Full-dry optical cable

Abstract

The utility model relates to the technical field of optical cables, in particular to a full-dry optical cable, which comprises a cable core, an armor layer and an outer protective layer. Wherein the armor layer is sleeved outside the cable core, and a non-adhesive layer is arranged on the outer surface of the armor layer; the outer sheath comprises a sheath and at least one group of rip cords, the sheath coats the armor layer, each group of rip cords comprises at least two rip cords which are arranged along the same radial direction of the full-dry optical cable, one rip cord is arranged between the cable core and the armor layer, and the other rip cord is arranged between the armor layer and the sheath; the full-dry optical cable further comprises at least one positioning part, the positioning parts are arranged on the outer surface of the sheath, and each positioning part is in one-to-one correspondence with each pair of tearing ropes and is arranged in the same radial direction of the full-dry optical cable with the corresponding pair of tearing ropes. According to the utility model, through the arrangement of the non-adhesion layer on the armor layer and the positioning part on the outer protection layer, rapid and accurate positioning of the position of the tearing rope is realized, the armor layer and the outer protection layer can be easily separated after cutting, the process is time-saving and labor-saving, and the efficiency is high.

Description

Technical Field

[0001] The present application relates to the field of optical cable technology, and in particular to a fully dry optical cable. Background Art

[0002] The main feature of armored optical cable is that one or more layers of metal sheath are added between the cable core and the outer sheath to provide physical protection and enhance the mechanical properties of the optical cable. Full-dry optical cable refers to the use of dry filling materials in the optical cable instead of traditional gel filling, the purpose is to make the optical cable easier to keep clean and more convenient to use during installation and maintenance. Armored full-dry optical cable combines the characteristics of armored optical cable and full-dry optical cable. Its excellent physical protection and waterproof properties make it widely used in direct burial and pipeline laying.

[0003] Although armored full-dry optical cables have many advantages, they are difficult to strip during use. Due to the reinforced design of the armor layer, it is difficult to remove the outer armor and internal filling materials when connecting or maintaining the optical cable.

[0004] At present, in order to solve the problem of difficulty in stripping, some optical cable manufacturers have adopted methods such as adding tear cords to improve the structure of optical cables. However, when stripping such optical cables with tear cords, construction workers need to use a blade to cut through the sheath and steel belt, which takes time and effort to find the tear cord and then pull it to strip. The tear cord is easy to be cut during the process, which requires construction workers to have high proficiency in tool use and stripping skills.

[0005] Therefore, the problem of how to quickly locate and tear the tear rope during the optical cable stripping operation needs to be solved urgently. Utility Model Content

[0006] In order to solve the above-mentioned problems of the prior art, the utility model provides a full-dry optical cable, which is used to solve the technical problems in the prior art that the tear rope in the full-dry optical cable is difficult to quickly locate and difficult to tear.

[0007] The utility model provides a full dry optical cable, comprising:

[0008] An armor layer, wherein the armor layer is sleeved outside the cable core, and a non-adhesive layer is arranged on the outer surface of the armor layer;

[0009] An outer sheath, the outer sheath comprising a sheath and at least one group of tear ropes, the sheath being coated outside the armor layer, each group of tear ropes having at least two pieces and arranged along the same radial direction of the all-dry optical cable, one of the tear ropes being arranged between the cable core and the armor layer, and another of the tear ropes being arranged between the armor layer and the sheath;

[0010] It also includes at least one positioning portion, which is used to mark the position of the tear rope. The positioning portion is arranged on the outer surface of the sheath, and each positioning portion corresponds to each pair of the tear ropes one by one and is arranged in the same radial direction of the full-dry optical cable.

[0011] Furthermore, there are two groups of tear ropes, and the two groups of tear ropes are symmetrically arranged along the circumference of the cable core.

[0012] Furthermore, there are multiple groups of tear ropes, and the multiple groups of tear ropes are evenly arranged along the circumference of the cable core.

