Optical fiber ribbon optical cable with high fiber core density

Abstract

The invention belongs to the technical field of optical cables, and discloses a high-core-density optical fiber ribbon optical cable which is provided with an outer protective layer and a cable core, the cable core is composed of an inner sleeve body and an outer sleeve body, the inner sleeve body is located in the outer sleeve body, and the inner sleeve body and the outer sleeve body are mutually clamped and fixed; at least one optical fiber ribbon is arranged in each of the inner sleeve body and the outer sleeve body; the optical fiber has the beneficial effects of simple structure, high fiber core density, good tensile property, high production efficiency, stable structure 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 high fiber core density. Background Art

[0002] As the demand for broadband and high-speed access continues to grow, the need for high-density optical fibers in the same cable is increasing day by day.

[0003] In the prior art, CN119024508A discloses a combined optical fiber ribbon cable, which has an outer sheath, wherein a first combined unit and four second combined units are arranged in the outer sheath, wherein the first combined unit is composed of four subunits, wherein the subunits are composed of connecting ribs, a first loose tube and a first reinforcement member sheath connected in sequence, wherein the connecting ribs of the four subunits point to the same center, and a clamping groove is formed between two adjacent first loose tubes, wherein the second combined unit is composed of a first protective plate and a second loose tube, wherein at least one optical fiber ribbon is arranged in the first loose tube and the second loose tube, and the second loose tubes of the four second combined units are respectively clamped into the clamping grooves on the corresponding side.

[0004] The above-mentioned prior art has the following drawbacks: 1. Low fiber core density; 2. Relatively poor tensile performance; 3. Non-compact structure. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to disclose a high core density optical fiber ribbon cable, which is achieved by adopting the following technical solutions.

[0006] A high core density optical fiber ribbon cable, comprising an outer sheath and a cable core, wherein the cable core is composed of an inner sleeve body and an outer sleeve body, wherein the inner sleeve body is composed of four first loose sleeves and one second loose sleeve, wherein the four first loose sleeves are respectively located above, below, left and right of the second loose sleeve, and the second loose sleeve and each first loose sleeve are connected via a first connecting component; The outer sleeve body is surrounded by eight third loose sleeves and four fourth loose sleeves to form a ring, a fourth loose sleeve is arranged every two third loose sleeves, the fourth loose sleeve is recessed toward the center of the ring, two adjacent third loose sleeves are connected by a second connecting component, and adjacent third loose sleeves and fourth loose sleeves are connected by a second connecting component; The inner sleeve body is located in the outer sleeve body, and two adjacent fourth loose sleeves and two third loose sleeves between the two fourth loose sleeves clamp a corresponding first loose sleeve; At least one optical fiber ribbon is arranged in each of the first loose tube, the second loose tube, the third loose tube and the fourth loose tube.

[0007] In the above-mentioned high core density optical fiber ribbon cable, the four fourth loose tubes are respectively located at the four vertices of the square, and a second inner cavity is provided between the four fourth loose tubes; Two adjacent fourth loose tubes and two third loose tubes between the two fourth loose tubes are provided with a first inner cavity, and the first inner cavity is communicated with the second inner cavity; The first loose tube is located in the corresponding first inner cavity, and the first loose tube is in contact with the inner wall of the first inner cavity. The second loose tube is located in the second inner cavity. A first outer groove is provided between two adjacent first loose tubes. The third loose tube is located in the corresponding first outer groove, and the third loose tube is in contact with the inner wall of the corresponding first outer groove.

[0008] In the high core density optical fiber ribbon cable described above, a second outer slot is provided between the fourth loose tube and two adjacent third loose tubes, an independent tube or electrical unit or filling rope is provided in the second outer slot, and the independent tube or electrical unit or filling rope is attached to the second outer slot.

[0009] In the above-mentioned high core density optical fiber ribbon cable, at least one optical fiber ribbon is arranged in an independent casing.

[0010] In the above-mentioned high core density optical fiber ribbon cable, a first optical fiber ribbon cavity is provided in the first connecting component, and at least one optical fiber ribbon is provided in the first optical fiber ribbon cavity.

[0011] In the above-mentioned high core density optical fiber ribbon cable, a second optical fiber ribbon cavity is provided in the second connecting component, and at least one optical fiber ribbon is provided in the second optical fiber ribbon cavity.

[0012] In the above-mentioned high core density optical fiber ribbon cable, a first reinforcing member is disposed in the first connecting member.

