CN209216733U - 2000kV oil-impregnated paper condenser type transformer bushing - Google Patents

Abstract

The utility model provides a kind of 2000kV oil-impregnated paper condenser type transformer bushing, including head construction, external insulation, interior insulation, tail structure and current-carrying structures, head construction, current-carrying structures and tail structure are from top to bottom sequentially connected with, and current-carrying structures respectively with head construction, tail structure electrical connection, external insulation sleeve is set to the outside of current-carrying structures, the upper end of external insulation connects with head construction sealing, the lower end of external insulation connects with tail structure sealing, the first annular space is formed between external insulation and current-carrying structures, interior insulation is sheathed on current-carrying structures and between current-carrying structures and external insulation, the second annular space is formed between interior insulation and current-carrying structures, and there is gap between the outer surface of interior insulation and the inner surface of external insulation, first annular space is connected to the second annular space and is filled with insulating oil in the first annular space and the second annular space.The utility model can be matched with 2000kV testing transformer, played insulation, support and circulation to 2000kV testing transformer, filled up the blank of this technology.

Description

2000kV oil-impregnated paper condenser type transformer bushing

Technical field

The utility model relates to bushing technical fields, refer in particular to a kind of 2000kV paper condenser transformer set Pipe.

Background technique

With China's sustained economic growth, electricity needs increases swift and violent.In order to save land resource, improve power transmission efficiency, Extra-high-voltage alternating current and extra-high voltage direct-current transmission rack are established in state plan, and extra-high voltage alternating current-direct current transmits electricity project will more and more in future It is more.It is electrical to 1000kV reactor temperature rise test, alternating current-direct current 1000kV casing in order to meet extra-high voltage alternating current-direct current power transmission and transforming equipment The test requirements documents such as test, the Insulation Test of 1000kV reactor and excitation property test need to design, one voltage rating of manufacture is The testing transformer of 2000kV.

Wherein, 2000kV oil-impregnated paper condenser type transformer bushing be for the matched important component of 2000kV testing transformer, it is right Transformer plays insulation, support, through-flow.

Utility model content

The purpose of the utility model is to provide a kind of 2000kV oil-impregnated paper condenser type transformer bushings, can test and become with 2000kV Depressor matches, and plays insulation, support and circulation to 2000kV testing transformer.

A kind of in order to achieve the above object, the utility model provides 2000kV oil-impregnated paper condenser type transformer bushing, wherein institute Stating 2000kV oil-impregnated paper condenser type transformer bushing includes head construction, external insulation, interior insulation, tail structure and current-carrying structures, institute Head construction, the current-carrying structures and the tail structure is stated from top to bottom to be sequentially connected with, and the current-carrying structures respectively with institute Head construction, tail structure electrical connection are stated, the external insulation sleeve is set to the outside of the current-carrying structures, the external insulation Upper end connects with head construction sealing, and the lower end of the external insulation connects with tail structure sealing, the external insulation The first annular space is formed between the current-carrying structures, the interior insulation is sheathed on the current-carrying structures and is located at the current-carrying knot Between structure and the external insulation, the second annular space is formed between the interior insulation and the current-carrying structures, and the interior insulation is outer There is gap, first annular space is connected to and described with second annular space between side surface and the inner surface of the external insulation Insulating oil is filled in first annular space and second annular space.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the external insulation includes from top to bottom sequentially Upper insulator, connection sleeve and lower ceramic part, the upper end of the upper insulator and the lower end of the upper insulator being tightly connected are respectively formed There is mucilage binding flange, the upper insulator seals phase with the head construction with can be removably mounted by the mucilage binding flange that the upper end is arranged It connects, the upper end of the mucilage binding flange that the upper insulator is arranged by its lower end and the connection sleeve seals phase with can be removably mounted It connects, the mucilage binding ratio for connecting mucilage binding flange described in sleeve is 0.41~0.45.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein on the outer surface of the upper insulator by up to Lower projection is formed with multiple beveled structures, and each beveled structure is along the upper insulator circumferentially around being convexly equipped in the upper porcelain On the outer surface of set, the upper surface of each beveled structure is to be gradually reduced along the direction of the axis far from the upper insulator The conical surface, the beveled structure includes multiple gamp structures and multiple umbellule structures, the gamp structure and the umbellule structure From top to bottom alternate intervals are arranged, and the diameter of the gamp structure is greater than the diameter of the umbellule structure, the public affairs of the upper insulator Creepage distance is claimed to be greater than 38000mm.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the upper insulator include more piece from top to bottom Sequentially connected porcelain piece, inorganic bond combines between the adjacent porcelain piece of every two section, the upper section of the upper insulator be in by up to The identical column of lower diameter, in the cone cell of diameter flaring from top to bottom, the lower section of the upper insulator is in for the middle section of the upper insulator The identical column of diameter from top to bottom, the diameter phase of the diameter of the upper end of the upper insulator and the upper end in the middle section of the upper insulator Deng the diameter of the lower section of the upper insulator is equal with the diameter of lower end in middle section of the upper insulator, the lower section of the upper insulator Bottom be located at the upper insulator lower end the mucilage binding flange top be equipped with bottom umbrella structure, along the axis of the external insulation To the thickness of the bottom umbrella structure is greater than the thickness of the gamp structure.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the height of the upper insulator is greater than 10000mm, and the outer diameter of the mucilage binding flange of the lower end of the upper insulator is greater than 1200mm.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the umbrella shape of the upper section of the upper insulator The diameter of structure is greater than or equal to 650mm, and the gamp structure of the upper section of the upper insulator protrudes the upper section of the upper insulator The size of outer surface be 70mm~80mm, and the umbellule structure of the upper section of the upper insulator protrudes the upper of the upper insulator The size of the outer surface of section is 50mm~60mm, the adjacent gamp structure of the upper section of the upper insulator and the umbellule knot Spacing between structure is 70mm~75mm；

