CN109003722B - Stretch-resistant and torsion-resistant wind energy cable for wind power generation - Google Patents
Stretch-resistant and torsion-resistant wind energy cable for wind power generation Download PDFInfo
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- CN109003722B CN109003722B CN201810766822.9A CN201810766822A CN109003722B CN 109003722 B CN109003722 B CN 109003722B CN 201810766822 A CN201810766822 A CN 201810766822A CN 109003722 B CN109003722 B CN 109003722B
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- cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/184—Sheaths comprising grooves, ribs or other projections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a stretch-resistant and torsion-resistant wind energy cable for wind power generation, which sequentially comprises an outer sheath, an armor layer, an outer flame-retardant layer and an outer insulating layer from outside to inside, wherein a supporting unit is arranged in the outer insulating layer, the supporting unit comprises a central pipe and 3 arc-shaped units with arc-shaped sections, the arc-shaped units are sheets with arc-shaped sections, the sections of the arc-shaped units extend along the length direction of the cable, a connecting unit is connected between each arc-shaped unit and the central pipe, a plurality of pressure-resistant pipes are fixedly connected to the outer sides of the arc-shaped units, a stretch-resistant rope is arranged in the central pipe, 3 cable core wires are arranged in the outer insulating layer, and the cable core wires comprise conductors, inner insulating layers, shielding layers, inner flame-resistant layers. The cable provided by the invention has good tensile resistance and torsion resistance.
Description
Technical Field
The invention relates to the field of cables, in particular to a stretch-resistant and torsion-resistant wind energy cable for wind power generation.
Background
With the progress and development of technology, cables are indispensable electrical equipment in life and production, and the cables can be classified into power cables, signal cables and the like according to different purposes, and can be classified into various cables such as ocean cables, wind power generation cables and the like according to different use occasions. The cable for wind power generation has a high requirement on the mechanical properties of the cable because the cable passes through the inside of the tower of the wind power generation device, the height of the tower is high, and the cable is repeatedly twisted during use. Current wind energy cables are of a wide variety but still do not meet all the needs.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provides a stretch-resistant and torsion-resistant wind energy cable for wind power generation.
The technical scheme is as follows: the utility model provides a cable, includes oversheath, armor, outer fire-retardant layer and outer insulating layer in proper order from outside to inside, the support element has in the outer insulating layer, the support element includes that center tube and 3 cross-sections are curved arc unit, the cross-section that the arc unit extends for following cable length direction is curved slice, is connected with the linkage unit between every arc unit and the center tube, a plurality of withstand voltage pipes of outside fixedly connected with of arc unit, the stretch-proofing rope has in the center tube, 3 cable core lines have in the outer insulating layer, cable core line includes conductor, inner insulating layer, shielding layer, inner fire-retardant layer and inner sheath from inside to outside.
Further, there are 3 connecting units, each connecting unit connects 1 arc unit and the central tube, and the connecting unit is in a sheet shape extending along the length direction of the cable.
Further, 3 cable cores and 3 connecting units are alternately distributed at intervals, and the cable cores are closer to the central tube than the arc-shaped units.
Further, the outer flame-retardant layer is a flame-retardant PVC tape.
Further, the outer and inner sheaths are made of a polyethylene material.
Further, the armor layer is a steel wire armor layer.
Further, the pressure resistant tube is made of rubber.
The invention also discloses a cable, which comprises a plurality of clamping devices and a plurality of wind energy cables, wherein each clamping device comprises a circular cylindrical part, an extrusion device, a locking bolt and a locking nut, the circular cylindrical part is connected with the circular plates through a plurality of connecting ribs, the extrusion device comprises a first extrusion plate, a second extrusion plate and a connecting cylinder for connecting the first extrusion plate and the second extrusion plate, the cross sections of the first extrusion plate and the second extrusion plate are circular, both sides of the longitudinal section of the first extrusion plate and the longitudinal section of the second extrusion plate are arc-shaped, the maximum outer diameter of the first extrusion plate is larger than that of the second extrusion plate, the first extrusion plate is fixedly connected with the top of the connecting cylinder, the second extrusion plate is fixedly connected with the bottom of the connecting cylinder, the first extrusion plate is provided with a first through hole, the second extrusion plate is provided with a second through hole, the circular plates are provided with a third through hole, and the bolt penetrates through the first through hole, the connecting cylinder, the second through hole, The third through hole is locked with the locking nut; the inner side of the circular cylindrical part is provided with a plurality of vertical through grooves with arc-shaped sections, and each vertical through groove is penetrated by one wind energy cable.
