CN210805446U - Oil-immersed power transformer - Google Patents
Oil-immersed power transformer Download PDFInfo
- Publication number
- CN210805446U CN210805446U CN201921877401.XU CN201921877401U CN210805446U CN 210805446 U CN210805446 U CN 210805446U CN 201921877401 U CN201921877401 U CN 201921877401U CN 210805446 U CN210805446 U CN 210805446U
- Authority
- CN
- China
- Prior art keywords
- oil
- radiator
- power transformer
- oil tank
- semiconductor refrigerating
- 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.)
- Active
Links
Images
Abstract
The utility model discloses an oil-immersed power transformer, which comprises an oil tank, a high-voltage sleeve and a low-voltage sleeve, wherein the high-voltage sleeve and the low-voltage sleeve are arranged on the oil tank; the device also comprises a semiconductor refrigerating sheet, a radiator, a temperature sensor and a control box; the semiconductor refrigerating pieces are arranged on two opposite long side surfaces of each radiating pipe, the refrigerating surfaces of the semiconductor refrigerating pieces are attached to the corresponding long side surfaces, and the radiating surfaces of the semiconductor refrigerating pieces are attached to the radiator; the temperature sensor is installed in the oil tank and contacts with transformer oil, the control box is fixed on the upper surface of the oil tank, and the control box is respectively and electrically connected with the temperature sensor and all the semiconductor refrigeration pieces. The utility model provides the high heat-sinking capability of oil tank reduces the fault rate under high temperature environment.
Description
Technical Field
The utility model relates to a transformer technical field, concretely relates to oil-immersed power transformer.
Background
The heat dissipation principle of the oil-immersed power transformer is as follows: the core and coil transfer heat first to the oil in its vicinity, raising the temperature of the oil. The oil with high temperature increases in volume and decreases in specific gravity, and moves to the upper part of the oil tank. The cold oil replenishes the natural motion to the original position of the hot oil. The hot oil emits heat along the wall or the radiator pipe, is taken away by surrounding air through the wall or the pipe wall, and returns to the lower part of the oil tank to take part in circulation after the temperature is reduced. Thus, because of the difference of oil temperature, natural circulation flow of oil is generated, and heat dissipation can be realized without other cooling devices, so the oil-immersed power transformer is also called an oil-immersed self-cooling transformer.
The oil-immersed power transformer depends on radiation of the wall of the oil tank and natural convection of air around the transformer, so that heat is taken away from the surface of the oil tank. In order to increase the heat dissipation surface of the transformer, the wall of the oil tank is made into a wave shape, and a pipe is welded on the wall of the oil tank to promote the convection of oil.
However, the heat dissipation efficiency of the oil-immersed power transformer is actually closely related to the temperature of the surrounding environment, and if the temperature of the surrounding environment is high, such as in the midsummer, the heat dissipation is poor, so that the oil temperature is high after a long time, the temperatures of the iron core and the coil rise, and finally, the insulating varnish of the coil is damaged and short-circuited and burnt. Therefore, the oil-immersed power transformer has a problem that the self-cooling effect is poor and the oil-immersed power transformer cannot be kept normal when the ambient temperature is high.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides an oil-immersed power transformer to improve the heat-sinking capability of oil tank, reduce the fault rate under high temperature environment.
The utility model provides an oil-immersed power transformer, which comprises an oil tank, a high-voltage sleeve and a low-voltage sleeve, wherein the high-voltage sleeve and the low-voltage sleeve are arranged on the oil tank;
the device also comprises a semiconductor refrigerating sheet, a radiator, a temperature sensor and a control box; the semiconductor refrigerating pieces are arranged on two opposite long side surfaces of each radiating pipe, the refrigerating surfaces of the semiconductor refrigerating pieces are attached to the corresponding long side surfaces, and the radiating surfaces of the semiconductor refrigerating pieces are attached to the radiator; the temperature sensor is installed in the oil tank and contacts with transformer oil, the control box is fixed on the upper surface of the oil tank, and the control box is respectively and electrically connected with the temperature sensor and all the semiconductor refrigeration pieces.
