A powder delivery device

Abstract

The application discloses a powder conveying device, which comprises a support, a suction assembly, a bin and a control element, wherein the suction assembly comprises a driving element, a suction head, a suction pipe, a vacuum suction barrel and a vacuum pump, the suction head is connected with the vacuum suction barrel through the suction pipe, the vacuum pump is connected with the vacuum suction barrel, a discharge valve is installed on the lower end discharge port of the vacuum suction barrel, the feed port of the bin is communicated with the discharge port of the vacuum suction barrel, the driving element can drive the suction head to move, the driving element, the vacuum pump and the discharge valve are all connected with the control element, the control element controls the vacuum pump to open and close according to the set time, the control element controls the discharge valve to open and close according to the set time, and the control element controls the driving element to drive the suction head to move according to the set track. The powder conveying device can realize smooth output of the powder material with high water content, can save the labor cost and improve the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of material conveying technology, and in particular to a powder conveying device. Background Technology

[0002] For materials such as rare earth carbonates, the current feeding method is to first put the material into the kiln's hopper, and then feed it into the kiln by a feeder. However, because these powders have a high moisture content, their flowability is very poor, and they are prone to accumulating in the hopper and causing bridging of empty material in the hopper. This makes it difficult for the powder in the hopper to be transported to the kiln. Therefore, manual loosening of the material is necessary during the feeding process.

[0003] In order to reduce the labor intensity of workers, there are existing technologies that install vibrators or other mixing devices on the silo, but the improvement effect is not obvious. Summary of the Invention

[0004] The purpose of this invention is to provide a powder conveying device that can smoothly output powdery materials with high moisture content, thereby saving labor costs and improving work efficiency.

[0005] To achieve the above objectives, the present invention provides a powder conveying device, including a support frame, a suction assembly, a hopper, and a control component. The suction assembly includes a drive component, a suction head, a suction pipe, a vacuum suction barrel, and a vacuum pump. The suction head is connected to the vacuum suction barrel via the suction pipe, and the vacuum pump is connected to the vacuum suction barrel. A discharge valve is installed at the lower outlet of the vacuum suction barrel. The inlet of the hopper is connected to the outlet of the vacuum suction barrel. The drive component can drive the suction head to move. The drive component, the vacuum pump, and the discharge valve are all connected to the control component. The control component controls the vacuum pump to open and close at a set time, controls the discharge valve to open and close at a set time, and controls the drive component to drive the suction head to move along a set trajectory.

[0006] In a preferred embodiment, a weighing device for detecting the weight of the vacuum suction bucket is installed on the vacuum suction bucket. The weighing device is connected to the control device. When the weight of the vacuum suction bucket detected by the weighing device reaches a first set value, the control device controls the suction assembly to stop suction. When the weight of the vacuum suction bucket detected by the weighing device reaches a second set value, the control device controls the suction assembly to start suction. The second set value is less than the first set value.

[0007] In a preferred embodiment, a level switch is installed on the hopper, and the level switch is connected to the control component. When the level switch detects that the material in the hopper is lower than a set first height, the control component controls the discharge valve to open. When the level switch detects that the material in the hopper is higher than a set second height, the control component controls the discharge valve to close. The second height is higher than the first height.

[0008] In a preferred embodiment, the drive is a multi-axis servo system or an articulated robot, and the drive is mounted on the bracket.

[0009] In a preferred embodiment, the suction head is a retractable suction head, and a detection switch is provided on the suction head. The detection switch is connected to a control component. When the drive component drives the suction head to descend rapidly to contact the material and compress the suction head, the control component controls the drive component to reduce the descent speed of the suction head according to the signal from the detection switch.

[0010] In a preferred embodiment, the retractable suction head includes an upper suction head section, an outer sleeve, a lower suction head section, a first fixing member, a second fixing member, and a guide rod. The upper suction head section is fixedly connected to the suction sleeve. The outer sleeve is fitted onto the upper suction head section and fixedly connected to it. The first fixing member is fixed to the outer sleeve, and the second fixing member is fixed to the lower suction head section. The first fixing member and the second fixing member are connected by the guide rod, which can slide vertically on the first fixing member and / or the second fixing member. The upper end of the lower suction head section can slide vertically into the outer sleeve.

[0011] In a preferred embodiment, a compression spring is further provided between the first fixing member and the second fixing member, and the compression spring is fitted onto the guide link.

[0012] In a preferred embodiment, the bracket is further equipped with hooks for securing ton bags, which are then secured to the bracket via the hooks.

[0013] In a preferred embodiment, the driving member drives the suction head to move within a set suction area. There is a gap between the edge of the set suction area and the edge of the ton bag. A ton bag extrusion cylinder is also fixedly installed on the bracket. An extrusion block is installed on the outer end of the piston rod of the ton bag extrusion cylinder. The ton bag extrusion cylinder can extrude the side wall of the ton bag, so that the side wall of the ton bag is close to the set suction area.

[0014] In a preferred embodiment, the end face of the extrusion block facing the ton bag is a convex arc surface.

[0015] In a preferred embodiment, the ton bag extrusion cylinder is connected to a control unit. The control unit sets the maximum single-run time of the vacuum pump. When the vacuum pump reaches the maximum run time, if the weight of the vacuum suction barrel detected by the suction barrel weighing device does not reach the first set value, the control unit activates the ton bag extrusion cylinder to extrude and push the material outside the suction area inside the ton bag into the suction area.

[0016] The difference between this invention and existing technologies lies in the fact that the powder conveying device provided by this invention uses a drive component to drive a suction head to suck up powdery materials using negative pressure. During the suction process, a control component controls the drive component to move the suction head along a set trajectory, thereby sucking in most of the air while simultaneously sucking in the material. This keeps the material in the vacuum suction barrel in a dispersed state with air gaps. Simultaneously, the control component controls the vacuum pump to open and close at set intervals, making the suction intermittent. This ensures that the amount of material sucked into the vacuum suction barrel each time is consistent, guaranteeing that the material in the vacuum suction barrel remains in a dispersed state with air gaps. This ensures smooth material conveying during unloading. The discharge valve also opens and closes at set intervals via the control component to ensure the amount of material entering the hopper, thus keeping the material in the hopper dispersed. Therefore, the powder conveying device provided by this invention can achieve smooth output of powdery materials with high moisture content, saving labor costs and improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a powder conveying device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a powder conveying device according to another embodiment of the present invention;

[0019] Figure 3 yes Figure 2 A schematic diagram of the retractable suction head of the powder conveying device shown;

[0020] Figure 4 This is a schematic diagram of the distribution structure of the ton bag extrusion cylinders around the ton bag;

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Support; 2-Hopper; 3-Drive component; 4-Suction head; 5-Suction pipe; 6-Vacuum suction bucket; 7-Vacuum pump; 8-Discharge valve; 9-Suction bucket weighing component; 10-Level switch; 11-Detection switch; 12-Hook; 13-Ton bag extrusion cylinder; 14-Suction area; 15-Upper section of suction head; 16-Outer sleeve; 17-Lower section of suction head; 18-First fixing component; 19-Second fixing component; 20-Guide connecting rod; 21-Compression spring; 22-Extrusion block; 24-Feeder; 25-Ton bag. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0024] The accompanying drawings show structural schematic diagrams according to embodiments of this application. These drawings are not drawn to scale, and some details have been enlarged for clarity, and some details may have been omitted. The various regions, shapes, and their relative sizes and positional relationships shown in the drawings are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / structures of different shapes, sizes, and relative positions according to actual needs.

[0025] Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] In the description of this application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0028] The powder conveying device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0029] refer to Figure 1 As shown, the powder conveying device of the basic embodiment of the present invention includes a support 1, a suction assembly, a hopper 2, and a control component. Figure 1As shown, the hopper 2 can be fixedly installed on the bracket 1, and the discharge port at the lower end of the hopper 2 can be connected to the inlet of the feeder 24 connected to the kiln. The hopper 2 and the feeder 24 can also be an integral structure.

[0030] like Figure 1 As shown, the material suction assembly includes a drive unit 3, a suction head 4, a suction pipe 5, a vacuum suction tank 6, and a vacuum pump 7. The bracket 1 is used to install components such as the hopper 2 and the drive unit 3. The bracket 1 can be a single unit with sections for installing various components; alternatively, the bracket 1 can be as follows: Figure 1 As shown, it is a split structure, that is, the support 1 includes multiple sub-supports.

[0031] The suction head 4 is connected to the vacuum suction tank 6 via the suction pipe 5, and the vacuum pump 7 is connected to the vacuum suction tank 6. A discharge valve 8 is installed on the lower outlet of the vacuum suction tank 6. The vacuum pump 7 is preferably a Roots vacuum pump. Both the vacuum pump 7 and the vacuum suction tank 6 can be fixedly mounted on the bracket 1. The inlet of the hopper 2 is connected to the outlet of the vacuum suction tank 6, such as... Figure 1 As shown, the hopper 2 is located below the vacuum suction barrel 6. The material output from the outlet of the vacuum suction barrel 6 can fall into the inlet of the hopper 2, thus achieving communication between the inlet of the hopper 2 and the outlet of the vacuum suction barrel 6. Of course, the inlet of the hopper 2 and the vacuum suction barrel 6 can also be connected by pipes or other connecting parts.

[0032] The driving component 3 can drive the suction head 4 to move. The driving component 3 can adopt various existing driving structures that can drive the suction head 4 to move up, down, left, right, forward, and backward. Preferably, the driving component 3 is a multi-axis servo system or an articulated robot. The driving component 3 is mounted on the bracket 1, and the driving rod of the driving component 3 is connected to the suction head 4, thereby driving the suction head 4 to move.

[0033] The drive unit 3, vacuum pump 7, and discharge valve 8 are all connected to the control unit, which can be a common control device such as a PLC or industrial computer. The control unit controls the vacuum pump 7 to open and close at set times, controls the discharge valve 8 to open and close at set times, and controls the drive unit 3 to drive the suction head 4 to move along a set trajectory. The movement trajectory can be a spiral, a zigzag, etc. The opening and closing times of the vacuum pump 7 can be determined based on factors such as the moisture content and particle size of the conveyed powdered material. By setting the opening and closing times of the vacuum pump 7, the amount of material stored in the vacuum suction hopper 6 can be determined, ensuring that the material stored in the vacuum suction hopper 6 does not exceed the designed maximum quantity, thus guaranteeing the material's flowability. The control unit controls the discharge valve 8 to open and close at set times, preventing excessive material accumulation in the hopper 2 and reducing flowability. Multiple control units can be installed on devices such as the discharge valve 8, or a single control unit can be connected to various devices via wired or wireless means.

[0034] The powder conveying device provided by this invention, during the material suction process, simultaneously draws in most of the air through the suction head 4, thus keeping the material in the vacuum suction barrel 6 in a dispersed state with air gaps. At the same time, the vacuum pump 7 is controlled by a control unit to open and close at set intervals, making the suction intermittent. This ensures a consistent amount of material drawn into the vacuum suction barrel 6 each time, guaranteeing that the material in the vacuum suction barrel 6 remains dispersed with air gaps. This ensures smooth material conveying during unloading. Simultaneously, the discharge valve 8 is also controlled by a control unit to open and close at set intervals, ensuring the amount of material entering the hopper 2, thus keeping the material in the hopper 2 in a dispersed state and preventing bridging and empty material in the hopper. Therefore, the powder conveying device provided by this invention can achieve smooth output of powdery materials with high moisture content, saving labor costs and improving work efficiency.

[0035] The powder conveying device provided by the present invention can convey materials (powders) including materials with high moisture content or poor flowability, such as rare earth carbonates.

[0036] Based on the above embodiments, further preferably, such as Figure 1As shown, a weighing element 9 for detecting the weight of the vacuum suction bucket 6 is installed on the vacuum suction bucket 6. The weighing element 9 can employ various existing weight sensors. The weighing element 9 is connected to the control unit. When the weight of the vacuum suction bucket 6 detected by the weighing element 9 reaches a first set value, the control unit controls the suction assembly to stop suction. When the weight of the vacuum suction bucket 6 detected by the weighing element 9 reaches a second set value, the control unit controls the suction assembly to start suction. The second set value is less than the first set value. The first and second set values ​​can be determined based on factors such as the type, particle size, and moisture content of the powdered material. In this embodiment, by setting the weighing component 9 of the suction bucket to detect the weight of the vacuum suction bucket 6 in real time, the opening and closing time of the vacuum pump 7 can be indirectly controlled by monitoring the weight of the material in the vacuum suction bucket 6. Thus, after setting the first setting value and the second setting value, it can be applied to materials with similar moisture content but different types, without having to set the opening and closing time of the vacuum pump 7 for each different powder material.

[0037] In a further preferred embodiment of the invention, such as Figure 1 As shown, a level switch 10 is installed on the silo 2. The level switch 10 is connected to the control component. When the level switch 10 detects that the material in the silo 2 is lower than a set first height, the control component controls the discharge valve 8 to open. When the level switch 10 detects that the material in the silo 2 is higher than a set second height, the control component controls the discharge valve 8 to close. The second height is higher than the first height. The first and second heights are determined based on factors such as the type, particle size, and moisture content of the material. In this embodiment, by setting the level switch 10 to detect the height of the material in the silo 2 in real time, the opening and closing time of the discharge valve 8 is indirectly controlled. Therefore, by simply setting the first and second heights, it can be applied to materials with similar moisture contents but different types, without needing to set the opening and closing time of the discharge valve 8 for each different powdery material, thus avoiding material accumulation in the silo 2.

[0038] In another preferred embodiment of the invention, such as Figure 2 , Figure 3As shown, the suction head 4 is a telescopic suction head, and its telescopic length can be 10-20 mm. A detection switch 11 is provided on the suction head 4, and the detection switch 11 is connected to the control component. The detection switch 11 can detect the compression amount of the suction head 4, and can be a mechanical or photoelectric switch. When the driving component 3 drives the suction head 4 to descend rapidly until it contacts the material and is compressed, the control component controls the driving component 3 to reduce the descent speed of the suction head 4 according to the signal from the detection switch 11. In this embodiment, by setting the suction head 4 as a retractable structure and detecting the compression status of the suction head 4 through the detection switch 11, during the descent and suction operation of the suction head 4, when it is not in contact with the material, the suction head 4 is in an extended state, the detection switch 11 has no signal, and the suction head 4 descends rapidly. When it comes into contact with the material, the suction head 4 is compressed due to the obstruction of the material, the detection switch 11 receives a signal, and transmits it to the control component, reducing the descent speed of the suction head 4. This ensures that the equipment is not damaged while improving the working efficiency of the powder conveying device.

[0039] In this invention, the suction head 4 can adopt various existing telescopic structures. Preferably, such as Figure 2 , Figure 3 As shown, the retractable suction head includes an upper suction head section 15, an outer sleeve 16, a lower suction head section 17, a first fixing member 18, a second fixing member 19, and a guide rod 20. The upper suction head section 15 is fixedly connected to the suction tube 5, and the outer sleeve 16 is fitted onto the upper suction head section 15 and fixedly connected to it. The first fixing member 18 is fixed to the outer sleeve 16, and the second fixing member 19 is fixed to the lower suction head section 17. The first fixing member 18 and the second fixing member 19 can adopt various existing common structures, such as... Figure 3 As shown, the first fixing member 18 can be a fixing plate, and the second fixing member 19 can be a roughly U-shaped fixing frame. The first fixing member 18 and the second fixing member 19 are connected by the guide rod 20. The guide rod 20 can slide vertically on the first fixing member 18 and / or the second fixing member 19, that is, the guide rod 20 can slide vertically through the through holes opened on the first fixing member 18 or the second fixing member 19, or simultaneously slide through the through holes on the first fixing member 18 and the second fixing member 19. The upper end of the lower section 17 of the suction head can slide vertically into the outer sleeve 16. The detection switch 11 can be installed on the first fixing member 18, and determines whether the suction head 4 is compressed by detecting the distance between the first fixing member 18 and the second fixing member 19.

[0040] To ensure more stable operation of the suction head 4, such as Figure 3As shown, a compression spring 21 is also provided between the first fixing member 18 and the second fixing member 19, and the compression spring 21 is fitted on the guide rod 20.

[0041] This invention is applicable to various containers for holding powdery materials to be conveyed. When using a 25-ton bag to hold the material to be conveyed, to make the powder conveying device more convenient to use, such as... Figure 2 As shown, preferably, a hook 12 for fixing the ton bag 25 is also installed on the bracket 1, and the ton bag 25 is fixed on the bracket 1 by the hook 12.

[0042] like Figure 4 As shown, in a further preferred embodiment of the present invention, the driving member 3 drives the suction head 4 to move within the designated suction area 14. The edge of the designated suction area 14 is spaced from the edge of the ton bag 25, thereby preventing the suction head 4 from contacting the side wall of the ton bag 25 and becoming blocked. Figure 2 , Figure 4 As shown, a ton bag squeezing cylinder 13 is also fixedly installed on the bracket 1. A squeezing block 22 is installed on the outer end of the piston rod of the ton bag squeezing cylinder 13. The ton bag squeezing cylinder 13 can squeeze the side wall of the ton bag 25, causing the side wall of the ton bag 25 to approach the designated suction area 14. The end face of the squeezing block 22 facing the ton bag 25 is preferably a convex arc surface. In this embodiment, by setting the suction area 14 and the ton bag squeezing cylinder 13, the powder conveying device can be better suited for conveying materials contained in the ton bag 25.

[0043] In this invention, the ton bag extrusion cylinder 13 can also be connected to the control unit. After the single suction amount is set (i.e., the first set value and the second set value are set), the drive unit 3 can drive the suction head 4 to move back and forth repeatedly in the suction area 14 until the suction weight is reached. At the same time, the control unit can set the upper limit of the single suction time of the suction component, i.e., set the maximum single running time of the vacuum pump 7. When the upper limit of the time is reached, if the suction weight is still not met, it is determined that there is no material in the suction area. At the same time, the ton bag extrusion cylinder 13 is started to extrude and push the material outside the suction area 14 in the ton bag 25 into the suction area 14.

[0044] As can be seen from the above, the powder conveying device provided by the present invention can directly take material from the ton bag 25 when suctioning. The suction range of the suction head 4 is limited to the central area of ​​the ton bag 25, and will not cause blockage due to suctioning the ton bag. At the same time, the ton bag extrusion cylinder 13 will extrude and push the material outside the movement range of the suction head 4 to the suction area 14, ensuring that the powder conveying device can suck up the material in the ton bag 25 to the maximum extent.

[0045] The order of the above embodiments is for ease of description only and does not represent the superiority or inferiority of the implementation methods.

[0046] Finally, it should be noted that although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A powder conveying device, characterized in that... The system includes a support frame (1), a material suction assembly, a hopper (2), and control components. The material suction assembly includes a drive unit (3), a material suction head (4), a material suction pipe (5), a vacuum suction tank (6), and a vacuum pump (7). The material suction head (4) is connected to the vacuum suction tank (6) through the material suction pipe (5), and the vacuum pump (7) is connected to the vacuum suction tank (6). A discharge valve (8) is installed on the lower outlet of the vacuum suction tank (6), and the inlet of the hopper (2) is connected to... The outlet of the vacuum suction barrel (6) is connected, the drive unit (3) can drive the suction head (4) to move, the drive unit (3), the vacuum pump (7) and the discharge valve (8) are all connected to the control unit, the control unit controls the vacuum pump (7) to open and close according to the set time, the control unit controls the discharge valve (8) to open and close according to the set time, and the control unit controls the drive unit (3) to drive the suction head (4) to move according to the set trajectory; The suction head (4) is a retractable suction head. A detection switch (11) is provided on the suction head (4). The detection switch (11) is connected to the control component. When the drive component (3) drives the suction head (4) to descend rapidly to contact the material and compress the suction head (4), the control component controls the drive component (3) to reduce the descent speed of the suction head (4) according to the signal of the detection switch (11). The retractable suction head includes an upper section (15) of the suction head, an outer sleeve (16), a lower section (17) of the suction head, a first fixing component (18), a second fixing component (19) and a guide rod (20). The upper section (15) of the suction head... The suction tube (5) is fixedly connected to the suction tube (5), the outer tube (16) is fitted on the upper section (15) of the suction head and fixedly connected to the upper section (15) of the suction head, the first fixing member (18) is fixed on the outer tube (16), the second fixing member (19) is fixed on the lower section (17) of the suction head, the first fixing member (18) and the second fixing member (19) are connected by the guide rod (20), the guide rod (20) can slide in the up and down direction on the first fixing member (18) and / or the second fixing member (19), and the upper end of the lower section (17) of the suction head can slide up and down into the outer tube (16); The bracket (1) is also equipped with a hook (12) for fixing the ton bag (25), and the ton bag (25) is fixed to the bracket (1) by the hook (12); the driving member (3) drives the suction head (4) to move within the set suction area (14), and there is a gap between the edge of the set suction area (14) and the edge of the ton bag (25). The bracket (1) is also fixedly installed with a ton bag extrusion cylinder (13), and an extrusion block (22) is installed on the outer end of the piston rod of the ton bag extrusion cylinder (13). The ton bag extrusion cylinder (13) can extrude... The side wall of the ton bag (25) is positioned so that it is close to the set suction area (14). The ton bag extrusion cylinder (13) is connected to the control unit. The control unit sets the maximum single running time of the vacuum pump (7). When the vacuum pump (7) reaches the maximum running time, if the weight of the vacuum suction barrel (6) detected by the suction barrel weighing component (9) does not reach the first set value, the control unit starts the ton bag extrusion cylinder (13) to extrude and push the material outside the suction area (14) in the ton bag (25) to the suction area (14).

2. The powder conveying device according to claim 1, characterized in that, The vacuum suction barrel (6) is equipped with a suction barrel weighing device (9) for detecting the weight of the vacuum suction barrel (6). The suction barrel weighing device (9) is connected to the control device. When the weight of the vacuum suction barrel (6) detected by the suction barrel weighing device (9) reaches a first set value, the control device controls the suction assembly to stop suction. When the weight of the vacuum suction barrel (6) detected by the suction barrel weighing device (9) reaches a second set value, the control device controls the suction assembly to start suction. The second set value is less than the first set value.

3. The powder conveying device according to claim 1, characterized in that, A material level switch (10) is installed on the silo (2). The material level switch (10) is connected to the control component. When the material level switch (10) detects that the material in the silo (2) is lower than the set first height, the control component controls the discharge valve (8) to open. When the material level switch (10) detects that the material in the silo (2) is higher than the set second height, the control component controls the discharge valve (8) to close. The second height is higher than the first height.

4. The powder conveying device according to claim 1, characterized in that, The drive unit (3) is a multi-axis servo system or an articulated robot, and the drive unit (3) is mounted on the bracket (1).

5. The powder conveying device according to claim 1, characterized in that, A compression spring (21) is also provided between the first fixing member (18) and the second fixing member (19), and the compression spring (21) is fitted on the guide link (20).

6. The powder conveying device according to claim 1, characterized in that, The end face of the extrusion block (22) facing the ton bag (25) is a convex arc surface.

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