A sealing device for explosion-proof motor
By designing the closed cylinder and cover plate structure in the explosion-proof motor, using the shaft to drive the fan blades and cooling pipes, and combining the air extraction components of the filter and piston plate, the problems of poor heat dissipation and dust accumulation of the motor are solved, and more efficient heat dissipation is achieved and dust filtering extend the service life of the motor.
Patent Information
- Application Number
- CN202411440601.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-10-16
AI Technical Summary
After the explosion-proof motor is equipped with a sealing device, it is difficult to dissipate heat inside, resulting in excessive heating and shortened service life, and dust in the air entering the motor, resulting in a reduced heat dissipation effect.
A sealing device including a closed cylinder, a cover plate and an explosion-proof motor body is designed to drive the fan blades to promote the flow of gas through the rotating shaft, and combine the cooling pipe and filtering structure to achieve uniform flow of air and dust, and use telescopic parts and pistons. The reciprocating movement of the plate performs hot air extraction and cold air sucking, ensuring the circulating flow of the coolant and heat dissipation.
It improves the heat dissipation effect of the explosion-proof motor, avoids dust accumulation, extends service life, and maintains the clean state of the filter, ensuring efficient cooling of the motor.
Smart Images
Figure CN118971459B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of explosion-proof motors, and in particular relates to a sealing device for explosion-proof motors. Background Art
[0002] A dust explosion-proof motor refers to a motor whose casing is designed and manufactured according to specified conditions and can prevent dust from entering the motor casing or, although it cannot completely prevent dust from entering, the amount of dust entering does not hinder the safe operation of the motor, and the accumulation of internal dust is not easy to cause a combustion hazard, and it will not cause an explosion of the surrounding explosive dust mixture when in use. Its main characteristics are: the casing has a high degree of sealing to reduce or prevent dust from entering the casing. Even if dust enters, the amount of dust entering will not form an ignition hazard.
[0003] However, after the explosion-proof motor is equipped with a sealing device, it is difficult for the inside of the explosion-proof motor to dissipate heat in time, which can easily cause the explosion-proof motor to overheat, thereby shortening the service life of the explosion-proof motor. In response to the above technical problems, the applicant has retrieved some prior arts, such as the Chinese patent with patent announcement number CN115694038B. When in use, air can pass through its outer shell, so that impurities such as dust carried in the air will also enter the outer shell. Since the structural distribution in the outer shell will block the flow of air, the flow direction of air in the outer shell will become chaotic, causing dust to contact the explosion-proof motor. When it is not in use, the dust in the air will also enter the outer shell and contact the explosion-proof motor. After long-term use, a large amount of dust will accumulate on the explosion-proof motor, resulting in reduced heat dissipation effect of the explosion-proof motor. Summary of the invention
[0004] The purpose of the present invention is to provide a sealing device for an explosion-proof motor, aiming to solve the technical problem in the prior art that dust in the air can come into contact with the explosion-proof motor due to the setting problem of the heat dissipation structure, thereby reducing the heat dissipation effect of the explosion-proof motor.
[0005] The present invention is implemented as follows: a sealing device for an explosion-proof motor comprises a sealing cylinder, a cover plate and an explosion-proof motor body, wherein the explosion-proof motor body is located in the sealing cylinder and the cover plate is connected to one end of the sealing cylinder, a cooling cavity is arranged in the side wall of the sealing cylinder, a baffle is fixedly connected to one end of the sealing cylinder away from the cover plate, the baffle is an annular structure and is coaxially arranged with the sealing cylinder, and a first protective cylinder surrounding the baffle is fixedly connected to the end of the sealing cylinder;
[0006] A mounting ring located in the first protective cylinder is rotatably mounted on the baffle plate, a second protective cylinder is rotatably mounted on the mounting ring, the second protective cylinder is coaxially arranged with the first protective cylinder, the first protective cylinder and the end away from the baffle plate are connecting cylinders and a first fan blade is fixedly mounted on the outer side of the connecting cylinder, the explosion-proof motor body is provided with a rotating shaft, the rotating shaft is coaxially arranged with the closing cylinder and the rotating shaft passes through the second protective cylinder and the first protective cylinder, the rotating shaft is connected with the connecting cylinder and a second fan blade is fixedly mounted on the end of the rotating shaft output shaft;
[0007] A plurality of cooling tubes are fixedly installed in the cooling cavity, one end of the cooling tube passes through the side wall and the cover plate of the closed tube, and one end of the cooling tube away from the cover plate is connected to the area between the second protective tube and the first protective tube.
