WO2021218155A1

WO2021218155A1 - Optical cable with high fiber core density and having higher spatial utilization rate

Info

Publication number: WO2021218155A1
Application number: PCT/CN2020/134147
Authority: WO
Inventors: 阚晓洁
Original assignee: 常熟虞通光电科技有限公司
Priority date: 2020-04-26
Filing date: 2020-12-06
Publication date: 2021-11-04
Also published as: CN111308627A

Abstract

The present invention belongs to the technical fields of electric power and optical cables, and relates to an optical cable with a high fiber core density and having a higher space utilization rate. The optical cable is provided with a reinforcing member (5), special-shaped loose tubes (1), a protective layer (6), and an outer sheath (7), wherein the special-shaped loose tubes (1) have a special shape; in the optical cable, a second flat face of the previous special-shaped loose tube (1) is tightly attached to a first flat face of the next special-shaped loose tube (1), and a second flat face of the last special-shaped loose tube (1) is tightly attached to a first flat face of the first special-shaped loose tube (1); the outer side faces (13) of all the special-shaped loose tubes (1) are on a second cylinder surface and fit together to form a complete cylinder, and the inner side faces (12) of all the special-shaped loose tubes (1) are on a first cylinder surface and fit together to form a complete cylinder; and the reinforcing member (5) is tightly attached to the inner side faces (12) of all the special-shaped loose tubes (1). The optical cable with a high fiber core density has the following main beneficial effects: smaller product diameter, easier manufacturing, there being no need for a cabling and stranding apparatus, reduced material consumption, lower cost, and more rapid manufacturing.

Description

A high-core-density optical cable with higher space utilization

Technical field

The invention belongs to the technical field of electric power and optical cables, and particularly relates to a high-core-density optical cable with higher space utilization.

Background technique

In the prior art, the stranded optical cable, such as the communication industry standard YD/T901 of the People’s Republic of China, uses a central reinforcement and multiple loose tubes to be twisted around the central reinforcement. In this way, the loose tube There is a gap between the loose tube and the reinforcement. On the one hand, it is filled with fillers. On the other hand, the space is wasted and the space utilization rate of the product is low; the core density is not large; on the other hand, with the loose tube The increase in the number of tubes, the larger the diameter of the reinforcement, and the larger the diameter of the cable core, causes the material consumption of the product and the cost of staying at home.

In the prior art, large-core multi-layer stranded optical cables are realized with a multi-layer structure. In order to make the product tangent, the sizes of loose tubes between different layers are different, which causes management troubles and unnecessary diameter increase waste. Moreover, the SZ stranded cable requires a larger site, more expensive equipment investment, equipment maintenance and management costs, equipment worker input, lighting input for work, power input required for equipment operation, etc.; economy.

CN210005762U discloses an embedded optical cable with a plurality of loose tubes, a reinforcement layer is arranged outside the loose tubes, an outer protective layer is extruded outside the reinforcement layer, and at least one optical communication component is arranged inside the loose tubes; The loose tube is fan-shaped. The loose tube is composed of a loose tube body, a clamping unit and a clamping rib. A fiber containing cavity is formed inside the loose tube body, and one end of the clamping rib is connected to a straight side of the loose tube body. The other end is connected with the clamping unit. The loose tube body at the corresponding position on the other straight side forms a clamping groove and a rib-accommodating groove. The clamping unit of the first loose tube is inserted into the clamping unit of the latter In the connecting groove, the clamping unit of the last loose tube is embedded in the clamping groove of the first loose tube; it solves the problem of poor versatility in the same optical cable of the size of the loose tube with different core numbers; it has a structure It is simple, convenient to process, and the casing has good versatility and other beneficial effects.

CN208833968U discloses a dry type fan-shaped tube layer stranded optical fiber cable. The optical cable includes a central strengthening member and a plurality of loose tubes with a fan-shaped cross section. The outer periphery of the central reinforcement member forms a circular cable core, the cable core is covered with a layer of water blocking tape, the water blocking tape is covered with an outer sheath, and the loose tube is filled with a barrier Water fiber, a plurality of optical fibers are arranged in each loose tube. The invention adopts the sector-shaped loose tube to be more compact in structure. The gap between the loose tube and the loose tube, and between the loose tube and the galvanized steel wire is very small, theoretically 0, and the structural accuracy is improved. The diameter of the fiber optic cable is smaller under the number of cores, which improves the utilization rate of the limited pipe space and saves the cost from the raw materials.

CN208045171U discloses an optical fiber composite low-voltage power cable, comprising a support sleeve body, the outer side of the support sleeve body is sequentially provided with an outer shielding layer, an outer waterproof layer and an outer protective sleeve from the inside to the outside, and the outer surface of the outer protective sleeve A wear-resistant layer is embedded; a reinforcing wire is embedded in the support sleeve body, a fan-shaped cavity and a circular cavity are arranged inside the support sleeve body, and the fan-shaped cavities are evenly distributed outside the circular cavity; An electric unit is arranged inside the sector-shaped cavity, a filling layer is arranged between the electric units, and a light unit is arranged inside the circular cavity. The beneficial effects are: the outer waterproof layer, the first inner waterproof layer and the second inner waterproof layer have a waterproof effect, have good waterproof performance, and meet the needs of long-term use; by setting a support sleeve, and embedding a reinforcing wire inside the support sleeve , Can improve the overall strength of the cable, prevent bending damage caused by external force, and help improve the service life of the cable.

technical problem

This application aims to solve the gaps between the loose tubes and between the loose tubes and the reinforcement in the prior art. On the one hand, fillers are used to fill the space, and on the other hand, the space is wasted and the space utilization rate of the product is low; The density is not large; on the other hand, as the number of loose tubes increases, the diameter of the reinforcement becomes larger and the diameter of the cable core becomes larger, which causes the technical problems of product material consumption and cost.

