Full-dry ribbon optical cable
By using a fully dry ribbon optical cable, and wrapping the optical fiber with loose tubes and dry water-blocking materials, the problems of construction inconvenience and low optical fiber density caused by grease are solved, achieving a higher optical fiber ratio and structural compactness.
Patent Information
- Application Number
- CN202423149586.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing ribbon optical cables use grease, which is time-consuming, labor-intensive, and environmentally unfriendly. They also have low fiber density and poor structural economy.
It adopts a fully dry design, using loose tubes to wrap ribbon optical fibers and dry water-blocking materials inside and outside the loose tubes, eliminating the need for grease, increasing the proportion of optical fibers, and designing a compact structure.
It improves the ease of construction and the economy of optical cables, reduces environmental pollution, and increases fiber density.
Smart Images
Figure CN223883808U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of optical cable, in particular to a full dry ribbon optical cable. BACKGROUND
[0002] Ribbon optical cable is favored in the application of backbone network due to its large core number, high fiber density and convenient construction. However, ribbon optical cable also has a series of problems. On the one hand, the conventional ribbon cable structure is an oil-filled waterproof structure, and a large amount of ointment is used. The ointment is a chemical substance harmful to the human body. When splicing, the operator has to use a large amount of alcohol and paper towels to wipe off the ointment. Usually, it takes about 1 hour to wipe off the ointment of one cable, which is time-consuming, labor-intensive and material-consuming. Secondly, the traditional ribbon cable is large in size, low in fiber density and low in structural economy. SUMMARY
[0003] The embodiment of the present application provides a full dry ribbon optical cable, which is used to solve the problems of practical ointment of the ribbon optical cable in the prior art, which is time-consuming, labor-intensive and not environmentally friendly, and the technical problem of low fiber density of the ribbon optical cable.
[0004] The embodiment of the present application provides a full dry ribbon optical cable, which is used to solve the problems of practical ointment of the ribbon optical cable in the prior art, which is time-consuming, labor-intensive and not environmentally friendly, and the technical problem of low fiber density of the ribbon optical cable.
[0005] The loose tube is internally provided with a ribbon optical fiber and a first dry water-blocking component, and the volume of the ribbon optical fiber accounts for more than 70% and less than or equal to 95% of the internal space volume of the loose tube;
[0006] The tape is wrapped outside the loose tube, and a second dry water-blocking material is further arranged between the tape and the loose tube;
[0007] The sheath is wrapped outside the tape.
[0008] Further, in the utility model, the loose tube is made of flexible thermoplastic material, and the wall thickness is 0.1mm-0.5mm.
[0009] Further, in the utility model, the material of the loose tube is one or a mixture of several of PVC, TPU, LSZH or TPEE.
[0010] Further, in the utility model, the size of each ribbon optical fiber is 3.0mm-3.3mm in width and 0.30mm-0.36mm in thickness.
[0011] Further, in the utility model, the ribbon optical fiber has a plurality of, and the plurality of ribbon optical fibers are regularly stacked in the thickness direction.
[0012] Further, in the utility model, the ribbon optical fiber has 12, and each ribbon optical fiber includes a 12-core ribbon.
[0013] Further, in the utility model, the first dry water-blocking component and the second dry water-blocking component are water-blocking powder or water-blocking yarn.
[0014] Further, in the utility model, the expansion rate of the first dry water-blocking component is greater than or equal to 70 ml / g / min, and the expansion rate of the second dry water-blocking component is greater than or equal to 65 ml / g / min.
[0015] Further, in the utility model, the anti-tension component is embedded in the sheath sidewall, and the anti-tension component is arranged in an array around the center of the optical cable.
[0016] Further, in the utility model, the outer wall of the sheath is provided with air guide grooves formed by spaced peaks and valleys, and the height difference between the highest point of the peak and the lowest point of the valley is 0.02-1 mm.
[0017] Advantages
[0018] The utility model provides a full dry ribbon optical cable, ribbon optical fiber is wrapped by using the loose tube, and the loose tube is wrapped around the ribbon optical fiber as much as possible, the proportion of optical fiber is improved, and therefore the economy of the structure is improved. In addition, the dry water-blocking material is used in the inner and outer loose tubes, and there is no ointment, which is environment-friendly and is favorable for improving the proportion of optical fiber in the loose tube and greatly improving the convenience of construction. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings constituting a part of the present application are used to provide further understanding of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application and do not constitute improper limitation on the present application. In the drawings:
[0020] Figure 1 is a cross-sectional schematic view of a full dry ribbon optical cable according to an embodiment of the utility model.
