CN207882528U - Miniature pencil optical cable with cold-resistant buffer layer - Google Patents

Abstract

The utility model is the miniature pencil optical cable with cold-resistant buffer layer, this kind of miniature pencil optical cable includes Loose tube, center reinforcemen, gasket for packing outer jacket and cold-resistant buffer layer, fiber paste is wherein filled in Loose tube, optical fiber is installed in fiber paste, two layers of cellular regular hexagon structure is installed in cold-resistant buffer layer, wherein big regular hexagon honeycomb structure supports two wall of cold-resistant buffer layer, small regular hexagon honeycomb structure is embedded in big regular hexagon honeycomb structure, and the half that the height of small regular hexagon honeycomb structure is big regular hexagon honeycomb structure, still air in big regular hexagon honeycomb structure can realize the effect of thermal insulation, and small regular hexagon honeycomb structure is due to compact-sized intensity higher, it can play the role of shock-absorbing protecting.

Description

Micro-bundle fiber optic cable with cold-resistant shock-absorbing layer

technical field

The utility model relates to the field of optical cable equipment, in particular to a miniature bundled optical cable with a cold-resistant and shock-absorbing layer.

Background technique

At present, in order to gain an advantage in the new round of broadband business competition, communication operators are facing two practical problems when constructing large-scale optical cable networks: First, the serious shortage of underground pipe hole resources has led communication operators to implement pipeline The sharing of resources pays a great price, which increases the initial investment cost of communication operators. The second is that operators consider the future broadband demand when building optical cable networks, and the number of optical cable cores buried at one time is relatively large, resulting in a very low utilization rate of optical cable cores for a long time. Some domestic manufacturers have developed more specifications of micro-bundle optical cables, and the center-bundle tube type and layer-twisted type micro-cables are commonly used in the market. The main products used in stranded micro-cables are 12-144 cores. The minimum outer diameter of domestic stranded loose tube is 1.55mm, the wall thickness reaches 0.15mm, and the minimum outer diameter of 72-core micro-cable is 5.7mm.

Contents of the invention

The technical problem to be solved by the utility model is to provide a micro-bundle optical cable with a cold-resistant and shock-absorbing layer. The outer diameter of the finished optical cable is as small as possible. The fiber content is large, and it can ensure multi-signal transmission, and the outer sheath of this kind of optical cable contains a honeycomb structure, which can be used for temperature insulation and shock absorption, and is light in weight and high in strength.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A micro-bundle optical cable with a cold-resistant and shock-absorbing layer is characterized in that: it includes a loose tube, and the loose tube is arranged around a central strengthening member, and the central strengthening member is tightly surrounded by a loose tube and a filling rope , the loose tube and the filling rope are fixedly installed in the cold-resistant and shock-absorbing layer, and the outer surface of the cold-resistant and shock-absorbing layer is wrapped with an outer sheath;

The loose tube is filled with fiber paste, and several optical fibers are installed in the fiber paste;

The cold-resistant and shock-absorbing layer is composed of an inner wall and an outer wall. Several regular hexagonal brackets are installed between the inner wall and the outer wall to form a large regular hexagonal support structure. Each of the large regular hexagonal support structures A small regular hexagonal support structure composed of small regular hexagonal brackets is installed in the regular hexagonal space. The large regular hexagonal support structure and the small regular hexagonal support structure are both honeycomb-shaped, and the large regular hexagonal support structure is honeycomb-shaped. The direction of the large regular hexagonal outer wall of the rectangular support structure and the small regular hexagonal outer wall of the small regular hexagonal support structure is the same as the radial direction of the central reinforcement.

In order to optimize the above-mentioned utility models, the specific measures taken also include:

The diameter of the optical fiber is 200 μm, 12 optical fibers are installed in each loose tube, and the outer diameter of the loose tube is not more than 1.4 mm.

The space surrounded by the outer wall of the loose tube, the outer wall of the central reinforcement, the outer wall of the filling rope and the inner wall of the cold-resistant and shock-absorbing layer is filled with aramid yarn.

The central reinforcement is phosphating steel wire.

The outer sheath is made of high-density polyethylene.

The height of the small regular hexagonal outer wall is half of the height of the large regular hexagonal outer wall.

The aramid yarn, the loose tube and the filling rope are wrapped with a water-blocking tape, and the outer surface of the water-blocking tape is closely connected with the inner surface of the cold-resistant and shock-absorbing layer.

The loose tube is a PBT tube, and the number of the loose tube is at least one.

