A high tensile strength skeleton type ribbon optical cable and a method for manufacturing the same

Abstract

The application belongs to the field of optical communication transmission, and specifically discloses a high-tensile strength framework type ribbon optical cable and a preparation method thereof. The high-tensile strength framework type ribbon optical cable comprises a framework type cable core and a sheath body, the sheath body is wrapped and attached to the outside of the framework type cable core, the framework type cable core comprises a framework main body and a plurality of optical fiber ribbons, a plurality of framework grooves are arranged on the circumferential side of the framework main body, and the plurality of optical fiber ribbons are arranged in the corresponding framework grooves; the framework type cable core further comprises a water-blocking belt, the water-blocking belt is wrapped on the outside of the optical fiber ribbons and the framework main body; and the sheath body comprises an inner sheath layer, a tensile strength reinforcing layer and an outer sheath layer arranged in sequence from inside to outside. In the framework type ribbon optical cable, the combination of the sheath body and the framework type cable core enables the optical cable as a whole to have better tensile strength on the premise of retaining the high optical fiber density, small diameter and weight, no pollution and other advantages of the existing framework type ribbon optical cable, and is suitable for use and construction occasions with higher requirements for optical cable tensile strength.

Description

Technical Field

[0001] This application belongs to the field of optical communication transmission, and more specifically, relates to a high tensile strength skeleton ribbon optical cable and its preparation method. Background Technology

[0002] Ribbon-type optical fiber cables are widely used in metropolitan area networks (MANs) and access networks due to their advantages such as high fiber density, small cable diameter and weight, convenient construction and installation, no fiber grease or cable grease pollution, and good flexibility. Traditional ribbon-type optical fiber cables typically have a water-blocking tape wrapped around the cable core, and then covered with an outer sheath for protection. However, due to the low strength of the outer sheath, traditional ribbon-type optical fiber cables have poor tensile strength, making them unsuitable for applications and laying situations requiring higher tensile strength. Some optical cables incorporate a metal fiber layer between the outer sheath and the cable core to improve overall strength and tensile performance. However, when this sheath is applied to traditional ribbon-type optical fiber cables, the metal fiber layer and the water-blocking tape are prone to adhesion. During cable stripping, the fiber ribbons in the cable core easily unravel, hindering operations such as splicing. Furthermore, the metal fiber layer exerts significant pressure on the cable core, easily damaging the fiber ribbons and affecting signal transmission. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a high-tensile-strength skeleton ribbon optical cable and its preparation method, aiming to solve the problem that existing skeleton ribbon optical cables have poor tensile strength and cannot be used in applications and laying occasions with higher requirements for optical cable tensile strength.

[0004] This application provides a high tensile strength skeleton-type ribbon optical cable, specifically comprising a skeleton-type cable core and a sheath body. The sheath body covers and adheres to the outside of the skeleton-type cable core. The skeleton-type cable core includes a skeleton body and several optical fiber ribbons. Several skeleton grooves extending along the axial direction are formed on the periphery of the skeleton body, and several optical fiber ribbons are respectively disposed in the corresponding skeleton grooves. The skeleton-type cable core also includes a water-blocking tape, which covers the outside of the optical fiber ribbons and the skeleton body. The sheath body includes an inner sheath layer, a tensile reinforcement layer, and an outer sheath layer arranged sequentially from the inside out. The inner sheath layer is coaxially sleeved on the outside of the water-blocking tape on the skeleton body.

[0005] Compared with the prior art, the skeleton ribbon optical cable of this application adopts a three-layer composite structure of an inner sheath layer, a tensile reinforcement layer, and an outer sheath layer to form a sheath body covering the skeleton cable core. This sheath body has better tensile strength. Through the combination of the sheath body and the skeleton cable core, the skeleton ribbon optical cable can achieve better tensile strength while retaining the advantages of existing skeleton ribbon optical cables such as high fiber density, small diameter and weight, and no pollution. This is beneficial for applications and construction occasions with higher requirements for optical cable tensile strength. At the same time, the inner sheath layer can protect the optical fiber ribbon on the skeleton body, preventing the tensile reinforcement layer from directly contacting the skeleton body and causing compression to the optical fiber ribbon, thereby affecting the signal transmission of the optical fiber ribbon.

