All-dielectric self-supporting aerial optical cable

Abstract

The invention relates to an all-dielectric self-supporting aerial optical cable which comprises a cable core, an inner sheath, a non-metal reinforcing layer and an outer sheath which are sequentially arranged from inside to outside. The cable core comprises a plurality of micro beam tubes which are twisted into a whole; a rigid non-metal reinforcing piece is embedded in the inner sheath; the non-metal reinforcing layer is twisted on the periphery of the inner sheath; and the outer sheath is coated on the non-metal reinforcing layer. According to the optical cable provided by the invention, under the clamping of the fitting, the clamping force borne by the outer sheath can be directly conducted to the non-metal reinforcing layer between the inner sheath and the outer sheath, and then the non-metal reinforcing layer transmits the clamping force to the rigid non-metal reinforcing piece through the inner sheath, so that the effective transmission of the clamping force is realized; therefore, the rigid non-metal reinforcing member can fully play a tensile role, so that the optical cable provided by the embodiment of the invention can be applied to small-span and relatively mild meteorological conditions, and also can be applied to medium-and-long-span and extreme meteorological conditions.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber cables, and in particular to an all-dielectric self-supporting overhead optical cable. Background Art

[0002] All-dielectric self-supporting aerial optical cable, due to its all-dielectric and self-supporting advantages, can be directly laid using existing poles. Compared with pipeline and direct burial construction methods, the construction cost of this type of optical cable is low and the construction is convenient.

[0003] The all-dielectric self-supporting optical cable with micro-beam tube as the optical unit has the characteristics of small outer diameter and light weight due to the compact structure and small size of the micro-beam tube, which is suitable for overhead applications. At the same time, the micro-beam tube is soft and easy to strip, which greatly facilitates the fiber coiling and fiber fusion operations in the splice box and fiber distribution box.

[0004] On the other hand, the micro beam tube itself also has some shortcomings:

[0005] (1) The wall of the microtube is almost in close contact with the optical fiber inside, and the optical fiber does not have enough space to form excess length inside the microtube.

[0006] (2) The wall of the microbeam tube is thin and soft, and its ability to resist external mechanical damage is weak.

[0007] Self-supporting aerial optical cables need to rely on their own tensile components to withstand long-term stress and the influence of wind and ice loads. Conventional self-supporting aerial optical cables with microtubes as optical units have great application risks in some areas with medium and long spans and frequent extreme weather conditions. The main reason is that self-supporting aerial optical cables usually use pre-twisted wires or wedge-shaped clamping hardware for cable installation and laying. Optical cables with microtubes as optical units have a loose structure inside, and the microtubes are arranged together with the non-metallic reinforcement layer. When using the above-mentioned hardware, it is difficult to fully transmit the clamping force of the sheath to the non-metallic reinforcement layer inside the optical cable. Therefore, this type of optical cable can only be used in small spans and relatively mild weather conditions. Summary of the invention

[0008] The embodiment of the present application provides an all-dielectric self-supporting overhead optical cable to solve the problem in the related art that it is difficult to fully transmit the clamping force on the sheath to the non-metallic reinforcement layer inside the optical cable when using hardware, resulting in the self-supporting overhead optical cable being able to be used only in small spans and relatively mild weather conditions.

[0009] The embodiment of the present application provides an all-dielectric self-supporting overhead optical cable, which includes a cable core, an inner sheath, a non-metallic reinforcement layer and an outer sheath arranged in sequence from the inside to the outside;

[0010] The cable core includes a plurality of micro-bundle tubes twisted into one;

[0011] A rigid non-metallic reinforcement member is embedded in the inner sheath;

[0012] The non-metallic reinforcement layer is twisted on the outer periphery of the inner sheath;

[0013] The outer sheath is coated on the non-metallic reinforcement layer.

[0014] In some embodiments, the material of the non-metallic reinforcement layer includes aramid or glass fiber yarn, and the aramid or glass fiber yarn is twisted on the outer periphery of the inner sheath in a unidirectional or bidirectional twisting manner.

[0015] In some embodiments, the outer sheath is configured such that the peeling force required to longitudinally peel off a 30 cm length of the outer sheath is not less than 600N.

