CN211376221U - 66kV wind power high-voltage torsion cable - Google Patents
66kV wind power high-voltage torsion cable Download PDFInfo
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- CN211376221U CN211376221U CN201921889865.2U CN201921889865U CN211376221U CN 211376221 U CN211376221 U CN 211376221U CN 201921889865 U CN201921889865 U CN 201921889865U CN 211376221 U CN211376221 U CN 211376221U
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Abstract
The utility model discloses a 66kV wind-powered electricity generation high pressure twists reverse cable, include: a filling layer; the cable is positioned in the center and provided with three arc-shaped notches, and graphite powder is coated on the surface of each notch; three main wire cores; the graphite powder is arranged in the three arc-shaped gaps of the filling layer, and the graphite powder is coated on the surface of the filling layer; three grounding electric cores; the two main wire cores are respectively arranged between the two main wire cores and supported by a filling layer, and graphite powder is coated on the surface of the two main wire cores; the semi-conductive inner sheath layer, the fiber yarn weaving layer and the outer sheath are sequentially arranged outside the three main wire cores. The utility model discloses a filling layer has the arc breach, with main electric core shape inlay card of each other, has both strengthened cable tensile and antitorque property, and compact structure, and installation occupation space is little, and the transposition pitch is big simultaneously.
Description
Technical Field
The utility model relates to a cable especially relates to a 66kV wind-powered electricity generation high pressure twists reverse cable.
Background
Currently, the world is keen on continuous renewable new energy sources, and wind power generation plays a very important role. The driving force of future wind power technology development mainly comes from the rising offshore wind farm construction, and the development trend is irreversible. The offshore wind power generation unit gradually develops to a large-scale unit with more than 10MW, and the supporting foundation moves from a fixed type to a floating type. The scale of offshore wind farms will continue to grow towards larger scales. With the continuous increase of the capacity of the offshore wind power single unit, the voltage grade of the offshore cable in the field of 33kV gradually becomes a bottleneck for restricting the design of the offshore cable system. Thus, some european offshore wind farms are first attempting to increase the voltage level of the marine cables in the farm. The uk Blyth offshore exemplary wind farm under construction is the first offshore wind farm worldwide with 66kV on-site cable voltage rating, and many projects under planning or already bidding will also employ a 66kV voltage rating scheme. According to the prediction of the denmark wind energy consulting agency, the european market will turn to the 66kV voltage class overall from 2019. However, the domestic high-voltage rubber sleeve cable has large outer diameter and heavy weight and cannot meet the use requirement of the high-voltage wind power torsion cable.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that current cable performance can't satisfy, providing and nai turning round the performance reinforce, 66kV resistant wind-powered electricity generation flexible cable of turning round that the electrical property is excellent, the external diameter is little, light in weight.
Realize the utility model discloses the technical scheme of purpose is 66kV wind-powered electricity generation high pressure twists reverse cable, include: a saddle-shaped support filling layer; the cable is positioned in the center and provided with three arc-shaped notches, and graphite powder is coated on the surface of each notch; three main wire cores; the graphite powder is arranged in the three arc-shaped gaps of the filling layer, and the graphite powder is coated on the surface of the filling layer; three grounding electric cores; the two main wire cores are respectively arranged between the two main wire cores and supported by a filling layer, and graphite powder is coated on the surface of the two main wire cores; the semi-conductive inner sheath layer, the fiber yarn weaving layer and the outer sheath are sequentially arranged outside the three main wire cores. The utility model discloses a filling layer has the arc breach, with main electric core shape inlay card of each other, has both strengthened cable tensile and anti resistant twist performance, and compact structure, and the cable external diameter is little, weight is little.
Further, the main wire core sequentially comprises a main wire core conductor, a conductive nylon belt, a semi-conductive inner shielding layer, an insulating layer and a strippable semi-conductive outer shielding layer from inside to outside;
the insulating layer adopts HEPR ultra-clean ethylene propylene rubber. The utility model discloses an EPR insulating layer volume resistivity is high, and thickness reduces when satisfying insulativity, makes cable external diameter and weight reduction, practices thrift installation occupation space.
