CN113921176A - Bending-resistant UTP cable - Google Patents
Bending-resistant UTP cable Download PDFInfo
- Publication number
- CN113921176A CN113921176A CN202111176818.5A CN202111176818A CN113921176A CN 113921176 A CN113921176 A CN 113921176A CN 202111176818 A CN202111176818 A CN 202111176818A CN 113921176 A CN113921176 A CN 113921176A
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- China
- Prior art keywords
- cable core
- resistant
- cable
- bending
- bend
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1865—Sheaths comprising braided non-metallic layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/24—Devices affording localised protection against mechanical force or pressure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
The invention discloses a bending-resistant UTP cable which comprises a cable core, a fireproof layer, a weaving layer and an outer protection layer which are sequentially arranged from inside to outside, wherein the cable core comprises a cable core supporting piece and a plurality of insulated wire pairs arranged in the cable core supporting piece, each insulated wire pair is formed by twisting two insulated wires, and each insulated wire comprises a conductor and an insulating layer coated outside the conductor; the cable core supporting piece is provided with a plurality of placing holes allowing the insulation wire pairs to pass through along the axial direction, and each placing hole is internally provided with one insulation wire pair; the cable core support piece comprises a plurality of disc-shaped supports arranged along the axial direction, connecting supports are arranged between every two adjacent disc-shaped supports, and the adjacent connecting supports are arranged in a staggered mode. The invention is provided with a bending-resistant cable core supporting piece, the disc-shaped support of the cable core supporting piece is used for supporting the cable core, the disc-shaped support is connected with the connecting support which is arranged in a staggered mode, bending in multiple directions is allowed, and the bending resistance is realized while the insulating wire pair arranged in the cable core supporting piece is protected.
Description
Technical Field
The invention relates to a cable, in particular to a bending-resistant UTP cable.
Background
Twisted pairs can be classified into Unshielded Twisted Pair (UTP) and Shielded Twisted Pair (STP). The unshielded twisted pair does not have a metal shielding material, only has a layer of insulating rubber to wrap, and has the advantages of relatively low price, flexible networking and easier installation. When the shielded twisted pair is installed, the shielding layers of the twisted pair must be grounded, and in actual construction, the shielding layers are difficult to be completely grounded, so that the shielding layers are the largest interference sources, and the performance of the shielded twisted pair is even far inferior to that of an unshielded twisted pair. Therefore, it is common to employ only unshielded twisted pair wiring in an integrated wiring system unless specifically required. The UTP cable is composed of a plurality of pairs of transmission lines with different colors, does not contain metal shielding materials, is wrapped by only one layer of insulating rubber, is widely used for Ethernet, and has the advantages of good flame retardant effect and difficulty in causing fire.
With the rapid development of network applications in recent years, UTP cables are more and more widely used, the application occasions of the UTP cables are more and more complex, and the requirements on the UTP cables are higher and higher. For the occasions with complex installation environment and limited installation space, the common UTP cable can not meet the requirements of bending resistance and torsion resistance, and has the defects of poor bending resistance and short service life. Therefore, there is a need to design a bend-resistant UTP cable.
Disclosure of Invention
The invention aims to provide a bending-resistant UTP cable which has the advantages of bending resistance, stable structure and light weight, thereby overcoming the defects of poor bending resistance and short service life of the conventional UTP cable.
The technical scheme adopted by the invention for solving the technical problems is to provide a bending-resistant UTP cable, which comprises a cable core, a fireproof layer, a woven layer and an outer protective layer which are sequentially arranged from inside to outside, wherein the cable core comprises a cable core supporting part and a plurality of insulated wire pairs arranged in the cable core supporting part, each insulated wire pair is formed by twisting two insulated wires, and each insulated wire comprises a conductor and an insulating layer coated outside the conductor; the cable core supporting piece is provided with a plurality of placing holes allowing the insulation wire pairs to pass through along the axial direction, and each placing hole is internally provided with one insulation wire pair; the cable core support piece comprises a plurality of disc-shaped supports arranged along the axial direction, adjacent disc-shaped supports are connected through radially arranged connecting supports, and adjacent connecting supports are arranged in a staggered mode.
Furthermore, a central hole is formed in the center of the cable core supporting piece along the axial direction, and a plurality of placing holes are uniformly formed around the central hole; a flexible supporting wire is arranged in the central hole; the flexible supporting line is made of rubber.
Further, elastic insulating fillers are filled between the disc-shaped supports, and elastic insulating fillers are filled between the insulated wire pairs and the connecting supports.
Further, the weaving layer is formed by weaving a group of weaving lines which are arranged clockwise and a group of weaving lines which are arranged anticlockwise.
