Optical fiber ribbon optical cable with loose tube provided with external reinforcement member

Abstract

The invention belongs to the technical field of optical cables, and discloses an optical fiber ribbon optical cable with a loose tube provided with an outer reinforcing member, the optical fiber ribbon optical cable is provided with an outer protective layer and a cable core, the outer protective layer is extruded outside the cable core, the cable core is composed of a cable core main body with a circular cross section, and a plurality of first placing grooves with outward openings are formed in the cable core main body at intervals around the center of the cable core main body; at least one loose tube is clamped in each first placing groove, an outer reinforcing piece is arranged on each loose tube, and at least one optical fiber ribbon is arranged on each loose tube; the loose tube has the beneficial effects of high mechanical strength, better protection on the optical fiber ribbon, more stable structure, higher fiber core density and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cables, and in particular relates to an optical fiber ribbon cable with a loose tube and an external reinforcement. Background Art

[0002] With the growing demand for broadband and high-speed access, users have an increasing demand for fiber optic ribbon cables. There are dozens of optical fibers in each loose tube of fiber optic ribbon cables. Therefore, the strengthening and protection of the loose tube plays an important role.

[0003] In the prior art, CN114545578A discloses a pressure-resistant rat-proof optical cable, which has an outer sheath, a central reinforcement member and at least three loose tubes, wherein the loose tube is composed of a loose tube body and support members located on both sides of the loose tube body and upward, at least one optical communication component is arranged inside the loose tube body, the bottom edge of the loose tube body is fitted with the central reinforcement member, the outer sheath is composed of an outer sheath body, a plurality of V-shaped expansion grooves are formed at intervals on the outer edge of the outer sheath body, a clamping groove is formed on the outer edge of the outer sheath body between two adjacent expansion grooves, and a rat-proof component is clamped in each clamping groove, a buffer layer and an armor layer are arranged between the loose tube and the outer sheath, and the upper end of the support member is in conflict with the inner wall of the armor layer.

[0004] The above-mentioned prior art has the following drawbacks: 1. Only one layer of loose tube can be accommodated around the central reinforcement, so that the fiber core density of the optical cable is not high; 2. The loose tube is not reinforced by the reinforcement and has poor tensile strength; 3. The stability of the internal structure of the optical cable is weak. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to disclose an optical fiber ribbon cable with a loose tube and an external reinforcement member, which is achieved by adopting the following technical solutions.

[0006] The utility model discloses an optical fiber ribbon cable with a loose tube and an external reinforcement, comprising an outer sheath, a tape layer and a cable core, wherein the tape layer is coated on the outside of the cable core, and the outer sheath is extruded outside the tape layer. The cable core is composed of a cable core body with a circular cross section, and a plurality of first placement grooves with openings facing outward are arranged on the cable core body at intervals around the center of the cable core body, and at least one loose tube is clamped in each first placement groove, and the loose tube is provided with an external reinforcement and at least one optical fiber ribbon.

[0007] In the optical fiber ribbon cable with a loose tube and an external reinforcement member, at least one pair of first limiting grooves are provided at intervals on both side walls of the first placement groove, and the loose tube is clamped with the corresponding pair of first limiting grooves.

[0008] The above-mentioned loose tube has an optical fiber ribbon cable with an external reinforcement, a second placement groove is provided between two adjacent first placement grooves, at least a pair of second limiting grooves are provided on the side walls of the second placement grooves, at least one loose tube is provided in each second placement groove, and the loose tube is clamped with the corresponding pair of second limiting grooves.

[0009] The loose tube optical fiber ribbon cable with an external reinforcement member described above comprises a loose tube body, and a limit block is respectively arranged above the center of the loose tube body on the left and right sides of the loose tube body, and an external reinforcement member is arranged in the limit block.

[0010] The loose tube optical fiber ribbon cable with an external reinforcement member described above has an inner sleeve layer provided on the upper side and the lower side of the inner cavity of the loose tube body, an optical fiber ribbon cavity is formed between the two inner sleeve layers, at least one optical fiber ribbon is provided in the optical fiber ribbon cavity, and an elastic cavity is formed between the inner sleeve layer and the loose tube body on the corresponding side.

