Automatic inspection system for tank bottom of electrolytic aluminum factory

Abstract

The invention discloses an automatic inspection system for a tank bottom of an electrolytic aluminum factory, and relates to the technical field of automatic inspection. Comprising a robot body, a data acquisition unit, a charging unit, a communication unit and a monitoring unit, a liftable holder is arranged at the upper end of the robot body, and the data acquisition unit is mounted on the holder; the data acquisition unit comprises an infrared temperature measurement assembly and a camera; the robot body runs to the inspection site according to the planned path, performs infrared temperature measurement on the bottom of the electrolytic bath, obtains an infrared image of an inspection area corresponding to the inspection site, and sends the infrared image to the monitoring unit through the communication unit; the monitoring unit analyzes the infrared image, judges whether the temperature of each detection point is abnormal or not, and automatically gives an alarm when the temperature is abnormal; a task report is automatically generated after one-time inspection is completed, and is stored in a platform server for operation and maintenance personnel to check. The high-temperature and high-magnetic-field environment at the bottom of the electrolytic aluminum tank can be handled, and safe and normal operation of inspection equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of automatic inspection, and in particular to an automatic inspection system for the bottom of a tank in an aluminum electrolytic plant. Background Art

[0002] The electrolytic aluminum cell is the core equipment in the electrolytic aluminum production process, and its operating status directly affects the efficiency and safety of the entire production process. Due to the special working environment of the electrolytic aluminum cell, there are harsh conditions such as high temperature, strong magnetic field, corrosive gas, etc., manual inspection is not only labor-intensive and inefficient, but also poses a potential threat to the personal safety of workers. The existing manual inspection has problems such as great safety hazards, harsh working environment, low detection efficiency, difficulty in data recording, and insufficient preventive maintenance.

[0003] In response to the above problems, robots have been developed that can replace manual inspections by carrying instruments and sensors. They have realized autonomous inspections by robots, image acquisition of electrolytic cell conditions, and infrared temperature measurement of the bottom of the cell, greatly improving the efficiency and effectiveness of inspections. However, the existing robot inspection system still has many problems when dealing with electrolytic aluminum cell inspections, especially the bottom of the electrolytic aluminum cell inspections: First, the infrared radiation temperature measurement device is easily damaged and fails in the high temperature and high magnetic field environment of the bottom of the electrolytic aluminum cell; second, the high temperature interference of the bottom of the electrolytic aluminum cell, the robot cannot achieve efficient heat dissipation due to equipment space reasons, and the fan heat dissipation easily forms a hot air flow around the robot, forming a thermal background interference, resulting in a large deviation in temperature correction.

[0004] Therefore, how the robot can achieve stable infrared temperature measurement and cooling in the existing electrolytic aluminum tank bottom inspection is a problem that the existing automatic inspection system needs to solve. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned prior art, the present invention provides an automatic inspection system for the bottom of an aluminum electrolytic plant tank, which can cope with the high temperature and high magnetic field environment of the bottom of an aluminum electrolytic tank and ensure the safe and normal operation of the inspection equipment; in particular, the use of a split structure for the infrared temperature measurement component can greatly improve.

[0006] The specific technical solutions are as follows:

[0007] An automatic inspection system for the bottom of an electrolytic aluminum plant, comprising a robot body, a data acquisition unit, a charging unit, a communication unit and a monitoring unit. A liftable pan-tilt is provided on the upper end of the robot body, and the data acquisition unit is installed on the pan-tilt; the data acquisition unit comprises an infrared temperature measurement component and a camera; the robot body drives to the inspection site according to a planned path, performs infrared temperature measurement on the bottom of the electrolytic cell, obtains an infrared image of the inspection area corresponding to the inspection site, and sends it to the monitoring unit through the communication unit; the monitoring unit analyzes the infrared image, determines whether the temperature of various detection points is abnormal, and automatically issues an alarm when an abnormality occurs; after completing an inspection, a task report is automatically generated and stored in a platform server for operation and maintenance personnel to view;

[0008] The infrared temperature measurement component includes a heat-insulating shell, an optical lens, a microlens array, an optical fiber bundle, an infrared detector, and an infrared circuit module; the heat-insulating shell is installed on the pan-tilt platform, and the optical lens, the microlens array, and the optical fiber bundle are installed in the shell from front to back in sequence, one end of the optical fiber bundle is connected with the microlens array to form an optical path transmission connection, and the other end of the optical fiber bundle is connected to the infrared detector installed in the electromagnetic shielding room inside the robot body, and the infrared detector is connected to the communication unit through the infrared circuit module; the electromagnetic shielding room is connected with a cooling unit.

