Environment-friendly oil-immersed transformer

Abstract

The invention relates to an environment-friendly oil-immersed transformer, and belongs to the technical field of oil-immersed transformers, the environment-friendly oil-immersed transformer comprises a mounting seat, an oil tank, a fixed seat, an iron core, an oil conservator and a wiring sleeve, and further comprises a heat dissipation mechanism; the heat exchange mechanism is fixedly connected to the outer surface of the oil tank and used for dissipating heat of transformer oil in the oil tank; a slow flow mechanism; and a conveying mechanism. According to the oil-immersed transformer, through the arrangement of the heat exchange mechanism, when the oil-immersed transformer is subjected to heat dissipation, due to the fact that the liquid inlet mode of the heat exchange pipe is that the liquid flows through the upper end of the iron core by one circle, then flows through the bottom of the iron core by one circle and then flows back into the water cooling box, hotter transformer oil is located at the upper layer position of the oil tank; therefore, the transformer oil in the oil tank can be better cooled, the probability that the transformer oil is oxidized and the lubricity is reduced due to the temperature is reduced, the transformer oil is well protected, and the service life of the oil-immersed transformer is prolonged.

Description

Technical Field

[0001] This invention belongs to the technical field of oil-immersed transformers, and specifically relates to an environmentally friendly oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers are transformers that rely on oil as a cooling medium. Due to their excellent cooling and insulation performance and long service life, they occupy an important position in the power system. Oil-immersed transformers generally consist of two parts: the transformer body and the oil tank. They typically employ three cooling methods: oil-immersed self-cooling, oil-immersed air-cooling, and forced oil circulation.

[0003] Currently, existing forced oil circulation oil-immersed transformers, while capable of extracting hot oil via an oil pump and cooling it through an external cooler, suffer from low convection rates due to the fixed pump positions. This results in localized oil accumulation, leading to inefficient heat dissipation and excessive internal temperatures. Consequently, the irreversible degradation of the insulation system is accelerated, significantly shortening the transformer's lifespan and increasing the probability and severity of internal faults. This poses a serious threat to the safe and stable operation of the power grid and the economic viability of assets. Therefore, an environmentally friendly oil-immersed transformer is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reasonably designed and environmentally friendly oil-immersed transformer in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] An environmentally friendly oil-immersed transformer includes a mounting base, an oil tank, a fixed base, an iron core, an oil conservator, and a bushing, and further includes:

[0007] A heat dissipation mechanism fixedly connected to the outer surface of the fuel tank;

[0008] A heat exchange mechanism fixedly connected to the outer surface of the oil tank for dissipating heat from the transformer oil inside the tank;

[0009] A flow-slowing mechanism that is fixedly connected inside the oil tank to slowly agitate the transformer oil;

[0010] A conveying mechanism that is rotatably and sealed to a fixed base for conveying transformer oil within a heat dissipation mechanism.

[0011] As a further optimization of the present invention, the heat exchange mechanism includes a water-cooled box fixedly connected to one side of the oil tank, a pump body fixedly connected to the top of the water-cooled box, a liquid delivery pipe fixedly connected to the discharge end of the pump body, and a liquid suction end of the pump body penetrating the water-cooled box and extending into the interior of the water-cooled box. Heat dissipation chambers are installed on both sides of the oil tank, and the heat dissipation chambers on both sides of the oil tank are fixedly connected through a connecting pipe. One end of one heat dissipation chamber is fixedly connected to the liquid delivery pipe, and one end of the other heat dissipation chamber is fixedly connected to a heat exchange pipe. The heat exchange pipe penetrates the oil tank and extends into the interior of the oil tank, and the other end of the heat exchange pipe is fixedly connected to the water-cooled box. A liquid filling pipe is fixedly connected to the top of the water-cooled box.

[0012] As a further optimization of the present invention, the heat exchange tube located inside the oil tank is located on the outer surface of the iron core, and is located at the top and bottom of the iron core.