[0008] Further technical solution: the cover plate is provided with a conical structure and a cylindrical structure, a pressing block is fixedly installed on the inner wall of the conical structure of the cover plate, and the pressing block is in conflict with the explosion-proof motor body.
[0009] Further technical solution: The first protective tube is provided with a conical structure, the end with a larger opening of the first protective tube is fixedly installed and connected to the end surface of the closed tube and the first protective tube is coaxially arranged with the closed tube, and the end of the first protective tube away from the closed tube is provided with a cylindrical structure.
[0010] Further technical solution: the rotating shaft and the connecting tube are in interference fit, and when the rotating shaft rotates, the second protective tube is driven to rotate.
[0011] Further technical solution: A bending structure extending toward one side of the axis of the second protective tube is provided on the side wall of the inclined section, and a plurality of through grooves are provided on the bending structure, and filter screens are fixedly installed in the plurality of through grooves.
[0012] Further technical solution: an arc-shaped cleaning plate is fixedly installed in the first protective tube, the cleaning plate corresponds to the bending structure on the second protective tube, a cleaning brush is fixedly installed on the side of the cleaning plate close to the second protective tube, and the cleaning brush contacts the bending section of the second protective tube.
[0013] Further technical solution: Multiple groups of intake pipes are installed on the mounting ring, the intake pipes pass through the mounting ring and are provided with a first one-way valve. One end of the intake pipe outside the mounting ring is connected to an inner cavity surrounded by a closed cylinder, an explosion-proof motor body casing, and a cover plate, and an exhaust component for extracting air from the inner cavity is provided on the cover plate.
[0014] Further technical solution: The vacuum assembly includes a telescopic part, which is fixedly installed in the cylindrical structure of the cover plate. The output end of the telescopic part drives the piston plate to move. The piston plate is slidingly connected to the inner wall of the cylindrical structure of the cover plate. The piston plate is connected to an exhaust pipe, and a second one-way valve is provided on the exhaust pipe. The end of the cylindrical structure of the cover plate is connected to a power pipe, and a connecting head is provided at the end of the power pipe.
[0015] Further technical solution: A branch pipe connected to the cooling chamber is fixedly installed on the closing cylinder, and the end of the branch pipe away from the closing cylinder is an open structure. A closing plate is fixedly installed in the branch pipe, and a sliding rod is slidably installed on the closing plate. The sliding rod is distributed along the length direction of the branch pipe, and an inner push plate and an outer push plate are fixedly installed at both ends of the sliding rod. The branch pipe is connected to the power pipe through a connecting head, and a pressure relief pipe is connected to the branch pipe, and a solenoid valve is provided on the pressure relief pipe.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. When the explosion-proof motor body is running, the shaft drives the second fan blade to rotate, thereby promoting the flow of gas in the inner cavity, so that the gas in the inner cavity is in a flowing state, and then the air can be evenly in contact with the shell and the closed cylinder of the explosion-proof motor body, so that the heat on the shell of the explosion-proof motor body can be quickly transferred to the closed cylinder, accelerating the heat dissipation of the explosion-proof motor body, and at the same time, the coolant is cooled by the outside air passing through the coolant, thereby improving the cooling effect of the explosion-proof motor body. After entering the first protective cylinder, the dust particles carried in the outside air will directly leave the cooling pipe under the guidance of the second protective cylinder and driven by the air, and the air in the inner cavity does not participate in the external circulation, and dust impurities cannot enter the inner cavity, thereby avoiding damage and heat accumulation caused by the contact and accumulation of dust with the explosion-proof motor body, and improving the heat dissipation effect of the explosion-proof motor body.
