CN217562365U - Expander for oil-immersed current transformer and oil-immersed current transformer - Google Patents
Expander for oil-immersed current transformer and oil-immersed current transformer Download PDFInfo
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- CN217562365U CN217562365U CN202221561891.4U CN202221561891U CN217562365U CN 217562365 U CN217562365 U CN 217562365U CN 202221561891 U CN202221561891 U CN 202221561891U CN 217562365 U CN217562365 U CN 217562365U
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- expander
- oil
- current transformer
- explosion
- expansion joint
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- 238000007789 sealing Methods 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 description 8
- 238000005422 blasting Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model provides an expander and oil-immersed current transformer for oil-immersed current transformer relates to the expander field for oil-immersed current transformer, and the scheme of adoption is: including the expansion joint, expansion joint upper portion intercommunication has the upper flange, the internal diameter of upper flange is D1, the expansion joint internal diameter is D2, D1= D2, be provided with the oiling on the upper flange terminal surface and connect, the oiling connect with the expansion joint intercommunication, be provided with seal assembly on the upper flange terminal surface, expansion joint lower part intercommunication has the lower flange, the lower flange includes connecting pipe and installation skirt, the installation skirt sets up the one end of connecting pipe, the internal diameter of connecting pipe is D3, D3= D2, the installation skirt is provided with a plurality of mutual-inductor connecting holes. The utility model discloses the circulation of the inside fluid of expander of being convenient for, when the inside trouble that breaks down of product, the expander can the snap action, and in time the pressure release plays the explosion-proof effect.
Description
Technical Field
The utility model relates to an expander field for oil-immersed current transformer especially relates to an expander and oil-immersed current transformer for oil-immersed current transformer.
Background
In order to avoid the contact between insulating oil inside the transformer and outside air and keep the oil from being affected with damp and oxidized, the oil immersed transformer is of a fully closed structure, wherein the high-voltage transformer is sealed by adopting an expander, so that the internal pressure of the transformer can be kept basically unchanged within a specified measurement change range, and the occurrence of transformer accidents is reduced; in the related art, as shown in fig. 1 and fig. 2, the inside of an expander is mostly of a stacked metal corrugated structure, the upper surface and the lower surface of the expander are connected with a product through welding flanges, the upper flange surface of the expander is limited by the requirements of oil injection and oil ejection of the product, a certain space is reserved for installation and connection with oil injection equipment, but the upper flange surface has a sealing requirement, so that the size of an opening of the upper flange surface of the expander is limited, only the opening is small, the lower flange surface of the expander is limited by the installation structure at the present stage, and only the opening is small.
Therefore, in view of the current situation of the prior art, it is an urgent need to solve the problem of developing an expander for an oil-immersed current transformer and an oil-immersed current transformer.
SUMMERY OF THE UTILITY MODEL
In order to overcome not enough among the above-mentioned prior art, the utility model provides an expander and oil-immersed current transformer for oil-immersed current transformer, the circulation of the inside fluid of the expander of being convenient for, when the inside trouble of product, the expander can quick action, and in time the pressure release plays explosion-proof.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the utility model provides an expander and oily formula current transformer for oily formula current transformer, includes the expansion joint, expansion joint upper portion intercommunication has the upper flange, the internal diameter of upper flange is D1, the expansion joint internal diameter is D2, D1= D2, be provided with the oiling joint on the upper flange terminal surface, the oiling joint with the expansion joint intercommunication, be provided with seal assembly on the upper flange terminal surface, expansion joint lower part intercommunication has lower flange, lower flange includes connecting pipe and installation skirt, the installation skirt sets up the one end of connecting pipe, the internal diameter of connecting pipe is D3, D3= D2, the installation skirt is provided with a plurality of mutual-inductor connecting holes. Through the opening diameter increase with flange about the expansion joint can make things convenient for the fluid circulation of expansion joint die cavity, the pressure of being convenient for transmits fast, prevents to suppress and presses the damage, through setting up oiling joint and seal assembly, guarantees still to have good leakproofness and oiling convenience behind the expansion opening.
Furthermore, seal assembly includes sealing washer and explosion-proof piece, the sealing washer with from up detachably installs in proper order down on the upper flange of explosion-proof piece, the sealing washer with the explosion-proof piece all is provided with the oiling and connects the mounting groove, be provided with two at least pressure release recesses on the explosion-proof piece. Pressure release recess is broken through than other parts of explosion-proof piece more easily, can realize carrying out the pressure release through the pressure release recess when die cavity internal pressure is too big, further the explosion-proof ability of inflation ware.
