A multi-stage cache type continuous feeding device for grain processing and a control method thereof

Abstract

The present application relates to material conveying and automatic control technical field, disclose a kind of multi-level cache type continuous feeding device and control method for grain processing, including storage bin, steady flow bin, multi-channel rotation feeding assembly and load response flow regulating assembly.Adjusting cylinder is continuously rotated, so that multiple feeding channels are sequentially communicated with converging channel, and continuous flow is formed by the partial overlap of adjacent feeding channel discharge period.Taking the material load borne by load response separation layer as feedback, taking the through-flow gap of feeding channel as adjusting quantity;When material load decreases, increase through-flow gap to increase feeding amount, when material load increases, reduce through-flow gap, so that the material inventory in steady flow bin tends to be stable.When flow is interrupted and not restored within the preset time, excitation coil drives throttle lining and reciprocating motion of disturbing rod to dredge.The present application can realize continuous feeding, negative feedback steady flow and non-stop dredging.

Description

Technical Field

[0001] This invention relates to the field of material conveying and automatic control technology, and in particular to a multi-stage buffered continuous feeding device and control method for grain processing. Background Technology

[0002] Grain processing production lines typically include processes such as raw grain cleaning, destoning, drying, hulling, milling, screening, color sorting, and packaging. The processing capacity and operating cycle time differ between adjacent processing equipment. For example, the output of elevators, cleaning equipment, or batch drying equipment may be intermittent and fluctuate in flow, while downstream equipment such as rice hullers, rice mills, and screening equipment usually require a relatively continuous and stable material supply. Therefore, grain processing production lines typically include storage silos or buffer silos to temporarily store upstream grain and supply it to downstream equipment.

[0003] Existing feeding devices mostly use a single storage silo with a bottom discharge port, unloading valve, or screw feeder for feeding. To absorb intermittent feed from upstream equipment, the storage silo generally needs a certain storage capacity. However, grain is a granular material. When the grain storage volume in the silo is large or the storage time is long, the grain near the bottom outlet is easily affected by factors such as inter-particle friction, silo wall constraints, changes in material moisture content, entanglement of light impurities, and localized compaction, leading to bridging, arching, or partial blockage at the discharge point. Especially when using a single discharge channel, if the discharge channel is obstructed, it can easily lead to a feed interruption in downstream equipment.

[0004] To mitigate the impact of grain blockage on feeding continuity, some feeding devices incorporate vibrators, stirring rods, or multiple discharge ports at the bottom of the silo. Vibration or stirring structures typically agitate the material as a whole after blockage occurs. However, when the material near the outlet is already relatively compacted, the resistance to movement of a single agitator is significant, making it difficult to directly disengage the stable interlocking of particles at the throttling point. While multiple discharge ports can mitigate the risk of failure from a single outlet, simultaneous opening of multiple ports can easily lead to excessive instantaneous discharge, causing rapid material accumulation in the lower silo. If separate valves are used for independent control, the structure and control process become complex, and the flow capacity of each discharge port typically cannot automatically adjust to changes in the downstream buffer material volume.

[0005] Furthermore, existing storage silos typically serve two functions simultaneously: storing large quantities of material and providing a stable supply to downstream equipment. Larger storage capacity helps absorb fluctuations in upstream material inflows, but it also easily leads to a persistently high-fill, easily compacted state in the silo's discharge area. While reducing the silo's storage capacity can lower the risk of blockages near the outlet, it makes it difficult to maintain downstream equipment operation when upstream material feeding temporarily stops or the discharge channel experiences short-term anomalies. Therefore, it is difficult to simultaneously achieve optimal storage capacity, stable flow at low material levels, and continuous material supply under blockage conditions.

[0006] Therefore, there is an urgent need for a continuous feeding device for grain processing that can separate the upstream intermittent material storage process from the downstream continuous feeding process, and form multiple feeding channels that work in rotation while limiting the instantaneous feeding amount; when some feeding channels experience poor material discharge, the device can use the remaining feeding channels and downstream buffer materials to maintain the feeding, and automatically adjust the flow capacity of the feeding channels according to the changes in the buffer materials, so as to reduce the possibility of local blockage developing into overall feeding interruption. Summary of the Invention

[0007] This invention aims to solve the problems of bridging and blockage in existing grain feeding devices and the difficulty in maintaining continuous feeding, and provides a multi-stage buffered continuous feeding device and control method for grain processing.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage buffered continuous feeding device for grain processing, comprising: Storage silos; A flow stabilizing bin is located below the storage bin, and a discharge port is provided at the bottom of the flow stabilizing bin; A multi-channel alternating feeding assembly is disposed between the storage bin and the flow stabilizing bin. The multi-channel alternating feeding assembly includes multiple feeding channels, a confluence channel, an regulating cylinder, and a drive motor. The feed ends of the multiple feeding channels are respectively connected to the storage bin, and the discharge ends of the multiple feeding channels are arranged at intervals along the circumference of the regulating cylinder. The regulating cylinder is arranged between the discharge ends of the multiple feeding channels and the confluence channel, and has a guide port connecting its inner and outer sides. The interior of the regulating cylinder is connected to the flow stabilizing bin through the confluence channel. The drive motor is used to drive the regulating cylinder to rotate continuously, so that the guide port is connected to multiple feeding channels in sequence. The feeding channels not connected to the guide port are closed by the cylinder wall of the regulating cylinder. A material flow detection element is provided in the confluence channel. And a load response flow adjustment component, the load response flow adjustment component including a load response partition layer formed by multiple movable bearing parts, and multiple flow adjustment components respectively disposed in multiple feeding channels; The load response separation layer is used to jointly support the same material layer located on its upper side, and has a material passage gap for material to enter its lower side. The stabilizing chamber is equipped with a material level detection device. The plurality of flow regulating members are respectively drivenly connected to the plurality of movable bearing parts and respectively form flow gaps with the inner wall of the corresponding feeding channel, so as to increase the plurality of flow gaps when the material load borne by the load response separation layer decreases, and decrease the plurality of flow gaps when the material load increases.