[0018] 2. The piston plate is driven to move back and forth by the telescopic part. During the reciprocating movement, the piston plate can extract the hot air in the inner cavity to the outside and absorb the cold air filtered from the outside into the inner cavity, thereby continuously replacing the hot air in the inner cavity with cold air, and the extracted hot air can directly take away the heat in the inner cavity, thereby improving the heat exchange efficiency between the air in the inner cavity and the explosion-proof motor body, and further improving the heat dissipation effect of the explosion-proof motor body.
[0019] 3. During the reciprocating movement of the piston plate, the exhaust hot air can push the inner push plate to move, and the inner push plate pushes the coolant in the cooling chamber to circulate, so that the coolant can fully flow and contact the outer side of the closed cylinder, accelerating the heat dissipation effect of the coolant, thereby improving the heat dissipation effect of the explosion-proof motor body.
[0020] 4. When the second protective cylinder rotates, the filter screen can be in sliding contact with the cleaning brush, and then the filter screen is cleaned by the cleaning brush. At the same time, the setting of the bending section reduces the air flow speed in the extension area along the side wall of the second protective cylinder behind the bending section, and the air flow speed outside the area is faster. Since the gas flow speed away from the outer ring of the second protective cylinder is faster and the pressure is smaller, and the gas flow speed close to the outer ring of the second protective cylinder is slower and the pressure is larger, a thrust outward from the side wall of the second protective cylinder is generated. When the dust particles in the air move along the side wall of the second protective cylinder to the bending section, the thrust generated by the difference in gas flow rate and the inertia of the dust particles themselves make the dust particles quickly pass through the bending section, thereby reducing the number of dust particles moving to one side of the filter screen. At the same time, the cleaned dust will quickly leave the position of the filter screen driven by the air, ensuring that the filter screen can always be in a clean state, further reducing the probability of dust entering the second protective cylinder, ensuring the intake of cold air in the inner cavity, and improving the cooling effect on the explosion-proof motor body. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0022] Figure 2 It is a schematic diagram of the explosion structure of the present invention.
[0023] Figure 3 It is a schematic diagram of the structure inside the first protective tube in the present invention.
[0024] Figure 4 It is a schematic cross-sectional structural diagram of the sealing cylinder in the present invention.
[0025] Figure 5 for Figure 4 A magnified schematic diagram of the A1 region in the middle.
[0026] Figure 6 for Figure 4 A magnified schematic diagram of the A2 region in the middle.
[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of the cover plate in the present invention.
[0028] In the accompanying drawings: 1. closing cylinder; 2. baffle; 3. cooling chamber; 4. first protective cylinder; 5. mounting ring; 6. second protective cylinder; 7. filter screen; 8. cleaning plate; 9. cleaning brush; 10. connecting cylinder; 11. first fan blade; 12. suction pipe; 13. first non-return valve; 14. cooling pipe; 15. cover plate; 16. pressure block; 17. telescopic member; 18. piston plate; 19. exhaust pipe; 20. second non-return valve; 21. power pipe; 22. connector; 23. branch pipe; 24. closing plate; 25. inner push plate; 26. outer push plate; 27. slide rod; 28. pressure relief pipe; 29. explosion-proof motor body; 30. rotating shaft; 31. second fan blade; 32. exhaust assembly. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0030] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.
