Optical cable tensile joint device
By combining inner cone clamping with U-shaped glue injection, the optical cable steel wire is double-fixed, which solves the problem of insufficient tensile strength of optical cable joint devices in deep-sea environments and improves the mechanical stability and sealing of optical cables under high loads.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING SHENZHOU PUHUI TECH
- Filing Date
- 2026-03-12
- Publication Date
- 2026-07-07
AI Technical Summary
Existing shallow-sea optical cable splicing devices cannot effectively distribute and transmit high tensile loads in deep-sea environments, resulting in mechanically weak points in the splice area of the optical cable, making it easy to pull off or break.
The optical cable steel wires are double-fixed by a combination of inner cone clamping and U-shaped part injection. The tensile strength of the optical cable is enhanced by the design of locking components and connectors. Combined with pre-twisted wires, crimping rings and threaded connections, a multi-level tensile strength system is formed.
It improves the tensile strength of the optical cable splice device, reduces the risk of optical cable breakage in deep-sea environments, and enhances mechanical stability and sealing performance under high loads.
Smart Images
Figure CN122345918A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of optical cable splice devices, and more particularly to an optical cable tensile splice device. Background Technology
[0002] Existing shallow-sea optical cable splice assemblies are typically used in waters no deeper than 500 meters, and their structural strength and tensile performance are designed based on this condition. However, in deep-sea environments above 8000 meters, the axial tensile force on the optical cable during laying, retrieval, and long-term service increases significantly. This is not only due to its own weight and laying tension but also affected by dynamic loads such as strong ocean currents, seabed topography, and seismic activity. In this context, the tensile performance of existing optical cable splice closures designed for shallow seas cannot meet the requirements of deep-sea conditions. They are unable to effectively transfer and distribute high tensile loads, easily creating mechanically weak points in the splice area, leading to the optical cable detaching from the splice closure or breaking. Summary of the Invention
[0003] This invention provides an optical cable tensile splice device to solve the defect of insufficient tensile strength of optical cable splices in the prior art and improve the tensile strength of optical cable splices.
[0004] This invention provides an optical cable tensile splice device, comprising a splice assembly and a splice box, wherein two splice assemblies are connected to the splice box, and each splice assembly includes: The tube has an internal cavity, through which the optical cable is inserted. A locking assembly is disposed within the cavity and sleeved on the optical cable. One end of the locking assembly is fixedly connected to the outer sheath. The locking assembly has a first conical cavity and includes an inner cone. After the outer sheath is stripped, the optical cable extends into the first conical cavity. The inner cone is used to press the steel wires of the steel wire layer onto the surface of the first conical cavity. The connector includes a connector portion located outside the tube body and a tail portion extending into the cavity. The tail portion is fixedly connected to the locking assembly. The connector has a potting cavity communicating with the first conical cavity. One end of the steel wire is bent to form a U-shape, which is located inside the glue-filling cavity and fixed by glue.
[0005] In some embodiments, the connector assembly includes: The pre-twisted wire is placed in the cavity and sleeved on the optical cable, with one end fixedly connected to the outer sheath and the other end fixedly connected to the locking assembly.
[0006] In some embodiments, the connector assembly includes: A clamping ring is provided, with the other end of the pre-twisted wire sleeved on the locking assembly. The clamping ring is sleeved on the overlapping part of the pre-twisted wire and the locking assembly to fix the pre-twisted wire to the locking assembly.
[0007] In some embodiments, the tail portion is sleeved on the outer periphery of the locking component and threadedly connected to the locking component; Both the locking assembly and the tail are provided with a first hole, and a first fastener passes through the first hole to fix the locking assembly and the tail.
[0008] In some embodiments, the connector box includes a mounting cylinder, and the connector portion is mounted inside the mounting cylinder; The connector is provided with an annular protrusion, and the mounting cylinder is provided with an annular groove that mates with the annular protrusion. The annular protrusion and the annular groove are respectively provided with a second hole, and a second fastener passes through the second hole to fix the connector to the mounting cylinder.
[0009] In some embodiments, the locking assembly includes an outer tube, an inner tube, and an injection-molded rubber sheet. One end of the outer tube is connected to the pre-twisted wire, and the outer tube is sleeved on the inner tube. The inner tube comprises, in sequence: The outer periphery of the covering section has multiple protrusions; The body has the first conical cavity formed inside; The platform stage has an outer diameter larger than the outer diameter of the body. A transition cavity is formed within the platform stage, which is connected to both the glue-filling cavity and the first conical cavity. The platform stage abuts against the end face of the outer tube. The injection-molded rubber sheet is disposed between the outer tube and the inner tube, with one end of the injection-molded rubber sheet fixedly connected to the outer skin and the other end of the injection-molded rubber sheet fixedly connected to the covering section.
[0010] In some embodiments, the connector includes: A sealing cavity, the opening of which is located on the end face of the connector; A partition is used to separate the sealing cavity from the potting cavity, and it is provided with a through hole. The cable core passes through the first conical cavity, the potting cavity, the through hole, and the sealing cavity and extends to the outside of the connector. The optical cable tensile joint device includes a first sealing component, which is disposed in the sealing cavity to seal the glue-filling cavity.
[0011] In some embodiments, the first sealing assembly includes: A sealing sleeve is disposed inside the sealing cavity, the inner circumferential surface of the sealing sleeve is in contact with the cable core, and the outer circumferential surface of the sealing sleeve is in contact with the inner circumferential surface of the sealing cavity; A first sealing component is disposed on the inner peripheral wall of the sealing sleeve to seal the gap between the sealing sleeve and the cable core; and / or, is disposed on the outer peripheral wall of the sealing sleeve to seal the gap between the sealing sleeve and the sealing cavity; A plug is fitted onto the cable core and installed in the opening.
