CN114999728A - Signal cable - Google Patents
Signal cable Download PDFInfo
- Publication number
- CN114999728A CN114999728A CN202210622827.0A CN202210622827A CN114999728A CN 114999728 A CN114999728 A CN 114999728A CN 202210622827 A CN202210622827 A CN 202210622827A CN 114999728 A CN114999728 A CN 114999728A
- Authority
- CN
- China
- Prior art keywords
- insulated wire
- wire pair
- shielding layer
- signal cable
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/04—Cables with twisted pairs or quads with pairs or quads mutually positioned to reduce cross-talk
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1016—Screens specially adapted for reducing interference from external sources composed of a longitudinal lapped tape-conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
- H01B11/10—Screens specially adapted for reducing interference from external sources
- H01B11/1033—Screens specially adapted for reducing interference from external sources composed of a wire-braided conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
- H01B3/421—Polyesters
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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
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/228—Metal braid
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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
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Abstract
The invention discloses a signal cable, which comprises a cable core, a shielding layer and an outer coating layer, wherein the shielding layer is coated outside the cable core, the outer coating layer is formed by extruding and coating the shielding layer, the cable core comprises a first insulated wire pair, a second insulated wire pair, a third insulated wire pair and a fourth insulated wire pair, the four insulated wire pairs are all included, each insulated wire pair comprises two insulated wire cores twisted together, each insulated wire core comprises a conductor and a synthetic mica tape wrapped on the conductor, the twisting pitch of the second insulated wire pair is 1.11 times of that of the first insulated wire pair, the twisting pitch of the third insulated wire pair is 1.12 times of that of the second insulated wire pair, and the twisting pitch of the fourth insulated wire pair is 1.12 times of that of the third insulated wire pair.
Description
Technical Field
The invention relates to the technical field of wires and cables, in particular to a signal cable.
Background
A signal cable is a signal transmission means. At present, 4-wire signal cables are widely applied to the fields of networks, signal transmission, automatic control, robots and the like. The signal cables on the market are generally uniformly coated on a single-core copper conductor by high-speed insulating polyethylene, twisted by pair twisting equipment, then coated on a plurality of twisted pairs by insulating polyester belts, and finally sheathed and extruded by polyvinyl chloride (PVC), signals between the twisted pairs can interfere with each other, and the cables need to have high flame retardant property and better fire resistance according to the requirements of fire control laws and governments at all levels in China on fire safety.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-temperature-resistant and fire-resistant signal cable with stable signal transmission.
In order to solve the technical problem, the invention provides a signal cable, which comprises a cable core, a shielding layer coated outside the cable core and an outer coating layer formed by extrusion coating outside the shielding layer, wherein the cable core comprises four insulation wire pairs including a first insulation wire pair, a second insulation wire pair, a third insulation wire pair and a fourth insulation wire pair, each insulation wire pair comprises two insulation wire cores twisted together, each insulation wire core comprises a conductor and a synthetic mica tape wrapped on the conductor, the twisting pitch of the second insulation wire pair is 1.11 times of that of the first insulation wire pair, the twisting pitch of the third insulation wire pair is 1.12 times of that of the second insulation wire pair, and the twisting pitch of the fourth insulation wire pair is 1.12 times of that of the third insulation wire pair.
The further technical scheme is as follows: the shielding layer comprises an aluminum-plastic composite belt shielding layer coated outside the cable core and a copper wire braided shielding layer coated outside the aluminum-plastic composite belt shielding layer.
The further technical scheme is as follows: the first insulated wire pair, the second insulated wire pair, the third insulated wire pair and the fourth insulated wire pair are sequentially arranged and distributed in the shielding layer in a clockwise direction.
The further technical scheme is as follows: and the two insulated wire cores in each insulated wire pair are uniformly twisted.
The further technical scheme is as follows: the synthetic mica tape is formed by bonding mica, a glass fiber tape and a polyester film through polyester resin.
The further technical scheme is as follows: the outer tegument layer is extruded outside the shielding layer by silicon rubber.
The further technical scheme is as follows: the conductor is formed by twisting a plurality of soft copper wires.
