A detection system and method for hydrogen content inside a dynamic cable core

Abstract

This invention relates to the field of testing equipment, and in particular to a system and method for detecting the hydrogen content inside a dynamic cable core. The testing system includes: a marine environment simulation chamber with cover plates on both sides; each cover plate has a through-hole for the dynamic cable to pass through; a sealing cover, placed outside the marine environment simulation chamber, and connected to a first hydrogen content detector; a hydrogen detection container, located on the cover plate near the marine environment simulation chamber; the dynamic cable passes through the cover plate and extends into the hydrogen detection container; and a second hydrogen content detector connected to the hydrogen detection container. This invention uses the above setup to study the amount of hydrogen generated and its permeation effect on the dynamic cable core.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and in particular to a system and method for detecting the hydrogen content inside a dynamic cable core. Background Technology

[0002] Currently, dynamic cables, as core power transmission and communication components connecting marine equipment to land or offshore platforms, are widely used in marine engineering fields such as offshore wind power, offshore oil and gas exploration, and deep-sea observation networks. With the accelerated global energy transition, the offshore wind power industry is showing a trend towards large-scale and deep-sea development, and the commercialization of floating wind power projects is further driving a surge in demand for dynamic cables. At the same time, the increased exploration and development of deep-sea oil and gas resources is also creating an urgent need for dynamic cables adapted to ultra-deep water and long-distance applications. Against this backdrop, dynamic cable technology is iterating and upgrading towards higher voltage levels, larger capacity transmission, and resistance to extreme fatigue, driving the continuous expansion of the global dynamic cable market.

[0003] In typical application scenarios such as deep-sea and floating wind power, dynamic cables generally adopt a wet structure design. Its core technical feature is that overflow holes are set on the inner and outer sheaths of the cable body, so that seawater can freely seep in and fill the gaps in the core layer.

[0004] However, wet-structure design also presents significant technical challenges and application risks, primarily including electrochemical corrosion, insulation degradation, marine organism adhesion, and difficulties in subsequent maintenance. Among these, the electrochemical corrosion of the armored steel wires is particularly prominent: in the complex electrolyte environment of seawater immersion, the armored steel wires and other metal components of the cable easily form galvanic cells, triggering electrochemical corrosion and generating large amounts of hydrogen gas. The accumulation of hydrogen not only accelerates the embrittlement and fracture of the armor layer but may also penetrate into the insulation layer, damaging its insulation performance and seriously threatening the safe operation and service life of the dynamic cable. Currently, several owners of floating wind power projects have expressed clear concerns about this issue, urgently requiring the development of targeted corrosion detection methods, online monitoring equipment, and efficient prevention and control technologies to ensure the long-term stable operation of the projects. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art, thereby providing a detection system and method for detecting the hydrogen content inside a dynamic cable core.

[0006] Firstly, a system for detecting the hydrogen content inside a dynamic cable core is provided, comprising:

[0007] The marine environment simulation chamber has cover plates on both sides; and the cover plates have through holes for dynamic cables to pass through.

[0008] A sealed cover is installed outside the marine environment simulation chamber and is connected to a first hydrogen content detector;

[0009] A hydrogen detection container is provided with a cover plate on one side near the marine environment simulation chamber; the dynamic cable passes through the cover plate and extends into the hydrogen detection container.

[0010] The second hydrogen content detector is connected to the hydrogen detection container.

[0011] In one embodiment of the present invention, a pressure regulating module connected to the marine environment simulation chamber is further included; the pressure regulating module is configured to regulate the pressure inside the marine environment simulation chamber.

[0012] In one embodiment of the present invention, the pressure regulating module includes a booster connected to the marine environment simulation chamber via a pipeline and a pressure pump connected to the booster via a pipeline; the pipeline between the booster and the marine environment simulation chamber is provided with at least one control valve, and the pipeline between the booster and the pressure pump is provided with a control valve.

[0013] In one embodiment of the present invention, a pressure gauge is further provided in the pipeline between the booster and the pressure pump.

[0014] In one embodiment of the present invention, the pressure regulating module further includes a pressure regulating mechanism and an air compressor connected to the booster via a pipeline; the pressure regulating mechanism and the air compressor are connected in parallel.

[0015] In one embodiment of the present invention, the pipeline between the pressure regulating mechanism and the air compressor and the booster is provided with a fifth control valve and a sixth control valve.

[0016] In one embodiment of the present invention, the pressure regulating mechanism and the air compressor are further provided with a pressure sensor.

[0017] In one embodiment of the present invention, a salt water solution of a preset concentration is introduced into the marine environment simulation chamber.

[0018] In one embodiment of the present invention, the marine environment simulation chamber is equipped with a temperature sensor.

[0019] Secondly, a detection method is provided, utilizing the aforementioned detection system for the hydrogen content inside a dynamic cable core, comprising the following steps:

[0020] S1. Place the pre-treated dynamic cable into the marine environment simulation chamber; wherein, the end of the dynamic cable with water-blocking measures for the core passes through the marine environment simulation chamber, and multiple cores of the dynamic cable extend out after passing through the cover plate.

[0021] S2. A sealing cover is installed on the outer shell of the marine environment simulation chamber. The sealing cover is connected to a first hydrogen content detector. The first hydrogen content detector is used to determine whether the marine environment simulation chamber is leaking. If so, the marine environment simulation chamber is resealed. If not, proceed to step S3.

[0022] S3. Fill the marine environment simulation chamber with salt water of a preset concentration, measure and record the salinity of the salt water using a salinity meter, and at the same time, pressurize the marine environment simulation chamber to the water depth required for the dynamic cable application; turn on the first and second hydrogen content detectors, record the initial hydrogen content value and reset it to zero, and then continuously monitor the hydrogen value and water pressure value for at least 3 days.

[0023] S4. After the experiment, record the values ​​of the first hydrogen content detector and the second hydrogen content detector. The value of the first hydrogen content detector should be close to or 0, indicating that there is basically no hydrogen influence at the core and there is no safety risk when the dynamic cable is running normally. The value of the second hydrogen content detector should be greater than the initial value, indicating the amount of hydrogen produced after the salt water reacts with the armored steel wire of the dynamic cable.

[0024] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0025] The detection system for hydrogen content inside the dynamic cable core described in this invention is the first to accurately couple and simulate fatigue damage and electrochemical corrosion. In a controlled experimental environment, the actual reaction sequence of "fatigue damage first, then seawater corrosion" of the dynamic cable was carried out sequentially and in a related manner. This not only improves the consistency between the experimental environment and the operating conditions, but also greatly enhances the guiding significance and reliability of the corrosion rate and hydrogen generation data obtained from this experiment for practical engineering applications. Furthermore, it greatly improves the depth and accuracy of understanding the corrosion failure mechanism of dynamic cables.

