CN118502052B - Nonmetallic layer stranded optical cable - Google Patents
Nonmetallic layer stranded optical cable Download PDFInfo
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- CN118502052B CN118502052B CN202410981637.7A CN202410981637A CN118502052B CN 118502052 B CN118502052 B CN 118502052B CN 202410981637 A CN202410981637 A CN 202410981637A CN 118502052 B CN118502052 B CN 118502052B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4436—Heat resistant
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention relates to the technical field of layer-stranded optical cables, in particular to a nonmetallic layer-stranded optical cable, which comprises a nonmetallic reinforcing piece arranged in the center of the optical cable; twisting a plurality of optical communication units arranged on the periphery of the nonmetal reinforcing piece; the composite fiber wrapping layer and the sheath layer are sequentially arranged outside the optical communication unit from inside to outside; the composite fiber wrapping band layer comprises a first fiber woven layer, a second fiber woven layer and a plurality of joggles uniformly distributed between the first fiber woven layer and the second fiber woven layer in a stranding mode; the embedded body comprises an embedded groove with one opening and embedded pieces arranged in the embedded grooves, wherein the closed ends of the embedded grooves are attached to the first fiber weaving layer and fixed through an adhesive, and the opening ends of the embedded grooves face to the second fiber weaving layer.
Description
Technical Field
The invention relates to the technical field of layer-stranded optical cables, in particular to a nonmetallic layer-stranded optical cable.
Background
The layer twisted optical cable is one kind of optical cable structure for communication network and features that the reinforcing part is set in the center of the optical cable and the optical fiber units are wrapped around the reinforcing part in spiral twisting mode. The structure can effectively and uniformly distribute mechanical stress, increases the tensile strength and the compressive property of the optical cable, and has better flexibility, so that the structure has wide application in long-distance transmission and severe environments.
While conventional twisted-pair cables perform well, the presence of their metallic strength members can make the cable inadequate in certain applications. For example, metallic materials are susceptible to corrosion and signal interference is easily generated in high electromagnetic interference environments. In addition, the metal optical cable has a large weight and high construction and maintenance costs. To solve these problems, nonmetallic layer-twisted type optical cables have been developed. The nonmetallic layer-twisted optical cable is favored by users because it does not contain metal materials, is light in weight, is not disturbed by lightning, and does not need to be grounded in construction or work. But also have some problems in mechanical properties.
Specifically, the conventional nonmetallic optical cable has relatively weak tensile performance in design, is difficult to cope with complex and changeable laying environments, and is easily affected by tensile stress particularly when aerial or underground laying is performed, so that the performance of the optical cable is reduced. Chinese patent publication No. CN105511036B discloses a nonmetallic layer-twisted optical cable, which comprises a central reinforcement member located in the center of the optical cable, a loose tube arranged outside the central reinforcement member and containing a plurality of optical fibers in a unidirectional or bidirectional spiral twisting manner, a protective layer covering the loose tube, and a sheath layer located outside the protective layer. A non-metal belt is arranged between the protective layer and the sheath layer, and consists of a coating layer and a plurality of adding pieces; or the non-metal belt is composed of a coating layer, a plurality of reinforcement holes which are arranged in parallel in the coating layer and are not contacted with each other, and the axes of the reinforcement holes are in the same plane, and a plurality of reinforcement pieces, wherein each reinforcement piece is provided with one reinforcement piece. This technique requires elaborate equipment and processes to ensure accurate positioning and fixing of the augment or augment holes in the non-metallic strip, which increases manufacturing difficulty and production costs. Also, the non-metallic tape, while increasing strength, may have insufficient toughness and elasticity of the material in the face of impact and bending, especially in low or high temperature environments, resulting in an optical cable that is easily broken or damaged.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the nonmetallic layer stranded optical cable is provided, the overall tensile strength and the compressive strength of the optical cable are enhanced, and the optical cable is ensured not to be easily damaged when being subjected to external force.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The nonmetallic layer stranded optical cable comprises a nonmetallic reinforcing part arranged at the center of the optical cable, and an optical communication unit, a composite fiber wrapping layer and a sheath layer which are sequentially arranged outside the nonmetallic reinforcing part from inside to outside, wherein a plurality of optical communication units are arranged and stranded at the periphery of the nonmetallic reinforcing part in an annular equidistant manner;
The composite fiber wrapping band layer comprises a first fiber woven layer, a second fiber woven layer and a plurality of joggles uniformly distributed between the first fiber woven layer and the second fiber woven layer in a stranding mode; each mosaic body comprises a mosaic groove with one open end and a mosaic piece arranged in the mosaic groove, the closed end of the mosaic groove is attached to the first fiber weaving layer and fixed through an adhesive, the open end of the mosaic groove faces the second fiber weaving layer, and one end of the mosaic piece, which is far away from the mosaic groove, is abutted against the second fiber weaving layer.
