Dustproof structure of non-closed oil-immersed transformer

Abstract

The invention discloses a non-closed type oil-immersed transformer dustproof structure which comprises a transformer body, four cooling fins are fixedly connected to the inner wall of the transformer body, one side of each cooling fin penetrates through and extends to the outer side of the transformer body, the top of the transformer body communicates with an oil conservator, and the oil conservator communicates with the transformer body. A breather is communicated with the oil conservator, one side of each heat dissipation fin is fixedly connected with a heat conduction plate, the heat conduction plates are arranged in an L shape, and a fixing ring is fixedly connected to the top of the transformer body. According to the transformer oil cooling device, effective dustproof treatment can be conducted on the cooling fins through cooperation of the heat conduction plate and the filter plate, the cooling effect of the cooling fins on transformer oil can be improved through cooperation of the heat conduction plate and the filter plate, the self-cleaning effect on the filter plate can be achieved, and the manual maintenance cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-immersed transformers, and more specifically, to a dust-proof structure for a non-enclosed oil-immersed transformer. Background Art

[0002] The non-enclosed oil-immersed transformer is a common type of power transformer. Its core features lie in the oil-immersed cooling method and the non-enclosed structure design. The transformer oil tank is not completely sealed, and there is a certain air exchange with the outside world (such as through a breather or an oil conservator), and the oil surface is in contact with the air.

[0003] When the oil-immersed transformer is in use, heat dissipation fins are used to cool the transformer oil in the transformer housing. The heat dissipation fins are usually exposed to the air, and dust in the air is easily attached to the surface of the heat dissipation fins, thereby affecting the heat dissipation effect of the heat dissipation fins on the transformer oil. Moreover, there is a lack of a filtering mechanism at the bottom of the breather. After the dust in the air enters the breather, it will contaminate the silica gel for water absorption, thereby affecting the use effect and service life of the silica gel for water absorption. Therefore, a dust-proof structure for a non-enclosed oil-immersed transformer is needed. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a dust-proof structure for a non-enclosed oil-immersed transformer to solve the problems in the background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A dust-proof structure for a non-enclosed oil-immersed transformer includes a transformer main body. Four heat dissipation fins are fixedly connected to the inner wall of the transformer main body. One side of each of the four heat dissipation fins penetrates and extends to the outside of the transformer main body. An oil conservator is communicated with the top of the transformer main body. A breather is communicated with the oil conservator. One side of each of the four heat dissipation fins is fixedly connected with a heat conducting plate. The shape of the heat conducting plate is L-shaped. A fixing ring is fixedly connected to the top of the transformer main body. Four cavities are opened in the fixing ring. Three fans are embedded in the inner top walls of the four cavities respectively. Air extraction grooves are opened in the inner bottom walls of the four cavities respectively. Through grooves are opened in each of the four heat conducting plates. Four mounting frames are fixedly connected to the outside of the fixing ring. One side of each of the four mounting frames is fixedly connected with an electric push rod I. The telescopic ends of the four electric push rods I are fixedly connected with sliding plates respectively. One side of each of the four sliding plates slides with one of the four heat conducting plates respectively. Filter plates are fixedly connected to the tops of the four sliding plates respectively. One side of each of the four filter plates is in contact with one of the four heat conducting plates respectively. Two mounting blocks are fixedly connected to one side of each of the four heat conducting plates respectively. A cleaning brush is fixedly connected between adjacent two mounting blocks.

[0006] As a further description of the above technical solution: Above the transformer body, a guiding cover is provided. The bottom of the guiding cover is fixedly connected to four mounting frames respectively, and an air outlet is formed at the top of the guiding cover.

[0007] As a further description of the above technical solution: An electric push rod II is fixedly connected to the top of the transformer body. The telescopic end of the electric push rod II is fixedly connected to a sealing plate, and the size of the sealing plate is adapted to the air outlet.

[0008] As a further description of the above technical solution: A controller is installed at the bottom of the sealing plate. The output ends of the controller are respectively in signal connection with the fan, the electric push rod I and the electric push rod II.

[0009] As a further description of the above technical solution: A pressure sensor is installed on the inner wall of the cavity. The output end of the pressure sensor is in signal connection with the controller.

