Submarine cable and manufacturing method

Abstract

Embodiments of the present application belong to the technical field of cables and provide a submarine cable and a manufacturing method. The submarine cable comprises a water-blocking conductor and a conductor shielding layer, an insulating layer, an insulating shielding layer, a water-blocking tape wrapping layer, a first protective layer, a first metal armor layer, an optical fiber unit, an inner liner layer, a second metal armor layer, and an outer coating layer which are sequentially wrapped on the exterior of the water-blocking conductor. The water-blocking conductor comprises a conductor, a water-blocking adhesive, and a water-blocking tape. The conductor is made by twisting at least two metal monofilaments onto one another. The water-blocking adhesive fills a twisting gap between the metal monofilaments, and the water-blocking tape wraps around the conductor and the water-blocking adhesive. The submarine cable and the manufacturing method provided in the embodiments of the present application solve the problem in the existing technology that it is difficult for the submarine cable to meet deep-sea applications.

Description

Submarine cable and manufacturing method

[0001] The present application claims priority from the Chinese patent application No. 202411395616.3 filed on September 30, 2024, and entitled "Submarine cable and manufacturing method", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of cables, in particular to a submarine cable and a manufacturing method. BACKGROUND

[0003] With the rapid development of offshore wind power, there are fewer and fewer offshore resource development, and future deep sea development will gradually become a major focus.

[0004] In the related art, the water blocking of the inner conductor of the submarine cable is mainly achieved by using a water blocking tape or a conventional water blocking glue type, which is generally applied to a water depth of 500 meters or less. The existing industrialized submarine cable is usually applied to a water depth of 100 meters or less.

[0005] However, the above submarine cables are difficult to meet the requirements of deep sea application. SUMMARY

[0006] The embodiments of the present application provide a submarine cable and a manufacturing method to solve the problem that the submarine cable in the prior art is difficult to meet the requirements of deep sea application.

[0007] To achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions:

[0008] In one aspect, the present application provides a submarine cable, comprising a water blocking conductor and a conductor shielding layer, an insulation layer, an insulation shielding layer, a water blocking tape wrapping layer, a first protective layer, a first metal armor layer, an optical fiber unit, an inner liner layer, a second metal armor layer and an outer sheath layer which are sequentially wrapped outside the water blocking conductor; the water blocking conductor comprises a conductor, water blocking glue and a water blocking tape, the conductor is made of at least two metal filaments twisted with each other, the water blocking glue is filled in the twisted gap between each metal filament, and the water blocking tape is wrapped around the conductor and the water blocking glue.

[0009] In one possible implementation, the water blocking tape comprises a seawater blocking type water blocking tape, and the thickness of the water blocking tape is 0.3±0.03 mm; the viscosity of the water blocking glue is 200000-300000 mpa·s at 25℃.

[0010] In one possible implementation, at least two filling protective layers are further included, the filling protective layers and the optical fiber unit are both compounded in the first metal armor layer, and each filling protective layer is distributed on both sides of the optical fiber unit to protect the optical fiber unit.

[0011] In a possible implementation, the filling protective layer comprises a first metal wire and a second protective layer, the second protective layer is extruded outside the first metal wire, and the optical fiber unit is in contact with the second protective layer.

[0012] In a possible implementation, the optical fiber unit comprises an optical fiber body and an optical fiber protective layer wrapped outside the optical fiber body.

[0013] In a possible implementation, the first metal armor layer comprises a second metal wire wound outside the first protective layer, the second metal armor layer comprises a third metal wire wound outside the inner lining layer, and the second metal wire and the third metal wire are arranged in different winding directions.

[0014] In another aspect, the embodiments of the present application provide a manufacturing method of the submarine cable, comprising the following steps: twisting at least two metal filaments to form a conductor, filling water-blocking glue in the twisted gap between the metal filaments, and wrapping a water-blocking tape around the conductor and the water-blocking glue to form a water-blocking conductor; wrapping a conductor shielding layer outside the water-blocking conductor; sequentially arranging an insulation layer, an insulation shielding layer, and a water-blocking tape wrapping layer outside the conductor shielding layer; wrapping a first protective layer outside the water-blocking tape wrapping layer; arranging a first metal armor layer outside the first protective layer, and combining an optical fiber unit in the gap of the first metal armor layer; and sequentially arranging an inner lining layer, a second metal armor layer, and an outer sheath layer outside the first metal armor layer.

