CN109066548B - Connecting structure of power transmission line and wall bushing - Google Patents
Connecting structure of power transmission line and wall bushing Download PDFInfo
- Publication number
- CN109066548B CN109066548B CN201810858480.3A CN201810858480A CN109066548B CN 109066548 B CN109066548 B CN 109066548B CN 201810858480 A CN201810858480 A CN 201810858480A CN 109066548 B CN109066548 B CN 109066548B
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- wall bushing
- connecting rod
- tube
- insulating
- adapter
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 26
- 238000009413 insulation Methods 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 11
- 210000000078 claw Anatomy 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
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- Insulators (AREA)
Abstract
The invention relates to the technical field of high-voltage power transmission, and particularly provides a connecting structure of a power transmission line and a wall bushing. The insulating adapter is relatively fixed with the wall bushing, and the insulating adapter supports the tubular bus to ensure that the tubular bus is not directly connected with the outgoing line, the external force transmitted to the tubular bus from the outgoing line can be transmitted to the insulating adapter, and the insulating adapter supports the tubular bus to ensure that the tubular bus cannot swing under the influence of the external force. The damage of external force to the tube bus and the wall bushing is reduced, and the influence of the external force on the wiring between the power grid and the converter station is reduced.
Description
Technical Field
The invention relates to the technical field of high-voltage power transmission, in particular to a connecting structure of a power transmission line and a wall bushing.
Background
The converter station is a station for converting direct current into alternating current or converting alternating current into direct current in an extra-high voltage direct current transmission system, in the outlet of an extra-high voltage converter station polar line, an outlet tower is generally adopted to directly lead a wire to be connected to a terminal of a through-wall sleeve, but when the wire is subjected to external forces such as wind power or earthquake, the wire can be led out and swing on a transmission line, the connection structure of the wire is damaged, on one hand, flashover burning of the wire can be caused, and even the wire can be broken; on the other hand, the swing of the lead can drive the wall bushing to move, so that the wall bushing is damaged, and production accidents are caused.
In the prior art, a technician sets a bridging overflowing fitting between a wall bushing and a pipe bus, as disclosed in patent document with the publication number of CN202268606U, between the wall bushing and the pipe bus of a converter station, the bridging overflowing fitting includes a hoop correspondingly hooped at one end of the wall bushing and the pipe bus, a drainage wire is connected to the hoop through a welding process, the wall bushing and the pipe bus are electrically connected through the hoop, the bridging overflowing fitting not only forms the electrical connection between the wall bushing and the pipe bus, but also sets a structure for mechanically supporting the wall bushing and the pipe bus between the wall bushing and the pipe bus, the structure includes a universal structure set between the wall bushing and the pipe bus, the universal structure includes a hinge seat forming a universal joint and a connecting rod hinged with the hinge seat to rotate around the hinge seat, the hinge seat is set on the end of the wall bushing, the other end that the articulated seat was kept away from to the connecting rod wears to establish in the pipe is female to penetrate at the connecting rod and be provided with the female inner wall sliding fit's of pipe slip claw dish on the part in the pipe, connecting rod and slip claw dish can slide at the pipe is female, and connecting rod and slip claw dish can support the pipe female.
When the lead is influenced by external force and swings, the lead can form directional wave motion, and external force is transmitted to the wall-penetrating sleeve and the pipe nut connected with the lead, so that the wall-penetrating sleeve and the pipe nut also swing together. But there are problems in that: although the jumper connection overcurrent hardware fitting can reduce the impact of external force on the wall bushing and the pipe nut, the external force can directly act on the wall bushing, and particularly for some extra-high voltage transmission projects using transmission conductors with large size and heavy weight, the destructiveness of conductor swing on the wall bushing and the pipe nut is particularly strong, and the operation safety of the projects is seriously threatened.
Disclosure of Invention
The invention aims to provide a connection structure of a power transmission line and a wall bushing, which can solve the problem that external force damages the wall bushing in the prior art.
In order to achieve the purpose, the connecting structure of the power transmission line and the wall bushing adopts the following technical scheme:
the connecting structure of the power transmission line and the through-wall sleeve comprises a lead-out line used for being connected with the power transmission line, wherein the lead-out line is connected with the through-wall sleeve through a pipe nut, an insulating adapter used for realizing the conduction of the lead-out line and the pipe nut is arranged between the lead-out line and the pipe nut, the insulating adapter and the through-wall sleeve are relatively fixed, and a pipe nut end connected with the pipe nut and a lead-out line end connected with the lead-out line are arranged on the insulating adapter respectively.
