Manufacturing process of optical cable flexible joint

Abstract

The application discloses a manufacturing process of an optical cable flexible joint, which is applied to optical cable connection and has the steps as follows: sleeving a heat-shrinkable tube, stripping an outer protective layer, separating a steel wire layer, stripping an inner protective layer, sleeving a connecting steel pipe, cutting a protective steel pipe, cleaning protective oil on the surface of a wire core, cutting the wire core, fusing an optical fiber, detecting fusion loss of the fused optical fiber, coating surface protective oil, detecting tension of the optical fiber, ensuring fusion quality, moving two ends of the steel pipe to be respectively overlapped on two protective steel pipes, injecting waterproof glue, repairing the inner protective layer, restoring the steel wire layer, repairing the outer protective layer, heating to make the heat-shrinkable tube cover the outer protective layer, and completing the connection of the optical cable. The application provides a manufacturing process of an optical cable flexible joint for realizing the connection of the optical cable.

Description

Technical Field

[0001] This invention relates to the field of optical cable connection, specifically to the manufacturing process of optical cable flexible joints. Background Technology

[0002] During long-distance optical cable laying, there are situations where the produced length of the optical cable cannot meet the laying distance, thus requiring splicing. In addition, during the use of optical cables, they are easily damaged due to harsh environments or animal damage, so optical cables need to be connected and repaired. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a manufacturing process for an optical cable flexible connector for connecting optical cables.

[0004] The technical solution adopted by this invention to solve the above problems is as follows: a manufacturing process for an optical cable flexible joint, applied to optical cable connection, wherein the optical cable comprises, from the inside out, a conductor, a protective steel tube, an inner sheath, an armored steel wire layer, and an outer sheath, and the steps are as follows: S1: Place the connection ends of the two optical cables to be connected on the workbench; S2: Connect a heat shrink tubing with a length greater than the combined length of the two optical cables to one of the optical cables; S3: Reserved stripping distance for the outer layer of the wire core; S4: Remove the outer protective layer; S5: Discrete armored steel wire layer, with a corresponding length of armored steel wire reserved; S6: Remove the inner protective layer; S7: A connecting steel pipe is attached to the outer layer of the protective steel pipe of one of the optical cables, and the connecting steel pipe abuts against the stripping section of the inner sheath. S8: Cut off the protective steel pipes at the upper ends of the two optical cables and remove the cut protective steel pipes to expose the wire cores; S9: Protective oil for cleaning the surface of the wire core; S10: Use a fiber optic cutter to cut the wire cores so that the two wire cores reach the specified size; S11: The fiber optic fusion splicer is used to splice multiple optical fibers in the core one by one. S12: Perform fusion splice loss detection on the spliced ​​optical fiber; S13: Place the optical fiber into the coating machine for surface protective oil coating; S14: Perform tensile testing on the optical fiber to ensure splicing quality; S15: Move the connecting steel pipe to the welding position and overlap both ends of the moving steel pipe with the two protective steel pipes respectively; S16: Inject waterproof adhesive at the connection between the connecting steel pipe and the protective steel pipe; S17: Repair the inner protective layer; S18: Restore the armor steel wire layer; S19: Outer protective layer repair; S20: Move the heat shrink tubing to the outer layer of the outer protective layer and heat it to make the heat shrink tubing cover the outer protective layer; S21: Complete the fiber optic cable connection.

[0005] Compared with the prior art, the advantages of the present invention are as follows: Through the design of steps S1-S9, the outer layer of the optical fiber is stripped during the connection of the optical cable, ensuring the connection quality and effectiveness of the optical fiber. Steps S2 and S7 prepare for subsequent high-quality repair work of the optical cable. Through the design of steps S10-S14, the high-quality connection of the optical fiber is ensured, guaranteeing the connection strength and subsequent stability of the optical fiber. Through the design of step S15, the protective steel tube inside the optical cable needs to be stripped during the connection process. Without the replacement of the connecting steel tube, the mechanical strength of the optical cable at the connection point will be insufficient, making it easy to be damaged and difficult to maintain the long-term use of the optical cable. Furthermore, through the design of step S16, the water resistance between the protective steel tube and the connecting steel tube is maintained, ensuring the safety of the optical cable in subsequent use. Then, through steps S17-S19, the outer layer structure of the protective steel tube is repaired layer by layer. Finally, through the design of step S20, the connection point of the optical cable is protected, further enhancing the protection strength of the connection point and improving the connection marks at the connection point, thereby enhancing the connection strength.

