Armored submarine cable and method of manufacturing armored submarine cable

Abstract

The application provides a sheathed submarine cable and a manufacturing method thereof. The sheathed submarine cable comprises a main cable, at least one branch cable and at least one sheathed clamp. The sheathed clamp is sleeved on the outer side of the main cable. The sheathed clamp is provided with a through hole. The branch cable is arranged in the through hole and connected with the main cable. The connection part of the main cable and the branch cable in the sheathed clamp is provided with a sealing layer. The outer circumferential side of the main cable is provided with a plurality of sheathed steel wires. The outer circumferential side of the sheathed clamp is provided with a plurality of grooves. The through hole is arranged in a protruding part between two adjacent grooves. The plurality of sheathed steel wires are uniformly distributed in the grooves. The submarine cable has good sealing integrity and mechanical continuity. One submarine cable can be connected with a plurality of terminal devices at different positions at the same time, which is beneficial to reduce the submarine line layout density, reduce the construction and post-maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submarine cable manufacturing, in particular to an armored submarine cable and a manufacturing method thereof. BACKGROUND

[0002] With the development of marine economy, the submarine optical transmission system often needs to connect multiple terminal devices at different locations to realize multiple functions. At present, for such a cable system with multiple functional nodes, the widely adopted method is to lay multiple submarine cables according to the line requirements, which not only increases the production and laying cost, but also increases the network density, causing congestion of the submarine cable route.

[0003] In order to solve the above problems, the related technical scheme proposes to use a branch device to branch the power and optical fiber lines in the submarine cable. Although this can reduce the submarine cable laying cost, the branch device usually needs to be made on site on the construction ship, which consumes a long construction time, and destroys the continuity of the mechanical properties of the submarine cable. The sealing and mechanical protection at the branch are also the weakest, which is prone to failure, and the construction and post-maintenance costs are high. SUMMARY

[0004] In order to overcome the above defects in the related art, the purpose of the present application is to provide an armored submarine cable and a manufacturing method thereof. The present application can complete the production of the submarine cable in the factory, and the mechanical continuity and sealing of the submarine cable are good, which is beneficial to reduce the submarine line network density and reduce the construction and post-maintenance costs.

[0005] In one aspect, the present application provides an armored submarine cable, comprising a main cable, at least one branch cable and at least one armored clamp, the armored clamp is sleeved on the outside of the main cable, the armored clamp is provided with a through hole, the branch cable is arranged in the through hole and connected with the main cable, and a sealing layer is arranged at the connection between the main cable and the branch cable in the armored clamp.

[0006] The outer periphery of the main cable is provided with a plurality of armored steel wires, the outer periphery of the armored clamp is provided with a plurality of grooves, the through hole is arranged in the protruding part between two adjacent grooves, and the plurality of armored steel wires are uniformly distributed in the grooves.

[0007] The present application sets a sealing layer at the connection between the main cable and the branch cable to ensure the sealing integrity of the submarine cable. The armored clamp is arranged outside the sealing layer, the armored clamp comprises a plurality of grooves, the through hole is arranged in the protruding part between two adjacent grooves, the branch cable is arranged out of the through hole, and the plurality of armored steel wires on the outer periphery of the main cable are uniformly distributed in the grooves to ensure the mechanical continuity of the submarine cable, thereby reducing the submarine line network density and reducing the construction and post-maintenance costs.

[0008] The armored submarine cable as claimed in any one of the preceding claims, wherein the outer circumferential side of the armored clamp is provided with a plurality of protrusions, the plurality of protrusions are parallel to each other, the plurality of protrusions are arranged along the axial direction of the main cable, and the recess is formed between two adjacent protrusions.

[0009] The armored submarine cable as claimed in any one of the preceding claims, wherein the armored clamp comprises a first part and a second part arranged oppositely, a part of the through hole is formed on the first part, and another part of the through hole is formed on the second part, and the first part and the second part are connected and fixed to the main cable by the fastener after being butted.