[0006] As a further preferred embodiment, the water-blocking tape is a cross-linked water-blocking tape.

[0007] By adopting the above technical solution, the cross-linked water-blocking tape and the inner sheath layer do not stick together. When stripping the optical cable, the cross-linked water-blocking tape and the optical fiber ribbon will not be scattered when the inner sheath layer is stripped. The optical fiber ribbon is set stably, which facilitates the fusion splicing construction.

[0008] As a further preferred embodiment, the tensile reinforcement layer is a glass fiber layer or an aramid layer.

[0009] By adopting the above technical solution, the glass fiber layer and aramid layer have good tensile strength. Compared with the metal fiber layer, the glass fiber layer and aramid layer are lighter and have better adhesion to the inner and outer sheath layers, which can reduce the gap between the inner and outer sheath layers and make the optical cable have a smaller overall diameter.

[0010] As a further preferred embodiment, the thickness of the inner sheath layer is 0.4mm-0.5mm.

[0011] By adopting the above technical solution, the inner sheath layer can protect the optical fiber ribbon, prevent it from being subjected to excessive force, prevent the tensile reinforcement layer from being embedded in the skeleton groove and compressing the optical fiber ribbon, causing damage, and set the inner sheath layer to a suitable thickness range to avoid processing difficulties when it is too thin, and to avoid increasing the overall diameter and weight of the optical cable when it is too thick.

[0012] As a further preferred embodiment, the skeleton-type cable core further includes a plurality of ribs for identifying the skeleton grooves, the plurality of ribs being disposed on the outer periphery of the skeleton body and extending along the axial direction.

[0013] By adopting the above technical solution, each skeleton slot can be accurately distinguished according to the rib markings on the skeleton body, so that the optical fiber ribbon can be accurately installed in the corresponding skeleton slot. When laying the optical fiber, the optical fiber in the corresponding skeleton slot is selected for fusion splicing.

[0014] As a further preferred embodiment, the skeleton-type cable core further includes a central reinforcing member, which is located on the axis of the skeleton body and extends along its axial direction.

[0015] By adopting the above technical solution, the central reinforcing member is set on the axis of the skeleton body, which makes the skeleton body stronger and thus improves the overall structural strength of the optical cable, giving the skeleton ribbon optical cable of this application good tensile performance.

[0016] As a further preferred embodiment, a first open cable is provided between the water-blocking strip and the inner sheath layer, and a second open cable is provided between the tensile reinforcement layer and the outer sheath layer, with both the first and second open cables arranged along the axial direction of the main frame body.

[0017] By adopting the above technical solution, pulling the second opening cable and the first opening cable in sequence can peel off the sheath body from the outside to the inside, exposing the skeleton cable core, which facilitates laying and splicing of the optical fiber strip in the skeleton groove.

[0018] This application provides a method for fabricating a high-tensile-strength skeleton-type ribbon optical cable, comprising the following steps:

[0019] S1: Place the optical fiber ribbon in the skeleton groove on the skeleton body, and wrap the water-blocking tape around the outside of the skeleton body and the optical fiber ribbon.

[0020] S2: Cooling and cooling are performed after the inner sheath layer is extruded onto the outside of the skeleton body wrapped with water-blocking strip.

[0021] S3: A tensile reinforcement layer is wrapped around the outside of the cooled inner sheath layer;

[0022] S4: After extruding the outer sheath layer outside the tensile reinforcement layer, cooling is performed to complete the preparation of the high tensile strength skeleton ribbon optical cable.

[0023] As a further preferred embodiment, in step S2, before extruding the inner sheath layer, a first cable-opening rope is set on the outside of the skeleton body wrapped with water-blocking tape.