Further, the embedded groove is a cavity with an arc-shaped cross section, the bottom of the embedded groove is attached to the first fiber woven layer and fixed through an adhesive, and the linear distance between the bottom of the embedded groove and the opening end is larger than the radius of the embedded piece.
Further, the jogged piece includes tensile element and rope that blocks water, and the diameter of tensile element, rope that blocks water is the same with the inside diameter of jogged groove.
Further, the tensile element and the water-blocking ropes are arranged in a plurality of jogged grooves at intervals, the jogged grooves are made of flame-retardant polyurethane materials, and when the water-blocking ropes absorb water and expand, the opening ends of the arc-shaped cavities expand towards the direction away from the axle center of the arc-shaped cavities.
Further, the interval between two adjacent fitting grooves is equal to the width of one fitting groove.
Further, the first fiber woven layer is woven by glass fiber yarns, the tensile element is high-modulus polyester fibers, and the diameter ratio of the high-modulus polyester fibers to the glass fiber yarns is 2-3:1.
The composite fiber wrapping tape layer coated with the adhesive is cured, so that the adhesive is fully cured and firmly adhered to the first fiber weaving layer and the embedded groove.
Further, the nonmetallic reinforcing parts are made of glass fiber reinforced plastic or polyimide materials.
Further, the optical communication unit comprises a loose tube, an optical fiber is arranged in the loose tube, and a water blocking coating is coated on the surface of the optical fiber; the outer part of the loose tube is sleeved with a fire-resistant layer.
Further, the loose tube is made of polybutylene terephthalate or modified polypropylene material, and the fire-resistant layer is made of low-expansion ceramic polyolefin material.
Furthermore, the sheath layer adopts a double-layer sheath structure, the inner layer is made of high-density polyethylene (HDPE) or modified polypropylene (MPP) material, and the outer layer is made of flame-retardant polyurethane material.
The beneficial effects of the invention are as follows:
according to the invention, the plurality of tensile elements are uniformly arranged in the composite fiber tape layer to serve as the jogged pieces, so that the tensile strength of the optical cable is remarkably improved, and the optical cable is not easily damaged by external force in the laying and using processes. On the basis, a water-blocking rope is arranged between every two adjacent tensile elements, so that the tensile elements and the water-blocking ropes are uniformly distributed, the stability of the whole structure of the optical cable is improved, and the reduction of mechanical properties caused by loose structure is reduced. When the water-blocking rope absorbs water and expands, the open end of the arc-shaped cavity can be effectively extruded, the space between two adjacent embedded grooves provides space for expansion of the arc-shaped cavity, and after the water-blocking rope absorbs water and expands, moisture can be prevented from entering the optical cable, so that the waterproof performance of the optical cable is ensured.
