Submarine cable pulling head, submarine cable assembly and installation method of submarine cable pulling head

Abstract

The present invention provides a submarine cable towing head, a submarine cable assembly, and an installation method for the submarine cable towing head. The submarine cable towing head includes a housing for being mounted on a submarine cable; the housing has a first cavity and a second cavity that are connected. The first cavity is for the armor of the submarine cable and part of the conductor of the submarine cable, and the first cavity is filled with a first adhesive, through which the armor of the submarine cable is fixedly connected to the housing; the second cavity is for accommodating the other part of the conductor of the submarine cable, and the second cavity is filled with a second adhesive, through which the conductor of the submarine cable located in the second cavity is fixed to the housing. The submarine cable towing head provided by the present invention can ensure the performance and lifespan of the submarine cable.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cables, and in particular to a submarine cable pulling head, a submarine cable assembly and an installation method of the submarine cable pulling head. Background Art

[0002] During submarine cable installation, a towing head is installed at one end. This head guides the cable, withstands the tension of the towing cable, and prevents water from entering the cable core. It is an important technical means to ensure the safe laying of submarine cables.

[0003] In the prior art, after partially stripping off the sheath of the submarine cable, the submarine cable pulling head is placed over the exposed armor and part of the sheath of the submarine cable. Then, resin glue is poured into the gap between the submarine cable pulling head and the armor to connect and tighten the armor and the submarine cable pulling head.

[0004] However, this type of submarine cable towing head is likely to affect the performance and life of the submarine cable. Summary of the Invention

[0005] The present invention provides a submarine cable pulling head, a submarine cable assembly and an installation method of the submarine cable pulling head, so as to solve the technical problem that the submarine cable pulling head easily affects the performance and life of the submarine cable.

[0006] In a first aspect, the present invention provides a submarine cable pulling head, comprising a housing, the housing being adapted to be sleeved on a submarine cable;

[0007] The housing has a first cavity and a second cavity that are connected to each other. The first cavity is used to accommodate the armor of the submarine cable and part of the conductor of the submarine cable. The first cavity is filled with a first adhesive. The armor of the submarine cable is fixedly connected to the housing through the first adhesive.

[0008] The second cavity is used to accommodate another part of the conductor of the submarine cable. The second cavity is filled with a second adhesive. The conductor of the submarine cable in the second cavity is fixed to the shell through the second adhesive.

[0009] In one possible implementation, the submarine cable towing head provided by the present invention comprises a housing comprising an upper housing, a lower housing, and a pressure ring, wherein the upper housing and the lower housing are arranged opposite to each other, the pressure ring is located between the upper housing and the lower housing, the inner wall of the lower housing and the side of the pressure ring facing the lower housing form a first cavity, and the inner wall of the upper housing and the side of the pressure ring facing the upper housing form a second cavity;

[0010] The pressure ring is provided with at least one mounting joint communicating with the first cavity and the second cavity.

[0011] In a possible implementation, the submarine cable pulling head provided by the present invention further includes a first sealing ring and an end cover, wherein the inner wall of the first sealing ring abuts against the submarine cable, and the outer wall of the first sealing ring abuts against the lower shell;

[0012] The end cover is pressed onto a side of the lower shell facing away from the upper shell, the lower shell and the first sealing ring are both in contact with the end cover, and the end cover is connected to the lower shell.

[0013] In one possible implementation, the submarine cable towing head provided by the present invention further includes at least two second sealing rings, at least one of which is located between the lower shell and the pressure ring, the outer wall of the second sealing ring abutting against the lower shell, and the inner wall of the second sealing ring abutting against the pressure ring;

[0014] At least one second sealing ring is located between the upper shell and the pressure ring, the outer wall of the second sealing ring abuts against the upper shell, and the inner wall of the second sealing ring abuts against the pressure ring.

[0015] In a possible implementation, the submarine cable towing head provided by the present invention has at least one first perfusion hole provided on the side wall of the lower shell, and the first perfusion hole is connected to the first cavity;

[0016] One end of the upper shell facing away from the lower shell is provided with at least one second perfusion hole, and the second perfusion hole is communicated with the second cavity.