[0006] As an improvement of the present invention, the optical cable further includes a PVC layer, which is disposed between the core and the protective steel tube. Through this improvement, the design of the PVC layer can ensure the stability of multiple optical fibers in the core within the protective steel tube, while also providing a certain degree of waterproof performance. More importantly, when the protective steel tube is cut to connect two optical cables, the ring cutter can be prevented from cutting the core, providing a certain tolerance thickness and ensuring the comprehensiveness of the cutting thickness when cutting the protective steel tube.

[0007] As an improvement to the present invention, after step S8, the following step is included: S8.1: Flare the ends of the retained protective steel pipe; S8.2: The ends of the PVC layer are processed into a tapered shape, and the ends of the PVC layer are located inside the flared opening; Following step S14, the following steps are included: S14.1: Use PTEF tape to wrap the conductors in a semi-overlapping manner, from the end of the PVC layer of one cable to the end of the PVC layer of another cable; S14.2: The end of the retained protective steel pipe is narrowed and grooved to fix the PTEF tape. This improvement addresses the issue that when the protective steel pipe is cut, the PVC layer is prone to cutting marks at the cross-section, requiring trimming. In step S8.1, the protective steel pipe is widened to facilitate trimming of the PVC layer at the cross-section. In step S8.2, the end of the PVC layer is designed to be tapered, facilitating the connection between the PVC layer and the cross-section of the repair structure during repair. The design of the PVC layer end within the widened section facilitates fixation of the PVC layer and the repair structure after the protective steel pipe is narrowed, reducing the need for other fixing structures and ensuring that the cross-sections of each layer are not at the same cross-sectional position, thus providing effective anti-permeability. Through the design of steps S14.1 and S14.2, the PVC layer is repaired, ensuring comprehensive adhesion and stability. The PTEF tape is used as the repair material because it has heat insulation properties, preventing the protective oil on the optical fiber from detaching or deforming due to heat during subsequent repair processes.

[0008] As an improvement of the present invention, step S15 includes step S15.1: groove fixing at the overlap of the connecting steel pipe and the protective steel pipe. Through the improvement, during the repair process, the connection between the connecting steel pipe and the protective steel pipe cannot be fixed by welding due to the protective oil. High temperature can easily cause the protective oil to detach and deform. Therefore, the groove fixing process is adopted, which also ensures the firmness and stability of the connection.

[0009] As an improvement of the present invention, step S17 includes the following steps: S17.1: The end face of the inner protective layer of the body is machined into a tapered shape; S17.2: Use 320-grit and 600-grit sandpaper to polish the end face of the inner protective layer of the body in sequence; S17.3: A layer of PE material tape is wrapped around the outer layer of the connecting steel pipe and the protective steel pipe using a semi-overlapping wrapping method, with both ends of the PE material tape overlapping the end face of the inner protective layer of the main body; S17.4: A layer of PTFE tape is wrapped around the outer layer of the PE tape using a semi-overlapping wrapping method, with both ends of the PTFE tape overlapping the inner protective layer of the body. S17.5: Using a hot air gun to heat evenly at 230℃, the inner protective layer is repaired through the aforementioned improvements. The design of S17.1 and S17.2 ensures the tightness of the connection between the repaired inner protective layer and the main body's inner protective layer, reduces the formation of air bubbles during subsequent welding, and ensures welding quality. The wrapping of PTFE tape avoids the deformation of the PE tape when forming the repaired inner protective layer, ensuring repair quality and thus ensuring the firmness and stability of the repair.

[0010] As an improvement of the present invention, step S5 includes step S5.1: according to the reserved length and thickness of the armored steel wire layer, a connecting ring made of stainless steel is fitted onto the outer sheath of a cable. Through the improvement, the armored steel wire layer is easier to repair.

[0011] As an improvement to the present invention, step S18 includes the following steps: S18.1: Move the connecting ring to the junction of the two cables; S18.2: Retwist the armor steel wires according to the pitch of the armor steel wire layer of the main body; S18.3: The two ends of the connecting ring are fixedly connected to the two armored steel wire layers with epoxy resin glue. Through the above improvement, the completeness of the repair of the armored steel wire layer is guaranteed without the use of welding process, and the quality of the protective oil is guaranteed. If the armored steel wire in the armored steel wire layer is not cut in step S5, the armored steel wire may be misaligned during the repair process. In this case, there is not enough space for repair, and the repair can only be done by welding process, which is not conducive to the use of protective oil.