[0011] In the above-mentioned loose tube optical fiber ribbon cable with external reinforcement, the height of the loose tube in the first placement groove is less than the depth of the first placement groove, and is greater than the distance between two adjacent pairs of first limiting grooves.

[0012] In the above-mentioned loose tube optical fiber ribbon cable with external reinforcement, the height of the loose tube in the second placement groove is less than the depth of the second placement groove and greater than the distance between two adjacent pairs of second limiting grooves.

[0013] In the loose tube optical fiber ribbon cable with an external reinforcement member, the bottom of the first placement groove is in extrusion contact with the adjacent loose tube body.

[0014] In the optical fiber ribbon cable with the loose tube having the external reinforcement member, when there are a plurality of loose tubes in the first placement groove, two adjacent loose tubes are squeezed and contacted.

[0015] In the loose tube optical fiber ribbon cable with an external reinforcement member, the bottom of the second placement groove is in extrusion contact with the adjacent loose tube body.

[0016] In the optical fiber ribbon cable with the loose tube having an external reinforcement member, when there are a plurality of loose tubes in the second placement groove, two adjacent loose tubes are squeezed and contacted.

[0017] In the above-mentioned loose tube optical fiber ribbon cable with external reinforcement, the outermost loose tube of the first placement groove or the second placement groove is completely located in the corresponding first placement groove or the second placement groove.

[0018] The optical fiber ribbon cable with a loose tube and an external reinforcement member described above has a central reinforcement member disposed at the center of the cable core body; The optical fiber ribbon cable with a loose tube and an external reinforcement member described above has an outer sheath made of polyethylene.

[0019] The loose tube optical fiber ribbon cable described above has an external reinforcement member, and the wrapping layer is a water-blocking tape or a steel tape or an aluminum tape.

[0020] The loose tube optical fiber ribbon cable with external reinforcement described above has a cable core made of high-density polyethylene.

[0021] The loose tube mentioned above has an optical fiber ribbon cable with an external reinforcement member, and the loose tube body and the inner tube layer are integrally formed.

[0022] In the above-mentioned loose tube optical fiber ribbon cable with external reinforcement, the loose tube body and the inner sleeve are made of polybutylene terephthalate or modified polypropylene.

[0023] The loose tube optical fiber ribbon cable described above has an external reinforcement member, and the optical fiber ribbon is formed by at least two optical fibers being connected by resin.

[0024] The loose tube optical fiber ribbon cable described above has an outer reinforcement member, and the central reinforcement member is a phosphating steel wire.

[0025] The loose tube described above has an optical fiber ribbon cable with an external reinforcement, and the external reinforcement is a phosphating steel wire.

[0026] This application has the following beneficial effects: 1. Two external reinforcements are directly arranged inside the loose tube body, which improves the mechanical strength of the loose tube.

[0027] 2. The two adjacent loose tubes are squeezed and contacted with each other, and are clamped and fixed with the cable core, making the structure of the optical cable more stable.

[0028] 3. The loose tube is located in the first placement groove or the second placement groove, and the cable core can protect the loose tube to prevent the loose tube from being damaged.

[0029] 4. The cable core has a first placement groove or a second placement groove, the depth of the first placement groove is greater than the depth of the second placement groove, so that the two adjacent first placement grooves can be closer, and the depth of the first placement groove can be deeper than the second placement groove, so that the cable core can accommodate more loose tubes, thereby accommodating more optical fiber ribbons.

[0030] 5. Two external reinforcements are directly arranged inside the loose tube body, so that the external reinforcements can be easily fixed to the equipment and connected.

[0031] 6. Elastic cavities are provided on the upper and lower sides of the loose tube, which makes the loose tube have better shock resistance, and the inner sleeve layer inside the loose tube can better protect the internal optical fiber ribbon.

[0032] 7. The external reinforcements in the loose tube are dispersed in the optical cable, so that the optical cable is more evenly stressed when it is pulled. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0034] Figure 2 It is a front view of embodiment 1 of the present invention.

[0035] Figure 3 It is a schematic diagram of the three-dimensional structure of a section of cable core in Example 1 of the present invention.

