CN214705464U - High-efficiency energy-saving overhead insulated cable - Google Patents
High-efficiency energy-saving overhead insulated cable Download PDFInfo
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- CN214705464U CN214705464U CN202120910777.7U CN202120910777U CN214705464U CN 214705464 U CN214705464 U CN 214705464U CN 202120910777 U CN202120910777 U CN 202120910777U CN 214705464 U CN214705464 U CN 214705464U
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Abstract
The utility model belongs to the technical field of cables, in particular to a high-efficiency energy-saving overhead insulated cable, which comprises a conductor wire core and an outer cladding layer wrapped outside the conductor wire core; the conductor wire core comprises a stranded conductor, and the stranded conductor comprises a tensile unit wire core on an inner layer and a plurality of aluminum single wires stranded outside the tensile unit wire core; the tensile unit wire core is formed by twisting a plurality of aluminum-clad carbon fiber single wires. Insulated cable have light in weight, the external diameter is little, intensity is big, low line loss, sag little, high temperature resistant, corrosion-resistant, characteristics such as ageing resistance, same capacity line investment cost is less than other aerial insulated cable far away.
Description
Technical Field
The utility model belongs to the technical field of the cable, especially, relate to a high-efficient energy-saving overhead insulated cable.
Background
At present, 10KV insulated lines erected in suburbs are all aluminum cores, the span cannot be effectively enlarged, the span of an insulated conductor cannot be larger than 50 meters generally, most of the span of the existing suburb or rural bare conductors is 65-70 meters, and when the original bare conductors are replaced by ordinary insulated aluminum wires, inserting rods are needed in more places. Part of the inserted rods and even the span are uneven, and the part where the inserted rods are not inserted causes the following problems: the design is difficult and the cost is increased; line height difference, increased sag, insufficient windage and increased hidden danger; the strength is damaged and the margin is reduced.
If the insulated steel-cored aluminum strand is adopted, although the tension is large, the following defects exist: (1) the steel core and the conductor are not equal in service life, and the steel core is easy to corrode at a peeling opening and the center of a lead sag; (2) because the steel core resistance is greater than that of aluminum, the conductivity of steel is about 9% IACS, and power transmission is basically ignored, aluminum wires need to be twisted outside the steel core to be used as electric energy transmission carriers, so that the outer diameter of the insulated wire is greatly increased, and the following problems are caused:
(1) the air pressure of the lead is increased, the metal conductor is subjected to fatigue and strand breakage under the action of long-term alternating stress, and the service life of the overhead cable is greatly reduced;
(2) the wire weight is big, and the arc hangs down greatly for the span between pole, the tower reduces, and the height increases, and the whole investment of circuit is great, and the too big potential safety hazard that exists of arc hangs down.
(3) The insulated wire does not block water, because the lap joint of the branch joint, the insulated wire has an opening, although the joint is wrapped by the insulating waterproof adhesive tape, water can still infiltrate from the joint, rainwater accumulates in the middle of the wire sag along the wire core all the time, and because of the influence of acid rain, the wire sag is chemically reacted with the steel core, and the wire is gradually corroded to cause stress breakage.
(4) After the circuit is electrified, galvanic corrosion exists between the aluminum wire and the galvanized steel wire, and the service life of the cable can be shortened.
(5) The steel wire material can cause magnetic loss and heat effect, and the transmission loss of the line is large.
If an aluminum alloy core is adopted, although the aluminum alloy core has strong corrosion resistance, the conductivity of the aluminum alloy is about 61% IACS, and the electrical property is acceptable, the strength is only about 1/10 of a steel wire, so that the tension of an insulated wire is insufficient, the insulated wire is easy to fatigue and break, and the use of a large span cannot be realized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an energy-efficient type aerial insulated cable, this insulated cable have light in weight, the external diameter is little, intensity is big, low line loss, sag little, high temperature resistant, corrosion-resistant, characteristics such as ageing resistance, same capacity line investment cost is less than other aerial insulated cables far away.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an efficient energy-saving overhead insulated cable comprises a conductor wire core and an outer cladding layer wrapped outside the conductor wire core; the conductor wire core comprises a stranded conductor and a semi-conductive water-blocking wrapping tape wrapped outside the stranded conductor; the stranded conductor comprises a tensile unit wire core at the inner layer and a plurality of aluminum single wires stranded outside the tensile unit wire core; tensile unit sinle silk is formed by a plurality of aluminium package carbon fiber single lines transposition, aluminium package carbon fiber single line includes the aluminium lamination and is wrapped up the super strength carbon fiber tensile reinforcement core including by the aluminium lamination.
Conductor sinle silk of cable adopted aluminium package carbon fiber single line, have following advantage
(1) Superstrong carbon fiber tensile strength surpasss 2800 sand-paper 3400MPa, the tensile strength 1240Mpa-1410Mpa of steel wire, intensity is more than 2 times of steel wire, the conductor sinle silk of cable adopted aluminium package carbon fiber single line, can improve the short burst problem of fatigue of aerial insulated cable by a wide margin, improve cable life.