[0017] In a possible implementation, the submarine cable towing head provided by the present invention further includes a gland and at least one plug, the plug being arranged corresponding to the first pouring hole and inserted into the first pouring hole;

[0018] The pressure cover is located at one end of the upper shell body away from the lower shell body, is connected to the upper shell body, and is used for closing the second filling hole.

[0019] In a possible implementation, the submarine cable towing head provided by the present invention further includes a third sealing ring, which is located between the gland and the upper shell, with one end of the third sealing ring abutting against the gland and the other end abutting against the upper shell.

[0020] In one possible implementation, the submarine cable towing head provided by the present invention also includes an upper end cover and a detwist rod. The upper end cover is sleeved on the pressure cover, the upper end cover is connected to the upper shell, the detwist rod is inserted into the upper end cover, the detwist rod is rotatably connected to the upper end cover, and the detwist rod rotates relative to the upper end cover around the axis of the upper end cover.

[0021] In a second aspect, the present invention provides a method for installing a submarine cable towing head, comprising:

[0022] Processing the traction end of the submarine cable to expose the armor of the submarine cable and a portion of the conductor near the traction end of the submarine cable;

[0023] The shell of the submarine cable pulling head is placed on the pulling end of the submarine cable, wherein the armor and part of the conductor are located in the first cavity of the shell, and the other part of the conductor is located in the second cavity of the shell;

[0024] Applying preload to the conductor;

[0025] The first adhesive is poured into the first cavity, and the second adhesive is poured into the second cavity, wherein the armor of the submarine cable is fixedly connected to the shell through the first adhesive, and the conductor of the submarine cable located in the second cavity is fixed to the shell through the second adhesive.

[0026] In one possible implementation, the method for installing a submarine cable towing head provided by the present invention, wherein applying a pre-tightening force to a conductor includes:

[0027] Connect one end of the screw rod to the end of the housing facing away from the submarine cable, wherein the extension direction of the screw rod is consistent with the extension direction of the housing;

[0028] The adjusting member and the lifting plate are sequentially sleeved on the screw rod, wherein the end of the adjusting member facing away from the housing abuts against the lifting plate;

[0029] Loosely connect the clamping plate and the lifting plate, place the conductor between the clamping plate and the lifting plate, and tighten the clamping plate and the lifting plate to clamp the conductor;

[0030] The driving adjusting member moves away from the housing along the extending direction of the screw rod, so as to drive the pulling plate to move away from the housing along the extending direction of the screw rod.

[0031] In a third aspect, the present invention provides a submarine cable assembly, comprising a submarine cable and the submarine cable pulling head provided by the first aspect above, connected to the submarine cable.

[0032] The present invention provides a submarine cable pulling head, a submarine cable assembly, and an installation method for a submarine cable pulling head. The submarine cable pulling head is provided with a shell, and the shell is used to be sleeved on the submarine cable. The shell has a first cavity and a second cavity that are connected. The first cavity is used for the armor of the submarine cable and part of the conductor of the submarine cable. The first cavity is filled with a first adhesive. The armor of the submarine cable is fixedly connected to the shell through the first adhesive. The second cavity is used to accommodate the other part of the conductor of the submarine cable. The second cavity is filled with a second adhesive. The conductor of the submarine cable located in the second cavity is fixed to the shell through the second adhesive. In this way, the submarine cable pulling head is bonded to the armor and conductor of the submarine cable at the same time, which is conducive to effectively distributing the axial force generated during the pulling process to the metal units of each layer of the submarine cable, effectively avoiding sheath slippage and photoelectric connection problems, and can ensure the performance and life of the submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic structural diagram of a submarine cable pulling head provided in an embodiment of the present invention;

[0035] Figure 2 An exploded view of a submarine cable pulling head provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the internal structure of a submarine cable towing head provided in an embodiment of the present invention;

