Central bundle tube optical cable with colored stripe

Abstract

The present application belongs to the field of cable, especially relates to a central bundle tube type optical cable with color strips, which has an outer sheath and a loose tube, characterized in that the outer sheath is composed of a first sheath, the first sheath is fixedly connected at two ends of two symmetrical wave-shaped sheaths, the inner side of the two connecting positions is further provided with a first reinforcing sheath, the first reinforcing sheath is provided with a first reinforcing member, each wave-shaped sheath forms a V-shaped groove in the inward recess, at least one color strip is arranged on the inner wall of the groove of at least one V-shaped groove, a second sheath is fixedly arranged between the two V-shaped grooves, the loose tube is arranged in the second sheath, and at least one optical unit is arranged in the loose tube; the present application has the beneficial effects of simple structure, good compression resistance, good tensile resistance, color strips not easy to be contaminated, uniform tensile stress and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cable, in particular to a center tube type optical cable with color strip. BACKGROUND

[0002] As the main carrier of signal transmission, optical cable has a wide application in the field of communication due to its light weight, low cost and small attenuation. The center tube type optical cable is favored by users due to its large fiber density, small outer diameter and small space occupied during laying.

[0003] In the prior art, CN205750010U discloses a center tube type double loose tube branchable flat optical cable, which is composed of two loose tubes with different colors, parallel and symmetrical reinforcing members and an outer sheath. The loose tube is composed of colored optical fibers with different colors, fiber paste and a PBT sleeve. The reinforcing member can be FRP or steel wire. The outer sheath can be LSZH or PE. The center tube type double loose tube branchable flat optical cable is placed at the center of the cable at an angle of 45 degrees by special extrusion equipment and a special mold. The reinforcing members are symmetrically placed on both sides. A flat outer sheath is extruded on the outside, and a symmetrical V-shaped slot is formed on the upper and lower sides, which is easy to peel off the sheath.

[0004] The above prior art has the following technical defects: 1. There is no buffer between the left and right reinforcing members, the outer sheath and the loose tube. When subjected to pressure from the left and right sides, the pressure resistance is insufficient; 2. There is no buffer between the upper and lower outer sheaths and the loose tube. When subjected to pressure from the upper and lower sides, the pressure resistance is insufficient. SUMMARY

[0005] To solve the above problems, the purpose of the present application is to disclose a center tube type optical cable with color strip, which is realized by the following technical scheme.

[0006] A center tube type optical cable with color strip has an outer sheath and a loose tube, characterized in that the outer sheath is composed of a first sheath, which is fixedly connected at both ends by two symmetrical wave-shaped sheaths. A first reinforcing member sheath is also provided inside the two connecting parts. The connecting part of the first reinforcing member sheath and the corresponding wave-shaped sheath forms a first reinforcing member cavity. A first reinforcing member is provided in the first reinforcing member cavity. Each wave-shaped sheath forms a V-shaped groove in the inward recess. At least one color strip is provided on the inner wall of the groove of at least one V-shaped groove. A second sheath is fixedly provided between the two V-shaped grooves. A loose tube cavity is formed in the second sheath. The loose tube is located in the loose tube cavity. At least one optical unit is provided in the loose tube. An anti-pressure cavity is formed between the first sheath and the second sheath.

[0007] The center bundle tube type optical cable with color strips has the features that the upper part of the second protective layer forms an opening along the left side of the corresponding V-shaped groove on the upper side, and the lower part of the second protective layer forms an opening along the right side of the corresponding V-shaped groove on the lower side.

[0008] The center bundle tube type optical cable with color strips has the features that the sum of the distances between the two first reinforcing member protective layers and the corresponding second protective layers is less than the outer diameter of the loose tube.

[0009] The center bundle tube type optical cable with color strips has the features that the inside of each outward protruding part of the wave-shaped protective sheath is further provided with a second reinforcing member protective layer, the second reinforcing member protective layer and the corresponding outward protruding part of the wave-shaped protective sheath form a second reinforcing member cavity, and the second reinforcing member cavity is provided with a second reinforcing member.

[0010] The center bundle tube type optical cable with color strips has the features that the second reinforcing member is a phosphorized steel wire.

[0011] The center bundle tube type optical cable with color strips has the features that the outer protective layer material is high-density polyethylene, low-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

[0012] The center bundle tube type optical cable with color strips has the features that the loose tube material is polybutylene terephthalate or modified polypropylene.

