An electrolytic cell monitoring device

Abstract

The application relates to the technical field of electrolytic cell maintenance, in particular to an electrolytic cell monitoring device which comprises a plurality of electrolytic cells and at least two baffles, the two ends of the electrolytic cells are connected with the baffles respectively, the side, away from the electrolytic cell, of the baffle is provided with a pressure measuring device, and the device further comprises a distance measuring sensor which is installed on the side, close to the electrolytic cell, of the baffle. The electrolytic cell monitoring device provided by the application can accurately calculate the actual compression amount of the sealing gasket by monitoring the length change, real-time temperature and pressure of the alkaline electrolytic cell in combination with the thermal expansion coefficient of the pole plate, can eliminate the interference of temperature and pressure fluctuations on the state judgment of the disc spring and the sealing gasket, can make the early warning more in line with the dynamic operation law of the alkaline electrolytic cell, and can solve the defect that the artificial inspection cannot quantify the influence of temperature and pressure.

Description

Technical Field

[0001] This application relates to the field of electrolytic cell maintenance technology, specifically to an electrolytic cell monitoring device. Background Technology

[0002] Alkaline water electrolysis hydrogen production equipment has become a core piece of equipment in the green hydrogen industry chain due to its high technological maturity, cost advantage, and adaptability to large-scale hydrogen production. Among them, the alkaline electrolyzer is the core component of the equipment. During operation, due to the need to adapt to green electricity, the electrolyzer will be repeatedly stopped and started, resulting in repeated changes in temperature and pressure. This places higher stability requirements on the sealing gaskets and external pre-tensioning disc springs on the electrolyzer that are responsible for the overall sealing of the machine.

[0003] Currently, the monitoring of disc springs and gaskets mainly relies on manual inspection. Specifically, this involves observing the appearance of parts for abnormalities, such as whether the gaskets and disc springs show signs of twisting, crushing, or other failures, in order to determine their condition.

[0004] This manual inspection method has a significant time lag. Often, by the time external abnormalities such as twisting or crushing of the sealing gaskets and disc springs are discovered, the electrolytic cell has already developed substantial problems such as gas or liquid leakage, making it impossible to provide timely warnings and address potential faults. Utility Model Content

[0005] To address the technical problems mentioned in the background section, this application provides an electrolytic cell monitoring device. This monitoring device includes multiple electrolytic cells and at least two baffles. Both ends of the electrolytic cells are connected to the baffles, and a pressure measuring device is installed on the side of the baffles furthest from the electrolytic cells.

[0006] It also includes a distance sensor, which is installed on the side of the baffle close to the electrolytic cell. The pressure measuring device and the distance sensor measure the pressure of the disc spring of the electrolytic cell and the change in the length of the electrolytic cell, respectively, to infer whether the electrolytic cell needs maintenance.

[0007] According to one embodiment of this application, a pressure measuring device is arranged around one side of a baffle. Each electrolytic cell has a disc spring at one end that passes through the baffle. The pressure measuring device is installed at the end of the disc spring away from the baffle, and the pressure measuring device corresponds to the disc spring one-to-one.

[0008] According to one embodiment of this application, a calibration plate is mounted on a baffle away from the ranging sensor, and the ranging sensor measures the distance between one end of the baffle and one end of the calibration plate to record the length of the electrolytic cell.

[0009] According to one embodiment of this application, the structure of the ranging sensor and calibration plate extends beyond the baffle and along the diameter direction of the baffle, and at least four ranging sensors and four calibration plates are installed on the baffle. The ranging sensors and calibration plates are symmetrically arranged in pairs along the first horizontal direction and the second vertical direction.

[0010] According to one embodiment of this application, a pressure sensor is also installed outside the baffle for mounting the ranging sensor. The pressure sensor is partially disposed inside the baffle to detect the internal pressure of the electrolytic cell.

[0011] According to one embodiment of this application, a temperature sensor is installed on the outside of a baffle away from the ranging sensor, and the temperature sensor is partially disposed inside the baffle to detect the temperature of the electrolytic cell.

[0012] According to one embodiment of this application, the axes of the pressure sensor and the temperature sensor are arranged parallel to the plane where the end face of the baffle is located. The pressure sensor and the temperature sensor are inclined relative to the length direction of the electrolytic cell, and the inclination angles of the pressure sensor and the temperature sensor are the same.

