Quantitative powder feeding device

Abstract

The utility model discloses a powder quantitative feeding device which comprises a feeding hopper and a feeding roller wheel, the feeding roller wheel is rotatably matched in a roller wheel seat, one end of the feeding roller wheel is in transmission connection with an output shaft of a roller wheel motor through a roller wheel shaft, the top of the feeding roller wheel is used for receiving powder falling from a discharging opening of the feeding hopper, and the feeding roller wheel is arranged on the feeding hopper. The bottom of the feeding roller is used for enabling the received powder to fall to a vertical discharging channel and conveying the powder to downstream production equipment; the outer circumference of the feeding roller is in clearance fit with the two arc-shaped inner walls of the roller seat, and a plurality of arc-shaped pits for feeding are distributed in the circumference of the roller in the axial direction and the circumferential direction. According to the feeding device, the dispersity and the uniformity of powder in the quantitative feeding process are relatively good, the quantitative feeding precision can be ensured, the included angle between the center connecting line of each row of arc-shaped pits in the circumference of the feeding roller and the parallel line of the axis of the feeding roller on the circumferential surface of the feeding roller is 20 degrees, and the rows of pits are connected end to end for continuous feeding.

Description

Technical Field

[0001] The utility model relates to the technical field of powder production equipment, in particular to a powder quantitative feeding device. Background Art

[0002] There are many types of powder feeding devices in the prior art, and their structures are different. Among them, the feeding accuracy of roller-type quantitative feeding devices is relatively high.

[0003] However, there is still room for improvement in roller-type quantitative feeding devices. For example, the dispersion and uniformity of some quantitative feeding devices are not enough, which affects the accuracy of quantitative feeding; in some quantitative feeding processes when the roller rotates, it is difficult to ensure the continuity of the feeding state and the stability of the feeding rate; when the powder storage tank on the circumference of some rollers is facing downward, powder still remains in the powder storage tank due to powder stickiness or insufficient self-gravity; the inner wall of some feeding funnels is easily adhered to by powder, which affects the smoothness of feeding. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a powder quantitative feeding device with relatively good dispersion and uniformity of powder in the quantitative feeding process.

[0005] The technical solution of the utility model is to provide a powder quantitative feeding device, including a feed hopper and a feeding roller, wherein the feeding roller is rotatably matched in a roller seat, one end of the feeding roller is transmission-connected to a roller driving mechanism via a roller shaft, the top of the feeding roller is used to receive the powder falling from the discharge port of the feeding funnel, and the bottom of the feeding roller is used to drop the received powder into a vertical discharge channel and transport it to downstream production equipment; the outer circumference of the feeding roller is gap-matched with the two arc-shaped inner walls of the roller seat, and a plurality of arc-shaped pits for feeding are distributed on the circumference of the feeding roller in the axial and circumferential directions.

[0006] After adopting the above structure, the powder quantitative feeding device of the utility model has the following advantages: since the outer circumference of the feeding roller is matched with the gap between the two arc-shaped inner walls of the roller seat, and multiple or several arc-shaped feeding pits are distributed on the circumference of the feeding roller in the axial and circumferential directions, the feeding roller can rotate relative to the two arc-shaped walls, and the powder will not leak from the gap but will be fed by multiple or several arc-shaped feeding pits. The amount of powder fed each time it rotates one circle is the same, especially the quantitative feeding has good dispersion and high uniformity, which ensures the accuracy of quantitative feeding.

[0007] Furthermore, the plurality of arc-shaped pits for feeding are arranged in multiple rows along the circumference, the distances between the rows are equal, and the distances between adjacent arc-shaped pits in each row are equal. With the above structure, the good dispersion and high uniformity of quantitative feeding and the technical effect of ensuring the accuracy of quantitative feeding are further ensured.

[0008] Furthermore, the angle between the center line of each row of arc-shaped pits on the circumference of the feed roller and the parallel line of the feed roller axis on the circumferential surface of the feed roller is 10°-25°, and the pits in the rows are connected end to end for continuous feeding. After adopting the above structure, the pits in the rows are connected end to end for continuous or uninterrupted feeding. In the process of quantitative feeding by the feed roller, the shortcomings of the feed roller in the prior art that the feed roller cannot feed continuously and the feeding rate is unstable are overcome, and the feed state continuity and feeding rate stability are obvious.

[0009] Furthermore, a plurality of elastic paddles corresponding to the number of a row of arc-shaped pits are fixed in the roller seat and used to use elasticity to penetrate into the arc-shaped pits to pry out residual powder when the feeding roller rotates to a row of arc-shaped pits facing downward. After adopting the above structure, the elastic paddles cooperate with the above-mentioned vibrator organically, so that the powder storage tank on the circumference of the feeding roller, such as the powder in the arc-shaped pits for feeding, can be completely separated from the arc-shaped pits when the arc-shaped pits face downward, that is, the phenomenon of residual powder in the arc-shaped pits facing downward is completely avoided.

[0010] Furthermore, each elastic paddle is L-shaped, and the free end of the vertical paddle block at the front end of each L-shaped elastic paddle is in an arc shape that matches the arc surface of the arc pit. With the above structure, it is further ensured that when the arc pit for feeding faces downward, the powder in the arc pit can completely avoid the phenomenon of residual powder in the arc pit directly below.

[0011] Furthermore, one end of the feeding roller away from the roller driving mechanism is connected to a vibrator via the roller shaft. With the above structure, since the vibrator directly vibrates the roller, the powder storage tank on the circumference of the feeding roller, such as the powder in the arc-shaped pit for feeding, can completely escape from the arc-shaped pit when the arc-shaped pit faces downward.

[0012] Furthermore, the arc-shaped pit is a semicircular pit. After adopting the above structure, the technical effect of ensuring good dispersion and high uniformity of quantitative feeding and ensuring the quantitative feeding accuracy is further ensured.

[0013] Furthermore, the roller seat comprises a horizontal rectangular cylinder, the top of the rectangular cylinder is a powder inlet, the bottom of the rectangular cylinder is a powder outlet, the middle of the rectangular cylinder is detachably fixed with respective side plates constituting two arc-shaped inner walls, each end of the rectangular cylinder has a sleeve seat supporting the roller shaft, and each end of the rectangular cylinder has an end plate that is fixed by multiple tie rods and axially limits the sleeve seat and presses the rectangular cylinder. With the above structure, it can ensure that the feeding roller and the two arc-shaped inner walls rotate flexibly and that the matching part does not leak powder, and it also ensures that the feeding and discharging of the roller seat are smooth, and it is also convenient to install elastic paddles, so that the quantitative feeding of powder is smoother, and it is convenient to repair and maintain the roller seat and the feeding roller in the future.

[0014] Furthermore, the feed hopper is a feed funnel, and there is a funnel cover on the top of the feed funnel, and there is a feed pipe on the funnel cover. A stirring drive mechanism is also fixed on the funnel cover, and the output shaft of the stirring drive mechanism is connected to a stirring shaft in a transmission manner. The stirring shaft is coaxial with the feed funnel, and a stirring frame is fixed on the stirring shaft, the edge of which is matched with the inner wall gap of the feed funnel and is used to scrape the powder on the inner wall of the feed funnel. The lower part of the stirring shaft also has multiple groups of blades arranged along the circumference and used to push the powder down to the top of the feeding roller. After adopting the above structure, the powder is effectively prevented from sticking to the inner wall of the feed funnel, and the powder is continuously pushed down to the top of the feeding roller, which effectively ensures the smoothness of the feed of the feed funnel, making the quantitative feeding of the powder smoother.

[0015] Furthermore, the discharge channel includes a discharge funnel for receiving the powder falling from the bottom of the feeding roller. With the above structure, the unimpeded discharge of the discharge funnel is effectively guaranteed, making the quantitative feeding of powder smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the powder quantitative feeding device of the utility model.

[0017] Figure 2 yes Figure 1 The three-dimensional structure diagram of the mounting frame is omitted Figure 1 .

[0018] Figure 3 yes Figure 1 The three-dimensional structure diagram of the mounting frame is omitted Figure 2 .

[0019] Figure 4 yes Figure 3 Schematic diagram of the explosion structure Figure 1 .

[0020] Figure 5 yes Figure 3 Schematic diagram of the explosion structure Figure 2 .

[0021] Figure 6 yes Figure 3 Schematic diagram of the exploded structure with some components omitted.

[0022] Figure 7 yes Figure 3 Schematic diagram of the structure when the middle elastic paddle cooperates with the feed roller (viewed from above).

