High-tensile skeleton type ribbon optical cable and preparation method thereof

Abstract

The invention belongs to the field of optical communication transmission, and particularly 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 wraps and is attached to the outer portion of the framework type cable core, and the framework type cable core comprises a framework body and a plurality of optical fiber ribbons; a plurality of skeleton grooves are formed in the peripheral side of the skeleton main body; the plurality of optical fiber ribbons are respectively arranged in the corresponding skeleton grooves; the skeleton-type cable core also comprises a water-blocking tape, and the water-blocking tape wraps the optical fiber tape and the skeleton main body. The sheath body comprises an inner sheath layer, a tension enhancement layer and an outer sheath layer which are sequentially arranged from inside to outside. According to the skeleton-type ribbon optical cable, the sheath body is combined with the skeleton-type cable core, so that the whole optical cable has better tensile performance on the premise that the advantages of high optical fiber density, small diameter and weight, no pollution and the like of the existing skeleton-type ribbon optical cable are reserved, and the skeleton-type ribbon optical cable is suitable for use and construction occasions with higher requirements on the tensile force of the optical cable.

Description

Technical Field

[0001] The present application belongs to the field of optical communication transmission, and more specifically, to a high-tensile strength skeleton-type ribbon optical cable and a preparation method thereof. Background Art

[0002] Skeleton-type ribbon optical cables are widely used in metropolitan area networks and access networks because of their high fiber density, small cable diameter and weight, easy construction and installation, no fiber paste and cable paste pollution, and good bending properties. The cable core of traditional skeleton-type ribbon optical cables is usually wrapped with a water-blocking tape, and then covered with an outer sheath to protect the cable core. However, due to the low strength of the outer sheath, the tensile performance of traditional skeleton-type ribbon optical cables is poor, and it is not suitable for use and laying occasions with higher requirements for optical cable tension. In order to improve the overall strength of some optical cables, a metal fiber layer is provided between the outer sheath and the cable core, thereby improving the tensile performance of the optical cable. When the sheath is applied to traditional skeleton-type ribbon optical cables, the metal fiber layer and the water-blocking tape are prone to adhesion. When the optical cable is stripped, the optical fiber ribbon in the cable core is easy to spread, which is not convenient for welding and other operations. In addition, the metal fiber layer exerts a large pressure on the cable core, which is easy to cause damage to the optical fiber ribbon and affect signal transmission. Summary of the invention

[0003] In view of the defects of the prior art, the present application provides a high-tensile strength skeleton-type ribbon optical cable and a preparation method thereof, aiming to solve the problem that the existing skeleton-type ribbon optical cable has poor tensile performance and cannot be used in use and laying occasions with higher requirements for optical cable tension.

[0004] The present application provides a high-tensile strength skeleton-type ribbon optical cable, which specifically includes a skeleton cable core and a sheath body, wherein the sheath body covers and adheres to the outside of the skeleton cable core, wherein: the skeleton cable core includes a skeleton body and a plurality of optical fiber ribbons, a plurality of skeleton grooves extending along the axial direction of the skeleton body are opened on the circumferential side of the skeleton body, and the plurality of optical fiber ribbons are respectively arranged in the corresponding skeleton grooves; the skeleton cable core also includes a water-blocking tape, which covers the outside of the optical fiber ribbon and the skeleton body; the sheath body includes an inner sheath layer, a tension reinforcement layer and an outer sheath layer arranged in sequence from the inside to the outside, and the inner sheath layer is coaxially sleeved on the outside of the water-blocking tape on the skeleton body.

[0005] Through the above technical scheme conceived by the present application, compared with the prior art, the skeleton-type ribbon optical cable of the present application adopts a three-layer structure of an inner sheath layer, a tension enhancement layer and an outer sheath layer to compositely form a sheath body wrapped around the outside of the skeleton cable core, so that the sheath body has good tensile resistance. Through the combination of the sheath body and the skeleton cable core, the skeleton-type ribbon optical cable as a whole can have better tensile resistance while retaining the advantages of the existing skeleton-type ribbon optical cable such as high optical fiber density, small diameter and weight, and no pollution. It is suitable for the use and construction occasions with higher requirements on optical cable tension. At the same time, the inner sheath layer can protect the optical fiber ribbon on the skeleton body to prevent the tension enhancement layer from directly contacting the skeleton body and squeezing the optical fiber ribbon, thereby affecting the signal transmission of the optical fiber ribbon.