[0037] Figure 4 A flow chart of a method for installing a submarine cable towing head provided in an embodiment of the present invention;

[0038] Figure 5 A front view of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention;

[0039] Figure 6 A side view of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention;

[0040] Figure 7 An exploded view of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of the internal structure of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 100-housing;

[0044] 110 - first cavity; 120 - second cavity; 130 - upper shell; 131 - second filling hole; 140 - lower shell; 141 - first filling hole; 150 - pressure ring; 151 - mounting joint;

[0045] 200-first sealing ring;

[0046] 300-end cover;

[0047] 400-second sealing ring;

[0048] 500- gland;

[0049] 600-plug;

[0050] 700-third sealing ring;

[0051] 800-upper end cover;

[0052] 900-torsion bar;

[0053] 1000-submarine cable;

[0054] 1010-sheath; 1020-armor; 1030-conductor;

[0055] 1100-preload assembly;

[0056] 1110-splint; 1120-lifting plate; 1130-adjusting piece; 1140-screw; 1150-connecting nut. DETAILED DESCRIPTION

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] The terms "first," "second," and "third" (if any) in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can, for example, be implemented in sequences other than those illustrated or described herein.

[0060] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or service tool that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or service tool.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0062] In the prior art, after a portion of the submarine cable's sheath is stripped off, the submarine cable pulling head is placed over the exposed armor and part of the sheath of the submarine cable. Resin glue is then poured into the gap between the submarine cable pulling head and the armor to securely connect the armor to the submarine cable pulling head. Since the submarine cable pulling head is only bonded to the armor of the submarine cable, the axial tension applied to the submarine cable pulling head is difficult to effectively distribute to the various layers of metal units in the submarine cable, and the various layers of metal units are prone to dislocation and displacement. For example, the sheath slips and falls off the submarine cable pulling head, resulting in poor sealing of the submarine cable, and liquid enters the submarine cable, affecting the performance and life of the submarine cable. Alternatively, the conductor used for on-site optoelectronic unit connection slips a certain distance, resulting in insufficient reserved conductor length, which in turn causes optoelectronic connection problems.

[0063] To address the aforementioned technical issues, the present invention provides a submarine cable towing head, a submarine cable assembly, and a method for installing the submarine cable towing head. The submarine cable towing head comprises a housing having a first cavity and a second cavity connected thereto. The first cavity is filled with a first adhesive, and the armor of the submarine cable is fixedly connected to the housing via the first adhesive. The second cavity is filled with a second adhesive, and the conductor of the submarine cable located in the second cavity is fixed to the housing via the second adhesive. In this way, the submarine cable towing head is simultaneously bonded to the armor and conductor of the submarine cable, which helps effectively distribute the axial force generated during the pulling process to the various metal units of the submarine cable, effectively avoiding possible sheath slippage during the pulling process and photoelectric connection problems during suspended installation and anchoring.

[0064] Figure 1 A schematic structural diagram of a submarine cable pulling head provided in an embodiment of the present invention. Figure 2 An exploded view of a submarine cable pulling head provided in an embodiment of the present invention, Figure 3 A schematic diagram of the internal structure of a submarine cable traction head provided in an embodiment of the present invention.

[0065] See also Figures 1 to 3 As shown, the submarine cable pulling head provided by the present invention includes a shell 100, and the shell 100 is used to be sleeved on the submarine cable.

[0066] The shell 100 has a first cavity 110 and a second cavity 120 that are connected. The first cavity 110 is used to accommodate the armor 1020 of the submarine cable 1000 and part of the conductor 1030 of the submarine cable 1000. The first cavity 110 is filled with a first adhesive (not shown in the figure), and the armor 1020 of the submarine cable 1000 is fixedly connected to the shell 100 through the first adhesive.

[0067] The second cavity 120 is used to accommodate another part of the conductor 1030 of the submarine cable 1000. The second cavity 120 is filled with a second adhesive (not shown in the figure). The conductor 1030 of the submarine cable 1000 located in the second cavity 120 is fixed to the housing 100 through the second adhesive.