[0013] In the above-mentioned high core density optical fiber ribbon cable, a second reinforcing member is disposed in the second connecting component.

[0014] In the above-mentioned high core density optical fiber ribbon cable, the distances between the four first loose tubes and the second loose tubes are equal.

[0015] In the above-mentioned high core density optical fiber ribbon cable, a tape layer is provided between the outer sheath and the cable core.

[0016] The material of the outer sheath of the high core density optical fiber ribbon cable described above is polyethylene.

[0017] In the above-mentioned high core density optical fiber ribbon cable, the wrapping layer is a steel tape or an aluminum tape or a water-blocking tape.

[0018] In the above-mentioned high core density optical fiber ribbon cable, the first loose tube, the second loose tube and the first connecting component are integrally formed and the material is polybutylene terephthalate.

[0019] In the above-mentioned high core density optical fiber ribbon cable, the third loose tube, the second connecting component and the fourth loose tube are integrally formed and the material is polybutylene terephthalate.

[0020] In the above-mentioned high core density optical fiber ribbon cable, the material of the independent sleeve is polybutylene terephthalate.

[0021] The optical fiber ribbon cable with high fiber core density described above is formed by at least two optical fibers being connected in parallel.

[0022] In the above-mentioned high core density optical fiber ribbon cable, the first reinforcement member and the second reinforcement member are steel wires or glass fiber reinforced plastic rods.

[0023] The present invention has the following beneficial effects: 1. The spacing between the sleeves is small, so that the adjacent sleeves are closer together, thereby increasing the core density of the optical fiber in the cable core in disguised form.

[0024] 2. The reinforcement member is located in the connecting component used for connecting the sleeves, and there is no need to reserve a separate space for placing the reinforcement member, which greatly increases the space available for placing the optical fiber ribbon.

[0025] 3. The strength members are distributed in the cable core, which improves the tensile performance of the optical cable, makes the force on the optical cable more uniform, further reduces the space of the cable core, and increases the core density of the optical fiber in the cable core.

[0026] 4. The sleeves in the inner sleeve body and the outer sleeve body are respectively connected into a whole through connecting components, so that the inner sleeve body and the outer sleeve body can be integrally formed, which improves production efficiency, and does not need to use materials such as yarn for fixing, saving materials and reducing costs.

[0027] 5. The inner sleeve body and the outer sleeve body are mutually clamped and fixed, making the structure of the cable core more stable and compact. Even if the outer sleeve body is damaged, the inner sleeve body and the outer sleeve body can still protect the mutually clamped structure.

[0028] 6. A first optical fiber ribbon cavity and a second optical fiber ribbon cavity may also be provided in the first connecting component and the second connecting component, so as to further improve the core density of the optical fiber in the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0030] Figure 2 It is a front view of embodiment 1 of the present invention.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of a section of the inner sleeve body of Example 1 of the present invention.

[0032] Figure 4It is a front view of the inner sleeve body of embodiment 1 of the present invention.

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of a section of the outer sleeve body of Example 1 of the present invention.

[0034] Figure 6 It is a front view of the outer sleeve body of Example 1 of the present invention.

[0035] Figure 7 It is a front view of embodiment 2 of the present invention.

[0036] Figure 8 It is a front view of the inner sleeve body of embodiment 2 of the present invention.

[0037] Fig. 9 It is a front view of the outer sleeve body of Example 2 of the present invention.

[0038] In the figure, 1. outer sheath, 2. tape layer, 3. inner sleeve body, 31. first loose sleeve, 32. first outer slot, 33. first connecting component, 34. first reinforcement, 35. second loose sleeve, 36. first optical fiber ribbon cavity, 4. outer sleeve body, 41. third loose sleeve, 42. second outer slot, 43. second connecting component, 44. first inner cavity, 45. fourth loose sleeve, 46. second reinforcement, 47. second inner cavity, 48. second optical fiber ribbon cavity, 5. optical fiber ribbon, 6. independent sleeve. DETAILED DESCRIPTION