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

[0007] By adopting the above technical solution, there is no adhesion between the cross-linked water-blocking tape and the inner sheath layer. When stripping the optical cable, stripping the inner sheath layer will not cause the cross-linked water-blocking tape and the optical fiber ribbon to spread out. The optical fiber ribbon is stably arranged, which is convenient for fusion construction.

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

[0009] By adopting the above technical solution, the glass fiber layer and the aramid layer have better tensile properties, and compared with the metal fiber layer, the glass fiber layer and the aramid layer are lighter in weight, have better adhesion with the inner sheath layer and the outer sheath layer, can reduce the gap between the inner sheath layer and the outer sheath layer, and make the optical cable as a whole have a smaller diameter.

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

[0011] By adopting the above technical solution, the inner sheath layer can protect the optical fiber ribbon to prevent it from being subjected to excessive force, and prevent the tension reinforcement layer from embedding in the skeleton groove to compress the optical fiber ribbon and cause damage to it. The inner sheath layer is set 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 preference, the skeleton cable core further comprises a plurality of rib marks for marking the skeleton grooves, and the plurality of rib marks are arranged on the outer periphery of the skeleton body and extend along the axial direction.

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

[0014] As a further preference, the skeleton cable core further comprises a central reinforcement member, wherein the central reinforcement member is located on the axis of the skeleton body and extends along the axial direction thereof.

[0015] By adopting the above technical solution, the central reinforcement is arranged on the axis of the skeleton body, so that the strength of the skeleton body is higher, thereby improving the overall structural strength of the optical cable, so that the skeleton-type ribbon optical cable of the present application has good tensile performance.

[0016] As a further preference, a first open cable is arranged between the water-blocking tape and the inner sheath layer, a second open cable is arranged between the tension reinforcement layer and the outer sheath layer, and the first open cable and the second open cable are both arranged along the axial direction of the skeleton body.

[0017] By adopting the above technical solution, the second cable and the first cable are pulled in sequence, so that the sheath body can be peeled off from the outside to the inside, so that the skeleton cable core leaks out, thereby facilitating the laying and welding of the optical fiber ribbon in the skeleton groove.

[0018] The present application provides a method for preparing a high tensile strength skeleton type ribbon optical cable, comprising the following steps: S1: Place the optical fiber ribbon in the frame groove on the frame body, and wrap the water-blocking tape around the frame body and the optical fiber ribbon; S2: After the inner sheath layer is extruded outside the skeleton body wrapped with the water blocking tape, cooling is performed; S3: Covering the outer side of the cooled inner jacket layer with a tensile reinforcement layer; S4: After extruding an outer sheath layer on the outside of the tension reinforcement layer, cooling is performed to complete the preparation of the high-tensile skeleton type ribbon optical cable.

[0019] As a further preferred embodiment, in the step S2, before extruding the inner sheath layer, a first open cable is arranged outside the skeleton body wrapped with the water blocking tape.

[0020] By adopting the above technical solution, the first opening cable is located between the water-blocking tape and the inner sheath layer. The inner sheath layer can be easily removed by pulling the first opening cable, which is highly efficient. After the inner sheath layer is removed, the integrity of the water-blocking tape is better, which is convenient for the separation and welding of the optical fiber ribbon.

[0021] As a further preferred embodiment, in the step S4, before extruding the outer sheath layer, a second open cable is arranged outside the tension reinforcement layer.

[0022] By adopting the above technical solution, the second opening cable is located between the tension reinforcement layer and the outer sheath layer. The outer sheath layer can be easily removed by pulling the second opening cable, thereby improving the operation efficiency.

[0023] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art: 1. The sheath body in the skeleton-type ribbon optical cable of the present application is composed of a three-layer structure of an inner sheath layer, a tension-enhancing layer and an outer sheath layer, so that the sheath body has good tensile resistance. The sheath body is coated on the outside of the skeleton cable core. Through the combination of the sheath body and the skeleton cable core, the skeleton-type ribbon optical cable of the present application has better tensile resistance as a whole while retaining the advantages of the existing skeleton-type ribbon optical cable such as high optical fiber density, small diameter and weight, and no pollution. It is suitable for use and construction occasions with higher requirements for optical cable tension, making the applicability of the optical cable better. At the same time, the inner sheath layer can protect the optical fiber ribbon on the skeleton body, and prevent the tension-enhancing layer from directly contacting the skeleton body to squeeze the optical fiber ribbon, thereby affecting the signal transmission of the optical fiber ribbon.

