A quantitative filling machine for rice processing and a filling method thereof

Abstract

The application provides a quantitative filling machine for rice processing and a filling method thereof, and belongs to the technical field of rice processing and filling. The quantitative filling machine for rice processing comprises a supporting structure, a quantitative structure and a conveying structure. The supporting structure comprises a storage bin, a supporting plate and a supporting rod, two flow guide chambers are formed in the storage bin, an electronic scale is embedded in the inside of the limiting groove, and a flow guide pipe is fixedly penetrated through the bottom of the limiting groove; the quantitative structure comprises a rotating block and a stepping motor, the inside of the rotating block is circumferentially formed with a quantitative hole, the stepping motor is installed at the bottom of the supporting plate and connected with the rotating block through a transmission member; and the belt conveyor is located below the flow guide pipe. In the filling process, the filling specification can be preset, so as to adapt to different filling requirements, and the filling can be carried out in two directions, which is beneficial to improving the filling efficiency and more efficient and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of rice processing and filling technology, and more specifically, to a quantitative filling machine for rice processing and its filling method. Background Technology

[0002] Rice is a major grain crop in my country. The rice processing production process mainly includes hulling, milling, screening, polishing, and filling and packaging. Among these, quantitative filling is the core process at the end of rice processing, directly determining the packaging precision, appearance quality, and market price of rice products. With the large-scale and automated development of the grain processing industry, traditional manual filling methods can no longer meet the needs of modern production. Automated quantitative filling machines have been widely used in rice processing production lines.

[0003] Currently, existing rice quantitative filling machines on the market still have many shortcomings in actual use: Firstly, the quantitative method is singular, mostly using fixed volume silos or single weighing and metering structures, which can only be adapted to filling a single specification of rice and cannot quickly switch between different filling specifications. The equipment has poor versatility, and the production changeover cost for enterprises is high. At the same time, the filling efficiency is relatively low due to the use of a single channel for feeding and filling. Therefore, it is necessary to propose a quantitative filling machine for rice processing and its filling method to solve the above problems. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a quantitative filling machine for rice processing and its filling method, aiming to improve the many defects that existing quantitative filling machines for rice still have in actual use: First, the quantitative method is singular, mostly using fixed volume silos or single weighing and metering structures, which can only be adapted to filling a single specification of rice, and cannot quickly switch between different filling specifications, resulting in poor equipment versatility and high production changeover costs for enterprises. At the same time, the use of a single channel for feeding and filling results in relatively low filling efficiency.

[0005] This invention is implemented as follows:

[0006] This invention provides a quantitative filling machine for rice processing and its filling method, including a support structure, a quantitative structure and a conveying structure.

[0007] The supporting structure includes a storage bin, a support plate, and a support rod. The storage bin has two flow chambers extending into it. A discharge pipe is fixedly connected to the bottom of each flow chamber, and a pneumatic gate valve is installed on the discharge pipe. The support plate is connected to the storage bin via a fixing plate. A limit groove is formed on the surface of the support plate, and an electronic scale is embedded inside the limit groove. A flow pipe is fixedly connected through the bottom of the limit groove. The support rod is fixed to the bottom of the support plate. The metering structure includes a rotating block and a stepper motor. A metering hole is formed circumferentially inside the rotating block. The stepper motor is installed at the bottom of the support plate and connected to the rotating block via a transmission component. The conveying structure includes a belt conveyor and a positioning component. A bracket is fixed to the bottom of the belt conveyor, and the positioning component is installed at one end of the belt conveyor. The belt conveyor is located below the flow pipe.

[0008] In one embodiment of the present invention, four support rods are symmetrically arranged, a pad is fixed to the bottom of each support rod, a reinforcing rod is fixed between the four support rods, and one end of the belt conveyor is mounted on the reinforcing rod.

[0009] In one embodiment of the present invention, the upper end of the guide tube is truncated into a frustum shape, and the upper end of the guide tube is matched with the metering orifice.

[0010] In one embodiment of the present invention, protective members are installed on both sides of the fixing plate. The protective members include a protective plate and a connecting plate. The connecting plate is fixed to both sides of the storage bin. A bolt passes through the protective plate and the connecting plate. The end of the bolt is threaded with a nut. The bottom of the protective plate is in contact with the surface of the support plate.

[0011] In one embodiment of the present invention, a rotating column is fixed to the bottom of the rotating block, the rotating column is rotatably connected inside the limiting groove, and the rotating block is slidably connected to the inner surface of the limiting groove.

