Micro flow scale

Abstract

The utility model discloses a micro flow scale, which comprises a hopper mechanism. The hopper mechanism comprises a funnel piece, a positioning assembly and a discharging assembly, and the bottom end of the funnel piece is connected with the discharging assembly through the positioning assembly; the discharging assembly comprises a movable disc, discharging plates and a discharging motor, the movable disc is arranged below the funnel piece, the discharging motor is fixedly connected with the positioning assembly, an output shaft of the discharging motor is in transmission connection with the movable disc, and the multiple discharging plates are evenly arranged at the upper end of the movable disc; the multiple discharging plates are arranged in an arc plate shape, and the multiple discharging plates are combined end to end to form a circular ring structure in a surrounding mode. One end of each discharging plate is a fixed end and is fixedly connected with the movable disc through the fixed end, the other end of each discharging plate is a movable end and is connected with the positioning assembly through the movable end, the movable end of each discharging plate is arranged on the outer side of the fixed end of the adjacent discharging plate, and a discharging gap is formed between the movable end of each discharging plate and the fixed end of the adjacent discharging plate.

Description

Technical Field

[0001] This utility model relates to the field of production equipment, and in particular to a micro-flow scale. Background Technology

[0002] A flow scale is a dynamic weighing device for bulk materials. It can quickly measure the instantaneous and cumulative flow through the weighing hopper of the flow scale, and has the advantages of fast weighing speed, high accuracy, and convenient installation. Patent No. ZL2022103312584 discloses a precise metering bacterial powder feeder, which can realize bacterial powder feeding and weighing operations. It includes multi-stage hoppers, a rotating shaft, and a weight sensor for weighing the change in the total mass of the material in the multi-stage hoppers. The bottom of the last stage hopper is open. Below the last stage hopper, the rotating shaft is provided with a base plate that rotates with the rotating shaft. The base plate is separated from the bottom of the hopper by a gap to form an outer peripheral discharge port for the material. The outer peripheral discharge port is provided with an adjustable scraper. This invention primarily solves the problems of large material characteristic differences, large range, and high precision when adding powders such as microbial powder. It not only has better adaptability to powders, but also can achieve accurate measurement within a large range of several kilograms to tens of kilograms for different powders. The powder ratio can be flexibly adjusted without changing the equipment. It also features dynamic weighing and continuous feeding, stable performance, accurate measurement, and high precision. It can be widely used in the control of microbial powder addition in organic fertilizer fermentation, batching, coating and other processes.

[0003] The drawback of this patent is that the simplest multi-stage silo is generally a two-stage silo with a funnel-shaped structure that is larger at the top and smaller at the bottom. The bottom, or second-stage silo, is a scraping and weighing silo. By adjusting the angle of the scraper at the outer discharge port, the amount of material fed by the bacterial powder feeder is ensured, and stable and accurate measurement is achieved. The first-stage silo is a feeding silo that supplies material to the second-stage silo.

[0004] In the above structure, the typical operation during production involves adding a relatively large amount of material to the first-stage silo. The blades in the first-stage silo slowly convey the material downwards through the bottom opening, thus avoiding bridging during production. Because the first-stage silo contains a large amount of material, it requires significant power to drive it. The second-stage silo, on the other hand, uses scraping and weighing. To ensure accurate measurement, its diameter and height cannot be too large to avoid significant weighing errors. In other words, its diameter and height are relatively small, requiring less power.

[0005] However, since the scraping and feeding actions, i.e. the actions of the first-stage and second-stage silos, are both driven by the rotating shaft connecting the two silos, it will cause a mismatch between dynamic settings and speed regulation.

[0006] Meanwhile, the second defect of the above structure is that the second-level silo does not have a leveling structure, which causes the material in the second-level silo to have different heights from the inner periphery to the center, which will also lead to inaccurate weighing. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems by providing a micro-flow scale, which features two-stage power systems for the material hoppers, matching them to the conveyor and scraper discharge systems respectively, thereby improving the accuracy of material conveying and weighing.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] A micro-flow scale includes a fixed support, a hopper mechanism, and a weighing sensor. The hopper mechanism is connected to and supported by the fixed support. The weighing sensor is positioned between the fixed support and the hopper mechanism to weigh the overall weight of the hopper mechanism. The hopper mechanism includes a funnel, a positioning component, and a discharge component. The bottom end of the funnel is connected to the discharge component via the positioning component. The discharge component includes a movable disc, a discharge plate, and a discharge motor. The movable disc is positioned below the funnel. The discharge motor is fixedly connected to the positioning component, and its output shaft is drivenly connected to the movable disc. Several discharge plates are evenly arranged on the upper end of the movable disc. Each discharge plate is arc-shaped and, when combined end-to-end, forms a ring structure. One end of each discharge plate is fixed and fixedly connected to the movable disc. The other end of each discharge plate is movable and connected to the positioning component. The movable end of the discharge plate is positioned outside the fixed end of an adjacent discharge plate, and a discharge gap is provided between the movable end of the discharge plate and the fixed end of the adjacent discharge plate.

[0010] Furthermore, the positioning assembly includes a fixed flange, columns, a positioning ring, and a base plate. The fixed flange is bolted to a mounting flange located at the bottom edge of the funnel. Several columns are rotatably connected to the edge of the fixed flange and connected to the positioning ring located below the fixed flange. The inner wall of the positioning ring is fixedly connected to the base plate through several positioning support plates. The bottom end of the base plate is fixedly connected to the discharge motor. The output shaft of the discharge motor passes through the center of the base plate and is fixedly connected to the center of the movable plate located above the base plate. The several columns are correspondingly arranged with several discharge plates. The movable end of the discharge plate is bent outward and connected to the outer peripheral side wall of the corresponding column after bending.

[0011] Furthermore, the positioning assembly also includes an adjusting cylinder and a linkage ring. One end of the adjusting cylinder is connected to the top pin of the fixed flange, and the other end of the adjusting cylinder is connected to one end pin of a connecting rod. The other end of the connecting rod is fixedly connected to the top of any column. Each of the plurality of columns has a first connecting lug fixedly connected to its middle portion and is connected to the linkage ring pin disposed between the plurality of columns through the first connecting lug.

[0012] Furthermore, a position sensor is fixedly connected to the top edge of the fixed flange. The position sensor is located on one side of the top of the column. A second connecting ear is fixedly connected to the top of the column and can rotate with the column. The second connecting ear is located on one side of the position sensor and comes into contact with the position sensor after rotating with the column to a specified angle.

[0013] Furthermore, the base plate is provided with a discharge hole, the movable disc is located above the base plate, and a sweeping protrusion is fixedly connected to the bottom end of the movable disc. The sweeping protrusion is driven by the movable disc to rotate, so as to sweep the material in the gap between the movable disc and the base plate into the discharge hole for discharge.

[0014] Furthermore, a protective plate assembly is provided between the movable disc and the fixed flange; the protective plate assembly includes a feeding mounting ring and a feeding protective plate. The feeding mounting ring is ring-shaped and is located at the upper end of the discharge plate. The top end of the feeding mounting ring is fixedly connected to the fixed flange by bolts. A protective plate groove is provided on the inner wall of the feeding mounting ring and is embedded with the bottom end of the feeding protective plate through the protective plate groove. The top end of the feeding protective plate abuts against the lower end face of the fixed flange, so that the feeding protective plate, the movable disc, and the fixed flange together form a feeding cavity with an open top. The feeding cavity is connected to the inside of the funnel component through a hollow material hole provided on the fixed flange.

[0015] Furthermore, the funnel component is a funnel structure with a large opening at the top and a small opening at the bottom. A top cover is bolted to the top of the funnel component. An automatic feeding port connected to an automatic feeding device is provided on one side of the top of the top cover, and a manual feeding port is provided on the other side of the top of the top cover. A cover plate that can be opened and closed is provided at the top of the manual feeding port.