[0013] Furthermore, the positioning portion is at least one of a convex structure and a concave structure.

[0014] Furthermore, both sides of the positioning portion have a cutting plane, and the cutting plane is parallel to the radial direction of the corresponding tear rope.

[0015] Furthermore, both sides of the positioning portion have a cutting plane, and the cutting plane is located in the radial direction of the full-dry optical cable.

[0016] Furthermore, the positioning portion and the sheath have different colors.

[0017] Furthermore, the armor layer includes multiple layers of metal strips, and the tear ropes are arranged between adjacent metal strips.

[0018] Furthermore, the non-stick layer is an oily coating.

[0019] Furthermore, the non-stick layer is a non-metallic layer, and the melting point of the non-metallic layer is greater than the melting point of the sheath.

[0020] Beneficial effects:

[0021] It can be seen from the above technical scheme that the technical scheme of the utility model provides a fully dry optical cable. By setting a positioning part on the outer surface of its sheath, construction personnel can quickly locate the exact position of the tear rope through direct observation during the optical cable stripping operation; the setting of the non-stick layer makes the tearing process smoother, and the addition of a tear rope realizes layered stripping, which reduces the resistance in the tearing process and the risk of damage to the tear rope, greatly reducing the difficulty of stripping the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0023] Figure 1 A cross-sectional view of a fully dry optical cable provided in an embodiment of the present application.

[0024] Figure 2 A cross-sectional view of a fully dry optical cable provided in another embodiment of the present application

[0025] Figure 3 A cross-sectional view of a fully dry optical cable provided in yet another embodiment of the present application.

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0027] In the figure, the meanings of the reference numerals are as follows:

[0028] Cable core 1, optical fiber core wire 1-1, loose tube 1-2, armor layer 2, outer sheath 3, jacket 3-1, tear cord 3-2, positioning part 4, cutting plane 4-1. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may 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 clearly and specifically defined.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0034] An embodiment of the utility model provides a fully dry optical cable, the surface of which has a positioning portion, which can help construction personnel quickly locate the position of the tear rope, thereby reducing unnecessary time consumption and construction process during the construction process; and through the setting of a non-adhesive layer, the tearing process is made smoother, and by adding a tear rope, layered stripping is achieved, which reduces the resistance in the tearing process and the risk of damage to the tear rope, greatly reduces the difficulty of stripping the optical cable, and improves the convenience and efficiency of cable construction.

[0035] Reference Figure 1, which shows a cross-sectional view of a full-dry optical cable of an embodiment of the utility model. As can be seen from the figure, the full-dry optical cable includes a cable core 1, an armor layer 2, an outer sheath 3 and a positioning portion 4, wherein the armor layer 2 and the outer sheath 3 are sequentially wrapped around the cable core 1 to provide protection and support for the cable core 1, and the positioning portion 4 is arranged at the outermost portion of the full-dry optical cable to mark the position of the tear rope 3-2 therein, that is, the positioning portion 4 is used to mark the position of the tear rope 3-2.

[0036] Reference Figure 1 , the cable core 1 usually includes a plurality of optical fiber units, which can be arranged in various forms such as circular and layered, and each of the optical fiber units includes a plurality of optical fiber cores 1-1 and a loose tube 1-2 sleeved outside all the optical fiber cores 1-1. The loose tube 1-2 is used to protect the optical fiber cores 1-1, and can be made of high-strength and high-flexibility materials such as PBT, PP, TPEE or LSZH or TPU, etc., to resist external physical pressure, while maintaining the safety and stability of the internal optical fiber cores 1-1, and preventing the optical fiber cores 1-1 from being subjected to physical damage such as pressure or bending and affecting performance.

[0037] Reference Figure 1 The armor layer 2 is wrapped around the cable core 1 and is usually made of a metal material such as a steel strip or an aluminum strip, and is used to provide physical protection for the cable core 1 and resist external damage, such as manual excavation, rodents, etc.

