Frequency conversion control system for feed mill equipment

Abstract

The utility model discloses a feed mill equipment frequency conversion control system which comprises a storage unit, a discharging unit and a processing unit, the storage unit is in flexible connection with the discharging unit, the processing unit comprises processing equipment and a first variable frequency motor, and the discharging unit comprises a conveyor and a second variable frequency motor. The first variable frequency motor and the second variable frequency motor are both controlled by a control cabinet and are both started through star-delta conversion voltage reduction power frequency or frequency conversion of a frequency converter. The variable-frequency starting circuit is additionally arranged in circuits of equipment such as a pulverizer and a granulator which are high in power and need to be started in a step-down mode, the variable-frequency starting circuit is connected with an original star-delta conversion step-down starting circuit, double-system starting of variable-frequency starting and star-delta conversion step-down starting is achieved, and different step-down starting modes can be achieved according to production requirements; and the requirements of different application scenes are met, the feeding amount and the processing power are controlled, particularly, the different crushing finenesses of the same material are regulated and controlled, equipment abrasion can be reduced, and the service life of equipment can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of feed production technology, and in particular to a frequency conversion control system for feed mill equipment. Background Technology

[0002] Feed processing plants frequently use high-powered equipment, which is often the main equipment in the plant. Therefore, the operation of this equipment directly impacts the plant's production efficiency and quality. During long-term operation, we have observed the following issues:

[0003] 1. Due to differences in raw materials and processing methods, feed grinding requirements vary. For example, in pig feed production, the corn particle size used varies depending on the stage of pig feed production; typically, corn in piglet feed requires finer grinding. Other grinding requirements exist, such as corn kernels filtered from other stages, soybeans, rice, and barley, which cannot meet diverse grinding needs.

[0004] 2. Once a malfunction occurs, the equipment will stop operating, affecting production. Furthermore, troubleshooting is complex and time-consuming, impacting normal production.

[0005] Therefore, we propose a frequency conversion control system for feed mill equipment to solve the above problems. Utility Model Content

[0006] This application provides a frequency conversion control system for feed mill equipment, which solves the problems of start-up, energy saving, quality control and service life of high-power equipment in feed mills.

[0007] This application provides a variable frequency control system for feed mill equipment, including a storage unit, a feeding unit, and a processing unit. The processing unit includes processing equipment and a first variable frequency motor. The feeding unit includes a conveyor and a second variable frequency motor. Both the first and second variable frequency motors are controlled by a control cabinet, and both the first and second variable frequency motors are started by star-delta conversion to step-down power frequency or by frequency converter.

[0008] Preferably, the control cabinet includes an adjustment knob, a motor direction switch, a motor start / stop switch, and indicator lights for multi-unit operating equipment. The star-delta conversion step-down power frequency or frequency converter frequency conversion start is controlled by the adjustment knob.

[0009] Preferably, the storage unit and the unloading unit, and the unloading unit and the processing unit are softly connected.

[0010] Preferably, the storage unit includes a feeding hopper, and a weighing sensor is installed at the bottom of the feeding hopper, the weighing sensor being connected via a control cabinet.

[0011] Preferably, the processing equipment is a pulverizer or a granulator.

[0012] Preferably, the conveyor is a screw conveyor.

[0013] Preferably, the weighing sensor, the first variable frequency motor, and the second variable frequency motor are controlled synchronously.

[0014] As can be seen from the above technical solution, this application provides a frequency conversion control system for feed mill equipment. During operation, the required raw materials are delivered to the storage unit. Frequency conversion start control is used initially. During use, the system is switched to frequency conversion start via the control cabinet. After the equipment is running, the second frequency conversion motor controls the conveyor for feeding. During feeding, the operating frequency of the second frequency conversion motor is obtained through the control cabinet, thereby controlling the rotation frequency of the first frequency conversion motor, enabling the two motors to work synchronously. The first frequency conversion motor performs open-loop control based on the operating status of the second frequency conversion motor. In specific applications, the conveyor's conveying capacity and the optimal operating frequency of the processing unit can be adjusted according to different materials, achieving optimal conveying capacity and processing capacity, thus improving processing efficiency and quality. When the system's processing capacity is not at full load, the second variable frequency motor can reduce the conveying capacity, and the corresponding second variable frequency motor will reduce its power synchronously to achieve energy saving. When the variable frequency starting equipment fails, the system can be adjusted to star-delta conversion to reduce the power frequency through the control cabinet, and the equipment can work normally at the normal frequency. Maintenance personnel can repair and replace the variable frequency equipment without affecting normal production.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By setting up storage unit, unloading unit and processing unit, the processing of high-power operating equipment is decomposed into storage, unloading and normal processing. First, it can stabilize the operation of materials and equipment, thereby reducing energy consumption and increasing the service life of motor. Second, it can control the materials to be processed at a set frequency, which can improve product quality and stabilize the operation of the entire system.

[0017] 2. Through open-loop control of the first variable frequency motor and the second variable frequency motor, the first variable frequency motor is a large motor, which follows the smaller second variable frequency motor to control the operating power. This can reduce energy consumption and also allow the first variable frequency motor to change its operating power according to the amount of material, thereby further improving the service life of the motor.

[0018] 3. The installation method of using star-delta conversion to reduce the power frequency or using a frequency converter for starting means that if one of the starting circuits fails, the equipment can be started through the other starting circuit, ensuring the normal operation of the equipment and not negatively affecting normal production, thereby improving production efficiency.

[0019] In summary, this application adds a frequency converter starting circuit to the circuits of high-power equipment such as crushers and granulators that require reduced-voltage starting, and connects it to the original star-delta conversion reduced-voltage starting circuit to achieve dual-system starting of frequency converter starting and star-delta conversion reduced-voltage starting. Different reduced-voltage starting modes can be used according to production needs to ensure the normal operation of the equipment. Furthermore, through dual-motor frequency converter control, the speed of the motor and the driven equipment can be controlled to meet the needs of different application scenarios, control the feeding amount and processing power, and especially the adjustment of different crushing fineness of the same material can reduce equipment wear, extend equipment service life, and improve production efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a frequency conversion control system for feed mill equipment proposed in this utility model;

[0022] Figure 2 This is an enlarged view of section A of the variable frequency control system for feed mill equipment proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the control cabinet structure of a frequency conversion control system for feed mill equipment proposed in this utility model;

[0024] Figure 4 This utility model provides a circuit control diagram for a frequency conversion control system for feed mill equipment.

[0025] Figure 5 This utility model proposes a variable frequency start-up procedure for a variable frequency control system for feed mill equipment.

[0026] Figure 6 This utility model proposes a power frequency start-up procedure for a variable frequency control system for feed mill equipment.

[0027] In the diagram: 1 Processing equipment, 2 First variable frequency motor, 3 Feed hopper, 4 Flexible connection, 5 Conveyor, 6 Second variable frequency motor, 7 Feed pipe, 8 Weighing sensor, 9 Control cabinet, 10 Adjustment knob, 11 Motor direction switch, 12 Motor start / stop switch, 13 Multi-unit operating equipment indicator light. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0029] See Figure 1-6 This application discloses a variable frequency control system for feed mill equipment. It is used for the start-up and control of high-power equipment in feed mill areas to achieve normal start-up, stable operation, reduced energy consumption, and improved quality. Specifically, it includes a material storage unit, a feeding unit, and a processing unit. This application divides the single processing unit into three processing processes: first, material storage; then, stable feeding and stable processing. This can maximize the stability of material processing efficiency, enabling each motor to operate stably in a stable state, reducing energy consumption, and controlling the crushing quality of the material.

[0030] The processing unit includes a processing device 1 and a first variable frequency motor 2. In this application, the processing device 1 is a crusher or granulator. This application is mainly applied to crushers or granulators, which are two high-power operating devices. In this application, both are operated by variable frequency motors. Similarly, the feeding unit includes a conveyor 5 and a second variable frequency motor 6. In this application, the conveyor 5 is a screw conveyor, which can achieve a sealing effect and prevent dust from escaping during the particle or crushing process. The first variable frequency motor 2 and the second variable frequency motor 6 are both controlled by the control cabinet 9. During use, the speed of the motor and the equipment it drives can be controlled to meet the needs of different application scenarios, such as the adjustment of different crushing fineness of the same material, the crushing of different materials, etc. The same set of equipment can meet the production needs of different application scenarios and improve production efficiency.

[0031] Both the first variable frequency motor 2 and the second variable frequency motor 6 are started by star-delta conversion to reduce the power frequency or by frequency converter. This application has two sets of reduced voltage starting systems. When one of the reduced voltage starting systems fails, there is a backup starting system, which will not affect production and ensure the normal operation of production.

[0032] In this utility model, the control cabinet 9 includes an adjustment knob 10, a motor direction switch 11, a motor start / stop switch 12, and indicator lights for multi-unit operating equipment 13. Star-delta conversion step-down power frequency or frequency converter start-up is controlled by the adjustment knob 10. Before equipment operation, such as... Figure 4 The circuit shown first selects the starting mode, and then controls the operation of the running circuit through the control circuit to realize the variable frequency start or power frequency start of the equipment.

[0033] like Figure 4-6 As shown, in specific operations, such as Figure 5 As shown, adjust knob 10 to position 1, then turn on motor start / stop switch 12 to start the inverter. When inverter start is required, as shown... Figure 6As shown, adjust knob 10 to position 2, then turn on motor start / stop switch 12 to start the system at industrial frequency. If any system fails during operation, it can be started through another system to ensure the normal operation of the equipment and reduce the impact of equipment circuit failures on production.

