CN114093614A - Oil-immersed transformer lifting seat and transformer - Google Patents
Oil-immersed transformer lifting seat and transformer Download PDFInfo
- Publication number
- CN114093614A CN114093614A CN202111366340.2A CN202111366340A CN114093614A CN 114093614 A CN114093614 A CN 114093614A CN 202111366340 A CN202111366340 A CN 202111366340A CN 114093614 A CN114093614 A CN 114093614A
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- Prior art keywords
- oil
- lifting seat
- transformer
- oil chamber
- sleeve
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- 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.)
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Links
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 229910052573 porcelain Inorganic materials 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 6
- 239000004519 grease Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to the technical field of transformers, in particular to an oil-immersed transformer lifting seat and a transformer, wherein the oil-immersed transformer lifting seat comprises a lifting seat lower section, an insulating separator and a lifting seat upper section, and the lifting seat lower section is arranged on a transformer oil tank; the insulating separator is arranged on the lower section of the lifting seat and is connected with the lower section of the lifting seat to form a first oil chamber; the upper section of the lifting seat is arranged on the insulating partition and connected with the insulating partition to enclose a second oil chamber, the upper section of the lifting seat is used for placing a sleeve, and the end part of the sleeve is positioned in the second oil chamber. The oil-immersed transformer lifting seat provided by the invention divides the oil chamber into the first oil chamber and the second oil chamber through the insulating partition, when the sleeve pipe is broken, the oil chamber cannot fall into the first oil chamber or the oil tank to influence the service life of the transformer, and when the sleeve pipe in operation is detected to have defect, crack and the like and needs to be replaced, only the oil in the second oil chamber needs to be released, so that the operation efficiency is high.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an oil-immersed transformer lifting seat and a transformer.
Background
The oil-immersed transformer is a core component of a power system and plays a role in voltage grade conversion and electric energy transmission. The winding lead of the transformer is led out of the transformer oil tank through a bushing, and the bushing with higher voltage grade (110kV and above) is generally an oil paper insulation capacitor bushing. The sleeve mainly uses an oil paper capacitor core as inner insulation, an upper porcelain bushing and a lower porcelain bushing as outer insulation, and insulating oil is filled between the core and the porcelain bushings. In order to meet the requirement of creepage distance, the lower porcelain bushing of the part of the bushing in the oil needs to have a certain length and needs to be installed on a special bushing lifting seat. Along with the improvement of the voltage grade of the electric power engineering, the insulation distance of the tail end of the sleeve is lengthened, and the lifting seat is required to be increased.
An oil chamber in a transformer lifting seat in the prior art is integrated, and when a running sleeve is detected to have defects and needs to be replaced, the oil level of a transformer needs to be placed below a sleeve wiring terminal. For a transformer (such as a valve side sleeve of a converter transformer) with a sleeve inclined out from the middle of an oil tank, the oil drainage amount is large, so that the oil injection amount is correspondingly increased after the sleeve is replaced, the sleeve needs to be statically placed for a long time after oil injection, the whole sleeve replacement period is prolonged, the maintenance and repair time is long, and the operation efficiency is low.
And the high-voltage bushing fault causes the oil tank to explode and causes the high risk of conflagration, is the high position that sends out of large-scale oil immersed transformer conflagration. When the inside of the sleeve discharges, the porcelain bushing often breaks, the capacitor core loses the support and sinks into the lifting seat, and the capacitor core easily falls into an oil tank, so that the safety of the transformer body is threatened, and the service life of the transformer is influenced.
Disclosure of Invention
The invention aims to provide an oil-immersed transformer lifting seat and a transformer, and aims to solve the problems that in the prior art, the oil injection amount is correspondingly increased after the replacement of a sleeve due to the fact that the oil discharge amount is large when the sleeve is replaced, the operation period is long, and the service life of the transformer is influenced due to the fact that the sleeve falls into an oil tank when being cracked.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, the present invention provides an oil-immersed transformer lifting seat, including:
the lower lifting seat section is arranged on the transformer oil tank;
the insulating separator is arranged on the lower section of the lifting seat and is connected with the lower section of the lifting seat to enclose a first oil chamber;
the lifting seat upper section is arranged on the insulating partition and connected with the insulating partition to enclose a second oil chamber, the lifting seat upper section is used for placing a sleeve, and the end part of the sleeve is positioned in the second oil chamber.
Preferably, the insulating spacer has a U-shaped cross section.
Preferably, a connection bus end is arranged on the insulating separator, one end of the connection bus end, which is located in the first oil chamber, is used for connecting a joint of the end part of the sleeve, and one end of the connection bus end, which is located in the second oil chamber, is used for connecting a leading-out wire of a winding.
