CN101577155A - Draw rod mounting arrangement for a high voltage bushing, high voltage bushing and high voltage device - Google Patents
Draw rod mounting arrangement for a high voltage bushing, high voltage bushing and high voltage device Download PDFInfo
- Publication number
- CN101577155A CN101577155A CNA2008101112371A CN200810111237A CN101577155A CN 101577155 A CN101577155 A CN 101577155A CN A2008101112371 A CNA2008101112371 A CN A2008101112371A CN 200810111237 A CN200810111237 A CN 200810111237A CN 101577155 A CN101577155 A CN 101577155A
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- China
- Prior art keywords
- pull rod
- rod device
- hole
- conductor
- connecting portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims description 17
- 239000012212 insulator Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/30—Sealing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention concerns a draw rod arrangement for a hollow conductor (38) in a high voltage bushing, comprising a draw rod attachment part (31) and an outer terminal attachment part (32), wherein the draw rod attachment part and the outer terminal attachment part are made in one piece forming a combined mounting device (33). The invention also concerns a high voltage bushing comprising such an arrangement, and a high voltage device comprising a bushing with such an arrangement.
Description
Technical field
The present invention relates to the high-voltage electric power system field, relate in particular to the bushing that in the high-tension apparatus of the parts that form this system, uses.
Background technology
As everyone knows, high-pressure installation such as high-tension transformer, reactor and switchgear and equipment are furnished with sleeve pipe usually, and these sleeve pipes are suitable for passing the ground connection barrier and carry electric current under high potential, for example, wall or shell that described ground connection barrier can be a power equipment are such as transformer tank.
Traditional bushing comprises the insulator of being made by pottery or composite material, and this insulator is provided with shell and is hollow substantially.In the inboard of sleeve pipe, the voltage classifying equipoment by capacitor main body or certain other type carries out the voltage classification, and electric conductor passes this capacitor main body or voltage classifying equipoment.Electric conductor links to each other a side of sleeve pipe with opposite side, be connected with high voltage electric power equip ment at a described side place, and the place is connected with another power equipment at described opposite side.For example, when first power equipment is transformer, sleeve pipe is assemblied on the transformer case, on box body wall, and the conductor of sleeve pipe links to each other the inboard of transformer with the outside, can connect another power equipment in the outside, for example bus, surge arrester or direct current valve.
Describe an example being suitable for the prior art sleeve pipe that uses with high-tension transformer now with reference to Fig. 1, Fig. 1 shows under the situation of transformer, is installed in the schematic cross sectional views such as the sleeve pipe 1 in the wall 18 of box body wall.High-pressure conductor 10 passes the central authorities of the sleeve insulator 12 of hollow, the shell that sleeve insulator 12 forms around this high-pressure conductor.In the insulator shell, be provided with condenser core 14, be used for carrying out the voltage classification being formed on high-pressure conductor 10 voltage stress on every side.Be provided with flange 16 in the outside of shell 12, the shell of sleeve pipe by flange 16 via transformer tank body wall 18 ground connection.
How the bottom part that also shows high-pressure conductor 10 in Fig. 1 forms bottom contact 20, and this bottom contact 20 is arranged to be connected to the internal part of transformer.For this reason, in the inside of transformer the inside contact 22 that matches is set.The upper end opposite of sleeve pipe with bottom contact 20 ends be provided for conductor 10 on outside terminal 24.This outside terminal 24 is electrically connected to conductor 10 by the interface of general planar, and forms the top cover of sleeve pipe, so that be electrically connected to external power source or equipment with conductor and then with transformer.
According to the transformer of prior art, can use tie system to guarantee electrical connection between sleeve pipe and the transformer.This system needs the conductor of hollow, and wherein the inside of this conductor is opened wide towards the transformer oil in the transformer.Must sealing be set in the inside of conductor, leak in the surrounding environment outward to avoid transformer oil to flow out the outer and sleeve pipe of transformer.In the art, with the traditional approach of the outside seal of the inside of conductor and transformer, for example the valve Room is after having assembled tie system, uses the extension fixture that is assemblied in the conductor.This extension fixture has following shortcoming: its required radial space causes conducting wall thickness to reduce unfriendly; Fail-safe assembly work is carried out at the scene in the open air.
