An apparatus for measuring the liquid level of an aluminium electrolysis cell

Abstract

The utility model discloses a kind of aluminium electrolytic cell liquid level height measuring devices, including electric push rod and the pull rope displacement sensor of detecting electric push rod elongation amount installed on external support, the telescopic end of electric push rod is equipped with measuring casing, the bottom of measuring casing is equipped with measuring probe, measuring probe is connected anode busbar by wire assembly, wire assembly includes measuring wire and connecting wire, measuring wire is located inside measuring casing, measuring wire electrically connected measuring probe and connecting wire, the end of connecting wire away from measuring wire and anode busbar electrically connected. The aluminium electrolytic cell liquid level height measuring device can detect electrolyte level and aluminium water level, and can also be used to detect parameters such as polar distance and electrolyte resistance, and detect the temperature of electrolyte and aluminium liquid. It does not require human intervention, can eliminate the interference of human error, can also save manpower, improve work efficiency and is easy to use.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolysis technology, specifically to a device for measuring the liquid level in an aluminum electrolysis cell. Background Technology

[0002] In the production of electrolytic aluminum, the levels of molten aluminum and electrolytes in the electrolytic cell are two crucial process parameters. Excessive measurement errors can disrupt the thermal or magnetic balance of the electrolytic cell, leading to reduced aluminum production, increased energy consumption, and increased labor intensity for workers. Currently, the measurement of aluminum and electrolyte levels in electrolytic aluminum production relies on traditional manual methods. Specifically, a measuring rod is inserted into the molten metal in the electrolytic cell, left for a period of time, and then removed. The adhesion of molten metal to the rod is observed, and then measured with a steel ruler to obtain the electrolyte and aluminum levels. This manual measurement method is highly susceptible to the operator's experience and technique, making data accuracy difficult to guarantee. Furthermore, it is inefficient and labor-intensive. In the harsh environment of the electrolytic workshop, with strong magnetic interference, high temperatures, and dust, manual measurement also poses certain safety hazards.

[0003] Timely and accurate measurement and understanding of process parameters such as aluminum level and electrolyte level in aluminum electrolysis cells are of paramount importance for timely understanding of the electrolysis cell's operating status, optimizing production processes, improving production efficiency, reducing energy consumption, and ensuring production safety. They are also key data for the construction of digital electrolysis cells.

[0004] Traditional manual measurements are easily affected by subjective factors (such as the uniformity of measurement locations and the standardization of measurement methods), which can directly lead to inconsistent data results and make it difficult to accurately reflect the actual situation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a device for measuring the liquid level of an aluminum electrolysis cell. This device can detect the electrolyte level and the aluminum liquid level, as well as parameters such as electrode distance and electrolyte resistance, and the temperature of the electrolyte and aluminum liquid. It does not require manual intervention, can eliminate the interference of human error, save manpower, improve work efficiency, and is easy to use. It can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for measuring the liquid level height of an aluminum electrolytic cell, comprising an electric push rod mounted on an external support and a rope displacement sensor for detecting the elongation of the electric push rod. The telescopic end of the electric push rod is provided with a measuring sleeve, and the bottom of the measuring sleeve is provided with a measuring probe. The measuring probe is connected to the anode busbar through a wire assembly.

[0007] As a preferred embodiment of this utility model, a connecting plate is provided on the side of the telescopic end of the electric push rod, and the pull rope of the pull rope displacement sensor is connected to the connecting plate.

[0008] As a preferred embodiment of this utility model, the conductor assembly includes a measuring conductor and a connecting conductor. The measuring conductor is located inside the measuring sleeve and is electrically connected to the measuring probe and the connecting conductor. The end of the connecting conductor away from the measuring conductor is electrically connected to the anode busbar.

[0009] As a preferred embodiment of this invention, a voltmeter is connected in series on the connecting wire.

[0010] As a preferred embodiment of this utility model, the measuring sleeve has an insulating layer inside that covers the measuring wire.

[0011] As a preferred embodiment of this invention, a thermocouple is mounted and fixed on the measuring probe.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The aluminum electrolytic cell liquid level measuring device of this utility model can detect the electrolyte level and aluminum liquid level, as well as parameters such as electrode distance and electrolyte resistance, and detect the temperature of electrolyte and aluminum liquid. It does not require manual intervention, can eliminate the interference of human error, save manpower, improve work efficiency, and is easy to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model in use;

[0016] Figure 3 This is a flowchart illustrating the data acquisition and network communication process involved in this utility model.

[0017] In the diagram: 1. Cable displacement sensor, 2. Electric push rod, 21. Connecting plate, 3. Measuring sleeve, 31. Insulation layer, 4. Measuring wire, 41. Measuring probe, 42. Thermocouple, 5. Connecting wire, 51. Voltmeter, 6. Anode busbar. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution: an aluminum electrolysis cell liquid level measuring device, including an electric push rod 2 mounted on an external support and a rope displacement sensor 1 for detecting the elongation of the electric push rod 2. The telescopic end of the electric push rod 2 is provided with a measuring sleeve 3, and the bottom of the measuring sleeve 3 is provided with a measuring probe 41. The measuring probe 41 is connected to the anode busbar 6 through a wire assembly. The electric push rod 2 pushes the measuring probe 41 to move through the measuring sleeve 3, and the rope displacement sensor 1 detects the moving distance of the measuring probe 41.

[0020] Furthermore, a connecting plate 21 is provided on the side of the telescopic end of the electric push rod 2, and the pull rope of the pull rope displacement sensor 1 is connected to the connecting plate 21. The extension of the electric push rod 2 is detected by the pull rope displacement sensor 1.

[0021] Furthermore, the lead assembly includes a measuring lead 4 and a connecting lead 5. The measuring lead 4 is located inside the measuring sleeve 3 and is electrically connected to the measuring probe 41 and the connecting lead 5. The end of the connecting lead 5 away from the measuring lead 4 is electrically connected to the anode busbar 6.

[0022] Furthermore, a voltmeter 51 is connected in series on the connecting wire 5.

[0023] Furthermore, the measuring sleeve 3 has an insulating layer 31 inside that covers the measuring wire 4.

[0024] Furthermore, a thermocouple 42 is mounted and fixed on the measuring probe 41 for temperature detection.

[0025] The pull rope displacement sensor 1, electric push rod 2, voltmeter 51, thermocouple (42) and other components used in this utility model are all commonly used electronic components in the prior art. Their working methods and circuit structures are known technologies and will not be described in detail here.

[0026] When using:

[0027] like Figure 2 As shown, point A is the electrolyte surface, point B is the point inside the electrolyte, point C is the point at the interface between the electrolyte and aluminum moisture, point D is the upper edge of the electrolytic cell shell and the initial position of the measuring device, which is a fixed value f, and point E is the distance from point E on the upper surface of the cathode carbon block of the aluminum electrolytic cell to the initial position of the measuring device, which is also a fixed value z.

[0028] The anode busbar 6 is one of the anode aluminum conductor parts of the aluminum electrolysis cell. The voltage value from it to the anode carbon block is constant during the measurement. Therefore, the anode busbar 6, the anode guide rod and the anode carbon block are regarded as a single anode conductor.

[0029] When the measuring probe 41 does not enter the electrolyte surface, the voltage value is V0=0 and the displacement value is H0;

[0030] When the measuring probe 41 moves to the electrolyte surface at point A, the device measures the voltage V1 between point A and the anode carbon block. At the same time, the rope displacement sensor 1 transfers the displacement to the PLC, and the PLC controller records a displacement H1.

[0031] As the measuring probe 41 continues to descend to point B, the distance between the measuring probe 41 and the anode carbon block remains unchanged. The resistance of the anode carbon block is much smaller than that of the electrolyte, and the change in the thickness of the anode carbon block can be ignored. Therefore, the voltage value remains relatively stable.

[0032] When the measuring probe 41 descends beyond point B, the thickness of the electrolyte in the circuit will continue to increase as the measuring probe 41 continues to descend. At this time, the voltage will rise significantly, and there will be an inflection point W1 relative to the voltage value during point B, corresponding to voltage V2 and displacement value H2.