[0015] In a possible implementation, the water-blocking glue is filled in the twisted gap between the metal filaments, comprising the following steps: filling the water-blocking glue in the twisted gap between the metal filaments by using a glue coating system, wherein the glue coating system comprises a glue coating die and at least one glue storage tank for storing the water-blocking glue; the glue coating die is internally provided with a glue coating channel, so that the conductor can pass through the glue coating channel; each of the glue storage tanks is provided with a glue delivery pipe and an air pipe, the glue storage tank is connected to the glue coating channel through the glue delivery pipe, the air pipe is connected to the glue storage tank, one end of the glue delivery pipe extending into the water-blocking glue, and one end of the air pipe extending out of the water-blocking glue, so that the water-blocking glue is pressed into the glue coating channel and coated in the twisted gap between the metal filaments by inputting gas into the glue storage tank through the air pipe.

[0016] In a possible implementation, the step of combining the optical fiber unit in the gap of the first metal armor layer comprises: feeding the optical fiber unit by using a pay-off device, and then combining the optical fiber unit into the first metal armor layer, wherein the pay-off device comprises a rack, a protection tube, and at least one pair of pressure roller assemblies; each pressure roller assembly comprises a mounting seat and a pressure roller rotatably arranged on the mounting seat, the mounting seat is arranged on the rack, two pressure rollers in the same pair are used to clamp the optical fiber unit, at least one pressure roller is provided with a control member for controlling rotation of the pressure roller, so as to feed the optical fiber unit when the pressure roller rotates; the protection tube is provided with a feeding channel for the optical fiber unit to pass through, so that the optical fiber unit is fed inside the protection tube.

[0017] In a possible implementation, in the same pair of pressure roller assemblies, at least one mounting seat is slidingly arranged on the rack, so as to adjust the distance between the two pressure rollers in the same pair.

[0018] The submarine cable and the manufacturing method provided by the embodiment of the present application, wherein the submarine cable is provided with a water-blocking conductor and a conductor shielding layer, an insulation layer, an insulation shielding layer, a water-blocking tape wrapping layer, a first protective layer, a first metal armor layer, an optical fiber unit, an inner liner layer and an outer sheath layer which are sequentially wrapped outside the water-blocking conductor; the water-blocking conductor comprises a conductor, water-blocking glue and a water-blocking tape, the conductor is made of at least two metal filaments which are twisted with each other, the water-blocking glue is filled in the twisted gap between the metal filaments, and the water-blocking tape is wrapped around the conductor and the water-blocking glue. Thus, when in use, the submarine cable realizes the transmission function of electric signals through the water-blocking conductor and realizes the optical signal transmission function through the optical fiber unit, and the conductor shielding layer, the insulation layer, the insulation shielding layer, the water-blocking tape wrapping layer, the first protective layer, the first metal armor layer, the inner liner layer and the outer sheath layer all have a good protective effect on the water-blocking conductor or the optical fiber unit, and at the same time have a strong electromagnetic shielding performance, so that the submarine cable can stably and reliably work in a complex and harsh marine environment, thereby facilitating to meet the deep-sea demand; in addition, for the water-blocking conductor, the metal filaments are twisted, the water-blocking glue is filled in the twisted gap, and the water-blocking tape wraps the whole conductor and water-blocking glue, so that the water-blocking tape and the water-blocking glue are fully combined, the metal filaments are more closely twisted, the water-blocking performance and stability of the water-blocking conductor are improved, thereby facilitating the water-blocking conductor and the submarine cable as a whole to meet the requirement of 1000m and above water depth, and solving the problem that the submarine cable in the prior art is difficult to meet the deep-sea application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort under the premise of no creative effort. The accompanying drawings are incorporated into the description and form part of the description, show embodiments consistent with the present application, and together with the description serve to explain the principles of the present application.

[0020] Fig. 1 is a structural schematic diagram of a submarine cable provided by an embodiment of the present application;

[0021] Fig. 2 is a structural schematic diagram of a glue coating system in a manufacturing method provided by an embodiment of the present application;

[0022] Fig. 3 is a structural schematic diagram of a wire laying device in a manufacturing method provided by an embodiment of the present application.

[0023] Through the above-mentioned accompanying drawings, the specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These accompanying drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0024] Legend of reference numerals: 100 - water-blocking conductor; 200 - conductor shielding layer; 300 - insulation layer; 400 - insulation shielding layer; 500 - water-blocking tape wrapping layer; 600 - first protective layer; 610 - metal protective layer; 620 - polyethylene protective layer; 700 - first metal armor layer; 800 - optical fiber unit; 900 - inner lining layer; 1000 - outer covering layer; 1100 - filling protective layer; 1200 - second metal armor layer; 1300 - glue coating system; 1310 - glue coating die; 1311 - glue coating channel; 1320 - glue storage tank; 1321 - glue conveying pipe; 1322 - air pipe; 1400 - wire laying device; 1410 - rack; 1420 - protective pipe; 1430 - pressure roller assembly; 1431 - mounting seat; 1432 - pressure roller; 1433 - adjusting screw rod. DETAILED DESCRIPTION

[0025] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the present application and how the technical solutions in the present application solve the above technical problems will be described clearly and completely below in combination with specific embodiments and drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described repeatedly in some embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] The terms "first", "second", "third", "fourth" and the like in the description, claims, and drawings of the present application (if any) are used to distinguish similar objects, and do not necessarily have to be used to describe a particular sequential or chronological order. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented, for example, in an order other than that illustrated or described herein.

