Accurate powder batching device for food production and processing

Abstract

The invention belongs to the technical field of food production and processing, and particularly relates to a precise powder batching device for food production and processing, which comprises a stirring barrel, a sealing cover is mounted at the top of the stirring barrel, a feed hopper communicated with an inner cavity of the stirring barrel is embedded in the top of the sealing cover, a discharge pipe is arranged right below the bottom end of the stirring barrel, and the discharge pipe is connected with the stirring barrel. Supporting plates which are connected with each other are fixedly connected to one side, opposite to the discharging pipe, of the bottom end of the stirring barrel; a stirring mechanism for stirring powder is arranged in the stirring barrel, the stirring mechanism comprises a first motor fixedly mounted at the top of the sealing cover, and the bottom end of an output shaft of the first motor penetrates through the stirring barrel and is fixedly connected with a rotating rod. Furthermore, the effects of further prolonging the powder mixing time and the mutual collision diffusion frequency of different powder materials are achieved, so that the powder materials which are continuously flapped, impacted and rotationally raised are mixed more uniformly.

Description

Technical Field

[0001] This invention belongs to the field of food production and processing technology, specifically a precise powder dispensing device for food production and processing. Background Technology

[0002] In the food production and processing industry, the uniformity of powder ingredients directly determines the quality stability, taste consistency, and nutritional balance of the final product, making it one of the key processes in food processing. With the food industry's ever-increasing demands for product quality and the growing need for efficient ingredient dispensing in large-scale production, precision dispensing devices are being used more and more widely in food processing production lines.

[0003] Existing precision powder dispensing devices for food production and processing primarily operate by controlling the output ratio of different types of powders through a metering mechanism. These powders are then introduced into the same drop channel, relying on their own gravity and a simple stirring structure to achieve simultaneous dispensing and mixing. The mixed powder is then transported to subsequent processing steps. However, in practical applications, these devices generally suffer from poor mixing uniformity, failing to meet the requirements of high-quality food production. Significant differences in bulk density, particle size, viscosity, and flowability among different types of food powders (such as flour, milk powder, starch, and protein powder) lead to large variations in their falling states, easily resulting in stratified accumulation. This stratification exhibits a pattern of "faster powders falling first, slower powders falling later, lumps concentrated, and fine powders dispersed," causing some powders with high falling speeds and extremely short dwell times to fail to fully collide and diffuse with other powder particles, resulting in low mixing efficiency between different powders.

[0004] Existing precise powder mixing devices for food production and processing suffer from significant differences in the falling state of different powders when mixing them. This can easily lead to stratification and accumulation, making it difficult for some powders with high falling speed and extremely short dwell time to fully collide and diffuse with other powder particles, resulting in low mixing efficiency between different powders. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a precise powder mixing device for food production and processing. This invention primarily addresses the problem that existing precise powder mixing devices for food production and processing suffer from significant differences in the falling states of different powders when mixing them, leading to stratification and accumulation. This results in some powders with high falling speeds and extremely short dwell times failing to fully collide and diffuse with other powder particles, causing low mixing efficiency between different powders.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a precise powder dispensing device for food production and processing, comprising: a mixing drum, a sealing cover installed on the top of the mixing drum, and a feeding hopper connected to the inner cavity of the mixing drum embedded in the top of the sealing cover; a discharge pipe provided directly below the bottom of the mixing drum, and support plates fixedly connected to each other on the opposite side of the bottom of the mixing drum and the discharge pipe; a mixing mechanism for mixing powder is provided inside the mixing drum, the mixing mechanism including a first motor fixedly installed on the top of the sealing cover, the bottom end of the output shaft of the first motor penetrating the mixing drum and fixedly connected to a rotating rod, and a spiral plate adapted to the contour of the bottom inner cavity of the mixing drum and a plurality of upwardly inclined mixing plates fixedly connected to the rod body of the rotating rod, the spiral plate being located below the mixing plate and the spiral plate being spirally upward; A feeding mechanism for introducing different powders is fixed through the arc-shaped outer wall near the top of the mixing drum, and a discharge mechanism for discharging the mixed powders is provided at the bottom of the mixing drum.

[0007] Furthermore, a vibrating cylinder is slidably connected to the inner wall of the mixing cylinder near the sealing cover, and multiple evenly arranged discharge holes are opened at the bottom of the vibrating cylinder. The rotating rod passes through the center of the vibrating cylinder and is slidably connected to the vibrating cylinder. Multiple evenly distributed protrusions are provided on the lower surface of the vibrating cylinder. An impact shaft is provided below the protrusions and is fixedly connected to the rotating rod. The lowest point of the protrusion is located between the central axis and the apex of the impact shaft.

[0008] Furthermore, a protective cover is fixedly connected to the bottom of the sealing cover, and a limiting sleeve is inserted into the bottom of the protective cover. The bottom end of the limiting sleeve is fixedly connected to the bottom of the inner wall of the vibrating cylinder. The limiting sleeve is sleeved on the rotating rod and is slidably connected to the rotating rod. A connecting plate is fixedly connected to the top end of the limiting sleeve located inside the protective cover. Multiple evenly distributed guide shafts are fixedly connected to the connecting plate and the opposite side of the inner wall of the sealing cover. A gap of 3-5cm is provided between two corresponding upper and lower guide shafts. A second spring is inserted into the two corresponding upper and lower guide shafts. The upper and lower ends of the second spring are fixedly connected to the connecting plate and the opposite side of the sealing cover, respectively.

[0009] Furthermore, multiple evenly distributed material distribution blocks are fixedly connected to the bottom of the inner wall of the vibrating cylinder.

[0010] Furthermore, the feeding mechanism includes a guide pipe that penetrates and is fixed to the arc-shaped side wall of the mixing drum. A mounting plate is fixedly connected to the end of the guide pipe away from the mixing drum, and a second motor is fixedly mounted on the mounting plate. A spiral conveying rod is rotatably connected inside the guide pipe, and the outer spiral wall of the spiral conveying rod is in close contact with the inner wall of the guide pipe. The end of the spiral conveying rod's central axis away from the rotating rod penetrates the mounting plate and is fixedly connected to the end of the output shaft of the second motor. Multiple evenly distributed mounting seats are fixedly connected to the top of the guide pipe, and a powder bottle is provided on the top of each mounting seat. The top of the tube and the center of multiple mounting bases are all provided with interconnected vertical through holes, and the two vertical through holes at the top and bottom are of the same diameter. The bottom end of the powder bottle is inserted into the vertical through hole on the mounting base. The side wall of the mounting base is provided with a horizontal groove that matches the through hole, and a pull plate for sealing the through hole is slidably connected in the horizontal groove. The upper surface of the pull plate is provided with a gap of 4-8mm between it and the lower surface of the powder bottle mouth. The bottom of the powder bottle is fitted with an annular pressure sensor, and the annular pressure sensor is electrically connected to an external controller. The lower surface of the annular pressure sensor is fixedly connected to the upper surface of the mounting base.

[0011] Furthermore, the end of the spiral conveyor rod away from the second motor extends towards the rotating rod to the outside of the guide tube, and a throwing disc is provided below the end of the guide tube away from the second motor, with the center of the throwing disc penetrating and fixed to the rotating rod.

[0012] Furthermore, the upper surface of the material feeding disc is fixedly connected with multiple evenly distributed fixing strips.

[0013] Furthermore, the stirring plate has two sliding grooves, and sliding rods are slidably connected within the grooves. A first spring is fixedly connected to both the sliding rods and the inner wall of the grooves. A scraper is fixedly connected to the ends of the two sliding rods away from the first spring. An installation groove is provided on the scraper, and a scraper strip is locked and fixed within the installation groove. A limiting groove is provided in the stirring plate, and the limiting groove is connected to the sliding groove. A slider is slidably connected within the limiting groove, and a spring wire is fixedly connected to the end of the slider away from the groove. An installation block is fixedly connected to the end of the spring wire away from the slider, and the installation block is fixedly connected to the outer wall of the stirring plate. A slot adapted to the size of the slider is provided on the sliding rod adjacent to the limiting groove, and the slot is locked with the end of the slider.

[0014] Furthermore, the scraper is made of a smooth rubber material.

[0015] Furthermore, the unloading mechanism includes a first electric push rod fixedly connected between two support plates. A blocking plate is fixedly connected to the end of the output shaft of the first electric push rod, and the upper and lower surfaces of the blocking plate are respectively attached to the opposite side of the two support plates. A rectangular groove is opened in the blocking plate, and a support block for sealing the rectangular groove is inserted into the rectangular groove. The end of the support block away from the blocking plate is fixedly connected to the support plate located below. A rotating groove is opened on the top of the support block, and the bottom of the inner wall of the rotating groove is attached to the bottom end of the rotating rod.

[0016] The beneficial effects of this invention are as follows: 1. In this invention, due to the significant differences in the falling states of different powders, they are prone to stratification and accumulation. This makes it difficult for powders with slower falling speeds to collide and diffuse sufficiently with those with faster falling speeds, resulting in problems with mixing uniformity. To extend the mixing time of the powders in the mixing drum, improve the collision and diffusion effect between different powders, and enhance the uniformity of mixing, the first motor in the mixing mechanism needs to be started first, and the output shaft of the first motor drives the rotating rod to rotate. The rotating rod then drives the spiral plate and the mixing plate to rotate. As the powders enter the mixing drum through the feeding hopper and feeding mechanism and fall downwards, the multiple mixing plates, which continuously rotate with the rotating rod, impact the falling powders, causing them to disperse more evenly during their fall. The mixing process is highly uniform. The upward tilt of the mixing plate causes the powder to be propelled upwards and thrown up upon impact, extending the powder's falling speed and time within the mixing drum. This allows for more even mixing of powders of varying proportions during the fall. Simultaneously, the spiral plate below, with its upward spiral structure, lifts any powder that falls onto its surface back up, subjecting it to further impact from the mixing plate. This combined action of the mixing plate and spiral plate further extends the mixing time and increases the frequency of collisions and diffusion between different powders, resulting in a more uniform mixture after continuous impact and rotation.

[0017] 2. In this invention, since the impact shaft rotates horizontally following the rotating rod, when it pushes the protrusion upward, in addition to the upward thrust, there is also a circumferential thrust. This circumferential thrust causes the protrusion and the vibrating cylinder to rotate horizontally during the upward movement. During this process, the vibrating cylinder drives the limiting sleeve fixedly connected to it to rotate synchronously, and then drives the connecting plate to rotate through the limiting sleeve. This causes multiple guide shafts fixedly connected to the opposite side of the sealing cover and the connecting plate to drive the corresponding second springs to twist. When the impact shaft disengages from the protrusion it is attached to, the protrusion loses its pushing force. At this time, the originally twisted second spring will return to its original state, thus rotating in the opposite direction. This achieves an additional horizontal reciprocating rotation while performing up-and-down vibration, so that the powder entering the vibrating cylinder will be subjected to vibration forces in different directions, which can fully disperse the agglomerated powder, assist the powder to fall evenly, and thus improve the uniform mixing effect between different powders.

[0018] 3. In this invention, when it is necessary to add other small amounts of powder into the mixing drum for mixing, simply extend the output shaft of the externally installed second electric actuator outward, and drive the fixedly connected pull plate to be pulled outward from the through hole below the corresponding powder bottle. This opens the through hole on the mounting base and the guide tube simultaneously. At this time, the required powder contained in the pull plate will enter the guide tube through the through hole below. The output shaft of the second motor drives the screw conveyor to rotate continuously inside the guide tube, so that the powder entering the guide tube is continuously discharged from the guide tube under the continuous rotation of the screw conveyor and enters the mixing drum to mix with other powders. Because the bottom of the powder bottle... There is a certain gap between the nozzle and the upper surface of the drawer plate, so that a certain amount of powder in the powder bottle will always fall to the upper surface of the drawer plate. When the falling powder reaches a certain height, the nozzle at the bottom of the drawer plate is blocked to stop the continuous flow. Before and after discharge, the ring pressure sensor fixedly connected to the mounting base will detect two stable values ​​of pressure exerted on it by the powder bottle and the powder in the bottle. Since the weight of the powder bottle itself and the amount of powder falling in the fixed gap are basically unchanged, at this time, only the weight of the powder bottle itself and the weight of the powder that fell to block the nozzle can be used to calculate the weight change of the powder before and after discharge, and thus obtain the amount of powder discharged, achieving the effect of precise dispensing. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention after removing the stirring cylinder and the sealing cap; Figure 4 This is a cross-sectional view of the stirring plate in this invention; Figure 5 This is a schematic diagram of the structure of the vibrating cylinder and the limiting sleeve in this invention; Figure 6 This is a schematic diagram of the structure at the bottom of the vibrating cylinder in this invention; Figure 7 This is a schematic diagram of the unloading mechanism in this invention.

[0021] In the diagram: 1. Mixing drum; 11. Sealing cover; 12. Feed hopper; 13. Discharge pipe; 14. Support plate; 2. Mixing mechanism; 21. First motor; 22. Rotating rod; 23. Spiral plate; 24. Mixing plate; 241. Sliding rod; 242. First spring; 243. Scraper; 244. Scraper strip; 245. Limiting groove; 246. Sliding block; 247. Spring wire; 248. Mounting block; 25. Vibrating cylinder; 251. Discharge hole; 252. Distributing block; 26. Protrusion. 27. Impact shaft; 28. Protective cover; 281. Limiting sleeve; 282. Connecting plate; 283. Guide shaft; 284. Second spring; 3. Feeding mechanism; 31. Guide pipe; 32. Mounting plate; 33. Second motor; 34. Screw conveyor; 35. Mounting base; 36. Powder bottle; 37. Ring pressure sensor; 38. Pull plate; 39. Discharge plate; 391. Fixing strip; 4. Unloading mechanism; 41. First electric push rod; 42. Support block; 43. Blocking plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Example 1 like Figures 1-3 As shown, a precise powder dispensing device for food production and processing includes a mixing drum 1. A sealing cover 11 is installed on the top of the mixing drum 1, and a feed hopper 12 connected to the inner cavity of the mixing drum 1 is embedded in the top of the sealing cover 11. A discharge pipe 13 is provided directly below the bottom of the mixing drum 1, and support plates 14 are fixedly connected to each other on the opposite side of the bottom of the mixing drum 1 and the discharge pipe 13. A mixing mechanism 2 for mixing powder is provided inside the mixing drum 1. The mixing mechanism 2 includes a first motor 21 fixedly installed on the top of the sealing cover 11. The bottom end of the output shaft of the first motor 21 passes through the mixing drum 1 and is fixedly connected to a rotating rod 22. A spiral plate 23 adapted to the contour of the bottom inner cavity of the mixing drum 1 and a plurality of upwardly inclined mixing plates 24 are fixedly connected to the rod body of the rotating rod 22. The spiral plate 23 is located below the mixing plates 24 and is spirally installed upward. A feeding mechanism 3 for introducing different powders is fixed through the arc-shaped outer wall near the top of the mixing drum 1. A discharge mechanism 4 for discharging the mixed powders is provided at the bottom of the mixing drum 1. Because different powders fall in different ways, they easily form stratified accumulations, making it difficult for powders with slower falling speeds to collide and diffuse sufficiently with those with faster falling speeds, resulting in problems with mixing uniformity. To extend the mixing time of the powders in the mixing drum 1, improve the collision and diffusion effect between different powders, and enhance the uniformity of mixing, the first motor 21 in the mixing mechanism 2 needs to be started first, and the output shaft of the first motor 21 drives the rotating rod 22 to rotate. The rotating rod 22 then drives the spiral plate 23 and the mixing plate 24 to rotate. As the powders enter the mixing drum 1 through the feeding hopper 12 and the feeding mechanism 3 and fall downwards, they are rotated along with the spiral plate 23 and the mixing plate 24. Multiple stirring plates 24, continuously rotating on the lever 22, impact the falling powder, dispersing it more evenly during its descent. Simultaneously, the upward tilt of the stirring plates 24 causes them to be pushed upwards and thrown up upon impact, extending the powder's falling speed and its time in the mixing drum 1. This allows for more uniform mixing of powders of different proportions during the fall. Meanwhile, the spiral plate 23 below, with its upward spiral structure, lifts any powder falling onto its surface upwards during rotation, subjecting it to further impact from the stirring plates 24. This further extends the mixing time and increases the frequency of collisions and diffusion between different powders, resulting in a more uniform mixture after continuous impact and rotation.

[0024] The feeding mechanism 3 includes a guide pipe 31 that penetrates and is fixed to the arc-shaped side wall of the mixing drum 1. A mounting plate 32 is fixedly connected to the end of the guide pipe 31 away from the mixing drum 1, and a second motor 33 is fixedly mounted on the mounting plate 32. A spiral conveying rod 34 is rotatably connected inside the guide pipe 31, and the outer spiral wall of the spiral conveying rod 34 is in close contact with the inner wall of the guide pipe 31. The end of the central axis of the spiral conveying rod 34 away from the rotating rod 22 penetrates the mounting plate 32 and is fixedly connected to the end of the output shaft of the second motor 33. Multiple evenly distributed mounting seats 35 are fixedly connected to the top of the guide pipe 31, and a powder bottle 36 is provided on the top of each mounting seat 35. The top of the guide pipe 31 is connected to multiple mounting seats 35. Each of the base 35 has a centrally connected vertical through hole, with the upper and lower vertical through holes having the same diameter. The bottom end of the powder bottle 36 is inserted into the vertical through hole on the base 35. The side wall of the base 35 has a transverse groove adapted to the through hole, and a pull plate 38 for sealing the through hole is slidably connected in the transverse groove. A gap of 4-8mm is provided between the upper surface of the pull plate 38 and the lower surface of the bottle mouth of the powder bottle 36. A ring pressure sensor 37 is attached to the bottom of the powder bottle 36 and is electrically connected to an external controller. The lower surface of the ring pressure sensor 37 is fixedly connected to the upper surface of the base 35. When it is necessary to add other small amounts of powder into the mixing drum 1 for mixing... Simply extend the output shaft of the externally connected second electric actuator outward, and drive the fixedly connected pull plate 38 to be pulled outward from the through hole below the corresponding powder bottle 36. This opens the through holes on the mounting base 35 and the guide tube 31 simultaneously. At this time, the required powder contained in the pull plate 38 will enter the guide tube 31 through the through hole below. The output shaft of the second motor 33 drives the screw conveyor 34 to rotate continuously inside the guide tube 31. The powder entering the guide tube 31 is continuously discharged from the guide tube 31 under the continuous rotation of the screw conveyor 34 and enters the mixing drum 1 to mix with other powders. Because there is a certain distance between the bottom of the powder bottle 36 and the upper surface of the pull plate 38... The gap ensures that a certain amount of powder in the powder bottle 36 will always fall onto the upper surface of the drawer plate 38. When the falling powder reaches a certain height, the bottom of the drawer plate 38 is blocked to prevent continuous flow. Before and after discharge, the annular pressure sensor 37, which is fixedly connected to the mounting base 35, will detect two stable values ​​of pressure exerted on it by the powder bottle 36 and the powder in the powder bottle 36. Since the weight of the powder bottle 36 itself and the amount of powder falling in the fixed gap are basically unchanged, at this time, only the weight of the powder bottle 36 itself and the weight of the powder that has fallen and blocked the bottle opening need to be taken into account to calculate the weight change of the powder before and after discharge, and thus obtain the amount of powder discharged, achieving the effect of precise dispensing.

[0025] The unloading mechanism 4 includes a first electric actuator 41 fixedly connected between two support plates 14. A blocking plate 43 is fixedly connected to the output shaft end of the first electric actuator 41, and the upper and lower surfaces of the blocking plate 43 are respectively attached to opposite sides of the two support plates 14. A rectangular groove is formed inside the blocking plate 43, and a support block 42 for sealing the rectangular groove is inserted into the groove. The end of the support block 42 away from the blocking plate 43 is fixedly connected to the lower support plate 14. A rotating groove is formed at the top of the support block 42, and the bottom of the inner wall of the rotating groove is attached to the bottom end of the rotating rod 22. When discharge is required... By activating the first electric push rod 41 in the unloading mechanism 4, its output shaft drives the blocking plate 43 to retract and move away from the support block 42 and the discharge port at the bottom of the mixing drum 1, thereby releasing the sealing effect on the discharge port at the bottom of the mixing drum 1, so that the fully mixed powder can be quickly discharged from the discharge port at the bottom of the mixing drum 1. The rotating groove on the support block 42 is in close contact with the bottom of the rotating rod 22. On the one hand, it can support the rotating rod 22 and improve its stability. On the other hand, the rotating groove can also limit the rotation of the rotating rod 22 to prevent it from tilting during rotation and causing structural damage.

[0026] Example 2 As a further improvement to Example 1, such as Figures 2-6 As shown, a vibrating cylinder 25 is slidably connected to the upper limit of the inner wall of the mixing cylinder 1 near the sealing cover 11. A rotating rod 22 passes through the center of the vibrating cylinder 25 and is slidably connected to the vibrating cylinder 25. Multiple evenly distributed protrusions 26 are provided on the lower surface of the vibrating cylinder 25. An impact shaft 27 is provided below the protrusions 26 and is fixedly connected to the rotating rod 22. The lowest point of the protrusions 26 is located between the central axis and the apex of the impact shaft 27. When the output shaft of the first motor 21 drives the rotating rod 22 to rotate, the impact shaft 27 fixedly connected to the rotating rod 22 rotates synchronously with the rotating rod 22. Since the lowest point of the protrusions 26 fixedly connected to the lower surface of the vibrating cylinder 25 is located... Between the central axis and the apex of the impact shaft 27, the impact shaft 27 will contact multiple evenly distributed protrusions 26 one by one during one rotation. Under continuous pushing, the protrusions 26 will be lifted up along the arc surface at the bottom of the protrusions 26. Since the vibrating cylinder 25 is connected to the inner wall of the mixing cylinder 1 by a limiting sliding connection, when multiple protrusions 26 are lifted up one by one, the vibrating cylinder 25 will also move upward with each protrusion 26 being lifted up, so that the vibrating cylinder 25 will perform multiple up and down vibrations. By using the multiple up and down vibrations of the vibrating cylinder 25, the powder falling into the feed hopper 12 will be thrown upward multiple times, so that the powder falling downward from the discharge hole 251 will be more dispersed and even.

[0027] A protective cover 28 is fixedly connected to the bottom of the sealing cover 11, and a limiting sleeve 281 is inserted into the bottom of the protective cover 28. The bottom end of the limiting sleeve 281 is fixedly connected to the bottom of the inner wall of the vibrating cylinder 25. The limiting sleeve 281 is sleeved on the rotating rod 22 and is slidably connected to the rotating rod 22. A connecting plate 282 is fixedly connected to the top of the limiting sleeve 281 located inside the protective cover 28. Multiple evenly distributed guide shafts 283 are fixedly connected to the connecting plate 282 and the opposite side of the inner wall of the sealing cover 11. A gap of 3-5cm is provided between the upper and lower corresponding guide shafts 283. The upper and lower corresponding guide shafts 283 are jointly inserted into a second spring 284. The upper and lower ends of the second spring 284 are fixedly connected to the connecting plate 282 and the opposite side of the sealing cover 11, respectively. Since the impact shaft 27 rotates horizontally with the rotating rod 22, when it pushes the protrusion 26 to move upward, in addition to the upward thrust, there is also a circumferential thrust. The circumferential thrust causes the protrusion 26 and the vibrating cylinder 25 to rotate horizontally during the upward movement. During this process, the vibrating cylinder 25 drives the limiting sleeve 281, which is fixedly connected to it, to rotate synchronously. In turn, the limiting sleeve 281 drives the connecting plate 282 to rotate, causing multiple guide shafts 283, which are fixedly connected to the sealing cover 11 on the opposite side of the connecting plate 282, to twist the corresponding second springs 284. When the impact shaft 27 disengages from the protrusion 26, the protrusion 26 loses its pushing force. At this time, the originally twisted second spring 284 will return to its original state and rotate in the opposite direction. This achieves a horizontal reciprocating rotation while performing up-and-down vibration, so that the powder entering the vibrating cylinder 25 will be subjected to vibration forces in different directions, which can fully disperse the agglomerated powder, assist the powder to fall evenly, and improve the uniform mixing effect between different powders.

[0028] Multiple evenly distributed material distribution blocks 252 are fixedly connected to the bottom of the inner wall of the vibrating cylinder 25. By fixing the multiple material distribution blocks 252 to the bottom of the vibrating cylinder 25, the vibrating cylinder 25 can continuously impact the powder when it vibrates up and down and rotates horizontally. This reduces the problem of insufficient mixing caused by powder agglomeration, enhances the dispersion effect of the powder when it falls from the discharge hole 251, and improves the uniformity of mixing. At the same time, when the powder enters the discharge hole 251, it is impacted by the multiple material distribution blocks 252 nearby, which can also reduce the risk of agglomerated powder clogging the discharge hole 251.

[0029] Example 3 As a further supplement to Example 1, such as Figures 1-7As shown, the end of the spiral conveyor rod 34 away from the second motor 33 extends towards the rotating rod 22 to the outside of the guide pipe 31. A throwing disc 39 is provided below the end of the guide pipe 31 away from the second motor 33, and the center of the throwing disc 39 is fixed through the rotating rod 22. When the powder to be mixed is discharged from the end of the guide pipe 31 near the rotating rod 22, it will fall onto the upper surface of the throwing disc 39. At this time, the throwing disc 39, which continues to rotate with the rotating rod 22, throws the powder that falls vertically onto its surface out in a circumferential direction, forcing the powder to diffuse and preventing the powder from accumulating below the opening of the guide pipe 31. By forcibly and evenly dispersing the powder in a circumferential direction, not only is the powder dispersed and mixed with other powders, but the thrown powder can also collide with other powders, further increasing the mixing effect.

[0030] Multiple evenly distributed fixing strips 391 are fixedly connected to the upper surface of the throwing disc 39. The multiple evenly distributed fixing strips 391 are fixedly connected to the upper surface of the throwing disc 39 to increase the friction between the powder and the powder, thereby increasing the centrifugal force on the powder to achieve forced acceleration, thereby improving the dispersion of the powder and the effect of impact mixing.

[0031] Two grooves are formed inside the stirring plate 24, and sliding rods 241 are slidably connected inside the grooves. A first spring 242 is fixedly connected to both the sliding rods 241 and the inner wall of the groove. A scraper 243 is fixedly connected to the ends of the two sliding rods 241 away from the first spring 242. A mounting groove is formed on the scraper 243, and a scraper strip 244 is fixedly engaged within the mounting groove. A limiting groove 245 is formed inside the stirring plate 24, and the limiting groove 245 communicates with the grooves. A slider 246 is slidably connected within the limiting groove 245, and the slider 246... A spring wire 247 is fixedly connected to the end of the 46 away from the chute. A mounting block 248 is fixedly connected to the end of the spring wire 247 away from the slider 246, and the mounting block 248 is fixedly connected to the outer wall of the mixing plate 24. A slot adapted to the size of the slider 246 is opened on the sliding rod 241 adjacent to the limiting groove 245, and the slot is engaged with the end of the slider 246. Since there are two chutes in the mixing plate 24, and the sliding rod 241 is slidably connected in the chute, during the process of rotating and hitting the powder, when the mixing plate 24 rotates in the opposite direction... When in motion, the slider 246 is stably engaged in the limiting groove 245 under the action of centrifugal force, limiting the sliding rod 241 and keeping it stably stationary in the groove opened on the stirring plate 24. When the stirring plate 24 rotates in the positive direction, the slider 246, which was originally engaged in the limiting groove 245 at one end, will be compressed by the spring wire 247 under the action of centrifugal force and move closer to the surface of the mounting block 248 until the end that was fully engaged in the limiting groove 245 is completely disengaged from the limiting groove 245. At this time, under the action of centrifugal force, the slider 246, which is slidably connected in the groove, will be disengaged. The sliding rod 241 extends outward and pulls the first spring 242 to stretch and deform. The extension of the sliding rod 241 also drives the scraper 243 and scraper 244 to extend outward until the scraper 244 is in contact with the inner wall of the mixing drum 1. At this time, the scraper 244 scrapes and cleans the powder adhering to the inner wall of the mixing drum 1 while the mixing plate 24 is continuously rotating, which improves the utilization rate of raw materials. At the same time, by controlling the rotation direction of the output shaft of the first motor 21, the effect of scraping the powder on the inner wall of the mixing drum 1 can be freely adjusted.

[0032] The scraper 244 is made of smooth rubber material. The rubber material improves the cleaning effect while reducing the noise that may be generated during the scraping process.

[0033] Working principle: When the device is working, the first motor 21 in the stirring mechanism 2 needs to be started first, and the output shaft of the first motor 21 drives the rotating rod 22 to rotate. Then, the rotating rod 22 drives the spiral plate 23 and the stirring plate 24 to rotate. As the powder enters the stirring drum 1 through the feeding hopper 12 and the feeding mechanism 3 and falls downward, the multiple stirring plates 24, which follow the rotating rod 22, will impact the falling powder, making it more evenly dispersed during the fall. At the same time, due to the upward tilt of the stirring plates 24, the powder is agitated when it collides with the stirring plates 24. The inclined surface on the mixing plate 24 pushes the powder upward and flies it up, thereby extending the falling speed of the powder and the time the powder stays in the mixing drum 1. This allows powders of different proportions to be mixed more evenly during the falling process. At the same time, the spiral plate 23 located below uses its spiral upward structure to lift the powder that has fallen on its surface back up when it rotates, so that it can be hit and struck by the mixing plate 24 again. This further extends the powder mixing time and the frequency of collision and diffusion between different powders, making the powder mixed more evenly after continuous hitting, impact and rotation. Meanwhile, when the output shaft of the first motor 21 drives the rotating rod 22 to rotate, the impact shaft 27, which is fixedly connected to the rotating rod 22, rotates synchronously with the rotating rod 22. Since the lowest point of the protrusion 26, which is fixedly connected to the lower surface of the vibrating cylinder 25, is located between the central axis and the apex of the impact shaft 27, the impact shaft 27 will contact multiple evenly distributed protrusions 26 one by one during one rotation. Under continuous pushing, it will lift the protrusions 26 along the arc-shaped surface at the bottom of the protrusions 26. Since the vibrating cylinder 25 is in a limited sliding connection with the inner wall of the stirring cylinder 1, when multiple protrusions 26 are lifted one by one, the vibrating cylinder 25 will also rotate synchronously with each one. The upward movement of the protrusion 26 causes the vibrating cylinder 25 to vibrate repeatedly. This repeated up-and-down vibration of the vibrating cylinder 25 repeatedly throws the powder falling into the feed hopper 12 upwards, making the powder falling downwards from the discharge hole 251 more evenly dispersed. Since the impact shaft 27 rotates horizontally following the rotating rod 22, when it pushes the protrusion 26 upwards, in addition to the upward thrust, there is also a horizontal thrust. This horizontal thrust causes the protrusion 26 and the vibrating cylinder 25 to rotate horizontally during the upward movement. During this process, the vibrating cylinder 25 will drive its fixed components... The limiting sleeve 281 of the fixed connection rotates synchronously, thereby driving the connecting plate 282 to rotate. This causes the multiple guide shafts 283, which are fixedly connected to the sealing cover 11 on the opposite side of the connecting plate 282, to twist the corresponding second springs 284. When the impact shaft 27 disengages from the protrusion 26 that is attached to it, the protrusion 26 loses its pushing force. At this time, the originally twisted second spring 284 will return to its original state, thus rotating in the opposite direction. This achieves an additional horizontal left-right rotation while performing up-and-down vibration, so that the powder entering the vibrating cylinder 25 will be subjected to... Vibration forces in different directions can fully disperse agglomerated powder, assist the powder to fall evenly, and thus improve the uniform mixing effect between different powders. Multiple material distribution blocks 252 are fixedly connected to the bottom of the vibrating cylinder 25, so that the vibrating cylinder 25 can continuously impact the powder when vibrating up and down and rotating horizontally. This reduces the problem of insufficient mixing caused by powder agglomeration, enhances the dispersion effect of powder falling from the discharge hole 251, and improves the uniformity of mixing. At the same time, when the powder enters the discharge hole 251, it is impacted by multiple material distribution blocks 252 nearby, which can also reduce the risk of agglomerated powder clogging the discharge hole 251. When other small amounts of powder need to be added into the mixing drum 1 for mixing, simply extend the output shaft of the externally mounted second electric actuator outward, and drive the fixedly connected pull plate 38 to be pulled outward from the through hole below the corresponding powder bottle 36. This causes the through holes on the mounting base 35 and the guide tube 31 to open simultaneously. At this time, the required powder contained in the pull plate 38 will enter the guide tube 31 through the through hole below. The output shaft of the second motor 33 drives the screw conveyor 34 to rotate continuously inside the guide tube 31, so that the powder entering the guide tube 31 is continuously discharged from the guide tube 31 under the continuous rotation of the screw conveyor 34, and enters the mixing drum 1 to mix with other powders. Because the bottom of the powder bottle 36 There is a certain gap between the bottle mouth and the upper surface of the draw plate 38, so that the powder in the powder bottle 36 will always fall a certain amount to the upper surface of the draw plate 38. When the falling powder reaches a certain height, the bottom of the bottle mouth of the draw plate 38 is blocked to prevent it from flowing out continuously. Before and after the discharge, the ring pressure sensor 37 fixedly connected to the mounting base 35 will detect two stable values ​​of the pressure exerted on it by the powder bottle 36 and the powder in the powder bottle 36. Since the weight of the powder bottle 36 itself and the amount of powder falling in the fixed gap are basically unchanged, at this time, only the weight of the powder bottle 36 itself and the weight of the powder that fell to block the bottle mouth beforehand need to be taken into account to calculate the weight change of the powder before and after the discharge, and then the amount of powder discharged can be obtained to achieve the effect of precise dispensing. When the powder to be mixed is discharged from the end of the guide pipe 31 near the rotating rod 22, it will fall onto the upper surface of the throwing disc 39. At this time, the throwing disc 39, which continues to rotate with the rotating rod 22, throws the powder that falls vertically onto its surface out in a circumferential direction, forcing the powder to diffuse and preventing the powder from accumulating below the opening of the guide pipe 31. By forcibly and evenly dispersing the powder out in a circumferential direction, not only is the powder dispersed and mixed with other powders, but the thrown powder can also collide with other powders, further increasing the mixing effect. Multiple evenly distributed fixing strips 391 are fixedly connected to the upper surface of the throwing disc 39 to increase the friction between the powder and the powder, thereby increasing the centrifugal force on the powder, achieving forced acceleration, and improving the effect of dispersing the powder and impact mixing. Because the mixing plate 24 has two grooves, and a sliding rod 241 is slidably connected in the grooves, during the rotation and impact of the powder, when the mixing plate 24 rotates in the opposite direction, the slider 246 is stably engaged in the limiting groove 245 under the action of centrifugal force, limiting the sliding rod 241 and keeping it stably in the groove on the mixing plate 24. When the mixing plate 24 rotates in the forward direction, the slider 246, which was originally engaged in the limiting groove 245 at one end, will be compressed by the spring wire 247 under the action of centrifugal force and move closer to the surface of the mounting block 248 until the end that is completely engaged in the limiting groove 245 is completely engaged. After disengaging from the limiting groove 245, under the action of centrifugal force, the sliding rod 241, which is slidably connected in the groove, will extend outward and pull the first spring 242 to stretch and deform. The extension of the sliding rod 241 will also drive the scraper 243 and scraper 244 to extend outward until the scraper 244 is in contact with the inner wall of the mixing drum 1. At this time, the scraper 244 scrapes and cleans the powder adhering to the inner wall of the mixing drum 1 while the mixing plate 24 is continuously rotating, which improves the utilization rate of raw materials. At the same time, by controlling the rotation direction of the output shaft of the first motor 21, the effect of scraping the powder on the inner wall of the mixing drum 1 can be freely adjusted. When material discharge is required, the first electric push rod 41 in the unloading mechanism 4 is activated, causing its output shaft to drive the blocking plate 43 to retract and move away from the support block 42 and the discharge port at the bottom of the mixing drum 1. This releases the sealing effect on the discharge port at the bottom of the mixing drum 1, allowing the fully mixed powder to be quickly discharged from the discharge port at the bottom of the mixing drum 1. The rotating groove on the support block 42 is in close contact with the bottom of the rotating rod 22. On the one hand, it can support the rotating rod 22 and improve its stability. On the other hand, the rotating groove can also limit the rotation of the rotating rod 22 to prevent it from tilting during rotation and causing structural damage.

[0034] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A precise powder dispensing device for food production and processing, characterized in that, include: A mixing drum (1) is provided with a sealing cover (11) installed on the top of the mixing drum (1), and a feed hopper (12) connected to the inner cavity of the mixing drum (1) is embedded in the top of the sealing cover (11). A discharge pipe (13) is provided directly below the bottom of the mixing drum (1), and a support plate (14) is fixedly connected to the bottom of the mixing drum (1) and the opposite side of the discharge pipe (13). A mixing mechanism (2) for mixing powder is provided inside the mixing drum (1). The mixing mechanism (2) includes a first motor (21) fixedly installed on the top of the sealing cover (11). The bottom end of the output shaft of the first motor (21) passes through the mixing drum (1) and is fixedly connected to a rotating rod (22). A spiral plate (23) adapted to the contour of the bottom cavity of the mixing drum (1) and a plurality of upwardly inclined mixing plates (24) are fixedly connected to the rod body of the rotating rod (22). The spiral plate (23) is located below the mixing plate (24), and the spiral plate (23) is spirally installed upward. The mixing drum (1) has a feeding mechanism (3) for introducing different powders fixed through the arc-shaped outer wall near the top, and the bottom of the mixing drum (1) is provided with a discharge mechanism (4) for discharging the mixed powder.

2. The precise powder dispensing device for food production and processing according to claim 1, characterized in that: The stirring cylinder (1) is slidably connected to the upper limit of the inner wall of the sealing cover (11) and the vibrating cylinder (25) has a plurality of uniformly arranged discharge holes (251) at the bottom of the vibrating cylinder (25). The rotating rod (22) passes through the center of the vibrating cylinder (25) and is slidably connected to the vibrating cylinder (25). The lower surface of the vibrating cylinder (25) is provided with a plurality of uniformly distributed protrusions (26). An impact shaft (27) is provided below the protrusions (26) and the impact shaft (27) is fixedly connected to the rotating rod (22). The lowest point of the protrusion (26) is located between the central axis and the apex of the impact shaft (27).

3. The precise powder dispensing device for food production and processing according to claim 2, characterized in that: The bottom of the sealing cover (11) is fixedly connected to a protective cover (28), and a limiting sleeve (281) is inserted into the bottom of the protective cover (28). The bottom end of the limiting sleeve (281) is fixedly connected to the bottom of the inner wall of the vibrating cylinder (25). The limiting sleeve (281) is sleeved on the rotating rod (22) and is slidably connected to the rotating rod (22). The top end of the limiting sleeve (281) located inside the protective cover (28) is fixedly connected to a connecting plate (282). Multiple evenly distributed guide shafts (283) are fixedly connected to the opposite side of the inner wall of the sealing cover (11) and the upper and lower corresponding guide shafts (283) are provided with a gap of 3-5cm. The upper and lower corresponding guide shafts (283) are jointly inserted with a second spring (284). The upper and lower ends of the second spring (284) are fixedly connected to the connecting plate (282) and the opposite side of the sealing cover (11), respectively.

4. The precise powder dispensing device for food production and processing according to claim 3, characterized in that: The bottom of the inner wall of the vibrating cylinder (25) is fixedly connected to a plurality of evenly distributed material distribution blocks (252).

5. The precise powder dispensing device for food production and processing according to claim 1, characterized in that: The feeding mechanism (3) includes a guide pipe (31) that passes through and is fixed on the arc-shaped side wall of the mixing drum (1). The end of the guide pipe (31) away from the mixing drum (1) is fixedly connected to a mounting plate (32), and a second motor (33) is fixedly mounted on the mounting plate (32). A spiral conveying rod (34) is rotatably connected inside the guide pipe (31), and the outer spiral wall of the spiral conveying rod (34) is in close contact with the inner wall of the guide pipe (31). The end of the central axis of the spiral conveying rod (34) away from the rotating rod (22) passes through the mounting plate (32) and is fixedly connected to the end of the output shaft of the second motor (33). A plurality of evenly distributed mounting seats (35) are fixedly connected to the top of the guide pipe (31), and each mounting seat (35) is provided with powder on its top. Bottle (36), the top of the guide tube (31) and the center of multiple mounting seats (35) are all provided with vertical through holes that are connected, and the two vertical through holes have the same diameter. The bottom end of the powder bottle (36) is inserted into the vertical through hole on the mounting seat (35). The side wall of the mounting seat (35) is provided with a horizontal groove that matches the through hole, and a draw plate (38) for sealing the through hole is slidably connected in the horizontal groove. The upper surface of the draw plate (38) and the lower surface of the bottle mouth of the powder bottle (36) are provided with a gap of 4-8mm. The bottom of the powder bottle (36) is fitted with an annular pressure sensor (37), and the annular pressure sensor (37) is electrically connected to an external controller. The lower surface of the annular pressure sensor (37) is fixedly connected to the upper surface of the mounting seat (35).

6. The precise powder dispensing device for food production and processing according to claim 5, characterized in that: The end of the spiral conveyor rod (34) away from the second motor (33) extends toward the rotating rod (22) to the outside of the guide tube (31). A throwing disc (39) is provided below the end of the guide tube (31) away from the second motor (33), and the center of the throwing disc (39) is fixed through the rotating rod (22).

7. The precise powder dispensing device for food production and processing according to claim 6, characterized in that: The upper surface of the material feeding disc (39) is fixedly connected with a plurality of evenly distributed fixing strips (391).

8. The precise powder dispensing device for food production and processing according to claim 1, characterized in that: The stirring plate (24) has two grooves, and a sliding rod (241) is slidably connected in the groove. The sliding rod (241) and the inner wall of the groove are fixedly connected to a first spring (242). The ends of the two sliding rods (241) away from the first spring (242) are fixedly connected to a scraper (243). The scraper (243) has an installation groove, and a scraper strip (244) is fixedly engaged in the installation groove. The stirring plate (24) has a limiting groove (245), and the limiting groove (245) is connected to the sliding rod. The grooves are connected, and a slider (246) is slidably connected in the limiting groove (245). A spring wire (247) is fixedly connected to the end of the slider (246) away from the groove. An installation block (248) is fixedly connected to the end of the spring wire (247) away from the slider (246). The installation block (248) is fixedly connected to the outer wall of the stirring plate (24). A slot adapted to the size of the slider (246) is opened on the sliding rod (241) adjacent to the limiting groove (245), and the slot is engaged with the end of the slider (246).

9. A precise powder dispensing device for food production and processing according to claim 8, characterized in that: The scraper (244) is made of smooth rubber material.

10. A precise powder dispensing device for food production and processing according to claim 1, characterized in that: The unloading mechanism (4) includes a first electric push rod (41) fixedly connected between two support plates (14). The output shaft end of the first electric push rod (41) is fixedly connected to a blocking plate (43), and the upper and lower surfaces of the blocking plate (43) are respectively attached to the opposite side of the two support plates (14). A rectangular groove is opened in the blocking plate (43), and a support block (42) for sealing the rectangular groove is inserted in the rectangular groove. The end of the support block (42) away from the blocking plate (43) is fixedly connected to the support plate (14) located below. A rotating groove is opened on the top of the support block (42), and the bottom of the inner wall of the rotating groove is attached to the bottom end of the rotating rod (22).

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