Socket and spigot type flexible hydrogen conveying hose connector and leakage detection method thereof

Abstract

The invention relates to a socket type flexible hydrogen conveying hose connector and a leakage detection method thereof, the socket type flexible hydrogen conveying hose connector is used for fixing and sealing two sections of flexible hydrogen conveying hoses after socket type connection, and the socket type flexible hydrogen conveying hose connector comprises an upper female head outer sheath, a lower female head outer sheath, a wedge-shaped piece, a sealing system, a leakage monitoring unit, a reinforcing buckle and a resistance monitoring system; corresponding wedge-shaped pieces, sealing systems and leakage monitoring units are arranged in the upper female head outer sheath and the lower female head outer sheath; the narrow end of each wedge-shaped piece is tightly connected with the corresponding female head outer sheath, and the wide end of each wedge-shaped piece is tightly connected with the corresponding sealing system. Corresponding reinforcing buckles are arranged on the outer side of the upper female head outer sheath and the outer side of the lower female head outer sheath, and the reinforcing buckles are used for fastening the overall structure of the connector and fixing the flexible hydrogen conveying hose connected in a socket and spigot mode; the resistance monitoring system is electrically connected with each leakage monitoring unit and used for judging whether hydrogen leakage occurs in the flexible hydrogen conveying hose or not, and the hydrogen leakage monitoring system can be widely applied to the technical field of new energy development.

Description

Technical Field

[0001] The invention relates to the technical field of new energy development, and in particular to a socket-and-spigot type flexible hydrogen transport hose joint and a leakage detection method thereof. Background Art

[0002] With the growth of global demand for clean energy, especially in cutting-edge fields such as offshore wind power hydrogen production, hydrogen energy has received high attention due to its environmental advantages, and pipeline hydrogen transportation has gradually become a key research direction due to its advantages in long-distance and low-cost transportation.

[0003] At present, high-pressure gaseous or liquid hydrogen pipeline transportation has a certain application scale, but traditional steel pipelines face many limitations due to high construction costs and hydrogen embrittlement. In contrast, thermoplastic reinforced flexible pipe (RTP) is regarded as an ideal hydrogen transport medium due to its excellent flexibility and corrosion resistance. The RTP structure usually consists of an inner lining layer, a reinforcement layer and an outer protective layer, but when directly applied to hydrogen transportation, there are certain gas permeability problems, and it is often necessary to add a barrier layer to the structure to enhance air tightness. Therefore, the hydrogen permeability of the hose is particularly important, and special attention should be paid to the air tightness of leak-prone parts such as joints and valves. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide a socket-type flexible hydrogen hose joint and a leakage detection method thereof, which can avoid hydrogen leakage, thereby ensuring the safety and long-term reliability of the pipeline system.

[0005] To achieve the above object, the present invention adopts the following technical solutions: On the one hand, a socket-type flexible hydrogen hose connector is provided, which is used for fixing and sealing two sections of flexible hydrogen hoses after being socket-type connected, and includes an upper female outer sheath, a lower female outer sheath, a wedge, a sealing system, a reinforcement buckle, a leakage monitoring unit and a resistance monitoring system;

[0006] The upper female outer sheath and the lower female outer sheath are both provided with corresponding wedge-shaped pieces, sealing systems and leakage monitoring units; the narrow end of each wedge-shaped piece is tightly connected to the corresponding female outer sheath, and the wide end of each wedge-shaped piece is tightly connected to the corresponding sealing system. The wedge-shaped piece is used to reinforce the joint in the axial direction, and the sealing system is used to limit the hydrogen leakage of the flexible hydrogen hose on both sides of the joint during the socket connection process. The leakage monitoring unit is used to monitor the resistance change of the outer protective layer of the flexible hydrogen hose;

[0007] The outer sides of the upper female connector outer sheath and the lower female connector outer sheath are both provided with corresponding reinforcement buckles, and the reinforcement buckles are used to fasten the overall structure of the joint and fix the flexible hydrogen transport hose after the socket-type connection;

[0008] The resistance monitoring system is electrically connected to each of the leakage monitoring units, and is used to obtain the resistance change monitored by each of the leakage monitoring units in real time, and to determine whether hydrogen leakage occurs in the flexible hydrogen transport hose.