In addition, externally terminal may not be directly connected in the prior art sleeve pipe of top cover of sleeve pipe, outside terminal need be screwed to steel draw ring or the analog that is arranged in conductor.This draw ring is screwed in the conductor again, thus because required internal whorl former thereby reduced the wall thickness of conductor.This draw ring device also needs to provide sealing.
Routinely, use the term high pressure to represent to be higher than the voltage of about 50kV.Nowadays, the upper limit in the commercial high-tension apparatus is generally 1100kV, but in the near future, all is predictable as 1200kV even higher voltage.In addition, current class raises, and may reach 4000-5000A or even higher.
For high pressure and 2000A and the above rated current in 800kV and the above scope, for example when the heat radiation that relates to sleeve pipe and cooling, electric field and electric insulation etc., the nature that requires of sleeve pipe is improved.In this article, low-loss is necessary, particularly wants to reach target current.It mainly is because each contact in the current path between the different piece of loss in the conductor and sleeve pipe or the loss in the joint that loss takes place in the sleeve pipe of today.When relating to conductor, minimize every kind of means so that the electric conducting material such as lead in the conductor reduces and just becoming more and more important.It will also be appreciated that less joint will reduce loss, this is favourable in high pressure and high electric current application scenario.
Summary of the invention
The object of the present invention is to provide a kind of draw rod mounting arrangement and a kind of bushing, this bushing is the improvement to the prior art sleeve pipe, and this makes it possible to reach above-mentioned high pressure grade and high rated current.
The present invention also has an order to be, a kind of high-tension apparatus that comprises this bushing is provided.
Wherein, these purposes have been realized by the draw rod mounting arrangement, bushing and the high-tension apparatus that in independent claims, limit.
According to the present invention, define a kind of pull rod device that is used for the hollow conductor of bushing, this pull rod device comprises pull bar connecting portion and outside terminal connecting portion, and wherein pull bar connecting portion and outside terminal partly are made into the single type member, and this single type member forms the combined type erection unit.Pull rod device of the present invention has the advantage that function combinations that draw ring and pull bar are installed is got up, thereby has saved the conductor volume inside, but also has saved conductor material owing to lead is less.The another one advantage is that the personnel of erecting bed needn't relate to the assembling of mechanical part, and this makes that assembling is easier and more can guarantee failsafe, and provides cost savings.
According to another feature, the pull bar connecting portion of erection unit is provided with axial hole, the end of pull bar is passed this axial hole and is inserted, and the place of extending axially in this hole is provided with internal bore, the diameter of this internal bore is bigger than the diameter of axial hole, and the end of thread of pull bar extends in this bore hole, and by the fastener in the internal bore pull bar is installed.This fastener can comprise the nut on the end of thread of sitting the washer arrangement on the diapire that is against internal bore and being screwed in pull bar.
Internal bore extends through the outside terminal connecting portion.
According to another feature, the outside terminal connecting portion is provided with screwed hole, and these screwed holes are suitable for holding the screw that is used to install the outside terminal contact.
In addition, can be provided with at least one sealing device that is arranged between conductor and the combined type erection unit.For example, when there is liquid power equipment inside, use this sealing, wherein, comprise that the sleeve pipe of pull rod device is installed on this power equipment, go out power equipment via conductor and casing leak so that can prevent liquid.For example, this is the situation at the transformer that is full of insulating oil.
The present invention also has following feature: it comprises the end plug that is used for being installed on above the combined type erection unit in the openend of conductor.This connector also has sealing function.
Also can comprise at least one sealing device according to pull rod device of the present invention, it is arranged in extending downwardly between the part in the internal bore of internal bore and end plug.When in the sleeve pipe that is used in transformer, sealing prevents that also any dielectric that is present in conductor inside from leaking.
In addition, according to the present invention, the outside terminal connecting portion is provided with second group of screwed hole, and end plug is provided with corresponding hole, be used for by screw being inserted corresponding hole and be screwed in second group of hole in the outside terminal connecting portion, and end plug is installed on the outside terminal connecting portion.
End plug also has one group of other hole, and this group hole is suitable for holding the screw that is used to install the outside terminal contact.