[0036] Figure 4 It is a front view of the cable core of Example 1 of the present invention.

[0037] Figure 5 It is a schematic diagram of the three-dimensional structure of a section of loose tube in Example 1 of the present invention.

[0038] Figure 6 It is a front view of the loose tube of Example 1 of the present invention.

[0039] Figure 7 It is a schematic diagram of the three-dimensional structure of a section of cable core in Example 2 of the present invention.

[0040] Figure 8 It is a front view of the cable core of Example 2 of the present invention.

[0041] In the figure, 1. outer sheath, 2. tape layer, 3. cable core, 31. cable core body, 32. first placement groove, 33. first limit groove, 34. central reinforcement, 35. second placement groove, 36. second limit groove, 4. loose tube, 41. loose tube body, 42. limit block, 43. elastic cavity, 44. inner tube, 45. optical fiber ribbon cavity, 46. outer reinforcement, 5. optical fiber ribbon. DETAILED DESCRIPTION

[0042] Example 1: Figures 1 to 6 , a loose tube optical fiber ribbon cable with an external reinforcement, comprising an outer sheath 1, a tape layer 2 and a cable core 3, the tape layer 2 is coated on the outside of the cable core 3, the outer sheath 1 is extruded outside the tape layer 2, the cable core 3 is composed of a cable core body 31 with a circular cross section, six first placement grooves 32 with openings facing outward are arranged around the center of the cable core body 31, at least one pair of first limiting grooves 33 are arranged at intervals and equidistantly on both side walls of the first placement groove 32, and a central reinforcement member 34 is arranged at the center of the cable core body 31; At least one loose tube 4 is provided in each first placement groove 32, the height of the loose tube 4 is less than the depth of the first placement groove 32, and is greater than the distance between two adjacent pairs of first limiting grooves 33, the loose tube 4 is composed of a loose tube body 41, an inner sleeve layer 44 is respectively provided on the upper side and the lower side of the inner cavity of the loose tube body 41, an optical fiber ribbon cavity 45 is formed between the two inner sleeve layers 44, at least one optical fiber ribbon 5 is provided in the optical fiber ribbon cavity 45, an elastic cavity 43 is formed between the inner sleeve layer 44 and the loose tube body 41 on the corresponding side, and a limiting block 42 is respectively provided on the left and right sides of the loose tube body 41, which is located above the center of the loose tube body 41, and an external reinforcement member 46 is provided in the limiting block 42.

[0043] Example 2: Figure 7 and Figure 8 , and refer to Figure 1 and Figure 2 , Figure 5 and Figure 6 , a loose tube optical fiber ribbon cable with an external reinforcement, comprising an outer sheath 1, a tape layer 2 and a cable core 3, the tape layer 2 is coated on the outside of the cable core 3, the outer sheath 1 is extruded outside the tape layer 2, the cable core 3 is composed of a cable core body 31 with a circular cross section, six first placement grooves 32 with openings facing outward are arranged around the center of the cable core body 31, the two side walls of the first placement groove 32 are spaced and equidistantly provided with at least one pair of first limiting grooves 33, a second placement groove 35 is provided between two adjacent first placement grooves 32, the side walls of the second placement groove 35 are spaced and equidistantly provided with at least one pair of second limiting grooves 36, the depth of the first placement groove 32 is greater than the depth of the second placement groove 35, and a central reinforcement member 34 is provided at the center of the cable core body 31; At least one loose tube 4 is provided in each first placement groove 32, and at least one loose tube 4 is provided in each second placement groove 35. The height of the loose tube 4 in the first placement groove 32 is less than the depth of the first placement groove 32, and is greater than the distance between two adjacent pairs of first limiting grooves 33. The height of the loose tube 4 in the second placement groove 35 is less than the depth of the second placement groove 35, and is greater than the distance between two adjacent pairs of second limiting grooves 36. The loose tube 4 is composed of a loose tube body 41, and an inner sleeve layer 44 is respectively provided on the upper side and the lower side of the inner cavity of the loose tube body 41, and an optical fiber ribbon cavity 45 is formed between the two inner sleeve layers 44. At least one optical fiber ribbon 5 is provided in the optical fiber ribbon cavity 45, and an elastic cavity 43 is formed between the inner sleeve layer 44 and the loose tube body 41 on the corresponding side. A limiting block 42 is respectively provided on the left and right sides of the loose tube body 41 above the center of the loose tube body 41, and an outer reinforcement member 46 is provided in the limiting block 42.

