A powder conveying device capable of uniformly dispersing materials

Abstract

This invention discloses a powder conveying device capable of uniformly dispersing materials, belonging to the technical field of powder conveying devices. It includes a mounting bracket, with a powder storage silo fixedly connected inside. The powder storage silo has an inlet at the top and an outlet at the bottom. It also includes a stirring mechanism housed within the powder storage silo, which is adjustable vertically. A mounting plate is fixedly connected inside the mounting bracket. This invention achieves dual-mode switching between pre-dispersion (storage and pre-dispersion) and dispersion (discharge) through a lifting stirring rod linked to a stopper for material discharge. Hot air circulation heating combined with stirring enhances the pre-dispersion effect, while fresh air blowing combined with a dispersion plate achieves uniform dispersion. A rotating ring linked to a striking rod vibrates to prevent adhesion, and fan blades assist flow to ensure smooth material discharge. The entire structure integrates heating, stirring, mode switching, and uniform dispersion, significantly improving powder conveying efficiency and production quality.

Description

Technical Field

[0001] This invention belongs to the technical field of powder conveying devices, and in particular relates to a powder conveying device that can uniformly disperse materials. Background Technology

[0002] In paperboard production, especially corrugated paperboard, adhesives are used to bond the linerboard, faceboard, and other layers. The most commonly used adhesive is starch-based adhesive, whose main raw material is starch (such as corn or tapioca starch), supplemented with caustic soda, borax, and water. In some high-strength or special applications, synthetic resin adhesives such as PVA and polyurethane are also used. Among these, corn starch is the most commonly used due to its moderate gelatinization temperature (about 77°C) and high amylopectin content.

[0003] However, corn starch is highly hygroscopic, and during storage, it is prone to clumping and bridging due to moisture absorption, compression, or prolonged static placement. This leads to poor discharge and blockage of conveying pipelines, severely impacting production efficiency and product quality. Therefore, the industry typically uses agitation devices to disperse the powdered starch in storage silos and then uses a pneumatic conveying system to transport the starch. However, existing powder conveying devices mainly suffer from the following technical problems:

[0004] 1. Mechanical stirring alone is not enough to effectively break up clumps. Although some technologies add heating devices in the storage silo, the heat cannot be evenly distributed, resulting in the heat not being able to penetrate the powder layer evenly, resulting in low heating efficiency and poor effect. In addition, the heating system and the stirring mechanism are independent of each other, resulting in a bulky structure.

[0005] 2. When powder is discharged from the storage silo into the conveying pipeline, it often falls in an agglomerated state, lacking effective means of dispersing, which can easily lead to accumulation at the pipeline inlet or cause uneven load on subsequent pneumatic conveying.

[0006] Therefore, it is necessary to propose a powder conveying device that can uniformly disperse materials to solve the problems mentioned above. Summary of the Invention

[0007] In view of this, in order to solve the problems of low equipment integration, lack of effective and uniform heating and dispersing function, and poor powder aggregation and dispersion effect in existing powder conveying devices, the present invention provides a powder conveying device that can uniformly disperse materials.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a powder conveying device capable of uniformly dispersing materials, comprising a mounting bracket, a powder storage silo fixedly connected inside the mounting bracket, an inlet at the top of the powder storage silo, and an outlet at the bottom of the powder storage silo, and further comprising:

[0009] A stirring mechanism is provided inside the powder storage hopper for stirring the powder. The stirring mechanism can be adjusted up and down.

[0010] The mounting plate is fixedly connected inside the mounting bracket. The bottom of the powder storage silo is in sealed contact with the top of the mounting plate. The top of the mounting plate is provided with a discharge hole that corresponds to and communicates with the discharge port.

[0011] A feeding bin is fixedly connected to the bottom of the mounting plate. The feeding hole communicates with the interior of the feeding bin, and the bottom of the feeding bin is provided with a feeding port.

[0012] A powder dispersion component is located inside the feeding hopper and is fixedly connected to the bottom of the mounting plate for dispersing and conveying powder.

[0013] A vertical tube is vertically connected and rotates through the powder dispersion assembly. The top end of the vertical tube extends upward into the stirring mechanism. The stirring mechanism has an air guide channel that works in conjunction with the vertical tube.

[0014] A fixed plate is fixedly connected to one side of the mounting bracket. A hot air conveying mechanism is installed on the top of the fixed plate. The hot air conveying mechanism is connected to the vertical pipe and the powder dispersion component through pipes, which can convey hot air from the vertical pipe through the air guide channel to the inside of the mixing mechanism to complete the heating and mixing of the powder.

[0015] By adjusting the up and down of the mixing mechanism, it is possible to switch between two modes: hot air circulation and fresh air conveying. When in the hot air circulation mode, the powder is in a storage state, and the mixing mechanism heats and mixes the powder through hot air circulation to complete the pre-dispersion. When switching to the fresh air conveying mode, the powder is automatically switched to the feeding state, and fresh air from the outside is conveyed into the feeding hopper, which, together with the powder dispersing component, realizes the automatic dispersing and conveying of the powder.

[0016] Furthermore, the stirring mechanism includes a first rotating sleeve that is sealed and rotatably connected to the top of the mounting bracket. An stirring rod is axially slidably inserted inside the first rotating sleeve. The stirring rod is provided with multiple sets of stirring blades axially on the outer wall inside the powder storage silo.

[0017] Furthermore, an L-shaped plate is fixedly connected to the top outer wall of the powder storage silo, the top end of the stirring rod is rotatably connected to the bottom of the L-shaped plate, a hydraulic cylinder is fixedly installed on the top outer wall of the powder storage silo, the output end of the hydraulic cylinder faces upward and is fixedly connected to the bottom of the L-shaped plate, a drive motor is fixedly installed on the top of the L-shaped plate, and the output shaft of the drive motor rotates downward through the top of the L-shaped plate and is fixedly connected to the top end of the stirring rod.

[0018] Furthermore, the bottom end of the stirring rod passes through the discharge hole from the outlet downwards. The outer diameter of the stirring rod is smaller than the inner diameter of the outlet and the discharge hole. A plug located below the discharge hole and used in conjunction with the stirring rod is fixedly sleeved on the outer wall of the stirring rod.

[0019] Furthermore, the powder dispersion assembly includes a fixed disk fixedly connected inside the feeding hopper, a circular shell fixedly connected to the bottom of the fixed disk, a second rotating sleeve passing through the top of the fixed disk in a sealed rotatable manner, and the bottom end of the stirring rod sliding downward through the second rotating sleeve and extending into the internal space of the circular shell.

[0020] Furthermore, the vertical tube is vertically sealed and rotates through the bottom of the circular shell. The air guide channel includes an upper cavity located above the stirring rod and a lower cavity located at the bottom. The top end of the vertical tube extends from the lower cavity into the upper cavity. The outer diameter of the vertical tube is smaller than the inner diameter of the lower cavity. Multiple air guide pipes are circumferentially fixed to the outer wall of the stirring rod. The top end of the air guide pipe is connected to the upper interior of the upper cavity, and the bottom end of the air guide pipe is connected to the upper interior of the lower cavity.

[0021] Furthermore, the hot air conveying mechanism includes a hot air blower fixedly installed on the top of the fixed plate. The air inlet end of the hot air blower is connected to an air conveying pipe. The other end of the air conveying pipe is sealed and passes through one side of the feeding hopper and is fixedly connected to the bottom of the circular shell. The air outlet end of the hot air blower is connected to an air outlet pipe. The bottom end of the vertical pipe is sealed and rotatably connected to an air guide seat. The air guide seat has an air guide cavity inside. The other end of the air outlet pipe is sealed and passes through one side of the feeding hopper and is fixedly connected to one side of the air guide seat.

[0022] Furthermore, the outer wall of the air guide seat is fixedly connected with a plurality of first connecting rods, and the ends of the plurality of first connecting rods away from the air guide seat are all fixedly connected to the inner wall of the feeding hopper.

[0023] Furthermore, an air inlet pipe is fixedly inserted through one side of the circular shell, and the other end of the air inlet pipe is sealed through one side of the feeding hopper and extends outward. The stirring rod is located inside the outer wall of the circular shell and is fixedly connected to multiple second connecting rods at equal intervals around the circumference. The other end of the multiple second connecting rods is fixedly connected to the same rotating ring that rotates in contact with the inner wall of the circular shell. When the top of the rotating ring abuts against the bottom of the fixed plate, it seals one end of the air inlet pipe.

[0024] Furthermore, the outer wall of the stirring rod is provided with a plurality of air outlet holes that are connected to the lower cavity at equal intervals around the circumference, and the outer wall of the second rotating sleeve is provided with a plurality of through holes located above the fixed plate at equal intervals around the circumference, and the plurality of through holes are respectively matched with the plurality of air outlet holes one by one.

[0025] Furthermore, the top edge of the fixed disk is circumferentially fixed with a number of dispersion pieces. The horizontal cross-section of the dispersion pieces is triangular, and one corner of the dispersion piece is set towards the center of the fixed disk. The tops of the multiple dispersion pieces are fixedly connected to the same fixing ring, and the fixing ring is fixedly installed on the bottom of the mounting plate.

[0026] Furthermore, the outer wall of the circular shell is provided with multiple sets of striking components at equal intervals around its circumference. Each set of striking components includes a fixed sleeve that is horizontally fixed to the outer wall of the circular shell. A striking rod slides horizontally through the inside of the fixed sleeve. One end of the striking rod abuts against the inner wall of the feeding hopper, and the other end of the striking rod extends through into the inside of the circular shell and is fixedly connected to a triangular block. A first spring is sleeved on the outer wall of the striking rod inside the fixed sleeve. The two ends of the first spring are fixedly connected to the inner wall of one end of the fixed sleeve and the outer wall of the striking rod, respectively.

[0027] Furthermore, the bottom of the rotating ring is provided with multiple mounting slots at equal intervals in a ring shape. A toggle rod extends downward inside each of the mounting slots. The toggle rod intermittently abuts against the inner inclined surface of the triangular block. The top of the toggle rod is fixedly connected to the same second spring to the top inner wall of the mounting slot.

[0028] Furthermore, the top end of the vertical tube slides through the upper cavity and the lower cavity, and multiple fan blades are fixedly connected to the outer wall of the vertical tube below the circular shell at equal intervals around the circumference.

[0029] The embodiments of the present invention have the following beneficial effects:

[0030] 1. The drive motor rotates the stirring rod and multiple sets of stirring blades to mechanically stir the powder in the powder storage silo. Simultaneously, hot air enters the upper cavity inside the stirring rod through a vertical pipe, flows through a U-shaped air guide pipe, and returns to the circular shell from the lower cavity, forming a hot air circulation loop. During this process, the hot air heats the stirring rod and air guide pipe, and the heat is evenly transferred to the powder. Combined with the continuous stirring of the stirring blades, this achieves integrated heating and stirring of the powder, effectively solving the problem of difficult-to-disperse damp, clump-forming powder, and significantly improving the pre-dispersing effect.

[0031] 2. The L-shaped plate driven by the hydraulic cylinder moves the stirring rod up and down as a whole. The stirring rod slides in the first rotating sleeve without affecting its rotation drive. When the stirring rod rises, the plug moves up simultaneously to block the discharge hole, and the device is in the storage and pre-dispersing state; when the stirring rod falls, the plug opens the discharge hole, and the device switches to the discharge state. The entire operation process does not require additional valve mechanisms, has a compact structure, and has simple and reliable control logic.

[0032] 3. The rotating ring, moving up and down with the stirring rod, seals or opens the air inlet pipe. This, combined with the contact sealing between the bottom of the stirring rod and the inner wall of the circular housing, enables automatic switching between hot air circulation and fresh air delivery modes. In storage and pre-dispersion mode, hot air circulates in a closed loop, resulting in high heat utilization and low energy consumption. In material dispensing and dispersion mode, fresh air is introduced through the air inlet pipe and blown out through the air outlet and through-holes, dispersing the powder on the fixed plate. The two modes automatically switch according to the powder's state, balancing energy saving and efficient dispersion.

[0033] 4. The fixed plate receives the falling powder. When the stirring rod rotates, it drives the second rotating sleeve to rotate, causing the airflow from the air outlet and through-hole to evenly disperse the powder on the fixed plate in all directions. As the powder passes through the gaps between the triangular dispersing plates, it is further cut and guided, and finally discharged through the discharge port. The multiple effects of air blowing and mechanical guidance effectively prevent the powder from agglomerating and falling, ensuring the uniformity and dispersion of the powder during the conveying process.

[0034] 5. As the rotating ring moves downward, it drives the actuating rod to descend synchronously to the same height as the triangular block. During the rotation, the actuating rod intermittently moves the triangular block, causing the striking rod to compress the first spring. After the spring returns to its original position, it drives the striking rod to strike the inner wall of the feeding hopper, generating periodic vibrations, which effectively prevents powder from adhering to the hopper wall. At the same time, the rotation of the vertical pipe drives the fan blade to rotate, generating downward airflow, which guides the powder to flow smoothly to the discharge port, further improving the feeding efficiency and conveying stability.

[0035] This invention utilizes a lifting stirring rod linked to the opening and closing of the plug for material feeding, enabling switching between storage pre-dispersion and material dispersion modes. Hot air circulation combined with stirring enhances the pre-dispersion effect, while fresh air blowing combined with dispersion plates ensures uniform dispersion. A rotating ring linked to a striking rod vibrates to prevent adhesion, and fan blades aid flow to ensure smooth material feeding. The entire structure integrates heating, stirring, mode switching, and uniform dispersion, significantly improving powder conveying efficiency and production quality.

[0036] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art based on the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a schematic diagram of the overall structure of a powder conveying device capable of uniformly dispersing materials according to the present invention.

[0039] Figure 2 This is a cross-sectional view of the overall structure of a powder conveying device capable of uniformly dispersing materials according to the present invention.

[0040] Figure 3 This is a cross-sectional view of the overall connection structure of the powder storage silo of the present invention;

[0041] Figure 4 This is a cross-sectional view of the overall connection structure of the stirring rod of the present invention;

[0042] Figure 5 For the present invention Figure 4 A schematic diagram of a local structure in the image;

[0043] Figure 6 This is a schematic diagram of the mounting plate of the present invention;

[0044] Figure 7 For the present invention Figure 2 A schematic diagram of a local structure in the image;

[0045] Figure 8 This is a schematic diagram of the connection structure between the dispersion plate and the fixed disk in this invention;

[0046] Figure 9 For the present invention Figure 7 Further sectional view of the local structure;

[0047] Figure 10 This is a cross-sectional view of the connection structure of the rotating ring of the present invention;

[0048] Figure 11 This is a schematic diagram of the connection structure between the fixing sleeve and the striking rod of the present invention;

[0049] Figure 12 This is a schematic diagram of the structure after the stirring rod, plug, and rotating ring are moved downwards for adjustment.

[0050] In the diagram: 1. Mounting bracket; 2. Powder storage silo; 2a. Discharge port; 3. Mounting plate; 3a. Discharge hole; 4. First rotating sleeve; 5. Inlet; 6. Hydraulic cylinder; 7. Stirring rod; 7a. Upper cavity; 7b. Lower cavity; 7c. Air outlet; 8. L-shaped plate; 9. Drive motor; 10. Air duct; 11. Plug; 12. Discharge silo; 12a. Discharge port; 13. Stirring blades; 14. Fixing ring; 15. Dispersing plate; 16. Fixing disc; 17. Second rotating sleeve; 17a. Through hole; 18. Circular shell; 19. First connecting rod; 20. Vertical pipe; 21. Fixing plate; 22. Air inlet pipe; 23. Second connecting rod; 24. Rotating ring; 24a. Mounting groove; 25. Hot air blower; 26. Air outlet pipe; 27. Air duct; 28. Air guide seat; 29. ​​Fixing sleeve; 30. Striking rod; 31. Triangular block; 32. First spring; 33. Actuating rod; 34. Second spring; 35. Fan blade. Detailed Implementation

[0051] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0052] Example 1: Please refer to Figures 1-3 This embodiment provides a powder conveying device capable of uniformly dispersing materials. This device is used for heating, stirring, uniformly dispersing, and pneumatically conveying powders (such as starch raw materials) during storage and conveying. The conveying device includes a mounting bracket 1, which serves as the supporting frame for the entire device. A powder storage silo 2 is fixedly connected inside the mounting bracket 1. The powder storage silo 2 has an inlet 5 at the top and an outlet 2a at the bottom for adding and discharging powder.

[0053] like Figures 2-4As shown, a stirring mechanism is installed inside the powder storage silo 2 to stir the powder, and the stirring mechanism can be adjusted up and down. Specifically, the stirring mechanism includes a first rotating sleeve 4 that is sealed and rotatably connected to the top of the mounting bracket 1. A stirring rod 7 slides axially through the inside of the first rotating sleeve 4. The first rotating sleeve 4 and the stirring rod 7 are connected by a spline sleeve, that is, an inner spline is provided on the inner wall of the first rotating sleeve 4, and an outer spline is provided on the outer wall of the stirring rod 7. Multiple sets of stirring blades 13 are axially arranged on the outer wall of the stirring rod 7 inside the powder storage silo 2. The number of each set of stirring blades 13 is 2 to 4, and they are fixedly connected to the outer wall of the stirring rod 7 at equal intervals around the circumference.

[0054] It should be noted that the figures in this application only show the position of the stirring rod 7 inside the powder storage bin 2, but it is not limited to setting the stirring blade 13 only near the discharge port 2a. The stirring blade 13 can also be set inside the upper part. The position and number of stirring blades 13 can be set according to actual needs, and no specific limitation is made here.

[0055] like Figure 3 As shown, an L-shaped plate 8 is fixedly connected to the top outer wall of the powder storage silo 2, and the top end of the stirring rod 7 is rotatably connected to the bottom of the L-shaped plate 8. A hydraulic cylinder 6 is fixedly installed on the top outer wall of the powder storage silo 2, and the output end of the hydraulic cylinder 6 is fixedly connected to the bottom of the L-shaped plate 8. A drive motor 9 is fixedly installed on the top of the L-shaped plate 8, and the output shaft of the drive motor 9 passes through the top plate of the L-shaped plate 8 and is connected to the top end of the stirring rod 7 via a coupling.

[0056] In use, starting the drive motor 9 drives the stirring rod 7 to rotate, which in turn drives multiple sets of stirring blades 13 to rotate synchronously, achieving the effect of stirring the powder and thus initially dispersing the powder in the powder storage silo 2. Stirring the powder also facilitates its discharge, preventing blockage at the discharge port 2a. Additionally, starting the hydraulic cylinder 6 moves the L-shaped plate 8 up and down, simultaneously moving the stirring rod 7 and the drive motor 9 up and down synchronously. The stirring rod 7 slides up and down within the first rotating sleeve 4; the up-and-down adjustment of the stirring rod 7 does not affect its rotation, meaning that when the stirring rod 7 rotates, it drives the first rotating sleeve 4 to rotate as well.

[0057] like Figure 2 and Figure 6As shown, an installation plate 3 is fixedly connected inside the mounting bracket 1. The bottom of the powder storage silo 2 is in sealed contact with the top of the installation plate 3. The top of the installation plate 3 has a discharge hole 3a that corresponds to and communicates with the discharge port 2a. The bottom end of the stirring rod 7 passes through the discharge hole 3a from the discharge port 2a downwards. The outer diameter of the stirring rod 7 is smaller than the inner diameter of both the discharge port 2a and the discharge hole 3a. Of course, the diameters of the discharge port 2a and the discharge hole 3a can be the same to ensure that the powder can be discharged normally. A plug 11 for sealing the discharge hole 3a is fixedly fitted on the outer wall of the stirring rod 7.

[0058] When the stirring rod 7 moves upward, it moves the plug 11 upward, sealing the discharge hole 3a and preventing powder from falling out. At this time, the device is in a pre-dispersed storage state. Conversely, when the stirring rod 7 moves downward, the plug 11 moves downward, opening the discharge hole 3a. Powder can then be discharged from the outlet 2a through the discharge hole 3a, and the device is in the discharging state. This design allows the lifting and lowering action of the stirring mechanism to simultaneously open and close the discharge channel, eliminating the need for additional valve mechanisms. The structure is compact and the control is simple.

[0059] like Figures 1-3 , Figure 7 As shown, a feeding hopper 12 is fixedly connected to the bottom of the mounting plate 3. The feeding hole 3a communicates with the interior of the feeding hopper 12, allowing the powder to fall downwards into the feeding hopper 12. The bottom of the feeding hopper 12 is provided with a feeding port 12a, which can be connected to a pneumatic conveying pipe to directly transport the dispersed powder to the next process. The interior of the feeding hopper 12 is equipped with a powder dispersing component for dispersing and conveying the powder.

[0060] Specifically, the powder dispersion assembly includes a fixed disk 16 fixedly connected inside the feeding hopper 12, and a circular shell 18 fixedly connected to the bottom of the fixed disk 16. A second rotating sleeve 17 is rotatably and sealed at the top of the fixed disk 16. The bottom end of the stirring rod 7 slides downward through the second rotating sleeve 17 and extends into the internal space of the circular shell 18. The stirring rod 7 and the second rotating sleeve 17 are also connected by a spline sleeve, which will not be described in detail here.

[0061] like Figure 4 and Figure 5As shown, the vertical pipe 20 rotates vertically and seals through the bottom of the circular housing 18. The top end of the vertical pipe 20 extends upward into the stirring mechanism, which has an air guide channel that works in conjunction with the vertical pipe 20. Specifically, the air guide channel includes an upper cavity 7a located above the stirring rod 7 and a lower cavity 7b located at the bottom. The top end of the vertical pipe 20 extends from the lower cavity 7b into the upper cavity 7a. The outer diameter of the vertical pipe 20 is smaller than the inner diameter of the lower cavity 7b. This design allows for an annular air guide gap between the outer wall of the vertical pipe 20 and the inner wall of the lower cavity 7b. The outer diameter of the vertical pipe 20 can be smaller than or the same as the inner diameter of the upper cavity 7a. Multiple air guide pipes 10 are circumferentially fixedly connected to the outer wall of the stirring rod 7. The outer wall of the air guide pipes 10 can be provided with heat dissipation fins to increase the contact area with the powder and improve heat transfer efficiency. The top end of the air duct 10 is connected to the upper interior of the upper cavity 7a, and the bottom end of the air duct 10 is connected to the upper interior of the lower cavity 7b.

[0062] In addition, such as Figure 1 , Figure 2 and Figure 7 As shown, a fixing plate 21 is fixedly connected to one side of the mounting bracket 1. A hot air conveying mechanism is installed on the top of the fixing plate 21. The hot air conveying mechanism is connected to the bottom end of the vertical pipe 20 and the circular shell 18 through pipes, which can convey hot air from the vertical pipe 20 through the air guide channel to the stirring rod 7 and the air guide pipe 10, thereby completing the heating and stirring of the powder.

[0063] The hot air circulation path is as follows: hot air is conveyed upwards from the bottom of the vertical pipe 20 through the hot air conveying mechanism, first entering the upper cavity 7a, then the air guide pipe 10, then returning to the lower cavity 7b, and finally entering the circular shell 18 from the bottom of the stirring rod 7. The entire hot air conveying process heats the stirring rod 7 and the air guide pipe 10, transferring the heat from the hot air to the powder. Accompanied by the rotation of the stirring rod 7, this achieves heating and stirring of the powder. During the heating process, the powder is easier to disperse.

[0064] In this embodiment, the air duct 10 can be a multi-segment U-shaped tube similar to an electric heating tube, mainly used to increase the circulation time of hot air in the powder storage silo 2 and increase the contact area with the powder to achieve better heating and stirring effects.

[0065] Among them, such as Figure 7 and Figure 9As shown, the hot air conveying mechanism includes a hot air blower 25 fixedly installed on the top of the fixed plate 21. The air inlet of the hot air blower 25 is connected to an air delivery pipe 27, and the other end of the air delivery pipe 27 is sealed and passes through one side of the discharge hopper 12 and is fixedly connected to the bottom of the circular housing 18. The air outlet of the hot air blower 25 is connected to an air outlet pipe 26, and the bottom end of the vertical pipe 20 is sealed and rotatably connected to an air guide seat 28. The air guide seat 28 has an air guide cavity inside, and the other end of the air outlet pipe 26 is sealed and passes through one side of the discharge hopper 12 and is fixedly connected to one side of the air guide seat 28. When the hot air blower 25 is started, air from inside the circular housing 18 is drawn into the hot air blower 25 through the air supply pipe 27. After being heated, the air is then transported from the air outlet pipe 26 through the air guide seat 28 to the vertical pipe 20. Then, through the air guide channel inside the stirring rod 7 and in cooperation with the air guide pipe 10, the heated air is sent back to the circular housing 18 from the bottom end of the stirring rod 7, i.e., the bottom end of the lower cavity 7b. This achieves the circulation and transportation of hot air, which can reduce energy consumption.

[0066] In one aspect of this embodiment, such as Figure 9 As shown, a plurality of first connecting rods 19 are fixedly connected to the outer wall of the air guide seat 28, and the ends of the plurality of first connecting rods 19 away from the air guide seat 28 are fixedly connected to the inner wall of the discharge bin 12, in order to improve the stability of the connection of the air guide seat 28, thereby improving the connection stability of the vertical pipe 20.

[0067] This invention can be used in the field of powder conveying devices, and can also be applied to other fields.

[0068] Example 2: This example is a further improvement on the previous example: as follows Figure 7 , Figure 9 and Figure 10 As shown, to facilitate the introduction of fresh air from outside to disperse and convey the powder during the feeding process, an air inlet pipe 22 is fixedly inserted through one side of the circular shell 18. The other end of the air inlet pipe 22 is sealed and extends outward through one side of the feeding hopper 12. Multiple second connecting rods 23 are circumferentially and equidistantly connected to the outer wall of the stirring rod 7 inside the circular shell 18. The other end of each second connecting rod 23 is fixedly connected to a rotating ring 24 that rotates in contact with the inner wall of the circular shell 18. When the top of the rotating ring 24 contacts the bottom of the fixed plate 16, it seals one end of the air inlet pipe 22. It should be noted that installing an air filter at the inlet end of the air inlet pipe 22 is a conventional technique to prevent external dust from entering the hot air circulation system and to ensure the purity of the powder.

[0069] like Figure 9As shown, when the stirring rod 7 is in the upward position (storage pre-dispersion mode), its bottom end is in contact with the bottom inner wall of the circular shell 18, the plug 11 is blocking the discharge hole 3a, the top of the rotating ring 24 is in contact with the bottom of the fixed plate 16, and the air inlet pipe 22 is in a sealed state. At this time, hot air is circulated through the hot air blower 25 in the vertical pipe 20, the stirring rod 7, the air guide pipe 10, and the circular shell 18.

[0070] like Figure 12 As shown, when switching to the feeding state, the stirring rod 7 is lowered as a whole, the plug 11 moves down to open the feeding hole 3a, and contacts the top of the second rotating sleeve 17. At the same time, the bottom end of the stirring rod 7 contacts the bottom inner wall of the circular shell 18 and rotates in a sealed fit against its bottom inner wall. The stirring rod 7 also drives the rotating ring 24 to move downward via the second connecting rod 23 (the rotating ring 24 is only in a fitted rotation and can move up and down), at which time the seal on the air inlet pipe 22 is released. Under the suction of the air supply pipe 27, the air outside the feeding bin 12 is drawn into the circular shell 18 through the air inlet pipe 22, and then enters the vertical pipe 20 through the hot air blower 25 and the air outlet pipe 26, thus switching to the fresh air delivery mode.

[0071] Example 3: This example is a further improvement on the previous example: as follows Figure 5 , Figure 8 and Figure 9 As shown, the outer wall of the stirring rod 7 has multiple air outlet holes 7c that are equidistantly spaced around the circumference and communicate with the lower cavity 7b. The outer wall of the second rotating sleeve 17 has multiple through holes 17a located above the fixed plate 16, and the multiple through holes 17a are respectively matched with the multiple air outlet holes 7c.

[0072] like Figure 9 As shown, when the stirring rod 7 is in the upward adjustment (storage pre-dispersion mode), the air outlet 7c is not connected to the through hole 17a. Furthermore, since the outer wall of the stirring rod 7 slides against the inner wall of the second rotating sleeve 17, the hot air flowing from the lower cavity 7b will not be blown out from the air outlet 7c. Instead, it can only enter the circular shell 18 from the bottom of the stirring rod 7, thereby achieving the circulation of hot air.

[0073] like Figure 12As shown, when the stirring rod 7 is in the downward adjustment (dispersion mode), it simultaneously moves the air outlet 7c downward and aligns it with the corresponding through hole 17a. At this time, outside air enters through the air inlet pipe 22, but is blocked by the contact between the bottom end of the stirring rod 7 and the inner wall of the circular shell 18, preventing it from entering the circular shell 18. Instead, it is blown outward from the multiple air outlets 7c through the corresponding through holes 17a. Because this is the dispersion state, the powder will fall from the powder storage bin 2 through the outlet 2a and the discharge hole 3a onto the top of the fixed plate 16. The fixed plate 16 is fixed, while the stirring rod 7 is rotating, thus simultaneously rotating the second rotating sleeve 17. The blown air disperses the powder on the fixed plate 16 in all directions, preventing powder accumulation on the top of the fixed plate 16. The blown powder directly diffuses and hits the inner wall of the discharge bin 12, achieving the effect of dispersing the powder.

[0074] Example 4: This example is a further improvement on the previous example: as follows Figures 7-9 As shown, a plurality of dispersing plates 15 are evenly distributed around the top edge of the fixed disk 16. The horizontal cross-section of each dispersing plate 15 is triangular, with one corner of each plate facing the center of the fixed disk 16. The tops of the multiple dispersing plates 15 are fixedly connected to the same fixing ring 14, which is fixedly installed at the bottom of the mounting plate 3. The fixing ring 14 allows for the stable installation of the fixed disk 16 using the multiple dispersing plates 15, creating an annular discharge channel between the fixed disk 16 and the inner wall of the discharge hopper 12. When the stirring rod 7 rotates, the air outlet 7c, in conjunction with the through hole 17a, blows the powder falling on the fixed disk 16 outwards. The powder passes through the gaps formed by the triangular dispersing plates 15. As the powder passes through the dispersing plates 15, it is further dispersed and guided, making it easier to disperse during transport.

[0075] Example 5: This example is a further improvement on the previous example: as follows Figure 7 , Figure 9 and Figure 11 As shown, in order to prevent powder from adhering to the inner wall of the feeding hopper 12 during the conveying process and affecting the feeding efficiency, this embodiment designs multiple sets of striking components, and the multiple sets of striking components are arranged circumferentially and equidistantly on the outer wall of the circular shell 18.

[0076] Specifically, each striking assembly includes a fixed sleeve 29 horizontally fixed to the outer wall of the circular housing 18, with a striking rod 30 horizontally sliding through the interior of the fixed sleeve 29. One end of the striking rod 30 abuts against the inner wall of the feeding hopper 12, and the other end of the striking rod 30 extends through the interior of the circular housing 18 and is fixedly connected to a triangular block 31. A first spring 32 is fitted onto the outer wall of the striking rod 30 inside the fixed sleeve 29, with both ends of the first spring 32 fixedly connected to the inner wall of one end of the fixed sleeve 29 and the outer wall of the striking rod 30, respectively.

[0077] like Figure 10 As shown, the bottom of the rotating ring 24 is provided with multiple mounting slots 24a at equal intervals in an annular shape. Inside each mounting slot 24a, a toggle rod 33 extends downward. The toggle rod 33 intermittently abuts against the inner inclined surface of the triangular block 31. The top of the toggle rod 33 is fixedly connected to the same second spring 34 on the top inner wall of the mounting slot 24a.

[0078] like Figure 9 As shown, when the stirring rod 7 is in the upward adjustment (storage pre-dispersal mode), the rotating ring 24 is in the upper position and seals the air inlet pipe 22. The bottom end of the toggle rod 33 is higher than the triangular block 31. When the stirring rod 7 rotates, the toggle rod 33 will not contact the triangular block 31, so no knocking will occur.

[0079] like Figure 12 As shown, when the stirring rod 7 is in the downward adjustment (dispersion mode), the rotating ring 24 moves downward synchronously with the stirring rod 7, and the bottom end of the actuating rod 33 is at the same horizontal height as the triangular block 31. When the actuating rod 33 rotates and moves with the rotating ring 24, it contacts the inner inclined surface of the triangular block 31 and pushes the triangular block 31 to move, thereby driving the striking rod 30 to move and compress the first spring 32. When the actuating rod 33 disengages from the triangular block 31, the striking rod 30 quickly returns to its original position under the elastic force of the first spring 32 and strikes the inner wall of the feeding hopper 12, achieving a striking vibration effect on the entire feeding hopper 12, preventing powder from adhering to the feeding hopper 12, and facilitating the downward conveying of powder. By arranging multiple striking rods 30 in a ring, the vibration effect on the entire feeding hopper 12 can be improved. The generated vibration force can also be transmitted to the powder storage hopper 2 and the fixed plate 16 through the mounting plate 3, thereby improving the overall feeding effect.

[0080] During the initial preheating and mixing of the powder, the rotating ring 24 rotates, causing the relative position of the actuating rod 33 and the triangular block 31 to constantly change. When switching states and moving the rotating ring 24 downwards with the stirring rod 7, if the bottom of the actuating rod 33 comes into contact with the top of the triangular block 31 during its downward movement, the actuating rod 33 will be forced upwards and compress the second spring 34. As the actuating rod 33 rotates with the rotating ring 24, it gradually disengages from the top of the triangular block 31. After disengagement, the actuating rod 33 will automatically move downwards to reset under the elastic force of the second spring 34, ensuring that the bottom of the actuating rod 33 remains on the same horizontal plane as the inclined surface of the triangular block 31. This ensures that it can contact the inclined surface of the triangular block 31 during subsequent rotation, thereby pushing the triangular block 31 to move.

[0081] It should be noted that by setting multiple actuating rods 33 and multiple sets of striking components, during the continuous rotation of the rotating ring 24, the actuating rods 33 can continuously and intermittently cooperate with multiple sets of striking components, so that multiple striking rods 30 can achieve intermittent reset striking work by using the first spring 32 under the periodic cyclic contact between the actuating rods 33 and the triangular block 31, so as to satisfy the intermittent striking vibration of the feeding bin 12.

[0082] Example 6: This example is a further improvement on the previous example: as follows Figure 4 and Figure 9 As shown, to further improve feeding efficiency, the top end of the vertical tube 20 slides through the upper cavity 7a and the lower cavity 7b, or the top end of the vertical tube 20 slides vertically directly on the inner wall of the upper cavity 7a. The vertical tube 20 also uses a spline-like sliding connection, which will not be described in detail here. Multiple fan blades 35 are fixedly connected circumferentially at equal intervals on the outer wall of the vertical tube 20 below the circular shell 18. When the stirring rod 7 moves up and down, it can slide vertically at the top end of the vertical tube 20. Simultaneously, when the stirring rod 7 rotates, it can drive the vertical tube 20 to rotate. The bottom end of the vertical tube 20 can be sealed and rotated at the top of the air guide seat 28, allowing the vertical tube 20 to maintain stable rotation.

[0083] When the vertical pipe 20 rotates with the stirring rod 7, it can drive the fan blade 35 to rotate and move, achieving the effect of downward airflow. On the one hand, it can better convey the powder in the conveying process to the discharge port 12a, improving the discharge efficiency; on the other hand, it can generate a downward airflow inside the discharge hopper 12, so that the air blown out of the stirring rod 7 can flow downward under the guidance of the airflow, which can not only ensure the airflow conveying of materials, but also prevent the airflow from rising into the powder storage hopper 2.

[0084] However, as is well known to those skilled in the art, the working principles and wiring methods of the hydraulic cylinder 6, drive motor 9 and hot air blower 25 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A powder conveying device capable of uniformly dispersing materials, comprising a mounting bracket (1), a powder storage silo (2) fixedly connected inside the mounting bracket (1), a feed inlet (5) at the top of the powder storage silo (2), and a discharge outlet (2a) at the bottom of the powder storage silo (2), characterized in that, Also includes: A stirring mechanism is provided inside the powder storage bin (2) for stirring the powder. The stirring mechanism can be adjusted up and down. Mounting plate (3) is fixedly connected inside the mounting bracket (1). The bottom of the powder storage silo (2) is in sealed contact with the top of the mounting plate (3). The top of the mounting plate (3) is provided with a discharge hole (3a) that is connected to the discharge port (2a) from top to bottom. The feeding bin (12) is fixedly connected to the bottom of the mounting plate (3). The feeding hole (3a) is connected to the interior of the feeding bin (12). The bottom of the feeding bin (12) is provided with a feeding port (12a). The powder dispersion component is located inside the feeding hopper (12) and fixedly connected to the bottom of the mounting plate (3) for dispersing and conveying powder. The vertical tube (20) is vertically connected and rotates through the powder dispersion assembly. The top end of the vertical tube (20) extends upward into the stirring mechanism. The stirring mechanism is provided with an air guide channel that works in conjunction with the vertical tube (20). A fixed plate (21) is fixedly connected to one side of the mounting bracket (1). A hot air conveying mechanism is installed on the top of the fixed plate (21). The hot air conveying mechanism is connected to the vertical pipe (20) and the powder dispersion component through pipes respectively. It can convey hot air from the vertical pipe (20) through the air guide channel to the inside of the stirring mechanism to complete the heating and stirring of the powder. By adjusting the up and down of the stirring mechanism, the two modes of hot air circulation and fresh air conveying can be switched at will. When the hot air circulation function is in the storage state, the stirring mechanism heats and stirs the powder through hot air circulation to complete the pre-dispersion. When the fresh air conveying function is switched, the powder is automatically switched to the feeding state and the outside fresh air is conveyed to the feeding hopper (12) to achieve automatic dispersion and conveying of the powder in conjunction with the powder dispersion component.

2. The powder conveying device capable of uniformly dispersing materials as described in claim 1, characterized in that, The stirring mechanism includes a first rotating sleeve (4) that is sealed and rotatably connected to the top of the mounting bracket (1). The stirring rod (7) is axially slidably inserted inside the first rotating sleeve (4). The stirring rod (7) is provided with multiple sets of stirring blades (13) on the outer wall inside the powder storage bin (2). An L-shaped plate (8) is fixedly connected to the top outer wall of the powder storage silo (2). The top end of the stirring rod (7) is rotatably connected to the bottom of the L-shaped plate (8). A hydraulic cylinder (6) is fixedly installed on the top outer wall of the powder storage silo (2). The output end of the hydraulic cylinder (6) faces upward and is fixedly connected to the bottom of the L-shaped plate (8). A drive motor (9) is fixedly installed on the top of the L-shaped plate (8). The output shaft of the drive motor (9) rotates downward through the top of the L-shaped plate (8) and is fixedly connected to the top end of the stirring rod (7).