(2) The corrosion is a great problem of the power transmission line, two different metals can generate electric corrosion after being electrified, the corrosion can shorten the strength of the lead and reduce the service life of the lead, but the carbon fiber can not generate electric corrosion with an aluminum wire, so that the problem of electric corrosion during the operation of the overhead insulated cable can be solved, and the service life is prolonged.
(3) Low sag and sag reduction of more than 10 times. Compared with a steel-cored aluminum strand, the carbon fiber has the obvious characteristic of low sag, can not sag to 1/10 of the steel-cored aluminum strand under the high-temperature condition, can effectively reduce an insulated space corridor of an overhead line, and improves the safety and reliability of the operation of a wire.
(4) The carbon fiber wire has no magnetic loss and thermal effect caused by steel wire materials, and has lower operating temperature under the condition of conveying the same load, so that the power transmission loss can be reduced by 6 percent.
(6) The carbon fiber wire has a specific gravity of about 1/4 in steel and is lightweight.
Preferably, the water-blocking yarn is added in the gaps of the aluminum-coated carbon fiber single wires and the aluminum single wires, and the conductor enables the cable to have a longitudinal water-blocking function through the water-blocking yarn and the semi-conductive water-blocking wrapping tape, so that the problem that the steel core in the sag center is easy to corrode and crack is solved completely, and the service life of the cable is prolonged.
Preferably, the outer cladding comprises an outer shield layer and an outermost outer insulating layer.
Preferably, the outer shielding layer is a semiconductive non-metallic shielding layer.
Preferably, the outer insulating layer is a weather-resistant crosslinked polyethylene insulating layer.
Preferably, the plurality of aluminum single wires have the same outer diameter.
Preferably, the outer diameter of the aluminum single wire is the same as or different from the outer diameter of the aluminum-coated carbon fiber single wire, so that a conductive wire core with required capacity is formed.
Preferably, all the strands are one-time strands, the stranded layer where the aluminum single wires are located is compacted and stranded, and the compaction coefficient is not less than 0.9.
Advantageous effects
The utility model discloses an energy-efficient type aerial insulated cable, because characteristics such as this kind of cable light in weight, external diameter are little, intensity is big, low line loss, sag are little, high temperature resistant, corrosion-resistant, ageing resistance, same capacity line investment cost is less than other aerial insulated cable. This patent insulated cable specifically have following beneficial effect:
(1) through with the aluminium cladding on conductive carbon fiber, the aluminium of formation wraps the carbon fiber single line, improves cold working plasticity, can keep the shape after the cold processing, is favorable to inseparabler rounding more in conductor transposition, sticising the in-process more.
(2) Because the insulated cable described in this patent is strong, light in weight, and small in sag, the span between the pole and the tower can be increased, the height is reduced, and the cost of the same capacity line is lower than that of the common wire.
(3) The outer diameter of the conductor of the overhead insulated cable is smaller than that of the steel-cored aluminum strand conductor, so that the use amount of insulation shielding and external insulation can be saved, and the effects of energy conservation and consumption reduction are achieved.
(4) The conductor passes through the yarn that blocks water, semi-conductive band that blocks water for the cable has the longitudinal function of blocking water, can solve the central steel core of arc completely and corrode the short problem of splitting, improves cable life.
(5) The carbon fiber can not generate electric corrosion with the aluminum wire, the problem of electric corrosion when the overhead insulated cable runs can be solved, and the service life of the cable is prolonged.
(6) The carbon fiber has no magnetic loss and thermal effect caused by steel wire material, and has lower operation temperature under the condition of conveying the same load, so that the transmission loss can be reduced by 6 percent.
Drawings
FIG. 1 is a schematic structural diagram of an energy-efficient overhead insulated cable according to example 1 of this patent;
in the figure, 1: the superstrong carbon fiber tensile strength core; 2: an aluminum layer; 3: water-blocking yarn; 4: an aluminum wire;
5: a semiconductive water-blocking tape; 6: a semiconductive non-metallic shield layer; 7: and the weather-resistant crosslinked polyethylene insulating layer.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not intended to limit the invention, and those skilled in the art will appreciate that modifications within the scope of the invention do not depart from the spirit and scope of the invention.
Example 1
As shown in fig. 1, the high-efficiency energy-saving overhead insulated cable can resist the temperature of carbon fiber more than 1000 ℃, so that circular carbon fiber with equal outer diameter is used as a reinforcing core, and an aluminum layer 2 is extruded and wrapped on an ultra-strong carbon fiber tensile reinforcing core 1 through a high-temperature wrapping machine to form a plurality of aluminum-wrapped carbon fiber single wires with equal outer diameter; twisting the aluminum-coated carbon fiber single wires into a tensile unit wire core; the aluminum single wire 4 with the same outer diameter is stranded on the tensile unit wire core, and the outer diameter of the aluminum single wire is not the same as that of the aluminum-coated carbon fiber single wire, so that a conductive wire core with the required capacity is formed; all the strands are one-time strands, the strand layer where the aluminum single wire is located is compacted and stranded, the compaction coefficient is not less than 0.9, water-blocking yarns 3 are added into gaps of the single wires, and the outermost layer of the stranded conductor is wrapped with a semi-conductive water-blocking wrapping tape 5 to form a round compacted conductor wire core; the semi-conductive non-metal shielding layer 6 and the weather-resistant cross-linked polyethylene insulating layer 7 are co-extruded to form an outer shield and an outer insulating layer.