[0010] The armored submarine cable as claimed in any one of the preceding claims, wherein the surface of the armored clamp is provided with two oppositely arranged fixing grooves, the fixing grooves are arranged along the circumferential direction of the main cable, the fastener is clamped and fixed in the fixing grooves, and the plurality of protrusions are located between the two fixing grooves.

[0011] The armored submarine cable as claimed in any one of the preceding claims, wherein the main cable comprises a central reinforcing member, a plurality of power lines, and a plurality of twisted pairs, the central reinforcing member is arranged along the axial direction of the main cable, and the plurality of power lines and the plurality of twisted pairs are twisted outside the central reinforcing member.

[0012] The main cable further comprises a wrapping layer and an inner protective layer, the wrapping layer is sleeved outside the plurality of power lines and the plurality of twisted pairs, the inner protective layer is sleeved outside the wrapping layer, and the plurality of armored steel wires are twisted outside the inner protective layer.

[0013] The armored submarine cable as claimed in any one of the preceding claims, wherein the plurality of armored steel wires are twisted at least two turns outside the inner protective layer.

[0014] The armored submarine cable as claimed in any one of the preceding claims, wherein the main cable is provided with at least one avoiding groove, the avoiding groove penetrates through the wrapping layer and the inner protective layer to expose the plurality of power lines and the plurality of twisted pairs.

[0015] After at least one of the power lines or at least one of the twisted pairs is broken, a first joint and a second joint are formed, the first joint and the second joint penetrate through the through hole to form the branch cable.

[0016] The armored submarine cable as claimed in any one of the preceding claims, wherein the sealing layer is arranged in the avoiding groove, the sealing layer is provided with a first threading hole and a second threading hole, and the first joint and the second joint are respectively arranged in the first threading hole and the second threading hole.

[0017] The armored submarine cable as described above, optionally, the length of the avoiding slot is 100-600mm, the length of the sealing layer is 100-300mm longer than the avoiding slot, and the outer diameter of the sealing layer is 1.2-1.5 times of the outer diameter of the inner sheath.

[0018] In another aspect, the application provides an armored submarine cable manufacturing method, comprising:

[0019] providing a main cable, the outer periphery of which is provided with a plurality of armored steel wires;

[0020] providing at least one branch cable, and connecting the branch cable with the main cable;

[0021] preparing a sealing layer at the connection between the main cable and the branch cable;

[0022] providing at least one armored clamp provided with a through hole and a plurality of grooves, the through hole being arranged in a protruding part between two adjacent grooves; sleeving the armored clamp outside the main cable, passing the branch cable through the through hole, and continuously and uniformly twisting the armored steel wires outside the periphery of the main cable and uniformly twisting and distributing the armored steel wires in the grooves.

[0023] The submarine cable manufactured by the armored submarine cable manufacturing method has good sealing property and mechanical continuity, thereby being beneficial to reducing the submarine line layout density, reducing the construction and later maintenance cost.

[0024] The armored submarine cable manufacturing method as described above, optionally, the step of providing at least one branch cable and connecting the branch cable with the main cable comprises:

[0025] circumferentially cutting the main cable to form an avoiding slot, the avoiding slot passing through the binder and the inner sheath to expose a plurality of power lines and a plurality of twisted pairs;

[0026] cutting at least one of the power lines or at least one of the twisted pairs to form a first joint and a second joint, and pulling out the first joint and the second joint from the avoiding slot to form the branch cable.

[0027] The armored submarine cable manufacturing method as described above, optionally, the step of preparing a sealing layer at the connection between the main cable and the branch cable comprises:

[0028] putting the avoiding slot on the main cable into a vulcanization mold provided with a first threading hole and a second threading hole, and threading the first joint and the second joint out of the first threading hole and the second threading hole, respectively;

[0029] pouring sealing material into the vulcanization mold from a glue pouring port of the vulcanization mold for vulcanization;

[0030] removing the vulcanization mold to form the sealing layer at the connection of the main cable and the branch cable.