[0021] Figure 2 is a cross-sectional schematic view of a full dry ribbon optical cable with air guide grooves according to an embodiment of the utility model.
[0022] In the drawings, the meanings of the reference signs are as follows:
[0023] Sheath 1, wrapping tape 2, loose tube 3, ribbon optical fiber 4, anti-tension component 5, first dry water-blocking component 6, air guide groove 7, and second dry water-blocking component 8. DETAILED DESCRIPTION
[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0025] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated by them must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.
[0026] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] As Figure 1 The cross-sectional view of the full-dry ribbon optical cable is shown in the drawings, which comprises Figure 1 The full-dry ribbon optical cable comprises:
[0028] The loose tube 3 is internally provided with the ribbon optical fiber 4 and the first dry water-blocking component 8, and the volume of the ribbon optical fiber 4 accounts for more than 70% and less than or equal to 95% of the internal space volume of the loose tube 3.
[0029] The wrapping tape 2 is wrapped outside the loose tube 3, and the second dry blocking component 6 is further arranged between the wrapping tape 2 and the loose tube 3. The wrapping tape 2 is generally a water-blocking tape, a non-woven fabric or other suitable plastic film, which functions to prevent water seepage and keep the cable core stable.
[0030] The sheath 1 is wrapped outside the wrapping tape 2. The sheath 1 can be made of PE, flame-retardant PE or LSZH. When the flame-retardant PE or LSZH is used, the optical cable has flame-retardant performance.
[0031] In this embodiment, the dry ribbon optical cable is used as a dry water-blocking component instead of grease, which makes the structure more compact and eliminates the construction inconvenience and environmental pollution problems caused by grease.
[0032] By wrapping the ribbon fiber 4 with a loose tube 3 and fitting the inner wall of the loose tube 3 to the ribbon fiber 4 as closely as possible, the ribbon fiber 4 occupies a high proportion inside the loose tube 3, reaching 70%-95%. The fiber has a small degree of freedom, which makes the optical cable structure more compact and helps to improve the structural economy of the optical cable.
[0033] In some preferred embodiments, the weight and volume of the loose tube 3 itself should be minimized while ensuring that the loose tube 3 can wrap the internal ribbon optical fiber 4 and the first dry water-blocking component 8. Therefore, the loose tube 3 is preferably made of a flexible material with a thin wall thickness, such as a thermoplastic material with good elasticity and excellent processing performance, and the wall thickness is 0.1mm-0.5mm.
[0034] In some preferred embodiments, the loose tube 3 is made of one or a mixture of several of PVC, TPU, LSZH or TPEE.
[0035] In some preferred embodiments, there are multiple ribbon optical fibers 4, and the multiple ribbon optical fibers 4 are stacked in a regular manner in the thickness direction.
[0036] like Figure 1 In the illustrated embodiment, there are 12 ribbon fibers 4, and each ribbon fiber 4 includes 12 cores. Each ribbon fiber 4 has a width of 3.0 mm-3.3 mm and a thickness of 0.30 mm-0.36 mm. Figure 1 The width of each ribbon fiber 4 is defined by its vertical direction, and its thickness is defined by its horizontal direction. Each ribbon fiber 4 has 12 cores in its width direction. All 12 ribbon fibers 4 are arranged in parallel and regular order in the horizontal direction, meaning that the 12 cores of each pair of ribbon fibers 4 are aligned one-to-one in the width direction. Thus, the overall cross-section of the ribbon fiber 4 in this embodiment forms a rectangle, and the corresponding loose tube 3 is also set as a rectangular inner cavity, which can effectively wrap the ribbon fiber 4.
[0037] Although the above embodiments disclose implementation methods for this ribbon fiber 4, the present invention does not limit the number of ribbon fibers 4, the number of core strips in each ribbon fiber 4, or the stacking form of the ribbon fibers 4. For example, ribbon fibers 4 with different numbers of core strips can be selected, such as including 2 two-core strips, 2 four-core strips, 2 six-core strips, 2 eight-core strips, 2 ten-core strips, and 2 twelve-core strips, and according to... Figure 1The ribbon optical fiber 4 is arranged horizontally symmetrically as shown in the figure, the middle has more core ribbons, and the two sides have less core ribbons, so that the cross section of the whole ribbon optical fiber 4 is approximately circular, and the corresponding loose tube 3 is also provided with a circular inner cavity, which can well complete the wrapping of the ribbon optical fiber 4.