The beneficial effects of the utility model are embodied in:
real-time oil temperature is monitored through the temperature sensor, the temperature of the oil tank in the working process rises and can not fall according to the self-cooling mode, when the oil temperature is higher than the set temperature of the control box, the control box enables all semiconductor refrigeration pieces to work, the refrigeration surface rapidly cools two long side surfaces of each radiating pipe, and the oil temperature is guaranteed not to exceed the highest temperature that the iron core and the coil can bear. When the oil temperature is lower than the set temperature, the control box stops all the semiconductor refrigerating sheets, so that the oil temperature is controlled at the set temperature value, and the normal work of the transformer is ensured.
Preferably, each cooling surface is adhered to the corresponding radiator and each cooling surface is adhered to the corresponding long side surface through heat-conducting silica gel.
The heat-conducting silica gel plays a role in adhesion and fixation, and meanwhile, heat transfer between the semiconductor refrigeration piece and the long side face and the radiator is enhanced.
Preferably, each semiconductor refrigeration piece is rectangular, and the area of the heat dissipation surface of each semiconductor refrigeration piece is smaller than that of the binding surface of the radiator.
The binding surface of the radiator completely covers and exceeds the radiating surface of the semiconductor refrigerating sheet, so that each part of the radiating surface can be fully contacted with the radiator, and the radiating efficiency is improved.
Preferably, every radiator all is equipped with adiabatic frame with the long curb surface that corresponds, and adiabatic frame wraps up corresponding semiconductor refrigeration piece lateral wall all around.
The material of heat insulating frame chooses thermal-insulated foam for use, and heat transfer between cooling surface and the refrigeration face has been blocked to heat insulating frame, is favorable to improving the temperature difference on two sides to improve the refrigeration effect of refrigeration face.
Preferably, the radiator is an aluminum radiating fin, and the aluminum radiating fin is provided with a plurality of radiating strips at equal intervals.
The heat dissipation strip increases the contact area of the aluminum heat dissipation sheet and air, and further improves the heat dissipation efficiency of the heat dissipation surface.
Preferably, the control box is provided with an audible and visual alarm.
When the electric load is overloaded, the oil temperature continuously rises and cannot be cooled through the semiconductor refrigerating sheet, and the audible and visual alarm is triggered when the oil temperature is higher than the set maximum temperature, so that maintenance personnel are reminded to process in time.
Preferably, the electric control box further comprises an electric distribution box electrically connected with the control box.
Because the direct current that semiconductor refrigeration piece adopted, the control box is the PLC controller, and both the working power supply of both all is the direct current, turns into the direct current with the alternating current through the block terminal, provides stable power.
Preferably, the plurality of radiating pipes on four sides of the oil tank are arranged at equal intervals.
Preferably, a tubular oil level indicator is arranged on the oil tank.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a right side view of FIG. 1;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the attached drawings, an oil tank 1, a tubular oil level indicator 2, a high-voltage sleeve 3, a low-voltage sleeve 4, a radiating pipe 5, a semiconductor refrigerating sheet 6, a radiator 7, a control box 8, a radiating strip 9, a heat insulation frame 10, an audible and visual alarm 11 and a distribution box 12.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
As shown in fig. 1 and 2, the present embodiment provides an oil-immersed power transformer, which includes an oil tank 1, and a tubular oil level indicator 2, a high voltage bushing 3 and a low voltage bushing 4 mounted on the oil tank 1, wherein a plurality of heat dissipation pipes 5 are arranged on four sides of the oil tank 1, and each heat dissipation pipe 5 is communicated with an inner cavity of the oil tank 1, wherein the number of heat dissipation pipes 5 on the front side and the rear side of the oil tank 1 is greater than the number of heat dissipation pipes 5 on the left side and the right side, the number of specific heat dissipation pipes 5 is determined according to the area of the sides, but the plurality of heat dissipation pipes 5 on the four sides of the oil.