[0012] In one embodiment of the present invention, the transmission component includes a gear ring and a transmission gear. The gear ring is fixed on the rotating block, and the transmission gear is keyed to the end of the output shaft of the stepper motor. The transmission gear meshes with the gear ring.

[0013] In one embodiment of the present invention, a placement area is formed on the conveyor belt of the belt conveyor, and the placement area is distributed at equal intervals.

[0014] In one embodiment of the present invention, the positioning element includes two threaded posts and a locking knob. The two threaded posts are fixed to both sides of one end of the belt conveyor, and a limit plate is rotatably connected to the two threaded posts. The locking knob is threadedly connected to the end of the threaded posts.

[0015] In one embodiment of the present invention, an automated control component is further included. The automated control component includes a PLC controller, a touch screen, an electromagnetic reversing valve, a stepper driver, a contactor, and several detection sensors. The pneumatic gate valve is electrically connected to the PLC controller via the electromagnetic reversing valve. The stepper motor is electrically connected to the PLC controller via the stepper driver. The belt conveyor is electrically connected to the PLC controller via the contactor. The electronic scale is connected to the PLC controller via the PLC's signal acquisition module.

[0016] The detection sensors include a material level sensor and a container photoelectric sensor; the material level sensor is fixedly installed inside the guide chamber of the storage silo to monitor the amount of rice stored in the silo; the container photoelectric sensor is fixed beside the guide pipe and above the filling station of the belt conveyor to detect the arrival signal of the packaging container in the placement area and feed it back to the PLC.

[0017] The stepper driver has a built-in encoder acquisition module. The encoder is installed on the stepper motor. The encoder signal is fed back to the PLC controller via the stepper driver. The PLC accurately controls the rotation position of the rotating block based on the feedback signal.

[0018] A filling method for a quantitative filling machine for rice processing includes the following steps:

[0019] Step S1: Power-on self-test and process parameter preset: Upon power-on, the PLC controller automatically completes a self-test, sequentially checking the communication and operational status of the electromagnetic reversing valve, stepper driver, contactor, electronic scale, level sensor, and photoelectric sensor. After confirming no faults, it enters standby mode. The operator inputs the standard weight and cycle time parameters for this filling operation via the touchscreen display. The PLC automatically stores the corresponding production process formula, completing the pre-filling parameter settings. Simultaneously, based on the packaging container specifications, the positioning element at one end of the belt conveyor is fine-tuned, and the limiting plate is used to complete container positioning, ensuring filling alignment accuracy.

[0020] Step S2, Material Storage and Intelligent Level Monitoring: The rice to be filled is put into the two guide chambers inside the storage silo. The material level sensor built into the storage silo collects the material storage signal in real time and transmits it to the PLC controller. When the material level is lower than the set low level, the system triggers a replenishment reminder to realize automatic replenishment. When the material level reaches the high level threshold, feeding is stopped to ensure the material storage in the storage silo is stable and to avoid material shortage shutdown or material overflow.

[0021] Step S3, Automatic Container Conveying and Arrival Detection: The PLC controller controls the belt conveyor to start operation via a contactor. Empty packaging containers are sequentially transported forward from the equidistant placement areas on the belt conveyor. When a container is transported to the filling station directly below the guide pipe, the photoelectric sensor at the station detects the container arrival signal and feeds it back to the PLC. The PLC immediately controls the contactor to disconnect, and the belt conveyor stops instantly, waiting for the filling operation. At the same time, the system locks the filling process to prevent empty container feeding or spillage.

[0022] Step S4: Automatic valve opening and feeding, precise filling of the metering orifice: After the container is positioned, the PLC controller outputs a control signal to connect the solenoid reversing valve. The solenoid reversing valve switches the air path and drives the pneumatic gate valve on the discharge pipe to open automatically. The rice in the storage bin guide chamber falls along the discharge pipe and falls precisely into the metering orifice directly below. The electronic scale at the bottom of the metering orifice fixes the volume and completes the pre-quantitative filling of rice. After the preset filling time, the PLC controls the solenoid reversing valve to cut off the air and reset, the pneumatic gate valve closes, and feeding stops, completing the single-volume quantitative storage.

[0023] Step S5, Precise Indexing and Automatic Alignment: After feeding, the PLC controller sends pulse and direction signals to the stepper driver, which drives the stepper motor to operate precisely. The stepper motor drives the rotating block to rotate smoothly inside the limiting groove through the meshing of the transmission gear and the gear ring. With the position feedback of the motor encoder, the rotation angle is precisely controlled so that the metering hole filled with rice is precisely aligned with the upper frustum interface of the guide tube. After alignment, the rice inside the metering hole falls vertically along the guide tube by its own weight and is automatically poured into the packaging container at the lower station.

