A powder automatic weighing and feeding device

Abstract

The present invention discloses an automatic weighing and feeding device for powders, which relates to the field of powder weighing technology, including a weighing mechanism and a weighing box, wherein a discharge plate is hinged in the weighing box, and a correction mechanism is arranged in the weighing box, wherein the correction mechanism includes a plurality of micro-bins for storing micro-powders and a blocking component, wherein the blocking component blocks part of the micro-bins based on the value of the weighing mechanism to correct the weight of the discharged powder. The automatic weighing and feeding device for powders provided by the present invention can obtain a weighing value after weighing the powder in the weighing box by the weighing mechanism, and when the discharge plate opens the weighing box to discharge the powder, the blocking component blocks part of the micro-bins based on the difference between the weighing value and the standard value, so that part of the powder cannot be discharged from the weighing box, thereby reducing the difference between the weight of the discharged powder in the weighing box and the standard value, thereby improving the accuracy of the weighing mechanism in quantitatively conveying the powder.

Description

Technical Field

[0001] The invention relates to the technical field of powder weighing, and in particular to an automatic powder weighing and feeding device. Background Art

[0002] Powder weighing and feeding devices are widely used in building materials, metallurgy, electric power, chemical industry, coal, coking, mining, tobacco, food, environmental protection, ports and other industries. The weighing and feeding device is an ideal equipment for continuous weighing and feeding of bulk materials. It is a high-tech product integrating weighing measurement and quantitative control, and provides accurate measurement data for production control and management of various industrial sites.

[0003] For example, the patent document with the authorization announcement number CN206945105U and the authorization announcement date of January 30, 2018, and the name of the patent document is "A High-efficiency Continuous Conveying Powder Weighing Machine", which includes a discharge pipe and a box bracket, a storage box is fixed in the middle of the upper part of the box bracket, a feed hopper is connected to the bottom of the storage box, and a vibrator is installed on the side of the feed hopper, and a weighing sensor is installed on the right side of the discharge pipe. The high-efficiency continuous conveying powder weighing machine adopts a screw feeder at the bottom, which makes the discharge and packaging more convenient.

[0004] When the powder in the prior art is transported to the weighing structure, the weighing structure cannot weigh the powder that is being transported and has not fallen onto it. Obviously, after the weighing structure detects that the weighing value has reached the standard value, some powder has not fallen into the weighing structure. Ultimately, the weight of the powder in the weighing structure will be greater than the standard value. Summary of the invention

[0005] The purpose of the present invention is to provide a powder automatic weighing and feeding device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A powder automatic weighing and feeding device, comprising a weighing mechanism and a weighing box, wherein a discharge plate is hingedly connected to the weighing box, and the weighing box is provided with:

[0008] The correction mechanism comprises a blocking component and a plurality of micro-bins for storing micro-powders. The blocking component blocks part of the micro-bins based on the value of the weighing mechanism to correct the weight of the discharged powder.

[0009] The above-mentioned automatic powder weighing and feeding device, the weighing mechanism includes a main body and a weight sensor.

[0010] In the above-mentioned automatic powder weighing and feeding device, the top of the weighing box is configured as a feed port, the bottom is configured as a discharge port, and two discharge plates are symmetrically arranged and used to block the discharge port.

[0011] In the above-mentioned automatic powder weighing and feeding device, the blocking assembly includes a blocking plate slidably arranged on the discharge plate.

[0012] In the above-mentioned automatic powder weighing and feeding device, a micro-bin is formed between the sealing plate and the discharge plate.

[0013] In the above-mentioned automatic weighing and feeding device for powders, a limiting block is constructed in the weighing box, a torsion spring is arranged between the discharge plate and the weighing box, a driving plate is slidably connected in the weighing box, and an abutment portion is fixed on the driving plate.

[0014] In the above-mentioned automatic powder weighing and feeding device, a tooth plate is fixed on the driving plate, and an elastic sheet is fixed on the discharging plate.

[0015] In the above-mentioned automatic powder weighing and feeding device, a through groove is constructed on the discharge plate, and a sliding block adapted to the through groove is fixed on the blocking plate.

[0016] In the above-mentioned automatic powder weighing and feeding device, the blocking assembly also includes an elastic member for forcing the blocking plate to move away from the discharge plate.

[0017] In the above-mentioned automatic weighing and feeding device for powders, a slide plate is slidably connected to the discharge plate, a first wedge-shaped portion and a second wedge-shaped portion are constructed on the slide plate, a third wedge-shaped portion is arranged on the blocking plate, and a wedge-shaped groove is constructed on the driving plate.

[0018] In the above technical scheme, the present invention provides an automatic weighing and feeding device for powders, which can obtain a weighing value by weighing the powder in a weighing box through a weighing mechanism. When the discharge plate opens the weighing box to discharge the powder, the sealing component blocks part of the trace silo based on the difference between the weighing value and the standard value, so that part of the powder cannot be discharged from the weighing box, thereby reducing the difference between the weight of the powder discharged from the weighing box and the standard value, thereby improving the accuracy of the quantitative delivery of powder by the weighing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0021] Figure 2 A structural schematic diagram provided for yet another embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a driving plate provided in yet another embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a blocking plate provided in yet another embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of the connecting groove and the extension portion provided in yet another embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a tooth plate structure provided in yet another embodiment of the present invention;

[0026] Figure 7 A schematic diagram of a structure of a discharge plate blocking a discharge port provided by another embodiment of the present invention;

[0027] Figure 8 A schematic diagram of a structure of a discharge plate with a discharge port opened provided by another embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of a slider structure provided by another embodiment of the present invention;

[0029] Fig.10 A schematic diagram of a slide structure provided by another embodiment of the present invention;

[0030] Fig.11 A schematic diagram of the opening structure of a micro-silo provided in another embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Weighing box; 2. Discharge plate; 3. Micro-material bin; 4. Main body; 5. Feed inlet; 6. Discharge outlet; 7. Funnel; 8. Sealing plate; 9. Rotating shaft; 10. Limiting block; 11. Driving plate; 12. Interference part; 13. Connecting groove; 14. Extension part; 15. Tooth plate; 16. Elastic sheet; 17. Sliding block; 18. Slide plate; 19. First wedge-shaped part; 20. Second wedge-shaped part; 21. Third wedge-shaped part; 22. Wedge-shaped groove; 23. First spring; 24. Second spring; 25. Fourth wedge-shaped part. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Reference Figure 1-11An embodiment of the present invention provides an automatic weighing and feeding device for powders, comprising a weighing mechanism and a weighing box 1, wherein a discharge plate 2 is hingedly connected to the weighing box 1, and a correction mechanism is arranged in the weighing box 1, wherein the correction mechanism comprises a plurality of trace silos 3 for storing trace powders and a blocking component, wherein the blocking component blocks part of the trace silos 3 based on the numerical value of the weighing mechanism to correct the weight of the discharged powder.

[0035] Specifically, powder generally needs to be weighed during the transportation process to achieve quantitative transportation, such as packaging or proportioning of powder. This requires the powder to be transported to a weighing mechanism for weighing. When the weighing value of the powder in the weighing mechanism reaches a standard value, the powder in the weighing mechanism is removed for packaging or proportioning, and then the powder can be weighed again in the weighing mechanism. In each embodiment of the present invention, the weighing mechanism includes a main body 4 and a weight sensor; the main body 4 is a support frame structure, the weight sensor is fixed on the main body 4, and the weighing box 1 is located on the weight sensor, so that the weighing box 1 and the powder in the weighing box 1 can be weighed; when the weighing value detected by the weight sensor reaches the standard value, the powder stops being transported to the weighing box 1. At this time, some powder in the air has not fallen into the weighing box 1, and the weight sensor cannot weigh the powder that has not fallen into the weighing box 1, so that after the weight sensor detects that the weighing value has reached the standard value, some powder continues to fall into the weighing box 1. Finally, the weighing value of the powder in the weighing box 1 will be greater than the standard value, which will cause the weight of the powder discharged from the weighing box 1 to be greater than the standard value. The innovation of the embodiment of the present invention is that the discharge of the weighing box 1 is controlled by the discharge plate 2. When the weighing mechanism detects that the weighing value of the powder in the weighing box 1 reaches the standard value, the powder will no longer be transported into the weighing box 1 until the powder being transported falls into the weighing box 1. The weighing mechanism detects that the weight of the powder in the weighing box 1 is greater than the standard value. At this time, the difference between the weighing value of the powder in the weighing box 1 and the standard value is the deviation value; the micro-silo 3 can be a cavity, and the blocking component can be a movable plate for blocking the cavity. When the powder is transported to the weighing box 1, part of the powder will enter the micro-silo 3. At this time, the weight of the powder in a single micro-silo 3 is the correction value (the weight of the powder in a single micro-silo The weight of the powder can be obtained through design and calculation). In each embodiment of the present invention, the correction value is less than the deviation value. For this reason, part of the trace silos 3 can be blocked by a blocking component to prevent part of the powder from being discharged from the weighing box 1, thereby achieving the purpose of correcting the weight of the discharged powder, that is, minimizing the difference between the weight of the powder discharged from the weighing box 1 and the standard value; for example, if the correction values ​​of multiple trace silos 3 are all 3g, when the deviation value is 6g or 7g, two trace silos 3 can be blocked before discharging, and when the deviation value is 8g or 9g, three trace silos 3 can be blocked before discharging, so as to minimize the difference between the weight of the powder discharged from the weighing box 1 and the standard value.

[0036] An automatic powder weighing and feeding device provided in an embodiment of the present invention can obtain a weighing value by weighing the powder in a weighing box 1 through a weighing mechanism. When the discharge plate 2 opens the weighing box 1 to discharge the powder, the blocking component blocks part of the trace silo 3 based on the difference between the weighing value and the standard value, so that part of the powder cannot be discharged from the weighing box 1, thereby reducing the difference between the weight of the powder discharged from the weighing box 1 and the standard value, thereby improving the accuracy of the weighing mechanism in quantitatively conveying the powder.

[0037] In another embodiment provided by the present invention, further, the top of the weighing box 1 is configured as a feed port 5, the bottom is configured as a discharge port 6, and two discharge plates 2 are symmetrically arranged and used to block the discharge port 6. Specifically, the weighing box 1 is hollow inside, and its top is configured as a feed port 5, and its bottom is configured as a discharge port 6. A funnel 7 is fixed to the bottom of the weighing box 1, and the funnel 7 is located at the bottom of the discharge port 6; the two discharge plates 2 can block the discharge port 6 when they rotate relative to each other in the weighing box 1. At this time, the weight of the powder in the weighing box 1 can be weighed by a weight sensor when the powder is input into the weighing box 1. After the weighing is completed, the two discharge plates 2 rotate in the opposite direction to open the discharge port 6 to discharge the powder in the weighing box 1 through the funnel 7; the driving force for the two discharge plates 2 to rotate on the weighing box 1 can select the motor structure in the prior art, which will not be repeated here.

[0038] Furthermore, the blocking assembly includes a blocking plate 8 slidably arranged on the discharge plate 2. A micro-bin 3 is formed between the blocking plate 8 and the discharge plate 2. Specifically, the opposite sides of the discharge plate 2 respectively contact with the two opposite inner walls of the weighing box 1, so that the discharge plate 2 maintains contact with the inner wall of the weighing box 1 during the process of rotating to open the discharge port 6, thereby avoiding powder leakage as much as possible; a rotating shaft 9 is fixed on the discharge plate 2 and is rotatably connected to the weighing box 1 through the rotating shaft 9, and the blocking plate 8 is arranged along the axial direction of the rotating shaft 9, and a plurality of blocking plates 8 are equidistantly arranged on the discharge plate 2, and a certain angle is formed between the blocking plate 8 and the discharge plate 2, so that the blocking plate 8, the discharge plate 2 and the two inner walls of the weighing box 1 are in contact with each other. The micro-bins 3 are formed in the space between the discharge plates 2 and the discharge plate 2. Since a plurality of sealing plates 8 are provided, a plurality of micro-bins 3 are provided on the discharge plate 2. When the discharge plate 2 closes the discharge port 6, the powder falls into the weighing box 1 and accumulates on the discharge plate 2, so that each micro-bin 3 is filled with powder. When the discharge plate 2 opens the discharge port 6, the powder in the weighing box 1 is discharged from the discharge port 6 and the discharge plate 2 one after another, while the powder in the micro-bin 3 is blocked by the sealing plate 8 and cannot slide down, and the cross-section of the powder in the micro-bin 3 is close to a triangle (such as Figure 4The figure shows a schematic diagram of the micro-bin 3 when the discharge plate 2 opens the discharge port 6), so that part of the powder can be prevented from being discharged from the weighing box 1; the sliding connection between the blocking plate 8 and the discharge plate 2 can be selected from structures such as electric push rods to control the blocking plate 8 to fit or separate from the discharge plate 2. When the blocking plate 8 and the discharge plate 2 are fitted, the micro-bin 3 can store trace powders. When the blocking plate 8 and the discharge plate 2 are separated, there is a gap between the two, so that the powder in the micro-bin 3 can pass through the gap and be discharged along the discharge plate 2. In this way, part of the micro-bin 3 can be opened or part of the micro-bin 3 can be blocked according to the situation to correct the weight of the discharged powder. Figure 4 As shown, the micro-silo 3 far from the center of the weighing box 1 is blocked preferentially, so that the powder in the micro-silo 3 close to the center of the weighing box 1 can be discharged along the discharge plate 2.

