Fiber optic ribbon cable and assembly method for fiber optic ribbon cable

Abstract

The present invention belongs to the field of optical cables. Disclosed is a fiber optic ribbon cable, which is provided with n identical fiber optic ribbon components (2) and an outer sheath; and which is characterized in that the cross section of an outer edge of each fiber optic ribbon component is an isosceles trapezoid, all the fiber optic ribbon components are arranged in a row to form row-shaped components, and outer edges of side wall bodies at joints of adjacent fiber optic ribbon components are aligned; in the row-shaped components, bottom edges of the adjacent fiber optic ribbon components are aligned, there is a long bottom edge and a short bottom edge on each side of the fiber optic ribbon component, and the outer sheath wraps the row-shaped components; and the cross sections of the outer edges of the row-shaped components and the cross section of the outer edge of the outer sheath are all in a parallelogram shape or are in an isosceles trapezoid shape. Further disclosed in the present invention is an assembly method for a fiber optic ribbon cable. The present invention has the following main beneficial technical effects: the fiber optic ribbon cable has a simple structure and is easy to manufacture and assemble, the core number of the optical cable is variable, the fiber optic ribbon components can be used in optical cables of different structures, and the fiber-core density of an optical fiber is higher.

Description

Optical fiber ribbon cable and assembly method of optical fiber ribbon cable Technical Field

[0001] The invention belongs to the field of optical cables, and in particular discloses an optical fiber ribbon cable and an assembly method of the optical fiber ribbon cable. Background Art

[0002] CN215833665U discloses a cable core and an optical fiber ribbon cable with a fan-shaped loose tube structure. The cable core with the fan-shaped loose tube structure includes a plurality of single ribbon-shaped loose tubes arranged in a fan shape. Adjacent single ribbon-shaped loose tubes are connected at the fan-shaped corners to form a ribbon-shaped loose tube body with a circular cross-section. A central reinforcement member is arranged inside the ribbon-shaped loose tube body. The optical fiber ribbon cable includes an outer sheath, a metal belt and a cable core with a fan-shaped loose tube structure. The metal belt is coated on the outer periphery of the cable core with the fan-shaped loose tube structure, and the outer sheath is arranged on the outer periphery of the metal belt.

[0003] CN208833968U discloses a dry-type fan-shaped tube layer stranded optical cable, which includes a central reinforcement member and multiple loose tubes with fan-shaped cross sections. The multiple loose tubes are spliced ​​together and wrapped around the outer periphery of the central reinforcement member to form a circular cable core. The cable core is coated with a layer of water-blocking tape, and the water-blocking tape is coated with an outer sheath. The loose tubes are filled with water-blocking fibers, and each loose tube is provided with multiple optical fibers.

[0004] CN105405491A discloses an overhead insulated cable with high conductivity and good protective effect. The invention comprises an upper polyethylene sheath and a lower polyethylene sheath, which are connected by vertical connecting ribs. The upper polyethylene sheath is larger in size and volume than the lower polyethylene sheath. The key structural features of the cable are as follows: the inner side of the upper polyethylene sheath comprises, from inside to outside, a duralumin stranded layer and a semiconducting layer, wherein the duralumin stranded layer is composed of multiple duralumin strands with isosceles trapezoidal longitudinal cross-sections, seamlessly and tightly interlaced in a radial pattern; the inner side of the lower polyethylene sheath is provided with a water-blocking layer, within which multiple loose tubes are disposed, and optical fibers are disposed within the loose tubes. Technical issues

[0005] In the above-mentioned prior art, there is the loose tube of fan-shaped structure, but its outer edge and inner edge are all fan-shaped, are suitable for layer-twisted type, circular structure optical cable.But in reality, some space is irregular, as parallelogram, trapezoidal etc., pipeline also has parallelogram, trapezoidal, circular tube etc., when optical cable of the prior art is placed in parallelogram, trapezoidal pipeline and space, with surface line contact, unstable, and space utilization rate is low, and, optical cable of the above-mentioned prior art, can't change the fiber core density or the fiber core quantity of optical fiber, after taking also part loose tube, structure is unstable, can only produce the optical cable that forms a certain structure, so the application of loose tube is greatly restricted. Technical Solutions

[0006] To solve the above problems, the purpose of the present invention is to disclose an optical fiber ribbon cable and an assembly method of the optical fiber ribbon cable, which are achieved by adopting the following technical solutions.

