CN112103035B - Plug-in type oil-air sleeve 110kV transformer - Google Patents
Plug-in type oil-air sleeve 110kV transformer Download PDFInfo
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- CN112103035B CN112103035B CN202011008263.9A CN202011008263A CN112103035B CN 112103035 B CN112103035 B CN 112103035B CN 202011008263 A CN202011008263 A CN 202011008263A CN 112103035 B CN112103035 B CN 112103035B
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- bushing
- base
- sleeve
- transformer
- oil
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- 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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a plug-in type oil-air bushing 110kV transformer which comprises a lifting seat and a bushing arranged inside the lifting seat, wherein a bushing base is arranged between the lifting seat and the bushing, the bushing base is arranged inside the lifting seat, and the bushing is arranged inside the bushing base. The transformer is additionally provided with the sleeve base at the lifting seat, so that the oil-air sleeve oil middle end can be separated from the inner cavity of the transformer body, and the transformer sleeve can be quickly replaced without discharging the transformer oil of the body.
Description
Technical Field
The invention relates to a 110kV transformer using a plug-in type oil-air bushing, belonging to the invention technology of transformer products.
Background
Along with social development, the power consumption is rapidly increased, and the load of each transformer substation is larger and larger. When accessories such as transformer bushings and the like have faults, the repair and replacement time is particularly critical to the safe and economic operation of the transformer substation. At present, the middle end of transformer oil-air sleeve oil is directly installed inside a transformer oil tank (see fig. 1), when a sleeve fails, a plurality of links such as oil drainage, sleeve lead arrangement, sleeve replacement, vacuum pumping, oil injection, hot oil circulation, static discharge and the like are needed for sleeve replacement, the operation is complex, and a large amount of time is needed (the time needed by a 110kV transformer is not less than 144 hours).
Disclosure of Invention
In view of the above disadvantages, the present invention provides a 110kV transformer using a pluggable oil-air bushing. The transformer is additionally provided with the sleeve base at the lifting seat, so that the oil-air sleeve oil middle end can be separated from the inner cavity of the transformer body, and the transformer sleeve can be quickly replaced without discharging the transformer oil of the body.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a plug-in type oil-air bushing 110kV transformer which comprises a lifting seat and a bushing arranged inside the lifting seat.
The top of the sleeve base is connected with a sleeve base flange, the sleeve is connected with a sleeve flange, the lifting seat is connected to the lower part of the sleeve base flange, the upper part of the sleeve base flange is connected with a sleeve flange, and the sleeve is installed in the sleeve base through the sleeve flange; exhaust holes are formed in one side of the sleeve flange, insulating oil injection and vacuumizing holes are formed in the other side of the sleeve flange, and the insulating oil injection and vacuumizing holes are connected with the top of the oiling pipeline. The oil plug head of the plug-in type oil-air sleeve is in close contact with the contact of the base, and the wiring terminal at the lower part of the base is connected with the lead of the transformer, so that the sleeve is electrically connected with the transformer body.
The bushing structure is characterized in that a bushing plug head is arranged at the bottom end of the bushing, a bushing base contact is arranged at the position, corresponding to the bushing plug head, of the bottom of the bushing base, a bushing can be inserted into the bushing base under the matching action of the bushing plug head and the bushing base contact, a wiring terminal at the bottom of the bushing base contact is fixedly connected with a transformer lead connector lug, the transformer lead connector lug is fixed in a bushing contact voltage-sharing ball, and the bushing contact voltage-sharing ball is fixed at the bottom of the bushing base.
As a further improvement of the invention, the bottom side surface of the lifting seat is provided with a lifting seat hand hole which is convenient for connecting the phase line of the transformer to the lead connector lug.
