CN220420292U - Termite-proof rat-proof cross-linked polyethylene insulated ultra-high voltage power cable - Google Patents
Termite-proof rat-proof cross-linked polyethylene insulated ultra-high voltage power cable Download PDFInfo
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- CN220420292U CN220420292U CN202321644092.8U CN202321644092U CN220420292U CN 220420292 U CN220420292 U CN 220420292U CN 202321644092 U CN202321644092 U CN 202321644092U CN 220420292 U CN220420292 U CN 220420292U
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- conductor
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- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 18
- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 102
- 239000011241 protective layer Substances 0.000 claims abstract description 52
- 239000004677 Nylon Substances 0.000 claims abstract description 22
- 229920001778 nylon Polymers 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 241000256602 Isoptera Species 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims description 65
- 238000005260 corrosion Methods 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 241000700159 Rattus Species 0.000 description 12
- 239000003814 drug Substances 0.000 description 6
- 229940079593 drug Drugs 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000002500 effect on skin Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 241000699670 Mus sp. Species 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model relates to the technical field of wires and cables, in particular to a termite-proof and rat-proof cross-linked polyethylene insulated ultrahigh voltage power cable, which comprises a wire core, an insulating layer coated on the periphery of the wire core, a water blocking layer coated on the periphery of the insulating layer, a first sheath coated on the periphery of the water blocking layer and a second sheath coated on the periphery of the first sheath, wherein the wire core is coated with a water blocking layer; the second sheath comprises an insulating protective layer and a nylon protective layer coated on the periphery of the insulating protective layer, and the insulating protective layer and the nylon protective layer are connected through double-layer coextrusion. The second sheath comprises the insulating protective layer and the nylon protective layer, the termite and rat preventing performance of the whole cable is improved by utilizing the inner protective layer and the outer protective layer, and meanwhile, the two protective layers are connected through double-layer coextrusion, so that the two protective layers can be better adhered, and the termite and rat preventing performance of the cable is further ensured.
Description
Technical Field
The utility model relates to the technical field of wires and cables, in particular to a termite-proof and rat-proof cross-linked polyethylene insulated ultrahigh voltage power cable.
Background
The wire and cable is used for transmitting electric (magnetic) energy, information and realizing electromagnetic energy conversion, and consists of single-strand or multi-strand wires and an insulating layer, and is generally called as a cable for short. The cable is widely applied to daily production and life, such as power transmission, information transmission and the like, and the environment conditions and the like of different use scenes are different, so that different requirements are provided for the performance of the cable. When termites and mice exist in the environment, the laid cable is often subjected to the biting of the termites and the mice in the use process, so that the cable is damaged, and even an electric power system is damaged in severe cases. In order to prevent the cable from being damaged, the traditional operation is to add termite-proof drugs into the cable, such as adding drugs into the raw material of the outer skin of the cable, or to coat drugs on the outer periphery of the outer skin of the cable, such as the termite-proof cable disclosed in the patent with publication number of CN209962733U, namely, the drugs are coated on the outer surface of the cable, so that although the termite-proof effect can be achieved, the performance of the cable is affected, the termite-proof drugs are toxic, the surrounding environment is affected, and in addition, the termite-proof drugs are difficult to prevent the larger rat from biting the cable.
Disclosure of Invention
In order to solve the problems, the utility model provides a termite-proof and rat-proof cross-linked polyethylene insulated ultrahigh voltage power cable which has good termite-proof and rat-proof performances.
The utility model is realized by the following scheme:
the termite-proof and rat-proof crosslinked polyethylene insulated ultrahigh voltage power cable comprises a wire core, an insulating layer coated on the periphery of the wire core, a waterproof layer coated on the periphery of the insulating layer, a first sheath coated on the periphery of the waterproof layer and a second sheath coated on the periphery of the first sheath; the second sheath comprises an insulating protective layer and a nylon protective layer coated on the periphery of the insulating protective layer, and the insulating protective layer and the nylon protective layer are connected through double-layer coextrusion. The insulating protective layer adopts PP, PP and nylon materials with little plasticizing temperature difference, so that double-layer coextrusion can be realized, perfect adhesion of two layers of sheaths can be realized, the overall termite and rat resistance is improved, and especially the Shore hardness D of the nylon sheath reaches 84, so that the anti-termite and rat resistance composite material is higher than the existing desinsection material and has more excellent performance.