[0009] Preferably, the effective storage volume of the flow stabilizing bin is smaller than the effective storage volume of the storage bin; The multiple feeding channels are arranged in a ring array around the rotation axis of the regulating cylinder, and the feeding ends of the multiple feeding channels are spaced apart along the bottom of the storage bin.

[0010] Preferably, the discharge ends of the plurality of feeding channels each form an adjustment window facing the adjustment cylinder; The regulating cylinder is a cylindrical structure that is closed at the top and open at the bottom. The lower end of the regulating cylinder is connected to the confluence channel, and the guide port is opened on the cylinder wall of the regulating cylinder. The guide port is an arc-shaped opening extending circumferentially along the regulating cylinder. When the guide port turns from one regulating window to the next adjacent regulating window, the guide port has at least partially overlapped with the next regulating window before it completely separates from the previous regulating window.

[0011] Preferably, the load response separation layer includes a plurality of material support plates arranged in a ring array and a plurality of lever arms fixedly connected to the plurality of material support plates respectively; Multiple lever arms are rotatably installed in the flow stabilizing chamber, and multiple material support plates jointly support the same material layer, with the material passage gap formed between two adjacent material support plates; The load response partition layer divides the interior of the stabilizing chamber into a buffer chamber located on its upper side and a stabilizing chamber located on its lower side.

[0012] Preferably, each of the flow regulating components includes a throttling liner and a baffle rod fixed to the throttling liner; The throttling liner is movably arranged along the axial direction of the corresponding feeding channel. The feeding channel is provided with a throttling section that gradually narrows along the material conveying direction. The throttling liner has a conical surface corresponding to the throttling section. The conical surface forms an annular flow gap with the inner wall of the throttling section, and the material swaying rod extends from the throttling liner to the feed end of the feeding channel.

[0013] Preferably, the load response flow adjustment assembly further includes multiple guide sleeves, multiple telescopic rods, and multiple transmission links; Multiple guide sleeves are respectively fixed to the bottom of the storage bin, and multiple telescopic rods are respectively slidably installed in the corresponding guide sleeves; One end of each telescopic rod is fixedly connected to the corresponding throttling liner, and the other end is rotatably connected to a lever arm away from its rotation fulcrum via a corresponding transmission link, so as to transfer the material load borne by the corresponding material support plate to the throttling liner.

[0014] Preferably, an excitation coil is provided inside the guide sleeve, and a driving magnetic sleeve is provided on the telescopic rod; The excitation coil is used to apply axial electromagnetic force to the drive magnetic sleeve to adjust the balance position of the throttling liner under material load, and can drive the telescopic rod, throttling liner and material swaying rod to reciprocate along the axial direction of the feeding channel.

[0015] Preferably, the driving magnetic sleeve is a permanent magnet sleeve magnetized along the axial direction of the telescopic rod, and the excitation coil changes the axial electromagnetic force applied to the driving magnetic sleeve by changing the magnitude and direction of the input current; When the excitation coil is input with a pulse current or a current whose direction changes alternately, it drives the throttling liner and the material swaying rod to reciprocate along the axial direction of the feeding channel.

[0016] This invention also proposes a control method for a multi-stage buffered continuous feeding device for grain processing, which includes the following steps: S1. Control the drive motor to drive the regulating cylinder to rotate continuously, so that the guide port is connected to multiple feeding channels in sequence, each feeding channel obtains the discharge period in sequence, and feeds material to the stabilizing silo through the confluence channel; S2. Using the material load borne by the load response partition layer as the feedback quantity and the flow gap of the feeding channel as the adjustment quantity, the flow gap is increased when the material load decreases and decreased when the material load increases, so that the material load on the upper side of the load response partition layer tends to stabilize. S3. When the material flow detection device fails to detect any material passing through the confluence channel within the preset self-recovery time, a pulse current or a current with alternating direction is input to the excitation coil to drive the throttling liner and the material disturbance rod to reciprocate along the axial direction of the material replenishment channel, and the regulating cylinder is kept rotating continuously during the active unblocking process.

[0017] The present invention has the following beneficial effects: 1. This invention establishes a multi-channel rotating feeding assembly between the storage silo and the flow stabilization silo. The continuous rotation of the regulating cylinder connects multiple feeding channels sequentially and periodically to the confluence channel, preventing the grain in the storage silo from being discharged through a single outlet for extended periods. Feeding channels not connected to the guide outlet are sealed by the regulating cylinder wall, allowing only the currently connected channel to discharge. This limits the instantaneous discharge volume, preventing large amounts of material from concentrating in the flow stabilization silo. Furthermore, it ensures that if bridging or blockage occurs in some feeding channels, the remaining channels can continue feeding, reducing the risk of a single channel failure causing overall supply interruption.

[0018] 2. This invention uses multiple support plates to form a load-response separation layer, allowing multiple support plates to jointly support the same material layer in the stabilizing chamber, and transmitting the overall load change of the material layer to multiple throttling liners. When the replenishment amount is insufficient or the material on the upper side of the load-response separation layer decreases, multiple throttling liners move in the direction of increasing the flow gap, causing the normal replenishment channel currently connected to the guide port to automatically increase the discharge amount; the replenishment channel not connected to the guide port will pre-increase the flow gap while remaining closed, until the guide port rotates to the corresponding position before discharging material, thereby realizing adaptive replenishment that combines overall material inventory feedback with the rotational release of each replenishment channel.

