming of the steel strands and one more step of forming the PE sheath of the dynamic steel strands, and the other processes are the same, and the same set of process equipment can be used, and only part of the forming materials need to be replaced, so the forming process is simple; secondly, because the dynamic cable and the static cable are independently formed, they can be separated and placed before being assembled into a submarine cable, so it is easier to transport and store, and there is no need to worry about the dynamic cable and the static cable being stored on the same storage tray, and the dynamic cable is concentrated at one end of the storage tray, causing uneven quality and eccentric center of gravity, and the safety hazard is small; at the same time, the wire diameter of the dynamic cable is the same as that of the static cable, and there is no obvious interface when laid on the seabed, so that the impact of ocean currents is small and it is not easy to be damaged.

[0007] As an improvement of the present invention, the dynamic cable core and the static cable core both include a conductor core wire, an inner shielding layer, an insulating layer, an outer shielding layer, a metal shielding layer, a semi-conductive buffer layer, a metal sheath layer and an inner sheath layer arranged from the inside to the outside, the conductor core wire comprises a plurality of copper wires twisted into a bundle, the conductor core wire of the dynamic cable core and the conductor core wire of the static cable core are connected by welding, and then an inner shielding layer, an insulating layer, an outer shielding layer, a metal shielding layer, a semi-conductive buffer layer, a metal sheath layer and an inner sheath layer are sequentially formed on the outer layer at the connection of the conductor core wires. Through the improvement, the connection between the dynamic cable core and the static cable core is realized, thereby ensuring the quality and safety of the use of the submarine cable.

[0008] As an improvement of the present invention, at one end of the dynamic cable close to the static cable, the steel strand is arranged to protrude from the PE sheath of the dynamic steel strand, and the end of the static filling strip close to the dynamic filling steel strand is provided with a filling strip connecting hole plugged into the steel strand. Through the improvement, due to the instability of the dynamic cable during the laying process, the dynamic cable and the static cable are prone to reciprocating bending at the connection point, which can easily cause the alignment offset between the dynamic cable and the static cable. Through the design of inserting the steel strand into the filling strip connecting hole, the alignment stability between the dynamic cable and the static cable after reciprocating bending can be guaranteed, thereby ensuring the quality and safety of the submarine cable.

[0009] As an improvement of the present invention, the wire diameter of the steel strand is equal to the hole diameter of the filling bar connecting hole. Before the steel strand is inserted into the filling bar connecting hole, the steel strand is first heated and inserted into the filling bar connecting hole without cooling down. Through the improvement, the steel strand can melt the static filling bar in contact with it, so that the steel strand can be better adhered to the static filling bar after being inserted into the filling bar connecting hole, thereby increasing the connection strength between the dynamic cable and the static cable.

[0010] As an improvement of the present invention, the dynamic armor layer is twisted with multiple layers of dynamic armor steel wires, and the static armor layer is twisted with multiple layers of static armor steel wires and PE wires. In the static armor layer, the static armor steel wires and PE wires of the same layer are alternately distributed. Through the improvement, the design of the multiple layers of dynamic armor steel wires on the dynamic armor layer is to ensure the service strength of the dynamic cable, and the static armor layer is twisted with multiple layers of static armor steel wires and PE wires to ensure the structural consistency of the dynamic cable armor layer and the static cable armor layer, thereby reducing the changes in the molding process equipment of the submarine cable, and also to facilitate the consistency of the wire diameter of the dynamic cable and the wire diameter of the static cable, and the static armor steel wires and PE wires of the same layer are alternately distributed to ensure the uniformity of the distribution of the static armor steel wires and PE wires in the static cable, and avoid eccentricity of the static cable.

[0011] As an improvement of the present invention, the dynamic armor steel wire, the static armor steel wire and the PE wire have equal wire diameters, the static armor steel wire is welded and fixed to the relative dynamic armor steel wire, and the PE wire is fixedly connected to the relative dynamic armor steel wire. Through the improvement, the structural consistency of the dynamic cable and the static cable is ensured by the design that the dynamic armor steel wire, the static armor steel wire and the PE wire have equal wire diameters, and the design that the PE wire is fixedly connected to the relative dynamic armor steel wire, combined with the design that the static armor steel wire and the PE wire of the same layer are alternately distributed, can ensure the distribution of the static armor steel wire and the relative dynamic armor steel wire offset each other, and at the same time can also increase the connection strength between the dynamic cable and the static cable, and further enhance the connection stability between the dynamic cable and the static cable.

