Central tube type optical cable

Abstract

The utility model provides a central tube type optical cable, which comprises a plurality of subunits, the centers of the plurality of subunits are twisted to form a sleeve bundle, the outer circumference of the sleeve bundle is provided with a first sleeve, and a gap between the first sleeve and the sleeve bundle is filled with first fiber paste; and the overall tensile property and the volume fineness of the sleeve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cables, in particular to a central tube type optical cable. Background Art

[0002] Central tube optical cable is widely used in power, communication and other industries. In power systems, it is often used as OPGW optical cable to protect optical fibers from environmental conditions (such as lightning, short circuit, load) and ensure the reliability and stability of power communication. In the field of communication, central tube optical cable is used in voice, video, data transmission, SCADA network and other scenarios to provide efficient and stable communication services. However, the existing central tube optical cable has the following technical problems:

[0003] 1) At present, the central tube optical cable has a single tube structure without cable twisting, and the overall tensile performance of the cable body is poor. Although the cost advantage is obvious compared with ordinary optical cables, it is affected by its own mechanical properties and has a narrow application field;

[0004] 2) Currently, the central tube optical cable casing adopts loose casing and tight casing, which is used to protect the optical fiber, aiming to provide a certain excess length for the optical fiber, reduce the tangential force strain of the optical fiber during bending and winding, and improve the overall mechanical properties and environmental resistance. However, when faced with some high tensile performance requirements, the loose casing and tight casing have poor fiber capacity performance. Utility Model Content

[0005] In order to solve the technical problems of poor overall tensile performance of the cable body and poor fiber density of the casing, the utility model proposes a central tube type optical cable, which improves the overall tensile performance and the fiber density of the casing.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] The utility model provides a central tube optical cable, comprising: a plurality of subunits, wherein the plurality of subunits are centrally twisted to form a sleeve bundle, a first sleeve is arranged on the outer circumference of the sleeve bundle, and a first fiber paste is filled in the gap between the first sleeve and the sleeve bundle.

[0008] The utility model provides a central tube type optical cable, which improves the overall tensile performance and the fiber capacity of the casing.

[0009] As a preferred technical solution, the subunit includes: an optical fiber unit, and a second sleeve is provided on the outer circumference of the optical fiber unit.

[0010] As a preferred technical solution, the gap between the second sleeve and the optical fiber unit is filled with a second fiber paste.

[0011] As a preferred technical solution, the optical fiber unit includes: a central optical fiber, and a plurality of peripheral optical fibers are arranged on the outer circumference of the central optical fiber.

[0012] As a preferred technical solution, the wall thickness of the first sleeve is 0.4-0.5 mm.

[0013] As a preferred technical solution, the wall thickness of the first sleeve is 0.45 mm.

[0014] As a preferred technical solution, the wall thickness of the second sleeve is 0.25-0.35 mm.

[0015] As a preferred technical solution, the wall thickness of the second sleeve is 0.3 mm.

[0016] As a preferred technical solution, the number of peripheral optical fibers is an even number.

[0017] As a preferred technical solution, the number of the subunits is an odd number.

[0018] The utility model provides a central tube type optical cable, which has the following beneficial effects:

[0019] 1) Improved the overall tensile strength and fiber density of the casing;

[0020] 2) This structure has a significant high tensile strength when facing torsion, bending, winding, etc., which can effectively protect the optical fiber and prevent optical communication problems caused by the optical fiber hitting the wall or breaking;

[0021] 3) The plurality of sub-units are centrally twisted to form a sleeve bundle, which not only increases the fiber density of the second sleeve, but also improves the overall tensile performance;

[0022] 4) The wall thickness of the second sleeve is 0.25-0.35 mm, which improves the fiber fusion rate of the optical fiber and can effectively protect the optical fiber to prevent optical communication problems caused by the optical fiber being hit against the wall or broken;

[0023] 5) The wall thickness of the first sleeve is 0.4-0.5 mm, which can improve the lateral pressure resistance and punching resistance of the central tube optical cable and improve the overall mechanical properties of the central tube optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a central tube optical cable provided by the utility model;

[0025] Among them, 1-optical fiber unit; 11-central optical fiber; 12-peripheral optical fiber; 2-second fiber paste; 3-second sleeve; 4-first fiber paste; 5-first sleeve. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0028] like Figure 1 As shown, the utility model provides a central tube optical cable, comprising: an optical fiber unit 1, a second sleeve 3 is provided on the outer circumference of the optical fiber unit 1, a second fiber paste 2 is filled in the gap between the second sleeve 3 and the optical fiber unit 1, to form a sub-unit, a plurality of the sub-units are centrally twisted to form a sleeve bundle, a first sleeve 5 is provided on the outer circumference of the sleeve bundle, and a first fiber paste 4 is filled in the gap between the first sleeve 5 and the sleeve bundle.

[0029] The central tube optical cable improves the overall tensile strength and the fiber density of the casing.

[0030] This structure has significant high tensile strength when facing torsion, bending, winding, etc., and can effectively protect the optical fiber and prevent optical communication problems caused by the optical fiber hitting the wall or breaking.