[0031] like Figure 1-Figure 7 As shown, a sealing device for explosion-proof motors provided by the present invention comprises a sealing cylinder 1, a cover plate 15 and an explosion-proof motor body 29, wherein the explosion-proof motor body 29 is located in the sealing cylinder 1 and the cover plate 15 is connected to one end of the sealing cylinder 1, the cover plate 15 is provided with a conical structure and a cylindrical structure, a pressing block 16 is fixedly installed on the inner wall of the conical structure of the cover plate 15, the pressing block 16 is in contact with the explosion-proof motor body 29, a cooling chamber 3 is provided in the side wall of the sealing cylinder 1, a baffle 2 is fixedly connected to the end of the sealing cylinder 1 away from the cover plate 15, the baffle 2 is an annular structure and is coaxially arranged with the sealing cylinder 1, a first protective cylinder 4 surrounding the baffle 2 is fixedly connected to the end of the sealing cylinder 1, the first protective cylinder 4 is provided with a conical structure, an end of the first protective cylinder 4 with a larger opening is fixedly installed and connected to the end face of the sealing cylinder 1 and the first protective cylinder 4 is coaxially arranged with the sealing cylinder 1, and an end of the first protective cylinder 4 away from the sealing cylinder 1 is provided with a cylindrical structure;
[0032] A mounting ring 5 located in the first protective tube 4 is rotatably mounted on the baffle 2, a second protective tube 6 is rotatably mounted on the mounting ring 5, the second protective tube 6 is coaxially arranged with the first protective tube 4, the first protective tube 4 and the end away from the baffle 2 are a connecting tube 10, and a first fan blade 11 is fixedly mounted on the outer side of the connecting tube 10, the explosion-proof motor body 29 is provided with a rotating shaft 30, the rotating shaft 30 is coaxially arranged with the closing tube 1 and the rotating shaft 30 passes through the second protective tube 6 and the first protective tube 4, the rotating shaft 30 is connected to the connecting tube 10, and a second fan blade 31 is fixedly mounted on the end of the output shaft of the rotating shaft 30, the rotating shaft 30 and the connecting tube 10 are interference fit, and the second protective tube 6 is driven to rotate when the rotating shaft 30 rotates;
[0033] A plurality of cooling tubes 14 are fixedly installed in the cooling chamber 3 . One end of the cooling tube 14 passes through the side wall of the closed tube 1 and the cover plate 15 . The end of the cooling tube 14 away from the cover plate 15 is connected to the area between the second protective tube 6 and the first protective tube 4 .
[0034] In actual application of this embodiment, the explosion-proof motor body 29 is installed in the closed cylinder 1, and then the end of the closed cylinder 1 is closed by the cover plate 15, and the side of the explosion-proof motor body 29 is made to contact with the baffle 2 by the pressing block 16, so as to achieve the fixation of the explosion-proof motor body 29, and the cover plate 15 and the closed cylinder 1 are fixedly connected by bolts. After the explosion-proof motor body 29 is placed in the closed cylinder 1, a gap is set between the rotating shaft 30 and the cylindrical structure of the first protective cylinder 4, and the outer shell of the explosion-proof motor body 29 is in contact with the inner wall of the closed cylinder 1. Since the outer shell of the explosion-proof motor body 29 is provided with a heat dissipation groove, the outer shell of the explosion-proof motor body 29, the closed cylinder 1, the cover plate 15 and the baffle 2 can enclose an inner cavity;
[0035] Coolant is added into the cooling chamber 3 through the feeding pipe and a set volume is left in the feeding pipe. When the explosion-proof motor body 29 is in use, the rotating shaft 30 rotates, and the heat generated by the explosion-proof motor body 29 is transferred to its shell, and then the heat is transferred to the closed cylinder 1 and cooled by the coolant in the cooling chamber 3. When the rotating shaft 30 rotates, it drives the second fan blades 31 to rotate. When the second fan blades 31 rotate, they promote the flow of gas in the inner cavity, so that the gas in the inner cavity is in a flowing state, and then the air can be evenly in contact with the shell of the explosion-proof motor body 29 and the closed cylinder 1, so that the heat on the shell of the explosion-proof motor body 29 can be quickly transferred to the closed cylinder 1, thereby accelerating the heat dissipation of the explosion-proof motor body 29;
[0036] The rotating shaft 30 and the connecting tube 10 are interference fit. When the rotating shaft 30 rotates, it drives the second protective tube 6 to rotate. When the second protective tube 6 rotates, it drives the first fan blade 11 to rotate. When the first fan blade 11 rotates, it pushes the air in the area between the second protective tube 6 and the first protective tube 4 to move into the cooling tube 14. The cold air moves in the cooling tube 14 to exchange heat with the coolant to cool the coolant. Then the air flows out directly from the cooling tube 14. The external cold air is replenished in the first protective tube 4 through the gap between the rotating shaft 30 and the cylindrical structure of the first protective tube 4.