[0012] As an improvement of the present invention, the PE wire and the dynamic armor steel wire are fixedly connected by a snap-fit ​​assembly, and the snap-fit ​​assembly includes a snap-fit ​​shaft arranged on the PE wire and a snap-fit ​​hole arranged on the dynamic armor steel wire. The outer diameter of the snap-fit ​​assembly is equal to the wire diameter of the dynamic armor steel wire. Through the improvement, the fixed connection between the PE wire and the relative dynamic armor steel wire is achieved, and at the same time, the deformation of the wire diameter of the connecting surface between the dynamic cable and the static cable caused by the design of the snap-fit ​​assembly is avoided.

[0013] As an improvement of the present invention, a plurality of elastic hooks bent radially are provided on the circumference of the insertion end of the snap-fit ​​shaft, and the axes of the plurality of elastic hooks are hollow. A plurality of snap-fit ​​connecting holes snap-fit ​​with the elastic hooks are provided on the circumference of the snap-fit ​​hole. Through the improvement, stable snap-fitting and fixing of the snap-fit ​​assembly is achieved, and the axes of the plurality of elastic hooks are hollow to ensure elastic contraction space of the elastic hooks.

[0014] A method for manufacturing a dynamic and static combined submarine cable is used to form a dynamic and static combined submarine cable, and the steps are as follows:

[0015] S1: Molded dynamic cable and static cable;

[0016] S2: Make the dynamic cable and the static cable close to each other, and make the dynamic cable core and the static cable core face each other, the dynamic filling steel strand and the static filling strip face each other, and the dynamic armor steel wire and the static armor steel wire and PE wire face each other;

[0017] S3: External dynamic armor wire, static armor wire, PE wire and ordinary filling strip;

[0018] S4: heating the steel strands in the dynamic filling steel strands, and before the steel strands cool down, bringing the dynamic cable and the static cable close to each other, inserting the steel strands into the filling bar connection hole until the dynamic cable core and the static cable core abut against each other;

[0019] S5: After the steel strands are cooled, the conductor core wires of the dynamic cable core and the conductor core wires of the static cable core are welded;

[0020] S6: The outer layer at the connection of the conductor core wire is covered with an inner shielding layer, an insulating layer, an outer shielding layer, a metal shielding layer, a semi-conductive buffer layer, a metal sheath layer and an inner sheath layer in sequence;

[0021] S7: PE sheath of dynamic steel strands on the outer layer of the steel strands between the formed dynamic cable and the static cable;

[0022] S8: Straighten and weld the common filler strip;

[0023] S9: Water-blocking tape coating;

[0024] S10: Straightening dynamic armor wire, static armor wire, PE wire;

[0025] S11: fix the relative dynamic armor steel wire and the static armor steel wire by spot welding, and fix the relative dynamic armor steel wire and the PE wire by plugging;

[0026] S12: Molded outer sheath.

[0027] Compared with the prior art, the advantages of the present invention are: first, the dynamic cable and the static cable are both independently formed without interfering with each other, and the dynamic cable and the static cable have the same structural distribution. Compared with the static cable, the dynamic cable only has one more step of twisting and forming of the steel strands and one more step of forming the PE sheath of the dynamic steel strands, and the other processes are the same, and the same set of process equipment can be used, and only part of the forming materials need to be replaced, so the forming process is simple; secondly, because the dynamic cable and the static cable are independently formed, they can be separated and placed before being assembled into a submarine cable, so it is easier to transport and store, and there is no need to worry about the dynamic cable and the static cable being stored on the same storage tray, and the dynamic cable is concentrated at one end of the storage tray, causing uneven quality and eccentric center of gravity, and the safety hazard is small; at the same time, the wire diameter of the dynamic cable is the same as that of the static cable, and there is no obvious interface when laid on the seabed, so that the impact of ocean currents is small and it is not easy to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the explosion structure of the dynamic cable and the static cable connected in the present invention.

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of the dynamic cable of the present invention.

[0030] Figure 3 It is a schematic diagram of the cross-sectional structure of the static cable of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of the dynamic armored steel wire of the present invention.