Further, the first pressing plate abuts all the cables in the circular cylindrical portion fitted with the pressing plate, or the second pressing plate abuts all the cables in the circular cylindrical portion fitted with the pressing plate.
Through the arrangement, the plurality of wind energy cables are clamped into a whole through the plurality of clamping devices, so that the strength of the whole is higher, and the damage caused by contact friction between the surfaces of the wind energy cables is avoided. To ensure the effect, adjacent clamping devices may be spaced apart by 0.5-1 meter or about 1 meter. And as shown in the figure, locking is carried out through a locking bolt and a locking nut, when the diameter of the cable in the vertical through groove is large, the second extrusion plate is abutted against each cable, and when the diameter of the cable in the vertical through groove is small, the first extrusion plate is abutted against each cable. The first extrusion plate and the second extrusion plate are matched with the elastic gasket, so that the cable cannot slide in the vertical through groove due to the friction force generated by large extrusion force.
The detection cable is characterized by further comprising a controller and a wireless communication unit, a fixing support and a fixing block are fixedly connected to the cylindrical part of the circular ring, the fixing block is provided with a through hole, a detection cable penetrates through the through hole, a temperature sensor is arranged on the upper surface of the circular plate, a fan unit is fixedly connected to the lower surface of the circular plate through the fan support, an installation groove is formed in the upper surface of the fixing block, a laser emitter is arranged in the installation groove, a photoreceiver is arranged on the lower surface of the fixing block, a power transmission line and a signal transmission line are arranged in the detection cable, and the detection cable can supply power to the fan unit, the temperature sensor, the excitation emitter and the photoreceiver and can transmit signals of the temperature; the controller controls all the excitation transmitters and all the light receivers to be closed in a non-detection mode, and when the measured value of a certain temperature sensor is greater than a temperature set threshold value, the fan unit of the clamping unit where the temperature sensor is located is in an on state, and when the measured value of the certain temperature sensor is less than or equal to the temperature set threshold value, the fan unit of the clamping unit where the temperature sensor is located is in an off state; in a detection mode, all fans, all laser transmitters and all optical receivers are turned on, the detection mode lasts for a set time, and in the set time, when more than one optical receiver does not receive the optical signal of the laser transmitter at a certain moment, the wireless communication unit is controlled to transmit a first alarm signal.
Further, the controller stores the number information of each clamping device, all fans, all laser transmitters and all optical receivers are enabled to be started in a detection mode, the detection mode lasts for a set time, and in the set time, when a certain optical receiver does not receive the optical signal of the laser transmitter at a certain moment, the wireless communication unit is controlled to transmit the number information of the clamping device corresponding to the optical receiver.
Fix each clamping device on the lateral wall side of wind tower through the fixed bolster to make the cable can not rock, it is more stable. When the clamping device is installed, the sizes of the fixing brackets of the clamping devices are not necessarily identical, and the sizes of the fixing brackets can be selected to be proper, so that the laser emitter of the fixing block of each clamping device is just aligned with the light receiver of the fixing block of the clamping device above the laser emitter after the installation is finished. Normally, the light emitted by the laser emitter is just received by the above light receiver, and although the wind tower also shakes at a small angle in the use process, the light emitted by the laser emitter is just received by the above light receiver on the basis of a straight line due to the small distance between the two adjacent clamping devices. However, as the service time increases, looseness or even falling between the fixing support and the side wall of the wind tower is easy to occur, in order to detect whether the situation exists, a detection mode is designed, in the detection mode, all fans (the purpose of opening the fans is to increase the blowing effect, when the situation exists that the fixing support and the side wall of the wind tower fall, the clamping devices can shake under the action of the airflow of the fans, so that which clamping device falls is easy to detect), all laser transmitters and all light receivers are all opened, the detection mode lasts for a set time, and in the set time, when more than one light receiver does not receive the light signal of the laser transmitter at a certain moment, the wireless communication unit is controlled to transmit a first alarm signal. Since the wind tower itself has a certain sloshing when the ambient wind is strong, the detection mode is preferably performed in a weather where the ambient wind is small. In the non-detection mode, because wind energy cable transmission electric power can lead to generating heat, consequently when the temperature is higher, the automatic start fan dispels the heat, avoids the heat can not in time dispel the bad consequence that brings.