[0044] In the loose tube optical fiber ribbon cable with an external reinforcement member, the bottom of the first placement groove 32 is in compression contact with the adjacent loose tube body 41 .

[0045] In the optical fiber ribbon cable with a loose tube and an external reinforcement member described above, when there are a plurality of loose tubes 4 in the first placement groove 32, two adjacent loose tubes 4 are squeezed and contacted.

[0046] In the loose tube optical fiber ribbon cable with an external reinforcement member, the bottom of the second placement groove 35 is in compression contact with the adjacent loose tube body 41 .

[0047] In the optical fiber ribbon cable with a loose tube having an external reinforcement member, when there are a plurality of loose tubes 4 in the second placement groove 35, two adjacent loose tubes 4 are squeezed and contacted.

[0048] In the loose tube optical fiber ribbon cable with an external reinforcement member, the outermost loose tube 4 of the first placement groove 32 or the second placement groove 35 is completely located in the corresponding first placement groove 32 or the second placement groove 35 .

[0049] In the loose tube optical fiber ribbon cable with external reinforcement described in any of the above embodiments, the material of the outer sheath 1 is polyethylene.

[0050] In the loose tube optical fiber ribbon cable with external reinforcement described in any of the above embodiments, the tape layer 2 is a water-blocking tape or a steel tape or an aluminum tape.

[0051] In the loose tube optical fiber ribbon cable with external reinforcement described in any of the above embodiments, the material of the cable core 3 is high-density polyethylene.

[0052] In the loose tube optical fiber ribbon cable with an external reinforcement member described in any of the above embodiments, the loose tube body 41 and the inner tube layer 44 are integrally formed.

[0053] In the loose tube optical fiber ribbon cable with an external reinforcement member described in any of the above embodiments, the loose tube body 41 and the inner sleeve 44 are made of polybutylene terephthalate or modified polypropylene.

[0054] In any of the above embodiments, the loose tube has an optical fiber ribbon cable with an external reinforcement member, and the optical fiber ribbon 5 is formed by at least two optical fibers being connected by resin.

[0055] In the loose tube optical fiber ribbon cable with an outer reinforcement member described in any of the above embodiments, the central reinforcement member 34 is a phosphating steel wire.

[0056] The loose tube optical fiber ribbon cable with an external reinforcement member described in any of the above embodiments, wherein the external reinforcement member 46 is a phosphating steel wire.

[0057] The present application can be used as an intelligent sensor or intelligent sensing element; since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor or an image sensor; since it transmits optical signals through the principle of total reflection, it can also be used as a distance sensor; the optical fiber in the present application is an optical waveguide itself, so it can be used as an optical waveguide, such as an array optical waveguide or a diffraction optical waveguide; the present application can also be used in the field of optical computing, as part of optical chip computing, in the fields of optical computing, optical computing, and optical network computing.

[0058] This application has the following beneficial effects: 1. Two external reinforcement members 46 are directly disposed inside the loose tube body 41 , thereby improving the mechanical strength of the loose tube 4 .

[0059] 2. Two adjacent loose tubes 4 are pressed and contacted with each other, and are clamped and fixed with the cable core 3, making the structure of the optical cable more stable.

[0060] 3. The loose tube 4 is located in the first placement groove 32 or the second placement groove 35 , and the cable core 3 can protect the loose tube 4 to prevent the loose tube 4 from being damaged.

[0061] 4. The cable core 3 has a first placement groove 32 or a second placement groove 35, the depth of the first placement groove 32 is greater than the depth of the second placement groove 35, so that the two adjacent first placement grooves 32 can be closer, and the depth of the first placement groove 32 can be deeper than the second placement groove 35, so that the cable core 3 can accommodate more loose tubes 4, and thus can accommodate more optical fiber ribbons.

