A high fiber core density anti-rat optical cable

Abstract

The present invention belongs to the field of optical cables, and discloses a rat-proof optical cable with a high fiber core density, which has three insulated wires, a protective tube, multiple fiber ribbons, a skeleton, and an outer sheath. The insulated wire is composed of a conductor and an insulating layer that coats the conductor. The fiber ribbon is composed of multiple optical fibers and an adhesive layer that integrally coats the multiple optical fibers. It is characterized in that: the skeleton is an integral structure, the cross-section of the skeleton is a regular hexagon, and the skeleton is composed of first, second, and third skeleton strips, first, second, and third extension strips, first, second, and third extension bars, and first, second, and third limiting strips. The insulated wires are distributed in the protective tube, the protective tube is located in the central cavity, and fiber ribbons are provided in the first, second, and third skeleton cavities. The outer sheath is coated outside the skeleton. The present invention has the following main beneficial technical effects: higher space utilization rate, easier production, simpler structure, lower cost, better rat-proof performance, more convenient placement, and more stable.

Description

Technical Field

[0001] The present invention belongs to the field of optical cables, and in particular, relates to a rat-proof optical cable with a high fiber core density. Background Art

[0002] In order to enhance rat-proof performance and achieve a higher fiber core density, many studies have been conducted by those skilled in the art, such as the following documents.

[0003] CN216561137U discloses a rat-proof optical cable with an independent support frame, which has an outer sheath, a rat-proof strengthening layer, and a central strengthening member. The rat-proof strengthening layer is located outside the central strengthening member, and the outer sheath is located outside the rat-proof strengthening layer. It is characterized in that a plurality of independent support frames are further provided around the central strengthening member between the central strengthening member and the rat-proof strengthening layer. The independent support frame is composed of a support frame body. Adjacent two independent support frames approach each other, and the approaching part of adjacent two independent support frames recesses inward to form a recessed part. An inner loose tube is provided between adjacent two independent support frames. An inner sheath is provided between the rat-proof strengthening layer and the independent support frame. An outer loose tube is wedged on the independent support frame. At least one optical fiber is provided in the inner loose tube, the outer loose tube, and the inner loose tube. It prevents rats through the rat-proof strengthening layer 3, and the structure is complex.

[0004] CN114077023A discloses a rat-proof optical cable, which has a rat-proof cable core, a protective layer wrapped outside the rat-proof cable core, and an outer sheath located outside the protective layer. It is characterized in that the rat-proof cable core is in a convex hexagonal prism shape, and all the edges are on the same cylindrical surface. The rat-proof cable core is composed of a rat-proof shell, a plurality of fiber ribbons, a first insulated flat wire, and a second insulated flat wire. The rat-proof shell has a special structure. The plurality of fiber ribbons are distributed in the central cavity of the rat-proof shell in a manner of staggered stacking of adjacent layers. The first insulated flat wire is placed in the first accommodation cavity and the second accommodation cavity of the rat-proof shell after being bent. The second insulated flat wire is placed in the third accommodation cavity and the fourth accommodation cavity of the rat-proof shell after being bent. The fiber ribbons are located in the central parallelogram cavity, and the space utilization rate can still be further improved.

[0005] CN209674073U A high-barrier airtight optical cable, comprising an optical fiber located at the center of the optical cable, and a gas barrier layer and an outer sheath layer sequentially arranged outside the optical fiber from the inside to the outside. Several non-metallic reinforcement members are symmetrically arranged in the outer sheath layer. A material for preventing rodent bites is also arranged at a position close to the outer edge in the outer sheath layer, and is filled in the outer sheath layer in a groove shape or implanted into the outer sheath in a fiber mesh shape; the outer sheath layer is a high-density thermoplastic polyethylene flame-retardant layer, and the non-metallic reinforcement member is a Kevlar fiber-reinforced composite material arranged along the length direction of the optical cable; the gas barrier layer is a polymer composite gas barrier layer. The high-performance materials and structural design ensure the strength, bending performance, compression resistance, wear resistance, and aging resistance of the optical cable, while preventing liquids or gases from penetrating into the core layer under high pressure, being chemically corrosion-resistant, and preventing rodent bites, ensuring that communication is not affected by the external environment.

[0006] Therefore, considering a higher core density and better rodent prevention, there is room for further improvement. Summary of the Invention

[0007] To solve the above problems, the object of the present invention is to disclose a rodent-proof optical cable with a high core density, which is achieved by the following technical solutions.