[0009] Furthermore, the outer sides of the upper female connector outer sheath and the lower female connector outer sheath are both provided with outer sealing rings for performing secondary sealing on the joint.

[0010] Furthermore, the upper female connector outer sheath and the lower female connector outer sheath both adopt a quasi-cylindrical structure.

[0011] Further, each of the sealing systems comprises a first sealing rubber ring, a labyrinth sealing belt and a second sealing rubber ring;

[0012] One side of each of the first sealing rubber rings is tightly connected to the corresponding wedge-shaped piece, the other side of each of the first sealing rubber rings is tightly connected to the corresponding side of the second sealing rubber ring through the corresponding labyrinth sealing belt, and the other side of each of the second sealing rubber rings is tightly connected to the vertical arm of the corresponding female outer sheath.

[0013] Furthermore, the upper female connector outer sheath, the lower female connector outer sheath, the first sealing rubber ring, the labyrinth sealing tape, the second sealing rubber ring and the leakage monitoring unit are all made of non-metallic thermoplastic resin.

[0014] Furthermore, each of the leakage monitoring units is arranged on the other side of the female outer sheath away from the corresponding wedge-shaped piece, and is supplemented by the matrix material. Electrical contacts are provided in the upper female outer sheath and the lower female outer sheath, and each of the leakage monitoring units is connected to the resistance monitoring system through the corresponding electrical contacts.

[0015] Furthermore, the leakage monitoring unit adopts a lithium aluminum deuteride element.

[0016] Furthermore, the reinforcement buckle includes an upper reinforcement buckle, a bolt and a lower reinforcement buckle; the upper reinforcement buckle is connected to the lower reinforcement buckle through the bolt, so that the upper female outer sheath and the lower female outer sheath fix the two sections of flexible hydrogen transport hose.

[0017] On the other hand, a method for detecting leakage of a socket-type flexible hydrogen transport hose joint is provided, comprising:

[0018] Connect two sections of flexible hydrogen transport hoses by socket-type connection;

[0019] The connection between the two sections of the flexible hydrogen transport hose is fixed and sealed by the joint;

[0020] Each leakage monitoring unit monitors the resistance change of the outer protective layer of the flexible hydrogen hose in real time and sends it to the resistance monitoring system;

[0021] The resistance monitoring system determines whether hydrogen leakage occurs in the flexible hydrogen hose based on the resistance change of the outer protective layer of the flexible hydrogen hose, and issues an early warning when leakage occurs in the flexible hydrogen hose.

[0022] Furthermore, each leakage monitoring unit monitors the resistance change of the outer protective layer of the flexible hydrogen hose in real time and sends it to the resistance monitoring system, including:

[0023] During the service of the connector, the leaked hydrogen directly contacts the leakage monitoring unit in the outer sheath of the female connector. At this time, part of the hydrogen is absorbed by the leakage monitoring unit, causing its resistance to change.

[0024] As the amount of hydrogen adsorbed by the leakage monitoring unit gradually increases, the resistance of the element gradually increases and is sent to the resistance monitoring system through the leakage monitoring unit and the electrical contacts.

[0025] The present invention adopts the above technical solution, which has the following advantages:

[0026] 1. The customized socket-type flexible hydrogen hose of the present invention can effectively improve the sealing performance of the joint in a high-pressure hydrogen environment, avoid hydrogen leakage, and thus ensure the safety and long-term reliability of the pipeline system.

[0027] 2. The connection method of the present invention is easy to install, easy to disassemble, and has strong adaptability. It does not require professional welding or complex equipment, and the overall cost is relatively low, which makes the present invention an economical and practical connection solution in this field.