[0013] According to one embodiment provided in this application, after installation, the distance between the electrolytic cell and the inner portion of the two side baffles is L1; after the electrolytic cell is in operation, the distance between the electrolytic cell and the inner portion of the two side baffles is L2, satisfying 98.5%L1≤L2≤101.5%L1.

[0014] According to one embodiment of this application, after the electrolytic cell is in operation, when the distances L1 and L2 satisfy 95%L1≥L2 and / or L2≥105%L1, the electrolytic cell stops working.

[0015] According to one embodiment provided in this application, the electrolytic cell equipment in this application is an alkaline electrolytic cell.

[0016] Compared with the prior art, the significant technological advancement of this application lies in the following: by monitoring the length change, real-time temperature and pressure of the alkaline electrolytic cell, this application can accurately calculate the actual compression of the sealing gasket by combining the thermal expansion coefficient of its electrode plates, eliminating the interference of temperature and pressure fluctuations on the judgment of the disc spring and sealing gasket status, making the early warning more in line with the dynamic operation law of the alkaline electrolytic cell, and solving the defect that manual inspection cannot quantify the impact of temperature and pressure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the electrolytic cell monitoring device provided in the embodiments of this application;

[0019] Figure 2 for Figure 1 Another perspective structural diagram.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100-Electrolytic cell; 200-Baffle; 300-Pressure measuring device; 400-Distance sensor; 500-Calibration plate; 600-Pressure sensor; 700-Temperature sensor.

[0022] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0025] Secondly, it should be noted that in the description of this application, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0026] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] Alkaline water electrolysis hydrogen production equipment has become a core piece of equipment in the green hydrogen industry chain due to its high technological maturity, cost advantage, and adaptability to large-scale hydrogen production. Among them, the alkaline electrolyzer is the core component of the equipment. During operation, due to the need to adapt to green electricity, the electrolyzer will be repeatedly stopped and started, resulting in repeated changes in temperature and pressure. This places higher stability requirements on the sealing gaskets and external pre-tensioning disc springs on the electrolyzer that are responsible for the overall sealing of the machine.

[0029] Currently, the monitoring of disc springs and gaskets mainly relies on manual inspection. Specifically, this involves observing the appearance of parts for abnormalities, such as whether the gaskets and disc springs show signs of twisting, crushing, or other failures, in order to determine their condition.

[0030] This manual inspection method has a significant time lag. Often, by the time external abnormalities such as twisting or crushing of the sealing gaskets and disc springs are discovered, the electrolytic cell has already developed substantial problems such as gas or liquid leakage, making it impossible to provide timely warnings and address potential faults.

[0031] Figure 1 This is a schematic diagram of the structure of the electrolytic cell monitoring device provided in the embodiments of this application; Figure 2 for Figure 1 Another perspective structural diagram.

[0032] like Figure 1 and Figure 2As shown, in order to solve the technical problems mentioned in the background art, this application provides an electrolytic cell monitoring device. This monitoring device includes multiple electrolytic cells 100 and at least two baffles 200. Both ends of the electrolytic cells 100 are connected to the baffles 200, and a pressure measuring device 300 is provided on the side of the baffles 200 away from the electrolytic cells 100.

[0033] It also includes a ranging sensor 400, which is installed on the side of the baffle 200 near the electrolytic cell 100. The pressure measuring device 300 and the ranging sensor 400 measure the pressure of the disc spring of the electrolytic cell 100 and the change in the length of the electrolytic cell 100, respectively, to infer whether the electrolytic cell 100 needs maintenance.

[0034] It should be noted that the pressure measuring device 300 monitors the pressure of the disc spring in the electrolytic cell 100 in real time, while the distance sensor 400 simultaneously captures the length change of the electrolytic cell 100, forming a dynamic linkage monitoring mechanism. Compared with the existing manual inspection method, this can directly and promptly reflect the real-time status of the disc spring and baffle 200 on the electrolytic cell 100, avoiding the one-sidedness of monitoring a single parameter and providing more comprehensive data support for status judgment.

