Efficient heat dissipation oil-immersed transformer

Abstract

The invention provides an efficient heat dissipation oil-immersed transformer, and belongs to the technical field of oil-immersed transformers, the efficient heat dissipation oil-immersed transformer comprises a transformer box body and an oil tank, and the bottom of the oil tank is provided with a communicating pipe communicated with the interior of the transformer box body. Wherein a plurality of evenly distributed rubber pipes are arranged in the oil tank, and the two ends of each rubber pipe are connected to the end face of the oil tank through the connecting pipes and extend to the outer side of the end face of the oil tank, so that a plurality of heat dissipation channels allowing airflow to penetrate through are formed in the oil tank. The cooling speed of oil in the oil tank is increased by utilizing the multiple heat dissipation channels, then the speed of circulating convection of low-temperature oil in the oil tank and high-temperature oil in the transformer tank is increased, the space in the oil tank is fully utilized to cool insulating oil in the transformer tank, and the heat dissipation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil-immersed transformers, and particularly relates to an efficient heat dissipation oil-immersed transformer. BACKGROUND

[0002] The oil-immersed transformer is a kind of power transformer using insulating oil as the main insulating medium and cooling medium. The main difference between the oil-immersed transformer and the dry-type transformer lies in that the dry-type transformer adopts air cooling for heat dissipation, while the oil-immersed transformer adopts insulating oil for cooling, and an oil storage tank is arranged above the transformer to accommodate the volume expansion and contraction of the insulating oil due to temperature change, and to minimize the contact of the insulating oil with air, thereby prolonging the service life of the insulating oil.

[0003] At present, when the insulating oil is cooled, only the heat dissipation device installed on the transformer is used for heat dissipation, and the oil in the oil storage tank lacks effective cooling means, so that the oil in the oil storage tank is slowly cooled, cannot be quickly cooled, and cannot form a circulating convection with the oil in the transformer, and the insulating oil in the oil storage tank cannot be fully utilized to cool the inside of the transformer. SUMMARY

[0004] In view of the above problems, the present application aims to provide an efficient heat dissipation oil-immersed transformer to at least partially solve the problems in the background.

[0005] The technical scheme adopted by the present application is as follows: the present application provides an efficient heat dissipation oil-immersed transformer, which comprises: a transformer tank body, one side of the top of which is connected with an oil tank for storing insulating oil; a communication pipe is arranged at the bottom of the oil tank and communicates with the inside of the transformer tank body; wherein, a plurality of rubber pipes are arranged in the oil tank, the rubber pipes are arranged in parallel with the length direction of the oil tank, both ends of the rubber pipes are provided with connecting pipes, both ends of the rubber pipes are connected to the end face of the oil tank through the connecting pipes, and extend to the outside of the end face of the oil tank, so that a plurality of heat dissipation channels for air flow are formed in the oil tank; one end of the oil tank is provided with a fan for forming air flow in the rubber pipe.

[0006] Further, a fixed baffle is arranged at both ends of the rubber pipe, the fixed baffle is connected to the inner wall bottom of the connecting pipe, so that the inner wall bottom of the connecting pipe is closed, and a liquid level detection sensor is arranged at any one end of the rubber pipe, the liquid level detection sensor is connected to the inner wall top of the connecting pipe, and the detection end of the liquid level detection sensor faces downward.

[0007] Further, the fixed baffle is rotatably connected with a movable baffle, when the movable baffle rotates to the top of the connecting pipe, the port of the connecting pipe is sealed by the fixed baffle and the movable baffle.

[0008] Further, the fixed baffle and the movable baffle are sealed by the opposite sides of each other, when the movable baffle rotates to the top of the connecting pipe, the fixed baffle and the movable baffle are provided with the overlapping part of each other.

[0009] Further, the rubber tube is provided with a driving motor at both ends, the driving motor is installed in the connecting pipe, the output shaft of the driving motor is connected with the movable baffle, and the movable baffle is driven to rotate.

[0010] Further, the outer diameter of the driving motor is smaller than the inner diameter of the connecting pipe.

[0011] Further, the outer side of the driving motor is provided with a first support frame, and the driving motor is connected to the connecting pipe through the first support frame.

[0012] Further, the liquid level detection sensor is provided with a second support frame, and the liquid level detection sensor is connected to the connecting pipe through the second support frame.

[0013] Further, the top of the oil tank is provided with an oil filling pipe, the oil filling pipe is communicated with the inside of the oil tank, and the oil tank is filled with insulating oil.