Preferably, the connecting female end is a contact finger type female connector, the connector at the end part of the sleeve is a contact finger type male connector, and the contact finger type male connector is inserted into the contact finger type female connector.
Preferably, the oil pump further comprises a first oil inlet pipeline and a first oil outlet pipeline, the first oil inlet pipeline and the first oil outlet pipeline are both communicated with the first oil chamber, the first oil inlet pipeline is used for supplying oil to the second oil chamber, and the first oil outlet pipeline is used for discharging oil from the second oil chamber.
Preferably, a first oil inlet valve is arranged on the first oil inlet pipeline, and a first oil outlet valve is arranged on the first oil outlet pipeline.
Preferably, the oil feeding device further comprises a second oil inlet pipeline connected with the first oil inlet pipeline in parallel, a second oil inlet valve is arranged on the second oil inlet pipeline, and the second oil inlet pipeline is used for oil inlet of the first oil chamber.
Preferably, a first shielding ball and a second shielding ball which are located at the same center line are respectively arranged at two ends of the insulating separator, and the end of the sleeve is located in the first shielding ball.
Preferably, the insulating spacer is made of an epoxy resin impregnated glass fibre material.
On the other hand, the invention also provides a transformer which comprises the oil-immersed transformer lifting seat.
The invention has the beneficial effects that: compared with the transformer lifting seat of the integrated oil chamber in the prior art, the oil-immersed transformer lifting seat provided by the invention has the advantages that the oil chamber is divided into the first oil chamber and the second oil chamber by the insulating partition part, the end part of the sleeve is positioned in the second oil chamber, when the sleeve is broken, fragments can be remained in the second oil chamber and can not fall into the first oil chamber or the oil tank, so that the service life of a transformer is not influenced, meanwhile, when the sleeve needs to be replaced when the sleeve in operation is detected to have defect cracks and the like, the oil-immersed transformer lifting seat only needs to place the oil level in the second oil chamber below the end part of the sleeve when the sleeve is replaced, the oil quantity in the first oil chamber and the oil tank is not influenced, the oil discharge quantity is small, compared with the transformer lifting seat of the integrated oil chamber in the prior art, the oil-immersed transformer lifting seat has short oil discharge time and short period of re-oil injection after the sleeve is replaced, the operation efficiency is high.
The invention also provides a transformer, and a transformer lifting seat using the integrated oil chamber.
Drawings
Fig. 1 is a sectional view of the whole structure of an oil-immersed transformer lifting base according to the invention.
In the figure:
100. a first oil chamber;
200. a second oil chamber;
1. raising the lower section of the seat;
2. an insulating spacer; 21. connecting the female end;
3. lifting the upper section of the seat;
4. a sleeve; 41. an oil conservator; 42. an air side porcelain bushing; 43. a center conductor; 44. the oiled paper capacitor core; 45. a grounding sleeve; 46. porcelain bushing in oil;
5. a lead-out wire of the winding;
6. a first oil inlet pipeline; 61. a first oil feed valve;
7. a first oil outlet pipeline; 71. a first oil outlet valve;
8. a second oil inlet pipeline; 81. a second oil inlet valve;
9. a first shielding ball;
10. and a second shielding ball.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, the present invention provides an oil immersed transformer lifting seat, which includes a lifting seat lower section 1, an insulating separator 2 and a lifting seat upper section 3, wherein the lifting seat lower section 1 is disposed on a transformer oil tank; the insulating separator 2 is arranged on the lower lifting seat section 1 and is connected with the lower lifting seat section 1 to enclose a first oil chamber 100; the lifting seat upper section 3 is arranged on the insulating partition 2 and connected with the insulating partition 2 to enclose a second oil chamber 200, the lifting seat upper section 3 is used for placing a sleeve 4, and the end part of the sleeve 4 is positioned in the second oil chamber 200.
Furthermore, the sleeve 4 is connected with the upper section 3 of the lifting seat through an adapter flange, the sleeve 4 is arranged on the adapter flange in a penetrating manner, and the adapter flange is connected with the upper section 3 of the lifting seat, so that the sleeve 4 can be conveniently disassembled or replaced. The bushing 4 includes a conservator 41, an air-side porcelain bushing 42 (or simply referred to as an upper porcelain bushing), a center conductor 43, an oilpaper capacitor core 44, a grounding sleeve 45, and an oil-in-oil porcelain bushing 46 (or simply referred to as a lower porcelain bushing).
