CN209544113U - Bushing shell for transformer - Google Patents
Bushing shell for transformer Download PDFInfo
- Publication number
- CN209544113U CN209544113U CN201920435797.6U CN201920435797U CN209544113U CN 209544113 U CN209544113 U CN 209544113U CN 201920435797 U CN201920435797 U CN 201920435797U CN 209544113 U CN209544113 U CN 209544113U
- Authority
- CN
- China
- Prior art keywords
- current
- carrying bar
- transformer
- insulation tube
- bushing shell
- 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.)
- Active
Links
Landscapes
- Insulators (AREA)
Abstract
This application discloses a kind of bushings shell for transformer, comprising: insulation tube, axially disposed is hollow structure；Capacitor core, including wearing the current-carrying bar of insulation tube and positioned at the multilayer dielectric layer and multi-layer capacity screen insulation tube inside and successively wound on the outside of current-carrying bar, wherein, current-carrying bar extends one end except insulation tube and is fixedly connected with the first connecting terminal and is electrically connected with the first connecting terminal；End shield connector is electrically connected with the end shield in capacitor core, for being grounded end shield when bushing shell for transformer is run.Bushing shell for transformer structure provided by the present application is simple, can save cost, reduces production process and improve production efficiency.
Description
Technical field
This application involves technical field of electric power transmission, more particularly to a kind of bushing shell for transformer.
Background technique
Bushing shell for transformer is widely applied high tension apparatus in electric system, it is fixedly mounted on the shell of transformer,
One end is exposed outside transformer, is electrically connected with external current conductors such as cables, and the other end protrudes into inside transformer, in transformer
Inner lead electrical connection, so that the output electric current of transformer is by the bushing shell for transformer guiding external current conductors such as cable, or
Electric current in the external current conductors such as cable is oriented to transformer by bushing shell for transformer.
Condenser-type terminal is divided into paper condenser and gummed paper condenser type at present, and paper condenser divides according to current-carrying structures
To wear cable formula and conduit current-carrying formula, wherein conduit current-carrying formula is divided into direct-type again by the connection type of connecting terminal and casing and worn
Rod-type.
Present inventor has found that structure is complicated for existing Oil-impregnated Paper Condenser Bushing in History in long-term research, element compared with
It is more, it is easy to cause poor contact between element.
Utility model content
The purpose of the application is to provide a kind of bushing shell for transformer, can save cost, reduces production process and improve life
Produce efficiency.
In order to achieve the above objectives, the application the technical solution adopted is that: a kind of bushing shell for transformer is provided, comprising: insulation tube,
Axially disposed is hollow structure；Capacitor core, including wearing the current-carrying bar of the insulation tube and being located in the insulation tube
Portion and the multilayer dielectric layer and multi-layer capacity screen successively wound on the outside of the current-carrying bar, wherein the current-carrying bar extends institute
One end except insulation tube is stated to be fixedly connected with the first connecting terminal and be electrically connected with first connecting terminal；End shield connector,
It is electrically connected with the end shield in the capacitor core, for being grounded the end shield in bushing shell for transformer operation.
Wherein, further includes: oil conservater is fixed on one end of the insulation tube and is connected to the insulation tube, wherein is described
Described one end of current-carrying bar passes through the oil conservater from the insulation tube, with first wiring being located at outside the oil conservater
Terminal is fixedly connected.
Wherein, the current-carrying bar is set as hollow structure along the axial direction, the current-carrying bar be located at the insulation tube and/or
Several through-holes are equipped with inside the oil conservater and not by the side wall that the insulating layer and the capacitance plate cover.
Wherein, further includes: first end cover covers the current-carrying bar and extends the other end except the insulation tube, described
First end cover is fixed with the second connecting terminal far from the side of the current-carrying bar, the first end cover be electrically connected the current-carrying bar with
Second connecting terminal.
Wherein, further includes: round nut is closely sheathed on the current-carrying bar periphery and covers the other end of the insulation tube,
The first end cover abuts end face of the round nut far from the insulation tube side simultaneously；Gasket, the gasket are ring junction
Structure, the inner ring surface and outer ring surface of the gasket are non-disc, wherein the gasket is fastened on the current-carrying bar and the round spiral shell
Between mother, the current-carrying bar is bonded with inner ring surface matching, and the round nut is bonded with outer ring surface matching.
Wherein, it includes: that the outer ring surface is equipped with several that the inner ring surface of the gasket and outer ring surface, which are non-circular mask body,
First card slot, the inner wall at gasket described in the round nut face are equipped with first matched corresponding with first card slot and block
Block；And/or the inner ring surface is equipped with several second fixture blocks, the outer wall at gasket described in the current-carrying bar face is provided with and institute
State corresponding the second card slot matched of the second fixture block.
Wherein, the insulation tube includes the first insulating sublayer pipe and the second insulating sublayer pipe by flanged joint, and described first
One end of flanged joint described in insulating sublayer Guan Buyu connects the oil conservater, flanged joint described in the second insulating sublayer Guan Buyu
One end connect the round nut.
Wherein, the end shield connector includes: earthing rod, and the earthing rod is conduct piece, including the extraction with the end shield
The first end and the second end opposite with the first end of line connection, wherein described in being plugged on when the earthing rod
When in the mounting hole on flange, the second end of the earthing rod is far from the mounting hole；Insulating part is set in described connect
The periphery of ground column, for the hole wall of the mounting hole and the outer wall of the earthing rod to be isolated；Compressing member, including be set in described exhausted
The annular slab of edge part periphery and the peripheral wall extended from the annular slab inner circumferential, wherein when the compressing member is described by passing through
The first bolt on annular slab is assemblied on the flange base and to be located in the earthing rod and the insulating part described
When in mounting hole, the compressing member is electrically connected with the flange, and the peripheral wall of the compressing member is far from the flange；Ground connection
Seat, is provide with the compressing member and the second end of the earthing rod is housed in the grounding base, and then is electrically connected
The compressing member and the earthing rod.
Wherein, the insulating part is set in the periphery of the earthing rod, and the earthing rod and institute by pouring technology
The outer wall for stating insulating part contact is equipped with several first grooves.