Furthermore, a plurality of the pressure relief grooves are intersected at the center of the explosion-proof sheet. The central point of the explosion-proof sheet can become a fixed explosion bursting point, the explosion degree is increased, and the pressure is rapidly released.
Furthermore, the explosion-proof piece adopts the aluminum alloy material. Sealing and rapid pressure relief can be achieved.
Furthermore, the lower end of the connecting pipe is provided with an installation skirt, the end face of the installation skirt is provided with a plurality of mutual inductor connecting holes, and the circumferential surface of the installation skirt is provided with a shell installation hole. Can avoid unsettling for the expander bottom provides the support, avoid causing the oil leakage condition because of vibrations in the transportation.
Furthermore, the oil injection joint is communicated with a one-way valve, and the one-way valve is communicated with the expansion joint cavity. Can realize sealed and the oiling switches on, guarantees sealed and convenient to use.
The utility model also provides an oil-immersed current transformer, including foretell expander for oil-immersed current transformer, still include the current transformer casing, current transformer casing top is provided with the expander mounting disc, the installation skirt with the connection can be dismantled to the expander mounting disc. Can provide support for the expander and avoid being suspended.
According to the technical scheme, the utility model has the advantages of it is following:
the scheme provides an expander for an oil-immersed current transformer and the oil-immersed current transformer, pressure is convenient to transmit quickly by expanding the opening diameters of an upper flange and a lower flange, the expander is prevented from being damaged by suppressed pressure, and through an oil injection joint and a one-way valve, the sealing performance is ensured and oil injection is convenient; the sealing assembly can ensure sealing and enhance the explosion-proof capacity of the expander; the mounting of the skirt increases the support area for the expander to prevent leakage due to vibration.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an assembly structure of an expander and a current transformer shell in the prior art.
Fig. 2 is a schematic view of an assembly structure of an expansion joint and an upper flange in the prior art.
Fig. 3 is a schematic view of an assembly structure of the expansion joint, the upper flange and the lower flange according to the embodiment of the present invention.
Fig. 4 is a schematic structural view of an explosion-proof sheet according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an oil-immersed current transformer according to an embodiment of the present invention.
In the figure, 1, a conventional expander, 2, a conventional upper flange opening, 3, an expander shell, 4, an upper flange, 5, an oil injection joint, 6, an expansion joint, 7, an installation skirt, 8, a connecting pipe, 9, a transformer connecting hole, 10, a pressure relief groove, 11, an expander installation disc, 12 and a current transformer shell.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is obvious that the embodiments described below are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments in this patent without making creative efforts, shall fall within the protection scope of this patent.
As shown in fig. 3, the present embodiment provides an expander for an oil-immersed current transformer, including an expansion joint 6, an upper flange 4, a lower flange, an oil injection joint 5 and a sealing assembly; the upper part of the expansion joint 6 is communicated with an upper flange 4, the inner diameter of the upper flange 4 is D1, the inner diameter of the expansion joint 6 is D2, D1= D2, an oil filling joint 5 is arranged on the end face of the upper flange 4, the axis of the oil filling joint 5 is perpendicular to the axis of the upper flange 4, the oil filling joint 5 is communicated with the expansion joint 6, the oil filling joint 5 is communicated with a one-way valve, the one-way valve is communicated with a cavity of the expansion joint 6, a sealing assembly is arranged on the end face of the upper flange 4, the sealing assembly comprises a sealing ring and an explosion-proof sheet, the sealing ring and the explosion-proof sheet are detachably mounted on the upper flange 4 through bolts in sequence from bottom to top, and the sealing ring and the explosion-proof sheet are both provided with oil filling joint mounting grooves; the lower part of the expansion joint 6 is communicated with a lower flange, the lower flange comprises a connecting pipe 8 and an installation skirt 7, the inner diameter of the connecting pipe 8 is D3, D3= D2, the lower end of the connecting pipe 8 is provided with the installation skirt 7, the end face of the installation skirt 7 is provided with a plurality of mutual inductor connecting holes 9, and the circumferential surface of the installation skirt is provided with a shell installation hole; this expander still includes expander housing 3, and expander housing 3 plays the effect of protection inner structure, and expander housing 3 passes through the bolt to be connected with the casing mounting hole of installation skirt 7, still is provided with the oil level observation window on the expander housing 3.
