CN115798795A - Cable and method for manufacturing cable - Google Patents
Cable and method for manufacturing cable Download PDFInfo
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- CN115798795A CN115798795A CN202211654418.5A CN202211654418A CN115798795A CN 115798795 A CN115798795 A CN 115798795A CN 202211654418 A CN202211654418 A CN 202211654418A CN 115798795 A CN115798795 A CN 115798795A
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The present invention provides a cable and a method of manufacturing a cable, the cable comprising: the cable core comprises a conductor formed by twisting soft metal wires; the water-blocking structure layer is arranged on the outer side of the cable core; the copper sheath is arranged on the outer side of the water-blocking structure layer, and the thickness of the copper sheath ranges from 0.1mm to 0.2mm; the armor layer is arranged on the outer side of the copper sheath; the outer protective layer is arranged on the outer side of the armor layer. According to the cable provided by the invention, the cable core adopts the soft conductor, and the copper sheath is thinner, so that the overall weight of the cable is reduced, the light-weight design of the cable is realized, and meanwhile, the installation and maintenance are facilitated. In addition, because the outside of cable core has set gradually structural layer, copper sheath, armor and outer jacket that blocks water for the cable has integrateed waterproof, fire prevention, protection against rodents ant and has burnt multiple functions such as low harm of low cigarette, can satisfy the user demand better.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a cable and a manufacturing method of the cable.
Background
In recent years, the urban rail transit industry in China keeps rapid development in planning construction, operating line scale and investment amount. The construction of subway inter-section tunnels, subway stations, equipment installation, fire control and the like all requires a large number of power cables (rail transit usually adopts a strong current mode for power supply). The existing power cable mainly comprises a direct current traction cable, a flame-retardant cable, a fire-resistant cable, a green environment-friendly cable, a self-temperature-control cable and other special cables. The direct-current traction cable is mainly applied to a traction power supply system and mainly used for a feeder line and a return line between a traction substation and a contact network.
However, most of the existing direct current traction cables still have the defects that the cables are not light enough in weight and not high enough in flexibility, so that the installation and later maintenance of the cables are influenced, and a space for further improvement exists.
Disclosure of Invention
The invention provides a cable and a manufacturing method thereof, wherein the cable is light in weight, high in flexibility and convenient to install and maintain.
The present invention provides a cable comprising: the cable core comprises a conductor formed by twisting soft metal wires; the water-blocking structure layer is arranged on the outer side of the cable core; the copper sheath is arranged on the outer side of the water-blocking structure layer, and the thickness of the copper sheath ranges from 0.1mm to 0.2mm; the armor layer is arranged on the outer side of the copper sheath; the outer jacket is arranged on the outer side of the armor layer.
According to the cable provided by the invention, the cable core adopts the conductor with the soft structure, and the copper sheath is thinner, so that the whole weight of the cable is favorably reduced, the light weight design of the cable is realized, and meanwhile, the installation, the laying and the later maintenance are convenient. In addition, because the outside of cable core has set gradually structural layer, copper sheath, armor and the outer jacket that blocks water for the cable has integrateed waterproof, fire prevention, protection against rodents ant and has burnt multiple functions such as low harm of low cigarette, can satisfy the user demand better.
Optionally, the cable core is formed by twisting five types of soft tinned copper wire conductors.
In some embodiments, the water-blocking structural layer comprises: the semi-conductive water-blocking tape, the insulating layer and the semi-conductive water-blocking binding belt are sequentially arranged from inside to outside along the radial direction of the cable core.
In a specific example, the insulating layer is a crosslinked polyethylene insulating layer.
In some embodiments, the copper sheath is welded to the outside of the semi-conductive water-blocking tie.
According to some embodiments of the invention, the cable further comprises a ceramic tape and a flame retardant polyethylene layer, wherein the ceramic tape and the flame retardant polyethylene layer are arranged on the outer side of the copper sheath in sequence from inside to outside along the radial direction of the cable core.
Optionally, the armor layer is a nonmagnetic brass strip armor layer, and the armor layer is arranged on the outer side of the flame-retardant polyethylene layer.
Optionally, the outer sheath is a low-smoke halogen-free flame-retardant polyolefin sheath material, the oxygen index of the outer sheath ranges from 35% to 45%, and the light transmittance of the outer sheath ranges from 88% to 92%.
A second aspect of the present invention provides a method of manufacturing a cable applied to the cable according to the first aspect of the present invention, the method comprising the steps of: forming a water-blocking structure layer outside the cable core of the cable; forming a copper sheath outside the water-blocking structure layer; an armor layer outside the copper sheath; and extruding an outer protective layer on the armor layer.
