CN219202821U - Longitudinal water-blocking type low-voltage power cable - Google Patents
Longitudinal water-blocking type low-voltage power cable Download PDFInfo
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- CN219202821U CN219202821U CN202223329413.3U CN202223329413U CN219202821U CN 219202821 U CN219202821 U CN 219202821U CN 202223329413 U CN202223329413 U CN 202223329413U CN 219202821 U CN219202821 U CN 219202821U
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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
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model belongs to the technical field of water-blocking electric cable application, and particularly discloses a longitudinal water-blocking type low-voltage electric cable which comprises an outer sheath, a first water-blocking tape, a shielding layer, a second water-blocking tape, an outer conductor part, an inner conductor part and the like. The utility model has the beneficial effects that: the first water blocking tape and the second water blocking tape are designed to achieve good double-layer water blocking and have strong water blocking characteristics; the water blocking performance is improved on the basis of the first water blocking belt, the second water blocking belt and the third water blocking belt by adding the first water blocking filling, the third water blocking filling, the second water blocking filling, the fourth water blocking filling and the fifth water blocking filling; the first outer stranded wire insulating layer and the second outer stranded wire insulating layer respectively conduct insulating protection on the first conductor and the second conductor after stranding, meanwhile, the first filling layer and the second filling layer of the silicon rubber enable the first conductor and the second conductor to be almost seamless, and the silicon rubber has obvious high-temperature stability, so that the first conductor and the second conductor have larger conductive performance.
Description
Technical Field
The utility model belongs to the technical field of water-blocking electric cable application, and particularly relates to a longitudinal water-blocking type low-voltage power cable.
Background
The power cable is a cable for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station outgoing lines, power supply in industrial and mining enterprises and power transmission lines under sea water passing through the river, and in the power lines, the proportion of the cable is gradually increasing. Power cables are cable products used in the main line of power systems to transmit and distribute high power electrical energy, including various voltage classes of 1-500KV and above, and various insulated power cables.
Moisture ingress is often the primary cause of damage to the power cable and its service life. The water immersion way mainly invades the cable from the protective layer of the cable and the end part of the cable to cause oxidation and corrosion of the conductor, thereby affecting the electrical performance of the cable and even generating abnormal wire breakage accidents; moisture permeates into the insulating layer, so that the insulating layer can generate water branches under the action of a strong electric field, the electric aging of the cable is accelerated, cable breakdown accidents are caused, and the service life of the cable is shortened.
In order to prevent moisture intrusion, it is required that there is no gap between the structures of the cable; with the large-scale application of crosslinked cables in China, the accidents of aging of insulating water trees and cable breakdown caused by invasion of ambient environment moisture into the cable are increased year by year, and more users are urgent to need cables with good water blocking performance so as to further improve the safety and reliability of a power system.
In the application of power engineering, the cable is usually laid in a direct-buried mode, a cable trench, a tunnel and the like, is inevitably in direct contact with water, and even can be soaked in water for a short term or a long term, so that the water can slowly permeate into the cable. Typical crosslinked polyethylene insulation materials produce water tree phenomena after the cable has been in operation for a period of time, which can lead to breakdown of the cable insulation when the water tree grows to a certain extent.
At present, how to design a water-blocking power cable solves the problem of the traditional power cable in use, is the direction of current research and solution, and further stops the water immersion phenomenon of the power cable, and improves the safety of a power transmission system.
Based on the problems, the longitudinal water-blocking type low-voltage power cable provided by the utility model.
Disclosure of Invention
The utility model aims to: the utility model aims at overcoming the defects of the prior art, and provides a longitudinal water-blocking type low-voltage power cable which solves the water immersion problem of the traditional power cable in the background art.
The technical scheme is as follows: the utility model provides a longitudinal water-blocking type low-voltage power cable, which comprises an outer sheath, wherein a first water-blocking tape, a shielding layer and a second water-blocking tape are sequentially arranged on the inner layer of the outer sheath, and an outer conductor part and an inner conductor part are arranged in the second water-blocking tape; the outer conductor part comprises a plurality of first outer stranded wire insulating layers in contact with the second outer stranded wire insulating layers, a plurality of first conductors respectively arranged in the first outer stranded wire insulating layers, a first filling layer respectively filled in the first outer stranded wire insulating layers and used in cooperation with the first conductors, a first water blocking filling layer and a second water blocking filling layer arranged between adjacent first outer stranded wire insulating layers, and the inner conductor part comprises a third water blocking belt respectively in contact with the first outer stranded wire insulating layers, a plurality of second outer stranded wire insulating layers arranged in contact with the third water blocking belt inner layers, a plurality of second conductors respectively arranged in the second outer stranded wire insulating layers, a second filling layer respectively filled in the second outer stranded wire insulating layers and used in cooperation with the second conductors, and a third water blocking filling layer and a fourth water blocking filling layer arranged between adjacent second outer stranded wire insulating layers.