[0032] Figure 5 It is a schematic diagram of the structure of static armored steel wire and PE wire of the present invention.

[0033] Figure 6 It is a schematic diagram of the application structure of the present invention.

[0034] As shown in the figure: 1. dynamic cable, 1.1. dynamic cable core, 1.2. dynamic filled steel strand, 1.2.1. steel strand, 1.2.2. dynamic steel strand PE sheath, 1.3. dynamic armor layer, 1.3.1. dynamic armor steel wire, 2. static cable, 2.1. static cable core, 2.2. static filling strip, 2.2.1. filling strip connection hole, 2.3. static armor layer, 2.3.1. static armor steel wire, 2.3.2. PE wire, 3. conductor core wire, 4. inner shielding layer, 5. insulation layer, 6. outer shielding layer, 7. semi-conductive buffer layer, 8. inner sheath layer, 9. buckle assembly, 9.1. buckle shaft, 9.1.1. elastic hook, 9.2. buckle hole, 9.2.1. buckle connection hole, 10. ordinary filling strip, 11. water-blocking tape, 12. outer sheath. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0036] like Figure 1-3 As shown, a dynamic-static combined submarine cable comprises a body, wherein the body comprises a dynamic cable 1 and a static cable 2, wherein the dynamic cable 1 comprises a dynamic cable core 1.1, a dynamic filling steel strand 1.2 and a dynamic armor layer 1.3, wherein the static cable 2 comprises a static cable core 2.1, a static filling strip 2.2 and a static armor layer 2.3, wherein the dynamic cable core 1.1 is connected to the static cable core 2.1 correspondingly, wherein the dynamic cable core 1.1 and the static cable core 2.1 have the same structure, wherein the dynamic filling steel strand 1.2 is connected to the static filling strip 2.2 correspondingly The inner layer of the dynamic filling steel strand 1.2 is a steel strand 1.2.1 in which multiple steel wires are twisted into bundles, the outer layer of the dynamic filling steel strand 1.2 is a dynamic steel strand PE sheath 1.2.2, the static filling strip 2.2 is made of PE material, the dynamic armor layer 1.3 is correspondingly connected to the static armor layer 2.3, the dynamic armor layer 1.3 is formed by twisting dynamic armor steel wires 1.3.1, and the static armor layer 2.3 is formed by twisting static armor steel wires 2.3.1 and PE wires 2.3.2.

[0037] The dynamic cable core 1.1 and the static cable core 2.1 both include a conductor core wire 3, an inner shielding layer 4, an insulating layer 5, an outer shielding layer 6, a metal shielding layer, a semi-conductive buffer layer 7, a metal sheath layer and an inner sheath layer 8 arranged from the inside to the outside. The conductor core wire 3 comprises a plurality of copper wires twisted into a bundle, and the inner shielding layer 4, the insulating layer 5, the outer shielding layer 6, the metal shielding layer, the semi-conductive buffer layer 7, the metal sheath layer and the inner sheath layer 8 are conventional submarine cable molding structures. In the figure, the metal shielding layer and the metal sheath layer are smaller in size and are not marked.

[0038] In the figure, the conductor core wire 3, steel strand 1.2.1, dynamic armor steel wire 1.3.1, static armor steel wire 2.3.1, and PE wire 2.3.2 are all twisted, but in order to avoid cluttered lines, the diagram uses straight lines. The conductor core wire 3 in the dynamic cable core 1.1 and the conductor core wire 3 in the static cable core 2.1 are twisted in the same direction, and the dynamic armor steel wire 1.3.1, static armor steel wire 2.3.1, and PE wire 2.3.2 are twisted in the same direction.

[0039] At one end of the dynamic cable 1 close to the static cable 2, the steel strand 1.2.1 is arranged to protrude from the dynamic steel strand PE sheath 1.2.2, and the static filling strip 2.2 is provided with a filling strip connecting hole 2.2.1 plugged into the steel strand 1.2.1 at one end close to the dynamic filling steel strand 1.2, and the wire diameter of the steel strand 1.2.1 is equal to the hole diameter of the filling strip connecting hole 2.2.1.

