Molten aluminum pool temperature control system
By using nested PID control loops and multi-feedback system in the aluminum liquid pool, the problem of inconsistent temperature of the aluminum liquid treatment pool and short heater life is solved, and the precise control and electricity of the aluminum liquid temperature are achieved. The long life and energy-saving effect of the heater.
Patent Information
- Application Number
- CN202420764761.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the prior art, the temperature consistency of the aluminum liquid treatment pool is poor and the heater life is short.
The aluminum liquid pool temperature control system is adopted, including a first thermocouple, a PLC master controller, a PLC slave controller, a power regulator and an electric heater. The electrical power is adjusted in real time through a nested PID temperature cascade control loop and a multi-feedback system. The power of the heater is used to achieve precise control of the aluminum liquid temperature.
It improves the stability and consistency of liquid aluminum temperature, extends the service life of the electric heater, and has good energy saving and environmental protection.
Smart Images
Figure CN222167486U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of melting furnace temperature control devices, and specifically relates to a temperature control system for an aluminum liquid pool. Background Art
[0002] According to the needs of integrated die-casting equipment, an aluminum liquid treatment pool needs to be added to the melting furnace side to improve the overall efficiency of the equipment. The industry generally uses the melting furnace insulation chamber gas burner to ignite and heat the aluminum liquid directly to the back-end equipment. The gas power consumption is large and the cost is high. The general solution uses PWM to output the heating value, which causes the heater to start and stop frequently, resulting in a short heater life and poor consistency of aluminum liquid temperature. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a temperature control system for a molten aluminum pool, aiming to solve the problems of poor temperature consistency and short heater life in the molten aluminum treatment pool.
[0004] The utility model provides a temperature control system for an aluminum liquid pool, comprising an aluminum liquid treatment pool with a first thermocouple arranged inside, a PLC main controller electrically connected to the first thermocouple, a PLC slave controller electrically connected to the PLC main controller, a power regulator electrically connected to the PLC slave controller, an electric heater electrically connected to the power regulator, and a second thermocouple built into the electric heater, wherein the input end of the PLC main controller is connected to the first thermocouple to receive the actual temperature of the aluminum liquid, and the output end of the PLC main controller is connected to the PLC slave controller to change the set value of the internal temperature of the electric heater in real time, the PLC slave controller is electrically connected to the second thermocouple to receive the actual internal temperature of the electric heater and adjust the power of the electric heater in real time through the power regulator in combination with the set value to achieve temperature control of the aluminum liquid.
[0005] In other embodiments, the electric heater is an electric heating rod.
[0006] In other embodiments, the electric heating rod is fixedly connected to a pool cover of the aluminum liquid processing pool.
[0007] In other embodiments, the electric heating rod is perpendicular to the bottom of the aluminum liquid processing tank.
[0008] In other embodiments, the number of the second thermocouples is equal to the number of the PLC slave controllers.
[0009] Beneficial effect: The utility model provides a temperature control system for a molten aluminum pool, including a PLC master controller electrically connected to a first thermocouple, and a PLC slave controller electrically connected to the PLC master controller, wherein the input end of the PLC master controller is connected to the first thermocouple and the output end of the PLC master controller is connected to the PLC slave controller, and the PLC slave controller is electrically connected to the second thermocouple through a power regulator to adjust the power of the electric heater in real time to achieve temperature control of the molten aluminum. The PLC master controller and the PLC slave controller form a multi-feedback control system through mutually nested PID temperature cascade control loops, which improves the stability and efficiency of the molten aluminum temperature control, realizes the precise temperature control of the molten aluminum, and ensures the consistency of the molten aluminum temperature. The temperature control system enables the electric heater to work stably in a certain power output range, effectively prolonging the service life of the electric heater, and the temperature control system adopts electric power regulation, which has good energy-saving and environmental protection properties. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a structural block diagram of a temperature control system for a molten aluminum pool in an embodiment of the utility model;
[0011] Figure 2 This is a schematic diagram of a temperature control system for a liquid aluminum pool in an embodiment of the utility model;
[0012] In the figure, 1 is an aluminum liquid treatment pool, 11 is a pool cover, 2 is a power regulator, 3 is an electric heater, 41 is a first thermocouple, 42 is a second thermocouple, 5 is a PLC master controller, and 6 is a PLC slave controller. DETAILED DESCRIPTION
[0013] A temperature control system for a molten aluminum pool, such as Figures 1 to 2As shown, it includes an aluminum liquid treatment pool 1 with a first thermocouple 41 inside, a PLC main controller 5 electrically connected to the first thermocouple 41, a PLC slave controller 6 electrically connected to the PLC main controller 5, a power regulator 2 electrically connected to the PLC slave controller 6, an electric heater 3 electrically connected to the power regulator 2, and a second thermocouple 42 built into the electric heater 3. The input end of the PLC main controller 5 is connected to the first thermocouple 41 to receive the actual temperature of the aluminum liquid, and the output end of the PLC main controller 5 is connected to the PLC slave controller 6 to change the set value of the internal temperature of the electric heater 3 in real time. The PLC slave controller 6 is electrically connected to the second thermocouple 42 to receive the actual internal temperature of the electric heater 3 and adjust the power of the electric heater 3 in real time through the power regulator 2 in combination with the set value to achieve temperature control of the aluminum liquid. In the temperature control system, a PID temperature cascade configuration control is formed by a PLC main controller 5 and a PLC slave controller 6, and multiple control loops are nested with each other. The output of the PLC main controller 5 is used as the set value of the PLC slave controller 6. The actual temperature of the aluminum liquid and the actual internal temperature of the electric heater 3 are respectively detected by the first thermocouple 41 and the second thermoelectric thermocouple 42 to form a multi-feedback control system, which improves the stability and efficiency of the aluminum liquid temperature control, realizes the precise temperature control of the aluminum liquid, and ensures the consistency of the aluminum liquid temperature. The temperature control system can enable the electric heater 3 to work stably in a certain power output range, effectively extending the service life of the electric heater 3, and the temperature control system adopts power regulation, which has good energy saving and environmental protection.
[0014] In another embodiment, the electric heater 3 is an electric heating rod. As a common heater component, the electric heating rod reduces the manufacturing cost of the temperature control system. It has a high structural strength, is not easy to bend, is not easy to be overlooked, and has explosion-proof performance, which can effectively ensure the safety of the temperature control system. In addition, the electric heating rod heats evenly and has low power loss, which further improves the stability, high efficiency and energy saving and environmental protection of the aluminum liquid temperature control. Preferably, the electric heating rod is fixedly connected to the pool cover 11 of the aluminum liquid treatment pool 1, so that the installation of the temperature control system is simple and convenient. Furthermore, the electric heating rod is perpendicular to the bottom of the aluminum liquid treatment pool 1. This setting can make the electric heater 3 compatible with the depth direction of the aluminum liquid, and can evenly heat the aluminum liquid at different depths, further improving the stability of the aluminum liquid temperature control.
[0015] In another embodiment, the number of the second thermocouples 42 is equal to the number of the PLC slave controllers 6. The second thermocouples 42 correspond to the PLC slave controllers 6 one by one. In the temperature control system, the second thermocouples 42 can be set at different positions as needed to obtain a better feedback effect, further improve the stability and efficiency of the temperature control system for the aluminum liquid temperature control, realize the precise temperature control of the aluminum liquid, and ensure the consistency of the aluminum liquid temperature.
[0016] The control logic of the temperature control system is as follows: the PLC master controller 5 performs PID calculation according to the temperature difference ΔT1 fed back by the first thermocouple 41 in the aluminum liquid treatment pool 1, calculates the output temperature of the electric heater 3 required to reach the preset aluminum liquid set temperature through the built-in program, and changes the set value of the internal temperature of the electric heater 3 in real time, that is, the output of the PLC master controller 5 is used as the set value of the PLC slave controller 6. The PLC slave controller 6 performs PID calculation according to the temperature difference ΔT2 fed back by the second thermocouple 42 inside the electric heater 3, and then realizes precise control of the internal temperature of the electric heater 3 through the power regulator 2. Through the continuous adjustment of the PLC master controller 5 and the PLC slave controller 6, the electric heater 3 can work stably in a certain power output range and reach the required aluminum liquid temperature.
[0017] The above implementation modes are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with the technology in this field can understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A temperature control system for a molten aluminum pool, characterized in that: The invention comprises an aluminum liquid treatment pool (1) having a first thermocouple (41) arranged therein, a PLC main controller (5) electrically connected to the first thermocouple (41), a PLC slave controller (6) electrically connected to the PLC main controller (5), a power regulator (2) electrically connected to the PLC slave controller (6), an electric heater (3) electrically connected to the power regulator (2), and a second thermocouple (42) built into the electric heater (3), wherein the input end of the PLC main controller (5) is connected to the first thermocouple (41) to receive the actual temperature of the aluminum liquid, and the output end of the PLC main controller (5) is connected to the PLC slave controller (6) to change the set value of the internal temperature of the electric heater (3) in real time, and the PLC slave controller (6) is electrically connected to the second thermocouple (42) to receive the actual internal temperature of the electric heater (3) and adjust the power of the electric heater (3) in real time through the power regulator (2) in combination with the set value to achieve temperature control of the aluminum liquid.
2. The aluminum liquid pool temperature control system according to claim 1 is characterized in that: The electric heater (3) is an electric heating rod.
3. The aluminum liquid pool temperature control system according to claim 2 is characterized in that: The electric heating rod is fixedly connected to the pool cover (11) of the aluminum liquid treatment pool (1).
4. The aluminum liquid pool temperature control system according to claim 3 is characterized in that: The electric heating rod is perpendicular to the bottom of the aluminum liquid treatment pool (1).
5. The aluminum liquid pool temperature control system according to claim 1 is characterized in that: The number of the second thermocouples (42) is equal to the number of the PLC slave controllers (6).