[0038] In conventional all-dry optical cables, the tear cord 3-2 is usually arranged between the cable core 1 and the armor layer 2. When stripping, the tear cord 3-2 needs to strip the steel belt and the sheath 3-1 at the same time, which is time-consuming and labor-intensive, and the risk of the tear cord 3-2 breaking is relatively high. In this embodiment, the all-dry optical cable increases the number of tear cords 3-2, referring to Figure 1 The outer sheath 3 includes a sheath 3-1 and at least one group of tear ropes 3-2. The sheath 3-1 is usually made of PE, flame-retardant PE or LSZH, etc., and is sleeved outside the armor layer 2. Each group of tear ropes 3-2 has at least two, and are arranged along the same radial direction of the full-dry optical cable. One of the tear ropes 3-2 is arranged between the cable core 1 and the armor layer 2, and the other tear rope 3-2 is arranged between the armor layer 2 and the sheath 3-1.

[0039] During the stripping operation, the sheath 3-1 is firstly stripped by the outermost tear rope 3-2, and then the armor layer 2 is stripped by the inner tear rope 3-2, that is, the stripping operation is performed in layers, thereby reducing the resistance in the tearing process and the risk of damage to the tear rope 3-2, and greatly reducing the difficulty of stripping the optical cable.

[0040] It is understandable that, in the case of adopting the layered stripping scheme, the number of tear ropes 3-2 in each group is related to the number of layers. Specifically, according to different protection requirements, the armor layer 2 can be one layer or more layers, that is, single-layer armor, double-layer armor and multi-layer armor, among which single-layer armor is the most common. For details, please refer to the contents in the above embodiments, which will not be described here. In some more stringent or extremely harsh application scenarios, double-layer armor or multi-layer armor can be used. In this case, the armor layer 2 is formed by winding two or more metal strips in sequence, and tear ropes 3-2 are selectively provided between adjacent metal strips.

[0041] The armor layer 2 is provided with a non-adhesive layer, which can be a non-metallic layer, such as a plastic film or a coated anti-adhesive coating. The melting point of the non-adhesive layer is higher than the melting point of the sheath 3-1. After the extrusion of the sheath 3-1 is completed, the non-adhesive layer is blocked between the sheath 3-1 and the armor layer 2, reducing or eliminating the adhesion between the two, so that during the stripping operation, the construction personnel can easily separate the armor layer 2 and the sheath 3-1. The non-adhesive layer can also be an oily coating, which also prevents the armor layer 2 and the sheath 3-1 from adhering.

[0042] Reference Figure 1 , the tear ropes 3-2 have two groups, and the two groups of tear ropes 3-2 are symmetrically arranged along the circumference of the cable core 1. All the tear ropes 3-2 are located on the same diameter on the circular cross-section of the full-dry optical cable, ensuring that no matter which group of tear ropes 3-2 are peeled from, the same or similar tearing effect can be obtained. It can be understood that, according to the different parameters of the material composition, caliber and other parameters of the full-dry optical cable, in some embodiments of the utility model, the tear ropes 3-2 can also be provided with multiple groups, and each group of tear ropes 3-2 is radially and evenly arranged along the circumference of the cable core 1.

[0043] To facilitate distinction, the positioning portion 4 is at least one of a convex shape and a concave shape, and may also be other forms different from the smooth outer surface of the sheath 3-1, so that construction personnel can quickly locate the position of the tear rope 3-2 by direct observation, and can quickly find the tear rope 3-2 by cutting the sheath 3-1 at the position of the positioning portion 4.

[0044] Reference Figure 1 , which shows a convex positioning portion 4. Figure 2 , which shows a concave convex structure. When the convex shape and the concave shape adopt the same outer contour (such as a semicircle), there is no obvious difference in the marking effect of the two on the position of the tear rope 3-2. In actual production, it can be selected according to actual conditions, and no specific limitation is made here.

