An electrolytic cell pipeline impurity real-time detection system based on an endoscope

Abstract

The utility model discloses a kind of electrolytic cell pipeline impurity real-time detection systems based on endoscope, including controlled in pipeline movement endoscope module, pattern transmission processing system, system linkage module;Endoscope module includes integrated optical module, mechanical drive module, it moves in pipeline and visualizes collection to impurity in pipeline;Pattern transmission processing system includes control cable, control processing system, control cable includes signal cable, optical fiber image transmission bundle, control cable one end is connected with endoscope module, control processing system is based on algorithm real-time analysis impurity characteristic to the image transmission of integrated optical module;System linkage module triggers hierarchical early warning based on impurity detection result. With hays alloy C276 shell, sapphire protective lens and gradient composite coating, combined with cooling runner design, so that system can be stable operation under high temperature, high pressure, strong corrosion environment, probe continuous working life ≥ 80,000 hours, more than 5 times than traditional endoscope.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic hydrogen production technology, specifically to an endoscope-based real-time detection system for impurities in electrolytic cell pipelines. Background Technology

[0002] In the green hydrogen industry chain, the electrolyzer is a core piece of equipment, and the cleanliness of its internal piping system has a decisive impact on electrolysis efficiency, gas purity, equipment lifespan, and safety. During manufacturing, installation, operation, and maintenance, the piping system inevitably introduces or generates unidentified impurities such as metal shavings, welding slag, and polymer particles. Furthermore, the wet hydrogen gas produced at the cathode and anode of the electrolyzer carries a large amount of alkali solution and may carry electrode coating fragments and sealing debris into downstream separation devices. These impurities can not only cause pipe blockage, catalyst contamination and poisoning, and equipment damage, but more seriously, when metallic impurities remain at the inlet and outlet of the alkali channel in the electrolyzer's electrode frame, they can cause short circuits due to material potential differences, resulting in arcing and burning of the electrode plates, and even threatening the safe operation of the equipment. In particular, the alkali pipeline connecting the electrolyzer and the separation system is highly susceptible to impurities remaining during construction and flowing into the electrolyzer with the fluid, creating hidden safety hazards.

[0003] Existing detection technologies are limited by inherent limitations in their principles and structures, making them insufficient to meet practical needs. Offline disassembly and inspection require shutting down the pipeline and dismantling it to assess impurities through pressure / flow monitoring or sampling analysis. This method is not only time-consuming and labor-intensive but also fails to track the dynamic accumulation of impurities in real time, leading to delayed problem detection. Non-destructive testing of the pipeline's external wall can only indirectly infer the internal condition and cannot achieve visual identification and location of impurities. Traditional visual inspection relies on manual operation and is limited by the inspection angle and lighting conditions, resulting in a high rate of missed detections, especially for tiny particles smaller than 0.5 mm. Furthermore, conventional endoscopes, due to insufficient material tolerance, cannot operate stably in the high-temperature (above 80°C), high-pressure (above 5MPa), and highly corrosive (pH 0-14) environments of electrolytic cells. Frequent equipment replacement further increases maintenance costs and downtime risks.

[0004] The aforementioned technical bottlenecks have long resulted in a predicament for impurity detection in electrolyzer pipelines, characterized by "delayed detection, high false negative rates, and poor environmental adaptability." This makes it difficult to detect early-stage problems in a timely manner and to effectively monitor the distribution and migration trends of impurities, potentially leading to decreased electrolysis efficiency, shortened equipment lifespan, and even safety accidents. Therefore, there is an urgent need for a new technical solution that can achieve in-situ, real-time, and visual detection of impurities within the pipelines during normal operation or short shutdowns, without large-scale disassembly of the pipelines, and can complete impurity identification and location. This solution would overcome the inherent drawbacks of existing detection methods and ensure the safe and efficient operation of the green hydrogen production system. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a real-time detection system for impurities in electrolytic cell pipelines based on an endoscope.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An endoscope-based real-time detection system for impurities in an electrolytic cell pipeline includes an endoscope module that moves controlled within the pipeline, a pattern transmission and processing system, and a system linkage module.

[0008] The endoscope module includes an integrated optical module and a mechanical drive module, which moves inside the pipe and visualizes and collects impurities inside the pipe.

[0009] The pattern transmission and processing system includes a control cable and a control processing system. One end of the control cable is connected to the endoscope module, and the other end passes through the target tube and is connected to the control processing system. The control processing system analyzes the impurity characteristics of the image transmitted by the integrated optical module in real time based on an algorithm.

[0010] The system linkage module triggers graded early warnings based on impurity detection results and links with the electrolytic cell DCS system to form active protection with closed-loop control throughout the entire process.

[0011] Furthermore, the integrated optical module and the mechanical drive module are detachably connected. The mechanical drive module includes a sleeve portion, and the integrated optical module is detachably installed inside the sleeve portion. The outer circumference of the sleeve portion is provided with a traveling wheel connected by a swing arm structure. The swing arm structure and the traveling wheel support the sleeve portion in the target pipe. The expansion range of the swing arm structure controls the outer tangent circle trajectory of the traveling wheel to match the pipe diameter of the target pipe.

