CN223308437U - A central tube optical cable - Google Patents
A central tube optical cableInfo
- Publication number
- CN223308437U CN223308437U CN202422746311.4U CN202422746311U CN223308437U CN 223308437 U CN223308437 U CN 223308437U CN 202422746311 U CN202422746311 U CN 202422746311U CN 223308437 U CN223308437 U CN 223308437U
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- reinforcing
- outer sheath
- optical cable
- yarn layer
- loose tube
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Abstract
The application relates to a central tube type optical cable, which belongs to the technical field of communication optical cables and comprises a loose tube, a reinforcing yarn layer, an outer sheath, a reinforcing piece and a reinforcing piece, wherein the reinforcing yarn layer is coated on the outer edge of the loose tube, the outer sheath is coated on the outer edge of the reinforcing yarn layer, the reinforcing piece is partially embedded in the outer sheath at any section and partially exposed out of the outer sheath, and the part of the reinforcing piece exposed out of the outer sheath is contacted with the reinforcing yarn layer so as to press the reinforcing yarn layer on the loose tube. Therefore, the reinforcing piece can generate extrusion force on the reinforcing yarn layer and the loose tube, inhibit the relative displacement of the loose tube in the outer sheath, increase the drawing force value of the outer sheath, improve the stability of the whole structure of the optical cable, inhibit the longitudinal shrinkage of the optical cable and improve the high-low temperature performance of the optical cable. Compared with the optical cable with the reinforcing part completely embedded in the outer sheath, the structure of the reinforcing part partially embedded in the outer sheath can reduce the wall thickness of the optical cable, so that the overall size of the optical cable is reduced, the consumption of reinforcing yarns is reduced, and the manufacturing cost of the optical cable is reduced.
Description
Technical Field
The application relates to the technical field of communication optical cables, in particular to a central tube type optical cable.
Background
The non-layer stranded optical cable using a single loose tube as a subunit is called a central tube type access optical cable applied to an access network, and common installation modes are overhead and pipelines. For overhead applications, wiring is typically attached to a pole, with short-range access and long-link overhead.
A common central tube access cable has two or more strength members embedded in parallel in a jacket. The structure enhances the tensile property of the optical cable through the rigid bearing element, inhibits the longitudinal shrinkage of the optical cable, but simultaneously limits the bending direction of the optical cable, reduces the flexibility of the optical cable, and causes the reinforcing member to be broken due to improper artificial bending of the optical cable in the construction process, thereby reducing the tensile property of the optical cable.
Disclosure of Invention
Aiming at one of the defects or shortcomings of the background technology, the embodiment of the application provides a central tube type optical cable, which can keep good tensile property and low shrinkage property, improve the flexibility of the optical cable and enhance the drawing force value of an optical cable sheath.
The embodiment of the application provides a central tube type optical cable, which comprises the following components:
a loose tube;
the reinforcing yarn layer is coated on the outer edge of the loose tube;
an outer sheath which is coated on the outer edge of the reinforced yarn layer;
And the reinforcing piece is partially embedded in the outer sheath at any section and partially exposed out of the outer sheath, and the part of the reinforcing piece exposed out of the outer sheath is contacted with the reinforcing yarn layer so as to press the reinforcing yarn layer on the loose tube.
In some embodiments, an optical fiber is arranged in the loose tube, and a water blocking filler is filled between the loose tube and the optical fiber.
In some embodiments, the reinforcing yarn layer is formed by using a plurality of reinforcing yarns, and the reinforcing yarns are glass fiber yarns or aramid fiber yarns.
In some embodiments, the reinforcement is continuously helically wound around the reinforcing yarn layer in the direction of extension of the loose tube.
In some embodiments, the number of the reinforcing members is two, the two reinforcing members are wound on the reinforcing yarn layer along the same spiral direction, and the center connecting line of the two reinforcing members is routed through the center of the loose tube.
In some embodiments, the number of the reinforcing members is a plurality, and the plurality of reinforcing members are wound on the reinforcing yarn layer along the same spiral direction to form an armor layer for protecting the loose tube.
In some embodiments, the outer surface of the stiffener is coated with an adhesive layer for bonding the outer sheath, the adhesive layer being ethylene ethyl acrylate copolymer.
In some embodiments, the ratio of the cross-sectional area of the stiffener embedded in the outer jacket at any cross-section to the total cross-sectional area of the stiffener is greater than or equal to 50%.
In some embodiments, the reinforcement is a fiber-reinforced plastic rod, the tensile strength of the reinforcement is greater than or equal to 1100MPa, and the tensile elastic modulus of the reinforcement is greater than or equal to 50GPa.