[0037] Thereby, the air flow inside the inner cavity accelerates the transfer of heat from the explosion-proof motor body 29 to the closed tube 1, and the heat dissipation of the explosion-proof motor body 29 can be accelerated from the inside of the closed tube 1. At the same time, the coolant is cooled by the outside air passing through the coolant, thereby improving the cooling effect on the explosion-proof motor body 29. After entering the first protective tube 4, the dust particles carried in the outside air will directly leave the cooling pipe 14 under the guidance of the second protective tube 6 and the drive of the air, and the air in the inner cavity does not participate in the external circulation, and dust impurities cannot enter the inner cavity, thereby avoiding damage and heat accumulation caused by the contact and accumulation of dust with the explosion-proof motor body 29, thereby improving the heat dissipation effect of the explosion-proof motor body 29.
[0038] like Figure 3-Figure 7 As shown, a sealing device for explosion-proof motors provided by the present invention is provided. A bending structure extending toward one side of the axis of the second protective tube 6 is provided on the inclined section side wall. The bending structure is provided with multiple groups of through grooves and filter screens 7 are fixedly installed in the multiple groups of through grooves.
[0039] Specifically, an arc-shaped cleaning plate 8 is fixedly installed in the first protective tube 4, and the cleaning plate 8 corresponds to the bending structure position on the second protective tube 6. A cleaning brush 9 is fixedly installed on the side of the cleaning plate 8 close to the second protective tube 6, and the cleaning brush 9 contacts the bending section of the second protective tube 6.
[0040] Specifically, a plurality of groups of air intake pipes 12 are installed on the mounting ring 5. The air intake pipes 12 penetrate the mounting ring 5 and are provided with a first one-way valve 13. One end of the air intake pipe 12 located outside the mounting ring 5 is connected to an inner cavity surrounded by the closed cylinder 1, the outer shell of the explosion-proof motor body 29, and the cover plate 15. The cover plate 15 is provided with an exhaust assembly 32 for extracting air from the inner cavity.
[0041] Specifically, the vacuum assembly 32 includes a telescopic member 17, which is fixedly installed in the cylindrical structure of the cover plate 15. The output end of the telescopic member 17 drives the piston plate 18 to move. The piston plate 18 is slidably connected to the inner wall of the cylindrical structure of the cover plate 15. The piston plate 18 is connected to an exhaust pipe 19, and a second one-way valve 20 is provided on the exhaust pipe 19. The end of the cylindrical structure of the cover plate 15 is connected to a power tube 21, and a connector 22 is provided at the end of the power tube 21.
[0042] In actual application of this embodiment, the telescopic member 17 drives the piston plate 18 to reciprocate at a set speed. When the piston plate 18 moves in a direction away from the closed cylinder 1, the volume of the inner cavity becomes larger and presents a negative pressure state, and the second one-way valve 20 prevents the gas from entering the inner cavity from the exhaust pipe 19. Then, under the action of atmospheric pressure, the cold gas in the second protective cylinder 6 enters the inner cavity through the intake pipe 12. At this time, the air between the first protective cylinder 4 and the second protective cylinder 6 is drawn into the second protective cylinder 6 from the filter screen 7 for replenishment. The gas entering the second protective cylinder 6 is filtered by the filter screen 7 to prevent dust from entering the second protective cylinder 6. At the same time, the gas in the cylindrical structure on the cover plate 15 is squeezed out through the power pipe 21.
[0043] When the second protective cylinder 6 rotates, the filter screen 7 can be in sliding contact with the cleaning brush 9, and the filter screen 7 is cleaned by the cleaning brush 9. At the same time, the setting of the bending section reduces the air flow speed in the area extending along the side wall of the second protective cylinder 6 at the rear side of the bending section, and the air flow speed outside the area is faster. Since the gas flow speed away from the outer ring of the second protective cylinder 6 is faster and the pressure is smaller, the gas flow speed close to the outer ring of the second protective cylinder 6 is slower and the pressure is larger, which will generate an outward thrust from the side wall of the second protective cylinder 6, and the dust in the air will be removed. When the dust particles move along the side wall of the second protective tube 6 to the bending section, the thrust generated by the difference in gas flow rate and the inertia of the dust particles themselves will cause the dust particles to quickly cross the bending section, thereby reducing the number of dust particles moving to the side of the filter 7. At the same time, the cleaned dust will quickly leave the position of the filter 7 driven by the air, ensuring that the filter 7 can always be in a clean state, further reducing the probability of dust entering the second protective tube 6, ensuring the intake of cold air in the inner cavity, and improving the cooling effect on the explosion-proof motor body 29;
[0044] When the piston plate 18 moves toward the direction approaching the closed cylinder 1, the volume of the inner cavity decreases and the air pressure increases. Due to the existence of the first one-way valve 13, the gas cannot return to the second protective cylinder 6, and the gas will be discharged from the exhaust pipe 19 into the cylindrical structure of the cover plate 15. As a result, the piston plate 18 can extract the hot air in the inner cavity to the outside and absorb the filtered cold air from the outside into the inner cavity during the reciprocating movement, and can continuously replace the hot air in the inner cavity with cold air, and the extracted hot air can directly take away the heat in the inner cavity, thereby improving the heat exchange efficiency between the air in the inner cavity and the explosion-proof motor body 29, and further improving the heat dissipation effect of the explosion-proof motor body 29.
