Submarine cable applicable to floating wind turbine, and processing method therefor

Abstract

The present invention provides a submarine cable applicable to a floating wind turbine, and a processing method therefor. The submarine cable applicable to a floating wind turbine comprises: a dynamic cable, a static cable, and a connector. In the dynamic cable, a first power unit and a first optical fiber unit are arranged on the inner side of a first inner sheath layer, and a first armor layer, a second armor layer, and a first outer sheath layer are successively arranged on the outer periphery of the first inner sheath layer. In the static cable, a second power unit and a second optical fiber unit are arranged on the inner side of a second inner sheath layer, and a third armor layer and a second outer sheath layer are successively arranged on the outer periphery of the second inner sheath layer. The first power unit and the second power unit are formed into a one-piece member. The first optical fiber unit and the second optical fiber unit are formed into a one-piece member. The first inner sheath layer and the second inner sheath layer are formed into a one-piece member. The first armor layer and the third armor layer are formed into a one-piece member. The connector has an accommodating cavity for accommodating the connection between the second armor layer and the second outer sheath layer, or accommodating the connection between the second armor layer and the third armor layer; and the accommodating cavity is filled with a water blocking glue.

Description

Submarine cable suitable for floating wind power and processing method thereof

[0001] The present application claims priority to the Chinese patent application No. 202411249120.5, filed on September 6, 2024, and entitled "Submarine cable suitable for floating wind power and processing method thereof", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of submarine cables, and in particular to a submarine cable suitable for floating wind power and a processing method thereof. BACKGROUND

[0003] Generally, offshore floating wind turbines are connected with dynamic cables, but the floating wind turbines are located in deep sea, and the output cables are all made of dynamic cables, which has high cost, so generally the combination of floating section dynamic cable and straight buried section static cable is adopted. There are generally two forms for connecting dynamic cable and static cable, one is flexible online transition joint, and the other is maintenance joint.

[0004] In order to ensure that the armored metal wires of the dynamic cable are dry and do not contact seawater, the existing flexible transition joint has a large size to meet its water blocking performance, which is not conducive to product circulation and transportation and laying. The bending performance of the maintenance joint is poor and cannot meet the whole cable storage and transportation of the project. SUMMARY

[0005] The present application provides a submarine cable suitable for floating wind power and a processing method thereof, to solve the problem of large size and poor bending performance of the transition joint of the dynamic cable and the static cable in the prior art, which is not conducive to storage and transportation.

[0006] The present application provides a submarine cable suitable for floating wind power, comprising: a dynamic cable, comprising a first power unit, a first optical fiber unit, a first inner protective layer, a first armored layer, a second armored layer and a first outer protective layer, the first power unit and the first optical fiber unit are arranged on the inner side of the first inner protective layer, and the first armored layer, the second armored layer and the first outer protective layer are sequentially arranged on the outer periphery of the first inner protective layer;

[0007] a static cable, comprising a second power unit, a second optical fiber unit, a second inner protective layer, a third armored layer and a second outer protective layer, the second power unit and the second optical fiber unit are arranged on the inner side of the second inner protective layer, and the third armored layer and the second outer protective layer are sequentially arranged on the outer periphery of the second inner protective layer;

[0008] The first power unit and the second power unit are one-piece; the first optical fiber unit and the second optical fiber unit are one-piece; the first inner protective layer and the second inner protective layer are one-piece; and the first armored layer and the third armored layer are one-piece.

[0009] a connecting piece having a receiving cavity for accommodating the joint of the second armored layer and the second outer sheath; or for accommodating the joint of the second armored layer and the third armored layer; the receiving cavity is filled with water-blocking glue.

[0010] According to the application, the first armored layer is coated with water-blocking glue on the outer wall surface close to the third armored layer; the third armored layer is coated with water-blocking glue on the outer wall surface close to the first armored layer.

[0011] According to the application, the dynamic cable further comprises a first filling unit arranged on the inner side of the first inner sheath; the static cable further comprises a second filling unit arranged on the inner side of the second inner sheath; the first filling unit and the second filling unit are integrally formed.