[0024] By adopting the above technical solution, the first cable is located between the water-blocking strip and the inner sheath layer. By pulling the first cable, the inner sheath layer can be easily removed with high efficiency. After the inner sheath layer is removed, the integrity of the water-blocking strip is good, which facilitates the separation and splicing of the optical fiber strip.

[0025] As a further preferred embodiment, in step S4, before extruding the outer sheath layer, a second cable is installed outside the tensile reinforcement layer.

[0026] By adopting the above technical solution, the second cable is located between the tensile reinforcement layer and the outer sheath layer. By pulling the second cable, the outer sheath layer can be easily removed, thus improving operational efficiency.

[0027] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages:

[0028] 1. The sheath body of the skeleton ribbon optical cable of this application is composed of a three-layer composite structure of an inner sheath layer, a tensile reinforcement layer, and an outer sheath layer, which gives the sheath body good tensile strength. The sheath body covers the outside of the skeleton cable core. Through the combination of the sheath body and the skeleton cable core, the skeleton ribbon optical cable of this application retains the advantages of existing skeleton ribbon optical cables such as high fiber density, small diameter and weight, and no pollution, while having better tensile strength. It is suitable for use and construction occasions with higher requirements for optical cable tensile strength, making the optical cable more versatile. At the same time, the inner sheath layer can protect the optical fiber ribbon on the skeleton body, preventing the tensile reinforcement layer from directly contacting the skeleton body and causing compression to the optical fiber ribbon, thereby affecting the signal transmission of the optical fiber ribbon.

[0029] 2. In this application, cross-linked water-blocking tape is used to cover the outside of the optical fiber ribbon and the skeleton body. The cross-linked water-blocking tape does not stick to the inner sheath layer. When stripping the optical cable, the cross-linked water-blocking tape and the optical fiber ribbon will not be scattered when the inner sheath layer is peeled off. The optical fiber ribbon is set stably, which facilitates the fusion splicing construction.

[0030] 3. In this application, the fiber ribbon inside the skeleton groove is protected by the inner sheath layer to prevent the tensile reinforcement layer from being embedded in the skeleton groove and compressing the fiber ribbon, causing damage. At the same time, the thickness of the inner sheath layer is set within a suitable range to avoid processing difficulties when it is too thin, and to avoid increasing the overall diameter and weight of the optical cable when it is too thick. Attached Figure Description

[0031] Figure 1 This is a schematic cross-sectional view of the skeleton-type ribbon optical cable of this application;

[0032] Figure 2 This is a schematic diagram of the tensile testing of the skeleton-type ribbon optical cable of this application;

[0033] Figure 3 This is a schematic diagram of the tensile testing of a conventional skeleton-type ribbon optical cable.

[0034] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0035] 1. Skeleton-type cable core; 11. Skeleton body; 111. Skeleton groove; 12. Fiber optic ribbon; 13. Water-blocking ribbon; 14. Rib marker; 15. Central reinforcement; 2. Sheath body; 21. Inner sheath layer; 22. Tensile reinforcement layer; 23. Outer sheath layer; 3. First open cable; 4. Second open cable. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] Conventional skeleton ribbon optical cables have poor tensile strength and cannot be used in applications and laying situations where high tensile strength is required. Based on this condition, this application provides a high tensile strength skeleton ribbon optical cable that improves the tensile strength of the existing skeleton ribbon optical cable while retaining its advantages such as high fiber density, small diameter and weight, and no pollution.

[0038] Reference Figure 1 The high tensile strength skeleton ribbon optical cable disclosed in this application includes a skeleton cable core 1 and a sheath body 2. The sheath body 2 covers and fits the outside of the skeleton cable core 1. The cross-section along the optical cable axis is circular for both the skeleton cable core 1 and the sheath body 2.

