A feed production line and a control system and method thereof

Abstract

The application discloses a feed production line and a control system and method thereof, and belongs to the technical field of feed production lines. The feed production line comprises a control system, a steel frame, and a feeding device, a mixing device, a screening device and a feed discharging device which are sequentially arranged from top to bottom and are installed on the steel frame. The feeding mechanism of the feeding device is provided with a plurality of storage hoppers, each of which is provided with a weighing sensor and a hopper valve component. The feeding port of the mixing device is connected with the hopper valve component of the feeding device. The feeding port of the screening device is connected with the mixing device. The feeding port of the feed discharging device is connected with the screening device. The control system is connected with the feeding device, the mixing device, the screening device and the feed discharging device respectively. The weight change of the storage hopper is monitored in real time through the weighing sensor, the real-time feeding value and the feeding value percentage can be accurately calculated, the opening and closing degree of the valve is dynamically adjusted according to the real-time data, and intelligent and automatic feeding control is realized.

Description

Technical Field

[0001] This invention relates to the field of feed processing equipment technology, and in particular to a feed production line and its control system and control method. Background Technology

[0002] Powdered feed refers to a compound feed made by crushing various raw materials and mixing them evenly in a certain proportion. The raw materials usually include grains, beans, oilseed meals, and additives. The ratio between the raw materials in powdered feed is the key to ensuring feed quality, and the feeding process in the feed production line is the foundation for achieving highly precise ratios.

[0003] Feed production line feeding equipment relies on valve mechanisms to guide and cut off the feeding of raw materials, and currently, electric valves are mostly used. However, electric valves only have simple opening and closing control, making it difficult to achieve precise feeding of powdered feed. The limitations of existing valve mechanisms can lead to inaccurate raw material feeding, which in turn affects the accuracy of powdered feed formulation and final quality. Summary of the Invention

[0004] To address the technical problems existing in the prior art, the present invention aims to provide a feed production line and its control system and method, which monitors the weight change of the storage hopper in real time through a weighing sensor, accurately calculates the real-time feeding value and the percentage of the feeding value, and dynamically adjusts the opening and closing degree of the valve based on the real-time data, thereby achieving intelligent and automated feeding control.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] In a first aspect, the present invention provides a feed production line, comprising:

[0007] A steel frame, on which a feeding device, a mixing device, a screening device and a feed discharging device are arranged sequentially from top to bottom;

[0008] The feeding device has a feeding mechanism with multiple storage hoppers, each of which is equipped with a weighing sensor and a hopper valve component;

[0009] A mixing device, wherein the inlet of the mixing device is connected to the hopper valve component of the discharging device;

[0010] A screening device, wherein the inlet of the screening device is connected to the mixing device;

[0011] A feed discharging device, wherein the feed inlet of the feed discharging device is connected to the screening device;

[0012] A control system is connected to a feeding device, a mixing device, a screening device, and a feed discharging device.

[0013] The control system is configured to execute a control method for controlling the hopper valve components, the control method comprising the following steps:

[0014] The feeding parameters of the input control system are obtained, including the target total feeding value for each storage hopper;

[0015] Obtain the initial weight G of the storage hopper collected by the weighing sensor. 初 ;

[0016] Obtain the real-time weight G of the storage hopper by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 ;

[0017] The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge.

[0018] In some possible implementations, the screening device includes:

[0019] The substrate is provided with a feeding channel and has multiple connecting components;

[0020] The sieve hopper is connected to multiple connecting components. The sieve hopper is suspended at intervals at the bottom of the base through the multiple connecting components. The sieve hopper is connected to the discharge channel.

[0021] A vibrating motor, which is connected to the outer peripheral wall of the screen hopper;

[0022] The inner cavity of the sieve hopper is provided with a material distribution plate and a screen; the outer peripheral wall of the material distribution plate is spaced apart from the inner cavity wall of the sieve hopper, forming a material discharge channel; the screen is located below the material distribution plate, and the outer peripheral wall of the screen is connected to the inner cavity wall of the sieve hopper.

[0023] In some possible implementations, the substrate is designed as a hollow tubular structure, and the inner cavity of the substrate is provided with a material discharge plate. The material discharge plate has a funnel-shaped structure, and the bottom through hole of the material discharge plate is set directly opposite the material distribution plate.

[0024] The material distribution tray is a cone-shaped hopper with a smooth outer circumference, and the cone apex of the material distribution tray faces the base; the screen is also cone-shaped, and the cone apex of the screen faces the opposite direction to the cone apex of the material distribution tray.

[0025] In some possible implementations, the connecting component includes a stud, a first rubber spring, and a second rubber spring.

[0026] The outer peripheral wall of the substrate has a first flange, the outer peripheral wall of the sieve hopper has a second flange, and the stud passes through the first flange and the second flange;

[0027] The first rubber spring is sleeved on the stud and is disposed on the upper surface of the first flange; the second rubber spring is sleeved on the stud and is disposed on the lower surface of the second flange.

[0028] The stud is threaded with multiple nuts, which lock the first rubber spring and the first flange together, and also lock the second rubber spring and the second flange together.

[0029] In some possible implementations, both the first rubber spring and the second rubber spring adopt a composite rubber spring structure, which includes a rubber elastic body and a plurality of metal collars bonded to the outer peripheral wall of the rubber elastic body.

[0030] A through-hole is provided inside the rubber elastic body for fitting onto the outer periphery of the stud; the outer peripheral surface of the rubber elastic body is configured as a corrugated or drum-shaped profile structure, and the metal collar is disposed on the outer peripheral wall of the corrugated or drum-shaped profile structure of the rubber elastic body.

[0031] In some possible implementations, the feeding device includes a base, a feeding mechanism, and a mixing mechanism. The feeding mechanism is disposed on the upper surface of the base, and the mixing mechanism is disposed on the lower surface of the base. The feeding mechanism is connected to the conical feeding hopper of the mixing mechanism.

[0032] The feeding mechanism includes multiple storage hoppers arranged adjacent to each other; each storage hopper is equipped with a hopper valve component, which is mounted on a base;

[0033] The steel frame includes a support mounted on a base. The storage hopper has two symmetrically distributed weighing sensors, which are deployed on the support of the steel frame. The outer wall of the storage hopper is provided with two hanging ears, which are used to mount the weighing sensors.

[0034] Secondly, the present invention also provides a control system for a feed production line based on the first aspect and its embodiments, the control system comprising a main controller, a fuzzy PID controller and a frequency converter connected in sequence; the hopper valve component adopts an electric rotary valve with a variable frequency speed control motor, and the frequency converter is connected to the electric rotary valve;

[0035] The main controller is configured to execute the following control method for controlling the hopper valve components.

[0036] Thirdly, the present invention also provides a control method for a feed production line based on the second aspect, comprising the following steps:

[0037] The feeding parameters of the input control system are obtained, including the target total feeding value for each storage hopper;

[0038] Obtain the initial weight G of the storage hopper collected by the weighing sensor. 初 ;

[0039] Obtain the real-time weight G of the storage hopper by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 ;

[0040] The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge.

[0041] The preset control strategy includes:

[0042] When the percentage of the material feed is less than the first threshold, the hopper valve component is controlled to be in the fully open state;

[0043] When the percentage of the material feeding value is greater than or equal to the first threshold and the percentage of the material feeding value is less than the second threshold, the hopper valve component is controlled to switch from a fully open state to a half open state.

[0044] When the percentage of material discharge exceeds the second threshold, the fuzzy PID controller is invoked to control the hopper valve component until the percentage of material discharge reaches 100%, at which point the hopper valve component is completely closed.

[0045] In some possible implementations, the fuzzy PID controller is invoked to control the hopper valve component, specifically including the following steps:

[0046] Get the preset target flow value Q 目标 ;

[0047] Calculate the actual feed rate Q(t) at time t. The formula for calculating the actual feed rate Q(t) is Q(t) = (G... t前 -G t后 ) / △t, where △t is the material feeding time difference, G t前 G represents the weight of the storage hopper before Δt. t后 The weight of the storage hopper after Δt;

[0048] Based on the target flow value Q 目标Calculate the deviation e(t) and the rate of change of the difference de(t) based on the actual feed flow rate Q(t), where the rate of change of the deviation de(t) is the rate of change of the deviation e(t) over time.

[0049] The deviation e(t) and the rate of change of deviation de(t) are input into the fuzzy PID controller, and the fuzzy PID controller outputs the fuzzy control quantity u(t).

[0050] The hopper valve component is controlled according to the fuzzy control quantity u(t).

[0051] In some possible implementations, the fuzzy PID controller utilizes an improved genetic algorithm to optimize the fuzzy quantization factor of the fuzzy PID controller, wherein the fuzzy quantization factor is K. e(t) K de(t) K kp K ki and K kd ; wherein, the K e(t) K is the quantization factor for the deviation e(t); de(t) The quantization factor for the rate of change of deviation de(t), the K kp For the proportional parameter K p The quantization factor, the K ki For the integration parameter K i The quantization factor, the K kd For the differential parameter K d Quantification factor;

[0052] The improved genetic algorithm optimization includes the following steps:

[0053] Set the fuzzy quantization factor K e(t) K de(t) and K kp The scope of optimization;

[0054] Using binary encoding, the fuzzy quantization factor K is... e(t) K de(t) K kp K ki and K kd Encode them into binary numbers and form the chromosomes of individuals in the initial population;

[0055] Construct a fitness function F, and calculate the fitness value of each individual in the initial population based on the fitness function F; the mathematical expression of the fitness function F is:

[0056] In the formula, For accuracy indicators, For energy consumption and smoothing indicators, For efficiency indicators, Here, k is the weighting coefficient, and k is the scaling factor;

[0057] Using a roulette wheel strategy and an elite strategy, several random individuals and the optimal solution individual are selected from the initial population, respectively.

[0058] A new population is generated by crossbreeding and mutating several random individuals and the optimal solution individuals; among them, the mutation operation introduces the mutation probability of powder working conditions.

[0059] Repeat the above steps to continue iterating on the new population. When the iteration threshold is met, output the optimal solution individual of the last iteration.

[0060] Decode the individual optimal solution.

[0061] Compared with the prior art, the present invention has at least the following beneficial effects:

[0062] 1. This invention provides a feed production line, including a control system and a steel frame, and a feeding device, a mixing device, a screening device, and a feed discharging device arranged sequentially from top to bottom on the steel frame. The feeding device has multiple hoppers, each equipped with a weighing sensor and a hopper valve component. The inlet of the mixing device is connected to the hopper valve component of the feeding device. The inlet of the screening device is connected to the mixing device. The inlet of the feed discharging device is connected to the screening device. The control system is connected to the feeding device, the mixing device, the screening device, and the feed discharging device. The control system is configured to execute a control method for controlling the hopper valve component, the control method including the following steps: acquiring feeding parameters input to the control system, the feeding parameters including the target total feeding value of each hopper; acquiring the initial weight G of the hopper collected by the weighing sensor. 初 ; Obtain the real-time weight G of the storage hopper, which is collected in real time by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge.