[0031] The armored submarine cable manufacturing method as described above, optionally, the providing at least one armored clamp, the armored clamp is provided with a through hole and a plurality of grooves, the through hole is opened in the protruding part between two adjacent grooves; the armored clamp is sleeved outside the main cable, the branch cable is passed through the through hole, the armored steel wire is continuously and uniformly stranded on the outer circumferential side of the main cable, and is uniformly stranded and distributed in the groove, comprising:

[0032] The first part and the second part of the armored clamp are attached to the outside of the sealing layer from both sides of the main cable, respectively;

[0033] The branch cable is pulled out from the through hole, and the armored clamp is clamped and fixed with the sealing layer by using the fastener;

[0034] The plurality of armored steel wires are stranded on the outer circumferential side of the main cable, and when the steel wire stranding production reaches the armored clamp, the plurality of armored steel wires are continuously and uniformly stranded in the groove, and after the groove is fully stranded, the steel wires in the groove are continuously armored until the entire length of the main cable is completely covered, and the metal clasp is used to fix and tighten the steel wires in the groove. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0036] Figure 1 The structure diagram of the armored submarine cable provided by an embodiment of the present application;

[0037] Figure 2 The structure diagram of the armored clamp provided by an embodiment of the present application;

[0038] Figure 3 The cross-sectional view of the main cable provided by an embodiment of the present application;

[0039] Figure 4 The cooperation structure diagram of the armored steel wire and part of the armored clamp provided by an embodiment of the present application;

[0040] Figure 5 The structure diagram of the main cable and the branch cable provided by an embodiment of the present application;

[0041] Figure 6A structural diagram of a main cable, a branch cable and a sealing layer provided by an embodiment of the present application is shown in FIG. 1.

[0042] Figure 7 A structural diagram of a vulcanization mold provided by an embodiment of the present application is shown in FIG. 5.

[0043] Figure 8 A flow chart of a manufacturing method of an armored submarine cable provided by an embodiment of the present application is shown in FIG. 6.

[0044] Reference signs:

[0045] 100 - main cable; 101 - avoiding groove; 110 - armored steel wire; 120 - central reinforcing member; 130 - power line; 140 - twisted pair; 150 - wrapping layer; 160 - inner protective layer;

[0046] 200 - branch cable; 210 - first joint; 220 - second joint;

[0047] 300 - armored clamp; 301 - first part; 302 - second part; 310 - through hole; 320 - groove; 330 - protruding part; 340 - fastener; 350 - fixing groove;

[0048] 400 - sealing layer;

[0049] 500 - vulcanization mold; 501 - cavity; 510 - first threading hole; 520 - second threading hole;

[0050] 600 - metal snap ring. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0052] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0053] In the related art, a branch device is used to branch the power and optical fiber lines in a submarine cable, which has the problems of needing to be operated on the sea, poor sealing and mechanical continuity of the submarine cable after branching, and increasing the submarine line layout density.

[0054] In view of the above, the present application aims to provide an armored submarine cable and a manufacturing method thereof, the armored submarine cable comprising a main cable, at least one branch cable and at least one armored clamp, the branch cable being connected to the main cable after passing through the armored clamp, a sealing layer being arranged at the connection between the main cable and the branch cable, a plurality of armored steel wires being arranged on the outer periphery of the main cable, a plurality of grooves being arranged on the outer periphery of the armored clamp, and the plurality of armored steel wires being uniformly distributed in the grooves. The armored submarine cable of the present application can be manufactured in a factory, the sealing layer is arranged at the connection between the main cable and the branch cable, thereby ensuring the sealing integrity of the submarine cable, the armored steel wires continuously and uniformly pass through the connection between the branch cable, thereby ensuring the mechanical continuity of the submarine cable. The present application is conducive to reducing the submarine line layout density and reducing the construction and maintenance costs.

[0055] The content of the embodiments of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can have a more detailed understanding of the content of the present application.

