Ribbon optical cable with bent optical fiber ribbon

Abstract

The invention belongs to the technical field of optical cables, and discloses a ribbon optical cable with a bent optical fiber ribbon, which comprises an optical fiber ribbon, a butterfly-shaped introduction unit, a power transmission unit and a protection component, and is characterized in that the protection component is composed of an outer bushing with a ring cylinder-shaped cross section, a first inner bushing and a second inner bushing, the first neck bush and the second neck bush are both located in the outer bush and combined with the inner wall of the outer bush, the first neck bush is concave upwards, the second neck bush is concave downwards, the first neck bush and the second neck bush intersect to form a center cavity, and a first bent cavity, a second bent cavity, a first side cavity and a second side cavity are formed between the first neck bush and the outer bush; the optical fiber ribbon is distributed in the bending cavity in a bending mode, the butterfly-shaped leading-in unit is located in the center cavity, and the power transmission unit is located in the side cavity. The optical cable has the advantages of being simpler in structure, easier to manufacture, higher in fiber core density and space utilization rate, lower in cost, multipurpose and more convenient to lay and maintain.

Description

Technical Field

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

[0002] As the demand for broadband continues to grow, the demand for optical cables that combine optical fiber ribbons with butterfly-shaped lead-in units is also growing. To this end, the industry has made unremitting research and development, and the main results are as follows.

[0003] CN117270129A discloses a core-intensive optical fiber ribbon cable, comprising M identical optical fiber ribbons, a protective layer, and an outer sheath. The optical fiber ribbon is an integrated structure, and is composed of N curved segments connected in sequence, and there is a curved cavity between adjacent curved segments; all optical fiber ribbons are assembled to form a complete cable core, and the outer surface of the cable core is cylindrical; the protective layer is coated on the outside of the cable core, and the outer sheath is coated on the outside of the protective layer; wherein M≥3, N≥3, M and N are both positive integers. The present invention has the following main beneficial technical effects: easier to manufacture and keep, more reasonable structure, more compact, smaller size, less material consumption, lower comprehensive cost, and greater pressure resistance.

[0004] CN118759659A discloses a flame-retardant optical fiber ribbon cable, which includes a loose tube. The loose tube is composed of a tube body and at least two optical fiber ribbons with different core numbers. The tube body is an integrated structure. The tube body is composed of an outer wall body and at least one inner wall body. The inner wall cross-section of the outer wall body is circular. The inner wall body divides the interior of the outer wall body into a plurality of non-communicating accommodating cavities, and at least one curved accommodating cavity is provided. The curved accommodating cavity is used to place an optical fiber ribbon with a large core number. The optical fiber ribbon with a large core number is distributed in a curved manner in the curved accommodating cavity.

[0005] CN116665981A discloses a butterfly-shaped optical cable with a curved optical fiber ribbon, which has multiple optical fiber ribbons, four power transmission components, a butterfly-shaped introduction unit, and a protective layer; the characteristics are: it also has a shell component, the cross section of the shell component is square, the shell component is composed of four identical first shells and a central body; the power transmission component is located in the first shell, the optical fiber ribbon is in a curved shape, the optical fiber ribbon is located in a curved cavity formed by adjacent first shells, and the butterfly-shaped introduction unit is located in the central cavity of the central body; the protective layer is coated on the outside of the shell component. The present invention also discloses a ribbon optical cable and a power cable with a curved optical fiber ribbon.

[0006] The above-mentioned prior arts all adopt a structure in which a butterfly-shaped introduction unit and an optical fiber ribbon are combined. However, the structural complexity thereof needs to be further improved to make production more convenient, cost-effective and space-efficient. Summary of the invention

[0007] To solve the above problems, the object of the present invention is to disclose a ribbon optical cable having a curved optical fiber ribbon, which is achieved by adopting the following technical solutions.