According to the present invention, also define a kind of bushing that comprises hollow conductor, this bushing is characterised in that it comprises according to each the claim described pull rod device relevant with pull rod device.
The feature of this bushing can be: be connected to this hollow conductor in the end of the conductor of combined type erection unit by being welded on sleeve pipe.
Alternately, the feature of this bushing can be: be connected to this hollow conductor in the end of the conductor of combined type erection unit by being screwed in sleeve pipe.In this case, do not need to weld.
At last, according to the present invention, define a kind of high-tension apparatus, it comprises according to each the claim described sleeve pipe relevant with sleeve pipe.
Description of drawings
Describe the present invention now with reference to accompanying drawing, accompanying drawing only illustrates embodiments of the present invention in the mode of example, wherein:
The cutaway view of the schematically illustrated bushing according to prior art of Fig. 1, and
The schematically illustrated cutaway view of Fig. 2 according to pull rod device of the present invention.
Embodiment
In this manual, will use term " high pressure " (HV) to represent 50kV and above voltage.Current is 1100kV to commerce with the upper limit of high pressure, but should predict, and the present invention also can be used in higher voltage, reaches 1200kV or even higher.Usually, the present invention be applied to about 200kV and more than.
Execution mode according to pull rod device of the present invention has been shown among Fig. 2, and it is installed in and is arranged in for example conductor 38 of bushing (not shown).This device comprises pull bar connecting portion 31 and outside terminal connecting portion 32, and these two parts are combined into the single type member, hereinafter this single type member are called combined type erection unit 33.Hereinafter pull bar connecting portion 31 is called the pull bar part, outside terminal connecting portion 32 is called the terminal part.Pull bar part 31 has first bottom 34, and this first bottom 34 has the basic configuration of hollow cone, and the cone base of opening is towards the inside of hollow conductor 38.Pull bar part 31 has second top 36 of basic annular, and this second top 36 has central axial hole 40, and pull bar 42 inserts by this central authorities' axial hole 40.In top 36, above hole 40, be provided with the diameter internal bore 44 bigger than the diameter in hole 40, internal bore 44 also 40 extends through terminal part 32 from the hole always.By fastener pull bar 42 is installed, is installed with the nut 48 on the threaded tip that is screwed to pull bar such as the washer arrangement 46 or the similar device of the diapire that is butted on internal bore 44 by seat.
The terminal part 32 of pull rod device is annular basically, has aforesaid internal bore 44.In the upper end of terminal part, be provided with screwed hole 50, these screwed holes 50 be suitable for screw fit to be used to install outside terminal contact (not shown).
Except erection unit 33, pull rod device also comprises end plug 52, and end plug 52 inserts in the openend of conductors 38 and covers erection unit 33.By screw 54 end plug is installed to the upper end of terminal part, in the hole 56 that screw 54 inserts in the end plugs and be screwed in the respective threads hole 58 in the top that is arranged on terminal part 32.
A function of end plug is to have the inside and the outside seal of the conductor of pull rod device.In order to finish sealing, pull rod device also comprises at least one seal 60 between the inboard of end plug 52 and bore hole 44.Sealing is guaranteed the inside of conductor and the outside seal of conductor.For example, when pull rod device was installed in the conductor in the transformer, the conductor coolant in the transformer usually opened wide, and coolant is generally oil and it is highly important that end leakage that oil can not be by conductor is to outside.Can encircle by lip ring such as O-sealing is provided, this lip ring is installed in the groove in the part in the internal bore that extends downwardly into terminal part 32 44 of being located at end plug 52, and perhaps alternately, this groove can be arranged in the wall of bore hole.Certainly, seal can have variations or alternative position, and more than one seal for example is set.Should be mentioned that also some application scenario may not need end plug and sealing function thereof.
As mentioned above, locate and be screwed in the installing hole 50 of terminal part 32 for the end that the outside terminal contact is installed in conductor, end plug also must have corresponding hole 51 so that screw passes.Also to should be mentioned that, as substituting of fastening outside terminal contact in terminal part 32, can be at the disposed outside mid portion of end plug, and outside terminal can be attached to this part.