[0035] The disc spring pressure data acquired by the pressure measuring device 300 and the length change of the electrolytic cell 100 measured by the distance measuring sensor 400 can be mutually verified. Combined with parameters such as temperature and internal pressure during the operation of the electrolytic cell 100, calculation and analysis can accurately determine the compression state of the baffle 200 and the preload decay of the disc spring. The real-time compression of the baffle 200 of the electrolytic cell 100 can be deduced using the length change. After comparing with the pressure data, it is possible to more accurately identify whether the disc spring and the baffle 200 are within the design safety range.

[0036] Based on the measured data from the pressure measuring device 300 and the distance sensor 400, the attenuation curves of the disc springs and baffles 200 of the electrolytic cell 100 during their lifespan can be compared to predict the maintenance time in advance and issue an early warning. This function effectively solves the problem of delayed fault detection in the prior art, and can promptly remind maintenance before abnormalities such as gas leakage or liquid leakage occur in the electrolytic cell 100.

[0037] This equipment replaces manual inspection with automated monitoring, reducing human intervention in the electrolyzer 100 and lowering the subjective error of human observation. At the same time, it provides data support for the intelligent operation and maintenance of the electrolyzer 100, helping to ensure the long-term stable operation of the electrolyzer 100 and improving the continuity and safety of green hydrogen production.

[0038] According to one embodiment of this application, a pressure measuring device 300 is arranged around one side of a baffle 200. Each electrolytic cell 100 is provided with a disc spring at one end passing through the baffle 200. The pressure measuring device 300 is installed at the end of the disc spring away from the baffle 200, and the pressure measuring device 300 corresponds to the disc spring one by one.

[0039] It should be noted that the pressure measuring device 300 is set up one-to-one with the disc spring, which can independently and accurately monitor the disc spring pressure of each electrolytic cell 100, avoiding errors when multiple disc springs share a monitoring device. It can directly locate the pressure abnormality of the disc spring of a single electrolytic cell 100, greatly improving the pertinence and efficiency of fault diagnosis.

[0040] Furthermore, the pressure measuring device 300 is installed at the end of the disc spring away from the baffle 200, close to the force point of the disc spring. It can capture the subtle pressure changes of the disc spring in real time during the repeated start-stop and temperature and pressure changes of the electrolytic cell 100. The data acquisition is more timely and accurate, providing a reliable basis for judging the preload decay state of the disc spring and avoiding signal delay or distortion caused by the monitoring point being far from the force position.

[0041] Furthermore, the pressure measuring device 300 is arranged around one side of the baffle 200 to accommodate the large-scale layout of multiple electrolytic cells 100. This not only meets the synchronous monitoring needs of multiple electrolytic cells 100, but also reduces the monitoring deviation caused by the dispersed layout through a unified installation benchmark, thereby further improving the accuracy of judging the compression state of the sealing gasket and the stability of the disc spring.

[0042] Furthermore, in the scenario of large-scale operation of electrolytic cells 100, the disc spring pressure data of different electrolytic cells 100 can be quickly compared. Individuals with faster aging speed or abnormal condition can be identified by data differences, providing data support for the maintenance and sorting of batch electrolytic cells 100, avoiding the spread of single cell failures and affecting the overall operation, and ensuring the continuity of large-scale production.

[0043] According to one embodiment of this application, a calibration plate 500 is installed on a baffle 200 that is far away from the ranging sensor 400. The ranging sensor 400 measures the distance between this end of the baffle 200 and one end of the calibration plate 500 to record the length of the electrolytic cell 100.

[0044] It should be noted that the distance sensor 400 indirectly records the length of the electrolytic cell 100 by measuring the distance from the baffle 200 to the calibration plate 500, adapting to the expansion and contraction deformation of the electrolytic cell 100 due to temperature and pressure changes during repeated start-ups and shutdowns. Since the calibration plate 500 is mounted on the baffle 200, which is far from the distance sensor 400, it forms a rigid connection with the baffles 200 at both ends of the electrolytic cell 100. This allows it to capture subtle changes in the overall length of the electrolytic cell 100 in real time, accurately reflecting the compression / rebound state of the baffle 200 and the stress deformation of the disc spring, thus solving the problem that manual inspection cannot capture subtle dynamic changes.

[0045] Furthermore, the fixed setting of the calibration plate 500 provides a unified reference standard for the length measurement of different electrolytic cells 100, facilitating data comparison and analysis during the large-scale operation of multiple sets of electrolytic cells 100. By comparing the differences in length changes of each electrolytic cell 100, individuals with abnormal aging rates of baffles 200 or disc springs can be quickly identified.