[0013] As a further optimization of the present invention, the heat dissipation mechanism includes an oil supply pipe fixedly connected to the oil tank, one end of the oil supply pipe being fixedly connected to a heat dissipation pipe, and a heat dissipation plate being fixedly connected to the outer surface of the oil tank, the heat dissipation plate being fixedly connected to the outer surface of the oil supply pipe and the heat dissipation pipe.

[0014] As a further optimization of the present invention, the oil pipeline is cylindrical, the heat dissipation pipe is flat, the maximum outer diameter of the flat heat dissipation pipe is equal to the outer diameter of the oil pipeline, and the heat dissipation chamber penetrates the heat dissipation plate and is fixedly connected to the heat dissipation plate.

[0015] As a further optimization of the present invention, the flow control mechanism includes a drive motor fixedly connected to one side of the oil tank, a rotating shaft fixedly connected to the output end of the drive motor, a plurality of first bevel gears fixedly connected to the outer surface of the rotating shaft, and guide vanes fixedly connected to the outer surface of the rotating shaft. The plurality of first bevel gears are all located in a fixed seat, and the guide vanes are located in the transformer oil of the oil tank.

[0016] As a further optimization of the present invention, one end of the fixed seat is configured as an arc shape, the guide vane is positioned opposite the arc-shaped end of the fixed seat, and the rotating shaft passes through the oil tank and the fixed seat and is rotatably and sealed to the oil tank and the fixed seat.

[0017] As a further optimization of the present invention, the conveying mechanism includes a transmission shaft that is rotatably and sealed through a fixed base. A second bevel gear and a conveying blade are respectively fixedly connected to both ends of the transmission shaft. A liquid delivery wheel is fixedly connected to the outer surface of the transmission shaft. A liquid delivery chamber is fixedly connected to the bottom of the heat exchange tube. The liquid delivery wheel is located inside the liquid delivery chamber. The transmission shaft passes through the liquid delivery chamber and is rotatably and sealed through the liquid delivery chamber.

[0018] As a further optimization of the present invention, the second bevel gear meshes with the first bevel gear, the second bevel gear is located in the fixed seat, and the conveying blade is located in the oil pipeline.

[0019] As a further optimization of the present invention, the oil tank is fixedly connected to the top of the mounting base, the mounting base is fixedly connected to the inner bottom of the oil tank, the iron core is installed on the top of the mounting base, the wiring sleeve is installed on the top of the oil tank and fixedly connected to the iron core, and the oil conservator is fixedly connected to the top of the oil tank.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. By designing a heat exchange mechanism, this invention allows for better heat dissipation of the oil-immersed transformer. The heat exchange tubes allow the liquid to flow through the upper part of the core, then through the bottom, before returning to the water-cooling tank. Since the hotter transformer oil is located in the upper layer of the tank, this design effectively dissipates heat from the transformer oil, reducing the probability of oxidation and decreased lubricity due to temperature fluctuations. This provides excellent protection for the transformer oil and extends the service life of the oil-immersed transformer.

[0022] 2. This invention, through the design of a heat dissipation mechanism, ensures that during operation of the oil-immersed transformer, the density difference between the hotter and cooler transformer oil causes the hotter oil to flow upwards from the bottom of the tank, while the cooler oil flows downwards from the top. This natural convection of the transformer oil within the tank, combined with the large contact area between the heat dissipation pipes and the external environment, results in the transformer oil flowing downwards within the pipes. This further enhances the heat dissipation efficiency of the transformer oil within the tank. Simultaneously, the heat dissipation plate further improves the heat dissipation efficiency, providing excellent protection for the oil-immersed transformer and ensuring its stable operation, thereby guaranteeing the stability of the power system.

[0023] 3. By setting up a slow-flow mechanism, the present invention enables the pump body to start the motor while the transformer oil in the tank is being cooled, so that the rotating shaft drives the guide vanes to rotate, slowly conveying the transformer oil near the water-cooled tank to the other end. During the slow conveying process, since the end of the fixed seat is set to be arc-shaped, the transformer oil can be made to flow slowly to both sides of the iron core under the action of the arc part of the fixed seat, which improves the convection efficiency of the transformer oil and enables the transformer oil to better cool the iron core. At the same time, since the transformer oil flows slowly, it will not interfere with the coils wound on the outer surface of the iron core.

