High-stability anti-interference optical cable

Abstract

The invention relates to the technical field of optical cables, and provides a high-stability anti-interference optical cable, which comprises an outer sheath, an isolation sheath and a fiber bundle, and is characterized in that the outer sheath comprises an enhancement layer, a buffer layer and a protection layer which are sequentially arranged from inside to outside; the isolation sheath is coaxially arranged in the enhancement layer, and a temperature adjusting piece is arranged in the isolation sheath; an installation area is formed between the reinforcing layer and the isolation sheath, and the fiber bundles are arranged in the installation area and are arranged around the axial direction of the isolation sheath. According to the high-stability anti-interference optical cable, the environment adaptability of the optical cable can be improved.

Description

Technical Field

[0001] This application relates to the technical field of optical cables, and in particular to a highly stable anti-interference optical cable. Background Technology

[0002] Optical fiber is a type of cable used to transmit optical signals. It has advantages such as high bandwidth, low attenuation, and anti-interference, and is an indispensable part of modern communication networks. It is widely used in communication fields such as telephone, Internet and cable television.

[0003] In existing technologies, optical cables consist of optical fibers and a protective layer. Optical fibers are thin, elongated glass or plastic fibers that transmit information using light waves, while the protective layer protects them from damage. However, this type of optical cable structure has relatively poor anti-interference capabilities. External factors such as pressure and temperature changes, especially in extremely cold weather conditions, can cause changes in the internal optical fibers and protective materials, adversely affecting the cable's transmission performance. Furthermore, for overhead optical cables, low temperatures and snow can easily cause ice to form on the cable surface, increasing the cable's load and even leading to damage. Therefore, there is an urgent need for a highly stable, anti-interference optical cable to improve its environmental adaptability. Summary of the Invention

[0004] To improve the environmental adaptability of optical cables, this application provides a highly stable anti-interference optical cable.

[0005] The high-stability anti-interference optical cable provided in this application adopts the following technical solution: A highly stable anti-interference optical cable includes an outer sheath, an isolation sheath, and fiber bundles. The outer sheath includes an enhancement layer, a buffer layer, and a protective layer arranged sequentially from the inside out. The isolation sheath is coaxially disposed within the enhancement layer and has a temperature regulating component inside. An installation area is formed between the enhancement layer and the isolation sheath, and multiple fiber bundles are disposed within the installation area and arranged axially around the isolation sheath.

[0006] By adopting the above technical solution, a reinforcement layer, a buffer layer, and a protective layer are sequentially arranged from the inside out on the outer side of the fiber bundle, improving the protection effect of the fiber bundle. When subjected to external compressive force, the buffer layer can provide a good buffering effect for the fiber bundle, improving the optical cable's compression resistance to interference. In extremely cold weather, a temperature regulating device is used for heating, and the heat diffuses outward from the isolation sheath to keep the temperature of the fiber bundle within a reasonable range, reducing the adverse interference caused by low temperature to the optical cable transmission and improving the optical cable's environmental adaptability.

[0007] Optionally, the temperature regulating component includes a heating wire and a conductive wire. The heating wire is disposed inside an insulating sheath, and one end of the conductive wire is electrically connected to the heating wire, while the other end is used to connect to an external power supply device.

[0008] By adopting the above technical solution, electricity is passed to the heating wire through the conductive wire. The resistive material of the heating wire hinders the flow of current, thereby converting electrical energy into heat energy to regulate the internal temperature of the optical cable and keep the internal temperature of the optical cable within a reasonable range.

[0009] Optionally, the fiber bundle includes an inner sheath and an optical fiber. The inner sheath is disposed within the installation area, and the outer surface of the inner sheath abuts against the reinforcing layer and the isolation sheath, respectively. The optical fiber is disposed within the inner sheath.

[0010] By adopting the above technical solution, the combination of the inner and outer sheaths forms a double protection for the optical fiber. In reality, when the outer sheath is broken (such as due to improper installation during construction, strong ultraviolet radiation, or rodent bites), the inner sheath can provide further protection for the optical fiber and improve the environmental anti-interference performance of the overall structure.

