Three-dimensional roll iron core transformer

Abstract

The utility model relates to the technical field of transformers, in particular to a three-dimensional roll iron core transformer which comprises a transformer body, a cooling mechanism and a connecting mechanism, the transformer body is provided with an oil inlet pipe, an oil outlet pipe and an exhaust pipe, and the cooling mechanism is arranged on the transformer body. The cooling mechanism comprises a first supporting plate, a second supporting plate, a heat dissipation plate, a heat dissipation pipe and a water pump, the first supporting plate and the second supporting plate are both welded to the outer surface of the transformer body, the heat dissipation plate is welded to the top of the first supporting plate, the heat dissipation pipe is arranged at the top of the first supporting plate and abuts against the heat dissipation pipe, and the water pump is arranged at the top of the second supporting plate; the radiating pipe is communicated with the oil inlet pipe through a connecting pipe and a connecting mechanism, the other end of the radiating pipe is communicated with an oil outlet pipe of the water pump, and a water inlet of the water pump is communicated with the oil outlet pipe. The transformer is provided with the cooling mechanism, insulating oil in the transformer can be rapidly cooled, and the situation that the transformer cannot work normally due to the fact that the internal temperature is too high when the transformer works is avoided.

Description

Technical Field

[0001] This application relates to the technical field of transformers, and particularly to a three-dimensional wound core transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). Its main functions include: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc.; transformers are basic equipment for power transmission and distribution and are widely used in industries, agriculture, transportation, urban communities, and other fields.

[0003] Currently, a Chinese utility model patent with a publication date of May 10, 2024, and a publication number of CN220933877U provides a triangular three-dimensional wound core transformer for new energy, including a triangular three-dimensional wound core. The triangular three-dimensional wound core is composed of three completely identical core frames joined together, and each core frame is formed by alternately winding a number of trapezoidal amorphous alloy strips and silicon steel strip. Given the characteristics of low loss of amorphous alloy cores and low noise of silicon steel cores, the triangular three-dimensional wound core transformer provided by this utility model has low no-load loss and low noise, reducing the waste of electric energy.

[0004] A triangular three-dimensional wound core transformer in related technologies does not have a device for assisting the transformer to dissipate heat. Since the transformer generates a large amount of heat during operation, especially during peak electricity consumption periods, especially in summer, the transformer generates a lot of heat and is not easy to dissipate heat. The high temperature inside the transformer may cause the transformer to malfunction or even pose a safety hazard. Summary of the Utility Model

[0005] The embodiments of this application provide a three-dimensional wound core transformer, which can improve the technical problem of poor heat dissipation performance of the transformer existing in related technologies.

[0006] An embodiment of the present application provides a three-dimensional wound core transformer, comprising: a transformer body, a cooling mechanism and a connecting mechanism. An oil inlet pipe, an oil outlet pipe and an exhaust pipe are provided on the transformer body. The oil inlet pipe, the oil outlet pipe and the exhaust pipe are integrally formed with the transformer body. A first sealing cover is threadedly connected to the exhaust pipe. The cooling mechanism is provided on the transformer body. The cooling mechanism includes a first support plate, a second support plate, a heat dissipation plate, a heat dissipation pipe and a water pump. The first support plate and the second support plate are both welded to the outer surface of the transformer body. The heat dissipation plate is welded to the top of the first support plate. The heat dissipation pipe is arranged on the top of the first support plate and abuts against the heat dissipation plate. The water pump is arranged on the top of the second support plate. One end of the heat dissipation pipe is communicated with the oil inlet pipe through a connecting pipe and the connecting mechanism. The other end of the heat dissipation pipe is communicated with the oil outlet pipe of the water pump through a connecting pipe. The water inlet of the water pump is communicated with the oil outlet pipe through a connecting pipe.