[0039] Example 1: Figures 1 to 6 A high core density optical fiber ribbon cable comprises an outer sheath 1 and a tape layer 2, wherein the outer sheath 1 is located outside the tape layer 2, an inner sleeve body 3 and an outer sleeve body 4 are arranged inside the tape layer 2, the inner sleeve body 3 is composed of four first loose tubes 31 and a second loose tube 35, the four first loose tubes 31 are respectively located above, below, left and right of the second loose tube 35, and the distances between the four first loose tubes 31 and the second loose tube 35 are equal, the second loose tube 35 and each first loose tube 31 are connected by a first connecting component 33, a first reinforcement member 34 is arranged inside the first connecting component 33, and a first outer card slot 32 is arranged between two adjacent first loose tubes 31; The outer sleeve body 4 is composed of eight third loose tubes 41 and four fourth loose tubes 45. The four fourth loose tubes 45 are respectively located at four vertices of a square. A second inner cavity 47 is provided between the four fourth loose tubes 45. Two third loose tubes 41 are arranged on the upper side of the two fourth loose tubes 45 on the upper side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the lower side of the two fourth loose tubes 45 on the lower side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the left side of the two fourth loose tubes 45 on the left side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the right side of the two fourth loose tubes 45 on the right side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; A second reinforcement member 46 is disposed in the second connecting member 43; A first inner cavity 44 is provided between two adjacent fourth loose tubes 45 and two third loose tubes 41 on the same side, and the first inner cavity 44 communicates with the second inner cavity 47; A second outer slot 42 is provided between the fourth loose tube 45 and the two adjacent third loose tubes 41, and an independent tube 6 is provided in the second outer slot 42, and the independent tube 6 is attached to the second outer slot 42; The inner sleeve body 3 is located in the outer sleeve body 4, the first loose sleeve 31 is located in the corresponding first inner cavity 44, and the first loose sleeve 31 is in contact with the inner wall of the first inner cavity 44, the second loose sleeve 35 is located in the second inner cavity 47, and the third loose sleeve 41 is located in the corresponding first outer groove 32, and the third loose sleeve 41 is in contact with the inner wall of the corresponding first outer groove 32; At least one optical fiber ribbon 5 is disposed in each of the first loose tube 31 , the second loose tube 35 , the third loose tube 41 , the fourth loose tube 45 and the independent tube 6 .

[0040] Example 2: Figures 7 to 9 A high core density optical fiber ribbon cable, comprising an outer sheath 1 and a tape layer 2, wherein the outer sheath 1 is located outside the tape layer 2, an inner sleeve body 3 and an outer sleeve body 4 are arranged in the tape layer 2, the inner sleeve body 3 is composed of four first loose tubes 31 and a second loose tube 35, the four first loose tubes 31 are respectively located above, below, left and right of the second loose tube 35, and the distances between the four first loose tubes 31 and the second loose tube 35 are equal, the second loose tube 35 and each first loose tube 31 are connected by a first connecting component 33, a first optical fiber ribbon cavity 36 is arranged in the first connecting component 33, and a first outer card slot 32 is arranged between two adjacent first loose tubes 31; The outer sleeve body 4 is composed of eight third loose tubes 41 and four fourth loose tubes 45. The four fourth loose tubes 45 are respectively located at four vertices of a square. A second inner cavity 47 is provided between the four fourth loose tubes 45. Two third loose tubes 41 are arranged on the upper side of the two fourth loose tubes 45 on the upper side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the lower side of the two fourth loose tubes 45 on the lower side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the left side of the two fourth loose tubes 45 on the left side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the right side of the two fourth loose tubes 45 on the right side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; A second optical fiber ribbon cavity 48 is provided in the second connecting component 43; A first inner cavity 44 is provided between two adjacent fourth loose tubes 45 and two third loose tubes 41 on the same side, and the first inner cavity 44 communicates with the second inner cavity 47; A second outer slot 42 is provided between the fourth loose tube 45 and the two adjacent third loose tubes 41, and an independent tube 6 is provided in the second outer slot 42, and the independent tube 6 is attached to the second outer slot 42; The inner sleeve body 3 is located in the outer sleeve body 4, the first loose sleeve 31 is located in the corresponding first inner cavity 44, and the first loose sleeve 31 is in contact with the inner wall of the first inner cavity 44, the second loose sleeve 35 is located in the second inner cavity 47, and the third loose sleeve 41 is located in the corresponding first outer groove 32, and the third loose sleeve 41 is in contact with the inner wall of the corresponding first outer groove 32; At least one optical fiber ribbon 5 is disposed in each of the first loose tube 31 , the second loose tube 35 , the third loose tube 41 , the fourth loose tube 45 , the independent tube 6 , the first optical fiber ribbon cavity 36 and the second optical fiber ribbon cavity 48 .