[0011] Optionally, the outer peripheral wall of the isolation sheath is fitted with a buffer sleeve, the outer surface of which has multiple positioning arc surfaces, which are corresponding to multiple fiber bundles, and each positioning arc surface is attached to the inner sheath of the corresponding fiber bundle.

[0012] By adopting the above technical solution, the buffer sleeve provides good cushioning for the fiber bundle when subjected to external pressure, reducing the possibility of pressure damage to the fiber bundle. The positioning arc surface on the outer surface of the buffer sleeve not only increases the contact area between the buffer sleeve and the fiber bundle but also positions the fiber bundle, improving the overall structural stability.

[0013] Optionally, an inner filling portion is formed between two adjacent positioning arc surfaces, and the inner filling portion fills the area of ​​the two adjacent fiber bundles near the isolation sheath.

[0014] By adopting the above technical solution, the inner filling part fills the area of ​​the two adjacent fiber bundles near the isolation sheath to fill this area, thereby forming a good fit and support effect for the two adjacent fiber bundles and improving the tightness of the optical cable.

[0015] Optionally, the inner filling part has a limiting strip on the side away from the isolation sleeve. The limiting strip is elastically set, and two limiting slots are respectively opened on the outer surface of the inner sleeve. The two limiting slots of the inner sleeve are respectively used for the limiting strips of two adjacent inner filling parts to match and embed.

[0016] By adopting the above technical solution, a limiting strip is set on the side of the inner filling part away from the isolation sheath, so that the limiting strip is embedded between the inner sheaths of two adjacent fiber bundles, thereby forming a buffer between the two adjacent fiber bundles and improving the compression resistance of the overall structure. In addition, the two limiting slots of the fiber bundle are respectively used for the matching embedding of the limiting strips of the two adjacent inner filling parts, thereby achieving a preliminary fixing effect on the fiber bundle, keeping the inner sheath of the fiber bundle in close contact with the positioning arc surface, and improving the stability of the overall structure.

[0017] Optionally, an outer filler strip is provided between two adjacent fiber bundles, and the outer filler strip fills the area of ​​the two adjacent fiber bundles away from the isolation sheath.

[0018] By adopting the above technical solution, the outer filling strip fills the area of ​​two adjacent fiber bundles away from the isolation sheath to fill this area and improve the compactness of the optical cable.

[0019] Optionally, the outer filler strip has a mating strip on the side near the isolation sleeve, and the surface of the limiting strip has a mating slot for the mating strip to be inserted. The outer filler strip can be detachably installed in the mating slot of the limiting strip through the mating strip.

[0020] By adopting the above technical solution, during the installation of the outer filler strip, the outer filler strip is placed in the area away from the isolation sheath between two adjacent fiber bundles. A certain pressure is applied to the outer filler strip, causing the mating strip of the outer filler strip to engage with the mating groove of the limiting strip, thereby connecting the inner filler part and the outer filler strip into a whole. The combination of the inner filler part and the outer filler strip fixes the fiber bundle to the outside of the buffer sleeve, improving the stability of the overall structure.

[0021] Optionally, the inner filling part is provided with an exhaust channel, the number of exhaust channels is set in accordance with the number of limiting strips, and the inner wall of each exhaust channel is provided with a connecting hole, the connecting hole of the exhaust channel is connected to the docking groove of the corresponding limiting strip.

[0022] By adopting the above technical solution, the design of the exhaust duct and connecting hole allows air in the mating groove of the outer filler strip to be squeezed into the exhaust duct through the connecting hole during the process of the mating strip engaging with the limiting strip, reducing the air pressure resistance during the installation of the outer filler strip. Furthermore, the air in the mating groove is squeezed out through the connecting hole, improving the fit between the mating strip and the inner wall of the mating groove, and enhancing the connection stability between the inner filler and the outer filler strip.