Erection unit may be screwed to or is welded in the end of conductor.Under the situation in being screwed to end conductor, erection unit is provided with external screw thread 59, is used for matching with the corresponding internal thread of the wall of end conductor.Must between the inboard of conductor and pull rod device, additional seal be set then.Figure 2 illustrates this example, wherein show seal 62.The sealing part is in the groove that is arranged between end plug 52 and the terminal part 32.The sealing part has annular shape such as O annular, and is compressed into and makes it fill up groove and outwards be filled into conducting wall always.Certainly if necessary, a more than seal can be set.In addition, other alternative site also can be set, as long as the sealing part seals between the outside of the inboard of conductor and pull rod device to the sealing part.
Described pull rod device can be used at the sleeve pipe that is used for direct current and alternating current application scenario.
Show that in exemplary execution mode transformer can be the high-tension apparatus that wherein uses pull rod device of the present invention and bushing.Yet, it is emphasized that pull rod device of the present invention and bushing also can use with the high-tension apparatus of other type, for example be applied in reactor, circuit breaker, generator, switchgear or other any suitable device in the high-pressure system.In addition, in specification of the present invention, term power equipment and high-tension apparatus it should also be understood that to comprising cable, bus, surge arrester and direct current valve etc.
When in transformer, using pull rod device of the present invention and sleeve pipe, use oil as the dielectric in the transformer, for example in the high voltage direct current transmission valve Room, medium is an air at the opposite side of sleeve pipe.Such sleeve pipe is commonly referred to air-oil or air-liquid sleeve pipe.Yet, indicated as mentioned, be suitable in multiple power equipment, using according to pull rod device of the present invention and sleeve pipe, what the medium of each side of pipe-in-pipe is not, as air-air (wall bushing), air-gas (gas switchgear) etc.Should also be noted that the present invention to the selection of dielectric in the sleeve pipe without limits.For example, dielectric can be gas, oil, gel or their combination.
Persons of ordinary skill in the art will recognize that the described execution mode that the invention is not restricted to only provide by way of example, but can make amendment in many ways within the scope of the claims and modification.
Claims (13)
1. pull rod device that is used for the hollow conductor (38) of bushing, comprise pull bar connecting portion (31) and outside terminal connecting portion (32), wherein, described pull bar connecting portion and described outside terminal connecting portion are made the single type member, and described single type member forms the erection unit (33) of combined type.
2. pull rod device as claimed in claim 2, it is characterized in that, the pull bar connecting portion (31) of described erection unit is provided with axial hole (40), one end of pull bar (42) inserts by described axial hole (40), and be provided with internal bore (44) at the place of extending axially in described hole, the diameter of described internal bore (44) is bigger than the diameter in described hole, and the end of thread of described pull bar (42) extends in the described bore hole, and described pull bar is installed by the fastener in the described internal bore (46,48).
3. pull rod device as claimed in claim 2 is characterized in that, described internal bore (44) extends through described outside terminal connecting portion (32).
4. each described pull rod device in the claim as described above is characterized in that described outside terminal connecting portion (32) is provided with screwed hole (50), and described screwed hole (50) is suitable for holding the screw that is used to install the outside terminal contact.
5. each described pull rod device in the claim as described above is characterized in that described pull rod device comprises at least one sealing device (62) that is arranged between described conductor (38) and the described combined type erection unit (33).
6. each described pull rod device in the claim as described above is characterized in that described pull rod device comprises end plug (52), and described end plug (52) is used for being installed in erection unit (33) top of described combined type in the openend of described conductor (38).
7. pull rod device as claimed in claim 6 is characterized in that, described pull rod device comprises at least one sealing device (60) between the part in the described internal bore of extending downwardly into that is arranged in described internal bore (44) and described end plug (52).
8. pull rod device as claimed in claim 7, it is characterized in that, described outside terminal connecting portion (32) is provided with second group of screwed hole (58), and described end plug (52) is provided with corresponding hole (56), be used for by screw (54) being inserted described hole (56) and be screwed in described second group of hole (58) in the described outside terminal connecting portion, and described end plug is installed on the described outside terminal connecting portion.