[0024] Step S6, Real-time Weighing Closed-Loop Intelligent Correction: Throughout the filling process, the electronic scale embedded in the limiting groove transmits filling weight data to the PLC in real time through the signal module. The PLC compares the data with the preset standard weight parameters in real time to form an intelligent closed-loop compensation: When the filling weight approaches the set threshold, the system adaptively fine-tunes the opening time of the pneumatic gate valve and the single feeding amount to correct the quantitative error; if there are deviations in multiple consecutive sets of filling data, the system automatically memorizes and updates the process parameters to achieve self-tuning correction, ensuring that the filling weight of each can of rice is uniform and accurate.

[0025] Step S7, Continuous Cyclic Filling Operation: After a single filling is completed, the PLC releases the conveyor lock and restarts the belt conveyor via the contactor to transport the filled finished container out, while simultaneously moving the next empty container to the filling station. At the same time, the rotating block continues to rotate in increments, and the empty metering orifice rotates back to below the discharge pipe, repeating the feeding, metering, unloading, and weighing calibration process to achieve uninterrupted automated cyclic filling.

[0026] Step S8, Fault Warning and Shutdown Protection: During the operation of the whole machine, the PLC monitors the operating status of each component in real time. If faults such as material shortage in the storage bin, no container at the workstation, motor overload, or abnormal weighing occur, the system will immediately trigger an audible and visual alarm, simultaneously suspend the filling process, lock the equipment operation, and production can only continue after the fault is resolved. After the production operation is completed, the machine can be stopped with one click, and the system will automatically record the production data for easy data traceability and equipment cleaning and maintenance.

[0027] The beneficial effects of this invention are as follows: After the equipment is powered on and completes its self-test, the filling specifications are preset by an electronic scale, the filling process parameters are preset by the operator, the rice is filled into the storage silo by an external device, and the material level sensor monitors the material storage in the silo in real time to ensure sufficient production materials; the belt conveyor transports the packaging containers in an orderly manner in the placement area, and the containers are positioned and aligned by positioning components. When the photoelectric sensor detects that the container has accurately reached the filling station below the guide pipe, the PLC controller controls the belt conveyor to stop and lock the station through a contactor;

[0028] Subsequently, the PLC controller opens the pneumatic gate valve on the discharge pipe via an electromagnetic reversing valve. Rice from the storage hopper falls into the metering orifice of the rotating block, and the volume is pre-calculated by an electronic scale. After filling, the pneumatic gate valve closes to stop the flow. The PLC drives a stepper motor via a stepper driver, which, through the meshing of a transmission gear and a gear ring, drives the rotating block to rotate precisely within the limiting groove, ensuring that the metering orifice containing rice is precisely aligned with the guide pipe. The rice falls into the packaging container by its own weight. During the filling process, the electronic scale embedded in the limiting groove feeds back the filling weight data to the PLC in real time via a signal module. The PLC dynamically fine-tunes the opening duration of the pneumatic gate valve based on preset parameters, achieving closed-loop weight calibration and eliminating minor errors caused by volume measurement. After a single filling is completed, the PLC unlocks the workstation, controls the belt conveyor to restart, delivers the finished container and transports the next empty container, and simultaneously the empty metering orifice rotates back to its original position, entering the next filling cycle. During the production process, this allows for preset filling specifications to adapt to different filling needs. It also enables bidirectional filling, which improves filling efficiency and makes the product more efficient and convenient to use. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a quantitative filling machine for rice processing provided in an embodiment of the present invention;

[0031] Figure 2 A schematic cross-sectional view of a quantitative filling machine for rice processing provided in an embodiment of the present invention;

[0032] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 This is a partially exploded structural diagram of a quantitative filling machine for rice processing provided in an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the conveying structure of a quantitative filling machine for rice processing provided in an embodiment of the present invention;

[0035] Figure 6 For the present invention Figure 5 Enlarged view of section B in the middle.