[0012] Furthermore, the integrated optical module includes a positioning base and a gimbal module. The gimbal module is mounted on one axial end of the positioning base and connected to a control cable on the other end. The gimbal module extends out of one end of the sleeve portion.

[0013] Furthermore, it also includes a pipe interface structure, which includes a device compartment pipe with a flange opening at one end, the internal space of the device compartment pipe being at least sufficient to accommodate the endoscope module; control cables exit from the device compartment pipe and are sealed to it;

[0014] The target pipeline is equipped with a pipeline flange that mates with a flange opening. The pipeline flange includes a flange interface pre-installed or formed by a pressurized opening on the target pipeline. The target pipeline includes the inlet or outlet pipeline of the electrolytic cell.

[0015] Furthermore, the equipment compartment pipeline has a multi-stage sealing structure at the point where the control cable passes through; the multi-stage sealing structure includes an inner seal, an outer seal, and an intermediate seal. The inner seal is located inside the pipeline interface structure on the side in contact with the material, the outer seal is located outside the pipeline interface structure on the side in contact with normal pressure, and the intermediate seal is located between the inner seal and the outer seal.

[0016] Furthermore, the sealed connection is provided with a magnetic fluid sealing structure, including an annular sealing cavity, magnetic fluid, and an electromagnetic coil. The annular sealing cavity is a hollow sealing ring structure in the shape of a circle. The hollow interior of the annular sealing cavity is filled with magnetic fluid, and an electromagnetic coil is arranged on the outer periphery of the annular sealing cavity. The current of the electromagnetic coil is controlled to change the magnetic field strength, thereby adjusting the sealing strength of the annular sealing cavity for the control cable.

[0017] Furthermore, the gimbal module integrates a multispectral LED light source and a corrosion-resistant endoscope probe. The housing of the integrated optical module and the mechanical drive module is made of Hastelloy C276, and the lens window of the integrated optical module is made of sapphire protective lens.

[0018] Furthermore, the inner wall of the outer shell structure, made of Hastelloy C276, integrates cooling channels, through which circulating cooling water flows.

[0019] A control method for an endoscope-based real-time detection system for impurities in electrolytic cell pipelines, comprising the aforementioned real-time detection system for impurities in electrolytic cell pipelines, including the following steps:

[0020] S1: Overall system architecture construction, including building a corrosion-resistant and high-pressure-resistant online detection system to realize online monitoring, visualization and intelligent analysis of pipeline impurities;

[0021] The installation of the pipe interface structure involves installing the pipe interface structure with the built-in endoscope module onto the flange interface of the target pipe. The magnetohydrodynamic sealing structure is activated, and the magnetic field strength is dynamically adjusted by linking the pressure sensor through the PID controller.

[0022] S2: Open the isolation valve to connect the pipe interface structure with the target pipe, and the endoscope module moves from the pipe interface structure into the target pipe;

[0023] S3: Impurity detection and analysis process: The endoscope module enters the target pipeline, the mechanical drive module controls the axial movement of the probe, the pan-tilt module controls the rotation of the probe for detection, and the multispectral LED light source provides segmented illumination to acquire high-definition images of the pipeline's inner wall; the fiber optic image transmission bundle transmits the images to the control and processing system in real time, and the control and processing system performs AI analysis; based on the deep learning model mounted on the analysis unit, the size, location, and type of impurities are identified;

[0024] S4: Closed-loop control and impurity handling, triggering different levels of alarms based on impurity size:

[0025] Level I risk, control actions: immediately trigger audible and visual alarms; link the electrolytic cell DCS system: cut off the anode / cathode power supply; close the upstream and downstream pneumatic ball valves of the detection point, and isolate the faulty pipeline;

[0026] Level II risk, control actions: yellow warning light flashes, heat map of impurity location pops up in the central control room; pipeline filter and self-cleaning system are activated: the material undergoes multi-stage filtration to remove impurities;

[0027] Level III risk, control actions: blue status light stays on, impurity distribution trend curve is generated on the operation interface; detection frequency is automatically adjusted.

[0028] The advantages and beneficial effects of this utility model are as follows:

[0029] 1. Extreme environmental adaptability and long-term reliability: Utilizing a Hastelloy C276 shell, sapphire protective lens, and gradient composite coating, combined with a cooling channel design, the system can operate stably in high-temperature, high-pressure, and highly corrosive environments. The probe's continuous working life is ≥80,000 hours, more than 5 times that of traditional endoscopes. The magnetohydrodynamic dynamic sealing structure, through a double-layer sealing cavity linked to an electromagnetic coil, achieves dynamic sealing of cable entry and exit under high-pressure environments, solving a key engineering challenge in online detection.

