Intelligent weighing spiral filling control system and control method thereof

Abstract

The invention relates to an intelligent weighing spiral filling control system and a control method thereof. The device comprises a material supply assembly, a spiral feeding assembly, a weighing assembly, a gas regulation and control assembly, a discharging assembly, a detection assembly and a dynamic following type dust removal assembly. The influence of uncertainty of material attributes (such as gas content, viscosity and fluidity) on the filling precision is effectively solved, the system adopts a self-adaptive control mechanism, material characteristic changes are monitored in real time, the spiral feeding speed, the negative pressure strength and the dust removal strategy are dynamically adjusted, and it is ensured that when the gas content of materials fluctuates, the viscosity changes or the fluidity is different, the filling precision is improved. And high-precision filling can still be kept. Through closed-loop feedback and parameter optimization, the system remarkably improves the filling qualification rate, meanwhile, the energy consumption and the maintenance cost are reduced, and efficient self-adaptive processing of complex material attributes is achieved.

Description

Technical Field

[0001] This invention relates to the field of powder material metering and filling equipment technology, and in particular to an intelligent weighing screw filling control system and its control method. Background Technology

[0002] Existing filling technologies exhibit systemic flaws when handling complex materials of various types: their static control mechanisms cannot detect changes in material properties in real time, leading to persistent issues of inconsistent filling accuracy caused by fluctuations in gas content and differences in flowability, specifically manifesting as a filling volume deviation rate as high as 15%-20%; traditional equipment, lacking adaptive adjustment capabilities, is prone to material blockage or leakage when dealing with powders and granules, resulting in an average of over 30% in wasted energy consumption; furthermore, switching between multiple specifications requires manual intervention, with each changeover taking over 2 hours, significantly hindering production efficiency. These technological shortcomings not only increase annual maintenance costs by 25%-30% but also pose quality consistency risks in high-end fields such as pharmaceuticals and food. Summary of the Invention

[0003] To address this issue, the present invention provides an intelligent weighing screw filling control system and its control method. By monitoring the speed and torque parameters of the screw feeder motor in real time, the material inventory is dynamically adjusted to balance the filling process. This solves the problem of precision loss caused by fluctuations in the gas content and flowability of materials in traditional equipment, improves the filling qualification rate and production efficiency, and reduces energy consumption and maintenance costs.

[0004] To solve the above-mentioned technical problems, the present invention provides an intelligent weighing screw filling control system, comprising: The material supply assembly includes a hopper, a discharge pipe disposed above the hopper, a planetary feeder disposed on the discharge pipe, and a level gauge for detecting the material level in the hopper. A vent, a check valve, and a filter plate are sequentially disposed on the hopper. The screw feeding assembly includes a screw motor disposed above the hopper, a screw rod passing through the inside of the hopper and connected to the drive end of the screw motor, and a central sleeve connected to the lower end of the screw rod; The weighing assembly includes a lifting mechanism, a weighing sensor that is lifted and lowered by the lifting mechanism, and a bag clamp connected to the weighing sensor. The gas control component includes a negative pressure pipe disposed below the hopper and a nano vacuum rod disposed on the side wall of the hopper. The central sleeve is disposed inside the negative pressure pipe, and a nano tube is supported inside the negative pressure pipe by the central sleeve. The nano vacuum rod is used to degas the material in the hopper to reduce the gas content of the material before it enters the screw feeder component. The discharge assembly includes a material gate respectively disposed on the negative pressure pipe and a material gate cylinder for driving the opening adjustment of the material gate; The detection component includes an upper photoelectric detector and a lower photoelectric detector for detecting when the lifting stroke of the lifting mechanism has reached the desired position; A dynamic following dust removal component is installed on the lifting mechanism and connected to the negative pressure pipe for dust removal during filling.

[0005] In one embodiment of the present invention, it further includes an installation platform mounted on a fully automatic packaging machine, the installation platform being connected to a support frame, and the hopper being disposed on the support frame; The dynamic following dust removal assembly includes a support frame connected to the lifting mechanism, a dust extraction frame connected to the support frame and the negative pressure pipe respectively, and a dust cover that cooperates with the bag clamp. The dust extraction frame is equipped with a dust extraction control cylinder for controlling the opening and closing of the dust extraction passage inside the dust extraction frame. The dust extraction frame is connected to a dust removal pipe, the dust removal pipe is connected to a T-shaped pipe, and the T-shaped pipe is installed on the dust extraction frame through a support pipe. The dust cover is connected to a vacuum hose and is connected to a T-joint pipe through the vacuum hose; The dust removal pipe is equipped with a dust cover control cylinder for controlling the opening and closing of the dust extraction passage inside the dust cover.

[0006] In one embodiment of the present invention, the lifting mechanism includes a lifting bracket, a lifting mechanism motor, a guide rail, a slider, a mounting base, a lifting shaft, and a chain; The slider slides in conjunction with the guide rail, the mounting base is connected to both the slider and the lifting bracket, the lifting shaft is connected to the mounting base and to the chain, and the lifting mechanism motor can control the movement of the lifting bracket by driving the chain.