[0063] This invention uses a weighing sensor to monitor the weight changes in the storage hopper in real time, accurately calculating the real-time discharge value and percentage. Based on this real-time data, the opening and closing degree of the valve is dynamically adjusted, achieving intelligent and automated discharge control. Compared to traditional electric valves that only offer opening and closing control, this invention provides more precise control over the discharge amount, effectively reducing discharge errors and ensuring more accurate raw material ratios for powdered feed. By precisely controlling the discharge amount, production fluctuations and quality problems caused by inaccurate discharge are avoided, making the feed production process more stable and reliable, and contributing to improved stability in continuous feed production. Attached Figure Description

[0064] Figure 1 This is a three-dimensional structural schematic diagram of a feed production line according to the present invention;

[0065] Figure 2 This is a flowchart of an algorithm for a feed production line according to the present invention;

[0066] Figure 3 This is a block diagram of the fuzzy PID controller principle of the present invention;

[0067] Figure 4 The schematic diagram shows the improved genetic algorithm-optimized fuzzy PID controller of this invention.

[0068] Figure 5 This is a side view of a feed production line according to the present invention;

[0069] Figure 6 This is a schematic diagram of the feeding device structure of a feed production line according to the present invention;

[0070] Figure 7 This is a schematic diagram of the structure of the mixing component of the feeding device in a feed production line according to the present invention;

[0071] Figure 8 This is a schematic diagram showing the valve core of the hopper valve component of the present invention in a fully open, half-open, and fully closed state.

[0072] Figure 9 This is a schematic diagram of the structure of a screening device for a feed production line according to the present invention;

[0073] Figure 10 This is a schematic AA cross-sectional view of a screening device for a feed production line according to the present invention;

[0074] Figure 11 This is an assembly diagram of a screening device for a feed production line according to the present invention;

[0075] Figure 12 This is a schematic diagram of the structure of a feed conveying device in a feed production line according to the present invention;

[0076] Figure 13 This is a schematic AA cross-sectional view of a screening device for a feed production line according to the present invention;

[0077] Figure 14 This is a schematic diagram of the clamp structure of a feed conveying device in a feed production line according to the present invention;

[0078] In the picture:

[0079] 100 - Steel frame, 110 - Weighing sensor;

[0080] 200-Discharge device, 210-Base, 220-Discharge mechanism, 221-Storage hopper, 2211-Hanging lug, 222-Hopper valve component, 2221-Valve core, 230-Mixing mechanism, 231-Conical discharge hopper, 232-Agitating component, 2321-Agitating shaft, 2322-Agitating impeller, 2323-Helical blade.

[0081] 300 - Mixing device;

[0082] 400-Screwing device, 410-Base, 411-Discharge plate, 420-Connecting component, 421-Stud, 422-First rubber spring, 423-Second rubber spring, 430-Screw hopper, 431-Distribution plate, 432-Screw, 440-Vibrating motor, 450-Corrugated rubber sleeve, 460-Screw conveyor;

[0083] 500-Feed conveying device, 510-Frame, 520-Housing, 521-Feeding pipe fitting, 522-Feed conveyor, 523-Discharge hopper, 524-Collection hopper, 530-Clamping fixture, 531-Drive component, 5311-Cylinder, 5312-Hinge seat, 5313-Double elbow joint, 532-Clamping component, 5321-Swing arm, 5322-Fixed shaft, 5323-Clamping arm, 5324-Clamping piece;

[0084] 600 - Packaging bag. Detailed Implementation

[0085] To facilitate understanding of the present invention, the technical solutions and advantages of the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Any mechanisms or methods not elaborated in this invention can be referred to in the prior art. The specific structures and features of the present invention are illustrated below by way of example and should not be construed as limiting the present invention in any way. Furthermore, any of the technical features mentioned below (including implicit or disclosed features), as well as any technical features directly shown or implied in the figures, can be arbitrarily combined or deleted among these technical features to form more other embodiments that may not be directly or indirectly mentioned in this invention. The accompanying drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.

[0086] Feed production line feeding equipment relies on valve mechanisms to guide and cut off the feeding of raw materials, and currently, electric valves are mostly used. However, electric valves only have simple opening and closing control, making it difficult to achieve precise feeding of powdered feed. Moreover, due to the characteristics of powdered raw materials, the limitations of the simple control of existing electric valves can lead to inaccurate feeding amounts, making it difficult to achieve good feeding control, and thus affecting the accuracy of powdered feed formulation and final quality.

[0087] Therefore, the electric valves of the current feed production line's feeding device suffer from simple and outdated control methods, failing to achieve precise control over the feeding of powdered feed ingredients. To address this, the present invention provides a control method for controlling the feeding of raw materials in a feed production line. The feed production line includes a control system and a feeding device connected together. The feeding mechanism of the feeding device has multiple storage hoppers, each equipped with a weighing sensor and a hopper valve component. The control method includes: acquiring feeding parameters input to the control system, the feeding parameters including the target total feeding value for each storage hopper; and acquiring the initial weight G of the storage hopper collected by the weighing sensor. 初 ; Obtain the real-time weight G of the storage hopper, which is collected in real time by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge.

[0088] This invention uses a weighing sensor to monitor the weight changes in the hopper in real time, accurately calculating the real-time discharge value and percentage. Based on this real-time data, the opening and closing degree of the valve is dynamically adjusted, achieving intelligent and automated discharge control. Compared to traditional electric valves that only offer opening and closing control, this invention provides more precise control over the discharge amount, effectively reducing discharge errors and ensuring more accurate raw material ratios for powdered feed. It avoids production fluctuations and quality problems caused by inaccurate discharge amounts, contributing to improved stability in continuous feed production.

[0089] Example 1

[0090] like Figure 1 and Figure 2 As shown, this is a feed production line to which the control method of the present invention is applied. The feed production line includes a steel frame 100, a feeding device 200, a mixing device 300, a screening device 400, and a feed discharging device. The feeding device 200, mixing device 300, screening device 400, and feed conveying device are sequentially deployed on the steel frame 100 from top to bottom to achieve continuous production of powdered feed. Specifically, the feeding mechanism 220 of the feeding device 200 has multiple storage hoppers 221, each storage hopper 221 is equipped with a weighing sensor 110 and a hopper valve component 222. The feed inlet of the mixing device 300 is connected to the hopper valve component 222 of the feeding device 200; the feed inlet of the screening device 400 is connected to the mixing device 300; and the feed inlet of the feed conveying device is connected to the screening device 400.

[0091] In one specific implementation, the feed production line also includes a control system, which is connected to the feeding device 200, mixing device 300, screening device 400, and feed conveying device. The control system is a key component for achieving automated production. In one embodiment, the control system includes electrical components such as a main controller, a fuzzy PID controller, and a frequency converter connected in sequence. The main controller is connected to the weighing sensor 110 of the feeding device 200, and the frequency converter is connected to the hopper valve component 222 of the feeding device 200.

[0092] In this embodiment, the steel frame 100 is the basic structure of the feed production line, serving to support and stabilize the entire production line. The steel frame 100 is made of high-strength steel, which possesses high tensile strength, compressive strength, and good toughness, providing a stable mounting platform for the feeding device 200, mixing device 300, screening device 400, and feed conveying device, ensuring the equipment remains stable during operation and preventing displacement or shaking. By deploying and installing the various functional devices sequentially from top to bottom, the aim is to utilize gravity to achieve the natural flow of materials. This layout better enables continuous production of powdered feed, significantly improving production efficiency.

[0093] Regarding the feeding device 200, its multiple hoppers 221 store different feed ingredients, and each hopper 221 is equipped with a weighing sensor 110 that can monitor the weight of the material inside the hopper in real time. When feeding is required, the control system controls the opening and closing of the hopper valve component 222 according to the preset formula and weight requirements, precisely discharging the required weight of raw materials from the hopper 221. This design enables precise batching of multiple raw materials, ensuring the accuracy of the feed formula.

[0094] In this specific implementation, the storage hopper 221 has two symmetrically distributed load cells 110, which are deployed on the steel frame 100. The outer wall of the storage hopper 221 has lugs 2211 adapted to the two load cells 110, and the storage hopper 221 is placed directly on the load cells 110 through the two lugs 2211. It can be understood that the storage hopper 221 is suspended on the steel frame 100, and the two load cells 110 provide support and enable the quality detection of the storage hopper 221.

[0095] Regarding the mixing device 300, its inlet is connected to the hopper valve component 222 of the discharging device 200, receiving various raw materials from the discharging device 200. The mixing device 300 uses mechanical stirring to thoroughly mix the different raw materials evenly. The outlet of the mixing device 300 is equipped with an electric valve, which is closed during mixing. After mixing is complete, the electric valve opens, and the mixed feed raw materials enter the screening device 400 for screening.

[0096] In this field, the mixing device 300 is a commonly used stirring device. The mixing device 300 is typically equipped with a mechanical stirrer, which drives the stirring shaft 2321 and stirring blades to rotate via a motor, thereby achieving the mixing of raw materials. The design of the stirrer can be optimized according to the characteristics of the raw materials and mixing requirements, for example, using various forms such as spiral stirring belts or stirring rods. The mixing device 300 can be a vertical double-spiral conical mixer, with a discharge hole and an electric valve at the bottom for discharging materials. After the electric valve is opened, the materials can be automatically discharged into the screening device 400 under gravity.

[0097] Regarding the screening device 400, its inlet is connected to the mixing device 300. Its function is to screen the mixed feed, removing powdery particles that do not meet the particle size requirements. The screening device 400 can be designed to meet different screening requirements and ensure feed quality.

[0098] Regarding the feed discharging device, the feed inlet of the feed discharging device is connected to the screening device 400. The feed discharging device is the terminal equipment of the feed production line, and its main function is to quantitatively package the screened and conveyed feed.

[0099] Figure 2 This is a flowchart of a control method according to an embodiment of the present invention. The control method of this embodiment is used to control the feeding of raw materials in a feed production line. This control method can be executed by the control system of the feed production line, which can be implemented in hardware and / or software, such as the main controller of the control system and an application program deployed on the main controller. Figure 2 As shown, the control method includes the following steps for controlling the hopper valve component 222:

[0100] S100: Obtain the feeding parameters from the input control system, including the target total feeding value for each hopper.

[0101] S200: Obtain the initial weight G of the hopper collected by the weighing sensor. 初 .

[0102] S300: Obtain the real-time weight G of the hopper, which is collected in real time by the weighing sensor. 实 Calculate the real-time feeding value, where real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 .

[0103] S400: Controls the opening and closing degree of the hopper valve components according to the percentage of material discharge and the preset control strategy; Percentage of material discharge = Real-time material discharge value / Target total material discharge value.

[0104] Specifically, the present invention provides a detailed description of each step of the control method:

[0105] S100: Obtain the feeding parameters from the input control system, including the target total feeding value for each hopper.