Further, the braided wire comprises the following components in percentage by weight:
furthermore, the fire-proof layer is formed by wrapping a flame-retardant belt, protruding micro-hooks are formed on the outer surface of the flame-retardant belt, and the micro-hooks extend into meshes of the polypropylene mesh belt to form a three-dimensional mesh cross-linked structure.
Further, the flame retardant tape is a double-sided synthetic mica tape, a calcined mica tape or a low-smoke halogen-free high-flame retardant tape.
Furthermore, the conductor is formed by stranding a plurality of copper monofilaments, and the insulating layer is a polyvinyl chloride insulating layer or a polyethylene insulating layer.
Further, the outer protective layer is a low-smoke halogen-free flame-retardant polyolefin outer sheath coated with an antibacterial coating.
Compared with the prior art, the invention has the following beneficial effects: the bending-resistant UTP cable is provided with the bending-resistant cable core supporting piece, the disc-shaped support of the cable core supporting piece is used for supporting the cable core, is connected with the disc-shaped support and is staggered with the disc-shaped support, so that bending in multiple directions is allowed, and the bending resistance and the good protection on the insulating wire pair arranged in the bending-resistant UTP cable are realized; providing a braid resistant to twisting, the braid being braided from a set of clockwise and counterclockwise braided wires to prevent radial movement of the clockwise and counterclockwise braided wires relative to each other; this results in torsional rigidity and improved torsional resistance.
Drawings
Fig. 1 is a schematic structural view of a bend-resistant UTP cable according to an embodiment of the present invention;
figure 2 is a cross-sectional view of a cable core support in accordance with an embodiment of the present invention;
figure 3 is an elevation view of a cable core support member according to an embodiment of the present invention;
fig. 4 is a schematic diagram of weaving of the woven layer according to the embodiment of the present invention.
In the figure:
1. a flexible support wire; 2. a conductor; 3. an insulating layer; 4. an elastic insulating filler; 5. a cable core support member; 6. a fire barrier layer; 7. weaving layer; 8. an outer protective layer; 51. placing holes; 52. a disk-shaped support; 53. connecting and supporting; 54. a central bore; 71. weaving wires clockwise; 72. and weaving the thread anticlockwise.
Detailed Description
The invention is further described below with reference to the figures and examples.
Fig. 1 is a schematic structural view of a bend-resistant UTP cable according to an embodiment of the present invention; figure 2 is a cross-sectional view of a cable core support in accordance with an embodiment of the present invention; figure 3 is a front view of a cable core support member according to an embodiment of the present invention.
Referring to fig. 1 to 3, the bending-resistant UTP cable according to the embodiment of the present invention includes a cable core, a fireproof layer 6, a braid layer 7, and an outer protective layer 8, which are sequentially disposed from inside to outside, where the cable core includes a cable core support 5 and a plurality of insulation wire pairs disposed in the cable core support 5, each insulation wire pair is formed by twisting two insulation wires, and each insulation wire includes a conductor 2 and an insulation layer 3 coated outside the conductor 2; the cable core support 5 is provided with a plurality of placing holes 51 allowing the insulation line pairs to pass through in the axial direction, one insulation line pair being provided in each placing hole 51; the cable core support member 5 comprises a plurality of disc-shaped supports 52 arranged along the axial direction, adjacent disc-shaped supports 52 are connected through connecting supports 53 arranged along the radial direction, and adjacent connecting supports 53 are arranged in a staggered mode. The disk-shaped supports 52 of the cable core support 5 are used for supporting the cable core, and the connecting supports 53 connected with the disk-shaped supports 52 and arranged in a staggered manner allow bending in multiple directions, and are resistant to bending and well protect the insulated wire pairs arranged in the disk-shaped supports.
Specifically, the center of the cable core support 5 is provided with a central hole 54 along the axial direction, and a plurality of placing holes 51 are uniformly arranged around the central hole 54; the flexible support wire 1 is arranged in the central hole 54; the flexible supporting wire 1 is made of rubber. The flexible supporting wire 1 further improves the supporting performance and simultaneously ensures the bending resistance.
Specifically, the disc-shaped supports 52 are filled with elastic insulating fillers 4 therebetween, and the insulating pairs and the connecting supports 53 are filled with elastic insulating fillers 4 therebetween. The elastic insulating filler 4 supports the insulated wire pair while ensuring good insulating performance of the insulated wire, and good elasticity can ensure bending resistance along with bending of the cable core support 5.