The beneficial effects are that: the insulating adapter is relatively fixed with the wall bushing, and the insulating adapter supports the tubular bus to ensure that the tubular bus is not directly connected with the outgoing line, the external force transmitted to the tubular bus from the outgoing line can be transmitted to the insulating adapter, and the insulating adapter supports the tubular bus to ensure that the tubular bus cannot swing under the influence of the external force. The damage of external force to the tube bus and the wall bushing is reduced, the stability of wiring between the power grid and the converter station is improved, and the influence of the external force on the wiring between the power grid and the converter station is reduced.
Further, the insulating adapter comprises a support which is arranged on the bottom surface of the insulating adapter and formed by insulator combination.
The beneficial effects are that: the insulating support column is arranged on the bottom surface of the insulating adapter, so that the insulating strength of the insulating adapter can be improved, and the safety of the connecting structure of the insulating adapter and the power transmission line and the wall bushing is improved.
Furthermore, a shielding structure is arranged between the insulators.
Furthermore, at least one of the insulation adapter and the tube bus and the wall bushing is movably connected.
The beneficial effects are that: the movable connecting structures are arranged between the insulating adapter and the tube bus and between the tube bus and the wall bushing, so that the external force can be released through the movable connecting structures when the insulating adapter, the tube bus and the wall bushing are subjected to the external force, and the influence of the external force on the strength of the insulating adapter, the tube bus and the wall bushing is reduced.
Further, be equipped with the connecting rod that realizes insulating adapter and the female swing joint of pipe between female and the insulating adapter of pipe, connecting rod one end and insulating adapter rotation assembly, the other end wears to establish in female and with the female inner wall guide fit of pipe, realize the electricity through flexible connecting line between female end of pipe and the female pipe and be connected.
The beneficial effects are that: because the connecting rod is the rotation assembly with insulating adapter, when wall bushing and tub mother are rotating, the torsion that acts on wall bushing and tub mother can be through the rotatory release of pin joint of rotation assembly, has reduced the impact to insulating adapter, has reduced wall bushing and tub mother receive when compelling the swing draw, press, the damage that torsion led to the fact.
Furthermore, the connecting rod is rotatably assembled with the insulating adapter through a universal joint.
The beneficial effects are that: through universal joint and insulating adapter rotation assembly, make the connecting rod have bigger motion angle and motion space to torsion can release sooner, also can be released more evenly.
Furthermore, the end part of the tube nut is provided with an anti-falling plate for preventing the connecting rod from falling out of the tube nut, the connecting rod is provided with a stopping part in stopping fit with the anti-falling plate, the anti-falling plate is provided with a through hole for the connecting rod to penetrate through, and the through hole is provided with an insulating block for isolating the connecting rod from the tube nut.
The beneficial effects are that: be provided with the insulating block and can guarantee the electrical isolation between female and the connecting rod of pipe, avoid shunting from the contact site of female and connecting rod of pipe.
Furthermore, a ball hinge structure for movably connecting the pipe bus and the wall bushing is arranged between the pipe bus and the wall bushing, the ball hinge structure comprises an insulating ball head and a ball seat matched with the insulating ball head, the insulating ball head is fixed at one end of the pipe bus close to the wall bushing through a fixing rod, and the ball seat is fixed at one end of the wall bushing close to the pipe bus through a support.
The beneficial effects are that: the spherical hinge structure is arranged between the pipe nut and the wall bushing, the resistance of the spherical hinge structure is smaller when the spherical hinge structure rotates, the relative motion of the pipe nut and the wall bushing is smoother, and the influence caused by external force is reduced.
Drawings
FIG. 1 is a schematic structural view of a connection structure of a power transmission line and a wall bushing according to the present invention;
FIG. 2 is a schematic structural diagram of a pillar of the insulating adapter of the present invention;
FIG. 3 is a side view of the insulating adapter of the present invention;
FIG. 4 is a top view of the insulating adapter of the present invention;
FIG. 5 is an enlarged view of a portion of the insulating adapter of the present invention;
FIG. 6 is a schematic view of the connection structure of the pipe nut and the wall bushing according to the present invention;
fig. 7 is a schematic structural view of a cross-over current fitting between a tube bus and a wall bushing in the invention.
