Efficient powder selecting equipment

Abstract

The invention discloses efficient powder selecting equipment which comprises a support, a cyclone powder selecting machine, a cyclone unloader and a pulse dust collector, a feeding hopper is fixedly arranged on one side of the top of the support, a pulverizer is arranged on the other side of the top of the feeding hopper, and a conveying belt is arranged between a discharging opening in the bottom of the feeding hopper and a feeding opening in the upper portion of the pulverizer. A first auger feeder is arranged between a discharging port in the lower portion of the pulverizer and the cyclone powder concentrator, a slag outlet in the lower portion of the cyclone discharger is connected with a third auger feeder, a second auger feeder is arranged between the lower portion of the cyclone powder concentrator and a feeding port in the top of the pulverizer, and a negative pressure fan is fixedly arranged on one side of the top of the support. The device can be conveniently unfolded and cleaned, the maintenance and cleaning difficulty of the device is reduced, sufficient cleaning can be carried out after powder selection is finished, material pollution caused by different powder selection operations is avoided, and material waste is reduced.

Description

Technical Field

[0001] This invention relates to the field of air classifier technology, and in particular to a high-efficiency air classifier. Background Technology

[0002] Air classifiers can be divided into three main categories: three-stage separation air classifiers, centrifugal air classifiers, and cyclone air classifiers. Air classifiers are generally used for ultra-fine classification of materials that cannot be classified on ordinary sorting equipment. They are especially suitable for processing products that have strict limits on the maximum particle size and require a narrow particle size distribution, such as heavy calcium carbonate, kaolin, talc powder, barite powder, coatings, mica, graphite, growth hormones, aluminum hydroxide, etc. Existing air classifiers still have room for improvement in separation efficiency, and the separation efficiency is limited, which puts a lot of pressure on the downstream pulse dust collector. Therefore, a high-efficiency air classifier is proposed first. Summary of the Invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a high-efficiency powder selection device.

[0004] The present invention proposes a high-efficiency powder classifier, including a support frame, a feeding hopper fixedly installed on one side of the top of the support frame, a crusher installed on the other side of the top of the feeding hopper, and a conveyor belt installed between the bottom discharge port of the feeding hopper and the upper feed port of the crusher. It also includes a cyclone classifier, a cyclone unloader, and a pulse dust collector. A first auger feeder is installed between the lower discharge port of the crusher and the cyclone classifier. A third auger feeder is connected to the lower slag discharge port of the cyclone unloader. A second auger feeder is installed between the lower part of the cyclone classifier and the top feed port of the crusher. A negative pressure fan is fixedly installed on one side of the top of the support. A dust removal duct is installed between the air outlet of the cyclone unloader and the air inlet of the negative pressure fan. An air outlet is installed at the top of the cyclone classifier. A second suction pipe is connected between the air outlet and the air inlet of the cyclone unloader. Preferably, a dust removal duct is connected between the air inlet of the pulse dust collector and the air outlet of the negative pressure fan.

[0005] Preferably, the cyclone classifier includes an upper cylinder cover with a lower opening and a lower cone. The top of the lower cone is fixedly connected to the bottom of the upper cylinder cover. A feeding channel is provided on the top side wall of the upper cylinder cover along its tangential direction. An air inlet pipe is provided at one end of the feeding channel. The air inlet pipe is connected to a feeding air pipe, and the feeding air pipe is connected to the top feed port of the crusher. A feeding pipe is provided at the top of the feeding channel. The feeding pipe is connected to the discharge port of the first auger feeder. The air outlet is located at the middle of the top of the upper cylinder cover.

[0006] Preferably, the upper cylindrical cover has an inverted conical cover inside, the lower part of which is cylindrical. Connecting blocks, evenly spaced in a ring, are arranged on the outer circumference of the lower part of the inverted conical cover. These connecting blocks are fixedly connected to the inner wall of the upper cylindrical cover. The top of the inverted conical cover communicates with the air outlet. A horizontally arranged mounting bracket is provided inside the inverted conical cover. A right-angle gear commutator is fixedly mounted at the middle of the mounting bracket. One of the shafts of the right-angle gear commutator is fixedly connected to a connecting shaft. The connecting shaft is arranged along the radial direction of the upper cylindrical cover, and the end of the connecting shaft away from the right-angle gear commutator passes through the inverted conical cover. The cover and the upper cylindrical cover are fixedly connected by a second pulley. A motor bracket is fixed to the side wall of the upper cylindrical cover. The motor bracket has an L-shaped structure. A drive motor is fixedly mounted on the motor bracket. A first pulley is fixedly mounted on the output shaft of the drive motor. A common transmission belt is provided between the first pulley and the second pulley. The other shaft of the right-angle gear commutator is coaxially arranged with the upper cylindrical cover. An impeller disk is fixedly mounted on the shaft of the right-angle gear commutator that is coaxial with the upper cylindrical cover. Multiple blades are radially distributed on the outer side of the impeller disk. A gap is left between the end of the blade away from the impeller disk and the inner wall of the inverted cone cover.