[0009] In the above solution, the heat-insulating shell includes an aluminum alloy shell, and ceramic fiber material layers are provided inside and outside the aluminum alloy shell.

[0010] In the above scheme, an aerogel layer and a heat-insulating outer layer are sequentially provided outside the optical fiber bundle.

[0011] Furthermore, in the above solution, the distance between the optical lens and the microlens array is adjustable.

[0012] In the above scheme, the electromagnetic shielding room includes a heat insulation layer and an electromagnetic shielding layer from the inside to the outside.

[0013] Furthermore, in the above scheme, the cooling unit includes a coolant tank, a recovery tank, a circulation pump, an inner cooling pipeline, an outer cooling pipeline, an electromagnetic three-way valve, a first electromagnetic switch valve and a second electromagnetic switch valve; the inner cooling pipeline is arranged in a surrounding manner inside the electromagnetic shielding room, and both ends are connected to the coolant tank through the first electromagnetic switch valve, the middle part of the inner cooling pipeline is connected to one end of the outer cooling pipeline through the electromagnetic three-way valve, and the other end of the outer cooling pipeline is connected to the recovery tank through the second electromagnetic switch valve; the circulation pump is arranged on the inner cooling pipeline; the outer cooling pipeline is arranged in a surrounding manner outside the electromagnetic shielding room, the coolant tank and the recovery tank are arranged in the robot body, and the coolant tank is used to hold pre-cooled coolant; the inner cooling pipeline is arranged at a position higher than the inner cooling pipeline, the coolant tank is arranged at a position higher than the outer cooling pipeline, and the recovery tank is arranged at a position lower than the outer cooling pipeline.

[0014] The above scheme further includes a coolant replacement unit, which includes a pre-storage tank, a refrigeration unit and a quick-connect interface. The refrigeration unit is used to cool the coolant in the pre-storage tank. The quick-connect interface is connected to the pre-storage tank and is used to connect to the coolant tank to add coolant and to connect to the recovery tank to recover coolant. The coolant replacement unit is arranged at the charging unit.

[0015] In the above solution, the microlens array and the optical fiber bundle are bonded by optical glue.

[0016] The above solution further includes a self-calibration module, which is a standard black body radiation source with a known temperature installed on one side of the charging unit through a bracket.

[0017] Furthermore, in the above scheme, the charging unit is arranged at the starting point and the middle point of the electrolytic cell inspection.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The robot body of the present invention moves to the inspection site according to the planned path, and obtains the infrared image of the inspection area with the help of the infrared temperature measurement component and camera in the data acquisition unit. The monitoring unit then conducts in-depth analysis of the image and accurately determines whether the temperature of each detection point is abnormal. Once an abnormality occurs, an automatic alarm is immediately issued, which greatly improves the timeliness of fault detection. In addition, a task report is automatically generated after each inspection and stored in the platform server, which is convenient for operation and maintenance personnel to view at any time, so that the operation status of the entire electrolytic aluminum plant tank bottom is clear at a glance.

[0020] The present invention realizes unmanned inspection, intelligent alarm and visual management at the project scene work site through scene-based robot deployment, avoids the problems of untimely, inadequate, inaccurate and difficult traceability that may occur during manual inspection, reduces the labor intensity of manual inspection, reduces the number of manual inspections, and improves the safety of equipment operation and operation and maintenance efficiency in the target inspection area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a functional structure diagram of the present invention;

[0022] Figure 2 It is the overall schematic diagram of the robot body;

[0023] Figure 3 It is a partial structural schematic diagram of the infrared temperature measurement component of the present invention;

[0024] Figure 4 is a schematic diagram of the cooling unit structure;

[0025] Figure 5 It is a schematic diagram of the inspection path of the present invention.