Wherein, the lead-out wire of the end shield is wrapped on the second bolt, the first end of the earthing rod be equipped with
Corresponding the second groove matched of second bolt, so that second bolt is detachably assemblied in second groove,
And then realize the connection between the lead-out wire of the end shield and the first end of the earthing rod.
The beneficial effect of the application is: current-carrying bar in capacitor core is extended one end and first outside insulation tube by the application
Connecting terminal is fixedly connected and is electrically connected with the first connecting terminal, so that the electric current in transformer can flow to by current-carrying bar
Electric current in one connecting terminal or the first connecting terminal can flow to transformer by current-carrying bar, that is to say, that the application is straight
It connects and carries out current-carrying using the current-carrying bar in capacitor core, bushing shell for transformer generally all includes in capacitor core compared to the prior art
Wrap-around tube and the current-carrying bar that is arranged in wrap-around tube, structure is simple, can save cost, and no longer need to carry out wrap-around tube
Insulation production between current-carrying bar, can reduce production process, improve production efficiency.And the bushing shell for transformer in the application is also
It including the end shield connector being electrically connected with end shield in capacitor core, can either guarantee the normal operation of bushing shell for transformer, can also facilitate
Ground carries out high-potting to bushing shell for transformer.
Also gasket is arranged between current-carrying bar and round nut in the bushing shell for transformer in the application simultaneously, which is ring junction
Structure, inner ring surface and outer ring surface be it is non-circular, can be avoided current-carrying bar and rotated in bushing shell for transformer.
In addition the end shield connector of the bushing shell for transformer in the application specifically includes earthing rod, insulating part, compressing member and connects
Ground seat can carry out capacitance, dielectric loss measurement to bushing shell for transformer when carrying out high-potting, and normal in bushing shell for transformer
End shield is grounded when operation, guarantees that the field strength distribution of capacitor core is uniform.Simultaneously compared with prior art, that no setting is required is small by the application
Porcelain piece, structure is simple, compact, and in assembly, it is only necessary to successively assemble earthing rod, insulating part, compressing member, and then by compressing member
It is fixed on flange by the first bolt, then grounding base is located on compressing member, it is convenient, fast.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the schematic diagram of the section structure in one embodiment of the application bushing shell for transformer；
Fig. 2 is the enlarged diagram in Fig. 1 at A；
Fig. 3 is the enlarged diagram in Fig. 2 at B；
Fig. 4 is the enlarged diagram in Fig. 1 at C；
Fig. 5 is the configuration schematic diagram of current-carrying bar, round nut and gasket in an application scenarios；
Fig. 6 is the positive structure schematic of gasket in an application scenarios；
Fig. 7 is the positive structure schematic of gasket in another application scene；
Fig. 8 is the enlarged diagram in Fig. 1 at D；
Fig. 9 is the enlarged diagram in Fig. 8 at E；
Figure 10 is the schematic diagram of the section structure of earthing rod and insulating part in Fig. 9；
Figure 11 is the cut-away section structural schematic diagram of flange in Fig. 9.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, rather than whole embodiments.Based on this
Embodiment in application, those of ordinary skill in the art are obtained every other under the premise of not making creative labor
Embodiment shall fall in the protection scope of this application.
Refering to fig. 1 and Fig. 2, Fig. 1 be one embodiment of the application bushing shell for transformer the schematic diagram of the section structure, Fig. 2 is Fig. 1
Enlarged diagram at middle A.Bushing shell for transformer in the application can be oil-impregnated paper condenser type transformer bushing, be also possible to other
The casing of type, herein with no restrictions.Bushing shell for transformer 1000 is arranged in transformer (not shown), is specially fixed on transformation
On the shell of device, one end extends the outside of transformer, and the other end protrudes into the inside of transformer, for by the electricity in transformer
Conductance is to external current conductors such as cables, or by the conduct current transformer in the external current conductors such as cable.In the present embodiment,
Bushing shell for transformer 1000 includes insulation tube 1010, capacitor core 1020 and end shield connector 1030.
Axially disposed insulation tube 1010 is hollow structure, as hollow pipe.Insulation tube 1010 uses fiber such as glass fibers
Dimension, aramid fiber etc. are Wrapping formed, or using the manufacture of other techniques such as molding.
Capacitor core 1020 include wear the current-carrying bar 1021 of insulation tube 1010 and be located at the inside of insulation tube 1010 and
The multilayer dielectric layer and multi-layer capacity screen that 1021 outside of current-carrying bar is successively wound, wherein for the clarity of Fig. 1, multilayer dielectric layer
It is indicated as a whole with label 1022 with multi-layer capacity screen.Current-carrying bar 1021 extends one except insulation tube 110 simultaneously
End 10211 is fixedly connected with the first connecting terminal 1040 and is electrically connected with the first connecting terminal 1040.Specifically, the first terminals
Son 1040 is for the external current conductors such as connecting cable, when current-carrying bar 1021 is electrically connected with the first connecting terminal 1040, current-carrying bar
The electrical connection of the external current conductors such as 1021 cables being connect with the first connecting terminal 1040.In the present embodiment, capacitor core
Current-carrying bar 1021 in 1020 is specifically used for current-carrying, so that the electric current in transformer flows into the first terminals by current-carrying bar 1021
Son 1040, and then the external current conductors such as the cable connecting with the first connecting terminal 1040 are flowed into, or make the external conductives such as cable
Electric current in body passes sequentially through the first connecting terminal 1040, current-carrying bar 1021 flows to transformer.To become compared to the prior art
Depressor casing had both included the wrap-around tube in capacitor core, also included being threaded through in wrap-around tube, for the current-carrying bar of current-carrying, this implementation
1000 structure of bushing shell for transformer in mode is simple, can save cost, and exhausted between wrap-around tube and current-carrying bar without carrying out
Edge production, can reduce production process, improve production efficiency.
End shield (not shown) in end shield connector 1030 and capacitor core 1020, i.e., outermost one layer of electricity in capacitor core 1020
Rong Ping electrical connection guarantees the field strength inside bushing shell for transformer 1000 for being grounded end shield when bushing shell for transformer 1000 is run
It is evenly distributed, and capacitance, dielectric loss measurement is carried out to bushing shell for transformer 1000 when carrying out high-potting.
