CN118341021A - Purging device for changing common motor into explosion-proof motor - Google Patents

Abstract

The invention relates to the technical field of motor equipment and discloses a purging device for changing an ordinary motor into an explosion-proof motor, which comprises two mounting plates, wherein a motor shell is arranged between the mounting plates, a rotor is arranged in the motor shell, an exhaust electromagnetic valve is arranged on the right side of the mounting plate positioned on the right side, an exhaust throttle valve is communicated with the right end of the exhaust electromagnetic valve, an air inlet throttle valve and a compensation throttle valve are sequentially arranged on the left side of the mounting plate positioned on the left side from top to bottom, and the mounting plates connected with the exhaust electromagnetic valve, the air inlet throttle valve, the air inlet electromagnetic valve, the compensation throttle valve, the compensation electromagnetic valve and a decompression filter are arranged at the two ends of the motor shell through replacement of the mounting plates at the two ordinary motors, so that purging operation is carried out on the interior of the motor through air supply equipment, the air in the motor is in a safety range, and the air positive pressure is kept, and the explosive gas generated by an electric appliance is prevented from being detonated.

Description

Purging device for changing common motor into explosion-proof motor

Technical Field

The invention relates to the technical field of motor equipment, in particular to a purging device for changing a common motor into an explosion-proof motor.

Background

Motors and appliances used in situations where there is a risk of gas explosion typically employ positive pressure air to purge the interior of the motor and appliance, keep the gas inside the motor and appliance within a safe range, and maintain a positive pressure of air to prevent sparks generated by the appliance from detonating the explosive gases. The existing defects still exist in the actual use process, when the common motor is changed into the explosion-proof motor, the original structure is required to be perforated, welded and other operations, electromagnetic valves and other devices are added, a great amount of time is required to carry out refitting operation, and the purging device for changing the parts into the explosion-proof motor is lack of rapid replacement to solve the problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a purging device for changing a common motor into an explosion-proof motor, which solves the problems in the prior art.

In order to solve the technical problem, according to one aspect of the invention, a purging device for changing a common motor into an explosion-proof motor comprises two mounting plates, a motor casing is arranged between the mounting plates, a rotor is arranged in the motor casing, an exhaust electromagnetic valve is arranged on the right side of the mounting plate and positioned on the right side, an exhaust throttle valve is communicated with the right end of the exhaust electromagnetic valve, an air inlet throttle valve and a compensation throttle valve are sequentially arranged on the left side of the mounting plate and positioned on the left side from top to bottom, an air inlet electromagnetic valve is communicated with the left end of the air inlet throttle valve, a compensation electromagnetic valve is communicated with the left end of the compensation throttle valve, and a decompression filter is jointly communicated with the left end of the air inlet electromagnetic valve and the left end of the compensation electromagnetic valve through a pipeline.

Still further, motor casing surface integrated into one piece has four brackets, two draw-in grooves have all been seted up to the side around the bracket, two the mounting panel opposite side is located the inside boss that all is fixed with of motor casing, the boss is close to the change groove has been seted up to one side of mounting panel, boss surface through-connection has four spouts, the inside piping channel that has seted up that runs through of boss, the inside fixedly connected with siphunculus of piping channel, the siphunculus is kept away from the one end of motor casing runs through to the mounting panel surface, change inslot portion rotation is connected with the carousel, four guide slots have been run through to the carousel inside, guide slot inside sliding connection has the guide arm, four slide inside sliding connection has the slide, four slide joint has the sealing washer mutually in the back of the end.

Still further, the inner chamber has been seted up to the inside inner chamber of mounting panel, the carousel is kept away from one side integrated into one piece of boss has the swivel, the swivel is kept away from the one end of carousel runs through extremely inside the inner chamber, the inside below that is located the swivel of inner chamber all rotates and is connected with gear one, inside rotation in inner chamber is connected with gear one, gear one is close to one side integrated into one of motor casing has gear two, gear two outside is equipped with gear three, the inner chamber inside is located gear three with rotate between the gear two and be connected with gear two, the mounting panel is close to one side of motor casing is fixed with four arc frames, four the arc frames are located respectively between two adjacent shells, the arc frame is close to one side of mounting panel has seted up the inside groove, inside sliding connection in the inside two arc cards, inside being located the inside rotation of arc card is connected with the axostylus axostyle, the axostyle is kept away from one end of arc frame runs through to inside the inner chamber, the surface is located inside the three gear of axostylus axostyle, the inner surface is fixed with gear three and four arc frames are located respectively, two inner surfaces are located four arc frames are fixed with four and four tooth rings respectively.

Still further, two rectangular channels have all been seted up to mounting panel opposite side top, rectangular channel inside sliding connection has a rectangular cylinder, the inside sliding connection of rectangular cylinder has a rectangular block, is located the top gear one middle part is fixed with the bull stick, the bull stick is kept away from gear one's one end runs through to inside the rectangular cylinder, and with rectangular block fixed connection, rectangular cylinder internal surface with be fixed with the extension spring jointly between the rectangular block.

Further, a torsion spring is fixed on the outer surface of the rotating rod and the surface of the rectangular groove together.

Furthermore, four jacks are formed in the four sliding plates and the sealing ring in a penetrating mode.

Furthermore, a plurality of heat dissipation grooves are formed in the outer surface of the shell frame.

Further, the outer surface of the swivel, the inner and outer surfaces of the toothed ring I, the inner and outer surfaces of the toothed ring II and the inner and outer surfaces of the toothed ring III are provided with a plurality of tooth grooves;

The rotary ring is meshed with the first toothed ring through the tooth grooves, the first outer surface of the toothed ring is meshed with the corresponding fourth toothed ring through the tooth grooves, the inner sides of the arc clamps are meshed with the third toothed ring through the tooth grooves, and the second toothed ring is meshed with the third toothed ring through the tooth grooves.

Furthermore, the sealing ring is attached to the inner surface of the motor casing.

The purging device for changing the common motor into the explosion-proof motor has the beneficial effects that:

when the invention is used, the mounting plates connected with the exhaust electromagnetic valve, the exhaust throttle valve, the air inlet electromagnetic valve, the compensation throttle valve, the compensation electromagnetic valve and the decompression filter are arranged at the two ends of the motor shell by replacing the mounting plates at the two common motors, so that the air in the motors is blown by external air source equipment, the air in the motors is in a safe range and the positive pressure of the air is kept, and the explosive gas is prevented from being detonated by sparks generated by electric appliances;

When the mounting plate is mounted, a person needs to press the rectangular cylinder to enable the rectangular block to slide in the rectangular cylinder, when the mounting plate is attached to two sides of the motor casing, the arc-shaped end of the arc clamp contacts the casing frame and contracts inwards due to extrusion, the gear III drives the shaft rod to rotate, the gear IV simultaneously rotates the toothed ring I and the toothed ring III synchronously, the rotating ring and the rotating disc rotate under the transmission of the gear I, the guide rod is guided to move by the inner wall of the guide groove, so that the sealing ring is pulled to bend by the sliding plate, the sealing ring does not contact with the inner wall of the motor casing when the arc clamp enters the motor casing, and when the arc clamp moves to the clamping groove, the compressed torsion spring drives the structures such as the rotating rod to rotate reversely, so that the arc clamp is reset and clamped into the clamping groove, the mounting plate is connected with the motor casing quickly, and the structures such as the sliding plate are reset, so that the sealing ring is reduced or supported outwards and attached to the inner wall of the motor casing, so that the sealing performance is improved.

Drawings

The invention will be described in further detail with reference to the accompanying drawings and detailed description.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a motor housing according to the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a schematic view of the mounting plate and pressure reducing filter of the present invention;

FIG. 5 is a schematic view of the structure of the mounting plate of the present invention;

FIG. 6 is a schematic cross-sectional view of a mounting plate of the present invention;

FIG. 7 is a schematic view of the internal structure of the mounting plate of the present invention;

FIG. 8 is a schematic view of the internal structure of the mounting plate from another perspective in accordance with the present invention;

FIG. 9 is an enlarged schematic view of the structure of FIG. 8A according to the present invention;

FIG. 10 is a schematic view of a cam structure according to the present invention;

Fig. 11 is an enlarged schematic view of the structure of fig. 3B according to the present invention.

In the figure: 1. a mounting plate; 2. a motor housing; 3. a rotor; 4. an exhaust electromagnetic valve; 5. an exhaust throttle valve; 6. an intake throttle valve; 7. an air inlet electromagnetic valve; 8. a compensating throttle valve; 9. a compensation electromagnetic valve; 10. a pressure reducing filter; 11. a housing; 12. a clamping groove; 13. a cam; 14. a rotary groove; 15. a chute; 16. a tube groove; 17. a through pipe; 18. a turntable; 19. a guide groove; 20. a guide rod; 21. a slide plate; 22. a seal ring; 23. an inner cavity; 24. a swivel; 25. a first gear; 26. a first toothed ring; 27. a second toothed ring; 28. a second gear; 29. a toothed ring III; 30. an arc frame; 31. an inner tank; 32. arc card; 33. a shaft lever; 34. a third gear; 35. a fourth gear; 36. a torsion spring; 37. rectangular grooves; 38. a rotating rod; 39. rectangular blocks; 40. a rectangular cylinder; 41. a tension spring; 42. a jack; 43. a heat sink.

Detailed Description

The application will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

As shown in fig. 1 to 11, according to one aspect of the present invention, there is provided a purging device for changing a general motor into an explosion-proof motor, comprising two mounting plates 1, a motor casing 2 is provided between the mounting plates 1, a rotor 3 is provided in the motor casing 2, an exhaust electromagnetic valve 4 is provided on the right side of the mounting plate 1 on the right side, the right end of the exhaust electromagnetic valve 4 is communicated with an exhaust throttle valve 5, an intake throttle valve 6 and a compensation throttle valve 8 are provided on the left side of the mounting plate 1 on the left side in sequence from top to bottom, the left end of the intake throttle valve 6 is communicated with an intake electromagnetic valve 7, the left end of the compensation throttle valve 8 is communicated with a compensation electromagnetic valve 9, the left end of the intake electromagnetic valve 7 and the left end of the compensation electromagnetic valve 9 are jointly communicated with a decompression filter 10 through a pipeline, the two mounting plates 1 are detachably connected with the motor casing 2, and the general motor is formed with the rotor 3, after the installation plate 1 carrying the exhaust electromagnetic valve 4, the exhaust throttle valve 5, the air inlet throttle valve 6, the air inlet electromagnetic valve 7, the compensation throttle valve 8, the compensation electromagnetic valve 9 and the decompression filter 10 is installed, the common motor is changed into an explosion-proof motor, the devices such as the exhaust electromagnetic valve 4, the exhaust throttle valve 5, the air inlet throttle valve 6, the air inlet electromagnetic valve 7, the compensation throttle valve 8, the compensation electromagnetic valve 9 and the decompression filter 10 are controlled by external intelligent devices, the decompression filter 10 is connected with external air source devices, the air source devices purge the air into the motor through the air inlet throttle valve 6, the air inlet electromagnetic valve 7, the compensation throttle valve 8, the compensation electromagnetic valve 9 and the decompression filter 10 and discharge air through the exhaust electromagnetic valve 4 and the exhaust throttle valve 5, so that the internal purging of positive pressure air is realized, the air in the motor is within a safe range and the positive pressure of the air is kept, to prevent sparks generated by the electrical appliance from detonating the explosive gases.

In this embodiment, motor casing 2 surface integrated into one piece has four shell framves 11, two draw-in grooves 12 have all been seted up to the front and back side of shell frame 11, two mounting panel 1 opposite sides are located motor casing 2 inside all to be fixed with boss 13, boss 13 has been seted up to one side that is close to mounting panel 1 and has been rotated groove 14, boss 13 surface through-connection has four spouts 15, boss 13 inside has been run through and has been seted up tube groove 16, tube groove 16 inside fixedly connected with siphunculus 17, the one end that the motor casing 2 was kept away from to tube 17 runs through to mounting panel 1 surface, the inside rotation of groove 14 is connected with carousel 18, four guide slots 19 have been run through in carousel 18 inside, guide slot 19 inside sliding connection has guide arm 20, the inside sliding connection of spout 15 has slide 21, the joint has sealing washer 22 jointly to four slide 21 opposite ends.

In this embodiment, the inner chamber 23 has been seted up inside the mounting panel 1, one side integrated into one piece that the carousel 18 kept away from boss 13 has swivel 24, one end that swivel 24 kept away from the carousel 18 runs through to the inner chamber 23 inside, the inner chamber 23 inside is located the equal swivelling joint of swivel 24 top and bottom has gear one 25, the inside swivelling joint of inner chamber 23 has gear one 26, one side integrated into one piece that gear one 26 is close to motor casing 2 has gear two 27, the gear two 27 outside is equipped with gear three 29, the inner chamber 23 inside is located gear three 29 and is connected with gear two 28 in the rotation between gear two 27, one side that mounting panel 1 is close to motor casing 2 is fixed with four arc shelves 30, four arc shelves 30 are located respectively between two adjacent shells 11, one side that arc shelf 30 is close to mounting panel 1 has seted up inside groove 31, inside sliding connection has two arc cards 32, inside groove 31 inside is located inside arc card 32 inboard swivelling joint has axostylus axostyle 33, one end that arc shelf 33 is kept away from arc shelf 30 runs through to the inner chamber 23, the surface is located arc card 32 inboard is fixed with gear three 34, two inner surface 33, two inner chamber 33 surface are located arc card 32 inside, the inner surface is located gear 35, the inner side is fixed with four arc cards 35, when inner chamber 33 is located 23 inside four arc shelves 35, it is fixed with four arc shelves 35, when the side contact one side is needed to be the side, one side is set up for the arc shelf 25, when the side is more is adjacent to be a rectangle, the side is needed, the side is pressed down, and one side is more is set up for the side, and is more is opposite to be a side, and is more convenient to be connected to be a side, and is set up, and is pressed to be a side, and is set up and is more is a side to be connected to a side and a side 25, and a side 25 is required to be connected to a side.

In this embodiment, rectangular grooves 37 are formed above opposite sides of two mounting plates 1, rectangular cylinders 40 are slidably connected inside the rectangular grooves 37, rectangular blocks 39 are slidably connected inside the rectangular cylinders 40, a rotating rod 38 is fixed in the middle of a gear one 25 located above, one end, away from the gear one 25, of the rotating rod 38 penetrates into the rectangular cylinders 40 and is fixedly connected with the rectangular blocks 39, a tension spring 41 is fixedly arranged between the inner surface of the rectangular cylinders 40 and the rectangular blocks 39, the rectangular cylinders 40 are kept on the outer surfaces of the rectangular blocks 39 and limit the rectangular blocks under the pulling of the tension spring 41, the rectangular blocks 39 cannot rotate with the structures such as the rotating rod 38 and the gear one 25, the rectangular cylinders 40 are pressed by a tool to slide in the rectangular cylinders 40, and therefore the rectangular blocks 39 are released from limit, and the internal structure is enabled to operate in linkage.

In this embodiment, the outer surface of the rotating rod 38 and the surface of the rectangular groove 37 are fixed with a torsion spring 36, the torsion spring 36 can be compressed when the outer arc end of the arc clamp 32 is extruded and retracted to generate linkage transmission and the rotating rod 38 rotates, and when the arc clamp 32 moves to the clamping groove 12, the torsion spring 36 drives the rotating rod 38 to rotate, so that the two arc clamps 32 can be reset to move and clamp into the clamping groove 12 under the transmission of the structures of the first gear 25, the first gear ring 26, the second gear ring 27 and the like.

In this embodiment, four jacks 42 are jointly penetrated through the four sliding plates 21 and the sealing ring 22, and by inserting bolts into the jacks 42, the sealing ring 22 is fixedly connected with the sliding plate 21, so that the sealing ring 22 is prevented from being separated from the sliding plate 21 when the sliding plate 21 adduction pulls the sealing ring 22 to bend to reduce the volume, and the sealing ring 22 is prevented from being contacted with the inner surface of the motor casing 2 when the sliding plate 21 adduction pulls the sealing ring 22 to bend to reduce the volume, and the friction between the sealing ring 22 and the motor casing 2 is prevented from influencing the installation efficiency.

In the present embodiment, a plurality of heat dissipation grooves 43 are formed on the outer surface of the housing 11 to improve the heat dissipation effect during the operation of the motor.

In the embodiment, a plurality of tooth grooves are formed in the inner side wall of the arc clamp 32, namely the outer surface of the rotary ring 24, the inner and outer surfaces of the toothed ring I26, the inner and outer surfaces of the toothed ring II 27 and the inner and outer surfaces of the toothed ring III 29;

The rotating ring 24 and the toothed ring one 26 are all connected with the gear one 25 in a meshed manner through tooth grooves, the outer surface of the toothed ring one 26 and the outer surface of the toothed ring three 29 are all connected with the corresponding gear four 35 in a meshed manner through tooth grooves, the common tooth grooves on the inner sides of the arc clamps 32 are connected with the gear three 34 in a meshed manner, the tooth grooves between the toothed ring two 27 and the toothed ring three 29 are all connected with the gear two 28 in a meshed manner, when the mounting plate 1 and the motor casing 2 are required to be detached and separated, a person presses the rectangular cylinder 40 inwards through a tool, rotates the rectangular block 39 and the rotating rod 38 to enable the gear one 25 to rotate, so that the toothed ring one 26 and the toothed ring two 27 rotate, the toothed ring three 29 rotates through the gear two 28, and finally the toothed ring three 29 and the toothed ring one 26 which rotate simultaneously enable the arc clamps 32 to inwards slide to be separated from the clamping groove 12 through the gear four 35 and the gear three 34 which correspond to the outer sides, so that the connection between the mounting plate 1 and the motor casing 2 is removed, and the mounting plate 1 can be detached and replaced by the person.

In this embodiment, the sealing ring 22 is attached to the inner surface of the motor casing 2, so that the sealing ring 22 can improve the tightness of the interior of the motor.

The working principle of the device is as follows: when the electric motor is used, the mounting plates 1 connected with the exhaust electromagnetic valve 4, the exhaust throttle valve 5, the air inlet throttle valve 6, the air inlet electromagnetic valve 7, the compensation throttle valve 8, the compensation electromagnetic valve 9 and the decompression filter 10 are arranged at two ends of the motor shell 2 through the two mounting plates 1 at the position of the common motor, so that air is supplied through external air source equipment, the inside of the motor is purged, the air in the motor is in a safe range, the positive pressure of the air is kept, and the explosive gas is prevented from being detonated by sparks generated by an electric appliance;

When the mounting plate 1 is mounted, a person needs to press the rectangular cylinder 40 to enable the rectangular cylinder 40 to slide in the rectangular cylinder, so that the rectangular block 39 is released from limit, when the mounting plate 1 is attached to two sides of the motor casing 2, when the arc ends of the arc clamps 32 are contacted with the casing frame 11, the arc ends are retracted by extrusion, the shaft rod 33 is driven to rotate through the gear III 34, meanwhile, the gear IV 35 rotates the gear IV 26 and the gear III 29 synchronously, the rotating ring 24 rotates with the rotary table 18 under the transmission of the gear IV 25, the guide rod 20 is guided to move by the inner wall of the guide groove 19, the sealing ring 22 is pulled to bend by the sliding plate 21, the sealing ring 22 is prevented from contacting with the inner wall of the motor casing 2 when the arc clamps 32 move to the clamping groove 12, the compressed torsion spring 36 drives the structures such as the rotary rod 38 to rotate reversely, so that the arc clamps 32 are reset and clamped into the clamping groove 12, the mounting plate 1 is quickly connected with the motor casing 2, the sliding plate 21 and other structures are reset accordingly, the sealing ring 22 is reduced or expanded outwards, and the sealing ring 22 is attached to the inner wall of the motor casing 2, and the sealing performance is improved.

Of course, the above description is not intended to limit the invention, but rather the invention is not limited to the above examples, and variations, modifications, additions or substitutions within the spirit and scope of the invention will be within the scope of the invention.

Claims (9)

1. The utility model provides a common motor changes explosion-proof machine's sweep device, includes two mounting panel (1), its characterized in that: be provided with motor casing (2) between mounting panel (1), motor casing (2) inside is provided with rotor (3), is located the right side mounting panel (1) right side is provided with exhaust solenoid valve (4), exhaust solenoid valve (4) right-hand member intercommunication has exhaust throttle valve (5), is located left mounting panel (1) left side from the top down has set gradually air inlet throttle valve (6), compensation throttle valve (8), air inlet throttle valve (6) left end intercommunication has air inlet solenoid valve (7), compensation throttle valve (8) left end intercommunication has compensation solenoid valve (9), air inlet solenoid valve (7) left end with compensation solenoid valve (9) left end is through pipeline intercommunication together has decompression filter (10).