[0012] In some embodiments, the connector assembly includes a second sealing assembly, the second sealing assembly comprising: Multiple second sealing rings are spaced apart on the outer periphery of the joint portion, and the mounting cylinder includes a cylindrical section. The joint portion and the cylindrical section are sealed together by the second sealing assembly.
[0013] In some embodiments, the tube body includes: A protective section is fitted onto the tail section, and a third hole is provided on both the protective section and the tail section. A third fastener passes through the third hole to fix the protective section and the tail section. The bending-limiting section includes multiple bending-limiting rings connected in sequence, and two adjacent bending-limiting rings can rotate relative to each other; The guide section is fixedly connected to one end of the bending-limiting section; The protective section, the bending limit section, and the guide section are connected in sequence.
[0014] The optical cable tensile joint device of this invention achieves double fixation of the optical cable steel wire by combining inner cone clamping and U-shaped part glue injection, thereby improving the tensile strength of the optical cable tensile joint device. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a cross-sectional structural schematic diagram of the optical cable tensile joint device provided by the present invention.
[0017] Figure 2 This is a schematic diagram of the optical cable tensile joint device provided by the present invention.
[0018] Figure 3 This is a schematic diagram of the locking assembly of the optical cable tensile joint device provided by the present invention.
[0019] Figure 4 This is a schematic diagram of the structure of the first sealing component and the second sealing component of the optical cable tensile joint device provided by the present invention.
[0020] Figure 5 This is a schematic diagram of the structure of the third sealing component of the optical cable tensile joint device provided by the present invention.
[0021] Figure 6 This is a schematic diagram of the structure of the fourth sealing component of the optical cable tensile joint device provided by the present invention.
[0022] Figure 7 This is a schematic diagram of the glue-filling cavity of the optical cable tensile joint device provided by the present invention.
[0023] Figure 8 This is a schematic diagram of the optical cable structure of the optical cable tensile joint device provided by the present invention.
[0024] Figure 9 This is a schematic diagram of the joint box that works in conjunction with the optical cable tensile joint device provided by the present invention.
[0025] Figure 10 This is a cross-sectional structural diagram of a connector box that works in conjunction with the optical cable tensile joint device provided by this invention.
[0026] Figure label: 100. Optical cable tensile splice device; 1. Pipe body; 11. Cavity; 12. Protective section; 13. Bending-limiting section; 131. Bending-limiting ring; 14. Guide section; 2. Locking assembly; 21. First conical cavity; 22. Inner cone; 23. Outer tube; 24. Inner tube; 241. Covering section; 242. Body; 243. Stage; 2431. Transition cavity; 3. Connector; 31. Connector section; 311. Ring protrusion; 312. Recessed area; 32. Tail end; 33. Sealing cavity; 34. Glue filling cavity; 35. Partition; 4. First sealing assembly; 41. Sealing sleeve; 42. First sealing component; 421. First sealing ring; 422. First sealing gasket; 43. Plug; 5. Second sealing assembly; 51. Second sealing ring; 6. Third sealing assembly; 61. Third sealing element; 611. Conical portion; 612. Protrusion; 63. Rubber shell; 631. Abutment portion; 7. Fourth sealing assembly; 71. Nut; 72. Sealing cone; 721. First inclined surface; 73. Sealing cylinder; 8. Injection-molded rubber sheet; 9. Pre-twisted wire; 10. Crimping ring; 15. First fastener; 16. End cap; 17. Fifth seal; 200. Optical cable; 201. Cable core; 202. Steel wire layer; 2021. Steel wire; 2022. U-shaped section; 203. Outer sheath; 2031. Outer sheath layer; 2032. Sheath layer; 300. Junction box; 301. Mounting cylinder; 302. Annular groove; 303. Cylindrical section; 304. Open section; 3041. Second conical cavity. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0028] The following is based on Figures 1 to 10 The optical cable tensile joint device 100 according to an embodiment of the present invention is described.
[0029] like Figure 1 As shown, the optical cable tensile splice device 100 of this embodiment includes a splice assembly and a splice box 300. Two splice assemblies are connected to the splice box 300. The splice assembly includes a tube body 1, a locking assembly 2, and a splice piece 3.
[0030] The tube 1 has a cavity 11 inside, and the optical cable 200 is inserted through the cavity 11.
[0031] The locking component 2 is disposed in the cavity 11 and sleeved on the optical cable 200. One end of the locking component 2 is fixedly connected to the outer sheath 203. The locking component 2 is provided with a first conical cavity 21. The locking component 2 includes an inner cone 22. After the outer sheath 203 is peeled off, the optical cable 200 extends into the first conical cavity 21. The inner cone 22 is used to press the steel wires 2021 of the steel wire layer 202 onto the surface of the first conical cavity 21.
[0032] The connector 3 includes a connector portion 31 located outside the tube body 1 and a tail portion 32 extending into the cavity 11. The tail portion 32 is fixedly connected to the locking assembly 2. The connector 3 has a potting cavity 34 communicating with the first conical cavity 21.
[0033] One end of the steel wire 2021 is bent to form a U-shaped part 2022, which is located in the glue-filling cavity 34 and is fixed by glue.
[0034] For ease of description, the technical solution of this application will be described below with the left-right direction as the axial direction of the pipe body 1, wherein the left-right direction is as follows: Figure 1 As shown.