According to the manufacturing method of the cable, the cable core is made of the soft conductor, and the copper sheath is thin, so that the overall weight of the cable is reduced, the flexibility is improved, the post-installation and maintenance are facilitated, and the manufacturing process of the cable is simple and convenient.
In some embodiments, said forming a copper sheath outside said water-blocking structure layer comprises: welding the copper sheath on the semi-conductive water-blocking binding belt of the water-blocking structure layer; the manufacturing method further comprises the steps of: wrapping a ceramic tape on the copper sheath; extruding a flame retardant polyethylene layer on the ceramic tape.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural view of the cable of the present invention.
Description of reference numerals:
100-a cable;
1-a cable core;
2-semi-conductive water-blocking tape;
3-an insulating layer;
4-semi-conductive water-blocking binding tapes;
5-copper sheathing;
6-a ceramic tape;
7-a flame retardant polyethylene layer;
8-an armor layer;
9-outer sheath.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In recent years, the urban rail transit industry in China keeps rapid development in planning construction, operating line scale and investment amount. The construction of subway tunnels, subway stations, equipment installation, fire control, etc. requires a large number of power cables (rail transit usually uses a strong electric power mode for power supply). The existing power cable mainly comprises a direct current traction cable, a flame-retardant cable, a fire-resistant cable, a green environment-friendly cable, a self-temperature-control cable and other special cables. The direct-current traction cable is mainly applied to a traction power supply system, mainly used for a feeder line and a return line between a traction substation and a contact network, and has a self-evident function.
However, most of the existing direct current traction cables still have the defects that the cables are not light enough in weight and not high enough in flexibility, so that the installation and later maintenance of the cables are influenced, and a space for further improvement exists.
In view of this, the invention provides a cable, which is lighter and more flexible, and can better meet the use requirement.
Referring to fig. 1, a cable 100 according to an embodiment of the present invention is described in detail below.
The cable 100 according to the embodiment of the present invention may be a cable for DC1500V (direct current 1500V) rail transit. Specifically, the cable includes: the cable comprises a cable core 1, a water-blocking structure layer, a copper sheath 5, an armor layer 8 and an outer protective layer 9.
Specifically, the cable core 1 may include a conductor in which soft metal wires are twisted, and for example, the conductor may be a five-type soft conductor that satisfies the requirements of GB/T3956-2008. The water-blocking structure layer is arranged on the outer side of the cable core 1 and can be used for guaranteeing the water-blocking effect of the cable 100 and avoiding the influence of a humid environment on the cable 100. The copper sheath 5 is arranged on the outer side of the water-blocking structure layer, the thickness of the copper sheath 5 ranges from 0.1mm to 0.2mm, for example, the thickness of the copper sheath 5 can be 0.1mm,0.2mm and the like, the invention is not limited to the above, the thickness of the copper sheath 5 can be reasonably selected within the value range, so that the copper sheath 5 is thinner and lighter, the copper sheath 5 is beneficial to enhancing the tolerance of the cable 100 to open fire, and reducing the risk of the cable 100 producing open fire due to accidents, the copper sheath 5 can adopt a copper metal sheath meeting the B1-level fire-resistant grade required by GB8624-2012, and the copper sheath 5 can not only improve the fire-resistant performance of the cable 100, but also play a shielding role on the cable core 1. The armor layer 8 is arranged on the outer side of the copper sheath 5, and the armor layer 8 can prevent rat bite and termite bite. The outer jacket 9 is arranged on the outer side of the armor layer 8, and the outer jacket 9 can be made of flame-retardant and low-smoke materials after combustion.
According to the cable 100 provided by the embodiment of the invention, the cable core 1 adopts the conductor with the soft structure, and the copper sheath 5 is arranged outside the water-blocking structure layer, so that the thickness of the copper sheath 5 is smaller, the overall weight of the cable 100 is favorably reduced, the flexibility is improved, and the installation, the laying and the later maintenance are convenient. Simultaneously, because the outside of cable core 1 has set gradually structural layer, copper sheath 5, armor 8 and outer jacket 9 that blocks water for cable 100 has integrated waterproof, fire prevention, protection against rodents ant and has burnt multiple functions such as low harm of low cigarette, can satisfy the user demand better. Further, the radius of the installation structure of the cable of the non-flexible structure in the related art is 12 times the outer diameter of the cable, whereas the radius of the installation structure of the cable 100 of the flexible structure of the present embodiment is 6 times the outer diameter of the cable 100, so that the space and weight occupied by the installation structure of the cable 100 can be reduced, and the cable 100 can be more easily installed.