Preferably, the main core conductor is a five-type tin-plated copper conductor, tin-plated copper wires with the monofilament diameter of 0.485-0.490 mm are stranded into a tin-plated copper wire bundle with the diameter of 2.5mm, then 37 tin-plated copper wire bundles are stranded into the main core conductor in the left direction according to an arrangement structure of 1+6+12+18, and the stranding pitch from inside to outside is 20-22D, 16-18D and 12-14D in sequence. The utility model discloses a conductor adopts the layering to sticis a little, and this cable construction is soft, and the conductor is round and neat, and the outward appearance is smooth and the clearance is little. The insulating production of 66kV high-voltage cables is facilitated, the insulating eccentricity and conductor gap discharge phenomena can be reduced, and the electrical property and the torsion resistance of the cables are improved.
Preferably, the fiber yarn weaving layer is woven by dipping D1500 polyester yarn into a mixed solution of resorcinol-formaldehyde resin and latex, the weaving pitch is 80-90 mm, and the weaving density is 25-30%. After the impregnated mixed glue is extruded out and the outer sheath enters the vulcanizing pipeline, the inner sheath and the outer sheath can be bonded at the position of the polyester yarn at high temperature and high pressure, so that the tensile strength and the tearing resistance of the sheath are improved.
Furthermore, the grounding electric core is sequentially provided with a grounding conductor and a grounding wire core shielding layer from inside to outside.
Preferably, the grounding conductor is a five-type tin-plated copper conductor, tin-plated copper wires with the monofilament diameter of 0.29-0.30 mm are twisted into a tin-plated copper wire bundle with the diameter of 3.3mm, then 7 tin-plated copper wire bundles are twisted into the grounding conductor in the left direction according to an arrangement structure of 1+6, and the twisting pitch is 16-18D. The ground wire core and the main wire core keep the same bending radius and torsion amplitude, and the bending performance and the torsion performance of the cable can be improved.
Furthermore, the width of each side of the filling layer is at least 2.5mm, so that the filling layer can play a good supporting role.
After the technical scheme is adopted, the utility model discloses positive effect has: (1) the utility model discloses a filling layer has the arc breach, with main electric core shape inlay card of each other, makes cable main line core and ground core distribute more evenly moreover, has both strengthened cable tensile and resistance to torsion performance, and compact structure, and installation occupation space is little, and it is big to strand the pitch simultaneously.
(2) The utility model discloses an EPT rubber insulating layer electrical property is excellent, can reduce insulation thickness when satisfying the electrical property, makes cable external diameter and weight reduction, and it is more convenient to install, and can guarantee the electrical property and the compliance of cable.
(3) The utility model discloses all scribble the graphite powder on main line core, earth core, filling layer surface, reduced transition resistance, control below the transition resistance 500M omega.
(4) The utility model discloses a conductor adopts the layering to sticis a little, and this cable construction is soft, and the strand is the same with compound hank direction, and the outward appearance is smooth and the gap is little, is favorable to 66kv high tension cable insulation production, reduces the eccentricity, reduces the clearance discharge phenomenon, improves the electrical property of cable, and the conductor intercept can have the resistant torsional properties of improvement cable greatly.
(5) The utility model discloses a weaving behind the mixed liquid of D1500 dacron silk flooding resorcinol-formaldehyde resin and latex of cellosilk weaving layer adoption, the mixed glue of flooding can make inner sheath and oversheath can bond in the dacron silk position under high temperature high pressure after extruding the outer jacket and getting into the vulcanize pipeline to the tensile strength and the tear resistance performance of sheath have been improved.
(6) The width of each side of the filling layer is at least 2.5mm, and the filling layer can play a good supporting role.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
Fig. 1 is a schematic view of the cable of the present invention.
The reference numbers in the drawings are as follows:
a filling layer 100;
a main wire core 200; a main core conductor 210, a conductive nylon tape 220, a semi-conductive inner shield layer 230, an insulating layer 240 and a strippable semi-conductive outer shield layer 250;
a grounding electric core 300; a ground conductor 310, a ground core shielding layer 320;
a semi-conductive inner sheath 400;
a fiber yarn braid 500;
an outer sheath 600.