The size that the gamp structure in the middle section of the upper insulator protrudes the outer surface in the middle section of the upper insulator is 60mm~65mm, and the umbellule structure in the middle section of the upper insulator protrudes the size of the outer surface in the middle section of the upper insulator For 45mm~50mm, the spacing between the adjacent gamp structure and the umbellule structure in the middle section of the upper insulator is 65mm~75mm；

The diameter of the beveled structure of the lower section of the upper insulator is less than or equal to 1100mm, the lower section of the upper insulator The gamp structure to protrude the size of outer surface of the lower section of the upper insulator be 50mm~55mm, and under the upper insulator Section the umbellule structure protrude the upper insulator lower section outer surface size be 35mm~40mm, the upper insulator it is upper Spacing between the adjacent gamp structure and the umbellule structure of section is 55mm~65mm.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the current-carrying structures include contact tube, described The lower end of contact tube is connect with the tail structure, and the upper end of the contact tube is connect with the head construction；The head knot Structure includes conservator, cover board, conductive seal head, bellows and terminal plate, and the conservator is the tubular structure of inner hollow, the oil First through hole is offered on the bottom plate of pillow, the second through-hole is offered on the top plate of the conservator, the upper end of the contact tube is under Second through-hole on the supreme sequentially top plate of the first through hole on the bottom plate of the conservator and the conservator is stretched To the top of the conservator, third through-hole is offered on the cover board, the cover board is sheathed on described by the third through-hole On contact tube, the cover board connect with the top plate of the conservator and closes second through-hole, the conductive seal in which can be removably mounted Head is sheathed on the top of the contact tube in which can be removably mounted, and the bellows-sheathed is set to the contact tube being located above the cover board Outside, the lower end of the bellows connect in which can be removably mounted with the cover board, the upper end of the bellows and the conductive seal Head connects in which can be removably mounted, and the terminal plate is set to the top of the conductive seal head, and the terminal plate and the conductive seal Head electrical connection.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the interior insulation includes core wrap-around tube, more Layer aluminium foil and multi-layer cable paper, the core wrap-around tube are coaxially sheathed on the contact tube, under the core wrap-around tube End is connect with the tail structure, and the upper end of the core wrap-around tube keeps coaxial, institute by positioning ring flat-plate and the contact tube It states and forms second annular space between core wrap-around tube and the contact tube, cable paper described in multilayer replaces with aluminium foil described in multilayer Compartment of terrain winding is coated on the core wrap-around tube, and is wound with cable paper described in multilayer between every two layers of aluminium foil, The upper end of the core wrap-around tube and the lower end of the core wrap-around tube radially offer intercommunicating pore, two connections respectively Hole is connected to first annular space and second annular space；Fuse gripping sleeve, the fuse gripping sleeve are arranged in the interior insulation It is able to maintain between the interior insulation and the contact tube and is coaxially positioned between the interior insulation and the external insulation.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the tail structure include current-carrying pedestal and Positioning seat, the current-carrying pedestal connect with the sealing of the lower end surface of the external insulation, and the positioning seat installs the load in which can be removably mounted On the upper surface for flowing pedestal, the side surface of the positioning seat connects with the sealing of the inner surface of the external insulation, the current-carrying pedestal Center be axially formed through hole along it, the lower end of the contact tube is described through the positioning seat and the current-carrying pedestal Through hole location sealing connects, and the lower end of the core wrap-around tube connects with positioning seat positioning.

