CN210536109U

CN210536109U - Dustproof transformer box

Info

Publication number: CN210536109U
Application number: CN201921001659.3U
Authority: CN
Inventors: 袁红
Original assignee: Changshu Sijiadeng Electric Co ltd
Current assignee: Changshu Sijiadeng Electric Co ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-05-15
Anticipated expiration: 2029-07-01

Abstract

The utility model belongs to the field of dust prevention of transformer boxes, in particular to a dust-proof transformer box, which comprises a transformer box, an air inlet mechanism and an air exhaust mechanism, wherein the air inlet mechanism and the air exhaust mechanism are respectively arranged at an air inlet and an air exhaust port on the transformer box; the air inlet mechanism and the air exhaust mechanism in the utility model can increase the air inlet speed and the air exhaust speed of the transformer box under the normal condition, thereby greatly increasing the heat dissipation speed and the heat dissipation efficiency of the transformer box; the air inlet mechanism and the air exhaust mechanism have the function of removing dust per se.

Description

Dustproof transformer box

Technical Field

The utility model belongs to the dustproof field of transformer case especially relates to a dirt-proof transformer case.

Background

The traditional transformer substation box is in an open air state, and electric equipment or electric elements arranged in the transformer substation box radiate heat by common ventilation openings distributed on the transformer substation box; the traditional transformer substation box is not provided with a dust removal device; the transformer substation box works in an environment with more dust, a lot of dust can enter the transformer substation box through the ventilation opening and is adsorbed by the electric element with static electricity, so that the heat dissipation effect of the electric element or the electric equipment is poor, and the dust adsorbed on the electric element easily causes the electric element or the electric equipment to break down. The utility model relates to a dirt-proof transformer case solves above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned defect among the prior art, the utility model discloses a dirt-proof transformer case, it adopts following technical scheme to realize.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the equipment or element indicated must have a specific position, be constructed or operated in a specific position, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

The utility model provides a dirt-proof transformer case which characterized in that: the air inlet mechanism and the air exhaust mechanism are respectively arranged at an air inlet and an air outlet on the transformer box.

The air inlet mechanism comprises a square tube A, a support bar, a filter screen A, a telescopic plate A, a transmission bar A, a spring A, a transmission bar B, a spring B, a shifting wheel, a transmission shaft, a motor A, a bevel gear combination B, a fan A, a shifting plate B and a shifting plate A, wherein the square tube A is arranged at an air inlet of the transformer box; a plurality of layers of filter screens A with denaturation capability are arranged between the two support bars which are vertically and symmetrically distributed in the square cylinder A, and the two support bars move in the opposite direction or in the opposite direction along an arc line; two transmission bars A which symmetrically and vertically slide on two side walls in the square cylinder A are respectively hinged with the side surfaces of the support bars distributed above the square cylinder A through fixedly connected telescopic plates A; each transfer strip A is provided with a spring A for resetting the transfer strip A; two transmission bars B which symmetrically and vertically slide on two side walls in the square tube A are respectively hinged with the side surfaces of the support bars distributed at the lower part in the square tube A through fixedly connected telescopic plates B; each transmission strip B is provided with a spring B for resetting the transmission strip B; a transmission shaft is arranged in the square barrel A and is vertical to the length direction of the square barrel A; two shifting wheels are symmetrically arranged on the transmission shaft, and each shifting wheel is positioned between the transmission strip A and the transmission strip B on the corresponding side wall in the square barrel A; a plurality of shifting plates B are circumferentially and uniformly distributed on the outer cylindrical surface of each shifting wheel at intervals, and the shifting plates B on each shifting wheel are matched with a plurality of shifting plates A vertically and uniformly distributed on the side surface of the corresponding transmission strip A at intervals and a plurality of shifting plates A vertically and uniformly distributed on the side surface of the corresponding transmission strip B at intervals.

The inner wall of the square barrel A is provided with a motor A, an output shaft of the motor A is in transmission connection with an input shaft of a bevel gear combination B arranged in the square barrel A, an output shaft of the bevel gear combination B is superposed with the central line of the square barrel A, and the shaft end of the output shaft of the bevel gear combination B is provided with a fan A; the fan A is positioned between the filter screen A and the bevel gear combination B; the transmission shaft is in one-way speed reduction transmission connection with an output shaft of the motor A.

The air exhaust mechanism comprises a square tube B, a support frame, a filter screen B, an elastic block, a transfer strip C, a motor B, a fan B, a spring C and a bevel gear combination C, wherein the square tube B is arranged at an air exhaust port of the transformer box; a supporting frame with a plurality of layers of filter screens B arranged inside is fixedly arranged in an outside cylinder opening of the square cylinder B; two transmission strips C which horizontally slide in the same direction are vertically distributed on a single side wall in the square tube B, and the single sliding amplitude of the two transmission strips C is different; the tail end of each transmission strip C is provided with an elastic block matched with the frame surface of the support frame; each transfer bar C is provided with a spring C for resetting the transfer bar C; the motor B is arranged in the square barrel B, and the output shaft of the motor B is in transmission connection with the input shaft of the bevel gear combination C arranged in the square barrel B; the output shaft of the bevel gear combination C is vertical to the screen surface of the filter screen B; a fan B is arranged at the shaft end of an output shaft of the bevel gear combination C and is positioned between the bevel gear combination C and the supporting frame; the output shaft of the motor B is connected with the two transmission bars C in a unidirectional driving mode through a series of transmission to move horizontally.

As a further improvement of the technology, two arc guide blocks are symmetrically installed at two ends of each support bar, and the arc guide blocks at two ends of each support bar respectively slide in the arc guide grooves on the corresponding side walls in the square cylinder a, and the arc guide blocks at two ends of each support bar are matched with the two arc guide grooves at two sides, so that the support bars move oppositely along the arc guide grooves, and meanwhile, the outlet of air passing through the filter screen a is reduced, the speed of the air passing through the filter screen a is increased to a certain extent, and the capability of taking away dust on the filter screen a from the air passing through the filter screen a is improved; two guide rails A are symmetrically arranged on two side walls in the square barrel A, and each guide rail A is vertically provided with two trapezoidal guide grooves A which are parallel to each other; each transfer strip A is provided with a trapezoidal guide block A, and each transfer strip B is provided with a trapezoidal guide block B; the transfer strip A and the transfer strip B which are positioned on the same side in the square barrel A vertically slide on the guide rail A on the same side, and the trapezoidal guide block A on the transfer strip A and the trapezoidal guide block B on the transfer strip B vertically slide in the two trapezoidal guide grooves A on the guide rail A on the same side respectively. The trapezoidal guide groove A is matched with the trapezoidal guide block A and the trapezoidal guide block B to play a role in positioning and guiding the vertical movement of the transfer strip A and the transfer strip B on the inner side wall of the square tube A.

As a further improvement of the technology, the transmission shaft is arranged in the square cylinder A through a fixed seat A matched with the transmission shaft through a bearing; the bevel gear combination B is arranged in the square tube A through a fixed seat I matched with an input shaft bearing of the bevel gear combination B and a fixed seat H matched with an output shaft bearing of the bevel gear combination B; the bevel gear combination A is arranged in the square cylinder A through a fixed seat B matched with an output shaft bearing of the bevel gear combination A and a fixed seat C matched with an input shaft bearing of the bevel gear combination A; the output shaft of the bevel gear combination A is provided with a one-way clutch A, and the outer ring of the one-way clutch A is provided with a gear B; the gear B is meshed with a gear A arranged on the transmission shaft; the speed reducer is installed in the square cylinder A through the fixing seat D, and an output shaft of the speed reducer is in transmission connection with an input shaft of the bevel gear combination A; the input shaft of the speed reducer is matched with a bearing of a fixed seat E arranged in the square cylinder A; a gear C is arranged on an input shaft of the speed reducer and meshed with a gear D arranged on the fixed seat E, and the gear D is positioned above the gear C; an output shaft of the motor A is matched with a bearing of the fixing seat E, and a gear E meshed with the gear D is installed on the output shaft of the motor A. The fixing seat E provides a supporting point for the output shaft of the motor A, and prevents the output shaft of the motor A from driving the transmission part in the motor A to generate relative motion with larger amplitude when the motor A encounters larger vibration, so that the transmission part in the motor A is prevented from being damaged under the condition of larger relative motion amplitude.

As a further improvement of the technology, two guide rails B are vertically distributed on the side wall of the square tube B in which the transfer strips C are sliding, and the two transfer strips C respectively horizontally slide on the two guide rails B; each transfer strip C is provided with a trapezoidal guide block C, and the trapezoidal guide block C on each transfer strip slides in the trapezoidal guide groove B on the corresponding guide rail B. The cooperation of trapezoidal guide block C and trapezoidal guide slot B plays the positioning guide effect to the motion of transfer strip C along square tube B inside wall.

As a further improvement of the technology, the bevel gear combination C is installed in the square cylinder B through a fixed seat H matched with an output shaft bearing of the bevel gear combination C and a fixed seat I matched with an input shaft bearing of the bevel gear combination C.

As a further improvement of the present technology, a one-way clutch B is mounted on the output shaft of the motor B, and a gear F is mounted on the outer ring of the one-way clutch B.

As a further improvement of the technology, four gears G which are sequentially meshed are vertically arranged in the square cylinder B, and the four gears G are positioned between the two transmission strips C; the gear G at the uppermost end is matched with a toothed plate A arranged on the upper transfer strip C; the gear G at the lowest end is matched with a toothed plate B arranged on a lower transfer strip C; the gear F meshes with one of the gears G.

As the further improvement of this technique, the effective meshing length of the same corresponding gear G of above-mentioned pinion rack A is different with the effective meshing length of the same corresponding gear G of pinion rack B, guarantees that two transmission strip C successively form twice striking to the carriage at the quick in-process that resets, and under two consecutive striking, the dust that adsorbs on filter screen B can be shaken to the greatest extent and fall and is taken away by the air current of the transformer case that fan B discharged.

As a further improvement of the technology, two fixing plates are vertically arranged on the side wall of the square tube B, in which the transfer strips C are arranged, and the two fixing plates are respectively positioned at the tail ends of the two transfer strips C; the spring C installed on the transmission bar C is positioned at the tail end of the transmission bar C; one end of the spring C is connected with the end face of the tail end of the corresponding transmission strip C, and the other end of the spring C is connected with the corresponding fixing plate.

As a further improvement of the present technology, the bevel gear combination a, the bevel gear combination B, and the bevel gear combination C are each composed of two meshed bevel gears whose rotation axes are at an angle of 90 degrees to each other.

The deformable filter screen A is favorable for the opposite movement of the two support bars, the actual air vent caliber after the opposite movement of the two support bars is reduced, the actual air speed of the filter screen A passes through a plurality of layers of filter screens A can be enhanced, dust adsorbed on the filter screen A is taken out of the air inlet mechanism, and the dust removal of the air inlet mechanism is effectively completed.

The interval distribution between the adjacent two shifting plates A on the shifting wheel is proper, the interval distribution between the adjacent two shifting plates B on the transmission strip A is proper, the interval distribution between the adjacent two shifting plates B on the transmission strip B is proper, the vibration amplitude of the transmission strip A and the vibration amplitude of the transmission strip B which drive corresponding support bars through the expansion plate A and the expansion plate B are ensured to be large enough, and then the vibration amplitude of the two support bars which drive a plurality of layers of filter screens A is large enough, and dust adsorbed on the filter screens A is shaken off and taken away by the passing high-speed airflow to the maximum extent.

Compared with the traditional transformer substation box, the air inlet mechanism and the air exhaust mechanism in the utility model can increase the air inlet speed and the air exhaust speed of the transformer substation box under normal conditions, thereby increasing the heat dissipation speed and the heat dissipation efficiency of the transformer substation box; the air inlet mechanism and the air exhaust mechanism have the function of removing dust; when dust removal is needed, the control system controls a motor A of the air inlet mechanism and a motor B of the air exhaust mechanism to rotate reversely, so that a fan A of the air inlet mechanism and a fan B of the air exhaust mechanism synchronously rotate reversely, and the fan A of the air inlet mechanism and the fan B of the air exhaust mechanism respectively exhaust air and intake air to the power transformation box; in the air exhaust process of the air intake mechanism, a filter screen A in the air intake mechanism is subjected to bending deformation under the opposite arc motion of the two support bars, and the deformation of the filter screen A enables the surface of the filter screen A to be contracted or tensioned, so that dust attached to the screen surface of the filter screen A is separated from the screen surface of the filter screen A; meanwhile, the two support bars moving in opposite directions reduce the outlet of the airflow actually flowing through the filter screen A, the air pressure of the internal airflow is increased to a certain extent, the flow speed of the airflow passing through the filter screen A is increased, the increased airflow passes through the filter screen A and takes away the dust separated from the filter screen A, and the dust on the filter screen A is effectively cleaned; in the process that the air exhaust mechanism is converted from an air suction state to a normal air exhaust state, elastic blocks on two transfer strips C in the air exhaust mechanism respectively impact the frame surface of a support frame provided with a plurality of layers of filter screens B in sequence, impact vibration causes dust attached to the filter screens B to fall off, and the falling dust is blown out of the air exhaust mechanism along with air exhaust of a fan B in the air exhaust mechanism, so that dust removal of the air exhaust mechanism is realized; the air inlet mechanism and the air exhaust mechanism accelerate the circulation speed of the heat dissipation air in the transformer box and simultaneously effectively filter the heat dissipation pneumatic air entering the transformer box, so that dust attached to the electric elements in the transformer box is reduced to the maximum extent, and the service life of the electric elements in the transformer box is further effectively prolonged; the air inlet mechanism and the air exhaust mechanism can automatically realize self dust removal without manually disassembling the air inlet mechanism and the air exhaust mechanism to clean dust, so that the damage to internal electric elements caused by disassembling the power transformation box is avoided, and the working efficiency of dust removal in the power transformation box is effectively improved; in addition, in the dust removing process of the air inlet mechanism, the filter screens A are bent and deformed, so that the distance between every two adjacent filter screens A is increased, dust can easily fall off from the space between every two adjacent filter screens A, and the dust can be smoothly blown off from the filter screens A; the utility model discloses simple structure has better result of use.

Drawings

Fig. 1 is an overall perspective schematic view of a transformer box.

Fig. 2 is a schematic sectional view of the air intake mechanism.

Fig. 3 is a schematic section view showing the cooperation of a fixing seat a, a transmission shaft, a dial wheel, a transmission strip a, a gear B, a one-way clutch a, a fixing seat B and a bevel gear combination a in the air intake mechanism.

Fig. 4 is a schematic cross-sectional view of the square cylinder a, the bevel gear combination a, the fixing seat C, the reducer and the fixing seat D in the air intake mechanism.

FIG. 5 is a schematic cross-sectional view of the intake mechanism showing the arrangement of the dial wheel, the dial plate A, the dial plate B, the transmission bar A and the transmission bar B.

Fig. 6 is a schematic cross-sectional view of the air inlet mechanism, which is composed of a square tube a, a support strip, an expansion plate a, a transmission strip a and a spring a.

FIG. 7 is a schematic cross-sectional view of the air intake mechanism, which is composed of a square tube A, a support bar, a retractable plate B, a transmission bar B, a shifting plate A, a shifting wheel and a spring B.

Fig. 8 is a perspective view of the square tube a and its schematic sectional view.

FIG. 9 is a cross-sectional view of the square tube A, the guide rail A, the transmission strip B and the thumb wheel.

Fig. 10 is a schematic view of the transmission fit in the air intake mechanism.

Fig. 11 is a schematic sectional view of the air discharging mechanism.

FIG. 12 is a sectional view of the exhaust mechanism showing the square tube B, the support frame, the elastic block, the transmission strip C, the gear F, the gear G, and the one-way clutch B.

Fig. 13 is a schematic cross-sectional view of the square tube B, the support frame, the elastic block, the transfer strip C, the gear F, the gear G, the one-way clutch B, the motor B, and the guide rail B in the exhaust mechanism.

Fig. 14 is a schematic sectional view of the guide rail a.

Figure 15 is a schematic view of the internal drive engagement of the venting mechanism.

Fig. 16 is a perspective schematic view of the guide rail B.

Fig. 17 is a simplified illustration of the support bar movement and screen a deformation.

Number designation in the figures: 1. a power transformation box; 2. an air inlet mechanism; 3. an air exhaust mechanism; 4. a square cylinder A; 5. an arc-shaped guide groove; 6. a supporting strip; 7. an arc-shaped guide block; 8. a filter screen A; 9. a retractable plate A; 10. a transfer bar A; 11. a trapezoidal guide block A; 12. a spring A; 13. a telescopic plate B; 14. a transfer bar B; 15. a trapezoidal guide block B; 16. a spring B; 17. a thumb wheel; 18. a drive shaft; 19. a gear A; 20. a gear B; 21. a one-way clutch A; 23. a bevel gear combination A; 24. a speed reducer; 25. a gear C; 26. a gear D; 27. a gear E; 28. a motor A; 29. a bevel gear combination B; 30. a fan A; 31. a fixed seat A; 32. a fixed seat B; 33. a fixed seat C; 34. a fixed seat D; 35. a fixed seat E; 36. a fixed seat F; 37. a fixed seat G; 38. a guide rail A; 39. a trapezoidal guide groove A; 40. a pulling plate B; 41. a plate A is poked; 42. a square cylinder B; 43. a support frame; 44. a filter screen B; 45. an elastic block; 46. a transfer bar C; 47. a trapezoidal guide block C; 48. a guide rail B; 49. a toothed plate A; 50. a toothed plate B; 51. a gear G; 52. a gear F; 53. a one-way clutch B; 54. a motor B; 55. a fan B; 56. a spring C; 57. a fixing plate; 58. a trapezoidal guide groove B; 59. a fixed seat H; 60. a fixed seat I; 61. and (5) combining the bevel teeth.

Detailed Description

The attached drawings are schematic diagrams of the implementation of the present invention in order to understand the structural operation principle. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, the wind power generation system comprises a power transformation box 1, a wind inlet mechanism 2 and an air exhaust mechanism 3, wherein the wind inlet mechanism 2 and the air exhaust mechanism 3 are respectively arranged at a wind inlet and a wind outlet on the power transformation box 1.

As shown in fig. 2, the air intake mechanism 2 includes a square tube a4, a support bar 6, a filter screen A8, a telescopic plate a9, a transmission bar a10, a spring a12, a transmission bar B14, a spring B16, a thumb wheel 17, a transmission shaft 18, a motor a28, a bevel gear combination B29, a fan a30, a thumb plate B40, and a thumb plate a41, wherein as shown in fig. 1, the square tube a4 is installed at an air intake of the power transformation box 1; as shown in fig. 6, 8 and 10, a plurality of layers of filter screens A8 with degeneration capability are arranged between two support bars 6 which are vertically and symmetrically distributed in a square cylinder a4, and the two support bars 6 move towards or away from each other along an arc line; as shown in fig. 6 and 10, two transmission bars a10 symmetrically and vertically sliding on two side walls in the square cylinder a4 are hinged with the side surfaces of the support bars 6 distributed on the upper part in the square cylinder a4 through fixedly connected expansion plates a9 respectively; each transmission bar A10 is provided with a spring A12 for resetting the transmission bar A10; as shown in fig. 7 and 10, two transmission bars B14 symmetrically and vertically sliding on two side walls in the square cylinder a4 are hinged with the side surfaces of the support bars 6 distributed at the lower part in the square cylinder a4 through fixedly connected expansion plates B13 respectively; each transmission bar B14 is provided with a spring B16 for resetting the transmission bar B14; as shown in fig. 2 and 3, the transmission shaft 18 is installed in the square tube a4, and the transmission shaft 18 is perpendicular to the length direction of the square tube a 4; two thumb wheels 17 are symmetrically arranged on the transmission shaft 18; as shown in fig. 9 and 10, each of the thumb wheels 17 is located between the transfer bar a10 and the transfer bar B14 on the corresponding side wall in the square tube a 4; as shown in fig. 5 and 7, a plurality of shifting plates B40 are circumferentially and uniformly distributed on the outer cylindrical surface of each shifting wheel 17 at intervals, and a plurality of shifting plates B40 on each shifting wheel 17 are matched with a plurality of shifting plates a41 vertically and uniformly distributed on the side surface of a corresponding transfer bar a10 at intervals and a plurality of shifting plates a41 vertically and uniformly distributed on the side surface of a corresponding transfer bar B14 at intervals.

As shown in fig. 2 and 10, a motor a28 is mounted on the inner wall of the square cylinder a4, and an output shaft of the motor a28 is in transmission connection with an input shaft of a bevel gear combination B29 mounted in the square cylinder a 4; as shown in fig. 2 and 10, an output shaft of the bevel gear combination B29 is overlapped with the central line of the square cylinder a4, and a fan a30 is mounted at the shaft end of the output shaft of the bevel gear combination B29; fan a30 is located between screen A8 and cone combination B29; the transmission shaft 18 is in one-way speed reduction transmission connection with the output shaft of the motor A28.

As shown in fig. 11, the exhaust mechanism 3 includes a square tube B42, a support frame 43, a filter screen B44, an elastic block 45, a transfer bar C46, a motor B54, a fan B55, a spring C56, and a cone-tooth combination C61, wherein as shown in fig. 1, the square tube B42 is installed at an exhaust port of the power transformation box 1; as shown in fig. 12, the supporting frame 43 with several layers of filter screens B44 inside is fixed in the outer opening of the square tube B42; as shown in fig. 11 and 13, two transmission bars C46 which slide horizontally in the same direction are vertically distributed on a single side wall in the square tube B42, and the single sliding amplitudes of the two transmission bars C46 are different; the end of each transfer bar C46 is provided with an elastic block 45 which is matched with the frame surface of the supporting frame 43; each transmission bar C46 is provided with a spring C56 for resetting the transmission bar C46; as shown in fig. 11, the motor B54 is installed in the square cylinder B42, and its output shaft is in transmission connection with the input shaft of the bevel gear combination C61 installed in the square cylinder B42; the output shaft of the bevel gear combination C61 is vertical to the screen surface of the screen B44; as shown in fig. 15, a fan B55 is mounted at the output shaft end of the bevel gear combination C61, and the fan B55 is located between the bevel gear combination C61 and the support frame 43; the output shaft of the motor B54 unidirectionally drives the two transmission bars C46 to move horizontally through a series of transmission connections.

As shown in fig. 8 and 10, two arc-shaped guide blocks 7 are symmetrically installed at two ends of each support bar 6, and the arc-shaped guide blocks 7 at two ends of each support bar 6 respectively slide in the arc-shaped guide grooves 5 on the corresponding side walls in the square cylinder a4, the cooperation between the arc-shaped guide blocks 7 at two ends of each support bar 6 and the two arc-shaped guide grooves 5 at two sides enables the support bars 6 to move towards each other along the arc-shaped guide grooves 5 while reducing the outlet of air passing through the filter screen A8, and to increase the speed of air passing through the filter screen A8 to a certain extent, thereby increasing the ability of air passing through the filter screen A8 to take away dust on the filter screen A8; as shown in fig. 9 and 14, two guide rails a38 are symmetrically mounted on two side walls in the square tube a4, and each guide rail a38 is vertically provided with two trapezoidal guide grooves a39 which are parallel to each other; as shown in fig. 9 and 10, each transfer bar a10 is provided with a trapezoidal guide block a11, and each transfer bar B14 is provided with a trapezoidal guide block B15; the transfer bar A10 and the transfer bar B14 which are positioned on the same side in the square tube A4 vertically slide on the guide rail A38 on the same side, and the trapezoidal guide block A11 on the transfer bar A10 and the trapezoidal guide block B15 on the transfer bar B14 vertically slide in the two trapezoidal guide grooves A39 on the guide rail A38 on the same side respectively. The cooperation of the trapezoidal guide groove A39 and the trapezoidal guide block A11 and the trapezoidal guide block B15 plays a positioning and guiding role in the vertical movement of the transfer bar A10 and the transfer bar B14 on the inner side wall of the square tube A4.

As shown in fig. 2 and 3, the transmission shaft 18 is mounted in the square tube a4 through a fixing seat a31 bearing-fitted with the transmission shaft; the bevel gear combination B29 is arranged in the square cylinder A4 through a fixed seat I60 matched with an input shaft bearing of the bevel gear combination B29 and a fixed seat H59 matched with an output shaft bearing of the bevel gear combination B; as shown in fig. 3 and 4, the bevel gear combination a23 is installed in the square cylinder a4 through a fixed seat B32 matched with the output shaft bearing and a fixed seat C33 matched with the input shaft bearing; as shown in fig. 3 and 10, a one-way clutch a21 is mounted on an output shaft of the bevel gear combination a23, and a gear B20 is mounted on an outer ring of the one-way clutch a 21; gear B20 meshes with gear a19 mounted on drive shaft 18; as shown in fig. 2 and 4, the speed reducer 24 is installed in the square cylinder a4 through a fixed seat D34, and an output shaft of the speed reducer 24 is in transmission connection with an input shaft of a bevel gear combination a 23; the input shaft of the speed reducer 24 is in bearing fit with a fixed seat E35 arranged in a square cylinder A4; a gear C25 is installed on an input shaft of the speed reducer 24, a gear C25 is meshed with a gear D26 installed on a fixed seat E35, and the gear D26 is positioned above a gear C25; the output shaft of the motor A28 is matched with the bearing of the fixed seat E35, and the output shaft of the motor A28 is provided with a gear E27 meshed with the gear D26. The fixing seat E35 provides a supporting point for the output shaft of the motor A28, so that the output shaft of the motor A28 is prevented from driving the transmission part in the motor A28 to move relatively to a large extent when meeting large vibration, and the transmission part in the motor A28 is prevented from being damaged under the condition of large relative movement amplitude.

As shown in fig. 11 and 16, two guide rails B48 are vertically distributed on the side wall of the square tube B42 in which the transfer bar C46 is sliding, and the two transfer bars C46 respectively slide on the two guide rails B48 horizontally; each transfer bar C46 has a trapezoidal guide block C47 mounted thereon, and the trapezoidal guide block C47 of each transfer bar slides in the trapezoidal guide groove B58 of the corresponding guide rail B48. The cooperation of the trapezoid guide block C47 and the trapezoid guide groove B58 plays a positioning and guiding role in the movement of the transmission bar C46 along the inner side wall of the square tube B42.

As shown in fig. 11, the bevel gear assembly C61 is mounted in the square tube B42 via a fixing seat H59 engaged with the output shaft bearing and a fixing seat I60 engaged with the input shaft bearing.

As shown in fig. 11 and 12, a one-way clutch B53 is attached to the output shaft of the motor B54, and a gear F52 is attached to the outer race of the one-way clutch B53.

As shown in fig. 11 and 12, four gears G51 which are meshed in sequence are vertically installed in the square tube B42, and four gears G51 are located between two transfer bars C46; the uppermost gear G51 mates with a toothed plate a49 mounted on the upper transfer bar C46; the lowermost gear G51 mates with a toothed plate B50 mounted on the lower transfer bar C46; the gear F52 meshes with one of the gears G51.

As shown in fig. 12, 13 and 15, the effective meshing length of the toothed plate a49 and the corresponding gear G51 is different from the effective meshing length of the toothed plate B50 and the corresponding gear G51, so that two impact actions of the two transfer strips C46 on the support frame 43 in the quick return process are ensured, and under two continuous impact actions, dust adsorbed on the filter screen B44 can be shaken down to the maximum extent and carried away by the airflow discharged from the transformer case 1 by the fan B55.

As shown in fig. 11, 12 and 13, two fixing plates 57 are vertically mounted on the side wall of the square tube B42 in which the transfer bar C46 is sliding, and the two fixing plates 57 are respectively located at the ends of the two transfer bars C46; the spring C56 mounted on the transfer bar C46 is located at the end of the transfer bar C46; one end of the spring C56 is connected to the end face of the corresponding transmission bar C46, and the other end is connected to the corresponding fixing plate 57.

As shown in fig. 10 and 11, each of the bevel gear combination a23, the bevel gear combination B29, and the bevel gear combination C61 is formed by two bevel gears in which two rotation axes thereof are engaged with each other at an angle of 90 degrees.

As shown in fig. 17, the filter screen A8 can be deformed to facilitate the movement of the two support bars 6 in opposite directions, the actual aperture of the vent is reduced after the two support bars 6 move in opposite directions, the actual air velocity passing through the plurality of layers of filter screens A8 is increased, and the dust adsorbed on the filter screen A8 is carried out of the air intake mechanism 2 and the dust removal of the air intake mechanism 2 is effectively completed; and the space between the deformed filter screens A8 is increased, which is beneficial to the dust on the filter screens A8 to fall and be blown away.

As shown in fig. 5, the spacing distribution between two adjacent shifting plates a41 on the shifting wheel 17 is proper, the spacing distribution between two adjacent shifting plates B40 on the transfer bar a10 is proper, and the spacing distribution between two adjacent shifting plates B40 on the transfer bar B14 is proper, so that it is ensured that the vibration amplitude of the corresponding support bars 6 driven by the transfer bar a10 and the transfer bar B14 through the expansion plate a9 and the expansion plate B13 is large enough, and further, the vibration amplitude of the filter screens A8 driven by the two support bars 6 is large enough, and dust adsorbed on the filter screens A8 is shaken off to the maximum and is taken away by passing high-speed airflow.

The utility model provides an install electrical element in transformer case 1.

The utility model discloses well filter screen A8 and filter screen B44 all adopt prior art.

The one-way clutch A21 of the utility model has the function that when the air inlet mechanism 2 supplies air to the transformer box 1, the one-way clutch A21 plays an overrunning role; when the air inlet mechanism 2 exhausts air to the outside of the transformer box 1, the one-way clutch A21 plays a one-way driving role, at the moment, the motor A28 drives the two shifting wheels 17 to rotate through a series of transmission connection, the shifting plates A41 on the two shifting wheels 17 respectively interact with the shifting plates B40 on the corresponding transmission bars A10 and transmission bars B14 and drive the transmission bars A10 and B14 to move oppositely, and the two transmission bars A10 and the two transmission bars B14 respectively drive the two support bars 6 to move oppositely along the arc-shaped guide grooves 5 on the inner wall of the square tube A4; when the thumb wheel 17 drives the transfer strip A10 and the transfer strip B14 to move to the limit, the two support bars 6 just move to the limit positions of the corresponding arc-shaped guide grooves 5, and a plurality of layers of filter screens A8 arranged between the two support bars 6 are bent and deformed; because the spacing distribution between two adjacent shifting plates A41 on the shifting wheel 17 is proper, the spacing distribution between two adjacent shifting plates B40 on the transmission strip A10 is proper, and the spacing distribution between two adjacent shifting plates B40 on the transmission strip B14 is proper, the shifting wheel 17 which continuously rotates can continuously shift the shifting plate B40 at the uppermost end of the corresponding transmission strip A10 and the shifting plate B40 at the lowermost end of the corresponding transmission strip B14, under the action of the spring A12 and the spring B16, the transmission strip A10 and the transmission strip B14 generate repeated high-frequency up-and-down vibration, and the two transmission strips A10 and the two transmission strips B14 respectively drive the two support strips 6 to generate repeated high-frequency vibration, so that the filter screen A8 generates repeated high-frequency vibration of bending, straightening, bending and high-frequency vibration, and dust attached to the filter screen A8 is separated from the filter screen A8 and is taken away by high-speed air flow passing through the filter screen A8.

The function of the one-way clutch B53 in the utility model is that when the exhaust mechanism 3 exhausts air to the outside of the transformer box 1, the one-way clutch B53 plays an overrunning role; when the exhaust mechanism 3 sucks air into the transformer box 1, the one-way clutch B53 plays a one-way driving role, and at the moment, the motor B54 drives the two transfer strips C46 to move towards the direction far away from the frame surface of the support frame 43 through a series of transmission connection; the two elastic blocks 45 are quickly separated from the supporting frame 43; since the effective meshing lengths of the toothed plates a49 and B50 and the corresponding gears G51 are different, respectively, after the two transfer bars C46 move to the extreme position, the continuously rotating gears G51 continuously poke the end teeth of the toothed plates a49 and B50, so that the two transfer bars C46 remain substantially stationary away from the position of the support frame 43; the distance between each elastic block 45 on the two transfer strips C46 and the supporting frame 43 is kept basically unchanged; when the exhaust mechanism 3 exhausts to the outside of the transformer box 1 from the direction of air suction to the inside of the transformer box 1, the motor B54 rotates reversely, the motor B54 drives the fan B55 to rotate reversely through the combination of the conical teeth and exhaust to the outside of the transformer box 1, meanwhile, the output shaft of the motor B54 drives the inner ring of the one-way clutch B53 to rotate at a high speed, and because the one-way clutch B53 plays an overrunning role at the moment, the output shaft of the motor B54 drives the inner ring of the one-way clutch B53 to rotate at a high speed; the inner ring of the one-way clutch B53 cannot drive the outer ring to synchronously rotate; under the reset action of the two springs C56, the two transmission bars C46 drive the corresponding elastic blocks 45 to rapidly move to the initial positions; the two transfer bars C46 drive the four gears G51 to rotate through the toothed plate a49 and the toothed plate B50, respectively, and the gear G51 engaged with the gear F52 drives the gear F52 to rotate; the gear F52 drives the outer ring of the one-way clutch B53 to rotate along with the inner ring of the one-way clutch B53; two elastic blocks 45 at a distance from different distances of the supporting frame 43 successively form quick impact on the supporting bar 6 and reset instantly, the impact vibration of the two elastic blocks 45 on the supporting frame 43 causes dust on the filter screen B44 to fall off, and the falling dust is taken away by the airflow of the high-speed discharge power transformation box 1, so that the effective dust removal of the exhaust mechanism 3 is realized, and meanwhile, the exhaust is continued to the power transformation box 1.

The utility model provides an air inlet mechanism 2 and exhaust mechanism 3's operation interval is 1 ~ 2 days, and air inlet mechanism 2 and exhaust mechanism 3's operation interval is controlled by control system, and control system's control adopts prior art.

The utility model discloses a work flow: in an initial state, the transfer bar A10 is positioned at the top end of the corresponding trapezoidal guide groove A39, the transfer bar B14 is positioned at the bottom of the corresponding trapezoidal guide groove A39, the two support bars 6 are respectively positioned at the top and the bottom in the square cylinder A4, and the layers of filter screens A8 are in a stretching state; the two elastic blocks 45 are simultaneously contacted with the frame surface of the supporting frame 43, and the toothed plate A49 and the toothed plate B50 are respectively meshed with the corresponding gears G51; the two springs C56 are in a compressed state, so that the force of the transfer bar C46 driving the elastic block 45 to impact the supporting frame 43 is large enough to shake off dust on the filter screen B44.

When the normal circulation heat dissipation is carried out on the transformer box 1, the control system controls the motor A28 and the motor B54 to synchronously operate, so that the air inlet mechanism 2 and the air exhaust mechanism 3 respectively carry out air supply and air exhaust on the transformer box 1; when the air inlet mechanism 2 supplies air to the transformer box 1, the motor A28 drives the fan A30 to rotate forward through the bevel gear combination B29 connected with the motor A28, and the fan A30 supplies air to the transformer box 1; meanwhile, a gear E27 arranged on an output shaft of the motor A28 drives an inner ring of a one-way clutch A21 to rotate sequentially through a gear D26, a gear C25, a speed reducer 24 and a bevel gear combination A23, and at the moment, the one-way clutch A21 plays an overrunning role, and the inner ring cannot drive the outer ring to rotate; the outer ring of the one-way clutch A21 cannot drive the two shifting wheels 17 to rotate through the gear B20, the gear A19 and the transmission shaft 18, the two shifting wheels 17 cannot drive the corresponding transmission bar A10 and the transmission bar B14 to move, the support bar 6 cannot move, and the filter screen A8 cannot vibrate; at this time, the plurality of screens A8 filter the air sent into the transformer tank 1. When the air exhaust mechanism 3 exhausts air to the outside of the transformer box 1, the motor B54 drives the fan B55 to rotate forward and fast through the bevel gear combination C61, and the fan B55 exhausts the air carrying heat in the transformer box 1 out of the transformer box 1 through the filter screen B44; meanwhile, the output shaft of the motor B54 drives the inner ring of the one-way clutch B53 to rotate at a high speed, and the inner ring of the one-way clutch B53 cannot drive the outer ring of the one-way clutch B53 to rotate because the one-way clutch B53 plays an overrunning role at the moment, so that the gear F52 cannot be driven to rotate; the gear F52 does not drive the two transfer bars C46 to move through a series of transmission connections, and the two elastic blocks 45 continue to maintain contact with the supporting frame 43; the exhaust mechanism 3 at this time assists only in exhausting the air carrying heat in the transformer box 1.

When the air inlet mechanism 2 and the air exhaust mechanism 3 respectively supply air and exhaust air for 1-2 days, the filter screen A8 and the filter screen B44 in the air inlet mechanism 2 and the air exhaust mechanism 3 need to be dedusted; at the moment, the motor A28 in the air inlet mechanism 2 and the motor B54 in the air exhaust mechanism 3 are controlled by the control system to run in reverse.

The motor A28 drives the fan A30 to rotate reversely through the bevel gear combination B29, and the reversely rotating fan A30 exhausts air to the outside of the transformer box 1; a gear E27 arranged on an output shaft of the motor A28 drives an inner ring of a one-way clutch A21 to rotate sequentially through a gear D26, a gear C25, a speed reducer 24 and a bevel gear combination A23; at the moment, the one-way clutch A21 plays a one-way driving role, so that the inner ring drives the outer ring to synchronously rotate, and the outer ring of the one-way clutch A21 sequentially passes through the gear B20, the gear A19 and the transmission shaft 18 to drive the two thumb wheels 17 to rotate; the shifting plates A41 on the two shifting wheels 17 respectively act on the shifting plates B40 on the corresponding transmission bars A10 and transmission bars B14, so that the two transmission bars A10 and the two transmission bars B14 respectively drive the two support bars 6 to move oppositely along the arc-shaped guide grooves 5 on the inner wall of the square cylinder A4, the two springs A12 and the two springs B16 are stretched and store energy, the two expansion plates A9 and the two expansion plates B13 are gradually extended simultaneously, the two support bars 6 rotate around the arc centers of the arc-shaped guide grooves 5 while moving along the corresponding two arc-shaped guide grooves 5, and the filter screens A8 in a plurality of layers are bent and deformed to different degrees under the compression of the two support bars 6; when the dial plate A41 on the dial wheel 17 interacts with the dial plate B40 at the uppermost end of the corresponding transmission bar A10 and the dial plate B40 at the lowermost end of the corresponding transmission bar B14, the dial wheel 17 which continuously rotates continuously dials the dial plate B40 at the uppermost end of the corresponding transmission bar A10 and the dial plate B40 at the lowermost end of the corresponding transmission bar B14 through a plurality of dial plates A41 which are distributed at equal intervals; under the action of the two springs A12 and the two springs B16, the two transmission bars A10 and the two transmission bars B14 respectively drive the two support bars 6 to repeatedly slide along the corresponding arc-shaped guide grooves 5 at high frequency and to rotate around the arc centers of the corresponding arc-shaped guide grooves 5 in a reciprocating manner to form high-frequency reciprocating vibration, and the filter screens A8 of a plurality of layers are driven by the two support bars 6 to repeatedly stretch and bend to form high-frequency vibration; the dust attached to the filter screen A8 partially falls off under the action of contraction and tightening of the screen surfaces on the two sides of the filter screen A8, meanwhile, the dust attached to the filter screen A8 is completely separated from the filter screen A8 through the stretching, bending, reciprocating and high-frequency vibration of the filter screen A8, and the fallen dust is discharged by high-speed airflow passing through the filter screen A8, so that the dust removal of the air inlet mechanism 2 is realized.

Meanwhile, the motor B54 drives the fan B55 to rotate reversely through the bevel gear combination C61, and the reversely rotating fan B55 supplies air into the transformer box 1; at the moment, the one-way clutch B53 plays a one-way driving role, and the output shaft of the motor B54 drives the outer ring thereof to synchronously rotate through the inner ring of the one-way clutch B53; the outer ring of the one-way clutch B53 drives the toothed plate a49 and the toothed plate B50 to move away from the support frame 43 through the gear F52 and the four gears G51 respectively; the toothed plate a49 drives the upper transfer bar C46 to move in a direction away from the support frame 43, and the toothed plate B50 drives the lower transfer bar C46 to move in a direction away from the support frame 43; the two elastic blocks 45 are driven by the two transfer bars C46 to separate from the supporting frame 43 and synchronously move in the direction away from the supporting frame 43, and the two springs C56 are stretched and store energy; since the effective meshing lengths of the tooth plates a49 and B50 and the corresponding gears G51 are different, the two elastic blocks 45 are at different distances from the support frame 43 after the two transfer bars C46 move to the extreme position; the gear G51, which rotates continuously, continuously toggles the end teeth of the tooth plates a49 and B50 so that the two transfer bars C46 remain substantially stationary away from the position of the support frame 43; the distance between the elastic blocks 45 on the two transfer strips C46 and the supporting frame 43 is kept substantially constant.

When the exhaust mechanism 3 exhausts to the outside of the transformer box 1 from the direction of air suction to the inside of the transformer box 1, the motor B54 rotates reversely, the motor B54 drives the fan B55 to rotate reversely through the bevel gear combination C61 and exhaust to the outside of the transformer box 1, meanwhile, the output shaft of the motor B54 drives the inner ring of the one-way clutch B53 to rotate at a high speed, and the output shaft of the motor B54 drives the inner ring of the one-way clutch B53 to rotate at a high speed because the one-way clutch B53 plays an overrunning role at the moment; the inner ring of the one-way clutch B53 cannot drive the outer ring to synchronously rotate; under the reset action of the two springs C56, the two transmission bars C46 drive the corresponding elastic blocks 45 to rapidly move to the initial positions; the two transfer bars C46 drive the four gears G51 to rotate through the toothed plate a49 and the toothed plate B50, respectively, and the gear G51 engaged with the gear F52 drives the gear F52 to rotate; the gear F52 drives the outer ring of the one-way clutch B53 to rotate along with the inner ring of the one-way clutch B53; two elastic blocks 45 at a distance from different distances of the supporting frame 43 successively form quick impact on the supporting bar 6 and reset instantly, the impact vibration of the two elastic blocks 45 on the supporting frame 43 causes dust on the filter screen B44 to fall off, and the falling dust is taken away by the airflow of the high-speed discharge power transformation box 1, so that the effective dust removal of the exhaust mechanism 3 is realized, and meanwhile, the exhaust is continued to the power transformation box 1.

When the air inlet mechanism 2 exhausts air to the outside of the transformer box 1 and turns to suck air into the transformer box 1, the motor A28 rotates reversely, the motor A28 drives the fan A30 to rotate reversely through the bevel gear combination B29 and supplies air into the transformer box 1, and meanwhile, the gear E27 arranged on the output shaft of the motor A28 drives the inner ring of the one-way clutch A21 to rotate reversely through the gear D26, the gear C25, the speed reducer 24 and the bevel gear combination A23 in sequence; at the moment, the one-way clutch A21 plays an overrunning role, so that the inner ring of the one-way clutch A21 cannot drive the outer ring to reversely rotate, and the outer ring does not hinder the reverse rotation of the inner ring; under the reset action of the spring A12 and the spring B16, the two transmission bars A10 and the two transmission bars B14 interact with the shifting plate A41 on the shifting wheel 17 through the shifting plate B40 on the two transmission bars A14 and drive the two shifting wheels 17 to rotate reversely, and the two shifting wheels 17 drive the outer ring of the one-way clutch A21 to rotate reversely and follow the inner ring of the one-way clutch A21 sequentially through the transmission shaft 18, the gear A19 and the gear B20; the two transmission bars A10 drive the upper supporting bar 6 to reset quickly through the two expansion plates A9; the two transmission bars B14 drive the lower supporting bar 6 to reset rapidly through the two expansion plates B13; the filter screen A8 is driven by the reset support bar 6 to restore to the original shape; the transfer strip A10 and the transfer strip B14 stop moving immediately after being reset, the thumb wheel 17 stops moving, and the outer rings of the gear A19, the gear B20 and the one-way clutch A21 stop rotating; the inner race of one-way clutch a21 continues to rotate relative to its outer race as driven by motor a28 through a series of drive connections.

To sum up, the utility model has the advantages that: the air inlet mechanism 2 and the air exhaust mechanism 3 in the utility model can increase the air inlet speed and the air exhaust speed of the power transformation box 1 under the normal condition, thereby increasing the heat dissipation speed and the heat dissipation efficiency of the power transformation box 1; the air inlet mechanism 2 and the air exhaust mechanism 3 both have the function of removing dust; when dust removal is needed, the control system controls the motor A28 in the air inlet mechanism 2 and the motor B54 in the air exhaust mechanism 3 to rotate reversely, so that the fan A30 in the air inlet mechanism 2 and the fan B55 in the air exhaust mechanism 3 synchronously rotate reversely, and the fan A30 in the air inlet mechanism 2 and the fan B55 in the air exhaust mechanism 3 respectively exhaust and intake air to the transformer box 1; in the air exhaust process of the air intake mechanism 2, the filter screen A8 in the air intake mechanism 2 is bent and deformed under the opposite arc motion of the two support bars 6, and the deformation of the filter screen A8 enables the surface of the filter screen A8 to be contracted or tensioned, so that dust attached to the screen surface of the filter screen A8 is separated from the screen surface of the filter screen A8; meanwhile, the two oppositely moving supporting strips 6 reduce the outlet of the air flow which actually flows through the filter screen A8, the air pressure of the internal air flow is increased to a certain extent, the flow speed of the air flow passing through the filter screen A8 is increased, the increased air flow passes through the filter screen A8, and the dust separated from the filter screen A8 is taken away, so that the dust on the filter screen A8 is effectively cleaned; in the process that the air exhaust mechanism 3 is converted from an air suction state to a normal air exhaust state, the elastic blocks 45 on the two transfer strips C46 in the air exhaust mechanism 3 respectively impact the frame surface of the support frame 43 provided with the plurality of layers of filter screens B44 in sequence, impact vibration causes dust attached to the filter screens B44 to fall off, and the falling dust is blown out of the air exhaust mechanism 3 along with the air exhaust of the fan B55 in the air exhaust mechanism 3, so that the dust removal of the air exhaust mechanism 3 is realized; the air inlet mechanism 2 and the air exhaust mechanism 3 accelerate the circulation speed of the heat dissipation air in the power transformation box 1 and simultaneously effectively filter the heat dissipation air entering the power transformation box 1, so that dust attached to the electric elements in the power transformation box 1 is reduced to the maximum extent, and the service life of the electric elements in the power transformation box 1 is further effectively prolonged; the air inlet mechanism 2 and the air exhaust mechanism 3 can automatically realize self dust removal without manually disassembling the dust removal mechanism for cleaning dust, so that the damage to internal electric elements caused by disassembling the power transformation box 1 is avoided, and the working efficiency of dust removal in the power transformation box 1 is effectively improved; in addition, in the dust removal process of the air inlet mechanism 2, the layers of the filter screens A8 are bent and deformed to increase the distance between two adjacent filter screens A8, so that dust can fall off from two adjacent filter screens A8 more easily, and the dust can be blown away from the filter screens A8 smoothly.

Claims

1. The utility model provides a dirt-proof transformer case which characterized in that: the air inlet mechanism and the air exhaust mechanism are respectively arranged at an air inlet and an air outlet on the transformer box;

the air inlet mechanism comprises a square tube A, a support bar, a filter screen A, a telescopic plate A, a transmission bar A, a spring A, a transmission bar B, a spring B, a shifting wheel, a transmission shaft, a motor A, a bevel gear combination B, a fan A, a shifting plate B and a shifting plate A, wherein the square tube A is arranged at an air inlet of the transformer box; a plurality of layers of filter screens A with denaturation capability are arranged between the two support bars which are vertically and symmetrically distributed in the square cylinder A, and the two support bars move in the opposite direction or in the opposite direction along an arc line; two transmission bars A which symmetrically and vertically slide on two side walls in the square cylinder A are respectively hinged with the side surfaces of the support bars distributed above the square cylinder A through fixedly connected telescopic plates A; each transfer strip A is provided with a spring A for resetting the transfer strip A; two transmission bars B which symmetrically and vertically slide on two side walls in the square tube A are respectively hinged with the side surfaces of the support bars distributed at the lower part in the square tube A through fixedly connected telescopic plates B; each transmission strip B is provided with a spring B for resetting the transmission strip B; a transmission shaft is arranged in the square barrel A and is vertical to the length direction of the square barrel A; two shifting wheels are symmetrically arranged on the transmission shaft, and each shifting wheel is positioned between the transmission strip A and the transmission strip B on the corresponding side wall in the square barrel A; a plurality of shifting plates B are uniformly distributed on the outer cylindrical surface of each shifting wheel at intervals in the circumferential direction, and the shifting plates B on each shifting wheel are matched with a plurality of shifting plates A which are vertically and uniformly distributed on the side surface of the corresponding transmission strip A at intervals and a plurality of shifting plates A which are vertically and uniformly distributed on the side surface of the corresponding transmission strip B at intervals;

the inner wall of the square barrel A is provided with a motor A, an output shaft of the motor A is in transmission connection with an input shaft of a bevel gear combination B arranged in the square barrel A, an output shaft of the bevel gear combination B is superposed with the central line of the square barrel A, and the shaft end of the output shaft of the bevel gear combination B is provided with a fan A; the fan A is positioned between the filter screen A and the bevel gear combination B; the transmission shaft is in one-way speed reduction transmission connection with an output shaft of the motor A;

2. The dustproof power transformation box of claim 1, characterized in that: two arc guide blocks are symmetrically arranged at two ends of each support bar, and the arc guide blocks at two ends of each support bar respectively slide in the arc guide grooves on the corresponding side walls in the square tube A; two guide rails A are symmetrically arranged on two side walls in the square barrel A, and each guide rail A is vertically provided with two trapezoidal guide grooves A which are parallel to each other; each transfer strip A is provided with a trapezoidal guide block A, and each transfer strip B is provided with a trapezoidal guide block B; the transfer strip A and the transfer strip B which are positioned on the same side in the square barrel A vertically slide on the guide rail A on the same side, and the trapezoidal guide block A on the transfer strip A and the trapezoidal guide block B on the transfer strip B vertically slide in the two trapezoidal guide grooves A on the guide rail A on the same side respectively.

3. The dustproof power transformation box of claim 1, characterized in that: the transmission shaft is arranged in the square cylinder A through a fixed seat A matched with the bearing of the transmission shaft; the bevel gear combination B is arranged in the square tube A through a fixed seat I matched with an input shaft bearing of the bevel gear combination B and a fixed seat H matched with an output shaft bearing of the bevel gear combination B; the bevel gear combination A is arranged in the square cylinder A through a fixed seat B matched with an output shaft bearing of the bevel gear combination A and a fixed seat C matched with an input shaft bearing of the bevel gear combination A; the output shaft of the bevel gear combination A is provided with a one-way clutch A, and the outer ring of the one-way clutch A is provided with a gear B; the gear B is meshed with a gear A arranged on the transmission shaft; the speed reducer is installed in the square cylinder A through the fixing seat D, and an output shaft of the speed reducer is in transmission connection with an input shaft of the bevel gear combination A; the input shaft of the speed reducer is matched with a bearing of a fixed seat E arranged in the square cylinder A; a gear C is arranged on an input shaft of the speed reducer and meshed with a gear D arranged on the fixed seat E, and the gear D is positioned above the gear C; an output shaft of the motor A is matched with a bearing of the fixing seat E, and a gear E meshed with the gear D is installed on the output shaft of the motor A.

4. The dustproof power transformation box of claim 1, characterized in that: two guide rails B are vertically distributed on the side wall of the square barrel B in which the transfer strips C are arranged, and the two transfer strips C respectively horizontally slide on the two guide rails B; each transfer strip C is provided with a trapezoidal guide block C, and the trapezoidal guide block C on each transfer strip slides in the trapezoidal guide groove B on the corresponding guide rail B.