[0016] In some embodiments, an anti-sticking isolation layer is provided between the inner sheath and the cable core, and the anti-sticking isolation layer is located on the inner wall of the inner sheath.

[0017] In some embodiments, the material of the anti-sticking isolation layer includes one or more of aramid, glass fiber yarn, polyester tape and non-woven fabric.

[0018] In some embodiments, the cross-sectional area of ​​the cable core accounts for 40% to 70% of the cross-sectional area inside the anti-adhesion isolation layer.

[0019] In some embodiments, the twisting pitch H of the non-metallic reinforcement layer satisfies:

[0020] H = D × π × K;

[0021] D is the outer diameter of the inner sheath, K is the twist coefficient, 15≤K≤45.

[0022] In some embodiments, the cable core further includes a water-blocking material, and the water-blocking material is disposed between the micro-tubes.

[0023] In some embodiments, the water-blocking material includes one or more of water-blocking yarn and water-blocking powder.

[0024] In some embodiments, the microtube is made of one of thermoplastic polyester elastomer, thermoplastic elastomer, polyurethane and polyolefin;

[0025] And / or, a water-blocking material is provided in the optical fiber in the micro-bundle tube, and the water-blocking material includes one or more of water-blocking yarn, water-blocking powder and water-blocking fiber paste;

[0026] And / or, the number of optical fibers in the micro-bundle tube is 1 to 24;

[0027] And / or, the number of the micro-tubes is 1 to 48, and the plurality of micro-tubes are arranged in order by SZ twisting or unidirectional twisting, and are loosely bundled by yarn binding;

[0028] And / or, the material of the inner sheath is one of polyethylene and low-smoke halogen-free flame-retardant polyolefin;

[0029] And / or, the material of the rigid non-metallic reinforcement is one of a glass fiber reinforced plastic rod and an aramid reinforced plastic rod;

[0030] and / or, the diameter of the rigid non-metallic reinforcement is 0.5 to 2.5 mm;

[0031] And / or, the number of the rigid non-metallic reinforcement members is an even number and is symmetrically distributed on both sides of the inner sheath;

[0032] And / or, the cross-sectional area of ​​the cable core accounts for 40% to 70% of the cross-sectional area inside the inner sheath.

[0033] The beneficial effects of the technical solution provided by this application include:

[0034] The present application adopts a double-layer sheath structure, and a rigid non-metallic reinforcement member is embedded in the inner sheath. The rigid non-metallic reinforcement member can keep the inner sheath relatively stable in size under the influence of temperature changes and external mechanical forces. The non-metallic reinforcement layer is twisted on the outer wall of the inner sheath, and then tightly covered with a layer of outer sheath, so that the inner sheath, the non-metallic reinforcement layer and the outer sheath form a tightly connected overall structure. Under the clamping of hardware, the clamping force exerted on the outer sheath can be directly transmitted to the non-metallic reinforcement layer between the inner sheath and the outer sheath, and the non-metallic reinforcement layer then transmits the clamping force to the rigid non-metallic reinforcement member through the inner sheath, thereby achieving effective transmission of the clamping force, so that the rigid non-metallic reinforcement member can fully play a tensile role, thereby ensuring that the optical cable provided in the embodiment of the present application can not only be used for small spans and relatively mild weather conditions, but also for medium and long spans and extreme weather conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 Schematic diagram of the all-dielectric self-supporting overhead optical cable provided in an embodiment of the present application.

[0037] In the figure: 1. micro-bundle tube; 2. water-blocking material; 3. anti-sticking isolation layer; 4. rigid non-metallic reinforcement; 5. inner sheath; 6. non-metallic reinforcement layer; 7. outer sheath. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] See also Figure 1 As shown, an embodiment of the present application provides an all-dielectric self-supporting overhead optical cable, which includes a cable core, an inner sheath 5, a non-metallic reinforcement layer 6 and an outer sheath 7 arranged in sequence from the inside to the outside along the radial direction. The cable core in the present application includes a plurality of micro-bundle tubes 1 twisted into one, a rigid non-metallic reinforcement member 4 is embedded in the inner sheath 5, the non-metallic reinforcement layer 6 is twisted on the outer periphery of the inner sheath 5, and the outer sheath 7 is coated on the non-metallic reinforcement layer 6.