[0036] In the diagram: 100-Support structure; 110-Storage bin; 120-Discharge pipe; 121-Pneumatic gate valve; 130-Support plate; 131-Limiting groove; 132-Electronic scale; 133-Guide pipe; 140-Support rod; 141-Reinforcing rod; 150-Fixing plate; 160-Protective component; 161-Protective plate; 162-Connecting plate; 163-Bolt; 164-Nut; 200-Quantitative structure; 210-Rotating block; 211-Quantitative orifice; 220-Stepper motor; 230-Transmission component; 231-Gear ring; 232-Transmission gear; 300-Conveying structure; 310-Belt conveyor; 311-Placement area; 320-Bracket; 330-Positioning component; 331-Threaded column; 332-Limiting plate; 333-Locking knob. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example

[0039] Please see Figures 1-6 The present invention provides a technical solution: a quantitative filling machine for rice processing and a filling method thereof, comprising a support structure 100 and a quantitative structure 200 and a conveying structure 300 installed on the support structure 100.

[0040] Please see Figures 1-3 The support structure 100 includes a storage bin 110, a support plate 130, and a support rod 140. The storage bin 110 forms two flow chambers inside. The bottom of the flow chambers is connected to and fixed with a discharge pipe 120. A pneumatic gate valve 121 is installed on the discharge pipe 120. The support plate 130 is connected to the storage bin 110 through a fixing plate 150. A limit groove 131 is formed on the surface of the support plate 130. An electronic scale 132 is embedded in the limit groove 131. A flow pipe 133 is fixed through the bottom of the limit groove 131. The support rod 140 is fixed to the bottom of the support plate 130.

[0041] Four support rods 140 are symmetrically arranged, with a pad fixed to the bottom of each support rod 140. A reinforcing rod 141 is fixed between the four support rods 140. One end of the belt conveyor 310 is mounted on the reinforcing rod 141. The support rods 140 support the entire device and improve its overall strength. The upper end of the guide pipe 133 is truncated cone-shaped and matches the metering orifice 211. This truncated cone shape allows for more complete feeding, and the larger upper end and smaller lower end of the guide pipe 133 reduces the feeding area, preventing rice from splashing during filling. Protective components 160 are installed on both sides of the fixing plate 150, and the protective components 160 are in contact with the surface of the support plate 130. The protective component 160 includes a protective plate 161 and a connecting plate 162. The connecting plate 162 is fixed to both sides of the storage bin 110. A bolt 163 passes through the protective plate 161 and the connecting plate 162. The end of the bolt 163 is threaded with a nut 164. The bottom of the protective plate 161 is in contact with the surface of the support plate 130. The protective plate 161 and the connecting plate 162 have round holes corresponding to the bolt 163 inside, which facilitates disassembly and assembly and makes it easy to test the internal components.

[0042] Please see Figure 1 , Figure 2and Figure 4 The quantitative structure 200 includes a rotating block 210 and a stepper motor 220. The rotating block 210 has a circumferentially formed quantitative hole 211 inside. The stepper motor 220 is installed at the bottom of the support plate 130 and is connected to the rotating block 210 through a transmission component 230.

[0043] A rotating column is fixed to the bottom of the rotating block 210. The rotating column is rotatably connected inside the limiting groove 131. The rotating block 210 is slidably connected to the inner surface of the limiting groove 131. A bearing is interference-fitted onto the rotating column and embedded inside the limiting groove 131, which facilitates the rotation of the rotating block 210. The transmission component 230 includes a gear ring 231 and a transmission gear 232. The gear ring 231 is fixed to the rotating block 210, and the transmission gear 232 is keyed to the end of the output shaft of the stepper motor 220. The transmission gear 232 meshes with the gear ring 231. Here, the transmission component 230, in conjunction with the stepper motor 220, can intermittently drive the two rotating blocks 210 to rotate simultaneously, which can speed up the filling process.

[0044] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 The conveying structure 300 includes a belt conveyor 310 and a positioning element 330. A bracket 320 is fixed at the bottom of the belt conveyor 310, and the positioning element 330 is installed at one end of the belt conveyor 310. The belt conveyor 310 is located below the guide pipe 133.

[0045] The conveyor belt of the belt conveyor 310 has placement areas 311 formed on its conveyor belt. These placement areas 311 are evenly spaced, and their spacing allows for positioning of the packaging cans, thus improving filling accuracy. The positioning component 330 includes two threaded posts 331 and a locking knob 333. The two threaded posts 331 are fixed to both sides of one end of the belt conveyor 310. Limiting plates 332 are rotatably connected to the two threaded posts 331. The locking knob 333 is threaded to the end of the threaded posts 331. By rotating the two limiting plates 332, they are shaped into a figure-eight shape. Then, the locking knob 333 is pressed against the surface of the limiting plates 332 for positioning and fixing. This ensures that the packaging cans are in the center position, improving filling accuracy.

[0046] The present invention also includes an automation control component, which includes a PLC controller, a touch screen, an electromagnetic reversing valve, a stepper driver, a contactor, and several detection sensors; the pneumatic gate valve 121 is electrically connected to the PLC controller via the electromagnetic reversing valve, the stepper motor 220 is electrically connected to the PLC controller via the stepper driver, the belt conveyor 310 is electrically connected to the PLC controller via the contactor, and the electronic scale 132 is connected to the PLC controller via the PLC's signal acquisition module.

[0047] The detection sensors include a material level sensor and a container photoelectric sensor. The material level sensor is fixedly installed inside the flow chamber of the storage silo 110 to monitor the amount of rice stored in the silo. The container photoelectric sensor is fixed on the side of the flow pipe 133 and above the filling station of the belt conveyor 310 to detect the arrival signal of the packaging container in the placement area 311 and feed it back to the PLC.

[0048] The stepper driver has a built-in encoder acquisition module. The encoder is installed on the stepper motor 220. The encoder signal is fed back to the PLC controller via the stepper driver. The PLC accurately controls the rotation position of the rotating block 210 based on the feedback signal.

[0049] A screening method for a quantitative filling machine for rice processing includes the following steps:

[0050] Step S1: Power-on self-test and process parameter preset: Upon power-on, the PLC controller automatically completes a self-test, sequentially checking the communication and operational status of the solenoid reversing valve, stepper driver, contactor, electronic scale 132, material level sensor, and photoelectric sensor. After confirming no faults, it enters standby mode. The operator inputs the standard weight parameters and cycle time parameters for this filling operation via the touchscreen display. The PLC automatically stores the corresponding production process formula, completing the parameter settings before filling. Simultaneously, based on the packaging container specifications, the positioning component 330 at one end of the belt conveyor 310 is fine-tuned, and the limit plate 332 is used to complete the container positioning, ensuring filling alignment accuracy.

[0051] Step S2, Material Storage and Intelligent Level Monitoring: The rice to be filled is put into the two guide chambers inside the storage silo 110. The material level sensor built into the storage silo 110 collects the material storage signal in real time and transmits it to the PLC controller. When the material level is lower than the set low level, the system triggers a replenishment reminder to realize automatic replenishment. When the material level reaches the high level threshold, feeding stops to ensure the material storage in the storage silo 110 is stable and avoids material shortage shutdown or material overflow.

[0052] Step S3, Automatic Container Conveying and Arrival Detection: The PLC controller starts the belt conveyor 310 via a contactor. Empty packaging containers are sequentially carried forward by the equidistant placement areas 311 on the conveyor belt of the belt conveyor 310. When the container is conveyed to the filling station directly below the guide pipe 133, the photoelectric sensor at the station detects the container arrival signal and feeds it back to the PLC. The PLC immediately controls the contactor to disconnect, and the belt conveyor 310 stops instantly, waiting for the filling operation. At the same time, the system locks the filling process to prevent empty container feeding and material spillage.

[0053] Step S4: Automatic valve opening and feeding, precise filling of metering orifice 211: After the container is positioned, the PLC controller outputs a control signal to connect the solenoid reversing valve. The solenoid reversing valve switches the air path and drives the pneumatic gate valve 121 on the discharge pipe 120 to open automatically. The rice in the guide chamber of the storage bin 110 falls along the discharge pipe 120 and falls precisely into the metering orifice 211 directly below. The electronic scale 132 at the bottom of the metering orifice 211 is used to fix the volume and complete the pre-order amount of rice filling. After the preset filling time, the PLC controls the solenoid reversing valve to cut off the air and reset, the pneumatic gate valve 121 closes, and the feeding stops, completing the single volume metering storage.

[0054] Step S5, precise indexing and automatic alignment and feeding: After feeding is completed, the PLC controller sends pulse and direction signals to the stepper driver, which drives the stepper motor 220 to operate precisely. The stepper motor 220 drives the rotating block 210 to rotate smoothly inside the limiting groove 131 through the meshing of the transmission gear 232 and the gear ring 231. With the position feedback of the motor encoder, the rotation angle is precisely controlled so that the metering hole 211 filled with rice is precisely aligned with the upper frustum interface of the guide tube 133. After alignment, the rice inside the metering hole 211 falls vertically along the guide tube 133 by its own weight and is automatically poured into the packaging container in the lower station.

[0055] Step S6, Real-time Weighing Closed-Loop Intelligent Correction: Throughout the filling process, the electronic scale 132 embedded in the limit groove 131 transmits filling weight data to the PLC in real time through the signal module. The PLC compares the data with the preset standard weight parameters in real time to form an intelligent closed-loop compensation: When the filling weight approaches the set threshold, the system adaptively fine-tunes the opening time of the pneumatic gate valve 121, fine-tunes the single feeding amount, and corrects the quantitative error; if there are deviations in multiple sets of filling data, the system automatically memorizes and updates the process parameters to achieve self-tuning correction, ensuring that the filling weight of each can of rice is uniform and accurate.

[0056] Step S7, Continuous Cyclic Filling Operation: After a single filling is completed, the PLC releases the conveyor lock and restarts the belt conveyor 310 via the contactor to transport the filled finished container out, while simultaneously moving the next empty container to the filling station. At the same time, the rotating block 210 continues to rotate in increments, and the empty metering orifice 211 rotates back to below the discharge pipe 120, repeating the feeding, metering, unloading, and weighing calibration process to achieve uninterrupted automated cyclic filling.

[0057] Step S8, Fault Warning and Shutdown Protection: During the operation of the whole machine, the PLC monitors the operating status of each component in real time. If a fault occurs such as material shortage in storage bin 110, no container at the workstation, motor overload, or abnormal weighing, the system will immediately trigger an audible and visual alarm, simultaneously suspend the filling process, lock the equipment operation, and production can only continue after the fault is resolved. After the production operation is completed, the machine can be stopped with one click, and the system will automatically record the production data for easy data traceability and equipment cleaning and maintenance.

[0058] Specifically, the working principle of this quantitative filling machine for rice processing is as follows: When in use, after the equipment is powered on and completes its self-test, the operator presets the filling process parameters. The storage bin 110 is filled with rice through external equipment. The material level sensor monitors the material storage in the bin in real time to ensure sufficient production materials. The belt conveyor 310 uses the placement area 311 to orderly transport the packaging containers and uses the positioning component 330 to limit and align the containers. When the photoelectric sensor detects that the container has accurately reached the filling station below the guide pipe 133, the PLC controller controls the belt conveyor 310 to stop and lock the station through the contactor. Subsequently, the PLC controller opens the pneumatic gate valve 121 on the discharge pipe 120 via the electromagnetic reversing valve. Rice in the storage bin 110 falls into the metering hole 211 of the rotating block 210 and is pre-filled by the electronic scale 132. After filling, the pneumatic gate valve 121 closes to stop the flow. The PLC drives the stepper motor 220 through the stepper driver, which in turn drives the rotating block 210 to rotate precisely within the limiting groove 131 via the transmission gear 232 and the gear ring 231. This ensures that the metering hole 211 containing rice is precisely aligned with the guide pipe 133, and the rice falls into the packaging container by its own weight. During the filling process, the electronic scale 132 embedded in the limiting groove 131 feeds back the filling weight data to the PLC in real time via the signal module. The PLC dynamically adjusts the opening time of the pneumatic gate valve 121 based on preset parameters to achieve closed-loop weight calibration and eliminate minor errors caused by volume measurement. After a single filling cycle is completed, the PLC unlocks the workstation and controls the belt conveyor 310 to restart, delivering the finished container and transporting the next empty container. Simultaneously, the empty metering orifice 211 rotates to its reset position, initiating the next filling cycle. During production, this allows for pre-setting filling specifications to accommodate different filling needs. Furthermore, bidirectional filling is possible, improving efficiency and making the process more efficient and convenient.

[0059] It should be noted that the specific models and specifications of the pneumatic gate valve 121, electronic scale 132, stepper motor 220 and belt conveyor 310 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0060] The power supply and operating principle of the pneumatic gate valve 121, electronic scale 132, stepper motor 220 and belt conveyor 310 are clear to those skilled in the art and will not be described in detail here.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A quantitative filling machine for rice processing, comprising a support structure (100) and a quantitative structure (200) and a conveying structure (300) mounted on the support structure (100), characterized in that, The support structure (100) includes a storage bin (110), a support plate (130), and a support rod (140). The storage bin (110) has two flow chambers inside. The bottom of the flow chambers is connected to and fixed with a discharge pipe (120). A pneumatic gate valve (121) is installed on the discharge pipe (120). The support plate (130) is connected to the storage bin (110) through a fixing plate (150). A limiting groove (131) is opened on the surface of the support plate (130). An electronic scale (132) is embedded in the limiting groove (131). A flow pipe (133) is fixed through the bottom of the limiting groove (131). The support rod (140) is fixed to the bottom of the support plate (130). The quantitative structure (200) includes a rotating block (210) and a stepper motor (220). The rotating block (210) has a circumferentially formed quantitative hole (211) inside. The stepper motor (220) is installed at the bottom of the support plate (130) and is connected to the rotating block (210) through a transmission component (230). The conveying structure (300) includes a belt conveyor (310) and a positioning element (330). A bracket (320) is fixed to the bottom of the belt conveyor (310). The positioning element (330) is installed at one end of the belt conveyor (310). The belt conveyor (310) is located below the guide pipe (133).

2. The quantitative filling machine for rice processing according to claim 1, characterized in that, Four support rods (140) are symmetrically arranged. A pad is fixed to the bottom of each support rod (140). A reinforcing rod (141) is fixed between the four support rods (140). One end of the belt conveyor (310) is installed on the reinforcing rod (141).

3. The quantitative filling machine for rice processing according to claim 1, characterized in that, The upper end of the guide tube (133) is truncated cone-shaped, and the upper end of the guide tube (133) is matched with the metering orifice (211).

4. A quantitative filling machine for rice processing according to claim 1, characterized in that, Protective components (160) are installed on both sides of the fixed plate (150). The protective components (160) include a protective plate (161) and a connecting plate (162). The connecting plate (162) is fixed to both sides of the storage bin (110). A bolt (163) passes through between the protective plate (161) and the connecting plate (162). The end of the bolt (163) is threaded with a nut (164). The bottom of the protective plate (161) is in contact with the surface of the support plate (130).

5. A quantitative filling machine for rice processing according to claim 4, characterized in that, The bottom of the rotating block (210) is fixed with a rotating column, which is rotatably connected inside the limiting groove (131). The rotating block (210) is slidably connected to the inner surface of the limiting groove (131).

6. A quantitative filling machine for rice processing according to claim 1, characterized in that, The transmission component (230) includes a gear ring (231) and a transmission gear (232). The gear ring (231) is fixed on the rotating block (210), and the transmission gear (232) is keyed to the end of the output shaft of the stepper motor (220). The transmission gear (232) meshes with the gear ring (231).

7. A quantitative filling machine for rice processing according to claim 1, characterized in that, The belt conveyor (310) has a placement area (311) formed on its conveyor belt, and the placement area (311) is distributed at equal intervals.

8. A quantitative filling machine for rice processing according to claim 1, characterized in that, The positioning component (330) includes two threaded posts (331) and a locking knob (333). The two threaded posts (331) are fixed on both sides of one end of the belt conveyor (310). A limit plate (332) is rotatably connected to the two threaded posts (331). The locking knob (333) is threaded to the end of the threaded posts (331).

9. A quantitative filling machine for rice processing according to claim 7, characterized in that, It also includes an automation control component, which includes a PLC controller, a touch screen, an electromagnetic reversing valve, a stepper driver, a contactor, and several detection sensors; the pneumatic gate valve (121) is electrically connected to the PLC controller via the electromagnetic reversing valve, the stepper motor (220) is electrically connected to the PLC controller via the stepper driver, the belt conveyor (310) is electrically connected to the PLC controller via the contactor, and the electronic scale (132) is connected to the PLC controller via the PLC's signal acquisition module; The detection sensors include a material level sensor and a container photoelectric sensor; the material level sensor is fixedly installed inside the flow chamber of the storage silo (110) to monitor the amount of rice stored in the silo; the container photoelectric sensor is fixed on the side of the flow pipe (133) and above the filling station of the belt conveyor (310) to detect the position signal of the packaging container in the placement area (311) and feed it back to the PLC. The stepper driver has a built-in encoder acquisition module. The encoder is installed on the stepper motor (220). The encoder signal is fed back to the PLC controller via the stepper driver. The PLC accurately controls the rotation position of the rotating block (210) based on the feedback signal.

10. A filling method for a quantitative filling machine for rice processing according to claim 1, wherein the filling is performed using a quantitative filling machine for rice processing according to any one of claims 1-9, characterized in that, The steps include the following: Step S1: Power-on self-test and process parameter preset: The equipment is powered on and started. The PLC controller automatically completes the whole machine self-test, sequentially checking the communication and working status of the electromagnetic reversing valve, stepper driver, contactor, electronic scale (132), material level sensor, and photoelectric sensor. After confirming that there are no faults, it enters the standby state. The operator inputs the standard weight parameters and running cycle parameters for this filling through the touch screen. The PLC automatically stores the corresponding production process formula and completes the parameter setting before filling. At the same time, according to the specifications of the packaging container, the positioning component (330) at one end of the belt conveyor (310) is finely adjusted, and the container is positioned by using the limiting plate (332) to ensure the filling alignment accuracy. Step S2, Material Storage and Intelligent Monitoring of Material Level: The rice to be filled is put into the two guide chambers inside the storage silo (110). The material level sensor built into the storage silo (110) collects the material storage signal in the silo in real time and transmits it to the PLC controller. When the material level is lower than the set low level, the system triggers a replenishment reminder to realize automatic replenishment. When the material level reaches the high level threshold, the feeding stops to ensure the material storage in the storage silo (110) is stable and avoids material shortage shutdown or material overflow. Step S3, Automatic Container Conveying and Arrival Detection: The PLC controller controls the belt conveyor (310) to start running via a contactor. Empty packaging containers are sequentially carried forward by the placement areas (311) evenly distributed on the belt of the belt conveyor (310). When the container is conveyed to the filling station directly below the guide pipe (133), the photoelectric sensor at the station detects the container arrival signal and feeds it back to the PLC. The PLC immediately controls the contactor to disconnect, and the belt conveyor (310) stops instantly, waiting for the filling operation. At the same time, the system locks the filling process to prevent empty container feeding and material spillage. Step S4: Automatic valve opening and feeding, precise filling of the metering hole (211): After the container is positioned, the PLC controller outputs a control signal to connect the solenoid valve, the solenoid valve switches the air path to open, and drives the pneumatic gate valve (121) on the discharge pipe (120) to open automatically; the rice in the guide chamber of the storage bin (110) falls along the discharge pipe (120) and falls precisely into the metering hole (211) directly below, and the electronic scale (132) at the bottom of the metering hole (211) is used to fix the volume to complete the predetermined amount of rice filling; after the preset filling time, the PLC controls the solenoid valve to cut off the air and reset, the pneumatic gate valve (121) closes, stops feeding, and completes the single volume quantitative storage. Step S5, precise indexing and automatic alignment and feeding: After feeding is completed, the PLC controller sends pulse and direction signals to the stepper driver, and the stepper driver drives the stepper motor (220) to operate precisely; the stepper motor (220) is driven by the meshing of the transmission gear (232) and the gear ring (231), which drives the rotating block (210) to rotate smoothly inside the limiting groove (131). With the position feedback of the motor encoder, the rotation angle is precisely controlled so that the metering hole (211) filled with rice is precisely aligned with the upper frustum interface of the guide tube (133); after alignment, the rice inside the metering hole (211) falls vertically along the guide tube (133) by its own weight and is automatically poured into the packaging container at the lower station. Step S6, Real-time Weighing Closed-Loop Intelligent Correction: Throughout the filling process, the electronic scale (132) embedded in the limiting groove (131) transmits filling weight data to the PLC in real time through the signal module. The PLC compares the preset standard weight parameters in real time to form intelligent closed-loop compensation: When the filling weight is close to the set threshold, the system adaptively fine-tunes the opening time of the pneumatic gate valve (121), fine-tunes the single feeding amount, and corrects the quantitative error; if there are deviations in multiple sets of filling data, the system automatically memorizes and updates the process parameters to achieve self-tuning correction, ensuring that the filling weight of each can of rice is uniform and accurate. Step S7, Continuous Cyclic Filling Operation: After a single filling is completed, the PLC releases the conveyor lock and restarts the belt conveyor (310) via the contactor to convey the filled finished container out, while simultaneously moving the next empty container to the filling station. At the same time, the rotating block (210) continues to rotate in increments, and the empty metering orifice (211) rotates back to below the discharge pipe (120), repeating the feeding, metering, unloading, and weighing calibration process to achieve uninterrupted automated cyclic filling. Step S8, Fault Warning and Shutdown Protection: During the operation of the whole machine, the PLC monitors the operating status of each component in real time. If the storage bin (110) is short of material, there is no container at the work station, the motor is overloaded, or the weighing is abnormal, the system will immediately trigger an audible and visual alarm, simultaneously suspend the filling process, lock the equipment operation, and production can only continue after the fault is cleared. After the production operation is completed, the machine can be stopped with one click, and the system will automatically record the production data for easy data traceability and equipment cleaning and maintenance.

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