Layer-stranded optical cable capable of long-distance transmission

Abstract

The invention belongs to the field of optical cables, and particularly discloses a layer-stranded optical cable capable of long-distance transmission, which comprises an outer protective layer and a cable core, the cable core comprises a central reinforcing piece and at least three optical units stranded around the central reinforcing piece, each optical unit comprises two butterfly-shaped units and two protective strips, optical fibers are arranged in the butterfly-shaped units in the same cross section, and the protective strips are arranged on the outer protective layer. The two optical units are connected, the two protection strips are connected with the two left ends and the two right ends of the two butterfly-shaped units respectively, a fiber containing cavity is formed between the protection strips and the two butterfly-shaped units, and at least one optical fiber is arranged in the fiber containing cavity; the cable has the advantages of being better in mechanical performance, suitable for long-distance transmission, wide in laying scene application range, convenient to strip and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of optical cables, and particularly discloses a layer-stranded optical cable capable of long-distance transmission. BACKGROUND

[0002] As the most used optical cable, the layer-stranded optical cable (such as GYTA, GYTS, GYTY, etc.) is widely used in various application scenarios.

[0003] In the prior art, CN119846794A discloses a layer-stranded optical cable, which comprises optical fibers, a loose tube, a counterweight, a sleeve and a sheath.

[0004] The above prior art has the following defects: 1. The sleeve has poor tensile and compression resistance, and when laid over a long distance, the transmission performance of the optical fibers is easily affected, and the loose tube is easily deformed under pressure, affecting the transmission performance of the fibers; 2. It can only be used for outdoor laying; and 3. The loose tube is inconvenient to open and peel. SUMMARY

[0005] To solve the above problems, the application aims to disclose a layer-stranded optical cable capable of long-distance transmission, which is achieved by the following technical scheme.

[0006] A layer-stranded optical cable capable of long-distance transmission comprises an outer sheath and a cable core, and the cable core comprises a central reinforcing member and at least three optical units, and the optical units are stranded around the central reinforcing member. The optical unit comprises two butterfly units arranged symmetrically above and below and two protection strips arranged symmetrically left and right, in the same cross section, the butterfly unit comprises a butterfly unit sheath, two first reinforcing members and at least one optical fiber, the first reinforcing members and the optical fiber are located in the butterfly unit sheath, the two first reinforcing members are arranged left and right, the optical fiber is located between the two first reinforcing members, the outer edge of the butterfly unit sheath comprises a first arc segment and a second arc segment corresponding to the joint of the end, the arc openings of the first arc segment and the second arc segment are opposite, and the two optical units are connected. The upper end of the left protection strip is connected to the left end of the upper butterfly unit, the lower end of the left protection strip is connected to the left end of the lower butterfly unit, the upper end of the right protection strip is connected to the right end of the upper butterfly unit, the lower end of the right protection strip is connected to the right end of the lower butterfly unit, and the first arc segments of the two butterfly units and the outer sides of the two protection strips are located on the same circumference. A fiber-containing cavity is formed between the protection strip and the two butterfly units, and at least one optical fiber is arranged in the fiber-containing cavity.

[0007] The layer-stranded optical cable with long-distance transmission has a protection strip and a butterfly-shaped unit jacket integrally formed.

[0008] The layer-stranded optical cable with long-distance transmission has a tear opening on the first arc-shaped section of the upper butterfly-shaped unit and the lower butterfly-shaped unit, which facilitates stripping of the butterfly-shaped unit jacket and removal of the internal optical fibers.

[0009] The layer-stranded optical cable with long-distance transmission has two intersection points between the second arc-shaped section of the upper butterfly-shaped unit and the second arc-shaped section of the lower butterfly-shaped unit.

[0010] The layer-stranded optical cable with long-distance transmission has a square central hole between the two butterfly-shaped units, which is located in the middle of the two tear openings.

[0011] The layer-stranded optical cable with long-distance transmission has two non-adjacent corners of the central hole, which are respectively opposite to the corresponding tear openings.

[0012] The layer-stranded optical cable with long-distance transmission has two other non-adjacent corners of the central hole, which are respectively opposite to the corresponding fiber-containing cavities.

[0013] The layer-stranded optical cable with long-distance transmission has at least one optical fiber between the central hole and the fiber-containing cavity.

[0014] The layer-stranded optical cable with long-distance transmission has at least one optical fiber in the central hole.

