A high fiber core density fiber ribbon optical cable

Abstract

The present invention belongs to the technical field of optical fiber cables, and discloses a high fiber core density fiber ribbon optical cable, which has an outer sheath 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 inside the outer sleeve body, and the inner sleeve body and the outer sleeve body are fixedly connected by mutual clamping; at least one fiber ribbon is provided in both the inner sleeve body and the outer sleeve body; the present invention has the beneficial effects of simple structure, large fiber core density, good tensile performance, high production efficiency, and stable structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical fiber cables, and particularly relates to a high fiber core density fiber ribbon optical cable. Background Art

[0002] With the continuous growth of the demand for broadband and high-speed access, the demand for high density of optical fibers in the same cable is increasing day by day.

[0003] In the prior art, for example, CN119024508A discloses a combined fiber ribbon optical cable, which has an outer sheath. A first combined unit and four second combined units are arranged inside the outer sheath. The first combined unit is composed of four sub-units. Each sub-unit is successively connected by a connecting rib, a first loose tube and a first strengthening member sheath. The connecting ribs of the four sub-units point to the same center. A clamping groove is formed between two adjacent first loose tubes. The second combined unit is composed of a first protection plate and a second loose tube. At least one fiber ribbon is arranged inside the first loose tube and the second loose tube. The second loose tubes of the four second combined units are respectively clamped into the corresponding clamping grooves on one side.

[0004] The above prior art has the following deficiencies: 1. The fiber core density is relatively low; 2. The tensile property is relatively poor; 3. The structure is not compact. Summary of the Invention

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

[0006] A high fiber core density fiber ribbon optical cable has an outer sheath and a cable core. The cable core is composed of an inner sleeve body and an outer sleeve body. The inner sleeve body is composed of four first loose tubes and one second loose tube. The four first loose tubes are respectively located above, below, left and right of the second loose tube. The second loose tube and each first loose tube are connected by a first connecting member.

[0007] The outer sleeve body is formed by enclosing a ring with eight third loose tubes and four fourth loose tubes. One fourth loose tube is arranged every two third loose tubes. The fourth loose tube is recessed towards the center of the ring. Two adjacent third loose tubes are connected by a second connecting member. An adjacent third loose tube and a fourth loose tube are connected by a second connecting member.

[0008] The inner sleeve body is located inside the outer sleeve body. Two adjacent fourth loose tubes and two third loose tubes between the two fourth loose tubes clamp a corresponding first loose tube.

[0009] At least one fiber ribbon is arranged inside the first loose tube, the second loose tube, the third loose tube and the fourth loose tube.

[0010] A high fiber core density fiber ribbon optical cable as described above, four fourth loose tubes are respectively located at the four vertices of a square, and a second inner cavity is provided between the four fourth loose tubes;

[0011] An inner cavity is provided between two adjacent fourth loose tubes and the two third loose tubes between the two fourth loose tubes, and the inner cavity communicates with the second inner cavity;

[0012] The first loose tube is located in the corresponding inner cavity, and the first loose tube is in contact with the inner wall of the inner cavity. The second loose tube is located in the second inner cavity. An outer card slot is provided between two adjacent first loose tubes. The third loose tube is located in the corresponding outer card slot, and the third loose tube is in contact with the inner wall of the corresponding outer card slot.

[0013] A second outer card slot is provided between the fourth loose tube and two adjacent third loose tubes. An independent tube or an electrical unit or a filling rope is provided in the second outer card slot, and the independent tube or the electrical unit or the filling rope is in contact with the second outer card slot.

[0014] At least one fiber ribbon is provided in the independent tube.

[0015] A first fiber ribbon cavity is provided in the first connecting component, and at least one fiber ribbon is provided in the first fiber ribbon cavity.

[0016] A second fiber ribbon cavity is provided in the second connecting component, and at least one fiber ribbon is provided in the second fiber ribbon cavity.

[0017] A first strengthening member is provided in the first connecting component.

[0018] A second strengthening member is provided in the second connecting component.

[0019] The distances between the four first loose tubes and the second loose tube are equal.

[0020] A wrapping layer is provided between the outer sheath and the cable core.

[0021] The material of the outer sheath is polyethylene.

[0022] The wrapping layer is a steel strip or an aluminum strip or a water blocking tape.