[0045] In an example of the present invention, the telescopic member 17 is an electric telescopic rod, and of course it can also be other components that can actively change the length, such as a hydraulic cylinder, and the electric telescopic rod drives the piston plate 18 to reciprocate.
[0046] like Figure 4 , Figure 5 , Figure 7 As shown, a sealing device for explosion-proof motors provided by the present invention is provided. A branch pipe 23 connected to the cooling chamber 3 is fixedly installed on the closing cylinder 1. The end of the branch pipe 23 away from the closing cylinder 1 is an open structure. A closing plate 24 is fixedly installed in the branch pipe 23. A slide bar 27 is slidably installed on the closing plate 24. The slide bar 27 is distributed along the length direction of the branch pipe 23, and an inner push plate 25 and an outer push plate 26 are fixedly installed at both ends of the slide bar 27. The branch pipe 23 is connected to the power pipe 21 through a connector 22. A pressure relief pipe 28 is connected to the branch pipe 23, and a solenoid valve is arranged on the pressure relief pipe 28.
[0047] When the present embodiment is actually used, the power tube 21 is connected to the branch tube 23 through the connector 22. When the piston plate 18 moves in a direction away from the closed tube 1, the solenoid valve on the pressure relief tube 28 is closed, and the gas in the cylindrical structure on the cover plate 15 is squeezed out through the power tube 21. The gas enters the branch tube 23 through the power tube 21 to push the outer push plate 26 to move, thereby causing the inner push plate 25 to move. When the inner push plate 25 moves, it pushes the coolant in the branch tube 23 to enter the cooling chamber 3, thereby promoting the flow of the coolant in the cooling chamber 3. When the piston plate 18 moves in a direction close to the closed tube 1, the solenoid valve on the pressure relief tube 28 is opened synchronously. At this time, the gas in the power tube 21 no longer applies thrust to the outer push plate 26, thereby causing the inner push plate 25 to reset under the action of the coolant pressure. Therefore, during the reciprocating movement of the piston plate 18, the coolant in the cooling chamber 3 can be pushed to circulate through the inner push plate 25, so that the coolant can fully flow and contact the outer side of the closed tube 1, thereby accelerating the heat dissipation effect of the coolant, thereby improving the heat dissipation effect of the explosion-proof motor body 29.