As a further improvement of the invention, the pluggable oil-air bushing 110kV transformer further comprises a pressure balancing device, the upper end of the upper oil pipeline is connected with the insulating oil injection and vacuum-pumping hole, the lower end of the upper oil pipeline is respectively connected with one end of the first valve and one end of the pressure balancing device, the other end of the pressure balancing device is connected with the second valve, the other end of the first valve and the other end of the second valve are connected with the upper end of the lower oil pipeline, and the lower end of the lower oil pipeline is connected with the inside of the transformer.
The pressure balancing device comprises a cover plate, a capsule and a balancing cavity, the top of the balancing cavity is fixedly provided with the cover plate used for sealing the balancing cavity through a bolt, an oiling pipeline penetrates through the cover plate to extend into the balancing cavity, the capsule is sleeved at the end of the oiling pipeline and communicated with the inner cavity of the sleeve base through the oiling pipeline, and the lower end of the balancing cavity is directly connected with the oil discharging pipeline and connected with the inside of the transformer.
Compared with the prior art, the invention has the beneficial effects that:
the invention is realized by separating the oil part of the plug-in oil-air bushing from the oil tank of the transformer through a bushing base. When the plug-in type oil-air bushing transformer is used for replacing a fault bushing, only the bushing and the bushing base inner cavity oil need to be replaced. The middle end of the existing transformer oil-air bushing oil is directly installed inside an oil tank of a transformer, when the bushing fails, a transformer body needs to be subjected to oil discharge, bushing lead arrangement, bushing replacement, vacuumizing, oil injection, hot oil circulation, static discharge and the like, and the 110kV transformer needs not less than 144 hours. Compared with the current transformer, the plug-in oil-air bushing transformer saves not less than 136 hours when the fault bushing is replaced. A large number of transformer bushing faults occur in the whole power grid, and rapid fault removal and recovery play an important role in economic and safe operation of the power grid.
Drawings
Fig. 1 is a schematic view of a conventional oil-air bushing transformer bushing portion.
Fig. 2 is a schematic diagram of a plug-in type oil-air bushing 110kV transformer bushing part.
Fig. 3 is a schematic structural diagram of the pressure balancing device.
The device comprises a lifting seat hand hole 1, a sleeve base 2, a sleeve 3, a sleeve base flange 4, an exhaust hole 5, an insulating oil injection and vacuum pumping hole 6, an oiling pipeline 7, a first valve 8, a pressure balancing device 9, a cover plate 91, a capsule 92, a balancing cavity 93, a second valve 10, an oil discharging pipeline 11, a sleeve contact pressure equalizing ball 12, a sleeve plug head 13, a sleeve base contact 14, a lead wire connector lug 15, a lifting seat 16 and a sleeve flange 17.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings.
Example 1: as shown in fig. 2, the present invention provides a plug-in type oil-air bushing 110kV transformer, which comprises a lifting seat 16, a bushing 3 installed inside the lifting seat 16, a bushing base 2 further installed between the lifting seat 16 and the bushing 3, the bushing base 2 installed inside the lifting seat 16, and the bushing 3 installed inside the bushing base 2. The bottom of sleeve pipe 3 is equipped with sleeve pipe plug head 13, and the position that the bottom of sleeve pipe base 2 corresponds sleeve pipe plug head 13 is equipped with supporting sleeve pipe base contact 14, and the cooperation through sleeve pipe plug head 13 and sleeve pipe base contact 14 makes sleeve pipe 3 can insert in sleeve pipe base 2, and binding post and transformer lead wire connector lug 15 fixed connection of sleeve pipe base contact 14 bottom, and transformer lead wire connector lug 15 is fixed in sleeve pipe contact voltage-sharing ball 12, and sleeve pipe contact voltage-sharing ball 12 is fixed in the bottom of sleeve pipe base 2. The top of the sleeve base 2 is connected with a sleeve base flange 4, the sleeve 3 is connected with a sleeve flange 17, the lifting seat 16 is connected with the lower part of the sleeve base flange 4, the upper part of the sleeve base flange 4 is connected with the sleeve flange 17, and the sleeve 3 is arranged in the sleeve base 2 through the sleeve flange 17; exhaust holes 5 are formed in one side of the sleeve flange 17, insulating oil injection and vacuumizing holes 6 are formed in the other side of the sleeve flange 17, and the insulating oil injection and vacuumizing holes 6 are connected with the top of an oil feeding pipeline 7. The side surface of the bottom of the lifting seat 16 is provided with a lifting seat hand hole 1 which is convenient for connecting a phase line of the transformer to the lead connector 15.