[0026] The detection system for hydrogen content inside the core of a dynamic cable described in this invention provides a method for quantitatively studying hydrogen generation: it can accurately measure the rate and total amount of hydrogen generated by seawater corrosion of steel wire under given conditions such as fatigue damage degree of dynamic cable, seawater salinity, and seawater pressure, providing accurate quantitative data for assessing the risk of hydrogen embrittlement and hydrogen explosion inside the cable during actual engineering applications, and realizing a combination of qualitative analysis and quantitative prediction.

[0027] The hydrogen content detection system inside the dynamic cable core described in this invention enables a refined assessment of the damage tolerance of armored galvanized steel wire. This experiment studies the residual protective effectiveness and failure process of galvanized steel wire after fatigue damage in dynamic cables, scientifically defines the permissible fatigue damage of galvanized steel wire and the lifespan of dynamic cables after damage, and provides a scientific basis for formulating acceptance standards, operational testing, and maintenance and replacement standards for dynamic cables.

[0028] The detection system for hydrogen content inside the dynamic cable core described in this invention provides a method for selecting armored galvanized steel wire materials: it can compare various galvanized steel wires with different zinc layer thicknesses, different sizes, and different base materials to screen the steel wire material most suitable for the dynamic cable under this working condition, reducing trial and error costs and accelerating the application of new materials and new processes.

[0029] The detection system for hydrogen content inside the core of a dynamic cable described in this invention promotes the improvement of relevant testing standards in the dynamic cable industry: it provides a complete, reproducible and data-rich testing method, and is expected to become a new dynamic cable testing item in IEC or CIGRE standards, serving as a benchmark test for dynamic cables. Attached Figure Description

[0030] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the detection system for the hydrogen content inside the dynamic cable core in this invention.

[0032] Figure 2 This is a schematic diagram illustrating the detection of hydrogen content inside the dynamic cable core in this invention.

[0033] Figure 3 This is a cross-sectional view of the dynamic cable in this invention;

[0034] Figure 4 This is a cross-sectional view of a single wire core in this invention;

[0035] Figure 5 This is a schematic diagram illustrating the actual detection of hydrogen content inside the dynamic cable core in this invention.

[0036] Explanation of reference numerals on the accompanying drawings:

[0037] 10. Marine environment simulation chamber; 101. Cover plate; 102. Water-blocking seal; 103. Saltwater;

[0038] 20. Hydrogen detection container;

[0039] 30. Second hydrogen content detector;

[0040] 40. Voltage booster;

[0041] 50. Pressure regulating mechanism;

[0042] 60. Air compressor;

[0043] 70. Pressure gauge;

[0044] 80. Pressure pump;

[0045] 901. Temperature sensor; 902. Pressure sensor; 903. First control valve; 904. Second control valve; 905. Third control valve; 906. Fourth control valve; 907. Fifth control valve; 908. Sixth control valve;

[0046] 100. Dynamic cable; 1001. Core wire; 1002. Water-blocking cap. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0048] In the traditional wet structure design of dynamic cables, the overflow holes on the inner and outer sheaths allow seawater to freely seep in and fill the gaps between the core layers. This causes the armored steel wires and other metal components of the cable to form galvanic cells in the electrolyte environment, leading to electrochemical corrosion. The accumulation of hydrogen generated during corrosion accelerates the embrittlement and fracture of the armor layer and may penetrate into the insulation layer, damaging the insulation performance. This affects the safe operation and service life of the dynamic cable, with key performance indicators including deterioration of mechanical strength and decrease in insulation reliability.

[0049] For example, in the deep-sea application scenario of floating wind power projects, the dynamic cable connects the floating platform to the submarine cable. When its armored steel wires are immersed in seawater, they come into direct contact with the copper conductor, forming an electrochemical corrosion circuit. The hydrogen gas generated by corrosion accumulates in the gaps between the armor layers, causing local pressure to rise and triggering the propagation of microcracks. At the same time, hydrogen molecules penetrate into the cross-linked polyethylene insulation layer, leading to a decrease in insulation performance, which may in turn cause power transmission interruption. The water-blocking measures of the dynamic cable core cannot effectively prevent hydrogen migration, making the problem even more prominent in the high-pressure deep-water environment.

[0050] If the aforementioned hydrogen problem is not resolved, the electrochemical corrosion process will continue, the mechanical strength of the armor layer will gradually deteriorate, and it may eventually lead to the breakage of the dynamic cable. At the same time, the penetration of hydrogen into the insulation layer will accelerate insulation aging, increase the probability of short circuit faults, and seriously threaten the long-term stable operation of marine engineering systems. Among these, the safety hazards of the dynamic cable will continue to accumulate as the operating time increases.

[0051] Furthermore, to accurately monitor hydrogen production, it is necessary to construct a detection condition that simulates a marine environment. The marine environment simulation chamber is set up to contain the dynamic cable and circulate salt water to reproduce the corrosion process under actual working conditions. A sealing cover is configured to cover the outside of the marine environment simulation chamber to detect external hydrogen leakage. A hydrogen detection container is positioned on one side of the marine environment simulation chamber to capture hydrogen escaping from the end of the cable core, thereby achieving zoned monitoring of hydrogen content.

[0052] Specifically, a system for detecting the hydrogen content inside a dynamic cable core includes:

[0053] The marine environment simulation chamber 10 has cover plates 101 on both sides; and the cover plates 101 have through holes for the dynamic cable 100 to pass through.

[0054] A sealed cover is installed outside the marine environment simulation chamber 10 and is connected to a first hydrogen content detector;

[0055] The hydrogen detection container 20 is installed on a cover plate near the side of the marine environment simulation chamber 10; the dynamic cable 100 passes through the cover plate 101 and extends into the hydrogen detection container 20.

[0056] The second hydrogen content detector 30 is connected to the hydrogen detection container 20.

[0057] For ease of understanding, the following explains some key terms in this embodiment:

[0058] The dynamic cable core internal hydrogen content detection system is designed to simulate a marine environment and monitor and assess the hydrogen content generated inside or around the core of the dynamic cable 100 when it is immersed in it. This system aims to provide a means to determine the corrosion status and potential safety risks of the dynamic cable 100.

[0059] The marine environment simulation chamber 10 is a sealed space used to simulate marine environmental conditions. This chamber 10 can accommodate the dynamic cable 100 to be tested and can introduce seawater or brine 103 as needed to replicate the immersion environment the dynamic cable 100 may face in actual marine applications. Covers 101 on both sides seal the chamber 10 and provide interfaces through which the dynamic cable 100 passes.

