Molten aluminum casting holding furnace temperature measuring system

Abstract

The utility model relates to the technical field of temperature measuring systems for molten aluminum casting holding furnaces, in particular to a temperature measuring system for a molten aluminum casting holding furnace, which comprises a holding furnace and a controller. A master control chip of the controller selects an RISC-V MCU microcontroller CH592 integrated with BLE wireless communication, is electrically connected with a display module, a sensor module, an alarm circuit module, a driving circuit and a power supply module, and is in bidirectional communication with the Ethernet through an RS485 module, the sensor module is a chip MAX6675, one end of the sensor module is connected with a K-type thermocouple collector, the other end of the sensor module is connected with a transceiver of the CH592, and the other end of the sensor module is connected with a microprocessor. And the microprocessor is wirelessly connected with the MCU microcontroller CH592 through a self-defined 2.4 G wireless radio frequency format. The temperature management system can conveniently realize the functions of real-time and online acquisition of furnace wall temperature management data and Ethernet transmission, simplifies the processes of installation, debugging, maintenance and the like of the system, and has the characteristics of wireless data transmission, low power consumption and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature measurement systems for aluminum liquid casting and insulation furnaces, in particular to a temperature measurement system for aluminum liquid casting and insulation furnaces. Background Art

[0002] The main function of the holding furnace is to keep the aluminum liquid stable within a certain temperature range, ensuring that the aluminum liquid is always at a suitable temperature during the casting process. Through the heating effect of the heating element, the aluminum liquid in the furnace can be kept at a constant temperature, thus meeting the basic needs of aluminum liquid casting. The holding furnace can extend the insulation time of the aluminum liquid and reduce production interruptions caused by temperature fluctuations, thereby improving production efficiency. During the aluminum liquid casting process, the stable operation of the holding furnace can ensure the continuous supply of aluminum liquid, ensure the smooth operation of the production line, and avoid the unstable quality of aluminum ingots caused by temperature fluctuations. The stable aluminum liquid temperature can ensure the consistency of the crystallization and freezing speed of the aluminum ingot, thereby improving the quality and performance of the aluminum ingot.

[0003] The existing holding furnace is highly efficient in heating, using electric or gas heating. The heating element is installed inside the furnace, and heat is generated by resistance heating or gas combustion, which can quickly heat the aluminum liquid to the required temperature. It can also accurately control the temperature, monitor and control the temperature in the furnace in real time, and adjust the power and heating time of the heating element to achieve accurate control of the aluminum liquid temperature, ensuring the temperature stability of the aluminum liquid during the casting process. However, the system connecting the heating element and the temperature acquisition is not smart and stable enough, which is reflected in the fact that most of the temperature acquisition is transmitted through wires. However, in order to grasp the temperature of each part inside the holding furnace, and the wired transmission is prone to loss such as degumming on the surface of the connecting line due to high temperature, a system with intelligent, wireless transmission, low power consumption and timely feedback is needed. Utility Model Content

[0004] In order to overcome the existing deficiencies, the utility model provides a temperature measuring system for an aluminum liquid casting and holding furnace.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a temperature measurement system for an aluminum liquid casting insulation furnace, comprising a insulation furnace and a controller; the main control chip of the controller selects a RISC-V MCU microcontroller CH592 with integrated BLE wireless communication, which is electrically connected to a display module, a sensor module, an alarm circuit module, a drive circuit and a power supply module, and communicates bidirectionally with Ethernet through an RS485 module; the sensor module is a chip MAX6675, one end of which is connected to a K-type thermocouple collector, and the other end is connected to a transceiver of CH592, and is wirelessly connected to the MCU microcontroller CH592 through a custom 2.4G wireless radio frequency format; the K-type thermocouple collector is arranged in the insulation furnace; the drive circuit comprises a solenoid valve drive circuit and a heater drive circuit, the solenoid valve drive current is connected to the solenoid valve at the inlet and outlet of the insulation furnace, the heater drive circuit is connected to a heating couple, and the heating couple is arranged inside the insulation furnace.

[0006] According to another embodiment of the utility model, the display module is further connected to a liquid crystal display LCD1602; and the alarm circuit module is connected to a buzzer.

[0007] According to another embodiment of the utility model, it further includes that the main control chip is a 32-bit RISC-V4C core of Qingke, has a built-in RTC clock and 12-channel key touch, is powered by a power module, receives input signals from the sensor module, transmits output signals to the display module, the alarm circuit module, and the drive circuit, and communicates bidirectionally with Ethernet through an RS485 module.