[0012] According to the application, the dynamic cable further comprises a first cable-forming tape and a reinforcing tape; the first cable-forming tape is arranged on the inner side of the first inner sheath to fix the first power unit, the first optical fiber unit and the first filling unit; the reinforcing tape is arranged between the first armored layer and the second armored layer; the static cable further comprises a second cable-forming tape arranged on the inner side of the second inner sheath to fix the second power unit, the second optical fiber unit and the second filling unit; the first cable-forming tape and the second cable-forming tape are integrally formed.

[0013] According to the application, the connecting piece is provided with a first fixing hole close to the side wall of the second armored layer, and the second armored layer is fixedly connected to the connecting piece through the first fixing hole; the connecting piece is provided with a second fixing hole close to the side wall of the second outer sheath, and the second outer sheath is fixedly connected to the connecting piece through the second fixing hole.

[0014] According to the application, the connecting piece comprises a non-metal layer and a metal layer, and the metal layer is arranged on the outer wall surface of the non-metal layer.

[0015] According to the application, the connecting piece comprises a first shell and a second shell, one of the first shell and the second shell is provided with a protruding part, and the other is provided with a matching part, and the matching part and the protruding part are matched and clamped to form a receiving cavity.

[0016] According to the application, the first outer sheath and the second outer sheath are integrally formed.

[0017] The application also provides a processing method of a submarine cable suitable for floating wind power, for processing the submarine cable suitable for floating wind power according to any one of the above, the processing method comprising:

[0018] continuously processing a power unit, an optical fiber unit, a filling unit, a cable-making tape, an inner sheath, and an armor layer, the power unit comprising a first power unit and a second power unit, the optical fiber unit comprising a first optical fiber unit and a second optical fiber unit, the filling unit comprising a first filling unit and a second filling unit, the cable-making tape comprising a first cable-making tape and a second cable-making tape, the inner sheath comprising a first inner sheath and a second inner sheath, and the armor layer comprising a first armor layer and a third armor layer;

[0019] processing a second armor layer on the outer wall surface of the first armor layer;

[0020] after processing a second outer sheath on the outer wall surface of the third armor layer, sleeving a connecting piece at the connection between the second outer sheath and the second armor layer, filling water-blocking glue between the connecting piece and the second armor layer and between the connecting piece and the second outer sheath, and processing a first outer sheath on the outer wall surface of the second armor layer and the connecting piece;

[0021] or, sleeving a connecting piece at the connection between the second armor layer and the third armor layer, filling water-blocking glue between the connecting piece and the second armor layer and between the connecting piece and the third armor layer, and processing an outer sheath on the outer wall surface of the second armor layer, the third armor layer, and the connecting piece, the outer sheath comprising a first outer sheath and a second outer sheath.

[0022] According to the processing method of the submarine cable suitable for floating wind power provided by the application, a second armor layer is processed on the outer wall surface of the first armor layer, and before this, water-blocking glue is coated on the outer wall surface of the first armor layer close to the third armor layer and on the outer wall surface of the third armor layer close to the first armor layer.

[0023] According to the processing method of the submarine cable suitable for floating wind power provided by the application, in the case where a connecting piece is sleeved at the connection between the second armor layer and the third armor layer, the second armor layer is fixed to the connecting piece; and in the case where a connecting piece is sleeved at the connection between the second outer sheath and the second armor layer, the second armor layer and the second outer sheath are fixedly connected to the connecting piece.

[0024] The application provides the submarine cable suitable for floating wind power and a processing method thereof, which is characterized in that the power unit, the optical fiber unit, the inner protective layer and the armored layer with the same structure in the dynamic cable and the static cable are respectively arranged as an integral forming part, so that the connection is reduced; the second armored layer of the dynamic cable and the static cable is connected through the connecting piece, and the first outer protective layer is arranged on the outer periphery of the second armored layer and the connecting piece, so that the water resistance performance is improved, the size is small, and the submarine cable is light, which is beneficial to production, storage and transportation. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0026] Fig. 1 is a structural schematic view of the submarine cable suitable for floating wind power in water according to the application;

[0027] Fig. 2 is a structural schematic view of the submarine cable suitable for floating wind power according to the application;

[0028] Fig. 3 is a sectional schematic view of the dynamic cable according to the application;

[0029] Fig. 4 is a sectional schematic view of the static cable according to the application;

[0030] Fig. 5 is a structural schematic view of the connecting piece according to the application;

[0031] Fig. 6 is a sectional view of the connecting piece according to the application;

[0032] Fig. 7 is a flow schematic view of the processing method of the submarine cable suitable for floating wind power according to the application.