Technical solutions

In order to solve the above-mentioned problems, the purpose of the present invention is to disclose a high-core-density optical cable with higher space utilization rate, which is realized by adopting the following technical solutions.

A high-core-density optical cable with a higher space utilization rate. It has a strength member, six special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer sheath located outside the protective layer Characterized in that: the special-shaped loose casing is composed of a closed casing body, the outer side of the outer wall of the casing body is a part of the second cylindrical surface, and the inner side of the inner wall of the casing body is the first cylindrical surface The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. For optical fiber, the axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The intersection of the first plane and the second plane deviates from the central axis. The central angle is β; in the optical cable, the special-shaped loose tube is distributed symmetrically in the circumferential direction around the outside of the reinforcing member. In the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first of the next special-shaped loose tube. Plane, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube. The outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder. The inner side surfaces of all the special-shaped loose tubes are on the surface of the first cylinder and are assembled into a complete cylinder, and the reinforcing member is in close contact with the inner side surfaces of all the special-shaped loose tubes.

Beneficial effect

The invention has the following main beneficial effects: the product has a smaller diameter, is easier to manufacture, does not require cable stranding equipment, consumes less materials, lowers costs, and manufactures faster.

Description of the drawings

FIG. 1 is a schematic diagram of a three-dimensional structure after anatomy of Example 1. FIG. Fig. 2 is an enlarged schematic cross-sectional structure diagram of Fig. 1. Fig. 3 is a schematic diagram of the dissected three-dimensional structure of a section of the special-shaped loose tube used in Fig. 1. Fig. 4 is an enlarged schematic cross-sectional structure diagram of Fig. 3. FIG. 5 is a schematic diagram of a cross-sectional structure of the special-shaped loose tube used in FIG. 3 after an optical fiber is installed in it. FIG. 6 is a schematic diagram of the cross-sectional structure of Embodiment 2. FIG. Fig. 7 is an enlarged schematic cross-sectional structure diagram of the special-shaped loose tube used in Fig. 6. Fig. 8 is an anatomical three-dimensional schematic diagram of a section of the special-shaped loose tube used in Example 3. Fig. 9 is an enlarged schematic cross-sectional structure diagram of Fig. 8. FIG. 10 is a schematic diagram of the dissected three-dimensional structure of a section of the special-shaped loose tube used in Example 4. FIG. FIG. 11 is an enlarged schematic diagram of the cross-sectional structure of FIG. 10. FIG. 12 is a schematic diagram of the cross-sectional structure of Embodiment 5. FIG. Fig. 13 is a schematic cross-sectional structure diagram of the special-shaped loose tube used in Fig. 12 after an optical fiber ribbon is installed. FIG. 14 is a schematic diagram of the dissected three-dimensional structure of a section of the special-shaped loose tube used in Example 6. FIG. Fig. 15 is an enlarged schematic cross-sectional structure diagram of Fig. 14. 16 is a schematic diagram of the cross-sectional structure of Example 7. Fig. 17 is an enlarged schematic cross-sectional structure diagram of the special-shaped loose tube used in Fig. 16. FIG. 18 is an enlarged schematic diagram of the cross-sectional structure of FIG. 17. Fig. 19 is a schematic cross-sectional structure diagram of the special-shaped loose tube used in Fig. 17 after an optical fiber ribbon is installed in it. 20 is an enlarged schematic cross-sectional structure diagram of the special-shaped loose tube used in Example 8. In order to enable those in the technical field to understand and implement this application more accurately and clearly, the reference signs will be further described below in conjunction with the accompanying drawings of the specification. In the figure: 1-shaped loose tube, 10-fiber containing cavity, 11-set Tube body, 12—inner side, 13—outer side, 3—optical fiber ribbon, 31—optical fiber, 4—insulated wire, 5—reinforcement, 51—cushion, 6—protective layer, 7—outer sheath.

The best mode of the present invention

Implementation example 1 , please refer to Figures 1 to 5, a high-core-density optical cable with higher space utilization rate, with a strength member 5, six special-shaped loose tubes located outside the strength member 1. All the special-shaped loose tubes are wrapped Covering the protective layer 6, the outer sheath 7 located outside the protective layer; it is characterized in that: the special-shaped loose tube 1 is composed of a closed casing body 11, and the outer surface 13 of the outer wall of the casing body 11 is the second Part of the cylindrical surface, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the first cylindrical surface, the outer surface of the left side wall of the sleeve body 11 is the first plane, and the right side wall of the sleeve body 11 The outer surface is a second plane, the inside of the sleeve body 11 has a fiber-containing cavity 10, and a plurality of optical fibers 31 are provided in the fiber-containing cavity 10. The axis of the first cylinder coincides with the axis of the second cylinder and is called The central axis, the intersection of the first plane and the second plane deviates from the central axis, the central angle of the inner side is β, and the central angle of the outer side is β; in the optical cable, the special-shaped loose tube is symmetrical in the circumferential direction around the outside of the reinforcing member Distribution, in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first plane of the next special-shaped loose tube, and the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube In the first plane, the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder, and the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and are assembled into a complete cylinder. The body and the reinforcement are in close contact with the inner surface of all special-shaped loose tubes.