The beneficial effects that this kind of micro-bundle optical cable with cold-resistant and shock-absorbing layer can achieve are:

First, the use of smaller-diameter optical fibers and loose tubes enables more optical fiber pipelines to be placed in municipal pipelines, ensuring the utilization of municipal pipelines.

Second, the loose tube is reinforced PBT, and the excess length is controlled by the water temperature and the tension of the take-up and pay-off line. At the same time, the reinforced PBT can harden the tube and prevent the tube from being deformed by force during re-cable production.

Third, the fiber paste is mainly filled in the sleeve to ensure the structural size of the sleeve, and its good thixotropy can ensure that the optical fiber is not stressed inside the sleeve.

Fourth, the cold-resistant and shock-absorbing layer is a hollow structure. While the honeycomb structure ensures strength, there is still air inside, which has a temperature insulation effect and ensures that the optical fiber is not affected by temperature.

Fifth, the cold-resistant and shock-absorbing layer is formed by nesting two groups of honeycomb-shaped structures, the outer large regular hexagonal structure has a supporting function, which reduces the heat conduction contact area, and the inner small regular hexagonal structure can ensure The strength of the collision.

Description of drawings

Fig. 1 is the cross-sectional view of the utility model with the micro-bundle optical cable with the anti-cold and shock-absorbing layer.

Fig. 2 is the structural schematic diagram of the cold-resistant and shock-absorbing layer of the micro-bundle optical cable with the cold-resistant and shock-absorbing layer of the utility model.

Fig. 3 is a comparison diagram of the large regular hexagonal outer wall and the small regular hexagonal outer wall of the cold-resistant shock-absorbing layer of the mini-bundle optical cable with the cold-resistant shock-absorbing layer of the utility model.

Legend: 1. Optical fiber; 2. Fiber paste; 3. Loose tube; 4. Central reinforcement; 5. Filling rope; 6. Aramid yarn; 7. Cold and shock-absorbing layer; 8. Outer sheath; 9 1. Large regular hexagonal support structure; 10. Small regular hexagonal support structure; 11. Large regular hexagonal outer wall; 12. Small regular hexagonal outer wall.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific preferred embodiments.

A micro-bundle optical cable with a cold-resistant and shock-absorbing layer is characterized by: comprising a loose tube 3 arranged around a central strengthening member 4 surrounded by a loose tube 3 Closely surrounded by the filling rope 5, the loose tube 3 and the filling rope 5 are fixedly installed in the cold-resistant and shock-absorbing layer 7, and the outer surface of the cold-resistant and shock-absorbing layer 7 is wrapped with an outer sheath 8;

The loose tube 3 is filled with fiber paste 2, and several optical fibers 1 are installed in the fiber paste 2;

The cold-resistant and shock-absorbing layer 7 is composed of an inner wall and an outer wall. Several regular hexagonal brackets are installed between the inner wall and the outer wall to form a large regular hexagonal support structure 9. The inner wall of the large regular hexagonal support structure 9 A small regular hexagonal support structure 10 consisting of small regular hexagonal brackets is installed in each regular hexagonal space, and the large regular hexagonal support structure 9 and the small regular hexagonal support structure 10 are honeycomb-shaped, The direction of the large regular hexagonal outer wall 11 of the large regular hexagonal support structure 9 and the small regular hexagonal outer wall 12 of the small regular hexagonal support structure 10 is the same as the radial direction of the central reinforcement 4 .

In this embodiment, the diameter of the optical fiber 1 is 200 μm, 12 optical fibers 1 are installed in each loose tube 3 , and the outer diameter of the loose tube 3 does not exceed 1.4 mm.

In this embodiment, the space surrounded by the outer wall of the loose tube 3 , the outer wall of the central reinforcement 4 , the outer wall of the filling rope 5 and the inner wall of the cold-resistant and shock-absorbing layer 7 is filled with aramid yarn 5 .

In this embodiment, the central reinforcement 4 is phosphated steel wire.

In this embodiment, the outer sheath 8 is made of high-density polyethylene.

In this embodiment, the height of the small regular hexagonal outer wall 12 is half of the height of the large regular hexagonal outer wall 11 .

In this embodiment, the aramid yarn 5, the loose tube 3 and the filling rope 5 are wrapped with a water-blocking tape, and the outer surface of the water-blocking tape is closely connected with the inner surface of the cold-resistant and shock-absorbing layer.

In this embodiment, the loose tube 2 is a PBT tube, and the number of the loose tube 2 is at least one.