[0027] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean example, instance, or illustration. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or advantageous than other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a particular manner.

[0028] In the related art, the water blocking of the inner conductor of the submarine cable mainly uses a water blocking tape or a conventional water blocking glue type, which is generally applied to a water depth of 500 meters or less. The existing industrialized submarine cable is usually applied to a water depth of 100 meters or less.

[0029] However, the water blocking performance and stability of the above submarine cable are low, and it is difficult to meet the deep sea application, and it is difficult to break through the application in a water depth of 1000 meters or more.

[0030] Thus, the embodiment of the present application provides a submarine cable and a manufacturing method, by arranging a water-blocking conductor and a conductor shielding layer, an insulation layer, an insulation shielding layer, a water-blocking tape wrapping layer, a first protective layer, a first metal armor layer, an optical fiber unit, an inner liner layer and an outer sheath layer wrapped outside the water-blocking conductor in sequence; the water-blocking conductor comprises a conductor, water-blocking glue and a water-blocking tape, the conductor is made of at least two metal filaments twisted with each other, the water-blocking glue is filled in the twisted gap between the metal filaments, and the water-blocking tape is wrapped around the conductor and the water-blocking glue; thus, when in use, the submarine cable realizes the transmission function of electric signals through the water-blocking conductor, realizes the optical signal transmission function through the optical fiber unit, and the conductor shielding layer, the insulation layer, the insulation shielding layer, the water-blocking tape wrapping layer, the first protective layer, the first metal armor layer, the inner liner layer and the outer sheath layer all have a better protection effect on the water-blocking conductor or the optical fiber unit, and at the same time have a strong electromagnetic shielding performance, so that the submarine cable can work stably and reliably in a complex and harsh marine environment, thereby facilitating to meet the deep sea demand; in addition, for the water-blocking conductor, the metal filaments are twisted, the water-blocking glue is filled in the twisted gap, and the water-blocking tape wraps the whole conductor and the water-blocking glue, so that the water-blocking tape and the water-blocking glue are fully combined, the metal filaments are more closely twisted, the water-blocking performance and stability of the water-blocking conductor are improved, thereby facilitating the water-blocking conductor and the submarine cable as a whole to meet the requirement of 1000m and above water depth, and solving the problem that the submarine cable in the prior art is difficult to meet the deep sea application.

[0031] The technical solutions of the present application will be described in detail below in combination with the drawings and specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments.

[0032] As shown in FIG. 1, the embodiment of the present application provides a submarine cable, comprising a water-blocking conductor 100 and a conductor shielding layer 200, an insulation layer 300, an insulation shielding layer 400, a water-blocking tape wrapping layer 500, a first protective layer 600, a first metal armor layer 700, an optical fiber unit 800, an inner liner layer 900, a second metal armor layer 1200 and an outer sheath layer 1000 wrapped outside the water-blocking conductor 100 in sequence; the water-blocking conductor 100 comprises a conductor, water-blocking glue and a water-blocking tape, the conductor is made of at least two metal filaments twisted with each other, the water-blocking glue is filled in the twisted gap between the metal filaments, and the water-blocking tape is wrapped around the conductor and the water-blocking glue.

[0033] In the embodiments of the present application, the conductor is made of copper and aluminum monofilaments twisted with each other. Of course, the conductor can also be made of other materials or other numbers of monofilaments twisted with each other, which is not limited. Secondly, the water-blocking glue is coated on the conductor, so that the water-blocking glue fully enters the twisted gap between the monofilaments, and then the water-blocking tape is wrapped on the whole of the conductor and the water-blocking glue, so as to form the water-blocking conductor 100. The water-blocking conductor 100 made in this way is fully combined with the water-blocking glue and the water-blocking tape, greatly improves the tightness of the conductor after twisting, thereby improving the waterproof performance and stability of the water-blocking conductor 100 itself, and facilitating the adaptation to the water depth of 1000 m and above.