The above-mentioned high-core-density optical cable with higher space utilization rate is characterized in that the central angle of the inner side surface is β and the central angle of the outer side surface is both 60 degrees.

Embodiments of the present invention

Implementation example 2 , please refer to Figure 6 and Figure 7, and refer to Figures 1 to 5, a high-core density optical cable with higher space utilization, with a strength member 5 and four special-shaped loose tubes located outside the strength member 1. A protective layer 6 covering all the special-shaped loose tubes, and an outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tubes 1 are composed of a closed sleeve body 11, and the sleeve body 11 The outer surface 13 of the outer wall of the sleeve body 11 is a part of the surface of the second cylinder, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the surface of the first cylinder, and the outer surface of the left side wall of the sleeve body 11 is a first plane, The outer surface of the right side wall of the sleeve body 11 is a second plane. The sleeve body 11 has a fiber-containing cavity 10 inside. The fiber-containing cavity 10 has a plurality of optical fibers 31. The axis of the first cylinder and the second cylinder The axis where the body is located coincides and is called the central axis. The first plane and the second plane intersect at the central axis, the central angle of the inner side is β, and the central angle of the outer side is β; The reinforcement members are distributed symmetrically along the circumferential direction. In the clockwise direction, the second plane of the last special-shaped loose tube is close to the first plane of the next special-shaped loose tube, and the second plane of the last special-shaped loose tube is close to the first plane. The first plane of a special-shaped loose tube, the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder, and the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder. It is assembled into a complete cylinder, and the reinforcement is in close contact with the inner surface of all the special-shaped loose tubes.

The above-mentioned high-core-density optical cable with higher space utilization is characterized in that the central angle of the inner side is β and the central angle of the outer side is both 90 degrees.

Implementation example 3 , please refer to Figures 8 and 9, refer to Figures 1 to 7, a high-core-density optical cable with higher space utilization, with a reinforcement 5 and a plurality of special-shaped loose tubes 1 located outside the reinforcement , The protective layer 6 covering all the special-shaped loose tubes, and the outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tube 1 is composed of a closed sleeve body 11, the sleeve body 11 The outer surface 13 of the outer wall is a part of the surface of the second cylinder, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the surface of the first cylinder, and the outer surface of the left side wall of the sleeve body 11 is a first curved surface. The outer surface of the right side wall of the tube body 11 is a second curved surface. The sleeve body 11 has a fiber-containing cavity 10 inside. The fiber-containing cavity 10 has a plurality of optical fibers 31. The axis of the first cylinder and the second cylinder The axis coincides with each other and is called the central axis. The first curved surface protrudes to the left, and the first curved surface is recessed in the direction of the fiber containing cavity 10; in the optical cable, the special-shaped loose tube is symmetrically distributed around the outside of the reinforcing member in the circumferential direction, In the clockwise direction, the second curved surface of the previous special-shaped loose tube closely adheres to the first curved surface of the next special-shaped loose tube, and the second curved surface of the last special-shaped loose tube closely adheres to the first curved surface of the first special-shaped loose tube. Curved surface, the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and assembled into a complete cylinder, and the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and assembled into a complete cylinder, The reinforcement is in close contact with the inner surface of all special-shaped loose tubes.

Implementation example 4 , please refer to Figure 10 and Figure 11, and refer to Figure 1-7, a high-core-density optical fiber cable with higher space utilization rate, with reinforcement 5, multiple shaped loose tubes 1 outside the reinforcement , The protective layer 6 covering all the special-shaped loose tubes, and the outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tube 1 is composed of a closed sleeve body 11, the sleeve body 11 The outer surface 13 of the outer wall is a part of the surface of the second cylinder, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the surface of the first cylinder, and the outer surface of the left side wall of the sleeve body 11 is the first plane. The outer surface of the right side wall of the tube body 11 is a second plane. The sleeve body 11 has a fiber-containing cavity 10 inside. The fiber-containing cavity 10 has multiple optical fiber ribbons 3, and each optical fiber ribbon has multiple optical fibers 31. The axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The intersection of the first plane and the second plane deviates from the central axis. The central angle of the inner side is equal to the central angle of the outer side. The angle between the first plane and the second plane is β, the fiber containing cavity is approximately a cuboid shape, the optical fiber ribbons are distributed in the fiber containing cavity in a layered manner, and the length direction of the fiber ribbon is parallel to the length direction of the fiber containing cavity; In the optical cable, the special-shaped loose tube is symmetrically distributed in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first plane of the next special-shaped loose tube, and the last one is The second plane of the loose tube is close to the first plane of the first special-shaped loose tube. The outer sides of all special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder. All special-shaped loose tubes The inner side surface of the first cylinder is on the surface of the first cylinder and is assembled into a complete cylinder, and the reinforcing member is in close contact with the inner side of all the special-shaped loose tubes.

The length of the rectangular parallelepiped is approximately parallel to the first plane and the second plane.