[0010] As a further description of the above technical solution: A ring is sleeved on the bottom of the breather and is threadedly connected thereto. The bottom of the ring is fixedly connected to a cylinder body. A piston plate is slidably connected to the inner wall of the cylinder body. An air inlet and outlet pipe is inserted through the piston plate and is fixedly connected thereto. An electromagnetic valve is installed on the air inlet and outlet pipe. A filter cylinder is sleeved at the bottom end of the air inlet and outlet pipe and is fixedly connected thereto. Annularly distributed mounting strips are fixedly connected to the inner side of the cylinder body. An installation ring is arranged on the inner wall of the cylinder body. The outer side of the installation ring is fixedly connected to the mounting strips. A cleaning strip is fixedly connected to the inner side of the installation ring. The shape of the cleaning strip is annular.

[0011] As a further description of the above technical solution: A sealing ring is sleeved on the bottom of the breather and is fixedly connected thereto. A sealing gasket is fixedly connected to the bottom of the sealing ring.

[0012] Compared with the prior art, the advantages of the present invention are as follows: In this solution, the cooperation of the heat conducting plate and the filter plate can effectively perform dust prevention treatment on the heat dissipation fins, and the cooperation with the fan can improve the heat dissipation effect of the heat dissipation fins on the transformer oil, and can achieve the effect of self-cleaning of the filter plate, effectively reducing the manual maintenance cost; The air discharged by the fan can form multiple air curtains at the top of the transformer, thereby realizing the dust prevention effect on structures such as the terminal blocks at the top of the transformer, effectively avoiding the influence of dust on the use of the transformer, and the air curtains can also play an auxiliary cleaning effect on the filter plate; A filtering structure is added to the bottom of the respirator to prevent dust in the air from causing damage to the water-absorbing silica gel in the respirator. Moreover, by using the air discharged from the oil conservator as power, the self-cleaning effect of the filter cartridge can be achieved. Description of the Drawings

[0013] Figure 1 The first perspective view of the present invention; Figure 2 The second perspective view of the present invention; Figure 3 The perspective view of the transformer body in the present invention; Figure 4 The perspective view of the present invention when backwashing and cleaning the two filter plates on the front and back; Figure 5 The cross-sectional view of the cylinder block in the present invention; Figure 6 The position relationship diagram of the filter cartridge and the cleaning strip in the present invention; Figure 7 The partial cross-sectional perspective view of the fixing ring in the present invention.

[0014] Explanation of the reference numerals in the drawings: 1. Transformer body; 2. Heat dissipation fins; 3. Oil conservator; 4. Respirator; 5. Heat conducting plate; 6. Fixing ring; 7. Cavity; 8. Fan; 9. Air extraction groove; 10. Through groove; 11. Installation frame; 12. Electric push rod 1; 13. Slide plate; 14. Filter plate; 15. Installation block; 16. Cleaning brush; 17. Guide cover; 18. Air outlet; 19. Electric push rod 2; 20. Sealing plate; 21. Controller; 22. Air pressure sensor; 23. Ring; 24. Cylinder block; 25. Piston plate; 26. Inlet and outlet pipe; 27. Solenoid valve; 28. Filter cartridge; 29. Installation strip; 30. Installation ring; 31. Cleaning strip; 32. Sealing ring; 33. Sealing gasket. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention; Please refer to Figures 1 to 7, in the present invention: a dust-proof structure for a non-closed oil-immersed transformer, comprising a transformer main body 1, four heat dissipation fins 2 are fixedly connected to the inner wall of the transformer main body 1, and one side of each of the four heat dissipation fins 2 penetrates and extends to the outside of the transformer main body 1. An oil conservator 3 is communicated with the top of the transformer main body 1, a breather 4 is communicated with the oil conservator 3, a heat conduction plate 5 is fixedly connected to one side of each of the four heat dissipation fins 2, the shape of the heat conduction plate 5 is arranged in an L shape, a fixing ring 6 is fixedly connected to the top of the transformer main body 1, four cavities 7 are opened on the fixing ring 6, three fans 8 are embedded in the inner top walls of the four cavities 7 respectively, air extraction grooves 9 are opened on the inner bottom walls of the four cavities 7 respectively, through grooves 10 are opened on each of the four heat conduction plates 5, four mounting frames 11 are fixedly connected to the outside of the fixing ring 6, an electric push rod 12 is fixedly connected to one side of each of the four mounting frames 11, a sliding plate 13 is fixedly connected to the telescopic end of each of the four electric push rods 12, one side of each of the four sliding plates 13 slides on each of the four heat conduction plates 5 respectively, a filter plate 14 is fixedly connected to the top of each of the four sliding plates 13, one side of each of the four filter plates 14 is in contact with each of the four heat conduction plates 5 respectively, two mounting blocks 15 are fixedly connected to one side of each of the four heat conduction plates 5, and a cleaning brush 16 is fixedly connected between adjacent two mounting blocks 15.