[0024] 4. This invention, through the setting of the conveying mechanism, allows the slow-flow mechanism to drive the conveying mechanism during operation, enabling the liquid conveying wheel to agitate and transport the coolant. This allows the coolant to absorb more heat and accelerates its flow rate, preventing the coolant from absorbing heat and reaching a temperature higher than the transformer oil, thus avoiding negative impacts on the transformer oil. The rotation of the conveying blades draws transformer oil from the oil delivery pipe, allowing the hot oil in the upper layer of the tank to flow to the middle and lower layers through the heat dissipation pipe. This further improves the heat exchange efficiency of the transformer oil in the tank, thereby increasing the heat dissipation efficiency of the transformer oil and reducing the probability of oxidation and decreased lubricity of the transformer oil due to temperature. This provides good protection for the transformer oil and extends the service life of the oil-immersed transformer. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the back of the present invention;

[0027] Figure 3 This is a three-dimensional partial cross-sectional bottom view of the present invention;

[0028] Figure 4 This is a three-dimensional partial cross-sectional front view of the present invention;

[0029] Figure 5 This is a three-dimensional partial cross-sectional top view of the present invention;

[0030] Figure 6 This is a three-dimensional structural diagram of the heat exchange mechanism and the conveying mechanism of the present invention;

[0031] Figure 7 This is a three-dimensional structural diagram of the conveying mechanism of the present invention;

[0032] Figure 8 This is a schematic diagram of the side profile of the present invention.

[0033] Figure 9 This is a front cross-sectional view of the present invention.

[0034] In the diagram: 1. Mounting base; 2. Oil tank; 3. Fixing base; 4. Iron core; 5. Oil conservator; 6. Wiring sleeve; 7. Heat dissipation mechanism; 71. Oil delivery pipe; 72. Heat dissipation pipe; 73. Heat dissipation plate; 8. Heat exchange mechanism; 81. Water cooling box; 82. Pump body; 83. Infusion pipe; 84. Heat dissipation chamber; 85. Connecting pipe; 86. Heat exchange pipe; 87. Liquid filling pipe; 9. Flow control mechanism; 91. Drive motor; 92. Rotating shaft; 93. First bevel gear; 94. Guide vane; 10. Conveying mechanism; 101. Drive shaft; 102. Second bevel gear; 103. Infusion wheel; 104. Infusion chamber; 105. Conveying vane. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0036] Example:

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, an environmentally friendly oil-immersed transformer includes a mounting base 1, an oil tank 2 fixedly connected to the top of the mounting base 1, a fixing seat 3 fixedly connected to the bottom of the oil tank 2, an iron core 4 mounted on the top of the fixing seat 3, a connecting sleeve 6 fixedly connected to the iron core 4 on the top of the oil tank 2, and an oil conservator 5 fixedly connected to the top of the oil tank 2. In addition, the oil-immersed transformer is also equipped with a gas relay, tap changer, safety vent, oil drain valve, dehumidifier, oil gauge, and signal thermometer, etc. (Gas relay, tap changer, safety vent, oil drain valve, dehumidifier, etc.) (The oil gauge and signal thermometer are existing technologies and are not shown in the figure, so they will not be described in detail.) A heat dissipation mechanism 7 is fixedly connected to the outer surface of the oil tank 2. The heat dissipation mechanism 7 includes an oil supply pipe 71 that is fixedly connected to the oil tank 2. One end of the oil supply pipe 71 is fixedly connected to a heat dissipation pipe 72. A heat dissipation plate 73 is fixedly connected to the outer surface of the oil tank 2. The heat dissipation plate 73 is fixedly connected to the outer surface of the oil supply pipe 71 and the heat dissipation pipe 72. The oil supply pipe 71 is cylindrical, and the heat dissipation pipe 72 is flat. The maximum outer diameter of the flat heat dissipation pipe 72 is equal to the outer diameter of the oil supply pipe 71.