From the above, it is seen that on the one hand the bushing shell for transformer 1000 in the application directly uses capacitor core 1020
In 1021 transmission transformer of current-carrying bar and the external current conductors such as cable between electric current, i.e. progress current-carrying, structure is simple, can
Production process is reduced, production efficiency is improved；On the other hand it is provided with end shield connector 1030, both can guarantee bushing shell for transformer 1000
It operates normally, can also be convenient for high-potting.
In an application scenarios, one end 10211 of current-carrying bar 1021 is directly fixedly connected with the first connecting terminal 1040, and two
Without other connecting elements between person, thus the electric current transmitted between current-carrying bar 1021 and the first connecting terminal 1040 without going past
Other elements can reduce transition of the electric current in transmission process.In addition current-carrying bar 1021 directly with the first connecting terminal 1040
It is fixedly connected with the element number that can also reduce in bushing shell for transformer 1000, guarantees that contact is good between element.Certainly at other
In application scenarios, as long as guaranteeing that current-carrying bar 1021 can be electrically connected with the first connecting terminal 1040, one end of current-carrying bar 1021
10211 can also be fixedly connected by other connecting elements with the first connecting terminal 1040, herein with no restrictions.
Since the current-carrying bar 1021 in the application needs the electric current between external current conductors and transformer such as transmission cable, because
This current-carrying bar 1021 during bushing shell for transformer 1000 is run needs to carry biggish electric current, and then generates more heat
Amount.In order to disperse the heat of the generation of current-carrying bar 1021 in time, in an application scenarios, transformer oil is filled in insulation tube 1010
(not shown).When bushing shell for transformer 1000 works, the higher transformer oil of temperature and the lower change of temperature in insulation tube 1010
Depressor fry dried food ingredients gives birth to convection current, to disperse the heat of the generation of current-carrying bar 1021, avoids its temperature excessively high.And in the application scenarios,
In order to which insulation tube 1010 can be full of transformer oil under any temperature, operating condition, with continued reference to Fig. 1 and Fig. 2, transformer
Casing 1000 further includes oil conservater 1050.When the volume of the transformer oil in insulation tube 1010 is swollen with temperature, operating condition
When swollen or diminution, oil conservater 1050 can play the role of adjusting oil mass.
Specifically, oil conservater 1050 is fixed on one end 10101 of insulation tube 1010 and is connected to insulation tube 1010, carries simultaneously
The self-insulating pipe 1010 in one end 10211 of flow post 1021 passes through oil conservater 1050, with the first wiring being located at outside oil conservater 1050
Terminal 1040 is fixedly connected.When the volume expansion of transformer oil in insulation tube 1010, extra transformer in insulation tube 1010
Oil stream plays the role of oil storage to oil conservater 1050, i.e. oil conservater 1050 at this time, when the volume of transformer oil in insulation tube 1010
When diminution, the transformer oil in oil conservater 1050 flows to insulation tube 1010, i.e. oil conservater 1050 plays the role of repairing at this time.
In the application scenarios, with continued reference to Fig. 1 and Fig. 2, in order to further increase the heat dissipation performance of current-carrying bar 1021, carry
Flow post 1021 is also hollow pipe, i.e., axially disposed is hollow structure, while current-carrying bar 1021 is located at insulation tube 1010 and/or storage
Several through-holes 10213 are equipped with inside Oil Tank 1050 and not by the side wall 10212 that insulating layer and capacitance plate cover, wherein if
A dry through-hole 10213 can be both only positioned in insulation tube 1010 or oil conservater 1050, can also be distributed in insulation tube 1010 simultaneously
In oil conservater 1050.By the way that through-hole 10213 is arranged, transformer oil can form circulation inside and outside current-carrying bar 1021,
Significantly reduce the temperature of current-carrying bar 1021.Wherein significantly, since electric current has skin effect, i.e. electric current passes through conductor
When, since induction effect causes current distribution in conductor boundary uneven, the density closer to conductive surface electric current is bigger, especially
When being that the frequency of electric current is very high, electric current is almost only transmitted on the surface of conductor, and the inside of conductor f hardlyes pass through electric current, therefore this
Application scenarios set hollow pipe rather than solid tubes for current-carrying bar 1021, not only will not influence the current-carrying efficiency of current-carrying bar 1021
Material can also be saved.
With continued reference to Fig. 1, in order to further increase the mobility of transformer oil, several through-holes 10213 are distributed in current-carrying
Bar 1021 is by the two sides of insulating layer and capacitance plate overlay area 10221.By the way that several through-holes 10213 are distributed in region
10221 two sides, compared to the side for being positioned only at region 10221, mobility is stronger, can accelerate dissipating for current-carrying bar 1021
Heat.
Refering to fig. 1, Fig. 2 and Fig. 3, in an application scenarios, bushing shell for transformer 1000 further includes second end cover 1060, is used
One end 10211 of oil conservater 1050 is passed through in capping current-carrying bar 1021.Specifically, before assembling transformer casing 1000, the
Two end caps 1060 do not cover current-carrying bar 1021, so as to carry out prerinse to current-carrying bar 1021 to guarantee the cleaning of current-carrying bar 1021
Degree, while after carrying out prerinse to bushing shell for transformer 1000, second end cover 1060 is sealed on to one end of current-carrying bar 1021
10211, one end 10211 of second end cover 1060 and current-carrying bar 1021 is detachably connected or non-dismountable connection at this time, such as the
Two end caps 1060 are connected through a screw thread with current-carrying bar 1021, are interference fitted connection, or second end cover 1060 is directly welded at
On current-carrying bar 1021, so that second end cover 1060 can be outside to avoid transformer oil when bushing shell for transformer 1000 operates normally
Outflow is invaded by extraneous moisture.