The sleeve base flange and the sleeve base contact are respectively bonded with the sleeve base (epoxy glass fiber base) to form a whole (sleeve base). When the bushing is installed, the bushing flange and the bushing base flange are sealed through the sealing ring, so that an inner cavity of the bushing base forms a closed space, and the purpose of separating an oil-air bushing oil middle end from an inner cavity of the transformer body is achieved.
A plug-in type oil-air bushing 110kV transformer comprises the following bushing installation steps:
1. mounting the well-bonded sleeve base on a transformer lifting seat;
2. connecting a phase line of the transformer to a wiring terminal at the lower part of the sleeve base contact through a lifting base hand hole;
3. installing a sleeve contact voltage-sharing ball on a sleeve base contact to realize the action of a uniform electric field;
4. the plug-in type oil-air sleeve is arranged on a sleeve base flange through a guide device such as a guide rod, and a sleeve plug head is tightly contacted with a sleeve base contact;
5. through the insulating oil injection and vacuum-pumping holes, firstly vacuum-pumping is carried out, and then the insulating oil is injected;
6. after standing, the air in the inner cavity of the sleeve base is evacuated through the vent hole.
Example 2: referring to fig. 2 and 3, in order to prevent the sleeve base from being damaged due to thermal expansion and contraction of the insulating oil, a pressure balance device 9 is installed through the insulating oil injection and vacuum-pumping holes.
The upper end of the upper oil pipeline 7 is connected with the insulating oil injection and vacuum-pumping hole 6, the lower end of the upper oil pipeline is respectively connected with one end of a first valve 8 and one end of a pressure balancing device 9, the other end of the pressure balancing device 9 is connected with a second valve 10, the other end of the first valve 8 and the other end of the second valve 10 are connected with the upper end of a lower oil pipeline 11, and the lower end of the lower oil pipeline 11 is connected with the inside of a transformer.
The pressure balancing device 9 comprises a cover plate 91, a capsule 92 and a balancing cavity 93, the top of the balancing cavity 93 is fixedly provided with the cover plate 91 used for sealing the balancing cavity 93 through bolts, an oil feeding pipeline 7 penetrates through the cover plate 91 and extends into the balancing cavity 93, the capsule 92 is sleeved at the end part of the oil feeding pipeline 7 and is communicated with the inner cavity of the sleeve base 2 through the oil feeding pipeline 7, and the lower end of the balancing cavity 93 is directly connected with the oil feeding pipeline 11 and is connected with the inside of the transformer.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention without departing from the spirit and scope of the invention.