In order to work normally in a higher temperature environment, the oil temperature is controlled by the following structure:
the equipment also comprises a semiconductor refrigerating sheet 6, a radiator 7, a temperature sensor and a control box 8. The shape of cooling tube 5 is rectangular shape, consequently every two relative long avris faces of cooling tube 5 all are equipped with semiconductor refrigeration piece 6, the area of long avris face is the biggest, and heat transfer efficiency is the highest, selects long avris face to be favorable to improving the radiating rate. The refrigerating surface of each semiconductor refrigerating sheet 6 is attached to the corresponding long side surface, and the radiating surface of each semiconductor refrigerating sheet 6 is attached to the radiator 7. The shapes of the semiconductor refrigerating sheet 6 and the radiator 7 are rectangular and are matched with the side surface of the long side, and the area of the radiating surface of the semiconductor refrigerating sheet 6 is smaller than that of the binding surface of the radiator 7. The binding surface of the radiator 7 completely covers and exceeds the radiating surface of the semiconductor refrigerating sheet 6, so that each part of the radiating surface can be fully contacted with the radiator 7, and the radiating efficiency is improved. Every all through the adhesion of heat conduction silica gel between every radiator 7 and every refrigeration face and the long avris face that corresponds. The heat-conducting silica gel plays a role in adhesion and fixation, and meanwhile, heat transfer between the semiconductor refrigerating sheet 6 and the long side surface and the radiator 7 is enhanced. And the heat sink 7 is an aluminum heat sink provided with a plurality of equally spaced heat sink bars 9. The radiating strip 9 increases the contact area of the aluminum radiating fin and air, and further improves the radiating efficiency of the radiating surface.
Because the distance of the cooling surface and the refrigerating surface of the semiconductor refrigerating sheet 6 is close, in order to avoid the mutual series of heat between the cooling surface and the semiconductor refrigerating sheet, the side surface of each radiator 7 and the corresponding long side is provided with a heat insulation frame 10, and the heat insulation frame 10 wraps the side wall of the periphery of the corresponding semiconductor refrigerating sheet 6. The material of the heat insulation frame 10 is heat insulation foam, and the heat transmission between the radiating surface and the refrigerating surface is blocked by the heat insulation frame 10, so that the temperature difference between the two surfaces is favorably improved, and the refrigerating effect of the refrigerating surface is improved.
The temperature sensor in the embodiment is arranged in the oil tank 1 and is in contact with transformer oil, the temperature sensor is specifically arranged at the upper part of the inner cavity of the oil tank 1, and the temperature measured by the temperature sensor is the highest temperature according to the reason that the hot oil moves upwards, so that the accurate temperature value can be fed back. The control box 8 is fixed on the oil tank 1, and the control box 8 is electrically connected with the temperature sensor and all the semiconductor refrigeration sheets 6 respectively. In addition, the control box 8 is provided with an audible and visual alarm 11. When the electric load is overloaded, the oil temperature continuously rises and cannot be cooled through the semiconductor refrigerating sheet 6, and the audible and visual alarm 11 is triggered when the oil temperature is higher than the set maximum temperature, so that maintenance personnel are reminded to process in time. And a distribution box 12 is also arranged on the oil tank 1, and the distribution box 12 is electrically connected with the control box 8. Because the semiconductor refrigeration piece 6 adopts the direct current, control box 8 is the PLC controller, and the working power supply of both is the direct current, turns into the direct current with the alternating current through block terminal 12, provides stable power.
The principle of the equipment for realizing cooling of the oil temperature at a higher temperature is as follows: the semiconductor refrigerating sheet 6 is powered by DC power supply to provide energy for electron flow, and after the power supply is turned on, the electron cathode starts to pass through the P-type semiconductor, and the heat absorbed by the P-type semiconductor is transferred to the N-type semiconductor to release heat. The highest temperature of the radiating surface of the semiconductor refrigerating sheet 6 can reach 65 ℃, even if the natural ambient temperature in summer can not reach 65 ℃, the semiconductor refrigerating sheet 6 can keep an efficient refrigerating effect under the general condition, the oil temperature is guaranteed not to be higher than the set temperature, and the problem that the oil temperature cannot be reduced in a self-cooling mode due to the fact that the ambient temperature is high is solved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. An oil-immersed power transformer comprises an oil tank, a high-voltage sleeve and a low-voltage sleeve, wherein the high-voltage sleeve and the low-voltage sleeve are arranged on the oil tank;
the method is characterized in that: the device also comprises a semiconductor refrigerating sheet, a radiator, a temperature sensor and a control box; the semiconductor refrigerating pieces are arranged on two opposite long side surfaces of each radiating pipe, the refrigerating surfaces of the semiconductor refrigerating pieces are attached to the corresponding long side surfaces, and the radiating surfaces of the semiconductor refrigerating pieces are attached to the radiator; the temperature sensor is installed in the oil tank and contacts with transformer oil, the control box is fixed on the upper surface of the oil tank, and the control box is respectively and electrically connected with the temperature sensor and all the semiconductor refrigeration pieces.