Implementation example 5 , please refer to Figures 12 and 13, and refer to Figures 1-13, a high-core-density optical cable with higher space utilization, with a reinforcement 5 and a plurality of special-shaped loose tubes 1 located outside the reinforcement , The protective layer 6 covering all the special-shaped loose tubes, and the outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tube 1 is composed of a closed sleeve body 11, the sleeve body 11 The outer surface 13 of the outer wall is a part of the surface of the second cylinder, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the surface of the first cylinder, and the outer surface of the left side wall of the sleeve body 11 is the first plane. The outer surface of the right side wall of the tube body 11 is a second plane. The sleeve body 11 has a fiber-containing cavity 10 inside. The fiber-containing cavity 10 has a plurality of optical fiber ribbons 3, and each optical fiber ribbon has a plurality of optical fibers. The sleeve body 11 between the fiber cavity and the inner surface 12 of the inner wall of the sleeve body 11 has a power hole, and the power hole has an insulated wire 4, and the axis of the first cylinder coincides with the axis of the second cylinder. And called the central axis, the intersection of the first plane and the second plane deviates from the central axis, the central angle of the inner side is equal to the central angle of the outer side, and the angle between the first plane and the second plane is β. The fiber cavity is approximately trapezoidal cylindrical shape. The lower bottom surface of the trapezoidal cylindrical shape is close to the outer side surface 13 of the outer wall of the sleeve body 11. The optical fiber ribbons are distributed in the fiber containing cavity in a layered manner. Stacked in the other waist direction; in the optical cable, the special-shaped loose tube is symmetrically distributed along the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the next special-shaped loose tube. The first plane, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube, the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder The inner surface of all the special-shaped loose tubes is on the surface of the first cylinder and is assembled into a complete cylinder, and the reinforcing member is in close contact with the inner side of all the special-shaped loose tubes.

The upper and lower bottom surfaces of the above-mentioned trapezoid are approximately perpendicular to the first plane and the second plane.

Implementation example 6 , please see Figure 14 and Figure 15, a high-core density optical cable with higher space utilization, with a reinforcing member 5, a cushion layer 51 covering the reinforcing member, and a plurality of special-shaped wires located outside the cushion layer Loose tube 1, a protective layer 6 covering all the special-shaped loose tubes, and an outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tube 1 is composed of a closed sleeve body 11, the sleeve The outer surface 13 of the outer wall of the pipe body 11 is a part of the second cylinder surface, the inner surface 12 of the inner wall of the sleeve body 11 is a part of the first cylinder surface, and the outer surface of the left side wall of the sleeve body 11 is the first cylinder. The outer surface of the right side wall of the sleeve body 11 is the second plane. The sleeve body 11 has a fiber-containing cavity 10 inside. The fiber-containing cavity 10 has multiple optical fiber ribbons 3, and each optical fiber ribbon has multiple For an optical fiber, the axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The first plane and the second plane intersect on the central axis, the center angle of the inner side is β, and the center of the outer side The angle is β, the fiber containing cavity is approximately trapezoidal cylindrical shape, the bottom surface of the trapezoidal cylindrical shape is close to the outer side surface 13 of the outer wall of the sleeve body 11, and the optical fiber ribbon is distributed in the fiber containing cavity in a layered manner. The length direction of the optical fiber ribbon Stacked from one waist to the other waist of the fiber-containing cavity; in the optical cable, the special-shaped loose tube is symmetrically distributed in the circumferential direction around the cushion layer, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to The first plane of the next special-shaped loose tube, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube, and the outer surfaces of all the special-shaped loose tubes are on the surface of the second cylinder And assembled into a complete cylinder, the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and assembled into a complete cylinder, and the reinforcing member is in close contact with the inner sides of all the special-shaped loose tubes.

Implementation example 7 , see Figure 16 to Figure 19, a high-core-density optical cable with higher space utilization, with a reinforcement 5, multiple special-shaped loose tubes outside the reinforcement 1, and all special-shaped loose tubes The covered protective layer 6, the outer sheath 7 located outside the protective layer; characterized in that: the special-shaped loose tube 1 is composed of a closed casing body 11, and the outer surface 13 of the outer wall of the casing body 11 is the first The inner surface 12 of the inner wall of the sleeve body 11 is a part of the first cylindrical surface, the outer surface of the left side wall of the sleeve body 11 is the first plane, and the right side wall of the sleeve body 11 The outer surface of the sleeve body 11 is the second plane, the inside of the sleeve body 11 has a fiber-containing cavity 10, and the fiber-containing cavity 10 has multiple optical fiber ribbons 3, and each optical fiber ribbon has multiple optical fibers. The axis of the first cylinder is aligned with The axis of the second cylinder coincides and is called the central axis. The first plane and the second plane intersect at the central axis. The central angle of the inner side is β, and the central angle of the outer side is β. The fiber containing cavity is a rectangular parallelepiped. The lower bottom surface of the cuboid shape is close to the outer side surface 13 of the outer wall of the sleeve body 11, the optical fiber ribbons are distributed in the fiber containing cavity in a layered manner, and the length direction of the optical fiber ribbons is stacked from one bottom surface of the fiber containing cavity to the other bottom surface direction; In the optical cable, the special-shaped loose tube is symmetrically distributed in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first plane of the next special-shaped loose tube, and the last one is The second plane of the loose tube is close to the first plane of the first special-shaped loose tube. The outer sides of all special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder. All special-shaped loose tubes The inner side surface of the first cylinder is on the surface of the first cylinder and is assembled into a complete cylinder, and the reinforcing member is in close contact with the inner side of all the special-shaped loose tubes.