[0012] As an improvement of the present invention, after step S4, step S4.1 is included: attaching a clamping tube to the armored steel wire layer of two of the optical cables; Step S18 also includes the following steps: S18.4: Wrap nylon tape around the outside of the armored steel wire layer to secure the armored steel wire; S18.5: Use a clamp tube to fix the nylon tape to the outer layer of the armored steel wire layer. With the above improvement, because the armored steel wire layer is fixed and repaired with glue, its mechanical strength is slightly low. Therefore, it is necessary to add nylon tape to enhance the mechanical strength of the optical cable after repair. The clamp tube is used to ensure the connection firmness after the nylon tape is wrapped.

[0013] As an improvement to the present invention, step S19 includes the following steps: S19.1: The end face of the outer protective layer of the main body is machined into a tapered shape; S19.2: Use 320-grit and 600-grit sandpaper to polish the outer protective layer end face of the body in sequence;

[0014] S19.3: Use a semi-overlapping wrapping method to evenly wrap PE material strips around the outer protective layer area to be repaired, and overlap them on the two outer protective layer end faces of the main body; S19.4: Silicone heat shrink tubing, high-temperature tape, and PTFE tape are semi-overlapped and wrapped around the outer layer of the PE material tape; S19.5: A layer of copper mesh is wrapped around the outer layer of silicone heat shrink tubing, high temperature tape, and PTFE tape; S19.6: Heat the outer layer of the copper mesh to 170℃ using a heating band and keep it at that temperature for 30 minutes; S19.7: Cooling, removing the heating band, copper mesh, silicone heat shrink tubing, high-temperature band, and PTFE band. Through the improvements and the design of S19.1 and S19.2, the tightness of the connection between the repaired outer sheath and the outer sheath of the main body is ensured, reducing the formation of bubbles during subsequent welding and ensuring welding quality. Then, through S19.3 to S19.7, the wrapped PE material tape forms the repaired outer sheath and is welded and shaped with the outer sheath of the main body.

[0015] As an improvement of the present invention, the wrapping thickness of the PE tape is greater than the thickness of the outer protective layer of the main body, and the connection between the repaired outer protective layer formed by the PE tape and the outer protective layer of the main body forms a conical surface. Through the above improvement, when the heat shrink tube shrinks in step S20, the connection between the repaired outer protective layer and the outer protective layer of the main body forms a conical surface, which can fix the heat shrink tube to the outer layer of the repaired outer protective layer after shrinking, and prevent it from moving at will, thus ensuring the protective stability of the heat shrink tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the optical cable of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure at the end of the two cable stripping operation of this invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the protective steel pipe flaring according to the present invention.

[0019] Figure 4 This is a cross-sectional structural diagram of the connecting steel pipe of the present invention.

[0020] Figure 5 This is a schematic diagram of the connection structure of the inner protective layer of the present invention before repair.

[0021] Figure 6 This is a schematic diagram of the cross-sectional connection structure after the inner protective layer of the present invention has been repaired.

[0022] Figure 7 This is the present invention. Figure 6 Enlarged structural diagram of section A in the middle.

[0023] Figure 8 This is a schematic diagram of the cross-sectional connection structure of the outer protective layer of the present invention after repair.

[0024] The diagram shows: 1. Optical cable, 1.1. Core wire, 1.2. Protective steel pipe, 1.3. Inner sheath, 1.4. Armored steel wire layer, 1.5. Outer sheath, 1.6. PVC layer, 2. Heat shrink tubing, 3. Connecting steel pipe, 4. Waterproof adhesive, 5. PTFE tape, 6. Repair inner sheath, 6.1. PTFE tape, 7. Connecting ring, 8. Nylon tape, 9. Tube clamp, 10. Repair outer sheath. Detailed Implementation