3. The powder conveying device capable of uniformly dispersing materials as described in claim 2, characterized in that, The bottom end of the stirring rod (7) passes through the discharge port (2a) and the discharge hole (3a) at the same time. The outer diameter of the stirring rod (7) is smaller than the inner diameter of the discharge port (2a) and the discharge hole (3a). The outer wall of the stirring rod (7) is fixedly fitted with a plug (11) located below the discharge hole (3a) and used in cooperation with it.

4. A powder conveying device capable of uniformly dispersing materials as described in claim 1 or 3, characterized in that, The powder dispersion assembly includes a fixed disk (16) fixedly connected inside the feeding hopper (12), a circular shell (18) fixedly connected to the bottom of the fixed disk (16), a second rotating sleeve (17) sealingly rotatably passing through the top of the fixed disk (16), and the bottom end of the stirring rod (7) sliding downward through the second rotating sleeve (17) and extending into the internal space of the circular shell (18). The vertical tube (20) is vertically sealed and rotates through the bottom of the circular shell (18). The air guide channel includes an upper cavity (7a) located above the inside of the stirring rod (7) and a lower cavity (7b) located at the bottom. The top end of the vertical tube (20) extends from the lower cavity (7b) into the upper cavity (7a). The outer diameter of the vertical tube (20) is smaller than the inner diameter of the lower cavity (7b). The outer wall of the stirring rod (7) is circumferentially fixed with multiple air guide tubes (10). The top end of the air guide tube (10) is connected to the upper inside of the upper cavity (7a), and the bottom end of the air guide tube (10) is connected to the upper inside of the lower cavity (7b).

5. A powder conveying device capable of uniformly dispersing materials as described in claim 4, characterized in that, The hot air conveying mechanism includes a hot air blower (25) fixedly installed on the top of the fixed plate (21). The air inlet end of the hot air blower (25) is connected to an air conveying pipe (27). The other end of the air conveying pipe (27) is sealed and passes through one side of the feeding hopper (12) and is fixedly connected to the bottom of the circular shell (18). The air outlet end of the hot air blower (25) is connected to an air outlet pipe (26). The bottom end of the vertical pipe (20) is sealed and rotatably connected to an air guide seat (28). The air guide seat (28) is provided with an air guide cavity. The other end of the air outlet pipe (26) is sealed and passes through one side of the feeding hopper (12) and is fixedly connected to one side of the air guide seat (28). The outer wall of the air guide seat (28) is fixedly connected with a plurality of first connecting rods (19), and the ends of the plurality of first connecting rods (19) away from the air guide seat (28) are fixedly connected to the inner wall of the feeding bin (12).

6. A powder conveying device capable of uniformly dispersing materials as described in claim 5, characterized in that, An air inlet pipe (22) is fixedly inserted through one side of the circular shell (18), and the other end of the air inlet pipe (22) is sealed through one side of the feeding hopper (12) and extends outward. The stirring rod (7) is located inside the circular shell (18) and is fixedly connected to a plurality of second connecting rods (23) at equal intervals around the circumference. The other end of the plurality of second connecting rods (23) is fixedly connected to the same rotating ring (24) that is in contact with the inner wall of the circular shell (18) and rotates. When the top of the rotating ring (24) abuts against the bottom of the fixed plate (16), it seals one end of the air inlet pipe (22).

7. A powder conveying device capable of uniformly dispersing materials as described in claim 6, characterized in that, The outer wall of the stirring rod (7) is provided with a plurality of air outlet holes (7c) that are connected to the lower cavity (7b) at equal intervals. The outer wall of the second rotating sleeve (17) is provided with a plurality of through holes (17a) located above the fixed plate (16) at equal intervals. The plurality of through holes (17a) correspond to the plurality of air outlet holes (7c) one by one.

8. A powder conveying device capable of uniformly dispersing materials as described in claim 7, characterized in that, The top edge of the fixed disk (16) is evenly distributed with several dispersion pieces (15). The horizontal cross section of the dispersion piece (15) is triangular, and one corner of the dispersion piece (15) is set towards the center of the fixed disk (16). The top of the multiple dispersion pieces (15) is fixedly connected to the same fixing ring (14), and the fixing ring (14) is fixedly installed on the bottom of the mounting plate (3).

9. A powder conveying device capable of uniformly dispersing materials as described in claim 8, characterized in that, The outer wall of the circular shell (18) is provided with multiple sets of striking components at equal intervals around the circumference. Each set of striking components includes a fixed sleeve (29) that is horizontally fixed to the outer wall of the circular shell (18). A striking rod (30) is horizontally slidably passed through the inside of the fixed sleeve (29). One end of the striking rod (30) abuts against the inner wall of the feeding bin (12). The other end of the striking rod (30) extends through the inside of the circular shell (18) and is fixedly connected to a triangular block (31). A first spring (32) is sleeved on the outer wall of the striking rod (30) inside the fixed sleeve (29). The two ends of the first spring (32) are fixedly connected to the inner wall of one end of the fixed sleeve (29) and the outer wall of the striking rod (30), respectively. The bottom of the rotating ring (24) is provided with multiple mounting slots (24a) at equal intervals in a ring shape. A toggle rod (33) extends downward inside each of the mounting slots (24a). The toggle rod (33) intermittently abuts against the inner inclined surface of the triangular block (31). The top of the toggle rod (33) is fixedly connected to the same second spring (34) on the top inner wall of the mounting slot (24a).

10. A powder conveying device capable of uniformly dispersing materials as described in claim 9, characterized in that, The top end of the vertical tube (20) slides through the upper cavity (7a) and the lower cavity (7b), and the outer wall of the vertical tube (20) located below the circular shell (18) is fixedly connected with multiple fan blades (35) at equal intervals around the circumference.

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