The length direction of the rectangular parallelepiped shape is approximately parallel to the first plane and the second plane.

In this embodiment, the fiber-containing cavity may also have a cylindrical shape with a parallelogram cross section, and the length direction of the parallelogram cross section is approximately parallel to the first plane and the second plane.

Implementation example 8 , please refer to Figure 20, refer to Figure 16 to Figure 19, a high-core density optical cable with higher space utilization, basically the same as the implementation example 7, the difference is: the left side of the special-shaped loose tube 1 The side or upper side is empty, that is, the fiber-containing cavity 10 opens to the left side or upper side of the special-shaped loose tube 1, and the optical fiber ribbon or optical fiber is placed in the fiber-containing cavity 10; furthermore, insulated wires can be placed.

Furthermore, the opening on the left side or upper side of the special-shaped loose tube 1, that is, the opening size is only a part, not as large as in Fig. 20, and it is only allowed to insert optical fibers or optical fiber ribbons or insulated wires. Normally The lower part cannot escape from the opening; the opening described above is suitable for any embodiment in this application.

A high-core-density optical fiber cable with higher space utilization rate described in this application is characterized in that the left side near the center part of the profiled loose tube, that is, the upper side near the center part, is empty, that is, the fiber-containing cavity is open to The left side of the special-shaped loose tube or the fiber-containing cavity opens to the upper side of the special-shaped loose tube, and the optical fiber ribbon or optical fiber or insulated wire is placed in the fiber-containing cavity; In the fiber cavity, if no force is used to open the opening, the optical fiber ribbon or optical fiber or insulated wire will not escape from the opening.

In this application, the number of special-shaped loose tubes in each implementation example is not limited to that in the embodiment, and can also be other multiple, or n, n is not less than 2; correspondingly, the angle β is 360/n degrees.

In this application, the inner surface of the inner wall of the sleeve body can be shrunk into a line, which is shrunk to a point when viewed in cross section. After a plurality of special-shaped loose sleeves in the optical cable are joined together, it appears as the axis of the optical cable.

The high-core-density optical cable with higher space utilization rate described in this application is characterized in that the material of the shaped loose tube is modified polypropylene or polybutylene terephthalate or polytetrafluoroethylene Ethylene or polyethylene or other plastics or steel or iron or aluminum or copper or alloys.

The high-core-density optical fiber cable with higher space utilization rate described in this application is characterized in that the model of the optical fiber is G.651 or G.652 or G.653 or G.654 or G.655 or G. .656 or G.657 or A1a or A1b or A1c or A1d.

The high-core-density optical cable with higher space utilization rate described in this application is characterized in that the insulated wire is composed of a conductor, or is composed of a conductor and an insulating layer covering the conductor.

The high-core-density optical cable with higher space utilization rate described in this application is characterized in that the material of the reinforcing member is steel or copper or iron or aluminum or glass fiber reinforced plastic or aramid yarn rope or nylon rope Or glass fiber rope or mixed material rope.

In fact, this application can also dispense with the polyester yarn binding in the prior art. In addition, the protective layer can also be omitted. Of course, multiple protective layers can also be added within the cable core and the outer sheath.

The high-core-density optical cable with higher space utilization rate described in this application is characterized in that the material of the cushion layer is plastic, preferably polyethylene or polypropylene.

The high-core-density optical fiber cable with higher space utilization rate described in this application is characterized in that the material of the protective layer is steel tape, aluminum tape, copper tape, polyester tape, nylon tape, or polyester yarn Or water blocking tape or glass fiber tape or plastic.

The high-core-density optical cable with higher space utilization rate described in this application is characterized in that the material of the outer sheath is low-density polyethylene or medium-density polyethylene or high-density polyethylene or polyvinyl chloride or Low-smoke halogen-free polyethylene or low-smoke low-halogen polyethylene nylon.

In this application, the preferred solution is that the colors of any two special-shaped loose tubes are different, so that they can be easily distinguished from each other. The more commonly used colors are: blue, orange, green, brown, gray, and white (this one) , Red, black, yellow, purple, pink, cyan; can be selected one by one; other colors that are easy to distinguish can also be used.

In order to facilitate the processing, it can also be realized in a three-color way. For example, there are red, green, and white (natural) colors in the special-shaped loose tube. For example, when there are more than three, one is red, one is green, Others are natural colors, so as long as they are arranged in an artificially prescribed order, such as clockwise arrangement: red, green, ben, ben····································································· Such as the number of basic color tubes behind red and green, and so on.

In this application, the arrangement of the special-shaped loose tubes in a clockwise direction is just for convenience of description. In fact, counterclockwise is also possible, as long as one of the two ends of a cable is the same as in the embodiment.

The special-shaped loose tube in this application can be replaced by a part of the special-shaped filling rope, which has the same shape and size as the special-shaped loose tube, except that there is no optical fiber or cable ribbon inside, or no fiber-tolerant inside at all. For the cavity, the material of the special-shaped filling rope can be the same as or different from the special-shaped loose tube, preferably plastic, and foamed material can also be used.