[0039] Specifically, the skeleton-type cable core 1 includes a skeleton body 11 and several optical fiber ribbons 12. A central reinforcing member 15 is fixedly installed on the central axis of the skeleton body 11. The central reinforcing member 15 extends along its axial direction, making the skeleton body 11 stronger and thus improving the overall structural strength of the optical cable. The central reinforcing member 15 can be made of metal or non-metal materials according to actual needs. Several skeleton grooves 111 extending along its axial direction are equidistantly opened around the periphery of the skeleton body 11. The cross-section of the skeleton grooves 111 along the axial direction of the optical cable can be set to a suitable shape according to actual needs. In this embodiment, it is set to a rectangle. In this embodiment, there are six optical fiber ribbons 12 and six skeleton grooves 111. The six optical fiber ribbons 12 are respectively set in the corresponding skeleton grooves 111. Each optical fiber ribbon 12 includes several single optical fibers for transmitting signals. The optical fiber ribbons 12 and skeleton grooves 111 correspond one-to-one. The skeleton-type cable core 1 also includes several ribs 14 for identifying the skeleton grooves 111. The several ribs 14 are set on the outer periphery of the skeleton body 11 and extend along its axial direction. Extending along the axial direction, this application provides three rib markers 14. A cross-section along the axial direction of the skeleton body 11 shows that the rib markers 14 are located between two adjacent skeleton slots 111, and in a clockwise direction. In the first group, one rib marker 14 is provided between the two skeleton slots 111, and in the second group, two rib markers 14 are provided between the two skeleton slots 111. In this embodiment, the fiber optic strip 12 is placed as follows: Three rib markers 14 are present on the cross-section of the skeleton body 11 to mark the relative positions on the cross-section of the skeleton body 11. When dealing with the end face of the optical cable, the direction from the single rib marker 14 area to the double rib marker 14 area is clockwise (the direction is determined by the shorter arc distance between the single rib marker 14 area and the double rib marker 14 area). The skeleton slot 111 in the middle of the three rib markers 14 is the first slot, the adjacent skeleton slot 111 in the clockwise direction is the second slot, and so on, which are the third, fourth, and so on. In order to facilitate the identification of the position of the skeleton slot 111, a rib marker 14 is periodically added between every fifth and sixth slot, and the optical fiber strip 12 is laid out in sequence.

[0040] More specifically, the skeleton-type cable core 1 also includes a water-blocking tape 13. Preferably, the water-blocking tape 13 is a cross-linked water-blocking tape. The water-blocking tape 13 covers the outside of the optical fiber ribbon 12 and the skeleton body 11. After the optical fiber ribbon 12 is placed in the skeleton groove 111, the cross-linked water-blocking tape is longitudinally wrapped around the outside of the skeleton body 11. The water-blocking tape 13 can prevent water vapor from penetrating and contacting the optical fiber ribbon 12. At the same time, the cross-linked water-blocking tape can constrain the optical fiber ribbon 12. Since the cross-linked water-blocking tape does not stick to the sheath body 2, when the optical cable is stripped, the cross-linked water-blocking tape and the optical fiber ribbon 12 will not be scattered after the sheath body 2 is stripped. The optical fiber ribbon 12 is stably set in the optical fiber groove, which facilitates the fusion splicing construction.

[0041] Furthermore, the sheath body 2 includes an inner sheath layer 21, a tensile reinforcement layer 22, and an outer sheath layer 23 arranged sequentially from the inside out. The inner sheath layer 21 is coaxially sleeved on the outside of the water-blocking tape 13 wrapped around the skeleton body 11. The thickness of the inner sheath layer 21 is 0.4mm-0.5mm. In this embodiment, the thickness of the inner sheath layer 21 is 0.5mm. The inner sheath layer 21 can protect the optical fiber ribbon 12, preventing it from being subjected to excessive force and preventing the tensile reinforcement layer 22 from being embedded in the skeleton groove 111 and compressing the optical fiber ribbon 12, causing damage. The thickness of the inner sheath layer 21 is set within a suitable range to avoid processing difficulties when it is too thin and to avoid increasing the overall diameter and weight of the optical cable when it is too thick. The thickness of the outer sheath layer 23 is 1.4mm, further enhancing the compressive and tensile strength of the optical cable. Both the inner sheath layer 21 and the outer sheath layer 23 are made of polyethylene material. In other embodiments, they can also be made of polyvinyl chloride or low-smoke halogen-free materials. By employing a three-layer composite structure consisting of an inner sheath layer 21, a tensile reinforcement layer 22, and an outer sheath layer 23 to form the sheath body 2 covering the skeleton-type cable core 1, the sheath body 2 possesses better tensile strength. Through the combination of the sheath body 2 and the skeleton-type cable core 1, the skeleton-type ribbon optical cable of this application retains the advantages of existing skeleton-type ribbon optical cables, such as high fiber density, small diameter and weight, and no pollution, while also having better tensile strength.