[0013] The center bundle tube type optical cable with color strips has the features that the first reinforcing member is a phosphorized steel wire.

[0014] The center bundle tube type optical cable with color strips has the features that the optical unit is an optical fiber, and the optical fiber is a single-mode optical fiber or a multi-mode optical fiber.

[0015] Therefore, the present application has the beneficial effects of simple structure, good compression resistance, good tensile resistance, less pollution of color strips, uniform tensile stress and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective structural schematic diagram of the embodiment 1 of the present application.

[0017] Figure 2 It is a front view of the embodiment 1 of the present application.

[0018] Figure 3 It is a front view of the outer protective layer of the embodiment 1 of the present application.

[0019] Figure 4 It is a perspective structural schematic diagram of the embodiment 2 of the present application.

[0020] Figure 5Front view of the outer jacket of the embodiment 2 of the present application.

[0021] Figure 6 Front view of the outer jacket of the embodiment 2 of the present application.

[0022] Figure 7 Front view of the outer jacket of the embodiment 3 of the present application.

[0023] Figure 8 Schematic perspective view of the embodiment 4 of the present application.

[0024] Figure 9 Front view of the outer jacket of the embodiment 4 of the present application.

[0025] In the figure: 1. outer jacket, 11. first jacket, 12. second jacket, 13. loose tube cavity, 14. colored stripe, 15. V-shaped groove, 16. pressure-resistant cavity, 17. first reinforcing member jacket, 18. first reinforcing member cavity, 19. opening, 110. second reinforcing member jacket, 111. second reinforcing member cavity, 2. loose tube, 3. first reinforcing member, 4. optical unit, 5. second reinforcing member. DETAILED DESCRIPTION

[0026] Embodiment 1: see Figures 1 to 3 A central bundle tube optical cable with colored stripe, having an outer jacket 1 and a loose tube 2, characterized in that the outer jacket 1 is composed of a first jacket 11, the first jacket 11 is fixedly connected at both ends of two symmetrical wavy sheaths, and a first reinforcing member jacket 17 is further arranged inside the two connecting positions, the first reinforcing member jacket 17 and the connecting position of the corresponding wavy sheath form a first reinforcing member cavity 18, and a first reinforcing member 3 is arranged in the first reinforcing member cavity 18, each wavy sheath forms a V-shaped groove 15 in the inward recess, a colored stripe 14 is arranged on the inner wall of the groove of the V-shaped groove 15, a second jacket 12 is fixedly arranged between the two V-shaped grooves 15, a loose tube cavity 13 is formed in the second jacket 12, and the loose tube 2 is arranged in the loose tube cavity 13, at least one optical unit 4 is arranged in the loose tube 2, and a pressure-resistant cavity 16 is formed between the first jacket 11 and the second jacket 12.

[0027] Embodiment 2: see Figures 4 to 6A central bundle tube optical cable with a color bar, having an outer sheath 1 and a loose tube 2, characterized in that the outer sheath 1 is composed of a first sheath 11, the first sheath 11 is fixedly connected at both ends of two symmetrical wave-shaped sheaths, and a first reinforcing member sheath 17 is further arranged inside the two connecting positions, the first reinforcing member sheath 17 and the connecting position of the corresponding wave-shaped sheath form a first reinforcing member cavity 18, a first reinforcing member 3 is arranged in the first reinforcing member cavity 18, each wave-shaped sheath forms a V-shaped groove 15 in the inward recess, the inner wall of the groove of one of the V-shaped grooves 15 is provided with a color bar 14, a second sheath 12 is fixedly arranged between the two V-shaped grooves 15, the second sheath 12 forms a loose tube cavity 13, an opening 19 is formed on the upper part of the second sheath 12 along the left side edge of the corresponding V-shaped groove 15 on the upper side, an opening 19 is formed on the lower part of the second sheath 12 along the right side edge of the corresponding V-shaped groove 15 on the lower side, the loose tube 2 is arranged in the loose tube cavity 13, at least one optical unit 4 is arranged in the loose tube 2, a compression-resistant cavity 16 is formed between the first sheath 11 and the second sheath 12, and the sum of the distances between the two first reinforcing member sheaths 17 and the corresponding second sheaths 12 is less than the outer diameter of the loose tube 2.