Compared with the prior art, the insulating wire core of the cable core in the signal cable consists of the conductor and the synthetic mica tape wrapped on the conductor, the synthetic mica tape is high temperature resistant and fire resistant, so that electric and signal can still keep normal transmission for at least 90-180min even if an outer coating layer of the signal cable is burnt out, in order to prevent mutual interference of signals between the insulating wire pairs, the twisting pitches between the insulating wire pairs are different, the attenuation of the signal of the cable can be reduced through the shielding layer, meanwhile, the electromagnetic interference radiation can be reduced, the sensitivity to external interference can be reduced, and the impedance of the cable can be reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of one embodiment of a signal cable of the present invention.
Fig. 2 is a schematic diagram of a pair of insulated wires in the signal cable of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
Referring to fig. 1-2, fig. 1-2 illustrate one embodiment of a signal cable 100 of the present invention. In the embodiment shown in the drawings, the signal cable 100 includes a cable core, a shielding layer 20 covering the cable core, and a jacket 30 extruded and formed outside the shielding layer 20, the cable core includes four insulated wire pairs including a first insulated wire pair 11, a second insulated wire pair 12, a third insulated wire pair 13, and a fourth insulated wire pair 14, each insulated wire pair includes two insulated wire cores 15 twisted together, each insulated wire core 15 includes a conductor 151 and a synthetic mica tape 152 wrapped around the conductor 151, a twist pitch of the second insulated wire pair is 1.11 times a twist pitch of the first insulated wire pair, a twist pitch of the third insulated wire pair is 1.12 times a twist pitch of the second insulated wire pair, and a twist pitch of the fourth insulated wire pair is 1.12 times a twist pitch of the third insulated wire pair. As shown in fig. 2, the stranding pitch L is the distance that one insulated wire core 15 moves around another insulated wire core 15 for one revolution. Preferably, in the present embodiment, the first insulated wire pair has a twist pitch of 6d, where d is the outer diameter of the insulated wire pair, i.e., d is the sum of the outer diameters of the two insulated wire cores 15, and it is understood that the insulated wire cores 15 may adopt wires having a gauge of 0.5 square, 0.75 square, 1 square, 1.5 square or 2.5 square, which is commonly used in the art. Based on the design, the synthetic mica tape 152 is wrapped on the conductor 151 by adopting a wrapping process, and compared with an insulated wire core manufactured by a longitudinal wrapping process and an extrusion wrapping process, the wrapping process has the advantages that the texture is softer, the requirement of cable flexibility can be met, moreover, the synthetic mica tape 152 is high temperature resistant and fire resistant, so that even if the outer layer 30 of the signal cable 100 is burnt out, the normal transmission of electricity and signals can be kept for 90-180min, and the twist pitches between the respective insulated wire pairs of the first insulated wire pair 11, the second insulated wire pair 12, the third insulated wire pair 13 and the fourth insulated wire pair 14 are different from each other, but are correlated with each other, the mutual interference of signals between the insulated wire pairs can be prevented to the maximum extent, and the attenuation of the cable signals can be reduced by the shielding layer 20, meanwhile, the electromagnetic interference radiation can be reduced, the sensitivity to external interference is reduced, the impedance of the cable is reduced, and the cable has the functions of heat dissipation and grounding.
In some embodiments, the shielding layer 20 includes an aluminum-plastic composite tape shielding layer 21 covering the cable core and a copper wire braided shielding layer 22 covering the aluminum-plastic composite tape shielding layer 21, that is, a layer of aluminum-plastic composite tape is wrapped around the cable core to form the aluminum-plastic composite tape shielding layer 21, and then a soft copper wire is wrapped outside the aluminum-plastic composite tape shielding layer 21 by using a braiding process to form the copper wire braided shielding layer 22.
In the present embodiment, the synthetic mica tape 152 is formed by bonding mica, a glass fiber tape, and a polyester film with a polyester resin. Specifically, the synthetic mica tape 152 is formed by using mica as a base, a glass fiber tape as a reinforcing layer and a polyester film as an insulating layer, and bonding the mica tape, the glass fiber tape and the polyester film together through a high-temperature resistant adhesive such as polyester resin under high pressure, and has the functions of high temperature resistance, fire resistance and insulation, and the fire resistance temperature is as follows: 830 ℃ and 1000 ℃.