[0023] As shown in the figure:

[0024] 1. Feed funnel assembly, 11. Feed funnel, 111. Feeding port, 12. Funnel cover, 13. Feeding pipe, 14. Stirring motor, 15. Stirring shaft, 16. Stirring frame, 161. Stirring scraper, 17. Blade, 18. Stirring motor bracket;

[0025] 2. Feeding roller structure, 21. Feeding roller, 211. Roller shaft, 2111. Large diameter journal, 2112. Small diameter journal, 212. Semicircular pit, 22. Roller seat, 221. Side plate, 2211. Arc inner wall, 222. Rectangular cylinder, 2221. Powder inlet, 2222. Powder outlet, 2223. Circular ring plate with square hole, 23. Roller motor, 24. Vibrator, 25. Elastic pick, 251. Long side, 252. Short side, 26. Bearing, 27. Bushing seat, 271. Circular shaft hole, 28. Pull rod, 281. Threaded sleeve, 29. End plate, 291. Circular hole;

[0026] 3. Discharge channel, 31. Large discharge funnel, 32. Small discharge funnel;

[0027] 4. Mounting frame;

[0028] 5. Connecting pipe. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these specific embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various specific embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown.

[0031] The quantitative powder feeding device of the present invention comprises a feed hopper and a feed roller 21 arranged horizontally. The feed hopper can be a feed funnel 11 with a cylindrical top and a conical bottom. The feed hopper can be arranged obliquely, and the feed is fed by a stirring device, a propulsion device, etc. Of course, the feed hopper is preferably a feed funnel 11 arranged vertically or vertically, and the feed is fed by gravity. The feed roller 21 is generally arranged horizontally, and can also be arranged horizontally but not completely horizontally. Of course, it is preferred that the feed roller 21 is arranged horizontally. The feed roller 21 is rotatably matched in the roller seat 22, and one end of the feed roller 21 is connected to the roller drive mechanism through the roller shaft 211. It is not difficult to understand that the roller drive mechanism generally adopts an electric motor or a motor, which can be a roller shaft 211 extending from the outer end of the roller seat 22 and the motor shaft through a transmission belt or a gear box, but it is preferred that one end of the feed roller 21 is coaxially connected to the shaft of the roller motor 23 through the roller shaft 211. Of course, the roller drive mechanism can also be a pneumatic motor or a hydraulic motor, etc. The output shaft of the pneumatic motor or the output shaft of the hydraulic motor can be connected to one end of the roller shaft via a transmission belt or a gear box, or one end of the feeding roller is coaxially connected to the output shaft of the pneumatic motor or the output shaft of the hydraulic motor via the roller shaft. The top of the feeding roller 21 is used to receive the powder falling from the discharge port 111 of the feed hopper 11, and the bottom of the feeding roller 21 is used to drop the received powder to the vertical discharge channel 3 and transport it to the downstream production equipment. The last two sentences above can also be expressed as follows: the top of the feeding roller 21 is used to communicate with the discharge port 111 of the feed hopper 11, and the bottom of the feeding roller 21 is used to communicate with the vertical discharge channel 3. It is not difficult to understand that the feeding roller 21 is coaxial with the roller shaft 211 at both ends, or is called coaxial fixation.

[0032] The outer circumference of the feeding roller 21 is gap-matched with the two arc-shaped inner walls 2211 of the roller seat 22, and a plurality of arc-shaped pits for feeding are distributed along the axial and circumferential directions on the circumference of the feeding roller 21, such as the following semicircular pits for feeding 212. The plurality of such as dozens, hundreds, hundreds, etc., can also be called a plurality.

[0033] One end of the feeding roller 21 away from the roller motor 23 is connected to a vibrator 24 via a roller shaft 211. The vibrator 24 can be a commercially available electric vibrator, a commercially available electromagnetic vibrator, a commercially available pneumatic vibrator, and the like.

[0034] The plurality of arc-shaped pits for feeding, such as the semicircular pits 212 described below, are arranged in a plurality of rows along the circumference, and the distances between rows may be equal, and the distances between adjacent arc-shaped pits, such as the semicircular pits 212 in each row may be equal.

[0035] The angle between the center line of each row of arc-shaped pits on the circumference of the feed roller 21, such as the center line of the semicircular pits 212 described below, and the parallel line of the feed roller axis on the circumferential surface of the feed roller is preferably 10°-25°.

[0036] A plurality of elastic paddles 25 are fixed in the roller seat 22, which correspond to the number of a row of arc-shaped pits such as semicircular pits 212, and are used to elastically penetrate into the arc-shaped pits such as semicircular pits 212 to pry out residual powder when the feeding roller 21 rotates to a row of arc-shaped pits such as semicircular pits 212 facing downward.

[0037] Each elastic paddle 25 is preferably L-shaped, and the shape of the free end of the vertical paddle block, i.e. the short side 252, at the front end of each L-shaped elastic paddle 25 is preferably an arc that matches the arc surface of the arc-shaped pit, such as a semicircle that matches the semicircular surface of the semicircular pit 212.

[0038] The arc-shaped pit is preferably a semicircular pit 212. The semicircular pit 212 is also called a semicircular powder storage tank.

[0039] The roller seat 22 includes a horizontal rectangular cylinder 222, the top of the rectangular cylinder 222 is a powder inlet 2221, the bottom of the rectangular cylinder 222 is a powder outlet 2222, and the middle of the rectangular cylinder 222 is detachably fixed with side plates 221 constituting two arc-shaped inner walls 221, and both ends of the rectangular cylinder 222 are respectively provided with a sleeve seat 27 supporting the roller shaft 211, and both ends of the rectangular cylinder 222 are respectively provided with an end plate 29 which is fastened by multiple, such as four, tie rods 28 and axially limits the sleeve seat 27 and presses the rectangular cylinder 222.

[0040] Preferably, the top of the feed funnel 11 in the feed funnel assembly 1 has a funnel cover 12, a feed pipe 13 is arranged on the funnel cover 12, and a stirring drive mechanism is also fixed on the funnel cover 12. It is not difficult to understand that the stirring drive mechanism generally adopts an electric motor or a motor, which can be the upwardly extending end of the stirring shaft 15 and the motor shaft through a transmission belt or a gear box, but preferably the output shaft of the stirring motor 14 is coaxially connected with a stirring shaft 15. Of course, the stirring drive mechanism can also be an air motor or a hydraulic motor, and the output shaft of the air motor or the output shaft of the hydraulic motor can be connected to the upwardly extending end of the stirring shaft through a transmission belt or a gear box, or the upwardly extending end of the stirring shaft is coaxially connected with the output shaft of the air motor or the output shaft of the hydraulic motor. A stirring frame 16 whose edge is matched with the inner wall gap of the feed funnel 11 and is used to scrape the powder on the inner wall of the feed funnel 11 is fixed on the stirring shaft 15, and the lower part of the stirring shaft 15 also has a plurality of blades 17 arranged along the circumference and used to push the powder downward to the top of the feeding roller 21.

[0041] The discharging channel 3 preferably includes a discharging funnel for receiving the powder falling from the bottom of the feeding roller 21 .

[0042] The following is a supplementary description of the above content.

[0043] The powder quantitative feeding device of the utility model can also be called a powder quantitative feeder. It includes a feeding funnel assembly 1, or a feeding structure. It also includes a feeding roller structure 2, and the feeding roller 21 in the feeding roller structure 2 can also be called a drum, or a roller. It also includes a vertical discharge channel 3. The feeding funnel 11 in the feeding funnel assembly 1 is communicated with the top of the roller seat 22, and the roller seat 22 is communicated with the vertical discharge channel 3 such as the top of the large discharge funnel 31 in the discharge funnel. The feeding funnel 1 is specifically that the feeding funnel 11 and the roller seat 22 are detachably fixed and sealed, and the roller seat 22 and the vertical discharge channel 3 such as the top of the large discharge funnel 31 in the discharge funnel are detachably fixed and sealed, and the detachable fixing is also called a detachable connection, such as fixing with flanges and bolts and nuts, and the sealing is such as sealing with a sealing ring. The feed funnel assembly 1 , the roller seat 22 and the discharge funnel 3 are all mounted on the mounting frame 4 .

[0044] The feeding funnel assembly 1 is also called a feeding structure, and may include a funnel cover 12, a stirring motor bracket 18, a stirring motor 14, a feeding pipe 13 mounted on the funnel cover 12, a feeding funnel 11, a stirring shaft 15, a stirring frame 16, a coupling, a bearing and a bearing seat. The stirring shaft 15 is also called a rotating shaft. The stirring motor 14 is mounted on the stirring motor bracket 18, and the stirring motor bracket 18 is fixed on the funnel cover 12 or the hopper cover by welding or screwing, and the funnel cover 12 is connected to the top surface of the feeding funnel 11 through bolts, nuts and sealing rings. The coupling is also called a coupling. The bearing seat is mounted on the funnel cover 12, and the bearing seat is interference fit with the outer ring of the bearing, and the inner ring of the bearing is interference fit with the output shaft of the stirring motor 14, so that the output shaft of the stirring motor 14 can rotate more flexibly and with better concentricity relative to the bearing seat. It is not difficult to understand that the axis of the output shaft of the stirring motor 14 and the axis of the rotor and stator of the stirring motor 14 are 90° to each other. One end of the coupling is connected to the output shaft of the stirring motor 14, and the other end is connected to the stirring shaft 15 by reverse thread connection or key connection. The stirring shaft 15 is also called a stirring rod, and the frame of the stirring frame 16 is also called a stirring scraper 161. The lower part of the stirring shaft 15 also has multiple groups, such as three groups of blades 17 arranged along the circumference and used to push the powder downward to the top of the feeding roller 21. The multiple groups of blades 17 can also be called three-stage spiral blades, and each group of blades 17 has multiple blades, such as four blades 17, distributed along the circumference of the stirring shaft 15. During the rotation of the output shaft of the stirring motor 15, the coupling is driven to rotate, and then the stirring shaft 15 is driven to rotate through the coupling, and then the stirring frame 16 is driven to rotate, so that the powder such as ultrafine powder material does not adhere to the inner wall or side wall of the feeding funnel 11, thereby solving the problem of blockage and accumulation of powder such as ultrafine powder material in the feeding funnel 1, specifically the feeding funnel 11; multiple groups of blades 17 or three-stage spiral blades rotate with the stirring shaft 15, giving the powder such as ultrafine powder material a downward thrust, and can transport the powder from the feeding funnel 1, specifically the bottom discharge port 111 of the feeding 11, to the feeding roller 21.

[0045] The feeding roller structure 2 can be called a feeding drum structure or a feeding roller structure. The feeding roller structure 2 includes a roller motor 23, a roller seat 22, a feeding roller 21, a plurality of elastic paddles 25, a vibrator 24 such as an electric vibrator, etc. The roller motor 23 is mounted on the mounting frame 4. The vibrator 24 is connected to the end face of the roller shaft 211 away from the roller motor 23 by screws, for example. A plurality of elastic paddles 25 or a group of elastic paddles 25 are provided at the lower part of the roller seat 22. It is not difficult to understand that a sealing shaft seal is provided between the roller shaft 211 and the shaft hole of the roller seat 22.

[0046] The roller seat 22 comprises a horizontal rectangular cylinder 222, the top of the rectangular cylinder 222 is a powder inlet 2221, the bottom of the rectangular cylinder 222 is a powder outlet 2222, the middle of the rectangular cylinder 222 is detachably fixed with side plates 221 constituting two arc-shaped inner walls 2211, such as by screwing, and the two ends of the rectangular cylinder 222 each have a sleeve seat 27 with a circular shaft hole 271 supporting the large-diameter shaft neck 2111 of the roller shaft 211, and the cylindrical large-diameter shaft neck 2111 of the roller shaft 211 is rotatably matched with the circular shaft hole 271 of the sleeve seat 27. The two ends of the rectangular cylinder 222 each have an end plate 29 that is fastened by multiple, such as four, tie rods 28 and axially limits the two sleeve seats 27 and presses the rectangular cylinder 222. The sleeve seat 27 with the circular shaft hole 271 can also be called a bearing seat. Both ends of the pull rod 28 may be positive and negative external threads, and both ends may be screwed together with positive and negative threaded sleeves 281 to be tightened. The positive and negative threaded sleeves 281 at both ends may be fixed to the threaded sleeve holes of the end plate 29, such as by welding. The positive and negative threaded sleeves 281 are one positive threaded sleeve 281 and the other negative threaded sleeve 281. It is not difficult to understand that the space between the tops of the two side panels 221 constitutes a powder inlet, and the space between the bottoms of the two side panels 221 constitutes a powder outlet or a blanking port. Of the two side panels 221, one may be integral, and the other may also be integral. The multiple elastic paddles 25 may be fixed to the other side panel 221, such as by welding or screwing with screws, and grooves for fixing the multiple elastic paddles may also be reserved at the lower part of the other side panel 221. Of course, it is also possible as Figure 6 , Figure 7 As shown, the other side panel 221 can be divided into an upper side panel 221 and a lower side panel 221 , both of which are fixed to the rectangular cylinder 222 by screws, and the top of the lower side panel 221 is fixed to the inner end of the long side 251 of multiple L-shaped elastic paddles 25 by multiple screws.

[0047] The end plate 29 can also be called the end cover of the cylinder. As mentioned above, the end plate 29 is fixed to the two end faces of the rectangular cylinder 222 by multiple horizontal tie rods 28, such as four. The two ends of the rectangular cylinder 222 can be circular ring plates 2223 with square holes inside to increase the clamping area. When the internal parts fail, the end plate 29 can be disassembled for maintenance. The two side plates 221 constituting the two arc-shaped inner walls 2211 can be made of wear-resistant materials such as tool steel or ceramics to be durable and increase the service life. The two arc-shaped inner walls 2211 or two semicircular inner walls can also be regarded as two semicircular scrapers. The feed roller 21 and the arc-shaped inner walls 2211 of the two side plates 221 have a clearance fit, that is, a rotation fit, and the inner end walls of the two sleeve seats 27 and the two end faces of the feed roller 21 have a clearance fit, that is, a rotation fit. It is easy to understand that no powder will leak between the upper semicircular surface of the feed roller 21 and the two arc-shaped inner walls 2211 or the two semicircular inner walls, and no powder will leak between the two end surfaces of the feed roller 21 and the inner end walls of the two shaft sleeve seats 27.

[0048] The bearing 26 is installed in the end plate 29 with a circular hole 291 at the center. The bearing 26 is rotatably matched with the small-diameter journal 2112 of the roller shaft 211 at both ends of the feed roller 21, that is, the inner rings of the two bearings 26 are interference-fitted with the small-diameter journal 2112 of the roller shaft 211, and the outer rings of the two bearings 26 are interference-fitted with the inner wall of the circular hole 291 at the center of the end plate 29. The bearing 26 is also called a rolling bearing. The circular hole 291 can also be called a circular shaft hole.

[0049] As described above, the circumference or circumferential surface of the feed roller 21 is provided with a plurality of arc-shaped feeding pits distributed along the axial and circumferential directions. For example, the circumferential surface of the feed roller 21 is evenly covered with semicircular pits 212 or semicircular powder storage tanks, which are also called hemispherical powder storage tanks.

[0050] One end of the feed roller 21 is coaxially connected to the roller motor 23 via the roller shaft 211 of the feed roller 21 , and the other end is connected to the vibrator 24 via the roller shaft 211 of the feed roller 21 . During the rotation of the roller motor 23, the roller motor 23 drives the feeding roller 21 to rotate at a uniform speed, and the feeding funnel 1 conveys the powder, such as ultrafine powder material, to the top of the feeding roller 21 and fills all the arc-shaped pits for feeding, such as the semicircular pits 212. The material in the semicircular pits 212 passes through the feeding roller 21 and rotates to the lower part of the feeding roller 21 with the semicircular pits 212 facing downward. At this time, the opening of the surface of the feeding roller 21, such as the semicircular pits 212, touches a plurality of elastic paddles 25 corresponding to a row of arc-shaped pits, such as the semicircular pits 212, and the short piece 252 of each L-shaped elastic paddle 25 extends into the corresponding arc-shaped pits, such as the semicircular pits 212. With the cooperation of the vibration of the vibrator 24, the end of the free end of the elastic paddle 25 pries out the powder material remaining in the arc-shaped pits, such as the semicircular pits 212. It is not difficult to understand that, because as mentioned above, it is preferred that the center line of each row of arc-shaped pits, such as the center line of the semicircular pit 212, and the parallel line of the axis of the feed roller 21 on the circumferential surface of the feed roller 21 have an angle of 15°-25°, so each elastic paddle 25 can have two ways of prying: one is that the long sides 251 of the L-shaped elastic paddles 25 in a row are equal in length as shown in the figure, and each elastic paddle 25 successively enters a row of arc-shaped pits, such as the semicircular pit 212, during the rotation of the feed roller 21. Internal material selection; the other is that the lengths of the long sides 251 of the L-shape of a row of elastic paddles 25 are different, and the lengths of the long sides 251 of the L-shape of each elastic paddle 25 are matched with a row of arc-shaped pits arranged at an angle, such as semicircular pits 212. When the material in the semicircular pits 212 passes through the feeding roller 21 and rotates to the lower part of the feeding roller 21 and the arc-shaped pits, such as the semicircular pits 212, face downward, multiple elastic paddles 25 simultaneously enter a row of arc-shaped pits, such as the semicircular pits 212, to select the material. The long side 251 of the L-shaped elastic paddle 25 can also be called a long piece, and the short side 252 of the L-shaped elastic paddle 25 can also be called a short piece. It is not difficult to understand that the volume of each arc-shaped pit, such as each semicircular pit, in the multiple or several arc-shaped pits of the feeding roller 21 is equal and constant, and precise quantitative feeding can be achieved by controlling the rotation speed of the roller motor 23, such as the input frequency.

[0051] The feed roller 21 and the arc-shaped pits such as the semicircular pits 212 can be of the following specific sizes: the feed roller 21 can have a diameter of 100 mm; each semicircular pit 212 can have a diameter of 12 mm and a depth of 6 mm. The arc-shaped pits such as the semicircular pits 212 can be distributed in 16 rows along the circumference of the feed roller, and each row can have 8 arc-shaped pits such as the semicircular pits 212. The angle between the center line of each row of arc-shaped pits on the circumference of the feed roller 21, such as the center line of the semicircular pits 212, and the parallel line of the feed roller axis on the circumference of the feed roller can be 20°.

[0052] Of course, the diameter of the feed roller can also be other sizes, and the sizes of the side plates of the two arc-shaped inner walls matched therewith can also be adjusted accordingly. In particular, different quantitative feeding can be achieved by controlling the input frequency of the roller motor to change its rotation speed, and different quantitative feeding can be achieved by changing the diameter and depth of arc-shaped pits such as semicircular pits, and different quantitative feeding can be achieved by changing the number of rows of arc-shaped pits such as semicircular pits distributed circumferentially along the circumferential surface of the feed roller and the number of semicircular pits in each row.

[0053] The powder inlet 2221 at the top of the roller seat 22 can be a circular powder inlet 2221, and the circular powder inlet 2221 and the circular discharge port 111 of the discharge funnel body 11 of the discharge funnel 1, also known as the powder discharge port, can be connected by a connecting pipe 5 or a connecting pipe joint through a flange and a bolt nut (not shown in the figure). The powder discharge port 2222 at the bottom of the roller seat 22 can be a waist-shaped powder discharge port 2222, and the discharge channel 3 immediately following the waist-shaped powder discharge port 2222 can adopt a discharge funnel, and the top of the discharge funnel can be connected to the bottom plate of the rectangular cylinder 222 of the roller seat 22 by screws and provided with a sealing ring. In order to discharge materials more quickly, the discharge funnel can adopt the following structure: the lower end of the large discharge funnel 31 can also be connected to a small discharge funnel 32 (the flange connected to the flange of the small discharge funnel 32 and the transition pipe connected to the downstream production equipment are not shown in the figure).

[0054] It is not difficult to understand that the funnel is a conical funnel that is larger at the top and smaller at the bottom. The coaxial connection and coaxial line mentioned above have the same meaning.

[0055] It is not difficult to understand that the powder quantitative feeding device of the utility model can also include a controller, such as a PLC control cabinet, which can be installed on a mounting frame, the PLC control cabinet power supply is connected to an external power supply, the PLC control cabinet is electrically connected to a roller motor, a stirring motor and an electric vibrator, and can control the speed of each motor and the time of the electric vibrator.

[0056] The operation process of the powder quantitative feeding device of the utility model is roughly as follows:

[0057] Turn on the power of the PLC control cabinet, set the input frequency of the stirring motor 14 and the roller motor 23 and the vibration time of the vibrator 24, such as an electric vibrator, in the human-machine interface, such as setting the input frequency of the stirring motor 14 to 30 Hz, the input frequency of the roller motor 23 to 15 Hz, the vibration time interval of the electric vibrator to 2-3 seconds, and each vibration lasts for 5 seconds. Feed the silicon powder into the feeding hopper 11, the stirring motor 14 drives the stirring shaft 15 to drive the stirring frame 16 and the multiple sets of blades 17 to rotate, the silicon powder is stirred by the stirring frame 16 and flows downward along the inner wall of the feeding hopper 11, reaches the lower part of the feeding hopper 11, and is pressed into the multiple or several arc-shaped pits, such as the semicircular pits 212, on the top of the feeding roller 21 by the multiple sets of blades 17, the roller motor 23 drives the feeding roller 21 to rotate, and during the rotation, the arc-shaped inner wall 2211 of the side plate 221 of the roller seat 22 is closely connected to the silicon powder. The top surface of the semicircular pit 212 is sealed, and the silicon powder in the semicircular pit 212 moves from the top of the feeding roller 21 to the bottom. Most of the powder falls under its own weight. At this time, the opening of the downward semicircular pit 212 touches the respective elastic paddles 25. The elastic paddles 25, in cooperation with the electric vibrator, pry out or vibrate out or vibrate and pry out at the same time the residual silicon powder in the semicircular pit 212. Then, the silicon powder flows through the discharge funnel 3 and the transition pipe to the downstream production equipment or the lower equipment. Repeat this cycle to complete the quantitative feeding of the powder.

[0058] The utility model is further described below in conjunction with the contents of the following table:

[0059]

[0060] In each embodiment and comparative example of the utility model, the feeding rate is adjusted by controlling the input frequency of the roller motor to change its rotation speed. Among them, embodiments 1-4 adopt the feeding device scheme of the utility model, and comparative example 1 adopts the grooved roller feeding device commonly used in the prior art.

[0061] From the effects of the above-mentioned embodiments 1-4 and the comparative example, it can be seen that within 5 consecutive time periods, the fluctuation of the utility model is relatively small, while the fluctuation of the comparative example is relatively large. The utility model has a significant improvement in the continuity of the feeding state and the stability of the feeding rate compared to the prior art, and will not produce the feeding rate interval change phenomenon caused by the transportation dead zone between the roller troughs. It is particularly suitable for occasions in which the feed amount is relatively low in the industrial production process and the continuous feeding stability and precision are required at the same time, such as the physical vapor phase preparation process of nano-level ultrafine powder and the ion spraying process.

[0062] The above unmarked parts, structures or quantities are not shown in the figures; some parts are not marked. The drawings are only for reference. If there is any inconsistency between the drawings and the text description or between the drawings, the text description shall prevail.

[0063] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A powder quantitative feeding device, comprising a feed hopper and a feed roller, wherein the feed roller is rotatably fitted in a roller seat, one end of the feed roller is transmission-connected to a roller drive mechanism via a roller shaft, the top of the feed roller is used to receive the powder falling from the discharge port of the feed hopper, and the bottom of the feed roller is used to drop the received powder into a vertical discharge channel and transport it to downstream production equipment; characterized in that: The outer circumference of the feeding roller is gap-matched with the two arc-shaped inner walls of the roller seat, and a plurality of arc-shaped pits for feeding are distributed on the circumference of the feeding roller in the axial direction and the circumferential direction.

2. The powder quantitative feeding device according to claim 1, characterized in that: The plurality of arc-shaped pits for feeding are arranged in a plurality of rows along a circumference, the distances between the rows are equal, and the distances between adjacent arc-shaped pits in each row are equal.

3. The powder quantitative feeding device according to claim 2, characterized in that: The angle between the center line of each row of arc-shaped pits on the circumference of the feed roller and the parallel line of the feed roller axis on the circumferential surface of the feed roller is 10°-25°, and the pits in rows are connected end to end to continuously feed.

4. The powder quantitative feeding device according to claim 3, characterized in that: A plurality of elastic paddles corresponding to the number of each row of arc-shaped pits are fixed in the roller seat and are used to elastically penetrate into the arc-shaped pits to pry out residual powder when the feeding roller rotates to a row of arc-shaped pits facing downward.

5. The powder quantitative feeding device according to claim 4, characterized in that: Each elastic paddle is L-shaped, and the free end of the vertical paddle block at the front end of each L-shaped elastic paddle is in an arc shape that matches the arc surface of the arc-shaped pit.

6. The powder quantitative feeding device according to claim 1, characterized in that: One end of the feeding roller away from the roller driving mechanism is connected to a vibrator via the roller shaft.

7. The powder quantitative feeding device according to any one of claims 1 to 6, characterized in that: The arc-shaped pit is a semicircular pit.

8. The powder quantitative feeding device according to claim 1, characterized in that: The roller seat includes a horizontal rectangular cylinder, the top of the rectangular cylinder is a powder inlet, the bottom of the rectangular cylinder is a powder outlet, and the middle of the rectangular cylinder is detachably fixed with side panels forming two arc-shaped inner walls. There is a sleeve seat supporting the roller shaft at each end of the rectangular cylinder, and there is an end plate at each end of the rectangular cylinder that is fastened by multiple tie rods to limit the axial position of the sleeve seat and press the rectangular cylinder.

9. The powder quantitative feeding device according to claim 1, characterized in that: The feed hopper is a feed funnel, and a funnel cover is provided on the top of the feed funnel, and a feed pipe is provided on the funnel cover. A stirring drive mechanism is also fixed on the funnel cover, and an output shaft of the stirring drive mechanism is coaxially connected with a stirring shaft, and the stirring shaft is coaxial with the feed funnel. A stirring frame is fixed on the stirring shaft, and the edge thereof matches the clearance between the inner wall of the feed funnel and is used for scraping the powder on the inner wall of the feed funnel. There are also a plurality of sets of blades arranged along the circumference at the bottom of the stirring shaft and are used for pushing the powder downward to the top of the feeding roller.

10. The powder quantitative feeding device according to claim 1, characterized in that: The discharging channel comprises a discharging funnel for receiving the powder falling from the bottom of the feeding roller.

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