In some embodiments, a tear line for peeling the outer sheath is helically wound between the outer sheath and the reinforcing yarn layer.
The technical scheme provided by the application has the beneficial effects that:
The embodiment of the application provides a central tube type optical cable, because a reinforcing yarn layer is coated on the outer edge of a loose tube, an outer sheath is coated on the outer edge of the reinforcing yarn layer, meanwhile, a part of a reinforcing part at any section is embedded in the outer sheath and is partially exposed out of the outer sheath, and the part of the reinforcing part exposed out of the outer sheath is contacted with the reinforcing yarn layer so as to press the reinforcing yarn layer on the loose tube.
Therefore, a part of the reinforcing piece is abutted against the reinforcing yarn layer, corresponding extrusion force is generated on the reinforcing yarn layer and the loose tube, the relative displacement of the loose tube in the outer sheath can be restrained, the drawing force value of the outer sheath is increased, the stability of the whole structure of the optical cable is improved, the longitudinal shrinkage of the optical cable can be restrained, and the high-low temperature performance of the optical cable is improved.
Compared with the optical cable with the reinforcing part completely embedded in the outer sheath, the structure of the reinforcing part partially embedded in the outer sheath can reduce the wall thickness of the optical cable, so that the overall size of the optical cable is reduced, the consumption of reinforcing yarns is reduced, and the manufacturing cost of the optical cable is reduced. In addition, the optical cable can be formed by extruding the sheath once, and has the advantage of convenient production and manufacture.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a center tube cable according to an embodiment of the present application;
FIG. 2 is a schematic illustration of the connection of a reinforcement and a reinforcing yarn layer provided by an embodiment of the present application.
In the drawings, the list of components represented by the various numbers is as follows:
101. Loose tube, 102, reinforced yarn layer, 103, outer sheath, 104, reinforcement, 105, optical fiber, 106, water-blocking filler, 107 and tearing rope.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Aiming at one of the defects or shortcomings of the background technology, the embodiment of the application provides a central tube type optical cable, which can keep good tensile property and low shrinkage property, improve the flexibility of the optical cable and enhance the drawing force value of an optical cable sheath.
Referring to fig. 1 and 2, an embodiment of the present application provides a center tube type optical cable, including:
a loose tube 101;
a reinforcing yarn layer 102 which covers the outer periphery of the loose tube 101;
An outer sheath 103 covering the outer periphery of the reinforcing yarn layer 102;
And a reinforcing member 104 partially embedded in the outer sheath 103 at an arbitrary cross section and partially exposed to the outer sheath 103, wherein a portion of the reinforcing member 104 exposed to the outer sheath 103 is in contact with the reinforcing yarn layer 102 to press the reinforcing yarn layer 102 against the loose tube 101.
The central tube type optical cable comprises a loose tube 101, a reinforcing yarn layer 102, an outer sheath 103 and a reinforcing piece 104, wherein the reinforcing yarn layer 102 is coated on the outer surface of the loose tube 101, the outer sheath 103 is coated on the outer surface of the reinforcing yarn layer 102, the reinforcing piece 104 is partially embedded on the outer sheath 103 at any section and is partially exposed out of the inner wall of the outer sheath 103, and the part of the reinforcing piece 104 exposed out of the outer sheath 103 is abutted against the reinforcing yarn layer 102.
Under the action of the outer sheath 103, the reinforcement 104 can generate corresponding extrusion force on the reinforced yarn layer 102 and the loose tube 101, so that the relative displacement of the loose tube 101 in the outer sheath 103 is restrained, the drawing force value of the outer sheath 103 can be increased, the overall structural stability of the optical cable is improved, the longitudinal shrinkage of the optical cable can be restrained, and the high-low temperature performance of the optical cable is improved.
Compared with the optical cable with the reinforcing member 104 completely embedded in the outer sheath 103, the structure of the reinforcing member 104 partially embedded in the outer sheath 103 can reduce the wall thickness of the optical cable, thereby reducing the overall size of the optical cable, reducing the consumption of reinforcing yarns and reducing the manufacturing cost of the optical cable. In addition, the optical cable can be formed by extruding the sheath once, and has the advantage of convenient production and manufacture.
Illustratively, the optical cable body of the present embodiment includes an outer jacket 103, the outer jacket 103 having a thickness of 1.0mm to 2.0mm. When the environment of application of the cable is outdoor, the jacket material may be selected to be High Density Polyethylene (HDPE). When the application environment has requirements on flame retardant property, the sheath material can be selected from low smoke zero halogen flame retardant polyolefin (LSZH), so that the high temperature extrusion molding is convenient.