[0038] When the oil-immersed transformer is in operation, due to the density difference between the hotter and cooler transformer oil, the hotter transformer oil flows upward from the bottom of the tank 2, while the cooler transformer oil flows downward from the top of the tank 2. This allows for natural convection of the transformer oil within the tank 2. Furthermore, because the heat dissipation pipe 72 has a large contact area with the external environment, the transformer oil within the heat dissipation pipe 72 flows downward, thereby improving the heat dissipation efficiency of the transformer oil within the tank 2. Simultaneously, the heat dissipation plate 73 further enhances the heat dissipation efficiency of the transformer oil within the tank 2, providing excellent protection for the oil-immersed transformer and ensuring its stable operation, thus guaranteeing the stability of the power system.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, a heat exchange mechanism 8 for dissipating heat from the transformer oil inside the tank 2 is fixedly connected to the outer surface of the tank 2. The heat exchange mechanism 8 includes a water-cooled box 81 fixedly connected to one side of the tank 2. A pump body 82 is fixedly connected to the top of the water-cooled box 81. The discharge end of the pump body 82 is fixedly connected to a liquid delivery pipe 83. The suction end of the pump body 82 penetrates the water-cooled box 81 and extends into the coolant inside the water-cooled box 81. Heat dissipation chambers 84 are installed on both sides of the tank 2. The heat dissipation chambers 84 penetrate the heat dissipation plate 73 and are fixedly connected to the heat dissipation plate 73. The heat dissipation chambers 84 are fixedly connected via a connecting pipe 85. One end of one heat dissipation chamber 84 is fixedly connected to the infusion pipe 83, and one end of the other heat dissipation chamber 84 is fixedly connected to a heat exchange pipe 86. The heat exchange pipe 86 passes through the oil tank 2 and extends into the interior of the oil tank 2. The heat exchange pipe 86 located inside the oil tank 2 is situated on the outer surface of the iron core 4, and is located at the top and bottom of the iron core 4. The other end of the heat exchange pipe 86 is fixedly connected to a water-cooled box 81. A liquid filling pipe 87 is fixedly connected to the top of the water-cooled box 81, and a sealing cap is threaded onto the top of the liquid filling pipe 87. Figure 9 As shown in the figure, a represents the flow direction of the cooling liquid inside heat exchanger tube 86.

[0040] When the oil-immersed transformer is in operation, if natural convection is insufficient to dissipate heat from the transformer oil in tank 2, pump 82 is activated to draw coolant from water-cooled tank 81. The drawn coolant is then injected into a heat dissipation chamber 84 via inlet pipe 83. The coolant in heat dissipation chamber 84 is then injected into another heat dissipation chamber 84 via connecting pipe 85, and from there into heat exchange pipe 86. The heat exchange pipe 86 then cools the transformer oil in tank 2. Since the liquid inlet method of heat exchange pipe 86 is to first circulate once at the top of core 4, then once at the bottom of core 4, and then return to water-cooled tank 81, and since the hotter transformer oil is located in the upper part of tank 2, it can better dissipate heat from the transformer oil in tank 2. This reduces the probability of oxidation and decreased lubricity of the transformer oil caused by temperature, provides good protection for the transformer oil, and extends the service life of the oil-immersed transformer.

[0041] In addition, when the coolant flows in the two heat dissipation chambers 84, it will dissipate heat from the heat dissipation plate 73 and the transformer oil in the heat dissipation pipe 72, further improving the heat dissipation efficiency of the heat dissipation plate 73 and the heat dissipation pipe 72 on the transformer oil.

[0042] like Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, a slow-flow mechanism 9 for slowly agitating transformer oil is fixedly connected inside the oil tank 2. The slow-flow mechanism 9 includes a drive motor 91 fixedly connected to one side of the oil tank 2. A rotating shaft 92 is fixedly connected to the output end of the drive motor 91. The rotating shaft 92 passes through the oil tank 2 and the fixed seat 3 and is rotatably connected to the oil tank 2 and the fixed seat 3 in a sealed manner. Multiple first bevel gears 93 are fixedly connected to the outer surface of the rotating shaft 92. A guide vane 94 is fixedly connected to the outer surface of the rotating shaft 92. The multiple first bevel gears 93 are all located inside the fixed seat 3. The guide vane 94 is located inside the transformer oil in the oil tank 2. One end of the fixed seat 3 is set to be arc-shaped, and the guide vane 94 is directly opposite the arc-shaped end of the fixed seat 3.