[0024] 2. In this application, a cross-linked water-blocking tape is used to cover the outside of the optical fiber ribbon and the skeleton body. There is no adhesion between the cross-linked water-blocking tape and the inner sheath layer. When the optical cable is stripped, stripping the inner sheath layer will not cause the cross-linked water-blocking tape and the optical fiber ribbon to spread out. The optical fiber ribbon is stably arranged, which is convenient for fusion construction.

[0025] 3. In this application, the inner sheath layer is used to protect the optical fiber ribbon in the skeleton groove to prevent the tension reinforcement layer from being embedded in the skeleton groove and compressing the optical fiber ribbon to cause damage to it. At the same time, the inner sheath layer is set to a suitable thickness range to avoid processing difficulties when it is too thin, and increase the overall diameter and weight of the optical cable when it is too thick. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the skeleton-type ribbon optical cable of the present application; Figure 2 It is a schematic diagram of the tensile force detection of the skeleton-type ribbon optical cable of the present application; Figure 3 This is a schematic diagram of the tension test of a conventional skeleton-type ribbon optical cable.

[0027] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1. Skeleton cable core; 11. Skeleton body; 111. Skeleton groove; 12. Optical fiber ribbon; 13. Water blocking tape; 14. Rib mark; 15. Center reinforcement member; 2. Sheath body; 21. Inner sheath layer; 22. Tension reinforcement layer; 23. Outer sheath layer; 3. First open cable; 4. Second open cable. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] Conventional skeleton-type ribbon optical cables have poor tensile properties and cannot be used in applications and installations that require high cable tension. Based on this working condition, the present application provides a high-tensile-strength skeleton-type ribbon optical cable, which improves the tensile properties of the skeleton-type ribbon optical cable while retaining the advantages of the existing skeleton-type ribbon optical cable, such as high optical fiber density, small diameter and weight, and no pollution.

[0030] Reference Figure 1 A high tensile strength skeleton ribbon optical cable disclosed in the present application comprises 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. In the cross section along the axial direction of the optical cable, the skeleton cable core 1 and the sheath body 2 are both circular.

[0031] Specifically, the skeleton cable core 1 includes a skeleton body 11 and a plurality of optical fiber ribbons 12. A central reinforcement member 15 is fixedly installed on the central axis of the skeleton body 11. The central reinforcement member 15 extends along its axial direction. The strength of the skeleton body 11 is higher through the central reinforcement member 15, thereby improving the overall structural strength of the optical cable. The central reinforcement member 15 can be made of metal or non-metallic materials according to actual needs; a plurality of skeleton grooves 111 extending along its axial direction are equidistantly arranged around the circumference of the skeleton body 11. The cross-section of the skeleton groove 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 rectangular shape. In this embodiment, six optical fiber ribbons 12 and skeleton grooves 111 are set, and six optical fiber ribbons 12 are respectively arranged in corresponding skeleton grooves 111. Each optical fiber ribbon 12 includes a plurality of single optical fibers for transmitting signals. The optical fiber ribbons 12 and the skeleton grooves 111 correspond one to one. The skeleton cable core 1 also includes a plurality of rib marks 14 for marking the skeleton grooves 111. The plurality of rib marks 14 are arranged on the outer periphery of the skeleton body 11 and extend The rib marks 14 extend in the axial direction. In the present application, there are three rib marks 14. It can be seen from the cross section along the axial direction of the skeleton body 11 that the rib mark 14 is located between two adjacent skeleton grooves 111, and in the clockwise direction, there is one rib mark 14 between the two skeleton grooves 111 of the first group, and two rib marks 14 are provided between the two skeleton grooves 111 of the second group. In this embodiment, the placement method of the optical fiber ribbon 12 is as follows: there are three rib marks 14 on the cross section of the skeleton body 11 for marking the relative position on the cross section of the skeleton body 11, and the surface When aligning the end face of the optical cable, the direction from the single rib mark 14 area to the double rib mark 14 area is clockwise (the direction is determined by the shorter arc distance between the single rib mark 14 area and the double rib mark 14 area). The skeleton groove 111 in the middle of the three rib marks 14 is the first groove, and the adjacent skeleton groove 111 in the clockwise direction is the second groove, and so on for the third, fourth, ... grooves. In order to facilitate the identification of the position of the skeleton groove 111, a rib mark 14 is periodically added between every fifth and sixth grooves, and the optical fiber ribbons 12 are laid out in sequence.