[0060] The cover plate 101 is a sealing component on both sides of the marine environment simulation chamber 10. It has through holes to allow the dynamic cable 100 to pass through, thereby placing part of the dynamic cable 100 inside the simulation chamber 10 and extending the other part to the outside. The design of the cover plate 101 ensures the airtightness of the internal environment of the simulation chamber 10.

[0061] The dynamic cable 100 is the object of this detection system and is typically used to connect marine equipment to land or offshore platforms for power transmission or communication. During the detection process, a portion of the dynamic cable 100 is placed inside the simulation chamber 10, while its core extends into the hydrogen detection container 20 to detect hydrogen inside or around the core.

[0062] A sealing cover is installed outside the marine environment simulation chamber 10, forming a relatively enclosed space. The main function of this sealing cover is to assist in testing the airtightness of the marine environment simulation chamber 10, prevent internal gas leakage, and provide a testing environment for the first hydrogen content detector.

[0063] The first hydrogen content detector, connected to the sealed enclosure, is used to detect the hydrogen content inside the enclosure. By monitoring the hydrogen concentration in this area, it can be determined whether there is any leakage in the marine environment simulation chamber 10, thereby ensuring the accuracy and reliability of the experimental environment.

[0064] A hydrogen detection container 20 is positioned near the cover plate on one side of the marine environment simulation chamber 10. After the dynamic cable 100 passes through the cover plate 101, its core extends into the container 20. The container 20 is designed to collect and contain hydrogen escaping from or around the core of the dynamic cable 100, providing a detection medium for the second hydrogen content detector 30.

[0065] The second hydrogen content detector 30, connected to the hydrogen detection container 20, is used to accurately measure the hydrogen content inside the hydrogen detection container 20. This detector 30 is a key component for assessing the corrosion status of the core of the dynamic cable 100, and its measurement results directly reflect the amount of hydrogen generated by the dynamic cable 100 in a simulated marine environment.

[0066] This embodiment provides a detection system for the hydrogen content inside a dynamic cable core, and its main components and functions are described in detail below.

[0067] First, the system includes a marine environment simulation chamber 10. This chamber 10 is designed as a sealed cavity to simulate the immersion conditions of a dynamic cable 100 in a real marine environment. To facilitate the introduction and removal of the dynamic cable 100, the marine environment simulation chamber 10 has cover plates 101 on both sides. These cover plates 101 are configured as detachable or openable structures, for example, by bolts or snap-fit ​​connections, to ensure the airtightness of the simulation chamber 10. Each cover plate 101 has a through-hole for the dynamic cable 100 to pass through. The size and shape of this through-hole are designed to allow the dynamic cable 100 to pass through, while simultaneously ensuring an effective seal between the cable and the cover plate 102 (e.g., a rubber sealing ring or a compression sealing sleeve) to maintain the experimental environment inside the simulation chamber 10. For example, the marine environment simulation chamber 10 can be a cylindrical or rectangular container made of corrosion-resistant materials (such as stainless steel or specific engineering plastics), with its cover 101 connected by a flange and sealed with a gasket, and the through holes fixed and sealed by a pressure-sealed structure for the dynamic cable 100.

[0068] Secondly, the system also includes a sealing cover, which is installed outside the marine environment simulation chamber 10. The function of this sealing cover is to form a relatively sealed external space for monitoring the overall sealing condition of the marine environment simulation chamber 10. This sealing cover can be a flexible material, such as a polymer film, or a rigid structure, such as a shell welded from transparent plastic or metal sheets. The sealing cover is connected to a first hydrogen content detector. This first hydrogen content detector is configured to detect the hydrogen concentration inside the sealing cover in real time or periodically. By monitoring the hydrogen content in this area, it is possible to determine whether there is a gas leak in the marine environment simulation chamber 10, thereby ensuring the accuracy of the experimental results. For example, the sealing cover can be a transparent plexiglass cover that completely covers the marine environment simulation chamber 10, with its internal space connected to the first hydrogen content detector via a pipe. This detector can be an electrochemical hydrogen sensor, whose output signal is used to indicate whether there is a hydrogen leak.

[0069] Furthermore, the system includes a hydrogen detection container 20. This hydrogen detection container 20 is positioned near the cover plate 101 on one side of the marine environment simulation chamber 10. After the dynamic cable 100 passes through the through-hole in the cover plate 101, its core portion or a specific detection area extends into the hydrogen detection container 20. The hydrogen detection container 20 is designed to collect and contain hydrogen escaping from the core of the dynamic cable 100 or its interface with the environment. The container 20 can be a small, sealed cavity, with its connection to the dynamic cable 100 effectively sealed to prevent external air from entering or internal hydrogen from escaping. For example, the hydrogen detection container 20 can be a small glass or metal container, with one end connected to the through-hole in the cover plate 101 via a sealed joint, and the other end through which the portion of the dynamic cable 100 to be detected is introduced.

[0070] Finally, the system also includes a second hydrogen content detector 30. This second hydrogen content detector 30 is connected to the hydrogen detection container 20. The detector 30 is configured to accurately measure the hydrogen content inside the hydrogen detection container 20. This measurement directly reflects the amount of hydrogen generated inside or around the core of the dynamic cable 100 due to corrosion or other reasons in a simulated marine environment. The second hydrogen content detector 30 can be a highly sensitive hydrogen sensor, such as a semiconductor or catalytic combustion sensor, capable of accurately detecting trace amounts of hydrogen and transmitting the detected data to a data processing unit for recording and analysis. For example, the second hydrogen content detector 30 is connected to the hydrogen detection container 20 through a sampling port and can continuously monitor the changing trend of hydrogen concentration inside the container 20.

[0071] This embodiment further proposes that the above-mentioned detection system also includes a pressure regulating module connected to the marine environment simulation chamber 10; the pressure regulating module is configured to regulate the pressure inside the marine environment simulation chamber 10.

