High-precision anode bus stroke detection device

Abstract

A high-precision anode bus stroke detection device relates to the technical field of signal acquisition in light metallurgy and comprises a pull rope type displacement sensor, a free end of a flexible steel wire rope of the pull rope type displacement sensor is connected with an anode bus through a first insulation assembly, and the pull rope type displacement sensor is connected with an upper steel structure of an electrolytic bath through a second insulation assembly. A second signal cable of the pull rope type displacement sensor is connected with a wiring terminal of the trough upper portion junction box, and the pull rope type displacement sensor is connected with the trough control machine through a first signal cable. According to the utility model, the pull rope type displacement sensor is connected with the anode bus, so that the position of the anode bus can be acquired in real time, and better process control precision and cell condition analysis elements are provided for an aluminum electrolysis cell control system.

Description

Technical Field

[0001] The utility model relates to the technical field of signal acquisition in light metallurgy, in particular to a high-precision anode busbar stroke detection device. Background Art

[0002] The aluminum electrolysis industry uses large prebaked cells for electrolysis production. The control system of the aluminum electrolysis cell, that is, the cell control system, calculates the alumina concentration and performs the pole distance control based only on the cell voltage and series current. When controlling the pole distance, the reference variables are very limited and the accuracy is not high. Since there is no accurate feedback of the anode bus position, the size of the pole distance can only be roughly judged by the voltage. In theory, the higher the voltage, the larger the pole distance, but due to the complex working conditions in the electrolytic cell, the voltage level cannot fully and accurately reflect the size of the pole distance. Sometimes the voltage rises due to other reasons, but the pole distance does not change. When the pole distance is controlled by tracking the voltage, there will be a phenomenon of pressure or misadjustment of the pole distance, which will seriously affect the stability of the electrolytic cell production and even cause safety accidents. Therefore, it is particularly important to measure the precise anode bus position and feedback it to the cell control system to participate in the control. Utility Model Content

[0003] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a high-precision anode busbar stroke detection device. By adopting a pull-rope displacement sensor to connect the anode busbar, the position of the anode busbar can be collected in real time, providing better process control accuracy and cell condition analysis elements for the aluminum electrolytic cell control system.

[0004] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0005] A high-precision anode busbar stroke detection device comprises a draw-rope displacement sensor, wherein the free end of the flexible steel wire rope of the draw-rope displacement sensor is connected to the anode busbar through a first insulating component, the draw-rope displacement sensor is connected to the upper steel structure of the electrolytic cell through a second insulating component, the second signal cable of the draw-rope displacement sensor is connected to the wiring terminal of the upper junction box of the cell, and the draw-rope displacement sensor is connected to the cell control machine through the first signal cable.

[0006] Furthermore, the first insulating component is an L-shaped insulating member, the outer side of one side of the L-shaped insulating member is fixedly connected to the anode busbar, and the other side is fixedly connected to the free end of the flexible steel wire rope, so that the linear motion of the flexible steel wire rope is consistent with the motion axis of the anode busbar.

[0007] Furthermore, the second insulating component is a flat insulating member, one side of which is fixedly connected to the upper steel structure of the electrolytic cell, and the other side of which is fixed to the pull-rope displacement sensor.

[0008] Furthermore, the measuring range of the pull-wire displacement sensor is 500 mm and the accuracy is 0.1 mm.

[0009] Furthermore, the transmission signal of the pull-wire displacement sensor is a current signal of 4-20 mA, and the corresponding anode bus position is 0-500 mm.

[0010] The beneficial effects of the utility model are:

[0011] The utility model discloses a high-precision anode busbar travel detection device. By connecting the anode busbar with a pull-rope displacement sensor, the position of the anode busbar can be collected in real time with an accuracy of 0.1mm, and the collected signal can be transmitted to the corresponding slot control machine. The slot control machine can accurately control the pole distance of the electrolytic cell through the collected position signal. When the slot control machine performs the anode raising / lowering action each time, in addition to the reference voltage, the real-time position of the busbar can also be referenced, which improves the control process accuracy and efficiency; at the same time, it has an early warning and prevention effect on accidents such as hoist reverse phase, anode lifting and lowering misoperation, and furnace leakage that occur during the aluminum electrolysis production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the structure of a high-precision anode busbar stroke detection device.

[0013] In the figure: 1 is the anode busbar, 2 is the first insulating component, 3 is the flexible steel wire rope, 4 is the pull-rope type displacement sensor, 5 is the second insulating component, 6 is the upper steel structure of the electrolytic cell, 7 is the upper junction box of the cell, 8 is the first signal cable, 9 is the cell control machine, 10 is the second signal cable, and 11 is the wiring terminal. DETAILED DESCRIPTION

[0014] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0015] like Figure 1 As shown, the utility model provides a high-precision anode busbar stroke detection device, including a pull-rope displacement sensor 4, which is based on converting mechanical motion into an electrical signal that can be measured, recorded or transmitted. The sensor includes a highly flexible composite steel wire, namely a flexible steel wire rope 3, which is wound on a drum through a spring, and the drum is directly connected to a precision rotary encoder. When the flexible steel wire rope 3 is stretched or contracted, it drives the drum to rotate, and the rotary motion of the drum is then converted into an output in the form of a current signal by the precision rotary encoder, and this output signal can directly reflect the displacement of the object.