[0008] A ribbon optical cable with a curved optical fiber ribbon, comprising an optical fiber ribbon, a butterfly introduction unit, a power transmission unit, and a protective component, characterized in that the protective component is composed of an outer sleeve with a cross section in the shape of a ring cylinder, a first inner sleeve and a second inner sleeve with a cross section that is a part of the ring cylinder, the first inner sleeve and the second inner sleeve are both located inside the outer sleeve, both ends of the first inner sleeve and the second inner sleeve are combined with the inner wall of the outer sleeve, the first inner sleeve is concave upward, and the second inner sleeve is concave downward, the first inner sleeve and the second inner sleeve intersect to form a central cavity located in the center, a second curved cavity is formed between the lower part of the first inner sleeve and the lower side of the outer sleeve, a first curved cavity is formed between the upper part of the second inner sleeve and the upper side of the outer sleeve, the first inner sleeve and the second inner sleeve intersect and form a first side cavity with the left side of the outer sleeve, the first inner sleeve and the second inner sleeve intersect and form a second side cavity with the right side of the outer sleeve, the optical fiber ribbon is distributed in the first curved cavity and the second curved cavity in a curved manner, the butterfly introduction unit is located in the central cavity, The power transmission unit is located in the first side cavity and the second side cavity.

[0009] A ribbon optical cable with a curved optical fiber ribbon, comprising an optical fiber ribbon, a butterfly-shaped introduction unit, a power transmission unit, and a protective component; the optical fiber ribbon is composed of a plurality of optical fibers and an adhesive layer, and the adhesive layer covers all the optical fibers; the butterfly-shaped introduction unit is composed of an optical fiber, two reinforcement members, and a butterfly-shaped sheath, the optical fiber is located in the center of the butterfly-shaped sheath, and the two reinforcement members are respectively located in the butterfly-shaped sheath on the left and right sides of the optical fiber; the power transmission unit is composed of an electric conductor and an insulating layer, and the insulating layer covers the electric conductor; the characteristic is that the protective component is composed of an outer sleeve, The first splicing bar, the second splicing bar, the first support bar, the second support bar, the third support bar and the fourth support bar are all located inside the outer bushing, one end of the first support bar is connected to the inner wall of the upper left of the upper half of the outer bushing, one end of the second support bar is connected to the inner wall of the lower left of the lower half of the outer bushing, the other end of the first support bar, the other end of the second support bar, one end of the first splicing bar, the second support bar One end of the splicing strip is connected together, one end of the third support strip is connected to the inner wall of the upper right part of the upper half of the outer sleeve, one end of the fourth support strip is connected to the inner wall of the upper right part of the lower half of the outer sleeve, the other end of the third support strip, the other end of the fourth support strip, the other end of the first splicing strip, and the other end of the second splicing strip are connected together, and the closed space surrounded by the left side of the outer sleeve, the first support strip, and the second support strip is the first side cavity, and the closed space surrounded by the right side of the outer sleeve, the third support strip, and the fourth support strip is the The space is the second side cavity, the closed space surrounded by the first splicing strip and the second splicing strip is the central cavity, the closed space surrounded by the upper side of the outer sleeve, the first support strip, the third support strip, and the second splicing strip is the first curved cavity, and the closed space surrounded by the lower side of the outer sleeve, the second support strip, the fourth support strip, and the first splicing strip is the second curved cavity. The protective component is an integrated structure; the optical fiber ribbon is located in the first curved cavity and the second curved cavity, the butterfly introduction unit is located in the central cavity, and the power transmission unit is located in the first side cavity and the second side cavity.

[0010] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized by: it also has a protective layer and an outer sheath, the protective layer is coated on the outside of the protective component, and the outer sheath is coated on the outside of the protective layer.

[0011] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the protective component has a vertically symmetrical and a left-right symmetrical structure.

[0012] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the outer sleeve is symmetrical in left and right directions and in top and bottom directions.

[0013] The present application has the following major beneficial technical effects: simpler structure, easier manufacturing, higher fiber core density, higher space utilization, lower cost, one cable for multiple uses, and easier laying and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure after dissection of Example 1.

[0015] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-section structure.

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of implementation example 2.

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of a section of the protective component used in Implementation Example 1 and Implementation Example 2 after dissection.

[0018] Figure 5 for Figure 4 Schematic diagram of the enlarged cross-section structure. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0020] In the figure: 1-optical fiber ribbon, 2-butterfly introduction unit, 3-power transmission unit, 4-protective component, 5-protective layer, 6-outer sheath, 11-optical fiber, 12-adhesive layer, 21-optical fiber, 22-reinforcement member, 23-butterfly sheath, 31-electric conductor, 32-insulating layer, 41-outer sleeve, 401-first bending cavity, 410-second bending cavity, 420-central cavity, 421-first splicing strip, 422-second splicing strip, 430-first side cavity, 431-first support strip, 432-second support strip, 440-second side cavity, 441-third support strip, 442-fourth support strip.

