Magnetic sealing transmission device for bottom-entering kettle

Abstract

The utility model relates to the technical field of magnetic sealing, in particular to a magnetic sealing transmission device for a bottom-entering kettle, which comprises a reaction kettle body, a spacer sleeve fixedly arranged at the bottom of the reaction kettle body, an upper end of the spacer sleeve positioned inside the reaction kettle body, an inner magnetic rotor rotatably connected onto the spacer sleeve, and an impeller fixedly arranged on the outer wall of the inner magnetic rotor. A gear motor is arranged on the outer wall of the bottom of the reaction kettle body and coaxially connected with a coupler, an output shaft of the coupler is coaxially connected with a transmission shaft, the transmission shaft is sleeved with an outer magnetic rotor assembly, two mounting blocks are fixedly arranged on the peripheral wall of the coupler in a symmetrical structure, and fastening bolts are inserted into the mounting blocks. The bottom of the reaction kettle body is in threaded connection with a fastening bolt through the threaded hole. The problem of leakage of a traditional dynamic seal is thoroughly avoided, the sealing performance and operation safety of the reaction kettle body are improved, the maintenance difficulty is reduced, the heat dissipation efficiency and effect are improved, the magnetic coupling efficiency is improved, and stable operation of a magnetic sealing transmission device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic seals, in particular to a bottom-entry magnetic seal drive device for a kettle. Background Art

[0002] In industries such as chemical engineering, pharmaceuticals, and food, the reaction kettle is a key piece of equipment. Its sealing performance and transmission efficiency directly affect production efficiency and product quality. Traditional dynamic seals such as mechanical or packing seals are prone to leakage during long-term operation, especially when dealing with corrosive substances. This not only causes pollution but also increases safety risks, and raises the maintenance difficulty and downtime cost. To solve the defects of traditional dynamic seals, magnetic seal drive devices emerged. By using the magnetic field coupling of internal and external magnetic rotors to achieve non-contact power transmission, leakage is completely avoided, and it has advantages such as no leakage, full sealing, corrosion resistance, and energy conservation.

[0003] After retrieval, the Chinese patent with the publication number CN209254768U provides a reaction kettle with a large-torque air-cooled magnetic coupling drive, which includes a kettle body, a magnetic coupler, a driving motor, and a stirring system. It is characterized in that the magnetic coupler is composed of a support assembly and a magnetic drive assembly. The support assembly consists of a lower support frame, an upper sealing cover, a lower sealing cover, an upper end shaft, a lower end shaft, and an upper support frame. The outer side of the upper end shaft is sleeved with a magnetic drive assembly. The magnetic drive assembly is composed of an inner magnetic rotor and an outer magnetic rotor. There is lubricating oil in the cavity between the upper end shaft and the inner magnetic rotor, and it has the advantages of simple structure, high efficiency, energy conservation, economic environmental protection, and durability.

[0004] However, it is found during use that when the outer magnetic rotor needs to be repaired or replaced, a large number of components need to be disassembled, which increases the operation complexity and maintenance time. During high-speed operation, certain heat will be generated between the inner magnetic rotor and the outer magnetic rotor. During long-term use, it is easy to cause the temperature to rise, and there are problems of uneven heat dissipation or low heat dissipation efficiency, which affects the magnetic coupling efficiency and even damages the magnetic rotor material, and is not conducive to the use of the bottom-entry magnetic seal drive device for a kettle. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a bottom-entry magnetic seal drive device for a kettle, which solves the technical problems that when the outer magnetic rotor needs to be repaired or replaced, a large number of components need to be disassembled, increasing the operation complexity and maintenance time, and during high-speed operation, certain heat will be generated between the inner magnetic rotor and the outer magnetic rotor. During long-term use, it is easy to cause the temperature to rise, and there are problems of uneven heat dissipation or low heat dissipation efficiency, which affects the magnetic coupling efficiency and even damages the magnetic rotor material, and is not conducive to the use of the bottom-entry magnetic seal drive device for a kettle.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: A bottom-entry magnetic seal drive device for a kettle, comprising a reaction kettle body. A isolation sleeve is fixedly provided at the bottom of the reaction kettle body. The upper end of the isolation sleeve is located inside the reaction kettle body. An inner magnetic rotor is rotatably connected to the isolation sleeve. An impeller is fixedly provided on the outer wall of the inner magnetic rotor. A reduction motor is provided on the outer wall of the bottom of the reaction kettle body. A coupling is coaxially connected to the reduction motor. A transmission shaft is coaxially connected to the output shaft of the coupling. An outer magnetic rotor assembly is sleeved on the transmission shaft. Two mounting blocks are symmetrically fixedly provided on the outer peripheral wall of the coupling. A fastening bolt is inserted into the mounting block. The bottom of the reaction kettle body is threadedly connected to the fastening bolt through a threaded hole.