The embedded groove and the outer sheath material made of the flame-retardant polyurethane material are adopted in the invention, so that the optical cable has good flame retardant property, the fire hazard is reduced, and the use safety is improved. The embedded groove is fixed on the outer side of the first fiber woven layer through an adhesive, so that the integral mechanical property and long-term reliability of the composite layer are ensured. The high-density polyethylene (HDPE) or modified polypropylene (MPP) is adopted as an inner sheath material, so that the high-density polyethylene (MPP) has good ultraviolet resistance, weather resistance and chemical corrosion resistance, and can adapt to various severe environmental conditions. On the basis, the nonmetal reinforcing member is made of glass fiber reinforced plastic or polyimide material, and has the characteristics of high strength and light weight, so that the weight of the optical cable is reduced while the high strength is maintained, and the optical cable is convenient to lay and transport.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a nonmetallic layer-twisted optical cable in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a nonmetallic layer-twisted optical cable in an embodiment of the present invention;
FIG. 3 is a schematic structural view of a composite fiber tape layer according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic illustration of twisting of a chimera outside a first fiber braid in an embodiment of the present invention;
Reference numerals: 10. a non-metallic reinforcement; 20. an optical communication unit; 21. a loose tube; 22. an optical fiber; 30. a composite fiber tape layer; 31. a first woven layer of fibers; 32. a second fibrous braid; 33. a chimeric body; 331. a fitting groove; 332. a fitting member; 332a, a tensile element; 332b, a water blocking rope; 40. a sheath layer; 41. an inner layer; 42. an outer layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The nonmetallic layer twisted optical cable as shown in fig. 1 to 5, which comprises a nonmetallic reinforcing part 10 arranged at the center of the optical cable, and an optical communication unit 20, a composite fiber wrapping layer 30 and a sheath layer 40 which are sequentially arranged outside the nonmetallic reinforcing part 10 from inside to outside, wherein a plurality of optical communication units 20 are arranged, and a plurality of optical communication units 20 are stranded at the periphery of the nonmetallic reinforcing part 10 in an annular equidistant manner:
the composite fiber tape layer 30 includes a first fiber braid 31 and a second fiber braid 32, and a plurality of chimeras 33 uniformly distributed between the first fiber braid 31 and the second fiber braid 32 in a twisted manner; each of the embedded bodies 33 includes an embedded groove 331 with an opening at one end, and an embedded piece 332 disposed in the embedded groove 331, wherein the closed end of the embedded groove 331 is attached to the first fiber woven layer 31 and fixed by an adhesive, the opening end of the embedded groove 331 faces the second fiber woven layer 32, and the end of the embedded piece 332 away from the embedded groove 331 is abutted to the second fiber woven layer 32. The design of the composite fiber tape layer 30 of the present invention provides additional protection, in combination with structural reinforcement of the chimera 33, significantly improves the durability and long-term stability of the cable, and is suitable for long-term use in a variety of complex environments.
As shown in fig. 3 to 5, the tensile strength of the optical cable is remarkably improved by uniformly arranging the plurality of tensile elements 332a as the embedded pieces 332 in the composite fiber tape layer 30, so that the optical cable is not easily damaged by external force in the laying and using processes. On the basis, one water-blocking rope 332b is arranged between every two adjacent tensile elements 332a, so that the tensile elements 332a and the water-blocking ropes 332b are uniformly distributed, the overall structural stability of the optical cable is improved, and the mechanical performance reduction caused by loose structure is reduced. When the water-blocking rope 332b absorbs water and expands, the open end of the arc-shaped cavity can be effectively extruded, the space between the two adjacent embedded grooves 331 provides space for expansion of the arc-shaped cavity, moisture can be prevented from entering the inside of the optical cable, and the waterproof performance of the optical cable is ensured.
The present application greatly simplifies the overall structure of the optical cable by using the composite fiber tape layer 30, by the design of the first fiber braid layer 31, the second fiber braid layer 32 and the jogged body 33, reduces the complexity of the optical cable preparation, simplifies the problems of positioning and fixing components in the manufacturing process by using the adhesive and the mechanical low pressure method, does not affect the water absorption expansion of the water blocking rope 332b, compared with the problem that precise equipment and process are required to ensure accurate positioning and fixing of the holes of the reinforcing member or the reinforcing member in the non-metal tape, the adhesive fixing of the fitting groove 331 of the present application is not limited to the fixing of the bottom portion facing the arc-shaped cavity, as long as the opening side is ensured to face the second fiber braid 32, and the performance and consistency of the product can be ensured by precise design and manufacture despite the inclusion of the relatively complex fitting body 33 in the structure, thereby providing a high-performance non-metal twisted fiber cable.
As shown in fig. 4, the fitting groove 331 is a cavity with an arc-shaped cross section, and the arc-shaped design enables the fitting piece 332 to better adapt to external impact and bending stress, effectively disperse stress, reduce stress concentration, and improve impact resistance and flexibility of the optical cable. The bottom of the embedded groove 331 is attached to the first fiber woven layer 31 and fixed by an adhesive, and the embedded groove 331 is fixed by the adhesive, so that the manufacturing process flow of the optical cable is simplified, the requirement of high-precision equipment is reduced, and the production efficiency is improved. The adhesive material should have good adhesion and environmental resistance properties such as epoxy or polyurethane. The linear distance between the bottom of the fitting groove 331 and the opening end is greater than the radius of the fitting piece 332. The two sides of the opening end of the jogging groove 331 and the axis of the jogging groove 331 have an included angle smaller than 180 degrees, the jogging piece 332 jogged and arranged in the cavity is wrapped, and the jogging piece is prevented from shifting from the opening end during installation.