[0030] 2. High-precision detection and intelligent analysis capabilities: Integrating a multispectral LED light source (400-1000nm) and fiber optic image transmission bundle, coupled with the improved YOLOv7 deep learning model, it can identify particles as small as 0.2mm, with a detection sensitivity 5 times higher than traditional technologies and an accuracy rate ≥98%. Through multispectral imaging, the shape and location of impurities can be visualized and located.

[0031] 3. Full-process closed-loop control and active safety protection: A three-level impurity classification and early warning mechanism is established (Level I emergency shutdown, Level II flow rate adjustment, Level III trend monitoring), which is linked in real time with the electrolytic cell DCS system. In case of emergency, the power supply can be automatically cut off, the valves can be closed and nitrogen purging can be started to avoid serious accidents such as electrode plate burnout. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0033] Figure 2 This is one of the structural schematic diagrams of Embodiment 2 of this utility model;

[0034] Figure 3 This is the second structural schematic diagram of Embodiment 2 of this utility model.

[0035] Figure 4This is a schematic diagram of the multi-stage sealing structure in this utility model;

[0036] Figure 5 This is a structural schematic diagram of Embodiment 3 of this utility model;

[0037] Figure 6 This is a schematic diagram of the endoscope module in this utility model;

[0038] Figure 7 This is an exploded view of the endoscope module in this utility model;

[0039] Figure 8 This is a module connection diagram of this utility model;

[0040] In the diagram: 1. Endoscope module; 2. Integrated optical module; 3. Mechanical drive module; 4. Control cable; 5. Control processing system; 6. Sleeve section; 7. Swing arm structure; 8. Wheels; 9. Positioning base; 10. Gimbal module; 11. Pipe interface structure; 12. Flange opening; 13. Equipment compartment pipe; 14. Target pipe; 15. Pipe flange; 16. Multi-stage sealing structure; 17. Inner seal; 18. Outer seal; 19. Intermediate seal; 20. Magnetofluid 21. Sealing structure; 22. Annular sealing cavity; 23. Magnetofluid; 24. Electromagnetic coil; 25. Isolation valve; 26. Fixed seal; 27. Winding device; 28. Winding frame; 29. ​​Winding motor; 30. Lip seal; 31. Sealing chamber; 32. Purge air source; 33. Drain pipe; 34. Lip; 35. Self-tightening helical spring; 36. Step; 37. Rigid material; 38. Capillary tube; 39. Automatic liquid replenishment module; 40. Swing arm; 41. Axial moving ring. Detailed Implementation

[0041] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0042] Example 1:

[0043] An endoscope-based real-time detection system for impurities in an electrolytic cell pipeline includes an endoscope module 1 that moves controlled within the pipeline, a pattern transmission and processing system, and a system linkage module. In this embodiment, the real-time detection system is a detection device fixedly installed on the target pipeline of the electrolytic cell, for example, at the alkali pipeline connecting the electrolytic cell and the separation system, where impurities from the construction process are most likely to remain. Specifically, as shown... Figure 1As shown, a tee structure can be designed at the bend of the target pipe 14. A pipe flange 15 is set at one end of the horizontal branch of the tee. A pipe interface structure 11 is installed on the pipe flange 15. The pipe interface structure 11 includes an equipment compartment pipe 13 with a flange opening 12 at one end. The space inside the equipment compartment pipe 13 is at least sufficient to accommodate the endoscope module 1. The control cable 4 passes through the equipment compartment pipe 13 and is sealed to it.

[0044] The endoscope module 1 includes an integrated optical module 2 and a mechanical drive module 3. The mechanical drive module 3 serves as the power source for the endoscope module 1, controlling its movement within the target channel 14 and enabling the visualization and acquisition of impurities within the channel. The integrated optical module 2 is equipped with a multispectral LED light source with a wavelength range of 400~1000nm, supporting visible light and near-infrared imaging. The probe housing is made of Hastelloy C276, achieving a pressure resistance of 10MPa and a temperature resistance of 150℃. The visible light and infrared imaging features a multi-band switching mode, such as 400~700nm visible light and 700~1000nm near-infrared light. By using different wavelength light sources, the contrast of specific impurities is enhanced. For example, metal shavings show more obvious reflective characteristics under near-infrared light, while polymer particles show more prominent color differences under visible light. The lens window of the integrated optical module 2 uses a sapphire protective lens with a thickness of 2mm, which is resistant to acid and alkali corrosion. The sapphire lens has a light transmittance of ≥90% (visible light band) and a refractive index of 1.76~1.77, which can reduce image distortion caused by light refraction and improve image clarity.