[0032] More specifically, the skeleton 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 is coated on 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 on 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 restrain the optical fiber ribbon 12. Since there is no adhesion between the cross-linked water-blocking tape and the sheath body 2, when stripping the optical cable, 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 is convenient for fusion construction.

[0033] Further, the sheath body 2 includes an inner sheath layer 21, a tension reinforcement layer 22 and an outer sheath layer 23 arranged sequentially from the inside to the outside, and the inner sheath layer 21 is coaxially sleeved on the outside of the water blocking tape 13 wrapped on the skeleton body 11, wherein the thickness of the inner sheath layer 21 is 0.4mm-0.5mm, and the thickness of the inner sheath layer 21 in this embodiment is 0.5mm. The inner sheath layer 21 can protect the optical fiber ribbon 12 to prevent it from being subjected to excessive force, and prevent the tension reinforcement layer 22 from being embedded in the skeleton groove 111 to compress the optical fiber ribbon 12 and cause damage to it. The inner sheath layer 21 is set to a suitable thickness range to avoid processing difficulties when it is too thin, and increase 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, which further enhances the compression and tensile properties of the optical cable. Among them, the inner sheath layer 21 and the outer sheath layer 23 are both made of polyethylene material, and in other embodiments, they can also be made of polyvinyl chloride or low-smoke halogen-free material. By adopting a three-layer structure of an inner sheath layer 21, a tension reinforcement layer 22 and an outer sheath layer 23 to compositely form a sheath body 2 that is coated on the outside of the skeleton cable core 1, the sheath body 2 has good tensile resistance. Through the combination of the sheath body 2 and the skeleton cable core 1, the skeleton ribbon optical cable of the present application as a whole has better tensile resistance while retaining the advantages of the existing skeleton ribbon optical cable such as high optical fiber density, small diameter and weight, and no pollution.

[0034] Among them, in this embodiment, the tension-enhancing layer 22 can be a glass fiber layer or an aramid layer. The glass fiber layer and the aramid layer have good tensile properties, and compared with the metal fiber layer provided in the traditional optical cable, the glass fiber layer and the aramid layer are lighter in weight, and have better adhesion with the inner sheath layer 21 and the outer sheath layer 23, and can reduce the gap between the inner sheath layer 21 and the outer sheath layer 23, so that the skeleton-type ribbon optical cable has a smaller diameter as a whole. Since the cost of aramid is higher than that of glass fiber, preferably, the tension-enhancing layer 22 of the present application is a glass fiber layer. Specifically, the glass fiber layer uses 600tex glass fiber, the 600tex glass fiber has a width of 2mm and a thickness of 0.2mm, the glass fiber covers the surface of the inner sheath layer 21, and the thickness of the glass fiber layer is 0.2mm.

[0035] Furthermore, when the optical cable is laid, in order to facilitate the removal of the sheath body 2, a first open cable 3 is provided between the water blocking tape 13 and the inner sheath layer 21. The first open cable 3 is a 1670text polyester yarn open cable. When used, the inner sheath layer 21 can be easily removed while maintaining the integrity of the water blocking tape 13, which is convenient for the separation and welding of the optical fiber ribbon 12; two second open cables 4 are provided between the tension reinforcement layer 22 and the outer sheath layer 23, and the two second open cables 4 are symmetrical 180 degrees. Arranged on both sides of the skeleton cable core 1, the second open cable 4 is a 3000D polyester open cable, which can facilitate the stripping of the outer sheath layer 23; the first open cable 3 and the second open cable 4 are arranged along the axial direction of the skeleton body 11, and the second open cable 4 and the first open cable 3 are pulled in turn, so that the sheath body 2 can be stripped from the outside to the inside, allowing the skeleton cable core 1 to leak out, and then by removing the cross-linked water-blocking tape, it is convenient to lay and weld the optical fiber ribbon 12 in the skeleton groove 111.

[0036] The above-mentioned high tensile skeleton ribbon optical cable, while retaining the advantages of high fiber density, small diameter and weight, and no pollution of skeleton ribbon optical cable, is convenient for welding construction and other operations, and is suitable for use and laying occasions with higher requirements for optical cable tension. Compared with conventional skeleton ribbon optical cable (GYDGA-XXX), the high tensile skeleton ribbon optical cable (GYDGY63-XXX) of this application has a more compact structure, a smaller cable diameter, a lighter weight, and significantly better tensile performance of the cable.

