Energy-saving oil-immersed transformer

Abstract

The utility model provides an energy-saving oil-immersed transformer, relates to the technical field of transformers, and solves the technical problems that an existing energy-saving transformer is low in cooling automation degree and consumes extra manpower and material resources. The heat exchanger comprises an oil tank, an iron core and a coil wound on the iron core, the iron core and the coil are provided with an insulating cylinder used for sealing, the insulating cylinder is provided with a plurality of sets of transverse fins used for exchanging heat with heat exchange oil, and the transverse fins are provided with transverse notches used for allowing the heat exchange oil to pass through in a staggered mode. According to the heat exchanger, the heat exchange fins with larger coverage area, namely the transverse fins and the vertical fins, are adopted to replace heat exchange tubes, so that the heat exchanger has larger heat exchange area; by arranging the staggered notches, the heat exchange area, namely the heat exchange flow, of the heat exchange oil is guaranteed, meanwhile, circulation obstruction can be reduced through the notches and the through holes, the flow rate of the heat exchange oil is accelerated through release, and the purpose of comprehensively improving the heat exchange efficiency of the transformer is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an energy-saving oil-immersed transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are coils and iron cores. Its main functions include voltage conversion, current conversion, impedance conversion, isolation and voltage stabilization. It can be divided into power transformers and special transformers according to its use.

[0003] With the continuous development of science and technology, electricity is used in all aspects of life. The large-scale use of electricity will lead to the paralysis of the power system. Therefore, transformers are needed to control the electricity to ensure that the electricity can be operated at a reasonable voltage. However, with the increase in the number of transformers used and the expansion of the scope of application, there is a situation of power consumption in the process of power conversion. Although the conversion efficiency of transformer power has reached more than 98%, due to the large amount of transformers used in the power system, the total power loss of the transformer is very considerable, so there is a disadvantage that the large-scale use of transformers will consume too much power, which is not in line with the concept of energy saving and power saving, and increases the burden on the power supply system, which is not conducive to long-term development and use. The actual working conversion efficiency of the transformer is different when the ambient temperature is different. The better working temperature is below 30 degrees. Too high a temperature will reduce the conversion efficiency of the transformer. When the temperature is 0 degrees, it can load 120% of the rated power; when the temperature is 50 degrees, the transformer can load 80% of the rated power.

[0004] Therefore, as the patent with publication number CN213460805U proposes, an energy-saving combined box-type transformer has a dry ice placement device inside the package, which stores dry ice and reacts to cool the inner liner. The inner liner and the package are connected by a shock-absorbing device, which increases the shock-absorbing effect of the cold-keeping bag. When the items need to be cooled, the ventilation device is turned on and a fan is used to blow the carbon dioxide generated by the dry ice out of the package to cool the inner liner. When cooling is not required, the sliding baffle blocks the air outlet to prevent air flow and keep the inner liner cold. The device controls the temperature of the transformer through cooling, improves the transformer conversion efficiency, and reduces power loss. However, for the working condition of the transformer, it is necessary to work outdoors for a long time. Dry ice will consume more due to environmental influences, and its replenishment also requires additional manpower and material resources. Utility Model Content

[0005] The utility model aims to provide an energy-saving oil-immersed transformer to solve the technical problems of low cooling automation of existing energy-saving transformers and consumption of extra manpower and material resources.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] An energy-saving oil-immersed transformer comprises an oil tank, an iron core and a coil wound around the iron core, the iron core and the coil are provided with an insulating cylinder for sealing, the insulating cylinder is provided with a plurality of groups of transverse fins for exchanging heat with heat exchange oil, and the transverse fins are provided with transverse notches for staggered passage of the heat exchange oil.

[0008] Preferably, the insulating cylinder is further provided with a plurality of groups of vertical fins for exchanging heat with the heat exchange oil, and the vertical fins are provided with vertical notches for staggered passage of the heat exchange oil.

[0009] Preferably, the vertical fins are provided with through holes for evacuating heat exchange oil.

[0010] Preferably, the insulating cylinder is further provided with a plurality of groups of longitudinal hoops for exchanging heat with the heat exchange oil and reinforcing the insulating cylinder.

[0011] Preferably, the insulating cylinder is provided with a thermometer for measuring its temperature.

[0012] Preferably, the iron core is respectively connected to a high-voltage sleeve rod for connecting a high-voltage line and a low-voltage sleeve rod for connecting a low-voltage line.

[0013] Preferably, the oil tank is also provided with an oil pipeline for conveying heat exchange oil and an oil drain valve for discharging the heat exchange oil, and the oil pipeline and the oil drain valve are connected to an external circulation refrigeration device.

[0014] Preferably, the oil tank is also provided with a base for supporting the tank body and a safety airway for exhaust.

[0015] By adopting the technical solution, heat exchange fins with a larger coverage area, that is, transverse fins and vertical fins are used instead of heat exchange tubes, so that it has a larger heat exchange area. At the same time, by arranging staggered notches, while ensuring the heat exchange area of ​​the heat exchange oil, that is, the heat exchange process, the flow obstacles can be reduced through the notches and through holes, the flow rate of the heat exchange oil can be released and accelerated, the heat exchange efficiency of the oil-immersed transformer is comprehensively improved, the conversion efficiency of the transformer at high temperature is improved, and the effect of energy saving and electricity saving is achieved.