[0040] The present application adopts a double-layer sheath structure, and a rigid non-metallic reinforcement member 4 is embedded in the inner sheath 5. The rigid non-metallic reinforcement member 4 can enable the inner sheath 5 to maintain a relatively stable size under the influence of temperature changes and external mechanical forces. The non-metallic reinforcement layer 6 is twisted on the outer wall of the inner sheath 5, and then tightly coated with a layer of outer sheath 7, so that the inner sheath 5, the non-metallic reinforcement layer 6 and the outer sheath 7 form a tightly connected overall structure. Under the clamping of hardware, the clamping force exerted on the outer sheath 7 can be directly transmitted to the non-metallic reinforcement layer 6 between the inner sheath 5 and the outer sheath 7, and the non-metallic reinforcement layer 6 then transmits the clamping force to the rigid non-metallic reinforcement member 4 through the inner sheath 5, thereby achieving effective transmission of the clamping force, so that the rigid non-metallic reinforcement member 4 can fully play a tensile role, thereby ensuring that the optical cable provided in the embodiment of the present application can not only be used for small spans and relatively mild weather conditions, but also for medium and long spans and extreme weather conditions.

[0041] In the present application, the material of the non-metallic reinforcement layer 6 includes aramid or glass fiber yarn, and the aramid or glass fiber yarn is twisted on the outer periphery of the inner sheath 5 in a unidirectional or bidirectional twisting manner.

[0042] The outer sheath 7 is tightly wrapped around the outer periphery of the non-metallic reinforcement layer 6. The material of the outer sheath 7 can be selected from common materials such as polyethylene. The outer sheath 7 must have sufficient covering force so that when it is clamped by hardware, it can transmit the clamping force to the internal non-metallic reinforcement layer 6 and the rigid non-metallic reinforcement 4 inside the inner sheath 5. Therefore, the present application defines the covering condition of the outer sheath 7. Specifically, the outer sheath 7 is configured such that the stripping force required to longitudinally strip the 30 cm length of the outer sheath is not less than 600 N.

[0043] In order to prevent the micro-tube 1 from adhering to the inner wall of the inner sheath 5 and causing the optical cable attenuation problem, see Figure 1 As shown, an anti-sticking isolation layer 3 is provided between the inner sheath 5 and the cable core, and the anti-sticking isolation layer 3 is located on the inner wall of the inner sheath 5 .

[0044] In the present application, the material of the anti-sticking isolation layer 3 includes one or more of aramid, glass fiber yarn, polyester tape and non-woven fabric.

[0045] In the present application, in order to allow the micro-tube 1 to have a certain amount of space for movement, the cross-sectional area of ​​the cable core accounts for 40% to 70% of the cross-sectional area inside the anti-adhesion isolation layer 3 .

[0046] It can be understood that, when the anti-sticking isolation layer 3 is not provided, the ratio of the cross-sectional area of ​​the cable core to the cross-sectional area inside the inner sheath 5 is 40% to 70%.

[0047] Since the present application is designed as a double-layer sheath structure, the clamping force applied by the hardware to the outer sheath 7 needs to pass through the non-metallic reinforcement layer 6 to be transmitted to the inner sheath 5. The material of the non-metallic reinforcement layer 6 is generally aramid or glass fiber yarn, which is relatively soft. During the manufacturing process or use, it may cause force loss or fail to transmit the clamping force on the optical cable to the inner sheath 5, thereby causing the rigid non-metallic reinforcement 4 to be unable to do work, resulting in inconsistent elongation of the inner and outer sheath layers, resulting in stress accumulation and even the pulling off and delamination of the outer sheath 7 of the optical cable, affecting the performance of the optical cable. Therefore, the present application optimizes the twisting pitch of the non-metallic reinforcement layer 6 so that it is tightly wrapped around the outer periphery of the inner sheath 5, thereby achieving effective transmission of force.

[0048] Specifically, the twisting pitch H of the non-metallic reinforcement layer 6 satisfies:

[0049] H = D × π × K;

[0050] D is the outer diameter of the inner sheath 5, K is the twist coefficient, 15≤K≤45.