[0014] Further, the outer side of the transformer tank is provided with a radiator, and the radiator is communicated with the inside of the transformer tank.

[0015] Beneficial effects: 1. By arranging a plurality of rubber tubes in the oil tank, and making the inside of the rubber tube communicated with the outside air, a plurality of heat dissipation channels for air flow are formed in the oil tank, the cooling speed of the oil in the oil tank is improved, and the speed of the low-temperature oil in the oil tank and the high-temperature oil in the transformer tank is accelerated, so that the space in the oil tank is fully utilized to cool the insulating oil in the transformer tank, and the heat dissipation efficiency is improved.

[0016] 2. By the contraction or expansion of the rubber tube, the effective volume of the oil tank can be changed, so that the oil tank can normally accommodate the insulating oil in the transformer tank, and the volume expansion and contraction caused by temperature change.

[0017] 3. The liquid level detection sensor is used to monitor whether the rubber tube is leaking in real time, and the corresponding drive motor is linked to drive the movable baffle to rotate, which seals the connecting pipes at both ends of the leaking rubber tube. This achieves real-time monitoring of leakage and precise sealing of the leaking rubber tube, while the other rubber tubes are unaffected. The oil tank can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank due to temperature changes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention; Figure 2 This is a schematic diagram showing the installation position of the fan in a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the oil tank in a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection between the rubber tube and the connecting pipe in a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the rubber tube and connecting pipe in a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the end face structure of the connecting pipe in a high-efficiency heat-dissipating oil-immersed transformer according to an embodiment of the present invention.

[0019] Among them, 1. Transformer housing; 11. Radiator; 2. Oil tank; 21. Connecting pipe; 22. Oil injection pipe; 3. Rubber hose; 301. Heat dissipation channel; 4. Connecting pipe; 5. Fixed baffle; 6. Movable baffle; 601. Overlapping part; 7. Drive motor; 71. First support frame; 8. Liquid level detection sensor; 81. Second support frame; 9. Fan.

[0020] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0022] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0023] Combination Figure 1 As shown, this embodiment of the invention provides a high-efficiency heat-dissipating oil-immersed transformer, including a transformer housing 1 and an oil tank 2, with the oil tank 2 disposed on one side of the top of the transformer housing 1.

[0024] The bottom of the oil tank 2 is provided with a connecting pipe 21. One end of the connecting pipe 21 is connected to the inside of the transformer housing 1, and the other end of the connecting pipe 21 is connected to the inside of the oil tank 2.

[0025] The top of the oil tank 2 is equipped with an oil injection pipe 22, which is connected to the inside of the oil tank 2. Insulating oil can be added into the oil tank 2 through the oil injection pipe 22.

[0026] A radiator 11 is provided on the outside of the transformer housing 1. The radiator 11 is composed of multiple heat dissipation fins with a hollow structure. The radiator 11 is connected to the inside of the transformer housing 1, so that the oil inside the transformer housing 1 can enter the heat dissipation fins to improve the heat dissipation effect.

[0027] Combination Figure 2 and Figure 3 As shown, the oil tank 2 has multiple evenly distributed rubber tubes 3 inside. The rubber tubes 3 are arranged parallel to the length direction of the oil tank 2. Both ends of the rubber tubes 3 are provided with connecting pipes 4. The connecting pipes 4 are sealed to the end face of the oil tank 2 and extend to the outside of the end face of the oil tank 2. At this time, the two ends of the rubber tubes 3 are connected to the end face of the oil tank 2 through the connecting pipes 4. The inside of the rubber tubes 3 is in communication with the outside air, so that multiple heat dissipation channels 301 for airflow are formed inside the oil tank 2, thereby improving the cooling rate of the oil inside the oil tank 2.

[0028] In this way, by utilizing multiple heat dissipation channels 301, the cooling rate of the oil inside the oil tank 2 is increased, thereby accelerating the circulation and convection speed between the low-temperature oil inside the oil tank 2 and the high-temperature oil inside the transformer housing 1. This fully utilizes the space inside the oil tank 2 to cool down the insulating oil inside the transformer housing 1 and improves heat dissipation efficiency.