Claims (3)
1. A plug-in type oil-air bushing 110kV transformer comprises a lifting seat (16) and a bushing (3) installed inside the lifting seat (16), and is characterized in that a bushing base (2) is further arranged between the lifting seat (16) and the bushing (3), the bushing base (2) is installed inside the lifting seat (16), and the bushing (3) is installed inside the bushing base (2); the top of the sleeve base (2) is connected with a sleeve base flange (4), the sleeve (3) is connected with a sleeve flange (17), the lifting seat (16) is connected to the lower part of the sleeve base flange (4), the upper part of the sleeve base flange (4) is connected with the sleeve flange (17), and the sleeve (3) is installed in the sleeve base (2) through the sleeve flange (17); one side of the sleeve flange (17) is provided with an exhaust hole (5), the other side of the sleeve flange is provided with an insulating oil injection and vacuum-pumping hole (6), and the insulating oil injection and vacuum-pumping hole (6) is connected with the top of the oiling pipeline (7);
the transformer oil feeding device is characterized by further comprising a pressure balancing device (9), the upper end of the upper oil pipeline (7) is connected with the insulating oil injection and vacuum-pumping hole (6), the lower end of the upper oil pipeline is respectively connected with one end of the first valve (8) and one end of the pressure balancing device (9), the other end of the pressure balancing device (9) is connected with the second valve (10), the other end of the first valve (8) and the other end of the second valve (10) are connected with the upper end of the oil discharging pipeline (11), and the lower end of the oil discharging pipeline (11) is connected with the inside of the transformer;
pressure balancing unit (9) are including apron (91), capsule (92) and balanced cavity (93), the top of balanced cavity (93) is fixed with through the bolt and is used for carrying out sealed apron (91) to balanced cavity (93), oiling pipeline (7) pass apron (91) stretch into in balanced cavity (93), the tip of last oil pipe way (7) is cup jointed in capsule (92), and communicate through the inner chamber of oiling pipeline (7) with sleeve pipe base (2), balanced cavity (93) lower extreme and lower oil pipe way (11) lug connection, connect inside the transformer.
2. The plug-in type oil-air bushing 110kV transformer according to claim 1, wherein a bushing plug head (13) is provided at the bottom end of the bushing (3), a bushing base contact (14) is provided at the bottom of the bushing base (2) at a position corresponding to the bushing plug head (13), the bushing (3) can be inserted into the bushing base (2) by the cooperation of the bushing plug head (13) and the bushing base contact (14), the connection terminal at the bottom of the bushing base contact (14) is fixedly connected with the transformer lead connector (15), the transformer lead connector (15) is fixed in the bushing contact pressure equalizing ball (12), and the bushing contact pressure equalizing ball (12) is fixed at the bottom of the bushing base (2).
3. The plug-in type oil-air bushing 110kV transformer according to claim 1, wherein the bottom side of the lifting base (16) is provided with a lifting base hand hole (1) for facilitating connection of a phase wire of the transformer to a lead connector (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008263.9A CN112103035B (en) | 2020-09-23 | 2020-09-23 | Plug-in type oil-air sleeve 110kV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008263.9A CN112103035B (en) | 2020-09-23 | 2020-09-23 | Plug-in type oil-air sleeve 110kV transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112103035A CN112103035A (en) | 2020-12-18 |
| CN112103035B true CN112103035B (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011008263.9A Active CN112103035B (en) | 2020-09-23 | 2020-09-23 | Plug-in type oil-air sleeve 110kV transformer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113096925B (en) * | 2021-03-31 | 2023-03-28 | 广东电网有限责任公司广州供电局 | Power transformer suitable for guide rod type sleeve |
| CN113257524B (en) * | 2021-05-10 | 2022-08-16 | 山东电力设备有限公司 | Gas collection preventing method for extra-high voltage reactor lifting seat |
| CN113496807B (en) * | 2021-06-07 | 2023-11-03 | 山东电力设备有限公司 | Sleeve flange continuous exhaust method and continuous exhaust structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024549A (en) * | 2009-09-18 | 2011-04-20 | 特变电工沈阳变压器集团有限公司 | Ground-mounted oil storage cabinet |
| CN211045232U (en) * | 2020-01-08 | 2020-07-17 | 西安神电高压电器有限公司 | Fully-sealed outlet sleeve |
-
2020
- 2020-09-23 CN CN202011008263.9A patent/CN112103035B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024549A (en) * | 2009-09-18 | 2011-04-20 | 特变电工沈阳变压器集团有限公司 | Ground-mounted oil storage cabinet |
| CN211045232U (en) * | 2020-01-08 | 2020-07-17 | 西安神电高压电器有限公司 | Fully-sealed outlet sleeve |
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| Publication number | Publication date |
|---|---|
| CN112103035A (en) | 2020-12-18 |
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