Powder selecting device with permanent magnet motor

Abstract

The utility model relates to the technical field of cement powder separation, in particular to a powder separation device with a permanent magnet motor. According to the technical scheme, the device comprises a bottom plate, an outer barrel, an inner barrel and air return blades, the outer barrel is arranged on the bottom plate through a supporting assembly, a sealing cover is arranged at the top end of the outer barrel, the inner barrel is arranged in the outer barrel, a material scattering disc is rotationally arranged on the sealing cover, a shaft rod is rotationally arranged on the material scattering disc, the bottom end of the shaft rod is rotationally arranged on the air return blades, and the bottom end of the shaft rod is rotationally arranged on the air return blades. The air return blade is arranged in the inner cylinder through a positioning assembly. According to the utility model, through the cooperation of the structures and the modular design of the rotating parts of the powder concentrator, the equipment is easier to maintain, upgrade and replace the parts, and the flexibility and adaptability of the equipment are improved.

Description

Technical Field

[0001] This utility model relates to the field of cement powder selection technology, and in particular to a powder selection device equipped with a permanent magnet motor. Background Technology

[0002] In cement production, particle selection is indeed a crucial step. Its main purpose is to remove excessively large or small particles from the cement clinker, ensuring that the particle size distribution of the cement particles is within a suitable range. This improves the strength and stability of the cement, and also enhances grinding efficiency.

[0003] During long-term use, the fixed return air blades of the air classifier constantly collide and rub against cement powder, causing the return air blades to wear out quickly. When replacing the return air blades, the existing air classifiers have a low degree of modularity, making it inconvenient to maintain and replace parts.

[0004] Therefore, we propose a powder classifier equipped with a permanent magnet motor to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a powder classifier equipped with a permanent magnet motor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a powder classifier equipped with a permanent magnet motor, comprising a base plate, an outer cylinder, an inner cylinder, and a return air vane. The outer cylinder is mounted on the base plate via a support assembly, and a cap is provided at the top of the outer cylinder. The inner cylinder is located inside the outer cylinder, and a material spreading disc is rotatably mounted on the cap. A shaft is rotatably mounted on the material spreading disc, and the bottom end of the shaft is rotatably mounted on the return air vane. The return air vane is located inside the inner cylinder via a positioning assembly.

[0007] The positioning assembly consists of a bracket, an inner cylinder, a ring seat, a pin, and a lower motor. The bracket is located on the inclined inner wall of the inner cylinder. The ring seat rests on the upper surface of each of the brackets. The pin is located on the lower surface of the ring seat and is movably inserted into the bracket. The lower motor is located on the lower surface of the ring seat, and the output end of the lower motor passes through the ring seat and is connected to the shaft end of the return air blade.

[0008] Preferably, the support assembly consists of a leg and a ring, the ring being disposed on the outer wall of the outer cylinder, the top end of the leg being disposed on the ring, and the bottom end of the leg being disposed on the base plate.

[0009] Preferably, the cover has a feed inlet.

[0010] Preferably, the upper surface of the cover is provided with an upper motor, and the output end of the upper motor passes through the cover and is connected to the spreading disc.

[0011] Preferably, the bottom end of the inner cylinder is provided with a guide pipe, which penetrates the side wall of the outer cylinder. The guide pipe is a coarse material outlet, and the bottom opening of the outer cylinder is a fine material outlet.

[0012] Preferably, the lower surface of the base plate is provided with four support seats, and the four support seats are arranged in a ring array on the lower surface of the base plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In use, the powder classifier equipped with a permanent magnet motor drives the upper and lower motors to rotate the spreading disc and return air blades. Coarse particles are separated, slide down the inner cylinder wall, and are discharged through the guide pipe. The dispersed fine particles enter the annular grading zone between the inner and outer cylinders, slide down the inner wall of the outer cylinder, and are discharged through the fine powder outlet.

[0015] Furthermore, when maintenance or replacement of the spreading disc or return air blade is required, remove the cover and unscrew it upwards. The upward force will pull the pin out of the bracket, and the spreading disc or return air blade can be removed from the outer cylinder.

[0016] After replacing the spreading disc or return air blade, insert the pin into the pin hole on the bracket to position the return air blade inside the inner cylinder. When the cover is installed on the outer cylinder, the cover applies pressure to the ring seat through the shaft to ensure the stable installation of the return air blade.

