CN110265208B - Oil immersed transformer convenient to clearance oil duct - Google Patents
Oil immersed transformer convenient to clearance oil duct Download PDFInfo
- Publication number
- CN110265208B CN110265208B CN201910599692.9A CN201910599692A CN110265208B CN 110265208 B CN110265208 B CN 110265208B CN 201910599692 A CN201910599692 A CN 201910599692A CN 110265208 B CN110265208 B CN 110265208B
- Authority
- CN
- China
- Prior art keywords
- oil
- delivery pipe
- tank
- control valve
- oil tank
- 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.)
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Links
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000002828 fuel tank Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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
- H01F27/085—Cooling by ambient air
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
The invention discloses an oil immersed transformer convenient for cleaning an oil duct, which comprises an oil tank and a second oil delivery pipe, wherein an oil conservator is arranged on the upper side of the oil tank, the left side of the bottom of the oil conservator is communicated with the left side of the bottom of the oil tank, the right side of the bottom of the oil conservator is communicated with the left side of the top of the oil tank, an iron core is arranged in the oil tank, a winding is arranged on the iron core, a liquid pump is arranged at the bottom of the inner side of the oil tank, a circulating inlet is arranged at the bottom of the liquid pump, a first control valve is arranged in the circulating inlet, the circulating inlet penetrates through the bottom of the oil tank and is connected with the first oil delivery pipe, and first sealing covers are arranged at the front end and the rear end of the first oil delivery pipe. This oil-immersed transformer convenient to clearance oil duct is provided with first oil pipe, first sealed lid, second oil pipe and second sealed lid, closes first control valve and second control valve, opens first sealed lid and second sealed lid, can clear up first oil pipe and second oil pipe when not changing whole cooling oil.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an oil immersed transformer convenient for cleaning an oil duct.
Background
In the process of power transmission, the voltage determines the transmission distance of power, and after the power is transmitted to a power utilization area, the high-voltage cannot be directly used, so that a transformer is needed.
The existing oil-immersed transformer oil way integrated structure has the advantages that a large amount of heat is generated during operation of an iron core and a winding, cooling oil absorbs the heat to dissipate the heat, the cooling oil works at high temperature for a long time, impurities are easy to generate due to contact with a box body and a pipeline, the impurities are accumulated in an oil duct to affect the heat dissipation effect, and the existing equipment is required to be improved.
Disclosure of Invention
The invention aims to provide an oil immersed transformer convenient for cleaning an oil duct, which aims to solve the problems that the existing oil immersed transformer oil duct integrated structure is provided in the background art, a large amount of heat is generated by an iron core and a winding during working, cooling oil absorbs the heat to dissipate heat, the cooling oil is easy to generate impurities when working at high temperature for a long time and is contacted with a box body and a pipeline, and the heat dissipation effect is influenced by accumulation of the impurities in the oil duct.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an oil-immersed transformer convenient to clearance oil duct, includes oil tank and second oil delivery pipe, the oil tank upside is provided with the conservator, and the conservator bottom left side communicates with each other with oil tank bottom left side, and the conservator bottom right side communicates with each other with oil tank top left side simultaneously, the inside iron core that is provided with of oil tank, and be provided with the winding on the iron core, the inboard bottom of oil tank is provided with the liquid pump, and the liquid pump bottom is provided with the circulation entry, the inside first control valve that is provided with of circulation entry, and the circulation entry runs through oil tank bottom and be connected with first oil delivery pipe, and both ends are provided with first sealed lid around the first oil delivery pipe simultaneously, the second oil delivery pipe downside is connected with first oil delivery pipe, and the second oil delivery pipe upside is connected with the circulation export, both ends are provided with the second sealed lid about the second oil delivery pipe, and the second oil delivery pipe outside is provided with cooling fan, the circulation export runs through the oil tank setting at winding top rear side, and the inside second control valve that is provided with of circulation export.
Preferably, three liquid pumps are arranged, and 3 liquid pumps are arranged at the bottom of the winding.
Preferably, the circulating inlet, the first control valve, the circulating outlet and the second control valve are all provided with three groups, and the inner diameter of the circulating inlet is consistent with the inner diameter of the circulating outlet.
Preferably, the first oil delivery pipe and the second oil delivery pipe are both provided with three groups, and the first oil delivery pipe and the second oil delivery pipe are vertically intersected.
Preferably, the first sealing cover is connected with the first oil delivery pipe in a threaded manner.
Preferably, the cooling fans are provided in three groups, and each group of cooling fans is provided in two.