[0033] When the measuring probe 41 continues to move to point C, the electrolyte thickness in the circuit will stabilize at the thickness from the bottom of the anode to the surface of the molten aluminum. At this time, the measuring probe 41 continues to move downward, and the voltage remains unchanged. When the probe contacts the molten aluminum at point C, the voltage will reach an inflection point W2, corresponding to voltage V3 and displacement value H3.

[0034] The displacement detected by the rope displacement sensor 1 is connected to the PLC control system. The voltage values ​​at each position measured by the detection device are collected by the voltage acquisition module and then connected to the PLC control system. The PLC control system performs programming calculations and finally displays the position results on the HMI touch screen or sends them to the computer host system.

[0035] The calculation process is as follows:

[0036] The difference between H3 and H2 is the height from point B to point C, which is the polar distance height.

[0037] The difference between H3 and H1 is the distance from point A to point C, which is the height of the electrolyte level.

[0038] The difference between z-H3 is the height of the aluminum level;

[0039] As the measuring probe 41 travels from point B to point C, the voltage increases with the thickness of the electrolyte in the circuit. Therefore, according to Ohm's law, (V3-V2) / (H3-H2) is the resistance of the electrolyte.

[0040] In addition, by simultaneously fixing a thermocouple 42 to the measuring probe 41, the temperature T of the electrolyte can be measured via the thermocouple 42 when the measuring device performs position measurement. 电解质 The temperature T of the molten aluminum 铝液 .

[0041] Data acquisition for this device: After installation, pressure measurement wires are led from the tail end of the measuring probe 41, the anode busbar 6, and the cathode steel rod, respectively, and connected to the voltage measurement module. The measurement module acquires the data, converts it into MODBUS TCP protocol, connects it to the PLC control system, and performs programming calculations on the data. At the same time, the measuring cables of the pull rope displacement sensor 1 and the thermocouple 42 are connected to the PLC control system. Programming, calculation, and output are performed in the PLC control system, and then the data is connected to the touch screen and the host computer through the communication network.

[0042] Configure the system on the on-site touchscreen to display measurement results, which can then be used to guide adjustments to the production process.

[0043] A data configuration interface is established on the host computer to generate data display reports, record data history, and synchronously generate historical data curves to guide process technicians in analyzing and adjusting production parameters.

[0044] This invention can detect electrolyte levels and molten aluminum levels, as well as parameters such as electrode distance and electrolyte resistance, and the temperature of the electrolyte and molten aluminum. It requires no manual intervention, eliminates interference from human error, saves manpower, improves work efficiency, and is easy to use.

[0045] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the liquid level in an aluminum electrolysis cell, comprising an electric push rod (2) mounted on an external support and a rope displacement sensor (1) for detecting the elongation of the electric push rod (2), characterized in that: The telescopic end of the electric push rod (2) is provided with a measuring sleeve (3), and the bottom of the measuring sleeve (3) is provided with a measuring probe (41). The measuring probe (41) is connected to the anode busbar (6) through a wire assembly.

2. The aluminum electrolytic cell liquid level measuring device according to claim 1, characterized in that: The electric push rod (2) has a connecting plate (21) on the side of its telescopic end, and the pull rope of the pull rope displacement sensor (1) is connected to the connecting plate (21).

3. The aluminum electrolytic cell liquid level measuring device according to claim 1, characterized in that: The lead assembly includes a measuring lead (4) and a connecting lead (5). The measuring lead (4) is located inside the measuring sleeve (3) and is electrically connected to the measuring probe (41) and the connecting lead (5). The end of the connecting lead (5) away from the measuring lead (4) is electrically connected to the anode busbar (6).

4. The aluminum electrolytic cell liquid level measuring device according to claim 3, characterized in that: A voltmeter (51) is connected in series on the connecting wire (5).

5. The aluminum electrolytic cell liquid level measuring device according to claim 3, characterized in that: The measuring sleeve (3) has an insulating layer (31) inside that covers the measuring wire (4).

6. The aluminum electrolytic cell liquid level measuring device according to claim 1, characterized in that: A thermocouple (42) is fixedly mounted on the measuring probe (41).

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