[0007] In the above technical solution of the embodiment of the present application, at least the following technical effects are achieved: When it is necessary to fill insulating oil into the transformer body, the staff can open the oil inlet pipe and unscrew the first sealing cover from the exhaust pipe, and then fill insulating oil through the oil inlet pipe. As the liquid level of the insulating oil rises, the insulating oil discharges the air inside the transformer body from the exhaust pipe. When the insulating oil is filled to a certain height, the oil inlet pipe can be closed and the first sealing cover can be screwed on. Since the transformer generates a large amount of heat during operation, especially in the peak electricity consumption period, especially in summer, the transformer generates a lot of heat and is not easy to dissipate heat. At this time, the staff can turn on the water pump switch. The water pump extracts insulating oil from the transformer body through the oil outlet pipe and continuously pumps the insulating oil into the heat dissipation pipe. The heat in the insulating oil at a higher temperature is transferred to the heat dissipation pipe and then further transferred to the heat dissipation plate. The heat dissipation pipe and the heat dissipation plate have good heat conduction performance and a large heat dissipation area, which can accelerate the heat dissipation of the insulating oil. The insulating oil after heat dissipation then enters the transformer body through the oil inlet to form a cooling cycle, which can prevent the transformer from being unable to work properly or even having potential safety hazards due to internal high temperature.

[0008] A three-dimensional wound core transformer provided by an embodiment of the present application is provided with a cooling mechanism, which can quickly dissipate the heat of the insulating oil inside the transformer and prevent the transformer from being unable to work properly due to excessive internal temperature during operation.

[0009] In some embodiments, the cooling mechanism further includes a third support plate and a cooling fan. The third support plate is welded to the outer surface of the transformer body. The cooling fan is arranged at the bottom of the third support plate.

[0010] In some embodiments, a plurality of heat dissipation fins are provided on both the heat dissipation plate and the outer surface of the transformer body.

[0011] In some embodiments, the connecting mechanism includes a connecting head and a fixing ring. One end of the oil inlet pipe away from the transformer body is provided with a thread. The fixing ring is sleeved on the connecting head and rotatably connected to the connecting head. One end of the fixing ring is provided with a thread and is threadedly connected to the oil inlet pipe. The other end of the fixing ring abuts against the connecting head, and one end of the connecting head close to the transformer body abuts against the oil inlet pipe.

[0012] In some embodiments, an observation port is provided on the outer surface of the transformer body. A transparent baffle is arranged inside the observation port. A sewage pipe is further arranged at the bottom of the transformer body. One end of the sewage pipe away from the transformer body is threadedly connected with a second sealing cover.

[0013] In some embodiments, an oil extraction hole is provided at the bottom of the transformer body. A plugging assembly is further arranged on the transformer body. The plugging assembly includes a piston tube, a piston, a spring and a push rod. The piston tube is arranged on the inner surface of the transformer body. An opening is provided on the piston tube. The piston is slidably connected inside the piston tube. The spring is arranged inside the piston tube. One end of the spring abuts against the piston tube, and the other end of the spring abuts against the piston. One end of the push rod passes through the oil extraction hole and is fixedly connected to the bottom of the piston.

[0014] In some embodiments, an installation base is arranged at the bottom of the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic diagram of the overall structure of a three-dimensional wound-core transformer provided by an embodiment of the present application Figure 1 ;

[0017] Figure 2 It is Figure 1 an enlarged view of part A;

[0018] Figure 3 It is a schematic diagram of the overall structure of a three-dimensional wound-core transformer provided by an embodiment of the present application Figure 2 ;

[0019] Figure 4 It is Figure 3 an enlarged view of part B;

[0020] Figure 5 It is Figure 3 an enlarged view of part C;

[0021] Figure 6 Cross-sectional view of the connecting mechanism and the inlet oil pipe;

[0022] Figure 7 Cross-sectional view of the plugging assembly.