The inner side of the reinforcing yarn layer 102 is covered with a loose tube 101. The loose tube 101 has a diameter of 1.2mm to 3.6mm. The loose tube 101 is made of one of polybutylene terephthalate (PBT), polycarbonate (PC), and polyester-based thermoplastic elastomer (TPEE).
Alternatively, the loose tube 101 may be co-extruded as a double layer loose tube from PBT and PC in a 1:2 ratio. Alternatively, the loose tube 101 may be co-extruded from PBT and TPEE to form a double layer loose tube with a 1:2 ratio of PBT to TPEE.
Part of the reinforcement 104 abuts against the reinforcement yarn layer 102, corresponding extrusion forces are generated on the reinforcement yarn layer 102 and the loose tube 101, relative displacement of the loose tube 101 in the outer jacket 103 is restrained, the drawing force value of the jacket is increased, and the overall structural stability of the optical cable is improved. In an embodiment, the cable is subjected to a sheath pulling test according to the specification of annex F of YD/T1258.2-2009, and a force value for pulling a 10cm sheath from the cable core is greater than or equal to 50N.
In some alternative embodiments, referring to fig. 1 and 2, embodiments of the present application provide a center tube cable having optical fibers 105 disposed within a loose tube 101, with a water blocking filler 106 filled between the loose tube 101 and the optical fibers 105.
The inner cavity of the loose tube 101 of the embodiment of the application is provided with an optical fiber 105 and a water-blocking filler 106. The optical fiber 105 is illustratively a bare optical fiber 105 or a colored optical fiber 105. When the number of optical fibers 105 exceeds 12, the optical fibers 105 can be identified by spraying rings on the surface of the optical fibers 105. The water-blocking filler 106 may be a fibrous paste, which is a thixotropic gel. In order to ensure the water blocking effect, the filling degree of the fiber paste in the loose tube 101 is more than or equal to 85%.
In some alternative embodiments, referring to fig. 1 and 2, embodiments of the present application provide a central tube optical cable, where the reinforcing yarn layer 102 of the central tube optical cable is made of multiple strands of reinforcing yarns, and the reinforcing yarns are glass fiber yarns or aramid fiber yarns.
The reinforcing yarn layer 102 of the embodiment of the present application is composed of a plurality of reinforcing yarns uniformly coated on the outer surface of the loose tube 101. The reinforcing yarn is one material of glass fiber yarn and aramid fiber yarn, or the mixture of the two materials, and is spirally wrapped at a certain twisting pitch.
In other embodiments, the plurality of reinforcing yarns may be disposed straight on the outer surface of loose tube 101. In addition, in order to enhance the water blocking performance of the reinforcing yarn layer 102, the gaps formed by the plurality of reinforcing yarns may be filled with water absorbing powder.
In some alternative embodiments, referring to FIGS. 1 and 2, embodiments of the present application provide a center tube cable having strength members 104 continuously helically wound around a layer of reinforcing yarns 102 in the direction of extension of loose tube 101.
The reinforcing piece 104 is arranged between the outer sheath 103 and the reinforcing yarn layer 102, and the reinforcing piece 104 is spirally wrapped on the reinforcing yarn layer 102, so that the optical cable is easy to bend towards any direction, the flexibility of the optical cable is improved, and the optical cable is convenient for constructors to install and operate.
In some alternative embodiments, referring to FIGS. 1 and 2, embodiments of the present application provide a center tube cable having two strength members 104, the two strength members 104 being wrapped around the layer of strength yarns 102 in the same helical direction, and the center of the tube 101 being loosened by the center line of the two strength members 104.
Two reinforcing members 104 are arranged between the outer sheath 103 and the reinforcing yarn layer 102 in the embodiment of the application, and the two reinforcing members 104 are arranged at equal intervals. Specifically, in the present embodiment, the two stiffeners 104 are arranged at an angle of 180 °. The reinforcement 104 is spirally wound in the same direction along the axial center of the outer sheath 103 at a certain twisting pitch. The reinforcement 104 is spirally wrapped inside the optical cable, so that the optical cable is easy to bend in any direction, the flexibility of the optical cable is improved, and the installation operation of constructors is facilitated.
In some alternative embodiments, referring to fig. 1 and 2, embodiments of the present application provide a center tube cable having a plurality of strength members 104, the plurality of strength members 104 being wrapped around the layer of strength yarns 102 in the same helical direction to form an armor layer for protecting the loose tube 101.