[0062] 5. Two external reinforcement members 46 are directly disposed in the loose tube body 41, so that the external reinforcement members 46 can be conveniently fixed to the equipment and connected.

[0063] 6. Elastic cavities 43 are provided on the upper and lower sides of the loose tube 4, so that the loose tube 4 has a better anti-vibration effect, and the inner sleeve layer 44 inside the loose tube 4 can better protect the optical fiber ribbon inside.

[0064] 7. The external reinforcement members 46 in the loose tube 4 are dispersedly distributed in the optical cable, so that the optical cable is subjected to more uniform force when subjected to tension.

[0065] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting 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, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A loose tube optical fiber ribbon cable with an external reinforcement, comprising an outer sheath (1), a tape layer (2) and a cable core (3), wherein the tape layer (2) is coated on the outside of the cable core (3), characterized in that: The outer sheath (1) is extruded outside the tape layer (2); the cable core (3) is composed of a cable core body (31) with a circular cross section; a plurality of first placement grooves (32) with openings facing outward are arranged at intervals around the center of the cable core body (31); at least one loose tube (4) is clamped in each first placement groove (32); an outer reinforcement member (46) is arranged on the loose tube (4); and at least one optical fiber ribbon (5) is arranged on the loose tube (4).

2. The optical fiber ribbon cable with loose tube and external reinforcement according to claim 1, characterized in that: At least one pair of first limiting grooves (33) are arranged at intervals on both side walls of the first placement groove (32), and the loose sleeve (4) is clamped with the corresponding pair of first limiting grooves (33).

3. The optical fiber ribbon cable with loose tube and external reinforcement according to claim 2, characterized in that: A second placement groove (35) is provided between two adjacent first placement grooves (32), at least one pair of second limiting grooves (36) are provided at intervals on two side walls of the second placement groove (35), at least one loose tube (4) is provided in each second placement groove (35), and the loose tube (4) is clamped with the corresponding pair of second limiting grooves (36).

4. The optical fiber ribbon cable with loose tube and external reinforcement according to claim 3, characterized in that: The loose tube (4) is composed of a loose tube body (41), and a limit block (42) is respectively provided on the left and right sides of the loose tube body (41) above the center of the loose tube body (41), and an external reinforcement member (46) is provided inside the limit block (42).

5. The optical fiber ribbon cable with loose tube and external reinforcement according to claim 4, characterized in that: An inner sleeve layer (44) is respectively provided on the upper side and the lower side of the inner cavity of the loose tube body (41); an optical fiber ribbon cavity (45) is formed between the two inner sleeve layers (44); at least one optical fiber ribbon (5) is arranged in the optical fiber ribbon cavity (45); and an elastic cavity (43) is formed between the inner sleeve layer (44) and the loose tube body (41) on the corresponding side.

6. The loose tube optical fiber ribbon cable with external reinforcement according to claim 5, characterized in that: The height of the loose sleeve (4) in the first placement groove (32) is less than the depth of the first placement groove (32) and greater than the distance between two adjacent pairs of first limiting grooves (33).

7. The loose tube optical fiber ribbon cable with external reinforcement according to claim 6, characterized in that: The height of the loose tube (4) in the second placement groove (35) is less than the depth of the second placement groove (35) and greater than the distance between two adjacent pairs of second limiting grooves (36).

8. The loose tube optical fiber ribbon cable with external reinforcement according to claim 7, characterized in that: The bottom of the first placement groove (32) is in compression contact with the adjacent loose tube body (41).

9. The loose tube optical fiber ribbon cable with external reinforcement according to claim 8, characterized in that: When a plurality of loose tubes (4) are arranged in the first placement groove (32), two adjacent loose tubes (4) are in contact with each other by compression.

10. The loose tube optical fiber ribbon cable with external reinforcement according to claim 9, characterized in that: The bottom of the second placement groove (35) is in compression contact with the adjacent loose tube body (41); when a plurality of loose tubes (4) are arranged in the second placement groove (35), two adjacent loose tubes (4) are in compression contact, and the outermost loose tubes (4) of the first placement groove (32) or the second placement groove (35) are completely located in the corresponding first placement groove (32) or the second placement groove (35).

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