[0068] It should be noted that during installation, the trailing end of the submarine cable 1000 needs to be processed by partially stripping the jacket 1010 and armor 1020 of the submarine cable 1000, exposing the armor 1020 of the submarine cable 1000 and a portion of the conductor 1030 near the trailing end of the submarine cable 1000. When the housing 100 is mounted on the submarine cable 1000, the armor 1020 stripped of the jacket 1010 is located within the first cavity 110. A portion of the conductor 1030 stripped of the jacket 1010 and armor 1020 is located within the first cavity 110, while the remaining portion extends through the first cavity 110 into the second cavity 120. To ensure the sealing of the submarine cable 1000, the first cavity 110 can accommodate a portion of the jacket 1010 of the submarine cable 1000, or the end of the housing facing away from the conductor 1030 of the submarine cable 1000 can be mounted over the jacket 1010 of the submarine cable 1000.

[0069] Specifically, the first adhesive member and the second adhesive member may both be resin glue.

[0070] It can be understood that the submarine cable towing head is bonded to the armor 1020 and the conductor 1030 of the submarine cable 1000 at the same time. Under the same load-bearing capacity as the submarine cable towing head in the prior art, the submarine cable towing head provided in this embodiment is smaller in size, which can reduce the cost of raw materials and processing. At the same time, as the volume is reduced, the appearance size of the submarine cable towing head is more flexible and can adapt to more occasions.

[0071] The submarine cable pulling head provided in this embodiment is provided with a housing 100, which is configured to be mounted on a submarine cable 1000. The housing 100 has a first cavity 110 and a second cavity 120 that communicate with each other. The first cavity 110 is configured to accommodate the armor 1020 of the submarine cable 1000 and a portion of the conductor 1030 of the submarine cable 1000. The first cavity 110 is filled with a first adhesive, and the armor 1020 of the submarine cable 1000 is fixedly connected to the housing 100 via the first adhesive. The second cavity 120 is configured to accommodate the other portion of the conductor 1030 of the submarine cable 1000. The second cavity 120 is filled with a second adhesive, and the conductor 1030 of the submarine cable 1000 located in the second cavity 120 is fixed to the housing 100 via the second adhesive. In this way, the submarine cable pulling head is bonded to the armor 1020 and the conductor 1030 of the submarine cable 1000 at the same time, which is conducive to effectively distributing the axial force generated during the pulling process to the metal units of each layer of the submarine cable 1000, effectively avoiding the slippage of the sheath 1010 and the photoelectric connection problems, and ensuring the performance and life of the submarine cable 1000.

[0072] In one possible implementation, the shell 100 includes an upper shell 130, a lower shell 140 and a pressure ring 150. The upper shell 130 and the lower shell 140 are arranged opposite to each other, and the pressure ring 150 is located between the upper shell 130 and the lower shell 140. The inner wall of the lower shell 140 and the pressure ring 150 on the side opposite to the lower shell 140 form a first cavity 110, and the inner wall of the upper shell 130 and the pressure ring 150 on the side opposite to the upper shell 130 form a second cavity 120.

[0073] The pressure ring 150 has at least one mounting joint 151 communicating with the first cavity 110 and the second cavity 120 .

[0074] It can be understood that the housing 100 is provided in a split manner, which facilitates the installation and disassembly of the submarine cable traction head and the submarine cable 1000 and facilitates the maintenance of the submarine cable traction head.

[0075] The number of the installation joints 151 is the same as the number of the conductors 1030 in the submarine cable 1000, and the installation joints 151 are arranged one-to-one with the conductors 1030. In this way, the conductors 1030 can be separated to prevent the conductors 1030 from being entangled with each other.