[0016] In the present invention, during the use process, the heat dissipation fins 2 are used to dissipate heat from the transformer oil inside the transformer main body 1, and the heat conduction plates 5 can perform dust-proof treatment on the heat dissipation fins 2, effectively avoiding the situation that dust in the air adheres to the surface of the heat dissipation fins 2, thereby maintaining the heat dissipation effect of the heat dissipation fins 2. At the same time, when the fans 8 are turned on, the fans 8 will draw air into the inside of the heat dissipation fins 2 through the through grooves 10, and then the air will flow among the heat dissipation fins 2, the heat conduction plates 5 and the transformer main body 1, and then the air will enter the cavities 7 from the air extraction grooves 9 and be discharged to the top of the transformer main body 1 through the fans 8. During the flowing process of the air, the temperature on the surface of the heat dissipation fins 2 can be taken away, thereby improving the effect of cooling the transformer oil in the transformer main body 1. Moreover, before the air contacts the heat dissipation fins 2, the air will be filtered by the filter plates 14, thereby effectively avoiding the situation that dust in the air pollutes the heat dissipation fins 2.

[0017] After a period of use, the surface of the filter plate 14 is easily blocked by dust, which affects the air flow. First, turn off the fan 8 above the filter plate 14 to be cleaned, and then turn on the first electric push rod 12 on the side close to the filter plate 14. The first electric push rod 12 will drive the sliding plate 13 to rise. During the rising process of the sliding plate 13, the filter plate 14 will be driven to rise. As the filter plate 14 rises, the filter plate 14 will slide past the cleaning brush 16 between the two mounting blocks 15. At this time, the cleaning brush 16 will sweep away the dust adhering to the surface of the filter plate 14. By controlling the continuous up and down movement of the filter plate 14, the cleaning effect of the filter plate 14 is achieved. During the cleaning process, the sliding plate 13 will seal the through groove 10, thereby avoiding the situation that the swept dust pollutes the heat dissipation fins 2, and improving the dust-proof effect of the device.

[0018] Please refer to Figures 1 to 4 , in which: a guiding cover 17 is arranged above the transformer body 1. The bottom of the guiding cover 17 is fixedly connected to four mounting frames 11 respectively, and an air outlet 18 is opened at the top of the guiding cover 17.

[0019] In the present invention, the guiding cover 17 can play a role in protecting the transformer body 1. Rainwater will fall along the guiding cover 17, reducing the damage caused by rainwater to the transformer body 1. The air discharged by the fan 8 will flow out from the air outlet 18. During the process of air discharge, the situation that rainwater falls into the top of the transformer body 1 from the air outlet 18 can be reduced, improving the protection effect on the transformer body 1.

[0020] Moreover, the setting of the guiding cover 17 can guide the air blown by the fan 8. The air will flow from the periphery of the fixed ring 6 to the air outlet 18. During the flowing process of the air, four air curtains will be formed on the top of the transformer body 1. The air curtains can effectively prevent the outside dust from falling on the top of the transformer body 1, thereby realizing the dust-proof treatment of the terminal structure and other structures on the top of the transformer body 1, and reducing the influence of dust on the operation of the transformer body 1, improving the stability of the device operation.

[0021] Please refer to Figure 3 and 4 , in which: the top of the transformer body 1 is fixedly connected to a second electric push rod 19. The telescopic end of the second electric push rod 19 is fixedly connected to a sealing plate 20, and the size of the sealing plate 20 is adapted to the air outlet 18.