[0056] Figure 1 a structural diagram of the armored submarine cable provided by an embodiment of the present application; Figure 2 a structural diagram of the armored clamp provided by an embodiment of the present application; Figure 3 a sectional view of the main cable provided by an embodiment of the present application; Figure 4 a cooperation structural diagram of the armored steel wire and part of the armored clamp provided by an embodiment of the present application; Figure 5 a structural diagram of the main cable and the branch cable provided by an embodiment of the present application; Figure 6 a structural diagram of the main cable, the branch cable and the sealing layer provided by an embodiment of the present application; Figure 7 a structural diagram of the vulcanization mold provided by an embodiment of the present application.

[0057] Please refer to Figures 1-7 The present embodiment provides an armored submarine cable, which comprises a main cable 100, at least one branch cable 200 and at least one armored clamp 300. The specific number of the branch cable 200 and the armored clamp 300 can be determined according to the needs, and one armored clamp 300 is needed to be installed between each branch cable 200 and the main cable 100. Specifically, the armored clamp 300 is sleeved on the outer side of the main cable 100, the armored clamp 300 is provided with a through hole 310, the branch cable 200 is arranged in the through hole 310 and connected to the main cable 100, and each branch cable 200 can be connected to one terminal device. A sealing layer 400 is arranged at the connection between the main cable 100 and the branch cable 200 in the armored clamp 300. The sealing layer 400 can be made of glue through a vulcanization process, for example, and can ensure the sealing of the connection between the main cable 100 and the branch cable 200.

[0058] The outer periphery of the main cable 100 is provided with a plurality of armored steel wires 110, the outer periphery of the armored clamp 300 is provided with a plurality of grooves 320, the through hole 310 is arranged in one of the protruding portions 330, and the plurality of armored steel wires 110 are uniformly distributed in the grooves 320. In the embodiment, the armored clamp 300 is arranged outside the sealing layer 400, the armored clamp 300 includes a plurality of grooves 320, the through hole 310 is arranged in one of the protruding portions 330, the branch cable is pulled out from the through hole 310, and the plurality of armored steel wires 110 on the outer periphery of the main cable 100 are uniformly distributed in the grooves 320, so that the mechanical continuity of the submarine cable is ensured, and the armored steel wires 110 can avoid cutting the branch cable 200. Since the submarine cable in the embodiment can be pre-processed in the factory, and the submarine cable has good sealing performance and mechanical continuity, the submarine cable is not easy to be damaged, which is beneficial to reduce the submarine line layout density and reduce the construction and maintenance costs.

[0059] In the embodiment, a metal snap ring 600 is further arranged outside the armored clamp 300, and the metal snap ring 600 is used for further clamping and fixing the armored steel wires 110 to prevent the armored steel wires 110 from loosening.

[0060] Please continue to refer to Figure 2 In one possible implementation, the outer periphery of the armored clamp 300 in the embodiment is provided with a plurality of protruding portions 330, the plurality of protruding portions 330 are parallel to each other, the plurality of protruding portions 330 are arranged in the axial direction of the main cable 100, and the grooves 320 are formed between adjacent two protruding portions 330, so that the armored steel wires 110 on the main cable 100 can be placed.

[0061] As shown in Figure 4 Each groove 320 can be provided with a plurality of armored steel wires 110, and the specific number can be selected as required, for example, 4, 5 or 6, etc.

[0062] Further, the armored clamp 300 in the embodiment adopts a half structure, the armored clamp 300 includes a first portion 301 and a second portion 302 arranged oppositely, a part of the through hole 310 is arranged on the first portion 301, and the other part is arranged on the second portion 302, and the first portion 301 and the second portion 302 are connected and fixed with the main cable 100 through the fastener 340 after abutting, so that the armored clamp 300 is prevented from moving and loosening during use. After the armored clamp 300 is abutted, a cavity is formed between the first portion 301 and the second portion 302, and the through hole for the main cable 100 to pass through is arranged on both sides of the cavity. The fastener 340 in the embodiment can include a clamp, a bolt, a nut and the like.