[0015] The layer-stranded optical cable with long-distance transmission has the two ends of the opening of the tear opening of the optical unit abutting against the side wall of the central reinforcing member.

[0016] The layer-stranded optical cable with long-distance transmission has polyethylene or nylon or polyvinyl chloride as the material of the outer jacket.

[0017] The layer-stranded optical cable with long-distance transmission has G652 or G657 as the type of the optical fiber.

[0018] The layer-stranded optical cable with long-distance transmission has an armor layer between the outer jacket and the cable core.

[0019] The layer-stranded optical cable with long-distance transmission has an aluminum tape or a corrugated steel tape or a water-blocking tape as the armor layer.

[0020] The layer-stranded optical cable with long-distance transmission has a phosphorized steel wire as the first reinforcing member.

[0021] The application has the following beneficial effects: 1. Four first reinforcing members are arranged in the optical unit, which enhances the tensile strength of the optical unit and the whole optical cable, and the first reinforcing members and the central reinforcing member are more reasonably distributed in the optical cable, so that the optical cable is more suitable for long-distance overhead laying, the optical unit is not easy to deform during long-distance overhead laying, and the transmission performance of the optical fiber in the optical unit, especially the optical fiber in the fiber cavity, is less affected.

[0022] 2. The two butterfly unit sheaths in the optical unit can support the shape of the optical unit and prevent it from deforming, and compared with the traditional loose tube structure optical cable, the optical cable is more suitable for long-distance overhead laying and has better compression resistance.

[0023] 3. The optical unit has both the inner cavity (fiber cavity) of the ordinary loose tube and the butterfly unit that can be used for indoor laying, so it can meet both outdoor and indoor laying requirements.

[0024] 4. The square central hole and the tear opening can facilitate peeling off the optical fiber in the butterfly unit from the tear opening and then peeling off the optical fiber in the fiber cavity from the corner of the square central hole on one side of the fiber cavity.

[0025] 5. The optical fiber is arranged between the central hole and the fiber cavity, which can increase the number of optical fibers in the optical unit and facilitate the peeling of the optical fiber, 6. The square central hole also has a buffering effect, when peeling off the butterfly unit on one side from the tear opening on the side, due to the presence of the central hole, the other butterfly unit will not be damaged at once.

[0026] 7. The central hole can also accommodate optical fibers, further increasing the number of optical fibers in the optical unit, and since the central hole is located at the center of the optical unit, the optical fibers in the central hole are best protected and can be used for critical line transmission. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective structural schematic diagram of a section of embodiment 1 of the present application.

[0028] Figure 2 is a front view of embodiment 1 of the present application.

[0029] Figure 3 is a perspective structural schematic diagram of the optical unit of embodiment 1 of the present application.

[0030] Figure 4 is a front view of the optical unit of embodiment 1 of the present application.

[0031] Figure 5 is a perspective structural schematic diagram of the optical unit of embodiment 2 of the present application.

[0032] Figure 6 is a front view of the optical unit of embodiment 2 of the present application.

[0033] Figure 7 is a perspective view of the optical unit of embodiment 3 of the present application.

[0034] Figure 8 is a front view of the optical unit of embodiment 3 of the present application.

[0035] Figure 9 is a perspective view of a segment of embodiment 2 of the present application.

[0036] Figure 10 is a front view of embodiment 2 of the present application.

[0037] In the figure, the corresponding figure names of the reference numerals are as follows: 1. outer protective layer, 2. armor layer, 3. optical unit, 31. tear opening, 32. butterfly unit protective layer, 33. first reinforcing member, 34. protective strip, 35. optical fiber, 36. central hole, 37. fiber accommodating cavity, 38. first arc-shaped segment, 39. second arc-shaped segment, 4. central reinforcing member. DETAILED DESCRIPTION

