A pneumatic powder automatic conveying device and its use method

Abstract

The present invention relates to the technical field of powder conveying, and discloses a pneumatic powder automatic conveying device and a method for using the same. The conveying device includes a powder conveying bin, a powder storage bin, and a discharge channel. The discharge channel is arranged between the powder conveying bin and the powder storage bin; a powder deposition elimination unit is used to eliminate the powder deposited inside the powder conveying bin to prevent the powder from depositing and agglomerating. The powder deposition elimination unit includes a conveying shaft arranged inside the powder conveying bin, and a plurality of groups of mixing blades are installed on the conveying shaft. The plurality of groups of mixing blades are provided with swing arms, and a knocking ball is installed at one end of the swing arm away from the mixing blade. The present invention drives the spiral conveying blades to rotate through the conveying shaft, and can lift the powder deposited at the bottom of the powder conveying bin upward, break the static deposition state of the powder, and promote the continuous turning of the powder. The powder is in a dynamic flow, which avoids agglomeration caused by long-term static state, gravity compaction, and the influence of environmental temperature and humidity.

Description

Technical Field

[0001] The present invention relates to the technical field of powder conveying, and more particularly to an automatic pneumatic powder conveying device and a method for using the same. Background Art

[0002] In industrial production, pneumatic powder conveyors are widely used in numerous fields, such as chemicals, food, and building materials, to transport powders from one location to another. However, powders tend to accumulate locally within the pneumatic powder conveyor channels. If residual or adhering powder within the discharge channel is not promptly discharged, it will gradually accumulate, further increasing the risk of blockage. This can also affect the quality of subsequent conveyed powders and potentially cause cross-contamination.

[0003] Specifically, the powder is prone to sedimentation at the bottom of the powder conveying silo due to its own gravity and prolonged standing. This sedimentation gradually compacts and, influenced by factors such as ambient temperature and humidity, can easily lead to lumps. This agglomerated powder not only reduces its fluidity, making it difficult to convey smoothly, but also affects its quality and performance. Furthermore, it's common for powder to adhere to the inner walls of the silo, reducing its effective volume and potentially causing fluctuations in the powder during conveying, impacting conveying stability. Summary of the Invention

[0004] The present invention provides a pneumatic powder automatic conveying device and a method for using the same, which solve the technical problems in the related art that if the residual or attached powder inside the discharge channel cannot be discharged in time, it will gradually accumulate, further exacerbating the risk of blockage, and that at the bottom of the powder conveying bin, due to the powder's own gravity and long-term static state, sedimentation is likely to occur.

[0005] The first aspect of the present invention discloses a pneumatic powder automatic conveying device, comprising a powder conveying bin, a powder storage bin and a discharge channel, wherein the discharge channel is arranged between the powder conveying bin and the powder storage bin; a powder deposition elimination unit is used to eliminate the powder deposited inside the powder conveying bin to avoid the deposition and agglomeration of the powder, and the powder deposition elimination unit comprises a conveying shaft arranged inside the powder conveying bin, and a plurality of groups of mixing blades are installed on the conveying shaft, and the plurality of groups of mixing blades are provided with a swing arm, and a knocking ball is installed at the end of the swing arm away from the mixing blade.

[0006] As a further optimization solution of the present invention, a plurality of groups of bumps are installed on the conical inner wall of the powder conveying bin, and the bumps are arranged in an annular manner with intervals.

[0007] As a further optimization scheme of the present invention, one side of the protrusion is set as an inclined surface, and the other side of the protrusion is set as a plane; when the mixing blade drives the swing arm to rotate in a circle, the swing arm rotates toward the setting direction of the inclined surface, and the swing arm contacts the inclined surface, the protrusion and the plane in turn. When the swing arm is released from contact with the protrusion, the knocking ball knocks the inner wall of the powder conveying bin.

[0008] As a further optimization scheme of the present invention, the mixing blade and the swing arm are rotatably connected via a rotating shaft, and a torsion spring is provided at the rotating shaft connection between the mixing blade and the swing arm, one end of the torsion spring is fixedly connected to the swing arm, and the other end of the torsion spring is connected to the mixing blade.

[0009] As a further optimization solution of the present invention, the striking ball is made of rubber.

[0010] As a further optimization scheme of the present invention, a spiral feeding blade is installed on the conveying shaft, and a feeding cylinder is also provided inside the powder conveying bin, and the feeding cylinder is located outside the spiral feeding blade. The upper and lower ends of the feeding cylinder are both open, and a diversion cylinder is symmetrically installed on the feeding cylinder.

[0011] As a further optimization scheme of the present invention, the powder dispersion unit includes a dispersion cylinder connected to the diversion cylinder by a bearing, and a cover plate is installed on the dispersion cylinder. Multiple groups of dispersion channels are opened on the dispersion cylinder, and the dispersion channels are evenly distributed in a ring shape on the dispersion cylinder.

[0012] As a further optimization solution of the present invention, a fan is provided inside the diverter cylinder for pneumatically dispersing the powder inside the feed cylinder.

[0013] As a further optimization solution of the present invention, the bearing on the feed cylinder is connected to a connecting disk, and a first gear is installed on the connecting disk. Both sides of the first gear are meshed and connected with second gears, and the second gear is installed on the dispersion cylinder.

[0014] The second aspect of the present invention discloses a method for using a pneumatic powder automatic conveying device, comprising the following steps:

[0015] S1, control the powder in the powder storage bin to enter the powder delivery bin through the discharge channel;

[0016] S2, controlling the synchronous rotation of the spiral conveying blades and the multiple groups of mixing blades;

[0017] The spiral conveying blades lift the powder deposited at the bottom of the powder conveying bin upwards, breaking the sedimentation state of the powder, promoting the turning of the powder, and preventing the powder from settling for a long time and agglomerating;

[0018] Multiple sets of mixing blades will scrape off the powder adhering to the inner wall, reducing the adhesion and accumulation of powder on the silo wall;

[0019] S3. During the rotation of the mixing blade, the swing arm is driven to rotate. During the rotation, the swing arm contacts the inclined surface, the protrusion and the flat surface in sequence. The swing arm swings back and forth, thereby driving the knocking ball to knock the inner wall of the powder conveying bin, so that the powder lumps attached to the bin wall fall off.

[0020] The beneficial effects of the present invention are as follows: the present invention drives the spiral feeding blades to rotate through the conveying shaft, which can lift the powder deposited at the bottom of the powder conveying bin upward, break the static sedimentation state of the powder, and promote the continuous turning of the powder. The powder is in a dynamic flow, which avoids the generation of lumps due to long-term static state, gravity compaction, and the influence of environmental temperature and humidity. In addition, the multiple groups of mixing blades rotate in contact with the inner wall of the powder conveying bin driven by the conveying shaft, which can scrape off the powder attached to the inner wall and reduce the adhesion and accumulation of powder on the bin wall. At the same time, the mixing blades are connected to the swing arm and the knocking ball through the rotating shaft, and under the interaction with the annularly distributed protrusions on the bin wall, they swing back and forth and knock on the bin wall, effectively destroying the powder lumps attached to the bin wall, causing them to fall off, and preventing the accumulation of lumps from affecting transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the powder delivery bin of the present invention;

[0023] Figure 3 This is a schematic diagram of the local structure of the present invention Figure 1 ;

[0024] Figure 4 This is a schematic diagram of the local structure of the present invention Figure 2 ;

[0025] Figure 5 The present invention Figure 2 Schematic diagram of three-dimensional cross-section structure;

[0026] Figure 6 The present invention Figure 5 A magnified view of the structure at center A;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the bump of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the powder deposition elimination unit and the powder dispersion unit of the present invention;

[0029] Figure 9 It is a schematic cross-sectional view of the powder deposition elimination unit and the powder dispersion unit of the present invention;

[0030] Figure 10 It is a schematic diagram of the partial three-dimensional structure of the powder dispersion unit of the present invention.

[0031] In the figure: 1. Powder conveying bin; 2. Powder storage bin; 3. Discharge channel; 31. Air supply pipe; 32. Nozzle; 4. Feed pipe; 5. Connecting bracket; 6. Servo motor; 7. Conveying shaft; 8. Spiral feed blade; 9. Mixing blade; 10. Swing arm; 11. Knocking ball; 12. Bump; 121. Inclined surface; 122. Flat surface; 13. Feed cylinder; 14. Diverter cylinder; 15. Dispersion cylinder; 16. Cover plate; 17. Dispersion channel; 18. Fan; 19. Connecting plate; 20. First gear; 21. Second gear; 22. Spiral blade. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0033] according to Figures 1 to 3 As shown, a pneumatic powder automatic conveying device includes a powder conveying bin 1, a powder storage bin 2 and a discharge channel 3. The powder conveying bin 1 is provided with a first feed port and a first discharge port; the powder storage bin 2 is provided with a second feed port and a second discharge port; the discharge channel 3 is arranged between the powder conveying bin 1 and the powder storage bin 2, one end of the discharge channel 3 is connected to the first feed port, and the other end of the discharge channel 3 is connected to the second discharge port.

[0034] Among them, according to Figure 4 As shown, an air supply pipe 31 is provided outside the discharge channel 3. Multiple nozzles 32 are mounted in a ring-shaped pattern on the air supply pipe 31. The nozzles 32 extend through the discharge channel 3 and into the interior of the discharge channel 3, serving to pneumatically convey the powder within the discharge channel 3 and prevent localized uneven airflow from causing material accumulation. It should be noted that the air supply pipe 31 is provided with a connection port for connecting to an external air supply device, facilitating air supply to the nozzles 32 and discharging any residual or adhering powder within the discharge channel 3.

[0035] Specifically, the air supply pipe 31 surrounding the discharge channel 3 and the nozzle 32 thereon deliver airflow into the channel from multiple angles. This effectively balances the airflow distribution within the discharge channel 3, preventing powder accumulation due to localized airflow imbalances. Furthermore, any residual or adhering powder within the discharge channel 3 is promptly discharged, preventing accumulation and reducing the risk of pipeline blockage caused by residual material, thus ensuring the continuous and stable operation of the entire conveying system.

[0036] according to Figure 1 and Figure 2 As shown, the pneumatic powder automatic conveying device also includes a conveying pipe 4 and a connecting bracket 5. The conveying pipe 4 is installed on the first discharge port; the connecting bracket 5 is installed on the powder storage bin 2 to provide stable support for the powder storage bin 2. A servo motor 6 is also installed on the first discharge port.

[0037] according to Figures 5 to 8 As shown, a powder deposition elimination unit is provided inside the powder conveying bin 1, which is used to disperse and lift the powder deposited inside the powder conveying bin 1, thereby preventing the powder from depositing and agglomerating. In this embodiment, the powder deposition elimination unit includes a conveying shaft 7 arranged inside the powder conveying bin 1, and a spiral feeding blade 8 and a plurality of mixing blades 9 are installed on the conveying shaft 7. The plurality of mixing blades 9 are rotatably connected to a swing arm 10 via a rotating shaft, and a knocking ball 11 is installed at one end of the swing arm 10 away from the mixing blade 9. The knocking ball 11 is made of rubber. A plurality of groups of protrusions 12 are installed on the conical inner wall of the powder conveying bin 1, and the protrusions 12 are arranged in a ring-shaped distribution.

[0038] It should be understood that the rotation of the spiral conveying blades 8 lifts powder deposited at the bottom of the silo upward, breaking the sedimentation state of the powder, promoting the stirring of the powder, and keeping the powder in a dynamic flow, thereby preventing it from settling for a long time and causing agglomeration. Driven by the conveying shaft 7, the multiple sets of mixing blades 9 rotate in contact with the inner wall of the powder conveying silo 1, scraping off powder adhering to the inner wall, reducing the adhesion and accumulation of powder on the silo wall, ensuring smooth conveyance of the powder within the silo, and further improving conveying efficiency.

[0039] Specifically, the bottom of the powder conveying bin 1 is arranged in a conical structure, the edges of the multiple groups of mixing blades 9 are arranged in an inclined manner, and the mixing blades 9 are in contact with the inner wall of the powder conveying bin 1.

[0040] Among them, the conveying shaft 7 is rotatably connected to the first discharge port through a bearing, and the output shaft of the servo motor 6 is fixedly connected to the conveying shaft 7; when the conveying shaft 7 is controlled to rotate, the spiral conveying blades 8 and the mixing blades 9 rotate synchronously, and the spiral conveying blades 8 can lift the powder inside the powder conveying bin 1 upward, which is convenient for turning over the deposited powder. When the conveying shaft 7 rotates, multiple groups of mixing blades 9 can contact the inner wall of the powder conveying bin 1, thereby facilitating the removal of powder attached to the inner wall of the powder conveying bin 1.

[0041] It should be noted that a torsion spring is also provided at the shaft connection between the mixing blade 9 and the swing arm 10, one end of the torsion spring is fixedly connected to the swing arm 10, and the other end of the torsion spring is connected to the mixing blade 9; when the mixing blade 9 rotates to drive the swing arm 10 to rotate, the swing arm 10 contacts the protrusion 12, and through the action of the annular spacing of the protrusion 12, the swing arm 10 swings back and forth under the cooperation of the torsion spring, thereby driving the knocking ball 11 to knock the inner wall of the powder conveying bin 1, thereby generating vibration, and vibrating the powder attached to the inner wall of the powder conveying bin 1 to separate.

[0042] What needs to be explained in detail here is that one side of the protrusion 12 is set as an inclined surface 121, and the other side of the protrusion 12 is set as a plane 122. The mixing blade 9 drives the swing arm 10 to rotate in a circle, and the direction of rotation is along the setting direction of the inclined surface 121. When the mixing blade 9 is driven to rotate, the swing arm 10 rotates synchronously, so that the swing arm 10 first contacts the inclined surface 121, and then contacts the protrusion 12, and then releases the contact with the protrusion 12 through the setting of the plane 122, so that the knocking ball 11 knocks the inner wall of the powder conveying bin 1.

[0043] In summary, when the mixing blade 9 rotates and drives the swing arm 10 to rotate, the swing arm 10 contacts the protrusion 12. Due to the design of the inclined surface 121 on one side of the protrusion 12 and the flat surface 122 on the other side, as well as the cooperation of the torsion spring between the swing arm 10 and the mixing blade 9, the swing arm 10 will produce a reciprocating swing during the rotation process, thereby driving the knocking ball 11 to rhythmically knock the inner wall of the powder conveying bin 1. The vibration generated by this knocking can effectively destroy the powder lumps attached to the bin wall, causing them to fall off, and prevent the lumps from accumulating and affecting the conveying.

[0044] In other embodiments, according to Figure 8 As shown, spiral blades 22 are installed between multiple groups of mixing blades 9; when the mixing blades 9 rotate, the spiral blades 22 are synchronously driven to rotate, thereby facilitating the turning of the powder at the conical bottom of the powder conveying bin 1, so that the powder is lifted upward to avoid deposition of the powder.

[0045] according to Figure 8 and Figure 9As shown, a feeding barrel 13 is further provided inside the powder conveying bin 1, and the feeding barrel 13 is located outside the spiral feeding blade 8. In this embodiment, the upper and lower ends of the feeding barrel 13 are both open. When the spiral feeding blade 8 rotates, the bottom of the feeding barrel 13 can feed the powder, and the top of the feeding barrel 13 can discharge the powder, thereby lifting the powder upward and preventing the powder from depositing.

[0046] The feed cylinder 13 is symmetrically provided with a diverter cylinder 14 , which is used to discharge the powder to both sides, thereby facilitating the dispersion of the powder.

[0047] according to Figures 8 to 10 As shown, a powder dispersion unit is provided on the diverter barrel 14 for dispersing the lifted powder. The powder dispersion unit includes a dispersion barrel 15 connected to the diverter barrel 14 by a bearing. A cover plate 16 is mounted on the dispersion barrel 15. The dispersion barrel 15 is provided with multiple groups of dispersion channels 17, which are evenly distributed in an annular shape on the dispersion barrel 15. In this embodiment, the powder can be discharged from the dispersion channels 17. The dispersion of the powder by the dispersion channels 17 ensures a uniform distribution of the powder and disperses the powder at different angles for discharge, further refining the dispersion effect of the powder.

[0048] A fan 18 is provided inside the diverter cylinder 14 for pneumatically dispersing the powder inside the feeding cylinder 13 .

[0049] according to Figure 10 As shown, the bearing on the feeding cylinder 13 is connected to a connecting disk 19 , and a first gear 20 is installed on the connecting disk 19 . Both sides of the first gear 20 are meshed with second gears 21 , and the second gear 21 is installed on the dispersion cylinder 15 .

[0050] It should be noted that the connecting disk 19 is fixedly connected to the conveying shaft 7; when the conveying shaft 7 is driven to rotate, the first gear 20 is synchronously driven to rotate, and the first gear 20 and the second gear 21 are engaged and connected, and the dispersion cylinder 15 rotates to disperse and discharge the powder.

[0051] In summary, the dispersion drum 15 is connected to the diverter drum 14 via bearings. When the conveying shaft 7 rotates, the transmission of the connecting plate 19, the first gear 20, and the second gear 21 drives the dispersion drum 15 to rotate. The multiple groups of dispersion channels 17 evenly distributed in an annular shape on the dispersion drum 15 disperse and discharge the powder at different angles as the dispersion drum 15 rotates, further refining the powder dispersion effect and significantly improving the powder uniformity. At the same time, the fan 18 inside the diverter drum 14 pneumatically disperses the powder inside the feed drum 13, cooperating with the mechanical dispersion method to achieve efficient powder dispersion from multiple dimensions.

[0052] according to Figures 1-10As shown, a method for using a pneumatic powder automatic conveying device includes the following steps:

[0053] S1, controlling the powder in the powder storage bin 2 to enter the powder delivery bin 1 through the discharge channel 3;

[0054] S2, controlling the spiral conveying blades 8 and the multiple groups of mixing blades 9 to rotate synchronously;

[0055] The spiral conveying blades 8 lift the powder deposited at the bottom of the powder conveying bin 1 upwards, breaking the sedimentation state of the powder, promoting the turning of the powder, and preventing the powder from settling for a long time and agglomerating;

[0056] Multiple groups of mixing blades 9 will scrape off the powder attached to the inner wall, reducing the adhesion and accumulation of powder on the silo wall;

[0057] S3. During the rotation of the mixing blade 9, the swing arm 10 is driven to rotate. During the rotation, the swing arm 10 contacts the inclined surface 121, the protrusion 12 and the plane 122 in sequence. The swing arm 10 swings back and forth, thereby driving the knocking ball 11 to knock the inner wall of the powder conveying bin 1, so that the powder lumps attached to the bin wall fall off.

[0058] The above describes an embodiment of this specific implementation method, but this embodiment is not limited to the above specific implementation method. The above specific implementation method is merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A method for automatically conveying pneumatic powder materials, using an automatic pneumatic powder material conveying device, the automatic pneumatic powder material conveying device comprising: A powder material conveying bin (1), a powder material storage bin (2) and a discharge channel (3), wherein the discharge channel (3) is arranged between the powder material conveying bin (1) and the powder material storage bin (2); A powder deposition elimination unit is used to eliminate powder deposited inside a powder delivery bin (1) to prevent the powder from depositing and agglomerating. The powder deposition elimination unit comprises a delivery shaft (7) disposed inside the powder delivery bin (1), and a plurality of groups of mixing blades (9) are mounted on the delivery shaft (7). The plurality of groups of mixing blades (9) are provided with swing arms (10), and a striking ball (11) is mounted on one end of the swing arm (10) away from the mixing blades (9); A plurality of groups of protrusions (12) are installed on the conical inner wall of the powder delivery bin (1), and the protrusions (12) are arranged in an annular manner and spaced apart; One side of the protrusion (12) is set as an inclined surface (121), and the other side of the protrusion (12) is set as a flat surface (122); when the mixing blade (9) drives the swing arm (10) to rotate in a circular motion, the swing arm (10) rotates in the direction in which the inclined surface (121) is set, and the swing arm (10) sequentially contacts the inclined surface (121), the protrusion (12), and the flat surface (122); when the swing arm (10) is released from contact with the protrusion (12), the knocking ball (11) knocks the inner wall of the powder conveying bin (1); The mixing blade (9) and the swing arm (10) are rotatably connected via a rotating shaft. A torsion spring is provided at the connection between the mixing blade (9) and the swing arm (10). One end of the torsion spring is fixedly connected to the swing arm (10), and the other end of the torsion spring is connected to the mixing blade (9). It is characterized in that the pneumatic powder automatic conveying method comprises the following steps: S1, controlling the powder in the powder storage bin (2) to enter the powder conveying bin (1) through the discharge channel (3); S2, controlling the spiral conveying blades (8) and the plurality of mixing blades (9) to rotate synchronously; The spiral conveying blades (8) lift the powder deposited at the bottom of the powder conveying bin (1) upwards, breaking the sedimentation state of the powder, promoting the turning of the powder, and preventing the powder from settling for a long time and agglomerating; Multiple groups of mixing blades (9) scrape off the powder adhering to the inner wall, reducing the adhesion and accumulation of powder on the silo wall; S3. During the rotation of the mixing blade (9), the swing arm (10) is driven to rotate. During the rotation, the swing arm (10) sequentially contacts the inclined surface (121), the protrusion (12), and the plane (122). The swing arm (10) swings back and forth, thereby driving the knocking ball (11) to knock the inner wall of the powder conveying bin (1), so that the powder lumps attached to the bin wall fall off.

2. The method for automatic pneumatic powder conveying according to claim 1, characterized in that: The striking ball (11) is made of rubber.

3. The pneumatic powder automatic conveying method according to claim 1, characterized in that: A spiral feeding blade (8) is installed on the conveying shaft (7), and a feeding cylinder (13) is further provided inside the powder conveying bin (1). The feeding cylinder (13) is located outside the spiral feeding blade (8), and the upper and lower ends of the feeding cylinder (13) are both open. A diverter cylinder (14) is symmetrically installed on the feeding cylinder (13), and a powder dispersion unit is provided on the diverter cylinder (14).

4. The automatic pneumatic powder conveying method according to claim 3, characterized in that: A powder dispersion unit comprises a dispersion cylinder (15) connected to the diversion cylinder (14) by a bearing, a cover plate (16) being installed on the dispersion cylinder (15), a plurality of dispersion channels (17) being provided on the dispersion cylinder (15), and the dispersion channels (17) being evenly distributed in an annular shape on the dispersion cylinder (15).

5. The automatic pneumatic powder conveying method according to claim 4, characterized in that: A fan (18) is provided inside the diversion cylinder (14) for pneumatically dispersing the powder inside the feeding cylinder (13).

6. The method for automatic pneumatic powder conveying according to claim 4, characterized in that: The bearing on the feeding cylinder (13) is connected to a connecting disk (19), and a first gear (20) is installed on the connecting disk (19). Both sides of the first gear (20) are meshed and connected with second gears (21), and the second gear (21) is installed on the dispersion cylinder (15).

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