The plurality of reinforcing pieces 104 are arranged between the outer sheath 103 and the reinforcing yarn layer 102, and the plurality of reinforcing pieces 104 are spirally wrapped along the axis of the outer sheath 103 in the same direction, so that the loose tube 101 can be completely wrapped, an armor layer is formed, and the optical cable has excellent lateral pressure resistance and certain rodent resistance.
In some alternative embodiments, referring to FIGS. 1 and 2, embodiments of the present application provide a center tube cable having an outer surface of strength member 104 coated with an adhesive layer for bonding outer jacket 103, the adhesive layer being an ethylene ethyl acrylate copolymer.
The outer surface of the reinforcement 104 in the embodiment of the application is coated with the adhesive layer, and the adhesive layer can tightly adhere the outer sheath 103 and the reinforcement 104 together, so that the longitudinal shrinkage of the optical cable can be restrained, and the high-low temperature performance of the optical cable is improved.
Illustratively, the periphery of the stiffener 104 is coated with a low melting point copolymer adhesive, and the stiffener 104 contains a copolymer adhesive with a diameter of 0.58mm or greater. The copolymer viscose is ethylene ethyl acrylate copolymer (EEA). Under the high temperature of the jacket material, the EEA glue melts and the stiffener 104 and the jacket material adhere tightly together through the EEA glue. Under the pressure of the extruder head die, a portion of the reinforcement 104 is embedded in the sheath and another portion abuts the reinforcement yarns.
The reinforcement 104 is partially embedded in the outer sheath 103, so that the longitudinal shrinkage of the cable sheath can be restrained, and the high-low temperature performance of the cable can be improved. Compared with the central tube type optical cable with the reinforcing member 104 completely embedded in the outer sheath 103, the structure of the reinforcing member 104 partially embedded in the outer sheath 103 can reduce the wall thickness of the optical cable, so that the overall size of the optical cable is reduced, the consumption of reinforcing yarns is reduced, and the manufacturing cost of the optical cable is reduced.
In some alternative embodiments, referring to FIGS. 1 and 2, embodiments of the present application provide a center tube cable having strength members 104 embedded in the outer jacket 103 at any cross-section at a ratio of 50% or more of the cross-sectional area of the outer jacket 103 to the total cross-sectional area of the strength members 104.
According to the embodiment of the application, the ratio of the cross section area of the reinforcing member 104 embedded into the outer sheath 103 at any cross section to the total cross section area of the reinforcing member 104 is greater than or equal to 50%, so that the connection strength of the reinforcing member 104 and the outer sheath 103 can be effectively ensured on the premise that the reinforcing member 104 is partially embedded into the outer sheath 103, the longitudinal shrinkage of the optical cable sheath is inhibited, and the high-low temperature performance of the optical cable is improved.
In some alternative embodiments, referring to FIGS. 1 and 2, embodiments of the present application provide a center tube cable in which strength members 104 are fiber-reinforced plastic rods, strength members 104 have a tensile strength of 1100MPa or more, and strength members 104 have a tensile elastic modulus of 50GPa or more.
The reinforcing piece 104 is arranged between the outer sheath 103 and the reinforcing yarn layer 102, and the reinforcing piece 104 is a fiber reinforced plastic rod, has larger tensile strength and tensile elastic modulus, and can ensure the tensile performance of the optical cable and the stability of overhead application.
Illustratively, the stiffener 104 may be one of a glass fiber reinforced plastic rod (GFRP), an aramid fiber reinforced plastic rod (KFRP). The number of the reinforcing members 104 is equal to or greater than two. The tensile strength of the reinforcement 104 is 1100MPa or more and the tensile elastic modulus is 50GPa or more.
In some alternative embodiments, referring to fig. 1 and 2, embodiments of the present application provide a center tube cable having a ripcord 107 helically wound between an outer jacket 103 and a reinforcing yarn layer 102 for stripping the outer jacket 103.
A tear line 107 is provided between the outer sheath 103 and the reinforcing yarn layer 102 of an embodiment of the present application. The ripcord 107 is used to strip the outer jacket 103 on the fiber optic cable. The number of the tear lines 107 is one or two. When two tear lines 107 are placed, the angle between the two tear lines 107 is 120 ° to 180 °. The tear cord 107 is helically wrapped in the same direction along the sheath axis at a certain twisting pitch. The strand pitch of the tear line 107 and the reinforcement 104 is the same, as is the wrapping direction.