[0045] Reference Figure 3 and Figure 4 In some embodiments of the utility model, the two sides of the positioning portion 4 have a cutting plane 4-1, and the setting of the cutting plane 4-1 can intuitively guide the cutting position, that is, the construction personnel can directly place the tool plane close to the cutting plane 4-1 for cutting. Among them, the cutting plane 4-1 can be set to be parallel to the radial direction of the corresponding tear rope 3-2. Under the guidance of the parallel cutting planes 4-1 on both sides, no matter how deep the cutting is, the blade can accurately avoid the rope body of the tear rope 3-2 and fall into its adjacent position. The two cutting planes 4-1 can also be set to be inclined at a certain angle. The cutting plane 4-1 can be located in the radial direction of the full-dry optical cable, and the two sides are surrounded to form a fan-shaped area, and the corresponding tear rope 3-2 groups are all located in the fan-shaped area, so that they can be closer to the inner layer of the tear rope 3-2 when cutting.

[0046] In certain embodiments of the utility model, the positioning portion 4 is different from the color of the sheath 3-1, and the color comparison provides a more intuitive guide for construction personnel, further saving the time of searching. In summary, the utility model provides a fully dry optical cable, which, by setting a positioning portion on the outer surface of its sheath, enables construction personnel to quickly locate the exact position of the tear rope by direct observation during the optical cable stripping operation; the non-adhesive layer is set to make the tearing process smoother, and the tear rope is added to achieve layered stripping, which reduces the resistance during the tearing process and the risk of damage to the tear rope, greatly reducing the difficulty of stripping the optical cable.

[0047] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0048] The above is a detailed introduction to a full-dry optical cable provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A fully dry optical cable, characterized in that: include: An armor layer, wherein the armor layer is sleeved outside the cable core, and a non-adhesive layer is arranged on the outer surface of the armor layer; An outer sheath, the outer sheath comprising a sheath and at least one group of tear ropes, the sheath being arranged outside the armor layer, each group of tear ropes having at least two pieces and arranged along the same radial direction of the full-dry optical cable, one of the tear ropes being arranged between the cable core and the armor layer, and another of the tear ropes being arranged between the armor layer and the sheath; It also includes at least one positioning portion, which is used to mark the position of the tear rope. The positioning portion is arranged on the outer surface of the sheath, and each positioning portion corresponds to each pair of the tear ropes one by one and is arranged in the same radial direction of the full-dry optical cable.

2. The all-dry optical cable according to claim 1, characterized in that: There are two groups of tear ropes, and the two groups of tear ropes are symmetrically arranged along the circumference of the cable core.

3. The all-dry optical cable according to claim 1, characterized in that: There are multiple groups of tear ropes, and the multiple groups of tear ropes are evenly arranged along the circumference of the cable core.

4. The all-dry optical cable according to claim 1, characterized in that: The positioning portion is at least one of a convex structure and a concave structure.

5. The all-dry optical cable according to claim 1, characterized in that: The two sides of the positioning portion have a cutting plane, and the cutting plane is parallel to the radial direction of the corresponding tear rope.

6. The all-dry optical cable according to claim 1, characterized in that: The two sides of the positioning portion are provided with a cutting plane, and the cutting plane is located in the radial direction of the full-dry optical cable.

7. The all-dry optical cable according to claim 1, characterized in that: The positioning portion and the sheath have different colors.

8. The all-dry optical cable according to claim 1, characterized in that: The armor layer includes multiple layers of metal strips, and the tear ropes are arranged between adjacent metal strips.

9. The all-dry optical cable according to claim 1, characterized in that: The non-stick layer is an oily coating.

10. The all-dry optical cable according to claim 1, characterized in that: The non-stick layer is a non-metal layer, and the melting point of the non-metal layer is greater than the melting point of the sheath.

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