[0007] Preferably, the lower cone includes two symmetrically arranged semi-conical covers. Each of the two semi-conical covers has a perforated inner cover on its inner side. A cavity is formed between the perforated inner cover and the inner side of the semi-conical cover. An air return vent, connected to the inner cavity, is provided on the outer side of each semi-conical cover. A semi-circular tube is provided at the lower end of each semi-conical cover. Connecting strips are provided on two sides of each semi-conical cover. Connecting strips on the same side of the two semi-conical covers are connected by hinges. Multiple fixing holes are provided on the connecting strips, and the two semi-conical covers are fixedly connected by bolts through the fixing holes on the connecting strips. A flexible sleeve is fitted onto the semi-circular tube, and the flexible sleeve is inserted into the feed inlet of the second auger feeder.

[0008] Preferably, a cleaning cylinder is coaxially arranged at the lower part of the impeller disk, and the outer circumferential surface of the cleaning cylinder is provided with connecting strips distributed at equal intervals, and the connecting strips are provided with steel wire bristles, the length of which is adapted to the inner wall of the lower cone.

[0009] Preferably, the return air inlets on both of the semi-conical hoods are connected to return air branch pipes, and the two return air branch pipes are flexible pipes, with the ends of the two return air branch pipes away from the cyclone classifier connected to the dust removal duct.

[0010] Preferably, the oil inlet of the right-angle gear commutator is connected to an oil injection pipe, and the end of the oil injection pipe away from the right-angle gear commutator extends out through an inverted cone cover and an upper cylindrical cover.

[0011] In summary, the beneficial effects of this invention are as follows: The split-type lower cone structure facilitates easy unfolding and cleaning, reducing the difficulty of equipment maintenance and cleaning. Thorough cleaning can be performed after powder selection, preventing material contamination during different powder selection operations. The included return air inlet, along with the return air branch pipe, can draw back some powder from the pipeline leading to the pulse dust collector, reducing material waste. The drive motor, in conjunction with a right-angle gear commutator, drives the impeller to rotate, generating an upward airflow to improve powder selection efficiency. The cleaning cylinder, with its steel wire brush, cleans the inner wall of the lower cone in real time during equipment operation, preventing clogging of the porous inner cover's mesh. The feed duct at the conveyor belt inlet effectively reduces dust, minimizing environmental pollution. The rotating cleaning cylinder and steel wire brush disperse and agitate the material, accelerating the separation of powder and large-particle materials. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a high-efficiency powder classifier proposed in this invention; Figure 2 This is a schematic diagram of the structure of the pulverizer and cyclone classifier of the present invention; Figure 3 This is an exploded structural diagram of the cyclone classifier of the present invention; Figure 4 This is a schematic diagram of the structure of the semi-conical cover of the present invention; Figure 5 This is a schematic diagram of the exploded structure inside the upper cylindrical cover of the present invention; Figure 6 This is a schematic diagram of the dust removal duct and negative pressure fan of the present invention.

[0013] In the diagram: 1. Feeding hopper; 10. First auger feeder; 11. Second auger feeder; 12. Cyclone unloader; 13. Feed duct; 14. Pulse dust collector; 15. Second suction duct; 2. Support frame; 3. Conveyor belt; 4. Negative pressure fan; 5. Crusher; 6. Dust removal duct; 601. Return air branch pipe; 7. First suction duct; 8. Cyclone classifier; 801. Upper cylinder cover; 8011. Feeding channel; 8012. Inlet duct; 8013. Feeding pipe; 8014. Air outlet; 802. Lower cone; 8021. Return air outlet; 8022. Half 8023. Circular tube section; 8024. Flexible sleeve; 8025. Semi-conical cover; 8026. Perforated inner cover; 8027. Connecting strip; 803. Inverted conical cover; 8031. Connecting block; 8032. Mounting bracket; 804. Motor bracket; 805. Drive motor; 8054. First pulley; 806. Cleaning cylinder; 8061. Steel wire brush bristles; 807. Right angle gear reversing device; 8071. Connecting shaft; 8072. Second pulley; 8073. Transmission belt; 8074. Oil injection pipe; 808. Impeller disc; 8081. Blade; 9. Third auger feeder. Detailed Implementation

[0014] The following will refer to the appendices in the embodiments of the present invention. Figures 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0015] Reference Figure 1-6 A high-efficiency powder classifier includes a support frame 2, a feeding hopper 1 fixedly installed on one side of the top of the support frame 2, a crusher 5 installed on the other side of the top of the feeding hopper 1, and a conveyor belt 3 installed between the bottom discharge port of the feeding hopper 1 and the upper feed port of the crusher 5. The present invention also includes a cyclone classifier 8, a cyclone unloader 12, and a pulse dust collector 14. A first auger feeder 10 is provided between the lower discharge port of the crusher 5 and the cyclone classifier 8. A third auger feeder 9 is connected to the lower slag discharge port of the cyclone unloader 12. A second auger feeder 11 is provided between the lower part of the cyclone classifier 8 and the top feed port of the crusher 5. A negative pressure fan 4 is fixedly provided on one side of the top of the support 2. A dust removal duct 6 is provided between the air outlet of the cyclone unloader 12 and the air inlet of the negative pressure fan 4. An air outlet 8014 is provided at the top of the cyclone classifier 8. A second suction pipe 15 is connected between the air outlet 8014 and the air inlet of the cyclone unloader 12. In this invention, a dust removal duct 6 is connected between the air inlet of the pulse dust collector 14 and the air outlet of the negative pressure fan 4.

[0016] In this invention, the cyclone classifier 8 includes an upper cylinder cover 801 with an opening at the bottom and a lower cone 802. The top of the lower cone 802 is fixedly connected to the bottom of the upper cylinder cover 801. The top side wall of the upper cylinder cover 801 is provided with a feeding channel 8011 along its tangential direction. One end of the feeding channel 8011 is provided with an air inlet pipe 8012. The air inlet pipe 8012 is connected to a feeding air pipe 13, and the feeding air pipe 13 is connected to the top feed port of the crusher 5. The top of the feeding channel 8011 is provided with a feeding pipe 8013, which is connected to the discharge port of the first auger feeder 10. The air outlet 8014 is located at the middle position of the top of the upper cylinder cover 801.

[0017] In this invention, an inverted cone cover 803 is provided inside the upper cylindrical cover 801. The lower part of the inverted cone cover 803 has a cylindrical structure. Connecting blocks 8031, evenly spaced and arranged in a ring, are provided at the outer circumference of the lower part of the inverted cone cover 803. The connecting blocks 8031 ​​are fixedly connected to the inner wall of the upper cylindrical cover 801. The top of the inverted cone cover 803 is connected to the air outlet 8014. A horizontally arranged mounting bracket 8032 is provided inside the inverted cone cover 803. A right-angle gear commutator 807 is fixedly installed at the middle position of the mounting bracket 8032. One of the shafts of the right-angle gear commutator 807 is fixedly connected to a connecting shaft 8071. The connecting shaft 8071 is arranged along the radial direction of the upper cylindrical cover 801, and the end of the connecting shaft 8071 away from the right-angle gear commutator 807 passes through the inverted cone cover 803 and... The upper cylindrical cover 801 is fixedly connected to a second pulley 8072. A motor bracket 804 is fixed to the side wall of the upper cylindrical cover 801. The motor bracket 804 has an L-shaped structure. A drive motor 805 is fixedly mounted on the motor bracket 804. A first pulley 8054 is fixedly mounted on the output shaft of the drive motor 805. The same transmission belt 8073 is provided between the first pulley 8054 and the second pulley 8072. Another rotating shaft of the right-angle gear commutator 807 is coaxially mounted with the upper cylindrical cover 801. An impeller disk 808 is fixedly mounted on the rotating shaft of the right-angle gear commutator 807 coaxial with the upper cylindrical cover 801. Multiple blades 8081 are radially distributed on the outer side of the impeller disk 808. The end of the blade 8081 away from the impeller disk 808 leaves a gap with the inner wall of the inverted cone cover 803.

[0018] In this invention, the lower cone 802 includes two symmetrically arranged semi-conical covers 8024. Each of the two semi-conical covers 8024 has a perforated inner cover 8025 on its inner side. The perforated inner cover 8025 and the inner side of the semi-conical cover 8024 have cavities. The outer side of the semi-conical cover 8024 has a return air inlet 8021 connected to the inner cavity. The lower end of the semi-conical cover 8024 has a semi-circular tube portion 8022. Two sides of the semi-conical cover 8024 have connecting strips 8026. The connecting strips 8026 on the same side of the two semi-conical covers 8024 are connected by hinges. The connecting strips 8026 have multiple fixing holes, and the two semi-conical covers 8024 are fixedly connected by bolts through the fixing holes on the connecting strips 8026. A flexible sleeve 8023 is fitted onto the semi-circular tube portion 8022, and the flexible sleeve 8023 is inserted into the feed inlet of the second auger feeder 11.

[0019] In this invention, a cleaning cylinder 806 is coaxially arranged at the lower part of the impeller disk 808. The outer circumferential surface of the cleaning cylinder 806 is provided with connecting strips that are evenly distributed, and steel wire bristles 8061 are provided on the connecting strips. The length of the steel wire bristles 8061 is adapted to the inner wall of the lower cone cylinder 802.

[0020] In this invention, the return air inlets 8021 on the two semi-cone hoods 8024 are all connected to return air branch pipes 601, and the two return air branch pipes 601 are flexible pipes. The end of the two return air branch pipes 601 away from the cyclone classifier 8 is connected to the dust removal duct 6.

[0021] In this invention, the oil inlet of the right-angle gear commutator 807 is connected to an oil inlet pipe 8074, and the end of the oil inlet pipe 8074 away from the right-angle gear commutator 807 passes through the inverted cone cover 803 and the upper cylinder cover 801.

[0022] Working Principle: During operation, material first enters the feeding hopper 1 and is conveyed to the crusher 5 via the conveyor belt 3. The crusher 5 crushes the material. A negative pressure fan 4 provides negative pressure to the entire equipment. Under the influence of airflow, dust raised at the inlet of the crusher 5 is sucked into the cyclone separator 8 by the feed duct 13. Simultaneously, material from the lower part of the crusher 5 enters the cyclone separator 8 through the first auger feeder 10. The material in the cyclone separator 8 spirals down along the inner wall of the upper cylinder shroud 801. Larger particles are separated by gravity and reach the bottom of the lower cone 802, then return to the crusher 5 via the second auger feeder 11 for further crushing. The outlet 8014 at the top of the cyclone separator 8 connects to the cyclone discharger 12, where the separated fine powder is discharged. The material is separated from the airflow in the device 12 and collected at the lower part of the cyclone unloader 12. It is then discharged through the third auger feeder 9. The outlet of the negative pressure fan 4 is connected to the pulse dust collector 14 through the dust removal duct 6. The return air branch pipe 601 can suck some residual powder in the dust removal duct 6 back to the cyclone classifier 8. The drive motor 805 on the cyclone classifier 8 works, driving the right angle gear reversing device 807 to work, driving the impeller 808 to rotate. The blades 8081 drive the airflow to rise, promoting the separation of powder and large-diameter materials. The cleaning cylinder 806, together with the wire brush 8061, can clean the porous inner cover 8025 to avoid blockage. The large-diameter material collected in the lower cone 802 is returned to the crusher 5 for further crushing through the second auger feeder 11.

[0023] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency powder classifier, characterized in that: The system includes a support frame (2), a feeding hopper (1) fixedly installed on one side of the top of the support frame (2), a crusher (5) installed on the other side of the top of the feeding hopper (1), and a conveyor belt (3) installed between the bottom discharge port of the feeding hopper (1) and the upper feed port of the crusher (5); it also includes a cyclone separator (8), a cyclone unloader (12) and a pulse dust collector (14), a first auger feeder (10) installed between the lower discharge port of the crusher (5) and the cyclone separator (8), and a third auger feeder (9) connected to the lower slag discharge port of the cyclone unloader (12). A second auger feeder (11) is provided between the lower part of (8) and the top feed inlet of the crusher (5). A negative pressure fan (4) is fixedly provided on one side of the top of the bracket (2). A dust removal duct (6) is provided between the air outlet of the cyclone unloader (12) and the air inlet of the negative pressure fan (4). An air outlet (8014) is provided at the top of the cyclone classifier (8). A second suction pipe (15) is connected between the air outlet (8014) and the air inlet of the cyclone unloader (12). A dust removal duct (6) is connected between the air inlet of the pulse dust collector (14) and the air outlet of the negative pressure fan (4).

2. The high-efficiency powder classifier according to claim 1, characterized in that: The cyclone classifier (8) includes an upper cylinder cover (801) with an opening at the bottom and a lower cone (802). The top of the lower cone (802) is fixedly connected to the bottom of the upper cylinder cover (801). The upper cylinder cover (801) has a feeding channel (8011) on its top side wall along its tangent direction. One end of the feeding channel (8011) is provided with an air inlet pipe (8012). The air inlet pipe (8012) is connected to a feeding air pipe (13), and the feeding air pipe (13) is connected to the top feed port of the crusher (5). The top of the feeding channel (8011) is provided with a feeding pipe (8013), and the feeding pipe (8013) is connected to the discharge port of the first auger feeder (10). The air outlet (8014) is located at the top middle position of the upper cylinder cover (801).

3. The high-efficiency powder classifier according to claim 1, characterized in that: The upper cylindrical cover (801) is internally provided with an inverted cone cover (803). The lower part of the inverted cone cover (803) has a cylindrical structure. Connecting blocks (8031) are evenly spaced and arranged in a ring around the lower outer circumference of the inverted cone cover (803). The connecting blocks (8031) are fixedly connected to the inner wall of the upper cylindrical cover (801). The top of the inverted cone cover (803) is connected to the air outlet (8014). The interior of the inverted cone cover (803) is provided with... A horizontally arranged mounting bracket (8032) has a right-angle gear commutator (807) fixedly mounted at its middle position. One of the shafts of the right-angle gear commutator (807) is fixedly connected to a connecting shaft (8071). The connecting shaft (8071) is arranged along the radial direction of the upper cylindrical cover (801), and the end of the connecting shaft (8071) away from the right-angle gear commutator (807) passes through the inverted cone cover (803) and the upper cylindrical cover (801) and is fixedly connected to a second pulley (8072). A motor bracket (804) is fixedly mounted on the side wall of the upper cylindrical cover (801). The motor bracket (804) has an L-shaped structure, and a drive motor (805) is fixedly mounted on the motor bracket (804). A first pulley (8054) is fixedly mounted on the output shaft of the drive motor (805). A common transmission is provided between the first pulley (8054) and the second pulley (8072). The other shaft of the right-angle gear commutator (807) is coaxially arranged with the upper cylinder cover (801). An impeller disk (808) is fixedly arranged on the shaft of the right-angle gear commutator (807) and the upper cylinder cover (801). Multiple blades (8081) are radially distributed on the outer side of the impeller disk (808). The end of the blade (8081) away from the impeller disk (808) leaves a gap with the inner wall of the inverted cone cover (803).

4. The high-efficiency powder classifier according to claim 1, characterized in that: The lower cone (802) includes two symmetrically arranged semi-conical covers (8024). Each of the two semi-conical covers (8024) has a perforated inner cover (8025) on its inner side. The perforated inner cover (8025) and the inner side of the semi-conical cover (8024) have cavities. The outer side of each semi-conical cover (8024) has a return air inlet (8021) connected to the internal cavity. The lower end of each semi-conical cover (8024) has a semi-circular tube section (8022). One of the semi-conical covers (8024)... Connecting strips (8026) are provided on both sides. The connecting strips (8026) on the same side of the two semi-conical covers (8024) are connected by hinges. Multiple fixing holes are provided on the connecting strips (8026). The two semi-conical covers (8024) are fixedly connected by bolts through the fixing holes on the connecting strips (8026). A flexible sleeve (8023) is fitted on the semi-circular tube part (8022). The flexible sleeve (8023) is inserted into the feed port of the second auger feeder (11).

5. The high-efficiency powder classifier according to claim 1, characterized in that: A cleaning cylinder (806) is coaxially arranged at the lower part of the impeller disk (808). The outer circumferential surface of the cleaning cylinder (806) is provided with connecting strips that are evenly distributed, and steel wire bristles (8061) are provided on the connecting strips. The length of the steel wire bristles (8061) is adapted to the inner wall of the lower cone (802).

6. The high-efficiency powder classifier according to claim 1, characterized in that: The return air inlets (8021) on the two semi-cone hoods (8024) are connected to return air branch pipes (601), and the two return air branch pipes (601) are flexible pipes. The two return air branch pipes (601) are connected to the dust removal air duct (6) at the end away from the cyclone classifier (8).

7. The high-efficiency powder classifier according to claim 1, characterized in that: The oil inlet of the right-angle gear commutator (807) is connected to an oil inlet pipe (8074), and the end of the oil inlet pipe (8074) away from the right-angle gear commutator (807) is passed through an inverted cone cover (803) and an upper cylinder cover (801).

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