Optionally, the cable core 1 may be formed by twisting five types of soft tinned copper wire conductors meeting the requirements of GB/T3956-2008, so that the structure of the cable core 1 is softer and lighter.
In some embodiments, referring to fig. 1, the water-blocking structural layer may include: semiconductive waterproofing area 2, insulating layer 3 and semiconductive bundling 4 that blocks water, semiconductive waterproofing area 2, insulating layer 3 and semiconductive bundling 4 set gradually from inside to outside along the radial of cable core 1, so, through the bilayer structure that blocks water, can promote cable 100's the effect that blocks water.
The semi-conductive water-blocking tape 2 is a material formed by compounding polyester fiber non-woven fabric and a high water-absorbing material, has strong water-blocking performance, heat resistance and chemical stability, and has the characteristics of strong hygroscopicity and high expansion rate, the thickness of the semi-conductive water-blocking tape 2 is 0.9-2.1mm, the expansion is more than 14mm, the expansion speed is more than 7mm/s min, the tensile strength is 40N/cm, the longitudinal elongation is more than 12%, the surface resistance is less than 1500 omega, the volume resistivity is less than 1 x 106 ohm, the instantaneous heat-resistant temperature is 230 ℃, the long-term heat resistance is 90 ℃, and the water content is less than 9 percent, so that the current breakdown phenomenon caused by too large temperature difference during the operation of a cable can be avoided, and the effective water-blocking effect can be exerted.
In a specific example, the insulating layer 3 is a crosslinked polyethylene insulating layer, and the network three-dimensional structure of crosslinked polyethylene makes it have relatively excellent heat resistance, and good insulating properties, the insulation resistance further increases, the dielectric loss tangent value is small, the influence of temperature is not great, the damage to the environment is small, and thus, the insulating layer 3 can bear voltage, and the insulating effect is better.
According to some embodiments of the invention, referring to fig. 1, a copper sheath 5 is provided outside the semi-conductive water-blocking bandage 4. Cable 100 may also include: ceramic tape 6 and fire-retardant polyethylene layer 7, ceramic tape 6 and fire-retardant polyethylene layer 7 set gradually in the outside of copper sheath 5 from inside to outside along the radial of cable core 1, so, can further improve cable 100's fire resistance.
Alternatively, the ceramic tape 6 may be a high temperature resistant ceramic silicone rubber tape, which has excellent fire-proof, flame retardant, low smoke, non-toxic and other characteristics, the residue on the surface after burning is a layer of hard ceramic shell, the hard shell does not melt and drip in case of fire, and can pass the line integrity test of fire exposure for 90min and cooling for 15min at 950 ℃ -1000 ℃ specified in GB/T19216.21-2003.
Optionally, the armor layer 8 can be a non-magnetic brass strip armor layer 8, and the armor layer 8 is arranged outside the flame-retardant polyethylene layer 7, so that the brass strip armor layer 8 has better short-circuit current carrying capacity compared with steel strip armor, and meanwhile, the arrangement of the armor layer 8 can better prevent rat bite and termite bite, and ensure safe and reliable operation of the circuit.
Optionally, the outer protective layer 9 is a low-smoke halogen-free flame-retardant polyolefin sheath material, and the outer protective layer 9 is black, and has ultraviolet-resistant, rat-proof and ant-proof properties, so that the oxygen index of the outer protective layer 9 ranges from 35% to 45%, and the light transmittance of the outer protective layer 9 ranges from 88% to 92%, for example, the oxygen index of the outer protective layer 9 may range from 35%, 38%, 40% or 45%, and the light transmittance of the outer protective layer 9 may range from 88%, 89%, 90%, 91% or 92%, so as to ensure ultraviolet resistance, rat-proof, ant-proof, flame-retardant and light transmittance of toxic gas released after combustion.
A method of manufacturing a cable 100 according to an embodiment of the second aspect of the invention is described below.
The method of manufacturing the cable 100 according to the embodiment of the present invention is applied to the cable 100 according to the above-described embodiment.
Specifically, the manufacturing method may include the steps of: a water-blocking structure layer is formed outside a cable core 1 of the cable 100, a copper sheath 5 is formed outside the water-blocking structure layer, an armor layer 8 is armored outside the copper sheath 5, and an outer protective layer 9 is extruded out of the armor layer 8. The cable core 1 may include a conductor formed by twisting soft metal wires, for example, the conductor may be a five-type soft conductor meeting the requirements of GB/T3956-2008, and the thickness of the copper sheath 5 has a value range of 0.1-0.2mm, so that the lightweight design of the cable is facilitated.