2000kV oil-impregnated paper condenser type transformer bushing as described above, wherein the current-carrying structures further include connecting terminal, Locating cone and pull rod, the pull rod are coaxially set to the inside of the contact tube, the lower end of the pull rod and the connecting terminal Connect, the upper end of the pull rod is connected by elastic tensioning structure with the head construction, the upper surface of the connecting terminal with The lower end surface of the current-carrying pedestal abuts, and the locating cone is sheathed on the pull rod, and the lower end of the locating cone with it is described Connecting terminal abuts.

Compared with prior art, as follows the advantages of the utility model:

2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model can with 2000kV testing transformer is mating makes With, to 2000kV testing transformer play a part of insulation, support and circulation, fill up the blank of this technology.

Detailed description of the invention

Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model It encloses.Wherein:

Fig. 1 is the structural schematic diagram of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model；

Fig. 2 is the structure of the upper insulator of the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Schematic diagram；

Fig. 3 is the mucilage binding of the upper insulator of the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model The structural schematic diagram of flange；

Fig. 4 is the upper section of the upper insulator of the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Beveled structure structural schematic diagram；

Fig. 5 is the middle section of the upper insulator of the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Beveled structure structural schematic diagram；

Fig. 6 is the lower section of the upper insulator of the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Beveled structure structural schematic diagram；

Fig. 7 is the structural representation of the head construction of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Figure；

Fig. 8 is the structural schematic diagram of the interior insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model；

Fig. 9 be the external insulation of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model upper insulator with connect The partial structural diagram of junction between sleeve；

Figure 10 is the structural representation of the tail structure of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Figure；

Figure 11 is the current-carrying structures schematic diagram of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model；

Figure 12 is another state of the current-carrying structures of 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model Structural schematic diagram.

Drawing reference numeral explanation:

1, head construction；

11, conservator；

12, cover board；

13, conductive seal head；

14, bellows；

15, terminal plate；

16, elastic tensioning structure；

17, protective cover；

2, external insulation；

21, the first annular space；

22, the second annular space；

23, upper insulator；

231, mucilage binding flange；

232, upper section；

233, middle section；

234, lower section；

235, beveled structure；

2351, gamp structure；

2352, umbellule structure；

24, sleeve is connected；

241, connecting flange；

25, lower ceramic part；

3, interior insulation；

31, core wrap-around tube；

311, intercommunicating pore；

32, aluminium foil；

33, cable paper；

34, fuse gripping sleeve；

341, closing sleeve；

342, lug is connected；

343, counter flange；

4, tail structure；

41, current-carrying pedestal；

42, positioning seat；

5, current-carrying structures；

51, contact tube；

52, connecting terminal；

53, locating cone；

54, pull rod

Specific embodiment

In order to have clearer understanding to the technical solution of the utility model, purpose and effect, now in conjunction with Detailed description of the invention sheet The specific embodiment of utility model.

As shown in Fig. 1~Figure 12, the utility model provides a kind of 2000kV oil-impregnated paper condenser type transformer bushing, wherein 2000kV oil-impregnated paper condenser type transformer bushing includes head construction 1, external insulation 2, interior insulation 3, tail structure 4 and current-carrying structures 5, head construction 1, current-carrying structures 5 and tail structure 4 are from top to bottom sequentially connected with, and current-carrying structures 5 respectively with head construction 1, Tail structure 4 is electrically connected, and external insulation 2 is sheathed on the outside of current-carrying structures 5, and upper end and the head construction 1 of external insulation 2 seal phase It connects, the lower end of external insulation 2 connects with the sealing of tail structure 4, and the first annular space 21 is formed between external insulation 2 and current-carrying structures 5, interior exhausted Edge 3 is sheathed on current-carrying structures 5 and between current-carrying structures 5 and external insulation 2, and is formed between interior insulation 3 and current-carrying structures 5 Two annular spaces 22, and there is gap, the first annular space 21 and second between the outer surface of interior insulation 3 and the inner surface of external insulation 2 Insulating oil is filled in the connection of annular space 22 and the first annular space 21 and the second annular space 22.2000kV oilpaper provided by the utility model Capacitance type transformer sleeve can be matched with 2000kV testing transformer, to 2000kV testing transformer rise insulation, support and The effect of circulation.