Compared with a transformer lifting seat with an integrated oil chamber in the prior art, the oil-immersed transformer lifting seat provided by the embodiment divides the oil chamber into the first oil chamber 100 and the second oil chamber 200 through the insulating partition 2, the end part of the sleeve 4 is positioned in the second oil chamber 200, when the sleeve 4 is broken, fragments can be left in the second oil chamber 200 and cannot fall into the first oil chamber 100 or an oil tank to influence the service life of the transformer, and meanwhile, when the sleeve 4 in operation is detected to have defect cracks and the like and needs to be replaced, the oil level needs to be placed below the end part of the sleeve 4. The transformer that the integral type grease chamber among the prior art rises the seat, especially to the transformer that the sleeve pipe inclines out from the oil tank middle part (for example converter transformer's valve side sleeve pipe 4), the volume that rises the seat and need the oil drain when changing the sleeve pipe is many, lead to sleeve pipe 4 to change the corresponding increase of back oiling volume, need long time after the oiling to quiet put, the cycle that whole sleeve pipe 4 was changed has been lengthened, and the oily formula transformer of this embodiment rises the seat when changing sleeve pipe 4 only need with the oil level in the second grease chamber 200 put to below the sleeve pipe 4 tip can, do not influence the oil mass in first grease chamber 100 and the oil tank, and the oil drain volume is little, compare in the transformer that the integral type grease chamber among the prior art rises the seat, the time cycle that the oily formula transformer of this embodiment rises the seat oil drain time and changes oiling again after sleeve pipe 4 is short, the operating efficiency height.
Specifically, the cross section of insulating separator 2 is the U-shaped, all be provided with the adaptor on two free ends, all be used for with rise seat upper segment 3 and rise seat hypomere 1 and connect and seal, the oil mass in the second grease chamber 200 can be ensured to the insulating separator 2 of U-shaped, as an alternative of this embodiment, when satisfying the requirement of the interior oil mass liquid level of second grease chamber 200, insulating separator 2 also can set to the disc, the cross-section is the linear type, the preparation material of insulating separator 2 has been saved.
Furthermore, the insulating separator 2 is provided with a connecting female end 21, one end of the connecting female end 21 located in the first oil chamber 100 is used for connecting a joint of the end part of the sleeve 4, one end of the connecting female end 21 located in the second oil chamber 200 is used for connecting a lead-out wire 5 of the winding so as to conduct a lead line in the sleeve 4, the joint of the end part of the sleeve 4 is directly plugged so as to complete the connection of the line, the process of repairing or maintaining the sleeve 4 is more convenient and faster, and the working efficiency of construction operation is improved.
Furthermore, in this embodiment, the connecting female end 21 is a finger-type female connector, the connector at the end of the sleeve 4 is a finger-type male connector, and the finger-type male connector is inserted into the finger-type female connector to connect the circuit, so that the connection is firm, the circuit is not easily broken, and the installation and the disassembly are convenient.
Specifically, the two ends of the insulating separator 2 are respectively provided with a first shielding ball 9 and a second shielding ball 10 which are concentric, the joint of the end part of the sleeve 4 is positioned in the first shielding ball 9, the connecting female end 21 is positioned in the first shielding ball 9 and the second shielding ball 10, and the shielding balls play a role in shielding an electric field and are used for shielding the electric field at the outgoing line 5 part of the contact finger type joint and the winding and preventing the electric field from generating interference to the outside.
Specifically, the oil-saving device further comprises a first oil inlet pipeline 6 and a first oil outlet pipeline 7, wherein the first oil inlet pipeline 6 and the first oil outlet pipeline 7 are both communicated with the first oil chamber 100, a first oil inlet valve 61 is arranged on the first oil inlet pipeline 6, a first oil outlet valve 71 is arranged on the first oil outlet pipeline 7, the first oil inlet pipeline 6 is used for supplying oil to the second oil chamber 200, and the first oil outlet pipeline 7 is used for discharging oil from the second oil chamber 200.
Furthermore, the oil-feeding device further comprises a second oil-feeding pipeline 8 connected with the first oil-feeding pipeline 6 in parallel, a second oil-feeding valve 81 is arranged on the second oil-feeding pipeline 8, the second oil-feeding valve 81 controls the on-off flow of the second oil-feeding pipeline 8, and the second oil-feeding pipeline 81 is connected with the first oil-feeding pipeline 6 in parallel, so that the oil feeding of the first oil chamber 100 and the oil feeding of the second oil chamber 200 are not interfered with each other.
Specifically, the insulating spacer 2 is made of an epoxy-impregnated glass fiber material which is excellent in mechanical properties, high in structural strength, higher in tensile strength than general structural steel, and capable of bearing the weight of the broken pieces of the sleeve 4 even if the sleeve 4 is completely broken.