[0028] 3. The present invention adds a reinforced snap-on connection on the basis of the socket-type connection, and the reinforced snap-on is made of metal aluminum, which improves the axial and radial stability of the joint while increasing the sealing of the joint.

[0029] 4. Due to the danger of hydrogen, while preventing its leakage, the strength requirements of the hose joint must also be guaranteed. In order to make the joint structure more stable, the present invention is provided with a reinforced buckle to fasten the overall structure of the joint.

[0030] 5. The present invention can realize real-time monitoring of hydrogen leakage by arranging a leakage monitoring unit in the outer sheath of the female head.

[0031] 6. The present invention can issue a timely warning at the early stage of hydrogen leakage, thereby effectively preventing potential safety hazards.

[0032] 7. The present invention can significantly reduce the probability of hydrogen leakage accidents and reduce the maintenance and replacement costs of the pipeline system by early detection and taking preventive measures.

[0033] In summary, the present invention can be widely applied in the field of new energy development technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0035] Figure 1 It is a structural schematic diagram of a socket-and-spigot type flexible hydrogen transport hose joint provided by an embodiment of the present invention;

[0036] Figure 2 It is a cross-sectional schematic diagram of a socket-type flexible hydrogen transport hose joint provided by one embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of the three-dimensional structure of a socket-type flexible hydrogen transport hose connector provided by one embodiment of the present invention;

[0038] Figure 4 It is a schematic diagram of a resistance change case of a lithium aluminum deuterium element attached to the outer sheath layer of a female head provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0041] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0042] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0043] At present, the hydrogen permeability problem of hoses is particularly important, and special attention should be paid to the airtightness problem in leak-prone parts such as joints and valves. In view of the leak-prone part of the pipeline joint, an embodiment of the present invention proposes a socket-type flexible hydrogen hose joint, which is used for fixing and sealing two sections of flexible hydrogen hoses after socket-type connection, including an upper female outer sheath, a lower female outer sheath, a wedge, a sealing system, a leakage monitoring unit and a resistance monitoring system; corresponding wedges, sealing systems and leakage monitoring units are arranged in the upper female outer sheath and the lower female outer sheath; the narrow end of each wedge is tightly connected to the corresponding female outer sheath, and the wide end of each wedge is tightly connected to the corresponding sealing system, and the wedge is used to seal the joint in the axial direction. It plays a reinforcing role. The sealing system is used to limit the hydrogen leakage of the flexible hydrogen hose on both sides of the joint during the socket connection process. The leakage monitoring unit is used to monitor the resistance change of the outer protective layer of the flexible hydrogen hose; the outer sides of the upper female head outer sheath and the lower female head outer sheath are provided with corresponding reinforcement buckles, which are used to tighten the overall structure of the joint and fix the flexible hydrogen hose after the socket connection; the resistance monitoring system is electrically connected to each leakage monitoring unit respectively, and the resistance monitoring system is used to obtain the resistance change monitored by each leakage monitoring unit in real time, and judge whether the flexible hydrogen hose has hydrogen leakage. The joint of the flexible hydrogen hose for socket connection proposed in the present invention can effectively improve the sealing performance of the joint in a high-pressure hydrogen environment, avoid hydrogen leakage, and thus ensure the safety and long-term reliability of the pipeline system. By strengthening the sealing structure and the anti-permeation method, the present invention can significantly improve the overall air tightness of the flexible hydrogen hose, reflecting the important technical innovation and application value in the long-distance transportation of hydrogen energy.

[0044] Example 1

[0045] like Figure 1 As shown, this embodiment provides a socket-type flexible hydrogen hose joint, which is used for fixing and sealing two sections of flexible hydrogen hoses after socket-type connection, including an upper female outer sheath 1, a lower female outer sheath 2, a wedge 3, a sealing system 4, a leakage monitoring unit 5, an outer sealing ring 6, a reinforcement buckle 7 and a resistance monitoring system 8.