[0035] The optical cable 200 includes a cable core 201, a steel wire layer 202, and an outer sheath 203 arranged sequentially from the inside to the outside.
[0036] The tube body 1 has a cavity 11 inside, and the optical cable 200 passes through the cavity 11. The locking component 2 is disposed in the cavity 11 and is sleeved on the outer periphery of the optical cable 200 to mechanically fix the optical cable 200 and prevent it from shifting during use.
[0037] The connector 3 is located on the right side of the locking assembly 2. The connector 3 includes a connector portion 31 and a tail portion 32. The tail portion 32 is located to the left of the connector portion 31 and is fixedly connected to the locking assembly 2 and the tube body 1, forming a stable structural support. The connector portion 31 is used to mate with the connector box 300 for installation. The connector assembly is located at the end of the optical cable 200, and two connector assemblies are connected through the connector box 300 to enable communication connection between the two optical cables 200.
[0038] After the outer sheath 203 is stripped, the steel wire 2021 of the optical cable 200 enters the first conical cavity 21 of the locking assembly 2. During assembly, the inner cone 22 applies radial pressure to the steel wire 2021, pressing it tightly against the inner wall of the first conical cavity 21 to achieve mechanical anchoring.
[0039] The steel wire layer 202 has multiple steel wires 2021. The end of each steel wire 2021 is bent into a U-shaped part 2022 and extends into the glue-filling cavity 34 of the connector 3. After the glue is injected, the U-shaped part 2022 is wrapped and fixed by the glue, forming a secondary anchor.
[0040] The optical cable tensile splice device 100 of this invention achieves double fixation of the steel wire 2021 of the optical cable 200 by combining the inner cone 22 pressing and the U-shaped part 2022 potting, thereby improving the tensile strength of the optical cable tensile splice device 100.
[0041] In other embodiments, the head of the steel wire 2021 is gathered around the outer periphery of the cable core 201 and extends toward the location of the inner cone 22.
[0042] In this embodiment, the head of the steel wire 2021 is bent and extends to the left and wraps around the outer periphery of the cable core 201, and the head of the steel wire 2021 extends into the transition cavity 2431.
[0043] The optical cable tensile splice device 100 of this invention increases the bending deformation of the steel wire 2021 by bending the head of the steel wire 2021 and extending it around the cable core 201 to the vicinity of the inner cone 22, thereby increasing the contact area between the steel wire 2021 and the adhesive, strengthening the fixing effect of the steel wire 2021 in the glue filling cavity 34, and helping to improve the tensile bearing capacity of the optical cable tensile splice device 100.
[0044] In some embodiments, the connector assembly includes a pre-twisted wire 9, which is disposed in the cavity 11 and sleeved on the optical cable 200. One end of the pre-twisted wire 9 is fixedly connected to the outer sheath 203, and the other end is fixedly connected to the locking assembly 2.
[0045] In this embodiment, the pre-twisted wire 9 is a spiral metal wire structure, sleeved on the outside of the outer sheath 203 of the optical cable 200. One end of the pre-twisted wire 9 is fixedly connected to the outer sheath 203 of the optical cable 200 by a binding strap. The other end of the pre-twisted wire 9 is fixedly connected to the locking assembly 2, so that the tension on the outer sheath 203 can be transmitted to the optical cable tensile splice device 100 through the pre-twisted wire 9 and the locking assembly 2.
[0046] The optical cable tensile joint device 100 of this invention connects the outer sheath 203 of the optical cable 200 and the locking component 2 through pre-twisted wire 9, which shares the tensile stress borne by the outer sheath 203, helps to reduce the axial deformation of the outer sheath 203 under continuous load, and prevents the outer sheath 203 from shrinking back.
[0047] In some embodiments, such as Figure 1 As shown, the connector assembly includes a clamping ring 10, and the other end of the pre-twisted wire 9 is sleeved on the locking assembly 2. The clamping ring 10 is sleeved on the overlapping part of the pre-twisted wire 9 and the locking assembly 2 so as to fix the pre-twisted wire 9 and the locking assembly 2.
[0048] In this embodiment, the end of the pre-twisted wire 9 is wound around the outer periphery of the locking assembly 2 to form an overlapping section. The clamping ring 10 is sleeved on the outside of the overlapping section and undergoes plastic deformation through a pressing process to tightly cover the connection area between the pre-twisted wire 9 and the locking assembly 2, thereby achieving mechanical locking.
[0049] The optical cable tensile splice device 100 of this invention uses a clamping ring 10 to locally press the connection between the pre-twisted wire 9 and the locking assembly 2, thereby enhancing the connection strength between the two and preventing the pre-twisted wire 9 from loosening under vibration or tension conditions.
[0050] In some embodiments, such as Figure 1 As shown, the tail portion 32 is sleeved on the outer periphery of the locking component 2 and threadedly connected to the locking component 2.
[0051] Both the locking assembly 2 and the tail 32 are provided with a first hole, and the first fastener 15 passes through the first hole to fix the locking assembly 2 and the tail 32.
[0052] In this embodiment, the tail 32 of the connector 3 is fitted over the locking assembly 2 and initially connected by threaded engagement. First holes are respectively opened in the locking assembly 2 and the tail 32. After assembly, the first fastener 15 (e.g., a set screw) is inserted into the aligned first holes to further restrict the relative rotation between the locking assembly 2 and the connector.