[0007] A fiber optic ribbon cable having n identical fiber optic ribbon components and an outer sheath, characterized in that: the cross-section of the outer edge of the fiber optic ribbon component is an isosceles trapezoid; the fiber optic ribbon component is composed of an outer wall, a first side wall, an inner wall, a second side wall, and a fiber optic ribbon; the outer wall, the first side wall, the inner wall, and the second side wall form a closed structure; the outer wall is located on the outside, the inner wall is located on the inside, the first side wall and the second side wall are located on both sides; the fiber optic ribbon component has a cavity inside; the outer surface of the outer wall is the outer edge of the outer wall, the outer surface of the outer wall is a plane, the outer surface of the inner wall is the outer edge of the inner wall, and the outer surface of the inner wall is a plane. The outer surface of the first side wall is the outer edge of the first side wall, the outer surface of the first side wall is a plane, the outer surface of the second side wall is the outer edge of the second side wall, the outer surface of the second side wall is a plane, the length of the outer edge of the outer wall is greater than the length of the outer edge of the inner wall, the angle formed by the outer edge of the first side wall and the outer edge of the second side wall extending and intersecting is the central angle, the optical fiber ribbon is composed of multiple optical fibers and an adhesive layer covering all the optical fibers, the optical fiber ribbon is located in the cavity, and the central angle is equal to 360 / n degrees; the first side wall and the second side wall are collectively referred to as the side wall body, and the outer edge of the first side wall and the outer edge of the second side wall are collectively referred to as the outer edge of the side wall body; All optical fiber ribbon components are arranged in a row to form a row-like component. The outer edges of the side walls of adjacent optical fiber ribbon components at their joints are aligned. In the row-like component, adjacent optical fiber ribbon components have: a first side extending from the outer edge of the inner wall of one optical fiber ribbon component to the outer edge of the outer wall of another optical fiber ribbon component; a second side extending from the outer edge of the outer wall of one optical fiber ribbon component to the outer edge of the inner wall of another optical fiber ribbon component. Both outer edges of the row-like component are flat, and an outer sheath is wrapped around the outer edge of the row-like component. Here, n is a positive integer not less than 2. When n is greater than or equal to a positive even number, the cross-sections of the outer edges of the row-like component and the outer edges of the outer sheath are both parallelograms. When n is greater than or equal to a positive odd number, the cross-sections of the outer edges of the row-like component and the outer edges of the outer sheath are both isosceles trapezoids.

[0008] The optical fiber ribbon cable described above is characterized by having at least two identical row-shaped components, all of which are assembled to form a parallelogram-shaped row-shaped composite component, and the outer sheath is wrapped around the row-shaped composite component, and the cross-section of the outer edge of the outer sheath is a parallelogram.

[0009] A method for assembling an optical fiber ribbon cable, characterized in that the assembly method comprises the following steps:

[0010] The first step: take n optical fiber ribbon components; the cross-section of the outer edge of the optical fiber ribbon component is an isosceles trapezoid, the optical fiber ribbon component is composed of an outer wall, a first side wall, an inner wall, a second side wall, and an optical fiber ribbon, the outer wall, the first side wall, the inner wall, and the second side wall form a closed structure, the outer wall is located on the outside, the inner wall is located on the inside, the first side wall and the second side wall are located on both sides, the optical fiber ribbon component has a cavity inside, the outer surface of the outer wall is the outer edge of the outer wall, the outer surface of the outer wall is a plane, the outer surface of the inner wall is the outer edge of the inner wall, the outer surface of the inner wall is a plane, the outer surface of the first side wall is the outer edge of the first side wall, the outer surface of the first side wall is a plane, the outer surface of the second side wall is the outer edge of the second side wall, the outer surface of the second side wall is a plane, the length of the outer edge of the outer wall is greater than the length of the outer edge of the inner wall, the angle formed by the outer edge of the first side wall and the outer edge of the second side wall extending and intersecting is the central angle, the optical fiber ribbon is composed of multiple optical fibers and an adhesive layer covering all the optical fibers, the optical fiber ribbon is located in the cavity, and the central angle is equal to 360 / n degrees; the first side wall and the second side wall are collectively referred to as the side wall body, and the outer edge of the first side wall and the outer edge of the second side wall are collectively referred to as the outer edge of the side wall body;

[0011] Step 2: Arrange all optical fiber ribbon components in a row to form a row-shaped component, align the outer edges of the side walls of adjacent optical fiber ribbon components, and align the first side of the adjacent optical fiber ribbon components to the outer edge of the inner wall of one optical fiber ribbon component and the outer edge of the outer wall of the other optical fiber ribbon component, so that the first side is on the first side plane, and then align the second side of the adjacent optical fiber ribbon components to the outer edge of the outer wall of one optical fiber ribbon component and the outer edge of the inner wall of the other optical fiber ribbon component, so that the second side is on the second side plane, so that the first side plane is parallel to the second side plane, and repeat the above operation until all optical fiber ribbon components are arranged;

[0012] Step 3: Pass the row-shaped component formed in the second step through the inner hole of the elastic plastic sleeve, so that the wall of the elastic plastic sleeve tightly covers the outside of the row-shaped component. After the covering is completed, the plastic sleeve becomes the outer sheath. When the number of optical fibers needs to be reduced, the optical fiber ribbon component to be reduced is removed from one end of the row-shaped component. The elastic plastic sleeve shrinks and still tightly covers the outside of the row-shaped component to form a new outer sheath, completing the assembly of the optical fiber ribbon cable;

[0013] Wherein, n is a positive integer. When n≥ and is an even number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both parallelograms; when n≥ and is an odd number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both isosceles trapezoids. Beneficial effects

[0014] The present invention has the following main beneficial technical effects: simple structure, easy manufacture and assembly, variable number of cores in the optical cable, optical fiber ribbon components that can be used in optical cables with different structures, and higher optical fiber core density. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of the three-dimensional structure of a dissected section of Embodiment 1 of the present invention.

[0016] FIG2 is a schematic diagram of the cross-sectional structure of FIG1 on an enlarged scale.

[0017] FIG3 is a schematic diagram of the three-dimensional structure of a section of the optical fiber ribbon component used in Example 1.

[0018] FIG4 is an enlarged cross-sectional structural schematic diagram of FIG3 .

[0019] FIG5 is a schematic diagram of the three-dimensional structure of a section of the optical fiber ribbon component used in Example 2.

[0020] .Figure 6 is an enlarged schematic diagram of the cross-sectional structure of Figure 5.

[0021] FIG. 7 is a schematic diagram showing the cross-sectional structure of the optical fiber ribbon component used in Example 3.

[0022] FIG8 is a schematic diagram of the cross-sectional structure of the cable core in Example 4.

[0023] FIG9 is a schematic diagram of the cross-sectional structure of the cable core in Example 5.

[0024] FIG10 is a schematic diagram of the cross-sectional structure of the cable core in Example 6.

[0025] FIG11 is a schematic diagram of the cross-sectional structure of the cable core in Implementation Example 7.

[0026] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now explained in detail in conjunction with the drawings in the specification.