[0037] The following is a tensile comparison test of 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 "tensile" test method. The diameter of the GYDGY63-144B1.3 optical cable is 13.6mm, and the net weight of the cable is 145KG / KM; the diameter of the GYDGA-144B1.3 optical cable is 14.1mm, and the net weight of the cable is 172KG / KM. Test conditions: a chuck diameter of not less than 30 times the outer diameter of the optical cable is used; the length of the test optical cable is not less than 50 meters; the tensile rate is 10mm / minute; the maximum tension time is maintained for not less than 1 minute, and 4 samples are taken for each test object.

[0038] Test results such as Figure 2 , Figure 3As shown in Table 1, GYDGY63-144B1.3 optical cable: the optical fiber strain (the ratio of the longitudinal change length of the optical fiber tested length to the tested length) is about 0.005% when the short-term tension is 500N, the optical fiber strain is about 0.012% when the short-term tension is 1000N, the optical fiber strain is about 0.018% when the short-term tension is 1500N, and the optical fiber strain is about 0.034% when the short-term tension is 2500N. GYDGA-144B1.3 optical cable: the optical fiber strain is about 0.022% when the short-term tension is 500N, the optical fiber strain is about 0.047% when the short-term tension is 1000N, and the optical fiber strain is about 0.081% when the short-term tension is 1500N (2500N exceeds the structural safety range and is not tested).

[0039] Table 1 Test results

[0040] According to the comparison of the above test results, the GYDGY63-144B1.3 optical cable designed in this application has a smaller strain under the same short-term tension when the optical cable diameter is smaller. It can be seen that the skeleton-type ribbon optical cable designed in this application has greatly improved tensile performance compared with the existing conventional skeleton-type ribbon optical cable.

[0041] The present application also discloses a method for preparing a high tensile strength skeleton type ribbon optical cable, comprising the following steps: S1: Place a plurality of optical fiber ribbons 12 in the skeleton groove 111 on the skeleton body 11 in sequence according to the above-mentioned method for placing the optical fiber ribbons 12, wrap a water-blocking tape 13 around the outside of the skeleton body 11 and the optical fiber ribbons 12, and the water-blocking tape 13 is a cross-linked water-blocking tape. The skeleton body 11 and the optical fiber ribbons 12 are constrained and protected by the cross-linked water-blocking tape.

[0042] S2: After the polyethylene inner sheath layer 21 is extruded on the outside of the skeleton body 11 wrapped with the cross-linked water-blocking tape, the temperature is cooled. Specifically, the polyethylene inner sheath layer 21 has a thickness of 0.4mm-0.5mm and is extruded using a tube drawing mold. The processing temperature of the extruder is: 160 / 180 / 200 / 200 / 200 / 200 / 200 / 200 / 200°C. If the processing temperature is too low, the polyethylene material will have poor fluidity and uneven molding. If the processing temperature is too high, carbonized material will accumulate and cause material stripping. A negative pressure pump is also required for processing this layer of polyethylene sheath, and it needs to be adjusted. The negative pressure value is 0.004-0.005Mpa. Too little negative pressure will cause the extrusion molding to be uneven, and too much negative pressure will cause obvious surface marks and easy material stripping. Before extruding the inner sheath layer 21, a 1670text polyester yarn first open cable 3 is arranged on the outside of the skeleton body 11 wrapped with the water-blocking tape 13 along the axial extension direction of the optical cable, so that the first open cable 3 is located between the water-blocking tape 13 and the inner sheath layer 21. The use of the polyester yarn first open cable 3 can easily remove the inner sheath layer 21 and maintain the integrity of the water-blocking tape 13, which facilitates the separation and welding of the optical fiber ribbon 12.

[0043] S3: Wrap the tension reinforcement layer 22 on the outside of the cooled inner sheath layer 21; wrap glass fiber around the polyethylene inner sheath layer 21, and the glass fiber covers the entire 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 splint to prevent the line from collapsing. The glass fiber pay-off tension is 4N and the winding pitch is 400mm. Too large a winding pitch will cause uneven distribution of the glass fiber and bending of the optical cable. Too small a winding pitch will cause the glass fiber to fail to provide tensile support in time when the optical cable is subjected to tension.