[0045] The image transmission and processing system includes a control cable 4 and a control processing system 5. The control cable 4 includes a signal cable and an optical fiber image transmission bundle. In specific implementation, one end of the control cable 4 is connected to the endoscope module 1, and the other end is connected to the control processing system 5. The mechanical drive module 3 can be connected through the signal cable to drive the movement of the endoscope module in the pipeline. The image data collected by the integrated optical module 2 is transmitted through the optical fiber image transmission bundle. The control processing system 5 analyzes the impurity characteristics of the images transmitted by the optical fiber image transmission bundle in real time based on algorithms. One end of the endoscope module 1 transmits the collected monitoring data to an external processing center through the control cable 4 and performs data parsing and processing. The control processing system 5 is located outside the target pipeline 14 and is connected to the internal endoscope module 1 through the control cable 4. Since the endoscope module 1 needs to move a certain distance within the target pipeline 14, a winding device 26 for the control cable 4 can be installed in the equipment compartment pipeline 13 to support the movement of the endoscope module 1 within the target pipeline 14. The winding device 26 includes a winding frame 27 rotatably connected to the equipment compartment pipe 13, and a winding motor 28 that drives the winding frame 27 to rotate.

[0046] Since this real-time detection system is a fixed setup, the section where the control cable 4 passes through the equipment compartment pipe 13 can be designed as a fixed seal 25. For example, the position where the control cable 4 passes through the equipment compartment pipe 13 is fixed and will not move or rotate axially. That is, the metal shell of the control cable 4 can be welded and fixed to the equipment compartment pipe 13. A winding device for winding the flexible control cable 4 is installed inside the equipment compartment pipe 13. The rotating shaft of the winding device can be controlled by a motor to perform winding and unwinding operations. The shaft can be sealed using a valve stem sealing structure similar to a valve where it passes through the equipment compartment pipe 13. Furthermore, the speed at which the winding device winds up and unwinds the control cable 4 is coordinated with the moving speed of the endoscope module 1, so that it can move freely within the target pipe 14 without the risk of the control cable 4 accumulating and tangling. Therefore, the equipment compartment pipe 13 in this embodiment needs to have sufficient volume to accommodate the endoscope module 1 and the winding device 26.

[0047] The endoscope module 1 moves within the target pipe 14, enabling real-time monitoring of the conditions within the target pipe 14 and generating data that is transmitted via the control cable 4. The AI ​​analysis unit analyzes the detected impurities. The AI ​​analysis unit is equipped with a deep learning model (an improved version of YOLOv7), and the training dataset contains 10 types of impurity features, such as metal shavings, polymer particles, and bubbles. This allows it to identify the volume, type, and other data of the impurities detected by the endoscope, with an accuracy rate of ≥98%.

[0048] The system linkage module triggers graded early warnings based on impurity detection results, linking with the electrolyzer's DCS control system to ensure the electrolyzer system responds accordingly. The system linkage module provides graded early warnings for different types of impurities, triggering corresponding alarms based on impurity size, thereby alerting process personnel to potential risks. This embodiment allows for in-situ, real-time, and visual detection of the pipeline interior without large-scale disassembly, and can identify and locate unknown impurities, thus ensuring the safe and stable operation of the electrolyzer.

[0049] Specifically, a control method for a real-time detection system for impurities in electrolytic cell pipelines based on an endoscope includes the aforementioned real-time detection system for impurities in electrolytic cell pipelines; and includes the following steps:

[0050] S1: Overall system architecture construction, including building a corrosion-resistant and high-pressure-resistant online detection system to realize online monitoring, visualization and intelligent analysis of pipeline impurities;

[0051] Corrosion-resistant endoscope assembly: Probe manufacturing: The housing is made of Hastelloy C276, and the cylindrical probe is manufactured by metal injection molding (MIM). Internal integration: Optical module: Sapphire protective lens (2mm thick) + multi-spectral LED light source (400-1000nm), with an anti-corrosion and anti-reflection coating on the lens surface. Drive module: A miniature stepper motor (accuracy ±0.1mm) drives the probe to rotate 360° and move axially, compatible with tubing of DN20 and above. Corrosion-resistant treatment: The probe surface is coated with a gradient composite layer of "diamond-like carbon (DLC) coating - nickel-phosphorus alloy - Hastelloy", with a corrosion resistance life of ≥80,000 hours (30% KOH solution).

[0052] Furthermore, the inner wall of the shell structure made of Hastelloy C276 can also be integrated with cooling channels, through which circulating cooling water flows, thereby ensuring that the endoscope module 1 always operates within a suitable temperature range.

[0053] S2: Open the isolation valve 24 (optional) to connect the pipe interface structure 11 with the target pipe 14, and the endoscope module 1 moves from the pipe interface structure 11 into the target pipe 14;

[0054] Endoscopic scanning: The probe moves into the tubing, and the drive module controls the probe's axial movement (speed ≤10mm / s) and 360° rotation. Multispectral light sources provide time-division illumination (blue / green / red / near-infrared) to acquire high-resolution images of the tubing's inner wall. The fiber optic image transmission bundle transmits the images in real-time to the AI ​​analysis unit, simultaneously triggering a Raman spectroscopy module (optional) to collect impurity component data (500-2000 cm⁻¹). -1 spectrum).