[0025] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1 As shown, a manufacturing process for an optical cable flexible joint is applied to the connection of optical cable 1. The optical cable 1 includes, from the inside out, a conductor 1.1, a PVC layer 1.6, a protective steel tube 1.2, an inner sheath, an armored steel wire layer 1.4, and an outer sheath. The steps are as follows: like Figure 2 As shown, S1: Place the connection ends of the two optical cables 1 to be connected on the workbench; S2: Connect a heat shrink tubing 2 with a length greater than the combined length of the two optical cables 1 to one of the optical cables 1; S3: Reserved stripping distance of 1.1mm for the outer layer of the wire core; S4: Remove the outer protective layer; S4.1: Connecting tubes 9 are sleeved on the armored steel wire layer 1.4 of two of the optical cables 1; S5: Discrete armored steel wire layer 1.4, with a corresponding length of armored steel wire reserved; S5.1: Based on the reserved length and thickness of the armored steel wire layer 1.4, a connecting ring 7 made of stainless steel is fitted onto the outer sheath of a cable. S6: Remove the inner protective layer; S7: A connecting steel pipe 3 is attached to the outer layer of the protective steel pipe 1.2 of one of the optical cables 1, and the connecting steel pipe 3 abuts against the stripping section of the inner sheath; S8: Cut off the protective steel pipes 1.2 at the upper ends of the two optical cables 1, and remove the cut protective steel pipes 1.2 to expose the wire cores 1.1; like Figure 3 As shown, S8.1: Flaring the end of the retained protective steel pipe 1.2; S8.2: The end of PVC layer 1.6 is processed into a tapered shape, and the end of PVC layer 1.6 is located inside the flare. S9: Clean the protective oil on the surface of the core 1.1; S10: Use a fiber optic cutter to cut the wire core 1.1 so that the two wire cores 1.1 reach the specified size; S11: The multiple optical fibers in core 1.1 are spliced ​​one by one using an optical fiber fusion splicer; S12: Perform fusion splice loss detection on the spliced ​​optical fiber; S13: Place the optical fiber into the coating machine for surface protective oil coating; S14: Perform tensile testing on the optical fiber to ensure splicing quality; like Figure 4As shown, S14.1: PTEF tape with 5 pairs of cores 1.1 is used for semi-overlapping wrapping, from the end of the PVC layer 1.6 of one cable to the end of the PVC layer 1.6 of another cable; S14.2: The end of the retained protective steel pipe 1.2 is narrowed and grooved to fix the PTEF band 5; S15: Move the connecting steel pipe 3 to the welding position, and make both ends of the moving steel pipe overlap the two protective steel pipes 1.2 respectively; S15.1: Secure the joint between the connecting steel pipe 3 and the protective steel pipe 1.2 by pressing a groove; S16: Inject waterproof adhesive 4 at the connection between the connecting steel pipe 3 and the protective steel pipe 1.2; like Figure 5-7 As shown, S17: Repair the inner protective layer; S17.1: The end face of the inner protective layer 1.3 of the body is machined into a tapered shape; S17.2: Use 320-grit and 600-grit sandpaper to sand the inner protective layer 1.3 end face in sequence; S17.3: A layer of PE material tape is wrapped around the outer layer of the connecting steel pipe 3 and the protective steel pipe 1.2 using a semi-overlapping wrapping method, with both ends of the PE material tape overlapping the end face of the inner protective layer 1.3 of the main body; S17.4: A layer of PTFE tape 6.1 is wrapped around the outer layer of the PE tape using a semi-overlapping wrapping method, with both ends of the PTFE tape 6.1 overlapping the inner protective layer 1.3 of the body; S17.5: Use a hot air gun to heat evenly at 230℃ to fuse the PE strip and form the repair inner protective layer 6; S18: Restore 1.4 layers of armor steel wire; S18.1: Move the connecting ring 7 to the junction of the two cables; S18.2: Retwist the armor steel wires according to the 1.4 pitch of the armor steel wire layer of the body; S18.3: The two ends of the connecting ring 7 are respectively fixedly connected to the two armored steel wire layers 1.4 with epoxy resin glue; S18.4: Wrap nylon tape 8 around the outside of the armored steel wire layer 1.4 to secure the armored steel wire; S18.5: Use the clamp tube 9 to fix the nylon tape 8 to the outer layer of the armored steel wire layer 1.4; like Figure 8 As shown, S19: outer protective layer repair; S19.1: The end face of the outer protective layer 1.5 of the body is machined into a tapered shape; S19.2: Use 320-grit and 600-grit sandpaper to sand the 1.5-inch end face of the outer protective layer of the body in sequence; S19.3: The PE material tape is evenly wrapped around the outer protective layer area to be repaired using a semi-overlapping wrapping method, and overlapped on the two outer protective layers 1.5 end faces of the main body. The wrapping thickness of the PE material tape is greater than the thickness of the outer protective layer 1.5 of the main body. The connection between the repair outer protective layer 10 formed by the PE material tape and the outer protective layer 1.5 of the main body forms a conical surface. S19.4: Silicone heat shrink tubing, high-temperature tape, and PTFE tape are semi-overlapped and wrapped around the outer layer of the PE material tape 6.1; S19.5: A copper mesh is wrapped around the outer layer of silicone heat shrink tubing, high temperature tape, and PTFE tape 6.1; S19.6: Heat the outer layer of the copper mesh to 170°C using a heating tape and keep it at that temperature for 30 minutes to fuse the PE material tape into a repair outer protective layer 10; S19.7: Cooling, remove heating band, copper mesh, silicone heat shrink tubing, high temperature band, and PTFE band 6.1; S20: Move the heat shrink tubing 2 to the outer layer of the outer protective layer and heat it to make the heat shrink tubing 2 cover the outer protective layer; S21: Complete the connection of optical cable 1.