Referring to fig. 4, in the bending-resistant UTP cable according to the embodiment of the present invention, the braided layer 7 is braided by a set of clockwise braided wires and a set of counterclockwise braided wires. Knitting prevents clockwise knit line 71 and counterclockwise knit line 72 from moving radially relative to one another. Torsional stiffness is thereby created, for example, because under torsional action, one set of wires will increase in diameter while the other set of wires will decrease. Braiding allows the two sets of braided wires to resist increasing or decreasing their diameters and thus resist torsional deformation.
Specifically, the braided wire comprises the following components in percentage by weight:
amorphous fiber 6-10%, preferably 8%;
1-3%, preferably 2%;
single crystal fibers 2-8%, preferably 5%;
the polypropylene mesh tape is 80-90%, preferably 85%.
The main component of the polypropylene mesh belt is a polypropylene mesh belt, so that the polypropylene mesh belt has better high temperature resistance and reduced expansion and contraction performance.
The polypropylene has the following characteristics: the heat resistance of the polypropylene is higher than that of the polyethylene, and the melting temperature of the polypropylene is about 40-50% higher than that of the polyethylene and about 160-170 ℃ in normal conditions, so that the cable can not deform at 150 ℃ under the condition of not being subjected to external force; the polypropylene has low density, better mechanical property than polyethylene and outstanding rigidity. Meanwhile, the polypropylene has high tensile strength and good bending resistance, and the bent part does not turn white after being bent for 100 ten thousand times in half.
In addition, the amorphous fiber material has the advantages of high temperature resistance, good thermal stability, low thermal conductivity, small heat capacity, good mechanical vibration resistance, small thermal expansion and good heat insulation. The polycrystalline fiber material has high axial strength and modulus, low density, high specific performance, no creep, high superhigh temperature resistance in non-oxidizing environment, high fatigue resistance, specific heat and electric performance between that of nonmetal and metal, small thermal expansion coefficient, anisotropy, and good electric and heat conducting performance. The single crystal fiber material has the melting point of 2852 ℃, the boiling point of 3600 ℃, the relative density of 3.65g/cm3 and high fire-resistant insulating property.
The polypropylene mesh belt is matched with the amorphous fiber, the polycrystalline fiber and the single crystal fiber in proper proportion, so that the axial strength and the modulus of the braided layer can be improved, the bending resistance, the thermal stability and the fire-resistant insulating property are realized, the effective insulation and support are realized, and the integral tightness and the fire resistance of the cable are improved.
Specifically, the fireproof layer 6 is formed by wrapping a flame-retardant belt, protruding micro hooks are formed on the outer surface of the flame-retardant belt, and the micro hooks extend into meshes of the polypropylene mesh belt to form a three-dimensional mesh cross-linked structure, so that better fixing and sealing effects are achieved. The flame-retardant belt is a double-sided synthetic mica belt, a calcined mica belt or a low-smoke halogen-free high-flame-retardant belt, and has good flame-retardant and fireproof effects.
Preferably, the conductor 2 is formed by stranding a plurality of copper monofilaments, and is softer and bending-resistant compared with a single copper wire; the insulating layer 3 is a polyvinyl chloride insulating layer or a polyethylene insulating layer, and has good insulating property.
Preferably, the outer protection layer 8 is a low smoke zero halogen flame retardant polyolefin outer sheath coated with an antibacterial coating, which is antibacterial, wear resistant and flame retardant.
In summary, in the bending-resistant UTP cable according to the embodiment of the present invention, the bending-resistant cable core support 5 is provided, the disc-shaped support 52 of the cable core support 5 is used to support a cable core, and the disc-shaped support 52 is connected to the connection supports 53 arranged in a staggered manner, so that bending in multiple directions is allowed, and the insulation wire pairs arranged therein are well protected while bending resistance is achieved; providing a braid 7 resistant to twisting, the braid 7 being braided from a set of clockwise and a set of counter-clockwise disposed braided wires, the braiding preventing radial movement of the clockwise and counter-clockwise braided wires relative to each other; thereby, torsional rigidity is generated and the torsional resistance is improved.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A bending-resistant UTP cable is characterized by comprising a cable core, a fireproof layer, a woven layer and an outer protective layer which are sequentially arranged from inside to outside, wherein the cable core comprises a cable core supporting piece and a plurality of insulated wire pairs arranged in the cable core supporting piece, each insulated wire pair is formed by twisting two insulated wires, and each insulated wire comprises a conductor and an insulating layer coated outside the conductor; the cable core supporting piece is provided with a plurality of placing holes allowing the insulation wire pairs to pass through along the axial direction, and each placing hole is internally provided with one insulation wire pair; the cable core support piece comprises a plurality of disc-shaped supports arranged along the axial direction, adjacent disc-shaped supports are connected through radially arranged connecting supports, and adjacent connecting supports are arranged in a staggered mode.