[0040] like Figure 2-5 As shown, the dynamic armor layer 1.3 is twisted with multiple layers of dynamic armor steel wires 1.3.1, and the static armor layer 2.3 is twisted with multiple layers of static armor steel wires 2.3.1 and PE wires 2.3.2. In the static armor layer 2.3, the static armor steel wires 2.3.1 and PE wires 2.3.2 of the same layer are arranged in an alternating distribution. The wire diameters of the dynamic armor steel wires 1.3.1, the static armor steel wires 2.3.1, and the PE wires 2.3.2 are equal. The static armor steel wires 2.3.1 are welded and fixed to the relative dynamic armor steel wires 1.3.1, and the PE wires 2.3.2 are fixedly connected to the relative dynamic armor steel wires 1.3.1. The PE wire 2.3.2 is fixedly connected to the dynamic armor steel wire 1.3.1 through a buckle assembly 9, and the buckle assembly 9 includes a buckle shaft 9.1 provided on the PE wire 2.3.2 and a buckle hole 9.2 provided on the dynamic armor steel wire 1.3.1. The outer diameter of the buckle assembly 9 is equal to the wire diameter of the dynamic armor steel wire 1.3.1. A plurality of elastic hooks 9.1.1 bent radially are arranged on the circumference of the insertion end of the buckle shaft 9.1. The axes of the plurality of elastic hooks 9.1.1 are hollow, and a plurality of buckle connection holes 9.2.1 buckled with the elastic hooks 9.1.1 are arranged on the circumference of the buckle hole 9.2.

[0041] A method for manufacturing a dynamic and static combined submarine cable is used to form a dynamic and static combined submarine cable, and the steps are as follows:

[0042] S1: formed dynamic cable 1 and static cable 2;

[0043] S2: Make the dynamic cable 1 and the static cable 2 close to each other, and make the dynamic cable core 1.1 and the static cable core 2.1 face each other, the dynamic filling steel strand 1.2 and the static filling strip 2.2 face each other, and the dynamic armor steel wire 1.3.1 and the static armor steel wire 2.3.1 and the PE wire 2.3.2 face each other;

[0044] S3: everted dynamic armor steel wire 1.3.1, static armor steel wire 2.3.1, PE wire 2.3.2 and ordinary filling strip 10;

[0045] S4: heating the steel strand 1.2.1 in the dynamic filling steel strand 1.2, and before the steel strand 1.2.1 cools down, bringing the dynamic cable 1 and the static cable 2 close to each other, inserting the steel strand 1.2.1 into the filling bar connection hole 2.2.1 until the dynamic cable core 1.1 and the static cable core 2.1 abut against each other;

[0046] S5: After the steel strand 1.2.1 is cooled, the conductor core wire 3 of the dynamic cable core 1.1 and the conductor core wire 3 of the static cable core 2.1 are welded;

[0047] S6: The outer layer at the connection of the conductor core wire 3 is covered with an inner shielding layer 4, an insulating layer 5, an outer shielding layer 6, a metal shielding layer, a semi-conductive buffer layer 7, a metal sheath layer and an inner sheath layer 8 in sequence;

[0048] S7: The outer layer of the steel strand 1.2.1 between the dynamic cable 1 and the static cable 2 is the PE sheath 1.2.2 of the dynamic steel strand;

[0049] S8: straightening and welding the common filling strip 10;

[0050] S9: coating with water-blocking tape 11;

[0051] S10: Straighten dynamic armor steel wire 1.3.1, static armor steel wire 2.3.1, PE wire 2.3.2;

[0052] S11: fix the relative dynamic armor steel wire 1.3.1 and the static armor steel wire 2.3.1 by spot welding, and fix the relative dynamic armor steel wire 1.3.1 and the PE wire 2.3.2 by plugging;

[0053] S12: forming the outer sheath 12.

[0054] Before step S4, glue specially used for bonding steel and PE can also be coated in the filling bar connection hole 2.2.1. After the steel strand 1.2.1 is inserted into the filling bar connection hole 2.2.1, the steel strand 1.2.1 will destroy the flatness of the internal structure of the filling bar connection hole 2.2.1, allowing the molten PE material to penetrate into the gap of the steel strand 1.2.1, and at the same time, the glue also penetrates into the gap of the steel strand 1.2.1, thereby achieving a high-strength bonding effect between the filling bar connection hole 2.2.1 and the steel strand 1.2.1.