Wherein, the inner sidewall that current-carrying bar 1021 passes through one end 10211 of oil conservater 1050 has stage portion 10214, with shape
At the first contact surface 10215 and the second contact surface 10216 contacted with second end cover 1060.Second end cover 1060 includes flat simultaneously
The pillar 1062 of plate 1061 and 10611 protrusion of plate face from plate 1061, when second end cover 1060 covers current-carrying bar 1021
When one end 10211, pillar 1062 is protruded into current-carrying bar 1021, and the plate face 10611 of plate 1061 is made to abut the first contact surface
10215, the end face 10621 of pillar 1062 abuts the second contact surface 10216.
Refering to fig. 1 and Fig. 4, in an application scenarios, bushing shell for transformer 1000 further includes first end cover 1070.First end cover
1070 capping current-carrying bars 1021 extend the other end 10217 except insulation tube 1010, while first end cover 1070 is far from current-carrying
The side of bar 1021 is fixed with the second connecting terminal 1080, and first end cover 1070 is electrically connected current-carrying bar 1021 and the second connecting terminal
1080.Specifically, first end cover 1070 is connect with current-carrying bar 1021 by modes such as screw threads, and the second connecting terminal 1080, which is located at, to be become
The inside of depressor is connect with the inner lead of transformer, and the second connecting terminal 1080 is fixed in first end cover 1070, first end
Lid 1070 is conducting element, so that the output electric current of transformer is successively from the second connecting terminal 1080, first end cover 1070, current-carrying
Bar 1021 flows to the first connecting terminal 1040.
Wherein, in order to cover the other end 10102 of insulation tube 1010, i.e. insulation tube 1010 is not connect with oil conservater 1050
One end, bushing shell for transformer 1000 further include round nut 1090.Round nut 1090 is closely sheathed on the periphery of current-carrying bar 1021, and solid
It is scheduled on the other end 10102 of insulation tube 1010, to cover the other end of insulation tube 1010 by the end face of round nut 1090
10102, while first end cover 1070 abuts end face of the round nut 1090 far from 1010 side of insulation tube, and passes through the elements such as bolt
It is fixedly connected with round nut 1090.Wherein it should be noted that in other embodiments, round nut can also be not provided with
1090, but the other end 10217 of current-carrying bar 1021 and the other end of insulation tube 1010 are covered by first end cover 1070 simultaneously
10102。
In an application scenarios, with continued reference to Fig. 4, round nut 1090 is equipped with the fuel outlet being connected to insulation tube 1010
1200, matched bleeder plug 1210 is equipped in fuel outlet 1200.Specifically, the transformer oil inside insulation tube 1010 needs
When replacement, bleeder plug 1210 is removed, at this time since the end of bushing shell for transformer 1000, insulation tube is arranged in bleeder plug 1210
Transformer oil inside 1010 can flow only.
Bushing shell for transformer 1000 in above embodiment uses the direct current-carrying of current-carrying bar 1021 in capacitor core 1020,
And since the electric current for generally flowing through current-carrying bar 1021 is larger, the external current conductors such as cable being connect with the first connecting terminal 1040 compared with
Slightly, therefore in the operation of bushing shell for transformer 1000 biggish torque force can be generated to current-carrying bar 1021, and current-carrying bar in order to prevent
1021 rotate when bushing shell for transformer 1000 is run, while facilitating installation fixed and not vulnerable, refering to Fig. 4 and Fig. 5,
In another embodiment of the application, bushing shell for transformer 1000 further includes gasket 1100.
Gasket 1100 is ring structure, and the inner ring surface 1110 of gasket 1100 and outer ring surface 1120 are non-disc, wherein
Gasket 1100 is fastened between current-carrying bar 1021 and round nut 1090, and current-carrying bar 1021 is matched with the inner ring surface 1110 of gasket 1100
Fitting, round nut 1090 are bonded with the matching of the outer ring surface 1120 of gasket 1100.Due to the outer ring surface 1120 and inner ring of gasket 1100
Face 1110 is non-disc, and gasket 1100 is fastened between current-carrying bar 1021 and round nut 1090, therefore gasket 1100 is opposite
It can not be rotated in round nut 1090, and then match the current-carrying bar 1021 being bonded with gasket 1100 can not also turn with respect to round nut 1090
It is dynamic, and since round nut 1090 is fixedly connected with insulation tube 1010,1021 opposing insulation pipe 1010 of current-carrying bar can not rotate,
I.e. no matter the external current conductors such as cable generate great torque force, and current-carrying bar 1021 will not be in 1000 transfer of bushing shell for transformer
It is dynamic, and be different from the sealing ring clamping mode of easy failure in the prior art and be inconvenient to the screw thread side of screwing operated
Formula, gasket 1100 facilitate installation to fix.Wherein it should be noted that present embodiment in order to installation convenience, by gasket
1100 are arranged between round nut 1090 and current-carrying bar 1021, but the application is not intended to limit the position of gasket 1100, at other
In embodiment, gasket 1100 can also be arranged between such as current-carrying bar 1021 and oil conservater 1050, current-carrying bar 1021 and
Other equal positions appropriate between one end cap 1070.
In an application scenarios, refering to Fig. 5, Fig. 6 and Fig. 7, the inner ring surface 1110 and outer ring surface 1120 of gasket 1100 are
Non-circular mask body includes: that the outer ring surface 1120 of gasket 1100 is equipped with several first card slots 1121,1090 face gasket of round nut
Inner wall at 1100 is equipped with the first fixture block 1092 matched corresponding with the first card slot 1121, the outer ring surface 1120 of gasket 1100 and
The inner wall of round nut 1090 is mutually clamped to match and be bonded by the first fixture block 1092 with the first card slot 1121, wherein the first card slot
1121 and first fixture block 1092 quantity correspond to it is identical, can be one, four or more, herein with no restrictions.Another
In application scenarios, the inner ring surface 1110 and outer ring surface 1120 of gasket 1100 are the inner ring that non-circular mask body includes: gasket 1100
Face 1110 is equipped with several second fixture blocks 1111, and the outer wall at 1021 face gasket 1100 of current-carrying bar is provided with and the second fixture block 1111
Corresponding the second card slot 10218 matched, the inner ring surface 1110 of gasket 1100 and the outer wall of current-carrying bar 1021 pass through the second fixture block
1111 and second card slot 10218 be mutually clamped and match fitting, wherein the quantity pair of the second card slot 10218 and the second fixture block 1111
Answer it is identical, can for one, three, four more, herein with no restrictions.It should be noted that in other application scenarios,
The inner ring surface 1110 and outer ring surface 1120 of gasket 1100 are the inner ring surface 1110 that non-circular mask body can also include: gasket 1100
It is ellipsoid or other shaped faces with outer ring surface 1120.Wherein it should be noted that as long as the application gasket 1100 is fastened on load
After between flow post 1021 and round nut 1090, current-carrying bar 1021 can not be freely rotated, at this to the inner ring surface of gasket 1100
1110 and outer ring surface 1120 shape with no restrictions.
