A centrifuge for separating fine powders

Abstract

This utility model discloses a centrifuge for separating fine powders, including an outer cylinder, an inner cylinder, a sweeping mechanism, an air inlet pipe, an exhaust pipe, a first discharge pipe, a second discharge pipe, and a filter screen. The outer cylinder forms a receiving cavity, with its lower end connected to the first discharge pipe and its side connected to the exhaust pipe. A filter screen, in an annular shape, is installed at the connection point. The inner cylinder is fixed within the receiving cavity, with its upper end open. Its lower end connects to the second discharge pipe and the air inlet pipe. A connecting seat is annular, with its inner side rotatably connected to the outer side of the inner cylinder. A fan blade is fixedly connected to the outer side of the connecting seat. Multiple sweeping heads are arranged circumferentially along the connecting seat, with one end fixedly connected to the connecting seat and the other end abutting against the filter screen. In this utility model, the airflow between the inner and outer cylinders is downward. The fan blade, driven by the airflow, rotates the connecting seat, causing the sweeping heads to rotate and sweep the powder off the filter screen, thus preventing clogging.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal separator technology, specifically to a centrifuge for separating fine powders. Background Technology

[0002] In chemical production processes, it is often necessary to grind raw materials to a certain particle size, and centrifugal separators are commonly used. Centrifugal separators are devices that use the combined action of centrifugal force and airflow to separate solid particles of different sizes. Their function is to achieve the separation of coarse and fine particles by adjusting the separating force. Fine particles are discharged with the airflow, while coarse particles are collected separately by sedimentation.

[0003] To prevent material backflow, a filter screen is usually installed at the exhaust pipe to block the material. However, after long-term operation, the material may adhere to the filter screen and needs to be cleaned. Otherwise, clogging the filter screen will lead to poor airflow and affect the separation efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a centrifuge for separating fine powders, thereby solving the problem of filter clogging in the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows: A centrifuge for separating fine powders includes an outer cylinder, an inner cylinder, a sweeping mechanism, an air inlet pipe, an exhaust pipe, a first discharge pipe, a second discharge pipe, and a filter screen, wherein: a receiving cavity is formed in the outer cylinder, the lower end of the outer cylinder is connected to the first discharge pipe, the side of the outer cylinder is connected to the exhaust pipe, and a filter screen is provided at the connection, the filter screen being annular; the inner cylinder is fixed in the receiving cavity, the upper end of the inner cylinder is open, and the lower end of the inner cylinder is connected to the second discharge pipe and the air inlet pipe; the sweeping mechanism includes a connecting seat, a fan blade, and a sweeping head, the connecting seat being annular, the inner side of the connecting seat being rotatably connected to the outer side of the inner cylinder, the fan blade being fixedly connected to the outer side of the connecting seat, and a plurality of sweeping heads being arranged circumferentially along the connecting seat, one end of the sweeping head being fixedly connected to the connecting seat, and the other end abutting against the filter screen.

[0006] Preferably, the exhaust pipe and the filter screen are configured as two sets.

[0007] Preferably, the sweeping mechanism is configured in two sets, each corresponding to one of the two filter screens.

[0008] Preferably, the centrifuge for separating fine powders further includes a valve and a dust removal pipe. The valve is disposed on an exhaust pipe, the exhaust pipe has a dust removal section from the receiving cavity to the valve, one end of the dust removal pipe is connected to the exhaust pipe and the connection is located in the dust removal section, and the other end of the dust removal pipe is connected to a controllable positive pressure airflow.

[0009] Preferably, the outer cylinder protrudes outward to form an annular connecting cavity, and the filter screen is disposed between the connecting cavity and the receiving cavity.

[0010] Preferably, the centrifuge for separating fine powders further includes a support base, which is fixed to the bottom of the outer cylinder.

[0011] Preferably, the centrifuge for separating fine powders further includes a motor, a drive shaft, a centrifuge disc, an air blower, and a feed pipe. The drive shaft is rotatably connected to the outer cylinder, with one end connected to the motor and the other end connected to the centrifuge disc and the air blower. The centrifuge disc is higher than the air blower, and the feed pipe is fixedly connected to the upper side of the outer cylinder.

[0012] Preferably, the exhaust pipe is connected to the intake end of the intake pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model include: the airflow between the inner and outer cylinders is downward, and the fan blades will drive the connecting seat to rotate under the action of the airflow, which will drive the cleaning head to rotate and sweep the powder off the filter screen, thereby preventing the filter screen from clogging. Attached Figure Description

[0014] Figure 1 This is a perspective view of the centrifuge for separating fine powders provided by this utility model; Figure 2 This is a simplified structural diagram of the centrifuge for separating fine powders provided by this utility model; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a perspective view of the sweeping mechanism of a centrifuge for separating fine powders provided by this utility model; Reference numerals in the attached drawings: 1-outer cylinder, 2-inner cylinder, 3-sweeping mechanism, 4-air inlet pipe, 5-exhaust pipe, 6-first discharge pipe, 7-second discharge pipe, 8-filter screen, 9-valve, 1a-dust removal pipe, 2a-support base, 3a-motor, 4a-drive shaft, 5a-centrifugal disc, 6a-air blower, 7a-feed pipe, 11-accommodating cavity, 12-connecting cavity, 31-connecting seat, 32-fan blade, 33-sweeping head. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] Please see Figures 1 to 4This embodiment provides a centrifuge for separating fine powders, including an outer cylinder 1, an inner cylinder 2, a sweeping mechanism 3, an air inlet pipe 4, an exhaust pipe 5, a first discharge pipe 6, a second discharge pipe 7, and a filter screen 8. The outer cylinder 1 serves as an overall support structure, the inner cylinder 2 is used for powder separation, the sweeping mechanism 3 is used to clean the powder on the filter screen 8, the air inlet pipe 4 is used to introduce gas into the inner cylinder 2, the exhaust pipe 5 is used for the gas to be discharged from the outer cylinder 1, the first discharge pipe 6 is used for the discharge of fine materials, the second discharge pipe 7 is used for the discharge of coarse materials, and the filter screen 8 is used to block the powder and prevent it from entering the exhaust pipe 5.

[0017] An outer cylinder 1 forms a receiving cavity 11. The lower end of the outer cylinder 1 is connected to a first discharge pipe 6, and the side of the outer cylinder 1 is connected to an exhaust pipe 5. A filter screen 8 is provided at the connection point. The filter screen 8 is annular. Preferably, the outer cylinder 1 protrudes outward to form an annular connecting cavity 12. A filter screen 8 is provided between the connecting cavity 12 and the receiving cavity 11, and the exhaust pipe 5 is connected to the outside of the connecting cavity 12. The inner cylinder 2 is fixed in the receiving cavity 11. The upper end of the inner cylinder 2 is open. The lower end of the inner cylinder 2 is connected to a second discharge pipe 7 and an air inlet pipe 4. The air inlet pipe 4 introduces gas into the inner cylinder 2. Therefore, the airflow in the inner cylinder 2 rises and enters the space between the inner cylinder 2 and the outer cylinder 1 from the upper end of the inner cylinder 2, and is finally discharged through the exhaust pipe 5. Preferably, the exhaust pipe 5 is connected to the air inlet end of the air inlet pipe 4, so the airflow in the receiving cavity 11 is circulated.

[0018] Preferably, the exhaust pipe 5 and the filter screen 8 are configured as two sets. Further, the sweeping mechanism 3 is configured as two sets, each corresponding to one of the two filter screens 8. Preferably, the centrifuge for separating fine powders further includes a valve 9 and a dust removal pipe 1a. The valve 9 is installed on the exhaust pipe 5, which has a dust removal section from the receiving cavity 11 to the valve 9. One end of the dust removal pipe 1a is connected to the exhaust pipe 5, and the connection is located in the dust removal section. The other end of the dust removal pipe 1a is connected to a controllable positive pressure airflow, which can generally be directly connected to a fan. When the valve 9 on one exhaust pipe 5 is closed, the airflow in the receiving cavity 11 cannot be discharged from that exhaust pipe 5 and must be discharged from the other exhaust pipe 5. Airflow is introduced into the dust removal pipe 1a on the exhaust pipe 5 of the closed valve 9 and enters the receiving cavity 11 through the filter screen 8, thereby blowing off the powder adhering to the filter screen 8. This can blow off the powder in the mesh of the filter screen 8 that the cleaning head 33 cannot clean, further reducing the clogging of the filter holes. Therefore, the two sets of exhaust pipes 5 work alternately during dust removal, and the two sets of exhaust pipes 5 can work simultaneously when dust removal is not required. The valve 9 can be electronic for easy control.

[0019] The sweeping mechanism 3 includes a connecting seat 31, a fan blade 32, and a sweeping head 33. The connecting seat 31 is annular, and its inner side is rotatably connected to the outer side of the inner cylinder 2. The inner cylinder 2 and the connecting seat 31 can be rotatably connected by bearings, or multiple rollers can be installed between the connecting seat 31 and the inner cylinder 2 to connect them. The fan blade 32 is fixedly connected to the outer side of the connecting seat 31. Multiple sweeping heads 33 are arranged circumferentially along the connecting seat 31. One end of each sweeping head 33 is fixedly connected to the connecting seat 31, and the other end abuts against the filter screen 8. When the airflow between the inner cylinder 2 and the outer cylinder 1 is downward, the fan blade 32 pushes the connecting seat 31 to rotate, causing the sweeping head 33 to rotate and sweep the powder off the filter screen 8.