[0007] In one embodiment of the present invention, a grid-shaped gasket is provided inside the negative pressure tube. The grid-shaped gasket is inserted into the nanotube by utilizing its concave-convex structure. A silicone gasket is provided between the central sleeve and the nanotube. The central sleeve engages with the negative pressure tube threadedly through its end face nut to compress the nanotube.

[0008] In one embodiment of the present invention, a flexible connection mechanism is provided between the dust extraction frame and the bag clamp to isolate the transmission of vibration and friction generated by the dynamic following dust removal component to the weighing sensor; the flexible connection mechanism includes a soft connection structure, a soft connection pressure plate and a sealing gasket, and the two ends of the soft connection structure are respectively connected to the dust extraction frame and the bag clamp and are fixed by the soft connection pressure plate.

[0009] In one embodiment of the present invention, a sealing gasket is provided between the lower end of the negative pressure pipe and the dust extraction frame and is pressed by a pressure plate.

[0010] In one embodiment of the present invention, the dynamic following dust removal assembly further includes a dust removal fixing pipe, a fixing block, and an adjusting plate. The dust removal fixing pipe is installed on the support frame, and the dust removal pipe is arranged parallel to the dust removal fixing pipe along the lifting direction. The fixing block is connected between the side wall of the dust removal fixing pipe and the mounting platform. The adjusting plate is connected to the mounting platform and is connected to a dust removal pipe friction block that cooperates with the dust removal pipe, so as to support and guide the dust removal pipe and keep the dust removal fixing pipe and the dust removal pipe parallel and frictionless.

[0011] In one embodiment of the present invention, a negative pressure pipe friction block is provided on the dust extraction frame, the negative pressure pipe friction block is used to limit the gap between the negative pressure pipe and the dust extraction frame to avoid contact friction.

[0012] In one embodiment of the present invention, the dust extraction frame is provided with a manual adjustment port, which is used to adjust the dust extraction cross-sectional area.

[0013] This invention provides an intelligent weighing screw filling control method, utilizing the aforementioned intelligent weighing screw filling control system, comprising: S1. After the bag feeding machine completes the bag feeding, the robotic arm mechanism performs the bag loading operation, drives the bag clamp to unfold and performs clamping standard judgment; when the judgment does not meet the standard, the air nozzle blowing mechanism is triggered to discard the bag, and the number of discarded bags is counted and recorded, and the discarded bag data is fed back to the control system in real time. When the cumulative number of discarded bags exceeds the preset threshold, a manual intervention prompt is output; when the judgment meets the standard, proceed to step S2. S2. The lifting mechanism motor drives the weighing sensor and bag clamp to move vertically, and the upper photoelectric detector detects the lifting stroke to the position. If no position signal is detected within the set time window, the lifting mechanism motor is stopped and an alarm is triggered. When a position signal is detected, the lifting mechanism motor is stopped and the process proceeds to step S3. S3. Control the material gate cylinder to drive the material gate to open to the coarse material opening degree, calculate the coarse material speed or target number of revolutions of the screw motor based on the target weight and coarse material feeding time, and drive the screw motor to drive the screw rod to feed material, while starting dynamic weighing. S4. During the dynamic weighing process, the mass data of the weighing sensor is acquired in real time and compared with the reference value. When the mass data is lower than the reference value, it is determined that the gas content of the material is too high, and the nanotube in the negative pressure tube is controlled to adsorb the gas. When the mass data fluctuates abnormally, the nanovacuum rod is controlled to degas the material in the hopper to reduce the gas content of the material before entering the screw feeder and achieve gas balance. S5. Real-time acquisition of the torque parameters of the screw motor to characterize the material flowability; when the torque parameters exceed the preset threshold, control the planetary feeder to stop feeding and reset the detection range of the level gauge; when the level gauge is detected to be faulty, control the planetary feeder to perform material replenishment. S6. If the preset time is not reached within the coarse material feeding time, the speed of the screw motor is increased to compensate for insufficient material feeding; when the speed exceeds the rated speed threshold, a manual adjustment parameter prompt is output. S7. After the coarse feeding is completed, control the material gate cylinder to close the material gate to the fine feeding opening, control the planetary feeder to stop feeding, control the lifting mechanism motor to pause its descent to improve weighing accuracy, and control the screw motor to reduce speed to achieve slow and accurate feeding until the quality data reaches the target weight and meets the accuracy requirements. S8. After reaching the target weight, control the material gate to close, control the lifting mechanism motor to drive the weighing sensor and bag clamp to continue descending to the detection position of the lower photoelectric detector; if the lower position signal is not detected within the set time window, control the lifting mechanism motor to stop and trigger an alarm; when the position signal is detected, control the dynamic following dust removal component to start dust extraction, so that the dust cover can remove dust and residual air in the bag, and turn off the dust extraction after completion; S9. After the bag clamp closes the bag opening, the trolley mechanism moves the packaging bag to the heat sealing position to complete the sealing and reset.

[0014] The technical solution of the present invention has the following advantages compared with the prior art: This invention discloses an intelligent weighing screw filling control system and its control method, which effectively solves the impact of uncertainties in material properties (such as gas content, viscosity, and flowability) on filling accuracy. The system employs an adaptive control mechanism to monitor changes in material characteristics in real time and dynamically adjust the screw feeding speed, negative pressure intensity, and dust removal strategy to ensure high-precision filling even when material gas content fluctuates, viscosity changes, or flowability varies. Through closed-loop feedback and parameter optimization, the system significantly improves the filling qualification rate while reducing energy consumption and maintenance costs, achieving efficient adaptive processing of complex material properties.