In an application scenarios, gasket 1100 is using the center in section as symmetric points along the section perpendicular to central shaft
Zhou duicheng tuxing (as shown in Figure 6) or centrosymmetric image (as shown in Figure 7), to guarantee the whole uniform force of gasket 1100, energy
Bear bigger pressure.
In an application scenarios, refering to Fig. 4, further for the convenience of installation, round nut 1090 is far from insulation tube
The end face of 1010 sides is equipped with the third groove 1091 that is caught in for gasket 1100, first end cover 1070 simultaneously with round nut 1090 and
The end face of gasket 1100 abuts.Specifically, during installation, current-carrying bar 1021 is first worn into insulation tube 1010 and round nut 1090,
Then it is put into third groove 1091 from direct side of the round nut 1090 far from insulation tube 1010 by gasket 1100, makes gasket
1100 inner ring surface 1110 is bonded with current-carrying bar 1021, and outer ring surface 1120 is bonded with round nut 1090, final to guarantee current-carrying bar
1021 can not rotate.
In an application scenarios, refering to fig. 1, Fig. 2, Fig. 4 and Fig. 8, insulation tube 1010 includes being connected by flange 1011
First insulating sublayer pipe 1012 and the second insulating sublayer pipe 1013, one end that the first insulating sublayer pipe 1012 is not connect with flange 1011, i.e.,
The connection of one end 10101 oil conservater 1050 of insulation tube 1010, one end that the second insulating sublayer pipe 1013 is not connect with flange 1011, i.e.,
The other end 10102 of insulation tube 1010 connects round nut 1090.When bushing shell for transformer 1000 is assembled on transformer, transformation
Device casing 1000 is fixed on the shell of transformer by flange 1011, while the second insulating sublayer pipe 1013 protrudes into the interior of transformer
Portion, the first insulating sublayer pipe 1012 extend the outside of transformer.Wherein extend the first external insulating sublayer pipe to protect
1012,1012 outer peripheral surface of the first insulating sublayer pipe is coated with insulating layer 1014, and insulating layer 1014 is integrated injection molding silicon rubber
Full skirt, wherein silicon rubber umbrella skirt has good hydrophobicity and ageing resistance, and service life is high, can the first son of effective protection absolutely
Edge pipe 1012.
In above embodiment, by the gasket that ring structure is arranged between current-carrying bar 1021 and round nut 1090
1100, and the inner ring surface 1110 of gasket 1100 and outer ring surface 1120 be it is non-circular, current-carrying bar 1021 can be guaranteed in transformer
It can not be rotated in casing 1000.
Refering to Fig. 9 to Figure 11, in another embodiment of the application, end shield connector 1030 is specifically included: earthing rod 1031,
Insulating part 1032, compressing member 1033 and grounding base 1034.
Earthing rod 1031 is conduct piece, including the first end 10311 and the second end 10312 being oppositely arranged, earthing rod
1031 first end 10311 is connect with the lead-out wire 1035 of end shield (not shown), and works as lead-out wire 1035 and first end
When 10311 connection, directly it is electrically connected between earthing rod 1031 and lead-out wire 1035, wherein when earthing rod 1031 is plugged on flange
When in the mounting hole 10111 on 1011, the second end 10312 of earthing rod 1031 is far from mounting hole 10111；Insulating part 1032 by
Insulating materials is made, and is set in the periphery of earthing rod 1031, for be isolated mounting hole 10111 hole wall and earthing rod 1031 it is outer
Wall, that is to say, that the setting of insulating part 1032 makes to be not directly contacted between earthing rod 1031 and flange 1011；Compressing member 1033 wraps
The peripheral wall 10332 for being set in the annular slab 10331 of 1032 periphery of insulating part and extending from 10331 inner circumferential of annular slab is included, end is worked as
When screen connector 1030 is mounted on bushing shell for transformer 1000, compressing member 1033 is by passing through the first bolt on annular slab 10331
1036 are assemblied on flange 1011 and are located in earthing rod 1031 and insulating part 1032 in mounting hole 10111, and when compression
When part 1033 is fixed on flange 1011, compressing member 1033 is electrically connected with flange 1011, and the peripheral wall 10332 of compressing member 1033 is separate
Flange 1011；Grounding base 1034 is provide with compressing member 1033 and the second end of earthing rod 1,031 10312 is housed in grounding base
In 1034, and then it is electrically connected compressing member 1033 and earthing rod 1031, that is to say, that when grounding base 1034 is located at compressing member 1033
When upper, it was electrically connected between flange 1011, grounding base 1034 and earthing rod 1031.In an application scenarios, compressing member 1033 is connect
Ground seat 1034 is identical as earthing rod 1031, is conduct piece, and earthing rod 1031, compressing member 1033 and grounding base 1034 can be equal
It is made of materials such as aluminium, copper, stainless steels.