[0026] In the accompanying drawings, 1-robot body, 2-infrared temperature measurement component, 3-insulated shell, 4-optical lens, 5-microlens array, 6-optical fiber bundle, 7-charging unit, 8-coolant tank, 9-recovery tank, 10-circulating pump, 11-internal cooling pipeline, 12-external cooling pipeline, 13-electromagnetic three-way valve, 14-first electromagnetic switch valve, 15-second electromagnetic switch valve. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the invention in conjunction with the accompanying drawings to make the objectives, technical solutions and technical effects of the invention more clearly presented.

[0028] like Figure 1-3 As shown, the present invention discloses an automatic inspection system for the bottom of an electrolytic aluminum plant, including a robot body 1, a data acquisition unit, a charging unit 7, a communication unit and a monitoring unit. A liftable pan-tilt is provided at the upper end of the robot body 1, and the data acquisition unit is installed on the pan-tilt; the data acquisition unit includes an infrared temperature measurement component 2 and a camera. The robot body 1 drives to the inspection site according to the planned path, performs infrared temperature measurement on the bottom of the electrolytic cell, obtains an infrared image of the inspection area corresponding to the inspection site, and sends it to the monitoring unit through the communication unit. The monitoring unit analyzes the infrared image to determine whether the temperature of various detection points is abnormal, and automatically alarms when an abnormality occurs; after completing an inspection, a task report is automatically generated and stored in the platform server for operation and maintenance personnel to view. Among them, the infrared temperature measurement component 2 includes a heat-insulating shell 3, an optical lens 4, a microlens array 5, an optical fiber bundle 6, an infrared detector, and an infrared circuit module. The heat-insulating housing 3 is installed on the pan-tilt platform, and the optical lens 4, the microlens array 5 and the optical fiber bundle 6 are installed in the housing from front to back in sequence. One end of the optical fiber bundle 6 is connected to the microlens array 5 to form an optical path transmission connection, and the other end of the optical fiber bundle 6 is connected to the infrared detector installed in the electromagnetic shielding room in the robot body 1. The infrared detector is connected to the communication unit through an infrared circuit module. The cooling unit is connected in the electromagnetic shielding room. Among them, the microlens array 5 and the optical fiber bundle 6 are bonded by optical glue.

[0029] In the above scheme, the robot body 1 is used as a mobile carrier, and the upper liftable pan-tilt is equipped with a data acquisition unit to adjust the angle to collect the image information of the bottom of the electrolytic cell. In the infrared temperature measurement component 2, the heat-insulating shell 3 protects the internal optical components, the optical lens 4 collects infrared radiation, which is further focused by the microlens array 5, and then transmitted to the infrared detector in the electromagnetic shielding room by the optical fiber bundle 6. The infrared detector converts the optical signal into an electrical signal, which is processed by the infrared circuit module and sent through the communication unit. The electromagnetic shielding room prevents external electromagnetic interference, and the cooling unit cools it down to ensure the stable operation of each component. Based on the structural setting of the infrared temperature measurement component 2, specifically the setting of the microlens array 5 and the optical fiber bundle 6, the infrared detector can be placed in an electromagnetic shielding room that is isolated from high magnetic fields and high temperature environments, while avoiding the situation where the magnetic isolation and temperature isolation components are simply stacked on the pan-tilt, making the structure complicated and not conducive to maintenance.

[0030] In the above scheme, the robot body 1 uses a wheeled inspection robot that is resistant to strong magnetic environments, and is equipped with a pan-tilt head and sensors for information collection and processing. The robot body 1 has excellent obstacle crossing and passing performance, and can better complete inspection tasks and communication interaction functions.

[0031] The communication unit includes a switch, a wireless AP base station, etc. The data collected by the robot body 1 is transmitted to the wireless AP base station built on site by wireless transmission. The base station converts and processes the received data information and transmits it to the remote background server through optical fiber. The monitoring unit converts and processes the received data information according to different data algorithms, and finally presents the most intuitive data information in the background for users to view.

[0032] The charging unit 7 includes an automatic charging pile and a power distribution cabinet. The automatic charging pile is used for automatic charging of the robot body 1. The robot body 1 will automatically identify the charging pile and dock with the charging pile for automatic charging. After the robot body 1 receives the automatic charging instruction, the brush on the robot body 1 will automatically connect to the battery and dock with the charger. After the docking is completed, the charger detects that the brush of the robot body 1 is connected and starts to supply power.