[0042] In this embodiment, the tensile reinforcement layer 22 can be made of glass fiber or aramid fiber. Glass fiber and aramid fiber layers have good tensile strength and are lighter than the metal fiber layers used in traditional optical cables. They also have better adhesion to the inner sheath layer 21 and the outer sheath layer 23, reducing the gap between them and resulting in a smaller overall diameter for the skeleton ribbon optical cable. Since aramid fiber is more expensive than glass fiber, the tensile reinforcement layer 22 is preferably made of glass fiber. Specifically, the glass fiber layer uses 600tex glass fiber with a width of 2mm and a thickness of 0.2mm. The glass fiber covers the entire surface of the inner sheath layer 21, and the glass fiber layer has a thickness of 0.2mm.

[0043] Furthermore, during the laying of the optical cable, to facilitate the removal of the sheath body 2, a first cable-opening rope 3 is provided between the water-blocking tape 13 and the inner sheath layer 21. The first cable-opening rope 3 is a 1670-textured polyester yarn cable-opening rope, which allows for easy removal of the inner sheath layer 21 while maintaining the integrity of the water-blocking tape 13, facilitating the separation and splicing of the optical fiber ribbon 12. Two second cable-opening ropes 4 are provided between the tensile reinforcement layer 22 and the outer sheath layer 23, and the two second cable-opening ropes 4 are symmetrically arranged at 180 degrees. The second cable strip 4, made of 3000D polyester, is laid on both sides of the skeleton cable core 1, which facilitates the stripping of the outer sheath layer 23. The first cable strip 3 and the second cable strip 4 are both laid along the axial direction of the skeleton body 11. By pulling the second cable strip 4 and the first cable strip 3 in sequence, the sheath body 2 can be stripped from the outside to the inside, exposing the skeleton cable core 1. Then, by removing the cross-linked water-blocking tape, it is easier to lay the cable and perform fusion splicing on the optical fiber ribbon 12 in the skeleton groove 111.

[0044] The aforementioned high-tensile-strength skeleton ribbon optical cable retains the advantages of high fiber density, small diameter and weight, and no pollution of skeleton ribbon optical cables, while facilitating splicing and other operations, making it suitable for applications and laying occasions with higher requirements for cable tensile strength. Compared to conventional skeleton ribbon optical cables (GYDGA-XXX), the high-tensile-strength skeleton ribbon optical cable (GYDGY63-XXX) of this application has a more compact structure, smaller cable diameter, lighter weight, and significantly better tensile strength.

[0045] The following tensile tests were conducted on the high-tensile-strength skeleton ribbon optical cable (GYDGY63-144B1.3) and the conventional skeleton ribbon optical cable (GYDGA-144B1.3) of this application according to the GB / T 7424.2-E1 "Tension" test method. The GYDGY63-144B1.3 optical cable has a diameter of 13.6 mm and a net weight of 145 kg / km; the GYDGA-144B1.3 optical cable has a diameter of 14.1 mm and a net weight of 172 kg / km. Test conditions: a chuck diameter not less than 30 times the outer diameter of the optical cable was used; the length of the test cable was not less than 50 meters; the tensile rate was 10 mm / min; the maximum tensile force was maintained for not less than 1 minute; and four samples were taken for each test object.