[0034] It should be noted that the conductor shielding layer 200 can be made by wrapping the water-blocking conductor 100 with the high-resistance seawater water-blocking tape and extruding the super-smooth semi-conductive material outside the high-resistance seawater water-blocking tape; the insulation layer 300 can be made by extruding the super-clean cross-linked polyethylene insulation material outside the conductor shielding layer 200; and the insulation shielding layer 400 can be made by extruding the super-smooth semi-conductive material outside the insulation layer 300. The super-smooth semi-conductive material is, for example, graphene, silicon nano material, carbon nano material or molybdenum disulfide. In actual implementation, the conductor shielding layer 200, the insulation layer 300 and the insulation shielding layer 400 can be extruded at the same time.

[0035] The water-blocking tape wrapping layer 500 can be made by wrapping the insulation shielding layer 400 with the seawater-resistant high-resistance water-blocking semi-conductive tape. In actual implementation, in order to ensure the water-blocking performance of the submarine cable and the influence of thermal expansion during the operation of the cable core, the water-blocking tape wrapping layer 500 can be wrapped with four layers, and of course, the water-blocking tape wrapping layer 500 can also be set to other numbers.

[0036] As shown in FIG. 1, the first protective layer 600 includes a metal protective layer 610 and a polyethylene protective layer 620. The metal protective layer 610 can be made by extruding the alloy lead sheath outside the water-blocking tape wrapping layer 500. At this time, the above-mentioned opposite-seam wrapping of the water-blocking tape wrapping layer 500 is also beneficial to ensuring the flatness of the surface of the water-blocking tape wrapping layer 500, and further facilitating the extrusion effect of the alloy lead sheath. The polyethylene protective layer 620 can be made by extruding the insulation type polyethylene or semi-conductive polyethylene outside the metal protective layer 610.

[0037] The inner lining layer 900 can be made by winding the polypropylene rope outside the first metal armor layer 700 or the optical fiber unit 800. The outer sheath layer 1000 can be made by winding the polypropylene rope and coating the anticorrosive asphalt on the outside.

[0038] In other embodiments, the materials of the conductor shielding layer 200, the insulation layer 300, the insulation shielding layer 400, the water-blocking tape wrapping layer 500, the first protective layer 600, the first metal armor layer 700, the optical fiber unit 800, the inner lining layer 900, and the outer sheath layer 1000 can be reasonably selected according to actual needs, and the selection is not limited.

[0039] It should be noted that the second metal armor layer 1200 can further provide strong mechanical protection for the water-blocking conductor 100 and the optical fiber unit 800, and reduce the possibility of physical damage to the submarine cable as a whole.

[0040] In use, the submarine cable realizes the transmission function of electrical signals through the water-blocking conductor 100 and realizes the transmission function of optical signals through the optical fiber unit 800. The conductor shielding layer 200, the insulation layer 300, the insulation shielding layer 400, the water-blocking tape wrapping layer 500, the first protective layer 600, the first metal armor layer 700, the inner lining layer 900, and the outer sheath layer 1000 all have a good protective effect on the water-blocking conductor 100 or the optical fiber unit 800, and have strong electromagnetic shielding performance, so that the submarine cable can work stably and reliably in a complex and harsh marine environment, thereby facilitating the deep-sea requirements. In addition, for the water-blocking conductor 100, after the metal monofilaments are twisted, the water-blocking glue is filled in the twisted gap, and the water-blocking tape wraps the whole conductor and the water-blocking glue, so that the water-blocking tape and the water-blocking glue are fully combined, the metal monofilaments are twisted more tightly, the water-blocking performance and stability of the water-blocking conductor 100 are improved, and thus the water-blocking conductor 100 and the submarine cable as a whole can meet the requirements of 1000m and above water depth, thereby solving the problem that the submarine cable in the prior art is difficult to meet the deep-sea application.

[0041] Further, in the water-blocking conductor 100, the water-blocking tape includes a seawater-resistant water-blocking tape, and the thickness of the water-blocking tape is 0.3±0.03mm; the viscosity of the water-blocking glue is 200000-300000mpa·s at 25℃.

[0042] Specifically, the water-blocking tape can adopt a seawater-resistant water-blocking tape, and the content of water-blocking powder is appropriately increased during production, so that the thickness of the water-blocking tape is 0.3±0.03mm, and the water-blocking tape reaches ≥5mm in expansion height per 1 minute and ≥8mm in expansion height per 5 minutes in a simulated seawater environment, i.e., in a saltwater environment. The water-blocking glue adopts a high-viscosity water-blocking glue, i.e., the viscosity is 200000-300000mpa·s at 25℃; in actual implementation, when the water-blocking glue is coated on the conductor, the thickness of the water-blocking glue can be controlled to be between 0.1mm and 0.5mm.