[0023] Optionally, the buffer sleeve is made of thermally conductive silicone, and the outer filling strip is made of thermally insulating silicone; a heat storage cavity is provided inside the outer filling strip, and the heat storage cavity is connected to the exhaust channel.

[0024] By adopting the above technical solution, the inclusion of thermally conductive and thermally insulating silicone provides several advantages. First, it offers excellent buffering for the fiber bundle. Second, the thermally conductive silicone allows heat from the insulating sheath to dissipate outwards through the buffer sleeve. Once outside the buffer sleeve, the thermally insulating silicone of the outer filler strip prevents further heat dissipation, guiding heat to diffuse outwards through the fiber bundle as much as possible, significantly improving temperature regulation and heat utilization. Third, utilizing the relatively poor thermal conductivity of the thermally insulating silicone, a heat storage cavity is created within the outer filler strip. This allows some heat to be retained within the outer filler strip. When the temperature control device stops operating, this heat can be transferred back to the buffer sleeve and dissipated outwards, reducing the adverse effects of low external temperatures on the optical cable's performance.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. A reinforcement layer, a buffer layer, and a protective layer are sequentially arranged from the inside out on the outer side of the fiber bundle to improve the protection of the fiber bundle. When subjected to external compressive force, the buffer layer can provide a good buffering effect for the fiber bundle, improving the optical cable's resistance to compression and interference. In extremely cold weather, a temperature regulating device is used for heating, and the heat diffuses outward from the isolation sheath to keep the temperature of the fiber bundle within a reasonable range, reducing the adverse interference caused by low temperature to the transmission of the optical cable and improving the environmental adaptability of the optical cable. 2. By using limiting strips and connecting strips, during installation of the outer filler strip, it is placed in the area between two adjacent fiber bundles away from the isolation sheath. A certain pressure is applied to the outer filler strip, causing the connecting strip to engage with the connecting groove of the limiting strip, thus connecting the inner filler and the outer filler strip as a whole. The combination of the inner filler and the outer filler strip secures the fiber bundles to the outside of the buffer sleeve, improving the overall structural stability. 3. By incorporating a heat storage cavity, thermally conductive silicone, and thermally insulating silicone, firstly, the thermally conductive and thermally insulating silicone provide excellent buffering for the fiber bundle. Secondly, the thermally conductive silicone allows heat from the insulating sheath to dissipate to the outside of the buffer sleeve. Since the outer filler strip is made of thermally insulating silicone, heat is less likely to diffuse outwards through the filler strip, thus guiding heat to diffuse outwards through the fiber bundle as much as possible, greatly improving the temperature regulation effect and heat utilization rate of the fiber bundle. Thirdly, utilizing the poor thermal conductivity of the thermally insulating silicone, a heat storage cavity is created within the outer filler strip, allowing some heat to be retained. When the temperature control device stops operating, this heat can be transferred back to the buffer sleeve and dissipated outwards, reducing the adverse interference caused by low external temperatures on the optical cable performance. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1; Figure 2This is a partial cross-sectional view of the restraint ring in Embodiment 1; Figure 3 This is a cross-sectional view of the overall structure of Embodiment 2; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a partial cross-sectional view of the mating strip in Example 3; Figure 6 This is a partial cross-sectional view of the exhaust duct in Example 4; Figure 7 This is a partial cross-sectional view of the heat storage chamber in Example 5.

[0027] Explanation of reference numerals in the attached drawings: 1. Outer sheath; 11. Reinforcing layer; 12. Buffer layer; 13. Protective layer; 14. Installation area; 141. Inner filling area; 142. Outer filling area; 2. Isolation sheath; 21. Heating wire; 3. Fiber bundle; 31. Inner sheath; 311. Limiting slot; 312. Avoidance ring groove; 32. Optical fiber; 4. Buffer sleeve; 41. Positioning arc surface; 42. Inner filling part; 421. Exhaust channel; 422. Connecting hole; 423. First support bar; 43. Limiting bar; 431. Docking slot; 5. Outer filling bar; 51. Docking bar; 52. Heat storage chamber; 53. Avoidance arc groove; 54. Inlet / outlet channel; 55. Second support bar; 6. Restraining ring. Detailed Implementation

[0028] The following combination Figures 1-7 This application will be described in further detail.