[0008] A high-fiber-core-density anti-rat optical cable, which has three insulated wires, a protective tube, multiple fiber ribbons, a skeleton, and an outer sheath. The insulated wire is composed of a conductor and an insulating layer that coats the conductor. The fiber ribbon is composed of multiple optical fibers and an adhesive layer that coats the multiple optical fibers as a whole. It is characterized in that: the skeleton is an integral structure, the cross-section of the skeleton is a regular hexagon, and the skeleton is composed of a first skeleton strip, a first extension strip, a first extension bar, a first limiting strip, a second skeleton strip, a second extension strip, a second extension bar, a second limiting strip, a third skeleton strip, a third extension strip, a third extension bar, and a third limiting strip. One end of the first skeleton strip is connected to the other end of the second skeleton strip, one end of the second skeleton strip is connected to the other end of the third skeleton strip, one end of the third skeleton strip is connected to the other end of the first skeleton strip. The first extension bar extends from the connection point between one end of the third skeleton strip and the other end of the first skeleton strip. The second extension bar extends from the connection point between one end of the first skeleton strip and the other end of the second skeleton strip. The third extension bar extends from the connection point between one end of the second skeleton strip and the other end of the third skeleton strip. The extending end of the first extension bar is connected to one end of the first extension strip. The extending end of the second extension bar is connected to one end of the second extension strip. The extending end of the third extension bar is connected to one end of the third extension strip. One end of the first limiting strip is connected to the other end of the first extension strip. One end of the second limiting strip is connected to the other end of the second extension strip. One end of the third limiting strip is connected to the other end of the third extension strip. A first opening is formed between the other end of the first limiting strip and one end of the first skeleton strip. A second opening is formed between the other end of the second limiting strip and one end of the second skeleton strip. A third opening is formed between the other end of the third limiting strip and one end of the third skeleton strip. The internal space enclosed by the first skeleton strip, the second skeleton strip, and the third skeleton strip is a central cavity, and the cross-section of the central cavity is an equilateral triangle. The first extension strip is parallel to the first skeleton strip and a first skeleton cavity is formed between them. The second extension strip is parallel to the second skeleton strip and a second skeleton cavity is formed between them. The third extension strip is parallel to the third skeleton strip and a third skeleton cavity is formed between them. The cross-sections of the first skeleton cavity, the second skeleton cavity, and the third skeleton cavity are all isosceles trapezoids. The three insulated wires are distributed in the protective tube in a pairwise tangent manner. The protective tube is located in the central cavity. There are fiber ribbons in the first skeleton cavity, the second skeleton cavity, and the third skeleton cavity. The outer sheath is coated outside the skeleton.

[0009] For the above-mentioned high-fiber-core-density anti-rat optical cable, it is characterized in that: there is no protective tube, and the three insulated wires are distributed in the central cavity in a pairwise tangent manner.

[0010] For the above-mentioned high-fiber-core-density anti-rat optical cable, it is characterized in that: the insulated wire is replaced by a loose tube, and the loose tube is composed of a loose tube body and multiple optical fibers located in the loose tube body.

[0011] The present invention has the following main beneficial technical effects: higher space utilization rate, easier production, simpler structure, lower cost, better rodent-proof performance, more convenient placement, and higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of an opened-up part of Embodiment 1 of the present invention.

[0013] Figure 2 is Figure 1 an enlarged front view structural schematic diagram.

[0014] Figure 3 is Figure 1 a three-dimensional structural schematic diagram of a section of the skeleton used therein.

[0015] Figure 4 is Figure 3 an enlarged front view structural schematic diagram.

[0016] Figure 5 It is a cross-sectional structural schematic diagram of Embodiment 2.

[0017] Figure 6 It is a cross-sectional structural schematic diagram of Embodiment 3.

[0018] In the figure: 1 - insulated wire, 2 - protection tube, 3 - fiber ribbon, 4 - skeleton, 5 - outer sheath, 6 - loose tube, 11 - conductor, 12 - insulating layer, 31 - optical fiber, 32 - bonding layer, 40 - central cavity, 41 - first skeleton strip, 410 - first skeleton cavity, 411 - first extension strip, 4100 - first opening, 4111 - first extension bar, 4112 - first limiting bar, 42 - second skeleton strip, 420 - second skeleton cavity, 421 - second extension strip, 4200 - second opening, 4211 - second extension bar, 4212 - second limiting bar, 43 - third skeleton strip, 430 - third skeleton cavity, 431 - third extension strip, 4300 - third opening, 4311 - third extension bar, 4312 - third limiting bar, 61 - optical fiber, 62 - loose tube body. DETAILED DESCRIPTION OF THE INVENTION