[0043] Thus, the waterproof performance, reliability and adaptability of the water-blocking conductor 100 can be enhanced, ensuring its long-term stable operation in deep-sea applications. In addition, enhancing the waterproof performance and extending the service life of the cable can also reduce the failure and maintenance requirements caused by moisture penetration, reducing the operation and maintenance costs.

[0044] As shown in FIG. 1, in some embodiments, the submarine cable further comprises at least two filling protection layers 1100, the filling protection layers 1100 and the optical fiber unit 800 are both compounded in the first metal armor layer 700, and each filling protection layer 1100 is distributed on both sides of the optical fiber unit 800 for protecting the optical fiber unit 800.

[0045] In use, the composite design of the filling protection layer 1100 and the optical fiber unit 800 provides multi-level protection for the optical fiber unit 800, ensuring the safety and stability of the optical fiber unit 800 in various environments.

[0046] Specifically, the filling protection layer 1100 comprises a first metal wire and a second protective layer, the second protective layer is extruded outside the first metal wire, and the optical fiber unit 800 is in contact with the second protective layer.

[0047] The first metal wire can be an aluminum alloy wire, preferably an aluminum alloy wire with a tensile strength of 450 MPa to 600 MPa and an elongation of ≥10%; the second protective layer can be made of high-density polyethylene extruded outside the first metal wire. Of course, the first metal wire and the second protective layer can also be made of other materials. When the optical fiber unit 800 and the filling protection layer 1100 are compounded together in the first metal armor layer 700, the optical fiber unit 800 is in full contact with the second protective layer in the filling protection layer 1100, which can reduce the stress on the optical fiber unit 800 generated by the first metal armor layer 700 during the armor process, further protecting the optical fiber unit 800.

[0048] Further, the optical fiber unit 800 comprises an optical fiber main body and an optical fiber protective layer wrapped outside the optical fiber main body.

[0049] In actual implementation, the optical fiber protective layer can also be a semi-conductive polyethylene outer protective layer, thereby protecting the optical fiber main body itself through the semi-conductive polyethylene outer protective layer, ensuring the safety of the optical fiber unit 800 during installation in the submarine cable and reducing the possibility of damage to the optical fiber main body.

[0050] In actual implementation, the filling protection layer 1100 and the optical fiber unit 800 can be combined into a composite unit, and then a plurality of composite units are compounded in the first metal armor layer 700, the specific number of which can be determined according to actual needs.

[0051] As shown in FIG. 1, in some embodiments, the first metal armor layer 700 includes second metal wires wound outside the first sheath layer 600, and the second metal armor layer 1200 includes third metal wires wound outside the inner liner layer 900; the second metal wires and the third metal wires are arranged in different winding directions.

[0052] The second metal wires can be round zinc-plated steel wires, stainless steel wires or copper wires, so that the second metal wires are wound outside the first sheath layer 600 to form the first metal armor layer 700. In actual production, the filler protection layer 1100 and the optical fiber unit 800 can be filled in the gaps between the second metal wires to achieve the purpose of combining the filler protection layer 1100 and the optical fiber unit 800 with the first metal armor layer 700.

[0053] The third metal wires can be round zinc-plated steel wires, stainless steel wires or copper wires, or flat zinc-plated steel wires, stainless steel wires or copper wires; the third metal wires are wound outside the inner liner layer 900 to form the second metal armor layer 1200.

[0054] At this time, the winding direction of the second metal wires is arranged to be different from the winding direction of the third metal wires, so that the internal stress and torque of the submarine cable are balanced after the first metal armor layer 700 and the second metal armor layer 1200 are arranged, and the stability of the submarine cable is ensured, so as to be suitable for deep-sea complex environment.

[0055] In summary, the embodiment of the present application provides a submarine cable. In use, the submarine cable realizes the transmission function of electrical signals through the water-blocking conductor 100, and realizes the optical signal transmission function through the optical fiber unit 800. In addition, the conductor shielding layer 200, the insulating layer 300, the insulating shielding layer 400, the water-blocking tape wrapping layer 500, the first sheath layer 600, the first metal armor layer 700, the inner liner layer 900 and the outer sheath layer 1000 all have good protective effect on the water-blocking conductor 100 or the optical fiber unit 800, and have strong electromagnetic shielding performance, so that the submarine cable can work stably and reliably in complex and harsh marine environment, thereby facilitating to meet the deep-sea demand. In addition, for the water-blocking conductor 100, after the metal monofilaments are twisted, the water-blocking glue is filled in the twisted gap, and the water-blocking tape wraps the whole conductor and the water-blocking glue, so that the water-blocking tape and the water-blocking glue are fully combined, the metal monofilaments are more closely twisted, the waterproof performance and stability of the water-blocking conductor 100 are improved, thereby facilitating the water-blocking conductor 100 and the submarine cable to meet the requirement of 1000m and above water depth, and solving the problem that the submarine cable in the prior art is difficult to meet the deep-sea application.