As shown in fig. 3 and 5, the embedded component 332 includes a tensile element 332a and a water blocking rope 332b, where the tensile element 332a and the water blocking rope 332b are disposed in a plurality of embedded grooves 331 at intervals, and the tensile element 332a and the water blocking rope 332b disposed in the middle of the present invention ensure that the embedded component 332 is uniformly distributed, and by designing the arc-shaped embedded groove 331, impact and bending stress of external force are effectively dispersed, so as to improve impact resistance and flexibility of the optical cable. The tensile member 332a provides significant tensile strength such that the cable has higher mechanical strength when subjected to tensile stress, ensuring stability and durability of the cable. The water blocking rope 332b can effectively prevent water from penetrating along the optical cable, improve the water blocking performance of the optical cable, ensure the reliability in a humid or underwater environment, and prevent the optical fiber 22 from being affected by moisture to affect the signal transmission quality. The diameters of the tension element 332a and the water blocking cord 332b are the same as the inner diameter of the fitting groove 331. The side of the fitting piece 332 near the fitting groove 331 is completely enclosed in the fitting groove 331, i.e. is fitted with the arc-shaped cavity formed by the fitting groove, so as to ensure the tight fixation of the fitting piece 332 in the fitting groove 331, prevent loosening or displacement, and improve the overall structural stability of the optical cable.
In order to improve the flame-retardant effect of the optical cable, the embedded groove 331 is made of flame-retardant polyurethane material, so that higher safety can be provided in high-temperature environments such as fire, the risk of flame spread is reduced, the flame-retardant performance of the optical cable is enhanced, and the application safety in special environments is improved. When the water-blocking rope 332b swells by absorbing water, the opening end of the arc-shaped cavity expands in a direction away from the axis of the arc-shaped cavity. Namely, the optical fiber 22 is close to the embedded groove 331 where the nearest tensile member is located, so that the path of moisture penetration can be rapidly filled and blocked, a self-sealing effect is formed, the water blocking effect of the optical cable is improved, and the optical fiber 22 is ensured not to be influenced by the humid environment.
Further, the interval between two adjacent fitting grooves 331 is equal to the width of one fitting groove 331. The fitting pieces 332 are prevented from being too concentrated or dispersed, and the water blocking string 332b of each fitting groove 331 is ensured to effectively block the surrounding moisture permeation path when swelling by water absorption. The uniform spacing design enables the water-blocking cords 332b to quickly form a continuous water-blocking barrier when inflated, improving the water-blocking performance of the cable.
The first fiber braid 31 is positioned against the outside of the optical communication unit 20 to provide primary mechanical protection and structural support. Generally, a high-strength fiber material is adopted, the first fiber braid 31 is woven by glass fiber yarns, the tensile element 332a is made of high-modulus polyester fibers, and the diameter ratio of the high-modulus polyester fibers to the glass fiber yarns is 2-3:1. Has good tensile and impact resistance. The second fibrous braid 32 is disposed on the outermost layer of the composite fibrous tape layer 30, providing additional mechanical protection and durability. The material is also high strength fibers, preferably glass fibers identical to the first fiber weave layer 31, to enhance overall structural strength. The first and second fiber braid 31 and 32 of the present invention increase the tensile strength and durability of the overall structure by high-density braiding. Under the condition of economic permission, the effect is better by weaving with high-strength materials such as aramid fiber and the like. The adhesive-coated composite fiber tape layer 30 is subjected to a curing process so that the adhesive is sufficiently cured and firmly bonded to the first fiber braid 31 and the fitting groove 331.