[0053] The optical cable tensile joint device 100 of this invention uses a threaded connection combined with the insertion and fixing of the first fastener 15 to form a dual fixing structure of axial pre-tightening and circumferential limiting between the tail 32 and the locking component 2. This restricts the relative rotation of the two when subjected to force, which helps to export the torque transmitted from the optical cable 200 through the joint 3 as a whole, reducing the accumulation of torque at the optical cable tensile joint device 100, thereby reducing the risk of the optical cable 200 breaking due to torsion.
[0054] In some embodiments, such as Figure 9 As shown, the junction box 300 includes a mounting cylinder 301, and the connector portion 31 is installed inside the mounting cylinder 301.
[0055] The connector 31 is provided with an annular protrusion 311, and the mounting cylinder 301 is provided with an annular groove 302 that mates with the annular protrusion 311. The annular protrusion 311 and the annular groove 302 are respectively provided with second holes. The second fastener passes through the second hole so as to fix the connector 31 and the mounting cylinder 301.
[0056] In this embodiment, the connector 31 is inserted into the mounting sleeve 301 of the connector box 300 to achieve axial positioning.
[0057] The annular protrusion 311 on the outer periphery of the connector 31 is embedded in the corresponding annular groove 302 on the inner wall of the mounting cylinder 301, forming a circumferential limiting structure. The second holes on the annular protrusion 311 and the annular groove 302 are aligned. After assembly, the second fastener (such as a screw or pin) is inserted into the second hole to achieve a rigid connection between the connector 31 and the mounting cylinder 301.
[0058] The optical cable tensile splice device 100 of this embodiment of the invention, through the cooperation of the annular protrusion 311 and the annular groove 302, combined with the insertion and fixing of the second fastener, forms a double fixing structure in the axial and circumferential directions between the splice portion 31 and the mounting cylinder 301, thereby restricting the relative rotation of the two when subjected to force. This helps to export the torque transmitted from the optical cable 200 through the optical cable tensile splice device 100 and the splice box 300 as a whole, reducing the accumulation of torque at the optical cable tensile splice device 100 and the splice box 300, thereby reducing the risk of the optical cable 200 breaking due to torsion.
[0059] In some embodiments, such as Figure 7 As shown, the locking assembly 2 includes an outer tube 23, an inner tube 24, and an injection-molded rubber sheet 8. One end of the outer tube 23 is connected to the pre-twisted wire 9. The outer tube 23 is sleeved on the inner tube 24. The inner tube 24 includes a covering section 241, a body 242, and a platform stage 243 arranged in sequence.
[0060] The outer periphery of the covering section 241 is provided with multiple protrusions.
[0061] The body 242 has a first conical cavity 21 inside.
[0062] The outer diameter of the stage 243 is larger than the outer diameter of the body 242. A transition cavity 2431 is formed inside the stage 243. The transition cavity 2431 is connected to the glue-filling cavity 34 and the first conical cavity 21. The stage 243 abuts against the end face of the outer tube 23.
[0063] The injection molding sheet 8 is located between the outer tube 23 and the inner tube 24. One end of the injection molding sheet 8 is fixedly connected to the outer skin 203, and the other end of the injection molding sheet 8 is fixedly connected to the covering section 241.
[0064] In this embodiment, the body 242 of the inner tube 24 is provided with a first conical cavity 21. When the inner cone 22 is assembled, it applies radial pressure to the steel wire 2021 and presses it tightly on the inner wall of the first conical cavity 21 to achieve mechanical anchoring.
[0065] The outer diameter of the stage 243 is relatively large, forming a stepped structure. Its internal transition cavity 2431 connects the first conical cavity 21 and the glue filling cavity 34, which facilitates the flow and filling of sealant.
[0066] The end face of the stage 243 abuts against the end of the outer tube 23, thereby achieving axial positioning of the inner tube 24.
[0067] The injection-molded rubber sheet 8 is located in the annular space between the outer tube 23 and the inner tube 24. One end of it is fixedly connected to the outer sheath 203 of the optical cable 200, and the other end is fixedly connected to the covering section 241, forming a continuous sealing transition layer to seal the left opening of the inner tube 24. Multiple protrusions on the outer periphery of the covering section 241 can enhance the mechanical interlocking force between it and the injection-molded rubber sheet 8.
[0068] It should be noted that the outer sheath 203 of the optical cable 200 includes a sheath layer 2032 and an outer sheath layer 2031 arranged from the inside out. The outer sheath layer 2031 has been peeled off before entering the inner tube 24. The injection-molded rubber 8 uses the same material as the sheath layer 2032 so that the injection-molded rubber 8 and the sheath layer 2032 are fused together.
[0069] In other embodiments, such as Figure 7 As shown, the optical cable tensile splice device 100 includes an end cap 16, which is detachably connected to the stage 243, and an adhesive filling cavity 34 is formed inside the end cap 16.
[0070] In this embodiment, the end cap 16 is installed on the right side of the stage 243, and the two are detachably connected by means of threads or snaps.
[0071] The end cap 16 has an internal space forming a potting cavity 34 to accommodate the injected sealant. During assembly, the end of the steel wire 2021 of the optical cable 200 is bent and inserted into the potting cavity 34, where sealant is then injected. After curing, the steel wire 2021 is re-anchored.
[0072] The optical cable tensile joint device 100 of this invention, by providing a detachable end cap 16, allows the steel wire 2021 to be bent at the end to form a U-shaped part 2022 and placed into the internal space of the end cap 16 during the assembly process. Then, the end cap 16 is installed to complete the glue pouring, thereby facilitating the forming and positioning of the U-shaped part 2022.
[0073] Optionally, the end cap 16 is provided with an injection port for injecting adhesive. The end cap 16 is also provided with a through hole for the cable core 201 to pass through.