[0028] In the embodiment, by arranging the openings 19 and the sum of the distances between the two first reinforcing member sheaths 17 and the corresponding second sheaths 12 being less than the outer diameter of the loose tube 2, when the optical cable is subjected to pressure from the left and right sides, the loose tube cavity 13 becomes larger, preventing the pressure from the left and right sides from affecting the optical unit, and the loose tube 2 will not come out of the loose tube cavity 13; when the optical cable is subjected to pressure from the upper and lower sides, the second sheath 12 slides along the inner wall of the corresponding V-shaped groove 15, preventing the pressure from the upper and lower sides from affecting the optical unit, and the loose tube 2 will not come out of the loose tube cavity 13.

[0029] Embodiment 3: see Figure 7 and refer to Figures 4 to 5A kind of central bundle tube optical cable with color bar, with outer sheath 1 and loose tube 2, it is characterized in that the outer sheath 1 is made of first sheath 11, first sheath 11 is fixedly connected by two symmetrical wave-shaped sheaths, and first reinforcing member sheath 17 is also arranged in the inner side of the two connecting places, first reinforcing member sheath 17 and the connecting place of corresponding wave-shaped sheath form a first reinforcing member cavity 18, a first reinforcing member 3 is arranged in first reinforcing member cavity 18, each wave-shaped sheath forms a V-shaped groove 15 in the inward recess, and a color bar 14 is arranged in the groove inner wall of two V-shaped grooves 15, a second sheath 12 is fixed between two V-shaped grooves 15, a loose tube cavity 13 is formed in second sheath 12, a notch 19 is formed in the upper part of second sheath 12 along the left side edge of corresponding V-shaped groove 15 on the upper side, a notch 19 is formed in the lower part of second sheath 12 along the right side edge of corresponding V-shaped groove 15 on the lower side, loose tube 2 is located in loose tube cavity 13, at least one optical unit 4 is arranged in loose tube 2, a compression-resistant cavity 16 is formed between first sheath 11 and second sheath 12, and the sum of the distance between two first reinforcing member sheaths 17 and corresponding second sheaths 12 is less than the outer diameter of loose tube 2.

[0030] Compared with embodiment 2, the inner wall of the upper and lower V-shaped grooves 15 is respectively provided with a color bar 14, and when wiring, there is a color bar 14 on the upper side no matter which side of the upper basket faces up, which facilitates the identification of the optical cable.

[0031] Embodiment 4: see Figure 8 and Figure 9 , and refer to Figures 4 to 5A central bundle tube optical cable with color strip, having an outer sheath 1 and a loose tube 2, characterized in that the outer sheath 1 is composed of a first sheath 11, the first sheath 11 is fixedly connected at both ends of two symmetrical wave-shaped sheaths, and the inner side of the two connection positions is further provided with a first reinforcing member sheath 17, the first reinforcing member sheath 17 and the connection position of the corresponding wave-shaped sheath form a first reinforcing member cavity 18, and a first reinforcing member 3 is arranged in the first reinforcing member cavity 18; the inner side of the outward protruding position of each wave-shaped sheath is further provided with a second reinforcing member sheath 110, the second reinforcing member sheath 110 and the outward protruding position of the corresponding wave-shaped sheath form a second reinforcing member cavity 111, and a second reinforcing member 5 is arranged in the second reinforcing member cavity 111; each wave-shaped sheath forms a V-shaped groove 15 at the inward recessed position, and a color strip 14 is arranged on the inner wall of the groove of the two V-shaped grooves 15; a second sheath 12 is fixedly arranged between the two V-shaped grooves 15, and a loose tube cavity 13 is formed in the second sheath 12; an opening 19 is formed in the upper part of the second sheath 12 along the left side edge of the corresponding V-shaped groove 15 on the upper side, and an opening 19 is formed in the lower part of the second sheath 12 along the right side edge of the corresponding V-shaped groove 15 on the lower side; the loose tube 2 is located in the loose tube cavity 13, at least one optical unit 4 is arranged in the loose tube 2, a compression-resistant cavity 16 is formed between the first sheath 11 and the second sheath 12, and the sum of the distances between the two first reinforcing member sheaths 17 and the corresponding second sheath 12 is less than the outer diameter of the loose tube 2.

[0032] The central bundle tube optical cable with color strip according to any one of the above embodiments is characterized in that the second reinforcing member 5 is a phosphatized steel wire.