[0056] The embodiment of the present application also provides a manufacturing method of the submarine cable applied to any one of the above embodiments, which includes the following steps:

[0057] The at least two metal filaments are twisted to form the conductor, the water-blocking glue is filled in the twisted gap between the metal filaments, and the water-blocking tape is wrapped around the conductor and the water-blocking glue to form the water-blocking conductor 100;

[0058] The conductor shielding layer 200 is wrapped around the water-blocking conductor 100;

[0059] The insulation layer 300, the insulation shielding layer 400 and the water-blocking tape wrapping layer 500 are sequentially arranged outside the conductor shielding layer 200;

[0060] The first protective layer 600 is wrapped around the water-blocking tape wrapping layer 500;

[0061] The first metal armor layer 700 is arranged outside the first protective layer 600, and the optical fiber unit 800 is compounded in the gap of the first metal armor layer 700;

[0062] The inner lining layer 900, the second metal armor layer 1200 and the outer sheath layer 1000 are sequentially arranged outside the first metal armor layer 700.

[0063] Thus, the water-blocking conductor 100 is combined by the water-blocking tape and the water-blocking glue, so that the metal filaments are more closely twisted, the waterproof performance and stability of the water-blocking conductor 100 are improved, and the water-blocking conductor 100 and the submarine cable as a whole can meet the requirement of 1000 m and above water depth, thereby solving the problem that the submarine cable in the prior art is difficult to meet the deep sea application.

[0064] As shown in FIG. 2, in some embodiments, the water-blocking glue is filled in the twisted gap between the metal filaments, including:

[0065] The water-blocking glue is filled in the twisted gap between the metal filaments by using a glue coating system 1300, wherein the glue coating system 1300 includes a glue coating die 1310 and at least one glue storage tank 1320 for storing the water-blocking glue; the glue coating die 1310 is internally provided with a glue coating channel 1311 to enable the conductor to pass through the glue coating channel 1311; each glue storage tank 1320 is provided with a glue delivery pipe 1321 and an air pipe 1322, the glue storage tank 1320 is connected in communication with the glue coating channel 1311 through the glue delivery pipe 1321, the air pipe 1322 is connected in communication with the glue storage tank 1320, one end of the glue delivery pipe 1321 extending towards the glue storage tank 1320 is immersed in the water-blocking glue, and one end of the air pipe 1322 extending towards the glue storage tank 1320 is located outside the water-blocking glue, so as to input gas into the glue storage tank 1320 through the air pipe 1322 to press the water-blocking glue into the glue coating channel 1311 and coat the water-blocking glue in the twisted gap between the metal filaments.

[0066] It should be noted that the glue storage tank 1320 can be set in different numbers according to different types of water-blocking glue, and the number is not limited, so that different types of water-blocking glue are stored in different glue storage tanks 1320, and then the water-blocking glue is input into the glue coating channel 1311 on the glue coating die 1310, and then coated on the conductor to achieve the purpose of coating the twisted gap between the metal filaments.

[0067] It can be understood that the air pipe 1322 can be connected to an air pump or an air compressor at one end away from the glue storage tank 1320, so that high-pressure gas is input into the air pipe 1322 through the air pump or the air compressor, and then the water-blocking glue in the glue storage tank 1320 is pressed out from the glue conveying pipe 1321 through the high-pressure gas, so as to be smoothly conveyed into the glue coating channel 1311.

[0068] In work, the conductor after the mutual twisting of the metal filaments is passed through the glue coating die 1310, so that the conductor gradually passes through the glue coating channel 1311. Then, high-pressure gas is input into the glue storage tank 1320 through the air pipe 1322, so that the water-blocking glue in the glue storage tank 1320 is input into the glue coating channel 1311 through the glue conveying pipe 1321 and coated on the conductor, so that the water-blocking glue is filled in the twisted gap between the metal filaments.

[0069] In actual implementation, for example, a flow regulating valve and / or an electromagnetic valve can be installed on each glue conveying pipe 1321, and of course other valves can also be installed; a proportional valve, an electromagnetic valve or other valves are installed on the air pipe 1322, so that the glue conveying pipe 1321 or the air pipe 1322 is more accurately controlled through the valves, and the use effect and the automation degree of the glue coating system 1300 are improved.