The properties of conventional aluminum conductor steel reinforced are given in the following table:
TABLE 1 Performance of conventional aluminum conductor steel reinforced
The strength of the carbon fiber is more than 2 times of that of the steel wire, so that the tensile strength of the steel wire can be achieved by only using 1/2 with the steel wire as the carbon fiber section, wherein the section of the carbon fiber is 29.6/2-14.8 mm2(ii) a The section of the aluminum is kept at 50.7mm2The carbon fiber is used as a coating carbon fiber and the outer layer of the conductor is twisted in proportion; the section of the steel wire is reduced by 14.8mm2(weight reduction 14.8 × 7.9 ═ 116.9 kg/km); 14.8mm2The weight of the carbon fiber is (116.9/4-29.2 kg/km), which is reduced by 116.9-29.2-87.7 kg/km compared with the steel wire with the corresponding section; the total weight is reduced by 87.7+ 116.9-204.6 kg/km, and the total section is reduced by 14.8mm2Since the sectional area is reduced, the outer diameter of the conductor is also greatly reduced.
Therefore, the structure can greatly reduce the weight of the cable and the outer diameter of the conductor.
This patent insulated cable specifically have following beneficial effect:
(1) through with the aluminium cladding on conductive carbon fiber, the aluminium of formation wraps the carbon fiber single line, improves cold working plasticity, can keep the shape after the cold processing, is favorable to inseparabler rounding more in conductor transposition, sticising the in-process more.
(2) Because the insulated cable described in this patent is strong, light in weight, and small in sag, the span between the pole and the tower can be increased, the height is reduced, and the cost of the same capacity line is lower than that of the common wire.
(3) The outer diameter of the conductor of the overhead insulated cable is smaller than that of the steel-cored aluminum strand conductor, so that the use amount of insulation shielding and external insulation can be saved, and the effects of energy conservation and consumption reduction are achieved.
(4) The conductor passes through the yarn that blocks water, semi-conductive band that blocks water for the cable has the longitudinal function of blocking water, can solve the central steel core of arc completely and corrode the short problem of splitting, improves cable life.
(5) The carbon fiber can not generate electric corrosion with the aluminum wire, the problem of electric corrosion when the overhead insulated cable runs can be solved, and the service life of the cable is prolonged.
(6) The carbon fiber has no magnetic loss and thermal effect caused by steel wire material, and has lower operation temperature under the condition of conveying the same load, so that the transmission loss can be reduced by 6 percent.
The examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (10)
1. The utility model provides an energy-efficient type aerial insulated cable which characterized in that: comprises a conductor wire core and an outer cladding layer wrapped outside the conductor wire core; the conductor wire core comprises a stranded conductor, and the stranded conductor comprises a tensile unit wire core on an inner layer and a plurality of aluminum single wires stranded outside the tensile unit wire core; the tensile unit wire core is formed by twisting a plurality of aluminum-clad carbon fiber single wires.
2. The energy efficient overhead insulated cable of claim 1, wherein: the aluminum-clad carbon fiber single wire comprises an aluminum layer and an ultra-strong carbon fiber tensile reinforced core wrapped by the aluminum layer.
3. The energy efficient overhead insulated cable of claim 1, wherein: and water-blocking yarns are added into gaps of the aluminum-coated carbon fiber single wires and the aluminum single wires.
4. The energy efficient overhead insulated cable of claim 1, wherein: and the conductor wire core is wrapped with a semi-conductive water-blocking wrapping tape.
5. The energy efficient overhead insulated cable of claim 1, wherein: the outer cladding includes an outer shield layer and an outermost outer insulating layer.
6. The energy-efficient overhead insulated cable of claim 5, wherein: the outer shielding layer is a semi-conductive non-metallic shielding layer.
7. The energy-efficient overhead insulated cable of claim 5, wherein: the outer insulating layer is a weather-resistant cross-linked polyethylene insulating layer.
8. The energy efficient overhead insulated cable of claim 1, wherein: the aluminum single wires are equal in outer diameter.
9. The energy efficient overhead insulated cable of claim 8, wherein: the outer diameter of the aluminum single wire is the same as or different from that of the aluminum-coated carbon fiber single wire.
10. The energy efficient overhead insulated cable of claim 1, wherein: all the strands are one-time strands, the stranded layer where the aluminum single wire is located is compacted and stranded, and the compaction coefficient is not less than 0.9.
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| CN202120910777.7U CN214705464U (en) | 2021-04-29 | 2021-04-29 | High-efficiency energy-saving overhead insulated cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113053570A (en) * | 2021-04-29 | 2021-06-29 | 上海飞航电线电缆有限公司 | High-efficiency energy-saving overhead insulated cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113053570A (en) * | 2021-04-29 | 2021-06-29 | 上海飞航电线电缆有限公司 | High-efficiency energy-saving overhead insulated cable |
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