[0072] The pressure regulation module is a device or system used to control and maintain the internal pressure of a specific space (here, the marine environment simulation chamber 10). Its core function is to increase, decrease, or stabilize the internal pressure according to preset values ​​or experimental requirements. This module can be a closed-loop system consisting of a pump, valves, pressure sensors, and a controller. The pump injects or discharges fluids (such as water or gas) into the marine environment simulation chamber 10, and the sensors monitor the pressure in real time. The controller adjusts the operation of the pump and valves based on feedback signals to achieve the target pressure. The introduction of this module enables the marine environment simulation chamber 10 to simulate hydrostatic pressure at different water depths, thus more realistically reproducing the stress state and hydrogen diffusion conditions of the dynamic cable 100 in a real marine environment. Adjusting the pressure within the marine environment simulation chamber 10 aims to simulate the external pressure experienced by the dynamic cable 100 at different water depths. In a real marine environment, the deeper the water, the greater the hydrostatic pressure, which affects the material properties, sealing integrity, and hydrogen permeation and diffusion behavior of the dynamic cable 100. By adjusting the pressure within the marine environment simulation chamber 10, various operating conditions from shallow to deep sea can be simulated, thereby comprehensively evaluating the hydrogen generation and migration characteristics of the dynamic cable 100 under different pressure conditions. This can be achieved by injecting pressurized liquid (such as brine) or gas into the marine environment simulation chamber 10 and precisely controlling the injection volume and rate to gradually increase the internal pressure to the target value. Alternatively, an external pressure source (such as a high-pressure pump or gas cylinder) can be connected, and a precision pressure regulating valve can be used to introduce pressurized medium into the marine environment simulation chamber 10, while pressure fine-tuning and maintenance are performed through a pressure relief valve or reflux system.

[0073] This embodiment introduces a pressure regulation module into the existing hydrogen detection system and connects it to the marine environment simulation chamber 10, thereby enabling the system to regulate the internal pressure of the chamber. During experiments, the pressure regulation module can precisely increase, decrease, or maintain the pressure within the marine environment simulation chamber 10 according to preset experimental conditions to simulate the hydrostatic pressure experienced by the dynamic cable 100 at different water depths. For example, when simulating a deep-sea environment, the pressure regulation module increases the pressure within the chamber; when simulating a shallow-sea environment, it decreases or maintains a lower pressure. This pressure simulation mechanism makes the physical environment of the dynamic cable 100 within the marine environment simulation chamber 10 closer to actual working conditions, thus more realistically reflecting the generation, permeation, and diffusion behavior of hydrogen under different pressure conditions. By combining the pressure regulation module with the existing hydrogen detection system, not only can the hydrogen content be detected, but the impact of pressure on hydrogen behavior can also be assessed, providing more comprehensive data support for the performance evaluation of the dynamic cable 100.

[0074] This embodiment further describes the specific structure of the pressure regulating module, which includes a booster 40 connected to the marine environment simulation chamber 10 via a pipeline and a pressure pump 80 connected to the booster 40 via a pipeline. The pipeline between the booster 40 and the marine environment simulation chamber 10 is equipped with a first control valve 903 and a second control valve 904, and the pipeline between the booster 40 and the pressure pump 80 is equipped with a third control valve 905.

[0075] Specifically, the booster 40 is a device capable of raising low-pressure fluid to a high-pressure state. In the detection system, the booster 40 is used to further increase the pressure generated by the pressure pump 80 to meet the requirements of simulating the high-pressure environment of the deep sea within the marine environment simulation chamber 10. The booster 40 can be a gas-liquid booster pump, which uses compressed air to drive a piston to boost the liquid to a higher pressure; or it can be a hydraulic booster, which utilizes the incompressibility of hydraulic oil for pressurization.

[0076] The pressure pump 80 is a device capable of providing fluid pressure. As a pressure source, the pressure pump 80 provides the booster 40 with an initial fluid of a certain pressure, and is the power core of the entire pressure regulation system. The pressure pump 80 can be a plunger pump, which generates high-pressure fluid through the reciprocating motion of the piston; or it can be a gear pump, which pushes the fluid from the suction port to the discharge port through the meshing of gears.

[0077] The first control valve 903, the second control valve 904, and the third control valve 905 are devices used to regulate fluid flow rate, pressure, or direction. The first control valve 903 and the second control valve 904, located between the booster 40 and the marine environment simulation chamber 10, are used to precisely control the fluid pressure and flow rate entering the marine environment simulation chamber 10, thereby achieving fine regulation and stable maintenance of the pressure within the chamber, and can disconnect the connection when necessary. This control valve can be a shut-off valve, controlling the fluid flow and shut-off through the raising and lowering of the valve disc; or it can be a solenoid valve, controlling the opening or closing of the valve through an electrical signal. Similarly, the third control valve 905, located between the booster 40 and the pressure pump 80, is used to control the flow of fluid from the pressure pump 80 to the booster 40, thereby controlling the operating state of the booster 40 and achieving effective management and safety assurance of the entire pressurization process. This control valve can also be a ball valve or a needle valve, etc.

[0078] In this embodiment, an initial pressure source is provided by a pressure pump 80, which then supplies pressurized fluid to a booster 40. The booster 40 further amplifies this pressure to achieve the required high-pressure environment within the marine environment simulation chamber 10. Control valves are strategically positioned between the pressure pump 80 and the booster 40, and between the booster 40 and the marine environment simulation chamber 10. These control valves precisely regulate fluid flow and pressure. By opening, closing, or partially opening these valves, the system can accurately control the rate of pressure increase, maintain a stable target pressure, or release pressure as needed. This staged pressure generation and precise control mechanism ensures that the marine environment simulation chamber 10 can reliably simulate various deep-sea pressure conditions, which is crucial for accurately evaluating the performance of the dynamic cable 100 under stress.

[0079] This embodiment further proposes that a pressure gauge 70 is also provided in the pipeline between the booster 40 and the pressure pump 80.

[0080] The pressure gauge 70 is an instrument used to measure and display fluid pressure. Its function is to provide real-time numerical feedback of pressure within pipelines, allowing operators to intuitively understand the current pressure status. The pressure gauge 70 can be implemented in various ways. For example, a mechanical pressure gauge can be used, where an internal elastic element (such as a Bourdon tube, diaphragm, or capsule) deforms under pressure, and a precision mechanical transmission mechanism drives a pointer to indicate the corresponding pressure value on a dial. This type of pressure gauge has advantages such as simple structure, no need for external power supply, and high reliability. Alternatively, an electronic pressure gauge can be used, which integrates a pressure sensor that converts the measured pressure signal into an electrical signal. After processing and amplification by internal circuitry, the pressure value is displayed digitally on a digital display screen. Electronic pressure gauges typically have higher measurement accuracy, faster response speed, and can be easily integrated with data acquisition systems to achieve remote monitoring and data recording.

[0081] This embodiment further proposes that the pressure regulating module also includes a pressure regulating mechanism 50 and an air compressor 60 connected to the booster 40 via a pipeline; the pressure regulating mechanism 50 and the air compressor 60 are connected in parallel.

[0082] The pressure regulating mechanism 50 is a device used to precisely control and maintain a specific pressure level. Its function is to receive pressure from a gas source and stably output it to a preset pressure value to meet the system's requirement for stable gas pressure. For example, the pressure regulating mechanism 50 can be a proportional pressure regulating valve whose output pressure is controlled by an electrical signal, or a precision pressure reducing valve with a feedback loop that can automatically adjust according to real-time pressure changes.

