CN210245185U - Windage yaw jumper wire prevention insulator for 500kV transmission line - Google Patents
Windage yaw jumper wire prevention insulator for 500kV transmission line Download PDFInfo
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- CN210245185U CN210245185U CN201921019340.3U CN201921019340U CN210245185U CN 210245185 U CN210245185 U CN 210245185U CN 201921019340 U CN201921019340 U CN 201921019340U CN 210245185 U CN210245185 U CN 210245185U
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Abstract
The utility model relates to a 500kV transmission line is with preventing wind partial patch cord insulator, including core and sheath, be equipped with the full skirt on the sheath, the core includes hollow tube and polyurethane insulator, and the core includes high-pressure side and low-voltage end, and the low-voltage end includes first plug and ring flange, and the high-pressure side includes second plug and connecting plate, the utility model has the advantages of: the core body is set into the hollow tube and the polyurethane insulator, the hollow tube has good insulation level through the polyurethane insulator, the weight of the whole core body can be optimized, the requirement of large bending moment of a vertical fixed wind-deflection-preventing jumper wire insulator string of a 500kV circuit is met, the core body meets the requirements of tracking resistance and creepage distance through the arrangement of the sheath and the umbrella skirt, jumper wire wind deflection flashover of a 500kV power transmission line is avoided, jumper wire cross arm length can be greatly shortened, and therefore steel consumption of an iron tower is reduced.
Description
Technical Field
The utility model relates to a 500kV transmission line is with preventing wind partial jumper wire insulator.
Background
In recent years, current-guiding jumper wires on 500kV power transmission lines in a plurality of regions nationwide cause flashover under the influence of strong wind to cause tripping accidents, the frequency of the tripping accidents exceeds the acceptable limit of safe operation of a power system, and great harm is brought to the safe operation of the power lines. According to statistics, 500kV and above lines governed by the national network company in 2018 have wind-induced partial tripping for more than 100 times, and the range relates to Jiangsu, Zhejiang, Anhui, Hubei, Henan, Shandong, Shanxi, Beijing, Hebei, northeast and the like. The wind bias discharge has wide range, multiple times and great influence, and is most frequent in typhoon and frequent in typhoon areas in coastal regions. Different from lightning flashover and operation impact flashover, most of windage flashover occurs under working voltage, and reclosing generally cannot be successfully carried out, so that line outage is caused, and great loss is caused to national economy. According to the analysis of the recent windage yaw tripping accidents, the reasons for jumper windage yaw flashover mainly include the following points.
Strong winds are the most direct cause of flashover due to windage yaw of the jumper. The traditional jumper string insulator adopts conventional porcelain and glass, the insulator string inclines towards the direction of a tower under the condition that the wind speed exceeds the designed wind speed, the air gap distance between a lead and the tower is reduced, and flashover occurs when the air gap distance cannot meet the minimum discharge voltage requirement; the composite insulator is adopted for line climbing adjustment, and wind deflection check is not carried out, so that discharge can be caused even if the composite insulator is light in self weight and a heavy hammer swings in a large amplitude during wind deflection.
At present, the main solutions are as follows: 1. the windproof stay wire is reinforced, and the stay wire is fixed on a line hardware fitting to fix a lead, so that the windproof stay wire can play a good role in inhibiting wind deflection generated on the line. However, the line hardware is easy to be damaged by fatigue due to the inflexible rotation of windage yaw and long-time stress. Therefore, the windproof stay wire is additionally arranged, so that potential safety hazards exist in the operation of the line; 2. the heavy hammer is additionally arranged, but the effect of the additional arrangement of the heavy hammer is limited, so that the heavy hammer is not a main measure for fundamentally solving the problem of the hanging wind drift flashover; 3. adopting a windage yaw prevention insulator: the insulator has small windage yaw swing amplitude, and the electric clearance between a wire and a tower is increased; the installation is reliable, but the wire wind dances more seriously for 500kV and above lines because of the larger insulation outer dimension.