[0055] like Figure 6 As shown, the static cable 2 is laid on the seabed, and the dynamic cable 1 is connected between the floating body and the static cable 2. The dynamic cable 1 will undergo corresponding dynamic changes due to the movement and rise and fall of the floating body, so the mechanical strength of the dynamic cable 1 needs to be higher than that of the static cable 2. Through the design of the present invention, the dynamic cable 1 and the static cable 2 are both independently formed without interfering with each other, and the dynamic cable 1 and the static cable 2 have the same structural distribution. Compared with the static cable 2, the dynamic cable 1 has only one more step of twisting and forming of the steel strands 1.2.1 and one more step of forming the dynamic steel strand PE sheath 1.2.2. The other processes are the same, and the same set of process equipment can be used. Only part of the forming materials need to be replaced, so the forming process is simple; secondly, because the dynamic cable 1 and the static cable 2 are independently formed, they can be separated and placed before being assembled into a submarine cable, so it is easier to transport and store, and there is no need to worry about the dynamic cable 1 and the static cable 2 being stored on the same storage tray, and the dynamic cable is concentrated at one end of the storage tray to cause uneven quality and eccentric center of gravity, and the safety hazard is small; at the same time, the wire diameter of the dynamic cable 1 is the same as that of the static cable 2, and there is no obvious interface when laid on the seabed, so that the impact of ocean currents is small and it is not easy to be damaged. Compared with the traditional variable diameter design or integrated design between the dynamic cable 1 and the static cable 2, the production cost is lower and the cost performance is higher.

[0056] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A dynamic and static combined submarine cable, comprising a body, characterized in that: The body comprises a dynamic cable (1) and a static cable (2); the dynamic cable (1) comprises a dynamic cable core (1.1), a dynamic filling steel strand (1.2) and a dynamic armor layer (1.3); the static cable (2) comprises a static cable core (2.1), a static filling strip (2.2) and a static armor layer (2.3); the dynamic cable core (1.1) is connected to the static cable core (2.1) correspondingly; the dynamic cable core (1.1) and the static cable core (2.1) have the same structure; the dynamic filling steel strand (1.2) is connected to the static filling strip (2.2) correspondingly; the dynamic cable core (1.1) and the static cable core (2.1) have the same structure; the dynamic filling steel strand (1.2) and the static filling strip (2.2) are connected to the dynamic cable core (1.1) correspondingly; The inner layer of the filling steel strand (1.2) is a steel strand (1.2.1) in which multiple steel wires are twisted into bundles, the outer layer of the dynamic filling steel strand (1.2) is a dynamic steel strand PE sheath (1.2.2), the static filling strip (2.2) is made of PE material, the dynamic armor layer (1.3) is connected to the static armor layer (2.3) correspondingly, the dynamic armor layer (1.3) is formed by twisting dynamic armor steel wires (1.3.1), and the static armor layer (2.3) is formed by twisting static armor steel wires (2.3.1) and PE wires (2.3.2).

2. A dynamic-static combined submarine cable according to claim 1, characterized in that: The dynamic cable core (1.1) and the static cable core (2.1) both comprise a conductor core (3), an inner shielding layer (4), an insulating layer (5), an outer shielding layer (6), a metal shielding layer, a semi-conductive buffer layer (7), a metal sheath layer and an inner sheath layer (8) arranged from the inside to the outside. The conductor core (3) comprises a plurality of copper wires twisted into a bundle. The conductor core (3) of the dynamic cable core (1.1) and the conductor core (3) of the static cable core (2.1) are connected by welding, and then an inner shielding layer (4), an insulating layer (5), an outer shielding layer (6), a metal shielding layer, a semi-conductive buffer layer (7), a metal sheath layer and an inner sheath layer (8) are sequentially formed on the outer layer at the connection of the conductor core (3).

3. A dynamic-static combined submarine cable according to claim 1, characterized in that: At one end of the dynamic cable (1) close to the static cable (2), the steel strand (1.2.1) is arranged to protrude from the dynamic steel strand PE sheath (1.2.2), and at one end of the static filling strip (2.2) close to the dynamic filling steel strand (1.2) is provided a filling strip connection hole (2.2.1) for plugging into the steel strand (1.2.1).