[0083] An air compressor 60 is a mechanical device that compresses air to increase its pressure. Its main function is to provide a high-pressure air source as the power source for the entire pressure regulation system. Air compressors 60 can be of various types, such as reciprocating compressors, which compress air through the reciprocating motion of a piston; or screw compressors, which continuously compress air through the rotation of a screw, to meet different flow and pressure requirements.

[0084] The parallel connection between the pressure regulating mechanism 50 and the air compressor 60 and the booster 40 means that they can independently or collaboratively supply air to the booster 40 or regulate its pressure. This connection allows the system to provide a high-pressure air source while simultaneously enabling precise management of the air source pressure through the pressure regulating mechanism 50, thereby providing the booster 40 with a more stable and controllable input pressure.

[0085] This embodiment constructs a more complete and flexible pressure regulation system by connecting the pressure regulating mechanism 50 and the air compressor 60 in parallel to the booster 40. Specifically, the air compressor 60, as a high-pressure air source, is responsible for generating and providing the required compressed air. Part of this compressed air can be directly delivered to the booster 40 to provide basic pressurization capacity; the other part is processed by the pressure regulating mechanism 50. The pressure regulating mechanism 50 can precisely regulate the pressure of the compressed air from the air compressor 60, ensuring that the gas pressure delivered to the booster 40 is stable and meets preset requirements. Through this parallel configuration, the booster 40 can receive a precisely regulated and stable air source, thereby enabling it to more accurately and stably regulate the pressure inside the marine environment simulation chamber 10 to the target value. Compared to a solution relying solely on the pressure pump 80 and the booster 40, this combination allows the system to provide a sufficient air source while enabling fine-grained control of the air source pressure, effectively avoiding the problem of pressure instability inside the marine environment simulation chamber 10 caused by air source pressure fluctuations, thereby improving the response speed and regulation accuracy of the entire pressure regulation system.

[0086] In this embodiment, a fifth control valve 907 and a sixth control valve 908 are provided in the pipeline between the pressure regulating mechanism 50 and the air compressor 60 and the booster 40.

[0087] The fifth control valve 907 and the sixth control valve 908 are devices used to regulate the flow rate of fluid (gas). They can be opened, closed, or partially opened as needed to control the amount of gas flowing from the pressure regulating mechanism 50 and the air compressor 60 to the booster 40. The fifth control valve 907 and the sixth control valve 908 can be implemented in various forms. For example, they can be manually operated ball valves or shut-off valves, achieving simple on / off control through manual intervention; they can also be electrically or pneumatically actuated automated valves, such as solenoid valves or pneumatic angle seat valves, which can receive control signals and automatically adjust their opening degree to achieve more precise flow or pressure control; they can also be proportional control valves, which can continuously adjust their opening degree according to the input signal to provide fine flow regulation capabilities. The arrangement of these control valves is designed to provide independent flow control channels for the pressure regulating mechanism 50 and the air compressor 60, ensuring that each pressure source can supply gas to the booster 40 on demand and stably.

[0088] This embodiment further proposes that a pressure sensor 902 be provided on the pressure regulating mechanism 50 and the air compressor 60. The pressure sensor 902 is a device that converts a pressure signal into an electrical signal, and its function is to monitor and quantify the applied pressure in real time. For example, the pressure sensor 902 can be a piezoresistive sensor, which reflects the pressure magnitude by measuring the change in resistance of the pressurized material; or it can be a capacitive sensor, which outputs a pressure signal by detecting the change in capacitance caused by pressure. Alternatively, it can be a strain gauge sensor, which measures pressure by the deformation of the strain gauge under pressure. These different types of pressure sensors 902 can all provide accurate pressure data, providing a basis for subsequent pressure control.

[0089] This embodiment utilizes pressure sensors 902 on the pressure regulating mechanism 50 and the air compressor 60, enabling the system to acquire real-time output pressure data from these two key pressure sources. The pressure regulating mechanism 50 and the air compressor 60 operate in parallel, jointly providing the necessary pressurized gas to the booster 40. The pressure sensor 902 continuously monitors the pressure values ​​output from the pressure regulating mechanism 50 and the air compressor 60, feeding this data back to the system's control unit. Based on preset pressure target values ​​and the real-time data from the pressure sensor 902, the control unit precisely adjusts the operating states of the pressure regulating mechanism 50 and the air compressor 60, for example, by controlling valve openings or motor speeds, to ensure that the pressure supplied to the booster 40 remains stable and accurate. This closed-loop control mechanism effectively compensates for the shortcomings of relying solely on experience or indirect methods for pressure regulation, ensuring precise pressure control within the marine environment simulation chamber 10, thereby providing a stable simulated environment for detecting the hydrogen content inside the dynamic cable core.

[0090] In addition, a fourth control valve 906 is provided between the pressure regulating mechanism 50 and the air compressor 60 and the pressure sensor 902.

[0091] This embodiment further proposes to introduce a pre-concentrated salt water 103 into the marine environment simulation chamber 10.

[0092] The "preset concentration brine 103" refers to an aqueous solution with a specific salinity (i.e., salt content). In the hydrogen content detection system inside the dynamic cable core, the primary function of introducing the preset concentration brine 103 is to simulate a marine environment, providing a corrosive medium for the dynamic cable 100 to induce or accelerate electrochemical reactions in its metal components (such as armored steel wires), thereby generating hydrogen. This simulated environment is crucial for assessing the risk of hydrogen generation from the dynamic cable 100 under actual marine conditions. The preset concentration brine 103 can be prepared by dissolving industrial-grade sodium chloride in deionized water. By accurately weighing the mass of sodium chloride and dissolving it in a known volume of deionized water, a specific molar concentration or mass percentage concentration of brine can be obtained. For example, a 3.5% (mass percentage) sodium chloride solution can be prepared to simulate the salinity of typical seawater. Alternatively, the preset concentration brine 103 can also be prepared using artificial seawater salt packs or premixed artificial seawater solutions. These products typically contain multiple salts, such as sodium chloride, magnesium chloride, magnesium sulfate, calcium chloride, and potassium chloride, to more comprehensively simulate the ionic composition of natural seawater. By dissolving the salt packet in deionized water according to the product instructions, a preset concentration of saline solution that more closely resembles the composition of natural seawater can be obtained.

[0093] This embodiment further proposes a detection system for the hydrogen content inside the dynamic cable core, wherein the marine environment simulation chamber 10 is equipped with a temperature sensor 901.