Further, as shown in FIG. 1 to FIG. 6, Fig. 9 and Figure 10,2000kV paper condenser provided by the utility model becomes Depressor casing, wherein external insulation 2 includes the upper insulator 23 being from top to bottom sequentially tightly connected, connects sleeve 24 and lower ceramic part 25, The tubular structure of a upper and lower opening and inner hollow, upper insulator is collectively formed in upper insulator 23, connection sleeve 24 and lower ceramic part 25 23 upper end and the lower end of upper insulator 23 are respectively formed with mucilage binding flange 231, the mucilage binding method that upper insulator 23 is arranged by the upper end Orchid 231 connects in which can be removably mounted with the sealing of head construction 1, the mucilage binding flange 231 and connector sleeve that upper insulator 23 is arranged by its lower end The upper end of cylinder 24 seals and connects in which can be removably mounted, wherein the upper end of connection sleeve 24 is equipped with connecting flange 241, under upper insulator 23 The mucilage binding flange 231 at end connects in which can be removably mounted with the connecting flange 241 for the upper end for connecting sleeve 24, connects sleeve 24 as aluminium weldering Fitting；The mucilage binding ratio of mucilage binding flange 231 is 0.41~0.45, the mucilage binding of flange than for cement glue upper insulator 23 axial direction On height and upper insulator 23 corresponding position outer diameter ratio, preferably, the mucilage binding flange of the lower end of upper insulator 23 231 mucilage binding ratio is 0.427, at this point, the anti-seismic performance with higher of external insulation 2；The set-up mode of mucilage binding flange 231 is, Multiple cyclic annular mucilage binding slots coaxial with the corresponding position of upper insulator 23, upper 23 appearance of insulator are set on the inner wall of flange main body Be bonded with molding sand at position corresponding with cyclic annular mucilage binding slot on face, thus enhance upper insulator 23 with connect sleeve 24 and upper porcelain Connection mechanical strength between set 23 and head construction 1, to improve the anti-seismic performance of the utility model.

Further, as shown in FIG. 1 to FIG. 2 and Fig. 4~Fig. 6,2000kV paper condenser provided by the utility model Bushing shell for transformer, wherein projection from top to bottom is formed with multiple beveled structures 235, each umbrella shape knot on the outer surface of upper insulator 23 For structure 235 along upper insulator 23 circumferentially around being convexly equipped on the outer surface of upper insulator 23, the upper surface of each beveled structure 235 is equal For the conical surface being gradually reduced along the direction of the axis far from upper insulator 23, the lower surface of each beveled structure 235 is along upper The horizontal plane of insulator 23 radially extended, beveled structure 235 include multiple gamp structures 2351 and multiple umbellule structures 2352, From top to bottom alternate intervals are arranged for gamp structure 2351 and umbellule structure 2352, and the diameter of gamp structure 2351 is greater than umbellule structure 2352 diameter, beveled structure 235 is not only conducive to improve flashover voltage and resistant is horizontal, also has good aerodynamics special Property, the nominal creepage distance for being conducive to the self-cleaning of external insulation 2, and meeting upper insulator 23 is greater than the requirement of 38000mm.

Further, 2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model, wherein upper insulator 23 wraps More piece sequentially connected porcelain piece from top to bottom is included, inorganic bond combines between the adjacent porcelain piece of every two section, and each porcelain piece that saves is all made of The manufacture of high-strength electroceramics, the upper section 232 of upper insulator 23 in the identical column of diameter from top to bottom, the middle section 233 of upper insulator 23 be in by Up to the cone cell of lower diameter flaring, the lower section 234 of upper insulator 23 is in the identical column of diameter from top to bottom, the upper end of upper insulator 23 Diameter it is equal with the diameter of upper end in middle section 233 of upper insulator 23, the diameter of the lower section 234 of upper insulator 23 and upper insulator 23 The diameter of the lower end in middle section 233 is equal, so that upper insulator 23 is in similar " tower " structure, advantageously reduces the weight of insulator 23 The heart, to improve the stability of the utility model, the bottom of the lower section 234 of upper insulator 23 is located at the mucilage binding method of the lower end of upper insulator 23 The top of orchid 231 is equipped with bottom umbrella structure, and the thickness of bottom umbrella structure is greater than the thickness of gamp structure 2351, and thickness refers to bottom Umbrella structure and size of the gamp structure 2351 in the axial direction of external insulation 2, to improve intensity when upper insulator 23 lifts by crane.

Further, the height of upper insulator 23 is greater than 10000mm, and the mucilage binding flange 231 of the lower end of upper insulator 23 Outer diameter is greater than 1200mm.

Wherein, preferably, upper insulator 23 includes 8 section porcelain pieces, the height of upper insulator 23 is 11300mm, needs to illustrate Be be arranged such be only the utility model preferred embodiment, those skilled in the art can also height to upper insulator 23 and The joint number of composition porcelain piece is adjusted, and the utility model is not limited thereto.