[0023] 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.

[0024] 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.

[0025] In the above-mentioned high core density optical fiber ribbon cable, the material of the independent sleeve is polybutylene terephthalate.

[0026] The optical fiber ribbon cable with high fiber core density described above is formed by at least two optical fibers being connected in parallel.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0035] Figure 2 It is a front view of embodiment 1 of the present invention.

[0036] Figure 3 It is a schematic three-dimensional structure diagram of a section of the inner sleeve body of Embodiment 1 of the present invention.

[0037] Figure 4 It is the front view of the inner sleeve body of Embodiment 1 of the present invention.

[0038] Figure 5 It is a schematic three-dimensional structure diagram of a section of the outer sleeve body of Embodiment 1 of the present invention.

[0039] Figure 6 It is the front view of the outer sleeve body of Embodiment 1 of the present invention.

[0040] Figure 7 It is the front view of Embodiment 2 of the present invention.

[0041] Figure 8 It is the front view of the inner sleeve body of Embodiment 2 of the present invention.

[0042] Figure 9 It is the front view of the outer sleeve body of Embodiment 2 of the present invention.

[0043] In the figure: 1. Outer protective layer, 2. Tape layer, 3. Inner sleeve body, 31. First loose tube, 32. First outer card slot, 33. First connecting component, 34. First strengthening member, 35. Second loose tube, 36. First optical fiber ribbon cavity, 4. Outer sleeve body, 41. Third loose tube, 42. Second outer card slot, 43. Second connecting component, 44. First inner cavity, 45. Fourth loose tube, 46. Second strengthening member, 47. Second inner cavity, 48. Second optical fiber ribbon cavity, 5. Optical fiber ribbon, 6. Independent sleeve. Detailed implementation manners

[0044] Embodiment 1: As Figures 1 to 6 , a high-core-density optical fiber ribbon cable has an outer protective layer 1 and a tape layer 2. The outer protective layer 1 is located outside the tape layer 2. Inside the tape layer 2, there are an inner sleeve body 3 and an outer sleeve body 4. The inner sleeve body 3 consists of four first loose tubes 31 and one 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. Inside the first connecting component 33, there is a first strengthening member 34. Between two adjacent first loose tubes 31, there is a first outer card slot 32;

[0045] 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 the four vertices of a square. There is a second inner cavity 47 between the four fourth loose tubes 45;

[0046] On the upper side of the two fourth loose tubes 45 on the upper side, there are two third loose tubes 41. Adjacent two third loose tubes 41 are connected by a second connecting component 43, and adjacent fourth loose tube 45 and third loose tube 41 are connected by the second connecting component 43;

[0047] On the lower side of the two fourth loose tubes 45 on the lower side, there are two third loose tubes 41. Adjacent two third loose tubes 41 are connected by a second connecting component 43, and adjacent fourth loose tube 45 and third loose tube 41 are connected by the second connecting component 43;

[0048] On the left side of the two fourth loose tubes 45 on the left side, there are two third loose tubes 41. Adjacent two third loose tubes 41 are connected by a second connecting component 43, and adjacent fourth loose tube 45 and third loose tube 41 are connected by the second connecting component 43;

[0049] On the right side of the two fourth loose tubes 45 on the right side, there are two third loose tubes 41. Adjacent two third loose tubes 41 are connected by a second connecting component 43, and adjacent fourth loose tube 45 and third loose tube 41 are connected by the second connecting component 43;

[0050] There is a second reinforcing member 46 inside the second connecting component 43;

[0051] There is a first inner cavity 44 between adjacent two 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;

[0052] There is a second outer card slot 42 between the fourth loose tube 45 and adjacent two third loose tubes 41. There is an independent tube 6 inside the second outer card slot 42, and the independent tube 6 is in contact with the second outer card slot 42;

[0053] The inner tube body 3 is located inside the outer tube body 4. The first loose tube 31 is located inside 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 inside the second inner cavity 47. The third loose tube 41 is located inside the corresponding first outer card slot 32, and the third loose tube 41 is in contact with the inner wall of the corresponding first outer card slot 32;

[0054] There is at least one fiber ribbon 5 inside 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.

