CN113903551A - SF (sulfur hexafluoride)6Structure and method for vacuumizing box edge of gas-insulated transformer - Google Patents
SF (sulfur hexafluoride)6Structure and method for vacuumizing box edge of gas-insulated transformer Download PDFInfo
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- CN113903551A CN113903551A CN202111246820.5A CN202111246820A CN113903551A CN 113903551 A CN113903551 A CN 113903551A CN 202111246820 A CN202111246820 A CN 202111246820A CN 113903551 A CN113903551 A CN 113903551A
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- box
- edge
- box edge
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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
- H01F27/022—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/005—Impregnating or encapsulating
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to SF6A vacuum box edge structure and a method for a gas insulated transformer belong to the technical field of transformers. The technical scheme is as follows: the lower part of the box cover (2) is welded with a plurality of limiting fixing plates (3) at intervals along the inner diameter side of the lower box edge (1), the limiting fixing plates (3) are welded on the lower surface of the box cover (2), and the limiting fixing plates (3) are tightly matched and attached to the inner diameter side of the lower box edge and are used for supporting the lower box edge (1) during vacuum pumping so as to ensure the mechanical strength of the box edge during vacuum pumping; the outer side of the limiting fixing plate (3) is chamfered, so that the upper box edge and the lower box edge can be conveniently installed; a sealing rubber gasket (4) is arranged between the box cover (2) and the lower box edge (1), so that the sealing performance of the box edge is ensured during vacuum pumping. The invention has the beneficial effects that: SF6The gas-insulated transformer can be vacuumized without welding the tank edge, has simple structure, convenient operation, safety and reliability, can be used without disassembly before and after welding the tank edgeSimilar to the vacuum pumping operation of other similar devices.
Description
Technical Field
The invention relates to SF6A vacuum box edge structure and a method for a gas insulated transformer belong to the technical field of transformers.
Background
At present, SF6Gas insulated transformer with SF6Gas is an insulating medium, and compared with the traditional oil immersed transformer, the internal operation pressure of the gas transformer is high, and the sealing performance requirement is strict, so that the gas tank is filled with SF6The tank edge must be welded before the gas is introduced, so that the gas tank is integrated to bear the test pressure of the gas-insulated transformer. For SF6The gas insulated transformer is characterized in that the production process carries out vacuum-pumping operation after the welding of the tank edge is finished, the vacuum operation is an essential key process for manufacturing and producing the transformer and aims to discharge residual moisture in the transformer body and ensure that SF is charged6Is vacuumized and filled with SF6A gas. However, in the actual production process, the assembly of the transformer body from the drying furnace discharging to the welding box edge is completed, the operation period is long, the exposure time of the transformer body and the like is long, the vacuum pumping cannot be carried out in time, and the possibility of moisture exists. Therefore, in order to ensure the product quality, the tank edge needs to be vacuumized before welding, but the structure of the gas tank edge in the prior art cannot meet the requirement of vacuumizing performance.
Disclosure of Invention
The invention aims to provide SF6The structure and the method of the vacuum-pumping box edge of the gas-insulated transformer have simple structure, convenient operation, safety and reliability, and are suitable for SF6The gas insulated transformer carries out vacuum pumping operation under the condition of not welding the box edge, and solves the technical problems in the prior art.
The technical scheme of the invention is as follows:
SF (sulfur hexafluoride)6Gas insulationThe edge structure of the edge transformer vacuum-drawable box comprises a lower box edge, a box cover, limiting fixing plates and a sealing rubber pad, wherein the lower part of the box cover is welded with a plurality of limiting fixing plates at intervals along the inner diameter side of the lower box edge; the outer side of the limiting fixing plate is chamfered, so that the upper box edge and the lower box edge can be conveniently installed; and a sealing rubber gasket is arranged between the box cover and the lower box edge, so that the sealing performance of the box edge is ensured during vacuum pumping.
The lower box edge is vertically welded on the top of the wall of the gas box, and the lower box edge is arranged in parallel with the box cover.