[0021] Implementation Example 1: Please see Figure 1 , 2 and Figure 4 and Figure 5A ribbon optical cable with a curved optical fiber ribbon comprises an optical fiber ribbon 1, a butterfly-shaped introduction unit 2, a power transmission unit 3, a protective component 4, a protective layer 5, and an outer sheath 6, wherein the protective layer 5 is coated on the outside of the protective component 4, and the outer sheath 6 is coated on the outside of the protective layer 5; the optical fiber ribbon 1 is composed of a plurality of optical fibers 11 and an adhesive layer 12, and the adhesive layer 12 covers all the optical fibers 11; the butterfly-shaped introduction unit 2 is composed of an optical fiber 21, two reinforcement members 22, and a butterfly-shaped sheath 23, wherein the optical fiber 21 is located in the center of the butterfly-shaped sheath 23, and the two reinforcement members 22 are respectively located in the butterfly-shaped sheath 23 on the left and right sides of the optical fiber 21; the power transmission unit 3 is composed of an electric conductor 31 and an insulating layer 32, and the insulating layer 32 covers the electric conductor 31 ; It is characterized in that: the protection component 4 is composed of an outer sleeve 41, a first splicing bar 421, a second splicing bar 422, a first support bar 431, a second support bar 432, a third support bar 441, and a fourth support bar 442. The first splicing bar 421, the second splicing bar 422, the first support bar 431, the second support bar 432, the third support bar 441, and the fourth support bar 442 are all located inside the outer sleeve 41, one end of the first support bar 431 is connected to the inner wall of the upper left of the upper half of the outer sleeve 41, one end of the second support bar 432 is connected to the inner wall of the lower left of the lower half of the outer sleeve 41, and the other end of the first support bar 431 and the other end of the second support bar 432 are connected to the inner wall of the lower left of the lower half of the outer sleeve 41. One end, one end of the first splicing strip 421, and one end of the second splicing strip 422 are connected together, one end of the third support strip 441 is connected to the inner wall of the upper right part of the upper half of the outer sleeve 41, and one end of the fourth support strip 442 is connected to the inner wall of the upper right part of the lower half of the outer sleeve 41. The other end of the third support strip 441, the other end of the fourth support strip 442, the other end of the first splicing strip 421, and the other end of the second splicing strip 422 are connected together. The closed space surrounded by the left side of the outer sleeve 41, the first support strip 431, and the second support strip 432 is the first side cavity 430, and the right side of the outer sleeve 41, the third support strip 441, and the fourth support strip 442 are the closed space surrounded by the third side cavity 430. The closed space is the second side cavity 440, the closed space surrounded by the first splicing strip 421 and the second splicing strip 422 is the central cavity 420, the closed space surrounded by the upper side of the outer sleeve 41, the first support strip 431, the third support strip 441, and the second splicing strip 422 is the first bending cavity 401, and the closed space surrounded by the lower side of the outer sleeve 41, the second support strip 432, the fourth support strip 442, and the first splicing strip 421 is the second bending cavity 410, and the protective component 4 is an integrated structure; the optical fiber ribbon 1 is located in the first bending cavity 401 and the second bending cavity 410, the butterfly introduction unit 2 is located in the central cavity 420, and the power transmission unit 3 is located in the first side cavity 430 and the second side cavity 440.

[0022] refer to Figure 5The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the cross-sections of the inner wall and the outer wall of the outer sleeve 41 are both circular, and the centers of the inner wall and the outer wall of the outer sleeve 41 coincide with each other.

[0023] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 close to the central cavity 420 are collectively referred to as inner walls, and on the contrary, the walls away from the central cavity 420 are collectively referred to as outer walls, the inner walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 are on a first circumference, and the outer walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 are on a second circumference, and the centers of the first circle and the second circle coincide.

[0024] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 close to the central cavity 420 are collectively referred to as inner walls, and on the contrary, the walls away from the central cavity 420 are collectively referred to as outer walls, the inner walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 are on the third circumference, the outer walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 are on the fourth circumference, and the centers of the third circle and the fourth circle coincide.

[0025] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the diameters of the second circumference, the fourth circumference, and the inner wall of the outer bushing 41 are equal.