[0046] According to one embodiment of this application, the distance sensor 400 and the calibration plate 500 partially extend beyond the baffle 200 and along the diameter direction of the baffle 200. At least four distance sensors 400 and four calibration plates 500 are mounted on the baffle 200. The distance sensors 400 and the calibration plates 500 are symmetrically arranged in pairs along the first horizontal direction and the second vertical direction.

[0047] It should be noted that the structure of the ranging sensor 400 and the calibration plate 500 extends beyond the baffle 200 and along the diameter direction, which can avoid the baffle 200 from obstructing the measurement path. This ensures that when the electrolytic cell 100 expands or deforms slightly due to temperature and pressure changes, the sensor can always stably capture the signal of the calibration plate 500, reducing measurement interruptions or errors caused by obstruction. This provides a guarantee for the accurate recording of the length change of the electrolytic cell 100, which meets the monitoring requirement of "calculating the compression of the sealing gasket and the compression of the disc spring through real-time data".

[0048] At least four ranging sensors 400 and four calibration plates 500 are symmetrically arranged in pairs along the first horizontal direction and the second vertical direction, which can simultaneously collect length data of different positions of the electrolytic cell 100 from both horizontal and vertical dimensions. Based on the obtained data, the maximum deviation value Δ can be calculated to derive the offset angle θ of the baffle 200. The multi-directional symmetrical data can more accurately reflect whether there are abnormal deformations such as tilting or twisting of the electrolytic cell 100, avoiding the problem of off-center loading that cannot be identified by single-direction measurement, and thus accurately determining whether the sealing gasket has been locally crushed due to uneven force and whether the disc spring has been weakened due to off-center loading.

[0049] It should also be noted that the maximum deviation value Δ in this application is obtained by subtracting the initial distance L1 of the electrolytic cell 100 from the measured maximum or minimum distance L2 (max, min) between the electrolytic cell 100 and the baffles 200 on both sides, i.e., Δ = L2 (max, min) - L1. Furthermore, the angle θ is the offset angle of the electrolytic cell 100, and θ can be calculated using the formula...

[0050] The result is that L is the distance L2 between the two side baffles 200 measured in a single measurement, minus the distance L1 between the electrolytic cell 100 and the side baffles 200, i.e., L = L2 - L1. Furthermore, L obtained by L2 - L1 can also be the compression of the disc spring during operation. This shows that the calculated data length L and angle θ can be used to determine whether the offset angle of the electrolytic cell 100 and the condition of the disc spring are within the design range, so as to determine whether the current condition is normal and transmit the data to the maintenance personnel.

[0051] According to one embodiment of this application, a pressure sensor 600 is also installed outside the baffle 200 for mounting the ranging sensor 400. The pressure sensor 600 is partially disposed inside the baffle 200 to detect the internal pressure of the electrolytic cell 100.

[0052] According to one embodiment of this application, a temperature sensor 700 is installed on the outside of a baffle 200 away from the ranging sensor 400. The temperature sensor 700 is partially disposed inside the baffle 200 to detect the temperature of the electrolytic cell 100.

[0053] It should be noted that the pressure sensor 600 and the temperature sensor 700 jointly monitor the temperature of the electrolytic cell 100 and the internal gas pressure. Since the pressure sensor 600 and the temperature sensor 700 are commonly installed in a typical electrolytic cell 100, this application does not impose any further limitations on them.

[0054] According to one embodiment of this application, the axes of the pressure sensor 600 and the temperature sensor 700 are arranged parallel to the plane where the end face of the baffle 200 is located. The pressure sensor 600 and the temperature sensor 700 are inclined relative to the length direction of the electrolytic cell 100, and the inclination angles of the pressure sensor 600 and the temperature sensor 700 are the same.

[0055] It should be noted that the sensor axis is parallel to the plane containing the end face of the baffle 200 and is inclined relative to the length direction of the electrolytic cell 100, which optimizes the installation space layout of the sensor on the baffle 200. This inclined design avoids structural interference with other components on the baffle 200, such as the ranging sensor 400 and the pressure measuring device 300. It is particularly suitable for the compact layout of multi-sensor integration, ensuring synchronous monitoring of temperature and pressure parameters within a limited space, which meets the overall design requirement of "online monitoring equipment monitoring multiple parameters".