Preferably, there are 2 elastomeric gaskets between each through-hole and the test cable passing therethrough. 8 vertical through grooves of the circular cylindrical part are formed; there are 8 wind energy cables. An elastic gasket with an arc-shaped section is arranged in each vertical through groove. All laser transmitters are identical and all photoreceivers are identical.
Furthermore, the lower surface of each second extrusion plate is connected with a compression spring, the bottom end of each compression spring is fixed with a pressing block, and the upper surface of each circular plate is provided with a pressure sensor extruded by the pressing block; the detection cable supplies power to the pressure sensor and transmits signals; the controller controls the wireless communication unit to transmit a second alarm signal when the measured value of more than one pressure sensor is smaller than the pressure set threshold value.
Further, the controller stores the number information of each clamping device, controls the controller, and enables the wireless communication unit to transmit the number information of the clamping device corresponding to a certain pressure sensor when the measured value of the pressure sensor is smaller than a pressure setting threshold value.
Because the situation that the locking nut is loosened and even falls off exists after the locking nut is used for a long time, the pressure sensor is designed, and when the locking nut is loosened or falls off, an alarm can be given in time. Of course, the pressure setting threshold is not the same for cables of different diameters.
Preferably, the wind energy cable is just above-mentioned cable, the cable includes oversheath, armor, outer fire-retardant layer and outer insulating layer from outside to inside in proper order, the support element has in the outer insulating layer, the support element includes that center tube and 3 cross-sections are curved arc unit, the arc unit is curved slice for the cross-section that extends along cable length direction, is connected with the linkage unit between every arc unit and the center tube, a plurality of withstand voltage pipes of the outside fixedly connected with of arc unit, the stretch-proofing rope has in the center tube, 3 cable conductor have in the outer insulating layer, cable conductor includes conductor, inner insulating layer, shielding layer, inner fire-retardant layer and inner sheath from inside to outside.
Has the advantages that: the tensile rope and the supporting part are arranged in the cable, and the supporting part is provided with a plurality of pressure resisting pipes, so that the tensile property of the cable is good. And because the supporting part is provided with a plurality of arc-shaped units, the damage to the cable core wire in the cable is less in the twisting process.
Drawings
FIG. 1 is a schematic cross-sectional view of a cable;
FIG. 2 is a schematic view of the cylindrical portion of the ring, the tie bars and the circular plate when the extrusion apparatus is not installed;
FIG. 3 is a schematic cross-sectional view of the connection of the cylindrical portion of the ring, the connecting ribs and the circular plate;
FIG. 4 is a schematic top view of the clamping device when the pressing device is installed;
FIG. 5 is a schematic view of a second stripper plate squeezing the cable;
FIG. 6 is a schematic view of a first stripper plate squeezing a cable;
fig. 7 is a schematic view of a plurality of clamping devices and a plurality of cables engaged.
Detailed Description
10 a wind energy cable; 11 a tensile cord; 11.1 central tube; 11.2 a connection unit; 11.3 arc-shaped units; 11.4 pressure resistant tubing; 12.1 an outer insulating layer; 12.2 an outer flame retardant layer; 12.3 an armor layer; 12.4 outer sheath; 13.1 a conductor; 13.2 an inner insulating layer; 13.3 a shielding layer; 13.4 inner flame retardant layer; 13.5 inner sheath; 1 a circular cylindrical portion; 1.1 elastic pad; 1.2 connecting ribs; 1.3 circular plates; 1.4 third vias; 1.5 locking the nut; 1.6 a first stripper plate; 1.7 a second stripper plate; 1.8 connecting the cylinder; 1.9 locking bolts; 2.1 compressing the spring; 2.2 briquetting; 2.3 a pressure sensor; 3, fixing a bracket; 4, fixing blocks; 4.1 laser emitter; 4.2 an optical receiver; 4.3 through holes; 4.4 elastic washer; 6.1 temperature sensor; 6.2 a fan bracket; 6.3 a fan unit; 20 detect the cable.
The utility model provides a cable, includes oversheath 12.4, armor 12.3, outer flame retardant coating 12.2 and outer insulating layer 12.1 from outside to inside in proper order, the support element has in the outer insulating layer, the support element includes that center tube 11.1 and 3 cross-sections are curved arc unit 11.3, the cross-section that the arc unit extends for following cable length direction is curved slice, is connected with linkage unit 11.2 between every arc unit and the center tube, a plurality of withstand voltage pipes of outside fixedly connected with of arc unit 11.4, the intraductal tensile rope 11 that has of center, 3 cable conductor have in the outer insulating layer, the cable conductor includes conductor 13.1, inner insulating layer 13.2, shielding layer 13.3, inner flame retardant coating 13.4 and inner sheath 13.5 from inside to outside.
The connecting unit has 3, and 1 arc unit of each connecting unit connection and center tube, the connecting unit is the slice that extends along cable length direction. The 3 cable cores and the 3 connecting units are alternately distributed at intervals, and the cable cores are closer to the central tube relative to the arc-shaped units. The outer flame-retardant layer is a flame-retardant PVC belt. The outer and inner sheaths are made of polyethylene material. The armor layer is a steel wire armor layer. The pressure-resistant pipe is made of rubber.
The tensile rope and the supporting part are arranged in the cable, and the supporting part is provided with a plurality of pressure resisting pipes, so that the tensile property of the cable is good. And because the supporting part is provided with a plurality of arc-shaped units, the damage to the cable core wire in the cable is less in the twisting process. Each cable core wire is provided with an inner insulating layer and an inner flame-retardant layer, and the periphery of the cable is also provided with an outer flame-retardant layer and an outer insulating layer, so that the whole flame-retardant insulating effect is good. In the twisting process of the cable, even if the supporting unit is twisted, the twisting degree of each cable core wire is very small, so that the cable can be stretched and twisted for a long time in the process of using in the wind tower and is not easy to damage.
While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.
Claims (4)
1. A stretch-resistant and torsion-resistant wind energy cable for wind power generation is characterized by comprising a controller, a wireless communication unit, a plurality of clamping devices and a plurality of wind energy cable bodies, wherein each clamping device comprises a circular cylindrical part, an extrusion device, a locking bolt and a locking nut, the circular cylindrical part is connected with a circular plate through a plurality of connecting ribs, each extrusion device comprises a first extrusion plate, a second extrusion plate and a connecting cylinder for connecting the first extrusion plate and the second extrusion plate, the cross sections of the first extrusion plate and the second extrusion plate are circular, both sides of the longitudinal section of the first extrusion plate and the longitudinal section of the second extrusion plate are arc-shaped, the maximum outer diameter of the first extrusion plate is larger than that of the second extrusion plate, the first extrusion plate is fixedly connected with the top of the connecting cylinder, the second extrusion plate is fixedly connected with the bottom of the connecting cylinder, the first extrusion plate is provided with a first through hole, the second extrusion plate is provided with a second through hole, the circular plate is provided with a third through hole, and the bolt passes through the first through hole, the connecting cylinder, the second through hole and the third through hole and is locked with the locking nut; the inner side of the circular cylindrical part is provided with a plurality of vertical through grooves with arc-shaped sections, and each vertical through groove is penetrated by one wind energy cable body; the first extrusion plate abuts against all cables in the circular cylindrical part matched with the extrusion plate, or the second extrusion plate abuts against all cables in the circular cylindrical part matched with the extrusion plate; the circular cylindrical part is fixedly connected with a fixing support and a fixing block, the fixing block is provided with a through hole, a detection cable penetrates through the through hole, the upper surface of the circular plate is provided with a temperature sensor, the lower surface of the circular plate is fixedly connected with a fan unit through the fan support, the upper surface of the fixing block is provided with an installation groove, a laser emitter is arranged in the installation groove, the lower surface of the fixing block is provided with a photoreceiver, a power transmission line and a signal transmission line are arranged in the detection cable, and the detection cable can supply power for the fan unit, the temperature sensor, the excitation emitter and the photoreceiver and can transmit signals of the temperature sensor and the photoreceiver; the controller controls all the excitation transmitters and all the light receivers to be closed in a non-detection mode, and when the measured value of a certain temperature sensor is greater than a temperature set threshold value, the fan unit of the clamping unit where the temperature sensor is located is in an on state, and when the measured value of the certain temperature sensor is less than or equal to the temperature set threshold value, the fan unit of the clamping unit where the temperature sensor is located is in an off state; in a detection mode, all fans, all laser transmitters and all optical receivers are started, the detection mode lasts for a set time, and in the set time, when more than one optical receiver does not receive the optical signal of the laser transmitter at a certain moment, the wireless communication unit is controlled to transmit a first alarm signal; the wind energy cable body sequentially comprises an outer sheath, an armor layer, an outer flame-retardant layer and an outer insulating layer from outside to inside, wherein a supporting unit is arranged in the outer insulating layer, the supporting unit comprises a central pipe and 3 arc-shaped units with arc-shaped sections, the arc-shaped units are arc-shaped sheets with the sections extending along the length direction of the cable, a connecting unit is connected between each arc-shaped unit and the central pipe, a plurality of pressure-resistant pipes are fixedly connected to the outer sides of the arc-shaped units, a tensile rope is arranged in the central pipe, 3 cable core wires are arranged in the outer insulating layer, and each cable core wire comprises a conductor, an inner insulating layer, a shielding layer, an inner flame-retardant layer and an inner sheath from inside to outside; the number of the connecting units is 3, each connecting unit is connected with 1 arc-shaped unit and the central tube, and the connecting units are sheets extending along the length direction of the cable; the 3 cable cores and the 3 connecting units are alternately distributed at intervals, and the cable cores are closer to the central tube relative to the arc-shaped units; the pressure-resistant pipe is made of rubber.