According to the technical scheme, the longitudinal water-blocking type low-voltage power cable further comprises fifth water-blocking filling arranged in the third water-blocking belt and positioned between the second outer stranded wire insulating layers; the fourth water-blocking filling is uniformly distributed on the outer wall of the fifth water-blocking filling.
According to the technical scheme, the shielding layer is a copper braided shielding layer or a tinned copper braided shielding layer.
According to the technical scheme, the first filling layer and the second filling layer comprise but are not limited to silicone rubber.
According to the technical scheme, the diameters of the first water blocking filling and the third water blocking filling are the same, and are respectively larger than those of the second water blocking filling and the fourth water blocking filling; the diameter sizes of the second water blocking filling and the fourth water blocking filling are the same.
According to the technical scheme, the diameters of the first conductor and the second conductor are the same, and five conductors are respectively arranged; wherein the diameter of the single conductor is 2.5-3.4mm, and the thickness of the outer sheath is 1.5-2mm.
According to the technical scheme, the diameter of the structure formed by the outer sheath, the first water-blocking tape, the shielding layer, the second water-blocking tape, the outer conductor part and the inner conductor part is 12.6-28.7mm.
Compared with the prior art, the longitudinal water-blocking type low-voltage power cable has the beneficial effects that: 1. the first water blocking tape and the second water blocking tape are designed to achieve good double-layer water blocking and have strong water blocking characteristics; 2. the water blocking performance is improved on the basis of the first water blocking belt, the second water blocking belt and the third water blocking belt by adding the first water blocking filling, the third water blocking filling, the second water blocking filling, the fourth water blocking filling and the fifth water blocking filling; 3. the first outer stranded wire insulating layer and the second outer stranded wire insulating layer respectively conduct insulating protection on the first conductor and the second conductor after stranding, meanwhile, gaps between the first conductor and the second conductor are small and almost seamless due to the first filling layer of the silicon rubber and the second filling layer of the silicon rubber, the silicon rubber has remarkable high-temperature stability, and the silicon rubber can still keep certain flexibility, rebound resilience and surface hardness, so that the first conductor and the second conductor have larger conductive performance.
Drawings
In order to more clearly describe the embodiments of the present utility model or the technical solutions in the prior art, the following will be made
The drawings that are required for the embodiments are briefly described, and it is apparent that the drawings in the following description are merely some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort to those of ordinary skill in the art.
FIG. 1 is a schematic view of the front view of a longitudinal water blocking type power cable of the present utility model;
wherein, the reference numerals in the figures are as follows: 10-oversheath, 11-first water-blocking tape, 12-shielding layer, 13-second water-blocking tape, 14-first outer strand insulation layer, 15-first filling layer, 16-first conductor, 17-first water-blocking filling, 18-second water-blocking filling, 19-third water-blocking tape, 20-fifth water-blocking filling, 21-second filling layer, 22-second conductor, 23-second outer strand insulation layer, 24-third water-blocking filling, 25-fourth water-blocking filling.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
In describing the present utility model, it should be noted that the terms "top", "bottom", "one side" are used "
"other side", "front", "rear", etc "middle part", "interior", "top", "tip"
The orientation or positional relationship indicated by the "bottom end" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of description, and is not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
The longitudinal water blocking type power cable, as shown in fig. 1, includes an outer sheath 10,
the inner layer of the outer sheath 10 is provided with a first water-blocking tape 11, a shielding layer 12 and a second water-blocking tape 13 in sequence,
an outer conductor part and an inner conductor part are arranged in the second water blocking belt 13;
the outer conductor part comprises a plurality of first outer stranded wire insulating layers 14 contacted with the inner layer of the second water-resistant belt 13, a plurality of first conductors 16 respectively arranged in the first outer stranded wire insulating layers 14, a first filling layer 15 respectively filled in the first outer stranded wire insulating layers 14 and matched with the first conductors 16 for use, a first water-resistant filling 17 and a second water-resistant filling 18 arranged between adjacent first outer stranded wire insulating layers 14,
the inner conductor part comprises a third water-blocking tape 19 respectively contacted with the first outer stranded wire insulating layer 14, a plurality of second outer stranded wire insulating layers 23 respectively contacted with the inner layer of the third water-blocking tape 19, a plurality of second conductors 22 respectively arranged in the second outer stranded wire insulating layers 23, a second filling layer 21 respectively filled in the second outer stranded wire insulating layers 23 and matched with the second conductors 22 for use, and a third water-blocking filling 24 and a fourth water-blocking filling 25 arranged between the adjacent second outer stranded wire insulating layers 23.
Example two
On the basis of the first embodiment, the longitudinal water-blocking low-voltage power cable further comprises a fifth water-blocking filler 20 which is arranged in the third water-blocking tape 19 and is positioned between the second outer strand insulation layers 23; the fourth water-blocking filling 25 is uniformly distributed on the outer wall of the fifth water-blocking filling 20.
In addition, the preferred shielding layer 12 in the above embodiment is a copper braid shielding layer or a tin-plated copper braid shielding layer.
In addition, the first and second filling layers 15 and 21 preferred in the above embodiments include, but are not limited to, silicone rubber.