[0029] Meanwhile, the rubber tube 3 has good elasticity. When the insulating oil in the transformer tank 1 expands in volume due to temperature changes, the pressure in the oil tank 2 increases, and the rubber tube 3 is squeezed and contracted. When the insulating oil in the transformer tank 1 contracts in volume due to temperature changes, the pressure in the oil tank 2 decreases, and correspondingly, the rubber tube 3 expands. Therefore, through the contraction or expansion of the rubber tube 3, the oil tank 2 can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank 1 due to temperature changes.

[0030] Furthermore, a fan 9 is provided at one end of the fuel tank 2. Under the action of the fan 9, the air in the heat dissipation channel 301 flows faster, improving the heat dissipation effect.

[0031] In a preferred embodiment, the fan 9 is an axial fan, and the air delivery area of ​​the fan 9 is larger than the inner diameter of the oil tank 2, so that the air delivery area of ​​the fan 9 is sufficient to cover all the heat dissipation channels 301.

[0032] Combination Figure 4 , Figure 5 and Figure 6 As shown, both ends of the rubber tube 3 are provided with fixed baffles 5. The fixed baffles 5 are connected to the bottom of the inner wall of the connecting tube 4, so that the bottom of the inner wall of the connecting tube 4 is sealed. Therefore, when the rubber tube 3 leaks, the leaked insulating oil will accumulate at the bottom of the rubber tube 3 and the connecting tube 4, and as the leakage continues to increase, the level of insulating oil at the bottom of the connecting tube 4 gradually rises.

[0033] A liquid level detection sensor 8 is provided at any end of the rubber hose 3. The liquid level detection sensor 8 is connected to the top of the inner wall of the connecting pipe 4, and the detection end of the liquid level detection sensor 8 faces downward. When insulating oil accumulates at the bottom of the connecting pipe 4 due to leakage, and the level of insulating oil continues to rise, it can be detected by the liquid level detection sensor 8, thereby determining that the rubber hose 3 has leaked and promptly reminding maintenance personnel to carry out maintenance.

[0034] It should be noted that the present invention is equipped with a signal transmission module, which can transmit the signal detected by the liquid level detection sensor 8 to the remote control terminal in real time, so that maintenance personnel can promptly detect leaks in the rubber hose 3.

[0035] In a specific embodiment, the liquid level detection sensor 8 is an ultrasonic liquid level sensor, which uses a non-contact principle for detection to avoid contamination by oil.

[0036] Combination Figure 5 and Figure 6As shown, a movable baffle 6 is rotatably connected to the fixed baffle 5. When the movable baffle 6 rotates to the top of the connecting pipe 4, the port of the connecting pipe 4 is sealed by the fixed baffle 5 and the movable baffle 6. By rotating the movable baffle 6 at both ends of the leaking rubber tube 3 upward, the connecting pipes 4 at both ends of the rubber tube 3 are sealed, so that the inside of the rubber tube 3 is not connected to the outside, and the insulating oil is prevented from leaking further outward.

[0037] Furthermore, each end of the rubber tube 3 is equipped with a drive motor 7, which is installed inside the connecting pipe 4. The output shaft of the drive motor 7 is connected to the movable baffle 6. Therefore, when the liquid level detection sensor 8 detects that insulating oil has accumulated in the connecting pipe 4, the two drive motors 7 at the corresponding positions drive the movable baffle 6 to rotate, thereby sealing the connecting pipes 4 at both ends of the rubber tube 3 and preventing further leakage of insulating oil.

[0038] In a specific embodiment, the outer diameter of the drive motor 7 is smaller than the inner diameter of the connecting pipe 4, so that the drive motor 7 will not block the connecting pipe 4, allowing the airflow to flow through the gap between the drive motor 7 and the inner wall of the connecting pipe 4.

[0039] Thus, the liquid level sensor 8 detects in real time whether there is oil accumulation in the connecting pipe 4. When the rubber tube 3 leaks, the bottom of the connecting pipe 4 is blocked by the fixed baffle 5, and the leaked insulating oil will accumulate at the bottom of the rubber tube 3 and the connecting pipe 4. As the leakage continues to increase, the level of insulating oil at the bottom of the connecting pipe 4 gradually rises and can be detected by the liquid level sensor 8, thereby determining that the rubber tube 3 is leaking. Then, the two drive motors 7 at the corresponding positions are controlled to drive the movable baffle 6 to rotate, thereby sealing the connecting pipes 4 at both ends of the rubber tube 3 and preventing further leakage of insulating oil.