In this application, the adjacent special-shaped loose tubes are in close contact with each other, which overcomes the inevitable gap between the adjacent loose tubes due to the cylindrical loose tubes in the prior art, and the adjacent loose tubes and There is a gap between the reinforcements, which causes a problem of wasting space; since there is no gap in this application, the space utilization rate is higher. Because the special-shaped loose tube is used to replace the cylindrical loose tube in the prior art, the use of the gap makes the length of the special-shaped loose tube outward along the axis become shorter, so that the special-shaped loose tube and the reinforcement are formed The diameter of the cable core becomes smaller. Further, the diameter of the protective layer and outer sheath outside the cable core becomes smaller accordingly. When the same thickness is required, the material consumption is greatly reduced, resulting in a significant cost reduction.

This application also brings unexpected beneficial technical effects for optical cables with larger core counts and without optical fiber ribbons, which are mainly manifested in: (1) In the prior art, the stranded optical cable is formed by SZ stranding Cable core, SZ stranding equipment occupies a large space, usually a production line is about 50 meters in length; in addition, SZ stranding equipment is generally hundreds of thousands of yuan, and requires workers and equipment to consume electricity during assembly, debugging, and production. It is relatively large and requires lighting at night; and after adopting the structure of this application, the special-shaped loose tube is produced on the original loose tube production equipment, but the mold is redesigned; SZ stranded cable equipment is not required, which not only saves space, but also Moreover, there is no need for assembly, debugging, no cable production workers, no electricity and lighting fees for cable forming equipment, etc.; instead, finished cables are made on the sheath production line, which greatly saves costs; (2) In the prior art, the pay-off racks and twisting heads of the cabling equipment are restricted. Generally speaking, only 12 pay-off racks are set, and it is also set in the program. When there are less than 12 loose tubes, they can be selected and used; When there are 12 loose tubes, all are used; because the loose tube production equipment generally supports the maximum number of cores in the loose tube is 12 cores; to produce a large number of cores, it needs to be produced in sections, such as two cables. Or many times, accurately design and calculate the diameter of the first cable core, and then design the 12 cables for the second time, so that the loose tube is tangent to each other and the loose tube is tangent to the first layer of cable core. It is necessary to adjust the size of the second layer or the first layer of loose tube. Different loose tube sizes will bring troubles to management, and are not standard products, which are difficult to use in the future. Moreover, in order to make the optical fiber longer than the loose tube, that is Forming a primary excess length; and forming a secondary excess length in the cabling, so that it has sufficient resistance, temperature and other properties, and remains stable under allowable changes in conditions. The loose tube cannot be designed too small. Performance requirements; too large, resulting in an increase in cost and a decrease in product competitiveness; and in this application, the above-mentioned problems are cleverly avoided, and the length and height of the special-shaped loose tube can be elongated and the height is relatively compressed, thus increasing It saves space, increases the number of special-shaped loose tubes, and at the same time increases the number of optical fibers accommodated, that is, increases the density of optical fibers; as shown in Figure 16 in this application, there are 24 special-shaped loose tubes, which can be molded at one time. There are technologies that require two times; and, after precise design and calculation, the length of the above-mentioned special-shaped loose tube is elongated, and two layers of loose tube (12 in the inner layer and 12 in the outer layer) are used in the prior art. In comparison, the diameter of the cable core is still reduced by 35.18%, that is, the overall diameter of the product is also reduced, the material consumption is also reduced, the cost is lower, the space utilization efficiency is higher, and the external space is less occupied when laying; and the product is lightweight Later, the transportation cost is also significantly reduced. In addition, there is no need to maintain the cable equipment; (3) The core structure of the stranded optical cable in the prior art has a reinforcement or a central reinforcement. Multiple loose tubes, multiple roots are n, referred to as 1+n structure; for example, in the 1+6 structure, if the diameter of the loose tube is a, then the diameter of the reinforcement is a, and the diameter of the cable core is slightly larger than 3a ( The reinforcement is generally a little larger than the theoretical one, and in order to stabilize the structure of the cable core, the cable core will be wrapped with polyester yarn, and the diameter increase caused by the polyester yarn is about 0.3mm); for example, in the 1+8 structure, If the diameter of the loose tube is a, then the diameter of the reinforcement is 1.6131a+, and the diameter of the cable core is slightly larger than 3.6131a (the reinforcement is generally a little larger than the theoretical one, and in order to stabilize the structure of the cable core, the cable core will be wrapped and gathered. The diameter increase caused by ester binding yarn and polyester binding yarn is about 0.3mm); for example, in the 1+10 structure, if the diameter of the loose tube is a, then the diameter of the reinforcement is 2.2361a+, and the diameter of the cable core is slightly larger than 4.2361a ( The reinforcement is generally a little larger than the theoretical one, and in order to stabilize the structure of the cable core, the polyester tying yarn is wrapped around the cable core, and the diameter increase caused by the polyester tying yarn is about 0.3mm); for example, in the 1+12 structure, If the diameter of the loose tube is a, then the diameter of the reinforcement is 2.8637a, and the diameter of the cable core is slightly larger than 4.8637a+ (the reinforcement is generally a little larger than the theoretical one, and in order to stabilize the structure of the cable core, the cable core will be wrapped and gathered. The diameter increase caused by ester binding yarn and polyester binding yarn is about 0.3mm); that is, if the value of n is too large, the size of the reinforcement will be larger, because the role of the reinforcement is to add pieces and provide fit, make the structure stable and round, For this reason, under the premise of sufficient force value, in order to save costs, reduce the weight of the optical cable and other reasons, it is often achieved by extruding a plastic cushion layer outside the reinforcement; Use cushions, so that the shaped loose tube is moved inward as a whole, as long as the space inside the shaped loose tube can accommodate the optical fiber or fiber ribbon, and there is enough gap to ensure that it can still ensure the optical fiber even when the mechanical and temperature changes. The performance is stable; at the same time, the thickness of the cushion layer can also be reduced, and the special-shaped loose tube is also moved inward. According to the applicant's actual production and calculation, for the 1+12 structure, the cable core diameter was originally 4.8637a+, but this application is adopted After the structure, without the cushion layer, the cable core diameter is 3.26a, that is, the same number of cores, the cable core diameter is only 67.03% of the prior art; significantly saves external materials and reduces the diameter of the product.

