Transformer differential protection device

Abstract

The present invention relates to the technical field of differential protection, and discloses a transformer differential protection device, which solves the problem that poor heat dissipation inside the protection device affects the normal operation of electronic components. It includes a differential protection main body and an installation shell. The differential protection main body is fixedly installed on the installation shell. Air outlet holes are respectively opened on the inner walls of both sides of the installation shell. A first filter screen is fixedly connected in the air outlet holes. A rectangular hole is opened on the inner wall of the installation shell. A heat dissipation box adapted to the rectangular hole is fixedly connected to the outer wall of the installation shell. A swing box is arranged in the heat dissipation box. The heat dissipation box is provided with a reciprocating swing structure for driving the swing box to swing. A heat dissipation fan is arranged in the installation shell. The swing box is provided with an angle adjustment mechanism for changing the inclination angle of the heat dissipation fan. Air inlet pipes are respectively fixedly connected to both sides of the heat dissipation box. A sealing sleeve is slidably sleeved on the outside of the air inlet pipe; it can make the heat dissipation inside the installation shell smooth and reduce the influence of temperature on the normal operation of electronic components.

Description

Technical Field

[0001] The invention belongs to the technical field of differential protection, and particularly relates to a transformer differential protection device. Background Art

[0002] A transformer is an important device in the power system. Transformer faults will seriously affect the safe and stable operation of the power system and power supply reliability. The transformer differential protection device is mainly used to protect transformer equipment. The transformer differential protection device should have differential instantaneous protection and complex ratio differential protection with or without second harmonic restraint.

[0003] However, it is worth considering that the protection device is generally designed to be a relatively sealed structure, but this also leads to poor heat dissipation inside the protection device, affecting the normal operation of electronic components and making it inconvenient for popularization and use.

[0004] Therefore, in order to solve the above problems, the emergence of a related facility that more meets the usage requirements is needed. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the invention provides a transformer differential protection device, which effectively solves the problem of poor heat dissipation inside the protection device in the above background art and affects the normal operation of electronic components.

[0006] To achieve the above object, the invention provides the following technical solution: A transformer differential protection device, including a differential protection main body and an installation shell. The differential protection main body is fixedly installed on the installation shell. Air outlet holes are respectively opened on both inner walls of the installation shell. A first filter screen is fixedly connected inside the air outlet holes. A rectangular hole is opened on the inner wall of the installation shell. A heat dissipation box adapted to the rectangular hole is fixedly connected to the outer wall of the installation shell. A swing box is arranged inside the heat dissipation box. The heat dissipation box is provided with a reciprocating swing structure for driving the swing box to swing. A heat dissipation fan is arranged inside the installation shell. The swing box is provided with an angle adjustment mechanism for changing the inclination angle of the heat dissipation fan. Air inlet pipes are respectively fixedly connected to both sides of the heat dissipation box. A sealing sleeve is slidably sleeved outside the air inlet pipe. A second filter screen is fixedly connected inside the sealing sleeve. The heat dissipation box is provided with a cleaning component adapted to the second filter screen.

[0007] Preferably, the reciprocating swing structure includes a first rotating shaft rotatably installed inside the heat dissipation box. The first rotating shaft and the swing box are fixedly connected through a connecting column. A worm gear is fixedly sleeved outside the first rotating shaft. A worm meshing with the worm gear is rotatably connected inside the heat dissipation box. The heat dissipation box is provided with a driving member for driving the worm to rotate.

[0008] Preferably, the driving member includes a first gear fixedly sleeved outside the worm. A servo motor is provided on the outer wall of the heat dissipation box, and the servo motor and the heat dissipation box are connected by a plurality of bolts. The output end of the servo motor is fixedly connected with a second gear located inside the heat dissipation box, and the second gear meshes with the first gear. A first avoidance hole adapted to the second gear is formed on the inner wall of the heat dissipation box.

[0009] Preferably, the angle adjustment mechanism includes a second rotating shaft rotatably installed in the swing box. The second rotating shaft and the heat dissipation fan are fixedly connected by two first connecting plates. Two second avoidance holes adapted to the first connecting plates are formed on the inner wall of the swing box. A first connecting shaft is rotatably connected to the swing box. One end of the first connecting shaft is provided with a transmission unit adapted to the second rotating shaft, and the other end of the first connecting shaft is provided with a synchronous coupler adapted to the first gear.

