CN204303479U - One ± 800kV ultrahigh voltage direct current wall bushing - Google Patents
One ± 800kV ultrahigh voltage direct current wall bushing Download PDFInfo
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- CN204303479U CN204303479U CN201420663708.0U CN201420663708U CN204303479U CN 204303479 U CN204303479 U CN 204303479U CN 201420663708 U CN201420663708 U CN 201420663708U CN 204303479 U CN204303479 U CN 204303479U
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Abstract
The utility model discloses one ± 800kV ultrahigh voltage direct current wall bushing, there are two conducting rods, two conducting rod stage casing coaxial lines are set with electric capacity core body, capacitance plate is provided with in described electric capacity core body, this tubular electric capacity core body is set with the sheath that barrel dliameter size is mated with the diameter of section size of this electric capacity core body, the axial both sides of described sheath are respectively installed with the insulating coating that cross section is multi-layer umbrella skirt; Two described insulating coatings are axially respectively installed with flange in inner side, in described flange chamber, described two conducting rod front ends are by connecting extension bar, described conducting rod short-tail end is fixedly connected with innermost layer capacitance plate by hold-down ring, innermost layer capacitance plate exit is copper end ring, at described copper end ring and described hold-down ring, between described hold-down ring and described conducting rod, install equipotential line additional, adopt above structure the utility model to have and prevent partial discharge, reduce equipment failure rate, safe and reliable advantage.
Description
Technical field
The utility model belongs to electrical engineering technical field, particularly one ± 800KV ultrahigh voltage direct current wall bushing.
Background technology
Along with the high speed development of national economy, drive the quick growth of power consumption, thus occur that energy transport and electricity consumption supply are tending towards nervous, result in the transmission of electricity pressure increase of whole electric power system, make to exchange with 500kV and ± 500kV direct current system is the needs that the power transmission network of bulk transmission grid can not meet the national economic development.In order to address this problem, China accelerates the construction of extra-high voltage grid, within 2010, builds up the first bar in the world ± 800kV extra-high voltage direct-current transmission engineering.Ultrahigh voltage direct current wall bushing is ± important electrical of 800kV extra-high voltage direct-current transmission engineering, and it plays a part contact intra-valve hall converter valve and outdoor direct field device in extra-high voltage DC transmission system, possesses and insulate and current capacity to wall.
The first bar in the world ± 800kV extra-high voltage direct-current transmission engineering Chu Sui DC engineering 800kV used ultrahigh voltage direct current wall bushing is that German HSP company (being purchased by Siemens) being ± 800kV extra-high voltage direct-current engineering is researched and developed first, since engineering puts into operation, there is significant deficiency or fault in existing three 800kV ultrahigh voltage direct current wall bushings successively, its fault is traced it to its cause as hold-down ring processing in existing ultrahigh voltage direct current wall bushing and is assembled bad, or transport, vibrations in running, cause between hold-down ring and conducting rod and occur space, cause partial discharge, produce metal dust, metal dust enters high field intensity region, and then cause equipment fault, moreover be exactly that butted part loose contact causes contact resistance excessive, cause heating defect.
Utility model content
The technical problems to be solved in the utility model is to provide and a kind ofly prevents partial discharge, prevent metal dust from entering high field area causes equipment fault, safe and reliable ± 800kV ultrahigh voltage direct current wall bushing.
For solving the problems of the technologies described above, of the present utility model ± 800kV ultrahigh voltage direct current wall bushing, there are two its axial rearward end all with the conducting rod 1 of binding post 2, two conducting rod 1 stage casing coaxial lines are set with the electric capacity core body 3 of a tubular rubber leaching paper structure, capacitance plate 12 is provided with between described electric capacity core body 3 and conducting rod 1, this tubular electric capacity core body 3 is set with the sheath 4 that barrel dliameter size is mated with the diameter of section size of this electric capacity core body, the described axial both sides of sheath 4 are respectively installed with the insulating coating 5 that cross section is multi-layer umbrella skirt, described insulating coating 5 axially outside is set with cover plate 6 and gland 7, the binding post 2 of described conducting rod 1 rear end passes cover plate 6 and gland 7 successively, described gland 7 and described cover plate 6 to be fixedly mounted on described insulating coating 5, described cover plate 6 is also provided with for even binding post 2 Analysis of End Electric Field, prevents the grading ring 8 of corona discharge, two described insulating coatings 5 are axially respectively installed with flange 9 in inner side, two described flange seals are connected to form flange chamber 10, the SF6 gas as main insulation body is filled with in described flange chamber 10, described flange 10 sidewall is provided with charge valve 15, in described flange chamber 10, described two conducting rod 1 front ends are by connecting extension bar 11, described conducting rod 1 short-tail end is fixedly connected with innermost layer capacitance plate 12 by hold-down ring 13, innermost layer capacitance plate 12 exit is copper end ring 14, at described copper end ring 14 and described hold-down ring 13, equipotential line is installed additional between described hold-down ring 13 and described conducting rod 1.