[0056] Furthermore, the pressure sensor 600 and temperature sensor 700 are tilted at the same angle, ensuring that their detection areas within the electrolytic cell 100 correspond. Because of the identical tilt angle, the sensor probes extend in the same direction within the electrolytic cell 100, enabling more accurate and synchronous acquisition of pressure and temperature data from the same or adjacent areas, reducing parameter correlation deviations caused by differences in detection positions. The tilt relative to the length of the electrolytic cell 100 allows the sensor probes to penetrate deeper into or better conform to the medium flow path within the electrolytic cell 100. When temperature and pressure fluctuations occur due to repeated start-stop cycles in the electrolytic cell 100, the tilt angle allows the sensor to maintain more stable contact with the medium, reducing the risk of the probes detaching from the effective detection area due to the expansion and contraction of the electrolytic cell 100. This ensures the continuity and accuracy of temperature and pressure data, providing a basis for judging the sealing performance of the baffle 200 and the stress state of the disc spring.

[0057] According to one embodiment provided in this application, after installation, the distance between the electrolytic cell 100 and the inner portion of the two side baffles 200 is L1; after the electrolytic cell 100 is in operation, the distance between the electrolytic cell 100 and the inner portion of the two side baffles 200 is L2, satisfying 98.5%L1≤L2≤101.5%L1.

[0058] According to one embodiment of this application, after the electrolytic cell 100 is running, when the distances L1 and L2 satisfy 95%L1≥L2 and / or L2≥105%L1, the electrolytic cell 100 stops working.

[0059] It should be noted that the normal operating threshold of 98.5%L1≤L2≤101.5%L1 provides a clear safety range for the length variation of the electrolyzer 100. This range is based on the total thickness ts of the baffle 200, the ultimate compression λm, and the disc spring preload parameters, reflecting that the baffle 200 is in a reasonable compression state and the disc spring preload is stable. When L2 is within this range, it indicates that the baffle 200 has not failed to seal due to excessive compression or relaxation, and the disc spring has not been twisted or crushed due to pressure decay or excessive force. This effectively ensures the basic sealing performance of the electrolyzer 100 under repeated start-stop and temperature and pressure fluctuations in green electricity scenarios, reducing potential risks caused by initial minor deformations.

[0060] The automatic shutdown mechanism, triggered when L2 ≤ 95% L1 or L2 ≥ 105% L1, is a protective measure against severe anomalies. This threshold corresponds to extreme cases such as excessive compression or relaxation of the baffle 200 or severe failure of the disc spring. Automatic shutdown prevents the electrolytic cell 100 from continuing to operate under abnormal length variations, thus avoiding complete damage to the baffle 200, breakage of the disc spring, or deformation of the electrolytic cell 100 body due to stress concentration. It also addresses the issue of delayed detection of leaks during manual inspections, minimizing potential damage from malfunctions.

[0061] It should also be noted that this application can also determine the working status of the electrolytic cell 100 by comparing the compression amount λ of the baffle 200 and the real-time thickness t of the baffle 200 with the data in the database. Further, λ = t1 - t2, where t1 is the initial thickness of the baffle 200 and t2 is the thickness of the baffle 200 during operation.

[0062] Furthermore, t2 = L2 - L1 - (L1 - t1)(T1 - T2)α, where t2 is the thickness of the baffle 200 during operation, L2 is the length of the portion of the electrolytic cell 100 located inside the baffle 200 during operation, L1 is the initial length of the portion of the electrolytic cell 100 located inside the baffle 200, t1 is the initial thickness of the baffle 200, T1 is the initial temperature inside the electrolytic cell 100 measured by the temperature sensor 700, T2 is the operating temperature inside the electrolytic cell 100 measured by the temperature sensor 700, and α is the coefficient of thermal expansion of the electrode plate of the electrolytic cell 100, which is a constant. Based on the calculated λ and t2, and by comparing them with the theoretical compression amount in the database, it can be determined whether the compression amount of the baffle 200 is within the normal range.

[0063] According to one embodiment provided in this application, the electrolytic cell 100 device in this application is an alkaline electrolytic cell 100.