The embodiment also provides a transformer which comprises the oil-immersed transformer lifting seat.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An oil-immersed transformer lifting seat is characterized by comprising:
the lower lifting seat section (1) is arranged on the transformer oil tank;
the insulating separator (2) is arranged on the lifting seat lower section (1) and is connected with the lifting seat lower section (1) to enclose a first oil chamber (100);
the lifting seat upper section (3) is arranged on the insulating partition (2) and connected with the insulating partition (2) to enclose a second oil chamber (200), the lifting seat upper section (3) is used for placing a sleeve (4), and the end part of the sleeve (4) is positioned in the second oil chamber (200).
2. Oil filled transformer lifting foot according to claim 1, characterized in that the insulating separator (2) is U-shaped in cross-section.
3. Oil filled transformer lifting foot according to claim 1, characterized in that a connection female (21) is provided on the insulating separator (2), said connection female (21) being located at one end of the first oil chamber (100) for connecting a joint at the end of the bushing (4), said connection female (21) being located at one end of the second oil chamber (200) for connecting a lead-out wire (5) of a winding.
4. Oil transformer lifting socket according to claim 3, characterized in that the connection female end (21) is a finger-touch female joint, the joint at the end of the bushing (4) is a finger-touch male joint, and the finger-touch male joint is plugged into the finger-touch female joint.
5. The oil-filled transformer lifting seat according to claim 1, further comprising a first oil inlet pipeline (6) and a first oil outlet pipeline (7), wherein the first oil inlet pipeline (6) and the first oil outlet pipeline (7) are both communicated with the first oil chamber (100), the first oil inlet pipeline (6) is used for supplying oil to the second oil chamber (200), and the first oil outlet pipeline (7) is used for discharging oil from the second oil chamber (200).
6. Oil filled transformer lifting seat according to claim 5, characterized in that a first oil inlet valve (61) is arranged on the first oil inlet pipeline (6) and a first oil outlet valve (71) is arranged on the first oil outlet pipeline (7).
7. The oil-filled transformer lifting seat according to claim 6, further comprising a second oil inlet pipeline (8) connected in parallel with the first oil inlet pipeline (6), wherein a second oil inlet valve (81) is arranged on the second oil inlet pipeline (8), and the second oil inlet pipeline (8) is used for oil inlet of the first oil chamber.
8. Oil filled transformer lifting seat according to claim 1, characterized in that the insulating separator (2) is provided with a first shielding ball (9) and a second shielding ball (10) at two ends with the same center line, respectively, and the end of the bushing (4) is located in the first shielding ball (9).
9. Oil filled transformer riser according to claim 1, characterized in that the insulating separator (2) is made of epoxy resin impregnated glass fibre material.
10. A transformer, characterized by comprising an oil filled transformer riser as defined in any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366340.2A CN114093614B (en) | 2021-11-18 | 2021-11-18 | Oil immersed transformer rising seat and transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111366340.2A CN114093614B (en) | 2021-11-18 | 2021-11-18 | Oil immersed transformer rising seat and transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114093614A true CN114093614A (en) | 2022-02-25 |
| CN114093614B CN114093614B (en) | 2024-07-02 |
Family
ID=80301439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111366340.2A Active CN114093614B (en) | 2021-11-18 | 2021-11-18 | Oil immersed transformer rising seat and transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114093614B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB267284A (en) * | 1926-02-12 | 1927-03-17 | Bruce Peebles & Company Ltd | Improvements in or relating to oil-immersed electric transformers |
| CN106504859A (en) * | 2016-12-01 | 2017-03-15 | 保定天威保变电气股份有限公司 | A kind of transformer device structure for high earthquake intensity area fast changeable sleeve pipe |
| CN209000717U (en) * | 2018-12-19 | 2019-06-18 | 保定天威保变电气股份有限公司 | A kind of Combined detachable outgoing line device |
| CN113096924A (en) * | 2021-03-31 | 2021-07-09 | 广东电网有限责任公司广州供电局 | Power transformer suitable for cable-through type sleeve |
-
2021
- 2021-11-18 CN CN202111366340.2A patent/CN114093614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB267284A (en) * | 1926-02-12 | 1927-03-17 | Bruce Peebles & Company Ltd | Improvements in or relating to oil-immersed electric transformers |
| CN106504859A (en) * | 2016-12-01 | 2017-03-15 | 保定天威保变电气股份有限公司 | A kind of transformer device structure for high earthquake intensity area fast changeable sleeve pipe |
| CN209000717U (en) * | 2018-12-19 | 2019-06-18 | 保定天威保变电气股份有限公司 | A kind of Combined detachable outgoing line device |
| CN113096924A (en) * | 2021-03-31 | 2021-07-09 | 广东电网有限责任公司广州供电局 | Power transformer suitable for cable-through type sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114093614B (en) | 2024-07-02 |
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