[0076] Specifically, a plurality of first through holes are provided on the upper shell 130, a plurality of second through holes are provided on the pressure ring 150, and the first through holes and the second through holes are provided in one-to-one correspondence, and a plurality of threaded holes are provided on the lower shell 140, and the threaded holes and the second through holes are provided in one-to-one correspondence, and the screws pass through the first through holes and the second through holes in turn and then screwed into the threaded holes, thereby connecting the upper shell 130, the pressure ring 150 and the lower shell 140 into one.

[0077] To ensure the sealing of the submarine cable towing head, the submarine cable towing head further includes a first sealing ring 200 and an end cap 300. The inner wall of the first sealing ring 200 abuts against the submarine cable 1000, and the outer wall of the first sealing ring 200 abuts against the lower housing 140. This prevents liquid from entering the submarine cable towing head through the gap between the lower housing 140 and the jacket 1010 of the submarine cable 1000.

[0078] The end cap 300 is crimped onto the side of the lower housing 140 facing away from the upper housing 130. The lower housing 140 and the first sealing ring 200 both abut against the end cap 300, and the end cap 300 is connected to the lower housing 140. The provision of the cover plate ensures a tight fit between the first sealing ring 200, the lower housing 140, and the sheath 1010 of the submarine cable 1000, thereby improving sealing performance.

[0079] For example, the end cover 300 and the lower housing 140 may be connected by screws.

[0080] In some embodiments, the submarine cable towing head further includes at least two second sealing rings 400, at least one of which is located between the lower housing 140 and the pressure ring 150, with the outer wall of the second sealing ring 400 abutting against the lower housing 140, and the inner wall of the second sealing ring 400 abutting against the pressure ring 150. In this way, liquid can be prevented from entering the first cavity 110 through the gap between the lower housing 140 and the pressure ring 150.

[0081] At least one second sealing ring 400 is located between the upper shell 130 and the pressure ring 150. The outer wall of the second sealing ring 400 abuts against the upper shell 130, and the inner wall of the second sealing ring 400 abuts against the pressure ring 150. In this way, liquid can be prevented from entering the second cavity 120 through the gap between the upper shell 130 and the pressure ring 150.

[0082] In this embodiment, at least one first pouring hole 141 is provided on the side wall of the lower housing 140, and the first pouring hole 141 is connected to the first cavity 110. In this way, the first adhesive can be poured into the first cavity 110 through the first pouring hole 141, which is convenient for operation.

[0083] The upper shell 130 has at least one second filling hole 131 at one end facing away from the lower shell 140, and the second filling hole 131 is connected to the second cavity 120. In this way, the second adhesive can be poured into the second cavity 120 through the first filling hole 141, which is convenient for operation.

[0084] Specifically, the number of the second filling hole 131 is one.

[0085] In one possible implementation, the submarine cable towing head further includes a gland 500 and at least one plug 600. The plug 600 is disposed corresponding to the first grouting hole 141 and inserted into the first grouting hole 141. In this way, the first grouting hole 141 can be sealed, thereby improving the sealing performance of the submarine cable towing head.

[0086] The gland 500 is located at one end of the upper shell 130 away from the lower shell 140. The gland 500 is connected to the upper shell 130 and is used to close the second pouring hole 131, thereby improving the sealing performance of the submarine cable pulling head.

[0087] To ensure the sealing of the submarine cable towing head, the submarine cable towing head further includes a third sealing ring 700, which is located between the gland 500 and the upper shell 130. One end of the third sealing ring 700 abuts against the gland 500, and the other end abuts against the upper shell 130. In this way, liquid can be prevented from entering the second cavity 120 through the gap between the upper shell 130 and the gland 500 and the second filling hole 131.

[0088] For example, the pressure cover 500 and the upper housing 130 may be connected by screws.

[0089] In some embodiments, the submarine cable pulling head further includes an upper end cover 800 and a detwisting rod 900. The upper end cover 800 is sleeved on the gland 500 and connected to the upper housing 130. The detwisting rod 900 is inserted into the upper end cover 800 and is rotatably connected to the upper end cover 800. The detwisting rod 900 rotates relative to the upper end cover 800 around the axis of the upper end cover 800. In this way, the submarine cable 1000 can be prevented from twisting during the pulling process.

