CN206758203U - The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points - Google Patents
The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points Download PDFInfo
- Publication number
- CN206758203U CN206758203U CN201720549577.7U CN201720549577U CN206758203U CN 206758203 U CN206758203 U CN 206758203U CN 201720549577 U CN201720549577 U CN 201720549577U CN 206758203 U CN206758203 U CN 206758203U
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- core body
- voltage
- electric capacity
- conductor
- 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
It the utility model is related to a kind of end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points, including conductor, epoxy electric capacity core body, also there is shielding construction, high voltage connections are set in cannula end, the screen layer of epoxy electric capacity core body is connected with the high-pressure section of sleeve pipe by the high voltage connections, the two is turned into equipotential；High voltage connections include fixing bolt and wire, and the space for placing fixing bolt is opened up in conductor afterbody, the space of connecting wire is opened up in epoxy electric capacity core body afterbody.The utility model reduces installation dimension in sleeve pipe oil, facilitate the transport, installation and the design of transformer of product, the screen layer of electric capacity core body is connected with the high-pressure section of sleeve pipe, the two is set to turn into equipotential, the poor insulation between first layer electrode and conductor has been masked, has improved the electric property of sleeve pipe.
Description
Technical field
A kind of bushing shell for transformer manufacturing technology is the utility model is related to, specifically a kind of dry type low-voltage, high-current sleeve pipe
The end construction of power transformer enclosure inside points.
Background technology
Low-voltage, high-current sleeve pipe is used for low-pressure side or the enclosed busbar end of power plant step-up transformer, can be by transformation
The electric component outside wires guides to oil tank of transformer inside device, it serves not only as lead insulation against ground, and bears
The effect of anchor leg.Such molded cannula needs to bear very big electric current in the process of running, considers cylindrical conductor current-carrying
Kelvin effect, the diameter dimension of its conductor are larger.Traditional low-voltage, high-current sleeve pipe needs to fill between conductor and external insulation
Transformer oil, to ensure the reliability of insulation, needs to leave larger space as supplementary insulation between conductor and external insulation.On
State that the diameter that two kinds of factors cause low-voltage, high-current sleeve pipe is excessive, have impact on the exterior part arrangement of transformer, improve manufacture
Cost.
Compared to the filling type low-voltage, high-current sleeve pipe of application time at most, dry type low-voltage, high-current sleeve pipe is the big electricity of low pressure
Flow the technology more smaller sleeve pipe of novelty, more reliable performance, installation space-consuming in sleeve pipe.Due to the species sleeve pipe conductor with
It is additionally arranged epoxy electric capacity core body between external insulation, equal laminated structure is formed by coaxial cylindrical series capacitor inside core body, makes height
Evenly, insulating properties are more reliable for electric field branch between pressure and ground.
Dry type low-voltage, high-current sleeve pipe is as low-voltage, high-current sleeve pipe field more novel product, in hydroelectric project
Widely apply.
At present, the primary structure of such molded cannula is：
1st, electrical conductor portion.It is welded by more piece copper or aluminium conductor, is added at the initial and end both ends of sleeve pipe according to requirement of engineering
Work goes out the shape of line bank, for being fixedly connected with transformer lead and power network connection end, plays a part of current-carrying；
2nd, epoxy electric capacity core body.It is process by the solidification of epoxy resin varnish(ed) paper, core body laid inside has electrode aluminium
Paper tinsel, coaxial cylindrical series capacitor is formed, form the capacitance type structure of core body；
3rd, upper porcelain piece.Usually electrotechnical ceramics, high tension insulator material, intensity is high, and mechanicalness is good；
4th, compressing structure is sealed.Generally it is made up of, passes through butterfly spring pressing plate, strength butterfly spring group, fastening bolt etc.
Compression butterfly spring group provides the thrust integrally assembled for sleeve pipe, and compression seal packing ring makes sleeve pipe turn into closed entirety；
5th, filler is aided in.It is exhausted as auxiliary that megohmite insulant is filled in cavity between epoxy electric capacity core body and porcelain piece
Edge.
There is the problem of varied in engineer applied in traditional low-voltage, high-current sleeve pipe.Should from engineering in recent years
From the point of view of situation, poor sealing occurred, internal shelf depreciation causes transformer oil the flammable explosive gas such as acetylene, temperature occur
Situations such as cannula end porcelain piece stress causes porcelain piece breakage in the case that degree change is big.Traditional low-voltage, high-current sleeve pipe exist with
The place of optimization design what time is needed down：
1st, conventional low high current sleeve pipe uses monomer porcelain insulating structure, i.e., upper porcelain piece and lower ceramic part are an overall porcelain
Part, flange are cement gel assembling structure.Cement mucilage binding between this structure flanges and porcelain piece can not meet sealing cause flange with
It is nervous to raise seat sealing surface position dimension, gap is too small between rise seat perforate and sleeve pipe, causes the increase of sleeve pipe installation difficulty,
Installation sleeve pipe easily occurs, and porcelain piece is collided with broken accident at present；
2nd, the oil clearance between lower ceramic part and lower ceramic part and conductor is needed to meet to insulate, and causes bushing lifting seat inside points straight
Footpath is larger, the waste of cost caused by causing power transformer enclosure and transformer size increase；
3rd, the difficulty increase in sleeve pipe transportation, porcelain belong to fragile article, porcelain piece can caused to crush by external force effect
Accident；
4th, lower ceramic part crushes when sleeve pipe is run, and caused porcelain fragment and powder can pollute to transformer, causes serious
Damage sequence.