The 500kV line is still provided with the conventional jumper string due to the limitation of the bending resistance of the composite insulator core rod. The jumper string of the 500kV power transmission line is generally assembled by vertically hanging or additionally hanging a heavy hammer piece at home and abroad, and the assembly mode cannot fundamentally solve the problem of windage yaw flashover of the jumper; and coastal strong wind area probably adopts V type wire jumper cluster equipment mode, because it needs increase a antithetical couplet insulator, the wire jumper cross arm also need lengthen simultaneously to can cause the great increase of investment. Because the jumper string of the 500kV line is long and has large wind load, and the lead is in a four-split form, the vertically fixed wind deflection preventing jumper insulator string can form large bending moment at the fixed position of the iron tower.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is exactly to provide a 500kV transmission line is with preventing wind partially jumper wire insulator, solve current traditional jumper wire insulator and can not adapt to 500kV transmission line's technical problem.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the utility model provides a 500kV transmission line is with preventing windage yaw jumper wire insulator, includes core and the cladding sheath in the core outside, be equipped with the full skirt on the sheath, the core includes hollow tube and the polyurethane insulator of packing in the hollow tube, the core includes high-pressure end and low-voltage end, the low-voltage end includes first plug and ring flange, first plug sets up in the hollow tube, the ring flange sets up on first plug, the high-pressure end includes second plug and connecting plate, the second plug sets up in the hollow tube, the connecting plate sets up on the second plug.
Preferably, quartz sand for ensuring the consistent roughness of the inner wall of the hollow pipe is arranged on the inner wall of the hollow pipe.
Preferably, the first core rod and the second core rod are both injected into the hollow tube by epoxy resin.
Preferably, the shed and the sheath are integrally formed.
Preferably, the outer diameter of the hollow pipe is equal to 100-105 mm, and the wall thickness of the hollow pipe is equal to 10-12 mm.
Preferably, still be equipped with first equalizer ring and second equalizer ring on the high-pressure side, the diameter of first equalizer ring is 365 ~ 375mm, the shielding degree of depth of first equalizer ring is 60 ~ 65mm, the diameter of second equalizer ring is 345 ~ 355mm, the shielding degree of depth of second equalizer ring is 28 ~ 32 mm.
To sum up, the utility model has the advantages that: 1. the core body is arranged into the hollow pipe and the polyurethane insulator, the hollow pipe has good insulation level and can optimize the weight of the whole core body, the requirement of large bending moment of a vertical fixed wind-proof eccentric jumper wire insulator string of a 500kV line is met, the core body meets the requirements of tracking resistance and creepage distance through the arrangement of the polyurethane insulator, jumper wire wind-deflection flashover of the 500kV transmission line is avoided, and jumper wire cross arm length can be greatly shortened, so that steel consumption of an iron tower is reduced, in addition, the low-voltage end is a main bearing part, the low-voltage end is arranged into the first core rod and the flange plate, the flange plate can improve the contact area when the core body is installed, the stress stability is ensured, the strength of the joint of the flange plate and the core body can be improved through the first core rod and the flange plate can be avoided from being separated, and the high-voltage end is connected with the four-split spacing rod, therefore, the high-pressure end is arranged into the second core rod and the connecting plate, and the high-pressure end can be directly connected by the bolt during installation and connection, so that the installation efficiency is improved, the bolt connection is reliable, and the shaking of the joint of the high-pressure end and the four-split spacer is prevented;
2. the arrangement of the quartz sand can ensure the consistent roughness of the inner wall of the hollow pipe, thereby ensuring the good interfacial adhesion of the inner wall of the hollow pipe and improving the filling quality of the polyurethane insulator;
3. the first core rod and the second core rod are injected into the hollow tube through epoxy resin, so that the fixing quality of the first core rod and the second core rod can be improved, and the coaxiality of the first core rod and the second core rod can be ensured;
4. the umbrella skirt and the sheath are integrally formed, so that the mounting process between the umbrella skirt and the sheath can be optimized, and the fixing quality of the umbrella skirt is ensured;
5. the outer diameter of the hollow pipe is equal to 100-105 mm, the wall thickness of the hollow pipe is equal to 10-12 mm, cores of different models can be prepared according to different requirements, the insulation level in the core can be guaranteed, and the weight of the whole wind deflection prevention jumper wire insulator can be reduced;
6. the arrangement of the first equalizing ring and the second equalizing ring enables high voltage at a high-voltage end to be uniformly distributed around the core body, so that the wind deflection preventing jumper wire insulator has good side lightning prevention performance, and the safety performance of the whole insulator is improved.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is the utility model relates to a 500kV transmission line is with structure schematic diagram of prevent wind partial jumper wire insulator.