[0063] Specifically, the surface of the armored clamp 300 is provided with two oppositely arranged fixing grooves 350, which are arranged along the circumference of the main cable 100 and generally in the form of a ring; the fastener 340 is clamped and fixed in the fixing groove 350, and the plurality of protruding portions 330 are located between the two fixing grooves 350.

[0064] In the embodiment, the armored clamp 300 can be made of stainless steel, titanium alloy or the like.

[0065] Please continue to refer to Figure 3 In one possible implementation, the main cable 100 of the embodiment includes a central reinforcing member 120, a plurality of power lines 130 and a plurality of twisted pairs 140, the central reinforcing member 120 is arranged along the axial direction of the main cable 100, and the plurality of power lines 130 and the plurality of twisted pairs 140 are twisted outside the central reinforcing member 120.

[0066] The main cable 100 further includes a wrapping layer 150 and an inner protective layer 160, the wrapping layer 150 is sleeved outside the plurality of power lines 130 and the plurality of twisted pairs 140, the inner protective layer 160 is sleeved outside the wrapping layer 150, and the plurality of armored steel wires 110 are twisted outside the inner protective layer 160.

[0067] Optionally, the plurality of armored steel wires 110 in the embodiment are wound at least two turns outside the inner protective layer 160, so as to better protect the mechanical continuity of the submarine cable.

[0068] Please continue to refer to Figure 5 , Figure 5 The structure when the branch cable 200 is directly processed on the main cable 100 is shown. In one possible implementation, the main cable 100 of the embodiment is provided with at least one avoiding groove 101, the avoiding groove 101 passes through the wrapping layer 150 and the inner protective layer 160 to expose the plurality of power lines 130 and the plurality of twisted pairs 140; that is, the avoiding groove 101 of the embodiment is formed after the wrapping layer 150 and the inner protective layer 160 are removed at the designated position on the main cable 100.

[0069] In the embodiment, at least one power line 130 or at least one twisted pair 140 is broken to form a first joint 210 and a second joint 220, the first joint 210 and the second joint 220 pass through the through hole 310 to form the branch cable 200, and when the length of the first joint 210 and the second joint 220 is not enough, a certain length of insulated wire can be pre-connected to the first joint 210 and the second joint 220.

[0070] Please refer to Figure 6Further, the sealing layer 400 of the embodiment is arranged in the avoiding groove 101, the first threading hole and the second threading hole are arranged in the sealing layer 400, and the first joint 210 and the second joint 220 are respectively threaded in the first threading hole and the second threading hole. That is, the sealing layer 400 of the embodiment is directly manufactured in the avoiding groove 101 after the branch cable 200 is manufactured.

[0071] Please continue to refer to Figure 7 , Figure 7 The structure diagram of the vulcanization mold for manufacturing the sealing layer 400 is shown. The vulcanization mold 500 is internally formed with a cavity 501, and the first threading hole 510 and the second threading hole 520 are arranged on the vulcanization mold 500. In use, the avoiding groove 101 is arranged in the cavity 501, and the first joint 210 and the second joint 220 of the branch cable 200 are respectively threaded out of the first threading hole 510 and the second threading hole 520, then the glue is poured from the mold glue pouring port to start vulcanization, and after vulcanization, the mold is demolded to form the sealing layer 400.

[0072] Optionally, the length of the avoiding groove 101 in the embodiment is 100-600 mm. The length of the cavity 501 is 100-300 mm longer than the length of the avoiding groove 101, and the outer diameter is 1.2-1.5 times the outer diameter of the inner protective layer 160.

[0073] Figure 8 The flow chart of the armored submarine cable manufacturing method provided by the embodiment of the application is shown.

[0074] Please refer to Figure 8 The embodiment further provides an armored submarine cable manufacturing method, which comprises the following steps:

[0075] In step S110, a main cable is provided, and a plurality of armored steel wires are arranged on the outer periphery of the main cable.