[0043] When natural convection fails to cool the transformer oil in tank 2, the pump body 82 operates while the drive motor 91 is activated, causing the shaft 92 to rotate and guide vanes 94 to slowly transport the transformer oil near the water-cooled tank 81 to the other end. During this slow transport, the end of the fixed seat 3 is arc-shaped, which allows the transformer oil to flow slowly to both sides of the core 4 under the action of the arc-shaped part of the fixed seat 3, enhancing the convection efficiency of the transformer oil and enabling the transformer oil to better cool the core 4. At the same time, since the transformer oil flows slowly, it will not interfere with the coils wound on the outer surface of the core 4.

[0044] like Figure 3 , Figure 6 and Figure 7 , Figure 8 and Figure 9 As shown, a conveying mechanism 10 for conveying transformer oil in the heat dissipation mechanism 7 is rotatably connected to the fixed base 3. The conveying mechanism 10 includes a drive shaft 101 that is rotatably connected to the fixed base 3. A second bevel gear 102 and a conveying blade 105 are fixedly connected to both ends of the drive shaft 101, respectively. The second bevel gear 102 is located inside the fixed base 3 and meshes with the first bevel gear 93. The conveying blade 105 is located inside the oil pipe 71. A liquid conveying wheel 103 is fixedly connected to the outer surface of the drive shaft 101. A liquid conveying chamber 104 is fixedly connected to the bottom of the heat exchange tube 86. The liquid conveying wheel 103 is located inside the liquid conveying chamber 104. The drive shaft 101 passes through the liquid conveying chamber 104 and is rotatably connected to the liquid conveying chamber 104.

[0045] When the rotating shaft 92 rotates, it will drive the first bevel gear 93 to rotate, which in turn drives the transmission shaft 101 to rotate via the second bevel gear 102, causing the infusion wheel 103 and the conveying blade 105 to rotate. Figure 9 As shown, the fluid delivery wheel 103 rotates clockwise. Therefore, when the fluid delivery wheel 103 rotates, it can agitate and deliver the coolant, allowing the coolant to absorb more heat and accelerating the flow rate of the coolant. This prevents the coolant from absorbing heat and reaching a temperature higher than the transformer oil, thus avoiding negative impacts on the transformer oil. The rotation of the delivery blades 105 will draw transformer oil from the oil delivery pipe 71, allowing the hot oil in the upper layer of the oil tank 2 to flow to the middle and lower layers of the oil tank 2 through the heat dissipation pipe 72. This further improves the heat exchange efficiency of the transformer oil in the oil tank 2, thereby improving the heat dissipation efficiency of the transformer oil in the oil tank 2, reducing the probability of oxidation and decreased lubricity of the transformer oil due to temperature, providing good protection for the transformer oil, and extending the service life of the oil-immersed transformer.

[0046] The specific working principle of this invention is as follows:

[0047] When the oil-immersed transformer is in operation, due to the density difference between the hotter and colder transformer oil, the hotter transformer oil will flow upward from the bottom of the tank 2, while the colder transformer oil will flow downward from the top of the tank 2. This allows for natural convection of the transformer oil within the tank 2. Furthermore, because the heat dissipation pipe 72 has a large contact area with the external environment, the transformer oil within the heat dissipation pipe 72 will flow downward, thereby improving the heat dissipation efficiency of the transformer oil within the tank 2. Simultaneously, the heat dissipation plate 73 further enhances the heat dissipation efficiency of the transformer oil within the tank 2, providing excellent protection for the oil-immersed transformer and ensuring its stable operation, thus guaranteeing the stability of the power system operation.