[0026] As another embodiment, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that: the cross-sections of the inner wall and the outer wall of the outer sleeve 41 are both elliptical, and the centers of the inner wall and the outer wall of the outer sleeve 41 are coincident, the planes where the long axes of the inner wall and the outer wall of the outer sleeve 41 are coincident, the planes where the short axes of the inner wall and the outer wall of the outer sleeve 41 are coincident, and the inner wall and the outer wall of the outer sleeve 41 are geometrically similar shapes. The so-called geometric similarity means that the ratio of the long axes is equal to the corresponding ratio of the short axes.

[0027] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that: the walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 close to the central cavity 420 are collectively referred to as inner walls, and on the contrary, the walls far away from the central cavity 420 are collectively referred to as outer walls, the inner walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 are on the circumference of the first ellipse, and the outer walls of the first support bar 431, the first splicing bar 421, and the third support bar 441 are on the second ellipse, the centers of the first ellipse and the second ellipse coincide, the major axes of the first ellipse and the second ellipse coincide, the minor axes of the first ellipse and the second ellipse coincide, and the first ellipse and the second ellipse are geometrically similar shapes.

[0028] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that: the walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 close to the central cavity 420 are collectively referred to as inner walls, and on the contrary, the walls far away from the central cavity 420 are collectively referred to as outer walls, the inner walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 are on the third ellipse, the outer walls of the second support bar 432, the second splicing bar 422, and the fourth support bar 442 are on the fourth ellipse, the centers of the third ellipse and the fourth ellipse coincide, the major axes of the third ellipse and the fourth ellipse coincide, the minor axes of the third ellipse and the fourth ellipse coincide, and the third ellipse and the fourth ellipse are geometrically similar shapes.

[0029] Furthermore, the above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the long axes of the second ellipse, the fourth ellipse, and the inner wall of the outer sleeve 41 are equal, and the short axes of the first ellipse, the third ellipse, and the inner wall of the outer sleeve 41 are equal.

[0030] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the outer sleeve 41 is symmetrical in left and right directions and in top and bottom directions.

[0031] In this embodiment, the optical fiber ribbon 1 adopts an optical fiber ribbon with a rectangular cross-section in the prior art. When placed in the first bending cavity 401 and the second bending cavity 410, since the first bending cavity 401 and the second bending cavity 410 are curved, the optical fiber ribbon is also curved in the first bending cavity 401 and the second bending cavity 410. The so-called arc bending refers to circular arc bending or elliptical arc bending, and this bending will not affect any performance of the optical fiber ribbon; when there are multiple optical fiber ribbons in the first bending cavity 401 and the second bending cavity 410, they are distributed in a stacked manner, and all optical fiber ribbons are curved. Compared with a straight cavity, due to the bending, the actual length of the optical fiber ribbon that can be accommodated is longer, that is, if the length of the left and right sides of the curved cavity is the same as the length of the straight cavity, due to the bending, the actual length is longer, so the optical fiber ribbon that can be placed is longer, the number of optical fibers in the optical fiber ribbon is more, and the fiber core density is higher.

[0032] In this embodiment, the cross section of the central cavity 420 is actually olive-shaped, and the butterfly-shaped introduction unit 2 is located in the central cavity 420, which can be tightly fitted or loosely fitted, that is, the outer surface of the butterfly-shaped sheath 23 can actually be an olive shape that matches the shape of the central cavity 420, and the butterfly-shaped introduction unit 2 is preferably a structure that is symmetrical in both top and bottom and left and right. Figure 2 and Figure 5 In the embodiment, the major axis of the butterfly-shaped introduction unit is the left-right direction, and the vertically symmetrical plane of the central cavity 420 coincides with the vertically symmetrical plane of the butterfly-shaped introduction unit. Of course, in order to reasonably save materials, the upper and lower parts of the butterfly-shaped sheath 23 are partially recessed.

[0033] In this embodiment, the outer edge of the insulating layer 32 of the power transmission unit 3 is composed of three arcs, the shape of the insulating layer 32 matches the shapes of the first side cavity 430 and the second side cavity 440, and the electrical conductor 31 of the power transmission unit 3 is formed by stretching during wire connection or casting.

[0034] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the material of the protective component 4 is plastic or a material containing metal components.

[0035] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the material of the protective layer 5 is a steel ribbon or an aluminum ribbon or a water-blocking ribbon or a polyester ribbon or a glass fiber reinforced plastic ribbon or an aramid yarn or a glass fiber yarn, and the protective layer 5 is spirally or longitudinally wrapped on the protective component 4, and has overlaps when spirally or longitudinally wrapped.