[0027] In the figure: 1—central reinforcement member, 2—optical fiber ribbon component, 3—protective layer, 4—outer jacket, 21—outer wall, 22—first side wall, 23—inner wall, 24—second side wall, 25—adhesive layer, 26—optical fiber, 211—outer edge of the outer wall, 221—outer edge of the first side wall, 231—outer edge of the inner wall, 241—outer edge of the second side wall, β—central angle. Best Mode for Carrying Out the Invention

[0028] Implementation Example 1: See Figures 1 to 4, an optical fiber ribbon cable, comprising a central reinforcement member 1, n identical optical fiber ribbon components 2 distributed outside the central reinforcement member, a protective layer 3 covering all optical fiber ribbon components, and an outer sheath 4 located outside the protective layer, wherein n is a positive integer not less than three; characterized in that: the cross-section of the outer edge of the optical fiber ribbon component 2 is a fan-shaped with the top corner removed, the optical fiber ribbon component is composed of an outer wall body 21, a first side wall body 22, an inner wall body 23, a second side wall body 24, and an optical fiber ribbon, the outer wall body 21, the first side wall body 22, the inner wall body 23, and the second side wall body 24 form a closed structure, the outer wall body 21 is located on the outside, the inner wall body 23 is located on the inside, the first side wall body 22 and the second side wall body 24 are located on both sides, the optical fiber ribbon component has a cavity inside, the outer wall body The outer surface of 21 is the outer edge 211 of the outer wall body, the outer surface of the inner wall body 23 is the outer edge 231 of the inner wall body, the outer surface of the first side wall body 22 is the outer edge 221 of the first side wall body, and the outer surface of the second side wall body 24 is the outer edge 241 of the second side wall body. The angle formed by the outer edge 221 of the first side wall body and the outer edge 241 of the second side wall body extending and intersecting is the central angle β. The optical fiber ribbon is composed of multiple optical fibers 26 and an adhesive layer 25 that covers all the optical fibers. The optical fiber ribbon is located in the cavity, and the central angle β=360 / n degrees; the outer edge 231 of the inner wall body of the optical fiber ribbon component 2 is in close contact with the outer edge of the central reinforcement component. The outer edges 231 of the inner walls of all optical fiber ribbon components 2 just cover the outer edge of the central reinforcement component. The outer edges 211 of the outer walls of all optical fiber ribbon components 2 are on the same cylindrical surface. Modes for Carrying Out the Invention

[0029] Implementation Example 2: See Figures 5 and 6, and refer to Figures 1 to 4. A fiber optic ribbon cable is basically the same as Implementation Example 1, except that: the outer edge 211 of the outer wall is a plane, and the outer edge 211 of the outer wall of all fiber optic ribbon components 2 is on the outer surface of the same regular N prism, where N is a positive integer not less than three, N=n.

[0030] Implementation Example 3: See Figure 7 and refer to Figures 1 to 6. A fiber optic ribbon cable is basically the same as Implementation Example 2, except that: the outer edge 231 of the inner wall is a plane, and the outer edges 231 of the inner walls of all fiber optic ribbon components 2 are on the outer surface of the same regular M prism, M is a positive integer not less than three, the central axis of the regular M prism coincides with the central axis of the regular N prism, and the diameter of the circumscribed circle of the cross section of the regular M prism is smaller than the diameter of the circumscribed circle of the cross section of the regular N prism. In this implementation example, the outer edge 231 of the inner wall is tangent to the outer surface of the central reinforcement.

[0031] In this embodiment, the cross-section of the outer edge of the optical fiber ribbon component 2 is an isosceles trapezoid, the outer surface of the outer wall body 21 is the outer edge 211 of the outer wall body, and the outer surface of the outer wall body 21 is a plane, the outer surface of the inner wall body 23 is the outer edge 231 of the inner wall body, and the outer surface of the inner wall body 23 is a plane, the outer surface of the first side wall body 22 is the outer edge 221 of the first side wall body, and the outer surface of the first side wall body 22 is a plane, the outer surface of the second side wall body 24 is the outer edge 241 of the second side wall body, and the outer surface of the second side wall body 24 is a plane.