[0046] Test results are as follows Figure 2 , Figure 3As shown in Table 1, for the GYDGY63-144B1.3 optical cable: the fiber strain (the ratio of the longitudinal variation length to the test length of the fiber) is approximately 0.005% at a short-term tension of 500N; approximately 0.012% at a short-term tension of 1000N; approximately 0.018% at a short-term tension of 1500N; and approximately 0.034% at a short-term tension of 2500N. For the GYDGA-144B1.3 optical cable: the fiber strain is approximately 0.022% at a short-term tension of 500N; approximately 0.047% at a short-term tension of 1000N; and 0.081% at a short-term tension of 1500N (2500N exceeds the structural safety range and was not tested).

[0047] Table 1 Test Results

[0048]

[0049] Based on the comparison of the above test results, it can be seen that the GYDGY63-144B1.3 optical cable designed in this application has a smaller optical cable diameter and a smaller strain under the same short-term tension. It can be seen that the tensile performance of the skeleton ribbon optical cable designed in this application is greatly improved compared with the existing conventional skeleton ribbon optical cable.

[0050] This application also discloses a method for preparing a high tensile strength skeleton ribbon optical cable, comprising the following steps:

[0051] S1: Several optical fiber strips 12 are placed sequentially in the skeleton groove 111 on the skeleton body 11 according to the above-described method of placing optical fiber strips 12. Water-blocking tape 13 is wrapped around the outside of the skeleton body 11 and the optical fiber strips 12. The water-blocking tape 13 is a cross-linked water-blocking tape. The cross-linked water-blocking tape constrains and protects the skeleton body 11 and the optical fiber strips 12.

[0052] S2: After extruding the polyethylene inner sheath layer 21 around the skeleton body 11 wrapped with cross-linked water-blocking tape, cooling is performed. Specifically, the polyethylene inner sheath layer 21 has a thickness of 0.4mm-0.5mm and is extruded using a tube drawing die. The extrusion machine processing temperature is 160 / 180 / 200 / 200 / 200 / 200 / 200 / 200 / 200℃. If the processing temperature is too low, the polyethylene material will have poor fluidity and the molding will not be round. If the processing temperature is too high, carbonized material will accumulate and cause material to fall off. A negative pressure pump is also required during the processing of this polyethylene sheath layer. The negative pressure value is 0.004-0.005 MPa. If the negative pressure is too small, the extrusion molding will not be round. If the negative pressure is too large, the surface marks will be obvious and the material will be easy to fall off. Before extruding the inner sheath layer 21, a 1670text polyester yarn first cable opening rope 3 is laid on the outside of the skeleton body 11 wrapped with water-blocking tape 13 along the extension direction of the optical cable axis. The first cable opening rope 3 is located between the water-blocking tape 13 and the inner sheath layer 21. Using the polyester yarn first cable opening rope 3, the inner sheath layer 21 can be easily removed while maintaining the integrity of the water-blocking tape 13, which facilitates the separation and splicing of the optical fiber ribbon 12.

[0053] S3: After cooling, the inner sheath layer 21 is wrapped with a tensile reinforcement layer 22; glass fiber is wrapped around the polyethylene inner sheath layer 21, and the glass fiber is spread all over the inner sheath layer 21. The glass fiber needs to be evenly distributed and the two ends of the glass fiber yarn need to be fixed with a clamp to prevent the cable from collapsing. The tension of the glass fiber is 4N and the winding pitch is 400mm. If the winding pitch is too large, it will cause uneven distribution of glass fiber and bending of the optical cable. If the winding pitch is too small, the glass fiber will not be able to provide tensile support in time when the optical cable is under tension.

[0054] S4: After extruding the outer sheath layer 23 outside the tensile reinforcement layer 22, cooling is performed. The polyethylene outer sheath layer 23 has a thickness of 1.2mm-1.5mm and is formed by extrusion molding using an extrusion mold. Using an extrusion mold can make the glass fiber layer more compact and the surface of the optical cable more rounded. Before extruding the outer sheath layer 23, two symmetrical 3000D polyester second open cable ropes 4 are laid out on the outside of the tensile reinforcement layer 22 along the axial extension direction of the optical cable, so that the second open cable ropes 4 are located between the tensile reinforcement layer 22 and the outer sheath layer 23. The core of the extrusion mold has two symmetrical small holes of 180 degrees. The open cable ropes pass through the small holes of the core, which can ensure that the two open cable ropes maintain 180-degree symmetry during processing. After the outer sheath layer 23 is cooled, the preparation of the high tensile strength skeleton ribbon optical cable is completed.