In this application, the optical fiber cable with a large number of cores and the optical fiber ribbon not only has the beneficial effects of the above-mentioned optical fiber cable without the optical fiber ribbon, but the optical fiber ribbon is different from the prior art. The slot opening is outward, that is, it is recessed from the outer circumference of the frame to the center of the frame, and then the length of the fiber ribbon is stacked on the bottom of the frame slot, and then stacked up, and then the opening of the frame slot is sealed with a protective layer, and it is separated or taken out. The protective layer is divided and the optical fiber ribbon is taken out. In this application, the optical fiber ribbon and its distribution are different. The direction of the optical fiber ribbon is rotated by nearly 90 degrees relative to the direction in the prior art. The outer side or inner side of the sleeve is almost vertical. This kind of direction change is not easy for the technicians to think of. The above-mentioned direction transposition solves how to make the optical fiber ribbon occupy a better space in the special-shaped loose tube and be more suitable for loosening. The technical problem in the optical cable of the sleeve structure; in addition, the left or right side of the special-shaped loose tube has an opening, and the opening can keep the inner optical fiber ribbon stable under normal conditions and not escape from the opening, which is not only Makes it easy to produce, and in optical cable products, the opening is covered by the adjacent loose tube. During inspection, construction, etc., after removing the protective layer, you can take out the entire shaped loose tube from the opening. The internal optical fiber or optical fiber ribbon is extremely convenient. It only needs to be inserted after the work is completed, and the structure can still be kept intact and stable. However, the skeleton type optical cable in the prior art cannot be realized, and the skeleton type optical fiber cable in the prior art still needs to be used More complicated measures are required to cover the frame groove to stabilize the structure.

Industrial applicability

This application has been implemented. The invention has the following main beneficial effects: the product has a smaller diameter, is easier to manufacture, does not require cable stranding equipment, consumes less materials, lowers costs, and manufactures faster.

The above-mentioned embodiments are only preferred technical solutions of the present invention, and should not be regarded as limitations to the present invention. The protection scope of the present invention should be based on the technical solutions described in the claims, including equivalent replacement solutions of the technical features in the technical solutions described in the claims. That is, equivalent replacement and improvement within this scope are also within the protection scope of the present invention.