[0036] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the material of the outer sheath 6 is plastic.

[0037] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the type of the optical fiber 11 is single-mode or multi-mode, and the core of the optical fiber can be glass, plastic, or hollow optical fiber.

[0038] The above-mentioned ribbon optical cable with curved optical fiber ribbon is characterized in that the material of the adhesive layer 12 is plastic, preferably polypropylene or polyacrylic resin.

[0039] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the type of the optical fiber 21 is single-mode or multi-mode, preferably a bend-insensitive optical fiber, such as model G.657.

[0040] The above-mentioned ribbon optical cable with curved optical fiber ribbon is characterized in that the material of the reinforcement member 22 is steel wire, aluminum wire, copper wire, glass fiber reinforced plastic or aramid yarn.

[0041] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the material of the butterfly sheath 23 is plastic, preferably low-smoke low-halogen polyethylene, low-smoke halogen-free polyethylene, medium-density polyethylene, high-density polyethylene, polyvinyl chloride, polytetrafluoroethylene, nylon, polyurethane, TPE, and TPU.

[0042] The above-mentioned ribbon optical cable with a curved optical fiber ribbon is characterized in that the material of the electrical conductor 31 is copper or aluminum or a copper alloy or an aluminum alloy.

[0043] The above-mentioned ribbon optical cable with curved optical fiber ribbon is characterized in that the material of the insulating layer 32 is plastic, preferably low-smoke low-halogen polyethylene, low-smoke halogen-free polyethylene, medium-density polyethylene, high-density polyethylene, polyvinyl chloride, TPE, and TPU.

[0044] Implementation Example 2: Please see Figure 3 , and refer to Figure 1 and Figure 2 and Figure 4 , 5 A ribbon optical cable having a curved optical fiber ribbon is basically the same as embodiment 1, except that it does not have a protective layer 5 and an outer sheath 6.

[0045] A ribbon optical cable with a curved optical fiber ribbon in the present application is produced by: extruding a protective component 4 through a sheath extruder, and while extruding, taking the optical fiber ribbon 1 and passing it through the upper and lower curved cavities of the mold installed in the extruder head, and making the optical fiber ribbon 1 form an arc-shaped curved state therein; taking the butterfly-shaped introduction unit 2 and passing it through the central cavity of the mold installed in the extruder head; taking the power transmission unit 3 and passing it through the side cavity of the mold installed in the extruder head; stretching and pulling the protective component 4 and the optical fiber ribbon 1, the butterfly-shaped introduction unit 2, and the power transmission unit 3 through the extruder head into a cooling water tank at the same time, and pulling them in the cooling water tank for a period of time to make the protective component 4 quickly take shape, pulling it out of the water tank and drying the surface with wind to form a ribbon optical cable with a curved optical fiber ribbon.

[0046] The ribbon optical cable with a curved optical fiber ribbon described in the present application comprises an optical fiber ribbon, a butterfly introduction unit, a power transmission unit, and a protective component, characterized in that the protective component is composed of an outer sleeve with a cross-section in the shape of a ring cylinder, a first inner sleeve and a second inner sleeve with a cross-section that is a part of the ring cylinder, the first inner sleeve and the second inner sleeve are both located inside the outer sleeve, both ends of the first inner sleeve and the second inner sleeve are combined with the inner wall of the outer sleeve, the first inner sleeve is concave upward, and the second inner sleeve is concave downward, the first inner sleeve and the second inner sleeve intersect to form a central cavity located in the center, a second curved cavity is formed between the lower part of the first inner sleeve and the lower side of the outer sleeve, a first curved cavity is formed between the upper part of the second inner sleeve and the upper side of the outer sleeve, the first inner sleeve and the second inner sleeve intersect and form a first side cavity with the left side of the outer sleeve, the first inner sleeve and the second inner sleeve intersect and form a second side cavity with the right side of the outer sleeve, the optical fiber ribbon is distributed in the first curved cavity and the second curved cavity in a curved manner, the butterfly introduction unit is located in the central cavity, The power transmission unit is located in the first side cavity and the second side cavity.

[0047] The above-mentioned ribbon optical cable with a curved optical fiber ribbon further comprises a protective layer and an outer sheath, wherein the protective layer is coated on the outside of the protective component, and the outer sheath is coated on the outside of the protective layer.