[0029] Example 1: This application discloses a highly stable anti-interference optical cable.

[0030] Reference Figure 1 , Figure 2 A highly stable anti-interference optical cable includes an outer sheath 1, an isolation sheath 2, and fiber bundles 3. The outer sheath 1 includes a reinforcing layer 11, a buffer layer 12, and a protective layer 13. The buffer layer 12 is sleeved on the outer peripheral wall of the reinforcing layer 11, and the protective layer 13 is sleeved on the outer peripheral wall of the buffer layer 12. In this embodiment, the reinforcing layer 11 can be a woven mesh fiber layer, the buffer layer 12 can be a synthetic rubber layer, and the protective layer 13 can be a fluoropolymer layer.

[0031] The isolation sleeve 2 is installed inside the reinforcement layer 11, and the isolation sleeve 2 and the reinforcement layer 11 are coaxially arranged. A temperature regulating component for adjusting the temperature of the optical cable is provided inside the isolation sleeve 2. In this embodiment, the temperature regulating component includes a heating wire 21 and a conductive wire. The heating wire 21 is installed inside the isolation sleeve 2, and the isolation sleeve 2 wraps around the heating wire 21. There can be one or more heating wires 21. Both ends of the heating wire 21 extend along the length of the isolation sleeve 2. One end of the heating wire 21 extends out of the isolation sleeve 2 and is electrically connected to one end of the conductive wire (not shown in the figure). The end of the conductive wire away from the heating wire 21 is used to connect an external power supply device (the power supply device can be a power socket, power adapter, battery, or other electrical device capable of providing a stable current).

[0032] The inner diameter of the reinforcing layer 11 is larger than the outer diameter of the isolation sleeve 2. For ease of description, the area between the reinforcing layer 11 and the isolation sleeve 2 is defined as the mounting area 14. Multiple fiber bundles 3 are mounted in the mounting area 14 and arranged axially around the isolation sleeve 2.

[0033] The outer periphery of the isolation sleeve 2 is fitted with a buffer sleeve 4, which may be a thermally conductive silicone sleeve. The outer surface of the buffer sleeve 4 has multiple positioning arc surfaces 41, which are correspondingly arranged with multiple fiber bundles 3. In this embodiment, each fiber bundle 3 includes an inner sheath 31 and an optical fiber 32. The inner sheath 31 is installed in the installation area 14 and may be a thermally conductive silicone sleeve. The two ends of the inner sheath 31 extend along the length direction of the isolation sleeve 2. The outer surface of the inner sheath 31 abuts against the inner surface of the reinforcing layer 11. The positioning arc surfaces 41 of the buffer sleeve 4 of the isolation sleeve 2 are attached to the inner sheath 31 of the corresponding fiber bundle 3. The inner sheath 31 abuts against the isolation sleeve 2 through the positioning arc surfaces 41 of the buffer sleeve 4.

[0034] The optical fiber 32 is installed inside the inner sheath 31. Both ends of the optical fiber 32 extend along the length of the inner sheath 31. The optical fiber 32 can be glass or plastic fiber. In this embodiment, the optical fiber 32 is made of plastic fiber.

[0035] For ease of description, the area of ​​two adjacent fiber bundles 3 close to the isolation sheath 2 is defined as the inner filling area 141, and the area of ​​two adjacent fiber bundles 3 away from the isolation sheath 2 is defined as the outer filling area 142. An inner filling part 42 is formed between two adjacent positioning arc surfaces 41, and the number of inner filling parts 42 corresponds to the number of inner filling areas 141. Each inner filling part 42 is adapted to fill the corresponding inner filling area 141.