[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
[0049] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A sealing device for an explosion-proof motor, comprising a sealing cylinder (1), a cover plate (15) and an explosion-proof motor body (29), wherein the explosion-proof motor body (29) is located in the sealing cylinder (1) and the cover plate (15) is connected to one end of the sealing cylinder (1), characterized in that: A cooling chamber (3) is provided in the side wall of the closed cylinder (1); a baffle (2) is fixedly connected to one end of the closed cylinder (1) away from the cover plate (15); the baffle (2) is an annular structure and is coaxially arranged with the closed cylinder (1); and a first protective cylinder (4) surrounding the baffle (2) is fixedly connected to the end of the closed cylinder (1); The baffle (2) is rotatably mounted with a mounting ring (5) located inside the first protective tube (4), the mounting ring (5) is rotatably mounted with a second protective tube (6), the second protective tube (6) is coaxially arranged with the first protective tube (4), the first protective tube (4) and the end away from the baffle (2) are connecting tubes (10), and the first fan blades (11) are fixedly mounted on the outside of the connecting tube (10), the explosion-proof motor body (29) is provided with a rotating shaft (30), the rotating shaft (30) is coaxially arranged with the closing tube (1), and the rotating shaft (30) passes through the second protective tube (6) and the first protective tube (4), the rotating shaft (30) is connected with the connecting tube (10), and the second fan blades (31) are fixedly mounted on the end of the output shaft of the rotating shaft (30); A plurality of cooling tubes (14) are fixedly installed in the cooling cavity (3), one end of the cooling tube (14) passes through the side wall of the closed tube (1) and the cover plate (15), and one end of the cooling tube (14) away from the cover plate (15) is connected to the area between the second protective tube (6) and the first protective tube (4); A plurality of groups of air suction pipes (12) are mounted on the mounting ring (5), the air suction pipes (12) penetrate the mounting ring (5) and are provided with a first one-way valve (13), one end of the air suction pipe (12) located outside the mounting ring (5) is connected to an inner cavity surrounded by the sealing cylinder (1), the outer shell of the explosion-proof motor body (29) and the cover plate (15), and an air extraction component (32) for extracting air from the inner cavity is provided on the cover plate (15); The air extraction assembly (32) comprises a telescopic member (17), the telescopic member (17) being fixedly mounted in the cylindrical structure of the cover plate (15), the output end of the telescopic member (17) driving the piston plate (18) to move, the piston plate (18) being slidably connected to the inner wall of the cylindrical structure of the cover plate (15), the piston plate (18) being connected to an exhaust pipe (19), the exhaust pipe (19) being provided with a second one-way valve (20), the end of the cylindrical structure of the cover plate (15) being connected to a power pipe (21), the end of the power pipe (21) being provided with a connector (22).
2. The sealing device for explosion-proof motor according to claim 1, characterized in that: The cover plate (15) is provided with a conical structure and a cylindrical structure, and a pressing block (16) is fixedly mounted on the inner wall of the conical structure of the cover plate (15), and the pressing block (16) is in contact with the explosion-proof motor body (29).
3. The sealing device for explosion-proof motor according to claim 1, characterized in that: The first protective tube (4) is provided with a conical structure, the end of the first protective tube (4) with a larger opening is fixedly mounted and connected to the end surface of the closed tube (1), the first protective tube (4) and the closed tube (1) are coaxially arranged, and the end of the first protective tube (4) away from the closed tube (1) is provided with a cylindrical structure.
4. The sealing device for explosion-proof motor according to claim 1, characterized in that: The rotating shaft (30) and the connecting cylinder (10) are in interference fit, and when the rotating shaft (30) rotates, the second protective cylinder (6) is driven to rotate.
5. The sealing device for explosion-proof motor according to claim 1, characterized in that: The side wall of the inclined section of the second protective tube (6) is provided with a bending structure extending towards one side of the axis thereof, the bending structure is provided with a plurality of groups of through grooves, and filter screens (7) are fixedly installed in the plurality of groups of through grooves.
6. The sealing device for explosion-proof motor according to claim 5, characterized in that: A cleaning plate (8) with an arc-shaped structure is fixedly installed in the first protective tube (4), the cleaning plate (8) corresponds to the bent structure position on the second protective tube (6), and a cleaning brush (9) is fixedly installed on the side of the cleaning plate (8) close to the second protective tube (6), and the cleaning brush (9) contacts the bent section of the second protective tube (6).
7. The sealing device for explosion-proof motor according to claim 1, characterized in that: A branch pipe (23) connected to the cooling chamber (3) is fixedly mounted on the sealing tube (1); one end of the branch pipe (23) away from the sealing tube (1) is an open structure; a sealing plate (24) is fixedly mounted inside the branch pipe (23); a sliding rod (27) is slidably mounted on the sealing plate (24); the sliding rod (27) is distributed along the length direction of the branch pipe (23); and an inner push plate (25) and an outer push plate (26) are fixedly mounted on both ends of the sliding rod (27); the branch pipe (23) is connected to the power pipe (21) via a connector (22); a pressure relief pipe (28) is connected to the branch pipe (23); and a solenoid valve is arranged on the pressure relief pipe (28).