[0032] In any of the above-mentioned embodiments, since the optical fiber ribbon component 2 other than the optical fiber ribbon is a symmetrical structure, in the following description, the first side wall body 22 and the second side wall body 24 can be collectively referred to as the side wall body, and the outer edge 221 of the first side wall body and the outer edge 241 of the second side wall body can be collectively referred to as the outer edge of the side wall body.

[0033] Implementation Example 4: See Figure 8 and refer to Figures 1 to 7. A fiber optic ribbon cable has A fiber optic ribbon components 2 and outer sheaths described in Implementation Example 3. All fiber optic ribbon components are arranged in a row to form a row component. The outer edges of the side walls of adjacent fiber optic ribbon components at the junction are aligned. In the row component, adjacent fiber optic ribbon components: the first side is the outer edge 231 of the inner wall of one fiber optic ribbon component and the outer edge 211 of the outer wall of another fiber optic ribbon component; the second side is the outer edge 211 of the outer wall of one fiber optic ribbon component and the outer edge 231 of the inner wall of another fiber optic ribbon component. The outer edges on both sides of the row component are flat, the outer sheath is covered on the outside of the row component, and the cross-section of the outer edge of the row component is a parallelogram, wherein A is a positive even number, A≥2.

[0034] Implementation Example 5: See Figure 9 and refer to Figures 1 to 8. A fiber optic ribbon cable has B fiber optic ribbon components 2 and outer sheaths described in Implementation Example 3. All fiber optic ribbon components are arranged in a row to form a row component. The outer edges of the side walls of adjacent fiber optic ribbon components at the junction are aligned. In the row component, adjacent fiber optic ribbon components: the first side is the outer edge 231 of the inner wall of one fiber optic ribbon component and the outer edge 211 of the outer wall of another fiber optic ribbon component; the second side is the outer edge 211 of the outer wall of one fiber optic ribbon component and the outer edge 231 of the inner wall of another fiber optic ribbon component. The outer edges on both sides of the row component are flat, the outer sheath is covered on the outside of the row component, and the cross-section of the outer edge of the row component is an isosceles trapezoid, wherein B is a positive odd number, B≥3.

[0035] Implementation Example 6: See Figure 10, and refer to Figures 1 to 9, and refer to Implementation Example 4, a fiber optic ribbon cable, having two row-shaped components described in Implementation Example 4, all row-shaped components are spliced ​​together to form a parallelogram-shaped row-shaped composite component, and the outer sheath is covered on the outside of the row-shaped composite component.

[0036] Implementation Example 7: See Figure 11, and refer to Figures 1 to 10, and refer to Implementation Example 4, a fiber optic ribbon cable, having the three row-like components described in Implementation Example 4, all of which are spliced ​​together to form a parallelogram-shaped row-like composite component, and the outer sheath is covered on the outside of the row-like composite component.

[0037] Furthermore, an optical fiber ribbon cable may also have a plurality of row-shaped components as described in Example 4, wherein all the row-shaped components are assembled to form a parallelogram-shaped row-shaped composite component, and the outer sheath is coated on the outside of the row-shaped composite component.

[0038] A method for assembling an optical fiber ribbon cable, characterized in that the assembly method comprises the following steps:

[0039] Step 1: Take D optical fiber ribbon components described in Example 3;

[0040] Step 2: Arrange all optical fiber ribbon components in a row to form a row-shaped component, align the outer edges of the side walls of adjacent optical fiber ribbon components, and align the first side of the adjacent optical fiber ribbon components to the outer edge of the inner wall of one optical fiber ribbon component and the outer edge of the outer wall of the other optical fiber ribbon component, so that the first side is on the first side plane, and then align the second side of the adjacent optical fiber ribbon components to the outer edge of the outer wall of one optical fiber ribbon component and the outer edge of the inner wall of the other optical fiber ribbon component, so that the second side is on the second side plane, so that the first side plane is parallel to the second side plane, and repeat the above operation until all optical fiber ribbon components are arranged;

[0041] Step 3: Pass the row-shaped component formed in the second step through the inner hole of the elastic plastic sleeve, so that the wall of the elastic plastic sleeve tightly covers the outside of the row-shaped component. After the covering is completed, the plastic sleeve becomes the outer sheath. When the number of optical fibers needs to be reduced, the optical fiber ribbon component to be reduced is removed from one end of the row-shaped component. The elastic plastic sleeve shrinks and still tightly covers the outside of the row-shaped component to form a new outer sheath, completing the assembly of the optical fiber ribbon cable;

[0042] Wherein, D is a positive integer. When D ≥ 2 and is an even number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both parallelograms; when D ≥ 2 and is an odd number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both isosceles trapezoids.

