CN211043753U - High-low temperature resistant remote optical cable - Google Patents

Abstract

The utility model discloses an optical cable is drawn far to resistant high low temperature, including the cable core and cladding in proper order in the cable core outside in enhancement layer, interior sheath, outer reinforcement layer and outer jacket, inlay in the interior sheath and be equipped with three piece at least inlayer non-metallic reinforcements, inlayer non-metallic reinforcements circumference evenly distributed is in the interior sheath, inlay in the outer jacket and be equipped with the outer non-metallic reinforcements the same with inlayer non-metallic reinforcements quantity, outer non-metallic reinforcements sets up the cable core with on the extension cord of inlayer non-metallic reinforcements, the surface of inlayer non-metallic reinforcements and outer non-metallic reinforcements all is provided with the rubber coating layer. The utility model is suitable for an indoor outer communication base station's transmission scene can satisfy and use under high microthermal condition, has good tensile and anti side pressure characteristic simultaneously.

Description

High-low temperature resistant remote optical cable

Technical Field

The utility model relates to an optical cable makes technical field, concretely relates to resistant high low temperature optical cable of zooming out.

Background

With the rapid development of communication technology, the traditional cable communication technology is slowly replaced by the optical fiber communication technology due to the self limitation, and the physical channel of transmission is correspondingly converted from the cable to the optical cable; the optical fiber remote is generated along with the radio frequency remote and the optical fiber repeater technology, and the remote of the baseband signal and the radio frequency signal is realized through the excellent transmission characteristic of the optical fiber, so that the site selection of a base station and the installation of an antenna feeder are facilitated, carrier frequency resources can be reasonably utilized, and the optical fiber remote is a technology which develops rapidly in recent years; the remote optical cable is applied between the RRU (radio remote unit) and the BBU (base band processing unit) to realize data transmission between the RRU and the BBU.

With the continuous development of mobile communication networks, common 2-core and 4-core remote optical cables cannot meet the general requirements of multiple scenes, and in the 5G network era which is about to be fully developed, 5G communication base stations are densely deployed, so that a fronthaul network becomes a key path for connecting base Stations (AAUs). According to market research, currently, a 5G base station forward transmission path needs 6-24 core optical fibers, and one BBU/DU is considered to be connected with 3-12 AAUs. With the increase of AAU, the use number of the optical cables is increased, and the large-core-number bunched environment-resistant optical cable is more suitable for use in consideration of the problems of repeated construction cost and the like and construction difficulty in remote areas or severe environments.

Particularly, under the condition of low temperature, the sheath material of the optical cable has strong shrinkage performance, and the optical fiber cannot shrink, so that the excess length of the optical fiber in the optical cable is too large, the optical fiber is easy to bend and fold in the optical cable, the additional attenuation of the optical fiber is improved, and the transmission performance of the optical fiber is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an optical cable is pulled far to resistant high low temperature is applicable to the transmission scene of indoor outer communication base station, can satisfy and use under high microthermal condition, has good tensile and anti side pressure characteristic simultaneously.

In order to solve the technical problem, the utility model provides an optical cable is far away to resistant high low temperature, include the cable core and cladding interior enhancement layer, interior sheath, outer reinforcement layer and the outer sheath outside the cable core in proper order, inlay in the interior sheath and be equipped with three at least inlayer nonmetal reinforcements, inlayer nonmetal reinforcement circumference evenly distributed is in the interior sheath, it is equipped with the outer nonmetal reinforcement the same with inlayer nonmetal reinforcement quantity to inlay in the outer sheath, outer nonmetal reinforcement sets up the cable core with on the extension line of inlayer nonmetal reinforcement, the surface of inlayer nonmetal reinforcement and outer nonmetal reinforcement all is provided with the rubber coating.

The utility model discloses a preferred embodiment, further include the cable core is the unit tied in a bundle that 2 ~ 24 optical fiber unit formed through the coating tied in a bundle.

In a preferred embodiment of the present invention, the optical fiber unit is a colored optical fiber or a tight-buffered optical fiber.

In a preferred embodiment of the present invention, the optical fiber unit further comprises an extra length of-0.2% -0.

In a preferred embodiment of the present invention, the non-metal reinforcing member disposed in the inner protective layer and the outer protective layer is less than 0.4mm from the wall thickness of both sides of the inner protective layer and the outer protective layer.

In a preferred embodiment of the present invention, the inner reinforcement layer and the outer reinforcement layer are formed by a plurality of aramid fibers.

In a preferred embodiment of the present invention, the outer sheath is wrapped by the extruded tube and the inner sheath is wrapped by the extruded tube.

In a preferred embodiment of the present invention, the inner sheath and the outer sheath are made of low smoke halogen-free flame retardant sheath material.