In the figure: 1. a power transmission tower; 2. a power transmission line; 3. an outgoing line; 4. an insulating adapter; 41. a pipe female end; 42. an outgoing line end; 43. a grading ring; 44. a universal joint; 45. a rain cover; 46. a connecting rod; 47. an insulating support; 48. a flexible wire; 49. an anti-drop plate; 491. an insulating block; 5. a pipe nut; 6. a wall bushing; 7. bridging an overcurrent fitting; 71. fixing the rod; 72. an insulating bulb; 73. a nut; 74. a pin shaft; 75. a concave support block; 76. a soft copper strip; 77. an upper bracket; 78. a lower bracket; 8. a pillar; 81. a top grading ring; 82. a middle grading ring; 83. an insulator connecting rod.
Detailed Description
The present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present invention provides an embodiment of a connection structure for a power line and a wall bushing: the connection structure of the transmission line and the wall bushing is used between an ultra-high voltage power grid and a converter station, a lead-out line 3 is led downwards into the transmission line 2 on a transmission tower 1, the lead-out line 3 is used for leading voltage into the converter station, the structure of the outward lead-out line of the converter station comprises the wall bushing 6 and a pipe nut 5 connected with the wall bushing 6, and a cross-over overcurrent fitting 7 for reducing the influence of external force on the wall bushing 6 and the pipe nut 5 is further arranged between the wall bushing 6 and the pipe nut 5. An insulating adapter is arranged between the outgoing line 3 and the tube bus 5, the position of the insulating adapter 4 is relatively fixed with the wall bushing 6, and the tube bus 5 is supported, so that the tube bus 5 is not directly connected with the outgoing line 3, the external force transmitted from the outgoing line 3 to the tube bus 5 can be transmitted to the insulating adapter 4, and the insulating adapter 4 supports the tube bus 5, so that the tube bus 5 cannot swing due to the influence of the external force. The stability of the wiring between the power grid and the converter station is improved, and the influence of external force on the wiring between the power grid and the converter station is reduced.
The bottom surface of the insulating adapter 4 is provided with a support column 8 formed by an insulator combination, the height of the support column 8 is changed according to the strength of a power grid, the higher the strength of the power grid is, the higher the required insulation degree is, and the higher the height of the support column 8 is. The support post 8 arranged below the insulating adapter 4 comprises six branches, each branch is formed by a plurality of stacked insulators, and an insulator connecting rod 83 for improving the overall strength of the support post 8 is arranged between the branches formed by the insulator combination, so that the requirement of supporting heavy load can be met. Further, a top equalizing ring 81 as a shielding structure is provided on the top of the pillar 8, and a middle equalizing ring 82 as a shielding structure is provided in the middle of the pillar 8.
At least one of the positions between the insulating adapter 4 and the tube bus 5 and between the tube bus 5 and the wall bushing 6 is movably connected. The insulating adapter 4 should form an electrical connection structure between the outgoing line 3 and the tube bus 5, and support the tube bus 5 to prevent the tube bus 5 from swinging due to external force, so that the insulating adapter 4 is provided with a support structure for supporting the tube bus 5 and a wiring terminal for communicating the outgoing line 3 with the tube bus 5. The terminal is fixed and cannot swing under the influence of external force. The wiring terminal comprises a tube bus end 41 communicated with the tube bus 5 and a lead-out wire end 42 communicated with the lead-out wire 3, the tube bus end 41 is arranged on the side face of the insulating adapter 4, the lead-out wire end 42 is arranged on the top face of the insulating adapter 4, and a common lead-out wire clamp is adopted. The rainproof cover 45 for surrounding the insulating adapter 4 is arranged on the outer side of the insulating adapter 4, and the equalizing rings 43 are arranged on the top of the insulating adapter 4 and the bottom of the insulating adapter 4, so that the electric field of the insulating adapter 4 is more uniform in work.
The support structure of the support tube bus 5 comprises a connecting rod 46 arranged between the insulating adapter 4 and one end, close to the insulating adapter 4, of the tube bus 5, one end of the connecting rod 46 penetrates through the tube bus 5, and the other end of the connecting rod is rotatably assembled with the insulating adapter 4. Because the inside of the tube nut 5 is of a hollow structure, the connecting rod 46 penetrates through the tube nut 5 and can move relative to the tube nut 5, so that the relative sliding between the tube nut 5 and the connecting rod 46 and the insulating adapter 4 is realized, the other end of the connecting rod 46 can rotate, the action between the tube nut 5 and the insulating adapter 4 is less limited, and the smooth connection between the tube nut 5 and the insulating adapter 4 can be realized.
