Ventilation equipment for reducing salt spray corrosion of transformer

Abstract

The invention relates to the technical field of transformers, in particular to ventilation equipment for reducing salt spray corrosion of a transformer, which comprises an air inlet bin, a flow guide cone is fixedly arranged on one side of the air inlet bin, an air inlet is fixedly formed in one side of the flow guide cone, an air blower is fixedly arranged on the inner wall of one side of the air inlet, and a plurality of condensation sheets are movably connected in the air inlet bin. A drainage assembly is arranged on the inner wall of the middle of the bottom end of the air inlet bin, a plurality of blades are fixedly arranged on one side in the air inlet bin, a filter frame is connected to the other side in the air inlet bin in a clamped mode, and an assembling assembly is arranged between the air inlet bin and the filter frame. By designing a weighing controller, an exhaust fan, a reciprocating motor, a first bevel gear, a second bevel gear, a connecting lead screw, a lead screw nut, a first sliding groove, a connecting frame and other structures to be matched with one another, the reciprocating motor can be driven by the weighing controller to operate, a plurality of condensation pieces can swing in a reciprocating mode, condensed water drops generated on the surfaces of the condensation pieces can be removed in time, and the condensation effect is improved. And the efficient salt mist prevention effect of a plurality of condensation sheets is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly to a ventilation device for reducing the salt spray corrosion of transformers. Background Art

[0002] The current ventilation and cooling method of the dry-type high-voltage transformer of a wind turbine is as follows: The air outside the cabin enters the cabin from the ventilation opening at the bottom plate of the nacelle of the wind turbine below the transformer. This air passes through a layer of filter screen to remove moisture and salt spray, and then enters below the transformer after a distance of 250 mm. There are two small ventilation motors under each phase winding of the transformer, which are powered by 230VAC to blow air between the high-voltage and low-voltage windings, thereby cooling the transformer windings. During the operation of the transformer, the salt spray in the air is easily condensed on the transformer, and salt deposits are likely to appear on the insulation support blocks of the transformer, which results in a very high damage rate of the ventilation motors of the transformer.

[0003] The patent specification with the publication number CN202220471406.8 discloses a ventilation device for reducing the salt spray corrosion of a dry-type transformer, which "comprises an air dehumidification filter, the air dehumidification filter is arranged in the middle of the bottom plate of the nacelle of the wind turbine, a ventilation motor is arranged above the air dehumidification filter, the ventilation motor is connected to the front end of an air inlet pipe, the rear end of the air inlet pipe is connected to the front end of a manifold box, the rear end of the manifold box is connected to the front ends of the front ventilation pipe and the rear ventilation pipe of the transformer, the rear ventilation pipe and the front ventilation pipe of the transformer are both connected to air outlet openings, and the air outlet openings are all located below the transformer. The utility model can reduce the salt spray level in the transformer room, does not need to be heated and dehumidified when the transformer is powered on again, achieves qualified insulation level, improves the power transmission efficiency, reduces the accident rate, reduces the number of original ventilation motors, reduces the damage rate of the ventilation motors, reduces the workload and intensity of maintenance personnel, improves the maintenance efficiency, and reduces the shutdown rate of the wind turbine".

[0004] However, in the implementation of the related technology, it is found that the above ventilation device has the following problems: Most of the traditional ventilation devices for transformers use salt spray filters to filter salt spray and remove moisture. After a long time of preventing salt spray, condensed water droplets are easily formed on the surface of the condensation sheets inside the salt spray filter, which further affects the salt spray prevention effect of the ventilation device. In view of this, a ventilation device for reducing the salt spray corrosion of transformers is provided to overcome the above defects. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art and propose a ventilation device for reducing the salt spray corrosion of transformers.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a ventilation device for reducing salt spray corrosion of transformers, comprising an air inlet bin, a guide cone is fixedly provided on one side of the air inlet bin, an air inlet is fixedly provided on one side of the guide cone, a blower is fixedly provided on the inner wall of one side of the air inlet, a plurality of condensing plates are movably connected inside the air inlet bin, a drainage assembly is provided on the inner wall in the middle of the bottom end of the air inlet bin, a plurality of blades are fixedly provided on one side of the interior of the air inlet bin, a filter frame is snap-connected on the other side of the interior of the air inlet bin, and an assembly assembly is provided between the air inlet bin and the filter frame.

[0007] As a further description of the above technical solution: the drainage assembly includes a first slide groove, a slide plate, a connecting screw, a screw nut, a connecting frame and a weighing controller, the first slide groove is opened on the inner wall in the middle of the bottom end of the air inlet bin, the inner wall of the first slide groove is slidably connected with the slide plate, the interior of the first slide groove is rotatably connected with a connecting screw through a bearing, the inner wall of the slide plate is fixedly provided with a screw nut, the screw nut is threadedly connected to the connecting screw, the top of the slide plate is fixedly provided with a connecting frame, the bottom end of the connecting frame is fixedly provided with a weighing controller, the weighing end of the weighing controller is fixedly connected to a number of condensing sheets, and the slide plate can be horizontally reciprocated along the first slide groove through the reciprocating rotation of the connecting screw, so as to clean the water droplets formed on the surfaces of a number of condensing sheets.

[0008] As a further description of the above technical solution: the assembly component includes two second slide grooves, two slide plates, two return springs and two clamping rods, the two second slide grooves are respectively opened on both sides of the top of the air inlet bin, the inner walls of the two second slide grooves are slidably connected with slide plates, one side of the inner walls of the two second slide grooves is fixedly provided with a return spring, one end of the two return springs is respectively fixedly connected with the two slide plates, and one side of the two slide plates is fixedly provided with a clamping rod, the two return springs are contracted by moving the two slide plates, and the two clamping rods are separated from the sealing plate, so as to facilitate the cleaning of the blockage on the surface of the salt mist purification net.

[0009] As a further description of the above technical solution: cooling bins are fixedly provided on both sides of the bottom end of the air inlet bin, exhaust fans are fixedly provided on the inner walls of one side of the two cooling bins, a number of heat dissipation fins are fixedly provided in the middle of the two cooling bins, a drying plate is fixedly provided on one side of the two cooling bins, the interior of the two drying plates are filled with dry particles, and a water-blocking layer is fixedly provided on the inner wall of one side of the two cooling bins. The condensed water droplets at the bottom of the air inlet bin can be blown into the two cooling bins by the operation of the two exhaust fans, and the temperature balance in the equipment can be achieved after the water droplets come into contact with the several heat dissipation fins. At the same time, the dry particles filled in the two drying plates can dry the accumulated water droplets, so that the water vapor and salt mist in the equipment are further reduced, and at the same time, it can prevent the water droplets from flowing back with the air and causing the salt mist content of the inlet air to increase.

[0010] As a further description of the above technical solution: a dust filter plate is fixedly provided on one side inside the air inlet, and a salt mist filter plate is fixedly provided on one side of the dust filter plate.

[0011] As a further description of the above technical solution: a sealing plate is fixedly provided on the top of the filter, a card slot is opened on the inner wall in the middle of the top of the air inlet bin, the card slot matches the sealing plate, and card holes are opened on the inner walls on both sides of the sealing plate, and the two card holes are matched with two card rods respectively.

[0012] As a further description of the above technical solution: the inner walls on both sides of the bottom end of the connecting frame are provided with water seepage grooves, and the inner walls on the bottom ends of several of the condensing sheets are provided with diversion grooves.

[0013] As a further description of the above technical solution: a salt mist purification net made of stainless steel wire and electric heating wire is fixedly arranged inside the filter frame.

[0014] As a further description of the above technical solution: a reciprocating motor is fixedly provided in the middle part of the top of the air inlet bin, the transmission shaft of the reciprocating motor is fixedly connected with a first bevel gear, the surface of the connecting screw is fixedly provided with a second bevel gear, and the first bevel gear is meshingly connected with the second bevel gear.

[0015] As a further description of the above technical solution: a switch panel is fixedly provided on the surface of the air inlet bin, and a blower switch, an exhaust fan switch and a motor switch are respectively provided on the surface of the switch panel. The blower, two exhaust fans and the reciprocating motor are electrically connected to the power supply through the blower switch, the exhaust fan switch and the motor switch respectively.

[0016] The present invention has the following beneficial effects:

[0017] The ventilation equipment for reducing salt spray corrosion of transformers designed by the present invention cooperates with each other through the design of weighing controller, exhaust fan, reciprocating motor, first bevel gear, second bevel gear, connecting screw, screw nut, first slide groove and connecting frame and other structures. The weighing controller can be used to drive the reciprocating motor to operate so that a plurality of condensing sheets can realize reciprocating swing, and the condensed water droplets generated on the surfaces of a plurality of condensing sheets can be removed in time to maintain the high-efficiency anti-salt spray effect of a plurality of condensing sheets. Then, through the cooperation of the diversion trough, seepage trough, cooling bin, exhaust fan, cooling bin, heat dissipation fins and drying plates and other structures, the accumulated water formed by a plurality of condensing sheets can be blown into two cooling bins, and the accumulated water can realize heat transfer after contacting with a plurality of heat dissipation fins to adjust the temperature balance inside the ventilation equipment. Then, the accumulated water can be dried by the drying particles filled in the two drying plates, so that the water vapor and salt spray amount in the circulating air inside the equipment are reduced.

[0018] The ventilation device for reducing transformer salt spray corrosion designed by the present invention cooperates with each other through the design of structures such as a slide, a second slide groove, a clamping rod, a reset spring and a sealing plate. The filter frame and the salt spray purification net can be pulled out of the device by toggling two slides, so that the staff can clean the blockage on the surface of the salt spray purification net to maintain the high-efficiency salt spray corrosion prevention effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is one of the cross-sectional structural schematic diagrams of the present invention;

[0021] Figure 3 It is one of the cross-sectional structural schematic diagrams of the present invention;

[0022] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0023] Figure 5 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure at B;

[0025] Figure 7 It is a structural schematic diagram of the cooling chamber of the present invention.

[0026] Legend:

[0027] 1. Air inlet chamber; 2. Flow guiding cone; 3. Air inlet; 4. Blower; 5. Condensing fins; 6. Drainage component; 7. Blades; 8. Filter frame; 9. Assembly component; 10. Cooling chamber; 11. Exhaust fan; 12. Heat dissipation fins; 13. Drying plate; 14. Water blocking layer; 15. Dust filter plate; 16. Salt spray filter plate; 17. Sealing plate; 18. Card slot; 19. Card hole; 20. Water seepage tank; 21. Flow splitting tank; 22. Salt spray purification net; 23. Reciprocating motor; 24. First helical gear; 25. Second helical gear; 26. Switch panel; 61. First chute; 62. Slide plate; 63. Connecting lead screw; 64. Lead screw nut; 65. Connecting frame; 66. Weighing controller; 91. Second chute; 92. Slide piece; 93. Return spring; 94. Card rod. Detailed implementation mode

[0028] Referring to Figure 1-7 , a ventilation device for reducing salt spray corrosion of transformers provided by the present invention: includes an air inlet chamber 1, a flow guiding cone 2 is fixedly arranged on one side of the air inlet chamber 1, an air inlet 3 is fixedly arranged on one side of the flow guiding cone 2, a blower 4 is fixedly arranged on the inner wall of one side of the air inlet 3, a plurality of condensing fins 5 are movably connected inside the air inlet chamber 1, a drainage component 6 is arranged on the inner wall of the middle part of the bottom end of the air inlet chamber 1, a plurality of blades 7 are fixedly arranged on one side inside the air inlet chamber 1, a filter frame 8 is snap-connected on the other side inside the air inlet chamber 1, and an assembly component 9 is arranged between the air inlet chamber 1 and the filter frame 8.

[0029] As a further implementation of the above technical solution: the drainage component 6 includes a first chute 61, a slide plate 62, a connecting lead screw 63, a lead screw nut 64, a connecting frame 65 and a weighing controller 66. The first chute 61 is opened on the inner wall of the middle part of the bottom end of the air inlet chamber 1. The inner wall of the first chute 61 is slidably connected with the slide plate 62. The connecting lead screw 63 is rotatably connected inside the first chute 61 through a bearing. The lead screw nut 64 is fixedly arranged on the inner wall of the slide plate 62. The lead screw nut 64 is threadedly connected with the connecting lead screw 63. The top end of the slide plate 62 is fixedly provided with the connecting frame 65. The weighing controller 66 is fixedly arranged at the bottom end inside the connecting frame 65. The weighing end of the weighing controller 66 is fixedly connected with a plurality of condensing fins 5;

[0030] Cooling chambers 10 are fixedly arranged on both sides of the bottom end of the air inlet chamber 1. Exhaust fans 11 are fixedly arranged on the inner walls of one side of the two cooling chambers 10. A plurality of heat dissipation fins 12 are fixedly arranged in the middle of the two cooling chambers 10. Drying plates 13 are fixedly arranged on one side inside the two cooling chambers 10. Drying particles are filled inside the two drying plates 13. Water blocking layers 14 are fixedly arranged on the inner walls of one side of the two cooling chambers 10;

[0031] Water seepage tanks 20 are opened on the inner walls of both sides of the bottom end of the connecting frame 65. Flow splitting tanks 21 are opened on the inner walls of the bottom ends of a plurality of condensing fins 5;

[0032] A reciprocating motor 23 is fixedly provided in the middle of the top of the air inlet bin 1, and a first bevel gear 24 is fixedly connected to the transmission shaft of the reciprocating motor 23. A second bevel gear 25 is fixedly provided on the surface of the connecting screw 63. The first bevel gear 24 is meshedly connected with the second bevel gear 25. When excessive water vapor adheres to the surfaces of several condensing sheets 5, the weighing controller 66 controls the operation of the two exhaust fans 11 and the reciprocating motor 23 through the exhaust fan switch and the motor switch. After the reciprocating motor 23 is started, it drives the first bevel gear 24 to rotate. Since the first bevel gear 24 is meshedly connected with the second bevel gear 25, the connecting screw 63 can be driven to rotate. After it cooperates with the screw nut 64, the slide plate 62 can move along the first slide groove The inner wall of 61 slides back and forth, thereby making the connecting frame 65 and the plurality of condensing sheets 5 swing back and forth, so that the condensed water droplets generated on the surface of the plurality of condensing sheets 5 can be removed in time to maintain the high efficiency of the plurality of condensing sheets 5. After the water droplets are removed, they enter the interior of the two cooling bins 10 respectively through the plurality of diversion grooves 21 and the two water seepage grooves 20. At this time, the two exhaust fans 11 are operated to generate negative pressure inside the two cooling bins 10, so that the accumulated water formed by the plurality of condensing sheets 5 can be quickly attracted. At the same time, the accumulated water contacts with the plurality of heat dissipating fins 12 to realize heat transfer, so as to adjust the temperature balance inside the ventilation equipment. The drying particles filled in the two drying plates 13 can dry the accumulated water.

[0033] As a further implementation scheme of the above technical scheme: the assembly component 9 includes two second slide grooves 91, two slide plates 92, two return springs 93 and two clamping rods 94, the two second slide grooves 91 are respectively opened on both sides of the top of the air inlet bin 1, the inner walls of the two second slide grooves 91 are slidably connected with the slide plates 92, one side of the inner walls of the two second slide grooves 91 are fixedly provided with return springs 93, one end of the two return springs 93 is respectively fixedly connected with the two slide plates 92, and one side of the two slide plates 92 are fixedly provided with clamping rods 94;

[0034] A sealing plate 17 is fixedly provided on the top of the filter frame 8, and a card slot 18 is provided on the inner wall in the middle of the top of the air inlet bin 1, and the card slot 18 matches the sealing plate 17. Card holes 19 are provided on the inner walls on both sides of the sealing plate 17, and the two card holes 19 match the two card rods 94 respectively. By shifting the two slides 92, they slide on the inner walls of the two second slide grooves 91 respectively. When the two card rods 94 are separated from the sealing plate 17, the sealing plate 17, the filter frame 8 and the salt mist purification net 22 can be pulled out of the equipment, so that the staff can clean the blockage on the surface of the salt mist purification net 22 to maintain the high-efficiency anti-salt mist corrosion effect of the equipment.

[0035] As a further implementation scheme of the above technical scheme: a dust filter plate 15 is fixedly provided on one side of the air inlet 3, and a salt mist filter plate 16 is fixedly provided on one side of the dust filter plate 15;

[0036] A salt mist purification net 22 made of stainless steel wire and electric heating wire is fixed inside the filter frame 8. The air entering the transformer room can be filtered in multiple stages through the dust filter plate 15, the salt mist filter plate 16 and the salt mist purification net 22, thereby preventing the transformer from being corroded by salt mist.

[0037] As a further implementation scheme of the above technical scheme: a switch panel 26 is fixedly provided on the surface of the air inlet bin 1, and a blower switch, an exhaust fan switch and a motor switch are respectively provided on the surface of the switch panel 26. The blower 4, two exhaust fans 11 and the reciprocating motor 23 are electrically connected to the power supply through the blower switch, the exhaust fan switch and the motor switch respectively.

[0038] Working principle: When using the present invention, first set the weighing detection range of the weighing controller 66. The ventilation equipment is installed in the ventilation place of the transformer storage room. When the transformer room is ventilated, the external air enters the ventilation equipment through the gaps between the blades 7 through the blower 4. When the airflow flows through the condensing sheets 5, the condensing sheets 5 can remove the humid gas in the air and reduce the salt mist. When there is excessive water vapor adhering to the surface of the condensing sheets 5, the weighing result exceeds its detection range. The weighing controller 66 controls the two exhaust fans 11 and 12 through the exhaust fan switch and the motor switch. The reciprocating motor 23 is in operation. After the reciprocating motor 23 is started, it drives the first bevel gear 24 to rotate. Since the first bevel gear 24 is meshed and connected with the second bevel gear 25, it can drive the connecting screw 63 to rotate. After it cooperates with the screw nut 64, the slide plate 62 can slide back and forth along the inner wall of the first slide groove 61, thereby making the connecting frame 65 and a plurality of condensing sheets 5 swing back and forth, and the condensed water droplets generated on the surface of a plurality of condensing sheets 5 can be removed in time to maintain the high efficiency of a plurality of condensing sheets 5. After the water droplets are removed, they enter the interior of the two cooling chambers 10 respectively through a plurality of diversion grooves 21 and two seepage grooves 20. At this time, through the two The operation of the exhaust fan 11 generates negative pressure inside the two cooling chambers 10, which can quickly absorb the accumulated water formed by the several condensing sheets 5. At the same time, the accumulated water contacts with the several heat dissipating fins 12 to achieve heat transfer, so as to adjust the temperature balance inside the ventilation equipment. The dry particles filled in the two drying plates 13 can dry the accumulated water. The gas that has been initially filtered passes through the several condensing sheets 5, and then passes through the salt mist purification net 22, the dust filter plate 15 and the salt mist filter plate 16 to achieve multi-stage filtration. Finally, it is discharged into the transformer room through the air outlet of the blower 4, and is interlaced with stainless steel wire and electric heating wire. The salt mist purification net 22 is made, and the electric heating wire on its surface is heated to further effectively isolate the salt mist water vapor in the airflow, thereby further improving the anti-salt mist corrosion effect of the equipment. When the surface of the salt mist purification net 22 is seriously blocked and affects the filtering efficiency, the two slides 92 are moved to slide on the inner walls of the two second slide grooves 91 respectively. When the two clamping rods 94 are separated from the sealing plate 17, the sealing plate 17, the filter frame 8 and the salt mist purification net 22 can be withdrawn from the equipment, so that the staff can clean the blockage on the surface of the salt mist purification net 22 to maintain the high-efficiency anti-salt mist corrosion effect of the equipment.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation device for reducing the salt spray corrosion of a transformer, comprising an air inlet chamber (1), characterized in that: One side of the air inlet bin (1) is fixedly provided with a diversion cone (2), one side of the diversion cone (2) is fixedly provided with an air inlet (3), a blower (4) is fixedly provided on the inner wall of one side of the air inlet (3), several condensing fins (5) are movably connected inside the air inlet bin (1), a drainage component (6) is provided on the inner wall of the middle part of the bottom end of the air inlet bin (1), several blades (7) are fixedly provided on one side inside the air inlet bin (1), a filter frame (8) is snap-connected on the other side inside the air inlet bin (1), and an assembly component (9) is arranged between the air inlet bin (1) and the filter frame (8).

2. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, characterized in that: The drainage component (6) includes a first chute (61), a sliding plate (62), a connecting lead screw (63), a lead screw nut (64), a connecting frame (65) and a weighing controller (66). The first chute (61) is opened on the inner wall of the middle part of the bottom end of the air inlet bin (1), the inner wall of the first chute (61) is slidably connected with the sliding plate (62), the connecting lead screw (63) is rotatably connected inside the first chute (61) through a bearing, the lead screw nut (64) is fixedly provided on the inner wall of the sliding plate (62), the lead screw nut (64) is threadedly connected with the connecting lead screw (63), the top end of the sliding plate (62) is fixedly provided with the connecting frame (65), the weighing controller (66) is fixedly provided at the bottom end inside the connecting frame (65), and the weighing end of the weighing controller (66) is fixedly connected with several condensing fins (5).

3. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, characterized in that: The assembly component (9) includes two second chutes (91), two sliding pieces (92), two return springs (93) and two clamping rods (94). The two second chutes (91) are respectively opened on both sides of the top end of the air inlet bin (1), the inner walls of the two second chutes (91) are slidably connected with the sliding pieces (92), one side of the inner walls of the two second chutes (91) is fixedly provided with the return springs (93), one ends of the two return springs (93) are respectively fixedly connected with the two sliding pieces (92), and one side of each of the two sliding pieces (92) is fixedly provided with a clamping rod (94).

4. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, characterized in that: Both sides of the bottom end of the air inlet bin (1) are fixedly provided with cooling bins (10), exhaust fans (11) are fixedly provided on the inner walls of one side of the two cooling bins (10), several heat dissipation fins (12) are fixedly provided in the middle parts of the two cooling bins (10), drying plates (13) are fixedly provided on one side inside the two cooling bins (10), drying particles are filled inside the two drying plates (13), and water blocking layers (14) are fixedly provided on the inner walls of one side of the two cooling bins (10).

5. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, wherein: A dust filter plate (15) is fixedly provided on one side inside the air inlet (3), and a salt mist filter plate (16) is fixedly provided on one side of the dust filter plate (15).

6. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 3, wherein: A sealing plate (17) is fixedly provided on the top of the filter frame (8); a clamping groove (18) is provided on the inner wall in the middle of the top end of the air inlet bin (1); the clamping groove (18) matches the sealing plate (17); clamping holes (19) are provided on the inner walls on both sides of the sealing plate (17); the two clamping holes (19) respectively match the two clamping rods (94).

7. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 2, characterized in that: The inner walls on both sides of the bottom end of the connection frame (65) are provided with water seepage grooves (20), and the inner walls on the bottom ends of a plurality of the condensing plates (5) are provided with diversion grooves (21).

8. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, characterized in that: A salt mist purification net (22) made of stainless steel wires and electric heating wires interlaced is fixedly arranged inside the filter frame (8).

9. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 2, characterized in that: A reciprocating motor (23) is fixedly provided in the middle of the top of the air inlet bin (1), a transmission shaft of the reciprocating motor (23) is fixedly connected to a first bevel gear (24), a second bevel gear (25) is fixedly provided on the surface of the connecting screw rod (63), and the first bevel gear (24) is meshingly connected to the second bevel gear (25).

10. The ventilation device for reducing the salt spray corrosion of a transformer according to claim 1, characterized in that: A switch panel (26) is fixedly provided on the surface of the air inlet bin (1), and a blower switch, an exhaust fan switch and a motor switch are respectively provided on the surface of the switch panel (26); the blower (4), the two exhaust fans (11) and the reciprocating motor (23) are respectively electrically connected to a power source via the blower switch, the exhaust fan switch and the motor switch.

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