SF (sulfur hexafluoride)6The use method of the vacuum-pumping box edge structure of the gas-insulated transformer comprises the following steps:
when the gas box is manufactured, vacuumizing operation is carried out under the condition that the box edge is not welded;
welding a plurality of limiting fixing plates at the bottom of the box cover along the inner diameter side of the lower box at intervals, wherein the number of the limiting fixing plates is determined according to the structural size of the air box; before the box cover is buckled, a sealing rubber gasket is fixed on the upper surface of the lower box edge; after the box cover is buckled, the box cover and the lower box edge are clamped tightly by a C-shaped clamp, and after the installation is finished, the air box is vacuumized; the vacuumizing operation is used for discharging residual moisture in the device body, after the vacuumizing operation is carried out, the device body enters a drying furnace for drying, after the device body is discharged from the furnace, the box edge and the box cover are welded, and SF is charged into the box edge and the box cover6A gas.
The invention has the beneficial effects that: SF6The gas-insulated transformer can be vacuumized without welding the box edge, has simple structure, convenient operation, safety and reliability, does not need to be disassembled before and after welding the box edge, and can be used for vacuuming other similar equipment.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: the lower box edge 1, the box cover 2, the limiting fixing plate 3, the sealing rubber mat 4 and the air box wall 5.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
SF (sulfur hexafluoride)6The structure of the vacuum-pumping box edge of the gas-insulated transformer comprises a lower box edge 1, a box cover 2, limiting fixing plates 3 and a sealing rubber mat 4, wherein the lower part of the box cover 2 is welded with a plurality of limiting fixing plates 3 at intervals along the inner diameter side of the lower box edge 1, the limiting fixing plates 3 are welded on the lower surface of the box cover 2, and the limiting fixing plates 3 are tightly matched and attached to the inner diameter side of the lower box edge for supporting the lower box edge 1 during vacuum pumping and ensuring the mechanical strength of the box edge during vacuum pumping; the outer side of the limiting fixing plate 3 is chamfered, so that the mounting operation of the upper box edge and the lower box edge is facilitated; and a sealing rubber gasket 4 is arranged between the box cover 2 and the lower box edge 1, so that the sealing performance of the box edge during vacuumizing is ensured.
The lower box edge 1 is vertically welded to the top of the wall 5 of the gas box, and the lower box edge 1 and the box cover 2 are arranged in parallel.
SF (sulfur hexafluoride)6The use method of the vacuum-pumping box edge structure of the gas-insulated transformer comprises the following steps:
when the gas box is manufactured, vacuumizing operation is carried out under the condition that the box edge is not welded;
welding a plurality of limiting fixing plates 3 at the bottom of the box cover 2 along the inner diameter side of the lower box edge at intervals, wherein the number of the limiting fixing plates 3 is determined according to the structural size of the air box; before the box cover 2 is buckled, a sealing rubber gasket 4 is fixed on the upper surface of the lower box edge 1; after the box cover 2 is buckled, the box cover 2 and the lower box edge 1 are clamped tightly by a C-shaped clamp, and after the installation is finished, the air box is vacuumized.
The vacuumizing operation is used for discharging residual moisture in the device body, after the vacuumizing operation is carried out, the device body enters a drying furnace for drying, after the device body is discharged from the furnace, the box edge is welded with the box cover 2, and SF is charged into the box edge6A gas.
Claims (3)
1. SF (sulfur hexafluoride)6But gas insulation transformer evacuation case is along structure, its characterized in that: comprises a lower box edge (1), a box cover (2), a plurality of limiting fixing plates (3) and a sealing rubber gasket (4), wherein the lower part of the box cover (2) is welded with the plurality of limiting fixing plates (3) at intervals along the inner diameter side of the lower box edge (1), the limiting fixing plates (3) are welded on the lower surface of the box cover (2), the limiting fixing plates (3) are tightly matched and attached with the inner diameter side of the lower box edge for supporting the lower box edge (1) during vacuum pumping,the mechanical strength of the box edge is ensured during vacuum pumping; the outer side of the limiting fixing plate (3) is chamfered, so that the upper box edge and the lower box edge can be conveniently installed; a sealing rubber gasket (4) is arranged between the box cover (2) and the lower box edge (1), so that the sealing performance of the box edge is ensured during vacuum pumping.