[0055] S3: Impurity detection and analysis process: Endoscope module 1 enters the target pipe 14, mechanical drive module 3 controls the axial movement of the probe, pan-tilt module 10 controls the rotation of the probe for detection, multi-spectral LED light source provides fractional illumination, and high-definition images of the inner wall of the pipe are acquired; the fiber optic image bundle transmits the images to the control and processing system 5 in real time, and the control and processing system 5 performs AI analysis.

[0056] Image transmission and processing system deployment: Fiber optic link: Utilizes a 60,000-core multimode fiber image transmission bundle, resistant to electromagnetic interference, with a transmission distance ≤50m and a resolution ≥500×500 pixels. AI analysis unit: Equipped with an improved version of the YOLOv7 algorithm, the training dataset contains 10 types of impurities (metal shavings, polymers, etc.), with a recognition accuracy ≥98% and image processing latency ≤0.5 seconds.

[0057] The deep learning model on the analysis unit identifies the size, location, and type of impurities; the YOLOv7 algorithm identifies the size, location, and type of impurities (such as metal shavings and welding slag), and the material is verified by combining Raman spectroscopy data (accuracy ≥ 95%). An impurity migration dynamics model is established, and the particle trajectory is tracked based on optical flow to predict the risk of blockage (accuracy ≥ 95%).

[0058] S4: Closed-loop control and impurity handling, triggering different levels of alarms based on impurity size:

[0059] Level I risk, control actions: immediately trigger audible and visual alarms; link the electrolytic cell DCS system: cut off the anode / cathode power supply; close the upstream and downstream pneumatic ball valves of the detection point, and isolate the faulty pipeline;

[0060] Level II risk, control actions: yellow warning light flashes, heat map of impurity location pops up in the central control room; pipeline filter and self-cleaning system are activated: the material undergoes multi-stage filtration to remove impurities;

[0061] Level III risk, control actions: blue status light stays on, impurity distribution trend curve is generated on the operation interface; detection frequency is automatically adjusted.

[0062] Example 2:

[0063] In the aforementioned embodiments, the real-time monitoring system is fixedly installed on the target pipeline of the electrolyzer. Its advantage lies in the ease of sealing the control cable 4 as it passes through the equipment compartment pipe 13. However, it also has certain drawbacks: the internal space of the equipment compartment pipe 13 must be large enough to accommodate a certain length of control cable 4. The length of the control cable 4 determines the travel length of the endoscope module 1, thus limiting the endoscope's range of motion. Furthermore, the equipment compartment pipe 13 in Embodiment 1 is too large, occupying a significant amount of space, making it difficult to install in the confined space of chemical pipelines, and also hindering the upgrading of older electrolyzer hydrogen production systems. Therefore, this embodiment improves upon this by creating a real-time monitoring system that is easy to upgrade and improve the target pipeline 14, occupies less space, and is convenient for installation and disassembly.

[0064] In practical use, pressurized tapping can be performed on the target pipe 14, and pipe flanges 15 for connecting the pipe interface structure 11 can be welded and installed. The pressurized tapping can be performed on straight pipe sections or at bends, such as... Figure 2 , 3As shown, an isolation valve 24 is installed on the pipe flange 15. When no inspection is being performed, a blind flange can be installed at the isolation valve 24. If online real-time monitoring of a target pipe 14 is required, the blind flange can be removed, and the pipe interface structure 11 can be connected to the flange of the isolation valve 24. Another advantage of this embodiment is that only a small number of real-time monitoring systems are needed to perform online monitoring of many target pipes 14, thereby greatly reducing equipment costs. In actual use, the installation method of the two embodiments can be selected according to the user's needs.

[0065] Specifically, the control cable 4 extends out from the equipment compartment pipe 13 and forms a sliding seal connection with it. This sliding seal connection is not limited to axial sliding, and the control cable 4 also maintains a good sealing effect when rotating in the circumferential direction.

[0066] The control cable 4 passes through the equipment compartment pipe 13 where a multi-stage sealing structure 16 is provided; the multi-stage sealing structure 16 includes an inner seal 17, an outer seal 18, and an intermediate seal 19. The inner seal 17 is located inside the pipe interface structure 11 on the side in contact with the material, the outer seal 18 is located outside the pipe interface structure 11 on the side in contact with normal pressure, and the intermediate seal 19 is located between the inner seal 17 and the outer seal 18. In actual use, both the inner seal 17 and the outer seal 18 can adopt a structure design with multiple lip seal rings 29, and the extension direction of the lips 33 of the inner seal 17 and the outer seal 18 is set in the same direction; the intermediate seal 19 in this embodiment can adopt a normal pressure seal or a pressure seal; specifically, in the case of normal pressure sealing, a sealed chamber 30 is formed between the outer seal 18 and the inner seal 17, the upper end of the sealed chamber 30 is connected to the purge air source 31, and the lower end is connected to the drain pipe 32; the inner side of the inner seal 17 is in contact with the material, and under the pressure of the material, the lip 33 of the lip seal ring 29 is pressed and sealed on the control cable 4 to form a seal; such as Figure 4 As shown, this embodiment uses a multi-ring lip seal 29. The inner ring of the lip 33 of the seal is attached to the control cable 4, and the outer ring of the lip 33 is elastically clamped by a self-tightening spiral spring 34. The lip 33 of the lip seal 29 of the inner layer seal 17 is set towards the material side, so the lip 33 can be pressed onto the control cable 4 by the pressure of the material itself, forming a seal under the dual pressure of material pressure and elastic clamping force. Furthermore, due to the multi-ring arrangement, the sealing effect is improved while ensuring a small leakage rate.