[0039] As an alternative solution for the above-mentioned motor structure to drive the discharge plate 2 to rotate, further, a limiting block 10 is constructed in the weighing box 1, a torsion spring is arranged between the discharge plate 2 and the weighing box 1, a driving plate 11 is slidably connected in the weighing box 1, and a resistance part 12 is fixed on the driving plate 11. Specifically, the torsion spring is located between the rotating shaft 9 and the weighing box 1 (not shown), and the torsion spring can force the discharge plate 2 to open the discharge port 6 and fit onto the limiting block 10. The inner wall of the weighing box 1 is vertically constructed with a driving groove, and the driving plate 11 is slidably connected in the driving groove. One side of the driving plate 11 fits with the inner wall of the driving groove, and the other side fits with the discharge plate 2, that is, the side wall of the discharge plate 2 fits with the driving plate 11 and the inner wall of the weighing box 1 at the same time, and during the rotation of the discharge plate 2, the driving plate 11 maintains contact with the discharge plate 2; the resistance part 12 is located on the side of the driving plate 11 close to the discharge plate 2 and is at the bottom of the discharge plate 2. When the driving plate 11 moves up along the driving groove, the resistance part 12 can contact the bottom of the discharge plate 2 and drive the resistance plate to rotate upward, so that the discharge plate 2 overcomes the elastic force of the torsion spring and rotates upward to block the discharge port 6. When the moving plate 11 moves downward along the driving groove, the discharge plate 2 loses the resistance of the resistance part 12, so that the discharge plate 2 can rotate downward under the action of the torsion spring to open the discharge port 6; the weighing box 1 is constructed with a connecting groove 13 connected to the driving groove, and the driving plate 11 is constructed with an extension part 14, and the extension part 14 extends to the outside of the weighing box 1 through the connecting groove 13, and a linear driving mechanism is arranged outside the weighing box 1 to drive the extension part 14 to move along the connecting groove 13 (the linear driving mechanism can select an electric push rod or a cylinder structure in the prior art, not shown), and then when the driving plate 11 moves along the driving groove, and in the process of the driving plate 11 moving along the driving groove, the connecting groove 13 is always blocked by the driving plate 11, that is, the setting of the driving plate 11 and the driving groove neither affects the blocking of the discharge port 6 by the discharge plate 2, nor affects the sealing of the outer wall of the weighing box 1. The advantage is that the extension portion 14 extends to the outside of the weighing box 1 through the connecting groove 13, so that the linear drive mechanism can be set outside the weighing box 1 to drive the drive plate 11, and it is avoided as much as possible to set the power source of the drive plate 11 in the weighing box 1 to affect the weighing and transportation of the powder.

[0040] Furthermore, a tooth plate 15 is fixed on the driving plate 11, and an elastic sheet 16 is fixed on the discharging plate 2. Specifically, the tooth plate 15 is fixed on the extension portion 14 of the driving plate 11, the rotating shaft 9 of the discharging plate 2 extends to the outside of the weighing box 1, and the elastic sheet 16 is fixed on the rotating shaft 9 of the discharging plate 2, and the tooth plate 15 and the elastic sheet 16 are both outside the weighing box 1; a plurality of teeth are constructed on the side of the tooth plate 15 close to the elastic sheet 16, and one end of the elastic sheet 16 away from the rotating shaft 9 of the discharging plate 2 abuts against the teeth, so that when the tooth plate 15 moves, it can drive the elastic sheet 16 to vibrate, thereby driving the discharging plate 2 to vibrate; when the driving plate 11 moves along the driving groove to drive the discharging plate 2 to rotate, the tooth plate 15 moves synchronously with the driving plate 11 to repeatedly abut the elastic sheet 16 through the teeth, thereby driving the elastic sheet 16 and the discharging plate 2 to vibrate, thereby making the powder in the discharging plate 2 evenly distributed and discharged along the discharging plate 2. The advantage is that, in order to avoid the adhesion of powder in the weighing box 1, a vibration motor is generally provided in the prior art to drive the weighing box 1 to vibrate. As an alternative or parallel solution to the vibration motor, a tooth plate 15 and an elastic sheet 16 structure are provided in the present embodiment. The movement of the driving plate 11 drives the tooth plate 15 to move relative to the elastic sheet 16, thereby forcing the elastic sheet 16 to repeatedly deform to drive the discharge plate 2 to vibrate. In this way, the discharge plate 2 can vibrate when the discharge port 6 is opened or closed. This can not only avoid powder residue on the discharge plate 2 as much as possible, but also avoid powder accumulation in the micro-bin 3 as much as possible (that is, try to make the cross-section of the powder in the micro-bin 3 close to a triangle), and try to keep a certain amount of powder in the micro-bin 3, so as to facilitate the precise correction of the weight of the discharged powder.

[0041] In another embodiment provided by the present invention, as an alternative solution for the electric push rod to control the blocking plate 8 to slide on the discharge plate 2, further, a through groove is constructed on the discharge plate 2, and a slider 17 adapted to the through groove is fixed on the blocking plate 8. Specifically, the slider 17 is located as a whole at the bottom of the discharge plate 2, and the blocking plate 8 is located as a whole at the top of the discharge plate 2. The slider 17 extends to the blocking plate 8 through the through groove and is fixed to the blocking plate 8, and the slider 17 can slide along the through groove. Then, the slider 17 is controlled to move along the through groove at the bottom of the discharge plate 2 to control the blocking plate 8 to slide on the discharge plate 2, so as to block the powder in the micro-bin 3 or release the blockage of the micro-bin 3. The advantage is that the top of the discharge plate 2 needs to be in direct contact with the powder, and it is inconvenient to set a power source to drive the sealing plate 8 to slide. For this purpose, a through groove and a slider 17 are set to set the power source at the bottom of the discharge plate 2 to control the slider 17 to move along the through groove, thereby controlling the sealing plate 8 to fit the discharge plate 2 or separate from the discharge plate 2; a dynamic sealing structure is provided between the slider 17 and the through groove to avoid powder leakage in the through groove when the slider 17 moves along the through groove.

[0042] Furthermore, the blocking assembly further comprises an elastic member for forcing the blocking plate 8 to move away from the discharge plate 2. The discharge plate 2 is slidably connected with a slide plate 18, the slide plate 18 is provided with a first wedge portion 19 and a second wedge portion 20, the blocking plate 8 is provided with a third wedge portion 21, and the driving plate 11 is provided with a wedge groove 22. Specifically, the elastic member is an elastic structure in a stretched state in the prior art. Preferably, the elastic member is a first spring 23, one end of which is fixed on the slider 17, and the other end is fixed on the bottom wall of the discharge plate 2. The elastic force of the first spring 23 can force the slider 17 and the blocking plate 8 to move upward along the through groove, that is, force the blocking plate 8 to move away from the discharge plate 2; a movable groove is constructed at the bottom of the discharge plate 2, and the slide plate 18 is arranged along the circumference of the rotating shaft 9. One end of the slide plate 18 is slidably connected to the movable groove, and a second spring 24 in a compressed state is arranged in the movable groove, one end of the second spring 24 is fixed on the inner wall of the movable groove, and the other end is fixed on the end of the slide plate 18, so as to force the slide plate 18 to move through the second spring 24 The slide plate 18 and the slider 17 are staggered, that is, the slider 17 will not interfere with the slide plate 18 when sliding along the through groove. The first wedge-shaped portion 19 is configured on the side of the slide plate 18 close to the slider 17, and the third wedge-shaped portion 21 is configured on the side of the slider 17 close to the slide plate 18 (the third wedge-shaped portion 21, the slider 17 and the blocking plate 8 are fixed to each other, which is equivalent to the third wedge-shaped portion 21 being arranged on the blocking plate 8), and the first wedge-shaped portion 19 is located above the third wedge-shaped portion 21; the fourth wedge-shaped portion 25 is configured at the bottom end of the wedge-shaped groove 22, and the second wedge-shaped portion 20 is configured at one end of the slide plate 18 close to the driving plate 11, and the second wedge-shaped portion 20 and the fourth wedge-shaped portion 25 correspond to each other. The effect of such a configuration is that when the driving plate 11 moves downward along the driving groove, the discharge plate 2 loses the resistance of the resistance part 12 and opens the discharge port 6 under the action of the torsion spring. At this time, the sealing plate 8 and the slide plate 18 and other structures rotate with the discharge plate 2, so that the slide plate 18 corresponds to the wedge-shaped groove 22 (that is, the slide plate 18 moves to the bottom of the wedge-shaped groove 22 and the slide plate 18 is in contact with the outer wall of the driving plate 11). In the process of the discharge plate 2 opening the discharge port 6, the slide plate 18 is in contact with the outer wall of the driving plate 11 under the action of the second spring 24. At this time, the first wedge-shaped part 19 is in contact with the top of the third wedge-shaped part 21, so that the third wedge-shaped part 2 can be prevented from moving. 1 and the slide plate 18 and other structures move upward under the action of the first spring 23, so that the blocking plate 8 is in a position of being in contact with the discharge plate 2 (that is, the micro-bin 3 is in a blocked state); then the driving plate 11 continues to move downward, so that the slide plate 18 moves to the position of the wedge-shaped groove 22, so that the slide plate 18 can be forced to move into the wedge-shaped groove 22 under the action of the second spring 24, so that the first wedge-shaped portion 19 and the third wedge-shaped portion 21 are separated, that is, the third wedge-shaped portion 21 loses the resistance of the second wedge-shaped portion 20, so that the blocking plate 8 moves upward under the action of the first spring 23, and then the micro-bin 3 is opened so that the powder inside can be discharged along the discharge plate 2.

[0043] The driving plate 11 is provided with a plurality of wedge-shaped grooves 22, one wedge-shaped groove 22 corresponds to one blocking plate 8 (or one slide plate 18), the vertical height between the bottom ends of two adjacent wedge-shaped grooves 22 (i.e., two adjacent fourth wedge-shaped portions 25) is greater than the vertical height between two adjacent slide plates 18 (when the discharge plate 2 opens the discharge port 6), and the fourth wedge-shaped portion 25 near the center of the weighing box 1 is lower, so that when the driving plate 11 moves downward along the driving groove, the plurality of slide plates 18 can be sequentially moved into the corresponding wedge-shaped grooves 22 (e.g., Fig.11 The figure shows a schematic diagram of the structure in which the slide plate 18 enters the wedge-shaped groove 22 to open the corresponding micro-bin 3, and the slide plate 18 near the center of the weighing box 1 moves into the corresponding wedge-shaped groove 22 before other slide plates 18, that is, when the driving plate 11 moves downward, multiple micro-bins 3 are opened in sequence from the center of the weighing box 1 to the outside, so that the powder in each micro-bin 3 can be discharged in sequence. The advantage is that after the powder falls into the weighing box 1, it is determined according to the deviation value and the correction value how many micro-bins 3 need to be opened to adjust the weight of the discharged powder, so as to determine the distance that the linear drive mechanism drives the driving plate 11 to move, so as to open the corresponding number of micro-bins 3 to complete the adjustment of the weight of the discharged powder, and the powder in the unopened micro-bins 3 is counted in the next powder weighing, so as to determine the moving stroke of the driving plate 11 according to the situation to adjust the weight of the discharged powder.

[0044] During the upward movement and reset of the driving plate 11, multiple fourth wedge-shaped portions 25 sequentially abut against the corresponding second wedge-shaped portions 20 to force the corresponding slide plate 18 to overcome the elastic force of the second spring 24 and be retracted into the movable groove. During the process, the first wedge-shaped portion 19 abuts against the corresponding third wedge-shaped portion 21 to force the third wedge-shaped portion 21 to overcome the elastic force of the first spring 23 and move downward, until the first wedge-shaped portion 19 abuts against the top of the third wedge-shaped portion 21 again, and the sealing plate 8 is then reset to the position that fits the discharge plate 2. In this way, multiple micro-bins 3 can be blocked in sequence during the upward movement of the driving plate 11, so as to facilitate the next trimming.

[0045] It should be noted that, in the process of the driving plate 11 moving up and resetting, the discharge plate 2 is subjected to the elastic force of the torsion spring to abut against the limiting block 10, and when the fourth wedge-shaped portion 25 abuts against the second wedge-shaped portion 20, the second wedge-shaped portion 20 and the discharge plate 2 are subjected to an upward component force, which is not sufficient to overcome the elastic force of the torsion spring, that is, the discharge plate 2 does not rotate, and the second wedge-shaped portion 20 and the slide plate 18 are directly reset under the abutment of the fourth wedge-shaped portion 25, until the multiple blocking plates 8 on the driving plate 11 are reset, and the abutment portion 12 begins to abut against the bottom of the discharge plate 2 to force the discharge plate 2 to block the discharge port 6.

[0046] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A powder automatic weighing and feeding device, comprising a weighing mechanism and a weighing box, wherein a discharge plate is hingedly connected to the weighing box, characterized in that: The weighing box is provided with: The correction mechanism comprises a blocking component and a plurality of micro-bins for storing micro-powders. The blocking component blocks part of the micro-bins based on the value of the weighing mechanism to correct the weight of the discharged powder.

2. The automatic powder weighing and feeding device according to claim 1, characterized in that: The weighing mechanism includes a main body and a weight sensor.

3. The automatic powder weighing and feeding device according to claim 1, characterized in that: The top of the weighing box is configured as a feed port, and the bottom is configured as a discharge port. Two discharge plates are symmetrically arranged and used to block the discharge ports.

4. The automatic powder weighing and feeding device according to claim 1, characterized in that: The blocking assembly comprises a blocking plate slidably arranged on a discharge plate.

5. The automatic powder weighing and feeding device according to claim 4, characterized in that: A micro-material bin is formed between the blocking plate and the discharging plate.

6. The automatic powder weighing and feeding device according to claim 4, characterized in that: A limiting block is constructed inside the weighing box, a torsion spring is arranged between the discharge plate and the weighing box, a driving plate is slidably connected inside the weighing box, a resistance part is fixed on the driving plate, the resistance part resists the bottom of the discharge plate, and the torsion spring can force the discharge plate to open the discharge port and make the discharge plate fit onto the limiting block.

7. The automatic powder weighing and feeding device according to claim 6, characterized in that: A tooth plate is fixed on the driving plate, an elastic sheet is fixed on the discharging plate, a plurality of tooth patterns are constructed on one side of the tooth plate close to the elastic sheet, and one end of the elastic sheet abuts against the tooth pattern.

8. The automatic powder weighing and feeding device according to claim 4, characterized in that: A through groove is configured on the discharge plate, and a sliding block adapted to the through groove is fixed on the blocking plate.

9. The automatic powder weighing and feeding device according to claim 6, characterized in that: The blocking assembly also includes an elastic member for forcing the blocking plate to move away from the discharge plate.

10. The automatic powder weighing and feeding device according to claim 9, characterized in that: A slide plate is slidably connected to the discharging plate, and the slide plate is provided with a first wedge-shaped portion and a second wedge-shaped portion, and a third wedge-shaped portion is arranged on the blocking plate, and a wedge-shaped groove is arranged on the driving plate. A movable groove is arranged at the bottom of the discharging plate, and one end of the slide plate is slidably connected to the movable groove, and a spring in a compressed state is arranged in the movable groove, and one end of the spring is fixed on the inner wall of the movable groove, and the other end is fixed on the end head of the slide plate, so as to force the slide plate to move out of the movable groove and abut against the driving plate, and a through groove is arranged on the discharging plate, and a sliding block adapted to the through groove is fixed on the blocking plate, the first wedge-shaped portion is arranged on a side of the slide plate close to the sliding block, the third wedge-shaped portion is arranged on a side of the sliding block close to the slide plate, and the first wedge-shaped portion is located above the third wedge-shaped portion; a fourth wedge-shaped portion is arranged at the bottom end of the wedge groove, and the second wedge-shaped portion is arranged at one end of the slide plate close to the driving plate, and the second wedge-shaped portion and the fourth wedge-shaped portion correspond to each other.

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