2. SF according to claim 16But gas insulation transformer evacuation case is along structure, its characterized in that: the lower box edge (1) is vertically welded to the top of the wall (5) of the gas box, and the lower box edge (1) and the box cover (2) are arranged in parallel.
3. SF (sulfur hexafluoride)6The use method of the edge structure of the evacuable tank of the gas-insulated transformer is characterized by comprising the following steps of:
when the gas box is manufactured, vacuumizing operation is carried out under the condition that the box edge is not welded; welding a plurality of limiting fixing plates (3) at the bottom of the box cover (2) along the inner diameter side of the lower box at intervals, wherein the number of the limiting fixing plates (3) is determined according to the structural size of the air box; before the box cover (2) is buckled, a sealing rubber gasket (4) is fixed on the upper surface of the lower box edge (1); after the box cover (2) is buckled, the box cover (2) and the lower box edge (1) are clamped tightly by a C-shaped clamp, and the air box is vacuumized after the installation is finished; the vacuumizing operation is used for discharging residual moisture in the device body, after the vacuumizing operation is carried out, the device body enters a drying furnace for drying, after the device body is discharged from the furnace, the box edge is welded with the box cover (2), and SF is charged into the box edge6A gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246820.5A CN113903551A (en) | 2021-10-26 | 2021-10-26 | SF (sulfur hexafluoride)6Structure and method for vacuumizing box edge of gas-insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246820.5A CN113903551A (en) | 2021-10-26 | 2021-10-26 | SF (sulfur hexafluoride)6Structure and method for vacuumizing box edge of gas-insulated transformer |
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| Publication Number | Publication Date |
|---|---|
| CN113903551A true CN113903551A (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111246820.5A Withdrawn CN113903551A (en) | 2021-10-26 | 2021-10-26 | SF (sulfur hexafluoride)6Structure and method for vacuumizing box edge of gas-insulated transformer |
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| CN (1) | CN113903551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451334A (en) * | 2022-09-15 | 2022-12-09 | 湖南长高成套电器有限公司 | On-site vacuumizing and inflating system and method for inflatable ring main unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057157A1 (en) * | 1999-05-05 | 2002-05-16 | Sakari Laine | Transformer |
| CN206921624U (en) * | 2017-06-22 | 2018-01-23 | 山西省工业设备安装集团有限公司 | A kind of transformer enclosed construction |
| CN111009390A (en) * | 2019-12-09 | 2020-04-14 | 天威保变(合肥)变压器有限公司 | Box edge welding structure for full-sealed transformer |
| CN211237915U (en) * | 2020-01-10 | 2020-08-11 | 正泰电气股份有限公司 | Full-sealed welding structure of transformer box edge |
-
2021
- 2021-10-26 CN CN202111246820.5A patent/CN113903551A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057157A1 (en) * | 1999-05-05 | 2002-05-16 | Sakari Laine | Transformer |
| CN206921624U (en) * | 2017-06-22 | 2018-01-23 | 山西省工业设备安装集团有限公司 | A kind of transformer enclosed construction |
| CN111009390A (en) * | 2019-12-09 | 2020-04-14 | 天威保变(合肥)变压器有限公司 | Box edge welding structure for full-sealed transformer |
| CN211237915U (en) * | 2020-01-10 | 2020-08-11 | 正泰电气股份有限公司 | Full-sealed welding structure of transformer box edge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451334A (en) * | 2022-09-15 | 2022-12-09 | 湖南长高成套电器有限公司 | On-site vacuumizing and inflating system and method for inflatable ring main unit |
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Application publication date: 20220107 |
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| WW01 | Invention patent application withdrawn after publication |