[0031] Preferably, a plurality of said sub-units are centrally twisted to form a sleeve bundle, which not only improves the fiber density of the second sleeve, but also improves the overall tensile performance;

[0032] The casing bundle is a highly compact and high tensile strength central casing;

[0033] Preferably, the optical fiber unit 1 comprises: a central optical fiber 11, a plurality of peripheral optical fibers 12 are arranged on the outer circumference of the central optical fiber 11, the peripheral optical fibers 12 are an even number, and the peripheral optical fibers 12 are preferably 6;

[0034] Preferably, a second sleeve 3 is provided on the outer circumference of the peripheral optical fiber 12, and the wall thickness of the second sleeve 3 is 0.25-0.35 mm. The wall thickness of the second sleeve 3 is preferably 0.25 mm, 0.3 mm, and 0.35 mm. Due to space limitations and for the sake of simplicity, the utility model no longer exhaustively lists the specific point values ​​included in the range. The wall thickness of the second sleeve 3 is preferably 0.3 mm, which increases the fiber fusion rate of the optical fiber and can effectively protect the optical fiber to prevent optical communication problems caused by the optical fiber being subjected to force and hitting the wall or breaking.

[0035] Preferably, the gap between the second sleeve 3 and the optical fiber unit 1 is filled with a second fiber paste 2 to form a subunit. As a light transmission tool, the performance of the optical fiber unit will be affected by environmental factors, especially humidity. The filling of the second fiber paste 2 can effectively isolate the optical fiber unit from contact with humid air. The second fiber paste 2 can prevent moisture in the air from corroding the optical fiber unit and protect the optical fiber unit from damage. Although the optical fiber unit has a high strength, excessive mechanical force may still cause damage to it. The second fiber paste 2 acts as a cushion for the optical fiber unit and can buffer the mechanical forces such as vibration, impact, and bending on the optical fiber unit. The filling of the second fiber paste 2 can reduce such damage to a certain extent.

[0036] Preferably, the subunits are an odd number, and the 5 subunits are centrally twisted to form a sleeve bundle. The outer circumference of the sleeve bundle is provided with a first sleeve 5, and the wall thickness of the first sleeve 5 is 0.4-0.5 mm. The wall thickness of the first sleeve 5 is preferably 0.4 mm, 0.45 mm, and 0.5 mm. Due to space limitations and for simplicity, the utility model no longer exhaustively lists the specific point values ​​included in the range. The wall thickness of the first sleeve 5 is preferably 0.45 mm, which can improve the lateral pressure resistance and punching resistance of the central tube optical cable, and improve the overall mechanical properties of the central tube optical cable.

[0037] The gap between the first sleeve 5 and the sleeve bundle is filled with a first fiber paste 4, and the filling of the first fiber paste 4 in the gap between the first sleeve 5 and the sleeve bundle plays an important role in protecting the optical fiber from moisture and mechanical damage and improving the transmission performance and service life of the optical fiber.

[0038] The utility model provides a method for preparing a central tube type optical cable, comprising the following steps:

[0039] First, a thin-walled second sleeve 3 is extruded outside the optical fiber unit, and the gap between the thin-walled second sleeve 3 and the optical fiber unit is filled with a second fiber paste 2 as a subunit, and then the n subunits are centrally twisted to form a thin-walled sleeve bundle, and finally a thin-walled first sleeve 5 is extruded outside the thin-walled sleeve bundle to form a central tube optical cable.

[0040] The wall thickness of the thin-walled second sleeve 3 is preferably 0.25 mm, 0.3 mm, or 0.35 mm. Due to space limitations and for simplicity, the present invention will no longer exhaustively list the specific point values ​​included in the range. The wall thickness of the second sleeve 3 is preferably 0.3 mm, which increases the fiber fusion rate of the optical fiber, can effectively protect the optical fiber, and prevent optical communication problems caused by the optical fiber being subjected to force and hitting the wall or breaking.

[0041] The wall thickness of the thin-walled first sleeve 5 is preferably 0.4 mm, 0.45 mm, or 0.5 mm. Due to space limitations and for simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range. The wall thickness of the first sleeve 5 is preferably 0.45 mm, which can improve the lateral pressure resistance and punching resistance of the central tube optical cable and improve the overall mechanical properties of the central tube optical cable.

[0042] The central tube optical cable prepared by the central tube optical cable preparation method has significant high tensile resistance when facing torsion, bending, winding, etc., and can effectively protect the optical fiber and prevent optical communication problems caused by the optical fiber hitting the wall or breaking.

[0043] It can be understood that the utility model is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the teachings of the utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all various changes or equivalent substitutions falling within the scope of the claims of the present application are included. In addition, under the teachings of the utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A central tube optical cable, characterized in that: include: A plurality of sub-units are centrally twisted to form a sleeve bundle, a first sleeve is arranged on the outer circumference of the sleeve bundle, and a first fiber paste is filled in the gap between the first sleeve and the sleeve bundle.

2. The central tube optical cable according to claim 1, characterized in that: The subunit comprises an optical fiber unit, and a second sleeve is arranged on the outer circumference of the optical fiber unit.

3. The central tube optical cable according to claim 2, characterized in that: The gap between the second sleeve and the optical fiber unit is filled with a second fiber paste.

4. The central tube optical cable according to claim 2, characterized in that: The optical fiber unit comprises a central optical fiber, and a plurality of peripheral optical fibers are arranged on the outer circumference of the central optical fiber.

5. The central tube optical cable according to claim 1, characterized in that: The wall thickness of the first sleeve is 0.4-0.5 mm.

6. The central tube optical cable according to claim 5, characterized in that: The wall thickness of the first sleeve is 0.45 mm.

7. The central tube optical cable according to claim 2, characterized in that: The wall thickness of the second sleeve is 0.25-0.35 mm.

8. The central tube optical cable according to claim 2, characterized in that: The wall thickness of the second sleeve is 0.3 mm.

9. The central tube optical cable according to claim 4, characterized in that: The peripheral optical fibers are an even number.

10. The central tube optical cable according to claim 2, characterized in that: The number of the subunits is odd.

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