In some embodiments, the two insulated wire cores 15 of each insulated wire pair are uniformly twisted, and further, four insulated wire pairs are uniformly twisted together to form a cable core, and specifically, the first insulated wire pair 11, the second insulated wire pair 12, the third insulated wire pair 13 and the fourth insulated wire pair 14 are sequentially twisted in a clockwise arrangement, and the twisting pitch is not greater than 110 mm. Preferably, the cross-sections of the two conductors 151 in the insulated wire pair are maintained consistent to control the electrical resistance imbalance of the two conductors 151 to below 1.5%, thereby controlling the electrical resistance imbalance of the conductors 151 between the insulated wire pair and the insulated wire pair to below 3%. Meanwhile, the working capacitance of the insulated wire pair in the insulated wire is less than or equal to 8nF/100m under the test condition of 1kHz, the capacitance of the insulated wire pair to the ground is unbalanced, and the working capacitance of the insulated wire pair in the test condition of 1kHz is less than or equal to 180nF/100 m.
In this embodiment, the conductor 151 of the insulated wire core 15 is formed by twisting a plurality of soft copper wires, and it is understood that a colored ribbon (line) may be added between the conductor 151 and the synthetic mica tape 152 to identify the color of the insulated wire core 15 when the insulated wire core 15 is manufactured, in this embodiment, the first insulated wire pair 11, the second insulated wire pair 12, the third insulated wire pair 13 and the fourth insulated wire pair 14 are a white/blue wire pair, a white/orange wire pair, a white/green wire pair and a white/brown wire pair, respectively.
In some embodiments, the exterior layer 30 is extruded from silicone rubber over the shielding layer 20. Based on this design, the silicone rubber is soft in texture, flame retardant, and high temperature resistant, protecting the shielding layer 20 and the cable core.
In summary, the insulating wire core of the cable core in the signal cable of the present invention is composed of the conductor and the synthetic mica tape wrapped on the conductor, and the synthetic mica tape is high temperature resistant and fire resistant, so that even if the outer layer of the signal cable is burnt out, the electric and signal can still keep normal transmission within 90-180 minutes, and in order to prevent mutual interference of signals between the insulating wire pairs, the twist pitches between the insulating wire pairs are different, and the twist pitches between the edge wire pairs are correlated with each other, so as to further prevent interference, and the attenuation of the cable signal can be reduced through the shielding layer, and at the same time, the electromagnetic interference radiation and the sensitivity to the external interference can be reduced, and the impedance of the cable can be reduced.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (7)
1. A signal cable, characterized by: the signal cable includes cable core, cladding shielding layer and crowded package outside the cable core form the tegument outside the shielding layer, the cable core includes four insulated wire pairs of first insulated wire pair, second insulated wire pair, third insulated wire pair and fourth insulated wire pair total, and each insulated wire pair includes two transposition insulating core together, each insulated wire core includes the conductor and winds the synthetic mica tape of package on the conductor, just the transposition pitch of second insulated wire pair is 1.11 times of first insulated wire pair transposition pitch, the transposition pitch of third insulated wire pair is 1.12 times of second insulated wire pair transposition pitch, the transposition pitch of fourth insulated wire pair is 1.12 times of third insulated wire pair transposition pitch.
2. The signal cable of claim 1, wherein: the shielding layer comprises an aluminum-plastic composite belt shielding layer coated outside the cable core and a copper wire braided shielding layer coated outside the aluminum-plastic composite belt shielding layer.
3. The signal cable of claim 1, wherein: the first insulated wire pair, the second insulated wire pair, the third insulated wire pair and the fourth insulated wire pair are sequentially arranged and distributed in the shielding layer in a clockwise direction.
4. The signal cable of claim 1, wherein: and the two insulated wire cores in each insulated wire pair are uniformly twisted.
5. The signal cable of claim 1, wherein: the synthetic mica tape is formed by bonding mica, a glass fiber tape and a polyester film through polyester resin.
6. The signal cable of claim 1, wherein: the outer tegument layer is extruded outside the shielding layer by silicon rubber.
7. The signal cable of claim 1, wherein: the conductor is formed by twisting a plurality of soft copper wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210622827.0A CN114999728A (en) | 2022-06-01 | 2022-06-01 | Signal cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210622827.0A CN114999728A (en) | 2022-06-01 | 2022-06-01 | Signal cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114999728A true CN114999728A (en) | 2022-09-02 |
Family
ID=83030578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210622827.0A Pending CN114999728A (en) | 2022-06-01 | 2022-06-01 | Signal cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114999728A (en) |
-
2022
- 2022-06-01 CN CN202210622827.0A patent/CN114999728A/en active Pending
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