[0023] Among them, the reference numerals in the figure:

[0024] 1. Transformer body; 11. Inlet oil pipe; 12. Outlet oil pipe; 13. Exhaust pipe; 131. First sealing cover; 14. Observation port; 15. Transparent baffle; 16. Drain pipe; 161. Second sealing cover; 17. Oil extraction hole; 21. First support plate; 22. Second support plate; 23. Heat dissipation plate; 24. Heat dissipation pipe; 25. Water pump; 26. Third support plate; 27. Cooling fan; 3. Connecting mechanism; 31. Connector; 32. Fixed ring; 4. Heat sink; 51. Piston tube; 52. Piston; 53. Spring; 54. Push rod; 511. Opening; 6. Installation base. Specific embodiments

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0027] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc.; transformers are basic equipment for power transmission and distribution and are widely used in industries, agriculture, transportation, urban communities and other fields.

[0028] A triangular three-dimensional wound-core transformer dedicated to new energy in the related art, with the publication number CN220933877U, includes a triangular three-dimensional wound core. The triangular three-dimensional wound core is composed of three identical core frames assembled together. Each core frame is formed by alternately winding a number of trapezoidal amorphous alloy strips and silicon steel strip laminations. In view of the characteristics of low loss of amorphous alloy cores and low noise of silicon steel strip cores, the triangular three-dimensional wound-core transformer provided by this utility model has low no-load loss and low noise, reducing the waste of electric energy.

[0029] However, a triangular three-dimensional wound-core transformer dedicated to new energy in the related art is not provided with a device for assisting the heat dissipation of the transformer. Since the transformer generates a large amount of heat during operation, especially in the peak electricity consumption period, especially in summer, the transformer generates a lot of heat and is not easy to dissipate heat. The high temperature inside the transformer may cause the transformer to fail to work properly or even pose a safety hazard.

[0030] Based on this, to improve the problem of poor heat dissipation performance of the transformer in the related art, the embodiments of the present application provide the following solutions.

[0031] Please refer to Figures 1 to 6 together. The embodiments of the present application provide a three-dimensional wound-core transformer, including a transformer body 1, a cooling mechanism, and a connecting mechanism 3.

[0032] Please refer to Figures 1 to 6, an oil inlet pipe 11, an oil outlet pipe 12 and an exhaust pipe 13 are provided on the transformer body 1. The oil inlet pipe 11, the oil outlet pipe 12 and the exhaust pipe 13 are integrally formed with the transformer body 1. A first sealing cover 131 is threadedly connected to the exhaust pipe 13. The cooling mechanism is provided on the transformer body 1. The cooling mechanism includes a first support plate 21, a second support plate 22, a heat dissipation plate 23, a heat dissipation pipe 24, a water pump 25, a third support plate 26 and a cooling fan 27. The first support plate 21, the second support plate 22 and the third support plate 26 are all welded to the outer surface of the transformer body 1. The heat dissipation plate 23 is welded to the top of the first support plate 21. A plurality of heat dissipation fins 4 are provided on the heat dissipation plate 23 and on the outer surface of the transformer body 1. The heat dissipation pipe 24 is arranged on the top of the first support plate 21 and abuts against the heat dissipation plate 23. The water pump 25 is arranged on the top of the second support plate 22. One end of the heat dissipation pipe 24 is communicated with the oil inlet pipe 11 through a connecting pipe and a connecting mechanism 3. The other end of the heat dissipation pipe 24 is communicated with the water outlet of the water pump 25 through a connecting pipe. The water inlet of the water pump 25 is communicated with the oil outlet pipe 12 through a connecting pipe. The cooling fan 27 is arranged at the bottom of the third support plate 26. The connecting mechanism 3 includes a connecting head 31 and a fixing ring 32. The end of the oil inlet pipe 11 away from the transformer body 1 is provided with threads. The fixing ring 32 is sleeved on the connecting head 31 and is rotatably connected to the connecting head 31. One end of the fixing ring 32 is provided with threads and is threadedly connected to the oil inlet pipe 11. The other end of the fixing ring 32 abuts against the connecting head 31. The end of the connecting head 31 close to the transformer body 1 abuts against the oil inlet pipe 11. An observation port 14 is further opened on the outer surface of the transformer body 1. A transparent baffle 15 is arranged inside the observation port 14. An installation base 6 is arranged at the bottom of the transformer body 1.