[0046] The upper female outer sheath 1 and the lower female outer sheath 2 are respectively provided with corresponding wedges 3, sealing systems 4 and leakage monitoring units 5. The narrow end of each wedge 3 is tightly connected to the corresponding female outer sheath, and the wide end of each wedge 3 is tightly connected to the corresponding sealing system 4. The wedge 3 is used to reinforce the joint in the axial direction. The sealing system 4 is used to greatly limit the hydrogen leakage of the flexible hydrogen hose on both sides of the joint during the socket connection process. The leakage monitoring unit 5 is used to monitor the resistance change of the outer protective layer of the flexible hydrogen hose.

[0047] The outer side of the upper female outer sheath 1 and the lower female outer sheath 2 are both provided with an outer sealing ring 6, which is used to provide secondary sealing for the joint. The outer side of the upper female outer sheath 1 and the lower female outer sheath 2 are both provided with corresponding reinforcement buckles 7, which are used to tighten the overall structure of the joint and fix the flexible hydrogen transport hose after the socket connection.

[0048] The resistance monitoring system 8 is electrically connected to each leakage monitoring unit 5, and is used to obtain the resistance change monitored by each leakage monitoring unit 5 in real time, and determine whether hydrogen leakage occurs in the flexible hydrogen transmission hose, thereby providing timely warning and realizing effective monitoring of hydrogen leakage.

[0049] In a preferred embodiment, the upper female connector outer sheath 1 and the lower female connector outer sheath 2 both adopt a cylindrical structure, and the material is non-metallic thermoplastic resin. The upper female connector outer sheath 1 and the lower female connector outer sheath 2 adopt a streamlined design as a whole, which is more convenient for installation and construction and coordination with other components.

[0050] In a preferred embodiment, each sealing system 4 includes a first sealing rubber ring 41, a labyrinth sealing belt 42, and a second sealing rubber ring 43. One side of each first sealing rubber ring 41 is tightly connected to the corresponding wedge-shaped member 3, and the other side of each first sealing rubber ring 41 is tightly connected to one side of the corresponding second sealing rubber ring 43 through the corresponding labyrinth sealing belt 42, and the other side of each second sealing rubber ring 43 is tightly connected to the vertical arm 9 of the corresponding female outer sheath. The first sealing rubber ring 41, the labyrinth sealing belt 42, and the second sealing rubber ring 43 cooperate with each other and are sealed layer by layer, which greatly limits the hydrogen leakage of the flexible hydrogen transport hose on both sides of the joint during the socket connection process, and provides a certain structural stability in both radial and axial directions.

[0051] Specifically, each first sealing rubber ring 41, the labyrinth sealing belt 42 and the second sealing rubber ring 43 are made of non-metallic thermoplastic resin. Each first sealing rubber ring 41 is a small sealing rubber ring, and each second sealing rubber ring 43 is a large sealing rubber ring.

[0052] In a preferred embodiment, each leakage monitoring unit 5 uses a lithium aluminum deuteride (lithium aluminum deuterium) element, and each leakage monitoring unit 5 is arranged on the other side of the female outer sheath away from the corresponding wedge 3, and is supplemented by the matrix material to maintain the mechanical properties of the entire device stable. Electrical contacts 10 are arranged in the upper female outer sheath 1 and the lower female outer sheath 2, and each leakage monitoring unit 5 is connected to the corresponding connection, and each leakage monitoring unit 5 is connected to the resistance monitoring system 8 through the corresponding electrical contacts 10.

[0053] Specifically, each leakage monitoring unit 5 is made of non-metallic thermoplastic resin.

[0054] In a preferred embodiment, the non-metallic thermoplastic resin includes but is not limited to one of polyvinyl chloride, polyurethane, polyethylene terephthalate, high-density polyethylene and the like.