In summary, compared with the prior art, the application has the following advantages:
(1) At least 50% of the reinforcing members 104 are embedded in the outer sheath 103 and are tightly adhered to the sheath material through the adhesive layer, so that the longitudinal shrinkage of the optical cable can be restrained, and the high-low temperature performance of the optical cable can be improved. Compared with the optical cable with the reinforcing member 104 completely embedded in the outer sheath 103, the structure of the reinforcing member 104 partially embedded in the outer sheath 103 can reduce the wall thickness of the optical cable, thereby reducing the overall size of the optical cable, reducing the consumption of reinforcing yarns and reducing the manufacturing cost of the optical cable.
(2) The reinforcement 104 is spirally wrapped inside the optical cable, so that the optical cable is easy to bend in any direction, the flexibility of the optical cable is improved, and the installation operation of constructors is facilitated. The use of a plurality of strength members 104 enhances the tensile properties of the cable and the stability of the aerial application. When the number of the reinforcing members 104 is as large as the number of the loose tubes 101 to be completely covered, an armor layer can be formed, so that the optical cable has excellent lateral pressure resistance and a certain rodent resistance.
(3) Part of the reinforcement 104 is abutted against the reinforcement yarn layer 102, and corresponding extrusion forces are generated on the reinforcement yarn layer 102 and the loose tube 101, so that relative displacement of the loose tube 101 in the outer sheath 103 is restrained, the drawing force value of the outer sheath 103 is increased, and the overall structural stability of the optical cable is improved.
(4) The optical cable of this embodiment can be through once sheath extrusion molding, and it is convenient to produce and make.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intervening medium, or may be in communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A center tube cable comprising:
a loose tube (101);
a reinforcing yarn layer (102) which is wrapped around the outer edge of the loose tube (101);
An outer sheath (103) that covers the outer edge of the reinforcing yarn layer (102);
And the reinforcing piece (104) is partially embedded in the outer sheath (103) at any section and partially exposed out of the outer sheath (103), and the part of the reinforcing piece (104) exposed out of the outer sheath (103) is contacted with the reinforcing yarn layer (102) so as to press the reinforcing yarn layer (102) on the loose tube (101).
2. The center tube cable of claim 1, wherein:
An optical fiber (105) is arranged in the loose tube (101), and a water blocking filler (106) is filled between the loose tube (101) and the optical fiber (105).
3. The center tube cable of claim 1, wherein:
The reinforcing yarn layer (102) is formed by a plurality of reinforcing yarns, and the reinforcing yarns are glass fiber yarns or aramid fiber yarns.
4. The center tube cable of claim 1, wherein:
The reinforcement (104) is continuously helically wound around the reinforcement yarn layer (102) in the direction of extension of the loose tube (101).
5. The center tube cable of claim 1, wherein:
The number of the reinforcing pieces (104) is two, the two reinforcing pieces (104) are wound on the reinforcing yarn layer (102) along the same spiral direction, and the center connecting line of the two reinforcing pieces (104) is routed to the center of the loose tube (101).
6. The center tube cable of claim 1, wherein:
The number of the reinforcing pieces (104) is a plurality, and the reinforcing pieces (104) are wound on the reinforcing yarn layer (102) along the same spiral direction to form an armor layer for protecting the loose tube (101).
7. The center tube cable of claim 1, wherein:
The outer surface of the reinforcement (104) is coated with an adhesive layer for bonding the outer sheath (103), and the adhesive layer is ethylene-ethyl acrylate copolymer.
8. The center tube cable of claim 1, wherein:
the ratio of the cross-sectional area of the reinforcing member (104) embedded in the outer sheath (103) at any cross-section to the total cross-sectional area of the reinforcing member (104) is 50% or more.
9. The center tube cable of claim 1, wherein:
The reinforcing piece (104) is a fiber reinforced plastic rod, the tensile strength of the reinforcing piece (104) is more than or equal to 1100MPa, and the tensile elastic modulus of the reinforcing piece (104) is more than or equal to 50GPa.
10. The center tube cable of claim 1, wherein:
A tearing rope (107) for peeling off the outer sheath (103) is spirally wound between the outer sheath (103) and the reinforcing yarn layer (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422746311.4U CN223308437U (en) | 2024-11-11 | 2024-11-11 | A central tube optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422746311.4U CN223308437U (en) | 2024-11-11 | 2024-11-11 | A central tube optical cable |
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| Publication Number | Publication Date |
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| CN223308437U true CN223308437U (en) | 2025-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202422746311.4U Active CN223308437U (en) | 2024-11-11 | 2024-11-11 | A central tube optical cable |
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| CN (1) | CN223308437U (en) |
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