The universal joint 44 is arranged on the insulating adapter 4 and connected with the connecting rod 46, the connecting rod 46 can swing, one end of the connecting rod 46 penetrating through the tube bus 5 is provided with an insulating support 47 which is matched with the inner wall of the tube bus 5 in a guiding way when the connecting rod 46 slides, the insulating support 47 is provided with a plurality of support claws contacted with the inner wall of the tube bus 5, an anti-drop plate 49 for preventing the connecting rod 46 from dropping out of the tube bus 5 in the action process is arranged at an opening of the tube bus 5 for the connecting rod 46 to extend into, and the insulating support 47 arranged at the end part of the connecting rod 46 can be matched with the anti-drop plate 49 in a blocking way, so that the insulating support 47 forms a blocking structure of the connecting rod 46. The provision of only one insulating support 47 at the end of the connecting rod 46 enables the simultaneous support and stop-fit function. In order to ensure electrical isolation between the tube nut 5 and the connecting rod 46 and avoid shunting from the contact portion between the tube nut 5 and the connecting rod 46, an insulating block 491 for guiding the movement of the connecting rod 46 and isolating the connecting rod 46 from the retaining plate 49 is provided in the through hole of the retaining plate 49 into which the connecting rod 46 is inserted. The movable connection between the tube bus 5 and the insulating adapter 4 can be realized through the connecting rod 46, the resistance force limiting the movement of the tube bus 5 and the wall bushing 6 when the tube bus 5 and the wall bushing 6 swing under the influence of wind power or other external force is reduced, and therefore the damage to the tube bus 5 and the wall bushing 6 is reduced. In addition, a flexible conductor 48 serving as a flexible connecting line and communicating the tube bus 5 with the terminal is connected between the tube bus end 41 of the insulating adapter 4 and the tube bus 5, on one hand, the flexible conductor 48 can deform along with the motion of the tube bus 5, the tube bus 5 cannot be restrained, damage to the tube bus 5 and the wall bushing 6 is reduced, and the flexible conductor 48 can meet the technical requirement of forming electrical connection when the tube bus 5 expands with heat and contracts with cold.
Still be provided with the cross-over between wall bushing 6 and the tubular bus 5 and flow over gold utensil 7, can reduce the influence of external force to wall bushing 6 and tubular bus 5, the cross-over flows over gold utensil 7 and includes a plurality of soft copper strips 76 that set up between wall bushing 6 and tubular bus 5, and the effect of soft copper strip 76 is similar with the effect of above-mentioned soft wire 48. The wall bushing 6 is provided with a concave supporting block 75 forming a ball seat, one end of the pipe nut 5 is provided with a fixed rod 71, the end of the fixed rod 71 is provided with an insulating ball 72 which is matched with the concave supporting block 75 to form a spherical hinge structure, the insulating ball 72 is fixed on the fixed rod 71 through a nut 73, and the end of the fixed rod 71 is also provided with a pin shaft 74 which is anti-loose and anti-dropping. An upper bracket 77 is arranged on the concave supporting block 75, and a lower bracket 78 matched with the upper bracket 77 is correspondingly arranged on the wall bushing 6, and the upper bracket and the lower bracket are combined to form a bracket for supporting the concave supporting block 75. The cross-over current fitting 7 is arranged between the wall bushing 6 and the tube bus 5, so that the wall bushing 6 and the tube bus 5 can be twisted and rotated, and the influence of external force between the wall bushing 6 and the tube bus 5 is reduced.
In other embodiments, the insulating adapter and the pipe nut may also be fixedly connected, and no longer movably connected. For example, one end of the tube bus close to the insulating adapter is directly and fixedly connected with the insulating adapter to form a form that one end of the tube bus is movably connected with the other end of the tube bus to be fixedly connected, and for the tube bus and the wall bushing, the tube bus and the wall bushing are connected into a whole through a bridging overflowing fitting, the ends far away from each other of the tube bus and the wall bushing are directly fixed, and the tube bus and the wall bushing are movably connected through the bridging overflowing fitting.