[0016] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0017] 1. The utility model adopts heat exchange fins with a larger coverage area, that is, horizontal fins and vertical fins replace heat exchange pipes, so that it has a larger heat exchange area;

[0018] 2. The utility model provides staggered notches to ensure the heat exchange area of ​​the heat exchange oil, that is, the heat exchange flow, while reducing the obstruction of the flow through the notches and through holes, thereby releasing and accelerating the flow rate of the heat exchange oil;

[0019] 3. The utility model achieves the purpose of comprehensively improving the heat exchange efficiency of the transformer by expanding the heat exchange area and heat exchange oil of the transformer and improving the process and flow rate of the heat exchange oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the front structure of an energy-saving oil-immersed transformer provided in Example 1 of the utility model;

[0022] Figure 2 A front cross-sectional schematic diagram of an energy-saving oil-immersed transformer provided in Example 1 of the utility model;

[0023] Figure 3 A schematic diagram of the side cross-sectional structure of an energy-saving oil-immersed transformer provided in Example 2 of the utility model;

[0024] Icons: 1. Oil tank; 11. Oil drain valve; 12. Base; 13. Safety airway; 14. Thermometer; 15. Oil pipeline; 21. High-pressure sleeve rod; 22. Low-pressure sleeve rod; 3. Insulating tube; 4. Horizontal fin; 41. Horizontal notch; 5. Vertical fin; 51. Vertical notch; 52. Through hole; 6. Iron core; 61. Coil; 7. Longitudinal hoop. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] An energy-saving oil-immersed transformer comprises an oil tank 1, an iron core 6 and a coil 61 wound around the iron core 6, the iron core 6 and the coil 61 are provided with an insulating cylinder 3 for sealing, the insulating cylinder 3 is provided with a plurality of groups of transverse fins 4 for exchanging heat with heat exchange oil, and the transverse fins 4 are provided with transverse notches 41 for staggered passage of the heat exchange oil.

[0032] In this embodiment, the insulating cylinder 3 is further provided with a plurality of groups of vertical fins 5 for exchanging heat with the heat exchange oil. The vertical fins 5 are provided with vertical notches 51 for staggered passage of the heat exchange oil.

[0033] In this embodiment, the vertical fins 5 are provided with through holes 52 for evacuating heat exchange oil.

[0034] In this embodiment, the insulating cylinder 3 is provided with a thermometer 14 for measuring the temperature thereof.

[0035] In this embodiment, the iron core 6 is respectively connected to a high voltage sleeve rod 21 for connecting a high voltage line and a low voltage sleeve rod 22 for connecting a low voltage line.

[0036] In this embodiment, the oil tank 1 is further provided with an oil delivery pipe 15 for delivering heat exchange oil and an oil drain valve 11 for discharging the heat exchange oil. The oil delivery pipe 15 and the oil drain valve 11 are connected to an external circulation refrigeration device.

[0037] In this embodiment, the oil tank 1 is further provided with a base 12 for supporting the tank body and a safety airway 13 for exhausting air.

[0038] Working principle and usage:

[0039] By adopting the technical solution, heat exchange fins with a larger coverage area, that is, transverse fins 4 and vertical fins 5 are used to replace heat pipes, so that it has a larger heat exchange area. At the same time, by setting staggered notches, while ensuring the heat exchange area of ​​the heat exchange oil, that is, the heat exchange process, the notches and through holes 52 can reduce the obstruction of the flow, release and accelerate the flow rate of the heat exchange oil, comprehensively improve the heat exchange efficiency of the oil-immersed transformer, improve the conversion efficiency of the transformer at high temperature, and achieve the effect of energy saving and electricity saving.

[0040] Example 2

[0041] The only difference between this embodiment and the first embodiment is that, in this embodiment, the insulating tube 3 is further provided with a plurality of groups of longitudinal hoop sheets 7 for exchanging heat with the heat exchange oil and reinforcing the insulating tube 3 .

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving oil-immersed transformer, comprising an oil tank (1), an iron core (6) and a coil (61) wound around the iron core (6), characterized in that: The iron core (6) and the coil (61) are provided with an insulating cylinder (3) for sealing, the insulating cylinder (3) is provided with a plurality of groups of transverse fins (4) for exchanging heat with heat exchange oil, and the transverse fins (4) are provided with transverse notches (41) for staggered passage of the heat exchange oil.

2. The energy-saving oil-immersed transformer according to claim 1, characterized in that: The insulating cylinder (3) is also provided with a plurality of groups of vertical fins (5) for exchanging heat with the heat exchange oil. The vertical fins (5) are provided with vertical notches (51) for staggered passage of the heat exchange oil.

3. An energy-saving oil-immersed transformer according to claim 2, characterized in that: The vertical fins (5) are provided with through holes (52) for evacuating heat exchange oil.

4. An energy-saving oil-immersed transformer according to any one of claims 1 to 3, characterized in that: The insulating cylinder (3) is also provided with a plurality of groups of longitudinal hoop sheets (7) for exchanging heat with the heat exchange oil and reinforcing the insulating cylinder (3).

5. An energy-saving oil-immersed transformer according to any one of claims 1 to 3, characterized in that: The insulating cylinder (3) is provided with a thermometer (14) for measuring its temperature.

6. An energy-saving oil-immersed transformer according to any one of claims 1 to 3, characterized in that: The iron core (6) is respectively connected to a high-voltage sleeve rod (21) for connecting a high-voltage line and a low-voltage sleeve rod (22) for connecting a low-voltage line.

7. An energy-saving oil-immersed transformer according to any one of claims 1 to 3, characterized in that: The oil tank (1) is also provided with an oil delivery pipe (15) for delivering heat exchange oil and an oil drain valve (11) for discharging the heat exchange oil. The oil delivery pipe (15) and the oil drain valve (11) are connected to an external circulation refrigeration device.

8. An energy-saving oil-immersed transformer according to any one of claims 1 to 3, characterized in that: The oil tank (1) is also provided with a base (12) for supporting the tank body and a safety airway (13) for exhausting air.

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