Claims

A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. For an optical fiber, the axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The intersection of the first plane and the second plane deviates from the central axis. The central angle of the inner side is β, and the outer side The central angle of the optical cable is β; in the optical cable, the special-shaped loose tube is distributed symmetrically in the circumferential direction around the outside of the reinforcing member. One plane, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube, and the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and assembled into a complete cylinder , The inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and are assembled into a complete cylinder, and the reinforcement is closely attached to the inner side of all the special-shaped loose tubes. The angle of β is 360/n , N is a positive integer greater than or equal to 2.
A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. For an optical fiber, the axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The first plane and the second plane intersect on the central axis, the center angle of the inner side is β, and the center of the outer side The angle is β; in the optical cable, the special-shaped loose tube is distributed symmetrically in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first plane of the next special-shaped loose tube , The second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube. The inner surface of the special-shaped loose tube is on the surface of the first cylinder and is assembled into a complete cylinder. The reinforcement is closely attached to the inner side of all the special-shaped loose tubes. The angle of β is 360/n, n It is a positive integer greater than or equal to 2.
A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is a first curved surface, and the outer surface of the right side wall of the sleeve body is a second curved surface. For an optical fiber, the axis where the first cylinder is located coincides with the axis where the second cylinder is located and is called the central axis, the first curved surface protrudes to the left, and the first curved surface is recessed toward the fiber-containing cavity; in the optical cable, The special-shaped loose tube is distributed symmetrically in the circumferential direction around the outside of the reinforcement. In the clockwise direction, the second curved surface of the previous special-shaped loose tube is close to the first curved surface of the next special-shaped loose tube, and the second surface of the last special-shaped loose tube The second curved surface is close to the first curved surface of the first special-shaped loose tube. The outer sides of all special-shaped loose tubes are on the surface of the second cylinder and assembled into a complete cylinder. The inner sides of all special-shaped loose tubes are on the second cylinder. On the surface of a cylinder, it is assembled into a complete cylinder, and the reinforcement is closely attached to the inner surface of all the special-shaped loose tubes.
A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. A fiber ribbon, each fiber ribbon contains multiple fibers. The axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The intersection of the first plane and the second plane deviates from the central axis , The central angle of the inner side is equal to the central angle of the outer side, the angle between the first plane and the second plane is β, the fiber-containing cavity is approximately a rectangular parallelepiped, and the optical fiber ribbons are distributed in the fiber-containing cavity in a laminated manner And the length direction of the optical fiber ribbon is parallel to the length direction of the fiber-containing cavity; in the optical fiber cable, the special-shaped loose tube is symmetrically distributed in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the previous special-shaped loose tube is close to The first plane of the next special-shaped loose tube, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube, and the outer surfaces of all the special-shaped loose tubes are on the surface of the second cylinder And assembled into a complete cylinder, the inner surface of all the special-shaped loose tubes is on the surface of the first cylinder and assembled into a complete cylinder, the reinforcement is closely attached to the inner side of all the special-shaped loose tubes, where β The number of angles is 360/n, where n is a positive integer greater than or equal to 2.
A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. There are multiple optical fibers in each optical fiber ribbon. The sleeve body between the fiber-containing cavity and the inner surface of the inner wall of the sleeve body has a power hole, and the power hole has an insulated wire. The first cylinder is located The axis coincides with the axis where the second cylinder is located and is called the central axis. The intersection of the first plane and the second plane deviates from the central axis. The central angle of the inner side is equal to the central angle of the outer side. The angle between the planes is β. The fiber-containing cavity is approximately trapezoidal cylindrical shape. The lower bottom surface of the trapezoidal cylindrical shape is close to the outer side surface of the outer wall of the casing body. The optical fiber ribbons are distributed in the fiber-containing cavity in a laminated manner. The length direction is stacked from one waist to the other waist of the fiber-containing cavity; in the optical cable, the special-shaped loose tube is symmetrically distributed in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, the second plane of the upper special-shaped loose tube Close to the first plane of the next special-shaped loose tube, the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube, and the outer surface of all special-shaped loose tubes is in the second cylinder On the surface and assembled into a complete cylinder, the inner sides of all special-shaped loose tubes are on the surface of the first cylinder and assembled into a complete cylinder. , The number of angles of β is 360/n, and n is a positive integer greater than or equal to 2.
A high-core-density optical cable with a higher space utilization rate. It has a reinforcing member, a cushion layer covering the reinforcing member, a plurality of special-shaped loose tubes outside the cushion layer, and all the special-shaped loose tubes covering A protective layer, an outer sheath located outside the protective layer; it is characterized in that the special-shaped loose tube is composed of a closed casing body, the outer surface of the outer wall of the casing body is a part of the surface of the second cylinder, and the casing body The inner side of the inner wall of the sleeve body is a part of the surface of the first cylinder, the outer surface of the left side wall of the sleeve body is the first plane, the outer surface of the right side wall of the sleeve body is the second plane, and the inside of the sleeve body has Fiber-containing cavity, there are multiple optical fiber ribbons in the fiber-containing cavity, and each optical fiber ribbon has multiple optical fibers. The axis of the first cylinder and the axis of the second cylinder coincide with each other and are called the central axis, the first plane Intersect the second plane on the central axis, the central angle of the inner side is β, the central angle of the outer side is β, the fiber containing cavity is approximately trapezoidal cylindrical shape, and the lower bottom surface of the trapezoidal cylindrical shape is close to the outer wall of the casing body On the side, the optical fiber ribbons are distributed in the fiber-containing cavity in a layered manner, and the length direction of the optical fiber ribbons is stacked from one waist to the other waist of the fiber-containing cavity; Distribution, in the clockwise direction, the second plane of the previous special-shaped loose tube is close to the first plane of the next special-shaped loose tube, and the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube In the first plane, the outer sides of all the special-shaped loose tubes are on the surface of the second cylinder and are assembled into a complete cylinder, and the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and are assembled into a complete cylinder. Body, the reinforcement is in close contact with the inner surface of all special-shaped loose tubes, where the angle of β is 360/n, and n is a positive integer greater than or equal to 2.
A high-core-density optical fiber cable with a higher space utilization rate. It has a strength member, a plurality of special-shaped loose tubes outside the strength member, a protective layer covering all the special-shaped loose tubes, and an outer protective layer outside the protective layer. Sleeve; characterized in that: the special-shaped loose sleeve is composed of a closed sleeve body, the outer side of the outer wall of the sleeve body is a part of the surface of the second cylinder, and the inner side of the inner wall of the sleeve body is the first cylinder The outer surface of the left side wall of the sleeve body is the first plane, and the outer surface of the right side wall of the sleeve body is the second plane. Each optical fiber ribbon contains multiple optical fibers. The axis of the first cylinder coincides with the axis of the second cylinder and is called the central axis. The first plane and the second plane intersect at the central axis. The central angle of the side surface is β, and the central angle of the outer side is β. The fiber-containing cavity is a rectangular parallelepiped. The lower bottom surface of the cuboid shape is close to the outer surface of the outer wall of the sleeve body. The optical fiber ribbon is laminated in the fiber-containing cavity. The length direction of the optical fiber ribbon is stacked from one bottom to the other bottom of the fiber-containing cavity; in the optical cable, the special-shaped loose tube is distributed symmetrically in the circumferential direction around the outside of the reinforcing member, and in the clockwise direction, a special-shaped loose tube The second plane is close to the first plane of the next special-shaped loose tube, and the second plane of the last special-shaped loose tube is close to the first plane of the first special-shaped loose tube. On the surface of the second cylinder and assembled into a complete cylinder, the inner sides of all the special-shaped loose tubes are on the surface of the first cylinder and assembled into a complete cylinder, and the reinforcement is in line with the inner sides of all special-shaped loose tubes. Closely, where the angle of β is 360/n, and n is a positive integer greater than or equal to 2.