[0022] In the present invention, when cleaning the filter plate 14, two opposite filter plates 14 can be selected for cleaning at a time. When cleaning the front and back filter plates 14 simultaneously, after the front and back filter plates 14 rise and contact the guiding cover 17, the filter plate 14 will seal the space between the guiding cover 17 on its side and the transformer body 1. At this time, the electric push rod two 19 is activated to drive the sealing plate 20 to rise and seal the air outlet 18. At this time, the air discharged from the fans 8 on the left and right sides cannot be discharged from the air outlet 18, and the air will accumulate on the top of the transformer body 1. Then, the air will pass through the front and back filter plates 14 in the reverse direction. When the air passes through the filter plate 14 in the reverse direction, the air can achieve the effect of backwashing and cleaning the filter plate 14, thereby effectively improving the cleaning effect of the filter plate 14 and enhancing the practicality of the device.

[0023] Please refer to Figure 3 , wherein: a controller 21 is installed at the bottom of the sealing plate 20, and the output terminals of the controller 21 are respectively connected to the fan 8, the electric push rod one 12, and the electric push rod two 19 in a signal connection.

[0024] In the present invention, the setting of the controller 21 can facilitate the control of the opening and closing of the fan 8, the electric push rod one 12, and the electric push rod two 19, thereby enhancing the practicality of the device.

[0025] Please refer to Figure 7 , wherein: a pressure sensor 22 is installed on the inner wall of the cavity 7, and the output terminal of the pressure sensor 22 is connected to the controller 21 in a signal connection.

[0026] In the present invention, the setting of the pressure sensor 22 can detect the air pressure in the cavity 7. If dust adheres to the surface of the filter plate 14, the air entering the cavity 7 will be affected, and the air pressure in the cavity 7 will decrease. By observing the value of the pressure sensor 22, it can be determined whether the filter plate 14 needs to be cleaned, and thus the filter plate 14 can be cleaned in a timely manner.

[0027] Please refer to Figure 5 , wherein: a ring 23 threadedly connected to the respirator 4 is sleeved at the bottom of the respirator 4. The bottom of the ring 23 is fixedly connected to a cylinder body 24. A piston plate 25 is slidably connected to the inner wall of the cylinder body 24. An air inlet and outlet pipe 26 fixedly connected to the piston plate 25 is inserted through the piston plate 25. An electromagnetic valve 27 is installed on the air inlet and outlet pipe 26. A filter cartridge 28 fixedly connected to the air inlet and outlet pipe 26 is sleeved at the bottom end of the air inlet and outlet pipe 26. Annularly distributed mounting strips 29 are fixedly connected to the inner side of the cylinder body 24. An installation ring 30 is arranged on the inner wall of the cylinder body 24. The outer side of the installation ring 30 is fixedly connected to the mounting strips 29. A cleaning strip 31 is fixedly connected to the inner side of the installation ring 30. The shape of the cleaning strip 31 is annular.

[0028] In the present invention, when the air in the oil conservator 3 exchanges with the outside air through the breather 4, the air enters and exits from the bottom of the breather 4. When the air flows into the interior of the breather 4, the air passes through the filter cartridge 28 and enters the inlet and outlet air pipe 26. Then, the air flows into the breather 4 between the piston plate 25 and the cylinder block 24. The breather 4 adsorbs the moisture in the air, and then the air flows into the oil conservator 3 for air replenishment. When the air enters the interior of the filter cartridge 28, the filter cartridge 28 filters the dust in the air, thereby effectively avoiding the situation that the silica gel for water absorption in the breather 4 is contaminated by dust in the air, and further improving the service life of the breather 4.

[0029] When dust is likely to adhere to the surface of the filter cartridge 28 after long-term use, affecting the smoothness of the air entering the breather 4, when the oil conservator 3 discharges air outward, the solenoid valve 27 is closed. At this time, the inlet and outlet air pipe 26 will be closed, and the air discharged from the breather 4 will gather in the cylinder block 24. Then, the air will push the piston plate 25 to descend. After the piston plate 25 descends, it will drive the filter cartridge 28 to descend. The filter cartridge 28 will then pass through the cleaning strip 31, and the cleaning strip 31 will scrape off the dust adhering to the surface of the filter cartridge 28, thereby achieving the self-cleaning effect of the filter cartridge 28, and using the air discharged from the oil conservator 3 as power to achieve the self-cleaning effect of the filter cartridge 28.

[0030] Please refer to Figure 5 , wherein: a sealing ring 32 fixedly connected thereto is sleeved on the bottom of the breather 4, and a sealing ring 33 is fixedly connected to the bottom of the sealing ring 32.