[0040] Combination Figure 5 As shown, a first support frame 71 is provided on the outside of the drive motor 7, and the drive motor 7 is connected to the connecting pipe 4 through the first support frame 71. A second support frame 81 is provided on the liquid level detection sensor 8, and the liquid level detection sensor 8 is connected to the connecting pipe 4 through the second support frame 81.

[0041] It should be noted that the present invention also includes a control unit. The liquid level detection sensor 8 and the drive motor 7 are both connected to the control unit via signal. The control unit controls the movable baffle 6 at the corresponding position to rotate according to the detection signal of each liquid level detection sensor 8, thereby sealing the connecting pipe 4.

[0042] The liquid level sensor 8 is used to monitor in real time whether there is accumulated insulating oil in the connecting pipe 4, thereby determining whether the rubber tube 3 is leaking. The corresponding drive motor 7 is linked to drive the movable baffle 6 to rotate, sealing the connecting pipes 4 at both ends of the leaking rubber tube 3. This achieves real-time monitoring of leakage and accurately seals the leaking rubber tube 3, while the other rubber tubes 3 are unaffected. The oil tank 2 can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank 1 due to temperature changes.

[0043] Combination Figure 6 As shown, the opposite sides of the fixed baffle 5 and the movable baffle 6 are fitted together and sealed. When the movable baffle 6 is rotated to the top of the connecting pipe 4, there is an overlapping part 601 between the fixed baffle 5 and the movable baffle 6, so that when the movable baffle 6 is rotated upward to seal, the fixed baffle 5 and the movable baffle 6 can completely cover the end face of the connecting pipe 4, thereby completely sealing the connecting pipe 4.

[0044] The working principle of this invention is as follows: Multiple rubber tubes 3 installed inside the oil tank 2 extend to the outside of the end face of the oil tank 2 through connecting pipes 4, thereby connecting the inside of the rubber tubes 3 with the outside air. At this time, multiple heat dissipation channels 301 are formed inside the oil tank 2 for airflow to pass through. By utilizing multiple heat dissipation channels 301, the cooling speed of the oil inside the oil tank 2 is increased, thereby accelerating the circulation and convection speed between the low-temperature oil inside the oil tank 2 and the high-temperature oil inside the transformer tank 1. The space inside the oil tank 2 is fully utilized to cool the insulating oil inside the transformer tank 1, thereby improving the heat dissipation efficiency. Meanwhile, the rubber tube 3 has good elasticity. When the insulating oil in the transformer tank 1 expands in volume due to temperature changes, the pressure in the oil tank 2 increases, while the rubber tube 3 is squeezed and contracted. When the insulating oil in the transformer tank 1 contracts in volume due to temperature changes, the pressure in the oil tank 2 decreases, and correspondingly, the rubber tube 3 expands. Through the contraction or expansion of the rubber tube 3, the oil tank 2 can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank 1 due to temperature changes. The liquid level sensor 8 detects in real time whether there is oil accumulation in the connecting pipe 4. When the rubber tube 3 leaks, the leaked insulating oil will accumulate at the bottom of the rubber tube 3 and the connecting pipe 4. As the leakage continues to increase, the level of insulating oil at the bottom of the connecting pipe 4 gradually rises and can be detected by the liquid level sensor 8, thus determining that the rubber tube 3 is leaking. Then, the two drive motors 7 at the corresponding positions are controlled to drive the movable baffle 6 to rotate, thereby sealing the connecting pipes 4 at both ends of the rubber tube 3 to prevent further leakage of insulating oil.

[0045] In summary, by installing multiple rubber tubes 3 inside the oil tank 2, and extending the rubber tubes 3 to the outer side of the end face of the oil tank 2 through connecting pipes 4, the interior of the rubber tubes 3 is connected to the outside air, thereby forming multiple heat dissipation channels 301 for airflow to pass through inside the oil tank 2. By utilizing multiple heat dissipation channels 301, the cooling rate of the oil inside the oil tank 2 is increased, thereby accelerating the circulation and convection speed between the low-temperature oil inside the oil tank 2 and the high-temperature oil inside the transformer tank 1. The space inside the oil tank 2 is fully utilized to cool the insulating oil inside the transformer tank 1, thereby improving heat dissipation efficiency.

[0046] By installing a liquid level detection sensor 8 inside the connecting pipe 4 connected to the rubber tube 3, when the rubber tube 3 leaks, the leaked insulating oil will accumulate at the bottom of the rubber tube 3 and the connecting pipe 4, and can be detected by the liquid level detection sensor 8, thereby determining that the rubber tube 3 is leaking and promptly reminding maintenance personnel to carry out maintenance.