[0041] Example 3: Reference Figures 7 to 9A high core density optical fiber ribbon cable, comprising an outer sheath 1 and a tape layer 2, wherein the outer sheath 1 is located outside the tape layer 2, an inner sleeve body 3 and an outer sleeve body 4 are arranged in the tape layer 2, the inner sleeve body 3 is composed of four first loose tubes 31 and a second loose tube 35, the four first loose tubes 31 are respectively located above, below, left and right of the second loose tube 35, and the distances between the four first loose tubes 31 and the second loose tube 35 are equal, the second loose tube 35 and each first loose tube 31 are connected by a first connecting component 33, a first optical fiber ribbon cavity 36 is arranged in the first connecting component 33, and a first outer card slot 32 is arranged between two adjacent first loose tubes 31; The outer sleeve body 4 is composed of eight third loose tubes 41 and four fourth loose tubes 45. The four fourth loose tubes 45 are respectively located at four vertices of a square. A second inner cavity 47 is provided between the four fourth loose tubes 45. Two third loose tubes 41 are arranged on the upper side of the two fourth loose tubes 45 on the upper side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the lower side of the two fourth loose tubes 45 on the lower side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the left side of the two fourth loose tubes 45 on the left side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; Two third loose tubes 41 are arranged on the right side of the two fourth loose tubes 45 on the right side, two adjacent third loose tubes 41 are connected via a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected via a second connecting component 43; A second optical fiber ribbon cavity 48 is provided in the second connecting component 43; A first inner cavity 44 is provided between two adjacent fourth loose tubes 45 and two third loose tubes 41 on the same side, and the first inner cavity 44 communicates with the second inner cavity 47; A second outer slot 42 is provided between the fourth loose tube 45 and two adjacent third loose tubes 41, an electric unit or a filling rope is provided in the second outer slot 42, the electric unit or the filling rope is attached to the second outer slot 42, and the electric unit is composed of a conductor and an insulating layer extruded outside the conductor; The inner sleeve body 3 is located in the outer sleeve body 4, the first loose sleeve 31 is located in the corresponding first inner cavity 44, and the first loose sleeve 31 is in contact with the inner wall of the first inner cavity 44, the second loose sleeve 35 is located in the second inner cavity 47, and the third loose sleeve 41 is located in the corresponding first outer groove 32, and the third loose sleeve 41 is in contact with the inner wall of the corresponding first outer groove 32; At least one optical fiber ribbon 5 is disposed in each of the first loose tube 31 , the second loose tube 35 , the third loose tube 41 , the fourth loose tube 45 , the first optical fiber ribbon cavity 36 and the second optical fiber ribbon cavity 48 .

[0042] In the above-mentioned high core density optical fiber ribbon cable, the material of the outer sheath 1 is polyethylene.

[0043] In the above-mentioned high core density optical fiber ribbon cable, the tape layer 2 is a steel tape or an aluminum tape or a water-blocking tape.

[0044] In the above-mentioned high core density optical fiber ribbon cable, the first loose tube 31, the second loose tube 35 and the first connecting component 33 are integrally formed and the material is polybutylene terephthalate.

[0045] In the above-mentioned high core density optical fiber ribbon cable, the third loose tube 41, the second connecting component 43 and the fourth loose tube 45 are integrally formed and the material is polybutylene terephthalate.

[0046] In the above-mentioned high core density optical fiber ribbon cable, the material of the independent sleeve 6 is polybutylene terephthalate.

[0047] In the above-mentioned high core density optical fiber ribbon cable, the optical fiber ribbon 5 is formed by at least two optical fibers being connected in parallel.

[0048] In the above-mentioned high core density optical fiber ribbon cable, the first reinforcement member 34 and the second reinforcement member 46 are steel wires or glass fiber reinforced plastic rods.

[0049] The present invention has the following beneficial effects: 1. The spacing between the sleeves is small, so that the adjacent sleeves are closer together, thereby increasing the core density of the optical fiber in the cable core in disguised form.

[0050] 2. The reinforcement member is located in the connecting component used for connecting the sleeves, and there is no need to reserve a separate space for placing the reinforcement member, which greatly increases the space available for placing the optical fiber ribbon.

[0051] 3. The strength members are distributed in the cable core, which improves the tensile performance of the optical cable, makes the force on the optical cable more uniform, further reduces the space of the cable core, and increases the core density of the optical fiber in the cable core.