[0094] Temperature sensor 901 is a device used to measure temperature and convert the temperature value into a readable signal. In this embodiment, the main function of temperature sensor 901 is to monitor the temperature changes inside the marine environment simulation chamber 10 in real time, providing key environmental parameters for hydrogen content detection. Temperature sensor 901 can be in the form of a resistance temperature detector (RTD) (such as Pt100, Pt1000) or a thermistor (such as NTC, PTC). These sensors have high measurement accuracy and stability, and can convert temperature changes into changes in resistance values, which are then converted into electrical signal outputs through corresponding circuits. Another implementation method is to use a thermocouple sensor. A thermocouple is a circuit formed by connecting two different metal conductors. When the temperatures of the two junctions are different, a thermoelectric potential is generated in the circuit, thereby measuring the temperature. Thermocouples have the characteristics of wide measurement range and fast response speed, and are suitable for monitoring changes over a large temperature range. Temperature sensor 901 can be placed inside the marine environment simulation chamber 10, for example, fixed to the chamber wall, suspended in the liquid inside the chamber, or integrated into other internal structures to ensure that it can accurately reflect the temperature of the chamber environment.

[0095] The detection system in this embodiment simulates a marine environment using a marine environment simulation chamber 10. A dynamic cable 100 passes through a cover plate 101 into the chamber and extends to a hydrogen detection container 20. A sealing cover and a first hydrogen content detector are used to ensure the airtightness of the marine environment simulation chamber 10. A second hydrogen content detector 30 is used to detect the hydrogen content inside the hydrogen detection container 20. In addition, a temperature sensor 901 is installed inside the marine environment simulation chamber 10. This temperature sensor 901 can acquire the temperature data inside the marine environment simulation chamber 10 in real time and accurately. The generation, diffusion, and dissolution processes of hydrogen are all closely related to temperature. For example, increased temperature usually accelerates the rate of chemical reactions, which may affect the amount of hydrogen generated; at the same time, temperature also affects the solubility of hydrogen in water and the diffusion rate in the cable material. By introducing the temperature sensor 901, the detection system can monitor and record the temperature changes inside the marine environment simulation chamber 10 during the experiment. These temperature data, combined with the hydrogen content data measured by the first and second hydrogen content detectors 30, make the experimental results more comprehensive and reliable. For example, when an abnormal hydrogen content is observed, temperature data can be used to analyze whether it is caused by temperature fluctuations, thereby eliminating or confirming the influence of temperature on the experimental results. This real-time monitoring of temperature parameters makes it possible to more accurately assess the hydrogen generation and diffusion characteristics of the dynamic cable 100 under different temperature conditions, improving the accuracy and reliability of the detection results.

[0096] This embodiment further proposes a detection method, the steps of which include:

[0097] S1. Place the pre-treated dynamic cable 100 into the marine environment simulation chamber 10; wherein, the end of the dynamic cable 100 with the core water-blocking measure passes through the marine environment simulation chamber 10, and the multiple cores 1001 of the dynamic cable 100 extend out after passing through the cover plate 101; specifically, the dynamic cable 100 should have undergone fatigue testing or a portion of the zinc layer of the armored steel wire has been removed.

[0098] S2. The marine environment simulation chamber 10 is equipped with a sealing cover, which is connected to a first hydrogen content detector. The first hydrogen content detector is used to determine whether the marine environment simulation chamber 10 is leaking. If so, the marine environment simulation chamber 10 is resealed. If not, step S3 is executed. Specifically, first, the various layers of the cover plate 101 are installed (described from the marine environment simulation chamber 10 outwards):

[0099] 1. O-ring: Made of 304 or 316L stainless steel, with a design pressure redundancy of 40MPa. To enhance pressure resistance, a hollow O-ring can be designed and filled with helium at 10MPa pressure, with a coating of approximately 0.5mm thick applied to the surface to slightly fill any gaps.

[0100] 2. Conical self-tightening flange: Made of 316L or duplex stainless steel, with a conical angle of about 15°-30° and the conical surface polished to Ra≤0.8μm to convert water pressure into radial sealing compression force (self-tightening design). The flange is equipped with 12 M24 bolts (preload force of 150kN, with torque limiting washers to prevent overload).

[0101] 3. Polyurethane sealing ring: The sealing ring is made entirely of 95D rigid polyurethane material, and the inner surface of the hole is made of 85A flexible polyurethane in a polygonal shape to accommodate the irregularity of the cable surface. A layer of waterproof silicone grease (such as Krytox® GPL 207, viscosity 5000cSt) can be applied in front of the sealing ring to fill the gap between the flange, the sealing ring, and the cable.

[0102] 4. O-ring and Dynamic Compensation Wedge: An O-ring and a PTFE array wedge are installed after the O-ring. The O-ring has the same structure as the self-tightening conical flange to prevent excessive deformation under high pressure. The PTFE array wedge is a four-piece segmented design with spring-loaded pins to radially compress the cable to accommodate uneven cable surfaces. Wave spring washers are also added to provide axial buffering and compensate for thermal expansion and contraction of the cable. The wedge surface is coated with molybdenum disulfide to reduce friction with the cable sheath.

[0103] The polyurethane sealing ring should be frozen and then installed in the groove. After returning to room temperature, it will naturally expand and fit the surface of the dynamic cable. The cover plate fixing bolts should be tightened in three stages, with torques of 30%, 60%, and 100%, respectively. The final torque value should be greater than 1000 N·m.

[0104] S3. Fill the marine environment simulation chamber 10 with a preset concentration of brine 103, measure and record the salinity of brine 103 using a salinity meter, and simultaneously pressurize the marine environment simulation chamber 10 to the depth of the dynamic cable application; turn on the first hydrogen content detector and the second hydrogen content detector 30, record the initial hydrogen content value and reset it to zero, and then continuously monitor the hydrogen value and water pressure value for at least 3 days.

[0105] S4. After the experiment, record the values ​​of the first hydrogen content detector and the second hydrogen content detector 30. The value of the first hydrogen content detector should be close to or 0, indicating that there is basically no hydrogen influence at the core 1001 and there is no safety risk when the dynamic cable 100 is running normally. The value of the second hydrogen content detector 30 should be greater than the initial value, indicating the amount of hydrogen generated after the brine 103 reacts with the armored steel wire of the dynamic cable 100.

[0106] Step S1 aims to correctly install the dynamic cable 100 sample to be tested into the simulated environment, providing a basis for subsequent hydrogen evolution experiments. Pretreatment may include cleaning the dynamic cable 100, cutting it to a suitable length, or performing necessary end treatments to ensure its airtightness with the simulated chamber. The end of the dynamic cable 100 with a core water-blocking measure passes through the marine environment simulated chamber 10, ensuring that only the core 1001 to be tested is exposed to the testing environment, while other parts are blocked. The core 1001 extends after passing through the cover plate 101, allowing the hydrogen detection container 20 to directly detect the hydrogen around the core 1001.