[0043] The elastic plastic sleeve described above can be made of a rubber band-like material, for example. When the cross-section of the row-like components is large and the original inner diameter of the elastic plastic sleeve is small, it can be tightly wrapped around the outside of the row-like components, and finally form a cross-sectional shape similar to the outer edge of the row-like components; when some optical fiber ribbon components are removed, the inner diameter of the elastic plastic sleeve is still much smaller than the cross-section of the row-like components. At this time, the elastic plastic sleeve can still be tightly wrapped around the outside of the row-like components, and finally form a cross-sectional shape similar to the outer edge of the row-like components; that is, the outer edge shape of the outer sheath can be changed, and it changes with the number of optical fiber ribbon components, but the cross-section is always a parallelogram or an isosceles trapezoid. The material of the elastic plastic sleeve is polyurethane, etc.

[0044] The optical fiber ribbon cable described in the present application is characterized in that the material of the central reinforcement member 1 is steel wire or glass fiber reinforced plastic rod.

[0045] The optical fiber ribbon cable described in the present application is characterized in that the material of the protective layer 3 is polyester yarn or water-blocking yarn or non-woven fabric or water-blocking tape or aluminum tape or steel tape or copper tape or glass fiber reinforced plastic tape or polyester tape.

[0046] The optical fiber ribbon cable described in the present application is characterized in that the material of the outer sheath 4 is plastic.

[0047] The optical fiber ribbon cable described in the present application is characterized in that the optical fiber 26 is a single-mode optical fiber or a multi-mode optical fiber.

[0048] The optical fiber ribbon cable described in the present application is characterized in that the type of the optical fiber 26 is G.652, G.653, G.654, G.655, G.656 or G.657.

[0049] The optical fiber ribbon cable described in the present application is characterized in that the material of the adhesive layer 25 is plastic.

[0050] The optical fiber ribbon components of the present application have a unique shape and structure. For example, in Example 1, the outer edge 211 of the outer wall and the outer edge 231 of the inner wall are both part of a cylindrical surface. The outer edge 231 of the inner wall can be tightly fitted with the outer edge of the central reinforcement member and can be tightly attached to the protective layer. Compared to the layer-twisted structure optical cables in the prior art, the outer edge 211 of the outer wall and the outer edge 231 of the inner wall both achieve surface contact. In the prior art, the outer edge 211 of the outer wall is in tangential contact with the protective layer, and the outer edge 231 of the inner wall is also in tangential contact with the reinforcement member. This increases the contact surface and improves the ability to resist lateral pressure and impact. In Example 2, the outer edge 211 of the outer wall is flat. Compared to the prior art, it is double-tangential to the protective layer, and the contact area is doubled. Therefore, the outer edge of the outer wall has double the pressure and impact resistance. In embodiment 3, the outer edge 231 of the inner wall is a plane, but the outer edge 211 of the outer wall is tangent to the protective layer in two lines, and the contact area is doubled, so the compression and impact resistance of the outer edge of the outer wall is doubled.

[0051] In the present application, the structure of embodiment 3 can be used not only in the circular optical cable of embodiment 1, but also in embodiments 4-7. However, the circular sleeves in the prior art have a large gap between the sleeves when spliced, so the space utilization rate is not high and the fiber core density is not high. Moreover, the optical fiber ribbon component with a trapezoidal cross-section in the present application can be used not only in optical cables with a cylindrical cross-section, but also in optical cables with parallelogram and trapezoidal cross-sections. It can be suitable for pipes and spaces of different shapes, and the number of cores of the optical fiber ribbon can be flexibly changed. Compared with the layer-twisted optical cable in the prior art, this cannot be achieved. After removal, the structure cannot be stable, and the performance of the optical cable cannot be reliable and stable.