2. The purge device for changing a common motor into an explosion-proof motor according to claim 1, wherein: the motor casing (2) surface integrated into one piece has four shell framves (11), two draw-in grooves (12) have all been seted up to the front and back side of shell frame (11), two mounting panel (1) opposite side is located motor casing (2) inside all is fixed with flange (13), flange (13) are close to one side of mounting panel (1) has been seted up rotary chute (14), flange (13) surface through-connection has four spout (15), inside tubular groove (16) of having run through of flange (13), tubular groove (16) inside fixedly connected with siphunculus (17), the siphunculus (17) are kept away from one end of motor casing (2) runs through to mounting panel (1) surface, rotary chute (14) inside rotation is connected with carousel (18), four guide slot (19) have been run through to carousel (18) inside, guide arm (20) are connected with in the inside sliding connection of guide slot (15), four slide (21) joint seal ring (22) have jointly to opposite side.

3. The purge device for changing a common motor into an explosion-proof motor according to claim 2, wherein: an inner cavity (23) is formed in the mounting plate (1), one side of the rotary table (18) away from the convex disc (13) is integrally formed with a rotary ring (24), one end of the rotary ring (24) away from the rotary table (18) penetrates through the inner cavity (23), the inner side of the inner cavity (23) is located at the upper part and the lower part of the rotary ring (24) and is rotationally connected with a first gear (25), the inner side of the inner cavity (23) is rotationally connected with a first toothed ring (26), one side of the first toothed ring (26) close to the motor casing (2) is integrally formed with a second toothed ring (27), the outer side of the second toothed ring (27) is provided with a third toothed ring (29), the inner side of the inner cavity (23) is located at the third toothed ring (29) and is rotationally connected with a second gear (28), one side of the mounting plate (1) close to the motor casing (2) is fixedly provided with four arc frames (30), the four arc frames (30) are respectively located between two adjacent casing frames (11), one side of the inner side (31) close to the inner groove (31) is provided with an arc frame (31), one side (31) of the inner groove (31) is connected with an arc (32), one end that axostylus axostyle (33) is kept away from arc frame (30) runs through to inside inner chamber (23), axostylus axostyle (33) surface is located arc card (32) inboard is fixed with gear three (34), two axostylus axostyle (33) surface is located inside all is fixed with gear four (35) of inner chamber (23), two gear four (35) are crisscross to be set up, and are located respectively tooth ring one (26), tooth ring three (29) top.

4. A common motor to explosion proof motor purge apparatus according to claim 3, wherein: rectangular grooves (37) are formed in the upper portions of the opposite sides of the mounting plates (1), rectangular cylinders (40) are connected inside the rectangular grooves (37) in a sliding mode, rectangular blocks (39) are connected inside the rectangular cylinders (40) in a sliding mode, rotating rods (38) are fixed in the middle of the first gear (25) and located above the first gear, one ends, away from the first gear (25), of the rotating rods (38) penetrate through the rectangular cylinders (40) and are fixedly connected with the rectangular blocks (39), and tension springs (41) are fixedly arranged between the inner surfaces of the rectangular cylinders (40) and the rectangular blocks (39) in a common mode.

5. The purging device for changing a common motor to an explosion-proof motor according to claim 4, wherein: the outer surface of the rotating rod (38) and the surface of the rectangular groove (37) are jointly fixed with a torsion spring (36).

6. The purge device for changing a common motor into an explosion-proof motor according to claim 2, wherein: four jack (42) are run through jointly with sealing washer (22) to four slide (21).

7. The purge device for changing a common motor into an explosion-proof motor according to claim 2, wherein: the outer surface of the shell frame (11) is provided with a plurality of heat dissipation grooves (43).

8. A common motor to explosion proof motor purge apparatus according to claim 3, wherein: the outer surface of the swivel (24), the inner and outer surfaces of the first toothed ring (26), the inner and outer surfaces of the second toothed ring (27) and the inner and outer surfaces of the third toothed ring (29), and the inner side wall of the arc clamp (32) is provided with a plurality of tooth grooves;

The rotary ring (24) is meshed and connected with the first toothed ring (26) through the tooth grooves and the first gear (25), the outer surface of the first toothed ring (26) is meshed and connected with the corresponding fourth gear (35) through the tooth grooves and the outer surface of the third toothed ring (29), the inner sides of the arc clamps (32) are meshed and connected with the third gear (34) together, and the second toothed ring (27) is meshed and connected with the third toothed ring (29) through the tooth grooves and the second gear (28).

9. The purge device for changing a common motor into an explosion-proof motor according to claim 2, wherein: the sealing ring (22) is attached to the inner surface of the motor casing (2).