[0033] Here, in order to better isolate the external heat input, protect the internal optical and electronic components from high temperature interference, and ensure the accuracy of data collection. The heat-insulating shell 3 includes an aluminum alloy shell, and ceramic fiber material layers are arranged inside and outside the aluminum alloy shell. Among them, an aerogel layer and a heat-insulating outer layer are arranged outside the optical fiber bundle 6 in sequence. This allows the optical fiber bundle 6 to work normally in a complex thermal environment, reduce the risk of signal attenuation, ensure accurate and rapid transmission of infrared image data, and improve the detection accuracy of the inspection system.

[0034] Among them, in order to adapt to different inspection needs, the optical focal length is flexibly adjusted according to different areas and different working conditions in the electrolytic cell to obtain clearer and more accurate infrared images. The distance between the optical lens 4 and the microlens array 5 is adjustable. The electromagnetic shielding room includes a heat insulation layer and an electromagnetic shielding layer from the inside to the outside. This allows the components in the electromagnetic shielding room to operate stably, reduces the impact of electromagnetic noise on the temperature detection signal, improves data credibility, and allows the monitoring unit to make more accurate temperature abnormality judgments.

[0035] like Figure 4 As shown, the cooling unit includes a coolant tank 8, a recovery tank 9, a circulation pump 10, an inner cooling pipeline 11, an outer cooling pipeline 12, an electromagnetic three-way valve 13, a first electromagnetic switch valve 14, and a second electromagnetic switch valve 15. The inner cooling pipeline 11 is arranged in an electromagnetic shielding room, and both ends are connected to the coolant tank 8 through the first electromagnetic switch valve 14. The middle of the inner cooling pipeline 11 is connected to one end of the outer cooling pipeline 12 through the electromagnetic three-way valve 13, and the other end of the outer cooling pipeline 12 is connected to the recovery tank 9 through the second electromagnetic switch valve 15; the circulation pump 10 is arranged on the inner cooling pipeline 11. The outer cooling pipeline 12 is arranged in an outer side of the electromagnetic shielding room, and the coolant tank 8 and the recovery tank 9 are arranged in the robot body 1. The coolant tank 8 is used to hold the pre-cooled coolant. The setting of the cooling unit is to efficiently take away the heat in the electromagnetic shielding room, accurately control the internal temperature, ensure that the infrared detector works at a suitable temperature, and maintain the best performance. By setting the inner cooling pipeline 11 and the outer cooling pipeline 12, the cooling system can flexibly allocate the coolant according to the actual working conditions, dissipate the heat quickly, avoid the performance degradation or even damage of the components due to overheating, and ensure the long-term stable operation of the inspection system. Among them, the inner cooling pipeline 11 and the outer cooling pipeline 12 are respectively provided with temperature sensors for measuring the temperature in the pipeline. Of course, temperature sensors can also be set inside and outside the electromagnetic shielding room to meet the monitoring of the equipment environment temperature. Here, the inner cooling pipeline 11 is set higher than the inner cooling pipeline 11, the coolant tank 8 is set higher than the outer cooling pipeline 12, and the recovery tank 9 is set lower than the outer cooling pipeline 12, so that the coolant can use gravity to flow in the direction of the coolant tank 8-inner cooling pipeline 11-outer cooling pipeline 12-recovery tank 9, reducing the setting of circulation equipment.