[0067] However, since this embodiment requires the control cable 4 to enter and exit the equipment compartment pipe 13 so that the endoscope module 1 can move freely, a better sealing effect can be maintained when the cable is fixed. When the control cable 4 is inserted and removed, some material will pass through the inner seal 17 and enter the intermediate seal 19. At this time, the leaked material is discharged from the drain pipe 32 and sent to the collection tank by atmospheric pressure purging. The outer seal 18 also uses the lip 33 to seal the control cable 4. The outer seal 18 is mainly used to seal the small amount of material that leaks into the intermediate seal 19 chamber to prevent it from leaking out. When the material enters the sealing chamber 30 of the intermediate seal 19, the pressure naturally drops, so the outer seal 18 does not have to bear a large sealing pressure. The leaked material is automatically discharged from the drain pipe 32 under atmospheric pressure purging.

[0068] Because this embodiment reduces the overall size of the device, it can be installed in a relatively small pipe space. It is understood that in this embodiment, the endoscope module 1 and the imaging principle are the same as in embodiment one; however, when the endoscope module 1 moves in the pipe, it is necessary to apply auxiliary power to the control cable 4 on the outside of the multi-level sealing structure 16 to assist the control cable 4 in inserting and withdrawing into the multi-level sealing structure 16 so that the endoscope module 1 can move freely in the pipe.

[0069] The difference between this embodiment and the previous embodiment lies in the fact that, due to the need to miniaturize the overall device, the space occupied by the device compartment pipe 13 in Embodiment 1 needs to be minimized. Therefore, in this embodiment, the space inside the device compartment pipe 13 must at least accommodate the endoscope module 1. Since the endoscope module 1 is generally cylindrical, in this embodiment, the diameter of the device compartment pipe 13 can be comparable to or even smaller than the target pipe 14, and there is no need to allocate space for a larger radius winding device 26. This leads to the need to solve the sealing problem of the control cable 4 passing through the wall of the device compartment pipe 13.

[0070] Example 3:

[0071] As an improvement to Embodiment 2, a magnetic fluid 22 sealing structure 20 is provided at the sealed connection to achieve the purpose of sliding sealing of the control cable 4. In this embodiment, the magnetic fluid 22 sealing structure 20 can be set in the inner sealing layer 17 and / or the outer sealing layer 18 as needed, and the number of each sealing layer is not limited.

[0072] Specifically, the magnetic fluid 22 sealing structure 20 includes an annular sealing cavity 21, magnetic fluid 22, and an electromagnetic coil 23. The annular sealing cavity 21 is a hollow sealing ring structure in the shape of a circular ring. The hollow interior of the annular sealing cavity 21 is filled with magnetic fluid 22. It can adopt a stepped 35-type annular cavity design, with its inner diameter matching the diameter of the control cable 4, tolerance +0.05mm, and an axial length of 15mm as an example. The cavity wall thickness is 1.5mm. The magnetic fluid 22 filled in the cavity is specifically: nano Fe3O4 colloid, particle size 10nm, concentration 30vol% + perfluoropolyether base liquid + fluorocarbon surfactant. Viscosity 500cP, density 1.8g / cm³ 3 It can be stably dispersed for ≥1 year in an environment with pH 0-14. Filling volume: 80-90% of the cavity volume, with 10-20% space reserved to accommodate volume changes when cables enter and exit.

[0073] like Figure 5 As shown, the stepped 35 design of the annular sealing cavity 21 can have one side as a vertical wall and the other side as a stepped 35 wall. In actual use, a composite stepped 35 sealing cavity can be formed by combining a deformable flexible material with a relatively hard material 36, thus giving the stepped 35 a certain deformation performance. Hard material 36 is placed inside the vertical wall and within the vertical steps 35, so that when the stepped 35 side deforms, the horizontal step 35, which was originally not in contact with the control cable 4, moves radially towards the center along the control cable 4 after deformation. The contact area between the annular sealing cavity 21 and the control cable 4 is increased, further improving the sealing effect. It can be understood that its deformation can be achieved by replenishing the magnetic fluid 22 inside. Specifically, a magnetic fluid 22 replenishment system can be added to the annular sealing cavity 21, and an automatic liquid replenishment module 38 can be set on the outside and connected to the inside of the annular sealing cavity 21 through a capillary tube 37. Before opening the isolation valve 24 after the equipment is installed, the replenishment amount of magnetic fluid 22 can be appropriately increased or decreased according to the pressure in the target pipeline 14, so that it can easily enter and exit the annular sealing cavity 21 when it is liquid.