Further, the wire core comprises a first conductor, a plurality of second conductors arranged around the first conductor, and a conductor wrapping tape wrapping the outer periphery of the second conductors. The whole wire core is wrapped by the conductor wrapping tape, so that the wire core can be fastened, and the first conductor and the second conductor are prevented from being scattered.
Further, the cross section of the first conductor is circular, and the cross section of the second conductor is fan-shaped. The intersection of two sides of the second conductor is provided with a round angle, and a plurality of second conductors encircle the first conductor and form a circle together with the first conductor.
Further, a cable paper is arranged between the adjacent second conductors. The cable paper can isolate adjacent second conductors to play an insulating effect, so that the purpose of reducing skin effect is achieved.
Further, the conductor wrapping band is a semiconductive Teflon wrapping band, and the width of the conductor wrapping band is 0.12-0.14 mm. The volume resistivity of the conductor wrapping tape is similar to that of the first shielding layer
Further, a first shielding layer is further arranged between the conductor and the insulating layer, a second shielding layer is arranged between the insulating layer and the water-resisting layer, and the first shielding layer and the second shielding layer are extrusion crosslinking type semiconductive shielding layers.
Further, the insulating protective layer is made of PP. The PP insulating protective layer has excellent mechanical properties, better tensile strength, compressive strength and hardness, and outstanding rigidity and bending fatigue resistance.
Further, the water blocking layer is a semiconductive buffer water blocking layer, and the lap rate of the semiconductive buffer water blocking layer is 40% -50%.
Further, the periphery of the first sheath layer is coated with an anti-corrosion layer, and the thickness of the anti-corrosion layer is 5-10 mu m. The anticorrosive coating is coated on the periphery of the first sheath layer, and a protective layer is formed on the surface of the first sheath layer.
Further, the thickness of the nylon protective layer is 0.5-1 mm. The nylon protective layer has higher Shore hardness, and can effectively prevent termites and rats.
Compared with the prior art, the utility model has the following beneficial effects:
the second sheath comprises the insulating protective layer and the nylon protective layer, the termite and rat preventing performance of the whole cable is improved by utilizing the inner protective layer and the outer protective layer, and meanwhile, the two protective layers are connected through double-layer coextrusion, so that the two protective layers can be better adhered, and the termite and rat preventing performance of the cable is further ensured. In addition, the cable also comprises an insulating layer, a first shielding layer, a second shielding layer, a first sheath, a water-resistant layer and an anti-corrosion layer, and has excellent termite and rat resistance and excellent conductivity, moisture resistance and anti-corrosion performance.
Drawings
Fig. 1 is a schematic cross-sectional view of a termite-proof and rat-proof cross-linked polyethylene insulated ultra-high voltage power cable provided by the utility model.
Fig. 2 is an enlarged view of a portion a in fig. 1.
The figure comprises the following components:
the cable comprises a cable core 1, a first conductor 1a, a second conductor 1b, a conductor wrapping tape 1c, an insulating layer 2, a water-resistant layer 3, a first sheath 4, a second sheath 5, an insulating protective layer 5a, a nylon protective layer 5b, a first shielding layer 6, a second shielding layer 7 and an anti-corrosion layer 8.
Detailed Description
In order to facilitate an understanding of the present utility model by those skilled in the art, the present utility model will be described in further detail with reference to specific examples and drawings.
Example 1
Referring to fig. 1-2, the utility model provides a termite-proof and rat-proof crosslinked polyethylene insulated ultra-high voltage power cable, which comprises a wire core 1, an insulating layer 2 coated on the periphery of the wire core 1, a water-resistant layer 3 coated on the periphery of the insulating layer 2, a first sheath 4 coated on the periphery of the water-resistant layer 3, and a second sheath 5 coated on the periphery of the first sheath 4; the second sheath 5 comprises an insulation protection layer 5a and a nylon protection layer 5b coated on the periphery of the insulation protection layer 5a, and the insulation protection layer 5a and the nylon protection layer 5b are connected through double-layer coextrusion. The insulating protective layer 5a adopts PP, PP and nylon materials with little plasticizing temperature difference, so that double-layer coextrusion can be realized, perfect adhesion of two layers of sheaths can be realized, the overall termite and rat resistance is improved, and particularly, the Shore hardness D of the nylon sheath reaches 84, and the material is higher than the existing disinsection material and has more excellent performance.
The wire core 1 comprises a first conductor 1a, a plurality of second conductors 1b arranged around the first conductor 1a, and a conductor wrapping tape 1c wrapping the periphery of the second conductors 1 b. The whole wire core 1 is wrapped by the conductor wrapping tape 1c, so that the wire core 1 can be fastened, and the first conductor 1a and the second conductor 1b are prevented from being scattered.