2. The stretch-resistant torsion-resistant wind energy cable for wind power generation according to claim 1, wherein the outer flame retardant layer is a flame-retardant PVC tape.
3. The stretch-resistant and torsion-resistant wind energy cable for wind power generation according to claim 1, wherein the outer sheath and the inner sheath are made of a polyethylene material.
4. The stretch-resistant and torsion-resistant wind energy cable for wind power generation according to claim 1, wherein the armor layer is a steel wire armor layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766822.9A CN109003722B (en) | 2018-07-13 | 2018-07-13 | Stretch-resistant and torsion-resistant wind energy cable for wind power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810766822.9A CN109003722B (en) | 2018-07-13 | 2018-07-13 | Stretch-resistant and torsion-resistant wind energy cable for wind power generation |
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| Publication Number | Publication Date |
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| CN109003722A CN109003722A (en) | 2018-12-14 |
| CN109003722B true CN109003722B (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810766822.9A Active CN109003722B (en) | 2018-07-13 | 2018-07-13 | Stretch-resistant and torsion-resistant wind energy cable for wind power generation |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109949979B (en) * | 2019-02-25 | 2024-04-12 | 高邮市鼎天高分子材料有限公司 | High-flame-retardance high-insulation pressure-resistant cable |
| CN110504066B (en) * | 2019-09-03 | 2020-08-14 | 安徽凌宇电缆科技有限公司 | Intelligent anti-interference low-smoke halogen-free flame-retardant loadable monitoring type medium-voltage cable |
| CN111755150A (en) * | 2020-07-13 | 2020-10-09 | 安徽渡江电缆集团有限公司 | Flat type torsion-resistant silicone rubber cable |
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| CN104184093A (en) * | 2014-08-25 | 2014-12-03 | 国家电网公司 | Protective device capable of prolonging service life of electric pole cables |
| CN205212394U (en) * | 2015-12-16 | 2016-05-04 | 北京金风科创风电设备有限公司 | A cable protector and wind generating set for wind generating set |
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| CN105006294B (en) * | 2015-08-12 | 2017-12-29 | 国网山东省电力公司临沂供电公司 | Low voltage power cables |
| CN206098043U (en) * | 2016-10-31 | 2017-04-12 | 国能电缆有限责任公司 | High reliability resistance to compression communication cable |
| CN206312630U (en) * | 2016-11-09 | 2017-07-07 | 云南多宝电缆集团股份有限公司 | A kind of fire resistance composite cotton covered wire |
| CN206497752U (en) * | 2016-12-30 | 2017-09-15 | 天长市徽宁电器仪表厂 | A kind of tensile type antinoise signal interference pressure gauge special load detection cable |
| CN207182954U (en) * | 2017-09-20 | 2018-04-03 | 四川鑫川缆线制造有限公司 | Polyvinyl chloride butyronitrile insulated cable |
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| CN104184093A (en) * | 2014-08-25 | 2014-12-03 | 国家电网公司 | Protective device capable of prolonging service life of electric pole cables |
| CN205212394U (en) * | 2015-12-16 | 2016-05-04 | 北京金风科创风电设备有限公司 | A cable protector and wind generating set for wind generating set |
| CN106653207A (en) * | 2016-12-08 | 2017-05-10 | 中国海洋石油总公司 | Cable cooling device with overheat alarming function |
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| CN109003722A (en) | 2018-12-14 |
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