[0033] Fig. 7 is a flow schematic view of the processing method of the submarine cable suitable for floating wind power according to the application. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application with reference to the drawings in the present application. Obviously, the described embodiments are only a part of embodiments of the present application, and not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected, can be mechanically connected, can also be electrically connected, can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0037] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0038] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation on the present application.

[0039] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of certain examples are described in the following disclosure. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0040] The following describes the sea cable suitable for floating wind power and its processing method of the present application in combination with FIG. 1-FIG. 7.

[0041] The embodiment of the present application provides a sea cable suitable for floating wind power, which comprises a dynamic cable 10, a static cable 20 and a connecting piece 30, as shown in FIG. 1.

[0042] As shown in FIG. 3, the dynamic cable 10 comprises a first power unit 11, a first optical fiber unit 12, a first inner sheath 15, a first armor layer 16, a second armor layer 18 and a first outer sheath 19. The first power unit 11 is used to bear current transmission. The first optical fiber unit 12 is used to realize information transmission and monitoring of the power unit. The first power unit 11 and the first optical fiber unit 12 are arranged inside the first inner sheath 15, which can be a polyethylene inner sheath, used to protect the internal first power unit 11 and first optical fiber unit 12. The first armor layer 16, the second armor layer 18 and the first outer sheath 19 are arranged in sequence outside the first inner sheath 15. Among them, the first armor layer 16 and the second armor layer 18 play a reinforcing role to improve their mechanical properties. The first outer sheath 19 is arranged outside the second armor layer 18, used to protect the first armor layer 16 and the second armor layer 18, avoiding corrosion by seawater. The first outer sheath 19 can be a sheath. The first armor layer 16 and the second armor layer 18 can be steel wires.

[0043] As shown in FIG. 4, the static cable 20 comprises a second power unit 21, a second optical fiber unit 22, a second inner sheath 25, a third armor layer 26 and a second outer sheath 27. The second power unit 21 is used to bear current transmission. The second optical fiber unit 22 is used to realize information transmission. The second power unit 21 and the second optical fiber unit 22 are arranged inside the second inner sheath 25, which can be a polyethylene inner sheath, used to protect the internal second power unit 21 and second optical fiber unit 22. The third armor layer 26 is arranged outside the second inner sheath 25, playing a reinforcing role to improve its mechanical properties. The second outer sheath 27 is arranged outside the third armor layer 26, playing a role of fixing the third armor layer 26. The second outer sheath 27 can be a sheath or a PP rope. The third armor layer 26 can be a steel wire.

[0044] The first power unit 11 and the second power unit 21 in the embodiment of the present application are of the same structure and size, and are integrally formed and continuously produced. The first optical fiber unit 12 and the second optical fiber unit 22 are of the same size, fiber type and number of optical fiber units, and are integrally formed and continuously produced. The first inner sheath 15 and the second inner sheath 25 are of the same material and size, such as polyethylene inner sheath, and are integrally formed and continuously produced. The first armor layer 16 and the third armor layer 26 are of the same material, mechanism and number, and are integrally formed and continuously produced. That is, the power unit, the optical fiber unit, the inner sheath and the armor layer outside the inner sheath in the dynamic cable 10 and the static cable 20 in the submarine cable are integrally formed and continuously processed.