[0036] Multiple outer filler strips 5 are installed in the installation area 14. The number of outer filler strips 5 corresponds to the number of outer filler areas 142, and each outer filler strip 5 is adapted to fill the corresponding outer filler area 142. In this embodiment, the outer filler strips 5 are made of heat-insulating silicone (i.e., ordinary silicone).

[0037] A binding ring 6 is fitted around the outer side of the outer filler strip 5. The binding ring 6 is elastically configured and binds all the fiber bundles 3 and all the outer filler strips 5, so that all the fiber bundles 3, the outer filler rings, and the isolation sheath 2 are initially connected as a whole. The outer peripheral wall of the inner sheath 31 has a relief ring groove 312 for the binding ring 6 to be inserted, and the outer wall of the outer filler strip 5 has a relief arc groove 53 for the binding ring 6 to be inserted. In other embodiments, the outer filler strip 5 and the inner sheath 31 can also be initially fixed by adhesive bonding before the outer sheath 1 is fitted on.

[0038] The implementation principle of Embodiment 1 of this application is as follows: an enhancement layer 11, a buffer layer 12, and a protective layer 13 are sequentially arranged on the outside of the fiber bundle 3 from the inside to the outside to improve the protection effect of the fiber bundle 3. When subjected to external extrusion pressure, the buffer layer 12 and the buffer sleeve 4 can provide a good buffering effect for the fiber bundle 3, thereby improving the extrusion resistance of the optical cable.

[0039] In extremely cold weather, the heating wire 21 is used to heat the isolation sheath 2, and the heat diffuses outward from the isolation sheath 2 to keep the temperature of the fiber bundle 3 within a reasonable range. This reduces the adverse interference to the transmission of the optical cable caused by excessively low temperatures and improves the environmental adaptability of the optical cable. The outer filler strip 5 is made of heat-insulating silicone, and the buffer sleeve 4 is made of heat-conducting silicone. When the heat inside the isolation sheath 2 can dissipate outward through the buffer sleeve 4, the heat diffusion rate in the fiber bundle 3 is greater than that in the outer filler strip 5. This guides the heat to diffuse outward through the fiber bundle 3 as much as possible, greatly improving the temperature regulation effect and heat utilization rate of the fiber bundle 3.

[0040] Example 2: This application discloses a highly stable anti-interference optical cable.

[0041] The difference between the high-stability anti-interference optical cable disclosed in this application and Embodiment 1 is that: Reference Figure 3 , Figure 4 In this embodiment, a limiting strip 43 is provided on the side of the inner filling part 42 away from the isolation sleeve 2. The limiting strip 43 and the inner filling part 42 of the buffer sleeve 4 are integrally formed. The two ends of the limiting strip 43 extend along the length direction of the isolation sleeve 2. Two limiting slots 311 are respectively opened on the outer surface of the inner sleeve 31. The two limiting slots 311 of the inner sleeve 31 are respectively used for the limiting strips 43 of two adjacent inner filling parts 42 to be matched and embedded.

[0042] The implementation principle of Embodiment 2 of this application is as follows: A limiting strip 43 is provided on the side of the inner filling part 42 away from the isolation sleeve 2, so that the limiting strip 43 is embedded between the inner sleeves 31 of two adjacent fiber bundles 3, thereby forming a buffer between the two adjacent fiber bundles 3 and improving the compression resistance of the overall structure. In addition, the two limiting slots 311 of the fiber bundle 3 are respectively used for the limiting strips 43 of the two adjacent inner filling parts 42 to be matched and embedded, thereby achieving a preliminary fixing effect on the fiber bundle 3, keeping the inner sleeve 31 of the fiber bundle 3 in contact with the positioning arc surface 41, and improving the stability of the overall structure.

[0043] Example 3: This application discloses a highly stable anti-interference optical cable.

