Aluminum hydroxide powder feeding device and feeding method

Abstract

This invention provides an aluminum hydroxide powder feeding device and method, including a feeding box, a box cover installed on the top left side of the feeding box, a motor installed on the top right side of the feeding box, a main shaft connected to the output end of the motor, a spiral feeding plate installed on the outer side of the main shaft, a baffle installed at the bottom end of the main shaft, a secondary shaft installed at the bottom of the baffle, and a scraping drive assembly connected to the outer side of the secondary shaft. The secondary scraper moves downward inside the main scraper and engages with the rack groove at the recess of the auxiliary scraper through a connecting gear, so that the secondary scraper moves downward and rotates outward of the main scraper as the main scraper moves downward. After the main scraper moves downward and adheres to the upper surface of the semi-circular support plate, the secondary scraper rotates through the connecting gear to make the secondary scraper block adhere to the upper surface of the semi-circular support plate. The secondary scraper follows the rotation of the main scraper and scrapes off the powder adhering to the upper surface of the semi-circular support plate.

Description

Technical Field

[0001] This invention relates to the field of chemical powder conveying technology, and in particular to an aluminum hydroxide powder feeding device and feeding method. Background Technology

[0002] In traditional operations, aluminum hydroxide powder needs to be unpacked, weighed in bulk, and then transferred to a feeding device for feeding and conveying. Powder conveying mainly involves precise dispensing based on the required amount, thereby meeting the needs of refined processing, improving conveying efficiency, and reducing powder loss. This provides technical insights into powder conveying.

[0003] The study on powder conveying revealed the following problems:

[0004] When the powder feeding device conveys powder, the required amount of powder is weighed by a weight sensor and the quantity is recorded. However, when the powder is weighed on the weighing plate, some powder will stick to the weighing plate. Because some powder sticks to the weighing plate, the powder stuck to the weighing plate cannot be scraped off after the feeding device weighs it, resulting in a deviation in the quantity of powder, thus failing to meet the requirements of fine processing.

[0005] Currently, the existing technology CN113998485A aluminum hydroxide powder feeding and weighing device discloses a powder feeding device. This invention uses a motor reversing, at which time the spiral feeding plate slowly and orderly pushes the powder downward through the feeding pipe. At the same time, the arc electromagnet is de-energized to release the restriction on the slip ring, and the ring electromagnet is de-energized to release the adsorption on the metal ring. At this time, the ratchet drives the gear sleeve to rotate, which in turn drives the push rod to rotate. This causes the guide ball at the bottom of the push rod to intermittently push the inclined ring, thereby pushing the baffle. This allows the powder to flow slowly and orderly into the channel. The pressure sensor sends the signal to the controller and finally displays the weight of the powder on the display panel. The motor can drive the main shaft and the thin shaft to rotate, which in turn drives the scraper and plastic spring to clean and scrape the inner wall of the channel and the semi-circular support plate, so that the powder can fall into the channel quickly and avoid powder residue.

[0006] This invention mainly solves the problem that powder cannot be completely scraped off after being weighed on the weighing plate, resulting in the powder not meeting the requirements for fine processing. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides an aluminum hydroxide powder feeding device and feeding method to solve the problems described in the background art.

[0008] The purpose and effect of the aluminum hydroxide powder feeding device and feeding method of the present invention are achieved by the following specific technical means: The aluminum hydroxide powder feeding device includes a feeding box, a box cover is installed on the top left side of the feeding box, a motor is installed on the top right side of the feeding box, the output end of the motor is connected to a main shaft, a spiral feeding plate is installed on the outer side of the main shaft, a baffle is installed at the bottom end of the main shaft, a secondary shaft is installed at the bottom of the baffle, a scraping drive assembly is connected to the outer side of the secondary shaft, a support column is installed on the bottom outer side of the feeding box, a discharge pipe is installed at the bottom center of the feeding box, a channel is installed at the bottom of the discharge pipe, a display panel is installed on the outer side of the channel, and the drive assembly includes a connecting rod, a main scraper, an auxiliary scraper, a semi-circular support plate, a main scraping block, an auxiliary scraping block, and a connecting block. One end of the connecting rod is connected to the main scraper, a main scraping block is installed on one side of the main scraper, an auxiliary scraping block is set inside the main scraping block, an auxiliary scraper is set inside the main scraper, and a connecting block and a semi-circular support plate are respectively connected to both ends of the auxiliary scraper from top to bottom.

[0009] Furthermore, the main scraper is concave, and an auxiliary scraping and discharge component is provided inside the concave opening. The interior of the main scraper is hollow.

[0010] Furthermore, the auxiliary scraper is disposed inside the main scraper. The auxiliary scraper is concave and has a toothed groove on one side of the concave opening. The bottom of the auxiliary scraper is fitted to the upper surface of the semi-circular support plate, and the length of the auxiliary scraper is the same as the inclined length of the channel.

[0011] Furthermore, the main scraper is initially set at an angle and fits against the inner wall of the channel. The interior of the main scraper is hollow, and an auxiliary scraper is installed through the hollow part.

[0012] Furthermore, the connecting block is arranged in a "Z" shape and is respectively embedded in one end opening of the main scraper and one end opening of the main scraper block.

[0013] Furthermore, the discharge assembly includes a secondary scraper, a secondary scraper block, a connecting gear, a screen plate, a screen block, and a slider. The connecting gear is installed on the left side of the front of the secondary scraper, the screen plate is provided on the right side of the front of the secondary scraper, the screen block is provided on one side of the screen plate, the slider is installed on one side of the screen block, and the secondary scraper block is installed at the bottom of the secondary scraper.

[0014] Furthermore, the secondary scraper is embedded in the recess of the main scraper, and its interior is hollow, with openings on the front, back and right sides.

[0015] Furthermore, the connecting gear is meshed with the rack groove at the recess of the auxiliary scraper.

[0016] Furthermore, the two screen plates are respectively set at the openings on the front and back of the auxiliary scraper. The screen plates are arranged in a grid pattern, and the inner sides of the grid are all open. Each opening is provided with a limit block. The screen blocks are arranged in a diamond shape and are matched with the grid of the screen plates. The screen blocks are connected to the screen plates through sliders. The sliders are embedded in the openings of the screen plates and are arranged in an "L" shape.

[0017] Furthermore, the specific operating steps of the aluminum hydroxide powder feeding method are as follows:

[0018] S1: The motor reverses direction. At this time, the spiral feeder slowly and orderly pushes the powder through the feed pipe to push the baffle downward. The baffle pushes the auxiliary shaft to shift downward.

[0019] S2: The main scraper slides downward on the outer side of the auxiliary scraper because the length of the auxiliary scraper is the same as the inclined length of the channel. At the same time, the main scraper drives the main scraper block to move downward and fit against the upper surface of the semi-circular support plate.

[0020] S3: The auxiliary scraper rotates through the connecting gear to make the auxiliary scraper block fit against the upper surface of the semi-circular support plate. The auxiliary scraper follows the rotation of the main scraper to make the auxiliary scraper block scrape off the powder adhering to the upper surface of the semi-circular support plate.

[0021] S4: When the auxiliary scraper rotates clockwise or counterclockwise following the main scraper, the end of the auxiliary scraper away from the main scraper remains stationary and rotates in place. The screen block on one side of the auxiliary scraper is embedded in the grid of the screen plate by the inertia generated by the rotation of the auxiliary scraper through the slider, so that one side of the auxiliary scraper is in a closed state and the other side is in an open state.

[0022] S5: The motor drives the main shaft to rotate while the secondary shaft rotates. The rotation of the secondary shaft drives the connecting rod to make the main scraper scrape off the powder falling on the inner wall of the channel.

[0023] S6: The powder enters the interior of the auxiliary scraper through the unclosed side of the auxiliary scraper. The powder rotates inside the auxiliary scraper and is subjected to centrifugal force. The side of the auxiliary scraper is closed, so the powder is discharged through the opening on the right side of the auxiliary scraper under the action of centrifugal force. The end of the auxiliary scraper away from the main scraper keeps rotating in place, so the throwing force of the powder under the action of centrifugal force is reduced, and the powder is discharged at the center of the semi-circular support plate.

[0024] Beneficial effects:

[0025] 1. When the motor reverses, the spiral feeder slowly and orderly pushes the powder through the feed pipe downwards to push the baffle. The baffle pushes the secondary shaft downwards. The length of the main scraper is the same as the inclined length of the channel, so that the main scraper slides downwards on the outer side of the auxiliary scraper. At the same time, the main scraper moves the main scraper block downwards and fits against the upper surface of the semi-circular support plate. Then, while the motor drives the main shaft to rotate, the secondary shaft rotates. The rotation of the secondary shaft drives the connecting rod to make the main scraper block scrape off the powder falling on the inner wall of the channel.

[0026] 2. The auxiliary scraper moves downward inside the main scraper and engages with the rack groove at the recess of the auxiliary scraper through the connecting gear. As the main scraper moves downward, the auxiliary scraper moves downward and rotates outward. After the main scraper moves downward and adheres to the upper surface of the semi-circular support plate, the auxiliary scraper rotates through the connecting gear to make the auxiliary scraper block adhere to the upper surface of the semi-circular support plate. The auxiliary scraper follows the rotation of the main scraper and scrapes off the powder adhering to the upper surface of the semi-circular support plate.

[0027] 3. When the auxiliary scraper rotates clockwise following the main scraper, the end of the auxiliary scraper away from the main scraper remains stationary while the main body of the auxiliary scraper rotates with the main scraper. The screen block on the front side of the auxiliary scraper is embedded in the grid of the screen plate by the inertia generated by the rotation of the auxiliary scraper through the slider, so that the front of the auxiliary scraper is closed, while the back side is not closed due to inertia, to prevent the powder on the upper surface of the semi-circular support plate from being scraped off and accumulating, making it difficult to collect.

[0028] 4. The powder enters the interior of the secondary scraper through the back of the secondary scraper. The powder rotates inside the secondary scraper and is subjected to centrifugal force. Since the front of the secondary scraper is closed, the powder is discharged through the opening on the right side of the secondary scraper under the action of centrifugal force. The end of the secondary scraper away from the main scraper keeps rotating in place, which reduces the throwing force of the powder under the action of centrifugal force. As a result, the powder is discharged at the center of the semi-circular support plate. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the disassembled baffle structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the main scraper structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the main scraper's disassembled structure according to the present invention;

[0034] Figure 6 This is a schematic diagram of the internal structure of the auxiliary scraper of the present invention;

[0035] Figure 7 This is a schematic diagram of the secondary scraper structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the sieve plate structure of the present invention;

[0037] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point A in the middle;

[0038] Figure 10 This is a schematic diagram of the sieve block structure of the present invention.

[0039] Figure 1-10 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0040] 1. Feeding box; 101. Support column; 102. Box cover; 103. Motor; 2. Discharge pipe; 201. Channel; 202. Display panel; 203. Main shaft; 204. Spiral feed plate; 205. Baffle; 206. Sub-shaft; 3. Connecting rod; 301. Main scraper; 302. Auxiliary scraper; 303. Semi-circular support plate; 304. Main scraper block; 305. Auxiliary scraper block; 306. Connecting block; 4. Weighing assembly; 5. Sub-scraper; 501. Sub-scraper block; 502. Connecting gear; 503. Screen plate; 504. Screen block; 505. Sliding block. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] As attached Figure 1 To be continued Figure 10 As shown:

[0043] Example 1:

[0044] An aluminum hydroxide powder feeding device includes a feeding box 1, a box cover 102 installed on the top left side of the feeding box 1, a motor 103 installed on the top right side of the feeding box 1, a main shaft 203 connected to the output end of the motor 103, a spiral feeding plate 204 installed on the outer side of the main shaft 203, a baffle 205 installed at the bottom end of the main shaft 203, a secondary shaft 206 installed at the bottom of the baffle 205, a scraping drive assembly connected to the outer side of the secondary shaft 206, a support column 101 installed on the outer side of the bottom of the feeding box 1, a discharge pipe 2 installed at the center of the bottom of the feeding box 1, a channel 201 installed at the bottom of the discharge pipe 2, and a display panel 202 installed on the outer side of the channel 201.

[0045] The drive assembly includes a connecting rod 3, a main scraper 301, an auxiliary scraper 302, a semi-circular support plate 303, a main scraper block 304, an auxiliary scraper block 305, and a connecting block 306. One end of the connecting rod 3 is connected to the main scraper 301. The main scraper block 304 is installed on one side of the main scraper 301. The auxiliary scraper block 305 is provided inside the main scraper block 304. The auxiliary scraper 302 is provided inside the main scraper 301. The two ends of the auxiliary scraper 302 are connected to the connecting block 306 and the semi-circular support plate 303 from top to bottom, respectively.

[0046] The inner wall of the channel 201 is inclined, and the end of the main shaft 203 near the baffle 205 is connected to the secondary shaft 206.

[0047] Among them, the main scraper 301 is concave, and an auxiliary scraping material discharge component is provided in the concave opening. The interior of the main scraper 301 is hollow.

[0048] The auxiliary scraper 302 is disposed inside the main scraper 301. The auxiliary scraper 302 is concave and has a toothed groove on one side of the concave opening. The bottom of the auxiliary scraper 302 is fitted to the upper surface of the semi-circular support plate 303, and the length of the auxiliary scraper 302 is the same as the inclined length of the channel 201.

[0049] The main scraper 304 is initially set at an angle and fits against the inner wall of the channel 201. The interior of the main scraper 304 is hollow, and an auxiliary scraper 305 is installed through the hollow part.

[0050] The connecting block 306 is arranged in a "Z" shape and is respectively embedded in one end opening of the main scraper 301 and one end opening of the main scraper 304;

[0051] When motor 103 reverses, the spiral feeder 204 slowly and orderly pushes the powder through the feed pipe 2 downward to push the baffle 205. The baffle 205 pushes the secondary shaft 206 downward. The secondary shaft 206 drives the connecting rod 3 to move downward and simultaneously drives the main scraper 301 to move downward. The length of the main scraper 301 through the auxiliary scraper 302 is the same as the inclined length of the channel 201, so that the main scraper 301 slides downward on the outer side of the auxiliary scraper 302. At the same time, the main scraper 301 drives the main scraper block 304 to move downward and fit against the upper surface of the semi-circular support plate 303. Then, while the motor 103 drives the main shaft 203 to rotate, the secondary shaft 206 rotates. The rotation of the secondary shaft 206 drives the connecting rod 3 to make the main scraper block 304 scrape off the powder falling on the inner wall of the channel 201.

[0052] Example 2:

[0053] The difference between this embodiment and embodiment 1 is that the discharge assembly includes a secondary scraper 5, a secondary scraper block 501, a connecting gear 502, a screen plate 503, a screen block 504, and a slider 505. The connecting gear 502 is installed on the left side of the front of the secondary scraper 5, the screen plate 503 is provided on the right side of the front of the secondary scraper 5, the screen block 504 is provided on one side of the screen plate 503, the slider 505 is installed on one side of the screen block 504, and the secondary scraper block 501 is installed at the bottom of the secondary scraper 5.

[0054] Among them, the auxiliary scraper 5 is embedded in the recess of the main scraper 301. The interior of the auxiliary scraper 5 is hollow, and the front, back and right sides are all open.

[0055] The connecting gear 502 is meshed with the rack groove at the recess of the auxiliary scraper 302.

[0056] Two sieve plates 503 are respectively set at the openings on the front and back of the auxiliary scraper 5. The sieve plates 503 are arranged in a grid pattern. The inner side of the grid is open, and a limit block is set at each opening.

[0057] The sieve block 504 is arranged in a diamond shape and is matched with the mesh of the sieve plate 503. The sieve block 504 is connected to the sieve plate 503 through a slider 505. The slider 505 is embedded in the opening of the sieve plate 503 and is arranged in an "L" shape.

[0058] As the main scraper 301 moves downward via the connecting rod 3, it also drives the auxiliary scraper 5 downward. The auxiliary scraper 5 moves downward inside the main scraper 301 and engages with the rack groove at the recess of the auxiliary scraper 302 via the connecting gear 502. This causes the auxiliary scraper 5 to move downward and rotate outward from the main scraper 301 as the main scraper 301 moves downward. After the main scraper 301 moves downward and adheres to the upper surface of the semi-circular support plate 303, the auxiliary scraper 5 rotates via the connecting gear 502, causing the auxiliary scraper block 501 to adhere to the upper surface of the semi-circular support plate 303. The auxiliary scraper 5 follows the rotation of the main scraper 301, causing the auxiliary scraper block 501 to scrape off the powder adhering to the upper surface of the semi-circular support plate 303. When the auxiliary scraper 5 rotates clockwise with the main scraper 301, the end of the auxiliary scraper 5 away from the main scraper 301 remains... The auxiliary scraper 5 rotates in place, and its main body follows the rotation of the main scraper 301. The screen block 504 on one side of the front of the auxiliary scraper 5 is embedded in the grid of the screen plate 503 by the inertia generated by the rotation of the auxiliary scraper 5 through the slider 505, so that the front of the auxiliary scraper 5 is closed, while its back is not closed due to inertia, to prevent the powder on the upper surface of the semi-circular support plate 303 from being scraped off and accumulating. The powder enters the interior of the auxiliary scraper 5 through the back of the auxiliary scraper 5. The powder rotates inside the auxiliary scraper 5 and is subjected to centrifugal force. Since the front of the auxiliary scraper 5 is closed, the powder is discharged through the opening on the right side of the auxiliary scraper 5 under the action of centrifugal force. The end of the auxiliary scraper 5 away from the main scraper 301 keeps rotating in place, so that the throwing force of the powder under the action of centrifugal force is reduced, and the powder is discharged at the center of the semi-circular support plate 303.

[0059] Example 3:

[0060] The specific operating steps for feeding aluminum hydroxide powder are as follows:

[0061] S1: Motor 103 reverses, at which time the spiral feeder 204 slowly and orderly pushes the powder through the feed pipe 2 downward to push the baffle 205, and the baffle 205 pushes the secondary shaft 206 downward.

[0062] S2: The length of the main scraper 301 is the same as the inclined length of the auxiliary scraper 302, so that the main scraper 301 slides downward on the outer side of the auxiliary scraper 302. At the same time, the main scraper 301 drives the main scraper block 304 to move downward and fit against the upper surface of the semi-circular support plate 303.

[0063] S3: The auxiliary scraper 5 rotates through the connecting gear 502 to make the auxiliary scraper block 501 adhere to the upper surface of the semi-circular support plate 303. The auxiliary scraper 5 rotates with the main scraper 301 to make the auxiliary scraper block 501 scrape off the powder adhering to the upper surface of the semi-circular support plate 303.

[0064] S4: When the auxiliary scraper 5 rotates clockwise or counterclockwise following the main scraper 301, the end of the auxiliary scraper 5 away from the main scraper 301 remains stationary and rotates in place. The screen block 504 on one side of the auxiliary scraper 5 is embedded in the grid of the screen plate 503 by the inertia generated by the rotation of the auxiliary scraper 5 through the slider 505, so that one side of the auxiliary scraper 5 is in a closed state and the other side is in an open state.

[0065] S5: The motor 103 drives the main shaft 203 to rotate, while the secondary shaft 206 rotates. The rotation of the secondary shaft 206 drives the connecting rod 3 to scrape the powder falling on the inner wall of the channel 201 by the main scraper 304.

[0066] S6: The powder enters the interior of the auxiliary scraper 5 through the unclosed side of the auxiliary scraper 5. The powder rotates inside the auxiliary scraper 5 and is subjected to centrifugal force. Since one side of the auxiliary scraper 5 is closed, the powder is discharged through the opening on the right side of the auxiliary scraper 5 under the action of centrifugal force. The end of the auxiliary scraper 5 away from the main scraper 301 keeps rotating in place, which reduces the throwing force of the powder under the action of centrifugal force. As a result, the powder is discharged at the center of the semi-circular support plate 303.

[0067] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An aluminum hydroxide powder feeding device, comprising a feeding box (1), characterized in that, A cover (102) is installed on the top left side of the feeding box (1), and a motor (103) is installed on the top right side of the feeding box (1). The output end of the motor (103) is connected to a main shaft (203). A spiral feeding plate (204) is installed on the outer side of the main shaft (203). A baffle (205) is installed at the bottom end of the main shaft (203). A secondary shaft (206) is installed at the bottom of the baffle (205). A scraping drive assembly is connected to the outer side of the secondary shaft (206). A support column (101) is installed on the outer side of the bottom of the feeding box (1). A discharge pipe (2) is installed at the center of the bottom of the feeding box (1). A channel (201) is installed at the bottom of the discharge pipe (2). A display panel (202) is installed on the outer side of the channel (201). The drive assembly includes a connecting rod (3), a main scraper (301), an auxiliary scraper (302), a semi-circular support plate (303), a main scraper block (304), an auxiliary scraper block (305), and a connecting block (306). One end of the connecting rod (3) is connected to the main scraper (301). The main scraper block (304) is installed on one side of the main scraper (301). The auxiliary scraper block (305) is provided inside the main scraper block (304). The auxiliary scraper (302) is provided inside the main scraper (301). The two ends of the auxiliary scraper (302) are connected to the connecting block (306) and the semi-circular support plate (303) from top to bottom, respectively. The main scraper (301) is concave, and an auxiliary scraping material discharge component is provided in the concave opening. The interior of the main scraper (301) is hollow. The auxiliary scraper (302) is disposed inside the main scraper (301). The auxiliary scraper (302) is concave and has a toothed groove on one side of the concave opening. The bottom of the auxiliary scraper (302) is fitted to the upper surface of the semi-circular support plate (303), and the length of the auxiliary scraper (302) is the same as the inclined length of the channel (201). The discharge assembly includes a secondary scraper (5), a secondary scraper block (501), a connecting gear (502), a screen plate (503), a screen block (504), and a slider (505). The connecting gear (502) is installed on the left side of the front of the secondary scraper (5), the screen plate (503) is provided on the right side of the front of the secondary scraper (5), the screen block (504) is provided on one side of the screen plate (503), the slider (505) is installed on one side of the screen block (504), and the secondary scraper block (501) is installed at the bottom of the secondary scraper (5). The secondary scraper (5) is embedded in the recess of the main scraper (301). The interior of the secondary scraper (5) is hollow, and the front, back and right sides are all open.

2. The aluminum hydroxide powder feeding device according to claim 1, characterized in that, The main scraper (304) is initially set at an angle and fits against the inner wall of the channel (201). The interior of the main scraper (304) is hollow, and an auxiliary scraper (305) is installed through the hollow part.

3. The aluminum hydroxide powder feeding device according to claim 2, characterized in that, The connecting block (306) is arranged in a "Z" shape and is respectively embedded in one end opening of the main scraper (301) and one end opening of the main scraper (304).

4. The aluminum hydroxide powder feeding device according to claim 1, characterized in that, The connecting gear (502) is meshed with the rack groove at the recess of the auxiliary scraper (302).

5. The aluminum hydroxide powder feeding device according to claim 1, characterized in that, The two sieve plates (503) are respectively set at the openings on the front and back of the auxiliary scraper (5). The sieve plates (503) are arranged in a grid pattern. The inner side of the grid is open and a limit block is set at each opening. The sieve block (504) is a diamond-shaped block and is matched with the grid of the sieve plate (503). The sieve block (504) is connected to the sieve plate (503) through a slider (505). The slider (505) is embedded in the opening of the sieve plate (503) and is "L" shaped.

6. A method for feeding aluminum hydroxide powder, characterized in that, The specific operating steps of the aluminum hydroxide powder feeding device according to any one of claims 1-5 are as follows: S1: The motor (103) reverses, and at this time the spiral feeder (204) slowly and orderly pushes the powder through the feed pipe (2) to push the baffle (205) downward, and the baffle (205) pushes the secondary shaft (206) to shift downward; S2: The main scraper (301) slides downward on the outer side of the auxiliary scraper (302) because the length of the auxiliary scraper (302) is the same as the inclined length of the channel (201). At the same time, the main scraper (301) drives the main scraper block (304) to move downward and fit against the upper surface of the semi-circular support plate (303). S3: The auxiliary scraper (5) rotates through the connecting gear (502) to make the auxiliary scraper block (501) come into contact with the upper surface of the semi-circular support plate (303). The auxiliary scraper (5) rotates with the main scraper (301) to make the auxiliary scraper block (501) scrape off the powder adhering to the upper surface of the semi-circular support plate (303). S4: When the auxiliary scraper (5) rotates clockwise or counterclockwise following the main scraper (301), the end of the auxiliary scraper (5) away from the main scraper (301) remains stationary and rotates. The screen block (504) on one side of the auxiliary scraper (5) is embedded in the grid of the screen plate (503) through the slider (505) by the inertial action generated by the rotation of the auxiliary scraper (5), so that one side of the auxiliary scraper (5) is closed and the other side is not closed. S5: The motor (103) drives the main shaft (203) to rotate while the secondary shaft (206) rotates. The rotation of the secondary shaft (206) drives the connecting rod (3) to scrape the powder falling on the inner wall of the channel (201) by the main scraper (304). S6: The powder enters the interior of the auxiliary scraper (5) through the unclosed side of the auxiliary scraper (5). The powder rotates inside the auxiliary scraper (5) and is subjected to centrifugal force. Since one side of the auxiliary scraper (5) is closed, the powder is discharged through the opening on the right side of the auxiliary scraper (5) under the action of centrifugal force. The auxiliary scraper (5) rotates in place at the end away from the main scraper (301), which reduces the throwing force of the powder under the action of centrifugal force. After the powder is discharged, it is located at the center of the semi-circular support plate (303).

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