CN209784617U - Remote optical cable - Google Patents

Abstract

the utility model relates to an optical fiber communication facility technical field discloses an optical cable of zooming out. The remote optical cable comprises an optical fiber, and a central tube, an inner waterproof layer, a reinforcing layer, an outer waterproof layer and a sheath which are sequentially coated on the outer layer of the optical fiber; the reinforcing layer is a grid-shaped structure woven by aramid yarns; the outer waterproof layer is formed by longitudinally wrapping a waterproof tape. This optical cable of zooming out's enhancement layer comprises aramid yarn for the optical cable of zooming out has stronger tensile strength, and weaves into fine and close latticed structure with aramid yarn, can avoid the heat transfer of sheath to give the center tube, causes center tube and interior waterproof layer to take place to glue glutinous. In addition, set up outer waterproof layer between aramid yarn and sheath for aramid yarn and sheath direct contact not prevent that sheath and aramid yarn from gluing too compactly, should pull away the optical cable and easily peel off during the construction, improve the efficiency of construction.

Description

A remote optical cable

technical field

The utility model relates to the technical field of optical fiber communication facilities, in particular to a remote optical cable.

Background technique

Due to its small outer diameter, light weight and many other advantages, remote optical cables are widely used in mobile communications, and are generally used in short-distance and indoor coverage scenarios.

In the existing remote optical cables, bundled aramid yarns, a central tube, a waterproof layer formed by wrapping water blocking tapes, aramid yarns and a sheath are generally wrapped around the optical fiber in sequence. The aramid yarn adjacent to the sheath is often wrapped longitudinally, and gaps are likely to occur after longitudinal wrapping. Once a gap occurs, a large amount of heat from the sheath will be transferred to the center tube, resulting in excessive sticking of the center tube and the water blocking tape. Moreover, the longitudinally wrapped aramid yarn is in direct contact with the sheath, and the sudden cooling and shrinkage will make the aramid yarn and the sheath stick too tightly when the cable is stripped, making it difficult to peel off, which directly affects the construction efficiency. Before using the remote optical cable, the connecting devices at both ends must be assembled. Most of the existing sheaths have a circular structure, and the color of the sheath is mostly black. When there are multiple different optical fibers in the remote optical cable, It is very difficult to classify, fix and identify remote optical cables during construction and maintenance.

Utility model content

Based on the above, the purpose of this utility model is to provide a remote optical cable, which is easier to peel off during construction and maintenance, and is easy to classify and fix, so as to improve construction efficiency.

For reaching above-mentioned purpose, the utility model adopts following technical scheme:

A remote optical cable, comprising: an optical fiber and a central tube sequentially coated on the outer layer of the optical fiber, an inner waterproof layer, a reinforcement layer, an outer waterproof layer, a tear layer and a sheath; the reinforcement layer is made of aramid yarn A woven grid-like structure; the outer waterproof layer is composed of a water-blocking tape longitudinally; the optical fiber is provided with multiple pieces; the outer surface of the sheath is provided with protrusions.

As a preferred solution for pulling the optical cable, the inner waterproof layer is formed by wrapping the water blocking tape.

As a preferred solution for pulling the optical cable, the tearing layer includes two tearing cords arranged oppositely, and the tearing cords are fixedly arranged between the outer waterproof layer and the sheath.

As a preferred solution for pulling the optical cable, a filling layer is arranged between the optical fiber and the central tube.

As a preferred solution for pulling the optical cable, the filling layer is made of the aramid yarn.

As a preferred solution for pulling the optical cable, the filling layer is provided with a water-blocking yarn.

As a preferred solution of the remote optical cable, each of the optical fibers is a tight-buffered optical fiber.

As a preferred solution of the remote optical cable, the material coated on the outer layer of the tight-buffered optical fiber is polyvinyl chloride, low-smoke halogen-free material or polylaurolactam.

As a preferred solution for the remote optical cable, the sheath is made of low-smoke, halogen-free, flame-retardant polyolefin.

The beneficial effects of the utility model are:

The utility model provides a remote optical cable. The remote optical cable includes an optical fiber, a central tube coated on the outer layer of the optical fiber, an inner waterproof layer, a strengthening layer, an outer waterproof layer, a tear layer and a sheath. The reinforcement layer is made of aramid yarn, which makes the remote optical cable have strong tensile properties, and the aramid yarn is woven into a dense grid structure, which can prevent the heat from the sheath from being transferred to the center tube, causing the center tube and the inner tube to be damaged. The waterproof layer is sticking. An outer waterproof layer is set between the aramid yarn and the sheath, so that the aramid yarn does not directly contact the sheath, preventing the sheath and the aramid yarn from sticking too tightly, and there is a tear between the outer waterproof layer and the sheath layer, making the remote optical cable easy to peel off during use. In addition, the outer surface of the sheath is also provided with protrusions, which facilitate the classification, fixing and identification of the remote optical cables during construction and maintenance, and improve construction efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the illustrations of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings according to the content of the embodiments of the present invention and these drawings without any creative effort.

Fig. 1 is a schematic structural view of the remote optical cable provided by the utility model;

Fig. 2 is a cross-sectional view of the remote optical cable provided by the present invention.

In the picture:

1-optical fiber, 2-filling layer, 3-central tube;

41-inner waterproof layer, 42-outer waterproof layer, 43-water blocking yarn;

5-reinforcing layer, 6-sheath.

Detailed ways

In order to make the technical problem solved by the utility model, the technical scheme adopted and the technical effect achieved clearer, the technical scheme of the embodiment of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiment is only Some embodiments of the utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model.