[0019] 3. This invention sets the throttling liner and the material disturbance rod as a synchronously moving structure, allowing the blocked feeding channel to periodically regain the opportunity to discharge material during the continuous rotation of the regulating cylinder. When the material load borne by the load response separation layer changes, the throttling liner repeatedly changes the flow gap between itself and the inner wall of the feeding channel, and drives the material disturbance rod to disturb the dense material in the feeding channel, thereby disrupting the stable interlocking and bridging stress state between grain particles at the blockage location. Even if the blockage is not cleared in one cycle, gap adjustment and material disturbance can be continuously implemented in subsequent cycle cycles, improving the device's ability to automatically resume discharge without shutting down the machine.

[0020] 4. This invention buffers material flow fluctuations caused by the rotation, partial blockage, and clearing process of the feeding channels through a flow stabilizing bin. Even when some feeding channels experience short-term insufficient discharge, the flow stabilizing bin can still utilize its internally stored material to continue supplying downstream equipment. Simultaneously, the material load borne by the load response separation layer is used as feedback, and the flow gap of the feeding channels is used as adjustment. When the material load decreases, the flow gap is increased to increase the feeding amount; when the material load increases, the flow gap is decreased to reduce the feeding amount, thus forming a negative feedback flow stabilizing regulation. When the material flow detection element fails to detect material passing through the confluence channel within a preset self-recovery time, the excitation coil drives the throttling liner and the material-disrupting rod to reciprocate, thus strengthening the clearing of the feeding channels. This forms a graded fault-tolerant mechanism combining negative feedback regulation of material load, multi-cycle self-recovery, electromagnetic active clearing, and continuous feeding from the flow stabilizing bin, reducing downtime for cleaning and feeding interruptions caused by grain bridging blockage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the multi-stage buffered continuous feeding device for grain processing of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the storage silo and flow stabilization silo of the present invention.

[0023] Figure 3This is a cross-sectional three-dimensional structural diagram of the storage bin and multi-channel rotating replenishment component of the present invention.

[0024] Figure 4 This is a perspective three-dimensional structural diagram of the flow stabilization chamber and load response separation layer of the present invention.

[0025] Figure 5 This is a schematic cross-sectional view of the flow stabilization chamber of the present invention, showing the material distribution on the upper and lower sides of the load response separation layer.

[0026] Figure 6 This is a front cross-sectional view of the relative positions of the storage bin, the multi-channel rotating replenishment component, and the flow stabilization bin of the present invention.

[0027] Figure 7 This is a partial cross-sectional view of the material storage bin and multi-channel rotating material replenishment assembly of the present invention.

[0028] In the diagram: 100, storage bin; 200, flow stabilizing bin; 201, material level detection device; 301, material replenishment channel; 302, confluence channel; 303, regulating cylinder; 304, drive motor; 305, material flow detection device; 306, regulating window; 307, guide port; 401, load response partition layer; 402, flow regulating device; 403, flow gap; 404, material support plate; 405, lever arm; 406, throttling liner; 407, material disturbance rod; 408, guide sleeve; 409, telescopic rod; 410, transmission connecting rod; 411, drive magnetic sleeve. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Example 1 Reference Figure 1 , Figure 2 and Figure 6 This embodiment describes the overall structure and installation method of a multi-stage buffered continuous feeding device for grain processing.

[0032] like Figure 1As shown, the continuous feeding device includes a storage silo 100, a flow stabilizing silo 200, a multi-channel alternating feeding assembly disposed between the storage silo 100 and the flow stabilizing silo 200, and a load response flow regulating assembly disposed within the flow stabilizing silo 200. The storage silo 100 is positioned above the flow stabilizing silo 200, and both can be mounted together on a support frame. The storage silo 100 is used to receive grain materials intermittently, periodically, or with fluctuating flow rates from elevators, cleaning equipment, destoning equipment, drying equipment, or manual feeding terminals. The flow stabilizing silo 200 is used to receive grain materials output from the multi-channel alternating feeding assembly and feeds them to downstream processing equipment through its bottom outlet.

[0033] In this embodiment, the grain material being processed can be paddy rice, brown rice, wheat, corn, sorghum, or other granular grains that can fall under gravity. The continuous feeding device is preferably located between the initial grain cleaning, destoning or magnetic separation process and the hulling process, or it can be located between the paddy rice and brown rice separation process and the rice milling process, or between the batch drying and cooling process and the subsequent continuous cleaning, dehulling or milling process.

[0034] The effective storage volume of the stabilizing silo 200 is smaller than that of the storage silo 100. The storage silo 100 handles the centralized storage of intermittent upstream material, while the stabilizing silo 200 only maintains the material level required for continuous downstream operation. This ensures that the material column effect and compaction degree in the discharge area at the bottom of the stabilizing silo 200 are lower than when material is directly discharged downstream from the storage silo 100. The effective buffer capacity of the stabilizing silo 200 can be determined based on the rotation cycle, self-recovery time, active unblocking time of the multi-channel rotating replenishment components, and the material consumption per unit time of downstream equipment. This ensures that even when the replenishment channel 301 experiences short-term insufficient discharge, the stabilizing silo 200 can still continue to supply material to downstream equipment.

[0035] The confluence channel 302 is located below the multi-channel rotating feeding assembly, and its outlet is connected to the upper part of the stabilizing flow bin 200. A material flow detection element 305 is installed inside the confluence channel 302. The material flow detection element 305 is used to detect whether grain is passing through the confluence channel 302 and whether the material flow is continuously interrupted. The material flow detection element 305 can be a photoelectric material sensor, a capacitive material sensor, an impact material flow sensor, or other detection elements capable of detecting the flow of particulate material.

[0036] A material level detection element 201 is installed inside the steady flow bin 200. The material level detection element 201 is used to detect the material quantity or level status within the steady flow bin 200. The material level detection element 201 can be positioned above the load response separation layer 401, and can also be configured with high and low material level detection positions according to control requirements. The material flow detection element 305, the material level detection element 201, the drive motor 304, and the excitation coil (described later) can be electrically connected to a controller. The controller can be a programmable logic controller, an industrial controller, or a control module with corresponding input / output functions.