2. Oil filled power transformer according to claim 1, characterized in that: every all through the adhesion of heat conduction silica gel between every cooling face and the long avris face that corresponds between every radiator and the radiator that corresponds.
3. Oil filled power transformer according to claim 1, characterized in that: each semiconductor refrigerating piece is rectangular, and the area of the radiating surface of each semiconductor refrigerating piece is smaller than that of the binding surface of the radiator.
4. Oil filled power transformer according to claim 3, characterized in that: every radiator all is equipped with adiabatic frame with the long avris face that corresponds, and adiabatic frame wraps up the semiconductor refrigeration piece lateral wall all around that corresponds.
5. Oil filled power transformer according to claim 1, characterized in that: the radiator is an aluminum radiating fin which is provided with a plurality of radiating strips at equal intervals.
6. Oil filled power transformer according to claim 1, characterized in that: the control box is provided with an audible and visual alarm.
7. Oil filled power transformer according to claim 1, characterized in that: the power distribution box is electrically connected with the control box.
8. Oil filled power transformer according to claim 1, characterized in that: the radiating pipes on the four side surfaces of the oil tank are arranged at equal intervals.
9. Oil filled power transformer according to claim 1, characterized in that: and a tubular oil level indicator is arranged on the oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877401.XU CN210805446U (en) | 2019-11-02 | 2019-11-02 | Oil-immersed power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921877401.XU CN210805446U (en) | 2019-11-02 | 2019-11-02 | Oil-immersed power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210805446U true CN210805446U (en) | 2020-06-19 |
Family
ID=71226160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921877401.XU Active CN210805446U (en) | 2019-11-02 | 2019-11-02 | Oil-immersed power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210805446U (en) |
-
2019
- 2019-11-02 CN CN201921877401.XU patent/CN210805446U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017197842A1 (en) | Intelligent heat energy recycling apparatus and air-conditioning system | |
| CN212366615U (en) | Intelligent heat dissipation device | |
| KR101086338B1 (en) | Direct Cooling Device for Oil Filled Transformer using Thermoelectric Element | |
| CN103474202B (en) | A kind of transformer burn-out-proof protective device and using method | |
| CN102299614A (en) | Semiconductor-refrigeration-based inverter radiating system | |
| CN202961526U (en) | Semiconductor cooling device of transcranial magnetic stimulation coil | |
| CN210805446U (en) | Oil-immersed power transformer | |
| CN109612152A (en) | Thermoelectric cooling, heating unitary members | |
| CN202727925U (en) | Self-cooling circulating system for vehicle-mounted ice melting device | |
| CN210896901U (en) | Oil-immersed transformer with heat dissipation function | |
| CN109672008A (en) | Battery modules with thermoelectric cooling, heating unitary members | |
| CN213635614U (en) | Heat exchange efficient heat dissipation type transformer | |
| CN212724984U (en) | High-voltage transformer with lightning protection safety | |
| CN212462565U (en) | Transformer substation protection device management and control equipment | |
| CN202261069U (en) | Inverter cooling system based on semiconductor refrigeration | |
| CN211788524U (en) | E-type distribution transformer with temperature control function | |
| CN212570642U (en) | Transformer with good heat dissipation performance in high-temperature environment | |
| CN208111245U (en) | A kind of novel oil-immersed transformer | |
| CN209329095U (en) | Battery modules with thermoelectric cooler coldplate | |
| CN209449127U (en) | A kind of high frequency electric source radiator | |
| KR101086339B1 (en) | Cooling Device for Oil Filled Transformer using Thermoelectric Element | |
| CN201852193U (en) | Intelligent convection type electric heater | |
| CN110739124A (en) | transformer with high-efficiency cooling function | |
| CN217035349U (en) | Oil-immersed transformer | |
| CN205140683U (en) | Transformer with excellent thermal diffusivity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 317300 Baita Industrial Cluster, Xianju County, Taizhou City, Zhejiang Province Patentee after: Huaxia Hengye Intelligent Electric Co.,Ltd. Address before: 317300 Baita Industrial Cluster, Xianju County, Taizhou City, Zhejiang Province Patentee before: HUAXIA HENGYE TRANSFORMER CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |