Oil-immersed transformer with high heat dissipation and convenient oil replacement

Abstract

The application discloses a kind of oil-immersed transformers of high efficiency heat dissipation convenient to change oil, it is related to oil-immersed transformer technical field, specifically including first protective box, transformer is installed in the first protective box, the front surface, rear surface and left surface of first protective box are all fixedly connected with second protective box, multiple heat dissipation fin plates are symmetrically installed in the second protective box, positioning slot is formed in the heat dissipation fin plate, evaporation pipe is installed in the positioning slot, the evaporation pipe is S type design, circulation pipe is arranged between adjacent second protective box, adjacent evaporation pipe is connected by circulation pipe;The right surface of first protective box is fixedly connected with heat dissipation box body.The application when using, ensure that oil temperature is constant, improve the heat dissipation efficiency, convenient to oil replacement, supplement work simultaneously.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer with efficient heat dissipation and convenient oil replacement. BACKGROUND

[0002] With the increasing demand for industrial and civilian electricity, oil-immersed transformers are also rapidly developing. Oil-immersed transformers use oil as the main insulation means and rely on oil as the cooling medium. They mainly adopt three cooling methods: oil-immersed self-cooling, oil-immersed air-cooling, and forced oil circulation. Oil-immersed transformers are a new type of high-performance transformer with reasonable structure and excellent performance, commonly used in power plants, petrochemical enterprises, and large enterprises.

[0003] When the oil-immersed transformer is running, the internal insulation oil temperature continuously rises due to the existence of iron loss and copper loss. To avoid the accumulation of heat damaging the transformer coil and iron core, the heat needs to be quickly discharged from the inside of the box. The existing method is to install heat dissipation fins on the box to dissipate heat to the air. However, this single structure of heat dissipation has very limited efficiency, and the oil cooling speed is slow. When the oil needs to be replaced due to deterioration, the replacement process is cumbersome, time-consuming, and labor-intensive. SUMMARY

[0004] To address the low heat dissipation efficiency, slow oil cooling speed, and inconvenience of oil replacement of existing oil-immersed transformers, the present application provides an oil-immersed transformer with efficient heat dissipation and convenient oil replacement, which has the advantages of high heat dissipation efficiency, fast oil cooling speed, and convenient oil replacement, solving the problems raised in the background technology.

[0005] To achieve the above purpose, the present application realizes the following technical solutions:

[0006] An oil-immersed transformer with efficient heat dissipation and convenient oil replacement is designed, which includes a first protective box. The first protective box is internally installed with a transformer. The front surface, rear surface, and left surface of the first protective box are fixedly connected with a second protective box. The second protective box is internally installed with multiple heat dissipation fins symmetrically. The heat dissipation fins are internally provided with positioning grooves. The positioning grooves are internally installed with evaporation pipes. The evaporation pipes are designed in an S shape. Adjacent second protective boxes are provided with circulation pipes. Adjacent evaporation pipes are connected through the circulation pipes.

[0007] The right surface of the first protective box is fixedly connected with a heat dissipation box. The heat dissipation box is internally installed with two partitions symmetrically. The partitions divide the internal space of the heat dissipation box into a first cavity and a second cavity. The first cavity is internally installed with a condenser. The second cavity is internally installed with a compressor, a gas-liquid separator, a liquid storage tank, and an expansion valve, respectively.

[0008] One end of the circulating pipe is connected with the gas-liquid separator through the heat dissipation box, the gas-liquid separator is connected with the compressor through a pipeline, the compressor is connected with the condenser through a pipeline, the condenser is connected with the liquid storage tank through a pipeline, the liquid storage tank is connected with the expansion valve through a pipeline, the other end of the circulating pipe is connected with the expansion valve through the heat dissipation box, the first cavity is provided with an air inlet at the bottom, and a blowing fan is arranged in the air inlet.

[0009] Optionally, the transformer comprises a core, a coil is arranged on a core column of the core, and the coil is fixedly installed in the first protective box;

[0010] A sealing top cover corresponding to the first protective box is arranged above the first protective box, a connecting portion is arranged at the bottom edge of the sealing top cover and the top edge of the first protective box, the connecting portions are connected through bolts, a connecting column head corresponding to the coil is arranged on the top of the sealing top cover, the bottom end of the connecting column head is connected with the coil through a wire, and a plurality of insulators are symmetrically arranged on the outer side of the top end of the connecting column head.

[0011] Optionally, a mounting bracket is fixedly connected to the top of one side of the sealing top cover, an oil pillow is fixedly installed on the top of one side of the mounting bracket, an oil inlet is arranged on the top of the oil pillow, a safety air duct is connected to the bottom of the oil pillow, a gas relay is arranged on the safety air duct, and the bottom end of the safety air duct is connected with the sealing top cover.

[0012] An oil discharge port is arranged at the bottom of one side of the first protective box, an electromagnetic valve is arranged in the oil discharge port and the oil inlet, and an oil level detection meter is fixedly installed on the inner wall of the first protective box.

[0013] Optionally, triangular plates are fixedly connected to the bottoms of the two sides of the heat dissipation box, a dust filter screen is arranged between the triangular plates, the dust filter screen is arranged below the bottom of the air inlet, and the dust filter screen is connected with the triangular plates on the two sides.

[0014] Optionally, a rain baffle is arranged on the bottom of the side of the heat dissipation box away from the first protective box, the rain baffle is connected with the heat dissipation box, an air exhaust pipe is connected with the top of the heat dissipation box, and the air exhaust pipe is connected with the outside.

[0015] Optionally, a maintenance cover plate is arranged at the port of the side of the second protective box away from the first protective box, and the maintenance cover plate is connected with the second protective box through bolts.

[0016] Optionally, a plurality of mounting bases are symmetrically arranged at the bottom of the first protective box, the mounting bases are designed in a U shape, a plurality of mounting holes are arranged at the bottom of the mounting base, and the mounting holes are equidistantly distributed along the length direction of the mounting base.

[0017] Optionally, the circulating pipe is provided with a mounting shell corresponding to the shape of the circulating pipe, and the mounting shell is connected with the first protective box and the second protective box by bolts respectively.

[0018] Compared with the prior art, in use, the heat generated in the operation of the transformer is first absorbed by the oil, and then the heat of the oil is sequentially introduced into the circulating process of the cooling liquid in the evaporation pipe through the first protective box and the heat dissipation fin, the cooling liquid absorbs and carries away the heat along the way, and then the cooling liquid is reheated after passing through the gas-liquid separator, the compressor, the liquid storage tank and the expansion valve, and then returns to the evaporation pipe, thereby ensuring the constant temperature of the oil and improving the heat dissipation efficiency. At the same time, the oil level detector can be used to monitor the oil level in real time, and the oil inlet and the oil outlet can be used to facilitate the replacement and supplement of the oil. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present application.

[0020] Figure 2 It is a structural schematic diagram of the first protective box of the present application.

[0021] Figure 3 It is a structural schematic diagram of the second protective box of the present application.

[0022] Figure 4 It is a structural schematic diagram of the heat dissipation box of the present application.

[0023] In the figure: 1, first protective box; 2, sealing top cover; 3, connecting part; 4, expansion valve; 5, core; 6, coil; 7, dust filter; 8, air inlet; 9, air blowing fan; 10, gas relay; 11, condenser; 12, connecting stud; 13, insulator; 14, mounting base; 15, mounting hole; 16, mounting bracket; 17, oil pillow; 18, oil inlet; 19, safety airway; 20, oil level detector; 21, oil outlet; 22, second protective box; 23, maintenance cover plate; 24, heat dissipation fin; 25, positioning groove; 26, evaporation pipe; 27, circulating pipe; 28, heat dissipation box; 29, triangular plate; 30, rain shield; 31, exhaust pipe; 32, mounting shell; 33, partition; 34, first cavity; 35, second cavity; 36, compressor; 37, gas-liquid separator; 38, liquid storage tank. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] Referring to Figures 1 to 4 , the application provides a technical scheme: an oil-immersed transformer with high heat dissipation efficiency and convenient oil replacement, comprising a first protective box body 1.

[0026] As Figure 2 shown, the transformer is positioned and installed inside the first protective box body 1, and the first protective box body 1 is filled with insulating oil. The heat generated by the transformer due to the existence of iron loss and copper loss during operation is dissipated outward and absorbed by the oil.

[0027] The front surface, rear surface and left surface of the first protective box body 1 are fixedly connected with a second protective box body 22, and a plurality of heat dissipation fins 24 are symmetrically installed inside the second protective box body 22.

[0028] As Figure 3 shown, the oil conducts heat to the shell of the first protective box body 1, and then the heat dissipation fins 24 inside the second protective box body 22 absorb the heat on the first protective box body 1. In this way, the heat is quickly transferred from the inside of the first protective box body 1 to the outside, ensuring that the temperature of the oil inside the first protective box body 1 is constant.

[0029] Positioning grooves 25 are formed on the heat dissipation fins 24, and evaporation pipes 26 are installed in the positioning grooves 25. The evaporation pipes 26 are designed in an S shape. Adjacent second protective box bodies 22 are provided with circulation pipes 27, and adjacent evaporation pipes 26 are connected through the circulation pipes 27.

[0030] As shown in 2, Figure 3 , the heat of the heat dissipation fins 24 is absorbed by the liquid inside the evaporation pipes 26 along the way and quickly taken away, so that the heat dissipation fins 24 remain in a state of lower temperature and heat absorption. In this way, it is ensured that the heat inside the first protective box body 1 can be continuously dissipated to the outside.

[0031] The right surface of the first protective box body 1 is fixedly connected with a heat dissipation box body 28, and two partitions 33 are symmetrically installed inside the heat dissipation box body 28. The partitions 33 divide the space inside the heat dissipation box body 28 into a first cavity 34 and a second cavity 35. The first cavity 34 is installed with a condenser 11, and the second cavity 35 is installed with a compressor 36, a gas-liquid separator 37, a liquid storage tank 38 and an expansion valve 4.

[0032] As Figure 4 shown, the cooling components such as the compressor 36 and the gas-liquid separator 37 inside the first cavity 34 and the second cavity 35 can cool the heat-absorbed cooling liquid, so that it returns to the evaporation pipe 26 inside to continue to participate in the heat dissipation work in a low-temperature state.

[0033] One end of the circulation pipe 27 penetrates through the heat dissipation box 28 and is connected with the gas-liquid separator 37, the gas-liquid separator 37 is connected with the compressor 36 through a pipeline, the compressor 36 is connected with the condenser 11 through a pipeline, the condenser 11 is connected with the liquid storage tank 38 through a pipeline, the liquid storage tank 38 is connected with the expansion valve 4 through a pipeline, the other end of the circulation pipe 27 penetrates through the heat dissipation box 28 and is connected with the expansion valve 4, the first cavity 34 is provided with an air inlet 8 at the bottom, and the air inlet 8 is internally provided with a blowing fan 9.

[0034] As shown in Figure 3 , Figure 4 , the cooling liquid absorbs heat in the evaporation pipe 26, then passes through the gas-liquid separator 37, the compressor 36, and enters the condenser 11, the condenser 11 dissipates the heat of the cooling liquid, and then the cooling liquid in the low-temperature state passes through the liquid storage tank 38 and the expansion valve 4 to return to the evaporation pipe 26 to continue to absorb heat, so as to ensure that the heat dissipation work can be continuously and efficiently and steadily carried out.

[0035] Further, the transformer comprises a core 5, and the core 5 is provided with a coil 6 on the core column, and the coil 6 is fixedly installed in the first protective box 1.

[0036] The first protective box 1 is provided with a sealing top cover 2 corresponding thereto, the sealing top cover 2 is provided with a connecting portion 3 at the bottom edge and the first protective box 1 is provided with a connecting portion 3 at the top edge, the connecting portions 3 are connected by bolts, the sealing top cover 2 is provided with a connecting column head 12 corresponding to the coil 6 at the top, the connecting column head 12 is connected with the coil 6 through a lead wire at the bottom end, and a plurality of insulators 13 are symmetrically installed outside the top end of the connecting column head 12.

[0037] As shown in Figure 2 , the connecting column head 12 is arranged to connect the power supply and the load, and bear and distribute various stresses.

[0038] Further, the sealing top cover 2 is fixedly connected with a mounting bracket 16 at the top of one side, the mounting bracket 16 is fixedly installed with an oil pillow 17 at the top of one side, the oil pillow 17 is provided with an oil inlet 18 at the top, and the oil pillow 17 is connected with a safety air duct 19 at the bottom, the safety air duct 19 is installed with a gas relay 10, and the safety air duct 19 is connected with the sealing top cover 2 at the bottom end.

[0039] As shown in Figure 2 , the oil pillow 17 is arranged to create conditions for thermal expansion and contraction of oil, so that the oil in the first protective box 1 is full of oil in various operating states, and the heat dissipation effect is improved after the transformer is fully immersed in the oil.

[0040] The bottom side of the first protective housing 1 is provided with an oil drain port 21. Solenoid valves are installed inside the oil drain port 21 and the oil filling port 18. An oil level gauge 20 is fixedly installed on the top side of the inner wall of the first protective housing 1. By setting the oil level gauge 20, the staff can obtain the position of the oil inside the first protective housing 1 in real time, which facilitates the replenishment and replacement of the oil.

[0041] Furthermore, triangular plates 29 are fixedly connected to the bottom of both sides of the heat dissipation box 28, and a dust filter 7 is provided between the triangular plates 29. The dust filter 7 is located below the bottom of the air inlet 8 and is connected to the triangular plates 29 on both sides respectively.

[0042] like Figure 4 As shown, by setting a dust filter 7, when the fan 9 inside the air inlet 8 draws outside air into the first cavity 34, it prevents dust and other impurities mixed in with the drawn-in air from entering and damaging the condenser 11.

[0043] Furthermore, a rain shield 30 is inclinedly provided at the bottom of the side of the heat dissipation box 28 away from the first protective box 1. The top of the rain shield 30 is connected to the heat dissipation box 28, and an exhaust pipe 31 is connected to the top of the heat dissipation box 28. The exhaust pipe 31 is connected to the outside. By setting the rain shield 30 and the exhaust pipe 31, rain and snow are prevented from entering the first cavity 34 and affecting the heat dissipation work, thus improving its applicability.

[0044] like Figure 3 As shown, a maintenance cover 23 is provided at the port of the second protective box 22 away from the first protective box 1. The maintenance cover 23 is connected to the second protective box 22 by bolts. By setting the maintenance cover 23, the heat exchange between the heat dissipation fins 24 and evaporation tubes 26 inside the second protective box 22 and the external environment is reduced, and the external environment is prevented from participating in the heat dissipation process and affecting the overall heat dissipation efficiency.

[0045] like Figure 1 As shown, multiple mounting bases 14 are symmetrically installed at the bottom of the first protective housing 1. The mounting base 14 has a U-shaped design and multiple mounting holes 15 are opened at the bottom of the mounting base 14. The multiple mounting holes 15 are equidistantly distributed along the length direction of the mounting base 14. By setting the mounting base 14, it is convenient to position and install the present invention on the power transmission support.

[0046] like Figure 1 As shown, the outer side of the circulation pipe 27 is provided with a mounting shell 32 corresponding to its shape. The mounting shell 32 is connected to the first protective box 1 and the second protective box 22 respectively by bolts. By setting the mounting shell 32, the exposed part of the evaporator pipe 26 is insulated, which can reduce the heat interaction between the evaporator pipe 26, the circulation pipe 27 and the external environment, and further improve the heat dissipation effect.

[0047] In summary, the oil-immersed transformer with high heat dissipation and convenient oil replacement, in use, the heat generated in the operation of the transformer is absorbed by the oil, and the heat of the oil is in turn transferred to the evaporation pipe 26 through the first protective box body 1 and the heat dissipation fins 24, and the cooling liquid inside the evaporation pipe 26 absorbs and carries away the heat of the heat dissipation fins 24 inside the plurality of second protective box bodies 22 along the way from the outside of the first protective box body 1, so that the heat dissipation fins 24 can continuously absorb heat, improving the heat dissipation efficiency of the transformer, and the cooling liquid after absorbing heat will in turn pass through the gas-liquid separator 37, the compressor 36, the liquid storage tank 38 and the expansion valve 4 to become a low-temperature state and return to the inside of the evaporation pipe 26 to complete the cycle heat dissipation, thereby ensuring that the temperature of the oil is constant and the operation of the transformer is stable.

[0048] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0049] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed transformer with high heat dissipation and convenient oil change, comprising a first protective box body (1), characterized in that: The first protective box (1) is internally provided with a transformer, the front surface, the rear surface and the left surface of the first protective box (1) are fixedly connected with second protective boxes (22), a plurality of heat dissipation fins (24) are symmetrically arranged in the second protective boxes (22), positioning grooves (25) are formed in the heat dissipation fins (24), and evaporation pipes (26) are arranged in the positioning grooves (25); the evaporation pipes (26) are designed in an S shape, and circulation pipes (27) are arranged between adjacent second protective boxes (22) and connect adjacent evaporation pipes (26); The right surface of the first protective box (1) is fixedly connected with a heat dissipation box (28), two partition plates (33) are symmetrically arranged in the heat dissipation box (28), the heat dissipation box (28) is divided into a first cavity (34) and a second cavity (35) by the partition plates (33), a condenser (11) is arranged in the first cavity (34), and a compressor (36), a gas-liquid separator (37), a liquid storage tank (38) and an expansion valve (4) are arranged in the second cavity (35); One end of one of the circulation pipes (27) penetrates through the heat dissipation box (28) and is connected with the gas-liquid separator (37), the gas-liquid separator (37) is connected with the compressor (36) through a pipeline, the compressor (36) is connected with the condenser (11) through a pipeline, the condenser (11) is connected with the liquid storage tank (38) through a pipeline, the liquid storage tank (38) is connected with the expansion valve (4) through a pipeline, one end of the other circulation pipe (27) penetrates through the heat dissipation box (28) and is connected with the expansion valve (4), and an air inlet (8) is formed in the bottom of the first cavity (34) and is provided with a blowing fan (9).

2. The oil-immersed transformer of claim 1, wherein: The transformer comprises an iron core (5), and a coil (6) is arranged on a core column of the iron core (5) and fixedly arranged in the first protective box (1); A sealing top cover (2) corresponding to the first protective box (1) is arranged above the first protective box (1), a connecting portion (3) is arranged at the bottom edge of the sealing top cover (2) and the top edge of the first protective box (1), the connecting portions (3) are connected by bolts, a connecting column head (12) corresponding to the coil (6) is arranged on the top of the sealing top cover (2), the connecting column head (12) is connected with the coil (6) through a lead wire at the bottom end, and a plurality of insulators (13) are symmetrically arranged on the top end of the connecting column head (12).

3. The oil-immersed transformer of claim 2, wherein: An installation support (16) is fixedly connected to one side of the top of the sealing top cover (2), an oil pillow (17) is fixedly arranged on one side of the top of the installation support (16), an oil inlet (18) is arranged on the top of the oil pillow (17), a safety air duct (19) is connected to the bottom of the oil pillow (17), a gas relay (10) is arranged on the safety air duct (19), and the bottom end of the safety air duct (19) is connected with the sealing top cover (2). The first protection box (1) is provided with an oil outlet (21) at one side of the bottom, and an electromagnetic valve is installed inside the oil outlet (21) and the oil inlet (18).

4. The oil immersed transformer of claim 1, wherein: The heat dissipation box (28) is provided with a dust filter screen (7) between the triangular plates (29), and the dust filter screen (7) is located below the bottom of the air inlet (8) and connected with the triangular plates (29) on both sides.

5. The oil immersed transformer of claim 1, wherein: The bottom of the heat dissipation box (28) away from the first protection box (1) is provided with a rain baffle (30) on one side, and the rain baffle (30) is connected with the heat dissipation box (28) on the top.

6. The oil immersed transformer of claim 1, wherein: The second protection box (22) is provided with a maintenance cover plate (23) at the port away from the first protection box (1), and the maintenance cover plate (23) is connected with the second protection box (22) by bolts.

7. The oil immersed transformer of claim 1, wherein: The first protection box (1) is provided with a plurality of installation bases (14) symmetrically installed at the bottom, and the installation bases (14) are designed in U shape.

8. The oil immersed transformer of claim 1, wherein: The outside of the circulation pipe (27) is provided with an installation shell (32) corresponding to the shape, and the installation shell (32) is connected with the first protection box (1) and the second protection box (22) by bolts.

Images