[0051] The reason why the outer diameter D of the inner sheath 5 is used as the basis to limit the twisting pitch H of the non-metallic reinforcement layer 6 can alleviate the phenomenon of pulling off and delamination of the outer sheath 7 of the optical cable and realize the effective transmission of the force value is:

[0052] The inner sheath 5 is fully rigid as a whole and has little shrinkage due to the support of the rigid non-metallic reinforcement 4. During the outer sheath process, the non-metallic reinforcement layer 6, such as yarn-like elements such as aramid yarn and glass yarn, is coated on the inner sheath 5, and then coated together with the outer sheath 7. During the molding and cooling process, the outer sheath 7 will shrink violently, thereby driving the yarn-like elements to shrink together, resulting in the yarn-like elements not being in a straightened state between the inner sheath 5 and the outer sheath 7. Ultimately, when this part of the yarn is subjected to tension, it must be straightened first and then subjected to force, thereby greatly reducing the tensile strength of the yarn.

[0053] The yarn-like element is wrapped on the inner sheath 5 with strong rigid support with an appropriate twisting pitch, so that a certain friction is generated between the yarn-like element and the inner sheath 5 due to the winding effect, which greatly reduces the influence of the contraction of the outer sheath 7 on the yarn length. If the twisting pitch of the yarn-like element is too large, the winding effect is insufficient and it is difficult to resist the influence of the contraction of the outer sheath 7. If the pitch is too small, the yarn is too long due to the dense winding, and it is difficult to fully play the tensile effect.

[0054] Defining an appropriate twisting pitch can ensure that the yarn length is closest to the optical cable length, thereby fully exerting the tensile strength of the reinforcement element.

[0055] A large number of tests have shown that by limiting the twisting pitch H of the non-metallic reinforcement layer 6 as described above, effective transmission of force can be achieved.

[0056] See also Figure 1 As shown, in the present application, the cable core further comprises a water-blocking material 2, and the water-blocking material 2 is arranged between the micro-tubes 1. The water-blocking material 2 comprises one or more of water-blocking yarn and water-blocking powder.

[0057] In some preferred embodiments, the microtube 1 is made of one of thermoplastic polyester elastomer, thermoplastic elastomer, polyurethane and polyolefin.

[0058] In some preferred embodiments, a water-blocking material 2 is provided in the optical fiber in the micro-tube 1, and the water-blocking material 2 includes one or more of water-blocking yarn, water-blocking powder and water-blocking fiber paste.

[0059] In some preferred embodiments, the number of optical fibers in the micro-bundle tube 1 is 1 to 24.

[0060] In some preferred embodiments, the number of the micro-bundle tubes 1 is 1 to 48, and the plurality of micro-bundle tubes 1 are arranged in order by SZ twisting or unidirectional twisting, and are loosely bundled by yarn binding.

[0061] In some preferred embodiments, the inner sheath 5 is made of polyethylene or low-smoke halogen-free flame-retardant polyolefin.

[0062] In some preferred embodiments, the rigid non-metallic reinforcement member 4 is made of a glass fiber reinforced plastic rod or an aramid reinforced plastic rod.

[0063] In some preferred embodiments, the diameter of the rigid non-metallic reinforcement 4 is 0.5-2.5 mm.

[0064] In some preferred embodiments, the number of the rigid non-metallic reinforcement members 4 is an even number, such as two, four, etc., and they are symmetrically distributed on both sides of the inner sheath 5 .

[0065] Embodiment 1

[0066] A full-dielectric self-supporting overhead optical cable comprises a micro-bundle tube 1, a water-blocking material 2, an anti-adhesion isolation layer 3, an inner sheath 5, a non-metallic reinforcement layer 6 and an outer sheath 7.

[0067] The water-blocking material 2 is made of water-blocking yarn, the anti-sticking isolation layer 3 is made of water-blocking tape, and the non-metallic reinforcement layer 6 is made of aramid.

[0068] The optical cable structure can be applied to the 150m span condition, which is more than double the span of the traditional micro-beam tube with a span of 70m.

[0069] There are 24 micro-tubes 1, each of which contains 12 optical fibers, and the gaps between the optical fibers in the micro-tubes are filled with fiber paste. The 24 micro-tubes 1 are twisted unidirectionally to form a bundle. The water-blocking material 2 is filled between the micro-tubes.

[0070] The anti-adhesion isolation layer 3 longitudinally surrounds the bundled micro-tubes 1 and the water-blocking material 2. The cross-sectional area of ​​the circle surrounded by the anti-adhesion isolation layer 3 is twice the sum of the cross-sectional areas of the micro-tubes 1 and the water-blocking material 2.

[0071] The inner sheath 5 covers the water-blocking tape, and GFRP is embedded inside the inner sheath. The diameter of GFRP is 1.6mm, and there are 4 GFRPs, which are divided into 2 groups and symmetrically placed in the inner sheath. To ensure that GFRP can fully play a role when the optical cable is subjected to force, the minimum thickness of the sheath around GFRP is 0.3mm. Compared with 2 2.0mm GFRPs, 4 1.6mm GFRPs can set a smaller outer diameter of the optical cable, and can bear more force and obtain better tensile performance.

[0072] A part of the aramid is wrapped around the inner sheath 5 by twisting it in a clockwise unidirectional manner, and another part of the aramid is wrapped around the inner sheath 5 by twisting it in a counterclockwise unidirectional manner, thereby forming a non-metallic reinforcement layer 6.

[0073] The outer sheath 7 is tightly extruded on the outside of the non-metallic reinforcement layer 6 by an extrusion process. In order to ensure that the aramid and the inner sheath GFRP can be fully stressed when the optical cable is suspended, it is necessary to test the outer sheath stripping force to verify whether the extrusion process can make the outer sheath tightly cover the aramid. Usually, the outer sheath stripping force of 30cm length is at least 600N.

[0074] Embodiment 2

[0075] A full-dielectric self-supporting overhead optical cable comprises a micro-bundle tube 1, a water-blocking material 2, an anti-adhesion isolation layer 3, an inner sheath 5, a non-metallic reinforcement layer 6 and an outer sheath 7.

[0076] The water-blocking material 2 is made of water-blocking yarn, the anti-sticking isolation layer 3 is made of water-blocking tape, and the non-metallic reinforcement layer 6 is made of aramid.

[0077] There are 24 micro-tubes 1, each of which contains 12 optical fibers, and the gaps between the optical fibers in the micro-tubes are filled with fiber paste. The 24 micro-tubes 1 are twisted unidirectionally to form a bundle. The water-blocking material 2 is filled between the micro-tubes.

[0078] The anti-adhesion isolation layer 3 longitudinally surrounds the bundled micro-tubes 1 and the water-blocking material 2. The cross-sectional area of ​​the circle surrounded by the anti-adhesion isolation layer 3 is twice the sum of the cross-sectional areas of the micro-tubes 1 and the water-blocking material 2.

[0079] The inner sheath 5 is coated with the above-mentioned water-blocking tape. The outer diameter D of the inner sheath 5 is 12mm, 15≤K≤45, and the calculated value is 565mm≤H≤1696mm. GFRP is embedded inside the inner sheath. The diameter of GFRP is 1.6mm. There are 4 GFRPs, which are divided into 2 groups and symmetrically placed in the inner sheath. In order to ensure that GFRP can fully play a role when the optical cable is under stress, the minimum thickness of the sheath around GFRP is 0.3mm. A part of the aramid is coated on the inner sheath 5 by clockwise unidirectional twisting, and the other part of the aramid is coated on the inner sheath 5 by counterclockwise unidirectional twisting, thereby forming a non-metallic reinforcement layer 6. The outer sheath 7 is tightly extruded on the outside of the non-metallic reinforcement layer 6 through an extrusion process.

[0080] Based on the above-mentioned second embodiment, the twisting pitch H of the non-metallic reinforcement layer 6 is adjusted to form the five cases shown in the following Table 1:

[0081] Table 1

[0082]

[0083] Method for measuring excess aramid length: Take a 5m long optical cable, remove the outer sheath, and measure the aramid length accurately to mm. According to the formula: excess aramid length (‰) = aramid length (mm) / 5000 (mm) * 1000.

[0084] The tensile test is carried out in accordance with the method E1 tensile performance test of GB / T 7424.21 "General Specification for Optical Cables Part 21: Basic Test Methods for Optical Cables - Mechanical Performance Test Methods", and the strain value of the optical fiber is measured under a tensile force of 3000N.

[0085] From the five cases in Table 1 above, it can be seen that when the twisting pitch H of the non-metallic reinforcement layer 6 satisfies: H=D×π×K, 15≤K≤45, the aramid excess length and optical fiber strain effects are the best, while for conditions below or above this condition, the above performance test results deteriorate.

[0086] It can be seen that by limiting the twist pitch H of the non-metallic reinforcement layer 6, effective transmission of force can be achieved.

[0087] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0088] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0089] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An all-dielectric self-supporting aerial optical cable, characterized in that: It comprises a cable core, an inner sheath (5), a non-metallic reinforcement layer (6) and an outer sheath (7) which are arranged in sequence from the inside to the outside; The cable core comprises a plurality of micro-tubes (1) twisted into one; The inner sheath (5) is embedded with a rigid non-metallic reinforcement member (4); The non-metallic reinforcement layer (6) is twisted on the outer periphery of the inner sheath (5); The outer sheath (7) is coated on the non-metallic reinforcement layer (6).

2. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: The material of the non-metallic reinforcement layer (6) includes aramid or glass fiber yarn, and the aramid or glass fiber yarn is twisted on the outer periphery of the inner sheath (5) in a unidirectional or bidirectional twisting manner.

3. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: The outer sheath (7) is configured such that the stripping force required to longitudinally strip the outer sheath (7) with a length of 30 cm is not less than 600N.

4. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: An anti-sticking isolation layer (3) is provided between the inner sheath (5) and the cable core, and the anti-sticking isolation layer (3) is located on the inner wall of the inner sheath (5).

5. The all-dielectric self-supporting aerial optical cable according to claim 4, characterized in that: The material of the anti-sticking isolation layer (3) includes one or more of aramid, glass fiber yarn, polyester tape and non-woven fabric.

6. The all-dielectric self-supporting aerial optical cable according to claim 4, characterized in that: The proportion of the cross-sectional area of ​​the cable core to the cross-sectional area inside the anti-adhesion isolation layer (3) is 40% to 70%.

7. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: The twisting pitch H of the non-metallic reinforcement layer (6) satisfies: H = D × π × K; D is the outer diameter of the inner sheath (5), K is the twist coefficient, 15≤K≤45.

8. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: The cable core further comprises a water-blocking material (2), and the water-blocking material (2) is arranged between the micro-bundle tubes (1).

9. The all-dielectric self-supporting aerial optical cable according to claim 8, characterized in that: The water-blocking material (2) comprises one or more of water-blocking yarn and water-blocking powder.

10. The all-dielectric self-supporting aerial optical cable according to claim 1, characterized in that: The material of the micro-bundle tube (1) is one of thermoplastic polyester elastomer, thermoplastic elastomer, polyurethane and polyolefin; And / or, a water-blocking material (2) is arranged in the optical fiber in the micro-bundle (1), and the water-blocking material (2) comprises one or more of water-blocking yarn, water-blocking powder and water-blocking fiber paste; And / or, the number of optical fibers in the micro-bundle tube (1) is 1 to 24; And / or, the number of the micro-bundle tubes (1) is 1 to 48, and the plurality of micro-bundle tubes (1) are arranged in order by SZ twisting or unidirectional twisting, and are loosely bundled by yarn binding; And / or, the material of the inner sheath (5) is one of polyethylene and low-smoke halogen-free flame-retardant polyolefin; And / or, the material of the rigid non-metallic reinforcement (4) is one of a glass fiber reinforced plastic rod and an aramid reinforced plastic rod; and / or, the diameter of the rigid non-metallic reinforcement (4) is 0.5 to 2.5 mm; And / or, the number of the rigid non-metallic reinforcement members (4) is an even number and is symmetrically distributed on both sides of the inner sheath (5); And / or, the ratio of the cross-sectional area of ​​the cable core to the cross-sectional area inside the inner sheath (5) is 40% to 70%.

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