[0020] Preferably, the centrifuge for separating fine powders further includes a support base 2a, which is fixed to the bottom of the outer cylinder 1 to support the outer cylinder 1.

[0021] Preferably, the centrifuge for separating fine powders further includes a motor 3a, a drive shaft 4a, a centrifugal disc 5a, an air blower 6a, and a feed pipe 7a. The drive shaft 4a is rotatably connected to the outer cylinder 1, with one end connected to the motor 3a and the other end connected to the centrifugal disc 5a and the air blower 6a. The centrifugal disc 5a is higher than the air blower 6a. The feed pipe 7a is fixedly connected to the upper side of the outer cylinder 1, and the material to be separated is fed onto the centrifugal disc 5a. When the material falls onto the high-speed rotating centrifugal disc 5a, it is dispersed due to centrifugal force. The air blower 6a rotates and generates an upward airflow. The lighter fine powder in the material follows the airflow upward into the space between the inner cylinder 2 and the outer cylinder 1, and is further discharged from the first discharge pipe 6, while the coarser powder falls down and is discharged from the second discharge pipe 7. Preferably, the second discharge pipe 7 can be connected to a pulverizer to further grind the coarse material, and then the ground material is fed into the feed pipe 7a to achieve cyclic separation.

[0022] In summary, the centrifuge provided by this utility model for separating fine powders has an airflow between the inner cylinder 2 and the outer cylinder 1. The airflow causes the fan blades 32 to drive the connecting seat 31 to rotate, which in turn drives the cleaning head 33 to rotate and sweep the powder off the filter screen 8, thereby preventing the filter screen 8 from becoming clogged.

[0023] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A centrifuge for separating fine powders, characterized by, It includes an outer cylinder, an inner cylinder, a sweeping mechanism, an air inlet pipe, an exhaust pipe, a first discharge pipe, a second discharge pipe, and a filter screen, wherein: The outer cylinder forms a receiving cavity, the lower end of the outer cylinder is connected to the first discharge pipe, the side of the outer cylinder is connected to the exhaust pipe, and a filter screen is provided at the connection point. The filter screen is annular. The inner cylinder is fixed in the receiving cavity, the upper end of the inner cylinder is open, and the lower end of the inner cylinder is connected to the second discharge pipe and the air inlet pipe; The sweeping mechanism includes a connecting seat, a fan blade, and a sweeping head. The connecting seat is ring-shaped, and the inner side of the connecting seat is rotatably connected to the outer side of the inner cylinder. The fan blade is fixedly connected to the outer side of the connecting seat. Multiple sweeping heads are arranged circumferentially along the connecting seat. One end of each sweeping head is fixedly connected to the connecting seat, and the other end abuts against the filter screen.

2. A centrifuge for separating fine powders according to claim 1, wherein The exhaust pipe and the filter screen are configured as two sets.

3. A centrifuge for separating fine powders according to claim 2, wherein The sweeping mechanism is configured in two sets, each corresponding to one of the two filter screens.

4. A centrifuge for separating fine powders according to claim 1, wherein The centrifuge for separating fine powders also includes a valve and a dust removal pipe. The valve is disposed on an exhaust pipe, and the exhaust pipe has a dust removal section from the receiving cavity to the valve. One end of the dust removal pipe is connected to the exhaust pipe, and the connection point is located in the dust removal section. The other end of the dust removal pipe is connected to a controllable positive pressure airflow.

5. A centrifuge for separating fine powders according to claim 1, wherein The outer cylinder protrudes outward to form an annular connecting cavity, and the filter screen is disposed between the connecting cavity and the receiving cavity.

6. A centrifuge for separating fine powders according to claim 1, wherein The centrifuge for separating fine powders also includes a support base, which is fixed to the bottom of the outer cylinder.

7. A centrifuge for separating fine powders according to claim 1, wherein The centrifuge for separating fine powders also includes a motor, a drive shaft, a centrifugal disc, an air blower, and a feed pipe. The drive shaft is rotatably connected to the outer cylinder, with one end connected to the motor and the other end connected to the centrifugal disc and the air blower. The centrifugal disc is higher than the air blower, and the feed pipe is fixedly connected to the upper side of the outer cylinder.

8. A centrifuge for separating fine powders according to claim 1, wherein The exhaust pipe is connected to the air intake end of the air intake pipe.

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