Powder filling apparatus and method

Abstract

The application discloses a kind of powder perfusion equipment and perfusion method, it is related to perfusion equipment technical field, including bunker, telescopic pipe device and pusher device, bunker is used to contain powdery material;Telescopic pipe device is equipped with inlet and outlet, inlet of telescopic pipe device is communicated with bunker one end, telescopic pipe device can change the distance between inlet and outlet;Pusher device penetrates bunker and telescopic pipe device, pusher device can push the material in bunker towards outlet.The powder perfusion equipment and perfusion method of the application can reduce the dust of material when perfusing powdery material, reduce the loss of material.

Description

Technical Field

[0001] This invention relates to the field of injection equipment technology, and in particular to a powder injection equipment and injection method. Background Technology

[0002] After production, powder materials need to be filled into containers for packaging before being sold. Taking silver powder as an example, as a high-value precious metal, filling loss directly affects production costs. Similar examples include silver nitrate, silver-coated copper powder, micro / nano copper powder, and other silver compound powder materials. Current powder filling equipment typically uses a hopper and a pushing device. The pushing device pushes the powder material from the hopper into a container to complete the filling. The powder material leaves the hopper's outlet and falls into the container. The impact of the powder material easily generates dust, and any spilled powder floats in the air, causing dust pollution and material loss, thus increasing production costs. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a powder filling device that can reduce dust generation and material loss when filling powdered materials.

[0004] The present invention also proposes an injection method.

[0005] According to a first aspect of the present invention, a powder filling device includes a hopper for holding powdery materials; A telescopic tube device is provided with an inlet and an outlet. One end of the inlet of the telescopic tube device is connected to the hopper. The telescopic tube device can change the distance between the inlet and the outlet. A pushing device, which passes through the hopper and the telescopic tube device, is capable of pushing the material in the hopper toward the discharge port.

[0006] The powder filling equipment according to embodiments of the present invention has at least the following beneficial effects: the hopper is used to temporarily store materials, and the material in the hopper can be filled into a designated container, i.e., a material bucket, through a pusher device via a telescopic tube device; before filling, the telescopic tube device first extends into the bottom of the material bucket, and then the filling operation is carried out, and as the filling operation proceeds, the telescopic tube device gradually retracts, so that the distance between the outlet of the telescopic tube device and the surface of the material in the material bucket is almost consistent, which can reduce the impact of the material throughout the filling process, thereby reducing material dust and reducing material loss.

[0007] According to some embodiments of the present invention, the telescopic tube device includes a first tube body, a second tube body, and a first driving device. The feed end of the first tube body is connected to the hopper. The second tube body is fitted onto the outside of the first tube body. The feed end of the second tube body is located between the feed end and the discharge end of the first tube body. The discharge end of the second tube body extends to the outside of the discharge end of the first tube body. The first driving device is pulsatorically connected to the first tube body and the second tube body. The first driving device is capable of driving the second tube body to move relative to the first tube body along the axial direction of the second tube body.

[0008] According to some embodiments of the present invention, the outer side wall of the first pipe body is provided with a first flange, the outer side wall of the second pipe body is provided with a second flange, one end of the first driving device is fixed to the first flange, the other end of the first driving device is fixed to the second flange, and the driving stroke of the first driving device is parallel to the axis of the second pipe body.

[0009] According to some embodiments of the present invention, the feeding device includes a drive motor and a feeding screw, the feeding screw passing through the hopper and the telescopic tube device, and the feeding screw being parallel to the axis of the telescopic tube device. The drive motor is connected to the feeding screw to drive the feeding screw to rotate.

[0010] According to some embodiments of the present invention, a second driving device is further included, which is connected to the pushing device in a transmission manner, and the second driving device is capable of driving the pushing device to move axially along the telescopic tube device.

[0011] According to some embodiments of the present invention, the output shaft of the drive motor is coaxially arranged and driven by the pusher screw, the second drive device is driven by the drive motor, and the second drive device has a drive stroke along the axial direction of the pusher screw.

[0012] According to some embodiments of the present invention, the telescopic tube device is provided with a valve, which is capable of opening or closing the discharge port.

[0013] According to some embodiments of the present invention, a valve body is provided at the end of the pusher screw away from the drive motor. The valve body is located outside the discharge port. The valve body can move along the axial direction of the pusher screw to change the distance between the valve body and the end of the discharge port, or to cover the end of the discharge port with the valve body.