[0106] In practice, before production begins, operators input the target total feed value for each hopper into the control system according to the feed formula requirements. These parameters form the basis for subsequent control, determining the weight of raw materials to be released from each hopper. In one implementation, the control system has a touchscreen or operation panel connected to the main controller. This human-machine interface receives the target total feed value input by the operator and stores it in the system's memory for later retrieval.

[0107] S200: Obtain the initial weight G of the hopper collected by the weighing sensor. 初 .

[0108] In practice, before the material feeding begins, a weighing sensor measures the initial weight G of each hopper. 初 The data is then transmitted to the control system. The initial weight is the initial weight of the raw material in the storage hopper.

[0109] In one example, the load cell is a resistance strain gauge load cell, which is widely used in industrial weighing due to its advantages such as high accuracy, good stability and moderate cost.

[0110] S300: Obtain the real-time weight G of the hopper, which is collected in real time by the weighing sensor. 实 Calculate the real-time feeding value, where real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 .

[0111] In practice, during the material feeding process, the weighing sensor collects the real-time weight G of the storage hopper. 实 The data is then transmitted to the control system. The control system uses the formula "Real-time feeding value = Initial weight G" to calculate the feed rate. 初 -Real-time weight (G) 实 "The real-time discharge value is calculated. The weighing sensor monitors the weight change of the storage hopper in real time and transmits the data to the control system. The control system calculates the weight of the raw material that has been discharged in real time through a simple subtraction operation."

[0112] The material feeding process is monitored in real time to ensure the accuracy of the feeding quantity. By calculating the feeding value in real time, the control system can dynamically adjust the feeding flow rate.

[0113] S400: Controls the opening and closing degree of the hopper valve components according to the percentage of material discharge and the preset control strategy; Percentage of material discharge = Real-time material discharge value / Target total material discharge value.

[0114] Understandably, the control system calculates the current percentage of material feeding progress using the formula "Percentage of material feeding = Real-time material feeding / Target total material feeding". Based on a preset control strategy, the control system adjusts the opening and closing degree of the hopper valve components to control the material feeding speed.

[0115] In practical implementation, the preset control strategies include:

[0116] (1) When the current material value percentage is less than the first threshold, the control hopper valve component is in the fully open state.

[0117] It should be noted that during the initial feeding stage, the hopper valve is fully open to maximize feeding speed and minimize feeding time. Rapid feeding shortens the overall feeding process and improves production efficiency.

[0118] (2) When the percentage of material feeding is greater than or equal to the first threshold and the percentage of material feeding is less than the second threshold, the control hopper valve component is switched from fully open to half open.

[0119] It should be noted that when the percentage of material discharged reaches the first threshold, the hopper valve switches from fully open to partially open. The goal of this stage is to slow down the discharge rate, providing more stable conditions for subsequent precise control. By adjusting the valve's opening degree, the powder discharge flow rate is reduced to a suitable level. Slowing down the discharge rate helps improve discharge accuracy and reduces errors caused by excessive speed.

[0120] (3) When the percentage of the material feeding value is greater than the second threshold, the fuzzy PID controller is called to control the hopper valve component until the percentage of the material feeding value is 100%, and then the hopper valve component is completely closed.

[0121] It should be noted that when the percentage of material being discharged approaches the target value, a fuzzy PID controller is invoked to precisely control the hopper valve. The fuzzy PID controller combines the advantages of fuzzy logic and PID control algorithms, enabling high-precision control under complex operating conditions. Ultimately, when the target discharge rate is reached, the hopper valve completely closes.

[0122] Through the aforementioned three-stage control strategy, the control method of this invention enables a transition from rapid feeding to precise control. This phased control strategy combines the efficiency advantages of rapid feeding with the accuracy advantages of precise control, ensuring the high efficiency and accuracy of the entire feeding process. Simultaneously, the application of a fuzzy PID controller further enhances the intelligence and adaptability of the control system, enabling it to operate stably under complex operating conditions and providing a strong guarantee for the efficient and stable production of the feed production line.

[0123] In one specific implementation, the first threshold is set to 80-85%, and the second threshold is set to 90-95%. The rationale for setting these thresholds is as follows:

[0124] First threshold (80%–85%): In the initial stage of material feeding, feed quickly to approach 80%–85% of the target value. At this point, the feeding speed is relatively fast, which can quickly approach the target value, while leaving enough room for adjustment in subsequent precise control.

[0125] Second threshold (90%–95%): When approaching the target value, switch to a fuzzy PID controller for precise control. At this point, the feeding speed is slower, allowing for precise control of the feeding amount and preventing overfeeding.

[0126] In a specific implementation, such as Figure 3 As shown, the process of using a fuzzy PID controller to control the hopper valve component includes the following steps:

[0127] S410: Obtain the preset target flow value Q 目标 .

[0128] In practice, a target flow rate value Q is preset in the control system. 目标 During the feeding process in the feed production line, a reasonable target feed flow rate value Q needs to be determined. 目标 It plays a crucial role in precise control. Since the feed flow rate is closely related to the characteristics of the powder (such as particle size, density, and flowability) and the performance of the hopper valve components, it is necessary to comprehensively consider these factors when setting the target flow rate value.

[0129] In practice, the performance of the hopper valve components can be considered. The type of hopper valve, its opening adjustment range, and its response speed all affect the discharge flow rate. For example, valve type: different types of valves have different flow control capabilities. Opening adjustment range: the valve's opening adjustment range determines the adjustable range of the flow rate. Response speed: the valve's response speed needs to match the adjustment frequency of the control system.

[0130] In another implementation, a reasonable target flow rate value Q can be set based on the operator's experience, combined with the characteristics of the powder and the performance of the equipment. 目标 .

[0131] S420: Calculate the actual feed rate Q(t) at time t. The formula for calculating the actual feed rate Q(t) is Q(t) = (G t前 -G t后 ) / △t, where △t is the material feeding time difference, G t前 G represents the weight of the storage hopper before Δt. t后 The value is the weight of the storage hopper after Δt.

[0132] Understandably, this method involves using load cells to collect real-time data on changes in the weight of the storage hopper and calculating the discharge flow rate per unit time using a simple differential method. This approach is based on the principle of mass conservation, indirectly measuring the discharge flow rate through changes in weight.

[0133] S430: Based on the target flow rate value Q 目标 Given the actual feed rate Q(t), calculate the deviation e(t) and the rate of change of the difference de(t). The rate of change of the deviation de(t) is the rate of change of the deviation e(t) over time.

[0134] In practical implementation, the deviation e(t) reflects the difference between the actual feed flow rate and the target feed flow rate, while the deviation change rate de(t) reflects the trend of deviation change. These two parameters are the core inputs of the PID control algorithm, used to dynamically adjust the control quantity.

[0135] In this field, the deviation e(t) = target flow rate Q 目标 - Actual material flow rate Q(t). The rate of change of the difference de(t) is the rate of change of the deviation over time, i.e. .

[0136] Function: By calculating the deviation and the rate of change of deviation, it provides input signals to the fuzzy PID controller, enabling it to dynamically adjust the control strategy according to the difference between the actual flow rate and the target flow rate.

[0137] S440: Input the deviation e(t) and the rate of change of deviation de(t) into the fuzzy PID controller, and the fuzzy PID controller outputs the fuzzy control quantity u(t).

[0138] Understandably, the fuzzy PID controller calculates the fuzzy control quantity u(t) based on the input deviation e(t) and the rate of change of deviation de(t) through fuzzy inference and defuzzification processes. This process is dynamic, meaning the valve opening is adjusted according to the real-time deviation between the feed flow rate and the target flow rate.

[0139] In this field, fuzzy rules are the core of fuzzy controllers. Through a preset rule base, deviations and deviation change rates are mapped to fuzzy control quantities.

[0140] S450: Control the hopper valve components according to the fuzzy control quantity u(t).

[0141] In one specific implementation, the fuzzy control quantity is used as the input of the frequency converter, and the frequency converter controls the hopper valve component to control the degree of opening and closing of the hopper valve component.

[0142] In practical implementation, the hopper valve component adopts an electric rotary valve with a variable frequency speed control motor, and the control system includes a frequency converter connected to the electric rotary valve. Specifically, the hopper valve component is controlled using a fuzzy control quantity u(t). The fuzzy control quantity u(t) is input into the frequency converter, which controls the variable frequency speed control motor to control the angular velocity of the variable frequency speed control motor, thereby controlling the rotation angle of the valve core of the electric rotary valve.

[0143] In this field, the valve of this type of electric rotary valve is controlled by a motor driving the valve core to rotate, thereby controlling the degree of valve opening and closing. The structural design of the electric rotary valve allows for precise control of the valve core's rotation angle through the angular velocity of the motor, thus achieving fine regulation of the material flow rate. The frequency converter is a key device connecting the fuzzy controller and the electric rotary valve. It receives the fuzzy control quantity u(t) as an input signal, adjusts the power supply frequency of the motor to control the motor speed, and thus controls the rotation angle of the valve core of the electric rotary valve.

[0144] In another specific implementation, the hopper valve component is already in a half-open state before fuzzy control begins. At this point, the hopper valve component has switched from a fully open state to a half-open state, its opening degree has decreased from fully open, the purpose of which is to reduce the material flow rate, thereby achieving more precise control. Therefore, during the fuzzy PID controller's control of the hopper valve component, the opening degree of the hopper valve component cannot exceed the lower opening degree of the half-open state to ensure precise control. Simultaneously, this premise should also be considered when setting the target flow rate value Q.

[0145] It should be noted that fuzzy PID control, based on traditional PID control, fuzzifies the proportional, integral, and derivative parameters of the PID controller to achieve more precise control. The control method of this invention uses the difference e(t) between the target flow rate of the powder raw material and the actual flow rate measured by the pressure sensor, and the rate of change of this difference de(t), as inputs to the fuzzy controller. The Kp, Ki, and Kd parameters of the fuzzy controller are used as output variables. After defuzzification, the fuzzy output control quantity is obtained and used as input to the frequency converter to control the speed of the variable frequency adjustable motor of the electric rotary valve.

[0146] For complex nonlinear systems, a fuzzy PID nonlinear control system was implemented by combining fuzzy strategies, but the difficulty of parameter tuning still exists. This is particularly true for applications involving feed powder feeding, where parameter tuning is extremely challenging. To address this issue, this technology optimizes the fuzzy PID controller using a preset algorithm. This preset algorithm utilizes an improved genetic algorithm to optimize the fuzzy quantization factor of the fuzzy PID controller. By improving the standard genetic algorithm, its shortcomings are overcome, and the improved genetic algorithm is used to optimize the fuzzy PID controller.

[0147] It should be noted that regarding the optimization requirements of fuzzy PID controllers, these controllers combine the advantages of fuzzy logic and PID control, enabling them to handle system uncertainties and nonlinear characteristics, and improve the stability and adaptability of the control system. However, the performance of fuzzy PID controllers depends on the appropriate setting of fuzzy rules, membership functions, and quantization factors. Optimizing these parameters is crucial for improving controller performance.