[0044] The difference between the high-stability anti-interference optical cable disclosed in this application embodiment and Embodiment 2 is as follows: Reference Figure 5 In this embodiment, a docking strip 51 is provided on the side of the outer filling strip 5 near the isolation sleeve 2. The docking strip 51 and the outer filling strip 5 are integrally formed. The two ends of the docking strip 51 extend along the length direction of the outer filling strip 5. The surface of the limiting strip 43 is provided with a docking slot 431 for the docking strip 51 to be inserted. The outer filling strip 5 can be detachably installed in the docking slot 431 of the limiting strip 43 through the docking strip 51 (that is, in this embodiment, the restraining ring 6 may not be provided).

[0045] The implementation principle of Embodiment 3 of this application is as follows: When installing the outer filler strip 5, the outer filler strip 5 is placed in the area away from the isolation sleeve 2 between two adjacent fiber bundles 3. A certain pressure is applied to the outer filler strip 5, causing the mating strip 51 of the outer filler strip 5 to engage with the mating groove 431 of the limiting strip 43, thereby connecting the inner filler part 42 and the outer filler strip 5 into a whole. The combination of the inner filler part 42 and the outer filler strip 5 fixes the fiber bundle 3 to the outside of the buffer sleeve 4, connecting the fiber bundle 3, the outer filler strip 5, and the buffer sleeve 4 into a whole, improving the stability of the overall structure.

[0046] Example 4: This application discloses a highly stable anti-interference optical cable.

[0047] The difference between the high-stability anti-interference optical cable disclosed in this application embodiment and Embodiment 3 is that: Reference Figure 6In this embodiment, an exhaust channel 421 is provided inside the inner filling part 42. The number of exhaust channels 421 corresponds to the number of limiting strips 43. Both ends of the exhaust channel 421 extend along the length direction of the buffer sleeve 4. Each exhaust channel 421 has a connecting hole 422 on its inner wall. Multiple connecting holes 422 are arranged at intervals along the length direction of the exhaust channel 421. The connecting holes 422 of the exhaust channel 421 connect to the docking slots 431 of the corresponding limiting strips 43. Multiple first support strips 423 are installed inside the exhaust channel 421. The first support strips 423 are elastically arranged, and both ends of the first support strips 423 are fixedly connected to the inner wall of the exhaust channel 421.

[0048] The implementation principle of Embodiment 4 of this application is as follows: The arrangement of the exhaust channel 421 and the connecting hole 422 allows air in the connecting groove 431 of the outer filler strip 5 to be squeezed into the exhaust channel 421 through the connecting hole 422 during the process of the connecting strip 51 of the outer filler strip 5 being inserted into the connecting groove 431 of the limiting strip 43, thereby reducing the air pressure resistance during the installation of the outer filler strip 5. In addition, the air in the connecting groove 431 is squeezed out through the connecting hole 422, which improves the fit between the connecting strip 51 and the inner wall of the connecting groove 431, and improves the connection stability between the inner filler part 42 and the outer filler strip 5.

[0049] Example 5: This application discloses a highly stable anti-interference optical cable.

[0050] The difference between the high-stability anti-interference optical cable disclosed in this application embodiment and Embodiment 4 is as follows: Reference Figure 7 The outer filling strip 5 has a heat storage cavity 52 inside, and the surface of the connecting strip 51 has an inlet and outlet channel 54 that connects to the heat storage cavity 52. ​​The inlet and outlet channel 54 gradually narrows from the side close to the heat storage cavity 52 to the side away from the heat storage cavity 52. ​​The heat storage cavity 52 is connected to the exhaust channel 421 through the inlet and outlet channel 54.

[0051] Multiple second support bars 55 are installed inside the heat storage chamber 52. The second support bars 55 are elastically arranged, and both ends of the second support bars 55 are fixedly connected to the inner wall of the heat storage chamber 52.

[0052] The implementation principle of Embodiment 5 of this application is as follows: Utilizing the poor thermal conductivity of heat-insulating silicone (compared to heat-conducting silicone), a heat storage cavity 52 is provided in the outer filling strip 5, so that a part of the heat can be retained in the outer filling strip 5. When the heating wire 21 stops heating, the heat retained in the heat storage cavity 52 can be slowly transferred to the buffer sleeve 4 through the inlet and outlet channel 54, and diffuse outward from the fiber bundle 3 along the buffer sleeve 4, so as to reduce the adverse interference caused by the low temperature of the outside to the performance of the optical cable.