Detailed Description
(example 1)
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a 66kV wind-powered electricity generation high pressure twists reverse cable for solve the poor problem of cable performance among the prior art, in order to solve above-mentioned problem, the utility model discloses an overall thought as follows:
66kV wind-powered electricity generation high pressure torsion cable includes:
a filling layer 100; the cable is positioned in the center and provided with three arc-shaped notches, and graphite powder is coated on the surface of each notch;
three main wire cores 200; the graphite powder is arranged in three arc-shaped gaps of the filling layer 100, and the graphite powder is coated on the surface of the filling layer;
three grounding cells 300; the two main wire cores 200 are respectively arranged between the two main wire cores and supported by a filling layer 100, and graphite powder is coated on the surface of each main wire core;
the semiconductive inner sheath 400, the fiber yarn woven layer 500 and the outer sheath 600 are sequentially arranged outside the three main wire cores 200.
The utility model discloses a filling layer has the arc breach, with main electric core shape inlay card of each other, has both strengthened cable tensile and antitorque property, and compact structure, and installation occupation space is little, and the transposition pitch is big simultaneously.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
(example 1)
Referring to fig. 1, the 66kV wind power high voltage torsion cable of the embodiment includes:
a filling layer 100; the cable is saddle-shaped, is positioned in the center of the cable, is provided with three arc-shaped notches, and is coated with graphite powder on the surface; the width of each side of the filling layer 100 is at least 2.5 mm. The specific structure is that the center is a steel wire reinforced core, the outer part is semi-vulcanized and extruded with a semiconductive rubber material, wherein the steel wire reinforced core is a galvanized steel core steel wire rope with the monofilament diameter of 0.22-0.26 mm, the twisting direction is the left direction, and the twisting pitch is not more than 16 times of the outer diameter of the central reinforced steel wire rope. The utility model discloses a filling layer has the arc breach, with main electric core shape inlay card of each other, makes cable main line core and ground core distribute more evenly moreover, has both strengthened cable tensile and resistance to torsion performance, and compact structure, and installation occupation space is little, and it is big to strand the pitch simultaneously. And the central reinforced steel wire rope improves the load bearing capacity of the cable. The cable adopts 3+3 structure, and the external diameter is littleer, light in weight, and bending radius is little, can lay by whole root, has reduced installation cost. The width of each side of the filling layer is 2.5mm at least, and the filling layer can play a good supporting role.
Three main wire cores 200; the graphite powder is arranged in three arc-shaped gaps of the filling layer 100, and the graphite powder is coated on the surface of the filling layer; the main wire core 200 comprises a main wire core conductor 210, a conductive nylon tape 220, a semi-conductive inner shielding layer 230, an insulating layer 240 and a strippable semi-conductive outer shielding layer 250 from inside to outside in sequence; the main core conductor 210 is made of five types of tinned copper conductors, tinned copper wires with the monofilament diameter of 0.49-0.50 mm are twisted into tinned copper wire bundles with the diameter of 3.3mm, then 37 tinned copper wire bundles are twisted into the main core conductor 210 in the left direction according to an arrangement structure of 1+6+12+18, and the twisting pitches from inside to outside are 20-22D, 16-18D and 12-14D in sequence. The insulating layer 240 is made of HEPR ultra-clean ethylene propylene rubber, and the volume resistivity of the insulating material at 20 ℃ is 3.0 x 1016Ω·cm。
Three grounding cells 300; the two main wire cores 200 are respectively arranged between the two main wire cores and supported by a filling layer 100, and graphite powder is coated on the surface of each main wire core; the grounding electric core 300 is sequentially provided with a grounding conductor 310 and a ground wire core shielding layer 320 from inside to outside. The grounding conductor 310 is made of five types of tin-plated copper conductors, tin-plated copper wires with the monofilament diameter of 0.29-0.30 mm are twisted into a tin-plated copper wire bundle with the diameter of 3.3mm, then 7 tin-plated copper wire bundles are twisted into the grounding conductor 310 in the left direction according to an arrangement structure of 1+6, and the twisting pitch is 16-18D.