[0148] Fuzzy PID controllers require extensive human experience and numerous experiments to obtain optimal parameters. Therefore, as... Figure 4As shown, this invention utilizes an improved genetic algorithm to optimize the fuzzy quantization factor of a fuzzy PID controller, achieving the effect of optimizing the membership function and fuzzy universe of discourse, overcoming the inherent shortcomings of the fuzzy PID controller, and simultaneously improving the controller's performance. This invention reduces reliance on human experience and improves the efficiency of controller design. By optimizing the fuzzy quantization factor of the fuzzy PID controller using an improved genetic algorithm, precise control of feed flow rate can be achieved, improving the production efficiency and product quality of powdered feed.

[0149] In a specific implementation of this invention, the input variables of the fuzzy PID controller are the flow deviation e(t) and the rate of change of the deviation de(t). The output variables are the PID parameters ΔKp, ΔKi, and ΔKd. The fuzzy universe of discourse for each variable is set to [-3K, -2K, -K, 0, K, 2K, 3K], and the fuzzy quantization factor of the fuzzy subset and membership function is adjusted to K. e(t) K de(t) K kp K ki and K kd All variables use triangular membership functions. The fuzzy rule language set is [NB, NM, NS, ZO, PS, PM, PB].

[0150] For the feed powder feeding operation, the optimization range of the fuzzy quantization factor was recalibrated to adapt to the changing characteristics of the powder flow rate. The optimized optimization range is: K e(t) For [-0.8, 0.8], K de(t) For [-0.9, 0.9], K kp For [-0.01, 0.01], K ki For [-0.008, 0.008] and K kd The value is [-0.008, 0.008].

[0151] In a specific implementation of the present invention, the preset algorithm specifically includes the following steps:

[0152] S10: Set the fuzzy quantization factor of the fuzzy PID controller to K. e(t) K de(t) K kp K ki and K kd The K e(t) K is the quantization factor for the deviation e(t); de(t) The quantization factor for the rate of change of deviation de(t), the K kp For the proportional parameter K p The quantization factor, the K ki For the integration parameter K i The quantization factor, the K kd For the differential parameter Kd Quantification factor.

[0153] Understandably, these quantization factors determine the importance of deviation and deviation change rate in fuzzy inference, as well as the adjustment range of PID parameters, directly affecting the performance of the fuzzy PID controller.

[0154] S20: Set the fuzzy quantization factor K e(t) K de(t) and K kp The scope of optimization.

[0155] By setting a reasonable optimization range, the search space can be effectively narrowed, improving the optimization efficiency of the genetic algorithm. In one example, combining K... e(t) The range of K is [-1, 1]. de(t) The range is [-1.2, 1.2]. K kp The range is [-0.01, 0.01].

[0156] S30: Using binary encoding, the fuzzy quantization factor K e(t) K de(t) K kp K ki and K kd Encode them into binary numbers and form the chromosomes of individuals in the initial population.

[0157] In one implementation, the fuzzy quantization factor K is... e(t) K de(t) K kp K ki and K kd The quantization factor is encoded into binary numbers and used to form the chromosomes of individuals in the initial population. For example, if each quantization factor is represented by an 8-bit binary number, and the binary numbers of each quantization factor are concatenated sequentially to form a complete numerical sequence, then the chromosome length of each individual is 40 bits.

[0158] In one specific implementation, a constraint-controlled genome generation algorithm can be used to generate all other individuals in the initial population. The initial population size is set to 100. The first individual is replicated multiple times, serving as the basis for generating other individuals. Genetic mutations are performed on the replicated individuals. Based on constraints, each gene is randomly mutated while ensuring that the mutated individuals still satisfy the set constraints. Mutations can include fine-tuning of chromosomes, replacement of chromosomal gene segments, etc.

[0159] S40: Construct the fitness function F, and calculate the fitness value of each individual in the initial population based on the fitness function F.

[0160] In this field, the fitness function is used to evaluate the quality of each individual and is crucial for the optimization of genetic algorithms. By designing a suitable fitness function, the algorithm can be guided to evolve towards the optimal solution.

[0161] In light of the specific application scenarios of this invention, and in order to achieve scientific tuning of the fuzzy quantization factors Ke(t), Kde(t), Kkp, Kki, and Kkd under complex nonlinear conditions, this embodiment adopts the following improved fitness function:

[0162] ;

[0163] in, For the accuracy metric, the ITAE (Time Multiplied by the Integral of Absolute Error) metric is used, introducing the time variable t as a penalty factor. This means that the longer the system runs, the larger the denominator will become if the deviation e(t) still exists, resulting in extremely low fitness. This forces the algorithm to eliminate steady-state error to ensure accurate material feeding percentages.

[0164] The energy consumption and smoothing index is calculated by summing the rate of change of the control quantity and accumulating the absolute value of the difference between the control outputs at adjacent sampling times. u(t) represents the fuzzy control quantity output by the fuzzy PID controller at time t, directly corresponding to the frequency output of the frequency converter. Considering the physical characteristics of the frequency converter and the rotary valve motor, if the output u(t) fluctuates drastically, it will cause frequent acceleration and deceleration of the motor, resulting in current surges. A smaller value for this index indicates a smoother control curve, effectively reducing current surges caused by frequent acceleration and deceleration of the motor, thus extending equipment life and improving repeatability control accuracy.

[0165] This is an efficiency metric, specifically the system settling time, defined as the shortest time required for the percentage of the material feed rate to enter and remain within a steady-state error band of ±0.1% from the moment fuzzy PID control is invoked. This metric is directly related to production efficiency. Under the premise of ensuring accuracy, The shorter the cycle, the faster the feeding cycle, and the higher the overall capacity of the feed production line.

[0166] k is a scaling factor, a preset constant coefficient used to adjust the order of magnitude of the fitness value, preventing the calculation result from being too small and causing the algorithm iteration to fail. These are the weighting coefficients. , It can be obtained through expert scoring / analytic hierarchy process (AHP).

[0167] The fitness function described above is applied to this scheme to iteratively optimize the quantization factor of the fuzzy PID controller. The maximum value of the fitness function F is taken as the optimization target, and finally the optimal parameter combination is obtained.

[0168] S50: Using a roulette wheel strategy and an elite strategy, several random individuals and the optimal solution individual are selected from the initial population, respectively.

[0169] In practical implementation, the roulette wheel algorithm randomly selects individuals with high fitness from the current population and passes them on to the next generation with a certain probability. The elitist strategy, on the other hand, retains the highest-fitting individuals and directly passes them on to the next generation. The roulette wheel algorithm selects individuals based on their fitness, ensuring randomness and a positive correlation between selection and fitness. The elitist strategy ensures that the genetic information of superior individuals is preserved, accelerating the algorithm's convergence speed.

[0170] S60: Cross and mutate several random individuals and the optimal solution individuals to generate a new population.

[0171] In practice: Hybridization (crossover): Using single-point or two-point crossover, randomly select parts of the genes of two individuals for crossover and combination to generate new individuals. Mutation: Using position inversion, randomly change parts of the genes of individuals to increase population diversity.

[0172] In a preferred embodiment, the probability of powder condition variation is simultaneously introduced into the variation operation: when When the value is <0.9 (the powder flowability deteriorates), the mutation probability Pm will be increased by 10%, specifically as follows: This increases population diversity, enabling the algorithm to quickly adapt to changes in powder processing conditions. 0.9≤ When < 1.0, maintain the existing mutation probability. When the value is ≥1.0, the original mutation probability is restored to ensure the convergence speed of the algorithm.

[0173] In the feed production process, fluctuations in the moisture content, fineness, and bulk density of raw materials often cause nonlinear changes in the flowability of powder, making it difficult to consistently maintain optimal preset control parameters. Therefore, this embodiment introduces a powder condition variation probability adjustment mechanism during the iterative process of the improved genetic algorithm to enhance the algorithm's ability to perceive and adapt to changes in material conditions.

[0174] Specifically, the system monitors the feedback data from the weighing sensors in real time and defines evaluation factors for powder working conditions. The value ranges from 0.6 to 1.4, where <0.9 corresponds to operating conditions with slow material feeding and poor fluidity. ≥1.0 corresponds to a working condition with fast material feeding and excessive fluidity; 0.9≤ <1.0 corresponds to the normal operating condition of smooth material feeding, reflecting the actual smoothness of powder feeding in the storage hopper at time t. Specifically, The mathematical expression is:

[0175] ;

[0176] in, It is the actual discharge flow rate of powder in the storage hopper at time t. This reflects the actual feeding speed of the powder at time t. It is the preset average discharge flow rate of the storage hopper to complete the target material discharge. , The target total discharge value of the storage hopper. To set the reference feeding time, this parameter is a fixed value preset by the control system based on experience from the feed production line (e.g., preset to 60s-100s) to establish a stable flow rate reference system. The system calculates the flow rate in real time every interval Δt (e.g., 1s). and according to The value of Pm is dynamically adjusted to change the mutation probability, thereby achieving adaptive adjustment of working conditions during the iteration process of the genetic algorithm.

[0177] Understandably, crossover can generate new gene combinations, increasing population diversity; mutation can prevent the algorithm from getting trapped in local optima, improving global search capabilities. In a specific implementation, the crossover probability Pc and mutation probability Pm determine the convergence speed and diversity of the population.

[0178] S70: Repeat the above steps to continue iterating on the new population. When the iteration threshold is met, output the optimal solution individual of the last iteration.

[0179] By repeating steps S40 to S60, the new population is iteratively optimized. When the iteration threshold is met (in one example, 80 to 100 iterations), the optimal solution for the final iteration is output. Through multiple iterations, the fuzzy quantization factor is gradually optimized, ultimately yielding the optimal controller parameters and improving the performance of the control system.

[0180] S80: Decode the individual solution that is the optimal solution.

[0181] The binary encoding of the optimal solution is decoded into the actual fuzzy quantization factor value. The decoded optimal parameters are written into the parameter configuration module of the fuzzy PID controller to replace the original parameters, thus completing the parameter tuning of the controller for subsequent feed feeding closed-loop control.

[0182] Based on the fuzzy quantization factor that has been tuned, the optimal PID control parameters are obtained in real time online by combining fuzzy inference rules. Finally, the optimal PID parameters Kp, Ki and Kd are output for the fuzzy PID controller.

[0183] To overcome the shortcomings of traditional fuzzy PID parameter tuning, which is difficult and relies heavily on manual experience, this scheme introduces an improved genetic algorithm to scientifically tune the fuzzy quantization factor. The algorithm constructs an initial population using binary encoding and iteratively optimizes it using a specific fitness function F. This fitness function not only includes the integral of time-in-absolute error (ITAE) to eliminate steady-state error and improve accuracy, but also introduces energy consumption and smoothing indices. By accumulating the absolute value of the difference in control outputs, it constrains drastic fluctuations in the inverter output, thereby improving production efficiency and ensuring the feed percentage. Finally, the system uses a roulette wheel and elite strategy to select and decode the optimal solution, outputting the optimal PID parameters applied to the inverter. This achieves precise adjustment of the electric rotary valve's rotation angle, ensuring the efficient and stable operation of the feed production line under complex nonlinear conditions.

[0184] In a specific implementation of this invention, the control system includes a main controller and a fuzzy PID controller. The main controller is used to execute the following steps for controlling the hopper valve components: acquiring input feeding parameters, which include the target total feeding value for each hopper; and acquiring the initial weight G of the hopper collected by a weighing sensor. 初 Obtain the real-time weight G of the storage hopper, which is collected in real time by the weighing sensor. 实 Calculate the real-time feeding value, where real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge value / target total material discharge value.

[0185] Example 2

[0186] This second embodiment provides a specific implementation of the feeding device 200 based on the feed production line of the first embodiment. This second embodiment provides a detailed description of the specific structure and shape of the feeding device 200.

[0187] like Figure 6 , Figure 7 and Figure 8 As shown, the feed feeding device 200 includes a base 210, a feeding mechanism 220, and a mixing mechanism 230. The feeding mechanism 220 is disposed on the upper surface of the base 210. The mixing mechanism 230 is disposed on the lower surface of the base 210, and the feeding mechanism 220 is connected to the conical feeding hopper 231 of the mixing mechanism 230.

[0188] The base 210 is the supporting structure for the entire device, used to fix the feeding mechanism 220 and the mixing mechanism 230. The design of the base 210 needs to ensure the stability and durability of the device, and it is typically made of high-strength steel. In practice, the base 210 is fixed to the top of the steel frame 100. The base 210 is welded from several square steel or I-beams, then steel plates are laid on top and welded together. The feeding mechanism 220 is located on the upper surface of the base 210, and its main function is to guide feed ingredients from above into the mixing mechanism 230.

[0189] In one specific implementation, the feeding mechanism 220 includes multiple storage hoppers 221, which are arranged adjacent to each other. Each storage hopper 221 is equipped with a hopper valve component 222, which is used to open and close the discharge port of the storage hopper 221. The hopper valve component 222 is mounted on the base 210.

[0190] Specifically, the steel frame 100 includes a support mounted on the base 210. The storage hopper 221 has two symmetrically distributed load cells 110. The two load cells 110 are deployed on the support of the steel frame 100 and then mounted on the load cells 110 via two lugs 2211 on the outer side wall of the storage hopper 221. It can be understood that the storage hopper 221 is suspended on the steel frame 100, supported by the two load cells 110, which also enable quality monitoring of the storage hopper 221.

[0191] This technical solution utilizes a multi-compartment feeding mechanism 220 to achieve classified storage and feeding of feed. The design of multiple storage hoppers 221 allows for the simultaneous storage of different types or batches of feed. Controlled by the hopper valve component 222, the feeding hopper 221 can be flexibly selected, enabling diverse feeding combinations. When feeding is required, the hopper valve component 222 opens, and the feed enters the mixing mechanism 230 through the discharge port for uniform mixing.

[0192] Specifically, the base 210 has multiple discharge holes adapted to the storage hopper 221, and the storage hopper 221 of the feeding mechanism 220 and the conical discharge hopper 231 of the mixing mechanism 230 are connected through the discharge holes.

[0193] In this embodiment, the hopper valve component 222 is a device for controlling the opening and closing of the discharge port of the storage hopper 221. Specifically, the hopper valve component 222 adopts an electric rotary valve with a variable frequency speed-regulating motor. Also known as a rotary feed valve, it rotates a valve core 2221 within the housing through the transmission of a variable frequency adjustable motor and a reducer.

[0194] In practical implementation, the mixing mechanism 230 is integrated into the feeding device 200. Utilizing the design of the conical feeding hopper 231 and two stirring components 232, the mixing effect of the materials can be effectively improved. The stirring shaft 2321, stirring impeller 2322, and spiral blades 2323 of the stirring component 232 work together to ensure that the materials are fully stirred during the feeding process, thereby improving the uniformity of mixing.

[0195] Specifically, the hybrid mechanism 230 in this embodiment includes:

[0196] The conical feeding hopper 231 is fixedly installed on the lower surface of the base 210 by a lifting device. The upper end of the conical feeding hopper 231 is connected to the feeding hole on the base 210 and is used to receive feed falling from the storage hopper 221.

[0197] Two stirring components 232 are connected to a conical hopper 231 and are symmetrically distributed on the outer wall of the conical hopper 231. Each stirring component 232 has a stirring element located within the inner cavity of the conical hopper 231. The two stirring components 232 are symmetrically connected to the outer wall of the conical hopper 231 and are symmetrically distributed. This symmetrical design helps to achieve a uniform mixing effect.

[0198] The mixing component includes a mixing shaft 2321, a mixing impeller 2322, and a helical blade 2323. The helical blade 2323 is fixedly connected to a section of the mixing shaft 2321, and the mixing impeller 2322 is fixedly connected to the end of the mixing shaft 2321. It can be understood that each mixing component 232 includes a mixing shaft 2321, a mixing impeller 2322, and a helical blade 2323. The helical blade 2323 is fixedly connected to a section of the mixing shaft 2321 and is used to propel the material along the axial and radial directions during the mixing process. The mixing impeller 2322 is fixedly connected to the end of the mixing shaft 2321 and is used for further mixing and blending the materials.

[0199] In practical implementation, the outer wall of the conical hopper 231 is provided with a mounting flange, and the stirring component 232 has a geared motor. The geared motor is bolted to the mounting flange, and the geared motor drives the stirring shaft 2321 to rotate. The mounting flange on the outer wall of the conical hopper 231 is used to fix the geared motor of the stirring component 232. The mounting flange is fixed to the outer wall of the hopper by welding or bolting to ensure its structural stability.

[0200] The spiral blades 2323 are fixed to the shaft section of the mixing shaft 2321 and are mainly used to propel the material to move axially and radially, forming complex convection. The mixing impeller 2322 is fixed to the end of the mixing shaft 2321 and is used to further mix and blend the materials to ensure the uniformity of the feed.

[0201] In practice, the outer diameter of the helical blade 2323 is set larger than that of the mixing impeller 2322. This design effectively improves the mixing efficiency and uniformity of the feed mixing mechanism 230. The larger outer diameter of the helical blade 2323 allows for more effective material propulsion, and its design effectively reduces material accumulation and blockage within the conical hopper 231, thus improving the operational stability of the equipment.

[0202] In practical implementation, a discharge valve is provided at the bottom of the conical hopper 231, which is used to open and close the discharge port of the conical hopper 231. This design further optimizes the control function of the feed discharging device 200, ensuring that the mixed feed can be discharged as needed. By controlling the opening and closing of the discharge valve, the feed can be discharged as needed, and the mixed raw materials can be transported to the mixing device 300 for further mixing by gravity.

[0203] In specific implementation, such as Figure 7 As shown, the spiral blade 2323 includes a sleeve, blades and multiple connecting rods; the sleeve is fixedly sleeved on the stirring shaft 2321, and the multiple connecting rods connect the sleeve and the blades respectively, with the multiple connecting rods distributed in a spiral pattern on the outer peripheral wall of the sleeve.

[0204] In practical implementation, the sleeve is fixedly fitted onto the stirring shaft 2321, serving as both support and connection. The sleeve is securely fixed to the stirring shaft 2321 by welding, ensuring it will not loosen during stirring. The blades are the main working part of the helical blades 2323, used to propel materials along the axial and radial directions. The shape and size of the blades are designed according to the stirring requirements, typically in a spiral or twisted shape to achieve optimal stirring effect. Multiple connecting rods connect the sleeve and the blades, firmly fixing the blades to the sleeve. The connecting rods are spirally spaced on the outer peripheral wall of the sleeve; this design not only enhances the structural stability of the blades but also optimizes the material flow path during stirring. This design allows the helical blades 2323 to stably propel materials during stirring, reducing the risk of vibration and loosening.

[0205] Example 3

[0206] Based on the feed production line of Embodiment 1 / Embodiment 2, this third embodiment provides a specific implementation of the screening device 400. This third embodiment provides a detailed description of the specific structure and shape of the screening device 400.

[0207] like Figure 9 , Figure 10 and Figure 11As shown, the screening and collection device is used to screen feed, separating powdered feed that does not meet the requirements for particle size. Specifically, the screening and collection device includes a base 410, a screening hopper 430, and a vibrating motor 440. The base 410 is provided with a discharge channel and has multiple connecting parts 420. The screening hopper 430 is connected to the multiple connecting parts 420 and is suspended at the bottom of the base 410 at intervals through the multiple connecting parts 420. The screening hopper 430 communicates with the discharge channel. The vibrating motor 440 is connected to the outer peripheral wall of the screening hopper 430. The inner cavity of the screening hopper 430 is provided with a material distribution plate 431 and a screen 432; the outer peripheral wall of the material distribution plate 431 is spaced apart from the inner cavity wall of the screening hopper 430, forming a discharge channel; the screen 432 is located below the material distribution plate 431, and the outer peripheral wall of the screen 432 is connected to the inner cavity wall of the screening hopper 430.

[0208] The screening device 400 of this invention is used for screening feed. Its design achieves efficient feed screening and collection functions through the coordinated operation of the base 410, the screening hopper 430, and the vibrating motor 440. The product is installed by hoisting, and is hoisted onto a corresponding carrier (such as a steel structure frame) via the base 410 to receive raw materials from other process equipment (such as feed mixing equipment) in the feed production line.

[0209] like Figure 11 As shown, in the specific implementation, the substrate 410 is a hollow tubular structure, and a cover plate is bolted to the upper end of the substrate 410. The cover plate is provided with a feed inlet. The design of the substrate 410 as a hollow tubular structure forms a vertical feeding channel inside, making full use of the internal space of the substrate 410 and providing a direct feeding channel for feed raw materials. The bolted cover plate ensures the sealing of the top of the substrate 410. The feed inlet is the entrance for feed raw materials to enter the screening device 400 and is connected to the mixing device 300. Its position and size can be adjusted according to actual needs to accommodate different flow rates of feed raw materials. The bolted cover plate is easy to disassemble and install, facilitating cleaning and maintenance of the entire screening device 400.

[0210] In a preferred embodiment, such as Figure 10 As shown, the inner cavity of the substrate 410 is provided with a material discharge plate 411, which has a funnel-shaped structure, and the bottom through hole of the material discharge plate 411 is set directly opposite the material distribution plate 431.

[0211] In practical implementation, the feed tray 411 is made of stainless steel. Its funnel shape effectively guides the feed material's descent, allowing it to fall along the inclined wall of the funnel under gravity and through the bottom through-hole, reducing feed accumulation during the dropping process. The bottom through-hole of the feed tray 411 is aligned with the distribution tray 431, ensuring precise feed distribution. The distribution tray 431 further disperses the feed, ensuring even distribution on the screen 432, thereby improving screening efficiency. This design effectively solves the problem of feed accumulation in the middle of the screen 432.

[0212] In this embodiment, the sieve hopper 430 is the core component for screening feed, and it contains a feed distribution plate 431 and a screen 432. The outer peripheral wall of the feed distribution plate 431 is spaced apart from the inner cavity wall of the sieve hopper 430, forming a feed channel for dispersing the feed and ensuring it falls evenly onto the screen 432. The screen 432 is located below the feed distribution plate 431, and its outer peripheral wall is tightly connected to the inner cavity wall of the sieve hopper 430 for screening the feed. The sieve hopper 430 is the main body of the screening device 400, and its internal structure includes the feed distribution plate 431 and the screen 432. A certain distance is maintained between the outer peripheral wall of the feed distribution plate 431 and the inner cavity wall of the sieve hopper 430, forming an annular feed channel. This design allows the feed to fall evenly along the feed channel after entering the sieve hopper 430, avoiding concentrated accumulation. Screen 432 is located below the feed tray 431, and its outer peripheral wall is tightly connected to the inner cavity wall of the screening hopper 430, forming a complete screening surface. The aperture size of screen 432 is designed according to the feed particle requirements to screen out feed particles that meet the requirements. Screen 432 is usually made of stainless steel or other wear-resistant materials to ensure its durability and screening efficiency.

[0213] On the other hand, it is understandable that the vibrating motor 440 is connected to the outer peripheral wall of the sieve hopper 430. Through vibration, it causes the feed to shake within the sieve hopper 430, accelerating the screening process of the feed through the screen 432, thus better meeting the processing needs of powdered feed. The frequency and amplitude of the vibrating motor 440 can be adjusted according to the characteristics of the feed to achieve the best screening effect.

[0214] In practice, the screening hopper 430 is a conical hopper made of stainless steel, with the top of the screening hopper 430 open and connected to the bottom of the base 410.

[0215] In specific implementation, the material distribution tray 431 is a conical hopper with a smooth outer circumference, and the apex of the material distribution tray 431 is set towards the base 410. The screen 432 is in the shape of a conical hopper, and the apex of the screen 432 is set opposite to the apex of the material distribution tray 431.

[0216] The feed tray 431 is a conical hopper with a smooth outer circumference, and the apex of the cone faces the base 410. Under the action of gravity, feed ingredients fall from the feed tray 411 of the base 410 into the outer wall of the feed tray 431 and disperse along the smooth outer circumference. The conical structure of the feed tray 431 can effectively guide the distribution of feed, allowing it to slide down the inclined surface under the action of gravity and finally fall onto the screen 432.

[0217] The conical structures of the feed tray 431 and the screen 432 work together to form a highly efficient screening system. The smooth outer circumference and conical structure of the feed tray 431 distribute the feed ingredients onto the screen 432, while the conical structure of the screen 432 guides the feed ingredients through the screen holes quickly, effectively improving screening efficiency.

[0218] In specific implementation, regarding the installation method of the bulk material tray 431, a crossbar is welded to the inner cavity of the screening hopper 430, and the bulk material tray 431 is installed on the crossbar; the upper surface of the crossbar has a chamfered structure. A crossbar is welded into the conical inner cavity of the bulk material tray 431 to support and weld the tray 431. This welding method ensures the stability of the bulk material tray 431 during vibration screening, while avoiding loosening due to frequent vibration. The upper surface of the crossbar is designed with a chamfered structure to prevent powder from accumulating on the crossbar. In a preferred embodiment, the crossbar is cross-shaped for better fixation of the bulk material tray.

[0219] like Figure 11 As shown, in one specific embodiment, to facilitate the implementation of the vibratory motor 440, the connecting component 420 includes a stud 421, a first rubber spring 422, and a second rubber spring 423. The outer peripheral wall of the base 410 has a first flange, and the outer peripheral wall of the screen hopper 430 has a second flange. The stud 421 passes through the first and second flanges. The first rubber spring 422 is sleeved on the stud 421 and is located on the upper surface of the first flange. The second rubber spring 423 is sleeved on the stud 421 and is located on the lower surface of the second flange.

[0220] The stud 421 is threaded with multiple nuts, which lock the first rubber spring 422 and the first flange together, and also lock the second rubber spring 423 and the second flange together.

[0221] In practical implementation, to meet the operational requirements of the vibrating motor 440 and ensure the stability and reliability of the screening device 400, the connecting component 420 adopts a combination structure of flange, stud 421, rubber spring, and nut. This design not only effectively fixes the screen hopper 430 but also buffers vibration through the rubber spring, reducing equipment wear and noise.

[0222] Specifically, the first rubber spring 422 is sleeved on the stud 421 and located on the upper surface of the first flange. Its function is to buffer the high-frequency vibration generated by the vibration motor 440, reducing the direct impact of vibration on the base 410 and the screen hopper 430, thereby extending the service life of the equipment. The second rubber spring 423 is sleeved on the stud 421 and located on the lower surface of the second flange. Working in conjunction with the first rubber spring 422, it further buffers vibration and reduces the transmission of vibration to the base 410, ensuring the stability of the screening process.

[0223] It should be noted that the outer peripheral wall of the base 410 is provided with a first flange, and the outer peripheral wall of the screening hopper 430 is provided with a second flange. A stud 421 passes through both the first and second flanges to fix the screening hopper 430 to the base 410. This flange connection method provides stable support while facilitating installation and disassembly. Multiple nuts are threaded onto the stud 421, which lock the first rubber spring 422 and the first flange, and also lock the second rubber spring 423 and the second flange. This design ensures a secure connection and absorbs vibration energy through the elastic deformation of the rubber springs, reducing equipment noise and vibration. The rubber springs have good elasticity and damping characteristics, effectively absorbing vibration energy. When the vibration motor 440 operates, the generated vibration is transmitted to the rubber springs through the stud 421. The rubber springs buffer the vibration through elastic deformation, reducing the direct impact of vibration on the equipment.

[0224] In this embodiment, in order to further improve the vibration isolation performance and structural stability of the screening device 400 during the vibrating screening process, both the first rubber spring 422 and the second rubber spring 423 adopt a composite rubber spring structure, which includes a rubber elastic body and several embedded metal collars.

[0225] Specifically, the rubber elastic body is a hollow cylindrical structure, with its axial direction along the stud 421. A through-hole is provided inside the rubber elastic body for fitting onto the outer periphery of the stud 421. Unlike traditional solid structures, the outer surface of the rubber elastic body in this embodiment has a corrugated or drum-shaped profile, giving the rubber spring greater radial deformation capacity during compression, thereby improving its ability to absorb lateral vibration components and achieving combined isolation of axial and radial vibrations.

[0226] Furthermore, a matching metal collar is fitted onto the outer wall of the corrugated or drum-shaped contour structure of the rubber elastic body. The metal collar is segmented along the axial direction and corresponds to each crest or drum-shaped protrusion. By setting the metal collar, on the one hand, the radial deformation of the rubber elastic body can be limited and constrained to prevent excessive expansion or structural instability under large amplitude conditions; on the other hand, a composite load-bearing structure is formed between the metal collar and the rubber body. Under small amplitude vibration conditions, the rubber body provides low-stiffness vibration isolation performance, while under large amplitude or high load conditions, the constraint effect of the metal collar improves the overall structural stiffness, thereby forming a nonlinear vibration isolation structure with segmented stiffness characteristics.

[0227] For example, the corrugated profile structure extends continuously along the axial direction (i.e., the length direction of the rubber elastic body) of the rubber elastic body, and the whole is periodically undulating. Its undulation trajectory is a smooth arc, which prevents stress concentration from causing damage to the rubber elastic body during stress or deformation. The corrugated profile structure and the rubber elastic body are integrally vulcanized.

[0228] In another example, the drum-shaped profile structure is a symmetrical drum-shaped protrusion with a thicker middle and thinner ends on the outer peripheral surface of the rubber elastic body along the axial direction. The overall profile is a smooth arc transition and is integrally vulcanized with the rubber elastic body to ensure structural integrity and elastic performance.

[0229] Preferably, the metal collar and the rubber elastic body are fixedly connected by an interference fit or vulcanization molding to improve the bonding strength between them and prevent relative slippage or detachment during long-term vibration. For example, a rubber compound is placed in a pre-made mold and vulcanized with the metal collar. After cooling and demolding, a composite structure of the rubber elastic body and metal collar of the composite rubber spring is obtained. Through the above structural design, the composite rubber spring in this embodiment not only has good elastic deformation capability but also can achieve adaptive stiffness adjustment under different vibration conditions, thereby effectively suppressing the transmission of vibration generated by the vibration motor 440 to the base 410, while ensuring stable support of the screening hopper 430, significantly improving the operational stability and service life of the screening device 400.

[0230] In terms of materials, the rubber elastic body is preferably made of a composite rubber material with excellent fatigue resistance. It is modified by combining natural rubber (NR) and nitrile rubber (NBR) as base materials, taking into account both the elastic deformation capacity and environmental aging resistance of the rubber material, and adapting to the long-term high-frequency vibration requirements of the screening device 400. The specific formula components and dosages are as follows: 45 parts of natural rubber, 40 parts of nitrile rubber, 45 parts of carbon black N330, 7 parts of dioctyl phthalate (DOP), 1.2 parts of antioxidant TMQ (RD), 1.0 part of modified silane coupling agent KH-570, 2.0 parts of sulfur, 1.0 part of vulcanization accelerator CZ (CBS), 4.5 parts of zinc oxide (ZnO), and 1.5 parts of stearic acid (SA).

[0231] The components of the aforementioned composite rubber material work synergistically. Natural rubber (NR) provides the rubber elastic matrix with excellent elasticity, tensile strength, and fatigue resistance, ensuring that the rubber spring is not prone to fatigue cracking during long-term high-frequency compression and rebound. The addition of nitrile rubber (NBR) can significantly improve the aging resistance of the rubber material and extend its service life. Carbon black N330, as a reinforcing filler, can effectively enhance the tensile strength, tear strength, and abrasion resistance of the rubber material, reduce the permanent compression deformation of the rubber elastic matrix during vibration, and ensure the stability of vibration isolation performance.

[0232] Furthermore, the plasticizer DOP improves the processing fluidity of rubber materials, enabling the rubber elastic matrix to be smoothly molded into corrugated or drum-shaped contour structures, while reducing the hardness of the rubber compound and enhancing the flexibility and radial deformation capacity of the rubber matrix, thus meeting the absorption requirements of lateral vibration components. The antioxidant TMQ inhibits the thermo-oxidative aging of rubber materials during long-term use, preventing cracking, hardening, and brittleness, further improving the fatigue resistance of the material. The modified silane coupling agent KH-570 improves the interfacial bonding force between carbon black and the rubber matrix, enhancing the reinforcing effect, while also improving the interfacial adhesion between the rubber elastic matrix and the metal collar. The vulcanization system (sulfur, vulcanization accelerator CZ, vulcanization activator zinc oxide, and stearic acid) allows for sufficient cross-linking reactions of rubber molecules, forming a stable three-dimensional network structure, giving the rubber elastic matrix good structural stability and elastic recovery ability, meeting the load requirements of the 400 screening device.

[0233] In a preferred embodiment, the screening device 400 further includes a corrugated rubber sleeve 450. The upper end of the corrugated rubber sleeve 450 is fitted onto the base 410 and locked with a clamp; the lower end of the corrugated rubber sleeve 450 is fitted onto the conical hopper and locked with a clamp. The corrugated rubber sleeve 450 is an elastic, stretchable rubber pipe, widely used in applications requiring flexible connections and vibration damping. In the screening device 400, the main function of the corrugated rubber sleeve 450 is to connect the base 410 and the screening hopper 430, providing a flexible connection and reducing the direct impact of vibration on the equipment, especially the base 410, reducing the transmission of vibration from the screening hopper 430 to the base 410. The corrugated rubber sleeve 450 effectively seals the connection points, preventing feed leakage and maintaining the cleanliness of the equipment's interior.

[0234] In a preferred embodiment, the screening device 400 further includes a screw conveyor 460, the feed end of which is connected to the bottom of the conical hopper. The introduction of the screw conveyor 460 into the screening device 400, with its feed end connected to the bottom of the conical hopper, achieves an integrated design of screening and conveying.

[0235] In a preferred embodiment, the conical hopper can be connected to the screw conveyor 460 using multiple identical connecting parts 420, allowing the conical hopper and screw conveyor 460 to be fixedly installed, and then flexibly connected by a corrugated rubber sleeve 450. The purpose of the screw conveyor 460 is to transport the screened feed to the feed discharge device.

[0236] The screening device 400 described in this embodiment has been specifically optimized in terms of structural design and functional coordination compared to conventional vibrating screening equipment in the prior art. Specifically, existing screening equipment usually adopts a single screen structure, with materials falling from top to bottom into the central area of ​​the screen, which easily leads to material accumulation, uneven screening, and reduced screening efficiency. Especially in the screening process of powder or fine particle feed, problems such as clogging and incomplete screening are prone to occur, thereby affecting the capacity of the entire production line.

[0237] To address the aforementioned technical problems, this embodiment provides a material distribution plate 431 within the screening hopper 430, and constructs the material distribution plate 431 and the screen 432 into a mutually cooperating conical structure. This allows the material, upon entering the screening hopper 430, to be first guided by the discharge plate 411 and precisely fall onto the outer circumference of the material distribution plate 431. Under the influence of gravity and structural guidance, the material is evenly dispersed along the outer circumference of the material distribution plate 431, and then evenly distributed to the screening area of ​​the screen 432 through the annular discharge channel formed between the material distribution plate 431 and the inner wall of the screening hopper 430. This effectively avoids the problem of material accumulating in localized areas of the screen. Furthermore, the screen 432 adopts a conical structure with the opposite cone direction to the material distribution plate 431, giving the material a dual tendency of radial dispersion and axial flow during the screening process. This significantly increases the probability of material passing through the screen openings, thereby improving screening efficiency and reducing the risk of clogging.

[0238] Furthermore, this embodiment constructs a vibration transmission structure with elastic buffering function by setting a vibration motor 440 on the outer periphery of the screen hopper 430 and combining it with the connecting component 420 (including studs 421 and rubber springs arranged on both sides) set between the base 410 and the screen hopper 430. On the one hand, the vibration motor 440 provides a stable excitation force, causing the material to continuously tumble and disperse on the surface of the screen 432; on the other hand, the rubber springs isolate and buffer the vibration, effectively reducing the transmission of vibration to the base 410 and upstream equipment, reducing structural fatigue and noise, and improving the overall operational stability of the machine.

[0239] Furthermore, by setting a corrugated rubber sleeve 450 to achieve a flexible sealing connection between the base 410 and the screen hopper 430, it can not only adapt to the relative displacement generated during vibration and prevent material leakage, but also further weaken the vibration transmission path, achieving synergistic optimization of sealing and vibration reduction. At the same time, the bottom of the screening device 400 integrates a screw conveyor 460 to achieve integrated connection between screening and conveying, reduce intermediate transfer links, and improve the continuity and automation of the production line.

[0240] In summary, this embodiment, through the synergistic structural design of the bulk material tray and the conical screen, the combined application of vibrating screening and elastic vibration isolation structure, and the integrated flexible sealing and conveying, not only effectively solves the problems of uneven material distribution, low screening efficiency, and large vibration transmission in the prior art, but also significantly improves screening efficiency, equipment stability, and system integration, demonstrating outstanding substantive features and significant progress.

[0241] Example 4

[0242] Based on the feed production line of Embodiment 1, Embodiment 2, and Embodiment 3, this fourth embodiment provides a specific implementation of the screening device 400. This fourth embodiment provides a detailed description of the specific structure and shape of the feed discharge device.

[0243] like Figure 12 , Figure 13 and Figure 14 As shown, the feed discharging device includes a main body and a clamp 530. The main function of the feed discharging device is to receive feed from the feed production line, specifically feed falling from the screw conveyor 460 of the screening device 400, and to bag and package the feed. The main body receives the feed, and the clamp 530 on the main body clamps the packaging bag 600 onto the feed hopper 523 of the main body for feeding.

[0244] In one specific embodiment, the main body of the device includes a frame 510 and a housing 520, with the housing 520 fixedly connected to the top of the frame 510. A feed pipe 521 is provided at the upper end of the housing 520, and a hopper 523 is fixedly connected to the lower end of the housing 520. The hopper 523 and the feed pipe 521 are horizontally offset from each other. A feed conveyor 522 is installed inside the housing 520, which conveys the feed falling through the feed pipe 521 to the hopper 523.

[0245] The frame 510 serves as the supporting structure for the entire device, ensuring its stability and robustness. The housing 520 is fixedly connected to the top of the frame 510, with a feed pipe 521 at its upper end for receiving feed from the feed production line. The hopper 523 is fixedly connected to the lower end of the housing 520, guiding the feed into the packaging bags. The feed pipe 521 and hopper 523 are horizontally staggered, optimizing the feed delivery path and preventing potential accumulation or blockage when feed falls directly from the feed pipe 521 into the hopper 523. A feed conveyor 522 is housed within the housing 520. This feed conveyor 522 is the core component of the device, its function being to smoothly and efficiently transport the feed falling through the feed pipe 521 to the hopper 523, ensuring the feed can smoothly enter the packaging bags for bagging.

[0246] The core technology of the device lies in the receiving, conveying, and guiding of feed. Feed enters the casing 520 from the production line through the feed pipe 521. Because the feed pipe 521 and the discharge hopper 523 are horizontally offset, the feed does not fall directly into the discharge hopper 523 but first onto the feed conveyor 522. The feed conveyor 522 uses a mechanical transmission device (such as a motor-driven conveyor belt or screw conveyor) to transport the feed from below the feed pipe 521 to the discharge hopper 523, thus achieving a smooth transition and uniform feeding. This design effectively avoids problems such as feed accumulation, blockage, or uneven feeding during the feeding process, ensuring that the feed smoothly and stably enters the discharge hopper 523 and flows into the packaging bag, improving the efficiency and reliability of the entire feed bagging process.

[0247] In a preferred embodiment, a collection hopper 524 is also provided at the lower end of the housing 520. The collection hopper 524 is located below the feed conveyor 522, and is vertically aligned with the feed inlet pipe 521. The collection hopper 524 is an important component at the lower end of the housing 520, mainly used to collect feed that falls extra from the feed conveyor 522, preventing feed waste and pollution of the surrounding environment.

[0248] In a specific implementation, such as Figure 4As shown, the feed discharging device also includes a bag conveyor, which is located directly below the feed hopper 523. Limit rails are installed on both sides of the bag conveyor. The bag conveyor is an important component of the feed discharging device, transporting the bags filled with feed to the next process after bagging is completed. The bag conveyor uses a common belt conveyor. To prevent the bags from shifting or tipping during transport, limit rails are installed on both sides of the conveyor. The height of the limit rails is adjusted according to the height of the bags to ensure the bags remain stable during transport. The rails can be fixed or adjustable to accommodate bags of different sizes.

[0249] In this embodiment, the collecting hopper 524 is typically designed as an inverted funnel or square trough with a larger opening at the top to facilitate the collection of feed falling from the feed conveyor 522; and a smaller opening at the bottom to redirect the collected feed back to the feed inlet pipe 521 or a designated location. Its dimensions are optimized based on the size of the feed conveyor 522 and the feed drop range to ensure effective collection of the dropped feed.

[0250] In practice, the collecting hopper 524 uses the same material as the discharging hopper 523, such as stainless steel or aluminum alloy, which features high strength, corrosion resistance, and easy cleaning. Its smooth surface facilitates feed slippage while preventing feed residue and bacterial growth.

[0251] In this embodiment, the feeding hopper 523 is divided into an upper section and a lower section. The upper section of the feeding hopper 523 has a rectangular structure and is fixedly connected to the housing 520. The feeding hopper 523 is typically funnel-shaped or conical, with a larger opening at the upper end to facilitate receiving feed conveyed from the main body of the device, and a smaller opening at the lower end to facilitate the concentrated entry of feed into the packaging bag. The inner wall of the feeding hopper 523 is designed as a smooth inclined surface, allowing the feed to smoothly slide into the packaging bag after falling from the feed conveyor 522. The angle of the inclined surface is optimized according to the flowability of the feed to ensure that the feed does not stagnate in the feeding hopper 523.

[0252] Specifically, the upper section of the hopper 523 is used to install the clamp 530. The connector of the clamp 530 is fixedly connected to the outer wall of the upper section of the hopper 523. The clamp 530 securely clamps the packaging bag on the hopper 523 through the clamping member 5324.

[0253] During operation, the drive unit 531 drives the two clamping components 532 to move closer to each other via mechanical or hydraulic means. The two clamping components 5324 together clamp the packaging bag onto the feed dispensing device. With the combined action of the flexible steel belt and rubber pad, and the friction of the rubber pad, the clamp 530 firmly secures the packaging bag, ensuring that the feed does not leak during bagging. After bagging is complete, the drive unit 531 drives the clamping components 532 to separate, releasing the packaging bag.

[0254] In practice, the outer contour of the clamping member 5324 is arc-shaped, and the two ends of the clamping member 5324 are fixedly connected to the clamping component 532. The outer contour of the clamping member 5324 is designed to be arc-shaped, which better fits the surface shape of the packaging bag.

[0255] In specific implementation, such as Figure 2 As shown, the clamping component 532 includes:

[0256] Two swing arms 5321 are arranged in a mirror-symmetrical configuration, each hinged to a connecting member. A drive component 531 connects the two swing arms 5321. This symmetrical design ensures the balance and consistency of the clamping action. The swing arms 5321 are the main moving parts of the clamping component 532. Driven by the drive component 531, the swing arms 5321 can swing around the hinge point, thereby driving the clamping component 5324 to perform clamping or releasing actions.