[0019] Embodiment 1

[0020] Please refer to Figures 1 to 4 , a high-fiber-core density rodent-proof optical cable, which has three insulated wires 1, a protection tube 2, multiple fiber ribbons 3, a skeleton 4, and an outer sheath 5. The insulated wire 1 is composed of a conductor 11 and an insulating layer 12 that coats the conductor. The fiber ribbon 3 is composed of multiple optical fibers 31 and a bonding layer 32 that integrally coats the multiple optical fibers 31; it is characterized in that:

[0021] The skeleton 4 is of an integral structure. The cross-section of the skeleton 4 is a regular hexagon. The skeleton 4 is composed of a first skeleton bar 41, a first extension bar 411, a first extension strip 4111, a first limiting bar 4112, a second skeleton bar 42, a second extension bar 421, a second extension strip 4211, a second limiting bar 4212, a third skeleton bar 43, a third extension bar 431, a third extension strip 4311, and a third limiting bar 4312. One end of the first skeleton bar 41 is connected to the other end of the second skeleton bar 42. One end of the second skeleton bar 42 is connected to the other end of the third skeleton bar 43. One end of the third skeleton bar 43 is connected to the other end of the first skeleton bar 41. The first extension strip 4111 extends from the connection between one end of the third skeleton bar 43 and the other end of the first skeleton bar 41. The second extension strip 4211 extends from the connection between one end of the first skeleton bar 41 and the other end of the second skeleton bar 42. The third extension strip 4311 extends from the connection between one end of the second skeleton bar 42 and the other end of the third skeleton bar 43. The extending end of the first extension strip 4111 is connected to one end of the first extension bar 411. The extending end of the second extension strip 4211 is connected to one end of the second extension bar 421. The extending end of the third extension strip 4311 is connected to one end of the third extension bar 431. One end of the first limiting bar 4112 is connected to the other end of the first extension bar 411. One end of the second limiting bar 4212 is connected to the other end of the second extension bar 421. One end of the third limiting bar 4312 is connected to the other end of the third extension bar 431. A first opening 4100 is formed between the other end of the first limiting bar 4112 and one end of the first skeleton bar 41. A second opening 4200 is formed between the other end of the second limiting bar 4212 and one end of the second skeleton bar 42. A third opening 4300 is formed between the other end of the third limiting bar 4312 and one end of the third skeleton bar 43. The internal space enclosed by the first skeleton bar 41, the second skeleton bar 42, and the third skeleton bar 43 is a central cavity 40. The cross-section of the central cavity 40 is an equilateral triangle. The first extension bar 411 is parallel to the first skeleton bar 41 and a first skeleton cavity 410 is formed therebetween. The second extension bar 421 is parallel to the second skeleton bar 42 and a second skeleton cavity 420 is formed therebetween. The third extension bar 431 is parallel to the third skeleton bar 43 and a third skeleton cavity 430 is formed therebetween. The cross-sections of the first skeleton cavity 410, the second skeleton cavity 420, and the third skeleton cavity 430 are all isosceles trapezoids;

[0022] Three insulated wires 1 are distributed in the protection tube 2 in a pairwise tangent manner. The protection tube 2 is located in the central cavity 40. Optical fiber ribbons 3 are provided in the first skeleton cavity 410, the second skeleton cavity 420, and the third skeleton cavity 430. The outer sheath 5 is coated outside the skeleton 4.

[0023] In this embodiment, the cross-sections of the optical fiber ribbons in the first skeleton cavity 410, the second skeleton cavity 420, and the third skeleton cavity 430 are all isosceles trapezoids matching them, which can accommodate more optical fibers / optical waveguides inside, and at the same time make the optical fiber density in the optical fiber ribbon higher.

[0024] Embodiment 2

[0025] Please refer to Figure 5 , and refer to Figures 1 to 4 , a rat-proof optical cable with a high fiber core density, which is basically the same as Embodiment 1, except that: there is no protective tube 2, and three insulated wires 1 are distributed in the central cavity 40 in a pairwise tangent manner.

[0026] Embodiment 3

[0027] Please refer to Figure 6 , and refer to Figures 1 to 5 , a rat-proof optical cable with a high fiber core density, which is basically the same as Embodiment 2, except that: the insulated wire 1 is replaced by a loose tube 6, and the loose tube 6 is composed of a loose tube body 62 and multiple optical waveguides 61 located inside the loose tube body 62.

[0028] For a rat-proof optical cable with a high fiber core density described in this application, it is characterized in that the material of the protective tube 2 is glass fiber reinforced plastic or steel strip or aluminum strip or copper strip.