Adopt above structure, due at described copper end ring 14 and described hold-down ring 13, install equipotential line additional between described hold-down ring 13 and described conducting rod 1, copper end ring 14, hold-down ring 13 and conducting rod 1 is made to remain equipotential, solve the problem of partial discharge, thus the probability of device fails is reduced greatly.
As further improvement of the utility model, described watchband-shaped contactor 16 is provided with to extension bar 11 two ends excircle, insert described conducting rod 1 to extension bar 11 two ends to be fixed by described watchband-shaped contactor 16 and described conducting rod 1, described all sealing ring is set with to extension bar 11 before and after described watchband-shaped contactor 16 present position, the metal dust preventing wall bushing from producing in transport or assembling process enters high electric field region, thus has stopped the problem of metal discharge.
For optimizing technical solutions of the utility model, conducting rod 1 inwall of described watchband-shaped contactor 16 mounting groove and correspondence being provided with silver coating, butted part being contacted good, and it is stable to return resistance, solves the problem of sleeve pipe because of time large heating of resistive.
Preferably, outside described hold-down ring 13, install anti-loosening fastening bolt additional, prevent hold-down ring from loosening.
In sum, the utility model has the advantages that: at copper end ring, compress between ring and aluminium conducting rod and install equipotential line additional, make copper end ring, hold-down ring and aluminium conducting rod remain equipotential; Anti-loosening fastening bolt is installed additional outside hold-down ring, prevent hold-down ring from loosening, clamp down on each parts current potential simultaneously, solve the problem of suspended discharge, the good time resistance of butted part contact is simultaneously stable, and the metal dust that transportation produces can not enter high electric field region, therefore greatly reduce the utility model sleeve pipe rate of breakdown, have concurrently safe and reliable simultaneously.
Accompanying drawing explanation
Fig. 1 the utility model overall structure schematic diagram;
Fig. 2 is the utility model butted part partial enlarged drawing;
Fig. 3 is the utility model butted part another part partial enlarged drawing;
Fig. 4 is that the utility model is to extension bar structural representation.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, clearly, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
See Fig. 1 to Fig. 4, of the present utility model ± 800kV ultrahigh voltage direct current wall bushing, there are two its axial rearward end all with the conducting rod 1 of binding post 2, two conducting rod 1 stage casing coaxial lines are set with the electric capacity core body 3 of a tubular rubber leaching paper structure, capacitance plate 12 is provided with between described electric capacity core body 3 and conducting rod 1, this tubular electric capacity core body 3 is set with the sheath 4 that barrel dliameter size is mated with the diameter of section size of this electric capacity core body, the described axial both sides of sheath 4 are respectively installed with the insulating coating 5 that cross section is multi-layer umbrella skirt, described insulating coating 5 axially outside is set with cover plate 6 and gland 7, the binding post 2 of described conducting rod 1 rear end passes cover plate 6 and gland 7 successively, described gland 7 and described cover plate 6 to be fixedly mounted on described insulating coating 5, described cover plate 6 is also provided with for even binding post 2 Analysis of End Electric Field, prevents the grading ring 8 of corona discharge, two described insulating coatings 5 are axially respectively installed with flange 9 in inner side, two described flange seals are connected to form flange chamber 10, the SF6 gas as main insulation body is filled with in described flange chamber 10, described flange 10 sidewall is provided with charge valve 15, in described flange chamber 10, described two conducting rod 1 front ends are by connecting extension bar 11, described conducting rod 1 short-tail end is fixedly connected with innermost layer capacitance plate 12 by hold-down ring 13, innermost layer capacitance plate 12 exit is copper end ring 14, at described copper end ring 14 and described hold-down ring 13, equipotential line is installed additional between described hold-down ring 13 and described conducting rod 1.
Preferably, described watchband-shaped contactor 16 is provided with to extension bar 11 two ends excircle, insert described conducting rod 1 to extension bar 11 two ends to be fixed by described watchband-shaped contactor 16 and described conducting rod 1, described all sealing ring is set with to extension bar 11 before and after described watchband-shaped contactor 16 present position.
Preferably, conducting rod 1 inwall of described watchband-shaped contactor 16 mounting groove and correspondence is provided with silver coating.
Preferably, anti-loosening fastening bolt is installed additional outside described hold-down ring 13.