[0257] A fixed shaft 5322 is provided, with two swing arms 5321 fixedly connected to its two ends. The shaft body of the fixed shaft 5322 is connected to the upper end of a clamping arm 5323. The function of the fixed shaft 5322 is to transmit the movement of the swing arms 5321 to the clamping arms 5323, ensuring that the clamping arms 5323 move synchronously, thereby achieving the clamping or releasing of the clamping member 5324.

[0258] Two clamping arms 5323 are arranged in a mirror-symmetrical configuration. The upper ends of the two clamping arms 5323 are fixedly connected to the shaft of the fixed shaft 5322, and the lower ends of the two clamping arms 5323 are respectively fixed to the two ends of the clamping member 5324. The clamping arms 5323 are the actuating components of the clamping member 5322. Driven by the swing arm 5321 and the fixed shaft 5322, the clamping arms 5323 can drive the clamping member 5324 to perform clamping or releasing actions.

[0259] In practice, the swing arm 5321, the fixed shaft 5322, and the clamping arm 5323 are all fixed together by welding.

[0260] In practice, a clamping block is bolted to the lower end of the clamping arm 5323, and the clamping block and clamping arm 5323 securely hold the clamping member 5324. A stud 421 passes through the lower end of the clamping block, clamping member 5324, and clamping arm 5323, and is then locked with a nut. This provides a reliable fastening method and facilitates the replacement of the clamping member 5324.

[0261] like Figure 2As shown, there are two drive components 531, each including a cylinder 5311, a hinge seat 5312, and a double elbow joint 5313. The hinge seat 5312 is bolted to the cylinder body of the cylinder 5311 and is hinged to the swing arm 5321 of one side of the clamping component 532. The double elbow joint 5313 is threaded to the rod end of the cylinder 5311 and is hinged to the swing arm 5321 of the other side of the clamping component 532, which is mirror-symmetrical to it.

[0262] The design of the drive component 531 further optimizes the clamping action and control precision of the clamp 530. By employing two drive components 531 (one for each clamping component 532), combined with the structure of cylinder 5311, hinge seat 5312, and double elbow joint 5313, the clamp 530 can achieve more precise and stable clamping operation. The double elbow joint 5313 is used to connect the piston rod of cylinder 5311 to the swing arm 5321 of the other clamping component 532. It is threaded to the rod end of cylinder 5311, enabling the extension and retraction action of cylinder 5311 to be transmitted to the swing arm 5321 on the other side, achieving synchronous movement of the clamping components 532 on both sides. The double elbow joint 5313 is threaded to the rod end of cylinder 5311 and hinged to the swing arm 5321 of the mirror-symmetrical clamping component 532 on the other side. This design ensures that the clamping components 532 on both sides can move synchronously during clamping, and the clamping force is evenly distributed.

[0263] Specifically, the clamping action is achieved as follows: When the piston rod of cylinder 5311 extends, the two swing arms 5321 simultaneously swing outward through the transmission of the hinge seat 5312 and the double elbow joint 5313, causing the clamping arms 5323 and the clamping components 5324 to release the packaging bag. When the piston rod of cylinder 5311 retracts, the two swing arms 5321 swing inward, and the clamping arms 5323 and the clamping components 5324 clamp the packaging bag, completing the clamping action.

[0264] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, it will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feed production line, characterized in that, include: A steel frame, on which a feeding device, a mixing device, a screening device and a feed discharging device are arranged sequentially from top to bottom; The feeding device has a feeding mechanism with multiple storage hoppers, each of which is equipped with a weighing sensor and a hopper valve component; A mixing device, wherein the inlet of the mixing device is connected to the hopper valve component of the discharging device; A screening device, wherein the inlet of the screening device is connected to the mixing device; A feed discharging device, wherein the feed inlet of the feed discharging device is connected to the screening device; A control system is connected to a feeding device, a mixing device, a screening device, and a feed discharging device. The control system is configured to execute a control method for controlling the hopper valve components, the control method comprising the following steps: The feeding parameters of the input control system are obtained, including the target total feeding value for each storage hopper; Obtain the initial weight G of the storage hopper collected by the weighing sensor. 初 ; Obtain the real-time weight G of the storage hopper by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 ; The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge.

2. The feed production line as described in claim 1, characterized in that, The screening device includes: The substrate is provided with a feeding channel and has multiple connecting components; The sieve hopper is connected to multiple connecting components. The sieve hopper is suspended at intervals at the bottom of the base through the multiple connecting components. The sieve hopper is connected to the discharge channel. A vibrating motor, which is connected to the outer peripheral wall of the screen hopper; The inner cavity of the sieve hopper is provided with a material distribution plate and a screen; the outer peripheral wall of the material distribution plate is spaced apart from the inner cavity wall of the sieve hopper, forming a material discharge channel; the screen is located below the material distribution plate, and the outer peripheral wall of the screen is connected to the inner cavity wall of the sieve hopper.

3. A feed production line as described in claim 2, characterized in that: The substrate is designed as a hollow tubular structure, and the inner cavity of the substrate is provided with a material discharge plate. The material discharge plate has a funnel-shaped structure, and the bottom through hole of the material discharge plate is set directly opposite the material distribution plate. The material distribution tray is a cone-shaped hopper with a smooth outer circumference, and the cone apex of the material distribution tray faces the base; the screen is also cone-shaped, and the cone apex of the screen faces the opposite direction to the cone apex of the material distribution tray.

4. A feed production line as described in claim 2, characterized in that: The connecting component includes a stud, a first rubber spring, and a second rubber spring; The outer peripheral wall of the substrate has a first flange, the outer peripheral wall of the sieve hopper has a second flange, and the stud passes through the first flange and the second flange; The first rubber spring is sleeved on the stud and is disposed on the upper surface of the first flange; the second rubber spring is sleeved on the stud and is disposed on the lower surface of the second flange. The stud is threaded with multiple nuts, which lock the first rubber spring and the first flange together, and also lock the second rubber spring and the second flange together.

5. A feed production line as described in claim 4, characterized in that: Both the first and second rubber springs adopt a composite rubber spring structure, which includes a rubber elastic body and several metal collars attached to the outer peripheral wall of the rubber elastic body. A through-hole is provided inside the rubber elastic body for fitting onto the outer periphery of the stud; the outer peripheral surface of the rubber elastic body is configured as a corrugated or drum-shaped profile structure, and the metal collar is disposed on the outer peripheral wall of the corrugated or drum-shaped profile structure of the rubber elastic body.

6. A feed production line as described in any one of claims 1 to 5, characterized in that: The feeding device includes a base, a feeding mechanism, and a mixing mechanism. The feeding mechanism is disposed on the upper surface of the base, and the mixing mechanism is disposed on the lower surface of the base. The feeding mechanism is connected to the conical feeding hopper of the mixing mechanism. The feeding mechanism includes multiple storage hoppers arranged adjacent to each other; each storage hopper is equipped with a hopper valve component, which is mounted on a base; The steel frame includes a support mounted on a base. The storage hopper has two symmetrically distributed weighing sensors, which are deployed on the support of the steel frame. The outer wall of the storage hopper is provided with two hanging ears, which are used to mount the weighing sensors.

7. The control system for a feed production line as described in claim 6, characterized in that: The control system includes a main controller, a fuzzy PID controller, and a frequency converter connected in sequence; the hopper valve component is an electric rotary valve with a variable frequency speed control motor, and the frequency converter is connected to the electric rotary valve; The main controller is configured to execute the following control method for controlling the hopper valve components.

8. The control method for a feed production line as described in claim 7, characterized in that, Includes the following steps: The feeding parameters of the input control system are obtained, including the target total feeding value for each storage hopper; Obtain the initial weight G of the storage hopper collected by the weighing sensor. 初 ; Obtain the real-time weight G of the storage hopper by the weighing sensor. 实 Calculate the real-time feeding value, where the real-time feeding value = initial weight G. 初 – Real-time weight (G) 实 ; The opening and closing degree of the hopper valve components is controlled according to the percentage of material discharge and the preset control strategy; the percentage of material discharge = real-time material discharge / target total material discharge. The preset control strategy includes: When the percentage of the material feed is less than the first threshold, the hopper valve component is controlled to be in the fully open state; When the percentage of the material feeding value is greater than or equal to the first threshold and the percentage of the material feeding value is less than the second threshold, the hopper valve component is controlled to switch from a fully open state to a half open state. When the percentage of material discharge exceeds the second threshold, the fuzzy PID controller is invoked to control the hopper valve component until the percentage of material discharge reaches 100%, at which point the hopper valve component is completely closed.

9. The control method for a feed production line as described in claim 8, characterized in that, The process of invoking the fuzzy PID controller to control the hopper valve component includes the following steps: Get the preset target flow value Q 目标 ; Calculate the actual feed rate Q(t) at time t. The formula for calculating the actual feed rate Q(t) is Q(t) = (G... t前 -G t后 ) / △t, where △t is the material feeding time difference, G t前 G represents the weight of the storage hopper before Δt. t后 The weight of the storage hopper after Δt; Based on the target flow value Q 目标 Calculate the deviation e(t) and the rate of change of the difference de(t) based on the actual material flow rate Q(t), where the rate of change of the deviation de(t) is the rate of change of the deviation e(t) over time. The deviation e(t) and the rate of change of deviation de(t) are input into the fuzzy PID controller, and the fuzzy PID controller outputs the fuzzy control quantity u(t). The hopper valve component is controlled according to the fuzzy control quantity u(t).

10. The control method for a feed production line as described in claim 9, characterized in that: The fuzzy PID controller utilizes an improved genetic algorithm to optimize the fuzzy quantization factor, where the fuzzy quantization factor is K. e(t) K de(t) K kp K ki and K kd Wherein, K e(t) K is the quantization factor for the deviation e(t); de(t) The quantization factor for the rate of change of deviation de(t), the K kp For the proportional parameter K p The quantization factor, the K ki For the integration parameter K i The quantization factor, the K kd For the differential parameter K d Quantification factor; The improved genetic algorithm optimization includes the following steps: Set the fuzzy quantization factor K e(t) K de(t) and K kp The scope of optimization; Using binary encoding, the fuzzy quantization factor K is... e(t) K de(t) K kp K ki and K kd Encode them into binary numbers and form the chromosomes of individuals in the initial population; Construct a fitness function F, and calculate the fitness value of each individual in the initial population based on the fitness function F; the mathematical expression of the fitness function F is: In the formula, For accuracy indicators, For energy consumption and smoothing indicators, For efficiency indicators, Here, k is the weighting coefficient, and k is the scaling factor; Using a roulette wheel strategy and an elite strategy, several random individuals and the optimal solution individual are selected from the initial population, respectively. A new population is generated by crossbreeding and mutating several random individuals and the optimal solution individuals; among them, the mutation operation introduces the mutation probability of powder working conditions. Repeat the above steps to continue iterating on the new population. When the iteration threshold is met, output the optimal solution individual of the last iteration. Decode the individual optimal solution.

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