In addition, in the above embodiment, the diameters of the first water blocking filler 17 and the third water blocking filler 24 are the same, and are respectively larger than the diameters of the second water blocking filler 18 and the fourth water blocking filler 25; wherein the diameter sizes of the second water blocking filling 18 and the fourth water blocking filling 25 are the same.
In addition, in the above embodiment, the diameters of the first conductor 16 and the second conductor 22 are the same, and five conductors are provided respectively; wherein the diameter of the single conductor is 2.5-3.4mm, and the thickness of the outer sheath 10 is 1.5-2mm.
In addition, in the above embodiment, the diameter dimension of the structure constituted by the outer sheath 10, the first water blocking tape 11, the shielding layer 12, the second water blocking tape 13, the outer conductor portion and the inner conductor portion is 12.6 to 28.7mm.
The working principle or the structural principle of the longitudinal water-blocking type power cable with the structure is as follows: the outer jacket 10 is a crosslinked halogen-free flame retardant material, and the first water-blocking filling 17, the third water-blocking filling 24, the second water-blocking filling 18, the fourth water-blocking filling 25, and the fifth water-blocking filling 20 include, but are not limited to, water-blocking yarns or water-blocking tapes.
Further, the diameter size of the fifth water blocking filler 20 is larger than the diameter size of the first water blocking filler 17 or the diameter size of the third water blocking filler 24, respectively.
It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a vertical water-blocking type power cable, includes oversheath (10), its characterized in that:
the inner layer of the outer sheath (10) is sequentially provided with a first water-blocking tape (11), a shielding layer (12) and a second water-blocking tape (13), and an outer conductor part and an inner conductor part are arranged in the second water-blocking tape (13);
the outer conductor part comprises a plurality of first outer stranded wire insulating layers (14) which are contacted with the inner layer of the second water-blocking tape (13), a plurality of first conductors (16) which are respectively arranged in the first outer stranded wire insulating layers (14), a first filling layer (15) which is respectively filled in the first outer stranded wire insulating layers (14) and is matched with the first conductors (16) for use, and a first water-blocking filling (17) and a second water-blocking filling (18) which are arranged between the adjacent first outer stranded wire insulating layers (14),
the inner conductor part comprises a third water-blocking tape (19) which is respectively contacted with the first outer stranded wire insulating layer (14), a plurality of second outer stranded wire insulating layers (23) which are arranged on the inner layer of the third water-blocking tape (19) and a plurality of second conductors (22) which are respectively arranged in the second outer stranded wire insulating layers (23), a second filling layer (21) which is respectively filled in the second outer stranded wire insulating layers (23) and is matched with the second conductors (22), and a third water-blocking filling (24) and a fourth water-blocking filling (25) which are arranged between the adjacent second outer stranded wire insulating layers (23).
2. The longitudinal water-resistant power cable according to claim 1, wherein: the longitudinal water-blocking type low-voltage power cable further comprises fifth water-blocking filling (20) which is arranged in the third water-blocking tape (19) and is positioned between the second outer stranded wire insulating layers (23);
the fourth water-blocking filling (25) is uniformly distributed on the outer wall of the fifth water-blocking filling (20).
3. The longitudinal water-resistant power cable according to claim 1, wherein: the shielding layer (12) is a copper braided shielding layer or a tinned copper braided shielding layer.
4. The longitudinal water-resistant power cable according to claim 1, wherein: the first filling layer (15) and the second filling layer (21) comprise, but are not limited to, silicon rubber.
5. The longitudinal water-resistant power cable according to claim 1, wherein: the diameters of the first water blocking filling (17) and the third water blocking filling (24) are the same, and are respectively larger than the diameters of the second water blocking filling (18) and the fourth water blocking filling (25);
the diameters of the second water-blocking filling (18) and the fourth water-blocking filling (25) are the same.
6. The longitudinal water-resistant power cable according to claim 1, wherein: the diameters of the first conductor (16) and the second conductor (22) are the same, and five conductors are respectively arranged;
wherein the diameter of the single conductor is 2.5-3.4mm, and the thickness of the outer sheath (10) is 1.5-2mm.
7. The longitudinal water-resistant power cable according to claim 1, wherein: the diameter size of the structure formed by the outer sheath (10), the first water-blocking tape (11), the shielding layer (12), the second water-blocking tape (13), the outer conductor part and the inner conductor part is 12.6-28.7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223329413.3U CN219202821U (en) | 2022-12-13 | 2022-12-13 | Longitudinal water-blocking type low-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223329413.3U CN219202821U (en) | 2022-12-13 | 2022-12-13 | Longitudinal water-blocking type low-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219202821U true CN219202821U (en) | 2023-06-16 |
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ID=86719091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223329413.3U Active CN219202821U (en) | 2022-12-13 | 2022-12-13 | Longitudinal water-blocking type low-voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219202821U (en) |
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2022
- 2022-12-13 CN CN202223329413.3U patent/CN219202821U/en active Active
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