[0007] Preferably, the outer magnetic rotor assembly includes a first rotor fixedly provided on the transmission shaft. A plurality of connecting bolts are annularly and arrayedly provided on the top surface of the first rotor. A plurality of second rotors are inserted into the transmission shaft. The second rotors are inserted and matched with the connecting bolts through through holes.

[0008] Preferably, the outer peripheral walls of the first rotor and the second rotors are respectively in clearance fit with the inner wall of the isolation sleeve. A hexagon bolt is threadedly connected to the upper end of the connecting bolt. The bottom surface of the hexagon bolt abuts against the top surface of the second rotor located at the upper end.

[0009] Through the above technical solution, separate the hexagon bolt from the connecting bolt, separate the through hole on the second rotor from the hexagon bolt, and remove it from the transmission shaft to disassemble and replace the corresponding second rotor.

[0010] Preferably, a plurality of ventilation round grooves are uniformly arranged on the bottom surface of the isolation sleeve. A circulation groove is provided inside the upper end of the isolation sleeve. A plurality of air inlet grooves are communicated with the circulation groove. A plurality of inclined grooves are uniformly arranged on the air inlet grooves.

[0011] Preferably, a fan blade is sleeved on the outer peripheral wall of the transmission shaft. The fan blade is located between the coupling and the isolation sleeve. A gap is left between the fan blade and the mounting block.

[0012] Through the above technical solution, when the transmission shaft rotates, it drives the fan blade to rotate synchronously. The fan blade generates an upward airflow. Part of these airflows enters the circulation groove inside the isolation sleeve through the ventilation round groove, and the other part enters the inclined groove through the gap between the isolation sleeve and the outer magnetic rotor assembly and then enters the circulation groove.

[0013] Preferably, an air outlet groove is communicated with the circulation groove. An exhaust pipe is communicated with the air outlet groove. The exhaust pipe is fixedly provided on the outer wall of the lower end of the isolation sleeve.

[0014] Through the above technical solution, the continuously conveyed airflow passes the air in the circulation groove through the air outlet groove into the exhaust pipe and is discharged outside the isolation sleeve.

[0015] Advantages of the present utility model:

[0016] 1. The output shaft of the reduction motor drives the coupling to transmit power to the transmission shaft, thereby driving the outer magnetic rotor assembly to rotate. When the outer magnetic rotor assembly rotates, the permanent magnetic field can penetrate the air gap and the isolation sleeve, and the generated magnetic field drives the inner magnetic rotor to rotate synchronously, thereby driving the impeller to stir the materials inside the reactor body. This non-contact power transmission method completely avoids the leakage problem of traditional dynamic seals, improves the sealing performance and operation safety of the reactor body.

[0017] 2. When it is necessary to replace and repair the second rotor in the outer magnetic rotor assembly, separate the hexagon bolt from the connecting bolt, separate it from the hexagon bolt through the through hole on the second rotor, and remove it from the transmission shaft to disassemble and replace the corresponding second rotor, reducing the maintenance difficulty. The process of replacing a single second rotor is simple and fast, shortening the downtime of the equipment and improving the production efficiency.

[0018] 3. While the transmission shaft rotates, it drives the fan blades to rotate synchronously. The fan blades generate upward airflows. Part of these airflows enter the flow channel inside the isolation sleeve through the ventilation round groove, and the other part enters the inclined groove through the gap between the isolation sleeve and the outer magnetic rotor assembly and then enters the flow channel. The air in the flow channel exchanges heat with the isolation sleeve, absorbing part of the heat generated during the operation of the inner magnetic rotor and the outer magnetic rotor assembly, cooling the isolation sleeve while taking away part of the heat of the inner magnetic rotor and the outer magnetic rotor assembly. At this time, the continuously conveyed airflows send the air in the flow channel into the exhaust duct through the air outlet groove and are discharged outside the isolation sleeve. Connect the exhaust duct to the external pipeline to transport the hot air to a position far from the reactor body, reducing the temperature of the isolation sleeve, improving the heat dissipation efficiency and effect, improving the magnetic coupling efficiency, and ensuring the stable operation of the magnetic seal transmission device. Description of the Drawings

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

[0020] Figure 2 It is a sectional perspective view of the structure of the reactor body of the present utility model;

[0021] Figure 3 It is a schematic diagram of the disassembled structure of the isolation sleeve of the present utility model;

[0022] Figure 4 It is a bottom perspective view of the structure of the outer magnetic rotor assembly of the present utility model;

[0023] Figure 5 It is a schematic assembly diagram of the structure of the first rotor of the present utility model;

[0024] Figure 6Schematic diagram of the flow channel structure of the present utility model;

[0025] Figure 7 Schematic diagram of the air intake channel structure of the present utility model.