[0048] When natural convection fails to dissipate heat from the transformer oil in tank 2, pump 82 is activated to draw coolant from water-cooled tank 81. Simultaneously, drive motor 91 is activated based on the transformer oil temperature, and the drawn coolant is injected into a heat dissipation chamber 84 through infusion pipe 83. The coolant in this heat dissipation chamber 84 is then injected into another heat dissipation chamber 84 through connecting pipe 85, and from there into heat exchange tube 86. The heat exchange tube 86 then cools the transformer oil in tank 2. Since the liquid inlet method of heat exchange tube 86 is to first circulate once at the top of iron core 4, then once at the bottom of iron core 4, and then return to water-cooled tank 81, and since the hotter transformer oil is located in the upper layer of tank 2, it can better dissipate heat from the transformer oil in tank 2, reducing the probability of oxidation and decreased lubricity of the transformer oil caused by temperature, thus providing good protection for the transformer oil and extending the service life of the oil-immersed transformer.

[0049] In addition, when the coolant flows in the two heat dissipation chambers 84, it will dissipate heat from the heat dissipation plate 73 and the transformer oil in the heat dissipation pipe 72, further improving the heat dissipation efficiency of the heat dissipation plate 73 and the heat dissipation pipe 72 on the transformer oil.

[0050] The operation of the drive motor 91 causes the rotating shaft 92 to rotate, driving the guide vanes 94 to slowly transport the transformer oil near the water-cooled tank 81 to the other end. During this slow transport, because the end of the fixed seat 3 is arc-shaped, the transformer oil can flow slowly to both sides of the iron core 4 under the action of the arc part of the fixed seat 3, enhancing the convection efficiency of the transformer oil and enabling the transformer oil to better dissipate heat from the iron core 4. At the same time, because the transformer oil flows slowly, it will not interfere with the coils wound on the outer surface of the iron core 4. Meanwhile, when the rotating shaft 92 rotates, it will drive the first bevel gear 93 to rotate, which in turn drives the transmission shaft 101 to rotate through the second bevel gear 102, causing the liquid delivery wheel 103 and the conveying vanes 105 to rotate. Figure 9 As shown, the fluid delivery wheel 103 rotates clockwise. Therefore, when the fluid delivery wheel 103 rotates, it can agitate and deliver the coolant, allowing the coolant to absorb more heat and accelerating the flow rate of the coolant. This prevents the coolant from absorbing heat and reaching a temperature higher than the transformer oil, thus avoiding negative impacts on the transformer oil. The rotation of the delivery blades 105 will draw transformer oil from the oil delivery pipe 71, allowing the hot oil in the upper layer of the oil tank 2 to flow to the middle and lower layers of the oil tank 2 through the heat dissipation pipe 72. This further improves the heat exchange efficiency of the transformer oil in the oil tank 2, thereby improving the heat dissipation efficiency of the transformer oil in the oil tank 2, reducing the probability of oxidation and decreased lubricity of the transformer oil due to temperature, providing good protection for the transformer oil, and extending the service life of the oil-immersed transformer.

[0051] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly oil-immersed transformer, comprising a mounting base (1), an oil tank (2), a fixing base (3), an iron core (4), an oil conservator (5), and a bushing (6), characterized in that, Also includes: A heat dissipation mechanism (7) is fixedly connected to the outer surface of the oil tank (2); A heat exchange mechanism (8) is fixedly connected to the outer surface of the oil tank (2) for dissipating heat from the transformer oil inside the oil tank (2); A slow-flow mechanism (9) is fixedly connected inside the oil tank (2) to slowly agitate the transformer oil. A conveying mechanism (10) for conveying transformer oil inside the heat dissipation mechanism (7) is sealed and rotatably connected to the fixed base (3).