[0031] In the present invention, the arrangement of the sealing ring 33 and the sealing ring 32 can improve the sealing effect between the cylinder block 24 and the breather 4, and further improve the stability of the air pushing the piston plate 25 to slide, and avoid the situation of air leakage and malfunction.

[0032] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. A dust-proof structure for a non-hermetic oil-immersed transformer, comprising a transformer main body (1), characterized in that: Four heat dissipation fins (2) are fixedly connected to the inner wall of the transformer body (1). One side of each of the four heat dissipation fins (2) penetrates and extends to the outside of the transformer body (1). An oil conservator (3) is communicated with the top of the transformer body (1). A breather (4) is communicated with the oil conservator (3). A heat conducting plate (5) is fixedly connected to one side of each of the four heat dissipation fins (2). The shape of the heat conducting plate (5) is arranged in an L shape. A fixing ring (6) is fixedly connected to the top of the transformer body (1). Four cavities (7) are opened on the fixing ring (6). Three fans (8) are embedded in the inner top walls of the four cavities (7). Air extraction grooves (9) are opened on the inner bottom walls of the four cavities (7). Through grooves (10) are opened on each of the four heat conducting plates (5). Four mounting frames (11) are fixedly connected to the outside of the fixing ring (6). An electric push rod one (12) is fixedly connected to one side of each of the four mounting frames (11). The telescopic ends of the four electric push rods one (12) are fixedly connected with sliding plates (13). One side of each of the four sliding plates (13) slides with each of the four heat conducting plates (5). A filter plate (14) is fixedly connected to the top of each of the four sliding plates (13). One side of each of the four filter plates (14) is in contact with each of the four heat conducting plates (5). Two mounting blocks (15) are fixedly connected to one side of each of the four heat conducting plates (5). A cleaning brush (16) is fixedly connected between adjacent two mounting blocks (15).

2. The dust-proof structure of a non-hermetic oil-immersed transformer according to claim 1, characterized in that: A guiding cover (17) is arranged above the transformer body (1). The bottom of the guiding cover (17) is fixedly connected with the four mounting frames (11) respectively. An air outlet (18) is opened on the top of the guiding cover (17).

3. A dust-proof structure for a non-enclosed oil-immersed transformer according to claim 2, characterized in that: An electric push rod two (19) is fixedly connected to the top of the transformer body (1). The telescopic end of the electric push rod two (19) is fixedly connected with a sealing plate (20). The size of the sealing plate (20) is adapted to the air outlet (18).

4. A dust-proof structure for a non-closed oil-immersed transformer according to claim 3, characterized in that: A controller (21) is installed at the bottom of the sealing plate (20). The output end of the controller (21) is respectively in signal connection with the fan (8), the electric push rod one (12) and the electric push rod two (19).

5. A dust-proof structure for a non-enclosed oil-immersed transformer according to claim 4, characterized in that: A pressure sensor (22) is installed on the inner wall of the cavity (7). The output end of the pressure sensor (22) is in signal connection with the controller (21).

6. The dust-proof structure of a non-closed oil-immersed transformer according to claim 1, characterized in that: A ring (23) is sleeved on the bottom of the respirator (4) and is threadedly connected thereto. A cylinder block (24) is fixedly connected to the bottom of the ring (23). A piston plate (25) is slidably connected to the inner wall of the cylinder block (24). An air inlet and outlet pipe (26) fixedly connected thereto is inserted through the piston plate (25). A solenoid valve (27) is installed on the air inlet and outlet pipe (26). A filter cartridge (28) fixedly connected thereto is sleeved on the bottom end of the air inlet and outlet pipe (26). Annularly distributed mounting strips (29) are fixedly connected to the inner side of the cylinder block (24). An installation ring (30) is arranged on the inner wall of the cylinder block (24). The outer side of the installation ring (30) is fixedly connected to the mounting strips (29). A cleaning strip (31) is fixedly connected to the inner side of the installation ring (30). The shape of the cleaning strip (31) is annular.

7. A dust-proof structure for a non-closed oil-immersed transformer according to claim 6, characterized in that: A sealing ring (32) fixedly connected thereto is sleeved on the bottom of the respirator (4). A sealing gasket (33) is fixedly connected to the bottom of the sealing ring (32).

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