[0026] In the figure: 1, reaction kettle body; 2, isolation sleeve; 3, inner magnetic rotor; 4, impeller; 5, reduction motor; 6, coupling; 7, transmission shaft; 8, outer magnetic rotor assembly; 801, first rotor; 802, connecting bolt; 803, second rotor; 804, through hole; 805, hexagon bolt; 9, mounting block; 10, fastening bolt; 11, ventilation circular groove; 12, flow channel; 13, air intake channel; 14, inclined groove; 15, air outlet channel; 16, exhaust duct; 17, fan blade. Specific embodiments

[0027] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification. Embodiment 1

[0028] As Figures 1-5 shown, this embodiment provides a bottom-entry magnetic seal drive device for a kettle, including a reaction kettle body 1. An isolation sleeve 2 is fixedly provided at the bottom of the reaction kettle body 1. The upper end of the isolation sleeve 2 is located inside the reaction kettle body 1. An inner magnetic rotor 3 is rotatably connected to the isolation sleeve 2. An impeller 4 is fixedly provided on the outer wall of the inner magnetic rotor 3. A reduction motor 5 is provided on the outer wall of the bottom of the reaction kettle body 1. A coupling 6 is coaxially connected to the reduction motor 5. The output shaft of the coupling 6 is coaxially connected to a transmission shaft 7. An outer magnetic rotor assembly 8 is sleeved on the transmission shaft 7. Two mounting blocks 9 are symmetrically fixedly provided on the outer peripheral wall of the coupling 6. Fastening bolts 10 are inserted into the mounting blocks 9. The bottom of the reaction kettle body 1 is threadedly connected to the fastening bolts 10 through threaded holes.

[0029] The outer magnetic rotor assembly 8 includes a first rotor 801. The first rotor 801 is fixedly provided on the transmission shaft 7. A plurality of connecting bolts 802 are fixedly provided on the top surface of the first rotor 801 in an annular array structure. A plurality of second rotors 803 are inserted into the transmission shaft 7. The second rotors 803 are inserted and matched with the connecting bolts 802 through through holes 804. The outer peripheral walls of the first rotor 801 and the second rotors 803 are respectively in clearance fit with the inner wall of the isolation sleeve 2. The upper end of the connecting bolt 802 is threadedly connected to a hexagon bolt 805. The bottom surface of the hexagon bolt 805 abuts against the top surface of the second rotor 803 located at the upper end; separating the hexagon bolt 805 from the connecting bolt 802 and separating the through hole 804 on the second rotor 803 from the hexagon bolt 805, and removing it from the transmission shaft 7 can disassemble and replace the corresponding second rotor 803.

[0030] During use, the output shaft of the reduction motor 5 drives the coupling 6 to transmit power to the transmission shaft 7, which in turn drives the outer magnetic rotor assembly 8 to rotate. When the outer magnetic rotor assembly 8 rotates, the permanent magnetic field can penetrate the air gap and the isolation sleeve 2, and the generated magnetic field drives the inner magnetic rotor 3 to rotate synchronously, thereby driving the impeller 4 to stir the materials inside the reactor body 1. This non-contact power transmission method completely avoids the leakage problem of traditional dynamic seals and improves the sealing performance and operation safety of the reactor body 1;

[0031] When it is necessary to replace and repair the second rotor 803 in the outer magnetic rotor assembly 8, separate the hexagon bolt 805 from the connecting bolt 802, separate from the hexagon bolt 805 through the through hole 804 on the second rotor 803, and remove it from the transmission shaft 7 to disassemble and replace the corresponding second rotor 803. This reduces the maintenance difficulty. The process of replacing a single second rotor 803 is simple and fast, shortening the downtime of the equipment and improving the production efficiency. Embodiment 2

[0032] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 shown, on the basis of Embodiment 1, the bottom surface of the isolation sleeve 2 is provided with a plurality of ventilation round grooves 11 in a uniformly arranged structure. An air circulation groove 12 is provided inside the upper end of the isolation sleeve 2. A plurality of air inlet grooves 13 are communicated with the air circulation groove 12. A plurality of inclined grooves 14 are provided in a uniformly arranged structure on the air inlet grooves 13. A fan blade 17 is sleeved on the outer peripheral wall of the transmission shaft 7. The fan blade 17 is located between the coupling 6 and the isolation sleeve 2, and there is a gap between the fan blade 17 and the mounting block 9; while the transmission shaft 7 rotates, it drives the fan blade 17 to rotate synchronously. The fan blade 17 generates an upward air flow. Part of these air flows enters the air circulation groove 12 inside the isolation sleeve 2 through the ventilation round grooves 11, and the other part enters the inclined groove 14 from the gap between the isolation sleeve 2 and the outer magnetic rotor assembly 8 and then enters the air circulation groove 12.