[0076] The main cable in the embodiment can be manufactured by the following method: first, the power line, the twisted pair and the filler are spirally twisted around the central reinforcing member, and the twisting pitch is preferably 8-25 times the outer diameter after twisting, so as to ensure that the cable is round. Then, the gap between the power line, the twisted pair and the filler is filled with a water-tight filling material to form a water-tight filling layer, so as to ensure the axial water-blocking function. Then, the lapping method can be used to wrap the water-tight filling layer to form a wrapping layer, and the lapping rate is preferably 10%-40%; the inner protective layer is extruded on the wrapping layer to play a radial water-blocking sealing role. Finally, the armored steel wires can be twisted outside the inner protective layer.

[0077] In step S120, at least one branch cable is provided, and the branch cable is connected with the main cable.

[0078] The branch cable in the embodiment can be manufactured by the following method:

[0079] First, the inner sheath of the main cable is ringed to form a bypass slot, the bypass slot passes through the wrapping layer and the inner sheath to expose a plurality of power lines and a plurality of twisted pairs.

[0080] Then, at least one power line or at least one twisted pair of the pre-branch is found, cut and stripped of the inner conductor, thereby forming a first joint and a second joint, and the first joint and the second joint are pulled out of the bypass slot to form a branch cable. If the length of the first joint and the second joint is not enough, a certain length of cable can be pre-connected as a branch cable, and the pre-connection can be by welding, crimping or other equivalent conductor connection method. The pre-connection length can be determined according to engineering application, and the conductor can be insulated by wrapping with insulating tape, heat shrink cap or other equivalent method.

[0081] In this embodiment, since the first joint and the second joint are tapped from the same power line or twisted pair and connected to the same device, the continuity of the electrical performance is ensured.

[0082] Step S130, preparing a sealing layer at the connection between the main cable and the branch cable.

[0083] The sealing layer in this embodiment can be prepared by the following method:

[0084] The bypass slot on the main cable is placed in a vulcanization mold, the vulcanization mold is provided with a first threading hole and a second threading hole, and the first joint and the second joint are respectively threaded out of the first threading hole and the second threading hole.

[0085] The sealing material is poured into the glue pouring port of the vulcanization mold for vulcanization.

[0086] The vulcanization mold is removed to form a sealing layer at the connection between the main cable and the branch cable.

[0087] This embodiment completely wraps and reseals the main cable and the branch cable after ring cutting by the sealing layer, ensuring the sealing integrity of the submarine cable.

[0088] Step S140, providing at least one armor clamp, the armor clamp being provided with a through hole and a plurality of grooves, the through hole being formed in one of the protrusions; the armor clamp is sleeved on the outside of the main cable, the branch cable passes through the through hole, and the armor wire is continuously and uniformly twisted on the outer circumferential side of the main cable and uniformly twisted and distributed in the grooves.

[0089] Specifically, when making, the first part and the second part of the armor clamp can be first attached to the outside of the sealing layer from both sides of the main cable.

[0090] Then, the branch cable is pulled out of the through hole, and the armor clamp is clamped and fixed with the sealing layer by using a fastener.

[0091] Finally, a plurality of the armored steel wires are twisted on the outer circumferential side of the main cable, and the steel wires are continuously and uniformly twisted in the grooves when the steel wires are produced to the armored clamp, the grooves are filled after the steel wires are twisted, and the steel wires in the grooves are fixed and tightened by the metal clasp.