[0048] In the above-mentioned ribbon optical cable with a curved optical fiber ribbon, the protective component has a structure that is symmetrical in both vertical and horizontal directions.

[0049] In the above-mentioned ribbon optical cable with a curved optical fiber ribbon, the first inner sleeve corresponds to the connection structure of the first support bar 431, the first splicing bar 421, and the third support bar 441; and the second inner sleeve corresponds to the connection structure of the second support bar 432, the second splicing bar 422, and the fourth support bar 442.

[0050] In the above-mentioned ribbon optical cable with a curved optical fiber ribbon, the first inner sleeve is equivalent to translating the outer sleeve from bottom to top, and the outer sleeve that translates upward is called translation piece one here, and the contact point between the translation piece one and the inner wall of the outer sleeve is located above the upper and lower symmetry plane of the outer sleeve; similarly, the second inner sleeve is equivalent to translating the outer sleeve from top to bottom, and the outer sleeve that translates downward is called translation piece two here, and the contact point between the translation piece two and the inner wall of the outer sleeve is located below the upper and lower symmetry plane of the outer sleeve; and the translation piece one and the translation piece two are symmetrical about the upper and lower symmetry plane of the outer sleeve.

[0051] Since the optical fiber ribbon 1, the butterfly-shaped introduction unit 2, and the power transmission unit 3 are all pre-produced or available for purchase, the actual production of the present application is very simple. When there is no protective layer 5 and the outer sheath 6, they can be formed in one step on the sheath extruder, which saves working steps and improves the production speed; when there is a protective layer 5 and the outer sheath 6, it only needs to be produced on the sheath extruder, that is, the protective component 4 with the optical fiber ribbon 1, the butterfly-shaped introduction unit 2, and the power transmission unit 3 inside is passed through the center hole of the mold of the head of the sheath extruder, and before passing, the protective layer 5 is spirally or longitudinally coated on the outside, the coated protective layer 5 is pulled together with the protective component 4, and the outer sheath 6 is extruded outside, so the production is quite convenient and fast.

[0052] In the present application, the internal space of the protective component 4 is fully utilized, so that the number of optical fibers in the optical fiber ribbon is larger, the fiber core density is higher, the space utilization rate is higher, and the cost is lower; at the same time, it has the ability of butterfly access and the ability of strong power transmission, which is especially suitable for computer rooms and large junction boxes arranged in communities. There is no need to apply for electricity separately, and one-time access is sufficient, saving various costs.

[0053] In the present application, through a simple structure, the optical fiber ribbon is distributed in the curved cavity in a curved form, thereby increasing the length of the optical fiber ribbon and the number of optical fiber cores in the optical fiber ribbon. Through the isolation of the central cavity 420, etc., the transmission units 3 in the first side cavity 430 and the second side cavity 440 are isolated and can transmit two-phase power, thereby achieving better insulation and heat dissipation performance; the butterfly-shaped introduction unit 2 in the central cavity 420 does not need to be additionally fixed, and effectively and efficiently utilizes the space of the central cavity 420.

[0054] Of course, as a special improvement, the first inner sleeve and the second inner sleeve can be an arc different from that of the outer sleeve. For example, the outer sleeve is a circle, and the first inner sleeve and the second inner sleeve are part of an ellipse. The purpose of bending the cavity, bending the optical fiber ribbon, and increasing the core density can also be achieved.

[0055] Therefore, the present application has the following major beneficial technical effects: simpler structure, easier manufacturing, higher fiber core density, higher space utilization, lower cost, one cable for multiple uses, and easier laying and maintenance.

[0056] 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 ribbon optical cable with a curved optical fiber ribbon, comprising an optical fiber ribbon, a butterfly-shaped introduction unit, a power transmission unit, and a protective component, characterized in that: The protective component is composed of an outer sleeve with a cross-section in the shape of an annular cylinder, a first inner sleeve and a second inner sleeve which are a part of the annular cylinder in cross-section. The first inner sleeve and the second inner sleeve are both located inside the outer sleeve. Both ends of the first inner sleeve and the second inner sleeve are combined with the inner wall of the outer sleeve. The first inner sleeve is concave upward, and the second inner sleeve is concave downward. The first inner sleeve and the second inner sleeve intersect to form a central cavity located in the center. A second curved cavity is formed between the bottom of the first inner sleeve and the lower side of the outer sleeve. A first curved cavity is formed between the top of the second inner sleeve and the upper side of the outer sleeve. The first inner sleeve and the second inner sleeve intersect and form a first side cavity with the left side of the outer sleeve. The first inner sleeve and the second inner sleeve intersect and form a second side cavity with the right side of the outer sleeve. The optical fiber ribbons are distributed in the first curved cavity and the second curved cavity in a curved manner. The butterfly introduction unit is located in the central cavity. The power transmission unit is located in the first side cavity and the second side cavity.