[0036] When in use, first check that each valve is in a closed state, first open the electromagnetic three-way valve 13 to connect the inner cooling pipeline 11 and the outer cooling pipeline 12, open the first electromagnetic switch valve 14 to fill the inner cooling pipeline 11 and the outer cooling pipeline 12 with coolant, then close the electromagnetic three-way valve 13 to disconnect the inner cooling pipeline 11 and the outer cooling pipeline 12; start the circulation pump 10 to fully fill the inner cooling pipeline 11 with coolant, and close the first electromagnetic switch valve 14. At this time, the inner cooling pipeline 11 continuously circulates the coolant, performs heat exchange in the electromagnetic shielding room to achieve uniform cooling of the electromagnetic shielding room as a whole. The outer side of the electromagnetic shielding room is cooled by heat exchange through the outer cooling pipeline 12. The temperature sensors in the inner cooling pipeline 11 and the outer cooling pipeline 12 are used to control whether to add the coolant, and the order of giving priority to the inner cooling pipeline 11 and then the outer cooling pipeline 12 is given. Specifically, when the temperature in the inner cooling pipeline 11 is higher than the set temperature, the second electromagnetic switch valve 15 is first opened to allow the coolant to flow into the recovery tank 9, the second electromagnetic switch valve 15 is closed, the electromagnetic three-way valve 13 is opened to allow the coolant to flow into the outer cooling pipeline 12, and finally the electromagnetic three-way valve 13 is closed, and the first electromagnetic switch valve 14 is opened to fill the inner cooling pipeline 11 with new coolant. Among them, the coolant pre-cooling temperature is zero degrees Celsius to ensure that the electromagnetic shielding room is cooled for a long time; the circulation temperature of the inner cooling pipeline 11 is 20°C, and the circulation temperature of the outer cooling pipeline 12 is not set. The above-mentioned setting can maximize the use of coolant heat dissipation. Since the coolant temperature in the outer cooling pipeline 12 is greater than 20°C, there is no need to consider the problem of water vapor condensation; and the electromagnetic shielding room is basically in a closed space, and there is no problem of water vapor condensation. Of course, water vapor condensation can be solved by using desiccant, which is explained in detail here.

[0037] In order to cooperate with the implementation of the above scheme, it also includes a coolant replacement unit, which includes a pre-storage tank, a refrigeration unit and a quick-connect interface. The refrigeration unit is used to cool the coolant in the pre-storage tank. The quick-connect interface is connected to the pre-storage tank, and is used to connect the coolant tank 8 to add coolant and connect the recovery tank 9 to recover coolant; the coolant replacement unit is arranged at the charging unit 7. In this way, the inspection system can regularly update the coolant without complicated operations, reduce the heat dissipation problem caused by the degradation of the coolant performance, ensure the stable operation of the entire system, and reduce the difficulty of operation and maintenance. The quick-connect interface is specifically automatically connected with the docking pipes on the coolant tank 8 and the recovery tank 9 to fill and recover the coolant. The order is to fill the coolant first to fill the coolant tank 8; then connect the recovery tank 9 to recover the coolant, and the refrigeration unit works to cool the coolant to the set temperature.

[0038] In order to regularly calibrate the infrared temperature measurement component 2, eliminate temperature measurement errors caused by component aging, environmental changes and other factors, and ensure the accuracy of the detection data. A self-calibration module is also included, which is a standard black body radiation source with a known temperature installed on one side of the charging unit 7 through a bracket. In this way, the inspection system can always grasp the temperature measurement accuracy of the infrared temperature measurement component 2, correct the deviation in time, and allow the monitoring unit to make reliable temperature abnormality judgments based on accurate data, thereby improving the reliability of fault warning.

[0039] In the above embodiment, the charging unit 7 is arranged at the starting point and the middle point of the electrolytic cell inspection. This enables the robot to efficiently complete the entire inspection process, reduce the time wasted due to charging and waiting, ensure the inspection task is executed on time and completely, and improve the operation and maintenance management efficiency of the electrolytic aluminum plant.

[0040] Take a 500KVA aluminum electrolysis plant as an example. It has 8 electrolysis areas, each with 37-38 electrolysis cells, for a total of 300. The robot is used to perform inspection tasks in units of 38 cells in an electrolysis area. The inspection area is mainly centered on the bottom of the aluminum electrolysis cell. The robot body 1 inspects back and forth along the planned path. Figure 5 As shown by the arrow lines shown, the route is optimized and the inspection coverage is maximized.

[0041] First, before the robot body 1 starts from the starting point of the electrolytic cell inspection according to the preset planning path, it first ensures that the power is sufficient in the charging unit 7, updates the coolant and calibrates the infrared temperature measurement component 2. Then it starts from the inspection starting point and drives to each inspection site; after arriving at the site, the data acquisition unit on the pan-tilt head starts working, and the infrared temperature measurement component 2 and the camera collect information at the same time to obtain the infrared image and actual video image of the inspection area; then, the collected information is transmitted to the monitoring unit in real time through the communication unit; the monitoring unit quickly analyzes the infrared image to determine whether the temperature is abnormal, and automatically alarms if it is abnormal; after completing an inspection process, the system automatically generates a task report and stores it in the platform server.