In the present embodiment, optical fiber 1 is the tiny optical fiber of diameter 200 μ m, mainly undertakes the effect of signal transmission, and its main technical index is attenuation 1310nm≤0.35dB/km, 1550nm≤0.21dB/km, bending radius≥4m, PMD PMD ( link value) ≤0.2ps/√km, macro bending loss ≤0.1dB.

In this embodiment, the loose tube 3 is reinforced PBT, and its excess length is controlled by the water temperature and the tension of the take-up and take-off line. At the same time, the reinforced PBT can harden the tube and prevent the tube from being stressed during re-cable production. out of shape.

In this embodiment, the central strength member 4 is mainly to ensure good tensile performance of the optical cable, and is generally phosphated steel wire or FRP.

In this embodiment, the outer sheath 8 is made of HDPE, which is mainly used to protect the internal structure of the optical cable, and at the same time make the appearance of the product round and smooth.

In this embodiment, the fiber paste 2 is mainly filled in the sleeve to ensure the structural size of the sleeve, and its good thixotropy can ensure that the optical fiber is not stressed inside the sleeve.

In this embodiment, the main function of the filling rope 5 is to ensure the roundness of the overall structure of the optical cable.

In this embodiment, the aramid yarn 6 can further ensure the roundness of the overall structure of the optical cable and also play the role of waterproof and water-proof.

In this embodiment, the cold-resistant and shock-absorbing layer 7 is a honeycomb structure. While ensuring the strength, there is still air inside, which has a temperature insulation effect and ensures that the optical fiber is not affected by temperature. The cold-resistant and shock-absorbing layer 7 is composed of Two groups of large and small honeycomb structures are nested, in which the outer large regular hexagonal structure has a supporting function and reduces the heat conduction contact area, and the inner small regular hexagonal structure can ensure the strength during impact.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (5)

1. A micro-bundle optical cable with a cold-resistant and shock-absorbing layer, which is characterized in that it includes a loose tube (3), and the loose tube (3) is arranged around a central reinforcement (4), and the central reinforcement The parts (4) are tightly surrounded by loose tubes (3) and filling ropes (5), and the loose tubes (3) and filling ropes (5) are fixedly installed in the cold-resistant and shock-absorbing layer (7). The outer surface of the cold-resistant and shock-absorbing layer (7) is wrapped with an outer sheath (8); The loose tube (3) is filled with fiber paste (2), and several optical fibers (1) are installed in the fiber paste (2); The cold-resistant and shock-absorbing layer (7) is composed of an inner wall and an outer wall, and a number of regular hexagonal brackets are installed between the inner wall and the outer wall to form a large regular hexagonal support structure (9), and the large regular hexagonal Each regular hexagonal space in the support structure (9) is equipped with a small regular hexagonal support structure (10) composed of small regular hexagonal brackets, the large regular hexagonal support structure (9) and the small regular hexagonal support structure (9) The polygonal support structures (10) are honeycomb-shaped, the large regular hexagonal outer wall (11) of the large regular hexagonal support structure (9) and the small regular hexagonal outer wall (10) of the small regular hexagonal support structure (10) 12) is in the same direction as the radial direction of the central reinforcement (4); The space surrounded by the outer wall of the loose tube (3), the outer wall of the central reinforcement (4), the outer wall of the filling rope (5) and the inner wall of the cold-resistant shock-absorbing layer (7) is filled with aramid yarn (6); The height of the small regular hexagonal outer wall (12) is half of the height of the large regular hexagonal outer wall (11); The aramid yarn (6), the loose tube (3) and the filling rope (5) are wrapped with a water-blocking tape, and the outer surface of the water-blocking tape is closely connected with the inner surface of the cold-resistant and shock-absorbing layer. 2. The micro-bundle optical cable with cold-resistant and shock-absorbing layer according to claim 1, characterized in that: the diameter of the optical fiber (1) is 200 μm, and each of the loose tubes (3) 12 optical fibers (1) are installed, and the outer diameter of the loose tube (3) does not exceed 1.4mm. 3. The micro-bundle optical cable with a cold-resistant and shock-absorbing layer according to claim 1, characterized in that: the central reinforcement (4) is a phosphating steel wire. 4. The micro-bundle optical cable with a cold-resistant and shock-absorbing layer according to claim 1, characterized in that: the outer sheath (8) is made of high-density polyethylene material. 5. The micro-bundle optical cable with cold-resistant and shock-absorbing layer according to claim 1, characterized in that: the loose tube (3) is a PBT tube, and the loose tube (3) Quantity is at least 1 stick.