[0070] As shown in FIG. 3, in some embodiments, the optical fiber unit 800 is compounded in the gap of the first metal armor layer 700, which includes:

[0071] The wire laying device 1400 is used to convey the optical fiber unit 800, and then the optical fiber unit 800 is compounded into the first metal armor layer 700. The wire laying device 1400 includes a rack 1410, a protection pipe 1420, and at least one pair of pressure roller assemblies 1430. The pressure roller assembly 1430 includes a mounting seat 1431 and a pressure roller 1432 rotatably arranged on the mounting seat 1431. The mounting seat 1431 is arranged on the rack 1410, and the two pressure rollers 1432 of the same pair clamp the optical fiber unit 800. At least one pressure roller 1432 is provided with a control member for controlling the rotation of the pressure roller 1432, so as to pull the optical fiber unit 800 to convey when the pressure roller 1432 rotates. The protection pipe 1420 forms a conveying channel for the optical fiber unit 800 to pass through, so that the optical fiber unit 800 is conveyed inside the protection pipe 1420.

[0072] In the embodiment of the present application, the pressure wheel assembly 1430 is arranged as a pair, wherein the mounting seat 1431 is arranged on the rack 1410, the mounting seat 1431 is provided with a connecting arm, and the pressure wheel 1432 is rotationally arranged on the connecting arm. The two pressure wheel assemblies 1430 are vertically distributed, and the rotation axis of the pressure wheel 1432 extends horizontally, so that the two pressure wheels 1432 have a gap for the optical fiber unit 800 to pass through. In addition, at least one pressure wheel 1432 is provided with a control member, which is not shown in the figure. The control member can be a motor, and the model is not limited, so that the output shaft of the motor can be connected with the pressure wheel 1432 through gears, pulleys or other ways, and then the rotation of the pressure wheel 1432 can be controlled by the motor. In the embodiment of the present application, both of the two pressure wheels 1432 are provided with control members.

[0073] In use, one end of the optical fiber unit 800 is inserted between the two pressure wheels 1432, and then the rotation of the pressure wheel 1432 is controlled, so that the optical fiber unit 800 is driven to move under the action of the frictional resistance between the pressure wheel 1432 and the optical fiber unit 800, thereby achieving the purpose of conveying the optical fiber unit 800.

[0074] The protection tube 1420 can be fixed to the rack 1410, or can be fixed to the ground or other surrounding objects, which is not limited. The extension direction of the protection tube 1420 is consistent with the conveying path of the optical fiber unit 800, so that the optical fiber unit 800 can pass through the conveying channel inside the protection tube 1420, and then the conveying process of the optical fiber unit 800 is protected by the protection tube 1420, thereby reducing the possibility of damage to the optical fiber unit 800.

[0075] As shown in FIG. 3, further, in the same pair of pressure wheel assemblies 1430, at least one mounting seat 1431 is slidingly arranged on the rack 1410, so as to adjust the distance between the two pressure wheels 1432 in the same pair.

[0076] In the embodiment of the present application, in the two pressure wheel assemblies 1430, each mounting seat 1431 is slidingly arranged on the rack 1410 in a vertical direction. The mounting seat 1431 is further rotationally connected with a vertically extending adjusting screw 1433, and the adjusting screw 1433 is threadedly connected with the rack 1410. In use, the rotation of the adjusting screw 1433 can drive the mounting seat 1431 to slide, so as to adjust the gap between the two pressure wheels 1432, so as to adapt to optical fiber units 800 of different diameters for use.

[0077] In other embodiments, the adjusting screw can also be replaced by an air cylinder or a hydraulic cylinder, so that the sliding of the mounting seat 1431 relative to the rack 1410 can be controlled by the air cylinder or the hydraulic cylinder.

[0078] In summary, the embodiment of the present application provides a manufacturing method, by fully combining the water-blocking tape and the water-blocking glue, the metal monofilament is more closely twisted, the waterproof performance and stability of the water-blocking conductor 100 are improved, and then the water-blocking conductor 100 and the submarine cable as a whole meet the requirement of 1000m and above water depth, and the problem that the submarine cable in the prior art is difficult to meet the deep sea application is solved.

[0079] So far, the technical solution of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solution recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

[0080] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the content of the present application. The present application is not limited to the precise structures described and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as illustrative only, and the scope of the application is to be limited solely by the appended claims.

Claims

1. A submarine cable, characterized in that, The water-blocking conductor (100) and the conductor shielding layer (200), the insulating layer (300), the insulating shielding layer (400), the water-blocking tape wrapping layer (500), the first protective layer (600), the first metal armor layer (700), the optical fiber unit (800), the inner lining layer (900), the second metal armor layer (1200) and the outer covering layer (1000) are sequentially wrapped outside the water-blocking conductor (100); The water-blocking conductor (100) comprises a conductor, water-blocking glue and a water-blocking tape, the conductor is made of at least two metal filaments twisted with each other, the water-blocking glue is filled in the twisted gap between the metal filaments, and the water-blocking tape is wrapped around the conductor and the water-blocking glue.