[0064] It should be noted that during the operation of the alkaline electrolyzer 100, due to the need for repeated start-ups and shutdowns for green electricity adaptation, the internal temperature and pressure fluctuate frequently, which can easily lead to uneven thermal expansion of the electrode plates and dynamic changes in the compression of the sealing gasket. This application, by monitoring the length change, real-time temperature, and pressure of the alkaline electrolyzer 100, can accurately calculate the actual compression of the sealing gasket by combining its electrode plate thermal expansion coefficient, eliminating the interference of temperature and pressure fluctuations on the judgment of the disc spring and sealing gasket status, making the early warning more consistent with the dynamic operating pattern of the alkaline electrolyzer 100, and solving the deficiency of manual inspection in quantifying the impact of temperature and pressure. The electrolyzer 100 provided in this application is an alkaline electrolyzer 100, and the monitoring equipment installed outside the electrolyzer 100 can also be used in water-to-hydrogen electrolyzers 100 and green electricity-to-hydrogen electrolyzers 100.

[0065] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0066] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An electrolytic cell monitoring device, characterized in that, It includes multiple electrolytic cells (100) and at least two baffles (200). The two ends of the electrolytic cells (100) are respectively connected to the baffles (200). A pressure measuring device (300) is provided on the side of the baffles (200) away from the electrolytic cells (100). It also includes a distance sensor (400), which is installed on the side of the baffle (200) near the electrolytic cell (100). The pressure measuring device (300) and the distance sensor (400) respectively measure the pressure of the disc spring of the electrolytic cell (100) and the change in length of the electrolytic cell (100) to infer whether the electrolytic cell (100) needs maintenance.

2. The electrolytic cell monitoring device according to claim 1, characterized in that, The pressure measuring device (300) is arranged around one side of the baffle (200). Each electrolytic cell (100) is provided with a disc spring at one end that passes through the baffle (200). The pressure measuring device (300) is installed at the end of the disc spring away from the baffle (200), and the pressure measuring device (300) corresponds to the disc spring one by one.

3. The electrolytic cell monitoring device according to claim 1, characterized in that, A calibration plate (500) is mounted on one of the baffles (200) located away from the ranging sensor (400). The ranging sensor (400) measures the distance between one end of the baffle (200) and one end of the calibration plate (500) to record the length of the electrolytic cell (100).

4. The electrolytic cell monitoring device according to claim 3, characterized in that, The distance sensor (400) and the calibration plate (500) have a partial structure that extends beyond the baffle (200) and along the diameter direction of the baffle (200). At least four distance sensors (400) and four calibration plates (500) are mounted on the baffle (200). The distance sensors (400) and the calibration plates (500) are symmetrically arranged in pairs along the first horizontal direction and the second vertical direction.

5. The electrolytic cell monitoring device according to claim 3, characterized in that, A pressure sensor (600) is also installed outside the baffle (200) for mounting the ranging sensor (400). The pressure sensor (600) is partially disposed inside the baffle (200) to detect the internal pressure of the electrolytic cell (100).

6. The electrolytic cell monitoring device according to claim 5, characterized in that, A temperature sensor (700) is installed on the outside of the baffle (200) away from the ranging sensor (400). The temperature sensor (700) is partially disposed inside the baffle (200) to detect the temperature of the electrolytic cell (100).

7. The electrolytic cell monitoring device according to claim 6, characterized in that, The axes of the pressure sensor (600) and the temperature sensor (700) are arranged parallel to the plane of the end face of the baffle (200). The pressure sensor (600) and the temperature sensor (700) are inclined relative to the length direction of the electrolytic cell (100), and the inclination angles of the pressure sensor (600) and the temperature sensor (700) are the same.

8. The electrolytic cell monitoring device according to claim 3, characterized in that, After installation, the distance between the electrolytic cell (100) and the inner portion of the baffles (200) on both sides is L1; after the electrolytic cell (100) is in operation, the distance between the electrolytic cell (100) and the inner portion of the baffles (200) on both sides is L2, satisfying 98.5%L1≤L2≤101.5%L1.

9. The electrolytic cell monitoring device according to claim 8, characterized in that, After the electrolytic cell (100) is in operation, when the distance L1 and the distance L2 satisfy 95%L1≥L2 and / or L2≥105%L1, the electrolytic cell (100) stops working.

10. An electrolytic cell monitoring device according to any one of claims 1-9, characterized in that, The electrolytic cell (100) is an alkaline electrolytic cell (100).

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