[0074] In some embodiments, such as Figure 1 As shown, the connector 3 includes a sealing cavity 33 and a partition 35. The opening of the sealing cavity 33 is located on the end face of the connector 3. The partition 35 is used to separate the sealing cavity 33 from the potting cavity 34, and has a through hole. The cable core 201 extends to the outside of the connector 3 after passing through the first conical cavity 21, the potting cavity 34, the through hole, and the sealing cavity 33.
[0075] The optical cable tensile splice device 100 includes a first sealing component 4, which is disposed in the sealing cavity 33 to seal the glue filling cavity 34.
[0076] In this embodiment, the partition 35 is disposed inside the connector 3, isolating the potting cavity 34 from the sealing cavity 33. The cable core 201 passes sequentially through the first conical cavity 21, the potting cavity 34, the through hole on the partition 35, and the sealing cavity 33, finally exiting from the right end of the connector 3. The first sealing assembly 4 is installed inside the sealing cavity 33, located between the partition 35 and the end face, to block the water seepage path from the sealing cavity 33 to the potting cavity 34. The through hole on the partition 35 allows the cable core 201 to pass through.
[0077] The optical cable tensile joint device 100 of this invention separates the sealing cavity 33 and the glue-filling cavity 34 by means of a partition 35, and forms an independent sealing area in the sealing cavity 33 in conjunction with the first sealing component 4, thereby realizing graded isolation of the cable core 201 channel and improving the reliability of the sealing structure under high water pressure environment.
[0078] In some embodiments, such as Figure 1 and Figure 4 As shown, the first sealing assembly 4 includes a sealing sleeve 41, a first sealing component 42, and a plug 43.
[0079] The sealing sleeve 41 is located inside the sealing cavity 33. The inner circumferential surface of the sealing sleeve 41 is in contact with the cable core 201, and the outer circumferential surface of the sealing sleeve 41 is in contact with the inner circumferential surface of the sealing cavity 33.
[0080] The first sealing component 42 is disposed on the inner peripheral wall of the sealing sleeve 41 to seal the gap between the cable core 201 and the sealing sleeve 41.
[0081] And / or, provided on the outer peripheral wall of the sealing sleeve 41, so as to seal the gap between the sealing cavity 33 and the sealing sleeve 41.
[0082] The plug 43 is fitted onto the cable core 201 and installed in the opening.
[0083] In this embodiment, the sealing sleeve 41 is installed in the sealing cavity 33 of the connector 3. The inner circumferential surface of the sealing sleeve 41 contacts the outer surface of the cable core 201 passing through it, and the outer circumferential surface of the sealing sleeve 41 contacts the inner wall of the sealing cavity 33, forming an annular sealing base structure.
[0084] The first sealing component 42 is disposed between the sealing sleeve 41 and the cable core 201; or, the first sealing component 42 is disposed between the sealing sleeve 41 and the sealing cavity 33; or, the first sealing component 42 is disposed both between the sealing sleeve 41 and the cable core 201 and between the sealing sleeve 41 and the sealing cavity 33. The first sealing component 42 is used to fill the mating gap.
[0085] The plug 43 is installed at the end face opening of the sealing cavity 33, which serves to limit the position and assist in sealing the overall structure.
[0086] The optical cable tensile joint device 100 of this embodiment of the invention forms a double-sided contact sealing support structure by setting a sealing sleeve 41 that simultaneously fits with the cable core 201 and the sealing cavity 33, providing a stable installation base for the first sealing component 42 and helping to improve the sealing performance of the glue-filling cavity 34 area.
[0087] In other embodiments, such as Figure 4 As shown, the first sealing component 42 includes a first sealing ring 421.
[0088] Multiple first sealing rings 421 are disposed on the outer peripheral wall of the sealing sleeve 41 in order to seal the gap between the sealing sleeve 41 and the sealing cavity 33.
[0089] In this embodiment, the first sealing component 42 employs multiple first sealing rings 421 arranged on the outer peripheral wall of the sealing sleeve 41. When the sealing sleeve 41 is inserted into the sealing cavity 33, the sealing rings are compressed and deformed, filling the annular gap between the sealing sleeve 41 and the inner wall of the sealing cavity 33, thus achieving a seal. The multiple sealing rings form segmented barriers, improving the sealing performance.
[0090] In other embodiments, such as Figure 4 As shown, the first sealing component 42 includes a first sealing ring 421 and a first sealing gasket 422. The first sealing ring 421 and the first sealing gasket 422 are alternately arranged on the inner peripheral wall of the sealing sleeve 41 to seal the gap between the sealing sleeve 41 and the cable core 201.
[0091] In this embodiment, the first sealing component 42 includes a first sealing ring 421 and a first sealing gasket 422, which are alternately installed on the inner peripheral wall of the sealing sleeve 41. When the cable core 201 passes through the sealing sleeve 41, the sealing ring and the sealing gasket come into contact with the surface of the cable core 201 in sequence, forming a multi-segment contact seal to block water seepage channels along the axial direction of the cable core 201.
[0092] The optical cable tensile joint device 100 of this invention improves the sealing performance by alternately arranging the first sealing ring 421 and the first sealing gasket 422 on the inner peripheral wall of the sealing sleeve 41 and utilizing the differences in deformation characteristics of different sealing elements to enhance the adaptability to minor unevenness on the surface of the cable core 201.
[0093] In some embodiments, such as Figure 4 As shown, the connector assembly includes a second sealing assembly 5, which includes a plurality of second sealing rings 51. The plurality of second sealing rings 51 are spaced apart on the outer periphery of the connector portion 31. The mounting cylinder 301 includes a cylindrical section 303, and the connector portion 31 and the cylindrical section 303 are sealed together by the second sealing assembly 5.