[0037] It should be noted that, Figure 1 The ladder, maintenance platform, support frame, and terminal feeding structure at the bottom of the stabilizing bin 200 shown can be set up according to the on-site layout of the grain processing production line. They are mainly used for installation, maintenance, and feeding the material in the stabilizing bin 200 into downstream equipment, and do not constitute a limitation on the core feeding structure of the present invention.

[0038] Example 2 Reference Figure 3 , Figure 6 and Figure 7 This embodiment describes the structure and rotation process of the multi-channel rotating material feeding assembly, based on embodiment 1.

[0039] The multi-channel alternating feeding assembly includes multiple feeding channels 301, a confluence channel 302, an regulating cylinder 303, and a drive motor 304. The multiple feeding channels 301 are arranged in a circular array around the rotation axis of the regulating cylinder 303, and the feed ends of the multiple feeding channels 301 are spaced apart along the bottom of the storage silo 100, so that the multiple feeding channels 301 receive materials from different positions at the bottom of the storage silo 100, reducing the possibility of a single local arch bridge simultaneously blocking all feeding channels 301.

[0040] like Figure 3 and Figure 7 As shown, the discharge ends of multiple feeding channels 301 respectively form adjustment windows 306 facing the adjustment cylinder 303. The adjustment cylinder 303 is a cylindrical structure with a closed upper end and an open lower end, and its lower end is connected to the confluence channel 302; the cylinder wall of the adjustment cylinder 303 has guide ports 307 connecting the inner and outer sides of the adjustment cylinder 303. The drive motor 304 can be connected to the adjustment cylinder 303 through a reducer and a transmission shaft to drive the adjustment cylinder 303 to rotate continuously around its axis.

[0041] As the regulating cylinder 303 rotates continuously, the guide port 307 passes through multiple regulating windows 306 in sequence. The regulating window 306 opposite to the guide port 307 is in the open state. The grain in the corresponding feeding channel 301 enters the regulating cylinder 303 under the action of gravity through the regulating window 306 and the guide port 307, and then enters the confluence channel 302 from the lower end of the regulating cylinder 303. The other regulating windows 306 that are not connected to the guide port 307 are blocked by the cylinder wall of the regulating cylinder 303. Although the corresponding feeding channel 301 remains in the storage state, it cannot discharge material into the confluence channel 302.

[0042] The guide port 307 is preferably an arc-shaped opening extending circumferentially along the regulating cylinder 303. The circumferential length of the arc-shaped opening is greater than the circumferential interval between adjacent regulating windows 306, so that when the guide port 307 turns from one regulating window 306 to the next adjacent regulating window 306, it has at least partially overlapped with the next regulating window 306 before completely disengaging from the previous regulating window 306. As a result, the discharge periods of two adjacent feeding channels 301 partially overlap during the handover phase, reducing the instantaneous material interruption in the confluence channel 302 caused by channel switching.

[0043] In this embodiment, the drive motor 304 operates at a preset continuous speed. The rotation of the regulating cylinder 303 is mainly used to enable each feeding channel 301 to periodically obtain a discharge period, rather than using the speed of the drive motor 304 as the main adjustment amount to change the flow gap 403. The gravity discharge capacity of a single feeding channel 301 during its discharge period is mainly determined by the flow gap 403 within the feeding channel 301, the flowability of the grain, and the material state within the storage bin 100.

[0044] When one of the feeding channels 301 experiences partial bridging or blockage, the regulating cylinder 303 does not stop rotating. During the period when the blocked feeding channel 301 is connected to the guide port 307, it discharges a small amount of material or no material at all. After the regulating cylinder 303 continues to rotate, the subsequent unblocked feeding channels 301 can still discharge material sequentially through the guide port 307 to the confluence channel 302. Therefore, a partial failure of a single feeding channel 301 will not directly cause a single point of material interruption in the entire device.

[0045] Example 3 Reference Figures 4 to 7 Based on the above embodiments, this embodiment describes the load response separation layer 401, the flow regulating component 402, and their transmission relationship.

[0046] The load response partition layer 401 is disposed within the flow stabilization chamber 200 and includes multiple material support plates 404 arranged in a ring array and multiple lever arms 405 fixedly connected to the multiple material support plates 404 respectively. Each lever arm 405 is mounted on the chamber wall or support structure of the flow stabilization chamber 200 through a rotation fulcrum, so that the corresponding material support plate 404 can swing at a small angle around the rotation fulcrum with the lever arm 405. The multiple material support plates 404 together form an approximately complete partition layer, and a material passage gap is maintained between adjacent material support plates 404.

[0047] like Figure 5 As shown, the load response partition layer 401 divides the interior of the stabilizing chamber 200 into a buffer chamber located on its upper side and a stabilizing chamber located on its lower side. Grain entering the stabilizing chamber 200 through the confluence channel 302 first enters the buffer chamber and forms a continuous material layer on the upper side of the multiple support plates 404. Grain in the buffer chamber continuously enters the stabilizing chamber through the material passage gaps between adjacent support plates 404, and is then discharged from the outlet at the bottom of the stabilizing chamber 200. The multiple support plates 404 do not correspond to separate local material receiving chambers, but rather jointly support the same material layer in the buffer chamber. Therefore, the load on the multiple support plates 404 collectively reflects the overall material storage in the upper part of the stabilizing chamber 200.

[0048] Each flow regulating component 402 includes a throttling liner 406 and a deflector rod 407 fixed to the throttling liner 406. The throttling liner 406 is movably arranged along the axial direction of the corresponding feeding channel 301. The feeding channel 301 is provided with a throttling section that gradually narrows along the material conveying direction. The throttling liner 406 has a conical surface corresponding to the throttling section, and an annular flow gap 403 is formed between the conical surface and the inner wall of the throttling section. When the throttling liner 406 moves axially along the feeding channel 301, the radial distance between the conical surface and the inner wall of the throttling section changes, thereby increasing or decreasing the flow gap 403. The deflector rod 407 extends from the throttling liner 406 toward the feed end of the feeding channel 301 and moves synchronously with the throttling liner 406.

[0049] The load response flow control assembly also includes multiple guide sleeves 408, multiple telescopic rods 409, and multiple transmission links 410. The guide sleeves 408 are fixed to the bottom structure of the storage silo 100, and the telescopic rods 409 slide axially along the corresponding guide sleeves 408. One end of the telescopic rod 409 is fixedly connected to the corresponding throttling liner 406, and the other end is rotatably connected to a lever arm 405 away from its pivot point via the transmission link 410. Thus, changes in the material load borne by the support plate 404 can be transmitted to the corresponding throttling liner 406 via the lever arm 405, the transmission link 410, and the telescopic rod 409.

[0050] like Figure 7As shown, an excitation coil is installed inside the guide sleeve 408, and a driving magnetic sleeve 411 is installed on the telescopic rod 409. The driving magnetic sleeve 411 is preferably a permanent magnet sleeve magnetized along the axial direction of the telescopic rod 409. In the adaptive adjustment state, a preset excitation current is input to the excitation coil, applying an axial electromagnetic force to the driving magnetic sleeve 411 that balances the force transmitted by the material support plate 404, enabling the throttling liner 406 to achieve dynamic equilibrium within a certain axial stroke. For different materials such as rice, brown rice, wheat, or corn, the magnitude of the excitation current can be changed to alter the initial equilibrium position of the throttling liner 406 and the adjustment sensitivity of the flow gap 403.

[0051] When the same material layer in the buffer chamber thickens, the overall material load borne by the multiple support plates 404 increases. Each support plate 404 drives the corresponding lever arm 405 to swing, and through the transmission link 410 and the telescopic rod 409, the multiple throttling liners 406 tend to move in the direction of reducing the flow gap 403, thereby limiting the subsequent material replenishment. When the material layer in the buffer chamber thins, the overall material load borne by the multiple support plates 404 decreases, and the axial electromagnetic force exerted by the excitation coil on the drive magnetic sleeve 411 becomes relatively dominant, causing the multiple throttling liners 406 to move in the direction of increasing the flow gap 403. Since the multiple support plates 404 support the same material layer, each throttling liner 406 has the same adjustment tendency, but slight positional differences are allowed due to the instantaneous force differences of each support plate 404.

[0052] It should be noted that when multiple throttling liners 406 move in the direction of increasing the flow gap 403, not all feeding channels 301 will discharge material simultaneously. Feeding channels 301 not connected to the guide port 307 remain closed by the cylinder wall of the regulating cylinder 303, and their throttling liners 406 only perform pre-adjustment of the opening; only when the guide port 307 rotates to the corresponding regulating window 306 will the feeding channel 301 discharge material according to the pre-adjusted flow gap 403. Thus, the load response flow regulating component is used to adjust the discharge capacity of each feeding channel 301, and the regulating cylinder 303 is used to sequentially release the feeding channels 301 that actually participate in the discharge.

[0053] Example 4 Reference Figures 5 to 7 This embodiment, based on the above embodiments, describes the continuous feeding, adaptive compensation, and cyclic self-recovery process of blocked channels.

[0054] Before starting the device, the grain to be processed is added to the storage silo 100, and the buffer chamber and stabilizing chamber of the flow stabilizing silo 200 are initially filled with material. After the drive motor 304 starts, the regulating cylinder 303 rotates continuously at a preset speed. Each feeding channel 301 periodically discharges material into the confluence channel 302 according to the rotation sequence of the regulating cylinder 303. For the confluence channel 302, a continuous or nearly continuous material flow is formed. The confluence channel 302 collects the grain output from each feeding channel 301 and introduces it into the flow stabilizing silo 200. The flow stabilizing silo 200 continuously supplies material to downstream processing equipment through the bottom discharge port.

[0055] Under normal conditions, the total amount of material supplied by multiple feeding channels 301 within a rotation cycle is dynamically balanced with the discharge amount of the flow stabilizing chamber 200. The material layer on the upper side of the load response separation layer 401 remains within the target thickness range, and multiple throttling liners 406 remain in their respective equilibrium positions. As the regulating cylinder 303 rotates continuously, the feeding channel 301 currently connected to the guide port 307 discharges material according to its flow gap 403, while other feeding channels 301 remain closed.

[0056] When upstream feeding stops briefly, the discharge rate of a certain feeding channel 301 decreases, or a feeding channel 301 becomes blocked, the total feeding rate of multiple feeding channels 301 may temporarily be less than the discharge rate of the stabilizing chamber 200. The grain in the buffer chamber still enters the stabilizing chamber through the material gaps between the support plates 404. As the load response layer above the partition layer 401 gradually thins, the overall material load borne by the multiple support plates 404 decreases. Consequently, the multiple throttling liners 406 all tend to move towards increasing the flow gap 403.

[0057] For the feeding channel 301 that is currently connected to the guide port 307 and is not blocked, the increased flow gap 403 improves its single discharge capacity, thereby compensating for the material gap caused by insufficient discharge from some channels. For the feeding channel 301 that is not yet connected to the guide port 307, the cylinder wall of the regulating cylinder 303 still prevents grain from entering the confluence channel 302, but the corresponding throttling liner 406 has been adjusted to a position with a larger flow gap 403; when the guide port 307 subsequently rotates to the feeding channel 301, the feeding channel 301 can discharge material according to the increased flow gap 403.

[0058] When the throttling liner 406 moves towards increasing the flow gap 403, it directly changes the geometric distance between the conical surface of the throttling liner 406 and the inner wall of the throttling section, reducing the clamping and squeezing of stuck grain particles. The disturbance rod 407 moves synchronously with the throttling liner 406, disturbing the grain that is in a dense state above the throttling liner 406. Every time the regulating cylinder 303 rotates, the blocked feeding channel 301 regains a chance to discharge material through the guide port 307. Even if the blockage is not completely cleared in the first or first few cycles, the throttling liner 406 and the disturbance rod 407 can continue to change the stress state of the blocked area in subsequent cycles, gradually loosening the blockage and restoring discharge.

[0059] During the self-recovery cycle of the blocked channel 301, the regulating cylinder 303 continues to rotate, and other unblocked feeding channels 301 continue to feed material into the stabilizing chamber 200. The stabilizing chamber 200 uses the existing grain in the buffer chamber and the stabilizing chamber to absorb short-term feeding fluctuations. Therefore, local blockages will not immediately lead to material shortages in downstream equipment, and the device can complete normal channel compensation and multi-cycle self-recovery of blocked channels without shutting down.

[0060] When the blocked channel 301 resumes discharge, the total feed amount of the confluence channel 302 increases, the material layer in the buffer chamber gradually recovers, and the material load borne by the load response separation layer 401 increases accordingly. Multiple throttling liners 406 retract in the direction of reducing the flow gap 403 to prevent the continuous accumulation of material in the stabilizing chamber 200. This forms a negative feedback regulation process with the overall material load on the upper part of the stabilizing chamber 200 as the feedback quantity.

[0061] Example 5 Reference Figures 1 to 7 This embodiment describes the control method and active unblocking process of the continuous feeding device. The control method includes continuous feeding, adaptive negative feedback adjustment, and active unblocking. The adaptive negative feedback adjustment is performed synchronously during the continuous feeding process, and the active unblocking is executed when the device fails to restore the material flow within a preset time by relying on load response adjustment.

[0062] S1. Continuous feeding. The controller controls the drive motor 304 to run continuously, keeping the regulating cylinder 303 rotating continuously. The guide port 307 connects sequentially to multiple feeding channels 301, allowing each feeding channel 301 to receive its discharge time in the order of the regulating cylinder 303's rotation. Feeding channels 301 not connected to the guide port 307 are closed by the cylinder wall of the regulating cylinder 303. Because the guide ports 307 have partially overlapping connection times between adjacent regulating windows 306, the next feeding channel 301 begins discharging before the previous one has completely stopped, thus forming a continuous or nearly continuous material flow within the confluence channel 302. The confluence channel 302 transports the grain to the stabilizing silo 200, which supplies material to downstream processing equipment through its bottom outlet.

[0063] S2. Adaptive negative feedback adjustment. During the continuous process of S1, the grain in the buffer chamber enters the flow stabilizing chamber through the material passage gap between adjacent material support plates 404. Multiple material support plates 404 jointly bear the material load of the same material layer above them. In this embodiment, the material load borne by the load response separation layer 401 is used as the feedback quantity, and the flow gap 403 in the feeding channel 301 is used as the adjustment quantity.

[0064] When the material load borne by the load response partition layer 401 decreases, each material support plate 404 moves the corresponding throttling liner 406 in the direction of increasing the flow gap 403 via the lever arm 405, the transmission link 410 and the telescopic rod 409, so as to increase the subsequent material supply. When the material load borne by the material increases, each throttling liner 406 moves in the direction of decreasing the flow gap 403 to reduce the subsequent material supply, so that the material load on the upper side of the load response partition layer 401 tends to stabilize.

[0065] The feeding channel 301 currently connected to the guide port 307 discharges material according to the adjusted flow gap 403. The feeding channel 301 not connected to the guide port 307 remains closed and the flow gap 403 is pre-adjusted until the guide port 307 rotates to the feeding channel 301.

[0066] Therefore, when the material load decreases, the amount of material replenishment is increased by increasing the flow gap 403, causing the material load to rebound; when the material load increases, the amount of material replenishment is reduced by decreasing the flow gap 403, causing the material load to decrease, thus forming a negative feedback regulation process with the material load as the feedback quantity.

[0067] The material flow detection element 305 continuously monitors the material flow status within the confluence channel 302. When the material flow detection element 305 detects a short-term decrease or interruption in material flow followed by recovery, the controller keeps the drive motor 304 running continuously without immediately outputting an overall material replenishment anomaly signal, allowing the device to continue self-recovering through load response adjustment and multi-cycle rotation. The preset self-recovery time is preferably no less than one complete cycle of the regulating cylinder 303, and can be set to multiple cycle times depending on the number of material replenishment channels 301, the rotation speed of the regulating cylinder 303, and the type of grain.

[0068] S3. Active Unblocking. When the material flow detection element 305 fails to detect material passage within the preset self-recovery time, it indicates an abnormality in the overall material supply capacity of multiple material supply channels 301. The controller inputs pulse current or alternating current to multiple excitation coils. The excitation coils apply a periodically changing axial electromagnetic force to the corresponding drive magnetic sleeve 411, causing the drive magnetic sleeve 411 to drive the telescopic rod 409, the throttling liner 406, and the material disturbance rod 407 to reciprocate along the axial direction of the material supply channel 301. The reciprocating motion of the throttling liner 406 repeatedly changes the flow gap 403, and the material disturbance rod 407 synchronously disturbs the dense material in the material supply channel 301 to enhance the unblocking of bridging or blocked materials.

[0069] Since this embodiment does not rely on the rotational position of the regulating cylinder 303 to identify the specific abnormal feeding channel 301, pulse current or alternating current can be input to multiple excitation coils simultaneously during active unblocking. At this time, the blocked feeding channel 301 is unblocked by the reciprocating motion of the throttling liner 406 and the material guide rod 407. Although the unblocked feeding channel 301 also produces corresponding axial movement, it still discharges material according to the rotation sequence of the regulating cylinder 303. During the active unblocking process, the drive motor 304 continues to run, and the regulating cylinder 303 continues to rotate, so that the unblocked or undamaged feeding channels 301 continue to feed material into the flow stabilizing chamber 200.

[0070] It should be noted that the axial electromagnetic force applied by the excitation coil to the driving magnetic sleeve 411 can also be transmitted to the corresponding material support plate 404 via the telescopic rod 409, the transmission connecting rod 410, and the lever arm 405, causing the material support plate 404 to oscillate slightly. The oscillation of the material support plate 404 can disturb the material on the upper side of the load response separation layer 401 and cause dynamic changes in the material passage gap between adjacent material support plates 404, thereby reducing the possibility of grain forming bridging or local stagnation on the upper side of the load response separation layer 401 and promoting the material to enter the stabilizing chamber from the buffer chamber. Thus, the active clearing process can simultaneously disturb the blocked material in the feeding channel 301 and the material on the upper side of the load response separation layer 401 in the stabilizing chamber 200.

[0071] When the material flow detection element 305 detects continuous material flow again, the controller stops inputting pulse current or alternating current to the excitation coil, restoring the excitation coil to the basic excitation state required for normal operation, and the device returns to S1 and S2. If, after a preset active clearing time or a preset number of clearing cycles, the material flow detection element 305 still does not detect material flow, and the material level detection element 201 detects that the material in the stabilizing silo 200 is below the preset safe material level, the controller outputs a manual intervention prompt and may reduce the discharge speed of the feeding mechanism at the bottom outlet of the stabilizing silo 200, or control the downstream equipment to shut down in an orderly manner.

[0072] In this embodiment, the material flow detection element 305 may detect a signal interruption caused by insufficient material in the storage silo 100, a stoppage of the drive motor 304, or other abnormal material supply. Therefore, the signal output by the controller is preferably defined as an overall abnormal material supply signal, rather than directly limited to a blockage in all material supply channels 301. The operator can make further judgments based on the material status in the storage silo 100, the operating status of the drive motor 304, and the material level status in the stabilizing silo 200.

[0073] Working principle: This invention utilizes a storage silo 100 to absorb intermittent or fluctuating incoming materials from upstream, and a smaller flow stabilizing silo 200 to maintain a low material level buffer required for continuous downstream supply. A drive motor 304 drives an adjusting cylinder 303 to rotate continuously, allowing multiple feeding channels 301 to sequentially receive material during their discharge periods. A load-response partition layer 401 supports the same material layer within the buffer chamber of the flow stabilizing silo 200 and adjusts multiple flow gaps 403 according to changes in the overall material load. When supply is insufficient, the multiple flow gaps 403 increase, improving the discharge capacity of currently open normal feeding channels 301, while closed feeding channels 301 undergo pre-adjustment of their opening. Blocked channels 301 gradually self-recover during multiple cycles through the movement of a throttling liner 406 and a material-disrupting rod 407. When self-recovery fails to restore material flow within a preset time, an excitation coil drives the throttling liner 406 and the material-disrupting rod 407 to reciprocate, actively clearing the blockage. The flow stabilizing silo 200 and the remaining normal feeding channels 301 continue to maintain downstream supply during the clearing process.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage buffered continuous feeding device for grain processing, characterized in that, include: Storage bin (100); A flow stabilizing bin (200) is disposed below the storage bin (100), and a discharge port is provided at the bottom of the flow stabilizing bin (200); A multi-channel alternating feeding assembly is disposed between the storage bin (100) and the flow stabilizing bin (200). The multi-channel alternating feeding assembly includes multiple feeding channels (301), a confluence channel (302), an regulating cylinder (303), and a drive motor (304). The feed ends of the multiple feeding channels (301) are respectively connected to the storage bin (100), and the discharge ends of the multiple feeding channels (301) are arranged at intervals along the circumference of the regulating cylinder (303). The regulating cylinder (303) is located between the discharge ends of the multiple feeding channels (301) and the confluence channel (302), and has a guide port (307) connecting its inner and outer sides. The interior of the regulating cylinder (303) is connected to the flow stabilizing bin (200) through the confluence channel (302). The drive motor (304) is used to drive the regulating cylinder (303) to rotate continuously, so that the guide port (307) is connected to multiple feeding channels (301) in sequence. The feeding channels (301) not connected to the guide port (307) are closed by the cylinder wall of the regulating cylinder (303). The confluence channel (302) is provided with a material flow detection element (305). And a load response flow adjustment component, the load response flow adjustment component including a load response partition layer (401) formed by multiple movable bearing parts, and multiple flow adjustment components (402) respectively disposed in multiple feeding channels (301). The load response partition layer (401) is used to jointly support the same material layer located on its upper side and has a material passage gap for material to enter its lower side. The stabilizing chamber (200) is provided with a material level detection element (201). The plurality of flow regulating members (402) are respectively connected to the plurality of movable bearing parts and form flow gaps (403) with the inner wall of the corresponding feeding channel (301) respectively, so as to increase the plurality of flow gaps (403) when the material load borne by the load response separation layer (401) decreases, and decrease the plurality of flow gaps (403) when the material load increases.

2. The multi-stage buffered continuous feeding device for grain processing according to claim 1, characterized in that: The effective storage volume of the flow stabilizing bin (200) is smaller than the effective storage volume of the storage bin (100); Multiple feeding channels (301) are arranged in a ring array around the rotation axis of the regulating cylinder (303), and the feeding ends of the multiple feeding channels (301) are spaced apart along the bottom of the storage bin (100).

3. The multi-stage buffered continuous feeding device for grain processing according to claim 1, characterized in that: The discharge ends of the multiple feeding channels (301) respectively form adjustment windows (306) facing the adjustment cylinder (303). The regulating cylinder (303) is a cylindrical structure with a closed upper end and an open lower end. The lower end of the regulating cylinder (303) is connected to the confluence channel (302), and the guide port (307) is opened on the cylinder wall of the regulating cylinder (303). The guide port (307) is an arc-shaped opening extending circumferentially along the regulating cylinder (303). When the guide port (307) turns from one regulating window (306) to the next adjacent regulating window (306), the guide port (307) has at least partially overlapped with the next regulating window (306) before completely disengaging from the previous regulating window (306).