[0016] Furthermore, a stirring assembly is provided inside the funnel component; the stirring assembly includes a stirring motor, a central shaft, and a stirring rod. The stirring motor is fixedly connected to the center position of the upper end of the top cover. The stirring motor is connected to one end of the central shaft through a coupling. The other end of the central shaft passes through the center position of the top cover and is rotatably connected to a bearing hole located at the center position of the fixed flange. The stirring rod is located inside the funnel component, and one end of the stirring rod is fixedly connected to the central shaft.

[0017] Furthermore, the feeding cavity is provided with a number of smearing plates, the bottom of the smearing plates are horizontally arranged, the smearing plates are equally spaced along the circumferential direction of the central axis, and one end of the smearing plate is fixedly connected to the outer circumferential side wall of the central axis that passes through the bearing hole.

[0018] Furthermore, the funnel component has three fixing buckles evenly spaced on the outer periphery of its top end, which are connected to a fixed bracket. The fixed bracket includes three support columns, which are correspondingly arranged with the three fixing buckles. A reinforcing plate is fixedly connected between adjacent support columns. Limiting components are fixedly connected to the top of each of the three support columns. A weighing sensor is fixedly connected to the bottom of the limiting component. The fixing buckles are nested inside the corresponding limiting components, and the bottom of the fixing buckles is connected to the top of the weighing sensor.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are:

[0020] This invention employs a design with a discharge assembly positioned below the funnel. During use, the material inside the funnel falls onto a movable disc. Under the action of the discharge motor, the material on the movable disc is dispersed outwards by centrifugal force, ultimately flowing out through the discharge gap between two adjacent discharge plates. This discharge gap is small, and combined with centrifugal force as the discharging action, it enables micro-discharging of powdery materials. Furthermore, one end of the discharge plate is fixed to the movable disc, while the other end serves as a movable end connected to a positioning assembly. The position of the movable end of the discharge plate can be adjusted via the positioning assembly, thereby adjusting the width of the discharge gap between adjacent discharge plates. By adjusting different discharge gap widths, the material flow rate can be controlled, effectively achieving the flow rate regulation effect of the micro-flow scale and meeting various usage requirements.

[0021] On the other hand, this utility model incorporates a stirring assembly inside the funnel for stirring and discharging operations, and a discharge motor at the bottom of the movable disc for discharging operations. The stirring motor and the storage motor in the stirring assembly complement each other, avoiding the situation where stirring speed adjustment and discharge speed adjustment are out of sync. Furthermore, by controlling the stirring motor and the discharge motor separately, the driving power of the entire device is effectively increased, allowing for a significant increase in the size of the entire device without affecting the measurement accuracy of the flow meter. Simultaneously, during the stirring operation, the stirring motor drives the smearing plate inside the discharging chamber to rotate. The smearing plate flattens the powder material inside the discharging chamber, allowing the powder material to flow evenly from the four discharge gaps. This solves the problem of uneven material discharge and inaccurate weighing caused by inconsistent material accumulation height, further improving the performance of the micro-flow meter. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is an assembly structure diagram of the fixed support and funnel components;

[0026] Figure 4 This is an assembly structure diagram of the positioning component and the discharging component;

[0027] Figure 5 This is a diagram showing the connection structure between the column and the linkage ring;

[0028] Figure 6 This is a structural diagram showing the connection between the column and the discharge plate.

[0029] Figure 7 This is a diagram showing the connection structure between the base plate and the discharge motor.

[0030] Figure 8 This is a diagram showing the connection structure between the movable disc and the discharge plate.

[0031] Figure 9 This is a bottom view of the structure of the movable plate;

[0032] Figure 10 This is a diagram showing the connection structure between the positioning component and the stirring component;

[0033] Figure 11 This is a schematic diagram of the stirring assembly. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present utility model.

[0035] like Figures 1 to 11As shown, this embodiment discloses a micro-flow scale, including a fixed support 2, a hopper mechanism, and a weighing sensor 10. The hopper mechanism is connected to the fixed support 2 and supported by the fixed support 2. The weighing sensor 10 is disposed between the fixed support 2 and the hopper mechanism and weighs the overall weight of the hopper mechanism.

[0036] The hopper mechanism includes a funnel component 1, a positioning component, and a discharge component. The bottom end of the funnel component 1 is connected to the discharge component through the positioning component. The discharge component includes a movable disc 19, discharge plates 18, and a discharge motor 17. The movable disc 19 is located below the funnel component 1. The discharge motor 17 is fixedly connected to the positioning component. The output shaft of the discharge motor 17 is connected to the movable disc 19 for transmission. Four discharge plates 18 are evenly arranged on the upper end of the movable disc 19. The four discharge plates 18 are all arranged in an arc shape and are combined end to end to form a ring structure. One end of the discharge plate 18 is a fixed end and is fixedly connected to the movable disc 19. The other end of the discharge plate 18 is a movable end and is connected to the positioning component. The movable end of the discharge plate 18 is located outside the fixed end of the adjacent discharge plate. A discharge gap 1801 is provided between the movable end of the discharge plate 18 and the fixed end of the adjacent discharge plate.

[0037] The circular structure formed by the combination of four discharge plates surrounds the top edge of the movable disc. The material in the funnel falls onto the movable disc and then flows out from the discharge gap between adjacent discharge plates, thus achieving the effect of feeding powdered materials.

[0038] The positioning assembly includes a fixed flange 11, columns 13, positioning rings 12, and a base plate 20. The fixed flange 11 is bolted to a mounting flange located at the bottom edge of the funnel component 1. Four columns 13 are rotatably connected to the edge of the fixed flange 11 and are connected to the positioning rings 12 located below the fixed flange 11. The inner wall of the positioning rings 12 is fixedly connected to the base plate 20 through four positioning support plates 23. The bottom end of the base plate 20 is fixedly connected to the discharge motor 17. The output shaft of the discharge motor 17 passes through the center of the base plate 20 and is fixedly connected to the center of the movable disc 19 located above the base plate 20. The four columns 13 are correspondingly arranged with four discharge plates 18. The movable end of the discharge plate 18 is bent outward and connected to the outer peripheral side wall of the corresponding column 13 after bending.

[0039] A protective plate assembly is provided between the movable disc 19 and the fixed flange 11. The protective plate assembly includes a feeding mounting ring 14 and a feeding protective plate 15. The feeding mounting ring 14 is ring-shaped and is located on the upper end of the discharge plate 18. The top end of the feeding mounting ring 14 is fixedly connected to the fixed flange 11 by bolts. A protective plate groove is provided on the inner wall of the feeding mounting ring 14 and is embedded in the bottom end of the feeding protective plate 15 through the protective plate groove. The top end of the feeding protective plate 15 abuts against the lower end face of the fixed flange 11, so that the feeding cavity 9 with the top opening is formed by the feeding protective plate 15, the movable disc 19, and the fixed flange 11. The feeding cavity 9 is connected to the inside of the funnel component 1 through the hollow material hole 1101 provided on the fixed flange 11.

[0040] The positioning component mainly enables the installation of the discharge component and the guard plate component. A discharge cavity is formed by combining the discharge guard plate, fixed flange, and movable disc. During the discharge operation, the material in the funnel first enters the discharge cavity through the perforated material hole on the fixed flange. Then, the material in the discharge cavity rotates with the movable disc and flows out through the discharge gap. This divides the entire flow rate into two spaces: the inside of the funnel and the inside of the discharge cavity. This avoids excessive pressure on the movable disc caused by the material in the funnel, facilitating the discharge operation through the rotation of the movable disc and further improving the effectiveness of this invention.

[0041] The positioning assembly also includes an adjusting cylinder 21 and a linkage ring 16. One end of the adjusting cylinder 21 is connected to the top pin of the fixed flange 11, and the other end of the adjusting cylinder 21 is connected to one end pin of the connecting rod 22. The other end of the connecting rod 22 is fixedly connected to the top of any column 13. Each of the four columns 13 has a first connecting lug 1301 fixedly connected to its middle part and is connected to the linkage ring 16 pin located between the four columns 13 through the first connecting lug 1301.

[0042] A position sensor 24 is fixedly connected to the top edge of the fixed flange 11. The position sensor 24 is located on one side of the top of the column 13. A second connecting ear 1302 is fixedly connected to the top of the column 13 and can rotate with the column 13. The second connecting ear 1302 is located on one side of the position sensor 24 and contacts the position sensor 24 after rotating with the column 13 to a specified angle.

[0043] When it is necessary to adjust the width of the discharge gap, simply control the adjusting cylinder to extend. The extension action drives the connected column to rotate via the connecting rod. The rotation of the column drives the linkage ring to rotate via the first connecting ear. The rotation of the linkage ring causes all four columns to rotate at the same angle. When the four columns rotate, they pull the movable ends of the four discharge plates to rotate, thereby changing the width of the discharge gap between adjacent discharge plates, and finally achieving the effect of adjusting the width of the discharge gap.

[0044] The base plate 20 is provided with a discharge hole 2001. The movable disk 19 is located above the base plate 20. The bottom end of the movable disk 19 is fixedly connected to a sweeping protrusion 1901. The movable disk 19 drives the sweeping protrusion 1901 to rotate, so as to sweep the material in the gap between the movable disk 19 and the base plate 20 into the discharge hole 2001 for discharge.

[0045] When the powdered material flows out from the discharge gap, it will flow out through the gap between the positioning ring and the bottom plate. Some material may drift between the bottom plate and the movable disc. When the movable disc rotates, this material will be discharged from the discharge hole on the bottom plate by the action of the sweeping protrusion, thus avoiding the situation where the material accumulates between the movable disc and the bottom plate and affects the normal rotation of the movable disc.

[0046] The funnel component 1 is a funnel structure with a large opening at the top and a small opening at the bottom. A top cover 3 is bolted to the top of the funnel component 1. An automatic feeding port 301 connected to an automatic feeding device is provided on one side of the top of the top cover 3. A manual feeding port is provided on the other side of the top of the top cover 3. A cover plate 4 that can be opened and closed is provided at the top of the manual feeding port.

[0047] Normally, automatic feeding equipment will automatically feed materials according to the weighing status of the flow meter. In case of automatic feeding equipment failure or other reasons, manual feeding can be performed through the manual feeding port.

[0048] The funnel component 1 is equipped with a stirring assembly; the stirring assembly includes a stirring motor 5, a central shaft 6, and a stirring rod 7. The stirring motor 5 is fixedly connected to the center of the upper end of the top cover 3. The stirring motor 5 is connected to the top end of the central shaft 6 through a coupling. The bottom end of the central shaft 6 passes through the center of the top cover 3 and is rotatably connected to the bearing hole 1102 located at the center of the fixed flange 11. The stirring rod 7 is located inside the funnel component 1 and one end of the stirring rod 7 is fixedly connected to the central shaft 6.

[0049] The feeding cavity 9 is provided with four smearing plates 8. The bottom ends of the four smearing plates 8 are horizontally arranged. The four smearing plates 8 are evenly spaced along the circumference of the central axis 6. One end of the smearing plate 8 is fixedly connected to the outer circumferential side wall of the central axis 6 that passes through the bearing hole 1102.

[0050] When the mixing assembly is working, the mixing rod is used to stir the material at the bottom of the funnel, so that the material enters the discharge chamber through the hollow material hole on the fixed flange, avoiding the situation where the material is blocked at the bottom of the funnel; the four rotating smearing plates can stir and smooth the material in the discharge chamber, so that the four discharge gaps formed by the four discharge plates can achieve uniform discharge operation, further improving the use effect of this utility model.

[0051] The funnel component 1 has three fixing buckles 101 evenly spaced around its top edge, which are connected to the fixing bracket 2. The fixing bracket 2 includes three support columns 201, which are correspondingly arranged with the three fixing buckles 101. A reinforcing plate 203 is fixedly connected between adjacent support columns 201. Limiting components 202 are fixedly connected to the top of each of the three support columns 201. A weighing sensor 10 is fixedly connected to the bottom of the limiting component 202. The fixing buckles 101 are nested inside the corresponding limiting component 202, and the bottom of the fixing buckles 101 is connected to the top of the weighing sensor 10.

[0052] The fixed support not only provides stable support for the funnel and the material inside the funnel, but also allows for the weighing of the material in the funnel and the discharge chamber by installing a weighing sensor between the support column and the funnel. By weighing the material in the funnel and the discharge chamber in real time, parameters such as the material discharge flow rate and discharge velocity can be calculated. The operation is simple and quick, improving the convenience of using the flow meter.

[0053] This invention employs a design with a discharge assembly positioned below the funnel. During use, the material inside the funnel falls onto a movable disc. Under the action of the discharge motor, the material on the movable disc is dispersed outwards by centrifugal force, ultimately flowing out through the discharge gap between two adjacent discharge plates. This discharge gap is small, and combined with centrifugal force as the discharging action, it enables micro-discharging of powdery materials. Furthermore, one end of the discharge plate is fixed to the movable disc, while the other end serves as a movable end connected to a positioning assembly. The position of the movable end of the discharge plate can be adjusted via the positioning assembly, thereby adjusting the width of the discharge gap between adjacent discharge plates. By adjusting different discharge gap widths, the material flow rate can be controlled, effectively achieving the flow rate regulation effect of the micro-flow scale and meeting various usage requirements.

[0054] On the other hand, this utility model incorporates a stirring assembly inside the funnel for stirring and discharging operations, and a discharge motor at the bottom of the movable disc for discharging operations. The stirring motor and the storage motor in the stirring assembly complement each other, avoiding the situation where stirring speed adjustment and discharge speed adjustment are out of sync. Furthermore, by controlling the stirring motor and the discharge motor separately, the driving power of the entire device is effectively increased, allowing for a significant increase in the size of the entire device without affecting the measurement accuracy of the flow meter. Simultaneously, during the stirring operation, the stirring motor drives the smearing plate inside the discharging chamber to rotate. The smearing plate flattens the powder material inside the discharging chamber, allowing the powder material to flow evenly from the four discharge gaps. This solves the problem of uneven material discharge and inaccurate weighing caused by inconsistent material accumulation height, further improving the performance of the micro-flow meter.

Claims

1. A micro-flow scale, comprising a fixed support, a hopper mechanism, and a weighing sensor, wherein the hopper mechanism is connected to and supported by the fixed support; the weighing sensor is disposed between the fixed support and the hopper mechanism and weighs the overall weight of the hopper mechanism; characterized in that: The hopper mechanism includes a funnel component, a positioning component, and a discharge component. The bottom end of the funnel component is connected to the discharge component via the positioning component. The discharge component includes a movable disc, a discharge plate, and a discharge motor. The movable disc is located below the funnel component. The discharge motor is fixedly connected to the positioning component. The output shaft of the discharge motor is drivenly connected to the movable disc. Several discharge plates are evenly arranged on the upper end of the movable disc. The discharge plates are all arranged in an arc shape and are combined end to end to form a ring structure. One end of the discharge plate is a fixed end and is fixedly connected to the movable disc. The other end of the discharge plate is a movable end and is connected to the positioning component. The movable end of the discharge plate is located outside the fixed end of the adjacent discharge plate. A discharge gap is provided between the movable end of the discharge plate and the fixed end of the adjacent discharge plate.

2. The micro-flow scale as described in claim 1, characterized in that: The positioning assembly includes a fixed flange, columns, a positioning ring, and a base plate. The fixed flange is bolted to a mounting flange located at the bottom edge of the funnel. Several columns are rotatably connected to the edge of the fixed flange and connected to the positioning ring located below the fixed flange. The inner wall of the positioning ring is fixedly connected to the base plate through several positioning support plates. The bottom end of the base plate is fixedly connected to the discharge motor. The output shaft of the discharge motor passes through the center of the base plate and is fixedly connected to the center of the movable plate located above the base plate. The several columns are correspondingly arranged with several discharge plates. The movable end of the discharge plate is bent outward and connected to the outer peripheral side wall of the corresponding column after bending.

3. The micro-flow scale as described in claim 2, characterized in that: The positioning assembly also includes an adjusting cylinder and a linkage ring. One end of the adjusting cylinder is connected to the top pin of the fixed flange, and the other end of the adjusting cylinder is connected to one end pin of the connecting rod. The other end of the connecting rod is fixedly connected to the top of any column. Each of the columns has a first connecting lug fixedly connected to its middle section and connected to the linkage ring pin located between the columns through the first connecting lug.

4. The micro-flow scale as described in claim 3, characterized in that: A position sensor is fixedly connected to the top edge of the fixed flange. The position sensor is located on one side of the top of the column. A second connecting ear is fixedly connected to the top of the column and can rotate with the column. The second connecting ear is located on one side of the position sensor and contacts the position sensor after rotating with the column to a specified angle.

5. The micro-flow scale as described in claim 2, characterized in that: The base plate is provided with a discharge hole, and the movable plate is located above the base plate. A sweeping protrusion is fixedly connected to the bottom end of the movable plate and the movable plate drives the sweeping protrusion to rotate so as to sweep the material in the gap between the movable plate and the base plate into the discharge hole for discharge.

6. The micro-flow scale as described in claim 2, characterized in that: A protective plate assembly is provided between the movable disc and the fixed flange; the protective plate assembly includes a feeding mounting ring and a feeding protective plate. The feeding mounting ring is ring-shaped and is located at the upper end of the feeding plate. The top end of the feeding mounting ring is fixedly connected to the fixed flange by bolts. A protective plate groove is provided on the inner wall of the feeding mounting ring and is embedded in the bottom end of the feeding protective plate through the protective plate groove. The top end of the feeding protective plate abuts against the lower end face of the fixed flange, so that the feeding protective plate, the movable disc, and the fixed flange together form a feeding cavity with an open top. The feeding cavity is connected to the inside of the funnel component through a hollow material hole provided on the fixed flange.

7. The micro-flow scale as described in claim 6, characterized in that: The funnel component is a funnel structure with a large opening at the top and a small opening at the bottom. A top cover is bolted to the top of the funnel component. An automatic feeding port connected to an automatic feeding device is provided on one side of the top of the top cover, and a manual feeding port is provided on the other side of the top of the top cover. A cover plate that can be opened and closed is provided at the top of the manual feeding port.

8. The micro-flow scale as described in claim 6, characterized in that: The funnel is equipped with a stirring assembly; the stirring assembly includes a stirring motor, a central shaft, and a stirring rod. The stirring motor is fixedly connected to the center of the top cover. The stirring motor is connected to one end of the central shaft through a coupling. The other end of the central shaft passes through the center of the top cover and is rotatably connected to a bearing hole located at the center of the fixed flange. The stirring rod is located inside the funnel and one end of the stirring rod is fixedly connected to the central shaft.

9. The micro-flow scale as described in claim 8, characterized in that: The feeding cavity is provided with several smearing plates. The bottom of the smearing plates is horizontal. The smearing plates are equally spaced along the circumference of the central axis. One end of the smearing plate is fixedly connected to the outer circumferential side wall of the central axis that passes through the bearing hole.

10. The micro-flow scale as described in claim 1, characterized in that: The funnel component has three fixing buckles evenly spaced on the outer periphery of its top end, which are connected to a fixed bracket. The fixed bracket includes three support columns, which are correspondingly arranged with the three fixing buckles. A reinforcing plate is fixedly connected between adjacent support columns. Limiting components are fixedly connected to the top of each of the three support columns. A weighing sensor is fixedly connected to the bottom of the limiting component. The fixing buckles are nested inside the corresponding limiting components, and the bottom of the fixing buckles is connected to the top of the weighing sensor.

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