[0034] In this invention, the soft connection 4 between the material storage unit and the unloading unit, and between the unloading unit and the processing unit, can reduce the impact of equipment vibration.

[0035] Furthermore, the storage unit includes a feeding bin 3, and a weighing sensor 8 is installed at the bottom of the feeding bin 3. The weighing sensor 8 is connected through the control cabinet 9. During specific operation, the weight information in the feeding bin 3 can be obtained through the weighing sensor 8. When the conveyor 5 is running, it can not only stabilize the feeding amount of the material, but also obtain the weight information of the raw material entering the conveyor 5 through the weight change, thereby obtaining the conveying weight of the conveyor 5 at different speeds, further controlling the conveying stability of the conveyor 5, and ensuring the stable operation of the crushing equipment or particle equipment.

[0036] Furthermore, the weighing sensor 8, the first variable frequency motor 2, and the second variable frequency motor 6 are synchronously controlled. During operation, the weighing sensor 8 collects data to control the rotation of the second variable frequency motor 6, ensuring its stable operation and facilitating the acquisition of the system's actual working efficiency. The operating speed of the second variable frequency motor 6 is then used to control the operating speed of the first variable frequency motor 2, allowing it to adjust the crushing and particle quality according to the conveying volume. For example, when producing different particle sizes, the difference between the rotational speed and the crushing speed is changed to improve the crushing effect. When crushing different materials, the feed rate is stabilized, and the crushing speed is adjusted to obtain the optimal speed ratio. This information is then recorded and set to achieve optimal production efficiency. When the system cannot achieve optimal operating efficiency, the more powerful first variable frequency motor 2 can adjust accordingly to follow the adjustment of the second variable frequency motor 6, thereby enabling diversified production processing, reducing equipment energy consumption, extending equipment lifespan, and meeting the production needs of different application scenarios on the same equipment, thus improving production efficiency.

[0037] As can be seen from the above technical solution, during operation, the required raw materials are sent to the storage unit. Initially, frequency conversion start control is used. During operation, the system is switched to frequency conversion start via control cabinet 9. After the equipment is running, the second frequency conversion motor 6 controls the conveyor 5 to feed the material. During feeding, the operating frequency of the second frequency conversion motor 6 is obtained through control cabinet 9, thereby controlling the rotation frequency of the first frequency conversion motor 2, enabling the two motors to work synchronously. The first frequency conversion motor 2 performs open-loop control based on the operating status of the second frequency conversion motor 6. In specific use, the conveying capacity of the conveyor 5 and the optimal operating frequency of the processing unit can be adjusted according to different materials, achieving optimal conveying capacity of the conveyor 5 and optimal processing capacity of the processing unit, thus improving processing efficiency and quality. When the system's processing capacity is not at full load, the second variable frequency motor 6 can reduce the conveying capacity, and the corresponding second variable frequency motor 6 will reduce its power to achieve energy saving. When the variable frequency starting equipment fails, the system can be adjusted to star-delta conversion reduced power frequency through the control cabinet 9, and the equipment can work normally at the normal frequency. Maintenance personnel can repair and replace the variable frequency equipment without affecting normal production.

[0038] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.

[0039] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A feed mill plant variable frequency control system, characterized by: Including storage unit, blanking unit and processing unit, the soft connection (4) between the storage unit and the blanking unit, the processing unit includes processing equipment (1) and first variable frequency motor (2), the blanking unit includes conveyor (5) and second variable frequency motor (6), the first variable frequency motor (2) and the second variable frequency motor (6) are controlled through control cabinet (9), and the first variable frequency motor (2) and the second variable frequency motor (6) are started through star angle conversion step-down power frequency or frequency converter variable frequency.

2. The variable frequency control system for feed mill equipment of claim 1, wherein, The control cabinet (9) includes adjusting knob (10), motor direction switch (11), motor start-stop switch (12) and multi-unit operation device indicator light (13), and the star angle conversion step-down power frequency or frequency converter variable frequency starting is controlled through the adjusting knob (10).

3. The variable frequency control system for feed mill equipment of claim 1, wherein, The soft connection (4) between the storage unit and the blanking unit, the blanking unit and the processing unit.

4. The variable frequency control system for feed mill equipment of claim 3, wherein, The storage unit includes feed bin (3), the bottom of the feed bin (3) is provided with weighing sensor (8), and the weighing sensor (8) is connected through the control cabinet (9).

5. The variable frequency control system for feed mill equipment of claim 4, wherein, The weighing sensor (8), first variable frequency motor (2) and second variable frequency motor (6) are synchronously controlled.

6. The variable frequency control system for feed mill equipment of claim 1, wherein, The processing equipment (1) is a pulverizer or a granulator.

7. The variable frequency control system for feed mill equipment of claim 1, wherein, The conveyor (5) is a screw conveyor.

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