[0092] For example, two layers of armored steel wires are arranged on the outer side of the main cable, a plurality of the armored steel wires are twisted on the outer circumferential side of the main cable by using the armored equipment cage twisting machine, when the first layer of steel wires reaches the twisting point of the armored clamp during the production to the armored clamp, the branch part cannot normally pass through the twisting mold because the size of the armored clamp is much larger than the size of the armored twisting mold, the applicable method is to open the armored twisting mold to release the steel wires, the branch cable is pulled out from the gap between the steel wires to avoid the steel wires from pinching the cable core, then all the steel wires are evenly distributed in the grooves of the armored clamp, after the distribution is completed, it is checked to ensure that there is no steel wire left outside the grooves of the armored clamp, the armored equipment is started, because the groove direction and angle are the same as the steel wire twisting direction and angle, the steel wires are uniformly and closely twisted into the grooves under the action of the wire line tension of the steel wires, thereafter, the steel wires are slowly armored until the grooves are completely covered, after the armored clamp passes through the twisting point, the armored twisting mold is reinstalled to normally twist the steel wires until the steel wires completely cover the entire length of the main cable, and the steel wires in the grooves are fixed and tightened by the metal clasp to prevent twisting or scattering.

[0093] The armored clamp passes through the twisting point of the second layer of armored steel wires, the second layer of armored clamp is installed on the first layer of armored clamp, and the above method can still be used for armored.

[0094] The submarine cable manufactured by the armored submarine cable manufacturing method has good sealing and mechanical continuity, thereby being beneficial to reducing the submarine line layout density, and reducing the construction and later maintenance cost.

[0095] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0096] In the present application, unless specifically defined otherwise, the terms "mounting", "connection", "connecting", "fixed", and like terms should be construed in a broad sense and, for example, can be fixed connection, detachable connection, or integral; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements, or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0097] It should be noted that in the description of the present application, the terms "first", "second" are only used for the convenience of describing different parts, and cannot be understood as indicating or implying the order relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0098] The embodiments or implementations in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0099] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; 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 solutions 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 solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An armoured submarine cable characterised in that, The main cable, at least one branch cable and at least one armored clamp are included, the armored clamp is sleeved outside the main cable, the armored clamp is provided with a through hole, the branch cable is arranged in the through hole and connected with the main cable, and the connection between the main cable and the branch cable in the armored clamp is provided with a sealing layer; The outer circumferential side of the main cable is provided with a plurality of armored steel wires, the outer circumferential side of the armored clamp is provided with a plurality of grooves and a plurality of protruding portions, the plurality of protruding portions are parallel to each other, the plurality of protruding portions are arranged in a stranded manner along the axial direction of the main cable, the through hole is arranged in the protruding portion, and the grooves are formed between the adjacent two protruding portions, the grooving direction of the groove is the same as the stranding direction of the armored steel wire, and the plurality of armored steel wires are uniformly distributed in the groove.

2. An armoured submarine cable according to claim 1, characterised in that, The armored clamp includes oppositely arranged first and second parts, a part of the through hole is arranged on the first part, and the other part is arranged on the second part, and the first and second parts are connected and fixed with the main cable by a fastener after being butted.

3. An armoured submarine cable according to claim 2, characterised in that, The surface of the armored clamp is provided with two oppositely arranged fixing grooves, the fixing grooves are arranged along the circumferential direction of the main cable, the fastener is clamped and fixed in the fixing groove, and the plurality of protruding portions are located between the two fixing grooves.

4. An armoured submarine cable according to any one of claims 1 to 3, characterised in that, The main cable includes a central reinforcing member, a plurality of power lines and a plurality of twisted pairs, the central reinforcing member is arranged along the axial direction of the main cable, and the plurality of power lines and the plurality of twisted pairs are arranged outside the central reinforcing member in a stranded manner; The main cable further includes a wrapping layer and an inner protective layer, the wrapping layer is sleeved outside the plurality of power lines and the plurality of twisted pairs, and the inner protective layer is sleeved outside the wrapping layer, and the plurality of armored steel wires are arranged outside the inner protective layer in a stranded manner.

5. An armoured submarine cable according to claim 4, characterised in that, The plurality of armored steel wires are arranged outside the inner protective layer in at least two turns.