[0027] In this invention, a PVC layer 1.6 is added to the optical cable 1. This not only ensures the water resistance of the optical cable 1 during use, but also prevents damage to the core 1.1 during the circumferential cutting of the protective steel pipe 1.2, ensuring the quality of the circumferential cutting. The PVC layer 1.6 that is subsequently removed is replaced by a PTEF tape 5. The heat insulation and high temperature resistance properties of the PTEF tape 5 are used to provide heat insulation protection for the protective oil on the surface of the core 1.1, preventing the protective oil from detaching from the optical fiber surface due to heat. In terms of fixing the PTEF tape 5, the end of the PTEF tape 5 is fixed to the inside of the protective steel pipe 1.2 by flaring the end of the protective steel pipe 1.2, ensuring the fixed connection of the PTEF tape 5. During the repair of optical cable 1, neither the connection between the protective steel pipe 1.2 and the connecting steel pipe 3 nor the welding of the armored steel wire layer 1.4 were welded. This was to avoid the high temperature exceeding 1000℃ affecting the uniformity of the protective oil coating. Instead, processes such as grooving, water-blocking adhesive, and epoxy resin adhesive were used for connection. This ensured both the connection and the quality of optical cable 1. The welding temperatures of the PE tape for repairing the inner sheath 6 and the inner sheath 1.3, as well as the welding temperatures of the PE tape for repairing the outer sheath 10 and the outer sheath 1.5, were lower. Hot air guns, heating tapes, and copper mesh were used, and the heating temperature was controlled within the high temperature resistance range of the PTEF tape 5 to ensure the coating effect of the protective oil.

[0028] Through the design of this invention, after the optical cable 1 is connected, the splicing quality of the optical fiber in the optical cable 1, the stability of the protective oil, and the overall mechanical strength of the optical cable 1 are guaranteed, thereby ensuring the connection quality and usage quality of the optical cable 1 after connection.

[0029] The above description only illustrates the preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of this invention are also within the scope of protection of this invention.

Claims

1. A manufacturing process for an optical cable flexible joint, characterized in that, This is applied to the connection of optical cable (1), which, from the inside out, includes a conductor (1.1), a protective steel tube (1.2), an inner sheath, an armored steel wire layer (1.4), and an outer sheath. The optical cable (1) also includes a PVC layer (1.6), which is located between the conductor (1.1) and the protective steel tube (1.2). The steps are as follows: S1: Place the connection ends of the two optical cables (1) to be connected on the workbench; S2: A heat shrink tubing (2) with a length greater than the connection length of the two optical cables (1) is attached to one of the optical cables (1); S3: Reserved stripping distance for the outer layer of the core (1.1); S4: Remove the outer protective layer; S5: Discrete armored steel wire layer (1.4), with a corresponding length of armored steel wire reserved; S6: Remove the inner protective layer; S7: A connecting steel pipe (3) is attached to the outer layer of the protective steel pipe (1.2) of one of the optical cables (1), and the connecting steel pipe (3) abuts against the stripping section of the inner sheath; S8: Cut off the protective steel pipes (1.2) at the upper ends of the two optical cables (1) and remove the cut protective steel pipes (1.2) to expose the wire cores (1.1); S8.1: Flare the end of the retained protective steel pipe (1.2); S8.2: The end of the PVC layer (1.6) is processed into a tapered shape, and the end of the PVC layer (1.6) is located inside the flared opening; S9: Clean the protective oil on the surface of the core (1.1); S10: Use a fiber optic cutter to cut the wire core (1.1) so that the two wire cores (1.1) reach the specified size; S11: The multiple optical fibers in the core (1.1) are spliced ​​one by one using an optical fiber fusion splicer; S12: Perform fusion splice loss detection on the spliced ​​optical fiber; S13: Place the optical fiber into the coating machine for surface protective oil coating; S14: Perform tensile testing on the optical fiber to ensure splicing quality; S14.1: Use PTEF tape (5) to wrap the wire core (1.1) in a semi-overlapping manner from the end of the PVC layer (1.6) of one cable to the end of the PVC layer (1.6) of another cable; S14.2: The ends of the retained protective steel pipe (1.2) are narrowed and grooved to fix the PTEF band (5); S15: Move the connecting steel pipe (3) to the welding position and make the two ends of the moving steel pipe overlap the two protective steel pipes (1.2); S16: Inject waterproof adhesive (4) at the connection between the connecting steel pipe (3) and the protective steel pipe (1.2); S17: Repair the inner protective layer; S18: Restore the armor steel wire layer (1.4); S19: Outer protective layer repair; S20: Move the heat shrink tubing (2) to the outer layer of the outer sheath and heat it to make the heat shrink tubing (2) cover the outer sheath; S21: Complete the connection of optical cable (1).