A cable paper is disposed between adjacent second conductors 1 b. The cable paper can isolate the adjacent second conductors 1b to play an insulating effect, thereby achieving the purpose of reducing skin effect. Specifically, when the cross-sectional area of the core 1 is large, skin effect affects the current-carrying capacity of the cable in the case of conducting alternating current. Therefore, when the section of the wire core 1 is more than 800mm 2 When the cable core 1 is needed to be divided into a plurality of components, the cable core 1 is divided into a first conductor 1a and 5 second conductors 1b surrounding the periphery of the first conductor 1a, and cable paper is arranged between the adjacent second conductors 1b for insulation and isolation, so that skin effect is reduced. In particular implementation, the second conductor 1bThe number of (c) is not limited to that listed in the present embodiment, and the specific number may be set according to actual cable specifications and requirements.
In this embodiment, the cross section of the first conductor 1a is circular, and the cross section of the second conductor 1b is fan-shaped. The intersection of two sides of the second conductor 1b is provided with a round angle, and a plurality of second conductors 1b encircle the first conductor 1a to form a round shape together with the first conductor 1 a. Of course, the shapes of the first conductor 1a and the second conductor 1b are not limited to circular and trapezoidal, and can be adaptively set according to specific use requirements.
The conductor wrapping tape 1c is a semiconductive Teflon tape, in this embodiment, the width of the conductor wrapping tape 1c is 0.12-0.14 mm, in this embodiment, 0.14mm, two conductor wrapping tapes 1c are arranged, and the lap rate is 30%. The volume resistivity of the conductor wrapping tape 1c is similar to that of the first shielding layer 6, and the volume resistivity of the conductor wrapping tape 1c is less than 1.0x10 3 Ω•cm。
A first shielding layer 6 is further arranged between the conductor and the insulating layer 2, a second shielding layer 7 is arranged between the insulating layer 2 and the water-resistant layer 3, and the first shielding layer 6 and the second shielding layer 7 are extrusion cross-linked semi-conductive shielding layers, wherein the volume resistivity of the first shielding layer 6 is less than 1.0x10 3 Omega. Cm, the volume resistivity of the second shielding layer 7 is < 500 omega. Cm.
The insulating protective layer 5a is made of PP, the insulating protective layer 5a made of the PP has excellent mechanical properties, good tensile strength, compression strength and hardness, outstanding rigidity and bending fatigue resistance, good heat resistance, good chemical stability, excellent electrical properties, good high-frequency resistance electrical insulation, and good electrical insulation in a humid environment. In addition, the relative dielectric constant of the PP protective layer is 2.18 (under the conditions of 50Hz and 20 ℃), the PE protective layer is superior to the PE protective layer of a line gauge in dielectric constant of 2.3, the density is similar to PE, and the probability of forming a water tree is lower than PE.
The water blocking layer 3 is a semiconductive buffer water blocking tape, the lap rate of the semiconductive buffer water blocking tape is 40% -50% (such as 45%), and meanwhile, in the embodiment, the volume resistivity of the semiconductive buffer water blocking tape is less than or equal to 20000 Ω & cm. The specific specification of the semiconductor electric buffer water-blocking tape can be adaptively selected according to the specification of the cable, for example, a 2×2.0mm×80mm semiconductive buffer water-blocking tape is selected when the specification of the cable is 64/110 kV, and a 4×2.0mm×80mm semiconductive buffer water-blocking tape is selected when the specification of the cable is 127/220 kV.
The outer periphery of the first sheath 4 layer is coated with a corrosion-proof layer 8, and the thickness of the corrosion-proof layer 8 is 5-10 μm (such as 8 μm). In this embodiment, the first sheath 4 is a welded corrugated aluminum sheath, the anti-corrosion layer 8 is asphalt, and the anti-corrosion layer 8 is coated on the periphery of the first sheath 4, so that the anti-corrosion layer can be dried rapidly, and a protective layer is formed on the surface of the first sheath 4.
The thickness of the nylon protective layer 5b is 0.5-1 mm, in this embodiment 1mm. The nylon protective layer 5b has higher Shore hardness reaching 84, and can effectively prevent termites and rats. In addition, the nylon protective layer 5b also has the characteristics of water resistance, cold resistance, oil resistance, gasoline resistance mixture, corrosion resistance, fire resistance, difficult aging and the like, and is environment-friendly and reliable.