Sleeve pipe is divided into air side portion and power transformer enclosure inside points according to the actual conditions used on the transformer, is
Ensure the safe for operation of sleeve pipe, avoid the generation of above mentioned problem, it is necessary to improve dry type low-voltage, high-current cannula end and (rise
Dais inside points) structure, with meet power system security can requirement.
Utility model content
For prior art middle sleeve safety in operation difference the deficiencies of, problem to be solved in the utility model is to provide one
Kind meets the end construction for the dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points that power system security can require.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points of the utility model, including lead
Body, epoxy electric capacity core body, also with shielding construction, i.e., set high voltage connections in cannula end, by the high voltage connections by ring
The screen layer of oxygen electric capacity core body is connected with the high-pressure section of sleeve pipe, the two is turned into equipotential.
The oil-through hole gap being connected with transformer oil is set in sleeve pipe tail wiring terminal extended position.
High voltage connections include fixing bolt and wire, the space for placing fixing bolt are opened up in conductor afterbody, in epoxy
Electric capacity core body afterbody opens up the space of connecting wire.
Also there is sealing compressing structure, including closing panel, butterfly spring group, butterfly spring pressing plate and fastening bolt,
Epoxy electric capacity core body tail end is fastened in the end face seal of closing panel side；Closing panel is provided with through hole, butterfly spring group and
Butterfly spring pressing plate is arranged on the screwed hole of conductor by fastening bolt by closing panel through hole.
The utility model has the advantages that and advantage：
1. the utility model instead of the bottom porcelain piece of conventional low high current sleeve pipe with epoxy resins insulation, sleeve pipe is reduced
Installation dimension in oil, facilitate the transport, installation and the design of transformer of product；
2. the utility model sleeve pipe afterbody sets high pressure to connect, by the high-voltage section split-phase of the screen layer of electric capacity core body and sleeve pipe
Connection, makes the two turn into equipotential, and epoxy electric capacity core body, conductor and high voltage connections constitute shielding construction, has masked the
One layer of poor insulation between electrode and conductor, improve the electric property of sleeve pipe；
3. setting oil-through hole gap in tail wiring terminal extended position in the utility model, it is connected with transformer oil, has
Standby good heat dispersion；
4. the parts such as closing panel of the present utility model, butterfly spring group, butterfly spring pressing plate, fastening bolt constitute pressure
Locking structure, seal pressure can be provided for sleeve pipe, sleeve pipe is formed the entirety of a sealing, the mechanical performance of sleeve pipe more may be used
Lean on.
5. the utility model replaces helical spring using butterfly spring, the tail end length of sleeve pipe is reduced, is also equipped with simultaneously
The function of being expanded with heat and contract with cold between balancing sleeve conductor and epoxy electric capacity core body, mechanical performance is more stable, and structure is simpler, and operation is more
It is convenient.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Wherein, 1 is epoxy electric capacity core body；2 be sealing gasket；3 be closing panel；4 be butterfly spring group；5 be butterfly spring
Pressing plate；6 be conductor；7 be high voltage connections；8 be fastening bolt.
Embodiment
The utility model is further elaborated with reference to Figure of description.
A kind of as shown in figure 1, end knot of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points of the utility model
Structure, there is conductor 6, epoxy electric capacity core body 1, be that it sets high voltage connections in cannula end also with shielding construction, shielding construction
7, the screen layer of epoxy electric capacity core body 1 is connected with the high-pressure section of sleeve pipe by the high voltage connections 7, turn into the two etc.
Current potential.
In the present embodiment, high voltage connections include hold-down bolt and wire (but being not limited to this kind of attachment structure), in conductor
Afterbody opens up the space for placing hold-down bolt, and the space of connecting wire is opened up in epoxy electric capacity core body afterbody, it is ensured that high pressure connects
Part, which includes hold-down bolt and the bond pad locations of wire, to be influenceed by external force.Sleeve pipe is set in tail wiring terminal extended position
Oil-through hole gap, is connected with transformer oil.
The utility model also has sealing compressing structure, including closing panel 3, butterfly spring group 4, butterfly spring pressing plate 5
And fastening bolt 8, groove is set on the side end face of closing panel 3 one, is provided with sealing gasket 2 in groove, closing panel is sealed
Pad 2 is fastened on the tail end of epoxy electric capacity core body 1；Closing panel 3 is provided with through hole, and butterfly spring group 4 and butterfly spring pressing plate 5 are by tight
Fixing bolt 8 is arranged on the screwed hole of conductor 6 by the through hole of closing panel 3.