4. The multi-stage buffered continuous feeding device for grain processing according to claim 1, characterized in that: The load response separation layer (401) includes a plurality of material support plates (404) arranged in a ring array and a plurality of lever arms (405) fixedly connected to the plurality of material support plates (404). Multiple lever arms (405) are rotatably installed in the flow stabilizing chamber (200), and multiple material support plates (404) jointly support the same material layer, with the material passage gap formed between two adjacent material support plates (404); The load response partition layer (401) divides the interior of the stabilizing chamber (200) into a buffer chamber located on its upper side and a stabilizing chamber located on its lower side.

5. A multi-stage buffered continuous feeding device for grain processing according to claim 4, characterized in that: Each of the aforementioned flow regulating components (402) includes a throttling liner (406) and a baffle rod (407) fixed to the throttling liner (406). The throttling liner (406) is movably arranged along the axial direction of the corresponding feeding channel (301). The feeding channel (301) is provided with a throttling section that gradually narrows along the material conveying direction. The throttling liner (406) has a conical surface corresponding to the throttling section. An annular flow gap (403) is formed between the conical surface and the inner wall of the throttling section, and the material guide bar (407) extends from the throttling liner (406) to the feed end of the feeding channel (301).

6. A multi-stage buffered continuous feeding device for grain processing according to claim 5, characterized in that: The load response flow control assembly also includes multiple guide sleeves (408), multiple telescopic rods (409), and multiple transmission links (410). Multiple guide sleeves (408) are fixed to the bottom of the storage bin (100), and multiple telescopic rods (409) are slidably installed in the corresponding guide sleeves (408); One end of each telescopic rod (409) is fixedly connected to the corresponding throttling liner (406), and the other end is rotatably connected to a lever arm (405) away from its rotation fulcrum via a corresponding transmission link (410) so as to transfer the material load borne by the corresponding material support plate (404) to the throttling liner (406).

7. A multi-stage buffered continuous feeding device for grain processing according to claim 6, characterized in that: An excitation coil is provided inside the guide sleeve (408), and a drive magnetic sleeve (411) is provided on the telescopic rod (409). The excitation coil is used to apply an axial electromagnetic force to the drive magnetic sleeve (411) to adjust the balance position of the throttling liner (406) under the action of material load, and can drive the telescopic rod (409), the throttling liner (406) and the material swaying rod (407) to reciprocate along the axial direction of the feeding channel (301).

8. A multi-stage buffered continuous feeding device for grain processing according to claim 7, characterized in that: The driving magnetic sleeve (411) is a permanent magnet sleeve that is magnetized along the axial direction of the telescopic rod (409). The excitation coil changes the axial electromagnetic force applied to the driving magnetic sleeve (411) by changing the magnitude and direction of the input current. When the excitation coil is input with a pulse current or a current with alternating directions, it drives the throttling liner (406) and the material feeder (407) to reciprocate axially along the feeding channel (301).

9. A control method for a multi-stage buffered continuous feeding device for grain processing, characterized in that, The multi-stage buffered continuous feeding device for grain processing as described in claim 7 or 8 includes the following steps: S1, Continuous feeding: Drive the regulating cylinder (303) to rotate continuously, so that the guide port (307) on the regulating cylinder (303) is connected to multiple feeding channels (301) in sequence, so that each feeding channel (301) obtains the discharge time period in sequence according to the rotation order of the regulating cylinder (303), and the discharge time periods of adjacent feeding channels (301) overlap at least partially to reduce the instantaneous material interruption in the confluence channel (302); the feeding channels (301) not connected to the guide port (307) are closed by the cylinder wall of the regulating cylinder (303), and the confluence channel (302) conveys the material to the flow stabilizing bin (200), and the flow stabilizing bin (200) supplies material to downstream equipment through its discharge port; S2, Adaptive Negative Feedback Adjustment: During the continuous execution of S1, the material located on the upper side of the load response partition layer (401) enters the lower side of the load response partition layer (401) through the material passage gap between adjacent material support plates (404), and the material load borne by the load response partition layer (401) is used as the feedback quantity, and the flow gap (403) of the feeding channel (301) is used as the adjustment quantity; when the feedback quantity decreases, multiple material support plates (404) respectively drive the corresponding throttling liner (406) to increase the flow gap (403) through the lever arm (405), transmission link (410) and telescopic rod (409). The direction of the movement increases the amount of material fed into the feeding channel (301) currently connected to the guide port (307); when the feedback amount increases, multiple throttling liner plates (406) move in the direction of reducing the flow gap (403), thereby reducing the amount of material fed into the feeding channel (301) currently connected to the guide port (307) so that the material load on the upper side of the load response partition layer (401) tends to stabilize; the feeding channel (301) not connected to the guide port (307) is closed by the cylinder wall of the regulating cylinder (303) and the adjusted flow gap (403) is maintained until the guide port (307) rotates to the feeding channel (301); S3. Active Unblocking: When the material flow detection device (305) detects that the material flow signal in the confluence channel (302) is interrupted and does not recover within the preset self-recovery time, it inputs pulse current or current with alternating direction to multiple excitation coils, so that the drive magnetic sleeve (411) drives the telescopic rod (409), the throttling liner (406) and the material disturbance rod (407) to reciprocate along the axial direction of the corresponding feeding channel (301), so as to change the flow gap (403) between the throttling liner (406) and the inner wall of the feeding channel (301) and disturb the material in the feeding channel (301); during the active unblocking process, the regulating cylinder (303) is kept rotating continuously so that the feeding channel (301) that has not been blocked continues to feed material to the flow stabilizing chamber (200).

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