9. as claim 7 or 8 described pull rod device, it is characterized in that described end plug (52) has other one group of hole (51), this group hole (51) is suitable for holding the screw that is used to install the outside terminal contact.
10. a bushing that comprises hollow conductor is characterized in that, described bushing comprises according to each described pull rod device among the claim 1-9.
11. bushing as claimed in claim 10 is characterized in that, is connected to described hollow conductor (38) in the end of the described conductor of the erection unit of described combined type (33) by being welded on described sleeve pipe.
12. bushing as claimed in claim 10 is characterized in that, is connected to described hollow conductor (38) in the end of the described conductor of the erection unit of described combined type (33) by being screwed in described sleeve pipe.
13. one kind comprises the high-tension apparatus as the sleeve pipe that each limited among the claim 10-11.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP08155702.7 | 2008-05-06 | ||
| EP08155702A EP2117016A1 (en) | 2008-05-06 | 2008-05-06 | Draw rod mounting arrangement for a high voltage bushing, high voltage bushing comprising such arrangement and high voltage device comprising bushing with such arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101577155A true CN101577155A (en) | 2009-11-11 |
| CN101577155B CN101577155B (en) | 2013-05-08 |
Family
ID=39772927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101112371A Active CN101577155B (en) | 2008-05-06 | 2008-06-05 | Draw rod mounting arrangement for a high voltage bushing, high voltage bushing and high voltage device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2117016A1 (en) |
| CN (1) | CN101577155B (en) |
| BR (1) | BRPI0912208A2 (en) |
| WO (1) | WO2009135741A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667997A (en) * | 2020-05-20 | 2020-09-15 | 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 | Current conversion transformer network side sleeve pull rod system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2455950B1 (en) * | 2010-11-19 | 2013-11-06 | ABB Technology Ltd | High voltage bushing with reinforced conductor |
| EP2482290B1 (en) | 2011-01-28 | 2017-07-19 | ABB Schweiz AG | Temperature compensated bushing design |
| CN102355791A (en) * | 2011-09-28 | 2012-02-15 | 南京创能电力科技开发有限公司 | Device for insulation connecting between cathode and anode of plasma generator |
| CN108321741B (en) * | 2018-02-08 | 2020-06-19 | 西安交通大学 | Ultra/extra-high voltage gas insulation wall bushing center current-carrying conductor bracing structure and ultra/extra-high voltage gas insulation wall bushing |
| CN108666109B (en) * | 2018-05-24 | 2024-02-13 | 上泰电气有限公司 | Plug assembly, transformer bushing and use method of plug assembly |
| EP3826035A1 (en) * | 2019-11-20 | 2021-05-26 | ABB Power Grids Switzerland AG | Draw-rod bushing with sealed bottom contact |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1967653A (en) * | 1931-03-05 | 1934-07-24 | Ohio Brass Co | Bushing insulator |
| US6194986B1 (en) * | 1998-11-03 | 2001-02-27 | Lapp Insulator Company | Quick bottom connection for a transformer bushing |
| CN2881905Y (en) * | 2005-12-20 | 2007-03-21 | 苏州九正电工有限公司 | Outlet sleeve for 390 MW gasturbuine generator |
| CN101136280A (en) * | 2006-08-31 | 2008-03-05 | Abb技术有限公司 | High voltage device, high voltage bushing and method of assembling said device |
| CN201044192Y (en) * | 2007-05-09 | 2008-04-02 | 宁波三爱互感器有限公司 | Electric power casing tube |
-
2008
- 2008-05-06 EP EP08155702A patent/EP2117016A1/en not_active Withdrawn
- 2008-06-05 CN CN2008101112371A patent/CN101577155B/en active Active
-
2009
- 2009-04-07 BR BRPI0912208A patent/BRPI0912208A2/en not_active IP Right Cessation
- 2009-04-07 WO PCT/EP2009/054129 patent/WO2009135741A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111667997A (en) * | 2020-05-20 | 2020-09-15 | 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 | Current conversion transformer network side sleeve pull rod system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009135741A1 (en) | 2009-11-12 |
| BRPI0912208A2 (en) | 2017-08-22 |
| CN101577155B (en) | 2013-05-08 |
| EP2117016A1 (en) | 2009-11-11 |
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