[0038] Embodiment 1: as Figures 1 to 4 A layer-stranded optical cable capable of long-distance transmission comprises an outer protective layer 1, an armor layer 2 and a cable core, the cable core comprising a central reinforcing member 4 and six optical units 3, the optical units 3 being stranded around the central reinforcing member 4; The optical unit 3 comprises two butterfly units arranged symmetrically above and below and two protective strips 34 arranged symmetrically left and right, in the same cross section, the butterfly unit comprising a butterfly unit protective layer 32, two first reinforcing members 33 and at least one optical fiber 35, the first reinforcing members 33 and the optical fiber 35 being located in the butterfly unit protective layer 32, the two first reinforcing members 33 being arranged left and right, the optical fiber 35 being located between the two first reinforcing members 33, the outer edge of the butterfly unit protective layer 32 comprising a first arc-shaped segment 38 and a second arc-shaped segment 39 corresponding to the end portions, the arc openings of the first arc-shaped segment 38 and the second arc-shaped segment 39 being opposite to each other, the two optical units 3 being connected, the first arc-shaped segment 38 of the butterfly unit on the upper side and the first arc-shaped segment 38 of the butterfly unit on the lower side each being provided with a tear opening 31, facilitating peeling of the butterfly unit protective layer 32 and removal of the internal optical fiber 35, the second arc-shaped segment 39 of the butterfly unit on the upper side and the second arc-shaped segment 39 of the butterfly unit on the lower side having two intersection points, a square central hole 36 being further provided between the two butterfly units, the central hole 36 being located in the middle of the two tear openings 31, two non-adjacent corners of the central hole 36 each being opposite to a corresponding tear opening 31; The upper end of the left protection strip 34 is connected with the left end of the upper butterfly unit, the lower end of the left protection strip 34 is connected with the left end of the lower butterfly unit, the upper end of the right protection strip 34 is connected with the right end of the upper butterfly unit, the lower end of the right protection strip 34 is connected with the right end of the lower butterfly unit, and the outer side edges of the first arc-shaped sections 38 of the two butterfly units and the two protection strips 34 are located on the same circumference. The protection strip 34 and the two butterfly units form a fiber accommodating cavity 37, at least one optical fiber 35 is arranged in the fiber accommodating cavity 37, and the other two non-adjacent corners of the central hole 36 are respectively opposite to the corresponding fiber accommodating cavity 37. The protection strip 34 and the butterfly unit protective layer 32 are integrally formed.

[0039] Embodiment 2: as Figure 5 and Figure 6 , and referring to Figure 1 and Figure 2 , a layer-stranded optical cable capable of long-distance transmission, the embodiment and embodiment 1 are basically the same, the difference is that at least one optical fiber 35 is arranged between the central hole 36 and the fiber accommodating cavity 37.

[0040] Embodiment 3: as Figure 7 and Figure 8 , and referring to Figure 1 and Figure 2 , a layer-stranded optical cable capable of long-distance transmission, the embodiment and embodiment 1 are basically the same, the difference is that at least one optical fiber 35 is arranged in the central hole 36.

[0041] Embodiment 4: as Figure 9 and Figure 10 , and referring to Figure 3 and Figure 4 , a layer-stranded optical cable capable of long-distance transmission, the embodiment and embodiment 1 are basically the same, the difference is that the two ends of the opening of the tear opening 31 of the optical unit 3 abut against the side wall of the central reinforcing member 4.

[0042] The layer-stranded optical cable capable of long-distance transmission described in any of the above embodiments, the material of the outer protective layer 1 is polyethylene or nylon or polyvinyl chloride.

[0043] The layer-stranded optical cable capable of long-distance transmission described in any of the above embodiments, the model of the optical fiber 35 is G652 or G657.

[0044] The layer-stranded optical cable capable of long-distance transmission described in any of the above embodiments, the armor layer 2 is an aluminum strip or a corrugated steel strip or a water-blocking strip.

[0045] The layer-stranded optical cable capable of long-distance transmission described in any of the above embodiments, the first reinforcing member 33 is a phosphatized steel wire.

[0046] The application has the following advantages: 1. Four first reinforcing members 33 are arranged in the optical unit 3, which enhances the tensile strength of the optical unit 3 and the whole optical cable, and the first reinforcing members 33 and the central reinforcing member 4 are more reasonably distributed in the optical cable, so that the optical cable is more suitable for long-distance overhead laying, the optical unit 3 is not easy to deform during long-distance overhead laying, and the transmission performance of the optical fiber 35 in the optical unit 3, especially the optical fiber 35 in the fiber cavity 37, is less affected.

[0047] 2. The two butterfly unit protective layers 32 in the optical unit 3 can support the shape of the optical unit 3 and prevent it from deforming, and compared with the conventional loose tube structure optical cable, the optical cable is more suitable for long-distance overhead laying and has better compression resistance.

[0048] 3. The optical unit 3 has both the inner cavity (fiber cavity 37) of the ordinary loose tube and the butterfly unit that can be used for indoor laying, so it can meet both outdoor laying and indoor laying.