[0055] In a preferred embodiment, Figure 2 and Figure 3 As shown, the reinforcement buckle 7 includes an upper reinforcement buckle 71, a bolt 72 and a lower reinforcement buckle 73. The upper reinforcement buckle 71 is connected to the lower reinforcement buckle 73 through the bolt 72, so that the upper female outer sheath 1 and the lower female outer sheath 2 fix the two sections of the flexible hydrogen transport hose, and the sealing of this part is ensured by the outer sealing ring 6.

[0056] Specifically, the material of the reinforcing buckle 7 is aluminum metal, and the hydrogen permeability resistance of aluminum metal is utilized to further reduce the leakage of hydrogen.

[0057] Example 2

[0058] This embodiment provides a method for detecting leakage of a socket-type flexible hydrogen transport hose joint, comprising the following steps:

[0059] 1) Connect two sections of flexible hydrogen transport hoses by socket-type connection.

[0060] 2) The connection between the two sections of the flexible hydrogen transport hose is fixed and sealed by the joint of Example 1.

[0061] 3) Each leakage monitoring unit 5 of the joint monitors the resistance change of the outer protective layer of the flexible hydrogen transport hose in real time and sends it to the resistance monitoring system 8.

[0062] Specifically, during the service of the connector, the leaked hydrogen directly contacts the leakage monitoring unit 5 in the outer sheath of the female connector. At this time, part of the hydrogen is absorbed by the leakage monitoring unit 5, causing its resistance to change. As the amount of hydrogen absorbed by the leakage monitoring unit 5 gradually increases, the resistance of the element also gradually increases, and is sent to the resistance monitoring system 8 through the leakage monitoring unit 5 and the electrical contact 10.

[0063] 4) The resistance monitoring system 8 determines whether hydrogen leakage occurs in the flexible hydrogen hose according to the resistance change of the outer protective layer of the flexible hydrogen hose, and issues an early warning when leakage occurs in the flexible hydrogen hose.

[0064] Specifically, Figure 4 As shown, a possible example form of the change of the resistance of the leakage monitoring unit 5 over time is illustrated. In the first time period (1), hydrogen does not leak near the leakage monitoring unit 5, so the resistance of the leakage monitoring unit 5 remains constant in the first time period. At the end of the first time period, hydrogen begins to leak at a certain leakage rate in the second time period (2), and the resistance of the leakage monitoring unit 5 decreases over time, and hydrogen is adsorbed at a first adsorption rate. At the end of the second time period, due to the charging and discharging effect of the flexible hydrogen transport hose, the physical damage of the female head outer sheath outside the leakage monitoring unit 5 is aggravated (for example, interlayer delamination or microcracks occur), resulting in an increase in the hydrogen leakage rate in the third time period (3), so the resistance change rate of the leakage monitoring unit 5 is faster than that in the second time period, and the adsorption rate of the leakage monitoring unit 5 is the second adsorption rate. At the end of the third time period, the resistance value corresponding to point X corresponds to the total amount of gaseous hydrogen leaked from the flexible hydrogen transport hose from t=0 to the end of the third time period.

[0065] The above embodiments are only used to illustrate the present invention, wherein the structure, connection mode and manufacturing process of each component may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A socket-type flexible hydrogen hose joint, characterized in that: Used for fixing and sealing two sections of flexible hydrogen hose after socket connection, including upper female outer sheath, lower female outer sheath, wedge, sealing system, reinforcement buckle, leakage monitoring unit and resistance monitoring system; The upper female outer sheath and the lower female outer sheath are both provided with corresponding wedge-shaped pieces, sealing systems and leakage monitoring units; the narrow end of each wedge-shaped piece is tightly connected to the corresponding female outer sheath, and the wide end of each wedge-shaped piece is tightly connected to the corresponding sealing system. The wedge-shaped piece is used to reinforce the joint in the axial direction, and the sealing system is used to limit the hydrogen leakage of the flexible hydrogen hose on both sides of the joint during the socket connection process. The leakage monitoring unit is used to monitor the resistance change of the outer protective layer of the flexible hydrogen hose; The outer sides of the upper female connector outer sheath and the lower female connector outer sheath are both provided with corresponding reinforcement buckles, and the reinforcement buckles are used to fasten the overall structure of the joint and fix the flexible hydrogen transport hose after the socket-type connection; The resistance monitoring system is electrically connected to each of the leakage monitoring units, and is used to obtain the resistance change monitored by each of the leakage monitoring units in real time, and to determine whether hydrogen leakage occurs in the flexible hydrogen transport hose.