[0029] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the material of the skeleton 4 is metal or plastic with a rat bite prevention function.

[0030] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the material of the outer sheath 5 is metal or plastic with a rat bite prevention function.

[0031] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the material of the conductor 11 is copper or aluminum or alloy.

[0032] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the material of the insulating layer 12 is plastic.

[0033] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the type of the optical fiber 31 is single-mode or multi-mode.

[0034] For a rat-proof optical cable with a high fiber core density described in any of the above embodiments, it is characterized in that the material of the bonding layer 32 is plastic.

[0035] For a rat-proof optical cable with a high fiber core density described in this application, it is characterized in that the type of the optical waveguide 61 is single-mode or multi-mode.

[0036] A kind of anti-rat optical cable with a high fiber core density described in this application is characterized in that the material of the loose tube body 62 is plastic.

[0037] A kind of anti-rat optical cable with a high fiber core density described in this application is characterized in that the model of the optical fiber 31 is G.652 or G.655 or G.657 or A1a or A1b.

[0038] In this application, the protection tube 2, the skeleton 4, the outer sheath 5, etc. all have the anti-rat function, so the anti-biting performance of the optical cable is greatly improved; in addition, the reasonable distribution of the fiber ribbon makes the core density of the optical fibers in the optical cable higher. In this application, due to the existence of the loose tube, the capacity of the optical fibers is further expanded; the existence of the insulated wire enables the simultaneous transmission of three-phase electricity, realizing multiple functions in one cable; the existence of the first to third extension strips and the formation of three openings make it convenient to take in or put out the fiber ribbon; it makes production, inspection, and construction more convenient. At the same time, if there is partial damage, etc., replacement is faster and more convenient; in this application, the sizes of the first opening, the second opening, and the third opening are all smaller than the thickness of a single fiber ribbon. In this way, under normal circumstances, the fiber ribbon will not escape from the opening. However, as long as the extension strip is gently lifted, the fiber ribbon inside can be taken out. And due to the elasticity of the extension strip, after being pressed down, it can still block the fiber ribbon. Therefore, it is very convenient to use; in this application, the actual occupied cross-sectional area of the solid part of the skeleton 4 can be very small, only accounting for 5-10% of the overall cross-sectional area of the skeleton 4. In this way, the space area is utilized to the greatest extent, making the utilization rate of the optical fiber / conductor higher; in this application, as long as the skeleton 4 has sufficient anti-rat ability, the outer sheath 5 is not required; moreover, the outer shapes of the outer sheath 5 / skeleton 4 are both regular hexahedrons, so they can be placed on a plane relatively casually without rolling, and the material consumption is saved compared with the optical cable with a circular cross-section.

[0039] In this application, the cross-section of the fiber ribbon is trapezoidal, which can better / maximize the utilization of space.

[0040] As a further improvement, in Embodiment 1, there may be no insulated wire 1 in the protection tube 2, but a fiber ribbon is placed in the space inside the protection tube 2. The cross-section of the fiber ribbon is an equilateral triangle, and the edge of the fiber ribbon is in close contact with the inner wall of the protection tube 2. The fiber ribbon is composed of multiple optical fibers 61 as in Embodiment 3 and a bonding layer that coats all the optical fibers 61. The material of the bonding layer is an ultraviolet curing material, such as the main material is polyacrylate resin, and an ultraviolet light sensitizer and an ultraviolet light curing agent are added inside; of course, it may not be a fiber ribbon, and loose optical fibers can be used instead. In this way, the space utilization efficiency inside the protection tube 2 is higher; in addition, the fiber ribbon can also be one or more fiber bundles, and the fiber bundle is composed of multiple optical fibers 61 and a yarn that wraps the optical fibers 61.

[0041] Further, in the above embodiments, the optical fiber ribbon in the first, second, and third skeleton cavities may also be composed of a strip-shaped object with anti-biting function. The strip-shaped object fills the first, second, and third skeleton cavities. The material of the strip-shaped object with anti-biting function can be steel, iron, or alloy, or it can be non-metallic, such as glass fiber reinforced plastic tape, aramid yarn mesh, steel wire mesh, etc., which can greatly improve the anti-biting performance.

[0042] Therefore, the present invention has the following main beneficial technical effects: higher space utilization rate, easier production, simpler structure, lower cost, better anti-rat performance, more convenient placement, and more stable.