In a preferred embodiment of the present invention, the optical fiber unit in step S1 is a colored optical fiber with a colored bare fiber or a tightly-wrapped optical fiber with a wrapped bare fiber.

The utility model has the advantages that:

1. the utility model discloses an optical cable is pulled far away to resistant high low temperature adopts the nonmetal reinforcement that has the rubber coating to inlay including in sheath and the outer jacket, can improve nonmetal reinforcement and interior sheath, the cohesive force between the outer jacket through the rubber coating, can restrain interior sheath, the outer jacket is shrink under microthermal condition, improve the low temperature resistance performance of optical cable, adopt low smoke and zero halogen fire-retardant sheath material, improve the high temperature resistance performance of optical cable, and, through setting up the anti side pressure ability and the tensile strength that nonmetal reinforcement improved the optical cable.

2. The utility model discloses an inlay the position correspondence setting of the outer nonmetal reinforcement of establishing in the nonmetal reinforcement of inner strata and the outer jacket of establishing in the inner sheath, the optical cable of being convenient for is crooked at the in-process of hanging wall and construction.

Drawings

Fig. 1 is a schematic structural view of the high and low temperature resistant remote optical cable of the present invention;

fig. 2 is a flow chart of the production process of the high and low temperature resistant remote optical cable of the present invention;

the reference numbers in the figures illustrate: 1. a cable core; 2. an optical fiber unit; 3. a bundling unit; 4. an inner reinforcing layer; 5. an inner protective layer; 6. an inner non-metallic reinforcement; 7. a reinforcing layer is added; 8. an outer jacket; 9. an outer layer non-metallic reinforcement; 10. and (7) gluing layers.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1-2, an embodiment of the high and low temperature resistant remote optical cable of the present invention includes a cable core 1, and an inner reinforcement layer 4, an inner reinforcement layer 5, an outer reinforcement layer 7 and an outer reinforcement layer 8 sequentially covering the cable core 1, wherein three inner non-metal reinforcement members 6 are embedded in the inner reinforcement layer 5, the inner non-metal reinforcement members 6 are circumferentially and uniformly distributed in the inner reinforcement layer 5, in this embodiment, the three inner non-metal reinforcement members 6 are connected to form a regular triangle structure, outer non-metal reinforcement members 9 having the same number as the inner non-metal reinforcement members 6 are embedded in the outer reinforcement layer 8, the outer non-metal reinforcement members 9 are disposed on extension wires of the cable core 1 and the inner non-metal reinforcement members 6, outer surfaces of the inner non-metal reinforcement members 6 and the outer non-metal reinforcement members 9 are both provided with a glue coating layer 10, and in the process of covering the outer reinforcement layer 8 or the inner reinforcement layer 5, the high-temperature sheath material melts the glue coating layer 10, the adhesive force between the nonmetal reinforcing piece and the inner protection layer 5 and the outer protection layer 8 can be improved through the glue coating layer 10, the inner protection layer 5 and the outer protection layer 8 can be restrained from shrinking under the low-temperature condition, and the low-temperature resistance of the optical cable is improved; the inner sheath layer 5 and the outer sheath layer 8 in the embodiment are both made of low-smoke halogen-free flame-retardant sheath materials, and the low-smoke halogen-free flame-retardant sheath materials have the advantages of high flame retardance, low shrinkage, low temperature resistance, high temperature resistance, corrosion resistance, sunlight irradiation resistance, aging resistance, cracking resistance, environmental friendliness, uniform color, suitable hardness, easiness in processing, bending resistance, high thin-wall processing, strength, rat bite prevention, low cost price and the like, and are suitable for being used under conditions of high and low temperature and complex environment.

In this embodiment, three outer non-metal reinforcement 9 are connected and also are constituted regular triangle structure, two regular triangle structure's orientation angle is the same, the optical cable of being convenient for is crooked at hanging wall or work progress like this, in-process at the optical cable hanging wall, need to wind the optical cable on the wooden dish, if inner non-metal reinforcement 6 is different with the position of outer non-metal reinforcement 9, the optical cable is different at the internal stress, the optical cable of being not convenient for is crooked to a direction, just can't wind the optical cable on the wooden dish, in order to guarantee to make outer non-metal reinforcement 9 set up on the extension line of being connected of unit 3 and inner non-metal reinforcement 6 tied in a bundle, adopt the accent eccentric mould of exempting from in the oversheath technology of this embodiment, can fix the position of outer non.

Specifically, the cable core 1 is a bundling unit 3 formed by bundling and coating 2-24 optical fiber units 2, the optical fiber units 2 are bundled by the bundling unit 3, the high-density use requirement can be met, the number of the optical fiber units 2 is increased, the duty ratio of the optical fiber units 2 in the optical cable is improved, and a bundling layer in the bundling unit 3 can also play a certain role in protecting the optical fiber units 2.