[0074] The electromagnetic coil 23 is a toroidal spiral coil with windings. The conductor material is Φ0.1mm nickel-chromium alloy enameled wire (corrosion resistant, temperature resistant to 200℃), and the insulation layer is polyimide. The DC resistance is approximately 50Ω. The electromagnetic coil 23 is sleeved on the outer circumference of the annular sealing cavity 21. Its axial length matches the number of annular sealing cavities 21. For example, if three annular sealing cavities 21 are set at the inner seal 17 position, with an axial length of 15mm, and one electromagnetic coil 23 corresponds to three annular sealing cavities 21, then the axial length of the electromagnetic coil 23 is no less than 45mm. If the spacing between the three annular sealing cavities 21 is considered, the axial length of the electromagnetic coil 23 needs to be increased accordingly. Of course, a one-to-one design between the annular sealing cavity 21 and the electromagnetic coil 23 can also be used.

[0075] The principle of this embodiment is based on the control effect of a magnetic field on the magnetic fluid 22. By controlling the magnetic field strength with current, the sealing performance of the magnetic fluid 22 can be dynamically adjusted, thereby forming a dynamic seal. The magnetic field strength can be changed by adjusting the current, thus controlling the sealing performance of the magnetic fluid 22. When there is no magnetic field, the magnetic fluid 22 is in a liquid state and can flow freely, allowing cables to easily enter and exit. When the electromagnetic coil 23 is energized to generate a magnetic field, the magnetic particles are oriented in the magnetic field, forming a "chain structure," which causes the viscosity of the magnetic fluid 22 to increase sharply, presenting a semi-solid state. This fills the gap between the cable and the sealing cavity, forming a liquid sealing ring, preventing high-pressure materials in the pipeline from leaking out. By adjusting the appropriate current, the cable 4 can be controlled to enter and exit while minimizing the amount of material leaking into the intermediate seal 19.

[0076] Furthermore, in this embodiment, the electromagnetic coil 23, pressure sensor, and PID controller form a closed-loop control system: the pressure sensor is installed on the target pipeline 14, and monitors the pressure inside the pipeline in real time. When the pressure is high, the PID controller automatically increases the coil current, strengthens the magnetic field, and causes the sealing pressure of the magnetic fluid 22 to rise synchronously, offsetting the pressure increase inside the pipeline and preventing material leakage; when the pressure is low, the coil current decreases, the magnetic fluid 22 returns to a low-viscosity state, reduces the resistance of cable movement, and achieves pressure-adaptive sealing. Preferably, the electromagnetic coil 23 adopts a ring-shaped spiral winding, and is used in conjunction with a conical magnetic pole shoe to guide the magnetic field, so that a strong magnetic field gradient is formed at the sealing gap, with a gradient value of up to 500kA / m. 2 This ensures that the magnetorheological fluid 22 forms a uniform and stable sealing layer in the radial direction (cable radial direction), avoiding the risk of leakage due to uneven magnetic field distribution.

[0077] Initially, magnetic fluid 22 is injected into the stepped 35-type annular cavity, with a filling volume of 80% as an example, ensuring that the liquid is evenly distributed in the gap between the cable and the cavity, with a gap of 0.1-0.3mm. Low-speed cable entry and exit are allowed. During dynamic sealing control, the pressure sensor monitors the pipeline pressure in real time with an accuracy of 0.1% FS. When the pressure increases, the PID controller automatically increases the current of the electromagnetic coil 23 to enhance the magnetic field strength. The magnetic fluid 22 radially compresses the cable, forming a "liquid sealing ring" with a pressure resistance ≥10MPa.

[0078] In this embodiment, the system debugging and experimentation include: sealing performance testing, corrosion resistance testing, and detection accuracy verification.

[0079] The sealing performance test involves applying a water pressure of 10 MPa within a simulated pipeline for 24 hours, and monitoring for a leakage rate of <10%. -9 Pa・m 3 / s; leakage rate <10 when the cable moves axially (5mm / s) and rotates (100rpm). -9 Pa・m 3 / s.

[0080] The corrosion resistance test involves immersing the probe in a 30% KOH solution and running it continuously for 8000 hours. The coating weight loss rate is <0.01%, and the decrease in optical transmittance is <3%.

[0081] The detection accuracy verification included placing 0.2mm metal chips in a simulated pipeline, with a system recognition rate of ≥98%; in a multi-impurity mixed scenario, the detection speed was ≥25fps, and the anti-bubble interference rate was ≥95%.