Wherein, end shield connector 1030 is pre-assembled before the normal operation of bushing shell for transformer 1000: earthing rod 1031 is inserted
It sets in the mounting hole 10111 of flange 1011, and connect its first end 10311 with the lead-out wire 1035 of end shield, then will
Insulating part 1032 is set in the outside of earthing rod 1031, and further, compressing member 1033 is fixed on by the first bolt 1036
Earthing rod 1031 and insulating part 1032 are located in mounting hole 10111 on flange 1011, are finally provide with grounding base 1034
It is housed in the second end 10312 of earthing rod 1031 in grounding base 1034 on compressing member 1033, wherein grounding base 1034
Can be connected through a screw thread, be interference fitted connection etc. modes be located on compressing member 1033.It has been assembled by end shield connector 1030
Bi Hou, since flange 1011 is grounded by the shell (not shown) of transformer, earthing rod 1031 passes sequentially through grounding base
1034, end shield, is grounded to realize, finally guarantees transformer by compressing member 1033, flange 1011 and transformer case ground connection
Field strength distribution inside casing 1000 is uniform.And when carrying out high-potting to bushing shell for transformer 1000, directly dismantle grounding base
1034, at this time due between earthing rod 1031 and flange 1011 pass through insulating part 1032 insulate, earthing rod 1031 no longer with
Flange 1011 is electrically connected, and then end shield is no longer grounded, may finally capacitance, dielectric loss to bushing shell for transformer 1000 survey
Amount.And after high-potting, grounding base 1034 is directly assembled on the outside of compressing member 1033 to guarantee that end shield connects again
Ground.
From the above, it is seen that the end shield connector 1030 in present embodiment is without increasing small porcelain piece, structure is simple,
When being conducive to the miniaturization of bushing shell for transformer 1000, and assembling, earthing rod 1031 and insulating part 1032 are being placed on peace
In dress hole 10111 and after being arranged compressing member 1033, the first bolt 1036 and grounding base 1034, assembly side are directly screwed
Just.In addition when carrying out high-potting, it need to only dismantle and remove grounding base 1034, and at this time due to grounding base 1034 and earthing rod
The case where 1031 are in discrete state, and staff can observe directly earthing rod 1031, with timely in its existing defects
It is replaced, it is ensured that Earthing Reliability.
In an application scenarios, earthing rod 1031 is cylindrical body, and in order to further reduce the volume of end shield connector 1030,
And invasion, the insulating part such as guarantee the leakproofness between earthing rod 1031 and insulating part 1032 and avoid external humidification, dust
1032 are directly set in the periphery of earthing rod 1031 by pouring technology.Wherein when preparing end shield connector 1030, by earthing rod
1031 are put into machine and then are directly poured the insulating materials such as polytetrafluoroethylene (PTFE) or epoxy resin in the outside of earthing rod 1031, into
And form insulating part 1032.Insulating part 1032 is formed by the directly casting in the outside of earthing rod 1031, makes earthing rod 1031 and absolutely
Contacted between edge part 1032 securely, good seal performance and compact-sized, there is no need to install sealing ring additional again, can effectively reduce
The volume of end shield connector 1030.Certainly in other application scenarios, earthing rod 1031 can also be independent of one another with insulating part 1032,
It is detachably assembled together, herein with no restrictions.
Further, in the application scenarios in order to increase the contact area between earthing rod 1031 and insulating part 1032 with
Enhancing contact fastness between the two, refering to fig. 10, the outer wall that earthing rod 1031 is contacted with insulating part 1032 is equipped with several the
One groove 10313.Wherein the first groove 10313 is arranged around earthing rod 1031, and quantity can be 1,2,3 or more
It is multiple, herein with no restrictions.In addition the application to the depth of the first groove 10313 also with no restrictions, can by designer according to
Specific requirements are designed.
In an application scenarios, for the ease of replacing end shield connector 1030, with continued reference to Fig. 9 and Figure 10, the extraction of end shield
Line 1035 is wrapped on the second bolt 1037, and correspondingly, the first end 10311 of earthing rod 1031 is equipped with and the second bolt 1037
Corresponding the second groove 10314 matched, wherein the second bolt 1037 is detachably assemblied in the second groove 10314.Specifically,
One end of the lead-out wire 1035 of end shield is welded in end shield, and the other end is wrapped on the second bolt 1037, thus by the second bolt
1037 are assemblied in the second groove 10314 between the lead-out wire 1035 of realization end shield and the first end 10311 of earthing rod 1031
Connection.In the application scenarios, by the way that the lead-out wire 1035 of end shield is wrapped on the second bolt 1037, when because aging,
When the reasons such as accident need to replace end shield connector 1030, the second bolt 1037 and earthing rod 1031, behaviour can be directly separated
Facilitate.
In an application scenarios, refering to Fig. 9 and Figure 11, the cross sectional shape of mounting hole 10111 in its axial direction be it is ladder-like,
So that mounting hole 10111 forms a loading end 10112 in its axial direction.When compressing member 1033 is assemblied on flange 1011,
Insulating part 1032 is at least partly clamped between annular slab 10331 and loading end 10112, and then realizes 1032 He of insulating part
Earthing rod 1031 is located in mounting hole 10111.That is, pass through the clamping of compressing member 1033 and loading end 10112, ground connection
Column 1031 and insulating part 1032 can not be further along the axial movements of mounting hole 10111.In addition to making earthing rod 1031 and insulation
Part 1032 can not also be compacted part 1033 along the radial motion of mounting hole 10111, insulating part 1032 and loading end 10112 clamps
Partial surrounding is bonded with the hole wall of mounting hole 10111, to guarantee earthing rod 1031 and insulating part 1032 in mounting hole 10111
It is interior to move, that is, it is located in mounting hole 10111.
In an application scenarios, refering to Fig. 9 and Figure 10, when in order to guarantee that earthing rod 1031 is housed in grounding base 1034 with
Electrical connection between grounding base 1034, the second end 10312 of earthing rod 1031 are equipped with multiple elastic sheet metals 1038, elasticity gold
The extending direction for belonging to piece 1038 is identical as the axial direction of earthing rod 1031.
The both ends of elastic sheet metal 1038 are fixed on earthing rod 1031, when not by external force, elastic sheet metal 1038
Middle part 10381 to far from earthing rod 1031 direction expand, when the second end 1102 of earthing rod 1031 is housed in grounding base
When in 1034, grounding base 1034 applies active force to elastic sheet metal 1038, to enable multiple 1038 bullets of elastic sheet metal
Property be supported between earthing rod 1031 and grounding base 1034, and then guarantee being electrically connected between earthing rod 1031 and grounding base 1034
It connects.Wherein, multiple elastic sheet metals 1038 are evenly spaced on along the circumferential direction of earthing rod 1031, and in order to connect in multiple plug
After ground seat 1034, multiple elastic sheet metals 1038 are still able to maintain good elasticity, and elastic sheet metal 1038 is using machines such as copper
Tool material of good performance is made.