[0090] The present invention further provides a submarine cable assembly, comprising a submarine cable 1000 and a submarine cable pulling head provided in the above embodiment and connected to the submarine cable 1000.

[0091] The submarine cable assembly provided in this embodiment is provided with a submarine cable 1000 and a submarine cable pulling head provided in the above embodiment. The submarine cable pulling head is bonded to the armor 1020 and the conductor 1030 of the submarine cable 1000 at the same time, which is beneficial for effectively distributing the axial force generated during the pulling process to the metal units of each layer of the submarine cable 1000, effectively avoiding the slippage of the sheath 1010 and the photoelectric connection problem, thereby ensuring the performance and life of the submarine cable assembly.

[0092] Figure 4 Flowchart of the installation method of the submarine cable pulling head provided by the embodiment of the present invention. Figure 4 As shown, the present invention provides a method for installing a submarine cable towing head, comprising:

[0093] S101 . Process the traction end of the submarine cable 1000 to expose the armor 1020 of the submarine cable 1000 and a portion of the conductor 1030 close to the traction end of the submarine cable 1000 .

[0094] S102 , sleeve the housing 100 of the submarine cable traction head onto the traction end of the submarine cable 1000 .

[0095] The sheath 1010 , the armor 1020 and a portion of the conductor 1030 are located in the first cavity 110 of the housing 100 , and another portion of the conductor 1030 is located in the second cavity 120 of the housing 100 .

[0096] S103: Apply a pre-tightening force to the conductor 1030. In this way, the conductor 1030 can be in a tensioned state.

[0097] Specifically, a pre-tightening force is applied to the conductor 1030 through the pre-tightening component 1100 .

[0098] S104 , pouring the first adhesive into the first cavity 110 , and pouring the second adhesive into the second cavity 120 .

[0099] The armor 1020 of the submarine cable 1000 is fixedly connected to the housing 100 via a first adhesive, and the conductor 1030 of the submarine cable 1000 located in the second cavity 120 is fixed to the housing 100 via a second adhesive.

[0100] The installation method of a submarine cable towing head provided in this embodiment involves processing the towing end of a submarine cable 1000 to expose the armor 1020 of the submarine cable 1000 and a portion of the conductor 1030 near the towing end of the submarine cable 1000. The housing 100 of the submarine cable towing head is placed over the towing end of the submarine cable 1000, with the armor 1020 and a portion of the conductor 1030 located within the first cavity 110 of the housing 100, and the remaining portion of the conductor 1030 located within the second cavity 120 of the housing 100. A preload force is applied to the conductor 1030. A first adhesive is poured into the first cavity 110, and a second adhesive is poured into the second cavity 120. The armor 1020 of the submarine cable 1000 is fixedly connected to the housing 100 via the first adhesive, while the conductor 1030 of the submarine cable 1000 located within the second cavity 120 is fixed to the housing 100 via the second adhesive. In this way, by applying a pre-tightening force to the conductor 1030, the submarine cable pulling head is bonded to the armor 1020 and the conductor 1030 of the submarine cable 1000 at the same time, thereby ensuring that the axial force generated during the pulling process is effectively distributed to the metal units of each layer of the submarine cable 1000, effectively avoiding the slippage of the sheath 1010 and the photoelectric connection problem.

[0101] Figure 5 This is a front view of a submarine cable pulling head and a pre-tensioning assembly provided by an embodiment of the present invention. Figure 6 A side view of a submarine cable pulling head and a pre-tensioning assembly provided by an embodiment of the present invention, Figure 7 An exploded view of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention. Figure 8 A schematic diagram of the internal structure of a submarine cable pulling head and a pre-tensioning assembly provided in an embodiment of the present invention.