[0033] As can be seen from the above, for a three-dimensional wound-core transformer provided by an embodiment of the present application, since insulating oil needs to be filled into the transformer body 1 during assembly, the staff can turn the fixing ring 32 to separate the fixing ring 32 and the connecting head 31 from the oil inlet pipe 11, then unscrew the first sealing cover 131 from the exhaust pipe 13, and then fill the insulating oil into the transformer body 1 through the oil inlet pipe 11. As the liquid level of the insulating oil rises, the insulating oil will discharge the air inside the transformer body 1 from the exhaust pipe 13. The staff can observe the height of the insulating oil liquid level through the transparent baffle 15. When the insulating oil liquid level reaches a certain height, stop filling the oil and screw on the first sealing cover 131, and then turn the fixing ring 32 to make the connecting head 31 abut against the oil inlet pipe 11 to form a seal. After that, the staff can fix the transformer body 1 on the transformer support through the mounting base 6, thus completing the installation of the transformer; since a large amount of heat is generated when the transformer is working, especially in summer during the peak electricity consumption period, the transformer generates a lot of heat and is not easy to dissipate heat. At this time, the staff can turn on the cooling mechanism. The water pump 25 extracts the insulating oil from the transformer body 1 through the oil outlet pipe 12 and continuously pumps the insulating oil into the heat dissipation pipe 24. The heat in the insulating oil at a higher temperature is transferred to the heat dissipation pipe 24, and then continues to be transferred to the heat dissipation plate 23 and the heat dissipation fins 4. The heat dissipation plate 23 and the heat dissipation fins 4 have good heat conduction performance and a large heat dissipation area, and can quickly dissipate heat to the surrounding air. The cooling fan 27 continuously blows air to the heat dissipation plate 23 and the heat dissipation fins 4, so that the hot air around the heat dissipation plate 23 and the heat dissipation fins 4 can be blown into the air around the transformer, thereby accelerating the heat dissipation of the insulating oil. After being cooled, the insulating oil enters the transformer body 1 through the oil inlet pipe 11 to form a cooling cycle, which can prevent the transformer from failing to work properly or even having potential safety hazards due to internal high temperature.

[0034] In some embodiments, please also refer to Figures 3 to 7 , a drain pipe 16 is further provided at the bottom of the transformer body 1. One end of the drain pipe 16 away from the transformer body 1 is threadedly connected with a second sealing cover 161. An oil extraction hole 17 is further opened at the bottom of the transformer body 1. A plugging assembly is provided on the transformer body 1. The plugging assembly includes a piston tube 51, a piston 52, a spring 53 and a push rod 54. The piston tube 51 is arranged on the inner surface of the transformer body 1. An opening 511 is opened on the piston tube 51. The piston 52 is slidably connected inside the piston tube 51. The spring 53 is arranged inside the piston tube 51. One end of the spring 53 abuts against the piston tube 51, and the other end of the spring 53 abuts against the piston 52. One end of the push rod 54 passes through the oil extraction hole 17 and is fixedly connected to the bottom of the piston 52.

[0035] With such a setting, the insulating oil inside the transformer body 1 will gradually deteriorate after the transformer has been working for a long time. The deterioration of the insulating oil will cause the insulating performance and heat dissipation performance of the insulating oil to decline, thus affecting the normal operation of the transformer. The staff can regularly detect the insulating oil inside the transformer body 1. When performing the detection work, the staff can push the push rod 54 into the transformer body 1. The push rod 54 will push the piston 52 to compress the spring 53 and move upward, thereby opening the opening 511. The insulating oil inside the transformer body 1 will flow into the piston tube 51 through the opening 511 and continue to flow out of the transformer through the oil extraction hole 17. The staff can use a container to collect the flowing insulating oil. After the oil extraction work is completed, the staff can release the push rod 54. The piston 52 slides downward under the thrust of the spring 53 until its bottom abuts against the transformer body 1 to form a seal. At this time, the outer peripheral surface of the piston 52 will block the opening 511 to prevent the insulating oil from continuing to flow into the piston tube 51. Then the staff can detect the small amount of insulating oil taken out to judge whether it can no longer be used due to deterioration. If the insulating oil can no longer be used, the staff can unscrew the second sealing cover 161 from the sewage pipe 16. The insulating oil inside the transformer body 1 will be discharged to the outside of the transformer through the sewage pipe 16. After the insulating oil is discharged, the staff can screw the second sealing cover 161 back to its original position and fill new insulating oil through the oil inlet pipe 11, so as to ensure the long-term stable operation of the transformer.