2. A ribbon optical cable having a curved optical fiber ribbon, comprising an optical fiber ribbon (1), a butterfly-shaped introduction unit (2), a power transmission unit (3), and a protective component (4); the optical fiber ribbon (1) is composed of a plurality of optical fibers (11) and an adhesive layer (12), wherein the adhesive layer (12) covers all the optical fibers (11); the butterfly-shaped introduction unit (2) is composed of an optical fiber (21), two reinforcement members (22), and a butterfly-shaped sheath (23), wherein the optical fiber (21) is located in the center of the butterfly-shaped sheath (23), and the two reinforcement members (22) are respectively located in the butterfly-shaped sheath (23) on the left and right sides of the optical fiber (21); the power transmission unit (3) is composed of an electric conductor (31) and an insulating layer (32), wherein the insulating layer (32) covers the electric conductor (31); the characteristics are as follows: The protective component (4) is composed of an outer sleeve (41), a first splicing bar (421), a second splicing bar (422), a first support bar (431), a second support bar (432), a third support bar (441), and a fourth support bar (442). The first splicing bar (421), the second splicing bar (422), the first support bar (431), the second support bar (432), the third support bar (441), and the fourth support bar (442) are all located inside the outer sleeve (41). One end of the first support bar (431) is connected to the inner wall of the upper left corner of the upper half of the outer sleeve (41). One end of the second support bar (432) is connected to the inner wall at the lower left of the lower half of the outer bushing (41); the other end of the first support bar (431), the other end of the second support bar (432), one end of the first splicing bar (421), and one end of the second splicing bar (422) are connected together; one end of the third support bar (441) is connected to the inner wall at the upper right of the upper half of the outer bushing (41); one end of the fourth support bar (442) is connected to the inner wall at the upper right of the lower half of the outer bushing (41); the other end of the third support bar (441) and the other end of the fourth support bar (442) are connected together; The first end of the outer sleeve (41), the other end of the first splicing strip (421), and the other end of the second splicing strip (422) are connected together; the closed space surrounded by the left side of the outer sleeve (41), the first support strip (431), and the second support strip (432) is the first side cavity (430); the closed space surrounded by the right side of the outer sleeve (41), the third support strip (441), and the fourth support strip (442) is the second side cavity (440); the closed space surrounded by the first splicing strip (421) and the second splicing strip (422) is the central cavity (420); the upper side of the outer sleeve (41), the first support strip (431), and the third support strip (441) are connected together; The closed space surrounded by the three support bars (441) and the second splicing bar (422) is the first bending cavity (401); the closed space surrounded by the lower side of the outer sleeve (41), the second support bar (432), the fourth support bar (442) and the first splicing bar (421) is the second bending cavity (410); the protective component (4) is an integrated structure; the optical fiber ribbon (1) is located in the first bending cavity (401) and the second bending cavity (410); the butterfly-shaped introduction unit (2) is located in the central cavity (420); and the power transmission unit (3) is located in the first side cavity (430) and the second side cavity (440).

3. A ribbon optical cable having a curved optical fiber ribbon according to claim 1 or claim 2, characterized in that: It also comprises a protective layer and an outer sheath, wherein the protective layer is coated on the outside of the protective component, and the outer sheath is coated on the outside of the protective layer.

4. The optical fiber ribbon cable having a curved optical fiber ribbon according to claim 3, characterized in that: The protective component has a vertically symmetrical and a left-right symmetrical structure.

5. The ribbon optical cable having a curved optical fiber ribbon according to claim 4, characterized in that: The outer bushing is symmetrical left-right and top-bottom.