Preferably, as shown in Fig. 4~Fig. 6,2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model, In, the diameter of the beveled structure 235 of the upper section 232 of upper insulator 23 is greater than or equal to 650mm, the upper section 232 of upper insulator 23 it is big Umbrella structure 2351 protrudes the size of the above outer surface of the upper section 232 of insulator 23 for 70mm~80mm, preferably 75mm, and upper insulator The size that the umbellule structure 2352 of 23 upper section 232 protrudes the outer surface of the upper section 232 of upper insulator 23 is 50mm~60mm, excellent Select 55mm, the spacing between the adjacent gamp structure 2351 and umbellule structure 2352 of the upper section 232 of upper insulator 23 be 70mm~ 75mm, preferably 72mm；

The size of the outer surface in the middle section 233 of insulator 23 is on the protrusion of gamp structure 2351 in the middle section 233 of upper insulator 23 60mm~65mm, preferably 62mm, and the umbellule structure 2352 in the middle section 233 of upper insulator 23 protrudes the middle section 233 of upper insulator 23 The size of outer surface be 45mm~50mm, preferably 47mm, the adjacent gamp structure 2351 in the middle section 233 of upper insulator 23 with it is small Spacing between umbrella structure 2352 is 65mm~75mm, preferably 70mm；

The diameter of the beveled structure 235 of the lower section 234 of upper insulator 23 is less than or equal to 1100mm, the lower section of upper insulator 23 234 gamp structure 2351 protrudes the size of the above outer surface of the lower section 234 of insulator 23 for 50mm~55mm, preferably 51mm, and The umbellule structure 2352 of the lower section 234 of upper insulator 23 protrude the outer surface of the lower section 234 of upper insulator 23 size be 35mm~ 40mm, preferably 36mm, the spacing between the adjacent gamp structure 2351 and umbellule structure 2352 of the upper section 232 of upper insulator 23 are 55mm~65mm, preferably 60mm.

The size range of above-mentioned each beveled structure 235 cooperates the design of the structure size of above-mentioned external insulation 2, can be in satisfaction The creepage distance of insulator 23 reduces the main diameter of upper insulator 23 to greatest extent under the premise of requiring, reduce manufacture difficulty.

Further, as shown in Fig. 1, Fig. 7 and Fig. 9~Figure 12,2000kV paper condenser provided by the utility model becomes Depressor casing, wherein current-carrying structures 5 include contact tube 51, and the lower end of contact tube 51 is connect with tail structure 4, contact tube 51 Upper end is connect with head construction 1；Head construction 1 includes conservator 11, cover board 12, conductive seal head 13, bellows 14 and terminal plate 15, conservator 11 is the tubular structure of inner hollow, offers first through hole on the bottom plate of conservator 11, opens up on the top plate of conservator 11 There is the second through-hole, the top of first through hole and conservator 11 on the bottom plate of conservator 11 is sequentially run through in the upper end of contact tube 51 from the bottom to top The second through-hole on plate extends to the top of conservator 11, and the inside of conservator 11 is filled with insulating oil, and the insulating oil inside conservator 11 is used In in the insulation shortage of oil in the first annular space 21, into the first annular space 21, supplementary insulation is oily, wherein can directly pass through first Through-hole carries out the supplement of insulating oil, and repairing hole can also be in addition opened up on the bottom plate of conservator 11, meanwhile, on the side wall of conservator 11 Oil-feed port is offered at its top, with oily to the inside isolated input of conservator 11；Third through-hole is offered on cover board 12, is covered Plate 12 is sheathed on contact tube 51 by third through-hole, and cover board 12 connect with the top plate of conservator 11 and closes second in which can be removably mounted to be led to Hole, conductive seal head 13 are sheathed on the top of contact tube 51 in which can be removably mounted, preferably, being mentioned using being threadedly coupled therebetween The quality of connection in high thread contact face, realizes the conducting of electric current, and bellows 14 is sheathed on the contact tube 51 above cover board 12 Outside, the lower end of bellows 14 connect in which can be removably mounted with cover board 12, and upper end and the conductive seal head 13 of bellows 14 can be removably mounted Ground connection, bellows 14 can carry out isolation protection to the contact tube 51 for extending to 12 top of cover board, while use bellows 14, pass through The expansion performance of bellows 14 adapts to the upper and lower flexible of contact tube 51；Terminal plate 15 is set to the top of conductive seal head 13, and Terminal plate 15 is electrically connected with conductive seal head 13, and terminal plate 15 is connect and passed through in the form of plane contact with conductive seal head 13 The fastening of the connectors such as bolt, to improve the contact quality of contact surface between the two, realizes the conducting of electric current.

Preferably, the outside of bellows 14 is also covered with protective cover 17, the top of protective cover 17 and conductive seal head 13 It seals with can be removably mounted and connects, it is close with the part, contact tube 51 and the conduction that further extend to the top of cover board 12 to contact tube 51 Junction and bellows 14 between end socket 13 are protected, and realize rain-proof, dust-proof effect.