[0052] 4. The sleeves in the inner sleeve body 3 and the outer sleeve body 4 are connected into a whole through connecting components, so that the inner sleeve body 3 and the outer sleeve body 4 can be integrally formed, which improves production efficiency and does not require the use of materials such as yarn for fixing, saving materials and reducing costs.

[0053] 5. The inner sleeve body 3 and the outer sleeve body 4 are mutually clamped and fixed, making the structure of the cable core more stable and compact. Even if the outer sleeve body 4 is damaged, the inner sleeve body 3 and the outer sleeve body 4 can still protect the mutually clamped structure.

[0054] 6. A first optical fiber ribbon cavity 36 and a second optical fiber ribbon cavity 48 may also be provided in the first connecting component 33 and the second connecting component 43, so as to further improve the core density of the optical fiber in the cable core.

[0055] 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 high core density optical fiber ribbon cable, comprising an outer sheath (1) and a cable core, characterized in that: The cable core is composed of an inner sleeve body (3) and an outer sleeve body (4); the inner sleeve body (3) is composed of four first loose sleeves (31) and one second loose sleeve (35); the four first loose sleeves (31) are respectively located above, below, left and right of the second loose sleeve (35); the second loose sleeve (35) and each first loose sleeve (31) are connected via a first connecting component (33); The outer sleeve body (4) is surrounded by eight third loose tubes (41) and four fourth loose tubes (45) to form a ring, one fourth loose tube (45) is arranged every two third loose tubes (41), the fourth loose tube (45) is recessed toward the center of the ring, two adjacent third loose tubes (41) are connected by a second connecting component (43), and adjacent third loose tubes (41) and fourth loose tubes (45) are connected by the second connecting component (43); The inner sleeve body (3) is located inside the outer sleeve body (4), and two adjacent fourth loose sleeves (45) and two third loose sleeves (41) between the two fourth loose sleeves (45) clamp a corresponding first loose sleeve (31); At least one optical fiber ribbon (5) is arranged in each of the first loose tube (31), the second loose tube (35), the third loose tube (41) and the fourth loose tube (45).

2. The high core density optical fiber ribbon cable according to claim 1, characterized in that: Four fourth loose tubes (45) are respectively located at four vertices of a square, and a second inner cavity (47) is provided between the four fourth loose tubes (45); Two adjacent fourth loose tubes (45) and two third loose tubes (41) between the two fourth loose tubes (45) are provided with a first inner cavity (44), and the first inner cavity (44) is communicated with a second inner cavity (47); The first loose tube (31) is located in the corresponding first inner cavity (44), and the first loose tube (31) is in contact with the inner wall of the first inner cavity (44); the second loose tube (35) is located in the second inner cavity (47); a first outer groove (32) is provided between two adjacent first loose tubes (31); the third loose tube (41) is located in the corresponding first outer groove (32), and the third loose tube (41) is in contact with the inner wall of the corresponding first outer groove (32).

3. The high core density optical fiber ribbon cable according to claim 2, characterized in that: A second outer slot (42) is provided between the fourth loose tube (45) and two adjacent third loose tubes (41), an independent tube (6) or an electrical unit or a filling rope is provided in the second outer slot (42), and the independent tube (6) or the electrical unit or the filling rope is attached to the second outer slot (42).

4. The high core density optical fiber ribbon cable according to claim 3, characterized in that: At least one optical fiber ribbon (5) is arranged in the independent sleeve (6).

5. The high core density optical fiber ribbon cable according to claim 4, characterized in that: A first optical fiber ribbon cavity (36) is provided in the first connecting component (33), and at least one optical fiber ribbon (5) is provided in the first optical fiber ribbon cavity (36).

6. The high core density optical fiber ribbon cable according to claim 5, characterized in that: A second optical fiber ribbon cavity (48) is provided in the second connecting component (43), and at least one optical fiber ribbon (5) is provided in the second optical fiber ribbon cavity (48).

7. The high core density optical fiber ribbon cable according to claim 4, characterized in that: A first reinforcing member (34) is arranged inside the first connecting member (33).

8. The high core density optical fiber ribbon cable according to claim 7, characterized in that: A second reinforcing member (46) is disposed inside the second connecting member (43).

9. The high core density optical fiber ribbon cable according to any one of claims 5 to 8, characterized in that: The first loose tube (31), the second loose tube (35) and the first connecting component (33) are integrally formed.

10. The high core density optical fiber ribbon cable according to any one of claims 5 to 8, characterized in that: The third loose tube (41), the second connecting component (43) and the fourth loose tube (45) are integrally formed.

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