[0042] The above are only preferred feasible embodiments of the present invention and are not intended to limit the scope of the patent application of the present invention. All equivalent changes, equivalent substitutions or modified changes completed within the technical spirit and principles suggested by the present invention should be included in the patent protection scope covered by the present invention.

Claims

1. An automatic inspection system for the bottom of an electrolytic aluminum plant, comprising a robot body, a data acquisition unit, a charging unit, a communication unit and a monitoring unit. The upper end of the robot body is provided with a liftable pan-tilt platform, and the data acquisition unit is installed on the pan-tilt platform; the data acquisition unit comprises an infrared temperature measurement component and a camera; the robot body drives to the inspection site according to the planned path, performs infrared temperature measurement on the bottom of the electrolytic cell, obtains an infrared image of the inspection area corresponding to the inspection site, and sends it to the monitoring unit through the communication unit; the monitoring unit analyzes the infrared image, determines whether the temperature of various detection points is abnormal, and automatically alarms when an abnormality occurs; after completing an inspection, a task report is automatically generated and stored in the platform server for operation and maintenance personnel to view; it is characterized in that: The infrared temperature measurement component includes a heat-insulating shell, an optical lens, a microlens array, an optical fiber bundle, an infrared detector, and an infrared circuit module; the heat-insulating shell is installed on the pan-tilt platform, and the optical lens, the microlens array, and the optical fiber bundle are installed in the shell from front to back in sequence, one end of the optical fiber bundle is connected with the microlens array to form an optical path transmission connection, and the other end of the optical fiber bundle is connected to the infrared detector installed in the electromagnetic shielding room inside the robot body, and the infrared detector is connected to the communication unit through the infrared circuit module; the electromagnetic shielding room is connected with a cooling unit.

2. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: The heat-insulating shell comprises an aluminum alloy shell, and ceramic fiber material layers are arranged inside and outside the aluminum alloy shell.

3. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: An aerogel layer and a heat-insulating outer layer are sequentially arranged outside the optical fiber bundle.

4. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: The distance between the optical lens and the microlens array is adjustable.

5. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: The electromagnetic shielding room includes a heat insulation layer and an electromagnetic shielding layer from the inside to the outside.

6. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: The cooling unit includes a coolant tank, a recovery tank, a circulation pump, an inner cooling pipeline, an outer cooling pipeline, an electromagnetic three-way valve, a first electromagnetic switch valve and a second electromagnetic switch valve; the inner cooling pipeline is arranged in a surrounding manner inside the electromagnetic shielding room, and both ends are connected to the coolant tank through the first electromagnetic switch valve, the middle part of the inner cooling pipeline is connected to one end of the outer cooling pipeline through the electromagnetic three-way valve, and the other end of the outer cooling pipeline is connected to the recovery tank through the second electromagnetic switch valve; the circulation pump is arranged on the inner cooling pipeline; the outer cooling pipeline is arranged in a surrounding manner outside the electromagnetic shielding room, the coolant tank and the recovery tank are arranged in the robot body, and the coolant tank is used to hold pre-cooled coolant; the inner cooling pipeline is arranged at a position higher than the inner cooling pipeline, the coolant tank is arranged at a position higher than the outer cooling pipeline, and the recovery tank is arranged at a position lower than the outer cooling pipeline.

7. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 6 is characterized by: It also includes a coolant replacement unit, which includes a pre-storage tank, a refrigeration unit and a quick-connect interface. The refrigeration unit is used to cool the coolant in the pre-storage tank. The quick-connect interface is connected to the pre-storage tank and is used to connect to the coolant tank to add coolant and to connect to the recovery tank to recover coolant. The coolant replacement unit is provided at the charging unit.

8. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: The microlens array and the optical fiber bundle are bonded by optical glue.

9. The automatic inspection system for the bottom of an aluminum electrolytic plant according to claim 1 is characterized by: It also includes a self-calibration module, which is a standard black body radiation source with a known temperature installed on one side of the charging unit through a bracket.

10. An automatic inspection system for the bottom of an aluminum electrolytic plant according to any one of claims 1 to 9, characterized in that: The charging unit is arranged at the starting point and the middle point of the electrolytic cell inspection.

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