In the present application, the non-metallic reinforcement 10 is made of glass fiber reinforced plastic or polyimide material. The glass fiber reinforced plastic has the characteristics of high strength and high modulus, can obviously improve the tensile property and the overall mechanical strength of the optical cable, and ensures that the optical cable can bear larger tensile force and stress in the installation and use processes. The polyimide material has excellent mechanical properties and high temperature resistance, can provide good tensile strength and mechanical stability, and is particularly suitable for high-temperature environments and application scenes requiring high strength. The use of the above materials as the nonmetallic reinforcing parts 10 significantly improves the mechanical strength, environmental resistance, flexibility and durability of the optical cable, simultaneously reduces the weight of the optical cable, enhances the production and maintenance efficiency, and further improves the overall performance and market competitiveness of the optical cable.
As shown in fig. 1 or 2, the optical communication unit 20 includes a loose tube 21, a plurality of optical fibers 22 are arranged inside the loose tube 21, the optical fibers 22 are protected and buffered by the loose tube 21, and a water-blocking coating is coated on the surfaces of the optical fibers 22; can effectively prevent moisture infiltration inside optic fibre 22, prevent the influence of moisture to optic fibre 22 performance, loose tube 21's outside cover is equipped with the flame retardant coating. The design of the fire-resistant layer can provide additional protection in high-temperature environments such as fire, delay damage of fire to the optical cable, ensure the continuity and reliability of optical fiber 22 communication in emergency, and improve the safety performance of the optical cable. The loose tube 21 is made of polybutylene terephthalate or modified polypropylene material, has excellent mechanical strength and flexibility, can provide good buffer protection when the optical cable is bent and stretched, reduces mechanical damage to the optical fiber 22, and prolongs the service life of the optical fiber 22. The fire-resistant layer is made of low-expansion ceramic polyolefin material. Can expand and form a hard porcelain layer in a high-temperature environment, delay the damage of fire to the optical cable, ensure the persistence of the communication of the optical fiber 22 in emergency situations such as fire and the like, and improve the safety performance of the optical cable.
As shown in fig. 2, the sheath layer 40 is a double-layer sheath structure, the inner layer 41 is made of high-density polyethylene (HDPE) or modified polypropylene (MPP) material, and the outer layer 42 is made of flame-retardant polyurethane material. The mechanical protection performance of the optical cable is obviously enhanced. The HDPE or MPP material of inner layer 41 provides a strong base protective layer against external mechanical shock and abrasion, preventing physical damage to the cable. The flame retardant polyurethane material of outer layer 42 effectively enhances the flame retardant properties of the cable. Under high temperature environment such as fire disaster, the fire spreading can be delayed to the flame retardant coating, and the integrality and the persistence of optical fiber 22 communication line are protected, provide higher safety guarantee. The two are used cooperatively, so that the stability and the reliability of the optical cable in various complex environments are ensured.
The embedded groove 331 and the outer layer 42 made of the flame-retardant polyurethane material are adopted in the invention, so that the optical cable has good flame retardant property, the fire hazard is reduced, and the use safety is improved. The fitting groove 331 is fixed to the outside of the first fiber woven layer 31 by an adhesive, ensuring the overall mechanical properties and long-term reliability of the composite layer. The high-density polyethylene (HDPE) or modified polypropylene (MPP) is adopted as an inner sheath material, so that the high-density polyethylene (MPP) has good ultraviolet resistance, weather resistance and chemical corrosion resistance, and can adapt to various severe environmental conditions. On the basis, the nonmetal reinforcing member 10 is made of glass fiber reinforced plastic or polyimide material, has the characteristics of high strength and light weight, reduces the weight of the optical cable while keeping the high strength, and is convenient to lay and transport.