[0033] An air outlet groove 15 is communicated with the air circulation groove 12, and an exhaust duct 16 is communicated with the air outlet groove 15. The exhaust duct 16 is fixed on the outer wall of the lower end of the isolation sleeve 2; the continuously conveyed air flow passes the air in the air circulation groove 12 through the air outlet groove 15 into the exhaust duct 16 and is discharged outside the isolation sleeve 2.

[0034] During use, while the transmission shaft 7 rotates, it drives the fan blade 17 to rotate synchronously. The fan blade 17 generates an upward airflow. Part of these airflows enters the flow channel 12 inside the isolation sleeve 2 through the ventilation circular groove 11, and the other part enters the inclined groove 14 from the gap between the isolation sleeve 2 and the outer magnetic rotor assembly 8 and then enters the flow channel 12. The air in the flow channel 12 exchanges heat with the isolation sleeve 2, absorbs part of the heat generated during the operation of the inner magnetic rotor 3 and the outer magnetic rotor assembly 8, cools the isolation sleeve 2 while taking away part of the heat of the inner magnetic rotor 3 and the outer magnetic rotor assembly 8. At this time, the continuously conveyed airflow passes the air in the flow channel 12 through the air outlet groove 15 into the exhaust duct 16 and is discharged outside the isolation sleeve 2. Connecting the exhaust duct 16 to an external pipeline conveys the hot air to a position far from the reaction kettle body 1, reduces the temperature of the isolation sleeve 2, improves the heat dissipation efficiency and effect, improves the magnetic coupling efficiency, and ensures the stable operation of the magnetic seal transmission device.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A magnetic sealing transmission device for a bottom-entry reactor, comprising a reactor body (1), wherein an isolation sleeve (2) is fixedly arranged at the bottom of the reactor body (1), and characterized in that: The upper end of the isolation sleeve (2) is located inside the reactor body (1); the isolation sleeve (2) is rotatably connected to an inner magnetic rotor (3); an impeller (4) is fixedly provided on the outer wall of the inner magnetic rotor (3); a reduction motor (5) is provided on the outer wall of the bottom of the reactor body (1); a coupling (6) is coaxially connected to the reduction motor (5); a transmission shaft (7) is coaxially connected to the output shaft of the coupling (6); an outer magnetic rotor assembly (8) is sleeved on the transmission shaft (7); two mounting blocks (9) are fixedly provided on the outer peripheral wall of the coupling (6) in a symmetrical structure; fastening bolts (10) are inserted into the mounting blocks (9); and the bottom of the reactor body (1) is threadedly connected to the fastening bolts (10) through threaded holes.

2. The magnetic sealing transmission device for bottom-entry kettle according to claim 1, characterized in that: The external magnetic rotor assembly (8) comprises a first rotor (801), the first rotor (801) being fixedly mounted on a transmission shaft (7), a plurality of connecting bolts (802) being fixedly mounted on the top surface of the first rotor (801) in an annular array structure, a plurality of second rotors (803) being plugged into the transmission shaft (7), the second rotors (803) being plugged into and mated with the connecting bolts (802) via through holes (804).

3. The magnetic sealing transmission device for bottom-entry kettle according to claim 2, characterized in that: The outer peripheral walls of the first rotor (801) and the second rotor (803) are respectively loosely matched with the inner wall of the isolation sleeve (2); the upper end of the connecting bolt (802) is threadedly connected with a hexagonal bolt (805); and the bottom surface of the hexagonal bolt (805) abuts against the top surface of the second rotor (803) located at the upper end.

4. The magnetic sealing transmission device for bottom-entry kettle according to claim 1, characterized in that: The bottom surface of the isolation sleeve (2) is provided with a plurality of circular ventilation grooves (11) in a uniformly arranged structure, the upper end of the isolation sleeve (2) is provided with a circulation groove (12), the circulation groove (12) is connected to a plurality of air inlet grooves (13), and the air inlet groove (13) is provided with a plurality of inclined grooves (14) in a uniformly arranged structure.

5. The magnetic sealing transmission device for bottom-entry kettle according to claim 4, characterized in that: The circulation slot (12) is connected to an air outlet slot (15), and the air outlet slot (15) is connected to an exhaust pipe (16). The exhaust pipe (16) is fixedly arranged on the outer wall of the lower end of the isolation sleeve (2).

6. The magnetic seal transmission device for bottom-entry kettle according to claim 1, characterized in that: A fan blade (17) is sleeved on the outer peripheral wall of the transmission shaft (7); the fan blade (17) is located between the coupling (6) and the isolation sleeve (2); and a gap is left between the fan blade (17) and the mounting block (9).

Images