[0010] Preferably, the synchronous coupler includes a first bevel gear fixedly installed on the first connecting shaft. A second bevel gear is sleeved outside the first rotating shaft, and the second bevel gear is rotatably connected to the heat dissipation box. A second connecting shaft is rotatably connected inside the heat dissipation box. A third bevel gear is fixedly installed on the second connecting shaft, and the third bevel gear and the first bevel gear respectively mesh with the second bevel gear. A third gear meshing with the first gear is fixedly sleeved outside the second connecting shaft.

[0011] Preferably, the transmission unit includes a fourth gear fixedly sleeved outside the second rotating shaft. The first connecting shaft is fixedly installed with a second connecting plate located inside the swing box. The second connecting plate is fixedly installed with a fixed column. A rectangular ring is slidably sleeved outside the fixed column. A toothed plate meshing with the fourth gear is fixedly installed on the rectangular ring. The swing box is provided with a guiding member adapted to the rectangular ring.

[0012] Preferably, the guiding member includes at least one first guiding column fixedly installed in the swing box. A first supporting portion is slidably sleeved outside the first guiding column, and the first supporting portion is fixedly connected with the rectangular ring.

[0013] Preferably, the cleaning assembly includes a fixed block fixedly installed on the second filter screen, and the fixed block is located inside the air inlet pipe. A sliding groove is formed at the bottom of the fixed block. A supporting block is provided inside the air inlet pipe, and the top end of the supporting block is located inside the sliding groove. The top of the supporting block and the top inner wall of the sliding groove are connected by a plurality of first compression springs. A guiding groove is formed on the inner wall of the sliding groove. A guiding block is fixedly connected to the supporting block, and the guiding block is located inside the guiding groove. The heat dissipation box is provided with a pushing member adapted to the supporting block. The heat dissipation box is provided with an elastic member adapted to the sealing sleeve, and one end of the air inlet pipe away from the heat dissipation box contacts the second filter screen.

[0014] Preferably, the pushing member includes support seats respectively arranged on both sides of the swinging box. Pressing plates are fixedly connected to the outer sides of the two support seats away from each other. An inclined surface adapted to the pressing plate is provided at the bottom end of the support block. Two movable columns are fixedly connected to the outer sides of the two support seats away from each other. A fixed sleeve is slidably sleeved on the outer part of the movable column. The fixed sleeve is fixedly connected to the inner wall of the heat dissipation box. A second compression spring is sleeved on the outer part of the fixed sleeve. The two ends of the second compression spring are respectively fixedly connected to the support seat and the inner wall of the heat dissipation box.

[0015] Preferably, the elastic member includes a number of second support parts fixedly installed on the outer wall of the sealing sleeve. A second guiding column penetrates through the second support part. One end of the second guiding column is fixedly connected to the heat dissipation box, and the other end of the second guiding column is fixedly connected to a fixed disk. The second support part and the heat dissipation box are connected by a tension spring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] Start the heat dissipation fan, and drive the swinging box to swing back and forth in the heat dissipation box through the reciprocating swinging structure. The angle adjustment mechanism drives the heat dissipation fan to rotate relative to the swinging box to change the inclination angle of the heat dissipation fan, so that the heat dissipation fan dissipates heat from different positions inside the installation shell, which can make the heat dissipation inside the installation shell smooth and reduce the influence of temperature on the normal operation of electronic components. External air enters the installation shell through the second filter screen and the air inlet pipe. The hot air inside the installation shell is discharged through the air outlet holes. The first filter screen is used to prevent external dust from entering the installation shell. The cleaning component is used to clean the dust on the second filter screen to reduce the influence on the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation to the present invention.

[0019] In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the partial structure inside the installation shell of the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the cleaning component of the present invention;

[0023] Figure 4 is a schematic diagram of the split structure of the fixed block and the support block of the present invention;

[0024] Figure 5 is a schematic diagram of the structure inside the heat dissipation box of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the meshing state of the first gear and the third gear of the present invention;

[0026] Figure 7 This is a schematic structural diagram inside the swing box of the present invention;

[0027] Figure 8 This is a schematic structural diagram of the separation of the fixed column and the rectangular ring of the present invention.

[0028] In the figure: 1. Differential protection main body; 2. Installation shell; 3. Air outlet hole; 4. First filter screen; 5. Heat dissipation box; 6. Rectangular hole; 7. Swing box; 8. Heat dissipation fan; 9. Air inlet pipe; 10. Sealing sleeve; 11. Second filter screen; 12. First rotating shaft; 13. Connecting column; 14. Worm gear; 15. Worm; 16. First gear; 17. Servo motor; 18. Second gear; 19. First avoidance hole; 20. Second rotating shaft; 21. First connecting plate; 22. Second avoidance hole; 23. First connecting shaft; 24. First bevel gear; 25. Second bevel gear; 26. Third bevel gear; 27. Second connecting shaft; 28. Third gear; 29. Fourth gear; 30. Rack; 31. Second connecting plate; 32. Fixed column; 33. Rectangular ring; 34. First guiding column; 35. First supporting part; 36. Fixed block; 37. Chute; 38. Supporting block; 39. First compression spring; 40. Guiding groove; 41. Guiding block; 42. Supporting seat; 43. Pressing plate; 44. Moving column; 45. Fixed sleeve; 46. Second compression spring; 47. Second supporting part; 48. Second guiding column; 49. Fixed disk; 50. Tensile spring. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1, consisting of Figure 1 , Figure 2 and Figure 3Given that, the present invention includes a differential protection main body 1 and a mounting case 2. The differential protection main body 1 is fixedly installed on the mounting case 2. Air outlet holes 3 are respectively formed on the inner walls of both sides of the mounting case 2. A first filter screen 4 is fixedly connected inside the air outlet holes 3. A rectangular hole 6 is formed on the inner wall of the mounting case 2. A heat dissipation box 5 adapted to the rectangular hole 6 is fixedly connected to the outer wall of the mounting case 2. A swing box 7 is arranged inside the heat dissipation box 5. The heat dissipation box 5 is provided with a reciprocating swing structure for driving the swing box 7 to swing. A heat dissipation fan 8 is arranged inside the mounting case 2. The swing box 7 is provided with an angle adjustment mechanism for changing the inclination angle of the heat dissipation fan 8. Air inlet pipes 9 are respectively fixedly connected to both sides of the heat dissipation box 5. A sealing sleeve 10 is slidably sleeved outside the air inlet pipes 9. A second filter screen 11 is fixedly connected inside the sealing sleeve 10. The heat dissipation box 5 is provided with a cleaning component adapted to the second filter screen 11. Start the heat dissipation fan 8, and drive the swing box 7 to reciprocate inside the heat dissipation box 5 through the reciprocating swing structure. The angle adjustment mechanism drives the heat dissipation fan 8 to rotate relative to the swing box 7, changing the inclination angle of the heat dissipation fan 8, so that the heat dissipation fan 8 dissipates heat to different positions inside the mounting case 2, which can make the heat dissipation inside the mounting case 2 smooth, reduce the influence of temperature on the normal operation of electronic components. External air enters the mounting case 2 through the second filter screen 11 and the air inlet pipes 9. The hot air inside the mounting case 2 is discharged through the air outlet holes 3. The first filter screen 4 prevents external dust from entering the mounting case 2. The cleaning component cleans the dust on the second filter screen 11, reducing the influence on the heat dissipation effect.

[0031] Embodiment 2, on the basis of Embodiment 1, by Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8Given that the reciprocating swing structure includes a first rotating shaft 12 rotatably installed in the heat dissipation box 5. The first rotating shaft 12 and the swing box 7 are fixedly connected by a connecting column 13. A worm gear 14 is fixedly sleeved outside the first rotating shaft 12. A worm 15 meshing with the worm gear 14 is rotatably connected in the heat dissipation box 5. The heat dissipation box 5 is equipped with a driving member for driving the rotation of the worm 15. The driving member includes a first gear 16 fixedly sleeved outside the worm 15. A servo motor 17 is provided on the outer wall of the heat dissipation box 5, and the servo motor 17 and the heat dissipation box 5 are connected by a plurality of bolts. The output end of the servo motor 17 is fixedly connected with a second gear 18 located in the heat dissipation box 5, and the second gear 18 meshes with the first gear 16. A first avoidance hole 19 adapted to the second gear 18 is opened on the inner wall of the heat dissipation box 5. The angle adjustment mechanism includes a second rotating shaft 20 rotatably installed in the swing box 7. The second rotating shaft 20 and the heat dissipation fan 8 are fixedly connected by two first connecting plates 21. Two second avoidance holes 22 adapted to the first connecting plates 21 are opened on the inner wall of the swing box 7. A first connecting shaft 23 is rotatably connected to the swing box 7. One end of the first connecting shaft 23 is equipped with a transmission unit adapted to the second rotating shaft 20, and the other end of the first connecting shaft 23 is equipped with a synchronous coupler adapted to the first gear 16. The synchronous coupler includes a first bevel gear 24 fixedly installed on the first connecting shaft 23. A second bevel gear 25 is sleeved outside the first rotating shaft 12, and the second bevel gear 25 is rotatably connected to the heat dissipation box 5. A second connecting shaft 27 is rotatably connected in the heat dissipation box 5. A third bevel gear 26 is fixedly installed on the second connecting shaft 27, and the third bevel gear 26 and the first bevel gear 24 respectively mesh with the second bevel gear 25. A third gear 28 meshing with the first gear 16 is fixedly sleeved outside the second connecting shaft 27. The transmission unit includes a fourth gear 29 fixedly sleeved outside the second rotating shaft 20. The first connecting shaft 23 is fixedly installed with a second connecting plate 31 located in the swing box 7. The second connecting plate 31 is fixedly installed with a fixed column 32. A rectangular ring 33 is slidably sleeved outside the fixed column 32. A toothed plate 30 meshing with the fourth gear 29 is fixedly installed on the rectangular ring 33. The swing box 7 is equipped with a guiding member adapted to the rectangular ring 33. The guiding member includes at least one first guiding column 34 fixedly installed in the swing box 7. A first supporting portion 35 is slidably sleeved outside the first guiding column 34, and the first supporting portion 35 is fixedly connected to the rectangular ring 33;

[0032] The second gear 18 is driven to rotate by the servo motor 17. The second gear 18 drives the worm 15 to rotate through the first gear 16. The worm 15 can drive the first rotating shaft 12 to rotate through the worm gear 14. The first rotating shaft 12 drives the swing box 7 to swing through the connecting column 13. After the swing box 7 swings to the preset position, the second gear 18 is driven to rotate in the reverse direction by the servo motor 17, so that the swing box 7 can swing in the opposite direction. The staff drives the bolt on the servo motor 17 to rotate, so that the bolt on the servo motor 17 is disengaged from the heat dissipation box 5 and the servo motor 17, and the limitation of the position of the servo motor 17 is released. The staff drives the servo motor 17 and the second gear 18 to move. The second gear 18 is no longer engaged with the first gear 16, and the second gear 18 is withdrawn from the heat dissipation box 5 through the first avoidance hole 19, and the removal of the servo motor 17 can be completed. When the first rotating shaft 12 drives the swing box 7 to swing through the connecting column 13, the swing box 7 drives the first bevel gear 24 to roll on the second bevel gear 25 through the first connecting shaft 23. While the first gear 16 rotates, the first gear 16 drives the second connecting shaft 27 and the third bevel gear 26 to rotate through the third gear 28. The third bevel gear 26 drives the first connecting shaft 23 to rotate through the second bevel gear 25 and the first bevel gear 24. The first connecting shaft 23 drives the fixed column 32 to reciprocate in the rectangular ring 33 through the second connecting plate 31. The fixed column 32 can push the rectangular ring 33 to reciprocate in the vertical direction. The rectangular ring 33 drives the fourth gear 29 and the second rotating shaft 20 to periodically rotate forward and backward through the toothed plate 30. The second rotating shaft 20 can drive the heat dissipation fan 8 to move through the first connecting plate 21. The first connecting plate 21 moves relative to the second avoidance hole 22 to change the inclination angle of the heat dissipation fan 8. When the rectangular ring 33 reciprocates in the vertical direction, the rectangular ring 33 drives the first support portion 35 to reciprocate in the vertical direction relative to the first guide post 34. Through the design of the first guide post 34 and the first support portion 35, the rectangular ring 33 can move smoothly in the vertical direction relative to the swing box 7.

[0033] Embodiment 3, on the basis of Embodiment 1, by Figure 2 、 Figure 3 and Figure 4Given that the cleaning component includes a fixing block 36 fixedly installed on the second filter screen 11, and the fixing block 36 is located inside the air inlet pipe 9. A sliding groove 37 is formed at the bottom of the fixing block 36. A support block 38 is arranged inside the air inlet pipe 9, and the top end of the support block 38 is located inside the sliding groove 37. The top of the support block 38 and the inner wall of the top of the sliding groove 37 are connected by a plurality of first compression springs 39. A guiding groove 40 is formed on the inner wall of the sliding groove 37. A guiding block 41 is fixedly connected to the support block 38, and the guiding block 41 is located inside the guiding groove 40. The heat dissipation box 5 is provided with a pushing member adapted to the support block 38, and the heat dissipation box 5 is provided with an elastic member adapted to the sealing sleeve 10. And one end of the air inlet pipe 9 away from the heat dissipation box 5 is in contact with the second filter screen 11. The pushing member includes support seats 42 respectively arranged on both sides of the swing box 7. Pressing plates 43 are fixedly connected to the sides of the two support seats 42 away from each other. And an inclined surface adapted to the pressing plate 43 is provided at the bottom end of the support block 38. Two movable columns 44 are fixedly connected to the sides of the two support seats 42 away from each other. A fixed sleeve 45 is slidably sleeved on the outside of the movable column 44. The fixed sleeve 45 is fixedly connected to the inner wall of the heat dissipation box 5. A second compression spring 46 is sleeved on the outside of the fixed sleeve 45, and both ends of the second compression spring 46 are fixedly connected to the support seat 42 and the inner wall of the heat dissipation box 5 respectively. The elastic member includes a plurality of second support parts 47 fixedly installed on the outer wall of the sealing sleeve 10. A second guiding column 48 penetrates through the second support part 47. One end of the second guiding column 48 is fixedly connected to the heat dissipation box 5. The other end of the second guiding column 48 is fixedly connected to a fixed disk 49. And the second support part 47 and the heat dissipation box 5 are connected by a tension spring 50;

[0034] When the reciprocating swing structure drives the swing box 7 to swing towards one of the support seats 42, the swing box 7 first contacts the corresponding support seat 42. The swing box 7 pushes the support seat 42 and the pressing plate 43 to move synchronously. The support seat 42 drives the movable column 44 to slide relative to the fixed sleeve 45, and the second compression spring 46 is in a compressed state. At this time, the pressing plate 43 contacts the inclined surface of the support block 38, and the first compression spring 39 is in a compressed state. The first compression spring 39 exerts a downward pressure on the support block 38. The bottom of the guide block 41 is in close contact with the inner wall of the bottom of the guide groove 40, so that the support block 38 is fixed relative to the fixed block 36. At this time, the tension spring 50 is in a stretched state, and the elastic force generated by the tension spring 50 is less than the elastic force generated by the first compression spring 39. As the pressing plate 43 continues to move, the pressing plate 43 pushes the support block 38 and the fixed block 36 to move synchronously. The fixed block 36 drives the sealing sleeve 10 to move synchronously through the second filter screen 11. The second support portion 47 slides relative to the second guide post 48. The tension spring 50 is in a stretched state, and the elastic force generated by the tension spring 50 is always less than the elastic force generated by the first compression spring 39. When the second support portion 47 contacts the fixed disk 49, the sealing sleeve 10 and the second filter screen 11 stop moving. As the support seat 42 and the pressing plate 43 continue to move, the pressing plate 43 slides relative to the inclined surface of the support block 38. The pressing plate 43 pushes the support block 38 to move. The support block 38 slides relative to the fixed block 36, and the length of the first compression spring 39 becomes shorter. When the support block 38 moves above the pressing plate 43, the pressing plate 43 no longer contacts the inclined surface of the support block 38. The frictional force between the bottom of the support block 38 and the top of the pressing plate 43 is less than the elastic force generated by the tension spring 50. The tension spring 50 drives the second support portion 47 and the sealing sleeve 10 to move in the reverse direction until the second filter screen 11 contacts the air inlet pipe 9, and the sealing sleeve 10 and the second filter screen 11 stop moving, so that the dust on the second filter screen 11 shakes off. At the same time, the support block 38 slides on the top of the pressing plate 43. When the reciprocating swing structure drives the swing box 7 to swing towards the other support seat 42, the swing box 7 no longer presses the corresponding support seat 42. The second compression spring 46 drives the support seat 42 and the movable column 44 to move in the reverse direction, so that the support seat 42 and the pressing plate 43 move relative to the heat dissipation box 5 to the initial position, and the pressing plate 43 moves relative to the support block 38 in the reverse direction. When the end of the pressing plate 43 moves below the inclined surface of the support block 38, the first compression spring 39 pushes the support block 38 to move downward, and the inclined surface of the support block 38 contacts the pressing plate 43 again, so that the support block 38 and the pressing plate 43 can be reset to the initial position relative to the heat dissipation box 5.

[0035] Working principle: Start the cooling fan 8, and drive the swing box 7 to swing back and forth in the cooling box 5 through the reciprocating swing structure. The angle adjustment mechanism drives the cooling fan 8 to rotate relative to the swing box 7 to change the inclination angle of the cooling fan 8, so that the cooling fan 8 can dissipate heat from different positions inside the mounting shell 2, which can make the heat dissipation inside the mounting shell 2 smooth and reduce the influence of temperature on the normal operation of electronic components. External air enters the mounting shell 2 through the second filter screen 11 and the air inlet pipe 9, and the hot air inside the mounting shell 2 is discharged through the air outlet holes 3. The first filter screen 4 is used to prevent external dust from entering the mounting shell 2, and the cleaning component is used to clean the dust on the second filter screen 11 to reduce the influence on the heat dissipation effect;

[0036] Drive the second gear 18 to rotate through the servo motor 17. The second gear 18 drives the worm 15 to rotate through the first gear 16. The worm 15 can drive the first rotating shaft 12 to rotate through the worm gear 14. The first rotating shaft 12 drives the swing box 7 to swing through the connecting column 13. When the swing box 7 swings to the preset position, drive the second gear 18 to rotate in the reverse direction through the servo motor 17, so that the swing box 7 can swing in the opposite direction. The staff drives the bolt on the servo motor 17 to rotate, so that the bolt on the servo motor 17 disengages from the cooling box 5 and the servo motor 17, releasing the limitation on the position of the servo motor 17. The staff drives the servo motor 17 and the second gear 18 to move. The second gear 18 no longer meshes with the first gear 16, and the second gear 18 is withdrawn from the cooling box 5 through the first avoidance hole 19, and the removal of the servo motor 17 can be completed;

[0037] When the first rotating shaft 12 drives the swing box 7 to swing through the connecting column 13, the swing box 7 drives the first bevel gear 24 to roll on the second bevel gear 25 through the first connecting shaft 23. While the first gear 16 rotates, the first gear 16 drives the second connecting shaft 27 and the third bevel gear 26 to rotate through the third gear 28. The third bevel gear 26 drives the first connecting shaft 23 to rotate through the second bevel gear 25 and the first bevel gear 24. The first connecting shaft 23 drives the fixed column 32 to reciprocate in the rectangular ring 33 through the second connecting plate 31. The fixed column 32 can push the rectangular ring 33 to move reciprocally in the vertical direction. The rectangular ring 33 drives the fourth gear 29 and the second rotating shaft 20 to periodically rotate forward and backward through the toothed plate 30. The second rotating shaft 20 can drive the cooling fan 8 to move through the first connecting plate 21. The first connecting plate 21 moves relative to the second avoidance hole 22 to change the inclination angle of the cooling fan 8. When the rectangular ring 33 moves reciprocally in the vertical direction, the rectangular ring 33 drives the first supporting part 35 to reciprocally slide in the vertical direction relative to the first guiding column 34. Through the design of the first guiding column 34 and the first supporting part 35, the rectangular ring 33 can move stably in the vertical direction relative to the swing box 7;

[0038] When the reciprocating swing structure drives the swing box 7 to swing towards one of the support seats 42, the swing box 7 first contacts the corresponding support seat 42. The swing box 7 pushes the support seat 42 and the pressing plate 43 to move synchronously. The support seat 42 drives the movable column 44 to slide relative to the fixed sleeve 45, and the second compression spring 46 is in a compressed state. At this time, the pressing plate 43 contacts the inclined surface of the support block 38, and the first compression spring 39 is in a compressed state. The first compression spring 39 exerts a downward pressure on the support block 38. The bottom of the guide block 41 is in close contact with the inner wall of the bottom of the guide groove 40, so that the support block 38 is fixed relative to the fixed block 36. At this time, the tension spring 50 is in a stretched state, and the elastic force generated by the tension spring 50 is less than the elastic force generated by the first compression spring 39. As the pressing plate 43 continues to move, the pressing plate 43 pushes the support block 38 and the fixed block 36 to move synchronously. The fixed block 36 drives the sealing sleeve 10 to move synchronously through the second filter screen 11. The second support portion 47 slides relative to the second guide post 48. The tension spring 50 is in a stretched state, and the elastic force generated by the tension spring 50 is always less than the elastic force generated by the first compression spring 39. When the second support portion 47 contacts the fixed disk 49, the sealing sleeve 10 and the second filter screen 11 stop moving. As the support seat 42 and the pressing plate 43 continue to move, the pressing plate 43 slides relative to the inclined surface of the support block 38. The pressing plate 43 pushes the support block 38 to move. The support block 38 slides relative to the fixed block 36, and the length of the first compression spring 39 becomes shorter. When the support block 38 moves above the pressing plate 43, the pressing plate 43 no longer contacts the inclined surface of the support block 38. The frictional force between the bottom of the support block 38 and the top of the pressing plate 43 is less than the elastic force generated by the tension spring 50. The tension spring 50 drives the second support portion 47 and the sealing sleeve 10 to move in the reverse direction until the second filter screen 11 contacts the air inlet pipe 9, and the sealing sleeve 10 and the second filter screen 11 stop moving, so that the dust on the second filter screen 11 shakes off. At the same time, the support block 38 slides on the top of the pressing plate 43. When the reciprocating swing structure drives the swing box 7 to swing towards the other support seat 42, the swing box 7 no longer presses the corresponding support seat 42. The second compression spring 46 drives the support seat 42 and the movable column 44 to move in the reverse direction, so that the support seat 42 and the pressing plate 43 move relative to the heat dissipation box 5 to the initial position, and the pressing plate 43 moves relative to the support block 38 in the reverse direction. When the end of the pressing plate 43 moves below the inclined surface of the support block 38, the first compression spring 39 pushes the support block 38 downward, and the inclined surface of the support block 38 contacts the pressing plate 43 again, so that the support block 38 and the pressing plate 43 are reset to the initial position relative to the heat dissipation box 5.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer differential protection device, comprising a differential protection body (1) and a mounting shell (2), characterized in that: The differential protection body (1) is fixedly mounted on the mounting shell (2); air outlet holes (3) are respectively provided on the inner walls of both sides of the mounting shell (2); a first filter (4) is fixedly connected to the air outlet hole (3); a rectangular hole (6) is provided on the inner wall of the mounting shell (2); a heat sink (5) matched with the rectangular hole (6) is fixedly connected to the outer wall of the mounting shell (2); a swing box (7) is provided in the heat sink (5); a reciprocating swing structure for driving the swing box (7) to swing is installed in the heat sink (5); a heat dissipation fan (8) is provided in the mounting shell (2); an angle adjustment mechanism for changing the tilt angle of the heat dissipation fan (8) is installed in the swing box (7); an air intake pipe (9) is respectively fixedly connected to the two sides of the heat sink (5); an outer sliding sleeve of the air intake pipe (9) is provided with a sealing sleeve (10); a second filter (11) is fixedly connected in the sealing sleeve (10); and a cleaning component matched with the second filter (11) is installed in the heat sink (5); The angle adjustment mechanism comprises a second rotating shaft (20) rotatably mounted in the swing box (7); the second rotating shaft (20) and the heat dissipation fan (8) are fixedly connected via two first connecting plates (21); two second avoidance holes (22) matched with the first connecting plates (21) are provided on the inner wall of the swing box (7); a first connecting shaft (23) is rotatably connected to the swing box (7); a transmission unit matched with the second rotating shaft (20) is mounted on one end of the first connecting shaft (23); and a synchronous meshing device matched with the first gear (16) is mounted on the other end of the first connecting shaft (23); The cleaning assembly comprises a fixed block (36) fixedly mounted on the second filter screen (11), and the fixed block (36) is located in the air intake pipe (9), a slide groove (37) is provided at the bottom of the fixed block (36), a support block (38) is provided in the air intake pipe (9), and the top of the support block (38) is located in the slide groove (37), the top of the support block (38) and the top inner wall of the slide groove (37) are connected by a plurality of first compression springs (39), a guide groove (40) is provided on the inner wall of the slide groove (37), a guide block (41) is fixedly connected to the support block (38), and the guide block (41) is located in the guide groove (40), the heat sink (5) is provided with a pusher matched with the support block (38), the heat sink (5) is provided with an elastic device matched with the sealing sleeve (10), and one end of the air intake pipe (9) away from the heat sink (5) is in contact with the second filter screen (11).