[0102] See also Figures 5 to 8 As shown, the pre-tensioning assembly 1100 includes a clamping plate 1110, a lifting plate 1120, an adjusting member 1130, and at least one screw rod 1140. One end of the screw rod 1140 is connected to the upper housing 130. The extension direction of the screw rod 1140 is consistent with the extension direction of the housing 100. The lifting plate 1120 and the adjusting member 1130 are both mounted on the screw rod 1140. The clamping plate 1110 is connected to the lifting plate 1120. The lifting plate 1120 and the clamping plate 1110 are used to clamp the conductor 1030 of the submarine cable 1000.

[0103] The adjusting member 1130 is located on the side of the lifting plate 1120 facing the upper shell 130. The adjusting member 1130 can move away from the upper shell 130 along the extension direction of the screw rod 1140, driving the lifting plate 1120 to move away from the shell 100 along the extension direction of the screw rod 1140 to apply pre-tightening force to the conductor 1030 of the submarine cable 1000.

[0104] Specifically, there are two screw rods 1140 , and the two screw rods 1140 are arranged side by side.

[0105] The adjusting member 1130 may be an adjusting nut, and the number of the adjusting members 1130 may be two, with one adjusting nut being provided on each of the two screw rods 1140 .

[0106] In some embodiments, the splint 1110 is located on the side of the lifting plate 1120 facing the upper shell 130, and a center hole is provided on the splint 1110. The conductor 1030 is placed between the splint 1110 and the lifting plate 1120 through the second infusion hole 131 on the upper shell 130 and the center hole on the splint 1110 in sequence.

[0107] For example, the splint 1110 and the lifting plate 1120 may be connected by screws.

[0108] In this embodiment, screw rod 1140 is provided with external threads, and upper housing 130 is provided with threaded holes that match the external threads. Screw rod 1140 and upper housing 130 are connected via the external threads and threaded holes. To enhance the reliability of the connection between screw rod 1140 and upper housing 130, screw rod 1140 is provided with a connecting nut 1150. Connecting nut 1150 is sleeved on the side of screw rod 1140 that is closest to upper housing 130, and the side of connecting nut 1150 that faces away from lifting plate 1120 abuts against upper housing 130.

[0109] In a possible implementation, applying a preload force to the conductor 1030 includes:

[0110] One end of the screw rod 1140 is connected to the end of the housing 100 facing away from the submarine cable 1000 , wherein the extension direction of the screw rod 1140 is consistent with the extension direction of the housing 100 .

[0111] The adjusting member 1130 and the lifting plate 1120 are sequentially sleeved on the screw rod 1140 , wherein one end of the adjusting member 1130 facing away from the housing 100 abuts against the lifting plate 1120 .

[0112] The clamping plate 1110 and the lifting plate 1120 are loosely connected, the conductor 1030 is placed between the clamping plate 1110 and the lifting plate 1120 , and the clamping plate 1110 and the lifting plate 1120 are tightly connected to clamp the conductor 1030 .

[0113] The driving adjustment member 1130 moves away from the housing 100 along the extending direction of the screw rod 1140 , so as to drive the lifting plate 1120 to move away from the housing 100 along the extending direction of the screw rod 1140 .

[0114] It can be understood that applying the pre-tightening force to the conductor 1030 in the above manner is easy to operate and has high reliability.

[0115] In some embodiments, after the first adhesive and the second adhesive are solidified, the pre-tightening assembly 1100 is removed and the exposed conductor 1030 is cut off.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A submarine cable pulling head, characterized in that: It comprises a housing, wherein the housing is used to be sleeved on the submarine cable; The housing has a first cavity and a second cavity that are connected to each other. The first cavity is used to accommodate the armor of the submarine cable and part of the conductor of the submarine cable. The first cavity is filled with a first adhesive. The armor of the submarine cable is fixedly connected to the housing via the first adhesive. The second cavity is used to accommodate another part of the conductor of the submarine cable. The second cavity is filled with a second adhesive. The conductor of the submarine cable located in the second cavity is fixed to the housing through the second adhesive. The housing includes an upper housing, a lower housing, and a pressure ring. The upper housing and the lower housing are arranged opposite to each other. The pressure ring is located between the upper housing and the lower housing. The inner wall of the lower housing and the surface of the pressure ring facing the lower housing form the first cavity. The inner wall of the upper housing and the surface of the pressure ring facing the upper housing form the second cavity. The pressure ring has at least one mounting joint connecting the first cavity and the second cavity; At least one first filling hole is provided on the side wall of the lower shell, and the first filling hole is communicated with the first cavity; The upper shell has at least one second filling hole at one end facing away from the lower shell, and the second filling hole is communicated with the second cavity.