[0045] Further, in one embodiment, the second armor layer 18 is processed on the outer periphery of the first armor layer 16, and the second outer sheath 27 is processed on the outer periphery of the third armor layer 26. At this time, the connection between the second armor layer 18 and the second outer sheath 27 is the connection between the dynamic cable 10 and the static cable 20. The connecting piece 30 has a receiving cavity, and the connecting piece 30 is sleeved on the connection between the second armor layer 18 and the second outer sheath 27 to fix the dynamic cable 10 and the static cable 20, as shown in FIG. 2. In order to prevent seawater from entering between the inner wall surface of the connecting piece 30 and the outer wall surface of the second outer sheath 27 and / or the second armor layer 18, the embodiment of the present application fills water-blocking glue between the inner wall surface of the connecting piece 30 and the outer wall surface of the second outer sheath 27 and between the inner wall surface of the connecting piece 30 and the outer wall surface of the second armor layer 18 to strengthen the sealing. After completion, the first outer sheath 19 is extruded on the outer periphery of the second armor layer 18, the first outer sheath 19 covers the connecting piece 30, and covers the part of the second outer sheath 27 close to the connecting piece 30, such as covering the length of 30-50 mm of the second outer sheath 27, and has good sealing performance.

[0046] In another embodiment, the second armor layer 18 is processed at the outer periphery of the first armor layer 16, and the connection between the second armor layer 18 and the third armor layer 26 is the connection between the dynamic cable 10 and the static cable 20. The connector 30 has a receiving cavity, and the connector 30 is sleeved on the connection between the second armor layer 18 and the third armor layer 26 to fix the dynamic cable 10 and the static cable 20. In order to prevent seawater from entering between the inner wall surface of the connector 30 and the outer wall surface of the second armor layer 18 and / or the outer wall surface of the third armor layer 26, the embodiment of the present application fills water-blocking glue between the inner wall surface of the connector 30 and the outer wall surface of the second armor layer 18 and between the inner wall surface of the connector 30 and the outer wall surface of the third armor layer 26 to strengthen the sealing. After completion, the outer periphery of the second armor layer 18 and the third armor layer 26 is extruded with the first outer sheath 19 and the second outer sheath 27, and the first outer sheath 19 and the second outer sheath 27 are made of the same material, such as polyethylene sheath, that is, the first outer sheath 19 and the second outer sheath 27 are integrally formed and can be continuously produced. It should be noted that the outer periphery of the connector 30 is also processed with an outer sheath. In addition, in the case where the materials of the first outer sheath 19 and the second outer sheath 27 are different, the first outer sheath 19 can be processed at the outer periphery of the second armor layer 18, and the second outer sheath 27 can be processed at the outer periphery of the third armor layer 26.

[0047] The submarine cable suitable for floating wind power provided by the embodiment of the present application reduces the connection by integrally forming the power unit, the optical fiber unit, the inner sheath and the armor layer with the same structure in the dynamic cable 10 and the static cable 20. The second armor layer 18 of the dynamic cable 10 is connected with the static cable 20 through the connector 30, the first outer sheath 19 covers the outer periphery of the second armor layer 18 and the connector 30, the water-blocking performance is improved, the size is small, and the submarine cable is light, which is beneficial to production, storage and transportation.

[0048] In order to improve the water-blocking performance of the submarine cable, the embodiment of the present application coats water-blocking glue on the outer wall surface of the first armor layer 16 close to the third armor layer 26 after continuously producing the first armor layer 16 and the third armor layer 26, such as 2500-3000 mm. The water-blocking glue is also coated on the outer wall surface of the third armor layer 26 close to the first armor layer 16, such as 2500-3000 mm. That is, the water-blocking glue is coated on both sides of the junction between the dynamic cable 10 and the static cable 20 to achieve water-blocking. It should be noted that the water-blocking glue on the outer wall surface of the first armor layer 16 and the outer wall surface of the third armor layer 26 is solidified before continuing the production.

[0049] The dynamic cable 10 in the embodiment of the present application further comprises a first filling unit 13 arranged on the inner side of the first inner protective layer 15 between the first optical fiber unit 12 and the first power unit 11, so as to improve the roundness of the cable core of the dynamic cable 10. The static cable 20 further comprises a second filling unit 23 arranged on the inner side of the second inner protective layer 25 between the second optical fiber unit 22 and the second power unit 21, so as to improve the roundness of the cable core of the static cable 20. Further, the first filling unit 13 and the second filling unit 23 can be integrally formed and need not be connected, so that continuous production can be realized.