[0047] By setting fixed baffles 5 and movable baffles 6 in the connecting pipes 4 at both ends of the rubber tube 3, the liquid level detection sensor 8 monitors in real time whether there is accumulated insulating oil in the connecting pipes 4, thereby determining whether the rubber tube 3 is leaking. The corresponding drive motor 7 is linked to drive the movable baffle 6 to rotate, sealing the connecting pipes 4 at both ends of the leaking rubber tube 3. This achieves real-time monitoring of leakage and accurately seals the leaking rubber tube 3, while the other rubber tubes 3 are unaffected. The oil tank 2 can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank 1 due to temperature changes.

[0048] Through the contraction or expansion of the rubber tube 3, the oil tank 2 can normally accommodate the volume expansion and contraction of the insulating oil in the transformer tank 1 caused by temperature changes.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A high-efficiency heat-dissipating oil-immersed transformer, characterized in that, include: The transformer housing (1) has an oil tank (2) for storing insulating oil connected to one side of its top. The bottom of the oil tank (2) is provided with a connecting pipe (21) that connects to the inside of the transformer box (1). The oil tank (2) is provided with a plurality of evenly distributed rubber tubes (3). The rubber tubes (3) are arranged parallel to the length direction of the oil tank (2). Both ends of the rubber tubes (3) are provided with connecting pipes (4). The two ends of the rubber tubes (3) are connected to the end face of the oil tank (2) through the connecting pipes (4) and extend to the outside of the end face of the oil tank (2), so that a plurality of heat dissipation channels (301) for airflow to pass through are formed inside the oil tank (2). One end of the oil tank (2) is provided with a fan (9) for generating airflow inside the rubber tube (3).

2. The high-efficiency heat-dissipating oil-immersed transformer according to claim 1, characterized in that: Both ends of the rubber tube (3) are provided with fixed baffles (5), which are connected to the bottom of the inner wall of the connecting tube (4) so ​​that the bottom of the inner wall of the connecting tube (4) is sealed. A liquid level detection sensor (8) is provided at any end of the rubber tube (3), which is connected to the top of the inner wall of the connecting tube (4) and the detection end of the liquid level detection sensor (8) faces downward.

3. The high-efficiency heat-dissipating oil-immersed transformer according to claim 2, characterized in that: A movable baffle (6) is rotatably connected to the fixed baffle (5). When the movable baffle (6) rotates to the top of the connecting pipe (4), the port of the connecting pipe (4) is sealed by the fixed baffle (5) and the movable baffle (6).

4. The high-efficiency heat-dissipating oil-immersed transformer according to claim 3, characterized in that, The fixed baffle (5) and the movable baffle (6) are sealed together on opposite sides. When the movable baffle (6) rotates to the top of the connecting pipe (4), there is an overlapping part (601) between the fixed baffle (5) and the movable baffle (6).

5. The high-efficiency heat-dissipating oil-immersed transformer according to claim 3, characterized in that: Both ends of the rubber tube (3) are provided with drive motors (7), the drive motors (7) are installed in the connecting tube (4), and the output shaft of the drive motors (7) is connected to the movable baffle (6) to drive the movable baffle (6) to rotate.

6. The high-efficiency heat-dissipating oil-immersed transformer according to claim 5, characterized in that: The outer diameter of the drive motor (7) is smaller than the inner diameter of the connecting pipe (4).

7. The high-efficiency heat-dissipating oil-immersed transformer according to claim 5, characterized in that: The drive motor (7) has a first support frame (71) on its outer side, and the drive motor (7) is connected to the connecting pipe (4) through the first support frame (71).

8. The high-efficiency heat-dissipating oil-immersed transformer according to claim 2, characterized in that: The liquid level detection sensor (8) is provided with a second support frame (81), and the liquid level detection sensor (8) is connected to the connecting pipe (4) through the second support frame (81).

9. The high-efficiency heat-dissipating oil-immersed transformer according to claim 1, characterized in that: The top of the oil tank (2) is provided with an oil injection pipe (22), which is connected to the interior of the oil tank (2) and is used to inject insulating oil into the oil tank (2).

10. The high-efficiency heat-dissipating oil-immersed transformer according to claim 1, characterized in that: A radiator (11) is provided on the outside of the transformer housing (1), and the radiator (11) is connected to the inside of the transformer housing (1).

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