On the basis, the invention also provides a preparation method of the nonmetallic layer stranded optical cable, which comprises the following operation steps:
S01: placing the nonmetal reinforcing member 10 at the center of the plurality of optical communication units 20, uniformly twisting the plurality of optical communication units 20 arranged in an annular shape at equal intervals at the periphery of the nonmetal reinforcing member 10;
S02: braiding a first fiber braid 31 outside the cable core formed in step S01 with glass fiber yarns;
s03: a hollow pipe body is manufactured by adopting flame-retardant polyurethane material extrusion, one side of the hollow pipe body is cut along the direction parallel to the axis of the hollow pipe body, so that the included angle between the two ends of the formed arc-shaped cavity and the axis is smaller than 180 degrees, and an embedded groove 331 with an arc-shaped cross section is manufactured;
S04: twisting the bottom of the embedded grooves 331 towards the first fiber woven layer 31, the open end of the embedded grooves faces outwards and along the outer side of the first fiber woven layer 31, wherein the two embedded grooves 331 are separated by one embedded groove 331, and the bottom of the embedded groove 331 is fixed on the first fiber woven layer 31 through an adhesive;
S05: the tension elements 332a and the water-blocking ropes 332b, which are respectively the same as the inner diameters of the embedding grooves 331, are placed in the plurality of embedding grooves 331 at intervals, so that the closed ends of the embedding grooves 331 are attached to the first fiber woven layer 31, and the open ends face the second fiber woven layer 32; according to the invention, the water-blocking ropes 332b are arranged between two adjacent tensile elements 332a, so that the tensile elements 332a and the water-blocking ropes 332b are uniformly distributed, when the water-blocking ropes 332b absorb water and expand, the open ends of the embedded grooves 331 can be effectively extruded, the space between the two adjacent embedded grooves 331 provides a space for expansion of the arc-shaped cavity, namely, the space between the two adjacent embedded grooves 331 provides a space for water absorption expansion of the water-blocking ropes 332 b. The water can be prevented from entering the inside of the optical cable, and the waterproof performance of the optical cable is ensured.
S06: the second fiber woven layer 32 is woven outside the jogger 33 formed by the jogger 331 and the jogger 332, at this time, since the jogger 331 is not fully covered by the jogger 332, one end of the jogger 332 away from the bottom of the jogger 331 protrudes, and is contacted with the second fiber woven layer 32 after the second fiber woven layer 32 is woven; the application simplifies the assembly positioning and fixing problems in the manufacturing process by the design of the first fiber braiding layer 31, the second fiber braiding layer 32 and the jogging body 33, does not influence the water absorption expansion of the water blocking rope 332b, and compared with the problem that precise equipment and process are required to ensure the accurate positioning and fixing of the adding piece or the reinforcing piece hole in the non-metal belt, the bonding and fixing of the jogging groove 331 of the application is not limited by the right bottom of the arc-shaped cavity, as long as the opening side is ensured to face the second fiber braiding layer 32;
S07: an inner sheath made of high-density polyethylene or modified polypropylene material is coated outside the composite fiber tape layer 30, then an outer sheath made of flame-retardant polyurethane material is coated outside the inner sheath, so as to obtain the nonmetallic layer-twisted optical cable, and a person skilled in the art can choose to squeeze and pack outside the composite fiber tape layer 30 according to actual practice so as to obtain the inner sheath layer and the outer sheath layer.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. Nonmetallic layer stranded optical cable, characterized by comprising: a nonmetallic reinforcing part arranged at the center of the optical cable; a plurality of optical communication units which are arranged at equal intervals in a ring shape and are arranged at the periphery of the nonmetal reinforcing piece in a twisting mode; and the composite fiber wrapping layer and the sheath layer are sequentially arranged outside the optical communication unit from inside to outside;
The composite fiber wrapping band layer comprises a first fiber woven layer, a second fiber woven layer and a plurality of joggles uniformly distributed between the first fiber woven layer and the second fiber woven layer in a stranding manner; the embedded body comprises an embedded groove with one end open and embedded pieces arranged in the embedded grooves, wherein the closed ends of the embedded grooves are attached to the first fiber woven layer and fixed through an adhesive, the open ends of the embedded grooves face the second fiber woven layer, and one ends of the embedded pieces, which are far away from the embedded grooves, are abutted against the second fiber woven layer;
The bottom of the embedded groove is attached to the first fiber woven layer and fixed through an adhesive, and the linear distance between the bottom of the embedded groove and the opening end is larger than the radius of the embedded piece;
The embedded piece comprises a tensile element and a water-blocking rope, the tensile element and the water-blocking rope are arranged in the embedded grooves at intervals, and the diameters of the tensile element and the water-blocking rope are the same as the inner diameter of the embedded grooves.
2. The nonmetallic layer-twisted type optical cable according to claim 1, wherein the fitting groove is made of flame-retardant polyurethane material, and an opening end of the fitting groove expands in a direction away from an axis of the fitting groove when the water-blocking rope swells by absorbing water.
3. The nonmetallic layer-twisted optical cable according to claim 2, wherein a space between adjacent two of the fitting grooves is equal to a width of one fitting groove.