[0082] Example 4:

[0083] As an improvement, the integrated optical module 2 and the mechanical drive module 3 are designed to be detachably connected, such as... Figure 6 , 7 As shown, this allows the endoscope module 1 to be adapted to target pipes 14 with various diameter ranges, requiring only the replacement of different mechanical drive modules 3, while the integrated optical module 2 does not need to be replaced, further reducing equipment procurement costs.

[0084] Specifically, the mechanical drive module 3 includes a sleeve portion 6, and the integrated optical module 2 is detachably installed inside the sleeve portion 6. The sleeve portion 6 has a traveling wheel 8 connected to a swing arm structure 7 on its outer circumference. The swing arm structure 7 and the traveling wheel 8 support the sleeve portion 6 in the target pipe 14. The expansion range of the swing arm structure 7 controls the circumferential trajectory of the traveling wheel 8 to match the pipe diameter of the target pipe 14. In this embodiment, the swing arm structure 7 is designed based on a scissor structure, with two swing arm rods 39 hinged in the middle. One swing arm rod 39 is hinged to the sleeve portion 6 at its end, and the other swing arm rod 39 is hinged to an axial moving ring 40. The axial moving ring 40 can be externally controlled to adjust its position adaptably to the pipe diameter. The other end of the swing arm rod 39 is a power-driven traveling wheel 8. Thus, by moving the axial moving ring 40, the deformation of multiple surrounding swing arm structures 7 is simultaneously changed, making it suitable for pipes of various diameters within a certain range.

[0085] Furthermore, the integrated optical module 2 includes a positioning base 9 and a gimbal module 10. The gimbal module 10 is mounted on one axial end of the positioning base 9, and the other end is connected to a control cable 4. The gimbal module 10 extends out of one end of the sleeve portion 6. The positioning base 9 is fixed inside the sleeve portion 6, and the gimbal module 10 can monitor the inside of the target pipe 14 by rotating.

[0086] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An endoscope-based real-time detection system for impurities in a cell line, characterized in that, Includes an endoscope module and a pattern transmission and processing system; the endoscope module is controlled to move within the target tube; The endoscope module includes an integrated optical module and a mechanical drive module. The integrated optical module includes a positioning base and a gimbal module. The integrated optical module and the mechanical drive module are detachably connected. The mechanical drive module includes a sleeve portion. The integrated optical module is detachably installed inside the sleeve portion. The outer circumference of the sleeve portion is provided with a traveling wheel connected by a swing arm structure. The swing arm structure and the traveling wheel support the sleeve portion in the target pipe. The expansion range of the swing arm structure controls the outer tangent circle trajectory of the traveling wheel to match the pipe diameter of the target pipe. The pattern transmission and processing system includes a control cable and a control processing system. The control cable includes a signal cable and an optical fiber image transmission bundle. One end of the control cable is connected to the endoscope module.

2. An endoscope-based real-time detection system for impurities in electrolyzer piping according to claim 1, characterized in that, The positioning base has a gimbal module at one axial end and a control cable connected to the other end, with the gimbal module extending out of one end of the sleeve.

3. An endoscope-based real-time detection system for impurities in electrolyzer piping according to claim 1, characterized in that, It also includes a device compartment pipe with a flange opening at one end, the space inside the device compartment pipe being at least sufficient to accommodate the endoscope module; control cables exit from the device compartment pipe and are sealed to it; The target pipeline is provided with a pipeline flange that mates with the flange opening. The pipeline flange includes a flange interface that is pre-installed or formed by a pressurized opening on the target pipeline.

4. The endoscope-based real-time detection system for impurities in electrolyzer piping according to claim 3, characterized in that, The equipment compartment pipeline has a multi-stage sealing structure at the point where the control cable passes through; the multi-stage sealing structure includes an inner seal, an outer seal, and an intermediate seal. The inner seal is located inside the pipeline interface structure on the side in contact with the material, the outer seal is located outside the pipeline interface structure on the side in contact with normal pressure, and the intermediate seal is located between the inner seal and the outer seal.

5. The real-time impurity detection system for electrolytic cell pipelines based on an endoscope according to claim 3, characterized in that, The sealed connection is provided with a magnetic fluid sealing structure, including an annular sealing cavity, magnetic fluid, and an electromagnetic coil. The annular sealing cavity is a hollow sealing ring structure in the shape of a circle. The hollow interior of the annular sealing cavity is filled with magnetic fluid, and an electromagnetic coil is set on the outer periphery of the annular sealing cavity. The current of the electromagnetic coil is controlled to change the magnetic field strength and adjust the sealing strength of the annular sealing cavity for the control cable.

6. The real-time impurity detection system for electrolytic cell pipelines based on an endoscope according to claim 1, characterized in that, The gimbal module integrates a multispectral LED light source and a corrosion-resistant endoscope probe. The inner wall of the endoscope module's outer shell structure integrates a cooling channel, within which circulating cooling water flows.

7. The real-time impurity detection system for electrolytic cell pipelines based on an endoscope according to claim 1, characterized in that, The target pipeline includes the inlet or outlet pipeline of the electrolytic cell.

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