[0050] The dynamic cable 10 further comprises a first cable-forming wrapping tape 14 arranged on the inner side of the first inner protective layer 15 so as to fix the first power unit 11, the second power unit 21 and the first filling unit 13. The static cable 20 further comprises a second cable-forming wrapping tape 24 arranged on the inner side of the second inner protective layer 25 so as to fix the second power unit 21, the second optical fiber unit 22 and the second filling unit 23. Further, the first cable-forming wrapping tape 14 and the second cable-forming wrapping tape 24 can be integrally formed and have the same material and size, so that continuous production can be realized.

[0051] The dynamic cable 10 in the embodiment of the present application further comprises a reinforcing wrapping tape 17 arranged between the first armor layer 16 and the second armor layer 18, so as to prevent the first armor layer 16 and the second armor layer 18 from contacting and being abraded and to play a protective role.

[0052] Further, the connecting piece 30 in the embodiment of the present application further comprises a first fixing hole 35 and a second fixing hole 36. As shown in FIG. 5, the first fixing hole 35 is arranged on the side of the connecting piece 30 close to the second armor layer 18, the second armor layer 18 can be arranged in the first fixing hole 35 and is bent and knotted, so as to be fixedly connected to the connecting piece 30 and to prevent the second armor layer 18 from moving at will. Further, the outer periphery of the second armor layer 18 is provided with a fixing belt 40, the fixing belt 40 is used to fix the position of the second armor layer 18, so that the second armor layer 18 uniformly covers the outer periphery of the first armor layer 16. The fixing belt 40 can be fixed close to the connecting piece 30. The fixing belt 40 can be multiple, and the multiple fixing belts 40 are arranged in the extension direction of the second armor layer 18. The fixing belt 40 in the embodiment of the present application can be a metal fixing belt 40. The second fixing hole 36 is arranged on the side wall of the connecting piece 30 close to the second outer protective layer 27, the second outer protective layer 27 can be a PP rope, the PP rope can be arranged in the second fixing hole 36 and is bent and knotted, so as to be fixedly connected to the connecting piece 30, so as to realize the connection of the dynamic cable 10 and the static cable 20. Further, the first outer protective layer 19 covers the outer wall surface of the second armor layer 18, the connecting piece 30 and the second outer protective layer 27 close to the connecting piece 30, so as to prevent seawater from entering the inside from the second fixing hole 36 and to realize water resistance.

[0053] As shown in FIG. 6, the connecting piece 30 in the embodiment of the present application is provided with a containing cavity, and is sleeved on the connecting position of the second armor layer 18 and the third armor layer 26. The connecting piece 30 comprises a metal layer 33 and a non-metal layer 34. The metal layer 33 is arranged on the outer wall surface of the non-metal layer 34. The non-metal layer 34 has a certain elasticity, and the inner diameter of the non-metal layer 34 is generally selected to be 1-2 mm larger than the maximum cable diameter. After installation, the non-metal layer 34 can be tightly pressed on the outer wall surface of the second armor layer 18 to achieve water blocking. The metal layer 33 provides the required mechanical stress for the connecting piece 30. Further, the connecting piece 30 in the embodiment of the present application is tightly pressed and blocked by the high-elasticity non-metal, and then is sealed by glue filling. The bending performance of the connecting piece 30 is higher than that of the connecting piece directly filled with glue, the connecting piece 30 is easy to bend, and the connecting piece 30 can avoid cracking after multiple bending, thereby helping to achieve water blocking.

[0054] The connecting piece 30 in the embodiment of the present application can have a Haver structure. Specifically, as shown in FIG. 5 and FIG. 6, the connecting piece 30 comprises a first shell 31 and a second shell 32. One of the first shell 31 and the second shell 32 is provided with a protruding part, and the other is provided with a matching part. The matching part and the protruding part are connected to form a containing cavity. The connecting piece 30 in the embodiment of the present application is provided as a detachable piece, which facilitates installation and improves production efficiency. Further, the connecting position of the first shell 31 and the second shell 32 is coated with sealing glue to strengthen sealing and prevent seawater from entering the inside from the connecting position of the first shell 31 and the second shell 32.