[0052] The method for producing or assembling the optical cable in the present application is simple and easy to master, and the optical fiber ribbon components are extremely easy to replace. Industrial Applicability

[0053] The present invention has been implemented and has industrial applicability. The present invention has the following major beneficial technical effects: simple structure, easy manufacture and assembly, variable number of cores in the optical cable, optical fiber ribbon components that can be used in optical cables of different structures, and higher optical fiber core density.

Claims

1. An optical fiber ribbon cable, characterized in that: The optical fiber ribbon cable is assembled by a method comprising the following steps: The first step is to take n optical fiber ribbon components (2); the cross section of the outer edge of the optical fiber ribbon component (2) is an isosceles trapezoid; the optical fiber ribbon component is composed of an outer wall body (21), a first side wall body (22), an inner wall body (23), a second side wall body (24), and an optical fiber ribbon; the outer wall body (21), the first side wall body (22), the inner wall body (23), and the second side wall body (24) form a closed structure; the outer wall body (21) is located outside, the inner wall body (23) is located inside, the first side wall body (22) and the second side wall body (24) are located on both sides; the optical fiber ribbon component has a cavity inside; the outer surface of the outer wall body (21) is the outer edge (211) of the outer wall body, the outer surface of the outer wall body (21) is a plane, the outer surface of the inner wall body (23) is the outer edge (231) of the inner wall body, the outer surface of the inner wall body (23) is a plane, the first side wall body The outer surface of (22) is the outer edge (221) of the first side wall body, the outer surface of the first side wall body (22) is a plane, the outer surface of the second side wall body (24) is the outer edge (241) of the second side wall body, the outer surface of the second side wall body (24) is a plane, the length of the outer edge (211) of the outer wall body is greater than the length of the outer edge (231) of the inner wall body, the angle formed by the outer edge (221) of the first side wall body and the outer edge (241) of the second side wall body extending and intersecting is the central angle, the optical fiber ribbon is composed of a plurality of optical fibers (26) and an adhesive layer (25) covering all the optical fibers, the optical fiber ribbon is located in the cavity, and the central angle is equal to 360 / n degrees; the first side wall body (22) and the second side wall body (24) are collectively referred to as the side wall body, and the outer edge (221) of the first side wall body and the outer edge (241) of the second side wall body are collectively referred to as the outer edge of the side wall body; Step 2: Arrange all the optical fiber ribbon components in a row to form a row-shaped component, align the outer edges of the side walls of adjacent optical fiber ribbon components, and make the first side of the adjacent optical fiber ribbon components the outer edge of the inner wall of one optical fiber ribbon component and the outer edge of the outer wall of another optical fiber ribbon component, so that the first side is on the first side plane, and then make the second side of the adjacent optical fiber ribbon components the outer edge of the outer wall of one optical fiber ribbon component and the outer edge of the inner wall of another optical fiber ribbon component, so that the second side is on the second side plane, and the first side plane is parallel to the second side plane, and repeat the arrangement of the optical fiber ribbon components to complete the arrangement of all the optical fiber ribbon components; Step 3: Pass the row-shaped components formed in the second step through the inner hole of the elastic plastic sleeve, so that the wall of the elastic plastic sleeve is tightly wrapped around the row-shaped components. After the wrapping is completed, the plastic sleeve becomes an outer sheath. When the number of optical fibers needs to be reduced, the optical fiber ribbon component to be reduced is removed from one end of the row-shaped components. The elastic plastic sleeve shrinks and still tightly wraps around the row-shaped components to form a new outer sheath, completing the assembly of the optical fiber ribbon cable. Wherein, n is a positive integer, when n≥2 and is an even number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both parallelograms; when n≥2 and is an odd number, the cross-sections of the outer edges of the row-shaped components and the outer edges of the outer sheath are both isosceles trapezoids; The material of the outer sheath is plastic; the model of the optical fiber (26) is G.652 or G.653 or G.654 or G.655 or G.656 or G.