4. A dynamic-static combined submarine cable according to claim 3, characterized in that: The wire diameter of the steel strand (1.2.1) is equal to the hole diameter of the filling bar connection hole (2.2.1). Before the steel strand (1.2.1) is inserted into the filling bar connection hole (2.2.1), the steel strand (1.2.1) is first heated and inserted into the filling bar connection hole (2.2.1) before the steel strand (1.2.1) is cooled.

5. The dynamic-static combined submarine cable according to claim 1, characterized in that: The dynamic armor layer (1.3) is twisted with multiple layers of dynamic armor steel wires (1.3.1), and the static armor layer (2.3) is twisted with multiple layers of static armor steel wires (2.3.1) and PE wires (2.3.2). In the static armor layer (2.3), the static armor steel wires (2.3.1) and PE wires (2.3.2) of the same layer are arranged in an alternating distribution.

6. A dynamic-static combined submarine cable according to claim 5, characterized in that: The dynamic armor steel wire (1.3.1), the static armor steel wire (2.3.1) and the PE wire (2.3.2) have the same wire diameters; the static armor steel wire (2.3.1) is welded and fixed to the corresponding dynamic armor steel wire (1.3.1); and the PE wire (2.3.2) is fixedly connected to the corresponding dynamic armor steel wire (1.3.1).

7. A dynamic-static combined submarine cable according to claim 6, characterized in that: The PE wire (2.3.2) and the dynamic armor steel wire (1.3.1) are fixedly connected via a buckle assembly (9); the buckle assembly (9) comprises a buckle shaft (9.1) provided on the PE wire (2.3.2) and a buckle hole (9.2) provided on the dynamic armor steel wire (1.3.1); the outer diameter of the buckle assembly (9) is equal to the wire diameter of the dynamic armor steel wire (1.3.1).

8. A dynamic-static combined submarine cable according to claim 7, characterized in that: A plurality of elastic hooks (9.1.1) bent in radial direction are arranged on the circumference of the insertion end of the buckling shaft (9.1), and the axes of the plurality of elastic hooks (9.1.1) are hollow. A plurality of buckling connection holes (9.2.1) buckled with the elastic hooks (9.1.1) are arranged on the circumference of the buckling hole (9.2).

9. A method for manufacturing a dynamic-static combined submarine cable, used for forming any one of the dynamic-static combined submarine cables of claims 1-8, characterized in that: The steps are as follows: S1: formed dynamic cable (1) and static cable (2); S2: The dynamic cable (1) and the static cable (2) are brought close to each other, and the dynamic cable core (1.1) and the static cable core (2.1) are placed one by one opposite each other, the dynamic filling steel strands (1.2) and the static filling strips (2.2) are placed one by one opposite each other, and the dynamic armor steel wires (1.3.1) and the static armor steel wires (2.3.1) and the PE wires (2.3.2) are placed one by one opposite each other; S3: External dynamic armor wire (1.3.1), static armor wire (2.3.1), PE wire (2.3.2) and ordinary filling strip (10); S4: heating the steel strands (1.2.1) in the dynamic filling steel strands (1.2), and before the steel strands (1.2.1) cool down, bringing the dynamic cable (1) and the static cable (2) closer to each other, inserting the steel strands (1.2.1) into the filling bar connection hole (2.2.1) until the dynamic cable core (1.1) and the static cable core (2.1) abut against each other; S5: After the steel strand (1.2.1) cools down, the conductor core wire (3) of the dynamic cable core (1.1) and the conductor core wire (3) of the static cable core (2.1) are welded; S6: The outer layer at the connection of the conductor core wire (3) is covered with an inner shielding layer (4), an insulating layer (5), an outer shielding layer (6), a metal shielding layer, a semi-conductive buffer layer (7), a metal sheath layer and an inner sheath layer (8) in sequence; S7: The dynamic steel strand PE sheath (1.2.2) of the outer layer of the steel strand (1.2.1) between the formed dynamic cable (1) and the static cable (2); S8: straightening and welding the common filling strip (10); S9: coating with water-blocking tape (11); S10: Straighten dynamic armor steel wire (1.3.1), static armor steel wire (2.3.1), PE wire (2.3.2); S11: The relative dynamic armor steel wire (1.3.1) and the static armor steel wire (2.3.1) are fixed by spot welding, and the relative dynamic armor steel wire (1.3.1) and the PE wire (2.3.2) are fixed by plugging; S12: Molding outer sheath (12).

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