[0016] The operation mode of the drawstring displacement sensor 4 is that the sensor is installed in a fixed position and the drawstring is tied to the moving object. The linear motion of the drawstring is aligned with the axis of motion of the moving object. When the motion occurs, the drawstring stretches and contracts. An internal spring ensures that the tension of the drawstring remains constant. The threaded hub drives the precision rotary sensor to rotate and outputs a current signal proportional to the distance the drawstring moves. The displacement, direction or speed of the moving object can be obtained by measuring the output signal. The range of the drawstring displacement sensor 4 of the utility model is 500mm and the accuracy is 0.1mm.

[0017] The free end of the flexible steel wire rope 3 of the pull-rope displacement sensor 4 is connected to the anode bus 1 through the first insulating component 2. The first insulating component 2 is an L-shaped insulating component. The outer side of one side of the L-shaped insulating component is fixedly connected to the anode bus 1, and the other side is fixedly connected to the free end of the flexible steel wire rope 3, so that the linear motion of the flexible steel wire rope 3 is consistent with the motion axis of the anode bus 1. The pull-rope displacement sensor 4 is connected to the upper steel structure 6 of the electrolytic cell through the second insulating component 5. The second insulating component 5 is a flat insulating component. One side of the flat insulating component is fixedly connected to the upper steel structure 6 of the electrolytic cell, and the other side fixes the pull-rope displacement sensor 4. The second signal cable 10 of the pull-rope displacement sensor 4 is connected to the terminal 11 of the upper junction box 7 of the cell, and the second signal cable 10 is connected to the cell control machine 9 through the first signal cable 8.

[0018] The transmission signal of the pull-wire displacement sensor 4 is a current signal of 4-20 mA, and the corresponding anode bus position is 0-500 mm.

[0019] During the aluminum electrolysis production process, when the slot control machine 9 performs pole distance control, the height of the anode busbar 1 is adjusted by the motor. The pull-rope displacement sensor 4 is fixed to the second insulating component 5 by bolts, and the second insulating component 5 is installed on the upper steel structure 6 of the electrolytic cell to achieve the purpose of insulating installation. The first insulating component 2 is L-shaped and fixed to the anode busbar 1 by self-tapping screws. A small hole is opened on the upper part of the first insulating component 2, and the flexible steel wire rope 3 of the pull-rope displacement sensor 4 passes through this hole, and the steel wire rope is fixed to the first insulating plate 2 with a steel wire rope buckle. Through the above operation, it can be realized that the length of the flexible steel wire rope 3 stretched represents the height of the anode busbar 1. The second signal cable 10 is connected to the terminal 11 in the upper junction box 7 of the slot, and the second signal cable 10 transmits the signal to the slot control machine 9 corresponding to the electrolytic cell through the first signal cable 8 in the cable tray. The transmission signal is a current signal of 4-20mA, and the corresponding anode busbar position is 0-500mm.

[0020] The collected bus position data can be displayed not only on the slot control machine, but also on the host computer of the slot control system, recorded in the database, and generated into charts.

[0021] The utility model can calculate the amount of aluminum produced by the anode bus position difference before and after aluminum is produced in the electrolytic cell, and can also provide a pre-prompt for the anode bus switching operation process through the position signal information. It can also track the changes in the readings in real time during the action, and can determine whether the motor phase sequence is reversed or the lifting mechanism is faulty. The cell control system can also set a protection value, which plays a protective role when the anode bus position is too high or too low, replacing the limit switch or forming a double protection with it. The setting of the above functions improves the safety and stability of the electrolytic cell control. It can also reflect the furnace condition and achieve the purpose of accurate aluminum production through the anode bus position difference before and after aluminum is produced in the electrolytic cell.

[0022] Although the embodiments of the present invention have been shown and described above, it is understandable that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Any changes, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.

Claims

1. A high-precision anode busbar travel detection device, characterized in that: The invention comprises a pull-wire displacement sensor (4), wherein the free end of a flexible steel wire rope (3) of the pull-wire displacement sensor (4) is connected to an anode busbar (1) via a first insulating component (2), the pull-wire displacement sensor (4) is connected to an upper steel structure (6) of an electrolytic cell via a second insulating component (5), a second signal cable (10) of the pull-wire displacement sensor (4) is connected to a connection terminal (11) of a junction box (7) at the top of the cell, and the pull-wire displacement sensor (4) is connected to a cell control machine (9) via a first signal cable (8).

2. A high-precision anode busbar travel detection device according to claim 1, characterized in that: The first insulating component (2) is an L-shaped insulating member, the outer side of one side of the L-shaped insulating member is fixedly connected to the anode busbar (1), and the other side is fixedly connected to the free end of the flexible steel wire rope (3), so that the linear motion of the flexible steel wire rope (3) is consistent with the motion axis of the anode busbar (1).

3. A high-precision anode busbar travel detection device according to claim 1, characterized in that: The second insulating component (5) is a flat insulating member, one side of which is fixedly connected to the upper steel structure (6) of the electrolytic cell, and the other side of which is fixed to the pull-rope type displacement sensor (4).

4. A high-precision anode busbar travel detection device according to claim 1, characterized in that: The measuring range of the pull-wire type displacement sensor (4) is 500 mm and the accuracy is 0.1 mm.

5. A high-precision anode busbar travel detection device according to claim 1, characterized in that: The transmission signal of the pull-wire displacement sensor (4) is a current signal of 4-20 mA, and the corresponding anode bus position is 0-500 mm.

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