Epoxy electric capacity core body 1 and conductor 6 are connected fastening, then by the utility model in assembling by high voltage connections 7
Sealing gasket 2 is adhered in the groove of closing panel 3, then closing panel 3 is fastened on epoxy electric capacity core body 1.Then will be pre-
Fastening bolt 8, butterfly spring pressing plate 5 and the butterfly spring group 4 first packaged is arranged on conductor 6 by the through hole of closing panel 3
On screwed hole, butterfly spring group 4 is compressed to design height by screwing in fastening bolt 8, you can complete assembly work.
Claims (4)
1. a kind of end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points, there is conductor, epoxy capacitance core
Body, it is characterised in that：Also there is shielding construction, i.e., set high voltage connections in cannula end, by the high voltage connections by epoxy
The screen layer of electric capacity core body is connected with the high-pressure section of sleeve pipe, the two is turned into equipotential.
2. the end construction of the dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points as described in claim 1, its feature
It is：The oil-through hole gap being connected with transformer oil is set in sleeve pipe tail wiring terminal extended position.
3. the end construction of the dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points as described in claim 1, its feature
It is：High voltage connections include fixing bolt and wire, the space for placing fixing bolt are opened up in conductor afterbody, in epoxy electric capacity
Core body afterbody opens up the space of connecting wire.
4. the end construction of the dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points as described in claim 1, its feature
It is：Also there is sealing compressing structure, including closing panel, butterfly spring group, butterfly spring pressing plate and fastening bolt, holding
Portion's cover plate side end face seal is fastened on epoxy electric capacity core body tail end；Closing panel is provided with through hole, butterfly spring group and butterfly
Spring bearer plate is arranged on the screwed hole of conductor by fastening bolt by closing panel through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720549577.7U CN206758203U (en) | 2017-05-17 | 2017-05-17 | The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720549577.7U CN206758203U (en) | 2017-05-17 | 2017-05-17 | The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206758203U true CN206758203U (en) | 2017-12-15 |
Family
ID=60619007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720549577.7U Active CN206758203U (en) | 2017-05-17 | 2017-05-17 | The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206758203U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257524A (en) * | 2021-05-10 | 2021-08-13 | 山东电力设备有限公司 | Gas collection prevention device and method for extra-high voltage reactor lifting seat |
-
2017
- 2017-05-17 CN CN201720549577.7U patent/CN206758203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257524A (en) * | 2021-05-10 | 2021-08-13 | 山东电力设备有限公司 | Gas collection prevention device and method for extra-high voltage reactor lifting seat |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203250630U (en) | Capacitor voltage transformer electromagnetism unit intermediate transformer | |
| CN204178930U (en) | Power-off explosion-proof type capacitor | |
| CN206639699U (en) | A kind of 110kV Assembled high-voltage shunted capacitors device | |
| CN206758203U (en) | The end construction of dry type low-voltage, high-current sleeve pipe power transformer enclosure inside points | |
| CN208796801U (en) | A kind of insulation filling type capacitance type transformer sleeve | |
| CN105067976A (en) | Cable GIS terminal integral prefabricated AC withstand voltage testing device | |
| CN205193117U (en) | Capacitance grading formula compact impulse generator | |
| CN106451084A (en) | Transformer station combined protective electrical appliance | |
| CN203521081U (en) | Inner cone plug-in lightning arrester | |
| CN201298409Y (en) | Polyether-ether-ketone insulation bushing | |
| CN209249262U (en) | A kind of transformer bushing | |
| CN204204614U (en) | A kind of small outdoor voltage transformer | |
| CN107275087B (en) | A kind of super high power three-level converter direct current capacitors | |
| CN201138603Y (en) | Novel oil-immersed type transformer with amorphous alloy iron core | |
| CN206532686U (en) | Oil-filled transformer is with hermetically sealed combined type 1kV grades of sleeve pipes | |
| CN104966613A (en) | Microwave oven capacitor | |
| CN202473586U (en) | Insulation structure of current transformer for electric locomotive | |
| CN106783093A (en) | A kind of oil-filled transformer is with hermetically sealed combined type 1kV grades of sleeve pipe | |
| CN208673858U (en) | A kind of oil tank of transformer that can delay transformer oil ageing | |
| CN209328704U (en) | A kind of compound mutual inductor being exclusively used in high pressure self healing capacitor | |
| CN206726954U (en) | A kind of long-service-life capacitor | |
| CN101577172B (en) | Stress cone type dry sleeve of transformer | |
| CN201233801Y (en) | Dry sheath for stress cone type transformer | |
| CN206947179U (en) | A kind of super high power three-level converter direct current capacitors | |
| CN201773808U (en) | Oil immersed fuse |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |