A multi-specification spherical particle screening and filling device and a control method thereof

Abstract

The application discloses a kind of screening filling device and control method of multi-specification spherical particles, it is related to particle screening filling technical field, wherein, screening filling device is by integrating setting on support main body by screening mechanism, drive mechanism, discharging mechanism, shunt mechanism, filling mechanism, flow guide structure, can simultaneously realize the separation of multiple particle size particulate material and respectively direct connection to multi-specification filling line;Screening mechanism includes screening frame and screen cloth arranged on the screening frame, drive mechanism drives screen cloth to realize the synchronous swing between each screen cloth, and the angle of device is adaptively adjusted by control device, the technical scheme of the application, can simultaneously realize the separation of multiple particle size particulate material and respectively direct connection to multi-specification filling line.

Description

Technical Field

[0001] This invention relates to the field of particle screening and filling technology, and in particular to a screening and filling device and control method for multi-specification spherical particles. Background Technology

[0002] Spherical or near-spherical granular materials typically need to be graded and screened according to particle size during the production process, and then filled according to different particle size specifications.

[0003] For screening equipment, the existing screening devices typically have independent vibration of each screen layer or floating connection through elastic elements, lacking a rigid linkage mechanism. This results in inconsistent movement phases of each screen layer, leading to differences in the movement of particles on the screen, which affects screening efficiency. Furthermore, the discharge path after screening is singular, making it difficult to achieve independent and continuous discharge of each particle size fraction.

[0004] Furthermore, existing filling devices often employ methods such as reciprocating motion of a metering plate, rotary metering disc, or weighing. For example, Chinese patent CN202610273843.1 discloses a pill filling device that uses a motor-crank-connecting rod linkage to drive the metering plate in reciprocating motion. The pills fall from the hopper into the metering tank, and the number of pills measured per cycle is controlled by an adjustable metering block. The filling is completed by using a cylinder to prevent blockage and assist in vibration during the descent. These solutions typically only provide quantitative filling for single-size particles and do not have the capability to classify mixed particle sizes.

[0005] In addition, the screening and filling equipment currently on the market is usually a split structure, that is, after screening, the material is transferred to the filling equipment after transportation and other processes. On the one hand, a conveying device for material transfer needs to be arranged between the screening device and the filling device, which occupies a large area and has low space utilization, making it difficult to meet the needs of compact workshop layout. On the other hand, the risk of contamination is increased during the transfer of particulate materials.

[0006] To address the aforementioned issues, although integrated structures exist on the market, they lack the ability to adaptively adjust screening parameters (such as screen oscillation amplitude, oscillation frequency, discharge angle, etc.) and filling parameters (such as single filling quantity, push interval, etc.) for different particle sizes. When switching to materials with different particle sizes, it is necessary to manually replace the screen or adjust mechanical parts, which is a complex and inefficient process that cannot meet the rapid response requirements of multi-variety, small-batch production. Summary of the Invention

[0007] The main objective of this invention is to provide a screening and filling device and control method for multi-specification spherical particles, aiming to solve the problems existing in the background art.

[0008] To achieve the above objectives, the present invention provides a screening and filling device for multi-specification spherical particles, comprising: Supporting entity; A screening mechanism is provided on the supporting body, including a screening frame and screens provided on the screening frame. Multiple screens are provided at intervals from top to bottom, and the screen apertures of the multiple screens decrease from top to bottom. Each layer of screens has a discharge port, and the discharge ports of adjacent screens are arranged in opposite directions. The screening frame has a feed inlet, and the feed inlet has a feed funnel. A drive mechanism is located on the back side of the screening mechanism and includes a drive component and a linkage component. The drive component is located on the support body and connected to the linkage component, and is used to drive the linkage component to swing back and forth. The linkage component is connected to each layer of the screen to drive each layer of the screen to swing synchronously. A feeding mechanism is located on one side of the screening frame where the discharge port is located, and is used to control the opening and closing of the discharge port on the same side; A diversion mechanism is located on one side of the screening mechanism and has independent diversion channels inside it. Each discharge port corresponds to one diversion channel. A filling mechanism, located below the diversion mechanism, is used to receive the particles discharged by the diversion mechanism and quantitatively fill them into a container; A flow guiding structure, disposed in the flow-dividing channel, is used to guide particles in the flow-dividing channel; and The control mechanism is electrically connected to the drive mechanism, the feeding mechanism and the filling mechanism, and is used to control the swing parameters of the drive mechanism, the opening and closing of the feeding mechanism and the quantitative filling of the filling mechanism.

[0009] In one embodiment, the linkage component includes a rigid connector and a swing crossbar; The rigid connectors are located on both sides of the screen and are rotatably connected to each layer of the screen. The middle part of the swing plate is pivotally mounted on the support body, and both ends of the swing plate are rotatably connected to the rigid connecting member.

[0010] In one embodiment, the drive assembly includes a motor and a transmission component, the motor being fixedly mounted on the support body; The transmission component includes a first gear and a second gear; the first gear is a sector gear and is fixedly connected to the output shaft of the motor. The second gear is located below the first gear and meshes with the first gear. The second gear is coaxial with the pivot and rotates synchronously.

[0011] In one embodiment, the feeding mechanism includes a baffle assembly and a lifting assembly. The lifting assembly is disposed on the supporting body below both sides of the screening structure, and the baffle assembly is disposed at the extended end of the lifting assembly. The baffle assembly includes baffle plates corresponding to multiple discharge ports on the same side, and the baffle plates are movably configured to open or close the corresponding discharge ports.

[0012] In one embodiment, the flow guiding structure includes a guide plate, and each flow diversion channel is provided with a corresponding guide plate, the guide plate being inclined.

[0013] In one embodiment, the filling mechanism includes: A flow-retarding component, located below the flow-diverting mechanism, includes multiple slides with different inner diameters for guiding particles within the slides; A pushing component, located below the slide, is connected to the end of the slide via a discharge pipe and is used to control the amount of granular material falling. A counting component, disposed on the pushing component, is used to control the filling quantity of granules; A conveying assembly, located below the discharge pipe, is used to convey filling containers.

[0014] In one embodiment, the pushing component includes a blocking plate and a pushing cylinder. The pushing cylinder is disposed on the support body, and the blocking plate is disposed at the extended end of the pushing cylinder. The blocking plate blocks the material drop pipe under the action of the pushing cylinder.

[0015] The present invention also proposes a control method applicable to the screening and filling device described above, comprising the following steps: S1: Obtain the particle size specification information of the particles to be screened, and call the corresponding preset formula parameters in the control mechanism. The preset formula parameters include the screen oscillation frequency, discharge tilt angle, discharge sequence and single filling quantity. S2: Control the drive mechanism to drive the multi-layer screen to swing synchronously back and forth at the screen swing frequency, so that the mixed particle size particles are screened in layers on each screen. S3: After screening is completed, control the drive mechanism to tilt the screen as a whole to the discharge tilt angle in the first direction, and control the discharge mechanism to open the discharge port in the first direction so that particles of different sizes on the same side are discharged through the corresponding discharge pipe. S4: Control the drive mechanism to tilt the screen in the second direction to the discharge tilt angle, and control the discharge mechanism to open the discharge port in the second direction so that particles of different sizes are discharged through the corresponding discharge pipes. The first direction is opposite to the second direction. S5: Particles of different sizes enter the respective slides in the slow-flow component through the corresponding diversion mechanism and form a single-line queue in the slides; S6: Particles enter the discharge pipe through the end of the slide. The counting component counts the particles passing through the discharge pipe. When the count value of the counting component reaches the single filling quantity, the control mechanism controls the pushing component to move, and the blocking plate blocks the discharge pipe to complete the single quantitative filling. When the count value does not reach the single filling quantity, the blocking plate remains open, allowing the particles to continue falling and completing the filling action.

[0016] In one embodiment, the set value of the screen oscillation frequency in step S2 is determined as follows: Obtain the particle size d of the currently screened particles and the corresponding friction coefficient f(d), and calculate the critical oscillation frequency f using the following formula. min :

[0017] Where g is the acceleration due to gravity, Lh is the horizontal lever arm from the pivot to the connection point of the swing crossbar, α is the reference tilt angle of the screen, s is the average distance of the particles from the pivot, and r is the crank eccentricity of the drive mechanism. The screen oscillation frequency f is set to:

[0018] in For safety reasons, .

[0019] In one embodiment, in steps S3 and S4, the discharge tilt angle is determined as follows: Calculate the discharge tilt angle using the following formula. :

[0020] Among them, among them, To install a reference angle for the screen, Add a camber angle to the crankshaft at its extreme positions. For safety margin angle, .

[0021] The technical solution of this invention achieves rigid synchronous oscillation of each screen layer by employing a drive component to connect multiple layers of screens, along with rigid connectors, a swinging cross plate, and a pivot structure. Compared to traditional elastic or hinged floating connection methods, this solution ensures the consistency of the motion phase of each screen layer during oscillation, effectively avoiding the problem of reduced screening efficiency caused by asynchronous vibration of each layer. Simultaneously, the aperture diameter of the multiple screens decreases from top to bottom, and each screen layer corresponds to an independent discharge port, thereby simultaneously screening spherical particles of various sizes into multiple different specifications during a single feeding process, improving the equipment's utilization efficiency. Furthermore, by integrating multi-stage particle size screening, independent diversion, and quantitative filling into a single operation process, the screening and filling stages are seamlessly connected, ensuring filling accuracy while improving the co-line production efficiency of multi-specification particle products. Attached Figure Description

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

[0023] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the screening and filling device of the present invention; Figure 2 This is a schematic diagram of the back side three-dimensional structure of an embodiment of the screening and filling device of the present invention; Figure 3 This is a cross-sectional three-dimensional structural diagram of an embodiment of the screening and filling device of the present invention; Figure 4 for Figure 3 Enlarged structural diagram of section A; Figure 5 This is a three-dimensional structural diagram of the screening mechanism and the feeding mechanism of the present invention; Figure 6 This is a three-dimensional structural diagram of the pushing component and the counting component of the present invention; Figure 7 This is a cross-sectional schematic diagram of the flow-slowing mechanism in this invention; Figure 8 This is a cross-sectional schematic diagram of the shunt component in this invention.

[0024] Explanation of icon numbers: 1. Support body; 2. Screening mechanism; 21. Screening frame; 22. Screen; 221. First screen; 222. Second screen; 223. Third screen; 224. Base plate; 3. Discharge port; 4. Inlet; 5. Drive mechanism; 51. Drive assembly; 511. Motor; 512. Transmission component; 5121. First gear; 5122. Second gear; 52. Linkage assembly; 521. Rigid connecting component; 522. Swinging cross plate; 6. Feeding mechanism; 61. Baffle assembly; 611. Baffle plate; 62. Lifting assembly; 7. Diverting mechanism; 71. Diverting channel; 8. Filling mechanism; 81. Flow control assembly; 811. Slide rail; 82. Pushing assembly; 821. Material blocking plate; 822. Pushing cylinder; 83. Counting assembly; 84. Conveying assembly; 9. Flow guiding mechanism; 91. Guide plate; 10. Control mechanism; 11. Pivot; 12. Buffer liner; 13. Drop pipe.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] See attached document Figure 1-8 The present invention discloses a screening and filling device for multi-specification spherical particles, which aims to solve the technical problems of traditional screening and filling equipment where screening and filling are independent, the lack of rigid linkage between the various screens 22 leading to low screening efficiency, and the difficulty in simultaneously completing screening and filling of particles of different sizes in a single feeding. The multi-specification spherical particle screening and filling device provided in this embodiment includes a support body 1, a screening mechanism 2, a driving mechanism 5, a feeding mechanism 6, a diversion mechanism 7, a filling mechanism 8, a guiding mechanism 9, and a control mechanism 10. This device achieves multi-level particle size separation of spherical particles through the rigid synchronous oscillation of multiple screens 22, and directly connects particles of different sizes to the filling mechanism 8 through an independent diversion channel 71, realizing integrated screening and filling operations.

[0030] The screening mechanism 2 is mounted on the support body 1 and includes a screening frame 21 and screens 22 mounted on the screening frame 21. Multiple screens 22 are spaced apart from top to bottom, with the aperture size of the screens decreasing from top to bottom. The screening frame 21 has a discharge port 3, with each screen 22 corresponding to one discharge port 3, and the discharge ports 3 of adjacent screens 22 are oriented opposite to each other. The top of the screening frame 21 has a feed inlet 4, and a feed funnel is located at the feed inlet 4. The feed funnel has a conical structure, wider at the top and narrower at the bottom, used to feed the mixed particles to be screened into the screening frame 21 and guide them to the surface of the first screen 221.

[0031] like Figure 1 and 2 As shown, the drive mechanism 5 is located on the back side of the screening mechanism 2, and includes a drive component 51 and a linkage component 52. The drive component 51 is located on the support body 1 and connected to the linkage component 52, and is used to drive the linkage component 52 to reciprocate. The linkage component 52 is connected to each layer of screens 22 to drive each layer of screens 22 to swing synchronously.

[0032] The feeding mechanism 6 is located on one side of the screening frame 21 where the discharge port 3 is located, and is used to control the opening and closing of the discharge port 3 on the same side.

[0033] Reference Figure 1 and Figure 2 The diversion mechanism 7 is located on one side of the screening mechanism 2, and it has independent diversion channels 71. Each discharge port 3 corresponds to one diversion channel 71.

[0034] Reference Figure 1 and Figure 2 The filling mechanism 8 is located below the diversion mechanism 7 and is used to receive the particles discharged from the diversion mechanism 7 and quantitatively fill them into the container. The filling mechanism 8 includes a slow-flow component 81, a pushing component 82, a counting component 83, and a conveying component 84.

[0035] like Figure 8 As shown, the flow guiding mechanism 9 is disposed in the flow diversion channel 71 for guiding particles in the flow diversion channel 71; and In this embodiment, the control mechanism 10 is electrically connected to the drive mechanism 5, the feeding mechanism 6, and the filling mechanism 8, and is used to control the swing parameters of the drive mechanism 5, the opening and closing of the feeding mechanism 6, and the quantitative filling of the filling mechanism 8.

[0036] The technical solution of this invention achieves rigid synchronous oscillation of each layer of screens 22 by using a drive component 51 to drive and connect multiple layers of screens 22, and in conjunction with a rigid connector 521, a swinging cross plate 522, and a pivot 11 structure. Compared with traditional elastic or hinged floating connection methods, this solution ensures the consistency of the motion phase of each layer of screens 22 during oscillation, effectively avoiding the problem of reduced screening efficiency caused by asynchronous vibration of each layer. At the same time, the aperture of the multiple screens 22 decreases from top to bottom, and each layer of screens 22 corresponds to an independent discharge port 3, thereby simultaneously screening spherical particles of various sizes into multiple different specifications in a single feeding process, improving the efficiency of the equipment. Furthermore, by integrating multi-stage particle size screening, independent diversion, and quantitative filling into an integrated operation process, the screening and filling stages are seamlessly connected, improving the co-line production efficiency of multi-specification particle products while ensuring filling accuracy.

[0037] In one embodiment of the present invention, combined with Figures 3-5 Preferably, the screen 22 has three layers, from top to bottom: a first screen 221, a second screen 222, and a third screen 223. The first screen 221 has the largest aperture, used to trap the largest particles; the second screen 222 has the next largest aperture; and the third screen 223 has the smallest aperture, used to trap the smallest particles. Below the bottom third screen 223 is a base plate 224, a non-perforated plate structure, used to receive the smallest particles that pass through the third screen 223, allowing these particles to be discharged through the corresponding outlet 3.

[0038] Specifically, such as Figure 4 As shown, in this embodiment, the discharge ports 3 of the first screen 221 and the third screen 223 are located on the left side of the screening frame 21, while the discharge ports 3 of the second screen 222 and the bottom plate 224 are located on the right side of the screening frame 21. This alternating arrangement allows particles of different sizes to be discharged from both sides of the screening frame 21, providing a compact structural basis for the subsequent diversion mechanism 7.

[0039] In one embodiment of the present invention, the linkage component 52 is connected to each layer of screen 22 to drive each layer of screen 22 to swing synchronously. Specifically, the linkage component 52 includes a rigid connector 521 and a swinging horizontal plate 522. The rigid connector 521 is disposed on the left and right sides of the screen 22 and is rotatably connected to each layer of screen 22. The rigid connector 521 is a long strip plate structure, which is arranged along the side extension direction of the screen 22. A rotating connection part (not shown in the figure) is provided on the rigid connector 521 corresponding to the position of each layer of screen 22. The rotating connection part is hinged to the side of the screen 22 by a pin. Each layer of screen 22 is connected as a whole by the rigid connectors 521 on the left and right sides, realizing the rigid linkage of each layer of screen 22 during the swinging process and ensuring the consistency of the movement phase of each layer of screen 22. The middle part of the swinging horizontal plate 522 is mounted on the support body 1 through a pivot 11, and the two ends of the swinging horizontal plate 522 are rotatably connected to the rigid connector 521. Specifically, the two ends of the swing plate 522 are hinged to the rigid connecting parts 521 on both sides of the screen 22 via pins. When the swing plate 522 swings back and forth around the pivot 11, its two ends drive the rigid connecting parts 521 on both sides to move synchronously, thereby driving all layers of screen 22 to swing synchronously.

[0040] The drive assembly 51 includes a motor 511 and a transmission component 512. The motor 511 is mounted on the support body 1, and its output end is connected to the transmission component 512. The output end of the transmission component 512 is connected to the pivot 11 to drive the pivot 11 to rotate synchronously. It is worth noting that the motor 511 in this embodiment is a periodically reversible motor, and the aforementioned functional motor 511 is a commercially available mature product, which will not be described in detail in this embodiment. In this embodiment, the transmission component 512 includes a first gear 5121 and a second gear 5122. The first gear 5121 is a sector gear and is fixedly connected to the output shaft of the motor 511. (Refer to the attached diagram.) Figure 4 The second gear 5122 is positioned below the first gear 5121 and meshes with it. The second gear 5122 is coaxially mounted with the pivot 11 and rotates synchronously. The motor 511 drives the first gear 5121 to perform a reciprocating oscillating motion, which in turn drives the pivot 11 and the swing plate 522 to reciprocate synchronously via the second gear 5122. The reciprocating oscillation angle of the sector gear can be adjusted according to actual screening requirements.

[0041] In one embodiment of the present invention, the feeding mechanism 6 includes a baffle assembly 61 and a lifting assembly 62. The lifting assembly 62 is disposed on the support body 1 below the left and right sides of the screening mechanism 2, and the baffle assembly 61 is disposed at the extended end of the lifting assembly 62. The baffle assembly 61 includes baffle plates 611 corresponding to multiple discharge ports 3 on the same side, and the baffle plates 611 are movably configured to open or close the corresponding discharge ports 3. Specifically, two baffle plates 611 located on the left side are fixedly connected by a longitudinal beam to form a left baffle assembly 61, and two baffle plates 611 located on the right side are fixedly connected by a longitudinal beam to form a right baffle assembly 61. Specifically, the baffle assembly 61 in this embodiment is C-shaped. In addition, the lifting assembly in this embodiment is a lifting cylinder, the cylinder body of which is fixed to the support body 1, and the piston rod end of the lifting cylinder is fixedly connected to the baffle assembly 61. The spacing between adjacent baffle plates 611 matches the spacing between two adjacent layers of screens 22 to ensure that each baffle plate 611 can accurately block the corresponding discharge port 3.