[0033] Compared with example 3, the tensile property of the optical cable is enhanced by adding the second reinforcing member 5, and the second reinforcing member 5 does not contact the second sheath 12, so as not to affect the optical unit in the loose tube 2; the second reinforcing member 5 and the first reinforcing member 3 are located around the optical unit 4, so that the stress on the optical cable is more uniform.

[0034] The central bundle tube optical cable with color strip according to any one of the above embodiments is characterized in that the material of the outer sheath 1 is high-density polyethylene, low-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

[0035] The central bundle tube optical cable with color strip according to any one of the above embodiments is characterized in that the material of the loose tube 2 is polybutylene terephthalate or modified polypropylene.

[0036] The central bundle tube optical cable with color strip according to any one of the above embodiments is characterized in that the first reinforcing member 3 is a phosphatized steel wire.

[0037] The center bundle tube optical cable with the color bar according to any one of the above embodiments is characterized in that the optical unit 4 is an optical fiber, and the optical fiber is a single-mode optical fiber or a multi-mode optical fiber.

[0038] In the present application, the first reinforcing member 3 is located on both sides of the optical cable and does not contact the optical unit 4 in the loose tube 2, thereby reducing the influence of the first reinforcing member 3 on the optical unit 4; the left and right sides of the optical cable meet to form an angle, so that the left and right sides of the optical cable cannot stand on the ground, and the color bar 14 can be upward, thereby facilitating discovery; and the color bar 14 is located in the V-shaped groove 15 and is not easy to be contaminated.

[0039] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, and the equivalent replacement solutions of the technical features recited in the claims are within the protection scope. That is, the equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A central bundle tube optical cable with colored stripes, having an outer jacket (1) and a loose tube (2), characterized in that The outer protective layer (1) is composed of a first protective layer (11), the first protective layer (11) is fixedly connected by two symmetrical wave-shaped sheaths at both ends, and a first reinforcing layer (17) is further arranged inside the two connecting positions, the first reinforcing layer (17) and the connecting position of the corresponding wave-shaped sheath form a first reinforcing cavity (18), a first reinforcing member (3) is arranged in the first reinforcing cavity (18), each wave-shaped sheath forms a V-shaped groove (15) in the inward recessed position, at least one color bar (14) is arranged on the inner wall of the recess of at least one V-shaped groove (15), a second protective layer (12) is fixedly arranged between the two V-shaped grooves (15), the second protective layer (12) forms a loose tube cavity (13), a loose tube (2) is arranged in the loose tube cavity (13), at least one optical unit (4) is arranged in the loose tube (2), and a compression-resistant cavity (16) is formed between the first protective layer (11) and the second protective layer (12). An opening (19) is formed on the upper part of the second protective layer (12) along the left side of the corresponding V-shaped groove (15) on the upper side, and an opening (19) is formed on the lower part of the second protective layer (12) along the right side of the corresponding V-shaped groove (15) on the lower side. The sum of the distances between the two first reinforcing layer (17) and the corresponding second protective layer (12) is less than the outer diameter of the loose tube (2).

2. A central bundle tube type optical cable having colored stripes according to claim 1, wherein A second reinforcing layer (110) is further arranged inside the outward protruding position of each wave-shaped sheath, the second reinforcing layer (110) and the outward protruding position of the corresponding wave-shaped sheath form a second reinforcing cavity (111), and a second reinforcing member (5) is arranged in the second reinforcing cavity (111).

3. A central bundle tube type optical cable having colored stripes according to claim 2, wherein The second reinforcing member (5) is a phosphatized steel wire.

4. A central bundle tube type optical cable having colored stripes according to claim 3, wherein The material of the outer protective layer (1) is high-density polyethylene, low-density polyethylene, medium-density polyethylene or flame-retardant polyolefin.

5. A central bundle tube optical cable having colored stripes according to claim 4, wherein The material of the loose tube (2) is polybutylene terephthalate or modified polypropylene.

6. A central bundle tube optical cable having colored stripes according to claim 5, wherein The first reinforcing member (3) is a phosphatized steel wire.

7. A central bundle tube optical cable with colored stripes according to claim 6, characterized in that The optical unit (4) is an optical fiber.

8. A central bundle tube type optical cable having colored stripes according to claim 7, wherein The optical fiber is a single-mode optical fiber or a multi-mode optical fiber.

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