Thermocouple intelligent temperature rise detection device for crystallizer copper plate of continuous casting machine

Abstract

A continuous casting machine crystallizer copper plate thermocouple intelligent heating detection device disclosed by the present invention is characterized in that the upper part of a heating rack of the device is provided with a sliding groove, a movable support is located on the surface of the heating rack and moves along the sliding groove through a sliding bearing, and temperature control heating assemblies are arranged on the movable support at intervals and are matched with thermocouples arranged in a crystallizer copper plate in position; the temperature measuring end of the PLC is connected with thermocouples arranged in a crystallizer copper plate through a signal cable and collects temperature values measured by the thermocouples, the power output end of the PLC is connected with the temperature control heating assembly through a power cable, and the temperature control heating assembly emits heat according to the temperature preset by the PLC and provides the temperature rise temperature of the thermocouples. The device overcomes the defects of traditional crystallizer copper plate thermocouple manual temperature rise detection, solves the problems that an existing crystallizer thermocouple manual temperature rise detection mode is single in function, poor in precision and low in accuracy, avoids steel breakout early warning false alarm and missing alarm risks in the production process, and ensures normal production and operation of a continuous casting machine.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to an intelligent temperature rise detection device for a thermocouple of a copper plate of a continuous casting machine crystallizer. Background Art

[0002] The crystallizer is the core component of the continuous casting machine, and its various performances are of great importance to the continuous casting production. The crystallizer leakage prediction system is an important equipment for the crystallizer and even the entire continuous casting machine. The thermocouple in the leakage prediction system is a key component. Inaccurate thermocouple temperature detection and misalignment of the thermocouple will lead to false alarms and missed alarms of the leakage prediction during the continuous casting process. In severe cases, it will lead to major production accidents such as overflow and leakage, causing serious economic losses.

[0003] At present, the temperature detection of thermocouples basically relies on manual heating of the crystallizer thermocouples. It can only detect whether the thermocouples are wired incorrectly, but it is completely unable to detect whether the temperature rise curve of the thermocouples is normal or whether the temperature measurement is accurate. This can easily lead to false alarms and missed alarms in the crystallizer steel leakage prediction system during the continuous casting process, seriously affecting the normal production of the continuous casting machine.

[0004] The main problems with the manual temperature rise detection method: 1. The crystallizer thermocouple relies entirely on artificial heating for detection, which has poor detection accuracy and cannot meet the process requirements.

[0005] 2. The corresponding relationship between manual heating and wiring cannot be determined, and the position of the thermocouple and the installation position may be misaligned.

[0006] 3. Manually increase the temperature to detect the thermocouple status. The thermocouple temperature curve may be inverted.

[0007] 4. Without a complete set of detection equipment, the status of the thermocouple cannot be guaranteed, and there is a risk of false alarm or missed alarm of steel leakage warning during the production process, leading to major accidents.

[0008] 5. Through manual record keeping, the test data is not convenient to call and save. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide an intelligent temperature rise detection device for a continuous casting machine crystallizer copper plate thermocouple. The device overcomes the defects of the traditional manual temperature rise detection of the crystallizer copper plate thermocouple, solves the problems of the existing manual temperature rise detection method of the crystallizer thermocouple with single function, poor precision and low accuracy, avoids the risk of false alarm and missed alarm of steel leakage warning in the production process, and ensures the normal production operation of the continuous casting machine.

[0010] In order to solve the above technical problems, the intelligent temperature rise detection device of thermocouple of continuous casting machine crystallizer copper plate of the present invention comprises a temperature rise stand abutting against the surface of the crystallizer copper plate, a movable bracket, a temperature control heating component and a PLC controller, the upper part of the temperature rise stand is provided with a slide groove, the movable bracket is located on the surface of the temperature rise stand and moves along the slide groove through a sliding bearing, the temperature control heating component is arranged at intervals on the movable bracket, and matches the position of the thermocouples arranged in the crystallizer copper plate, the temperature measuring end of the PLC controller is connected to the thermocouples arranged in the crystallizer copper plate through a signal cable, and the temperature value measured by the thermocouple is collected, the power output end of the PLC controller is connected to the temperature control heating component through a power cable, and the temperature control heating component generates heat according to the temperature preset by the PLC controller to provide the temperature rise temperature of the thermocouple.