[0017] This invention utilizes a modular design for the rotating components of the air classifier, making the equipment easier to maintain, upgrade, and replace parts, thereby improving the equipment's flexibility and adaptability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the outer and inner cylinders of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Front view structural diagram;

[0021] Figure 4 For the present utility model Figure 2 A schematic diagram of the cross-sectional structure;

[0022] Figure 5 For the present utility model Figure 4 A schematic diagram of the main structure.

[0023] Figure label:

[0024] 1. Support base; 2. Base plate; 3. Guide pipe; 4. Support leg; 5. Ring; 6. Outer cylinder; 7. Feed inlet; 8. Cover; 9. Spreading disc; 10. Upper motor; 11. Return fan blade; 12. Shaft; 13. Bracket; 14. Inner cylinder; 15. Ring seat; 16. Pin; 17. Lower motor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] like Figures 1-5 As shown, the present invention proposes a powder classifier equipped with a permanent magnet motor, comprising a base plate 2, an outer cylinder 6, an inner cylinder 14, and a return air vane 11. The outer cylinder 6 is mounted on the base plate 2 by a support assembly, and a cap 8 is provided at the top of the outer cylinder 6. The inner cylinder 14 is located inside the outer cylinder 6. A material spreading disc 9 is rotatably mounted on the cap 8, and a shaft 12 is rotatably mounted on the material spreading disc 9. The bottom end of the shaft 12 is rotatably mounted on the return air vane 11, which is located inside the inner cylinder 14 by a positioning assembly.

[0028] Based on Example 1:

[0029] During use, the powder selection device equipped with a permanent magnet motor of this utility model drives the upper motor 10 and the lower motor 17 to rotate the spreading disc 9 and the return air blade 11. When the spreading disc 9 rotates, the inner cylinder 14 generates an upward airflow. The airflow rises to the space between the two cylinders and then descends. It is guided by the fixed return air blade 11 to re-enter the inner cylinder 14, forming a circulating airflow.

[0030] The cement powder to be sorted is introduced into the outer cylinder 6 through the feed inlet 7 and falls onto the spreading plate 9. The material is dispersed and thrown out by centrifugal force on the spreading plate 9. Under the action of the rotating and rising airflow, the material enters the grading zone of the inner cylinder 14. Under the action of centrifugal force and the collision of the fan blades, the coarse particles are separated and slide down the wall of the inner cylinder 14 and are discharged through the guide pipe 3. The dispersed fine particles enter the annular grading zone between the inner cylinder 14 and the outer cylinder 6. Under the action of gravity and inertia, the particles are separated from the airflow, slide down the inner wall of the outer cylinder 6 and are discharged through the fine material outlet.

[0031] Furthermore, when it is necessary to maintain or replace the spreading disc 9 or the return air blade 11, remove the cover 8 and unscrew the cover 8 upwards. At this time, the upward force will pull the pin 16 out of the bracket 13, and the spreading disc 9 and the return air blade 11 can be removed from the outer cylinder 6.

[0032] After the material spreading disc 9 or the return air blade 11 is replaced, the pin rod 16 is inserted into the pin hole on the bracket 13 so that the return air blade 11 is positioned inside the inner cylinder 14. When the cover 8 is installed in the outer cylinder 6, the cover 8 applies pressure to the ring seat 15 through the shaft rod 12, thereby ensuring that the return air blade 11 is installed stably.

[0033] Example 2

[0034] like Figures 1-5 As shown, the powder selection device with a permanent magnet motor proposed in this utility model, compared with the first embodiment, further includes: a support component consisting of a support leg 4 and a ring 5, the ring 5 being disposed on the outer wall of the outer cylinder 6, the top end of the support leg 4 being disposed on the ring 5, and the bottom end of the support leg 4 being disposed on the bottom plate 2. Through the design of the support component, the connection stability between the outer cylinder 6 and the bottom plate 2 is ensured.

[0035] The cover 8 has a feed inlet 7, through which the cement powder to be sorted is introduced into the outer cylinder 6.

[0036] The upper surface of the cover 8 is provided with an upper motor 10. The output end of the upper motor 10 passes through the cover 8 and is connected to the spreading disc 9. When the upper motor 10 works, it drives the spreading disc 9 to rotate.

[0037] The bottom end of the inner cylinder 14 is provided with a guide pipe 3, which penetrates the side wall of the outer cylinder 6. The guide pipe 3 is the coarse material outlet, and the bottom opening of the outer cylinder 6 is the fine material outlet. The coarse particles are separated and slide down the wall of the inner cylinder 14 and are discharged through the guide pipe 3, while the fine particles slide down the inner wall of the outer cylinder 6 and are discharged through the fine material outlet.

[0038] The positioning assembly consists of a bracket 13, an inner cylinder 14, a ring seat 15, a pin 16, and a lower motor 17. The bracket 13 is located on the inclined inner wall of the inner cylinder 14. The ring seat 15 rests on the upper surface of each bracket 13. The pin 16 is located on the lower surface of the ring seat 15 and is movably inserted into the bracket 13. The lower motor 17 is located on the lower surface of the ring seat 15, and the output end of the lower motor 17 passes through the ring seat 15 and is connected to the shaft end of the return air vane 11. Through the interlocking connection between the pin 16 and the bracket 13, the ring seat 15 is positioned, and the ring seat 15 and the bracket 13 are also easily moved apart. At the same time, the lower motor 17 drives the return air vane 11 to rotate. Both the upper motor 10 and the lower motor 17 are permanent magnet motors.

[0039] The lower surface of the base plate 2 is provided with support bases 1. There are four support bases 1 in total, and the positions of the four support bases 1 are arranged in a ring array on the lower surface of the base plate 2.

[0040] It should be noted that the upper motor 10 and the lower motor 17 are existing mature technologies, and their working principles and internal structures are known to those skilled in the art. This utility model only utilizes their functions and does not improve their internal structures. Therefore, it will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0041] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powder classifier equipped with a permanent magnet motor, comprising a base plate (2), an outer cylinder (6), an inner cylinder (14), and a return air vane (11), characterized in that: The outer cylinder (6) is mounted on the base plate (2) by a support assembly. The top of the outer cylinder (6) is provided with a cap (8). The inner cylinder (14) is located inside the outer cylinder (6). A material spreading disc (9) is rotatably mounted on the cap (8). A shaft (12) is rotatably mounted on the material spreading disc (9). The bottom end of the shaft (12) is rotatably mounted on the return air vane (11). The return air vane (11) is located inside the inner cylinder (14) by a positioning assembly. The positioning assembly consists of a bracket (13), an inner cylinder (14), a ring seat (15), a pin (16), and a lower motor (17). The bracket (13) is located on the inclined inner wall of the inner cylinder (14). The ring seat (15) rests on the upper surface of each bracket (13). The pin (16) is located on the lower surface of the ring seat (15) and is movably inserted into the bracket (13). The lower motor (17) is located on the lower surface of the ring seat (15), and the output end of the lower motor (17) passes through the ring seat (15) and is connected to the shaft end of the return air blade (11).

2. The powder classifier equipped with a permanent magnet motor according to claim 1, characterized in that: The support assembly consists of a leg (4) and a ring (5). The ring (5) is located on the outer wall of the outer cylinder (6). The top end of the leg (4) is located on the ring (5), and the bottom end of the leg (4) is located on the base plate (2).

3. A powder classifier equipped with a permanent magnet motor according to claim 1, characterized in that: The cover (8) has a feed inlet (7).

4. A powder classifier equipped with a permanent magnet motor according to claim 1, characterized in that: The upper surface of the cover (8) is provided with an upper motor (10), the output end of which passes through the cover (8) and is connected to the spreading disc (9).

5. A powder classifier equipped with a permanent magnet motor according to claim 1, characterized in that: The bottom end of the inner cylinder (14) is provided with a guide pipe (3), which penetrates the side wall of the outer cylinder (6). The guide pipe (3) is the coarse material outlet, and the bottom opening of the outer cylinder (6) is the fine material outlet.

6. A powder classifier equipped with a permanent magnet motor according to claim 1, characterized in that: The lower surface of the base plate (2) is provided with a support seat (1). There are four support seats (1) in total, and the positions of the four support seats (1) are arranged in a ring array on the lower surface of the base plate (2).

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