[0055] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0056] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high tensile strength skeleton-type ribbon optical cable, characterized in that, It includes a skeleton-type cable core (1) and a sheath body (2), wherein the sheath body (2) covers and fits the outside of the skeleton-type cable core (1), wherein: The skeleton-type cable core (1) includes a skeleton body (11) and a plurality of optical fiber strips (12). The skeleton body (11) has a plurality of skeleton grooves (111) extending along its axial direction on its periphery, and the plurality of optical fiber strips (12) are respectively disposed in the corresponding skeleton grooves (111). The skeleton-type cable core (1) also includes a water-blocking strip (13), which covers the outside of the optical fiber strips (12) and the skeleton body (11). The sheath body (2) includes an inner sheath layer (21), a tensile reinforcement layer (22) and an outer sheath layer (23) arranged sequentially from the inside to the outside. The inner sheath layer (21) is coaxially sleeved on the outside of the water-blocking strip (13). Both the inner sheath layer (21) and the outer sheath layer (23) are made of polyethylene material. The water-blocking tape (13) is a cross-linked water-blocking tape, and there is no adhesion between the cross-linked water-blocking tape and the sheath body (2); The tensile reinforcement layer (22) is a glass fiber layer, with glass fibers covering the surface of the inner sheath layer (21), and the thickness of the glass fiber layer is 0.2 mm; The thickness of the inner sheath layer (21) is 0.4mm-0.5mm to prevent the tensile reinforcement layer (22) from being embedded in the skeleton groove (111) and compressing the optical fiber ribbon (12) and causing damage to it; The thickness of the outer sheath layer (23) is 1.2mm-1.5mm; The skeleton cable core (1) also includes a central reinforcing member (15), which is located on the axis of the skeleton body (11) and extends along its axial direction.

2. The high tensile strength skeleton-type ribbon optical cable as described in claim 1, characterized in that, The skeleton cable core (1) also includes a number of ribs (14) for identifying the skeleton groove (111), and the number of ribs (14) are located on the outer periphery of the skeleton body (11) and extend along the axial direction.

3. A high tensile strength skeleton-type ribbon optical cable as described in any one of claims 1-2, characterized in that, A first cable rope (3) is provided between the water-blocking strip (13) and the inner sheath layer (21), and a second cable rope (4) is provided between the tensile reinforcement layer (22) and the outer sheath layer (23). Both the first cable rope (3) and the second cable rope (4) are arranged along the axial direction of the main skeleton (11).

4. A method for preparing a high-tensile-strength skeleton-type ribbon optical cable as described in any one of claims 1-3, characterized in that, The steps include the following: S1: Place the fiber optic strip (12) in the skeleton groove (111) on the skeleton body (11), and wrap the water-blocking tape (13) around the skeleton body (11) and the fiber optic strip (12). S2: Cooling is performed after extruding the inner sheath layer (21) on the outside of the skeleton body (11) wrapped with water-blocking strip (13); S3: A tensile reinforcement layer (22) is wrapped around the outside of the cooled inner sheath layer (21); S4: After extruding the outer sheath layer (23) outside the tensile reinforcement layer (22), cooling is performed to complete the preparation of the high tensile skeleton ribbon optical cable.

5. The preparation method according to claim 4, characterized in that, In step S2, before extruding the inner sheath layer (21), a first cable opening rope (3) is set on the outside of the skeleton body (11) wrapped with water-blocking tape (13).

6. The preparation method according to claim 4, characterized in that, In step S4, before extruding the outer sheath layer (23), a second cable rope (4) is installed outside the tensile reinforcement layer (22).

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