Refering to fig. 1 to Fig. 9, in another embodiment of the application, oil conservater 1050 is by way of mucilage binding and insulation tube
1010, current-carrying bar 1021 is fixedly connected, and round nut 1090 is connect by way of mucilage binding with insulation tube 1010, and flange 1011 passes through
The mode of mucilage binding is connect with the first insulation tube 1012, the second insulation tube 1013 respectively.Specifically, oil conservater 1050 and insulation tube
Contact surface, the method for 1010 contact surface, the contact surface of oil conservater 1050 and current-carrying bar 1021, round nut 1090 and insulation tube 1010
The contact surface and flange 1011 of orchid 1011 and the first insulation tube 1012 and the contact surface of the second insulation tube 1013 are equipped with mucilage binding
Slot 1300, mucilage binding slot 1300 is interior to be filled with encapsulated material for fixing, such as resin glue etc..
Further for 1000 sealing performance of bushing shell for transformer is improved, in an application scenarios, bushing shell for transformer 1000 is also
Including multiple sealing rings 1400.Specifically, contact surface, oil conservater 1050 and the insulation tube of second end cover 1060 and current-carrying bar 1021
1010 contact surface, the contact surface of insulation tube 1010 and round nut 1090, the contact surface of current-carrying bar 1021 and round nut 1090, the
One end cap 1070 and the contact surface of round nut 1090, the contact surface of first end cover 1070 and current-carrying bar 1021, grounding base 1034 with
The contact of the contact surface, compressing member 1033 and the contact surface of insulating part 1032, compressing member 1033 and flange 1011 of compressing member 1033
The contact surface in face, insulating part 1032 and loading end 10112 is equipped with sealing ring 1400.By the setting of multiple sealing rings 1400,
Both the transformer oil being avoided that in insulation tube 1010 leaks out to outside by the contact surface of each element, and oil leakage phenomenon occurs,
It can prevent external humidification, pollutant etc. from invading.And between seal ring part 1400, such as insulation tube 1010 and round nut 1090
Sealing ring 1400 between sealing ring 1400, insulation tube 1010 and oil conservater 1050 is also avoided that transformer oil and mucilage binding slot 1300
In encapsulated material contact, to avoid oil from generating pollution and influence the electric property of bushing shell for transformer 1000.Wherein, it seals
Circle 1400 can be the shapes such as circle, rectangle along axial cross section, herein with no restrictions.
Consolidate to sum up, current-carrying bar in capacitor core is extended one end outside insulation tube by the application with the first connecting terminal
It is fixed to connect and be electrically connected with the first connecting terminal, so that the electric current in transformer can flow to the first terminals by current-carrying bar
Electric current in son or the first connecting terminal can flow to transformer by current-carrying bar, that is to say, that the application directly utilizes electricity
The current-carrying bar held in fuse carries out current-carrying, and bushing shell for transformer generally all includes the wrap-around tube in capacitor core compared to the prior art
And wear current-carrying bar in wrap-around tube, structure is simple, cost can be saved, and no longer need to carry out wrap-around tube and current-carrying bar it
Between insulation production, can reduce production process, improve production efficiency.And the bushing shell for transformer in the application further includes and capacitor
The end shield connector that end shield is electrically connected in fuse, can either guarantee the normal operation of bushing shell for transformer, can be used for transformer set
Pipe carries out high-potting.
Also gasket is arranged between current-carrying bar and round nut in the bushing shell for transformer in the application simultaneously, which is ring junction
Structure, inner ring surface and outer ring surface be it is non-circular, can be avoided current-carrying bar and rotated in bushing shell for transformer.
In addition the Transformer Bushing Tap connector in the application specifically includes earthing rod, insulating part, compressing member and ground connection
Seat can carry out capacitance, dielectric loss measurement to bushing shell for transformer when carrying out high-potting, and normally transport in bushing shell for transformer
End shield is grounded when row, guarantees that the field strength distribution of capacitor core is uniform.Simultaneously compared with prior art, the application no setting is required small porcelain
Part, structure is simple, compact, and in assembly, it is only necessary to successively assemble earthing rod, insulating part, compressing member, and then compressing member is led to
It crosses the first bolt to be fixed on flange, then grounding base is located on compressing member, it is convenient, fast.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of bushing shell for transformer characterized by comprising
Insulation tube, axially disposed is hollow structure；
Capacitor core, including wearing the current-carrying bar of the insulation tube and being located inside the insulation tube and outside the current-carrying bar
The multilayer dielectric layer and multi-layer capacity screen that side is successively wound, wherein the current-carrying bar extends one end except the insulation tube
It is fixedly connected with the first connecting terminal and is electrically connected with first connecting terminal；
End shield connector is electrically connected with the end shield in the capacitor core, is used for the end in bushing shell for transformer operation
Screen ground connection.
2. bushing shell for transformer according to claim 1, which is characterized in that further include:
Oil conservater is fixed on one end of the insulation tube and is connected to the insulation tube, wherein described one end of the current-carrying bar
The oil conservater is passed through from the insulation tube, is fixedly connected with first connecting terminal being located at outside the oil conservater.
3. bushing shell for transformer according to claim 2, which is characterized in that
The current-carrying bar is set as hollow structure along the axial direction, and the current-carrying bar is located at the insulation tube and/or the oil storage
Several through-holes are equipped with inside cabinet and not by the side wall that the insulating layer and the capacitance plate cover.
4. bushing shell for transformer according to claim 2, which is characterized in that further include:
First end cover covers the current-carrying bar and extends the other end except the insulation tube, and the first end cover is far from described
The side of current-carrying bar is fixed with the second connecting terminal, and the first end cover is electrically connected the current-carrying bar and second terminals
Son.