[0044] S4: After the outer sheath layer 23 is extruded on the outside of the tension reinforcement layer 22, the temperature is cooled down. The polyethylene outer sheath layer 23 has a thickness of 1.2mm-1.5mm and is extruded by an extrusion mold. The use of an extrusion mold can make the glass fiber layer tighter and the surface of the optical cable more rounded. Before extruding the outer sheath layer 23, two 3000D polyester second open cables 4 are arranged symmetrically 180 degrees on the outside of the tension reinforcement layer 22 along the axial extension direction of the optical cable, so that the second open cables 4 are located between the tension reinforcement layer 22 and the outer sheath layer 23. The core of the extrusion mold has two 180-degree symmetrical small holes, and the open cables pass through the core small holes to ensure that the two open cables remain 180 degrees symmetrical during processing. After the outer sheath layer 23 is cooled, the preparation of the high-tensile skeleton-type ribbon optical cable is completed.

[0045] It should be understood that expressions such as "include" and "may include" 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 "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.

[0046] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A high tensile strength skeleton type ribbon optical cable, characterized in that: It comprises a skeleton cable core (1) and a sheath body (2), wherein the sheath body (2) covers and adheres to the outside of the skeleton cable core (1), wherein: The skeleton cable core (1) comprises a skeleton body (11) and a plurality of optical fiber ribbons (12); a plurality of skeleton grooves (111) extending along the axial direction of the skeleton body (11) are provided on the circumferential side thereof, and the plurality of optical fiber ribbons (12) are respectively arranged in the corresponding skeleton grooves (111); the skeleton cable core (1) further comprises a water blocking tape (13), and the water blocking tape (13) is coated on the outside of the optical fiber ribbon (12) and the skeleton body (11); The sheath body (2) comprises an inner sheath layer (21), a tension reinforcement layer (22) and an outer sheath layer (23) which are arranged in sequence from the inside to the outside, and the inner sheath layer (21) is coaxially sleeved on the outside of the water blocking tape (13).

2. A high tensile strength skeleton type ribbon optical cable as claimed in claim 1, characterized in that: The water-blocking tape (13) is a cross-linked water-blocking tape.

3. A high tensile strength skeleton type ribbon optical cable as claimed in claim 1, characterized in that: The tension-enhancing layer (22) is a glass fiber layer or an aramid layer.

4. A high tensile strength skeleton type ribbon optical cable as claimed in claim 1, characterized in that: The thickness of the inner sheath layer (21) is 0.4 mm-0.5 mm.

5. A high tensile strength skeleton type ribbon optical cable as claimed in claim 1, characterized in that: The skeleton cable core (1) further comprises a plurality of rib marks (14) for marking the skeleton grooves (111); the plurality of rib marks (14) are arranged on the outer periphery of the skeleton body (11) and extend along the axial direction.

6. A high tensile strength skeleton type ribbon optical cable as claimed in claim 1, characterized in that: The skeleton cable core (1) further comprises a central reinforcement member (15), wherein the central reinforcement member (15) is located on the axis of the skeleton body (11) and extends along the axis direction thereof.

7. A high tensile strength skeleton type ribbon optical cable according to any one of claims 1 to 6, characterized in that: A first open cable (3) is arranged between the water-blocking tape (13) and the inner sheath layer (21), and a second open cable (4) is arranged between the tension reinforcement layer (22) and the outer sheath layer (23), and the first open cable (3) and the second open cable (4) are both arranged along the axial direction of the skeleton body (11).

8. A method for preparing a high tensile strength skeleton type ribbon optical cable according to any one of claims 1 to 7, characterized in that: The steps include: S1: placing the optical fiber ribbon (12) in the frame groove (111) on the frame body (11), and wrapping the water blocking tape (13) around the frame body (11) and the optical fiber ribbon (12); S2: After extruding the inner sheath layer (21) on the outside of the skeleton body (11) wrapped with the water blocking tape (13), cooling is performed; S3: Covering the outer portion of the cooled inner jacket layer (21) with a tensile reinforcement layer (22); S4: After extruding the outer sheath layer (23) outside the tension reinforcement layer (22), cooling is performed to complete the preparation of the high tensile strength skeleton type ribbon optical cable.

9. The preparation method according to claim 8, characterized in that: In step S2, before extruding the inner sheath layer (21), a first open cable (3) is arranged outside the skeleton body (11) wrapped with the water blocking tape (13).

10. The preparation method according to claim 8, characterized in that: In step S4, before extruding the outer sheath layer (23), a second open cable (4) is arranged outside the tension reinforcement layer (22).

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