657.

2. The optical fiber ribbon cable according to claim 1, characterized in that: The material of the adhesive layer (25) is plastic.

3. An optical fiber ribbon cable, comprising n identical optical fiber ribbon components (2) and an outer sheath, characterized in that: The cross section of the outer edge of the optical fiber ribbon component (2) is an isosceles trapezoid. The optical fiber ribbon component is composed of an outer wall body (21), a first side wall body (22), an inner wall body (23), a second side wall body (24), and an optical fiber ribbon. The outer wall body (21), the first side wall body (22), the inner wall body (23), and the second side wall body (24) form a closed structure. The outer wall body (21) is located outside, the inner wall body (23) is located inside, and the first side wall body (22) and the second side wall body (24) are located inside. The optical fiber ribbon component has a cavity inside on both sides, the outer surface of the outer wall body (21) is the outer edge (211) of the outer wall body, the outer surface of the outer wall body (21) is a plane, the outer surface of the inner wall body (23) is the outer edge (231) of the inner wall body, the outer surface of the inner wall body (23) is a plane, the outer surface of the first side wall body (22) is the outer edge (221) of the first side wall body, the outer surface of the first side wall body (22) is a plane, and the outer surface of the second side wall body (24) is the outer edge (221) of the second side wall body The outer edge (241) of the first side wall body is a plane, the outer edge (211) of the first side wall body is longer than the outer edge (231) of the second side wall body, the angle formed by the outer edge (221) of the first side wall body and the outer edge (241) of the second side wall body extending and intersecting is the central angle, the optical fiber ribbon is composed of a plurality of optical fibers (26) and an adhesive layer (25) covering all the optical fibers, the optical fiber ribbon is located in the cavity, and the central angle is equal to 360 / n degrees; the first side wall body (2 2) The second side wall body (24) is collectively referred to as the side wall body, the outer edge (221) of the first side wall body and the outer edge (241) of the second side wall body are collectively referred to as the outer edge of the side wall body; all optical fiber ribbon components are arranged in a row to form a row-shaped component, and the outer edges of the side wall bodies at the joints of adjacent optical fiber ribbon components are aligned. In the row-shaped component, in adjacent optical fiber ribbon components: the first side is the outer edge (231) of the inner wall body of one optical fiber ribbon component, the outer edge (211) of the outer wall body of another optical fiber ribbon component, The second side is the outer edge (211) of the outer wall of one optical fiber ribbon component and the outer edge (231) of the inner wall of another optical fiber ribbon component. The outer edges on both sides of the row-shaped component are planes, and the outer sheath is wrapped around the outside of the row-shaped component. Wherein, n is a positive integer not less than 2. When n≥2 and is a positive even number, the cross-section of the outer edge of the row-shaped component and the cross-section of the outer edge of the outer sheath are both parallelograms. When n≥2 and is a positive odd number, the cross-section of the outer edge of the row-shaped component and the cross-section of the outer edge of the outer sheath are both isosceles trapezoids.

4. The optical fiber ribbon cable according to claim 3, characterized in that: It has at least two identical row-shaped components, all of which are assembled to form a parallelogram-shaped row-shaped composite component, an outer sheath is wrapped around the row-shaped composite component, and the cross-section of the outer edge of the outer sheath is a parallelogram.

5. The optical fiber ribbon cable according to claim 3, characterized in that: The material of the outer sheath is plastic.

6. The optical fiber ribbon cable according to claim 3, characterized in that: The optical fiber (26) is a single-mode optical fiber or a multi-mode optical fiber.

7. The optical fiber ribbon cable according to claim 3, characterized in that: The material of the adhesive layer (25) is plastic.

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