[0055] Based on the cable suitable for floating wind power of any of the above embodiments, the embodiment of the present application further provides a processing method of the submarine cable suitable for floating wind power. As shown in FIG. 7, the processing method comprises the following steps: 100, continuously processing a power unit, an optical fiber unit, a filling unit, a cabling wrapping, an inner protective layer and an armor layer. The power unit comprises a first power unit and a second power unit. The optical fiber unit comprises a first optical fiber unit and a second optical fiber unit. The filling unit comprises a first filling unit and a second filling unit. The cabling wrapping comprises a first cabling wrapping and a second cabling wrapping. The inner protective layer comprises a first inner protective layer and a second inner protective layer. The armor layer comprises a first armor layer and a third armor layer.

[0056] Specifically, the first power unit and the second power unit are continuously processed, the first power unit and the second power unit are integrally formed without connection, form the power unit of the submarine cable, and realize current transmission. The first optical fiber unit and the second optical fiber unit are continuously processed, the first optical fiber unit and the second optical fiber unit are integrally formed without connection, form the optical fiber unit of the submarine cable, and realize information transmission. The first filling unit and the second filling unit are continuously processed, the first filling unit and the second filling unit are integrally formed without connection, form the filling unit of the submarine cable, are located between the optical fiber unit and the power unit, and adjust the roundness of the submarine cable. Further, the first cable forming tape and the second cable forming tape are continuously produced, the first cable forming tape and the second cable forming tape are integrally formed without connection, form the cable forming tape of the submarine cable, and fix the optical fiber unit, the power unit and the filling unit of the submarine cable. The first inner sheath and the second inner sheath are continuously produced, the first inner sheath and the second inner sheath are integrally formed without connection, form the inner sheath of the submarine cable, and protect the internal power unit, the optical fiber unit and the filling unit. The first armor layer and the third armor layer are continuously produced, the first armor layer and the third armor layer are integrally formed without connection, form the armor layer of the submarine cable, and enhance the mechanical properties.

[0057] Further, the armor layer of the submarine cable is coated with water-blocking glue to prevent water from entering the internal optical fiber unit and power unit through the armor layer. Specifically, the water-blocking glue is coated on the outer wall surface of the first armor layer close to the third armor layer, such as 2500-3000 mm; the water-blocking glue is also coated on the outer wall surface of the third armor layer close to the first armor layer, such as 2500-3000 mm; that is, the water-blocking glue is coated on both sides of the junction of the dynamic cable and the static cable to achieve water blocking. It should be noted that after the water-blocking glue on the outer wall surface of the first armor layer and the outer wall surface of the third armor layer is solidified, the production is continued.

[0058] Step 200, processing the second armor layer on the outer wall surface of the first armor layer.

[0059] Step 300, processing the second armor layer on the outer periphery of the first armor layer and processing the second outer sheath on the outer periphery of the third armor layer. At this time, the junction of the second armor layer and the second outer sheath is the junction of the dynamic cable and the static cable. The connecting piece has a receiving cavity, and the connecting piece is sleeved on the junction of the second armor layer and the second outer sheath to fix the dynamic cable and the static cable. In order to prevent seawater from entering between the inner wall surface of the connecting piece and the outer wall surface of the second outer sheath and / or the second armor layer, the water-blocking glue is filled between the inner wall surface of the connecting piece and the outer wall surface of the second outer sheath and between the inner wall surface of the connecting piece and the outer wall surface of the second armor layer to strengthen the sealing. After completion, the first outer sheath is extruded on the outer periphery of the second armor layer, the first outer sheath covers the connecting piece, and covers part of the second outer sheath close to the connecting piece, such as covering the length of 30-50 mm of the second outer sheath, etc., and has good sealing performance.