[0011] Furthermore, the temperature control and heating component includes a stainless steel heating block and a heating wire built into the stainless steel heating block.

[0012] Furthermore, the PLC controller includes a display screen, and the temperature value measured by the thermocouple collected by the PLC controller is displayed on the display screen.

[0013] Furthermore, the temperature-controlled heating component has an operating voltage of 220V, a heating power of 2500W, a heating temperature continuously adjustable from 0 to 150°C, and a heating time of 3 minutes.

[0014] Furthermore, the signal cable connecting the temperature measuring end of the PLC controller and the thermocouples arranged in the copper plate of the crystallizer is a compensation wire.

[0015] Furthermore, the device also includes a host computer. The temperature values ​​measured by the thermocouples collected by the PLC controller are transmitted to the host computer via a wired or wireless network. The host computer establishes a database to store the measurement data, generates a thermocouple temperature measurement curve and a test result ticket, and the test result ticket is stored in Excel or PDF format. The host computer is connected to a printer to print the thermocouple temperature measurement curve and the test result ticket for retention.

[0016] Since the intelligent temperature rise detection device for thermocouples of the copper plate of the crystallizer of the continuous casting machine of the present invention adopts the above technical scheme, that is, a slide groove is provided on the upper part of the temperature rise platform of the device, the movable bracket is located on the surface of the temperature rise platform and moves along the slide groove through the sliding bearing, the temperature control heating component is arranged at intervals on the movable bracket, and matches the position of the thermocouples arranged in the copper plate of the crystallizer, the temperature measuring end of the PLC controller is connected to the thermocouples arranged in the copper plate of the crystallizer through a signal cable, and the temperature value measured by the thermocouple is collected, and the power output end of the PLC controller is connected to the temperature control heating component through a power cable, and the temperature control heating component generates heat according to the temperature preset by the PLC controller to provide the temperature rise of the thermocouple. The device overcomes the defects of the manual temperature rise detection of the copper plate of the traditional crystallizer thermocouple, solves the problems of the single function, poor precision and low accuracy of the existing manual temperature rise detection method of the crystallizer thermocouple, avoids the risk of false alarm and omission of steel leakage warning in the production process, and ensures the normal production and operation of the continuous casting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a structural schematic diagram of the continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device of the present invention. DETAILED DESCRIPTION

[0018] Implementation example Figure 1 As shown, the intelligent temperature rise detection device of thermocouple of copper plate of crystallizer of continuous casting machine of the present invention comprises a temperature rise stand 1 abutting against the surface of copper plate of crystallizer, a movable bracket 2, a temperature control and heating component 3 and a PLC controller 4, the upper part of the temperature rise stand 1 is provided with a slide groove 11, the movable bracket 2 is located on the surface of the temperature rise stand 1 and moves along the slide groove 11 through a sliding bearing, the temperature control and heating component 3 is arranged at intervals on the movable bracket 2, and matches the position of the thermocouple 6 arranged in the copper plate of crystallizer, the temperature measuring end of the PLC controller 4 is connected to the thermocouple 6 arranged in the copper plate of crystallizer through a signal cable, and the temperature value measured by the thermocouple 6 is collected, the power output end of the PLC controller 1 is connected to the temperature control and heating component 3 through a power cable, the temperature control and heating component 3 generates heat according to the preset temperature of the PLC controller 4, and provides the temperature rise temperature of the thermocouple.

[0019] Preferably, the temperature control heating component 3 includes a stainless steel heating block and a heating wire built into the stainless steel heating block.

[0020] Preferably, the PLC controller 4 includes a display screen, and the temperature value measured by the thermocouple collected by the PLC controller 4 is displayed on the display screen.

[0021] Preferably, the temperature-controlled heating component 3 has an operating voltage of 220V, a heating power of 2500W, a heating temperature continuously adjustable from 0 to 150°C, and a heating time of 3 minutes.

[0022] Preferably, the signal cable connecting the temperature measuring end of the PLC controller 4 and the thermocouples arranged in the copper plate of the crystallizer is a compensation wire.

[0023] Preferably, the device also includes a host computer 5, and the temperature value measured by the thermocouple collected by the PLC controller 4 is transmitted to the host computer 5 via a wired or wireless network. The host computer 5 establishes a database to store the measurement data, generates a thermocouple temperature measurement curve and a test result ticket, and the test result ticket is stored in Excel or PDF format. The host computer 5 is connected to a printer to print the thermocouple temperature measurement curve and the test result ticket for retention.

[0024] The heating stand in this device mainly supports the temperature control and heating component, and is fixed to the copper plate of the crystallizer to ensure that the temperature control and heating component is closely attached to the copper plate of the crystallizer, so that the heating efficiency of the temperature control and heating component is transmitted to the thermocouple to the maximum extent. The heating stand is manually fixed to the copper plate of the crystallizer.

[0025] The mobile bracket is the base of the temperature control and heating component. It is made of aluminum alloy to reduce the overall weight of the device. Multi-row temperature control and heating components can achieve fine-tuning of the distance before heating to facilitate more accurate placement of the temperature control and heating components close to the thermocouple temperature measuring point. The mobile bracket is moved by sliding bearings, and the operator can move the mobile bracket into place as needed.

[0026] From a safety perspective, the temperature-controlled heating component does not use open flames. Heat is provided by the built-in heating wire in the stainless steel heating block. The temperature is increased according to the temperature rise start and temperature rise preset curve given by the PLC controller, with a maximum temperature of 150 degrees.

[0027] The signal cable sends the thermocouple detection signal to the PLC controller. The signal cable uses a compensation wire, and the connectors used are consistent with the crystallizer working site; the power cable provides power to the temperature control heating component and uses a high-temperature resistant cable; both cables are soft cables and are equipped with protective covers, and can move with the mobile bracket.

[0028] The main function of the PLC controller is to control the temperature rise, collect the temperature values ​​measured by the thermocouples, and transmit the data to the display screen for display and the host computer for data storage.

[0029] Before the thermocouple temperature rise detection, the circuit switching function is used to measure the resistance values ​​of multiple thermocouples and record them in the database. At the beginning of the measurement, the thermocouple is switched to the DC circuit, and each thermocouple is connected to a 12V voltage, the current of the loop is detected, and the resistance is calculated. During the measurement process of connecting the thermocouples one by one, it is judged whether the wiring of the thermocouples is correct.

[0030] When the crystallizer copper plate thermocouple is testing the temperature rise: The operator installs and fixes the heating stand on the copper plate of the crystallizer to be tested, adjusts the movable bracket, places all the temperature control and heating components on the movable bracket close to the surface of the copper plate of the crystallizer, and matches the points of a row of thermocouples at the location of the movable bracket; Connect all data transmission cables and heating power cables accurately; Start the power supply, input the set heating temperature in the PLC controller, and press the heating start button to start heating; The operator observes the temperature rise data on the display screen to see whether it is stable and meets the temperature rise curve standard. Combined with the information fed back by the PLC controller, the operator comprehensively judges whether the thermocouple is working normally and meets the standard. After the test of the thermocouple row is completed, the operator moves the mobile bracket to the position of the next thermocouple row and repeats the above operation until all thermocouples have completed the test. If the thermocouple is found to be abnormal during the test, the faulty thermocouple can be immediately processed or replaced; After all thermocouple tests on the crystallizer copper plate are completed and ensured to be accurate, the operator can save the relevant data of this test in the PLC controller or upload it to the host computer for later test data traceability; After all the testing work is completed, turn off the power, disconnect all connecting cables, remove the heating stand from the crystallizer copper plate and place it at the designated location to end this testing task.

[0031] Compared with the traditional manual detection method, this device can realize the full process automatic temperature rise detection and detection data collection function of the thermocouple, change the current situation of completely relying on manual temperature rise to test and detect the crystallizer copper plate thermocouple under the maintenance state, ensure the normal working state of the thermocouple, improve the accuracy of online steel leakage prediction when the crystallizer is put into use, reduce the probability of missed alarm and false alarm, and reduce the occurrence of steel overflow and steel leakage accidents. It has the following technical effects: 1) Change the heating mode from manual to intelligent.

[0032] 2) High-power electric heating, safe and reliable.

[0033] 3) Comparison of heating curve and detection curve.

[0034] 4) The intelligent heating accuracy is high and the working status of the thermocouple can be fully judged.

[0035] 5) It can effectively prevent the phenomenon of thermocouple temperature curve being inverted.

[0036] 6) It can effectively improve the accuracy of steel leakage prediction and reduce the accident rate of steel leakage.

[0037] Technical performance indicators and parameters achieved: 1) The heating accuracy of the temperature control heating component is ±2 degrees.

[0038] 2) The normal detection rate is ≥99%.

[0039] 3) Thermocouple detection accuracy ≥ 99%.

[0040] This device can simultaneously heat up multiple thermocouple detection points in a longitudinal row of the crystallizer copper plate. The heating curve is heated according to the set temperature, the actual heating temperature of the thermocouple is detected and displayed, and the detection results are transmitted to the host computer to generate data for recording. After the heating is completed, the host computer automatically determines whether the status of the current row of thermocouples meets the standard. After the detection of one row of thermocouples is completed, the heating bracket is moved to the position of the next row of thermocouples to restart the thermocouple detection process until all thermocouples are detected, and finally a crystallizer copper plate thermocouple heating detection record data table is generated.

Claims

1. A continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device, characterized in that: It includes a heating stand attached to the surface of the copper plate of the crystallizer, a movable bracket, a temperature control and heating component and a PLC controller. The upper part of the heating stand is provided with a slide groove. The movable bracket is located on the surface of the heating stand and moves along the slide groove through a sliding bearing. The temperature control and heating component is arranged at intervals on the movable bracket and matches the position of the thermocouples arranged in the copper plate of the crystallizer. The temperature measuring end of the PLC controller is connected to the thermocouples arranged in the copper plate of the crystallizer through a signal cable to collect the temperature values ​​measured by the thermocouples. The power output end of the PLC controller is connected to the temperature control and heating component through a power cable. The temperature control and heating component generates heat according to the temperature preset by the PLC controller to provide the heating temperature of the thermocouple.

2. The continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device according to claim 1, characterized in that: The temperature control and heating component comprises a stainless steel heating block and an electric heating wire built in the stainless steel heating block.

3. The continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device according to claim 1 or 2, characterized in that: The PLC controller comprises a display screen, and the temperature value measured by the thermocouple collected by the PLC controller is displayed on the display screen.

4. The continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device according to claim 3, characterized in that: The temperature control heating component has an operating voltage of 220V, a heating power of 2500W, a heating temperature of 0 to 150°C which is continuously adjustable, and a heating time of 3 minutes.

5. The continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device according to claim 1, characterized in that: The signal cable connecting the temperature measuring end of the PLC controller and the thermocouples arranged in the copper plate of the crystallizer is a compensation wire.

6. The continuous casting machine crystallizer copper plate thermocouple intelligent temperature rise detection device according to claim 1, characterized in that: The device also includes a host computer. The temperature values ​​measured by the thermocouples collected by the PLC controller are transmitted to the host computer via a wired or wireless network. The host computer establishes a database to store the measurement data, generates a thermocouple temperature measurement curve and a test result ticket, and the test result ticket is stored in Excel or PDF format. The host computer is connected to a printer to print the thermocouple temperature measurement curve and the test result ticket for retention.

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