6. The optical fiber ribbon cable having a curved optical fiber ribbon according to claim 2, characterized in that: The inner wall and the outer wall of the outer bushing (41) are both circular in cross section, and the centers of the inner wall and the outer wall of the outer bushing (41) coincide with each other; the walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) close to the central cavity (420) are collectively referred to as the inner wall, and conversely, the walls away from the central cavity (420) are collectively referred to as the outer wall; the inner walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) are on a first circumference, and the outer walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) are on a second circumference, and the first circumference and the second circumference are mutually adjacent. The centers of the circles coincide with each other; the walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) close to the central cavity (420) are collectively referred to as inner walls. On the contrary, the walls far from the central cavity (420) are collectively referred to as outer walls. The inner walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) are on the third circumference, and the outer walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) are on the fourth circumference. The centers of the third circumference and the fourth circumference coincide with each other; the diameters of the second circumference, the fourth circumference, and the inner wall of the outer bushing (41) are equal.

7. The optical fiber ribbon cable having a curved optical fiber ribbon according to claim 2, characterized in that: The cross-sections of the inner wall and the outer wall of the outer bushing (41) are both elliptical, and the centers of the inner wall and the outer wall of the outer bushing (41) are coincident, the planes where the major axes of the inner wall and the outer wall of the outer bushing (41) are coincident, the planes where the minor axes of the inner wall and the outer wall of the outer bushing (41) are coincident, and the inner wall and the outer wall of the outer bushing (41) are geometrically similar shapes; the walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) close to the central cavity (420) are collectively referred to as the inner wall, and conversely, the walls away from the central cavity (420) are collectively referred to as the outer wall, the inner walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) are on the circumference of the first ellipse, the outer walls of the first support bar (431), the first splicing bar (421), and the third support bar (441) are on the second ellipse, and the centers of the first ellipse and the second ellipse are coincident, The major axes of the first ellipse and the second ellipse coincide with each other, the minor axes of the first ellipse and the second ellipse coincide with each other, and the first ellipse and the second ellipse are geometrically similar shapes; the walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) close to the central cavity (420) are collectively referred to as the inner wall, and on the contrary, the walls far from the central cavity (420) are collectively referred to as the outer wall, the inner walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) are on the third ellipse, and the outer walls of the second support bar (432), the second splicing bar (422), and the fourth support bar (442) are on the fourth ellipse, the centers of the third ellipse and the fourth ellipse coincide with each other, the major axes of the third ellipse and the fourth ellipse coincide with each other, the minor axes of the third ellipse and the fourth ellipse coincide with each other, and the third ellipse and the fourth ellipse are geometrically similar shapes; the major axes of the second ellipse, the fourth ellipse, and the inner wall of the outer bushing (41) are equal, The short axes of the first ellipse, the third ellipse and the inner wall of the outer bushing (41) are equal.

8. The ribbon optical cable having a curved optical fiber ribbon according to claim 6 or claim 7, characterized in that: The material of the protective component (4) is plastic or a material containing metal components.

9. The ribbon optical cable having a curved optical fiber ribbon according to claim 8, characterized in that: The material of the protective layer (5) is steel tape or aluminum tape or water-blocking tape or polyester tape or glass fiber reinforced plastic tape or aramid yarn or glass fiber yarn; the material of the outer sheath (6) is plastic; the type of the optical fiber (11) is single mode or multimode; the material of the adhesive layer (12) is plastic; the type of the optical fiber (21) is single mode or multimode; the material of the reinforcement (22) is steel wire or aluminum wire or copper wire or glass fiber reinforced plastic or aramid yarn; the material of the butterfly sheath (23) is plastic; the material of the conductor (31) is copper or aluminum or copper alloy or aluminum alloy; the material of the insulating layer (32) is plastic.

10. The ribbon optical cable having a curved optical fiber ribbon according to claim 9, characterized in that: The production method comprises: extruding a protective component (4) through a sheath extruder, and while extruding, taking an optical fiber ribbon (1) and passing it through the upper and lower curved cavities of a mold installed in an extruder head, and making the optical fiber ribbon (1) form an arc-shaped curved state therein; taking a butterfly-shaped introduction unit (2) and passing it through the central cavity of the mold installed in the extruder head; taking a power transmission unit (3) and passing it through the side cavity of the mold installed in the extruder head; and simultaneously stretching and pulling the protective component (4) and the optical fiber ribbon (1), the butterfly-shaped introduction unit (2) and the power transmission unit (3) through the extruder head into a cooling water tank, and pulling them in the cooling water tank for a period of time to make the protective component (4) quickly take shape, and then pulling them out of the water tank and drying the surface with wind to form a ribbon-shaped optical cable with a curved optical fiber ribbon.

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