In this embodiment, the overall structure of the cable sequentially includes, from inside to outside, a core 1, a first shielding layer 6, an insulating layer 2, a second shielding layer 7, a water-blocking layer 3, a first sheath 4, an anti-corrosion layer 8, and a second sheath 5.
Example 2
In this embodiment, the shapes of the first conductor 1a and the second conductor 1b are not limited to a circular shape and a fan shape, and the structures of the other parts are the same as those of embodiment 1, and thus a detailed description is omitted.
The second sheath 5 comprises the insulating protective layer 5a and the nylon protective layer 5b, the termite and rat preventing performance of the whole cable is improved by utilizing the inner protective layer and the outer protective layer, and meanwhile, the two protective layers are connected through double-layer coextrusion, so that the two protective layers can be better adhered, and the termite and rat preventing performance of the cable is further ensured. In addition, the cable also comprises an insulating layer 2, a first shielding layer 6, a second shielding layer 7, a first sheath 4, a water-resistant layer 3 and an anti-corrosion layer 8, and has excellent termite and rat resistance and excellent conductivity, moisture resistance and anti-corrosion performance.
In the description of the present utility model, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is merely for convenience in describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "fixed" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
While the utility model has been described in conjunction with the specific embodiments above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are included within the scope of the appended claims.
Claims (10)
1. The termite-proof and rat-proof crosslinked polyethylene insulated ultrahigh voltage power cable is characterized by comprising a cable core, an insulating layer coated on the periphery of the cable core, a waterproof layer coated on the periphery of the insulating layer, a first sheath coated on the periphery of the waterproof layer and a second sheath coated on the periphery of the first sheath; the second sheath comprises an insulating protective layer and a nylon protective layer coated on the periphery of the insulating protective layer, and the insulating protective layer and the nylon protective layer are connected through double-layer coextrusion.
2. The termite and rat resistant crosslinked polyethylene insulated ultra high voltage power cable of claim 1, wherein the wire core comprises a first conductor, a plurality of second conductors disposed around the first conductor, and a conductor strap wrapped around the second conductors.
3. The termite and rat resistant crosslinked polyethylene insulated ultra high voltage power cable of claim 2 wherein the first conductor is circular in cross section and the second conductor is fan shaped in cross section.
4. The termite and rat resistant crosslinked polyethylene insulated ultra high voltage power cable of claim 2 wherein a cable paper is disposed between adjacent said second conductors.
5. The termite-proof and rat-proof cross-linked polyethylene insulated ultra-high voltage power cable according to claim 2, wherein the conductor tape is a semiconducting terdolon tape, and the conductor tape width is 0.12-0.14 mm.
6. The termite-proof and rat-proof crosslinked polyethylene insulated ultrahigh voltage power cable according to claim 2, wherein a first shielding layer is further arranged between the conductor and the insulating layer, a second shielding layer is arranged between the insulating layer and the water-resistant layer, and the first shielding layer and the second shielding layer are extrusion crosslinked semiconductive shielding layers.
7. The termite-proof and rat-proof cross-linked polyethylene insulated ultra-high voltage power cable according to claim 1, wherein the insulation shield layer is PP.
8. The termite-proof and rat-proof crosslinked polyethylene insulated ultra-high voltage power cable according to claim 1, wherein the water blocking layer is a semiconducting buffer water blocking tape, and the overlap ratio of the semiconducting buffer water blocking tape is 40% -50%.
9. The termite-proof and rat-proof crosslinked polyethylene insulated ultra-high voltage power cable according to claim 1, wherein the outer circumference of the first sheath layer is coated with an anti-corrosion layer, and the thickness of the anti-corrosion layer is 5-10 μm.
10. The termite-proof and rat-proof crosslinked polyethylene insulated ultra-high voltage power cable according to claim 1, wherein the nylon protective layer has a thickness of 0.5-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321644092.8U CN220420292U (en) | 2023-06-27 | 2023-06-27 | Termite-proof rat-proof cross-linked polyethylene insulated ultra-high voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321644092.8U CN220420292U (en) | 2023-06-27 | 2023-06-27 | Termite-proof rat-proof cross-linked polyethylene insulated ultra-high voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220420292U true CN220420292U (en) | 2024-01-30 |
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ID=89644430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321644092.8U Active CN220420292U (en) | 2023-06-27 | 2023-06-27 | Termite-proof rat-proof cross-linked polyethylene insulated ultra-high voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220420292U (en) |
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2023
- 2023-06-27 CN CN202321644092.8U patent/CN220420292U/en active Active
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