[0060] Further, the connecting piece is provided with a first fixing hole and a second fixing hole. As shown in FIG. 5, the first fixing hole is arranged on the side of the connecting piece close to the second armor layer, the second armor layer can be arranged in the first fixing hole and is bent and knotted to be fixed to the connecting piece, so that the second armor layer is prevented from moving randomly. Further, the outer periphery of the second armor layer is provided with a fixing belt, the fixing belt is used to fix the position of the second armor layer, so that the second armor layer uniformly covers the outer periphery of the first armor layer. The fixing belt can be fixed close to the connecting piece. The number of the fixing belts can be multiple, and the multiple fixing belts are arranged at intervals along the extension direction of the second armor layer. The fixing belt in the embodiment of the present application can be a metal fixing belt. The second fixing hole is arranged on the side wall of the connecting piece close to the second outer sheath layer, the second outer sheath layer can be a PP rope, the PP rope can be arranged in the second fixing hole and is bent and knotted to be fixed to the connecting piece, so that the dynamic cable and the static cable are connected. Further, the first outer sheath layer is processed on the outer wall surface of the connecting piece close to the second armor layer, the second armor layer and the second outer sheath layer, so that seawater is prevented from entering the inside from the second fixing hole, and water blocking is realized.

[0061] In another embodiment, the connecting piece is arranged at the connecting position of the second armor layer and the third armor layer to fix the dynamic cable and the static cable. It should be noted that the side of the connecting piece close to the second armor layer is provided with a first fixing hole, the second armor layer can be arranged in the first fixing hole and is bent and knotted to be fixed to the connecting piece, so that the second armor layer is prevented from moving randomly. Further, the outer periphery of the second armor layer is provided with a fixing belt, the fixing belt is used to fix the position of the second armor layer, so that the second armor layer uniformly covers the outer periphery of the first armor layer. The fixing belt can be fixed close to the connecting piece. The number of the fixing belts can be multiple, and the multiple fixing belts are arranged at intervals along the extension direction of the second armor layer. The fixing belt in the embodiment of the present application can be a metal fixing belt.

[0062] Further, in order to prevent seawater from entering between the inner wall surface of the connecting piece and the outer wall surface of the second armor layer and / or the outer wall surface of the third armor layer, water blocking glue is filled between the connecting piece and the second armor layer and between the connecting piece and the third armor layer to strengthen the sealing. After completion, the outer sheath layer is processed on the outer wall surface of the second armor layer, the third armor layer and the connecting piece, and the outer sheath layer includes a first outer sheath layer and a second outer sheath layer. In one embodiment, the first outer sheath layer and the second outer sheath layer are made of the same material, such as polyethylene sheath, that is, the first outer sheath layer and the second outer sheath layer are integrally formed and can be continuously produced. It should be noted that the outer periphery of the connecting piece is also processed with the outer sheath layer. In another embodiment, the first outer sheath layer and the second outer sheath layer are made of different materials and can be separately processed, the first outer sheath layer is processed on the outer periphery of the second armor layer, and the second outer sheath layer is processed on the outer periphery of the third armor layer. The first outer sheath layer and the second outer sheath layer have a repeated part at the joint on the connecting piece, and the sealing performance is good.

[0063] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A subsea cable suitable for floating wind farms, characterized in that, The application relates to a dynamic cable and a static cable. The dynamic cable comprises a first power unit, a first optical fiber unit, a first inner protective layer, a first armored layer, a second armored layer and a first outer protective layer, the first power unit and the first optical fiber unit are arranged on the inner side of the first inner protective layer, and the first armored layer, the second armored layer and the first outer protective layer are sequentially arranged on the outer periphery of the first inner protective layer. The static cable comprises a second power unit, a second optical fiber unit, a second inner protective layer, a third armored layer and a second outer protective layer, the second power unit and the second optical fiber unit are arranged on the inner side of the second inner protective layer, and the third armored layer and the second outer protective layer are sequentially arranged on the outer periphery of the second inner protective layer. The first power unit and the second power unit are integrally formed; the first optical fiber unit and the second optical fiber unit are integrally formed; the first inner protective layer and the second inner protective layer are integrally formed; and the first armored layer and the third armored layer are integrally formed. The connecting piece has a containing cavity for containing the joint of the second armored layer and the second outer protective layer or for containing the joint of the second armored layer and the third armored layer, and the containing cavity is filled with water-blocking glue.

2. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The outer wall surface of the first armored layer close to the third armored layer is coated with water-blocking glue, and the outer wall surface of the third armored layer close to the first armored layer is coated with water-blocking glue.

3. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The dynamic cable further comprises a first filling unit arranged on the inner side of the first inner protective layer, and the static cable further comprises a second filling unit arranged on the inner side of the second inner protective layer; the first filling unit and the second filling unit are integrally formed.

4. Subsea cable suitable for floating wind farms according to claim 3, characterized in that, The dynamic cable further comprises a first cable-forming tape arranged on the inner side of the first inner protective layer to fix the first power unit, the first optical fiber unit and the first filling unit, and a reinforcing tape arranged between the first armored layer and the second armored layer. The static cable further comprises a second cable-forming tape arranged on the inner side of the second inner protective layer to fix the second power unit, the second optical fiber unit and the second filling unit. The first cable-forming tape and the second cable-forming tape are integrally formed.

5. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The connecting piece is provided with a first fixing hole close to the side wall of the second armored layer, and the second armored layer is fixedly connected to the connecting piece through the first fixing hole; and the connecting piece is provided with a second fixing hole close to the side wall of the second outer protective layer, and the second outer protective layer is fixedly connected to the connecting piece through the second fixing hole.

6. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The connecting piece comprises a non-metal layer and a metal layer, and the metal layer is arranged on the outer wall surface of the non-metal layer.

7. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The connecting piece comprises a first shell and a second shell, one of the first shell and the second shell is provided with a protruding part, and the other is provided with a matching part, the matching part is matched with the protruding part to form a containing cavity.

8. Subsea cable suitable for floating wind farms according to claim 1, characterized in that, The first outer protective layer and the second outer protective layer are integrally formed.

9. A method of processing a sea cable suitable for floating wind power, characterized in that, The application further relates to a processing method for the sea cable suitable for floating wind power. The continuous processing power unit, optical fiber unit, filling unit, cable forming tape, inner protective layer and armored layer, the power unit includes a first power unit and a second power unit, the optical fiber unit includes a first optical fiber unit and a second optical fiber unit, the filling unit includes a first filling unit and a second filling unit, the cable forming tape includes a first cable forming tape and a second cable forming tape, the inner protective layer includes a first inner protective layer and a second inner protective layer, and the armored layer includes a first armored layer and a third armored layer; A second armored layer is processed on the outer wall surface of the first armored layer; After processing a second outer protective layer on the outer wall surface of the third armored layer, a connecting piece is sleeved at the connection between the second outer protective layer and the second armored layer, and water-blocking glue is filled between the connecting piece and the second armored layer and between the connecting piece and the second outer protective layer, and a first outer protective layer is processed on the outer wall surface of the second armored layer and the connecting piece; Or, a connecting piece is sleeved at the connection between the second armored layer and the third armored layer, and water-blocking glue is filled between the connecting piece and the second armored layer and between the connecting piece and the third armored layer, and an outer protective layer is processed on the outer wall surface of the second armored layer, the third armored layer and the connecting piece, the outer protective layer including a first outer protective layer and a second outer protective layer.

10. A process for the processing of a subsea cable suitable for floating wind applications according to claim 9, characterized in that, Before processing a second armored layer on the outer wall surface of the first armored layer, it further includes: The outer wall surface of the first armored layer near the third armored layer and the outer wall surface of the third armored layer near the first armored layer are coated with water-blocking glue.

11. A process for processing a subsea cable suitable for floating wind applications according to claim 9, characterized in that, In the case where the connecting piece is sleeved at the connection between the second armored layer and the third armored layer, the second armored layer is fixed to the connecting piece; in the case where the connecting piece is sleeved at the connection between the second outer protective layer and the second armored layer, the second armored layer and the second outer protective layer are fixedly connected to the connecting piece.

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