Reference numerals:
1 core body, 2 sheaths, 3 sheds, 4 hollow pipes, 5 polyurethane insulators, 6 low-voltage ends, 61 first core rods, 62 flange plates, 7 high-voltage ends, 71 second core rods, 72 connecting plates, 73 first equalizing rings, 74 second equalizing rings and 8 epoxy resins.
Detailed Description
As shown in fig. 1, the windage yaw jumper wire insulator for the 500kV transmission line comprises a core body 1 and a sheath 2 coated outside the core body 1, wherein the sheath 2 is provided with a shed 3, the core body 1 comprises a hollow tube 4 and a polyurethane insulator 5 filled in the hollow tube 4, the core body 1 comprises a high-voltage end 7 and a low-voltage end 6, the low-voltage end 6 comprises a first core rod 61 and a flange plate 62, the first core rod 61 is arranged in the hollow tube 4, the flange plate 62 is arranged on the first core rod 61, the high-voltage end 7 comprises a second core rod 71 and a connecting plate 72, the second core rod 71 is arranged in the hollow tube 4, the connecting plate 72 is arranged on the second core rod 71, the core body 1 is arranged into the hollow tube 4 and the polyurethane insulator 5, the hollow tube 4 has a good insulation level through the polyurethane insulator 5, and the weight of the whole core body 1 can be optimized, the requirement of large bending moment of a vertically fixed wind-deflection-preventing jumper wire insulator string of a 500kV line is met, the arrangement of the sheath 2 and the umbrella skirt 3 enables the core body 1 to meet the requirements of tracking resistance and creepage distance, the jumper wire wind-deflection flashover of the 500kV transmission line is avoided, the length of a jumper wire cross arm can be greatly shortened, and the steel consumption of an iron tower is reduced, in addition, the low-voltage end 6 is a main bearing part, the low-voltage end 6 is arranged into the first core rod 61 and the flange plate 62, the flange plate 62 can improve the contact area when the core body 1 is installed, the stress stability is ensured, the first core rod 61 can improve the strength of the joint of the flange plate 62 and the core body 1, the separation of the first core rod 61 and the flange plate 62 is avoided, the high-voltage end 7 is connected with the four-split spacing rod, the high-voltage end 7 is arranged into the second core rod 71 and the connecting plate 72, the bolt connection can, and the bolt connection is reliable, and the shaking of the joint of the high-voltage end 7 and the four-split spacing rod is prevented.
In addition, the quartz sand for ensuring the consistent roughness of the inner wall of the hollow tube 4 is arranged on the inner wall of the hollow tube 4, the consistent roughness of the inner wall of the hollow tube 4 can be ensured, the good interfacial adhesion of the inner wall of the hollow tube 4 is ensured, the filling quality of the polyurethane insulator 5 is improved, the first core rod 61 and the second core rod 71 are both injected into the hollow tube 4 through the epoxy resin 8, the first core rod 61 and the second core rod 71 are injected into the hollow tube 4 through the epoxy resin 8, the fixing quality of the first core rod 61 and the second core rod 71 can be improved, and the coaxiality of the first core rod 61 and the second core rod 71 can be ensured.