[0036] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-dimensional wound core transformer, characterized in that: It includes a transformer body (1), a cooling mechanism, and a connecting mechanism (3). An oil inlet pipe (11), an oil outlet pipe (12), and an exhaust pipe (13) are provided on the transformer body (1). The oil inlet pipe (11), the oil outlet pipe (12), and the exhaust pipe (13) are integrally formed with the transformer body (1). A first sealing cover (131) is threadedly connected to the exhaust pipe (13). The cooling mechanism is provided on the transformer body (1). The cooling mechanism includes a first support plate (21), a second support plate (22), a heat dissipation plate (23), a heat dissipation pipe (24), and a water pump (25). The first support plate (21) and the second support plate (22) are both welded to the outer surface of the transformer body (1). The heat dissipation plate (23) is welded to the top of the first support plate (21). The heat dissipation pipe (24) is arranged on the top of the first support plate (21) and abuts against the heat dissipation plate (23). The water pump (25) is arranged on the top of the second support plate (22). One end of the heat dissipation pipe (24) is communicated with the oil inlet pipe (11) through a connecting pipe and the connecting mechanism (3). The other end of the heat dissipation pipe (24) is communicated with the water outlet of the water pump (25) through a connecting pipe. The water inlet of the water pump (25) is communicated with the oil outlet pipe (12) through a connecting pipe.

2. The three-dimensional wound core transformer according to claim 1, wherein: The cooling mechanism further includes a third support plate (26) and a cooling fan (27). The third support plate (26) is welded to the outer surface of the transformer body (1). The cooling fan (27) is arranged at the bottom of the third support plate (26).

3. The three-dimensional wound core transformer according to claim 2, wherein: A plurality of heat dissipation fins (4) are provided on both the heat dissipation plate (23) and the outer surface of the transformer body (1).

4. A three-dimensional wound core transformer according to claim 1, characterized in that: The connecting mechanism (3) includes a connecting head (31) and a fixing ring (32). One end of the oil inlet pipe (11) away from the transformer body (1) is provided with threads. The fixing ring (32) is sleeved on the connecting head (31) and is rotatably connected to the connecting head (31). One end of the fixing ring (32) is provided with threads and is threadedly connected to the oil inlet pipe (11). The other end of the fixing ring (32) abuts against the connecting head (31). One end of the connecting head (31) close to the transformer body (1) abuts against the oil inlet pipe (11).

5. A three-dimensional wound core transformer according to any one of claims 1-4, characterized in that: An observation port (14) is provided on the outer surface of the transformer body (1). A transparent baffle (15) is arranged inside the observation port (14). A sewage discharge pipe (16) is further provided at the bottom of the transformer body (1). A second sealing cover (161) is threadedly connected to one end of the sewage discharge pipe (16) away from the transformer body (1).

6. The three-dimensional wound core transformer according to claim 5, wherein: An oil extraction hole (17) is provided at the bottom of the transformer body (1), and a plugging assembly is further provided on the transformer body (1). The plugging assembly includes a piston tube (51), a piston (52), a spring (53), and a push rod (54). The piston tube (51) is arranged on the inner surface of the transformer body (1). An opening (511) is provided on the piston tube (51). The piston (52) is slidably connected inside the piston tube (51). The spring (53) is arranged inside the piston tube (51). One end of the spring (53) abuts against the piston tube (51), and the other end of the spring (53) abuts against the piston (52). One end of the push rod (54) passes through the oil extraction hole (17) and is fixedly connected to the bottom of the piston (52).

7. A three-dimensional wound-core transformer according to claim 6, characterized in that: An installation base (6) is provided at the bottom of the transformer body (1).

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