Compared with the prior art, the invention has the beneficial effects that: the oil immersed transformer convenient for cleaning the oil duct,
(1) The device is provided with a liquid pump, a circulating inlet and a circulating outlet, wherein the liquid pump is used for pumping cooled cooling oil through the circulating inlet, the cooling oil cools the iron core and the winding, the temperature of the cooling oil after absorbing heat is increased, the cooling oil moves upwards, meanwhile, the circulating outlet is used for sucking the heated cooling oil under the action of pressure difference, and a plurality of groups of liquid pumps cool the iron core and the winding, so that the over-high temperature of the iron core and the winding is prevented, and the working efficiency of the transformer is prevented from being influenced;
(2) The first oil conveying pipe, the first sealing cover, the second oil conveying pipe and the second sealing cover are arranged, the first control valve and the second control valve are closed, the first sealing cover and the second sealing cover are opened, and the first oil conveying pipe and the second oil conveying pipe can be cleaned when all cooling oil is not replaced.
Drawings
FIG. 1 is a schematic view of a front view in cross section;
FIG. 2 is a schematic diagram of a right side view and cross-section structure of the present invention;
FIG. 3 is a schematic rear view of the present invention;
Fig. 4 is an enlarged schematic view of the structure of the point a in fig. 2 according to the present invention.
In the figure: 1. the oil tank, 2, the conservator, 3, the iron core, 4, the winding, 5, the liquid pump, 6, the circulation inlet, 7, the first control valve, 8, the first oil delivery pipe, 9, the first sealing cover, 10, the second oil delivery pipe, 11, the circulation outlet, 12, the second sealing cover, 13, the cooling fan, 14, the second control valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution: as shown in fig. 1 and 2, an oil conservator 2 is arranged on the upper side of an oil tank 1, the left side of the bottom of the oil conservator 2 is communicated with the left side of the bottom of the oil tank 1, meanwhile, the right side of the bottom of the oil conservator 2 is communicated with the left side of the top of the oil tank 1, an iron core 3 is arranged in the oil tank 1, a winding 4 is arranged on the iron core 3, a liquid pump 5 is arranged at the bottom of the inner side of the oil tank 1, a circulating inlet 6 is arranged at the bottom of the liquid pump 5, three liquid pumps 5 are arranged at the bottom of the winding 4, three liquid pumps 5 are uniformly arranged at the bottoms of the winding 4 and the iron core 3, the liquid pumps 5 are convenient for conveying cooling oil to dissipate heat of the winding 4 and the iron core 3, three groups of circulating inlets 6, a first control valve 7, a circulating outlet 11 and a second control valve 14 are all arranged, the inner diameter of the circulating inlet 6 is consistent with the inner diameter of the circulating outlet 11, the circulating inlet 6 is kept the same as the flow of the circulating outlet 11, and the liquid pump 5 is prevented from pumping insufficient cooling oil to cool the winding 4 and the iron core 3.
As shown in fig. 1, fig. 2 and fig. 4, the first control valve 7 is arranged in the circulation inlet 6, the circulation inlet 6 penetrates through the bottom of the oil tank 1 and is connected with the first oil delivery pipe 8, meanwhile, the first sealing covers 9 are arranged at the front end and the rear end of the first oil delivery pipe 8, three groups of the first oil delivery pipe 8 and the second oil delivery pipe 10 are respectively arranged, the first oil delivery pipe 8 and the second oil delivery pipe 10 are vertically intersected, the first sealing covers 9 are connected with the first oil delivery pipe 8 in a threaded mode, the first control valve 7 and the second control valve 14 are closed, the first sealing covers 9 and the second sealing covers 12 are opened, the oil duct inside the transformer is cleaned conveniently, adhering dirt in the oil duct is reduced, and the service time of cooling oil is prolonged.
As shown in fig. 2 and 3, the lower side of the second oil delivery pipe 10 is connected with the first oil delivery pipe 8, the upper side of the second oil delivery pipe 10 is connected with the circulating outlet 11, the upper end and the lower end of the second oil delivery pipe 10 are provided with the second sealing covers 12, the outer side of the second oil delivery pipe 10 is provided with the cooling fans 13, the cooling fans 13 are provided with three groups, each group of cooling fans 13 is provided with two, the cooling fans 13 cool the cooling oil in the second oil delivery pipe 10, the overheated cooling oil cannot cool the iron core 3 and the winding 4 effectively, the iron core 3 is short-circuited to cause accidents, the circulating outlet 11 penetrates through the oil tank 1 to be arranged at the rear side of the top of the winding 4, and the inside of the circulating outlet 11 is provided with the second control valve 14.