[0055] Embodiment 2: As Figures 7 to 9, a high fiber core density fiber ribbon optical cable, having an outer sheath 1 and a tape layer 2, the outer sheath 1 is located outside the tape layer 2, and an inner sleeve body 3 and an outer sleeve body 4 are provided inside the tape layer 2. The inner sleeve body 3 consists of four first loose tubes 31 and one 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 member 33. A first fiber ribbon cavity 36 is provided inside the first connecting member 33. A first outer card slot 32 is provided between two adjacent first loose tubes 31;

[0056] 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 the four top corners of a square, and a second inner cavity 47 is provided between the four fourth loose tubes 45;

[0057] Two third loose tubes 41 are provided above the two fourth loose tubes 45 on the upper side. Two adjacent third loose tubes 41 are connected by a second connecting member 43, and an adjacent fourth loose tube 45 and a third loose tube 41 are connected by the second connecting member 43;

[0058] Two third loose tubes 41 are provided below the two fourth loose tubes 45 on the lower side. Two adjacent third loose tubes 41 are connected by a second connecting member 43, and an adjacent fourth loose tube 45 and a third loose tube 41 are connected by the second connecting member 43;

[0059] Two third loose tubes 41 are provided on the left side of the two fourth loose tubes 45 on the left side. Two adjacent third loose tubes 41 are connected by a second connecting member 43, and an adjacent fourth loose tube 45 and a third loose tube 41 are connected by the second connecting member 43;

[0060] Two third loose tubes 41 are provided on the right side of the two fourth loose tubes 45 on the right side. Two adjacent third loose tubes 41 are connected by a second connecting member 43, and an adjacent fourth loose tube 45 and a third loose tube 41 are connected by the second connecting member 43;

[0061] A second fiber ribbon cavity 48 is provided inside the second connecting member 43;

[0062] 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;

[0063] A second outer card slot 42 is provided between the fourth loose tube 45 and two adjacent third loose tubes 41. An independent sleeve 6 is provided inside the second outer card slot 42, and the independent sleeve 6 is attached to the second outer card slot 42;

[0064] The inner sleeve body 3 is located inside the outer sleeve body 4. The first loose tube 31 is located inside 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 inside the second inner cavity 47. The third loose tube 41 is located inside the corresponding first outer card slot 32, and the third loose tube 41 is in contact with the inner wall of the corresponding first outer card slot 32;

[0065] There is at least one fiber ribbon 5 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 fiber ribbon cavity 36, and the second fiber ribbon cavity 48.

[0066] Example 3: Refer to Figures 7 to 9 , a high fiber core density fiber ribbon optical cable, having an outer sheath 1 and a wrapping layer 2. The outer sheath 1 is located outside the wrapping layer 2. The inner sleeve body 3 and the outer sleeve body 4 are provided inside the wrapping layer 2. The inner sleeve body 3 consists of four first loose tubes 31 and one 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 member 33. A first fiber ribbon cavity 36 is provided inside the first connecting member 33. A first outer card slot 32 is provided between two adjacent first loose tubes 31;

[0067] 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 the four vertices of a square. A second inner cavity 47 is provided between the four fourth loose tubes 45;

[0068] Two third loose tubes 41 are provided above the upper two fourth loose tubes 45. Two adjacent third loose tubes 41 are connected by a second connecting member 43. An adjacent fourth loose tube 45 and a third loose tube 41 are connected by a second connecting member 43;

[0069] Two third loose tubes 41 are provided below the lower two fourth loose tubes 45. Two adjacent third loose tubes 41 are connected by a second connecting member 43. An adjacent fourth loose tube 45 and a third loose tube 41 are connected by a second connecting member 43;

[0070] Two third loose tubes 41 are provided on the left side of the left two fourth loose tubes 45. Two adjacent third loose tubes 41 are connected by a second connecting member 43. An adjacent fourth loose tube 45 and a third loose tube 41 are connected by a second connecting member 43;

[0071] On the right side of the two fourth loose tubes 45 on the right, there are two third loose tubes 41. Adjacent third loose tubes 41 are connected by a second connecting component 43, and adjacent fourth loose tubes 45 and third loose tubes 41 are connected by the second connecting component 43;

[0072] The second connecting component 43 is provided with a second optical fiber ribbon cavity 48;

[0073] There is a first inner cavity 44 between adjacent two fourth loose tubes 45 and the two third loose tubes 41 on the same side, and the first inner cavity 44 communicates with the second inner cavity 47;