5. bushing shell for transformer according to claim 4, which is characterized in that further include:
Round nut is closely sheathed on the current-carrying bar periphery and covers the other end of the insulation tube, while the first end cover
Abut end face of the round nut far from the insulation tube side；
Gasket, the gasket are ring structure, and the inner ring surface and outer ring surface of the gasket are non-disc, wherein the gasket
Be fastened between the current-carrying bar and the round nut, the matching of the current-carrying bar and the inner ring surface be bonded, the round nut and
The outer ring surface matching fitting.
6. bushing shell for transformer according to claim 5, which is characterized in that the inner ring surface and outer ring surface of the gasket are non-
Disc specifically includes:
The outer ring surface is equipped with several first card slots, and the inner wall at gasket described in the round nut face is equipped with and described first
Corresponding the first fixture block matched of card slot；And/or
The inner ring surface is equipped with several second fixture blocks, and the outer wall at gasket described in the current-carrying bar face is provided with and described second
Corresponding the second card slot matched of fixture block.
7. bushing shell for transformer according to claim 5, which is characterized in that
The insulation tube includes the first insulating sublayer pipe and the second insulating sublayer pipe by flanged joint, and the first insulating sublayer pipe is not
The oil conservater, one end connection of flanged joint described in the second insulating sublayer Guan Buyu are connect with one end of the flanged joint
The round nut.
8. bushing shell for transformer according to claim 7, which is characterized in that the end shield connector includes:
Earthing rod, the earthing rod are conduct piece, including the first end that is connect with the lead-out wire of the end shield and with it is described
The opposite the second end of first end, wherein when in the mounting hole that the earthing rod is plugged on the flange, the ground connection
The second end of column is far from the mounting hole；
Insulating part is set in the periphery of the earthing rod, for the hole wall of the mounting hole and the outer wall of the earthing rod to be isolated；
Compressing member, including be set in the insulating part periphery annular slab and from the annular slab inner circumferential extend peripheral wall,
In, when the compressing member makes the ground connection by passing through the first bolt on the annular slab and being assemblied on the flange base
When column and the insulating part are positioned in the mounting hole, the compressing member is electrically connected with the flange, and the compressing member
The peripheral wall far from the flange；
Grounding base is provide with the compressing member and the second end of the earthing rod is housed in the grounding base, into
And it is electrically connected the compressing member and the earthing rod.
9. bushing shell for transformer according to claim 8, which is characterized in that
The insulating part is set in the periphery of the earthing rod by pouring technology, and the earthing rod connects with the insulating part
The outer wall of touching is equipped with several first grooves.
10. bushing shell for transformer according to claim 8, which is characterized in that
The lead-out wire of the end shield is wrapped on the second bolt, and the first end of the earthing rod is equipped with and second spiral shell
Corresponding the second groove matched of bolt, so that second bolt is detachably assemblied in second groove, and then realizes institute
State the connection between the lead-out wire of end shield and the first end of the earthing rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920435797.6U CN209544113U (en) | 2019-04-01 | 2019-04-01 | Bushing shell for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920435797.6U CN209544113U (en) | 2019-04-01 | 2019-04-01 | Bushing shell for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209544113U true CN209544113U (en) | 2019-10-25 |
Family
ID=68275829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920435797.6U Active CN209544113U (en) | 2019-04-01 | 2019-04-01 | Bushing shell for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209544113U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341543A (en) * | 2020-03-05 | 2020-06-26 | 江苏神马电力股份有限公司 | Terminal assembly and transformer bushing |
| WO2020199943A1 (en) * | 2019-04-01 | 2020-10-08 | 江苏神马电力股份有限公司 | Transformer bushing |
| CN112344986A (en) * | 2020-09-29 | 2021-02-09 | 中国电力科学研究院有限公司 | Temperature and pressure integrated real-time sensing device for oil-immersed paper insulating sleeve |
-
2019
- 2019-04-01 CN CN201920435797.6U patent/CN209544113U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020199943A1 (en) * | 2019-04-01 | 2020-10-08 | 江苏神马电力股份有限公司 | Transformer bushing |
| CN111341543A (en) * | 2020-03-05 | 2020-06-26 | 江苏神马电力股份有限公司 | Terminal assembly and transformer bushing |
| CN112344986A (en) * | 2020-09-29 | 2021-02-09 | 中国电力科学研究院有限公司 | Temperature and pressure integrated real-time sensing device for oil-immersed paper insulating sleeve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209544113U (en) | Bushing shell for transformer | |
| CN102595754B (en) | Radiation device installing box and oil cooling cyclic system as well as X-ray generator | |
| CN102595753B (en) | Radiation device installing box and X-ray generator | |
| CN103683145B (en) | A kind of terminal box | |
| WO2020199943A1 (en) | Transformer bushing | |
| EP3172800B1 (en) | Dry power cable termination | |
| CN105469934A (en) | Tap grounding apparatus and transformer bushing with same | |
| CN110783721A (en) | +/-160 kV low-temperature superconducting sleeve | |
| KR20100100627A (en) | Current connection apparatus for tanks | |
| CN109817432A (en) | End shield connector and bushing shell for transformer | |
| CN106469594B (en) | Bushing shell for transformer | |
| CN203983934U (en) | Dry-type power cable termination | |
| CN209544114U (en) | End shield connector and bushing shell for transformer | |
| CN109786082A (en) | Bushing shell for transformer | |
| RU177141U1 (en) | Device for the tight entry of conductive elements | |
| CN209544112U (en) | Bushing shell for transformer | |
| CN104599822B (en) | Anti-leakage box-type substation conducting rod and manufacturing method thereof | |
| CN209249262U (en) | A kind of transformer bushing | |
| CN102376506A (en) | Full-insulated fuse for buried combined transformer | |
| CN201877271U (en) | Lead outlet device | |
| CN206022653U (en) | A kind of end shield earthing or grounding means of sleeve pipe Leakage Current signal extraction | |
| CN201130591Y (en) | Oil paper condenser type low-voltage great current transformer tube | |
| CN210575293U (en) | Capacitive bushing | |
| CN205790947U (en) | A kind of PT cabinet sleeve pipe and busbar coupler | |
| CN205159100U (en) | Capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |