Differential protection device of transformer

Abstract

The invention relates to the technical field of differential protection, and discloses a transformer differential protection device which solves the problems that heat dissipation in a protection device is not smooth, and normal work of electronic components is influenced, the transformer differential protection device comprises a differential protection body and an installation shell, the differential protection body is fixedly installed on the installation shell, and air outlet holes are formed in the inner walls of the two sides of the installation shell respectively. A first filter screen is fixedly connected in the air outlet hole, a rectangular hole is formed in the inner wall of the mounting shell, a heat dissipation box matched with the rectangular hole is fixedly connected to the outer wall of the mounting shell, a swing box is arranged in the heat dissipation box, a reciprocating swing structure used for driving the swing box to swing is installed in the heat dissipation box, and a heat dissipation fan is arranged in the mounting shell; the swing box is provided with an angle adjusting mechanism used for changing the inclination angle of the heat dissipation fan, the two sides of the heat dissipation box are fixedly connected with air inlet pipes correspondingly, and the air inlet pipes are sleeved with sealing sleeves in a sliding mode. Heat dissipation in the mounting shell can be smooth, and the influence of temperature on normal work of electronic components is reduced.

Description

Technical Field

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

[0002] Transformers are important equipment in power systems. Transformer failures will seriously affect the safe and stable operation of power systems and the reliability of power supply. Transformer differential protection devices are mainly used to protect transformer equipment. Transformer differential protection devices should have differential quick-break protection and compound ratio differential protection with or without second harmonic braking.

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

[0004] Therefore, in order to solve the above problems, a related facility that better 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 present invention provides a transformer differential protection device, which effectively solves the problem of poor heat dissipation inside the protection device in the above background technology, affecting the normal operation of electronic components.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transformer differential protection device, comprising a differential protection body and a mounting shell, wherein the differential protection body is fixedly mounted on the mounting shell, and air outlet holes are respectively provided on the inner walls on both sides of the mounting shell, and a first filter is fixedly connected to the air outlet holes, a rectangular hole is provided on the inner wall of the mounting shell, and a heat sink matched with the rectangular hole is fixedly connected to the outer wall of the mounting shell, a swing box is provided in the heat sink, and a reciprocating swing structure for driving the swing box to swing is installed in the heat sink, a heat dissipation fan is provided in the mounting shell, and an angle adjustment mechanism for changing the inclination angle of the heat dissipation fan is installed, and air intake pipes are respectively fixedly connected on both sides of the heat sink, and a sealing sleeve is provided on the outer sliding sleeve, and a second filter is fixedly connected in the sealing sleeve, and a cleaning component matched with the second filter is installed in the heat sink.

[0007] Preferably, the reciprocating swinging structure includes a first rotating shaft rotatably installed in the heat sink, the first rotating shaft and the swinging box are fixedly connected by a connecting column, the external fixed sleeve of the first rotating shaft is provided with a worm gear, a worm gear meshing with the worm gear is rotatably connected in the heat sink, and the heat sink is equipped with a driving member for driving the worm gear to rotate.

[0008] Preferably, the driving member includes a first gear fixedly mounted on the outside of the worm, a servo motor is provided on the outer wall of the heat sink, and the servo motor and the heat sink are connected by a plurality of bolts, the output end of the servo motor is fixedly connected to a second gear located in the heat sink, and the second gear is meshed with the first gear, and a first avoidance hole adapted to the second gear is provided on the inner wall of the heat sink.

[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 matched with the first connecting plates are opened on the inner wall of the swing box, and a first connecting shaft is rotatably connected to the swing box, a transmission unit matched with the second rotating shaft is installed at one end of the first connecting shaft, and a synchronous clutch matched with the first gear is installed at the other end of the first connecting shaft.

[0010] Preferably, the synchronous clutch includes a first bevel gear fixedly mounted on the first connecting shaft, a second bevel gear is provided on the outer sleeve of the first rotating shaft, and the second bevel gear is rotatably connected to the heat sink, a second connecting shaft is rotatably connected inside the heat sink, a third bevel gear is fixedly mounted on the second connecting shaft, and the third bevel gear and the first bevel gear are respectively meshed with the second bevel gear, and the outer fixed sleeve of the second connecting shaft is provided with a third gear meshed with the first gear.

[0011] Preferably, the transmission unit includes a fourth gear fixedly mounted on the outside of the second rotating shaft, the first connecting shaft is fixedly installed with a second connecting plate located in the swing box, the second connecting plate is fixedly installed with a fixed column, the external sliding sleeve of the fixed column is provided with a rectangular ring, the rectangular ring is fixedly installed with a tooth plate meshing with the fourth gear, and the swing box is installed with a guide member adapted to the rectangular ring.

[0012] Preferably, the guide member comprises at least one first guide column fixedly installed in the swing box, the outer sliding sleeve of the first guide column is provided with a first support portion, and the first support portion is fixedly connected to the rectangular ring.

[0013] Preferably, the cleaning assembly includes a fixed block fixedly mounted on the second filter, and the fixed block is located in the air inlet pipe, a slide groove is provided at the bottom of the fixed block, a support block is provided in the air inlet pipe, and the top of the support block is located in the slide groove, the top of the support block and the top inner wall of the slide groove are connected by a plurality of first compression springs, a guide groove is provided on the inner wall of the slide groove, a guide block is fixedly connected to the support block, and the guide block is located in the guide groove, the heat sink is equipped with a pushing member matched with the support block, the heat sink is equipped with an elastic device matched with the sealing sleeve, and one end of the air inlet pipe away from the heat sink is in contact with the second filter.

[0014] Preferably, the pushing member includes support seats respectively arranged on both sides of the swing box, the two support seats are fixedly connected with a pressing plate on one side away from each other, and the bottom end of the support block is provided with an inclined surface adapted to the pressing plate, and the two support seats are fixedly connected with two movable columns on one side away from each other, the outer sliding sleeve of the movable column is provided with a fixed sleeve, the fixed sleeve is fixedly connected to the inner wall of the heat sink, the outer sleeve of the fixed sleeve is provided with a second compression spring, and the two ends of the second compression spring are fixedly connected to the support seat and the inner wall of the heat sink.

[0015] Preferably, the elastic device includes a plurality of second support parts fixedly mounted on the outer wall of the sealing sleeve, a second guide column passes through the second support part, one end of the second guide column is fixedly connected to the heat sink, the other end of the second guide column is fixedly connected to a fixed plate, and the second support part and the heat sink are connected by a tension spring.

[0016] Compared with the prior art, the present invention has the following beneficial effects: Start the heat dissipation fan, and drive the swing box to swing back and forth in the heat dissipation box through the reciprocating swing structure, and the angle adjustment mechanism drives the heat dissipation fan to rotate relative to the swing box, and changes the inclination angle of the heat dissipation fan, so that the heat dissipation fan can dissipate heat at different positions in the installation shell, so that the heat dissipation inside the installation shell can be smooth, and the influence of temperature on the normal operation of electronic components can be reduced. External air enters the installation shell through the second filter and the air inlet pipe, and the hot air in the installation shell is discharged through the air outlet, and the first filter is used to prevent external dust from entering the installation shell, and the dust on the second filter is cleaned by the cleaning component to reduce the influence on the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide 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 of the present invention.

[0018] In the attached picture: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of a part of the interior of the installation shell of the present invention; Figure 3 It is a structural schematic diagram of the cleaning component of the present invention; Figure 4 It is a schematic diagram of the structure of the fixed block and the supporting block separated from each other in the present invention; Figure 5 It is a schematic diagram of the structure inside the heat dissipation box of the present invention; Figure 6 It is a structural schematic diagram of the meshing state of the first gear and the third gear of the present invention; Figure 7 It is a schematic diagram of the structure inside the swing box of the present invention; Figure 8 It is a schematic diagram of the structure of the fixed column and the rectangular ring separated according to the present invention.

[0019] In the figure: 1, differential protection body; 2, mounting shell; 3, air outlet; 4, first filter; 5, heat sink; 6, rectangular hole; 7, swing box; 8, heat dissipation fan; 9, air intake pipe; 10, sealing sleeve; 11, second filter; 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 , the third bevel gear; 27, the second connecting shaft; 28, the third gear; 29, the fourth gear; 30, the tooth plate; 31, the second connecting plate; 32, the fixing column; 33, the rectangular ring; 34, the first guide column; 35, the first supporting portion; 36, the fixing block; 37, the slide groove; 38, the supporting block; 39, the first compression spring; 40, the guide groove; 41, the guide block; 42, the supporting seat; 43, the pressing plate; 44, the movable column; 45, the fixing sleeve; 46, the second compression spring; 47, the second supporting portion; 48, the second guide column; 49, the fixing disk; 50, the tension spring. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Embodiment 1, by Figure 1 , Figure 2 and Figure 3The present invention includes a differential protection body 1 and a mounting shell 2, wherein the differential protection body 1 is fixedly mounted on the mounting shell 2, and air outlet holes 3 are respectively provided on the inner walls of both sides of the mounting shell 2, and a first filter 4 is fixedly connected to the air outlet hole 3, and a rectangular hole 6 is provided on the inner wall of the mounting shell 2, and a heat sink 5 adapted to the rectangular hole 6 is fixedly connected to the outer wall of the mounting shell 2, and a swing box 7 is provided in the heat sink 5, and the heat sink 5 is equipped with a reciprocating swinging structure for driving the swing box 7 to swing, and a heat dissipation fan 8 is provided in the mounting shell 2, and the swing box 7 is equipped with an angle adjustment mechanism for changing the inclination angle of the heat dissipation fan 8, and air intake pipes 9 are respectively fixedly connected to the two sides of the heat sink 5, and the outer sliding sleeve of the air intake pipe 9 is provided with a sealing sleeve 10, and a second filter is fixedly connected to the sealing sleeve 10 11. The heat dissipation box 5 is equipped with a cleaning component compatible with the second filter 11; the heat dissipation fan 8 is started, and the swing box 7 is driven to swing back and forth in the heat dissipation box 5 through the reciprocating swing structure, and the angle adjustment mechanism drives the heat dissipation fan 8 to rotate relative to the swing box 7, and changes the inclination angle of the heat dissipation fan 8, so that the heat dissipation fan 8 can dissipate heat at different positions in the mounting shell 2, which can make the heat dissipation inside the mounting shell 2 unobstructed, and reduce the influence of temperature on the normal operation of electronic components. External air enters the mounting shell 2 through the second filter 11 and the air inlet pipe 9, and the hot air in the mounting shell 2 is discharged through the air outlet 3, and the first filter 4 is used to prevent external dust from entering the mounting shell 2, and the dust on the second filter 11 is cleaned by the cleaning component to reduce the influence on the heat dissipation effect.

[0022] Embodiment 2, based on embodiment 1, Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8The reciprocating swing structure includes a first rotating shaft 12 rotatably mounted in the heat sink 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 on the outside of the first rotating shaft 12, 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 15 to rotate is installed in the heat sink 5, and the driving member includes 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, and the servo motor 17 and the heat sink 5 are connected by a plurality of bolts, and the output end of the servo motor 17 is fixedly connected to the servo motor 17 located in the heat sink 5, and the second gear 18 is meshed 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 shaft 20 rotatably installed in the swing box 7, the second shaft 20 and the heat dissipation fan 8 are fixedly connected through 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 installed with a transmission unit adapted to the second shaft 20, and the first connecting shaft 23 is fixedly connected to the swing box 7. The other end is provided with a synchronous meshing device adapted to the first gear 16, and the synchronous meshing device includes a first bevel gear 24 fixedly mounted on the first connecting shaft 23, a second bevel gear 25 is sleeved on the outside of the first rotating shaft 12, and the second bevel gear 25 is rotatably connected to the 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, and the third bevel gear 26 and the first bevel gear 24 are respectively meshed with the second bevel gear 25, a third gear 28 meshed with the first gear 16 is fixedly sleeved on the outside of the second connecting shaft 27, and the transmission unit includes a fixed A fourth gear 29 is sleeved on the outside of the second rotating shaft 20, a second connecting plate 31 located in the swing box 7 is fixedly installed on the first connecting shaft 23, a fixing column 32 is fixedly installed 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 installed on the rectangular ring 33, a guide member matched with the rectangular ring 33 is installed on the swing box 7, the guide member includes at least one first guide column 34 fixedly installed in the swing box 7, a first support portion 35 is provided on the outer sliding sleeve of the first guide column 34, and the first support portion 35 is fixedly connected to the rectangular ring 33; The second gear 18 is driven to rotate by the servo motor 17, and the second gear 18 drives the worm 15 to rotate through the first gear 16. The worm 15 can drive the first shaft 12 to rotate through the worm wheel 14, and the first shaft 12 drives the swing box 7 to swing through the connecting column 13. When the swing box 7 swings to the preset position, the second gear 18 is driven to rotate in the opposite direction by the servo motor 17, so that the swing box 7 can swing in the opposite direction. The staff drives the bolts on the servo motor 17 to rotate so that the bolts on the servo motor 17 are disengaged from the heat sink 5 and the servo motor 17, and the position restriction of the servo motor 17 is released. The staff drives the servo motor 17 and the second gear 18 to move, and the second gear 18 is no longer meshed with the first gear 16, and the second gear 18 is pulled out of the heat sink 5 through the first avoidance hole 19, and the removal of the servo motor 17 is completed; when the first shaft 12 drives the swing box 7 to swing through the connecting column 13, the swing box 7 drives the first bevel gear 24 in the second The bevel gear 25 rolls on the first gear 16. 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 slide back and forth 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 reverse through the tooth 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 reciprocates in the vertical direction, the rectangular ring 33 drives the first supporting portion 35 to slide back and forth in the vertical direction relative to the first guide column 34. The design of the first guide column 34 and the first supporting portion 35 allows the rectangular ring 33 to move smoothly in the vertical direction relative to the swing box 7.

[0023] Embodiment 3, based on embodiment 1, Figure 2 , Figure 3 and Figure 4It is given that the cleaning component includes a fixed block 36 fixedly mounted on the second filter 11, and the fixed block 36 is located in the air inlet 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 inlet 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 equipped with a pusher adapted to the support block 38, the heat sink 5 is equipped with an elastic device adapted to the sealing sleeve 10, and the end of the air inlet pipe 9 away from the heat sink 5 is in contact with the second filter 11, the pusher includes support seats 42 respectively arranged on both sides of the swing box 7, and the two support seats 42 are away from each other One side of the sealing sleeve 10 is respectively fixedly connected with a pressing plate 43, and the bottom end of the support block 38 is provided with an inclined surface adapted to the pressing plate 43, and the two sides of the two support seats 42 away from each other are respectively fixedly connected with two movable columns 44, 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 sink 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 sink 5, the elastic device includes a plurality of second support parts 47 fixedly mounted on the outer wall of the sealing sleeve 10, the second support part 47 is penetrated by a second guide column 48, one end of the second guide column 48 is fixedly connected to the heat sink 5, the other end of the second guide column 48 is fixedly connected to a fixing plate 49, and the second support part 47 and the heat sink 5 are connected by a tension spring 50; When the reciprocating swing structure drives the swing box 7 to swing toward one of the support seats 42, the swing box 7 first contacts the corresponding support seat 42, and 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. The pressing plate 43 is in contact with the inclined surface of the support block 38 at this time, and the first compression spring 39 is in a compressed state at this time. The first compression spring 39 applies downward pressure to the support block 38, and the bottom of the guide block 41 is tightly attached to the bottom inner wall 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 tensioned state. The elastic force generated by the tension spring 50 is smaller than the elastic force generated by the first compression spring 39. With the continuous movement of the pressing plate 43, 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 column 48. The tension spring 50 is in a tensioned state. The elastic force generated by the tension spring 50 is always smaller than the elastic force generated by the first compression spring 39. When the second support portion 47 contacts the fixed plate 49, the sealing sleeve 10 and the second filter screen 11 stop moving. With the continuous movement of the support seat 42 and the pressing plate 43, the pressing plate 43 is relative to the support block 38. 8 slides, the pressing plate 43 pushes the support block 38 to move, the support block 38 slides relative to the fixed block 36, the length of the first compression spring 39 becomes shorter, and when the support block 38 moves to the top of the pressing plate 43, the pressing plate 43 no longer contacts the inclined surface of the support block 38, and the friction 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, and the tension spring 50 drives the second support portion 47 and the sealing sleeve 10 to move in the opposite direction until the second filter screen 11 contacts the intake pipe 9, the sealing sleeve 10 and the second filter screen 11 stop moving, so that the dust on the second filter screen 11 is shaken off, and the support block 38 is pressed. The top of the plate 43 slides, and when the reciprocating swinging structure drives the swing box 7 to swing toward another support seat 42, the swing box 7 no longer presses the corresponding support seat 42, and the second compression spring 46 drives the support seat 42 and the movable column 44 to move in the opposite direction, so that the support seat 42 and the pressing plate 43 move in the opposite direction to the initial position relative to the heat dissipation box 5, and the pressing plate 43 moves in the opposite direction relative to the support block 38. When the end of the pressing plate 43 moves to 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.

[0024] Working principle: Start the heat dissipation fan 8, and drive the swing box 7 to swing back and forth in the heat dissipation box 5 through the reciprocating swing structure, and the angle adjustment mechanism drives the heat dissipation fan 8 to rotate relative to the swing box 7, and changes the inclination angle of the heat dissipation fan 8, so that the heat dissipation fan 8 can dissipate heat at different positions in the installation shell 2, so that the heat dissipation inside the installation shell 2 can be smooth, and the influence of temperature on the normal operation of electronic components can be reduced. External air enters the installation shell 2 through the second filter 11 and the air inlet pipe 9, and the hot air in the installation shell 2 is discharged through the air outlet 3, and the first filter 4 is used to prevent external dust from entering the installation shell 2, and the dust on the second filter 11 is cleaned by the cleaning component to reduce the influence on the heat dissipation effect; The second gear 18 is driven to rotate by the servo motor 17, and 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 wheel 14, and 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, the second gear 18 is driven to rotate in the opposite direction by the servo motor 17, so that the swing box 7 can swing in the opposite direction. The staff drives the bolts on the servo motor 17 to rotate so that the bolts on the servo motor 17 are separated from the heat sink 5 and the servo motor 17, and the position restriction of the servo motor 17 is released. The staff drives the servo motor 17 and the second gear 18 to move, and the second gear 18 is no longer meshed with the first gear 16, and the second gear 18 is pulled out of the heat sink 5 through the first avoidance hole 19, and the removal of the servo motor 17 is 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. When 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 slide back and forth in the rectangular ring 33 through the second connecting plate 31, and the fixed column 32 can push the rectangular ring 33 to rotate vertically. The rectangular ring 33 reciprocates in the vertical direction, and the rectangular ring 33 drives the fourth gear 29 and the second shaft 20 to rotate forward and reverse periodically through the toothed plate 30. The second 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 reciprocates in the vertical direction, the rectangular ring 33 drives the first support portion 35 to slide reciprocatingly in the vertical direction relative to the first guide column 34. The design of the first guide column 34 and the first support portion 35 allows the rectangular ring 33 to move smoothly in the vertical direction relative to the swing box 7. When the reciprocating swing structure drives the swing box 7 to swing toward one of the support seats 42, the swing box 7 first contacts the corresponding support seat 42, and 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. The pressing plate 43 is in contact with the inclined surface of the support block 38 at this time, and the first compression spring 39 is in a compressed state at this time. The first compression spring 39 applies downward pressure to the support block 38, and the bottom of the guide block 41 is tightly attached to the bottom inner wall 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 tensioned state. The elastic force generated by the tension spring 50 is smaller than the elastic force generated by the first compression spring 39. With the continuous movement of the pressing plate 43, 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 column 48. The tension spring 50 is in a tensioned state. The elastic force generated by the tension spring 50 is always smaller than the elastic force generated by the first compression spring 39. When the second support portion 47 contacts the fixed plate 49, the sealing sleeve 10 and the second filter screen 11 stop moving. With the continuous movement of the support seat 42 and the pressing plate 43, the pressing plate 43 is relative to the support block 38. 8 slides, the pressing plate 43 pushes the support block 38 to move, the support block 38 slides relative to the fixed block 36, the length of the first compression spring 39 becomes shorter, and when the support block 38 moves to the top of the pressing plate 43, the pressing plate 43 no longer contacts the inclined surface of the support block 38, and the friction 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, and the tension spring 50 drives the second support portion 47 and the sealing sleeve 10 to move in the opposite direction until the second filter screen 11 contacts the intake pipe 9, the sealing sleeve 10 and the second filter screen 11 stop moving, so that the dust on the second filter screen 11 is shaken off, and the support block 38 is pressed. The top of the plate 43 slides, and when the reciprocating swinging structure drives the swing box 7 to swing toward another support seat 42, the swing box 7 no longer presses the corresponding support seat 42, and the second compression spring 46 drives the support seat 42 and the movable column 44 to move in the opposite direction, so that the support seat 42 and the pressing plate 43 move in the opposite direction to the initial position relative to the heat dissipation box 5, and the pressing plate 43 moves in the opposite direction relative to the support block 38. When the end of the pressing plate 43 moves to 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.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 sink fan (8) is provided in the mounting shell (2); an angle adjustment mechanism for changing the tilt angle of the heat sink 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); a sealing sleeve (10) is provided on the outer sliding sleeve of the air intake pipe (9); 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).

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 3, characterized in that: 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 clutch matched with the first gear (16) is mounted on the other end of the first connecting shaft (23).

5. The transformer differential protection device according to claim 4, 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).

6. The transformer differential protection device according to claim 4, 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).

7. The transformer differential protection device according to claim 6, 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.

8. The transformer differential protection device according to claim 1, characterized in that: 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).

9. The transformer differential protection device according to claim 8, 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).

10. The transformer differential protection device according to claim 8, 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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