As shown in Figures 1-2, this embodiment provides a remote optical cable, which includes an optical fiber 1, a central tube 3 that covers the outer layer of the optical fiber 1 in sequence, an inner waterproof layer 41, a strengthening layer 5, an outer Waterproof layer 42 and sheath 6. Wherein, the reinforcing layer 5 is a grid structure woven with aramid yarn. The reinforcing layer 5 is made of aramid yarn, so that the remote optical cable has strong tensile properties, and the aramid yarn is woven into a dense grid structure, which can prevent the heat from the sheath 6 from being transferred to the center tube 3, causing the central The tube 3 and the inner waterproof layer 41 stick together. In addition, an outer waterproof layer 42 is provided between the aramid yarn and the sheath 6, so that the aramid yarn does not directly contact the sheath 6, and prevents the sheath 6 and the aramid yarn from sticking too tightly. Stripping, improve construction efficiency.

Preferably, in order to further improve the easy-peeling effect of the remote optical cable, a tearing layer is arranged between the outer waterproof layer 42 and the sheath 6, specifically, the tearing layer includes two tearing ropes arranged oppositely, and the tearing ropes It is fixedly arranged between the outer waterproof layer 42 and the sheath 6 . During on-site construction, the operator holds two tearing ropes with both hands and pulls them in two directions away from each other, so that the sheath 6 can be easily torn. Simple operation and high tearing efficiency.

Further, protrusions are provided on the surface of the sheath 6 . In order to easily distinguish different types of remote optical cables, protrusions of different shapes can be provided on the sheaths 6 of different types of remote optical cables, which can facilitate operators to quickly find the required remote optical cables.

Further, the outer waterproof layer 42 is formed by wrapping the water blocking tape longitudinally, and the inner waterproof layer 41 is formed by wrapping the water blocking tape around it. Since the outer surface of the central tube 3 is relatively smooth, the inner waterproof layer 41 adopts a water-blocking tape wrapping structure, which can ensure a certain friction coefficient between the central tube 3 and the reinforcing layer 5. When an external force acts, the central tube 3 and the reinforcing layer 5 will not Significant displacement will occur. Moreover, the inner waterproof layer 41 adopts a water-blocking tape wrapping structure, which is environmentally friendly and convenient for construction of optical fiber welding and splicing. The outer waterproof layer 42 adopts a water-blocking tape longitudinal wrapping structure, which can effectively isolate the adhesion between the sheath 6 and the reinforcing layer 5 . At the same time, because the cable diameter of the wrapping structure of the water blocking tape is not round, the sheath 6 is adsorbed at the wrapping interface, and the longitudinal wrapping structure of the water blocking tape is convenient for stripping the optical cable, which brings convenience for construction stripping.

Further, in this embodiment, the sheath 6 is made of low-smoke, halogen-free, flame-retardant polyolefin.

Further, multiple optical fibers 1 are arranged in the remote optical cable. Since the remote optical cable has more opportunities to bend and route during use, the remote optical cable needs to be super flexible. In this embodiment, each optical fiber 1 is a tight-buffered optical fiber. The tight-buffered optical fiber is made by directly covering the primary coated optical fiber of the bare optical fiber with plastic twice. Tight-buffered optical fiber has good flexibility, excellent mechanical and environmental performance. Preferably, the material coated on the outer layer of the tight-buffered optical fiber may be polyvinyl chloride, low-smoke halogen-free material or polylaurolactam.

Further, a filling layer 2 is arranged between the optical fiber 1 and the central tube 3 , and in this embodiment, the filling layer 2 is made of bundled aramid yarn. Moreover, the water-blocking yarn 43 is arranged in the filling layer 2, which improves the water-blocking effect and prolongs the service life of the remote optical cable.

Note that the above are only preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the utility model is not limited to the specific embodiments described here, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the utility model. Therefore, although the utility model has been described in detail through the above embodiments, the utility model is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the utility model. The scope of the present invention is determined by the appended claims.

Claims (9)

1. A remote optical cable, characterized in that it comprises: an optical fiber (1) and a central tube (3) coated on the outer layer of the optical fiber (1) in turn, an inner waterproof layer (41), and a strengthening layer (5) , outer waterproof layer (42), tear layer and sheath (6); The reinforcing layer (5) is a grid structure woven with aramid yarn; The outer waterproof layer (42) is composed of a longitudinal wrapping of water blocking tape; The optical fibers (1) are provided with multiple pieces, and the outer surface of the sheath (6) is provided with protrusions. 2. The remote optical cable according to claim 1, characterized in that, the inner waterproof layer (41) is formed by wrapping the water blocking tape. 3. The remote optical cable according to claim 1, characterized in that, the tearing layer comprises two tearing ropes arranged oppositely, and the tearing ropes are fixedly arranged on the outer waterproof layer (42) and the between the sheaths (6). 4. The remote optical cable according to claim 1, characterized in that a filling layer (2) is arranged between the optical fiber (1) and the central tube (3). 5. The remote optical cable according to claim 4, characterized in that, the filling layer (2) is made of the aramid yarn. 6. The remote optical cable according to claim 4, characterized in that, the filling layer (2) is provided with a water-blocking yarn (43). 7. The remote optical cable according to claim 1, characterized in that, each of the optical fibers (1) is a tight-buffered optical fiber. 8 . The remote optical cable according to claim 7 , wherein the material coated on the outer layer of the tight-buffered optical fiber is polyvinyl chloride, low-smoke halogen-free material or polylaurolactam. 9. The remote optical cable according to claim 1, characterized in that, the sheath (6) is made of low-smoke, halogen-free, flame-retardant polyolefin.