Further, as shown in Fig. 1 and Fig. 8~Figure 10,2000kV paper condenser transformer provided by the utility model Casing, wherein interior insulation 3 includes core wrap-around tube 31, laminated aluminium foil 32 and multi-layer cable paper 33, and core wrap-around tube 31 is coaxially It is sheathed on contact tube 51, the lower end of core wrap-around tube 31 is connect with tail structure 4, and the upper end of core wrap-around tube 31 passes through positioning Ring flat-plate keeps coaxial with contact tube 51, and positioning is sliding contact between ring flat-plate and contact tube 51, generates displacement in contact tube 51 It can guarantee alignment between the two always in the process, form the second annular space 22 between core wrap-around tube 31 and contact tube 51, 32 alternate intervals of multi-layer cable paper 33 and laminated aluminium foil on core wrap-around tube 31, specifically, in core wrap-around tube 31 On multilayer-wound cable paper 33 first, one layer of aluminium foil 32 is then wound on the outside of cable paper 33, then again wraps around multi-layer cable Paper 33 is so arranged alternately multilayer, and finally winding cable paper 33 completes the production of interior insulation 3, and interior insulation 3 can be understood as In the series connection concentric cylinder electricity that 51 outer wrap aluminium foil 32 of contact tube is formed as pole plate, oil compression cable paper 33 as contrasted between solid dielectric Container.Interior insulation 3 reasonably selects shielding using the design method of " etc. nargin ", and the maximum radial field strength of interior insulation 3 is 5.13MV/m, harmful partial discharge inception voltage's calculated value 988.2kV, gliding spark discharge starting voltage calculated value 2994.5kV；Core Body wrap-around tube 31 uses brass tube, and the maximum outside diameter of interior insulation 3 is 824mm；The upper end of core wrap-around tube 31 and core wrap-around tube 31 lower end radially offers intercommunicating pore 311 respectively, and two intercommunicating pores 311 are connected to the first annular space 21 and the second annular space 22；It is interior Fuse gripping sleeve 34 is arranged in insulation 3, fuse gripping sleeve 34 includes cuff in the closing sleeve 341 in 3 outside of interior insulation, is clamped The outer surface of sleeve 341 is convexly equipped with connection lug 342, sets between the lower end surface of upper insulator 23 and the upper surface of connection sleeve 24 Set counter flange 343, counter flange 343 is coaxially sheathed on the outside of interior insulation 3, counter flange 343 respectively with upper insulator 23 The mucilage binding flange 231 of lower end, the connecting flange 241 that connects 24 upper end of sleeve connect with can be removably mounted, to realize upper insulator 23 With the connection connecting between sleeve 24, the medial surface of counter flange 343 protrudes from the inner surface of connection sleeve 24 and forms Step surface directed downwardly, closing sleeve 341 are installed on counter flange 343 in which can be removably mounted by connecting lug 342, so in guarantee The alignment of insulation 3 and external insulation 2, while can ensure that interior insulation 3 will not generate any diameter in transport, lifting and use process It is made to rotation and axial displacement, fuse gripping sleeve 34 of stainless steel material.

Further, as shown in Figure 10~Figure 12,2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model, Wherein, tail structure 4 includes current-carrying pedestal 41 and positioning seat 42, and current-carrying pedestal 41 connects with the sealing of the lower end surface of external insulation 2, fixed Position seat 42 is installed on the upper surface of current-carrying pedestal 41 in which can be removably mounted by bolt, realizes current potential conducting between the two, positioning seat 42 side surface connects with the sealing of the inner surface of external insulation 2, and the center of current-carrying pedestal 41 has been axially formed through hole along it, leads The lower end of fulgurite 51 connects with the through hole location sealing of current-carrying pedestal 41 through positioning seat 42, the lower end of core wrap-around tube 31 and The positioning of positioning seat 42 connects.