2. A socket-type flexible hydrogen transport hose joint as claimed in claim 1, characterized in that: The outer sides of the upper female head outer sheath and the lower female head outer sheath are both provided with the outer sealing ring for performing secondary sealing on the joint.

3. The socket-type flexible hydrogen transport hose joint according to claim 1, characterized in that: The upper female connector outer sheath and the lower female connector outer sheath both adopt a quasi-cylindrical structure.

4. The socket-type flexible hydrogen transport hose joint according to claim 1, characterized in that: Each of the sealing systems comprises a first sealing rubber ring, a labyrinth sealing belt and a second sealing rubber ring; One side of each of the first sealing rubber rings is tightly connected to the corresponding wedge-shaped piece, the other side of each of the first sealing rubber rings is tightly connected to the corresponding side of the second sealing rubber ring through the corresponding labyrinth sealing belt, and the other side of each of the second sealing rubber rings is tightly connected to the vertical arm of the corresponding female outer sheath.

5. A socket-and-spigot type flexible hydrogen transport hose joint as claimed in claim 4, characterized in that: The materials of the upper female head outer sheath, the lower female head outer sheath, the first sealing rubber ring, the labyrinth sealing belt, the second sealing rubber ring and the leakage monitoring unit are all made of non-metallic thermoplastic resin.

6. The socket-type flexible hydrogen transport hose joint according to claim 1, characterized in that: Each of the leakage monitoring units is arranged on the other side of the female outer sheath away from the corresponding wedge-shaped piece, and is supplemented by the matrix material. Electrical contacts are arranged in the upper female outer sheath and the lower female outer sheath, and each of the leakage monitoring units is connected to the resistance monitoring system through the corresponding electrical contacts.

7. The socket-type flexible hydrogen transport hose joint according to claim 1, characterized in that: The leakage monitoring unit adopts a lithium aluminum deuteride element.

8. The socket-type flexible hydrogen transport hose joint according to claim 1, characterized in that: The reinforcement buckle includes an upper reinforcement buckle, a bolt and a lower reinforcement buckle; the upper reinforcement buckle is connected to the lower reinforcement buckle through the bolt, so that the upper female head outer sheath and the lower female head outer sheath fix the two sections of flexible hydrogen transport hose.

9. A method for detecting leakage of a socket-type flexible hydrogen hose joint, characterized in that: include: Connect two sections of flexible hydrogen transport hoses by socket-type connection; Fixing and sealing the connection between two sections of flexible hydrogen transport hose by means of the joint as claimed in any one of claims 1 to 8; Each leakage monitoring unit monitors the resistance change of the outer protective layer of the flexible hydrogen hose in real time and sends it to the resistance monitoring system; The resistance monitoring system determines whether hydrogen leakage occurs in the flexible hydrogen hose based on the resistance change of the outer protective layer of the flexible hydrogen hose, and issues an early warning when leakage occurs in the flexible hydrogen hose.

10. A leak detection method for a socket-type flexible hydrogen transport hose joint according to claim 9, characterized in that: Each leakage monitoring unit monitors the resistance change of the outer protective layer of the flexible hydrogen hose in real time and sends it to the resistance monitoring system, including: During the service of the connector, the leaked hydrogen directly contacts the leakage monitoring unit in the outer sheath of the female connector. At this time, part of the hydrogen is absorbed by the leakage monitoring unit, causing its resistance to change. As the amount of hydrogen adsorbed by the leakage monitoring unit gradually increases, the resistance of the element gradually increases and is sent to the resistance monitoring system through the leakage monitoring unit and the electrical contacts.

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