Specifically, the optical fiber units 2 are colored optical fibers or tight-buffered optical fibers, wherein the colored optical fibers are formed by coating a layer of colored ink on the outer sides of bare optical fibers, the optical fiber units 2 are colored according to standard color spectrums (blue, orange, green, brown, gray, white, red, black, yellow, purple, pink and turquoise) of the optical fibers, the tight-buffered optical fibers can provide more layers of protection for the optical fibers, and the tight-buffered optical fibers can be L SZH or nylon materials.

Specifically, the extra length of the optical fiber unit 2 is negative extra length of-0.2% -0, and since the optical fiber unit 2 has certain stretchability, in the process of coating the inner sheath 5 outside the optical fiber unit 2, the paying-off tension of the optical fiber unit 2 is adjusted, so that the optical fiber unit 2 has zero extra length or small negative extra length in the inner sheath 5, and thus when the optical cable contracts from the inner sheath 5 to the outer sheath 8 in a low-temperature environment, the optical fiber unit 2 can become positive extra length to the inner sheath 5 and the outer sheath 8, and the optical fiber unit 2 is prevented from being accumulated in the cable core 1, so that additional attenuation loss is caused.

Because the optical cable laying distance that zooms out is longer, need the thickness of minimize sheath to reduce the external diameter and the self weight of optical cable, specifically, the non-metal reinforcement that sets up in inner sheath 5 and outer jacket 8 all is less than 0.4mm apart from the wall thickness of inner sheath 5 and outer jacket 8 both sides, also prevents the condition of impression or inlayer brokenly on the sheath surface simultaneously.

Specifically, the inner reinforcing layer 4 and the outer reinforcing layer 7 are formed by vertically placing a plurality of aramid fibers, the aramid fibers have the advantages of small density, high tensile modulus, high breaking strength, low breaking elongation and high corrosion resistance, are non-conductive, have high chemical resistance except for strong acid and strong alkali, and further enhance the tensile property of the optical cable through the inner reinforcing layer 4 and the outer reinforcing layer 7 formed by the aramid fibers.

Specifically, 8 crowded pipe cladding of outer jacket are in the 5 outsides of interior sheath, outer jacket 8 with leave the clearance between the 5 interior sheaths, adopt crowded pipe mould to replace extrusion die in the mould selection, prevent that outer jacket 8 from tightly wrapping the outside of inner sheath 5, through setting up the space, can prevent on the one hand that outer jacket 8 is at crowded in-process of wrapping, extrude aramid fiber, cause aramid fiber's piling up, on the other hand, outer jacket 8 and interior sheath 5 can not bond together, when the low temperature shrink, can not shrink in step.

Specifically, the crowded pipe cladding of inner sheath 5 is in the 1 outside of cable core, adopts crowded pipe mould to replace extrusion die in the mould selection, prevents that inner sheath 5 from causing the extrusion to cable core 1.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims (8)

1. The utility model provides an optical cable of zooming out of resistant high low temperature, a serial communication port, include the cable core and cladding in proper order at the outer interior enhancement layer of cable core, interior sheath, outer reinforcement layer and outer jacket, it is equipped with three at least inlayer non-metallic reinforcement to inlay in the interior sheath, the non-metallic reinforcement circumference evenly distributed of inlayer is in the interior sheath, it is equipped with the outer non-metallic reinforcement the same with the non-metallic reinforcement quantity of inlayer to inlay in the outer jacket, outer non-metallic reinforcement sets up the cable core with on the extension line of the non-metallic reinforcement of inlayer, the surface of the non-metallic reinforcement of inlayer and outer non-metallic reinforcement all is provided with the rubber coating.

2. The high and low temperature resistant remote optical cable according to claim 1, wherein the cable core is a bundling unit formed by bundling and coating 2-24 optical fiber units.

3. The high and low temperature resistant remote fiber optic cable of claim 2, wherein the optical fiber unit is a colored optical fiber or a tight-buffered optical fiber.

4. The high and low temperature resistant remote optical cable according to claim 2, wherein the excess length of the optical fiber unit is-0.2% to 0%.

5. The high and low temperature resistant optical fiber cable of claim 1, wherein the non-metallic strength members disposed in the inner and outer sheaths have a wall thickness less than 0.4mm from both sides of the inner and outer sheaths.

6. The high and low temperature resistant optical remote cable according to claim 1, wherein the inner reinforcing layer and the outer reinforcing layer are each formed by a plurality of aramid fibers laid straight.

7. The high and low temperature resistant optical remote cable according to claim 1, wherein the outer sheath extrusion is coated outside the inner sheath, and a gap is left between the outer sheath and the inner sheath.

8. The high and low temperature resistant optical remote cable according to claim 1, wherein the inner sheath and the outer sheath are made of a low smoke zero halogen flame retardant sheath material.

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