[0053] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A highly stable anti-interference optical cable, characterized in that: It includes an outer sheath (1), an isolation sheath (2), and fiber bundles (3). The outer sheath (1) includes a reinforcing layer (11), a buffer layer (12), and a protective layer (13) arranged sequentially from the inside to the outside. The isolation sheath (2) is coaxially arranged within the reinforcing layer (11), and a temperature regulating element is provided inside the isolation sheath (2). An installation area (14) is formed between the reinforcing layer (11) and the isolation sheath (2). Multiple fiber bundles (3) are arranged within the installation area (14) and are arranged around the axial direction of the isolation sheath (2).

2. The high-stability anti-interference optical cable according to claim 1, characterized in that: The temperature regulating component includes an electric heating wire (21) and a conductive wire. The electric heating wire (21) is disposed inside the isolation sheath (2). One end of the conductive wire is electrically connected to the electric heating wire (21), and the other end is used to connect to an external power supply device.

3. The high-stability anti-interference optical cable according to claim 1, characterized in that: The fiber bundle (3) includes an inner sheath (31) and an optical fiber (32). The inner sheath (31) is disposed in the installation area (14). The outer surface of the inner sheath (31) abuts against the reinforcing layer (11) and the isolation sheath (2) respectively. The optical fiber (32) is disposed in the inner sheath (31).

4. The high-stability anti-interference optical cable according to claim 3, characterized in that: The outer peripheral wall of the isolation sleeve (2) is fitted with a buffer sleeve (4). The outer surface of the buffer sleeve (4) has multiple positioning arc surfaces (41). The multiple positioning arc surfaces (41) are correspondingly arranged with multiple fiber bundles (3). Each positioning arc surface (41) is attached to the inner sleeve (31) of the corresponding fiber bundle (3).

5. A highly stable anti-interference optical cable according to claim 4, characterized in that: An inner filling portion (42) is formed between two adjacent positioning arc surfaces (41), and the inner filling portion (42) fills the area of ​​two adjacent fiber bundles (3) near the isolation sheath (2).

6. The high-stability anti-interference optical cable according to claim 5, characterized in that: The inner filling part (42) has a limiting strip (43) on the side away from the isolation sleeve (2). The limiting strip (43) is elastically set. The outer surface of the inner sleeve (31) has two limiting slots (311). The two limiting slots (311) of the inner sleeve (31) are respectively used for the limiting strips (43) of two adjacent inner filling parts (42) to match and embed.

7. A highly stable anti-interference optical cable according to claim 6, characterized in that: An outer filling strip (5) is provided between two adjacent fiber bundles (3), and the outer filling strip (5) fills the area of ​​the two adjacent fiber bundles (3) away from the isolation sheath (2).

8. A highly stable anti-interference optical cable according to claim 7, characterized in that: The outer filling strip (5) has a docking strip (51) on the side near the isolation sleeve (2), and the surface of the limiting strip (43) is provided with a docking slot (431) for the docking strip (51) to be inserted. The outer filling strip (5) can be detachably installed in the docking slot (431) of the limiting strip (43) through the docking strip (51).

9. A highly stable anti-interference optical cable according to claim 8, characterized in that: The inner filling part (42) is provided with an exhaust channel (421). The number of exhaust channels (421) is set in accordance with the number of limiting strips (43). Each exhaust channel (421) has a connecting hole (422) on its inner wall. The connecting hole (422) of the exhaust channel (421) is connected to the docking slot (431) of the corresponding limiting strip (43).

10. A highly stable anti-interference optical cable according to claim 9, characterized in that: The buffer sleeve (4) is made of thermally conductive silicone, and the outer filling strip (5) is made of thermally insulating silicone; a heat storage cavity (52) is provided inside the outer filling strip (5), and the heat storage cavity (52) is connected to the exhaust channel (421).

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