Working principle: when the oil immersed transformer for cleaning the oil duct is used, firstly, the oil tank 1, the first oil delivery pipe 8 and the second oil delivery pipe 10 are fully filled with cooling oil, meanwhile, enough cooling oil is reserved in the oil conservator 2, the first control valve 7 and the second control valve 14 are closed, the first sealing cover 9 and the second sealing cover 12 are opened, after the cooling oil in the first oil delivery pipe 8 and the second oil delivery pipe 10 flows dry, the first oil delivery pipe 8 and the second oil delivery pipe 10 are flushed, corrosion stains on the inner walls of the first oil delivery pipe 8 and the second oil delivery pipe 10 are cleaned, the first sealing cover 9 and the second sealing cover 12 are closed, the first control valve 7 and the second control valve 14 are opened, the cooling oil in the oil tank 1 enters the first oil delivery pipe 8 and the second oil delivery pipe 10, the cooling oil lacking in the oil conservator 2 is filled with the cooling oil in the oil conservator 2, an external power supply is connected, the liquid pump 5 is started, the cooling oil in the first oil delivery pipe 8 is pumped to cool the iron core 3 and the winding 4, the cooling oil after absorbing heat moves upwards, under the action of pressure difference, the cooling oil enters the second oil delivery pipe 10 through the circulation outlet 11 to cool the second oil delivery pipe 10, the cooling oil enters the cooling fan 10, the cooling oil in the cooling pipe 10 is cooled by the cooling oil outside of the cooling pipe is cooled by the cooling fan, and the cooling oil is cooled by the cooling oil in the cooling fan is cooled by the cooling fan, which is well known in the prior art.
The terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for descriptive simplicity and convenience only and not as an indication or implying that the apparatus or element being referred to must have a particular orientation, be constructed and operated for a particular orientation, based on the orientation or positional relationship illustrated in the drawings, and thus should not be construed as limiting the scope of the present invention.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (4)
1. The utility model provides an oil-immersed transformer convenient to clearance oil duct, includes oil tank (1) and second oil delivery pipe (10), its characterized in that: the utility model discloses a fuel tank, including oil tank (1), oil conservator (2), oil tank (1) and oil tank (1) are provided with oil conservator (2), oil conservator (2) bottom left side communicates with each other with oil tank (1) bottom left side, oil tank (1) inside is provided with iron core (3), and is provided with winding (4) on iron core (3), oil tank (1) inboard bottom is provided with liquid pump (5), and liquid pump (5) bottom is provided with circulation entry (6), liquid pump (5) are provided with three, and 3 liquid pump (5) all set up in winding (4) bottom, circulation entry (6) inside is provided with first control valve (7), and circulation entry (6) run through oil tank (1) bottom and first oil delivery pipe (8) are connected, and both ends are provided with first sealed lid (9) around first oil delivery pipe (8) simultaneously, first oil delivery pipe (8) and second oil delivery pipe (10) all are provided with three group, and first oil delivery pipe (8) and second oil delivery pipe (10) are perpendicular, second oil delivery pipe (10) are connected with two and are connected with second oil delivery pipe (10) top end (12), and the outside of the second oil delivery pipe (10) is provided with a cooling fan (13), the circulating outlet (11) penetrates through the oil tank (1) and is arranged at the rear side of the top of the winding (4), and a second control valve (14) is arranged in the circulating outlet (11).
2. The oil immersed transformer convenient for cleaning an oil passage according to claim 1, wherein: the circulating inlet (6), the first control valve (7), the circulating outlet (11) and the second control valve (14) are all provided with three groups, and the inner diameter of the circulating inlet (6) is consistent with the inner diameter of the circulating outlet (11).
3. The oil immersed transformer convenient for cleaning an oil passage according to claim 1, wherein: the first sealing cover (9) is connected with the first oil delivery pipe (8) in a threaded mode.