2. The environmentally friendly oil-immersed transformer according to claim 1, characterized in that: The heat exchange mechanism (8) includes a water-cooled box (81) fixedly connected to one side of the oil tank (2). A pump body (82) is fixedly connected to the top of the water-cooled box (81). The discharge end of the pump body (82) is fixedly connected to a delivery pipe (83). The suction end of the pump body (82) passes through the water-cooled box (81) and extends into the interior of the water-cooled box (81). Heat dissipation chambers (84) are installed on both sides of the oil tank (2). The heat dissipation chambers (84) on both sides of the oil tank (2) are fixedly connected through a connecting pipe (85). One end of one heat dissipation chamber (84) is fixedly connected to the delivery pipe (83). One end of the other heat dissipation chamber (84) is fixedly connected to a heat exchange pipe (86). The heat exchange pipe (86) passes through the oil tank (2) and extends into the interior of the oil tank (2). The other end of the heat exchange pipe (86) is fixedly connected to the water-cooled box (81). A liquid filling pipe (87) is fixedly connected to the top of the water-cooled box (81).

3. The environmentally friendly oil-immersed transformer according to claim 2, characterized in that: The heat exchange tube (86) located in the oil tank (2) is located on the outer surface of the iron core (4) and at the top and bottom of the iron core (4).

4. The environmentally friendly oil-immersed transformer according to claim 2, characterized in that: The heat dissipation mechanism (7) includes an oil supply pipe (71) fixedly connected to the oil tank (2), one end of the oil supply pipe (71) is fixedly connected to a heat dissipation pipe (72), and a heat dissipation plate (73) is fixedly connected to the outer surface of the oil tank (2). The heat dissipation plate (73) is fixedly connected to the outer surface of the oil supply pipe (71) and the heat dissipation pipe (72).

5. The environmentally friendly oil-immersed transformer according to claim 4, characterized in that: The oil supply pipe (71) is cylindrical, and the heat dissipation pipe (72) is flat. The maximum outer diameter of the flat heat dissipation pipe (72) is equal to the outer diameter of the oil supply pipe (71). The heat dissipation chamber (84) passes through the heat dissipation plate (73) and is fixedly connected to the heat dissipation plate (73).

6. The environmentally friendly oil-immersed transformer according to claim 4, characterized in that: The flow control mechanism (9) includes a drive motor (91) fixedly connected to one side of the oil tank (2). The output end of the drive motor (91) is fixedly connected to a rotating shaft (92). Multiple first bevel gears (93) are fixedly connected to the outer surface of the rotating shaft (92). Guide vanes (94) are fixedly connected to the outer surface of the rotating shaft (92). The multiple first bevel gears (93) are all located in the fixed seat (3). The guide vanes (94) are located in the transformer oil of the oil tank (2).

7. An environmentally friendly oil-immersed transformer according to claim 6, characterized in that: One end of the fixed seat (3) is set in an arc shape, and the guide vane (94) is set in an arc shape opposite the fixed seat (3). The rotating shaft (92) passes through the oil tank (2) and the fixed seat (3) and is sealed and rotatably connected to the oil tank (2) and the fixed seat (3).

8. An environmentally friendly oil-immersed transformer according to claim 6, characterized in that: The conveying mechanism (10) includes a drive shaft (101) that is rotatably and sealed through the fixed base (3). The two ends of the drive shaft (101) are respectively fixedly connected to a second bevel gear (102) and a conveying blade (105). The outer surface of the drive shaft (101) is fixedly connected to a liquid delivery wheel (103). The bottom of the heat exchange tube (86) is fixedly connected to a liquid delivery chamber (104). The liquid delivery wheel (103) is located inside the liquid delivery chamber (104). The drive shaft (101) passes through the liquid delivery chamber (104) and is rotatably and sealed through the liquid delivery chamber (104).

9. An environmentally friendly oil-immersed transformer according to claim 8, characterized in that: The second bevel gear (102) is located inside the fixed seat (3), and the second bevel gear (102) meshes with the first bevel gear (93). The conveying blade (105) is located inside the oil pipe (71).

10. An environmentally friendly oil-immersed transformer according to claim 1, characterized in that: The oil tank (2) is fixedly connected to the top of the mounting base (1), the fixing base (3) is fixedly connected to the bottom of the oil tank (2), the iron core (4) is installed on the top of the fixing base (3), the wiring sleeve (6) is installed on the top of the oil tank (2) and connected to the iron core (4), and the oil conservator (5) is fixedly connected to the top of the oil tank (2).

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