[0094] In this embodiment, the second sealing assembly 5 employs multiple second sealing rings 51, which are spaced apart along the outer circumferential surface of the connector portion 31. When the connector portion 31 is inserted into the cylindrical section 303, the second sealing rings 51 are compressed and deformed, filling the annular gap between the connector portion 31 and the cylindrical section 303, forming multiple seals. The multiple ring arrangement increases the length and tortuosity of the seepage path.
[0095] The optical cable tensile joint device 100 of this invention achieves multi-point sealing of the mating area between the joint 31 and the mounting cylinder 301 by setting multiple spaced second sealing rings 51 on the outer periphery of the joint 31, thereby improving the sealing stability of the interface under long-term water pressure.
[0096] In some embodiments, such as Figure 10 As shown, the mounting cylinder 301 includes an opening section 304, and a second conical cavity 3041 is provided inside the opening section 304. The optical cable tensile joint device 100 includes a third sealing component 6, which includes a third sealing element 61 and a rubber shell 63.
[0097] The third seal 61 includes a tapered portion 611 that extends into the opening section 304 and fits against the inner circumferential surface of the second tapered cavity 3041.
[0098] One end of the rubber shell 63 is fitted onto the tube body 1, and the other end is spaced apart from the third sealing element 61 to form an annular groove 302, with the open section 304 embedded in the annular groove 302.
[0099] In this embodiment, the open section 304 is connected to the cylindrical section 303, the open section 304 is located at the opening of the cylindrical section 303, and the open section 304 is provided with a second conical cavity 3041.
[0100] The third sealing assembly 6 is used to seal the end opening of the mounting cylinder 301. The tapered portion 611 of the third sealing member 61 extends into the opening section 304 and fits against the second tapered cavity 3041 in the opening section 304 of the mounting cylinder 301 to form a tapered surface seal.
[0101] The left end of the rubber shell 63 is fixed to the tube body 1, and the right end of the rubber shell 63 forms an annular groove 302 with the third sealing element 61. When the optical cable tensile joint device 100 is installed in the mounting cylinder 301, the opening section 304 of the mounting cylinder 301 is embedded in the annular groove 302.
[0102] The optical cable tensile joint device 100 of this embodiment of the invention forms a composite seal at the opening section 304 through the conical surface cooperation between the third sealing member 61 and the second conical cavity 3041 and the embedded structure of the rubber shell 63 and the annular groove 302 of the opening section 304, thereby enhancing the sealing performance at the connection between the optical cable tensile joint device 100 and the joint box 300.
[0103] In other embodiments, such as Figure 5 As shown, the third seal 61 includes a protrusion 612 and a recessed area 312 on the joint portion 31, with the protrusion 612 fitting against the recessed area 312.
[0104] The rubber shell 63 includes an abutment portion 631, which presses against the third sealing member 61 under water pressure so that the protrusion 612 fits against the recessed area 312.
[0105] In this embodiment, the protrusion 612 of the third seal 61 forms a mating surface with the recessed area 312 on the connector 31, which is used to restrict relative movement and enhance the tortuosity of the sealing path.
[0106] One end of the rubber shell 63 is fitted onto the pipe body 1, and the other end is provided with an abutment part 631. The abutment part 631 contacts the end face of the third sealing member 61. Under the action of external water pressure, the water pressure pushes the abutment part 631 of the rubber shell 63 to squeeze the third sealing member 61 inward, so that the protrusion 612 fits more tightly in the recessed area 312, thereby improving the contact pressure and sealing reliability between the two. At the same time, this structure uses external water pressure as a driving force to enhance the seal, so that the sealing performance tends to be stable as the water depth increases.
[0107] In other embodiments, such as Figure 6 As shown, the fourth sealing assembly 7 includes a nut 71, a sealing cone 72, and a sealing cylinder 73.
[0108] Nut 71 is fitted onto optical cable 200, located at the end of locking assembly 2 opposite to connector 3, and at the opening of locking assembly 2. In other words, nut 71 is located at the opening on the left end of locking assembly 2.
[0109] A sealing cone 72 is fitted onto the optical cable 200, and a sealing cylinder 73 is fitted onto the sealing cone 72. One end of the sealing cone 72 is provided with a first inclined surface 721, and the sealing cylinder 73 is provided with a second inclined surface. The sealing cone 72 is squeezed by turning the nut 71, so that the first inclined surface 721 and the second inclined surface fit together.
[0110] In this embodiment, the nut 71 is located on the left side of the sealing cone 72. The outer surface of the nut 71 and the inner surface of the locking assembly 2 are threaded together for threaded connection. When the nut 71 is tightened, it pushes the sealing cone 72 to the right, causing the first inclined surface 721 on the sealing cone 72 to gradually come into contact with the second inclined surface on the sealing cylinder 73 and generate a mutual squeezing action. As the nut 71 is continuously tightened, the inclined surface engagement causes the sealing cone 72 to undergo radial elastic deformation, causing its inner wall to converge towards the surface of the optical cable 200. This creates a uniform contact pressure between the sealing cone 72 and the outer periphery of the optical cable 200, achieving a tight fit and effectively blocking the gap between the optical cable 200 and the locking assembly 2, thus improving the sealing performance of this area.
[0111] The optical cable tensile joint device 100 of this embodiment generates radial clamping force during the tightening process through the inclined surface mating structure, so that the sealing cone 72 self-tightens and adheres to the outer periphery of the optical cable 200, thereby improving the sealing performance of the left inlet of the locking assembly 2.