2. Submarine cable according to claim 1, characterized in that, The water-blocking tape comprises a water-blocking tape of a type of resisting seawater, and the thickness of the water-blocking tape is 0.3±0.03 mm. The viscosity of the water-blocking glue is 200000-300000 mpa·s at 25 DEG C.

3. Submarine cable according to claim 1, characterized in that, The filling protective layer (1100) and the optical fiber unit (800) are both compounded in the first metal armor layer (700), and each filling protective layer (1100) is distributed on both sides of the optical fiber unit (800) to protect the optical fiber unit (800).

4. A submarine cable according to claim 3, characterised in that, The filling protective layer (1100) comprises a first metal wire and a second protective layer, the second protective layer is extruded and wrapped outside the first metal wire, and the optical fiber unit (800) is in contact with the second protective layer.

5. A submarine cable according to claim 3, characterised in that, The optical fiber unit (800) comprises an optical fiber main body and an optical fiber protective layer wrapped outside the optical fiber main body.

6. A submarine cable according to claim 1, characterised in that, The first metal armor layer (700) comprises a second metal wire wound outside the first protective layer (600), and the second metal armor layer (1200) comprises a third metal wire wound outside the inner lining layer (900). The second metal wire and the third metal wire are arranged in different winding directions.

7. A method of manufacturing a submarine cable according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: At least two metal filaments are twisted with each other to make a conductor, water-blocking glue is filled in the twisted gap between the metal filaments, and a water-blocking tape is wrapped around the conductor and the water-blocking glue to form a water-blocking conductor (100); A conductor shielding layer (200) is wrapped outside the water-blocking conductor; An insulating layer (300), an insulating shielding layer (400) and a water-blocking tape wrapping layer (500) are sequentially arranged outside the conductor shielding layer (200); A first protective layer (600) is wrapped outside the water-blocking tape wrapping layer (500); A first metal armor layer (700) is arranged outside the first protective layer (600), and an optical fiber unit (800) is compounded in the gap of the first metal armor layer (700); An inner lining layer (900), a second metal armor layer (1200) and an outer covering layer (1000) are sequentially arranged outside the first metal armor layer (700).

8. The production method according to claim 7, wherein The water-blocking glue filled in the twisted gap between the metal filaments comprises: The water-blocking glue is filled in the twisting gap between the metal monofilaments by using a glue coating system (1300), wherein the glue coating system (1300) comprises a glue coating die (1310) and at least one glue storage tank (1320) for storing the water-blocking glue; The glue coating die (1310) is internally provided with a glue coating channel (1311) to enable the conductor to pass through the glue coating channel (1311); Each of the glue storage tanks (1320) is provided with a glue conveying pipe (1321) and an air pipe (1322), the glue storage tank (1320) is connected with the glue coating channel (1311) through the glue conveying pipe (1321), the air pipe (1322) is connected with the glue storage tank (1320), one end of the glue conveying pipe (1321) towards the glue storage tank (1320) is inserted into the water-blocking glue, and one end of the air pipe (1322) towards the glue storage tank (1320) is located outside the water-blocking glue to input gas into the glue storage tank (1320) through the air pipe (1322) to press the water-blocking glue into the glue coating channel (1311) and coat the water-blocking glue on the twisting gap between the metal monofilaments.

9. The production method according to claim 7, wherein The composite optical fiber unit (800) in the gap of the first metal armor layer (700) comprises: The optical fiber unit (800) is conveyed by using a wire laying device (1400) and then is compounded into the first metal armor layer (700), wherein the wire laying device (1400) comprises a rack (1410), a protection tube (1420) and at least one pair of pressure roller assemblies (1430); The pressure roller assembly (1430) comprises a mounting seat (1431) and a pressure roller (1432) rotatably arranged on the mounting seat (1431), the mounting seat (1431) is arranged on the rack (1410), the same pair of two pressure rollers (1432) clamp the optical fiber unit (800), at least one pressure roller (1432) is provided with a control member for controlling the rotation of the pressure roller (1432) to pull the optical fiber unit (800) to convey when the pressure roller (1432) rotates; The protection tube (1420) forms a conveying channel for the optical fiber unit (800) to pass through to enable the optical fiber unit (800) to be conveyed inside the protection tube (1420).

10. The manufacturing method according to claim 9, wherein In the same pair of pressure roller (1432) assemblies, at least one mounting seat (1431) is slidingly arranged on the rack (1410) to adjust the distance between the same pair of two pressure rollers (1432).

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