[0015] This invention addresses the shortcomings of traditional spiral filling equipment, which typically employs static parameter control such as fixed rotation speed, fixed opening degree, and fixed time, lacking the ability to online sense and discern changes in the gas content and flowability of materials. When the gas content of powders, granules, or other materials fluctuates, agglomerates, or their flowability decreases, the dynamic weighing signal is prone to falsely high values, lags, or abnormal fluctuations. This leads to inaccurate switching points between coarse and fine material feeding, increased dispersion in filling accuracy, and higher rates of bag discarding and rework. This invention utilizes the coupled analysis of the rotational speed and torque parameters of a spiral motor to characterize the material's flowability through the dynamic response of rotational speed and torque. It also combines the mass data from a weighing sensor with reference values ​​and fluctuation thresholds to determine the gas content. When the gas content is determined to be too high or fluctuates abnormally, the invention activates the nanotubes within the negative pressure pipe to adsorb gas and the nanovacuum rods on the sidewall of the hopper to degas the material. When abnormal flowability is detected, the invention activates the planetary feeder to pause feeding and intelligently reset or replenish the level gauge's detection range. This forms a closed-loop adaptive control system of "sensing, determining, and regulating," significantly improving the response to material property fluctuations and ensuring a stable and controllable filling process.

[0016] This invention addresses the challenge of existing static control methods in balancing filling accuracy and continuous production capacity. Poor flowability can easily lead to blockages or unstable feeding, causing the coarse feeding stage to fail to reach the preset quality threshold, forcing a speed increase, or requiring shutdowns for cleaning and resetting due to dust escape and weighing fluctuations, resulting in reduced effective operating time and increased energy consumption and maintenance costs. This invention employs a two-stage control system for coarse and fine feeding stages. A cylinder drives the material gate to switch between coarse and fine feeding openings. During the fine feeding stage, the lifting mechanism motor pauses its descent to improve weighing stability, while the screw motor is slowed down for slow and precise feeding. During the coarse feeding stage, if the preset quality threshold is not reached within a set time, the screw motor speed is automatically increased for correction, and a manual adjustment prompt is output when the rated speed threshold is exceeded to prevent prolonged over-limit operation. This strategy maintains accuracy while reducing unnecessary downtime and refilling, improving continuous operation capability and overall production capacity.

[0017] This invention addresses the problems of dust escape, bag-mouth dust, and residual gas that easily pollute the working environment during existing powder filling processes. These gases can adhere to the weighing components or sensor, introducing additional friction and disturbance, further amplifying dynamic weighing errors. Conventional dust removal devices have high coupling with the weighing mechanism, and vibrations and friction generated during homing are easily transmitted to the weighing sensor, causing measurement drift. This invention features a dynamic following dust removal component connected to a negative pressure pipe. During the phased dust removal process after filling and lowering, the dust extraction control cylinder and dust cover control cylinder selectively open and close the dust extraction path to achieve directional removal of dust and residual gas inside the bag. Simultaneously, a flexible connection mechanism between the dust extraction frame and the bag clamp isolates the transmission of vibrations and friction generated during homing to the weighing sensor. A friction block on the negative pressure pipe limits the gap between the negative pressure pipe and the dust extraction frame to avoid contact friction, reducing weighing interference at the source and improving measurement reliability and cleanliness adaptability. This is particularly suitable for applications with high dust control requirements.

[0018] This invention addresses the significant differences in gas content, particle size distribution, frictional characteristics, and bulk density among various materials. Traditional equipment changeovers typically rely on repeated manual parameter adjustments based on experience, resulting in lengthy debugging cycles. Furthermore, it lacks effective fallback strategies when level gauges fail or material conditions change abruptly, easily leading to supply interruptions, out-of-tolerance filling, or cascading shutdowns. This invention introduces flowability determination based on torque parameters and gas content determination based on mass data into the control logic. This enables timely triggering of planetary feeder pauses, intelligent resetting of level gauge detection ranges, or automatic replenishment when level gauges fail, in the event of sudden changes in operating conditions. Combined with upper and lower photoelectric detectors to monitor the lifting stroke, it reduces the risk of loss of control under abnormal conditions. Therefore, the system possesses stronger adaptability and fault tolerance for different materials such as powders and granules, improving the reliability of continuous production.

[0019] This invention addresses the high overall cost of traditional equipment in the long run due to bag discarding, rework, and raw material waste caused by fluctuations in filling accuracy, as well as the hidden costs of dust control and downtime maintenance. Furthermore, frequent speed increases and repeated start-stop cycles during the initial coarse material feeding stage to meet standards also result in additional energy consumption and component wear. This invention reduces weighing fluctuations and the probability of exceeding tolerances by controlling air content and flowability, thus minimizing bag discarding and raw material waste. A two-stage feeding and interlocking mechanism reduces ineffective start-stops and abnormal shutdowns, and prompts manual adjustments when the speed exceeds the rated threshold, preventing lifespan reduction caused by prolonged operation beyond limits. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1This is a front view of the air-dust balanced spiral filling machine of the present invention.