[0074] There is a second outer card slot 42 between the fourth loose tube 45 and the adjacent two third loose tubes 41. An electrical unit or a filling cord is arranged in the second outer card slot 42, and the electrical unit or the filling cord is in contact with the second outer card slot 42. The electrical unit is composed of a conductor and an insulating layer extruded outside the conductor;

[0075] The inner sleeve body 3 is located inside the outer sleeve body 4. The first loose tube 31 is located in the corresponding first inner cavity 44 and 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. The third loose tube 41 is located in the corresponding first outer card slot 32 and is in contact with the inner wall of the corresponding first outer card slot 32;

[0076] There is at least one optical fiber ribbon 5 in 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.

[0077] For a high fiber core density optical fiber ribbon optical cable as described above, the material of the outer sheath 1 is polyethylene.

[0078] For a high fiber core density optical fiber ribbon optical cable as described above, the wrapping layer 2 is a steel tape or an aluminum tape or a water blocking tape.

[0079] For a high fiber core density optical fiber ribbon optical cable as described above, 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.

[0080] For a high fiber core density optical fiber ribbon optical cable as described above, 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.

[0081] For a high fiber core density optical fiber ribbon optical cable as described above, the material of the independent sleeve 6 is polybutylene terephthalate.

[0082] For a high fiber core density optical fiber ribbon optical cable as described above, the optical fiber ribbon 5 is formed by combining at least two optical fibers.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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 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 fiber core density fiber ribbon optical cable, having 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) has four first loose tubes (31) and one second loose tube (35). The four first loose tubes (31) are respectively located above, below, left, and right of the second loose tube (35). The second loose tube (35) and each first loose tube (31) are connected by a first connecting member (33). The outer sleeve body (4) is composed of eight third loose tubes (41) and four fourth loose tubes (45) and forms a ring. One fourth loose tube (45) is arranged every two third loose tubes (41). The fourth loose tubes (45) are recessed towards the center of the ring. Adjacent two third loose tubes (41) are connected by a second connecting member (43). Adjacent third loose tube (41) and fourth loose tube (45) are connected by a second connecting member (43). The inner sleeve body (3) is located inside the outer sleeve body (4). Adjacent two fourth loose tubes (45) and two third loose tubes (41) between the two fourth loose tubes (45) clamp a corresponding first loose tube (31). At least one 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). A second outer card slot (42) is arranged between the fourth loose tube (45) and two adjacent third loose tubes (41). An independent tube (6) attached to the second outer card slot (42) is arranged in the second outer card slot (42). At least one fiber ribbon (5) is arranged in the independent tube (6). The four fourth loose tubes (45) are respectively located at the four vertices of a square. A second inner cavity (47) is arranged between the four fourth loose tubes (45). A first inner cavity (44) is arranged between adjacent two fourth loose tubes (45) and two third loose tubes (41) between the two fourth loose tubes (45). The first inner cavity (44) communicates with the 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 attached to 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 card slot (32) is arranged between adjacent two first loose tubes (31). The fourth loose tube (45) is located in the corresponding first outer card slot (32), and the fourth loose tube (45) is attached to the inner wall of the corresponding first outer card slot (32). The third loose tube (41), the second connecting member (43), and the fourth loose tube (45) are integrally formed.

2. The high-fiber-core-density fiber ribbon optical cable according to claim 1, characterized in that: A first fiber ribbon cavity (36) is arranged in the first connecting member (33). At least one fiber ribbon (5) is arranged in the first fiber ribbon cavity (36).

3. A high fiber core density fiber ribbon optical cable according to claim 2, characterized in that: A second fiber ribbon cavity (48) is arranged in the second connecting member (43). At least one fiber ribbon (5) is arranged in the second fiber ribbon cavity (48).

4. A high fiber core density fiber ribbon optical cable according to claim 3, characterized in that: A first reinforcing member (34) is arranged in the first connecting member (33).

5. A high fiber core density fiber ribbon optical cable according to claim 4, characterized in that: A second reinforcing member (46) is arranged in the second connecting member (43).

6. A high-fiber-core density fiber ribbon optical cable according to any one of claims 2 to 5, characterized in that: The first loose tube (31), the second loose tube (35) and the first connecting component (33) are integrally formed.

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