[0112] The optical cable tensile joint device 100 of this invention, by setting a first sealing component 4, a second sealing component 5, a third sealing component 6, and a fourth sealing component 7, seals the glue-filling cavity 34, the gap between the joint portion 31 and the mounting cylinder 301, the opening of the mounting cylinder 301, and the space between the optical cable 200 and the locking component 2 at different positions of the optical cable tensile joint device 100, forming a comprehensive sealing structure. The optical cable tensile joint device 100 of this invention covers the main water seepage paths during the insertion and connection of the optical cable 200, improving the sealing capability of the optical cable tensile joint device 100 in application environments with water depths of meters. The sealing components are distributed in different positions and work together to help maintain the internal sealing state of the optical cable tensile joint device 100.
[0113] In some embodiments, such as Figure 1 As shown, the pipe body 1 includes a protective section 12, a bending limit section 13, and a guide section 14 connected in sequence.
[0114] The protective section 12 is fitted onto the tail 32, and the protective section 12 and the tail 32 are respectively provided with a third hole. The third fastener is inserted through the third hole so as to fix the protective section 12 and the tail 32.
[0115] The bending limit segment 13 includes multiple bending limit rings 131 connected in sequence, and two adjacent bending limit rings 131 can rotate relative to each other.
[0116] The guide section 14 is fixedly connected to one end of the bending limit section 13.
[0117] In this embodiment, the pipe body 1 is divided into a protective section 12, a bending limit section 13, and a guide section 14 from right to left.
[0118] The protective section 12 is located near the tail 32 of the connector and is fixed to the tail 32 by a third fastener.
[0119] The bending limiting section 13 comprises multiple relatively rotatable bending limiting rings 131, which limit the bending angle of the optical cable 200 and prevent the optical fiber from being damaged due to excessive bending. The guide section 14 is located at the left end of the tube body 1 and is used to guide the optical cable 200 into the tube body 1. The sections are connected in sequence to form a complete external protective structure.
[0120] The optical cable tensile splice device 100 of this invention, by setting a bend-limiting section 13 composed of multiple movable bend-limiting rings 131, effectively controls the bending radius of the optical cable 200 in the splice area, reducing the risk of optical fiber damage due to bending during laying and operation.
[0121] Optionally, a fifth seal 17 is provided between the outer peripheral wall of the locking assembly 2 and the inner peripheral wall of the tail 32 to seal the gap between the locking assembly 2 and the tail 32. For example, the outer peripheral wall of the stage 243 fits against the inner peripheral wall of the tail 32, and the fifth seal 17 is provided on the outer peripheral wall of the stage 243.
[0122] The optical cable tensile splice device 100 of this embodiment of the invention achieves mechanical anchoring by pressing the steel wire 2021 into the first conical cavity 21 through the inner cone 22, and combines the U-shaped part 2022 formed by bending the end of the steel wire 2021 and fixing it in the glue potting cavity 34 by glue potting, thus forming a double tensile structure. The left end of the pre-twisted wire 9 is connected to the outer sheath 203 of the optical cable 200, and the right end is pressed and fixed to the locking component 2 by the clamping ring 10, so as to effectively transmit the tensile force of the outer sheath 203; the tail 32 of the splice 3 is sleeved on the outer periphery of the locking component 2 and locked by the threaded connection and the first fastener 15 to enhance the connection strength; at the same time, the annular protrusion 311 of the splice part 31 cooperates with the annular groove 302 of the mounting cylinder 301 and is fixed by the second fastener, so that the splice and the splice box 300 form a stable connection. The above structures together form a complete stress path from the outer sheath 203 of the optical cable 200, the steel wire layer 202 to the main body and external installation structure of the optical cable tensile joint device 100, realizing a multi-level, multi-component collaborative tensile system and improving the tensile strength of the optical cable tensile joint device 100.
[0123] As the optical cable 200 enters the optical cable tensile splice device 100, it is peeled off layer by layer. The outer sheath 203 remains relatively intact on the outermost side and is connected to the pre-twisted wire 9. When the optical cable 200 enters the inner tube 24, the outer sheath 2031 is torn open first, and then the sheath 2032 is injection molded together with the injection-molded rubber 8. One end of the injection-molded rubber 8 is connected to the sheath 2032 of the optical cable 200, and the other end is connected to the covering section 241 on the inner tube 24. As the optical cable 200 continues to advance inward, after entering the first conical cavity 21 of the locking assembly 2, the steel wire layer 202 is torn open, exposing the steel wires 2021. The inner cone 22 applies radial pressure to the steel wires 2021, pressing them against the inner wall of the first conical cavity 21 to achieve mechanical anchoring. The end of the steel wire 2021 is bent into a U-shaped part 2022 and extends into the glue-filling cavity 34 of the connector 3. Finally, when the optical cable 200 continues to move forward and passes through the sealing cavity 33, only the inner cable core 201 remains. The cable core 201 extends out of the connector after passing through the sealing cavity 33 and the glue-filling cavity 34, and finally enters the connector box 300.
[0124] The optical cable tensile joint device 100 of this invention has strong tensile strength, good sealing performance, and can operate stably in the deep sea environment.