4. The oil immersed transformer convenient for cleaning an oil passage according to claim 1, wherein: the cooling fans (13) are provided with three groups, and each group of cooling fans (13) is provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599692.9A CN110265208B (en) | 2019-07-04 | 2019-07-04 | Oil immersed transformer convenient to clearance oil duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910599692.9A CN110265208B (en) | 2019-07-04 | 2019-07-04 | Oil immersed transformer convenient to clearance oil duct |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110265208A CN110265208A (en) | 2019-09-20 |
| CN110265208B true CN110265208B (en) | 2024-04-19 |
Family
ID=67924422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910599692.9A Active CN110265208B (en) | 2019-07-04 | 2019-07-04 | Oil immersed transformer convenient to clearance oil duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110265208B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116705464B (en) * | 2023-06-27 | 2024-02-13 | 沈阳中天电力电气设备有限公司 | Single-phase 1000Hz transformer |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051137A (en) * | 2014-07-02 | 2014-09-17 | 杭州务实科技有限公司 | Transformer having the fast cooling function |
| CN105225795A (en) * | 2015-10-19 | 2016-01-06 | 成都九十度工业产品设计有限公司 | A kind of buried oil cooling system of oil-filled transformer |
| CN105390238A (en) * | 2015-12-18 | 2016-03-09 | 无锡博利达换热器有限公司 | Oil cooler for oil type transformers |
| CN205406247U (en) * | 2016-03-17 | 2016-07-27 | 温州凯唐电子科技有限公司 | Oil -immersed transformer's scrubbing structure |
| CN205542283U (en) * | 2016-01-21 | 2016-08-31 | 北京建筑大学 | Be applied to energy -conserving oily formula three -phase transformer of voltage of transformation |
| CN107424757A (en) * | 2017-05-15 | 2017-12-01 | 天晟电气股份有限公司 | A kind of environmentally friendly oil-filled transformer |
| CN206758223U (en) * | 2017-05-16 | 2017-12-15 | 郑州三彩电子科技有限公司 | Oil-filled transformer and transformation system |
| CN206921623U (en) * | 2017-04-29 | 2018-01-23 | 太仓市友达电气技术有限公司 | A kind of oil immersed type self-cleaning transformer |
| CN207009226U (en) * | 2017-05-15 | 2018-02-13 | 天晟电气股份有限公司 | A kind of decontamination mechanism for oil-filled transformer |
| CN207068601U (en) * | 2017-05-15 | 2018-03-02 | 天晟电气股份有限公司 | A kind of device for transformer for purifying fluid |
| CN108735453A (en) * | 2018-05-17 | 2018-11-02 | 南京溧水得瑞微型电机厂 | A kind of oil-immersed transformer cooling device |
| CN208688758U (en) * | 2018-09-21 | 2019-04-02 | 国网福建省电力有限公司检修分公司 | The tightness checking device of capsule type oil storage cabinet |
| CN109872865A (en) * | 2019-03-22 | 2019-06-11 | 南通鑫源电器制造有限公司 | A kind of complete oil-filled closed type amorphous alloy oil immersion type transformer |
| CN209947605U (en) * | 2019-07-04 | 2020-01-14 | 江苏恒屹变压器有限公司 | Oil-immersed transformer convenient to clearance oil duct |
-
2019
- 2019-07-04 CN CN201910599692.9A patent/CN110265208B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051137A (en) * | 2014-07-02 | 2014-09-17 | 杭州务实科技有限公司 | Transformer having the fast cooling function |
| CN105225795A (en) * | 2015-10-19 | 2016-01-06 | 成都九十度工业产品设计有限公司 | A kind of buried oil cooling system of oil-filled transformer |
| CN105390238A (en) * | 2015-12-18 | 2016-03-09 | 无锡博利达换热器有限公司 | Oil cooler for oil type transformers |
| CN205542283U (en) * | 2016-01-21 | 2016-08-31 | 北京建筑大学 | Be applied to energy -conserving oily formula three -phase transformer of voltage of transformation |
| CN205406247U (en) * | 2016-03-17 | 2016-07-27 | 温州凯唐电子科技有限公司 | Oil -immersed transformer's scrubbing structure |
| CN206921623U (en) * | 2017-04-29 | 2018-01-23 | 太仓市友达电气技术有限公司 | A kind of oil immersed type self-cleaning transformer |
| CN207068601U (en) * | 2017-05-15 | 2018-03-02 | 天晟电气股份有限公司 | A kind of device for transformer for purifying fluid |
| CN207009226U (en) * | 2017-05-15 | 2018-02-13 | 天晟电气股份有限公司 | A kind of decontamination mechanism for oil-filled transformer |
| CN107424757A (en) * | 2017-05-15 | 2017-12-01 | 天晟电气股份有限公司 | A kind of environmentally friendly oil-filled transformer |
| CN206758223U (en) * | 2017-05-16 | 2017-12-15 | 郑州三彩电子科技有限公司 | Oil-filled transformer and transformation system |
| CN108735453A (en) * | 2018-05-17 | 2018-11-02 | 南京溧水得瑞微型电机厂 | A kind of oil-immersed transformer cooling device |
| CN208688758U (en) * | 2018-09-21 | 2019-04-02 | 国网福建省电力有限公司检修分公司 | The tightness checking device of capsule type oil storage cabinet |
| CN109872865A (en) * | 2019-03-22 | 2019-06-11 | 南通鑫源电器制造有限公司 | A kind of complete oil-filled closed type amorphous alloy oil immersion type transformer |
| CN209947605U (en) * | 2019-07-04 | 2020-01-14 | 江苏恒屹变压器有限公司 | Oil-immersed transformer convenient to clearance oil duct |
Also Published As
| Publication number | Publication date |
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| CN110265208A (en) | 2019-09-20 |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 221000 Gushan village, Xuzhou, Jiangsu economic and Technological Development Zone Applicant after: Jiangsu Hengyi Transformer Co.,Ltd. Address before: 221000 Gushan village, Xuzhou, Jiangsu economic and Technological Development Zone Applicant before: JIANGSU HENGYI TRANSFORMER Co.,Ltd. |
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