Operation principle of the present utility model is:
See Fig. 1 to Fig. 4, be arranged on grading ring 8 on conducting rod 1 two end cover plate 6 respectively for even terminal board 2 Analysis of End Electric Field, prevent corona discharge; Be located at the terminal board 2 at sleeve pipe two ends respectively for connecting test specimen and pressurized equipment; Cover plate 6 is separately fixed at indoor section of end of insulating coating 5 and outdoor section end, and its effect is sealed insulation overcoat 5 end, prevents SF6 Leakage Gas; Gland 7 is fixed on the outside of cover plate 6, for strengthening the sealing property of cover plate 6; Conducting rod 1 generally has inside and outside two conduits, and electric capacity core body 3 is generally solidificated on the outer wall of outer catheter.Inner catheter is connected with the terminal board 2 at axial two ends, to make to form electrical connection between test specimen and pressurized equipment; Electric capacity core body 3 is the main insulation body of sleeve pipe, and the general epoxide-resin glue that adopts soaks paper structure, and lightweight, good insulation preformance, can be used for the electric field between homogeneous conductive bar 1 and the external world, and bears most of voltage that conducting rod applies; SF6 gas is full of whole inside pipe casing, for electric capacity core body 3 and the insulation between conducting rod 1 and insulating coating 5; Insulating coating 5 by indoor and outdoor two sections form, being arranged on jacket exterior, is the external insulation of sleeve pipe, general adopts organic composite silicon hollow rubber insulator, has excellent anti-fouling flashover performance, when preventing sleeve pipe charged, external flashover occurs; Flange 9 connects insulating coating 5 and sheath 4 for transition, is generally processed with multiple aperture, SF6 gas uniform can be made to be full of whole cannula cavity at sheath 4 and flange 9 endoporus place, ensures that electric property is reliable; Sheath 4 is for linking together indoor section of insulating coating 5 and open air easily.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (4)
1. one kind ± 800kV ultrahigh voltage direct current wall bushing, it is characterized in that, it has two its axial rearward end all with the conducting rod (1) of binding post (2), two conducting rods (1) stage casing coaxial line is set with the electric capacity core body (3) of a tubular rubber leaching paper structure, capacitance plate (12) is provided with between described electric capacity core body (3) and conducting rod (1), this tubular electric capacity core body (3) is set with the sheath (4) that barrel dliameter size is mated with the diameter of section size of this electric capacity core body, described sheath (4) axial both sides are respectively installed with the insulating coating (5) that cross section is multi-layer umbrella skirt, described insulating coating (5) axially outside is set with cover plate (6) and gland (7), the binding post (2) of described conducting rod (1) axial rearward end passes cover plate (6) and gland (7) successively, described cover plate (6) and gland (7) are fixedly mounted on described insulating coating (5), described cover plate (6) is also provided with for even binding post (2) Analysis of End Electric Field, prevents the grading ring (8) of corona discharge, two described insulating coatings (5) are axially respectively installed with flange (9) in inner side, two described flanges (9) are tightly connected and form flange chamber (10), the SF6 gas as main insulation body is filled with in described flange chamber (10), described flange chamber (10) sidewall is provided with charge valve (15), in described flange chamber (10), described two conducting rod (1) axial forward end are by connecting extension bar (11), described conducting rod (1) short-tail end is fixedly connected with innermost layer capacitance plate (12) by hold-down ring (13), innermost layer capacitance plate (12) exit is copper end ring (14), at described copper end ring (14) and described hold-down ring (13), equipotential line is installed additional between described hold-down ring (13) and described conducting rod (1).
2. one according to claim 1 ± 800kV ultrahigh voltage direct current wall bushing, it is characterized in that, described watchband-shaped contactor (16) is provided with to extension bar (11) two ends excircle, describedly described conducting rod (1) is inserted to extension bar (11) two ends fixed by described watchband-shaped contactor (16) and described conducting rod (1), described all sealing ring is set with to extension bar (11) before and after described watchband-shaped contactor (16) present position.
3. one according to claim 2 ± 800kV ultrahigh voltage direct current wall bushing, is characterized in that, conducting rod (1) inwall of described watchband-shaped contactor (16) mounting groove and correspondence is provided with silver coating.
4. one according to claim 3 ± 800kV ultrahigh voltage direct current wall bushing, is characterized in that, described hold-down ring (13) outside installs anti-loosening fastening bolt additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663708.0U CN204303479U (en) | 2014-11-06 | 2014-11-06 | One ± 800kV ultrahigh voltage direct current wall bushing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420663708.0U CN204303479U (en) | 2014-11-06 | 2014-11-06 | One ± 800kV ultrahigh voltage direct current wall bushing |
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| Publication Number | Publication Date |
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| CN204303479U true CN204303479U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420663708.0U Active CN204303479U (en) | 2014-11-06 | 2014-11-06 | One ± 800kV ultrahigh voltage direct current wall bushing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356392A (en) * | 2015-11-17 | 2016-02-24 | 国家电网公司 | Ultrahigh voltage DC through-wall bushing component |
| CN106896257A (en) * | 2017-02-07 | 2017-06-27 | 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 | The electric state detecting system of super-pressure wall bushing |
-
2014
- 2014-11-06 CN CN201420663708.0U patent/CN204303479U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356392A (en) * | 2015-11-17 | 2016-02-24 | 国家电网公司 | Ultrahigh voltage DC through-wall bushing component |
| CN105356392B (en) * | 2015-11-17 | 2019-04-05 | 国家电网公司 | A kind of ultrahigh voltage direct current wall bushing component |
| CN106896257A (en) * | 2017-02-07 | 2017-06-27 | 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 | The electric state detecting system of super-pressure wall bushing |
| CN106896257B (en) * | 2017-02-07 | 2019-11-05 | 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 | The electric state detection system of super-pressure wall bushing |
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