2. The submarine cable pulling head according to claim 1, characterized in that: It also includes a first sealing ring and an end cover, wherein the inner wall of the first sealing ring abuts against the submarine cable, and the outer wall of the first sealing ring abuts against the lower shell; The end cover is pressed against a side of the lower shell facing away from the upper shell, the lower shell and the first sealing ring are both in contact with the end cover, and the end cover is connected to the lower shell.

3. The submarine cable pulling head according to claim 1, characterized in that: It also includes at least two second sealing rings, at least one of which is located between the lower shell and the pressure ring, the outer wall of the second sealing ring abuts against the lower shell, and the inner wall of the second sealing ring abuts against the pressure ring; At least one second sealing ring is located between the upper shell and the pressure ring, the outer wall of the second sealing ring abuts against the upper shell, and the inner wall of the second sealing ring abuts against the pressure ring.

4. The submarine cable towing head according to any one of claims 1 to 3, characterized in that: It also includes a gland and at least one plug, wherein the plug is arranged corresponding to the first pouring hole and inserted into the first pouring hole; The pressure cover is located at one end of the upper shell away from the lower shell, the pressure cover is connected to the upper shell, and the pressure cover is used to close the second filling hole.

5. The submarine cable pulling head according to claim 4, characterized in that: It also includes a third sealing ring, which is located between the pressure cover and the upper shell. One end of the third sealing ring abuts against the pressure cover, and the other end abuts against the upper shell.

6. The submarine cable pulling head according to claim 4, characterized in that: It also includes an upper end cover and a detwist rod, wherein the upper end cover is sleeved on the pressure cover, the upper end cover is connected to the upper shell, the detwist rod is inserted into the upper end cover, the detwist rod is rotatably connected to the upper end cover, and the detwist rod rotates relative to the upper end cover around the axis of the upper end cover.

7. A method for installing a submarine cable towing head, for installing the submarine cable towing head according to any one of claims 1 to 6, characterized in that: include; processing the trailing end of the submarine cable to expose the armor of the submarine cable and a portion of the conductor near the trailing end of the submarine cable; Sleeve the shell of the submarine cable pulling head onto the pulling end of the submarine cable, wherein the armor and part of the conductor are located in the first cavity of the shell, and the other part of the conductor is located in the second cavity of the shell; applying a preload force to the conductor; A first adhesive is poured into the first cavity, and a second adhesive is poured into the second cavity, wherein the armor of the submarine cable is fixedly connected to the shell through the first adhesive, and the conductor of the submarine cable located in the second cavity is fixed to the shell through the second adhesive.

8. The method for installing a submarine cable towing head according to claim 7, characterized in that: Applying a preload force to the conductor comprises: Connecting one end of the screw rod to an end of the housing facing away from the submarine cable, wherein the extending direction of the screw rod is consistent with the extending direction of the housing; The adjusting member and the lifting plate are sequentially sleeved on the screw rod, wherein the end of the adjusting member facing away from the housing abuts against the lifting plate; Loosely connecting the clamping plate to the lifting plate, placing the conductor between the clamping plate and the lifting plate, and then fastening the clamping plate to the lifting plate to clamp the conductor; The adjusting member is driven to move away from the housing along the extending direction of the screw rod, so as to drive the lifting plate to move away from the housing along the extending direction of the screw rod.

9. A submarine cable assembly, characterized in that: The invention comprises a submarine cable and a submarine cable pulling head according to any one of claims 1 to 6 connected to the submarine cable.

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