In other embodiments, the pipe nut and the wall bushing can also adopt a fixed connection mode, and a movable connection mode is not adopted. For example, one end of the tube nut is directly fixed on the wall bushing, and the other end of the tube nut is movably connected with the insulating adapter.
In other embodiments, the posts disposed on the bottom surface of the insulating adapter may also be formed of a unitary insulating material, rather than being formed of an insulator assembly.
In other embodiments, the insulators forming the posts may be directly connected to each other without providing a shielding structure.
The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. Power transmission line and wall bushing's connection structure, including being used for the lead-out wire of being connected with the power transmission line, the lead-out wire passes through female and wall bushing, its characterized in that: an insulation adapter for realizing conduction between the outgoing line and the tube bus is arranged between the outgoing line and the tube bus, the insulation adapter is relatively fixed with the wall bushing, and a tube bus end connected with the tube bus and an outgoing line end connected with the outgoing line are arranged on the insulation adapter respectively; the insulation adapter is also provided with a support structure for supporting the tube nut, the support structure comprises a connecting rod, one end of the connecting rod is arranged in the tube nut in a penetrating mode and can move relative to the tube nut, the other end of the connecting rod is assembled with the insulation adapter in a rotating mode, an insulation support which is matched with the inner wall of the tube nut in a guiding mode when the connecting rod slides is arranged at one end of the connecting rod arranged in the tube nut in a penetrating mode, the insulation support is provided with a plurality of supporting claws which are contacted with the inner wall of the tube nut, an anti-falling plate for preventing the connecting rod from falling out of the tube nut in the action process is arranged at an opening, into which the connecting rod extends, of the tube nut, the insulation support arranged at the end portion of the connecting rod can be matched with the anti-falling plate in a blocking mode, a through hole for the connecting rod to penetrate through; a flexible lead is connected between the tube bus end of the insulation adapter and the tube bus; be equipped with the cross-over connection and flow over the gold utensil between wall bushing and pipe mother, the cross-over connection overflows the gold utensil and includes a plurality of soft copper strips that set up between wall bushing and pipe mother, be provided with the spill supporting shoe that forms the ball seat on the wall bushing, one end at the pipe mother is provided with the dead lever, be provided with the insulating bulb that forms the ball pivot structure with the spill supporting shoe cooperation on the end of dead lever, insulating bulb passes through the nut and fixes on the dead lever, still wear to be equipped with locking anticreep round pin axle on the end of dead lever, be provided with the upper bracket on the spill supporting shoe, correspondingly be provided with the lower carriage with the upper carriage adaptation on the wall bushing, it is upper, the lower carriage is closed to form the support that supports the spill supporting shoe.
2. A connection structure for a transmission line and a wall bushing according to claim 1, characterized in that: the insulating adapter comprises a support which is arranged on the bottom surface of the insulating adapter and formed by insulator combination.
3. A connection structure for a transmission line and a wall bushing according to claim 2, characterized in that: and a shielding structure is arranged between the insulators.
4. A connection structure for a transmission line and a wall bushing according to claim 1, characterized in that: the connecting rod is rotatably assembled with the insulating adapter through a universal joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810858480.3A CN109066548B (en) | 2018-07-31 | 2018-07-31 | Connecting structure of power transmission line and wall bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810858480.3A CN109066548B (en) | 2018-07-31 | 2018-07-31 | Connecting structure of power transmission line and wall bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109066548A CN109066548A (en) | 2018-12-21 |
| CN109066548B true CN109066548B (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810858480.3A Active CN109066548B (en) | 2018-07-31 | 2018-07-31 | Connecting structure of power transmission line and wall bushing |
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| CN (1) | CN109066548B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114825226A (en) * | 2022-06-07 | 2022-07-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Wall bushing structure of direct current valve hall |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010166738A (en) * | 2009-01-16 | 2010-07-29 | Kyodo Ky Tec Corp | Wall penetrating structure for bus duct and penetration structure for bus dust |
| CN203607793U (en) * | 2013-11-29 | 2014-05-21 | 国家电网公司 | Tube-bus end part sliding fitting and tube bus |
| CN205178425U (en) * | 2015-11-17 | 2016-04-20 | 国家电网公司 | Special high voltage direct current wall bushing subassembly |
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2018
- 2018-07-31 CN CN201810858480.3A patent/CN109066548B/en active Active
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| CN109066548A (en) | 2018-12-21 |
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