2. The bend-resistant UTP cable of claim 1, wherein the core support has a central bore axially disposed at a center thereof, and a plurality of the placement holes are uniformly disposed around the central bore; a flexible supporting wire is arranged in the central hole; the flexible supporting line is made of rubber.
3. A bend-resistant UTP cable as claimed in claim 1, wherein resilient insulating filler is filled between the disc-like supports, and resilient insulating filler is filled between the pairs of insulated wires and the connecting supports.
4. A bend-resistant UTP cable as in claim 1, wherein the braid is braided from a set of clockwise and a set of counterclockwise braided wires.
5. The bend-resistant UTP cable of claim 4, wherein the braided wire comprises in weight percent:
6. the bend-resistant UTP cable as claimed in claim 5, wherein the fire-resistant layer is formed by wrapping a fire-retardant tape, and the fire-retardant tape has an outer surface formed with protruding micro-hooks, and the micro-hooks extend into meshes of the polypropylene mesh tape to form a three-dimensional mesh cross-linked structure.
7. The bend-resistant UTP cable of claim 6, wherein the flame retardant tape is double-sided synthetic mica tape, calcined mica tape, or low smoke zero halogen high flame retardant tape.
8. The bend-resistant UTP cable of claim 1, wherein the conductor is stranded of a plurality of copper filaments and the insulation is a polyvinyl chloride insulation or a polyethylene insulation.
9. The bend-resistant UTP cable of claim 1, wherein the outer protective layer is a low smoke, zero halogen, flame retardant polyolefin outer jacket coated with an antimicrobial coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021109028163 | 2021-08-06 | ||
| CN202110902816 | 2021-08-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113921176A true CN113921176A (en) | 2022-01-11 |
| CN113921176B CN113921176B (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111176818.5A Active CN113921176B (en) | 2021-08-06 | 2021-10-09 | Bending-resistant UTP cable |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003249129A (en) * | 2001-12-19 | 2003-09-05 | Ube Nitto Kasei Co Ltd | Small diameter coaxial cable and its manufacturing method |
| CN204229913U (en) * | 2014-09-03 | 2015-03-25 | 江苏上上电缆集团有限公司 | The resistance to song of robot disturbs cable |
| CN211045090U (en) * | 2020-01-16 | 2020-07-17 | 深圳市恒利德实业有限公司 | High-strength bending-resistant photoelectric composite cable |
| US20200243219A1 (en) * | 2018-10-09 | 2020-07-30 | Aptiv Electric Systems Co. Ltd. | Twisted pair cable and unshielded cable using the twisted pair cable |
| CN211350173U (en) * | 2020-03-20 | 2020-08-25 | 升辉电线电缆(深圳)有限公司 | Self-supporting isolated twisted-pair cable |
| CN212322679U (en) * | 2020-06-04 | 2021-01-08 | 天津正标津达线缆集团有限公司 | Bending-resistant fireproof cable |
-
2021
- 2021-10-09 CN CN202111176818.5A patent/CN113921176B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003249129A (en) * | 2001-12-19 | 2003-09-05 | Ube Nitto Kasei Co Ltd | Small diameter coaxial cable and its manufacturing method |
| CN204229913U (en) * | 2014-09-03 | 2015-03-25 | 江苏上上电缆集团有限公司 | The resistance to song of robot disturbs cable |
| US20200243219A1 (en) * | 2018-10-09 | 2020-07-30 | Aptiv Electric Systems Co. Ltd. | Twisted pair cable and unshielded cable using the twisted pair cable |
| CN211045090U (en) * | 2020-01-16 | 2020-07-17 | 深圳市恒利德实业有限公司 | High-strength bending-resistant photoelectric composite cable |
| CN211350173U (en) * | 2020-03-20 | 2020-08-25 | 升辉电线电缆(深圳)有限公司 | Self-supporting isolated twisted-pair cable |
| CN212322679U (en) * | 2020-06-04 | 2021-01-08 | 天津正标津达线缆集团有限公司 | Bending-resistant fireproof cable |
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| Publication number | Publication date |
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| CN113921176B (en) | 2023-02-28 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20220111 Assignee: Sichuan Aipu Huadun Electronic Technology Co.,Ltd. Assignor: SHANGHAI AIPU WATON ELECTRONIC TECHNOLOGY (GROUP) CO.,LTD. Contract record no.: X2023980039417 Denomination of invention: A bending resistant UTP cable Granted publication date: 20230228 License type: Common License Record date: 20230811 |
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