[0008] According to another embodiment of the utility model, the insulation furnace is further provided with a plurality of groups of mounting holes arranged above and below, and K-type thermocouple collectors are sealed and installed in the mounting holes.

[0009] According to another embodiment of the utility model, the K-type thermocouple collector further includes a ceramic protective sleeve and a K-type thermocouple, the ceramic protective sleeve is welded externally in the mounting hole, a threaded interface is provided internally, and the K-type thermocouple is installed in the threaded interface.

[0010] According to another embodiment of the utility model, it further includes that an aluminum liquid degasser and a nitrogen pipeline are arranged in the insulation furnace, and a heating couple is arranged in parallel in the middle.

[0011] The beneficial effect of the utility model is that the temperature management system can conveniently realize the real-time, online collection of furnace wall temperature management data, as well as the function of Ethernet transmission, which simplifies the system installation, debugging, maintenance and other processes, and has the characteristics of wireless data transmission and low power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is the controller temperature acquisition flow chart;

[0015] Figure 3 This is the working process diagram of the heating couple;

[0016] Figure 4 This is a schematic diagram of the installation of a K-type thermocouple collector.

[0017] In the figure, 1, a holding furnace, 2, a controller, 3, a K-type thermocouple collector, 4, a heating couple, 5, a ceramic protective sleeve, and 6, a K-type thermocouple. DETAILED DESCRIPTION

[0018] like Figure 1 It is a structural schematic diagram of the utility model, a temperature measurement system for the furnace wall of an aluminum liquid casting insulation furnace, characterized in that it includes an insulation furnace 1 and a controller 2; the main control chip of the controller 2 is a RISC-V MCU microcontroller CH592 with integrated BLE wireless communication, which is electrically connected to a display module, a sensor module, an alarm circuit module, a drive circuit and a power module, and communicates bidirectionally with RS485 and Ethernet, the sensor module is a chip MAX6675, one end of which is connected to a K-type thermocouple collector 3, and the other end is connected to a transceiver of CH592, and is wirelessly connected to the MCU microcontroller CH592 through a custom 2.4G wireless radio frequency format; the K-type thermocouple collector 3 is arranged on the furnace wall of the insulation furnace 1; the drive circuit includes an electromagnetic valve drive circuit and a heater drive circuit, the electromagnetic valve drive current is connected to the electromagnetic valve at the inlet and outlet of the insulation furnace 1, the heater drive circuit is connected to a thermocouple 4, and the thermocouple 4 is arranged inside the insulation furnace 1.

[0019] Specifically, the controller 2 is responsible for receiving the data sent by the transceiver of CH592 through the wireless gateway, and sending the received data to the host computer through Ethernet. The software design process of the wireless data acquisition gateway includes initialization, judging the information reception situation and responding, polling and querying data and sending data to the host computer, etc.; the CH592 software implementation mainly includes the chip MAX6675 data acquisition software implementation, wireless communication, RS485 communication and timing interrupt software implementation, which are used to detect the temperature in the insulation furnace 1 and the wireless transmission of data. After the CH592 transceiver terminal is powered on, the hardware is initialized, and then the temperature sensing element starts to detect the temperature and converts the temperature signal into a corresponding millivolt signal, which is finally transmitted through the wireless gateway of CH592. The collected temperature data is put into the buffer and waits for the host computer to query. When the host computer issues a collection command, the terminal goes to sleep, stops collecting data, and only transmits data. The gateway polls the terminal, and the terminal goes to sleep after the query is completed, waiting for the next collection.

[0020] According to another embodiment of the utility model, the display module is further connected to a liquid crystal display LCD1602; and the alarm circuit module is connected to a buzzer.

[0021] According to another embodiment of the utility model, it further includes that the main control chip is a 32-bit RISC-V4C core of Qingke, has a built-in RTC clock and 12-channel key touch, is powered by a power module, receives input signals from the sensor module, transmits output signals to the display module, the alarm circuit module, and the drive circuit, and communicates bidirectionally with Ethernet through an RS485 module.

[0022] Specifically, CH592 is a RISC-V MCU microcontroller with integrated BLE wireless communication. It integrates a 2Mbps low-power Bluetooth BLE communication module, a full-speed USB host and device controller and transceiver, a segment LCD driver module, SPI, 4 serial ports, 12-channel ADC, a touch button detection module and other rich peripheral resources. The built-in real-time clock RTC supports both timing and triggering modes. Among them, the power supply of the CH592 transceiver is mainly DC-powered by industrial lithium batteries, which has low power consumption, low cost and energy saving. The CH592 is powered by a power module, which filters the DC 220v voltage and converts it into 5v and then into 3.3v to power the main control chip.

[0023] According to another embodiment of the utility model, it further includes that a plurality of groups of mounting holes are arranged on the upper and lower walls of the insulation furnace 1, and a K-type thermocouple collector 3 is sealed and installed in the mounting holes.

[0024] According to another embodiment of the utility model, the K-type thermocouple collector 3 further includes a ceramic protective sleeve 5 and a K-type thermocouple 6, the ceramic protective sleeve 5 is welded externally in the mounting hole, and a threaded interface is provided internally, and the K-type thermocouple 6 is installed in the threaded interface.

[0025] According to another embodiment of the utility model, it further includes that an aluminum liquid degasser and a nitrogen pipeline are arranged in the insulation furnace 1, and a heating couple 4 is arranged in parallel in the middle.

[0026] In the specific operation process, the upper and lower temperatures of the holding furnace 1 are detected by the K-type thermocouple 6 in the K-type thermocouple collector 3, and the temperature data is collected by the controller 2. After the collection, the main control chip analyzes it. If it is confirmed that the temperature is appropriate, the solenoid valve drive circuit in the drive circuit is turned on, and the aluminum liquid flows into the diverter through the outlet for diversion. If the temperature is too low, the heater drive circuit is turned on for temperature adjustment. If the temperature is abnormal for a long time, the alarm module will be used to prompt, and the operation data information is displayed through the display module and transmitted to the host computer for storage, analysis and recording.

[0027] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A temperature measurement system for the furnace wall of an aluminum liquid casting and holding furnace, characterized in that: The invention comprises a heat preservation furnace (1) and a controller (2); the main control chip of the controller (2) is a RISC-V MCU microcontroller CH592 with integrated BLE wireless communication, which is electrically connected to a display module, a sensor module, an alarm circuit module, a drive circuit and a power supply module, and communicates bidirectionally with RS485 and Ethernet; the sensor module is a chip MAX6675, one end of which is connected to a K-type thermocouple collector (3) and the other end is connected to a transceiver of CH592, and is wirelessly connected to the MCU microcontroller CH592 through a custom 2.4G wireless radio frequency format; the K-type thermocouple collector (3) is arranged on the furnace wall of the heat preservation furnace (1); the drive circuit comprises an electromagnetic valve drive circuit and a heater drive circuit, the electromagnetic valve drive current is connected to the electromagnetic valve at the inlet and outlet of the heat preservation furnace (1), the heater drive circuit is connected to a heating couple (4), and the heating couple (4) is arranged inside the heat preservation furnace (1).

2. The temperature measurement system for the furnace wall of the aluminum liquid casting and holding furnace according to claim 1 is characterized in that: The display module is connected to the liquid crystal display LCD1602; the alarm circuit module is connected to the buzzer.

3. The temperature measurement system for the furnace wall of the aluminum liquid casting and holding furnace according to claim 1 is characterized in that: The main control chip is a 32-bit RISC-V4C core of Qingke, with a built-in RTC clock and 12-channel key touch, powered by a power module, receives input signals from the sensor module, transmits output signals to the display module, alarm circuit module, and drive circuit, and communicates bidirectionally with Ethernet through an RS485 module.

4. The temperature measurement system for the furnace wall of the aluminum liquid casting and holding furnace according to claim 1 is characterized in that: The insulation furnace (1) has a plurality of groups of mounting holes arranged on the upper and lower walls thereof, and a K-type thermocouple collector (3) is sealed and installed in the mounting holes.

5. The temperature measurement system for the furnace wall of the aluminum liquid casting and holding furnace according to claim 4 is characterized in that: The K-type thermocouple collector (3) comprises a ceramic protective sleeve (5) and a K-type thermocouple (6); the ceramic protective sleeve (5) is welded externally in a mounting hole and is internally provided with a threaded interface, in which the K-type thermocouple (6) is installed.

6. The temperature measurement system for the furnace wall of the aluminum liquid casting and holding furnace according to claim 1 is characterized in that: The insulation furnace (1) is provided with an aluminum liquid degasser and a nitrogen pipeline, and a heating couple (4) is arranged in parallel in the middle.

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