Further, as shown in FIG. 11 and 12,2000kV paper condenser transformer set provided by the utility model Pipe, wherein current-carrying structures 5 further include connecting terminal 52, locating cone 53 and pull rod 54, and pull rod 54 is coaxially set on contact tube 51 The lower end of inside, pull rod 54 connects with connecting terminal 52, and the upper end of pull rod 54 passes through elastic tensioning structure 16 and 1 phase of head construction It connects, the upper surface of connecting terminal 52 is abutted with the lower end surface of current-carrying pedestal 41, is applied by elastic tensioning structure 16 to pull rod 54 Upward pulling force, so that pull rod 54 applies upward power to connecting terminal 52, by 52 tight abutment of connecting terminal at current-carrying bottom On seat 41, guarantee current lead-through between the two；Preferably, the upper end of contact tube 51 passes through another elastic tensioning structural elasticity It is positioned at the inside of conservator 11, contact tube 51 applies upward power to current-carrying pedestal 41, thus by current-carrying pedestal 41, lower ceramic part 25, connection sleeve 24 tenses from the bottom to top, so being reliably connected each component part；Locating cone 53 is sheathed on pull rod On 54, and the lower end of locating cone 53 is abutted with connecting terminal 52, and locating cone 53 is the cone cell of diameter flaring from top to bottom, by setting Guiding function is played in the installation for setting 53 energy pair of wire connection terminals 52 of locating cone, supports connecting terminal 52 accurately with current-carrying pedestal 41 It connects.It should be noted that there is no concrete restrictions for the structure of elastic tensioning structure 16, as long as upward tensile ties 54 can be played The effect of (and contact tube 51), the utility model are not limited thereto.

Compared with prior art, as follows the advantages of the utility model:

2000kV oil-impregnated paper condenser type transformer bushing provided by the utility model can with 2000kV testing transformer is mating makes With, to 2000kV testing transformer play a part of insulation, support and circulation, fill up the blank of this technology.

The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model It encloses.Any those skilled in the art, it is made etc. under the premise of not departing from the conceptions and principles of the utility model With variation and modification, the range of the utility model protection should belong to.

Claims (10)

1. a kind of 2000kV oil-impregnated paper condenser type transformer bushing, which is characterized in that the 2000kV paper condenser transformer set Pipe includes head construction, external insulation, interior insulation, tail structure and current-carrying structures, the head construction, the current-carrying structures and institute It states tail structure to be from top to bottom sequentially connected with, and the current-carrying structures are electrically connected with the head construction, the tail structure respectively It connecing, the external insulation sleeve is set to the outside of the current-carrying structures, and the upper end of the external insulation connects with head construction sealing, The lower end of the external insulation connects with tail structure sealing, and the first ring is formed between the external insulation and the current-carrying structures Sky, the interior insulation are sheathed on the current-carrying structures and between the current-carrying structures and the external insulation, described interior exhausted The second annular space, and the inner surface of the outer surface of the interior insulation and the external insulation are formed between edge and the current-carrying structures Between there is gap, first annular space is connected to second annular space and fills out in first annular space and second annular space Equipped with insulating oil.

2. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 1, which is characterized in that the external insulation includes Upper insulator, connection sleeve and the lower ceramic part being from top to bottom sequentially tightly connected, the upper end of the upper insulator and the upper insulator Lower end is respectively formed with mucilage binding flange, the upper insulator by the mucilage binding flange that the upper end is arranged can be removably mounted with the head Portion's sealing structure connects, and the upper end of the mucilage binding flange that the upper insulator is arranged by its lower end and the connection sleeve can be torn open The sealing of dress ground connects, and the mucilage binding ratio for connecting mucilage binding flange described in sleeve is 0.41~0.45.

3. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 2, which is characterized in that outside the upper insulator Projection from top to bottom is formed with multiple beveled structures on surface, and each beveled structure is along the upper insulator circumferentially around convex On the outer surface of the upper insulator, the upper surface of each beveled structure is along the axis far from the upper insulator The conical surface that direction is gradually reduced, the beveled structure include multiple gamp structures and multiple umbellule structures, the gamp structure with From top to bottom alternate intervals are arranged the umbellule structure, and the diameter of the gamp structure is greater than the diameter of the umbellule structure, institute The nominal creepage distance for stating insulator is greater than 38000mm.

4. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 3, which is characterized in that the upper insulator includes More piece from top to bottom sequentially connected porcelain piece, inorganic bond combines between the adjacent porcelain piece of every two section, the upper insulator Upper section in the from top to bottom identical column of diameter, the middle section of the upper insulator in diameter flaring from top to bottom cone cell, it is described on The lower section of insulator is in the identical column of diameter from top to bottom, the diameter of the upper end of the upper insulator and the middle section of the upper insulator The diameter of upper end is equal, and the diameter of the lower section of the upper insulator is equal with the diameter of lower end in middle section of the upper insulator, described The top that the bottom of the lower section of upper insulator is located at the mucilage binding flange of the lower end of the upper insulator is equipped with bottom umbrella structure, along institute The axial direction of external insulation is stated, the thickness of the bottom umbrella structure is greater than the thickness of the gamp structure.

5. according to the described in any item 2000kV oil-impregnated paper condenser type transformer bushings of claim 2~4, which is characterized in that described The height of upper insulator is greater than 10000mm, and the outer diameter of the mucilage binding flange of the lower end of the upper insulator is greater than 1200mm.

6. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 4, which is characterized in that the upper insulator it is upper Section the beveled structure diameter be greater than or equal to 650mm, the upper section of the upper insulator the gamp structure protrusion described in The size of the outer surface of the upper section of upper insulator is 70mm~80mm, and the umbellule structure of the upper section of the upper insulator protrudes institute The size for stating the outer surface of the upper section of insulator is 50mm~60mm, the adjacent gamp structure of the upper section of the upper insulator Spacing between the umbellule structure is 70mm~75mm；

The gamp structure in the middle section of the upper insulator protrude the outer surface in the middle section of the upper insulator size be 60mm~ 65mm, and it is 45mm that the umbellule structure in the middle section of the upper insulator, which protrudes the size of the outer surface in the middle section of the upper insulator, ~50mm, the spacing between the adjacent gamp structure and the umbellule structure in the middle section of the upper insulator be 65mm~ 75mm；

The diameter of the beveled structure of the lower section of the upper insulator is less than or equal to 1100mm, the institute of the lower section of the upper insulator Stating gamp structure and protruding the size of outer surface of the lower section of the upper insulator is 50mm~55mm, and the lower section of the upper insulator The size that the umbellule structure protrudes the outer surface of the lower section of the upper insulator is 35mm~40mm, the upper section of the upper insulator Spacing between the adjacent gamp structure and the umbellule structure is 55mm~65mm.

7. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 1, which is characterized in that the current-carrying structures packet Contact tube is included, the lower end of the contact tube is connect with the tail structure, and the upper end of the contact tube and the head construction connect It connects；The head construction includes conservator, cover board, conductive seal head, bellows and terminal plate, and the conservator is the cylinder of inner hollow Shape structure offers first through hole on the bottom plate of the conservator, the second through-hole, the conduction is offered on the top plate of the conservator The institute on the top plate of the first through hole on the bottom plate of the conservator and the conservator is sequentially run through in the upper end of pipe from the bottom to top The top that the second through-hole extends to the conservator is stated, third through-hole is offered on the cover board, the cover board is logical by the third Hole is sheathed on the contact tube, and the cover board connect with the top plate of the conservator and close second through-hole in which can be removably mounted, The conductive seal head is sheathed on the top of the contact tube in which can be removably mounted, and the bellows-sheathed, which is set to, to be located above the cover board The contact tube outside, the lower end of the bellows connect in which can be removably mounted with the cover board, the upper end of the bellows with The conductive seal head connects in which can be removably mounted, the terminal plate be set to the conductive seal head top, and the terminal plate with The conductive seal head electrical connection.

8. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 7, which is characterized in that the interior insulation includes Core wrap-around tube, laminated aluminium foil and multi-layer cable paper, the core wrap-around tube are coaxially sheathed on the contact tube, the core The lower end of body wrap-around tube is connect with the tail structure, and the upper end of the core wrap-around tube passes through positioning ring flat-plate and the contact tube It keeps coaxial, forms second annular space, cable paper and multilayer described in multilayer between the core wrap-around tube and the contact tube It winds to the aluminium foil alternate intervals and is coated on the core wrap-around tube, and be wound with multilayer between every two layers of aluminium foil The cable paper, the upper end of the core wrap-around tube radially offer respectively with the lower end of the core wrap-around tube and are connected to Hole, two intercommunicating pores are connected to first annular space and second annular space；Fuse gripping sleeve, institute are arranged in the interior insulation State fuse gripping sleeve be able to maintain between the interior insulation and the contact tube and between the interior insulation and the external insulation it is same Axis positioning.

9. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 8, which is characterized in that the tail structure packet Current-carrying pedestal and positioning seat are included, the current-carrying pedestal connects with the sealing of the lower end surface of the external insulation, and the positioning seat can be removably mounted Ground is installed on the upper surface of the current-carrying pedestal, and the side surface of the positioning seat connects with the sealing of the inner surface of the external insulation, The center of the current-carrying pedestal has been axially formed through hole along it, and the lower end of the contact tube is through the positioning seat and the load The through hole location sealing of stream pedestal connects, and the lower end of the core wrap-around tube connects with positioning seat positioning.

10. 2000kV oil-impregnated paper condenser type transformer bushing according to claim 9, which is characterized in that the current-carrying structures It further include connecting terminal, locating cone and pull rod, the pull rod is coaxially set to the inside of the contact tube, the lower end of the pull rod Connect with the connecting terminal, the upper end of the pull rod is connected by elastic tensioning structure with the head construction, the wiring The upper surface of terminal is abutted with the lower end surface of the current-carrying pedestal, and the locating cone is sheathed on the pull rod, and the positioning The lower end of cone is abutted with the connecting terminal.