According to the manufacturing method of the cable 100 of the embodiment of the invention, the cable core 1 adopts the soft conductor, and the copper sheath 5 is arranged to be thinner, so that the whole weight of the cable 100 is reduced, the flexibility is improved, the later installation and maintenance are facilitated, and the manufacturing process of the cable 100 is simpler and more convenient.
In some embodiments, forming a water blocking structure layer outside the cable core 1 may include the following steps: the semi-conductive water-blocking tape 2 is wrapped outside the cable core 1, and the semi-conductive water-blocking tape 2 can play a role in blocking water for the cable core 1. An insulating layer 3 is extruded outside the semi-conductive water-blocking tape 2, and the insulating layer 3 is a cross-linked polyethylene insulating layer 3 so as to better bear voltage. The semi-conductive water-blocking binding belt 4 is wrapped outside the insulating layer 3, and the semi-conductive water-blocking binding belt 4 can play a good moisture-proof role.
In some embodiments, forming a copper jacket outside of the water-blocking structural layer may include the steps of: and welding a copper sheath 5 on the semi-conductive water-blocking binding tape 4 of the water-blocking structure layer, specifically, after winding a copper foil on the outer side of the semi-conductive water-blocking binding tape 4, welding a butt joint of the copper foil along the axial direction of the cable 100, thereby forming the copper sheath 5. The manufacturing method may further include the steps of: and a ceramic tape 6 is wrapped on the copper sheath 5 to play a role in fire prevention. A flame retardant polyethylene layer 7 is extruded onto the ceramic tape 6, which may serve a flame retardant function.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A cable, comprising:
the cable core comprises a conductor formed by twisting soft metal wires;
the water-blocking structure layer is arranged on the outer side of the cable core;
the copper sheath is arranged on the outer side of the water-blocking structure layer, and the thickness of the copper sheath ranges from 0.1mm to 0.2mm;
the armor layer is arranged on the outer side of the copper sheath;
the outer jacket is arranged on the outer side of the armor layer.
2. The cable of claim 1, wherein the cable core is stranded with five types of soft tinned copper wire conductors.
3. Cable according to claim 2, characterized in that the water-blocking structural layer comprises: the semi-conductive water-blocking tape, the insulating layer and the semi-conductive water-blocking binding belt are sequentially arranged from inside to outside along the radial direction of the cable core.
4. A cable according to claim 3, wherein the insulation layer is a crosslinked polyethylene insulation layer.
5. The cable of claim 3, wherein the copper sheath is welded to the outside of the semi-conductive water-blocking bandage.
6. The cable according to claim 5, further comprising a ceramic tape and a flame-retardant polyethylene layer, wherein the ceramic tape and the flame-retardant polyethylene layer are sequentially arranged on the outer side of the copper sheath from inside to outside along the radial direction of the cable core.
7. The cable of claim 6, wherein the armor is a nonmagnetic brass tape armor, the armor being disposed on the outside of the flame retardant polyethylene layer.
8. The cable according to claim 7, wherein the outer sheath is a low-smoke halogen-free flame-retardant polyolefin sheath material, the oxygen index of the outer sheath ranges from 35% to 45%, and the light transmittance of the outer sheath ranges from 88% to 92%.
9. A method for manufacturing a cable, to which a cable according to any one of claims 1 to 8 is applied, characterized in that it comprises the steps of:
forming a water-blocking structure layer outside the cable core of the cable;
forming a copper sheath outside the water-blocking structure layer;
an armor layer outside the copper sheath;
and extruding an outer protective layer on the armor layer.
10. The method of manufacturing a cable according to claim 9, wherein said forming a copper sheath outside said water-blocking structure layer comprises: welding the copper sheath on the semi-conductive water-blocking binding belt of the water-blocking structure layer;
the manufacturing method further comprises the steps of:
wrapping a ceramic tape on the copper sheath;
extruding a flame retardant polyethylene layer on the ceramic tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211654418.5A CN115798795A (en) | 2022-12-22 | 2022-12-22 | Cable and method for manufacturing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211654418.5A CN115798795A (en) | 2022-12-22 | 2022-12-22 | Cable and method for manufacturing cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115798795A true CN115798795A (en) | 2023-03-14 |
Family
ID=85427661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211654418.5A Pending CN115798795A (en) | 2022-12-22 | 2022-12-22 | Cable and method for manufacturing cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115798795A (en) |
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2022
- 2022-12-22 CN CN202211654418.5A patent/CN115798795A/en active Pending
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