[0107] The purpose of step S2 is to rigorously check the airtightness of the marine environment simulation chamber 10 before the formal experiment begins, in order to eliminate interference from the external environment on the hydrogen detection results. The sealing cover can be a flexible or rigid shell that completely covers the exterior of the marine environment simulation chamber 10, forming a relatively sealed space. A first hydrogen content detector is used to detect whether there is hydrogen leakage inside the sealing cover. If there is hydrogen leakage, it indicates that the sealing of the marine environment simulation chamber 10 is unqualified and needs to be resealed. For example, checking the sealing ring between the cover plate 101 and the dynamic cable 100, or the welding points of the simulation chamber body, etc. Through this step, it can be ensured that the hydrogen detected in subsequent experiments does indeed originate from inside the dynamic cable 100 or its reaction with the brine 103, rather than hydrogen seepage from the external environment.

[0108] Step S3 aims to simulate the operating conditions of the dynamic cable 100 in a real marine environment and initiate the hydrogen detection process. Adding a pre-concentrated saline solution 103 simulates a seawater environment, as ions in the saline solution may undergo an electrochemical reaction with the metal components of the dynamic cable 100 to produce hydrogen. A salinity meter is used to ensure the concentration of the saline solution 103 meets experimental requirements and records the concentration to ensure experimental repeatability. Pressurizing the marine environment simulation chamber 10 to the depth at which the dynamic cable is applied simulates the pressure conditions of a deep-sea environment, as high pressure may affect the solubility and diffusion rate of hydrogen. Turning on, recording initial values, and zeroing the first and second hydrogen content detectors 30 establishes an accurate detection baseline. Continuously monitoring hydrogen and water pressure values ​​for at least 3 days observes the dynamic process of hydrogen evolution and ensures the experimental time is sufficient to capture the trend and amount of hydrogen evolution.

[0109] Step S4 involves analyzing and evaluating the experimental results. Recording the final values ​​from the first and second hydrogen content detectors 30 is fundamental to obtaining the experimental data. A value close to or zero from the first hydrogen content detector is a key indicator verifying the good sealing of the entire experimental system, ensuring the validity of the experimental results. A value greater than the initial value from the second hydrogen content detector 30 directly reflects the amount of hydrogen produced by the dynamic cable 100 in a simulated marine environment, thus allowing for the assessment of the hydrogen release risk from the dynamic cable 100. By comprehensively judging these two values, a conclusion can be drawn regarding whether the dynamic cable 100 poses a hydrogen safety risk in practical applications.

[0110] The detection method in this embodiment achieves accurate assessment of the hydrogen content inside the core of a dynamic cable through a series of orderly steps and a specially designed detection system. First, in step S1, the pre-treated dynamic cable 100 is precisely installed into the marine environment simulation chamber 10, ensuring that its core 1001 extends through the cover plate 101. This provides a controlled experimental object and environment for subsequent hydrogen detection. The end of the dynamic cable 100 with water-blocking measures through the core passes through the marine environment simulation chamber 10, exposing only the target detection area and avoiding interference from non-target areas. Subsequently, in step S2, a sealing cover is installed outside the marine environment simulation chamber 10 and connected to a first hydrogen content detector, rigorously testing the airtightness of the entire simulation chamber before the formal experiment. This pre-testing step is crucial, effectively eliminating interference from external hydrogen on the experimental results and ensuring that the subsequently detected hydrogen truly originates from the dynamic cable 100 itself or its reaction with the simulated environment. If a leak is detected, it is promptly sealed, ensuring the accuracy and reliability of the experiment. Next, in step S3, a pre-concentrated brine 103 is added to the marine environment simulation chamber 10, and the water pressure is precisely adjusted to the actual application depth of the dynamic cable 100, thus highly simulating the real working conditions of the dynamic cable 100 in a marine environment. The introduction of brine 103 simulates the corrosive environment of seawater, while the application of water pressure simulates the effect of deep-sea pressure on hydrogen evolution and diffusion. Under these conditions, the first hydrogen content detector and the second hydrogen content detector 30 are simultaneously turned on, and the initial values ​​are recorded and then zeroed, setting a benchmark for the dynamic monitoring of hydrogen content. Monitoring for at least 3 days ensures that the process and accumulation of hydrogen evolution can be fully observed. Finally, in step S4, the detector values ​​after the experiment are recorded and analyzed. The value of the first hydrogen content detector is close to or zero, which again verifies the good sealing of the experimental process and eliminates the possibility of external hydrogen interference. If the value of the second hydrogen content detector 30 is significantly greater than the initial value, it directly quantifies the amount of hydrogen generated by the dynamic cable 100 in the simulated marine environment. Through this systematic approach, this embodiment can accurately assess the risk of hydrogen evolution in the dynamic cable 100, providing a scientific basis for the safe operation of the dynamic cable 100. The entire method works closely with the detection system; the system provides the simulated environment and detection methods, while the method standardizes the operating procedures and data analysis, jointly ensuring the accuracy and reliability of the detection results.

[0111] Combination Figure 4 and Figure 5 As shown, a specific example will be used to illustrate this below.

[0112] Hydrogen content testing was conducted on a dynamic cable 100 supplied for the Phase 1 of the Lower Zakum Long-Term Development Plan in Abu Dhabi – New Main Gas Pipeline Project.

[0113] The experimental procedure is as follows:

[0114] I. Experimental Equipment

[0115] 1. Marine environment simulation chamber 10, prepared with seawater with a salinity of 3.5%;

[0116] 2. A 1-meter-long sample dynamic cable (without overflow holes in the inner and outer sheaths), with the armored section being at least 0.5 meters long;

[0117] 3. Prepare a water-blocking cap 1002 to perform water-blocking sealing measures on the inner sheath section of the armored part of the sample dynamic cable 100.

[0118] 4. Prepare a gas content monitor.

[0119] II. Experimental Procedure

[0120] 1. Peel off the outer high-density polyethylene sheath from one end of the sample dynamic cable 100 and place it into the marine environment simulation chamber 10, then seal it. A transparent sealing cover is placed over the marine environment simulation chamber 10 and connected to a highly sensitive first hydrogen content detector. The first hydrogen content detector is activated to monitor the hydrogen concentration inside the sealing cover. If an increase in hydrogen concentration is detected, it indicates a leak in the marine environment simulation chamber 10. In this case, it is necessary to check whether the sealing ring between the cover plate 101 and the dynamic cable 100 is intact, or to check the welds of the simulation chamber body, and perform necessary repairs and resealing until the first hydrogen content detector shows no hydrogen leakage.