4. A nonmetallic layer-twisted optical cable according to claim 2 or 3, wherein the first fiber braid is woven from glass fiber yarns, the tensile element is a high modulus polyester fiber, and the diameter ratio of the high modulus polyester fiber to the glass fiber yarns is 2-3:1.
5. A nonmetallic layer-twisted optical cable according to any one of claims 1 to 3, wherein the nonmetallic reinforcing parts are made of glass fiber reinforced plastics or polyimide materials.
6. A nonmetallic layer-twisted optical cable according to any one of claims 1 to 3, wherein the optical communication unit includes a loose tube, an optical fiber is arranged inside the loose tube, and a water-blocking coating is coated on the surface of the optical fiber; and a fire-resistant layer is sleeved outside the loose tube.
7. The nonmetallic layer-twisted optical cable according to claim 6, wherein the loose tube is made of polybutylene terephthalate or modified polypropylene material, and the flame-retardant layer is made of a low-expansion porcelain polyolefin material.
8. A nonmetallic layer stranded optical cable according to any one of claims 1 to 3, characterized in that the sheath layer adopts a double-layer sheath structure, the inner layer is made of high-density polyethylene or modified polypropylene material, and the outer layer is made of flame-retardant polyurethane material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410981637.7A CN118502052B (en) | 2024-07-22 | 2024-07-22 | Nonmetallic layer stranded optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410981637.7A CN118502052B (en) | 2024-07-22 | 2024-07-22 | Nonmetallic layer stranded optical cable |
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| CN118502052B true CN118502052B (en) | 2024-09-17 |
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| CN103278897A (en) * | 2013-05-20 | 2013-09-04 | 江苏南方通信科技有限公司 | Novel high temperature optical cable |
| CN104777569A (en) * | 2015-04-08 | 2015-07-15 | 江苏中天科技股份有限公司 | Non-metal armoring enhancement type self-supporting optical fiber cable |
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| JP2006258889A (en) * | 2005-03-15 | 2006-09-28 | Furukawa Electric Co Ltd:The | Optical fiber cable |
| JP2008191374A (en) * | 2007-02-05 | 2008-08-21 | Swcc Showa Cable Systems Co Ltd | Fiber optic cable |
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| CN203324533U (en) * | 2013-05-20 | 2013-12-04 | 江苏南方通信科技有限公司 | Novel high temperature optical cable |
| CN105511036B (en) * | 2014-06-26 | 2018-08-31 | 深圳市特发信息股份有限公司 | A kind of non-metallic layer stranded cables |
| ES2822550T3 (en) * | 2015-05-28 | 2021-05-04 | Prysmian Spa | Optical cable for terrestrial networks |
| CN105301727A (en) * | 2015-09-23 | 2016-02-03 | 沈群华 | Anti-rat central loose tube type optical cable and manufacturing method thereof |
| CN207925157U (en) * | 2018-01-17 | 2018-09-28 | 青岛新祥电缆有限公司 | A kind of anti-aging cable |
| CN113671642B (en) * | 2020-05-13 | 2023-06-23 | 广东一普实业有限公司 | Anti-bending optical fiber power hybrid cable |
| CN215375895U (en) * | 2021-08-09 | 2021-12-31 | 江苏泓博通讯科技有限公司 | Threaded optical cable reinforcing core |
| CN113808787B (en) * | 2021-08-30 | 2024-06-28 | 河北津川线缆有限公司 | High single-core overhead insulated cable |
| CN114280743B (en) * | 2021-12-07 | 2023-04-11 | 杭州富通通信技术股份有限公司 | Mining optical cable |
| CN218412983U (en) * | 2022-06-28 | 2023-01-31 | 江苏万华通信科技有限公司 | Resistance to compression layer-stranding cable |
| CN115480352B (en) * | 2022-10-18 | 2023-08-11 | 江苏中天科技股份有限公司 | Self-supporting optical cable |
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| CN103278897A (en) * | 2013-05-20 | 2013-09-04 | 江苏南方通信科技有限公司 | Novel high temperature optical cable |
| CN104777569A (en) * | 2015-04-08 | 2015-07-15 | 江苏中天科技股份有限公司 | Non-metal armoring enhancement type self-supporting optical fiber cable |
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