[0038] In the above embodiments, the material of the first dry water-blocking component 8 and the second dry water-blocking component 6 is water-blocking powder or water-blocking yarn. The common material of water-blocking powder is super absorbent polymer (SAP), i.e. sodium polyacrylate. The water-blocking yarn is usually composed of two parts: one is a reinforcing rib composed of nylon or polyester, which enables the yarn to have good tensile strength and elongation; the other is an expanded fiber or expanded powder containing polyacrylate. When the water-blocking yarn is used, the linear density of a single yarn is not more than 1000D.
[0039] In the above embodiments, in order to effectively realize the water-blocking effect, the expansion rate of the first dry water-blocking component 8 is greater than or equal to 70ml / g / min, and the expansion rate of the second dry water-blocking component 6 is greater than or equal to 65ml / g / min.
[0040] In some embodiments, the full-dry ribbon optical cable further comprises a tensile component 5 embedded in the sidewall of the sheath 1; the tensile component 5 has a plurality of and is arrayed around the center of the optical cable. As shown in the figure, Figure 1 The tensile component 5 is symmetrically distributed at intervals of 180°, and in addition, in some embodiments, it can be distributed at intervals of 5°-30° around the center of the optical cable. The material of the tensile component 5 can be a fiber-plastic composite hard rod or a tensile fiber. When a fiber-plastic composite hard rod is used, the outer diameter should not exceed 1.5mm in consideration of the bending performance of the optical cable.
[0041] In some preferred embodiments, as shown in the figure, Figure 2 The outer wall of the sheath 1 has an air guide groove 7. This structure is for air blowing construction, and the air guide groove 7 is composed of wave crests and troughs at intervals, and the height difference between the highest point of the wave crest and the lowest point of the wave trough is 0.02mm-1mm.
[0042] The full-dry ribbon optical cable of the utility model has the following advantages from the innovations in materials and structure and the like:
[0043] 1. The optical fiber ribbons are neatly stacked into a rectangle, and a flexible loose tube 3 material is wrapped around the optical fiber ribbons, the size of the loose tube 3 is controlled, the loose tube 3 is wrapped around the periphery of the rectangular optical fiber ribbons as much as possible, and the proportion of optical fibers is improved.
[0044] 2. Dry water-blocking materials are used in the loose tube 3, which are distributed around the optical fiber ribbons, and there is no ointment, which greatly improves the construction and convenience.
[0045] 3、For air laying, air guide groove design is adopted to improve air blowing performance and facilitate construction.
[0046] The above merely provides an example of the present application, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of claims of the present application.
Claims
1. An all-dry optical fiber ribbon cable characterized by, The cable comprises: a loose tube, which is internally provided with a ribbon optical fiber and a first dry water-blocking component, the volume of the ribbon optical fiber accounts for more than 70% and less than or equal to 95% of the internal space volume of the loose tube; a wrapping tape, which is wrapped outside the loose tube, and a second dry water-blocking component is further arranged between the wrapping tape and the loose tube; a jacket, which is wrapped outside the wrapping tape.
2. The all-dry optical fiber cable according to claim 1, characterized in that, The loose tube is made of flexible thermoplastic material, and the wall thickness is 0.1mm-0.5mm.
3. The all-dry optical fiber cable according to claim 2, characterized in that, The material of the loose tube is one or a mixture of several of PVC, TPU, LSZH or TPEE.
4. The all-dry optical fiber cable of claim 1, wherein, The size of each ribbon optical fiber is 3.0mm-3.3mm in width and 0.30mm-0.36mm in thickness.
5. The all-dry optical fiber cable according to claim 4, characterized in that, The ribbon optical fiber has a plurality of, and the plurality of ribbon optical fibers are regularly stacked in the thickness direction.
6. The all-dry optical fiber cable according to claim 5, characterized in that, The ribbon optical fiber has 12, and each ribbon optical fiber comprises 12 core ribbons.
7. The all-dry optical fiber cable of claim 1, wherein, The first dry water-blocking component and the second dry water-blocking component are water-blocking powder or water-blocking yarn.
8. The all-dry optical fiber cable according to claim 7, characterized in that, The expansion rate of the first dry water-blocking component is greater than or equal to 70ml / g / min, and the expansion rate of the second dry water-blocking component is greater than or equal to 65ml / g / min.
9. The all-dry optical fiber cable of claim 1, wherein, It further comprises a tensile component, which is embedded in the side wall of the jacket; the tensile component has a plurality of and is arrayed around the center of the optical cable.
10. The all-dry optical fiber cable of claim 1, wherein, The outer wall of the jacket has a gas guide groove, which is composed of spaced wave peaks and troughs, and the height difference between the highest point of the wave peak and the lowest point of the wave trough is 0.02mm-1mm.