[0049] 4. The square central hole 36 and the tear opening 31 can facilitate peeling off the optical fiber 35 in the butterfly unit from the tear opening 31 first, and then peeling off the optical fiber 35 in the fiber cavity 37 from the corner of the square central hole 36 on one side of the fiber cavity 37.

[0050] 5. The optical fiber 35 is arranged between the central hole 36 and the fiber cavity 37, which can increase the number of optical fibers 35 in the optical unit 3 and facilitate the peeling of the optical fiber 35, 6. The square central hole 36 also has a buffering effect. When peeling off the butterfly unit on one side from the tear opening 31 on the side, the other butterfly unit will not be damaged at once due to the presence of the central hole 36.

[0051] 7. The central hole 36 can also accommodate optical fibers 35, further increasing the number of optical fibers 35 in the optical unit 3, and since the central hole 36 is located at the center of the optical unit 3, the optical fibers 35 in the central hole 36 are best protected and can be used for transmission of critical lines.

[0052] The above embodiments are only preferred technical solutions of the application, and should not be regarded as limitations of the application. The protection scope of the application should be based on the technical solutions claimed in the claims, including equivalent replacement solutions of the technical features claimed in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the application.

Claims

1. A stranded optical cable capable of long-distance transmission, comprising an outer sheath (1) and a cable core, the cable core comprising a central reinforcing member (4) and at least three optical units (3), the optical units (3) being stranded around the central reinforcing member (4); Its features are, The optical unit (3) includes two butterfly-shaped units arranged symmetrically on top and bottom and two protective strips (34) arranged symmetrically on the left and right. In the same cross section, the butterfly-shaped unit includes a butterfly-shaped unit sheath (32), two first reinforcing members (33) and at least one optical fiber (35). The first reinforcing members (33) and the optical fiber (35) are located inside the butterfly-shaped unit sheath (32). The two first reinforcing members (33) are arranged on the left and right, and the optical fiber (35) is located between the two first reinforcing members (33). The outer edge of the butterfly-shaped unit sheath (32) includes a first arc segment (38) and a second arc segment (39) that are connected at their ends. The arc openings of the first arc segment (38) and the second arc segment (39) are opposite each other, and the two optical units (3) are connected. The upper end of the left protective strip (34) is connected to the left end of the upper butterfly unit, the lower end of the left protective strip (34) is connected to the left end of the lower butterfly unit, the upper end of the right protective strip (34) is connected to the right end of the upper butterfly unit, and the lower end of the right protective strip (34) is connected to the right end of the lower butterfly unit. The first arc segment (38) of the two butterfly units and the outer edges of the two protective strips (34) are located on the same circumference. A fiber optic cavity (37) is formed between the protective strip (34) and the two butterfly units, and at least one optical fiber (35) is provided in the fiber optic cavity (37).

2. The stranded optical cable for long-distance transmission according to claim 1, characterized in that, The protective strip (34) and the butterfly-shaped unit sheath (32) are integrally formed.

3. A stranded optical cable capable of long-distance transmission according to claim 2, characterized in that, A tear (31) is provided on the first arc segment (38) of the butterfly unit on both the upper and lower sides.

4. A stranded optical cable capable of long-distance transmission according to claim 3, characterized in that, The second arc segment (39) of the upper butterfly unit and the second arc segment (39) of the lower butterfly unit have two intersection points.

5. A stranded optical cable capable of long-distance transmission according to claim 4, characterized in that, A square central hole (36) is provided between the two butterfly units, and the central hole (36) is located in the middle of the two tear openings (31).

6. A stranded optical cable capable of long-distance transmission according to claim 5, characterized in that, The two non-adjacent corners of the central hole (36) are opposite to a corresponding tear (31).

7. A stranded optical cable capable of long-distance transmission according to claim 6, characterized in that, The other two non-adjacent corners of the central hole (36) are opposite to a corresponding fiber cavity (37).

8. A stranded optical cable capable of long-distance transmission according to claim 7, characterized in that, At least one optical fiber (35) is provided between the central hole (36) and the fiber optic cavity (37).

9. A stranded optical cable capable of long-distance transmission according to claim 8, characterized in that, At least one optical fiber (35) is provided inside the central hole (36).

10. A stranded optical cable capable of long-distance transmission according to claim 9, characterized in that, The two ends of the opening of a tear (31) of the light unit (3) abut against the sidewall of the central reinforcement (4).

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