2. The transformer differential protection device according to claim 1, characterized in that: The reciprocating swing structure comprises a first rotating shaft (12) rotatably mounted in a heat sink (5); the first rotating shaft (12) and the swing box (7) are fixedly connected via a connecting column (13); an external fixed sleeve of the first rotating shaft (12) is provided with a worm gear (14); a worm (15) meshing with the worm gear (14) is rotatably connected in the heat sink (5); and a driving member for driving the worm gear (15) to rotate is installed in the heat sink (5).

3. The transformer differential protection device according to claim 2, characterized in that: The driving member comprises a first gear (16) fixedly sleeved on the outside of the worm (15); a servo motor (17) is provided on the outer wall of the heat sink (5); the servo motor (17) and the heat sink (5) are connected via a plurality of bolts; an output end of the servo motor (17) is fixedly connected to a second gear (18) located in the heat sink (5); the second gear (18) and the first gear (16) are meshed; and a first avoidance hole (19) adapted to the second gear (18) is provided on the inner wall of the heat sink (5).

4. The transformer differential protection device according to claim 1, characterized in that: The synchronous clutch comprises a first bevel gear (24) fixedly mounted on a first connecting shaft (23); a second bevel gear (25) is sleeved on the outside of the first rotating shaft (12); the second bevel gear (25) is rotatably connected to a heat sink (5); a second connecting shaft (27) is rotatably connected inside the heat sink (5); a third bevel gear (26) is fixedly mounted on the second connecting shaft (27); the third bevel gear (26) and the first bevel gear (24) are respectively meshed with the second bevel gear (25); and a third gear (28) meshed with the first gear (16) is sleeved on the outside of the second connecting shaft (27).

5. The transformer differential protection device according to claim 1, characterized in that: The transmission unit comprises a fourth gear (29) fixedly sleeved on the outside of the second rotating shaft (20); a second connecting plate (31) located in the swing box (7) is fixedly mounted on the first connecting shaft (23); a fixing column (32) is fixedly mounted on the second connecting plate (31); a rectangular ring (33) is provided on the outer sliding sleeve of the fixing column (32); a toothed plate (30) meshing with the fourth gear (29) is fixedly mounted on the rectangular ring (33); and a guide member matched with the rectangular ring (33) is mounted on the swing box (7).

6. The transformer differential protection device according to claim 5, characterized in that: The guide member comprises at least one first guide column (34) fixedly mounted in the swing box (7); an outer sliding sleeve of the first guide column (34) is provided with a first support portion (35); and the first support portion (35) and the rectangular ring (33) are fixedly connected.

7. The transformer differential protection device according to claim 1, characterized in that: The pusher comprises support seats (42) respectively arranged on both sides of the swing box (7); the two support seats (42) are respectively fixedly connected with a pressing plate (43) on one side away from each other; the bottom end of the support block (38) is provided with an inclined surface matched with the pressing plate (43); the two support seats (42) are respectively fixedly connected with two movable columns (44) on one side away from each other; the outer sliding sleeve of the movable column (44) is provided with a fixing sleeve (45); the fixing sleeve (45) is fixedly connected to the inner wall of the heat dissipation box (5); the outer sleeve of the fixing sleeve (45) is provided with a second compression spring (46); and the two ends of the second compression spring (46) are respectively fixedly connected to the support seat (42) and the inner wall of the heat dissipation box (5).

8. The transformer differential protection device according to claim 1, characterized in that: The elastic device comprises a plurality of second support portions (47) fixedly mounted on the outer wall of the sealing sleeve (10), a second guide column (48) passing through the second support portion (47), one end of the second guide column (48) being fixedly connected to the heat sink (5), the other end of the second guide column (48) being fixedly connected to a fixing plate (49), and the second support portion (47) and the heat sink (5) being connected via a tension spring (50).

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