The semiconductive inner sheath 400, the fiber yarn woven layer 500 and the outer sheath 600 are sequentially arranged outside the three main wire cores 200. The fiber yarn weaving layer 500 is woven by dipping D1500 polyester yarn into mixed solution of resorcinol-formaldehyde resin and latex, the weaving pitch is 80-90 mm, and the weaving density is 25-30%.
Particularly, the coated graphite powder is ultra-fine graphite powder, so that the electric conduction effect can be achieved, and the friction force between the wire cores caused by torsion when the cable is used can be reduced. Transition resistance between the main wire core and the ground wire core before not using graphite powder is greater than 1500 omega, and transition resistance is 350 ~ 480 omega after using, and transition resistance is big, and the conductivity is poor between main wire core and the ground wire core, when the main wire core breaks down, can not in time switch on with the ground wire core, can not switch on out fault current, and fault current's accumulation causes the cable to generate heat even the explosion easily.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1.66kV wind-powered electricity generation high pressure twists reverse cable, its characterized in that includes:
a filler layer (100); the cable is positioned in the center and provided with three arc-shaped notches, and graphite powder is coated on the surface of each notch;
three main wire cores (200); the graphite powder is arranged in the three arc-shaped gaps of the filling layer (100), and the graphite powder is coated on the surface of the filling layer;
three grounding cells (300); the two main wire cores (200) are respectively arranged between the two main wire cores and supported by a filling layer (100), and graphite powder is coated on the surface of the filling layer;
the semi-conductive inner sheath (400), the fiber silk braid layer (500) and the outer sheath (600) are sequentially arranged outside the three main wire cores (200).
2. The 66kV wind power high-voltage torsion cable according to claim 1, wherein:
the main wire core (200) is sequentially provided with a main wire core conductor (210), a conductive nylon belt (220), a semi-conductive inner shielding layer (230), an insulating layer (240) and a strippable semi-conductive outer shielding layer (250) from inside to outside;
the insulating layer (240) is made of HEPR ultra-clean ethylene propylene rubber.
3. The 66kV wind power high-voltage torsion cable according to claim 2, wherein:
the main core conductor (210) adopts five types of tinned copper conductors, tinned copper wires with the monofilament diameter of 0.485-0.490 mm are twisted into tinned copper wire bundles with the diameter of 2.5mm in the left direction, then 37 tinned copper wire bundles are regularly twisted into the main core conductor (210) according to an arrangement structure of 1+6+12+18, and the twisting pitches from inside to outside are 20-22D, 16-18D and 12-14D in sequence.
4. The 66kV wind power high-voltage torsion cable according to claim 1, wherein:
the grounding electric core (300) is sequentially provided with a grounding conductor (310) and a ground wire core shielding layer (320) from inside to outside.
5. The 66kV wind power high-voltage torsion cable according to claim 4, wherein:
the grounding conductor (310) is a five-type tin-plated copper conductor, tin-plated copper wires with the monofilament diameter of 0.390-0.395 mm are stranded into a tin-plated copper wire bundle with the diameter of 3.4mm, then 7 tin-plated copper wire bundles are stranded into the grounding conductor (310) in the left direction according to an arrangement structure of 1+6, and the stranding pitch is 16-18D.
6. The 66kV wind power high-voltage torsion cable according to claim 1, wherein:
the width of each side of the filling layer (100) is at least 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921889865.2U CN211376221U (en) | 2019-11-05 | 2019-11-05 | 66kV wind power high-voltage torsion cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921889865.2U CN211376221U (en) | 2019-11-05 | 2019-11-05 | 66kV wind power high-voltage torsion cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211376221U true CN211376221U (en) | 2020-08-28 |
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ID=72154529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921889865.2U Active CN211376221U (en) | 2019-11-05 | 2019-11-05 | 66kV wind power high-voltage torsion cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211376221U (en) |
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2019
- 2019-11-05 CN CN201921889865.2U patent/CN211376221U/en active Active
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