[0014] According to some embodiments of the present invention, the cross-sectional dimension of the valve body gradually increases along a first direction to form a conical surface on the surface of the valve body, and the conical surface is located on the side of the valve body facing the discharge port, wherein the direction of the inlet facing the discharge port is defined as the first direction.

[0015] According to the filling method of the second aspect of the present invention, powdered materials are filled into a hopper using the above-described powder filling equipment, and the filling operation is performed using the following method: First, the telescopic tube device extends toward the bottom of the material barrel until the distance between the outlet of the telescopic tube device and the bottom of the material barrel is H; Then, the feeding device is activated to pour the material in the hopper into the bucket through the telescopic tube device, and during the pouring process, the telescopic tube device is driven to move away from the bottom of the bucket, so that the distance between the discharge port and the surface of the material in the bucket is less than or equal to H. Once the material in the hopper has been filled to the set mass, the feeding device stops, and the telescopic tube device is driven to retract away from the bottom of the hopper.

[0016] The filling method according to the embodiments of the present invention has at least the following beneficial effects: the telescopic tube device first extends into the bottom of the material bucket, and then the filling operation is carried out. As the filling operation proceeds, the telescopic tube device is gradually retracted, so that the distance between the outlet of the telescopic tube device and the surface of the material in the material bucket is almost consistent. The impact of the material can be reduced throughout the filling process, thereby reducing material dust and reducing material loss.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the powder filling equipment according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of the powder filling device according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the powder filling device according to an embodiment of the present invention; Figure 4 This is a partial structural cross-sectional view of the second driving device and the pushing device according to an embodiment of the present invention; Figure 5 This is a partial structural cross-sectional view of the telescopic tube device according to an embodiment of the present invention.

[0019] Icon labels: The components include: 100 hopper, 200 telescopic pipe device, 210 first pipe body, 220 second pipe body, 230 first drive device, 240 first flange, 250 second flange, 300 pusher device, 310 drive motor, 320 pusher screw, 400 second drive device, and 510 valve body. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] As described in the background section, existing hoppers tend to generate dust when filling powdery materials into the hopper. During improvements to existing filling equipment, it was found that the distance between the hopper's outlet and the hopper is relatively large. This results in high kinetic energy in the initial stages of filling as the material accelerates downwards under gravity, causing it to impact the bottom of the hopper and generate dust.

[0025] Reference Figure 1 As shown, a powder filling device according to an embodiment of the present invention includes a hopper 100, a telescopic tube device 200, and a pushing device 300.

[0026] The hopper 100 is used to hold powdery materials; the telescopic tube device 200 is provided with an inlet and an outlet, one end of the inlet of the telescopic tube device 200 is connected to the hopper 100, and the telescopic tube device 200 can change the distance between the inlet and the outlet; the pushing device 300 passes through the hopper 100 and the telescopic tube device 200, and the pushing device 300 can push the material in the hopper 100 toward the outlet.

[0027] The silo 100 is used to temporarily store materials. Furthermore, the upper end of the silo 100 is also equipped with a feeding port and an airflow channel for balancing the internal air pressure of the silo 100.

[0028] The pushing device 300 passes through the hopper 100 and the telescopic pipe device 200. Therefore, the pushing device 300 can pour the material in the hopper 100 into a designated container through the telescopic pipe device 200. In some embodiments of this application, it is preferable to pour the material into a bucket. Before the pouring operation, the telescopic pipe device 200 is first extended to the bottom of the bucket, and then the pushing device 300 is activated to perform the pouring operation. As the pouring operation proceeds, the telescopic pipe device 200 gradually retracts, that is, the telescopic pipe device 200 moves away from the bottom of the bucket. Of course, as the pouring proceeds, the surface height of the material in the bucket gradually increases. Therefore, the distance between the outlet of the telescopic pipe device 200 and the surface of the material in the bucket can be kept almost constant, so as to reduce the impact of the material throughout the entire pouring operation, thereby reducing material dust and reducing material loss.

[0029] Reference Figure 2 As shown, it can be understood that the telescopic tube device 200 includes a first tube body 210, a second tube body 220, and a first drive device 230. The feed end of the first tube body 210 is connected to the hopper 100. The second tube body 220 is fitted outside the first tube body 210. The feed end of the second tube body 220 is located between the feed end and the discharge end of the first tube body 210. The discharge end of the second tube body 220 extends outside the discharge end of the first tube body 210. The first drive device 230 is connected to the first tube body 210 and the second tube body 220 in a transmission connection. The first drive device 230 can drive the second tube body 220 to move relative to the first tube body 210 along the axial direction of the second tube body 220.

[0030] The second tube 220 is fitted outside the first tube 210. Therefore, after material is discharged from the outlet of the first tube 210, it immediately enters the second tube 220. In this structure, the inlet of the first tube 210 is the inlet of the telescopic tube device 200, and the outlet of the second tube 220 is the outlet of the telescopic tube device 200. The first driving device 230 drives the second tube 220 to move axially relative to the first tube 210, thereby changing the distance between the inlet and outlet, allowing the telescopic tube device 200 to extend to the bottom of the hopper. Specifically, the first driving device 230 drives the second tube 220 to move axially, changing the height of the outlet of the second tube 220 within the hopper, thus controlling the distance between the outlet of the telescopic tube device 200 and the surface of the material to remain constant or fluctuate slightly.

[0031] It is important to understand that before the filling operation, after the discharge end of the second pipe 220 is inserted into the material bucket, a certain distance must be maintained between the discharge end of the second pipe 220 and the bottom of the material bucket, rather than the discharge end of the second pipe 220 contacting the bottom of the material bucket. The reserved gap is to allow the material to spread from the center of the material bucket to the edge of the material bucket. It is important to understand that during filling, the material will accumulate to form a mound structure in the center of the material bucket. If the distance between the discharge end of the second pipe 220 and the bottom of the material bucket is insufficient, or if the distance between the discharge end of the second pipe 220 and the surface of the material is insufficient, it is easy for the material to accumulate and block the discharge end of the second pipe 220.

[0032] It is understood that the outer wall of the first pipe body 210 is provided with a first flange 240, the outer wall of the second pipe body 220 is provided with a second flange 250, one end of the first driving device 230 is fixed to the first flange 240, the other end of the first driving device 230 is fixed to the second flange 250, and the driving stroke of the first driving device 230 is parallel to the axis of the second pipe body 220.

[0033] In some embodiments, the first drive device 230 uses a drive cylinder, and the distance between the first flange 240 and the second flange 250 can be changed by controlling the extension and retraction of the drive cylinder, thereby driving the second pipe body 220 to move axially.

[0034] In other embodiments, the first driving device 230 may include a servo motor and a transmission screw or transmission lead screw. The servo motor is fixed to the first flange 240, and the transmission screw is connected to the second flange 250. The servo motor is used to drive the transmission screw to rotate. When the transmission screw rotates, the second flange 250 can move along the axial direction of the transmission screw, that is, change the distance between the first flange 240 and the second flange 250, thereby driving the second tube 220 to move axially.

[0035] Reference Figure 3 As shown, it can be understood that the feeding device 300 includes a drive motor 310 and a feeding screw 320. The feeding screw 320 passes through the hopper 100 and the telescopic tube device 200, and the axis of the feeding screw 320 is parallel to that of the telescopic tube device 200. The drive motor 310 is connected to the feeding screw 320 for transmission to drive the feeding screw 320 to rotate.

[0036] Preferably, the outer diameter of the pusher screw 320 is adapted to the inner diameter of the telescopic tube device 200. When the drive motor 310 drives the pusher screw 320 to rotate, the material located in the screw groove of the pusher screw 320 will be forcibly pushed to the discharge port of the telescopic tube device 200.

[0037] It is important to understand that when the telescopic tube device 200 changes the distance between the inlet and outlet—specifically, when the distance between the inlet and outlet increases, i.e., when the telescopic tube device 200 extends into the material container—if the pushing device 300 remains stationary, the distance between the end of the pushing screw 320 and the outlet will increase. This may cause the material between the end of the pushing screw 320 and the outlet to be compressed and not move, affecting the quality of the material. For example, powdered metal may agglomerate or form dense metal blocks after being compressed. Therefore, further improvements are needed, referring to… Figure 4 As shown, it can be understood that a second drive device 400 is also included. The second drive device 400 is connected to the pusher device 300 in a transmission manner. The second drive device 400 can drive the pusher device 300 to move along the axial direction of the telescopic tube device 200.

[0038] For example, when the outlet of the telescopic tube device 200 moves toward the inside of the material bucket, the second drive device 400 synchronously drives the pusher device 300 to move toward the material bucket, so that the distance between the pusher screw 320 and the outlet remains relatively constant, that is, the end of the pusher screw 320 is as close to the outlet as possible.

[0039] It is understood that the output shaft of the drive motor 310 is coaxially arranged and connected to the pusher screw 320, and the second drive device 400 is connected to the drive motor 310. The second drive device 400 has a drive stroke along the axial direction of the pusher screw 320.

[0040] With the drive motor 310 and the pusher screw 320 coaxially driven according to the above structure, the second drive device 400 only needs to control the movement of the drive motor 310 to drive the pusher screw 320 to move. It should be understood that the driving direction of the second drive device 400 is along the axial direction of the pusher screw 320. Preferably, the second drive device 400 also uses a drive cylinder.

[0041] Understandably, the telescopic pipe device 200 is equipped with a valve that can open or close the discharge port.

[0042] The valves installed in the telescopic pipe device 200 can directly use existing valve structures. The valves are used to adjust the opening degree and control the material release speed at the outlet of the telescopic pipe device 200. When used in conjunction with the pusher device 300, the valves can more accurately control the amount of material injected.

[0043] In other embodiments, reference is made to Figure 5 As shown, it can be understood that a valve body 510 is provided at the end of the pusher screw 320 away from the drive motor 310. The valve body 510 is located outside the discharge port. The valve body 510 can move along the axial direction of the pusher screw 320 to change the distance between the valve body 510 and the end of the discharge port, or to cover the end of the discharge port with the valve body 510.

[0044] The valve body 510 can also be used as a valve when it is engaged with the end of the discharge port. For example, when the valve body 510 moves away from the discharge port, the distance between the valve body 510 and the end of the discharge port increases, that is, the valve opening increases; when the valve body 510 moves closer to the discharge port, the distance between the valve body 510 and the end of the discharge port decreases, that is, the valve opening decreases; when the valve body 510 contacts the end of the discharge port, the valve body 510 covers the end of the discharge port, that is, the valve is closed.

[0045] It is understood that the cross-sectional dimensions of the valve body 510 gradually increase along the first direction to form a conical surface on the surface of the valve body 510, and the conical surface is located on the side of the valve body 510 facing the discharge port, and the direction of the inlet towards the discharge port is defined as the first direction.

[0046] When the material is discharged from the telescopic tube device 200, it is guided by the conical surface of the valve body 510, which changes the direction of the material's movement. Specifically, the conical surface changes the direction of the material's velocity as it falls, thereby reducing the material's kinetic energy, minimizing material impact, and reducing dust generation.

[0047] An embodiment of the present invention provides a filling method for filling a hopper with powdered material using the aforementioned powder filling equipment, and the filling operation is performed using the following method: First, the telescopic tube extends toward the bottom of the bucket until the distance between the outlet of the telescopic tube and the bottom of the bucket is H. Then, start the feeding device to pour the material in the hopper into the bucket through the telescopic tube device, and drive the telescopic tube device to move away from the bottom of the bucket during the filling process, so that the distance between the discharge port and the surface of the material in the bucket is less than or equal to H. Once the material in the hopper has been filled to the set mass, the feeding device stops, and the telescopic tube device retracts away from the bottom of the hopper.

[0048] In some embodiments, firstly, the first driving device 230 drives the second tube 220 to move and extend into the material bucket, and controls the distance between the discharge end of the second tube 220 and the bottom of the material bucket to be H. Simultaneously, while the first driving device 230 drives the second tube 220, the second driving device 400 also drives the pushing device 300 to move, causing the pushing screw 320 to move towards the material bucket. During filling, the second driving device 400 further adjusts the position of the pushing device 300, causing the valve body 510 on the pushing screw 320 to open the discharge end of the second tube 220. Then, the driving motor 310 drives the pushing screw 320 to rotate, discharging the material. During the filling process, as the material is discharged, the surface of the material in the bucket gradually rises. At this time, the first drive device 230 needs to control the second tube 220 to move away from the bucket to raise the discharge end of the second tube 220. At the same time, the second drive device 400 also drives the pusher device 300 to move, and synchronously raises the pusher screw 320 to ensure that the distance between the discharge end of the second tube 220 and the surface of the material in the bucket is less than or equal to H. Preferably, the distance is controlled to be maintained at H or slightly less than H to avoid excessive distance causing material impact and dust generation.

[0049] Once the material in the hopper has been filled to the set mass, the pusher screw 320 stops rotating, and the second drive device 400 drives the pusher device 300 to move, causing the valve body 510 to close the discharge end of the second pipe 220. Then, the second pipe 220 and the pusher screw 320 simultaneously rise and leave the hopper. It is important to understand that throughout the filling process, the hopper is placed on a weighing device, and the weighing device is used to determine whether the material has been filled to the set mass.

[0050] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A powder filling device, characterized in that, include: A hopper (100) for holding powdery materials; The telescopic pipe device (200) is provided with an inlet and an outlet. One end of the inlet of the telescopic pipe device (200) is connected to the silo (100). The telescopic pipe device (200) can change the distance between the inlet and the outlet. A pushing device (300) is provided, which extends through the hopper (100) and the telescopic tube device (200). The pushing device (300) is capable of pushing the material in the hopper (100) toward the discharge port.

2. The powder filling equipment according to claim 1, characterized in that, The telescopic tube device (200) includes a first tube body (210), a second tube body (220), and a first driving device (230). The feed end of the first tube body (210) is connected to the hopper (100). The second tube body (220) is fitted outside the first tube body (210). The feed end of the second tube body (220) is located between the feed end and the discharge end of the first tube body (210). The discharge end of the second tube body (220) extends outside the discharge end of the first tube body (210). The first driving device (230) is connected to the first tube body (210) and the second tube body (220) in a transmission connection. The first driving device (230) can drive the second tube body (220) to move relative to the first tube body (210) along the axial direction of the second tube body (220).

3. The powder filling equipment according to claim 2, characterized in that, The outer side wall of the first pipe body (210) is provided with a first flange (240), and the outer side wall of the second pipe body (220) is provided with a second flange (250). One end of the first driving device (230) is fixed to the first flange (240), and the other end of the first driving device (230) is fixed to the second flange (250). The driving stroke of the first driving device (230) is parallel to the axis of the second pipe body (220).

4. The powder filling equipment according to claim 1, characterized in that, The feeding device (300) includes a drive motor (310) and a feeding screw (320). The feeding screw (320) passes through the hopper (100) and the telescopic tube device (200), and the feeding screw (320) is parallel to the axis of the telescopic tube device (200). The drive motor (310) is connected to the feeding screw (320) to drive the feeding screw (320) to rotate.

5. The powder filling equipment according to claim 4, characterized in that, It also includes a second drive device (400), which is connected to the pusher device (300) in a transmission manner. The second drive device (400) can drive the pusher device (300) to move along the axial direction of the telescopic tube device (200).

6. The powder filling equipment according to claim 5, characterized in that, The output shaft of the drive motor (310) is coaxially arranged and driven by the pusher screw (320). The second drive device (400) is driven by the drive motor (310) and has a drive stroke along the axial direction of the pusher screw (320).

7. The powder filling equipment according to claim 1, characterized in that, The telescopic tube device (200) is equipped with a valve, which can open or close the discharge port.

8. The powder filling equipment according to claim 5, characterized in that, A valve body (510) is provided at the end of the pusher screw (320) away from the drive motor (310). The valve body (510) is located outside the discharge port. The valve body (510) can follow the pusher screw (320) and move along the axial direction of the pusher screw (320) to change the distance between the valve body (510) and the end of the discharge port, or to cover the end of the discharge port with the valve body (510).

9. The powder filling equipment according to claim 8, characterized in that, The cross-sectional dimension of the valve body (510) gradually increases along a first direction to form a conical surface on the surface of the valve body (510), and the conical surface is located on the side of the valve body (510) facing the discharge port, and the direction of the inlet facing the discharge port is defined as the first direction.

10. A method for infusion, characterized in that, The powder filling equipment according to any one of claims 1 to 9 is used to fill the hopper with powdered material, and the filling operation is performed using the following method: First, the telescopic tube device extends toward the bottom of the material barrel until the distance between the outlet of the telescopic tube device and the bottom of the material barrel is H; Then, the feeding device is activated to pour the material in the hopper into the bucket through the telescopic tube device, and during the pouring process, the telescopic tube device is driven to move away from the bottom of the bucket, so that the distance between the discharge port and the surface of the material in the bucket is less than or equal to H. Once the material in the hopper has been filled to the set mass, the feeding device stops, and the telescopic tube device is driven to retract away from the bottom of the hopper.

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