[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A tensile splice device for optical cables, wherein the optical cable (200) comprises a cable core (201), a steel wire layer (202), and an outer sheath (203), characterized in that, The connector assembly includes a connector assembly and a connector box (300), two of the connector assemblies being connected to the connector box (300), the connector assembly comprising: The tube (1) has a cavity (11) inside, and the optical cable (200) passes through the cavity (11). A locking assembly (2) is disposed in the cavity (11) and sleeved on the optical cable (200). One end of the locking assembly (2) is fixedly connected to the outer sheath (203). The locking assembly (2) is provided with a first conical cavity (21). The locking assembly (2) includes an inner cone (22). After the outer sheath (203) is stripped off, the optical cable (200) extends into the first conical cavity (21). The inner cone (22) is used to press the steel wires (2021) of the steel wire layer (202) onto the surface of the first conical cavity (21). The connector (3) includes a connector portion (31) located outside the tube body (1) and a tail portion (32) extending into the cavity (11). The tail portion (32) is fixedly connected to the locking assembly (2). The connector (3) has a potting cavity (34) communicating with the first conical cavity (21). One end of the steel wire (2021) is bent to form a U-shaped part (2022), which is located in the glue-filling cavity (34) and fixed by glue.
2. The optical cable tensile joint device according to claim 1, characterized in that, The connector assembly includes: The pre-twisted wire (9) is placed in the cavity (11) and sleeved on the optical cable (200). One end is fixedly connected to the outer sheath (203), and the other end is fixedly connected to the locking assembly (2).
3. The optical cable tensile joint device according to claim 2, characterized in that, The connector assembly includes: The other end of the pre-twisted wire (9) is sleeved on the locking assembly (2). The clamping ring (10) is sleeved on the overlapping part of the pre-twisted wire (9) and the locking assembly (2) so as to fix the pre-twisted wire (9) and the locking assembly (2).
4. The optical cable tensile joint device according to claim 1, characterized in that, The tail (32) is sleeved on the outer periphery of the locking assembly (2) and threadedly connected to the locking assembly (2); Both the locking assembly (2) and the tail (32) are provided with a first hole, and the first fastener (15) passes through the first hole to fix the locking assembly (2) and the tail (32).
5. The optical cable tensile joint device according to claim 1, characterized in that, The junction box (300) includes a mounting sleeve (301), and the connector (31) is installed inside the mounting sleeve (301); The connector (31) is provided with an annular protrusion (311), and the mounting cylinder (301) is provided with an annular groove (302) that mates with the annular protrusion (311). The annular protrusion (311) and the annular groove (302) are respectively provided with a second hole. The second fastener passes through the second hole so as to fix the connector (31) and the mounting cylinder (301).
6. The optical cable tensile joint device according to claim 2, characterized in that, The locking assembly (2) includes an outer tube (23), an inner tube (24), and an injection-molded rubber sheet (8). One end of the outer tube (23) is connected to the pre-twisted wire (9). The outer tube (23) is sleeved on the inner tube (24). The inner tube (24) includes the following components arranged in sequence: The outer circumferential surface of the covering section (241) is provided with multiple protrusions; The body (242) has the first conical cavity (21) formed inside. The platform stage (243) has an outer diameter larger than that of the body (242). A transition cavity (2431) is formed inside the platform stage (243). The transition cavity (2431) is connected to the glue-filling cavity (34) and the first conical cavity (21). The platform stage (243) abuts against the end face of the outer tube (23). The injection molding rubber sheet (8) is disposed between the outer tube (23) and the inner tube (24). One end of the injection molding rubber sheet (8) is fixedly connected to the outer skin (203), and the other end of the injection molding rubber sheet (8) is fixedly connected to the covering section (241).
7. The optical cable tensile joint device according to claim 1, characterized in that, The connector (3) includes: A sealing cavity (33) has an opening located on the end face of the connector (3). A partition (35) is used to separate the sealing cavity (33) from the glue-filling cavity (34), and it is provided with a through hole. The cable core (201) passes through the first conical cavity (21), the glue-filling cavity (34), the through hole, and the sealing cavity (33) and extends to the outside of the connector (3). The optical cable tensile joint device includes a first sealing component (4), which is disposed in the sealing cavity (33) to seal the glue-filling cavity (34).
8. The optical cable tensile joint device according to claim 7, characterized in that, The first sealing assembly (4) includes: A sealing sleeve (41) is disposed in the sealing cavity (33). The inner circumferential surface of the sealing sleeve (41) is in contact with the cable core (201), and the outer circumferential surface of the sealing sleeve (41) is in contact with the inner circumferential surface of the sealing cavity (33). A first sealing component (42) is disposed on the inner peripheral wall of the sealing sleeve (41) to seal the gap between the sealing sleeve (41) and the cable core (201); and / or, is disposed on the outer peripheral wall of the sealing sleeve (41) to seal the gap between the sealing sleeve (41) and the sealing cavity (33); A plug (43) is fitted onto the cable core (201) and installed in the opening.
9. The optical cable tensile joint device according to claim 5, characterized in that, The connector assembly includes a second sealing assembly (5), which comprises: Multiple second sealing rings (51) are spaced apart on the outer periphery of the joint portion (31), and the mounting cylinder (301) includes a cylindrical section (303). The joint portion (31) and the cylindrical section (303) are sealed together by the second sealing assembly (5).
10. The optical cable tensile joint device according to claim 1, characterized in that, The tube (1) includes: A protective section (12) is fitted onto the tail (32), and a third hole is provided on the protective section (12) and the tail (32) respectively. A third fastener is inserted through the third hole to fix the protective section (12) and the tail (32). The bending limit section (13) includes multiple bending limit rings (131) connected in sequence, and two adjacent bending limit rings (131) can rotate relative to each other; The guide section (14) is fixedly connected to one end of the bending limiting section (13); The protective section (12), the bending limit section (13), and the guide section (14) are connected in sequence.