[0043] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A high-core-density rodent-proof optical cable comprising three insulated conductors (1), a protective tube (2), a plurality of optical fiber ribbons (3), a skeleton (4), and an outer sheath (5), wherein the insulated conductors (1) are composed of a conductor (11) and an insulating layer (12) covering the conductor, and the optical fiber ribbon (3) is composed of a plurality of optical fibers (31) and an adhesive layer (32) covering the plurality of optical fibers (31) as a whole; and characterized in that: The said framework (4) is of an integral structure. The cross-section of the framework (4) is a regular hexagon. The framework (4) is composed of a first framework bar (41), a first extension bar (411), a first extension strip (4111), a first limiting bar (4112), a second framework bar (42), a second extension bar (421), a second extension strip (4211), a second limiting bar (4212), a third framework bar (43), a third extension bar (431), a third extension strip (4311), and a third limiting bar (4312). One end of the first framework bar (41) is connected to the other end of the second framework bar (42), one end of the second framework bar (42) is connected to the other end of the third framework bar (43), one end of the third framework bar (43) is connected to the other end of the first framework bar (41). The first extension strip (4111) extends from the connection between one end of the third framework bar (43) and the other end of the first framework bar (41). The second extension strip (4211) extends from the connection between one end of the first framework bar (41) and the other end of the second framework bar (42). The third extension strip (4311) extends from the connection between one end of the second framework bar (42) and the other end of the third framework bar (43). The extending end of the first extension strip (4111) is connected to one end of the first extension bar (411). The extending end of the second extension strip (4211) is connected to one end of the second extension bar (421). The extending end of the third extension strip (4311) is connected to one end of the third extension bar (431). One end of the first limiting bar (4112) is connected to the other end of the first extension bar (411). One end of the second limiting bar (4212) is connected to the other end of the second extension bar (421). One end of the third limiting bar (4312) is connected to the other end of the third extension bar (431). A first opening (4100) is formed between the other end of the first limiting bar (4112) and one end of the first framework bar (41). A second opening (4200) is formed between the other end of the second limiting bar (4212) and one end of the second framework bar (42). A third opening (4300) is formed between the other end of the third limiting bar (4312) and one end of the third framework bar (43). The internal space enclosed by the first framework bar (41), the second framework bar (42), and the third framework bar (43) is a central cavity (40). The cross-section of the central cavity (40) is an equilateral triangle. The first extension bar (411) is parallel to the first framework bar (41) and a first framework cavity (410) is formed between them. The second extension bar (421) is parallel to the second framework bar (42) and a second framework cavity (420) is formed between them. The third extension bar (431) is parallel to the third framework bar (43) and a third framework cavity (430) is formed between them. The cross-sections of the first framework cavity (410), the second framework cavity (420), and the third framework cavity (430) are all isosceles trapezoids;Three insulated wires (1) are distributed in the protection tube (2) in a pairwise tangent manner. The protection tube (2) is located in the central cavity (40). Optical fiber ribbons (3) are provided in the first skeleton cavity (410), the second skeleton cavity (420), and the third skeleton cavity (430). The outer sheath (5) covers the outside of the skeleton (4). The optical fiber (31) is of the type G.652 or G.655 or G.657 or A1a or A1b.; 2. The high-fiber-core-density anti-rat optical cable according to claim 1, wherein The material of the protective tube (2) is fiberglass reinforced plastic or steel strip or aluminum strip or copper strip.

3. A high-fiber-core-density anti-rat optical cable according to claim 1 or claim 2, characterized in that The material of the conductor (11) is copper or aluminum or alloy.

4. The high-fiber-core-density anti-rat optical cable according to claim 3, characterized in that The material of the insulating layer (12) is plastic.

5. A rat-proof optical cable with a high fiber core density according to claim 4, characterized in that: There is no protective tube (2), and three insulated wires (1) are distributed in the central cavity (40) in a pairwise tangent manner.

6. The high-fiber-core-density anti-rat optical cable according to claim 5, characterized in that: The insulated wire (1) is replaced by a loose tube (6), and the loose tube (6) is composed of a loose tube body (62) and multiple optical fibers (61) located within the loose tube body (62).

7. The high-fiber-core-density anti-rat optical cable according to claim 5, characterized in that The type of the optical fiber (61) is single mode or multi mode.

8. A rat-proof optical cable with a high fiber core density according to claim 7, characterized in that The material of the loose tube body (62) is plastic.

9. The high-fiber-core-density anti-rat optical cable according to claim 8, characterized in that The material of the skeleton (4) is metal or plastic with a function of preventing rat bites.

10. The high-fiber-core-density anti-rat optical cable according to claim 9, characterized in that The material of the outer sheath (5) is metal or plastic with a function of preventing rat bites.

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