[0121] 2. Fill the marine environment simulation chamber 10 with salt water with a salinity of 3.5% to simulate seawater, pressurize the water to 5 bar, and continue for 48 hours;

[0122] 3. The other end of the sample dynamic cable is sealed with a sealing cap equipped with an air valve. The air valve is then opened and connected to the second hydrogen content detector 30. The core 1001 should be exposed inside the end cap 1002 with an appropriate gap. At this point, the first hydrogen content detector and the second hydrogen content detector 30 connected to the hydrogen detection container 20 are turned on, their initial readings are recorded, and then zeroed. Subsequently, the hydrogen values ​​of both detectors and the water pressure in the marine environment simulation chamber 10 are continuously monitored, with data recorded every 12 hours. The entire monitoring process lasts for 168 hours.

[0123] 4. After continuous monitoring for 168 hours, the final reading of the first hydrogen content detector was recorded as 0.001 ppm, and the final reading of the second hydrogen content detector 30 was 0.5 ppm. Based on the reading of the first hydrogen content detector being close to 0, it can be determined that the tightness of the entire experimental process is good and there is no external hydrogen interference. The reading of 0.5 ppm of the second hydrogen content detector 30 is significantly higher than the initial value of 0 ppm, indicating that in the simulated marine environment, an electrochemical reaction occurred after the armored wire of the dynamic cable 100 came into contact with the brine 103, generating 0.5 ppm of hydrogen.

[0124] III. Experimental Results

[0125] During the continuous experiment, if the gas content monitor does not detect hydrogen leaking from the cable core, the experiment is determined to be qualified and the dynamic cable meets the design standards.

[0126] Through the above technical solution, the detection method of this embodiment effectively solves the problem of how to ensure the accuracy and reliability of the detection results in the detection of the hydrogen content inside the core of the dynamic cable through standardized experimental steps. By strictly detecting the tightness of the marine environment simulation chamber before the experiment, it can effectively exclude the interference of the external environment on hydrogen detection and ensure the authenticity of the experimental data. At the same time, by accurately simulating the water pressure and brine conditions of the dynamic cable in the actual marine environment, the experimental results can more realistically reflect the hydrogen evolution behavior of the dynamic cable in actual applications. Continuous monitoring of hydrogen and water pressure, combined with data analysis after the experiment, can clearly determine whether there is a risk of hydrogen evolution in the dynamic cable, providing a scientific and reliable evaluation basis for the safe operation of the dynamic cable and avoiding potential safety hazards caused by hydrogen evolution.

[0127] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A system for detecting the hydrogen content inside a dynamic cable core, characterized in that, include: The marine environment simulation chamber (10) has cover plates (101) on both sides; and the cover plates (101) have through holes for the dynamic cable (100) to pass through. A sealed cover is installed outside the marine environment simulation chamber (10) and is connected to a first hydrogen content detector; A hydrogen detection container (20) is provided with a cover plate on one side near the marine environment simulation chamber (10); the dynamic cable (100) passes through the cover plate (101) and extends into the hydrogen detection container (20). The second hydrogen content detector (30) is connected to the hydrogen detection container (20).

2. The detection system for hydrogen content inside the dynamic cable core according to claim 1, characterized in that, It also includes a pressure regulating module connected to the marine environment simulation chamber (10); the pressure regulating module is configured to regulate the pressure inside the marine environment simulation chamber (10).

3. The detection system for hydrogen content inside the dynamic cable core according to claim 2, characterized in that, The pressure regulating module includes a booster (40) connected to the marine environment simulation chamber (10) via a pipeline and a pressure pump (80) connected to the booster (40) via a pipeline; the pipeline between the booster (40) and the marine environment simulation chamber (10) is provided with at least one control valve, and the pipeline between the booster (40) and the pressure pump (80) is provided with a control valve.

4. The detection system for hydrogen content inside the dynamic cable core according to claim 3, characterized in that, The pipeline between the booster (40) and the pressure pump (80) is also equipped with a pressure gauge (70).

5. The detection system for hydrogen content inside the dynamic cable core according to claim 3, characterized in that, The pressure regulating module also includes a pressure regulating mechanism (50) and an air compressor (60) connected to the booster (40) via a pipeline; the pressure regulating mechanism (50) and the air compressor (60) are connected in parallel.

6. The detection system for hydrogen content inside the dynamic cable core according to claim 5, characterized in that, The pipeline between the pressure regulating mechanism (50) and the air compressor (60) and the booster (40) is provided with a fifth control valve (907) and a sixth control valve (908).

7. The detection system for hydrogen content inside the dynamic cable core according to claim 5, characterized in that, The pressure regulating mechanism (50) and the air compressor (60) are also equipped with a pressure sensor (902).

8. The detection system for hydrogen content inside the dynamic cable core according to claim 1, characterized in that, The marine environment simulation chamber (10) is filled with salt water (103) of a preset concentration.

9. The detection system for hydrogen content inside the dynamic cable core according to claim 1, characterized in that, The marine environment simulation chamber (10) is equipped with a temperature sensor (901).

10. A detection method, characterized in that, The detection system for hydrogen content inside a dynamic cable core as described in any one of claims 1-9 includes the following steps: S1. Place the pre-treated dynamic cable (100) into the marine environment simulation chamber (10); wherein, the end of the dynamic cable (100) with the core water blocking measure passes through the marine environment simulation chamber (10), and the multiple cores (1001) of the dynamic cable (100) extend out after passing through the cover plate (101); S2. The marine environment simulation chamber (10) is covered with a sealing cover. The sealing cover is connected to a first hydrogen content detector. The first hydrogen content detector is used to determine whether the marine environment simulation chamber (10) is leaking. If so, the marine environment simulation chamber (10) is resealed. If not, step S3 is executed. S3. Fill the marine environment simulation chamber (10) with a preset concentration of salt water (103), measure and record the salt content of the salt water (103) using a salinity meter, and at the same time, pressurize the marine environment simulation chamber (10) to the depth of the dynamic cable application; turn on the first hydrogen content detector and the second hydrogen content detector (30), record the initial hydrogen content value and clear it to zero, and then continuously monitor the hydrogen value and water pressure value for at least 3 days. S4. After the experiment, record the values ​​of the first hydrogen content detector and the second hydrogen content detector (30). The value of the first hydrogen content detector should be close to or 0, indicating that there is basically no hydrogen influence at the core (1001) and there is no safety risk when the dynamic cable (100) is running normally. The value of the second hydrogen content detector (30) should be greater than the initial value, indicating the amount of hydrogen generated after the salt water (103) reacts with the armored steel wire of the dynamic cable (100).

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