2. The manufacturing process of the optical cable flexible joint according to claim 1, characterized in that, Step S15 includes step S15.1: groove fixing at the overlap of the connecting steel pipe (3) and the protective steel pipe (1.2).

3. The manufacturing process of the optical cable flexible joint according to claim 1, characterized in that, Step S17 includes the following steps: S17.1: The end face of the inner protective layer (1.3) of the body is machined into a tapered shape; S17.2: Use 320-grit and 600-grit sandpaper to polish the end face of the inner protective layer (1.3) of the body in sequence; S17.3: A layer of PE material tape is wrapped around the outer layer of the connecting steel pipe (3) and the protective steel pipe (1.2) using a semi-overlapping wrapping method, with both ends of the PE material tape overlapping the end face of the inner protective layer (1.3) of the main body; S17.4: A layer of PTFE tape (6.1) is wrapped around the outer layer of the PE tape using a semi-overlapping wrapping method, with both ends of the PTFE tape (6.1) overlapping the inner protective layer (1.3) of the body; S17.5: Use a hot air gun to heat evenly at 230℃.

4. The manufacturing process of the optical cable flexible joint according to claim 1, characterized in that, In step S5, step S5.1 is included: according to the reserved length and thickness of the armored steel wire layer (1.4), a connecting ring (7) made of stainless steel is fitted onto the outer sheath of a cable.

5. The manufacturing process of the optical cable flexible joint according to claim 4, characterized in that, Step S18 includes the following steps: S18.1: Move the connecting ring (7) to the junction of the two cables; S18.2: Retwist the armor steel wires according to the pitch of the armor steel wire layer (1.4) of the body; S18.3: The two ends of the connecting ring (7) are fixedly connected to the two armored steel wire layers (1.4) by epoxy resin glue.

6. The manufacturing process of the optical cable flexible joint according to claim 5, characterized in that: After step S4, step S4.1 is included: attaching a clamp tube (9) to the armored steel wire layer (1.4) of two of the optical cables (1). Step S18 also includes the following steps: S18.4: Wrap a nylon tape (8) around the armored steel wire layer (1.4) to secure the armored steel wire; S18.5: Use a clamp tube (9) to fix the nylon tape (8) to the outer layer of the armored steel wire layer (1.4).

7. The manufacturing process of the optical cable flexible joint according to claim 1, characterized in that, Step S19 includes the following steps: S19.1: The end face of the outer protective layer (1.5) of the main body is machined into a tapered shape; S19.2: Use 320-grit and 600-grit sandpaper to polish the outer protective layer (1.5) end face in sequence; S19.3: Use a semi-overlapping wrapping method to evenly wrap PE material strips around the outer protective layer area to be repaired, and overlap them on the two outer protective layer (1.5) end faces of the main body; S19.4: Wrap silicone heat shrink tubing, high temperature tape, and PTFE tape in a semi-overlapping manner around the outer layer of the PE material tape (6.1). S19.5: A copper mesh is wrapped around the outer layer of the silicone heat shrink tubing, high temperature tape, and PTFE tape (6.1); S19.6: Heat the outer layer of the copper mesh to 170℃ using a heating band and keep it at that temperature for 30 minutes; S19.7: Cooling, remove heating band, copper mesh, silicone heat shrink tubing, high temperature band, and PTFE band (6.1).

8. The manufacturing process of the optical cable flexible joint according to claim 7, characterized in that: In step S19.3, the wrapping thickness of the PE strip is greater than the thickness of the outer protective layer (1.5) of the main body, and a conical surface is formed at the connection between the repair outer protective layer (10) formed by the PE strip and the outer protective layer (1.5) of the main body.

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