6. An armoured submarine cable according to claim 4, characterised in that, At least one avoiding groove is arranged on the main cable, the avoiding groove passes through the wrapping layer and the inner protective layer to expose the plurality of power lines and the plurality of twisted pairs; After at least one of the power lines or the twisted pairs is broken, a first joint and a second joint are formed, the first joint and the second joint pass through the through hole to form the branch cable.

7. An armoured submarine cable according to claim 6, characterised in that, The sealing layer is arranged in the avoiding groove, the sealing layer is provided with a first threading hole and a second threading hole, and the first joint and the second joint are arranged in the first threading hole and the second threading hole respectively.

8. An armoured submarine cable according to claim 7, characterised in that, The length of the avoiding groove is 100-600mm, the length of the sealing layer is 100-300mm longer than that of the avoiding groove, and the outer diameter of the sealing layer is 1.2-1.5 times the outer diameter of the inner protective layer.

9. A method of manufacturing an armoured submarine cable, characterised in that, The main cable is provided, and the outer circumferential side of the main cable is provided with a plurality of armored steel wires; At least one branch cable is provided, and the branch cable is connected with the main cable; A sealing layer is prepared at the connection between the main cable and the branch cable; ​ Providing at least one armored clamp, the armored clamp is provided with a through hole, a plurality of grooves and a plurality of protrusions, a plurality of the protrusions are parallel to each other, a plurality of the protrusions are arranged along the axial direction of the main cable, the through hole is arranged in the protrusion, the groove is formed between the two adjacent protrusions, and the grooving direction of the groove is the same as the stranding direction of the armored steel wire; The armored clamp is sleeved outside the main cable, the branch cable passes through the through hole, the armored steel wire is continuously and uniformly stranded on the outer circumferential side of the main cable, and is uniformly stranded and distributed in the groove.

10. The method of manufacturing an armoured submarine cable according to claim 9, wherein, The at least one branch cable is provided, and the branch cable is connected with the main cable, including: The main cable is ring cut to form an avoidance groove, the avoidance groove passes through the wrapping layer and the inner protective layer to expose a plurality of power lines and a plurality of twisted pairs; At least one of the power lines or at least one of the twisted pairs is cut off to form a first joint and a second joint, and the first joint and the second joint are pulled out of the avoidance groove to form the branch cable.

11. The method of manufacturing an armoured submarine cable according to claim 10, wherein, The sealing layer is prepared at the connection between the main cable and the branch cable, including: The avoidance groove on the main cable is put into a vulcanization mold, the vulcanization mold is provided with a first threading hole and a second threading hole, the first joint and the second joint are respectively threaded out of the first threading hole and the second threading hole; The sealing material is poured from the glue pouring port of the vulcanization mold for vulcanization; The vulcanization mold is removed to form the sealing layer at the connection between the main cable and the branch cable.

12. The method of manufacturing an armoured submarine cable according to claim 11, characterised in that, The at least one armored clamp is provided, the armored clamp is provided with a through hole, a plurality of grooves and a plurality of protrusions, a plurality of the protrusions are parallel to each other, a plurality of the protrusions are arranged along the axial direction of the main cable, the through hole is arranged in the protrusion, the groove is formed between the two adjacent protrusions, and the grooving direction of the groove is the same as the stranding direction of the armored steel wire; The armored clamp is sleeved outside the main cable, the branch cable passes through the through hole, the armored steel wire is continuously and uniformly stranded on the outer circumferential side of the main cable, and is uniformly stranded and distributed in the groove, including: The first part and the second part of the armored clamp are respectively attached to the outside of the sealing layer from both sides of the main cable; The branch cable is pulled out of the through hole, and the armored clamp is clamped and fixed with the sealing layer by using a fastener; A plurality of the armored steel wires are stranded on the outer circumferential side of the main cable, and when the steel wire stranding production reaches the armored clamp, a plurality of the armored steel wires are continuously and uniformly stranded in the groove, and after the groove is fully stranded, the steel wires in the groove are continuously armored until the entire length of the main cable is completely covered, and a metal clasp is used to fix and tighten the steel wires in the groove.

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