[0042] The working sequence of the baffle assembly 61 is as follows: During the screening process, the baffle assembly 61 is in the closed state, blocking all discharge ports 3, so that the particles are fully screened on each layer of screen 22; after the screening has been carried out for a predetermined time, the lifting component 62 drives the baffle assembly 61 to rise or fall, opening the discharge ports 3, so that the particles of different sizes intercepted on each layer of screen 22 enter the diversion channel 71 through the corresponding discharge ports 3; after the discharge is completed, the lifting component 62 drives the baffle assembly 61 to reset, blocking the discharge ports 3 again, and entering the next screening cycle.

[0043] In one embodiment of the present invention, combined with Figure 1-4 and Figure 8 The diversion mechanism 7 includes a first diversion component and a second diversion component, respectively located on the left and right sides of the screening frame 21. Specifically, both the first and second diversion components are provided with two diversion channels 71. In this embodiment, the discharge port 3 on the left side of the screening frame 21 (the discharge port 3 of the first screen 221 and the third screen 223) corresponds to the first diversion component, and the discharge port 3 on the right side of the screening frame 21 (the discharge port 3 of the second screen 222 and the bottom plate 224) corresponds to the second diversion component. The feed end of the diversion channel 71 is connected to the corresponding discharge port 3 of each layer on the same side, and adjacent diversion channels 71 are not interconnected. This corresponding direct connection structure allows particles of different sizes to immediately enter their respective independent diversion channels 71 after discharge, avoiding secondary mixing and realizing direct diversion of particles of different sizes.

[0044] In one embodiment of the present invention, in conjunction with the appendix Figure 8The flow guiding mechanism 9 includes a guide plate 91. Each flow channel 71 has a guide plate 91 inside, and the guide plate 91 is inclined. In this embodiment, one end of the guide plate 91 is located away from the screening mechanism 2, and the end extends obliquely downward. The inclination angle of the guide plate 91 is 30°-60°, so that the particles slide smoothly down the surface of the guide plate 91 under the action of gravity.

[0045] In one embodiment of the present invention, the flow-slowing component 81 is disposed below the flow-diverting mechanism 7, and includes, for example: Figure 7 The multiple non-linear channels 811 shown are used to guide particles to slide downstream within the channels 811. The number of channels 811 is the same as the number of diversion channels 71, and the inlet end of each channel 811 is connected to the outlet end of the corresponding diversion channel 71. The non-linear channels 811 (such as serpentine or spiral channels) can extend the flow path of the particles, reduce the downward speed of the particles under gravity, and play a buffering role. In addition, the inner diameter of each channel 811 is different, and the inner diameter of the channel 811 matches the diameter of the particles to be passed, so that the particles are arranged in a single row within the channel 811. Specifically, the channel 811 corresponding to larger particle diameters has a larger inner diameter, and the channel 811 corresponding to smaller particle diameters has a smaller inner diameter. Specifically, in this embodiment, the inner diameter of the channel 811 is configured to be larger than the corresponding particle diameter but less than 1.5 times the particle diameter, to ensure that the particles can pass through the channel 811 in a single row without side-by-side or jamming.

[0046] To cushion the impact of particles within the slide 811, a cushioning liner 12 is provided on the inner wall of the slide 811. The cushioning liner 12 is preferably a flexible material layer, such as polyurethane rubber or silicone, with a thickness of 2-5 mm. The cushioning liner 12 can effectively absorb the impact energy generated when particles collide with the wall surface in the curved section of the slide 811, reducing the particle breakage rate.

[0047] The pushing component 82 is located below the slide 811 and is connected to the end of the slide 811 via the discharge pipe 13. Referring to Figure 6, the pushing component 82 includes a blocking plate 821 and a pushing cylinder 822. The pushing cylinder 822 is mounted on the support body 1, and the blocking plate 821 is located at the extended end of the pushing cylinder 822. The blocking plate 821 blocks or opens the discharge pipe 13 under the drive of the pushing cylinder 822. Each discharge pipe 13 is provided with one pushing component 82 for independently controlling the filling of granules of various sizes.

[0048] A counting component 83 is mounted on the pushing component 82 and is used to control the filling quantity of granules. The counting component 83 is preferably a photoelectric counter or a laser counter, with its detection end located at the inlet of the feed pipe 13 or the end of the chute 811, counting each passing granule individually. When the counting component 83 detects that the number of passing granules has reached the preset filling quantity, it sends a signal to the control component.

[0049] The conveying assembly 84 is disposed below the discharge pipe 13 and is used to convey the filling containers. The conveying assembly 84 is preferably a belt conveyor, which is provided with a container positioning groove for sequentially conveying the filling containers directly below each discharge pipe 13.

[0050] In one embodiment of the present invention, the control mechanism 10 is a programmable logic controller (PLC) with input / output interfaces and a human-machine interface. Operators can preset formula parameters corresponding to different particle size specifications through the human-machine interface, including the oscillation frequency of the screen 22, the discharge tilt angle, the discharge sequence, and the quantity filled per batch. The control mechanism 10 automatically adjusts the speed and positioning angle of the motor 511, the action sequence of the lifting component 62, the opening and closing timing of the push cylinder 822, and the stepping rhythm of the conveying component 84 according to the preset formula, achieving fully electronically controlled parameterized adaptive adjustment.

[0051] It is worth noting that the feed inlet 4 in this embodiment is equipped with an adjustment structure (not shown in the figure) that can control the feed speed, such as a flow regulating valve, to control the feed speed and ensure the stability of the screening effect.

[0052] See attached document Figure 1-8 Initially, the baffle is closed, and each layer of screens 22 is in a horizontal position. The spherical particle mixture to be screened is fed into the feeder and falls onto the surface of the first screen 221. The motor 511 is started, and the motor 511 drives the first gear 5121 to reciprocate. Through the meshing transmission of the second gear 5122, the oscillating motion is transmitted to the pivot 11. The pivot 11 drives the swing plate 522 to reciprocate around its axis. The two ends of the swing plate 522 drive the rigid connecting members 521 on both sides to move synchronously. The rigid connecting members 521 drive each layer of screens 22 to swing synchronously.

[0053] The particles are affected by the combined effects of oscillation and gravity on the first screen 221. Particles with a diameter larger than the aperture of the first screen 221 are trapped on the surface of the first screen 221 and move to the lower left end, waiting to be discharged. Particles with a diameter smaller than the aperture of the first screen 221 pass through the first screen 221 and fall onto the surface of the second screen 222. The particles pass through the second screen 222 and the third screen 223 in sequence, and the smallest particle falls onto the bottom plate 224.

[0054] After the screening reaches the predetermined time, the lifting assembly 62 drives the baffle assembly 61 to rise, opening each discharge port 3. Particles on the first screen 221 and the third screen 223 enter the corresponding diversion channel 71 of the first diversion component through the left discharge port 3, while particles on the second screen 222 and the bottom plate 224 enter the corresponding diversion channel 71 of the second diversion component through the right discharge port 3. Each diversion channel 71 transports particles of different sizes to the corresponding filling equipment downstream. After discharge is completed, the baffle assembly 61 resets, closes the discharge port 3, and enters the next working cycle.

[0055] After being screened by the screening mechanism, particles of different sizes enter the corresponding slides 811 through the diversion channel 71. They are arranged in a single orderly row in the slides 811 and slide slowly downwards by gravity. When the particles reach the end of the slides 811, they enter the discharge pipe 13. At this time, the baffle plate 821 is in the blocking position under the drive of the push cylinder 822, and the particles are blocked in the discharge pipe 13.

[0056] After the conveying component 84 transports the filling container to the corresponding discharge pipe 13, the control component controls the push cylinder 822 to drive the blocking plate 821 backward, opening the discharge pipe 13. The particles fall into the filling container under gravity. Simultaneously, the counting component 83 counts the passing particles. When the count reaches a preset value, the control component controls the push cylinder 822 to reset the blocking plate 821, re-blocking the discharge pipe 13 and completing one quantitative filling cycle. Subsequently, the conveying component 84 removes the filled container and transports the next empty container to the discharge pipe 13, beginning the next filling cycle.

[0057] The different chutes 811 and their corresponding push components 82 are independent of each other, allowing for simultaneous quantitative filling of particles of different specifications without interference. For the same batch of material, particles of different sizes can be filled into different containers, enabling the synchronous production of multiple product specifications.

[0058] This embodiment achieves single-row orderly conveying of particles and smooth flow rate control through the matching design of the inner diameter of the slide 811 in the slow-flow component 81 with the particle diameter, combined with a non-linear path arrangement. The cooperation between the counting component 83 and the push cylinder 822 ensures precise and controllable filling quantity. The buffer liner further reduces the risk of particle collision during conveying. Overall, the quantitative filling equipment and screening mechanism of this embodiment form a compact integrated production line of screening-diversion-filling, avoiding secondary transfer and contamination risks of particles in intermediate stages.

[0059] The present invention also proposes a control method, which includes the screening and filling device described above. The specific structure of the screening and filling device is as described in the above embodiments. Since this control scheme adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0060] The control method in this embodiment automatically adjusts the oscillation parameters of the drive mechanism, the opening and closing sequence of the feeding mechanism, and the filling parameters of the filling mechanism by calling preset formula parameters through a control mechanism, thereby achieving adaptive sieving and quantitative filling of particles of different sizes. In this embodiment, the control mechanism adopts a programmable logic controller (PLC), which internally stores preset formula parameters corresponding to various particle size specifications. The preset formula parameters include the screen oscillation frequency f, the discharge tilt angle α_dump, the feeding sequence, and the single filling quantity N. After the operator selects the particle size specification of the particles to be processed through the human-machine interface, the control mechanism automatically calls the corresponding formula parameters, without the need for manual screen replacement or adjustment of mechanical parts.

[0061] The specific steps are as follows: S1: Obtain the particle size specification information of the particles to be screened, and call the corresponding preset formula parameters in the control mechanism. The preset formula parameters include the screen oscillation frequency, discharge tilt angle, discharge sequence and single filling quantity. S2: Control the drive mechanism to drive the multi-layer screen to swing synchronously back and forth at the screen swing frequency, so that the mixed particle size particles are screened in layers on each screen. S3: After screening is completed, control the drive mechanism to tilt the screen in the first direction to the discharge tilt angle, and control the discharge mechanism to open the discharge port in the first direction so that particles of different sizes on the same side are discharged through the corresponding discharge pipe. S4: Control the drive mechanism to tilt the screen in the second direction to the discharge tilt angle, and control the discharge mechanism to open the discharge port in the second direction so that particles of different sizes can be discharged through the corresponding discharge pipes. The first direction is opposite to the second direction. S5: Particles of different sizes enter the respective slides in the slow-flow component through the corresponding diversion mechanism and form a single-line queue in the slides; S6: Particles enter the discharge pipe through the end of the slide. The counting component counts the particles passing through the discharge pipe. When the count value of the counting component reaches the single filling quantity, the control mechanism controls the pushing component to move, and the blocking plate blocks the discharge pipe to complete the single quantitative filling. When the count value does not reach the single filling quantity, the blocking plate remains open, allowing the particles to continue falling and completing the filling action.

[0062] Furthermore, the set value of the screen oscillation frequency in step S2 above is determined as follows: Obtain the particle size d of the currently screened particles and the corresponding friction coefficient f(d), and calculate the critical oscillation frequency fmin according to the following formula:

[0063] Where g is the acceleration due to gravity, Lh is the horizontal lever arm from the pivot to the connection point of the swing crossbar, α is the reference tilt angle of the screen, s is the average distance of the particles from the pivot, and r is the crank eccentricity of the drive mechanism. Set the screen oscillation frequency f to:

[0064] in For safety reasons, .

[0065] The discharge tilt angle in steps S3 and S4 is determined as follows: Calculate the discharge tilt angle using the following formula. :

[0066] Among them, among them, To install a reference angle for the screen, Add a camber angle to the crankshaft at its extreme positions. For safety margin angle, .

[0067] It is worth noting that, taking the water pellets to be screened as an example, the particle size d = 3 mm, the corresponding friction coefficient f(d) = 0.35, the horizontal lever arm length from the pivot to the connection point of the swing crossbar is Lh = 120 mm, the screen reference inclination angle α = 3°, and the average distance between the particles and the pivot 5 is s = 400 mm. Substituting these values ​​into the above formula yields... Finally, substituting the above results into the formula for calculating the screen oscillation frequency, we get f = 1.35 × 32 ≈ 43 times / minute, where k1 is taken as 1.35.

[0068] The above are merely exemplary embodiments of the present invention and do not limit the scope of the patent of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A screening and filling device for multi-specification spherical particles, characterized in that, include: Supporting main body (1); The screening mechanism (2) is provided on the supporting body (1) and includes a screening frame (21) and screens (22) provided on the screening frame (21). Multiple screens (22) are provided at intervals from top to bottom. The aperture of the multiple screens (22) decreases from top to bottom. The screening frame (21) is provided with a discharge port (3). Each screen (22) corresponds to a discharge port (3). The discharge ports (3) corresponding to adjacent screens (22) are arranged in opposite directions. The screening frame (21) is provided with a feed inlet (4). The feed inlet (4) is provided with a feed funnel. The drive mechanism (5) is located on the back side of the screening mechanism (2) and includes a drive component (51) and a linkage component (52). The drive component (51) is located on the support body (1) and connected to the linkage component (52) to drive the linkage component (52) to swing back and forth. The linkage component (52) is connected to each layer of the screen (22) to drive each layer of the screen (22) to swing synchronously. The feeding mechanism (6) is located on one side of the screening frame (21) where the discharge port (3) is located, and is used to control the opening and closing of the discharge port (3) on the same side; The diversion mechanism (7) is located on one side of the screening mechanism (2), and has independent diversion channels (71) inside. Each discharge port (3) corresponds to one diversion channel (71). A filling mechanism (8) is located below the diversion mechanism (7) and is used to receive the particles discharged by the diversion mechanism (7) and quantitatively fill them into the container. A flow guiding mechanism (9) is provided in the flow distribution channel (71) for guiding particles in the flow distribution channel (71); as well as The control mechanism (10) is electrically connected to the drive mechanism (5), the feeding mechanism (6) and the filling mechanism (8), and is used to control the swing parameters of the drive mechanism (5), the opening and closing of the feeding mechanism (6) and the quantitative filling of the filling mechanism (8).

2. The screening and filling device for multi-specification spherical particles as described in claim 1, characterized in that, The linkage component (52) includes a rigid connector (521) and a swing plate (522); The rigid connector (521) is provided on both sides of the screen (22) and is rotatably connected to each layer of the screen (22); The middle part of the swing plate (522) is mounted on the support body (1) via a pivot (11), and the two ends of the swing plate (522) are rotatably connected to the rigid connector (521).

3. The screening and filling device for multi-specification spherical particles as described in claim 2, characterized in that, The drive assembly (51) includes a motor (511) and a transmission component (512), wherein the motor (511) is fixedly mounted on the support body (1); The transmission component (512) includes a first gear (5121) and a second gear (5122); the first gear (5121) is a sector gear and is fixedly connected to the output shaft of the motor (511); The second gear (5122) is located below the first gear (5121) and meshes with the first gear (5121). The second gear (5122) is coaxially arranged with the pivot (11) and rotates synchronously.

4. The screening and filling device for multi-specification spherical particles as described in claim 1, characterized in that, The feeding mechanism (6) includes a baffle assembly (61) and a lifting assembly (62). The lifting assembly (62) is located on the support body (1) below both sides of the screening mechanism (2). The baffle assembly (61) is located at the extended end of the lifting assembly (62). The baffle assembly (61) includes baffle plates (611) corresponding to a plurality of discharge ports (3) on the same side, and the baffle plates (611) are movably configured to open or close the corresponding discharge ports (3).

5. The screening and filling device for multi-specification spherical particles as described in claim 1, characterized in that, The flow guiding mechanism (9) includes a guide plate (91), and each of the flow diversion channels (71) is provided with a corresponding guide plate (91), and the guide plate (91) is inclined.

6. The screening and filling device for multi-specification spherical particles as described in claim 1, characterized in that, The filling mechanism (8) includes: The flow control component (81) is located below the flow diversion mechanism (7) and includes multiple slides (811) with different inner diameters for guiding particles in the slides (811); A push component (82) is located below the slide (811) and is connected to the end of the slide (811) via a drop pipe (13) to control the amount of granular material falling. A counting component (83) is disposed on the pushing component (82) for controlling the filling quantity of particles; A conveying assembly (84) is located below the discharge pipe (13) for conveying filling containers.

7. The screening and filling device for multi-specification spherical particles as described in claim 6, characterized in that, The pushing component (82) includes a material blocking plate (821) and a pushing cylinder (822). The pushing cylinder (822) is mounted on the support body (1), and the material blocking plate (821) is mounted on the extended end of the pushing cylinder (822). The material blocking plate (821) blocks the material drop pipe (13) under the action of the pushing cylinder (822).

8. A control method, characterized in that, The screening and filling apparatus as described in claims 1-7 includes the following steps: S1: Obtain the particle size specification information of the particles to be screened, and call the corresponding preset formula parameters in the control mechanism. The preset formula parameters include the screen oscillation frequency, discharge tilt angle, discharge sequence and single filling quantity. S2: Control the drive mechanism to drive the multi-layer screen to swing synchronously back and forth at the screen swing frequency, so that the mixed particle size particles are screened in layers on each screen. S3: After screening is completed, control the drive mechanism to tilt the screen as a whole to the discharge tilt angle in the first direction, and control the discharge mechanism to open the discharge port in the first direction so that particles of different sizes on the same side are discharged through the corresponding discharge pipe. S4: Control the drive mechanism to tilt the screen in the second direction to the discharge tilt angle, and control the discharge mechanism to open the discharge port in the second direction so that particles of different sizes are discharged through the corresponding discharge pipes. The first direction is opposite to the second direction. S5: Particles of different sizes enter the respective slides in the slow-flow component through the corresponding diversion mechanism and form a single-line queue in the slides; S6: Particles enter the discharge pipe through the end of the slide. The counting component counts the particles passing through the discharge pipe. When the count value of the counting component reaches the single filling quantity, the control mechanism controls the pushing component to move, and the blocking plate blocks the discharge pipe to complete the single quantitative filling. When the count value does not reach the single filling quantity, the blocking plate remains open, allowing the particles to continue falling and completing the filling action.

9. The control method as described in claim 8, characterized in that, In step S2, the set value of the screen oscillation frequency is determined in the following way: Obtain the particle size d of the currently screened particles and the corresponding friction coefficient f(d), and calculate the critical oscillation frequency f using the following formula. min : Where g is the acceleration due to gravity, Lh is the horizontal lever arm from the pivot to the connection point of the swing crossbar, α is the reference tilt angle of the screen, s is the average distance of the particles from the pivot, and r is the crank eccentricity of the drive mechanism. The screen oscillation frequency f is set to: in For safety reasons, .

10. The control method as described in claim 8, characterized in that, In S3 and S4, the discharge tilt angle is determined in the following way: Calculate the discharge tilt angle using the following formula. : Among them, among them, To install a reference angle for the screen, Add a camber angle to the crankshaft at its extreme positions. For safety margin angle, .

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