The umbrella skirt 3 and the sheath 2 are integrally formed, the mounting process between the umbrella skirt 3 and the sheath 2 can be optimized, the fixing quality of the umbrella skirt 3 is ensured, the outer diameter of the hollow tube 4 is equal to 100mm, the wall thickness of the hollow tube 4 is equal to 10mm, the insulation level in the core body 1 can be ensured, and the weight of the whole anti-wind-bias jumper insulator can be reduced, a first equalizing ring 73 and a second equalizing ring 74 are also arranged on the high-voltage end 7, the diameter of the first equalizing ring 73 is 370mm, the shielding depth of the first equalizing ring 73 is 60mm, the diameter of second equalizer ring 74 is 350mm, the shielding degree of depth of second equalizer ring 74 is 30mm, enables the high pressure evenly distributed of high-pressure end 7 around core 1, enables to prevent wind inclined to one side wire jumper insulator and has good preventing side thunder, improves the security performance of whole insulator.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.
Claims (6)
1. The utility model provides a 500kV transmission line is with preventing windage yaw jumper insulator, includes core and the sheath of cladding in the core outside, be equipped with the full skirt on the sheath, its characterized in that: the core includes hollow tube and the polyurethane insulator of packing in the hollow tube, the core includes high-pressure end and low pressure end, the low pressure end includes first plug and ring flange, first plug sets up in the hollow tube, the ring flange sets up on first plug, the high-pressure end includes second plug and connecting plate, the second plug sets up in the hollow tube, the connecting plate sets up on the second plug.
2. The windage yaw jumper insulator for 500kV transmission lines according to claim 1, characterized in that: and quartz sand for ensuring the consistent roughness of the inner wall of the hollow pipe is arranged on the inner wall of the hollow pipe.
3. The windage yaw jumper insulator for 500kV transmission lines according to claim 1, characterized in that: the first core rod and the second core rod are both injected into the hollow pipe through epoxy resin.
4. The windage yaw jumper insulator for 500kV transmission lines according to claim 1, characterized in that: the umbrella skirt and the sheath are integrally formed.
5. The windage yaw jumper insulator for 500kV transmission lines according to claim 1, characterized in that: the outer diameter of the hollow pipe is equal to 100-105 mm, and the wall thickness of the hollow pipe is equal to 10-12 mm.
6. The windage yaw jumper insulator for 500kV transmission lines according to claim 1, characterized in that: still be equipped with first equalizer ring and second equalizer ring on the high-pressure side, the diameter of first equalizer ring is 365 ~ 375mm, the shielding degree of depth of first equalizer ring is 60 ~ 65mm, the diameter of second equalizer ring is 345 ~ 355mm, the shielding degree of depth of second equalizer ring is 28 ~ 32 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921019340.3U CN210245185U (en) | 2019-07-02 | 2019-07-02 | Windage yaw jumper wire prevention insulator for 500kV transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921019340.3U CN210245185U (en) | 2019-07-02 | 2019-07-02 | Windage yaw jumper wire prevention insulator for 500kV transmission line |
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| CN210245185U true CN210245185U (en) | 2020-04-03 |
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| CN201921019340.3U Active CN210245185U (en) | 2019-07-02 | 2019-07-02 | Windage yaw jumper wire prevention insulator for 500kV transmission line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111326298A (en) * | 2020-04-07 | 2020-06-23 | 华北电力大学（保定） | Inner-filling light extra-high voltage composite insulating cross arm |
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2019
- 2019-07-02 CN CN201921019340.3U patent/CN210245185U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111326298A (en) * | 2020-04-07 | 2020-06-23 | 华北电力大学（保定） | Inner-filling light extra-high voltage composite insulating cross arm |
| CN111326298B (en) * | 2020-04-07 | 2021-11-19 | 华北电力大学（保定） | Inner-filling light extra-high voltage composite insulating cross arm |
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