[0022] Figure 2 This is the main view of the dynamic following dust removal component of the present invention.

[0023] Figure 3 This is a partial view of the bottom of the screw rod of the present invention.

[0024] Figure 4 This is the flow chart of the intelligent weighing screw filling control method of the present invention. Figure 1 .

[0025] Figure 5 This is the flow chart of the intelligent weighing screw filling control method of the present invention. Figure 2 .

[0026] Explanation of reference numerals in the instruction manual: 1. Installation platform; 2. Lifting mechanism; 3. Lifting mechanism motor; 4. Nano vacuum rod; 5. Support frame; 6. Feed hopper; 7. Planetary feeder; 8. Feed pipe; 9. Screw motor; 10. Level gauge; 11. Breathing port; 12. Check valve; 13. Filter plate; 14. Screw rod; 15. Material gate cylinder; 16. Negative pressure pipe; 17. Gas control mechanism; 18. Weighing sensor; 19. Bag clamp; 20. Nano sleeve; 21. Central frame; 22. Material gate; 23. Robotic arm mechanism; 24. Cart mechanism; 25. Fully automatic packaging machine; 2.1 Slider; 2.2 Mounting base; 2.3 Lifting bracket; 2.4 Lifting shaft; 2.5 Bearing frame; 17.1 Dust extraction frame; 17.2 Flexible connection structure; 17.3 Flexible connection pressure plate; 17.4 Sealing gasket; 17.5 Pressure plate; 17.6 Negative pressure pipe friction block; 17.7 Manual adjustment port; 17.8 Dust extraction control cylinder; 17.9 Dust removal fixing pipe; 17.10 Fixing block; 17.11 Adjusting plate; 17.12 Dust removal pipe friction block; 17.13 Dust removal pipe; 17.14 Dust cover control cylinder; 17.15 T-connector; 17.16 Support pipe; 16.1 Grid gasket; 16.2 Silicone gasket; 16.3 End nut; 19.1 Dust cover; 19.2 Vacuum suction hose; 21.1, Central Set. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0028] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0029] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 3 As shown, the present invention provides an intelligent weighing screw filling control system, comprising: The material supply assembly includes a hopper 6, a discharge pipe 8 disposed above the hopper 6, a planetary feeder 7 disposed on the discharge pipe 8, and a level gauge 10 for detecting the material level in the hopper 6. A vent 11, a check valve 12, and a filter plate 13 are sequentially disposed on the hopper 6. The screw feeding assembly includes a screw motor 9 disposed above the hopper 6, a screw rod 14 passing through the inside of the hopper 6 and connected to the drive end of the screw motor 9, and a center sleeve 21.1 connected to the lower end of the screw rod 14; The weighing assembly includes a lifting mechanism 2, a weighing sensor 18 that is lifted and lowered by the lifting mechanism 2, and a bag clamp 19 connected to the weighing sensor 18. The gas control component includes a negative pressure pipe 16 disposed below the hopper 6 and a nano vacuum rod 4 disposed on the side wall of the hopper 6. The central sleeve 21.1 is disposed inside the negative pressure pipe 16, and a nano sleeve 20 is supported inside the negative pressure pipe 16 by the central sleeve 21.1. The nano vacuum rod 4 is used to degas the material in the hopper 6 to reduce the gas content of the material before it enters the screw feeder component. The discharge assembly includes a material gate 22 respectively disposed on the negative pressure pipe 16 and a material gate cylinder 15 for driving the opening adjustment of the material gate 22; The detection component includes an upper photoelectric detector and a lower photoelectric detector for detecting when the lifting mechanism 2 has reached the lifting stroke position; A dynamic following dust removal component is installed on the lifting mechanism 2 and connected to the negative pressure pipe 16, and is used for dust removal during filling.

[0032] In one embodiment, the dynamic following dust removal assembly includes a support frame 2.5 connected to the lifting mechanism 2, a dust extraction frame 17.1 connected to the support frame 2.5 and the negative pressure pipe 16 respectively, and a dust cover 19.1 that cooperates with the bag clamp 19. The dust extraction frame 17.1 is equipped with a dust extraction control cylinder 17.8 for controlling the opening and closing of the dust extraction passage inside the dust extraction frame 17.1. The dust extraction frame 17.1 is connected to a dust extraction pipe 17.13, the dust extraction pipe 17.13 is connected to a tee pipe 17.15, and the tee pipe 17.15 is installed on the dust extraction frame 17.1 through a support pipe 17.16; The dust cover 19.1 is connected to a vacuum hose 19.2 and is connected to a three-way pipe 17.15 through the vacuum hose 19.2; The dust removal pipe 17.13 is equipped with a dust cover control cylinder 17.14 for controlling the opening and closing of the dust extraction passage inside the dust cover 19.1.

[0033] It should be noted that the nanotube 20 selectively adsorbs free gas in the material with its microporous structure, eliminating the interference of gas content on the weighing signal; the dynamic following dust removal component achieves real-time dust collection and directional emission through the synergistic effect of negative pressure suction and bag mouth dust cover 19.1, avoiding the impact of dust adhesion on filling accuracy; the specially designed soft connection structure 17.2 uses elastic buffer material to effectively isolate mechanical vibration when the dust removal equipment moves up and down with the bag clamp 19, preventing additional friction force from being transmitted to the weighing sensor 18.

[0034] By setting a nano-level adsorption sleeve near the material inlet, the free gas in the material is selectively adsorbed through the microporous structure, blocking the dynamic influence of gas escape on the weighing sensor 18. The gas is adsorbed through the nano-sleeve 20, with an error within ±.%, ensuring that the weighing data truly reflects the material quality and avoiding falsely high or low filling volume due to fluctuations in gas content.

[0035] In one embodiment, the lifting mechanism 2 includes a lifting bracket 2.3, a lifting mechanism motor 3, a guide rail, a slider 2.1, a mounting base 2.2, a lifting shaft 2.4, and a chain; The slider 2.1 is slidably engaged with the guide rail. The mounting base 2.2 is connected to the slider 2.1 and the lifting bracket 2.3 respectively. The lifting shaft 2.4 is connected to the mounting base 2.2 and to the chain. The lifting mechanism motor 3 can control the movement of the lifting bracket 2.3 by driving the chain.

[0036] Specifically, a load cell 18 is bolted to the lifting bracket 2.3, and a bag clamp 19 is bolted to the other end of the load cell 18, so that the bag clamp 19 can move synchronously when the lifting bracket 2.3 moves. The dust cover 19.1 is bolted to the bag clamp 19 and connected to the three-way pipe 17.15 through the suction hose 19.2, effectively sucking up the dust that is released from the bag clamp 19 during the filling process and keeping the working environment clean.

[0037] In one embodiment, a grid-shaped gasket 16.1 is provided inside the negative pressure tube 16. The grid-shaped gasket 16.1 is inserted into the nanotube 20 by utilizing its concave-convex structure. A silicone gasket 16.2 is provided between the central sleeve 21.1 and the nanotube 20. The central sleeve 21.1 is threadedly engaged with the negative pressure tube 16 by its end face nut 16.3 to press the nanotube 20 tightly.

[0038] It should be noted that the screw rod 14 is connected to the screw motor 9 via threaded engagement, and the screw motor 9 drives its rotation to achieve continuous material feeding. The negative pressure pipe 16 is fixed below the discharge hopper 6 with bolts to ensure that it does not interfere with the internal screw rod 14. To address the potential jumping problem of the screw rod 14 during high-speed rotation, a central sleeve 21.1 is installed below the screw rod 14, providing stable support. The central sleeve 21.1 is installed inside the negative pressure pipe 16, further enhancing the stability of the structure. A grid-shaped gasket 16.1 is inserted below the negative pressure pipe 16, and its concave-convex structure is used to insert the nano-sleeve 20. Then, a silicone gasket 16.2 is inserted. With the support of the central sleeve 21.1 and the end nut 16.3 threadedly engages with the negative pressure pipe 16, the nano-sleeve 20 is pressed tightly, effectively preventing material leakage. The material gate cylinder 15 is fixed to the negative pressure pipe 16 by bolts, while the material gate 22 is installed on the negative pressure pipe 16. The material gate cylinder 15 achieves precise control over the opening and closing of the material gate 22 and the size of the opening through the linkage mechanism.

[0039] In one embodiment, a flexible connection mechanism is provided between the dust extraction frame 17.1 and the bag clamp 19 to isolate the transmission of vibration and friction generated by the dynamic following dust removal component to the weighing sensor 18. The flexible connection mechanism includes a flexible connection structure 17.2, a flexible connection pressure plate 17.3, and a sealing gasket 17.4. The two ends of the flexible connection structure 17.2 are respectively connected to the dust extraction frame 17.1 and the bag clamp 19 and are fixed by the flexible connection pressure plate 17.3 to ensure the flexibility and sealing of the connection.

[0040] Specifically, the support frame 2.5 is bolted to the lifting bracket 2.3, and the other end of the support frame 2.5 is bolted to the dust extraction frame 17.1. The dust extraction frame 17.1 is suspended by the support frame 2.5 to ensure that it does not come into contact with the load cell 18, thus avoiding any impact on the weighing effect. To facilitate transportation and prevent damage to the load cell 18 from impacts, the connection between the load cell 18 and the bag clamp 19 can be loosened, and the distance between the dust extraction frame 17.1 and the bag clamp 19 can be tightened.

[0041] In one embodiment, a sealing gasket 17.4 is provided between the lower end of the negative pressure pipe 16 and the dust extraction frame 17.1 and is pressed by a pressure plate 17.5 to form a sealed state, thereby ensuring the dust removal effect.

[0042] In one embodiment, the system further includes an installation platform 1 mounted on a fully automatic packaging machine 25, the installation platform 1 being connected to a support frame 5, and the hopper 6 being disposed on the support frame 5.

[0043] It should be noted that the mounting platform 1 and the fully automatic packaging machine 25 are securely fixed to the ground via a stable connection, and their relative position is strictly guaranteed by the installation precision of the lifting mechanism 2. The lifting mechanism 2, as a transmission component, is firmly fixed at a key position between the steel platform and the fully automatic packaging machine 25, and its lifting mechanism motor 3 is tightly secured with bolts to ensure stable power output. The support frame 5 is rigidly fixed to the steel platform with bolts, providing a solid support foundation for subsequent components.

[0044] The dynamic following dust removal assembly also includes a dust removal fixing pipe 17.9, a fixing block 17.10, and an adjusting plate 17.11. The dust removal fixing pipe 17.9 is installed on the support frame 5. The dust removal pipe 17.13 is arranged parallel to the dust removal fixing pipe 17.9 along the lifting direction. The fixing block 17.10 is connected between the side wall of the dust removal fixing pipe 17.9 and the mounting platform 1. The adjusting plate 17.11 is connected to the mounting platform 1 and is connected to a dust removal pipe friction block 17.12 that cooperates with the dust removal pipe 17.13 to support and guide the dust removal pipe 17.13, keeping the dust removal fixing pipe 17.9 and the dust removal pipe 17.13 parallel and frictionless.

[0045] In one embodiment, a negative pressure pipe friction block 17.6 is provided on the dust extraction frame 17.1. The negative pressure pipe friction block 17.6 is used to limit the gap between the negative pressure pipe 16 and the dust extraction frame 17.1 to avoid contact friction.

[0046] The dust collection pipe 17.9 is bolted to the support frame 5, and the fixing block 17.10, which is fixed to the mounting platform 1, is adjusted to ensure that it remains parallel to the dust collection pipe 17.13 and has no frictional contact, thus ensuring the smooth operation of the dust collection system. The negative pressure pipe friction block 17.6 is bolted to the dust extraction frame 17.1, and its position is adjusted to ensure that the negative pressure pipe 16 does not rub against the dust extraction frame 17.1, thereby avoiding any indirect impact on the balancing effect.

[0047] Reference Figure 4 , Figure 5 As shown, this embodiment also provides an intelligent weighing screw filling control method, which utilizes the aforementioned intelligent weighing screw filling control system, including: S1. After the bag feeding machine completes the bag feeding, the robotic arm mechanism 23 performs the bag loading operation. The control system (such as PLC) drives the bag clamp 19 to unfold and performs clamping standard judgment. When the judgment does not meet the standard, the air nozzle blowing mechanism is triggered to discard the bag, and the number of discarded bags is counted and recorded. The discarded bag data is fed back to the control system in real time. When the cumulative number of discarded bags exceeds the preset threshold, a manual intervention prompt is output. When the judgment meets the standard, step S2 is entered.

[0048] It should be noted that an opening / closing detection element is provided on the opening / closing mechanism of the bag clamp 19. The opening detection element and the clamping detection element are used to detect whether the bag clamp 19 has reached the unfolded opening position and the clamping position, respectively. The positioning detection element can be a magnetic switch, a proximity switch, a photoelectric switch or a Hall sensor.

[0049] The air nozzle is a compressed air nozzle or jet nozzle, located near the bag clamp 19, beside the bag loading station, or to the side of the bag opening area, with the jet direction pointing towards the bag disposal channel or away from the bag clamp 19. The blow-off control components include solenoid valves, throttle valves, and pressure reducing valves, used to control the on / off state, flow rate, or pressure of the compressed air. During bag disposal, the blown-off packaging bags are received by means such as a bag disposal chute, waste bag bin, or recycling conveyor belt.

[0050] S2, the lifting mechanism motor 3 drives the weighing sensor 18 and bag clamp 19 to move vertically, and the upper photoelectric detector detects the lifting stroke to the position; if no position signal is detected within the set time window, the lifting mechanism motor 3 is controlled to stop and an alarm is triggered; when the position signal is detected, the lifting mechanism motor 3 is controlled to stop and the process proceeds to step S3. S3. Control the material gate cylinder 15 to drive the material gate 22 to open to the coarse material opening degree. Calculate the coarse material speed or target number of revolutions of the screw motor 9 (0.25 kg per revolution, 96 revolutions required) based on the target weight (e.g., 25 kg) and the coarse material feeding time (e.g., 10 seconds). Drive the screw motor 9 to drive the screw rod 14 to feed material, and start dynamic weighing at the same time. S4. During the dynamic weighing process, the mass data of the weighing sensor 18 is acquired in real time and compared with the reference value. When the mass data is lower than the reference value, it is determined that the gas content of the material is too high, and the nano-sleeve 20 in the negative pressure tube 16 is controlled to adsorb the gas. When the mass data fluctuates abnormally, the nano-vacuum rod 4 is controlled to degas the material in the feed hopper 6 to reduce the gas content of the material before entering the screw feeder assembly and achieve gas balance. S5. Real-time acquisition of torque parameters of screw motor 9 to characterize material flowability; when torque parameters exceed preset threshold, control planetary feeder 7 to stop feeding and reset the detection range of level gauge 10; when level gauge 10 is detected to be malfunctioning, control planetary feeder 7 to perform material replenishment. S6. If the preset time is not reached within the coarse material feeding time, the speed of the screw motor 9 is increased to compensate for insufficient material feeding; when the speed exceeds the rated speed threshold, a manual adjustment parameter prompt is output. S7. After the coarse feeding is completed, control the material gate cylinder 15 to close the material gate 22 to the fine feeding opening, control the planetary feeder 7 to stop feeding, control the lifting mechanism motor 3 to pause the downward movement to improve the weighing accuracy, and control the screw motor 9 to reduce the speed to achieve slow and accurate feeding until the quality data reaches the target weight and meets the accuracy requirements. S8. After reaching the target weight, control the material gate 22 to close, and control the lifting mechanism motor 3 to drive the weighing sensor 18 and bag clamp 19 to continue descending to the detection position of the lower photoelectric detector; if the lower position signal is not detected within the set time window, control the lifting mechanism motor 3 to stop and trigger an alarm; when the position signal is detected, control the dynamic following dust removal component to start dust extraction, so that the dust cover 19.1 can remove dust and residual air in the bag, and then turn off the dust extraction after completion; After S9 and bag clamp 19 close the bag opening, the trolley mechanism 24 moves the packaging bag to the heat sealing position to complete the sealing and reset.

[0051] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An intelligent weighing screw filling control system, characterized in that, include: The material supply assembly includes a hopper (6), a discharge pipe (8) disposed above the hopper (6), a planetary feeder (7) disposed on the discharge pipe (8), and a level gauge (10) for detecting the material level in the hopper (6). The hopper (6) is provided with a vent (11), a check valve (12), and a filter plate (13) in sequence. The screw feeding assembly includes a screw motor (9) disposed above the hopper (6), a screw rod (14) passing through the inside of the hopper (6) and connected to the drive end of the screw motor (9), and a center sleeve (21.1) connected to the lower end of the screw rod (14). The weighing assembly includes a lifting mechanism (2), a weighing sensor (18) that is lifted and lowered by the lifting mechanism (2), and a bag clamp (19) connected to the weighing sensor (18). The gas control component includes a negative pressure pipe (16) disposed below the hopper (6) and a nano vacuum rod (4) disposed on the side wall of the hopper (6). The central sleeve (21.1) is disposed inside the negative pressure pipe (16), and a nano sleeve (20) is supported inside the negative pressure pipe (16) by the central sleeve (21.1). The nano vacuum rod (4) is used to degas the material in the hopper (6) to reduce the gas content of the material before it enters the screw feeder component. The discharge assembly includes a material gate (22) respectively disposed on the negative pressure pipe (16) and a material gate cylinder (15) for driving the opening adjustment of the material gate (22). The detection assembly includes an upper photoelectric detector and a lower photoelectric detector for detecting when the lifting stroke of the lifting mechanism (2) is in place; A dynamic following dust removal component is installed on the lifting mechanism (2) and connected to the negative pressure pipe (16) for dust removal during filling.

2. The intelligent weighing screw filling control system according to claim 1, characterized in that, The dynamic following dust removal assembly includes a support frame (2.5) connected to the lifting mechanism (2), a dust extraction frame (17.1) connected to the support frame (2.5) and the negative pressure pipe (16) respectively, and a dust cover (19.1) cooperating with the bag clamp (19). The dust extraction frame (17.1) is equipped with a dust extraction control cylinder (17.8) for controlling the opening and closing of the dust extraction passage inside the dust extraction frame (17.1). The dust extraction frame (17.1) is connected to a dust extraction pipe (17.13), the dust extraction pipe (17.13) is connected to a tee pipe (17.15), and the tee pipe (17.15) is installed on the dust extraction frame (17.1) through a support pipe (17.16). The dust cover (19.1) is connected to a vacuum hose (19.2) and is connected to a three-way pipe (17.15) through the vacuum hose (19.2); The dust removal pipe (17.13) is equipped with a dust cover control cylinder (17.14) for controlling the opening and closing of the dust extraction passage inside the dust cover (19.1).

3. The intelligent weighing screw filling control system according to claim 1, characterized in that, The lifting mechanism (2) includes a lifting bracket (2.3), a lifting mechanism motor (3), a guide rail, a slider (2.1), a mounting base (2.2), a lifting shaft (2.4), and a chain; The slider (2.1) slides with the guide rail, the mounting base (2.2) is connected to the slider (2.1) and the lifting bracket (2.3) respectively, the lifting shaft (2.4) is connected to the mounting base (2.2) and connected to the chain, and the lifting mechanism motor (3) can control the movement of the lifting bracket (2.3) by driving the chain.

4. The intelligent weighing screw filling control system according to claim 1, characterized in that, A grid-shaped gasket (16.1) is provided inside the negative pressure tube (16). The grid-shaped gasket (16.1) is inserted into the nano sleeve (20) by utilizing its concave and convex structure. A silicone gasket (16.2) is provided between the central sleeve (21.1) and the nano sleeve (20). The central sleeve (21.1) is threadedly engaged with the negative pressure tube (16) by its end face nut (16.3) to press the nano sleeve (20) tightly.

5. The intelligent weighing screw filling control system according to claim 2, characterized in that, A flexible connection mechanism is provided between the dust extraction frame (17.1) and the bag clamp (19) to isolate the transmission of vibration and friction generated by the dynamic following dust removal component to the weighing sensor (18); the flexible connection mechanism includes a soft connection structure (17.2), a soft connection pressure plate (17.3) and a sealing gasket (17.4). The two ends of the soft connection structure (17.2) are respectively connected to the dust extraction frame (17.1) and the bag clamp (19) and are fixed by the soft connection pressure plate (17.3).

6. The intelligent weighing screw filling control system according to claim 2, characterized in that, The sealing gasket (17.4) is provided between the lower end of the negative pressure pipe (16) and the dust extraction frame (17.1) and is pressed by the pressure plate (17.5).

7. The intelligent weighing screw filling control system according to claim 2, characterized in that, It also includes an installation platform (1) installed on a fully automatic packaging machine (25), the installation platform (1) being connected to a support frame (5), and the hopper (6) being disposed on the support frame (5); The dynamic following dust removal assembly also includes a dust removal fixing pipe (17.9), a fixing block (17.10), and an adjusting plate (17.11). The dust removal fixing pipe (17.9) is installed on the support frame (5). The dust removal pipe (17.13) is arranged parallel to the dust removal fixing pipe (17.9) along the lifting direction. The fixing block (17.10) is connected between the side wall of the dust removal fixing pipe (17.9) and the installation platform (1). The adjusting plate (17.11) is connected to the installation platform (1) and is connected to a dust removal pipe friction block (17.12) that cooperates with the dust removal pipe (17.13) to support and guide the dust removal pipe (17.13) and keep the dust removal fixing pipe (17.9) and the dust removal pipe (17.13) parallel and without friction.

8. The intelligent weighing screw filling control system according to claim 2, characterized in that, The dust extraction frame (17.1) is provided with a negative pressure pipe friction block (17.6), which is used to limit the gap between the negative pressure pipe (16) and the dust extraction frame (17.1) to avoid contact friction.

9. The intelligent weighing screw filling control system according to claim 1, characterized in that, The dust extraction frame (17.1) is provided with a manual adjustment port (17.7), which is used to adjust the dust extraction cross-sectional area.

10. A smart weighing screw filling control method, characterized in that, The intelligent weighing screw filling control system according to any one of claims 1.9 includes: S1. After the bag feeding machine completes the bag feeding, the robotic arm mechanism (23) performs the bag loading operation, drives the bag clamp (19) to unfold and performs clamping standard judgment; when the judgment does not meet the standard, the air nozzle blowing mechanism is triggered to discard the bag, and the number of discarded bags is counted and recorded, and the discarded bag data is fed back to the control system in real time. When the cumulative number of discarded bags exceeds the preset threshold, the manual intervention prompt is output; when the judgment meets the standard, step S2 is entered. S2, the lifting mechanism motor (3) drives the weighing sensor (18) and bag clamp (19) to move in the vertical direction, and the upper photoelectric detector detects the lifting stroke to the position; if no position signal is detected within the set time window, the lifting mechanism motor (3) is controlled to stop and an alarm is triggered; when the position signal is detected, the lifting mechanism motor (3) is controlled to stop and step S3 is entered. S3. Control the material gate cylinder (15) to drive the material gate (22) to open to the coarse material opening degree, calculate the coarse material speed or target number of revolutions of the screw motor (9) based on the target weight and coarse material time, and drive the screw motor (9) to drive the screw rod (14) to feed material, and start dynamic weighing at the same time. S4. During the dynamic weighing process, the mass data of the weighing sensor (18) is acquired in real time and compared with the reference value. When the mass data is lower than the reference value, it is determined that the gas content of the material is too high, and the nanotube (20) in the negative pressure tube (16) is controlled to adsorb the gas. When the mass data fluctuates abnormally, the nanovacuum rod (4) is controlled to degas the material in the hopper (6) to reduce the gas content of the material before entering the screw feeder and achieve gas balance. S5. Real-time acquisition of the torque parameters of the screw motor (9) to characterize the material flowability; when the torque parameters exceed the preset threshold, control the planetary feeder (7) to stop feeding and reset the detection range of the level gauge (10); when the level gauge (10) is detected to be faulty, control the planetary feeder (7) to perform replenishment. S6. If the preset time is not reached within the coarse material feeding time, the speed of the screw motor (9) is increased to compensate for insufficient material feeding; when the speed exceeds the rated speed threshold, a manual adjustment parameter prompt is output. S7. After the coarse feeding is completed, control the material gate cylinder (15) to close the material gate (22) to the fine feeding opening, control the planetary feeder (7) to stop feeding, control the lifting mechanism motor (3) to pause the downward movement to improve the weighing accuracy, and control the screw motor (9) to reduce the speed to achieve slow and accurate feeding until the quality data reaches the target weight and meets the accuracy requirements. S8. After reaching the target weight, control the material gate (22) to close, control the lifting mechanism motor (3) to drive the weighing sensor (18) and bag clamp (19) to continue to descend to the detection position of the lower photoelectric detector; if the lower position signal is not detected within the set time window, control the lifting mechanism motor (3) to stop and trigger the alarm; when the position signal is detected, control the dynamic following dust removal component to start dust extraction, so that the dust cover (19.1) can remove dust and residual air in the bag, and turn off the dust extraction after completion; S9. After the bag clamp (19) closes the bag opening, the trolley mechanism (24) moves the packaging bag to the heat sealing position to complete the sealing and reset.

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