As shown in fig. 4, the explosion-proof sheet may adopt the following specific structure: the anti-explosion piece is provided with a plurality of pressure relief grooves 10, the pressure relief grooves 10 are intersected at the center of the anti-explosion piece, in the specific embodiment, 4 pressure relief grooves 10 are arranged, the anti-explosion piece is made of an aluminum alloy material, mounting holes are uniformly formed in the edge of the anti-explosion piece, and the anti-explosion piece is mounted on the upper flange 4 through bolts; the pressure relief groove 10 is thinner and easier to be exploded compared with other positions, the explosion-proof piece can be rapidly exploded to relieve pressure under the rated pressure exceeding 0.06-0.1MPa, and the explosion-proof piece is converged at the center to increase the explosion degree and further improve the explosion-proof capacity of the expander, so that the sealing performance is ensured and the explosion-proof effect of the expander is improved through the explosion-proof piece.
As shown in fig. 5, this embodiment further provides an oil-immersed current transformer, which includes the above-mentioned expander for the oil-immersed current transformer, and further includes a current transformer housing 12, an expander mounting disc 11 is provided above the current transformer housing 12, and the mounting skirt 7 is detachably connected to the expander mounting disc 11.
It can be seen from the above detailed description that the present invention has the following beneficial effects:
1. the opening diameters of the upper flange and the lower flange are enlarged, so that the pressure can be conveniently and quickly transmitted, the damage of the expander caused by suppressed pressure is prevented, and the sealing performance and the oil injection are ensured and the oil injection is facilitated through the oil injection joint 5 and the one-way valve;
2. the sealing assembly can ensure sealing and enhance the explosion-proof capacity of the expander;
3. the mounting skirt 7 increases the supporting area for the expander to prevent leakage due to vibration;
4. through being provided with on the explosion-proof piece and crossing in a plurality of pressure release recesses 10 of a bit, can realize the fixed point blasting, increase explosion-proof piece blasting degree reaches the effect of rapid pressure release.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings (if any) are used to distinguish relative relationships in position, and are not necessarily qualitative. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides an expander for oil-immersed current transformer, its characterized in that, includes expansion joint (6), expansion joint (6) upper portion intercommunication has last flange (4), the internal diameter of going up flange (4) is D1, expansion joint (6) internal diameter is D2, D1= D2, be provided with oiling joint (5) on going up flange (4) terminal surface, oiling joint (5) with expansion joint (6) intercommunication, be provided with seal assembly on going up flange (4) terminal surface, expansion joint (6) lower part intercommunication has lower flange, lower flange includes connecting pipe (8), the internal diameter of connecting pipe (8) is D3, D3= D2.
2. The expander for the oil-immersed current transformer according to claim 1, wherein the sealing assembly comprises a sealing ring and an explosion-proof sheet, the sealing ring and the explosion-proof sheet are detachably mounted on the upper flange (4) from bottom to top in sequence, the sealing ring and the explosion-proof sheet are both provided with oil filling joint mounting grooves, and the explosion-proof sheet is provided with a plurality of pressure relief grooves (10).
3. The expander for the oil-immersed current transformer according to claim 2, wherein a plurality of the pressure relief grooves (10) are intersected at the center of the explosion-proof sheet.
4. The expander for the oil-immersed current transformer according to claim 3, wherein the explosion-proof sheet is made of an aluminum alloy material.
5. The expander for the oil-immersed current transformer according to claim 1, wherein a mounting skirt (7) is arranged at the lower end of the connecting pipe (8), a plurality of transformer connecting holes (9) are arranged on the end face of the mounting skirt (7), and a shell mounting hole is arranged on the circumferential surface of the mounting skirt (7).
6. The expander for the oil-immersed current transformer according to claim 4, wherein the oil injection joint (5) is communicated with a one-way valve, and the one-way valve is communicated with the cavity of the expansion joint (6).
7. An oil-immersed current transformer, characterized by comprising the expander for the oil-immersed current transformer according to claim 5, and further comprising a current transformer housing (12), wherein an expander mounting disc (11) is arranged above the current transformer housing (12), and the mounting skirt (7) is detachably connected with the expander mounting disc (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221561891.4U CN217562365U (en) | 2022-06-21 | 2022-06-21 | Expander for oil-immersed current transformer and oil-immersed current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221561891.4U CN217562365U (en) | 2022-06-21 | 2022-06-21 | Expander for oil-immersed current transformer and oil-immersed current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217562365U true CN217562365U (en) | 2022-10-11 |
Family
ID=83502643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221561891.4U Active CN217562365U (en) | 2022-06-21 | 2022-06-21 | Expander for oil-immersed current transformer and oil-immersed current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217562365U (en) |
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2022
- 2022-06-21 CN CN202221561891.4U patent/CN217562365U/en active Active
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