A non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers

Abstract

This invention discloses a non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers, belonging to the field of hydrogen transport hose technology. It includes an outer tube, with a connecting tube at its bottom end, and a composite hose at its bottom end. A first sleeve is connected through the bottom of the connecting tube, and a second sleeve is connected through its top end. The first sleeve is fitted onto the outer wall of the composite hose, and the second sleeve is fitted onto the outer wall of the outer tube. A cavity is provided inside the connecting tube, and a sealing assembly is slidably connected within the cavity. The composite hose, connecting tube, and outer tube together form a complete hydrogen transport structure. The connecting tube is fixed to the composite hose and outer tube via the first and second sleeves, respectively. The internal cavity provides installation and sliding space for the sealing assembly. Furthermore, the composite hose employs a multi-layered composite structure consisting of a hydrogen transport tube, a first hydrogen barrier layer, and a second hydrogen barrier layer, forming a multi-layered hydrogen barrier system with a double hydrogen barrier layer and a hydrogen transport base layer.

Description

Technical Field

[0001] This application relates to the field of hydrogen transport hose technology, and more specifically, to a non-metallic composite hydrogen transport hose with multiple types of hydrogen barrier layers. Background Technology

[0002] Hydrogen energy, as a clean and efficient secondary energy source, is gaining increasing popularity in energy storage, transportation, and industrial applications. Hydrogen pipelines, as the core component of hydrogen transportation, directly determine the safety and stability of hydrogen delivery. Compared to metal hydrogen pipelines, which are prone to hydrogen embrittlement and cracking, are heavy, and inconvenient to install, non-metallic composite hydrogen hoses, with their advantages of being lightweight, flexible, corrosion-resistant, and highly adaptable, are gradually becoming the mainstream choice for flexible hydrogen transportation in low-pressure and medium-high-pressure scenarios. They are particularly suitable for hydrogen transportation conditions involving pipeline transitions, limited space, and frequent disassembly and reassembly. To suppress material aging, leakage, and hydrogen embrittlement caused by hydrogen molecule permeation, existing non-metallic composite hydrogen hoses mostly adopt a multi-layer composite structure, combined with different types of hydrogen-blocking materials. Their core function is to block hydrogen permeation and extend the pipeline's service life. Simultaneously, they work with connecting joints to achieve a sealed connection with the hydrogen transportation network, meeting the requirements for continuous and safe hydrogen transportation operations.

[0003] Existing non-metallic composite hydrogen transport hoses generally employ a composite structure consisting of a single-layer main tube combined with a single-layer hydrogen-blocking coating or a single-layer hydrogen-blocking liner. The hydrogen-blocking layer is often made of a single polymer hydrogen-blocking material, relying on the material's own density to achieve hydrogen permeation prevention. Furthermore, the hose and the connecting joints mostly use flat-end sleeves, threaded compression, or conventional sealing rings for connection. This type of hydrogen transport hose, with only a single hydrogen-blocking layer design, has limited hydrogen-blocking effect. With long-term use, hydrogen molecules can easily permeate gradually, leading to hydrogen embrittlement and aging of the hose material. This significantly shortens the hose's service life and also poses a considerable safety hazard.

[0004] In view of this, this application proposes a non-metallic composite hydrogen transport hose with multiple forms of hydrogen barrier layers and the ability to predict hydrogen barrier failure. Summary of the Invention

[0005] Technical problem to be solved: The purpose of this application is to provide a non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers, which solves the technical problems mentioned in the background art.

[0006] Technical Solution: This application provides a non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers, including an outer tube. The bottom end of the outer tube is connected to a connecting tube, and the bottom end of the connecting tube is connected to a composite hose. The bottom end of the connecting tube is connected to a first sleeve, and the top end is connected to a second sleeve. The first sleeve is fitted onto the outer wall of the composite hose, and the second sleeve is fitted onto the outer wall of the outer tube. A cavity is provided inside the connecting tube, and a sealing component is slidably connected inside the cavity of the connecting tube. The sealing component is used to detect hydrogen entering the cavity inside the connecting tube. Two sets of locking components are fixedly mirrored at the bottom end of the connecting tube. The bottom end of the sealing component is inserted into the locking component. The locking component is used to lock the sealing component in position inside the connecting tube. The sealing component is unlocked by the locking component so that the sealing component can slide inside the connecting tube. The composite hose includes a hydrogen delivery pipe fixed to the inner wall of a first sleeve. A first hydrogen barrier layer is fixed to the inner wall of the hydrogen delivery pipe, and a second hydrogen barrier layer is fixed to the inner wall of the first hydrogen barrier layer. The top ends of the first and second hydrogen barrier layers are both attached to and sealed to the bottom end of the outer tube. The top end of the hydrogen delivery pipe is flush with the bottom surface of the inner cavity of the connecting tube, so that the first hydrogen barrier layer is sealed on one side of the inner cavity of the connecting tube.

[0007] Furthermore, the sealing assembly includes a lifting ring disposed inside the cavity of the connector tube. The top surface of the lifting ring is attached to the top surface inside the cavity. Multiple hydrogen sensors are embedded and fixed on the bottom surface of the lifting ring. Two sliding rods are connected to the bottom surface of the lifting ring. The sliding rods are connected through to the bottom end of the connector tube. A slider is connected to the bottom end of the sliding rod. A second spring is sleeved on the outer wall of the sliding rod. The second spring is disposed between the bottom end of the connector tube and the top surface of the slider. The slider is slidably connected inside the locking assembly. One side of the locking assembly is inserted into the slider.

[0008] Furthermore, the test sealing assembly also includes a hydrogen barrier ring, which is fixed to the inner wall of the lifting ring and adheres to the outer wall of the first hydrogen barrier layer. The top of the hydrogen barrier ring is slidably inserted between the outer wall of the outer tube and the inner wall of the second sleeve. The hydrogen barrier ring is pushed down by the lifting ring so that the bottom surface of the hydrogen barrier ring adheres to and seals the top of the hydrogen delivery tube, and the hydrogen barrier ring is separated between the outer wall of the first hydrogen barrier layer and the inner cavity.

[0009] Furthermore, the test sealing assembly also includes a second sealing ring, which is sleeved on the outer wall of the lifting ring and fits against the inner wall of the cavity of the connecting pipe.

[0010] Furthermore, the hydrogen barrier ring and the hydrogen delivery pipe are made of the same material, and the thickness of the hydrogen barrier ring is half the thickness of the hydrogen delivery pipe. Multiple hydrogen sensors are also embedded and fixed on the top surface of the lifting ring.

[0011] Furthermore, the locking assembly includes a fixed box fixed to the bottom end of the connecting tube, a locking component is connected through the side wall of the fixed box, one side of the locking component is inserted into the slider, and a flip cover is rotatably connected to the bottom surface of the fixed box. The flip cover has an L-shaped structure, one side of the flip cover is closed and set on the side wall of the fixed box, and an indicator light and a handle are fixed on the outer wall of the flip cover.

[0012] Furthermore, the locking component includes a bolt that slides into the inside of the fixed box, one end of the bolt is fixed with a fixed block, the bottom surface of the fixed block is a beveled structure, one side of the fixed block is inserted into the inside of the slider, and a first spring is sleeved on the outer wall of the bolt, one end of the first spring is connected to the side wall of the fixed box.

[0013] Furthermore, a first inner sealing ring is fixed to the inner wall of the top of the second hydrogen barrier layer, the top of the first inner sealing ring extends outward from the top of the second hydrogen barrier layer, and a second inner sealing ring is fixed to the inner wall of the bottom of the outer pipe, with the top of the first inner sealing ring fitting into the inside of the second inner sealing ring.

[0014] Furthermore, the outer wall of the first inner sealing ring is a stepped structure, and the top of the first inner sealing ring is a ring structure that is narrow at the top and wide at the bottom, while the inner wall of the second inner sealing ring is a ring structure that cooperates with the first inner sealing ring.

[0015] Furthermore, a first sealing ring is fitted onto the outer wall of the top of the first inner sealing ring, and a sealing groove is provided on the inner wall of the second inner sealing ring, with the first sealing ring fitting into the sealing groove.

[0016] Beneficial effects: One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The entire structure consists of a composite hose, a connecting pipe, and an outer connecting pipe, forming a complete hydrogen transport structure. The connecting pipe is connected and fixed to the composite hose and the outer connecting pipe through the first sleeve and the second sleeve, respectively. The internal cavity provides installation and sliding space for the test and sealing components. The composite hose adopts a multi-layer composite structure of hydrogen transport pipe, first hydrogen barrier layer, and second hydrogen barrier layer, forming a multi-form hydrogen barrier system with double hydrogen barrier layer and hydrogen transport base layer. This facilitates the assembly of non-metallic composite hydrogen transport hoses and also helps to improve the safety of hydrogen transport.

[0017] 2. By attaching the tops of the first and second hydrogen-blocking layers to the bottom of the outer connecting pipe to achieve end sealing, and ensuring the top of the hydrogen delivery pipe is flush with the bottom surface of the inner cavity of the connecting pipe, a hydrogen-blocking detection space is reserved. Two sets of locking components at the bottom of the connecting pipe are used to achieve positioning, locking, unlocking, and sliding of the sealing component. The sealing component can detect hydrogen permeation in the cavity in real time, thereby enabling real-time monitoring of the hydrogen penetration of the first and second hydrogen-blocking layers. This allows for the determination of whether the hydrogen-blocking structure inside the hydrogen delivery pipe has failed, enabling timely prevention and avoiding damage caused by the failure of the first and second hydrogen-blocking layers. This achieves early detection of hydrogen-blocking layer failure and improves the safety of hydrogen delivery via the hydrogen delivery hose.

[0018] 3. After the first and second hydrogen barrier layers fail, the sealing assembly is slid down to seal the outer wall of the first hydrogen barrier layer, preventing further hydrogen leakage into the cavity. This avoids hydrogen embrittlement caused by continuous hydrogen entering the connector, achieving active protection after hydrogen barrier failure. This improves the connection safety of the hose connection and further enhances the safety and reliability of non-metallic composite hydrogen transport hoses.

[0019] 4. The sealing assembly is based on a lifting ring with multiple hydrogen sensors embedded at the bottom, enabling comprehensive detection of hydrogen in the cavity of the connector. The detection points are precisely aligned with areas prone to hydrogen leakage, improving the sensitivity and timeliness of hydrogen leak detection, so as to facilitate timely maintenance and replacement of the hydrogen delivery hose.

[0020] 5. A hydrogen barrier ring is fixed to the inner wall of the lifting ring. During normal testing, the hydrogen barrier ring is attached to the outer wall of the first hydrogen barrier layer, and its top end is inserted between the outer connecting pipe and the second sleeve. After the lifting ring is unlocked and slides down, the hydrogen barrier ring moves down accordingly, and its bottom end is attached to the top of the sealed hydrogen delivery pipe, separating the cavity of the connecting pipe from the first hydrogen barrier layer, blocking the hydrogen from continuing to diffuse into the cavity of the connecting pipe, thereby avoiding the continuous entry of hydrogen and causing the connecting pipe to be affected by hydrogen embrittlement.

[0021] 6. A second sealing ring is fitted onto the outer wall of the lifting ring. The sealing ring fits tightly against the inner wall of the cavity of the connecting pipe, filling the gap between the lifting ring and the inner wall of the cavity to form a ring seal. This prevents hydrogen from leaking out of the gap, ensuring that the hydrogen sensor at the top of the lifting ring detects hydrogen that has permeated through the hydrogen isolation ring. The data is accurate and reliable. At the same time, it prevents hydrogen from diffusing outward. When the lifting ring is lowered, the second sealing ring seals the hydrogen that has entered the cavity and is located at the bottom of the lifting ring, squeezing it out and preventing the hydrogen from damaging the connecting pipe.

[0022] 7. The hydrogen barrier ring is made of the same material as the hydrogen delivery pipe, ensuring a tight, gapless fit and stable sealing effect. The thickness of the hydrogen barrier ring is set to half that of the hydrogen delivery pipe, guaranteeing sufficient hydrogen barrier strength. Furthermore, the use of the same material as the hydrogen delivery pipe simulates the gradual material failure due to hydrogen embrittlement in the hydrogen barrier structure. When the hydrogen barrier ring completely fails due to hydrogen embrittlement, it is determined that the hydrogen delivery pipe has reached the same material failure depth and a preset critical upper limit. Multiple hydrogen sensors are added to the top surface of the lifting ring to detect hydrogen. The detection of hydrogen indicates the hydrogen barrier ring's failure. Since the hydrogen barrier ring is made of the same material as the hydrogen delivery pipe and its thickness is half that of the pipe, it indicates that the hydrogen delivery pipe's hydrogen barrier is also about to fail. This allows for timely replacement of the hydrogen delivery hose, preventing hydrogen leakage and ensuring the safety of hydrogen transportation.

[0023] 8. A first inner sealing ring is fixed to the inner wall of the top of the second hydrogen barrier layer, with the top extending outward from the second hydrogen barrier layer. A second inner sealing ring is fixed to the inner wall of the bottom of the outer pipe. The first inner sealing ring is inserted into the second inner sealing ring to form an embedded nested seal, which blocks hydrogen from seeping through the joint between the hose and the outer pipe end, strengthens the end hydrogen barrier sealing effect, and avoids sealing failure caused by misalignment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers according to the present invention.

[0025] Figure 2 This is a schematic diagram of the connection structure between the composite hose and the connecting pipe of the present invention.

[0026] Figure 3 This is a schematic diagram of the internal connection structure of the connecting pipe of the present invention.

[0027] Figure 4 This is a schematic diagram of the internal structure connecting the locking component and the sealing component of the present invention.

[0028] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0029] Figure 6 This is a schematic diagram of the test and seal assembly structure of the present invention.

[0030] Figure 7 This is a schematic diagram of the bottom connection structure of the lifting ring of the present invention.

[0031] Figure 8 This is a schematic diagram of the structure of the sealing assembly of the present invention in the downward sliding state inside the connector.

[0032] Figure 9 This is a schematic diagram of the external pipe structure of the present invention.

[0033] Figure 10 This is a schematic diagram of the composite hose structure of the present invention.

[0034] The following are the labeling instructions in the diagram: 100, Composite hose; 110, Hydrogen delivery pipe; 120, First hydrogen barrier layer; 130, Second hydrogen barrier layer; 140, First inner sealing ring; 141, First sealing ring; 200, Connecting pipe; 210, First sleeve; 220, Second sleeve; 300, Outer pipe; 310, Second inner sealing ring; 311, Sealing groove; 400, Fixed locking assembly; 410, Fixing box; 420, Insert locking component; 421, Pull bolt; 422, First spring; 423, Fixed insertion block; 430, Flip cover; 440, Indicator light; 450, Handle; 500, Testing and sealing assembly; 510, Lifting ring; 520, Hydrogen sensor; 530, Hydrogen barrier ring; 540, Second sealing ring; 550, Sliding rod; 560, Second spring; 570, Sliding block. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Reference Figures 1-10This application provides a non-metallic composite hydrogen transport hose with multiple hydrogen barrier layers, including an outer connector 300. The bottom end of the outer connector 300 is connected to a connecting connector 200, and the bottom end of the connecting connector 200 is connected to a composite hose 100. A first sleeve 210 is connected through the bottom end of the connecting connector 200, and a second sleeve 220 is connected through the top end. The first sleeve 210 is fitted onto the outer wall of the composite hose 100, and the second sleeve 220 is fitted onto the outer wall of the outer connector 300. A cavity is provided inside the connecting connector 200. A sealing component 500 is slidably connected inside the cavity of the connecting pipe 200. The sealing component 500 is used to detect hydrogen gas entering the cavity inside the connecting pipe 200. Two sets of locking components 400 are fixedly mirrored at the bottom end of the connecting pipe 200. The bottom end of the sealing component 500 is inserted into the locking component 400. The locking component 400 is used to lock the sealing component 500 in position inside the connecting pipe 200. The sealing component 500 is unlocked by the locking component 400 so that the sealing component 500 can slide inside the connecting pipe 200. The composite hose 100 includes a hydrogen delivery pipe 110 fixed to the inner wall of the first sleeve 210. A first hydrogen barrier layer 120 is fixed to the inner wall of the hydrogen delivery pipe 110, and a second hydrogen barrier layer 130 is fixed to the inner wall of the first hydrogen barrier layer 120. The top ends of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 are both attached and sealed to the bottom end of the outer connector 300. The top end of the hydrogen delivery pipe 110 is flush with the bottom surface of the inner cavity of the connecting pipe 200, so that the first hydrogen barrier layer 120 is sealed on one side of the inner cavity of the connecting pipe 200. The entire structure consists of a composite hose 100, a connecting pipe 200, and an outer connecting pipe 300, forming a complete hydrogen transport structure. The connecting pipe 200 is connected and fixed to the composite hose 100 and the outer connecting pipe 300 through a first sleeve 210 and a second sleeve 220, respectively. The internal cavity provides installation and sliding space for the test sealing component 500. The composite hose 100 adopts a multi-layer composite structure of hydrogen transport pipe 110, first hydrogen barrier layer 120, and second hydrogen barrier layer 130, forming a multi-form hydrogen barrier system with double hydrogen barrier layer and hydrogen transport base layer. This facilitates the assembly of non-metallic composite hydrogen transport hoses and also helps to improve the safety of hydrogen transport by the hydrogen transport hose. By attaching the tops of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 to the bottom of the outer connecting pipe 300, the end is sealed. The top of the hydrogen delivery pipe 110 is flush with the bottom surface of the inner cavity of the connecting pipe 200, leaving space for hydrogen barrier detection. The two sets of locking components 400 set at the bottom of the connecting pipe 200 are used to realize the positioning, locking and unlocking of the sealing component 500. The sealing component 500 can detect the hydrogen permeation in the cavity in real time, thereby enabling real-time monitoring of the hydrogen permeability of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130. This allows for the determination of whether the hydrogen barrier structure set in the hydrogen delivery pipe 110 has failed, so as to prevent damage caused by the failure of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130. This enables early detection of hydrogen barrier failure and improves the safety of hydrogen delivery hoses for hydrogen transportation. After detecting the failure of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130, the sealing assembly 500 is slid down to seal the outer wall of the first hydrogen barrier layer 120, preventing hydrogen from further leaking into the cavity. This avoids the continuous entry of hydrogen into the connecting pipe 200 and its hydrogen embrittlement, thus achieving active protection after hydrogen barrier failure. This improves the connection safety of the hose connection and further enhances the safety and reliability of the non-metallic composite hydrogen transport hose.

[0039] In this embodiment, the sealing assembly 500 includes a lifting ring 510 disposed inside the cavity of the connecting pipe 200. The top surface of the lifting ring 510 is attached to the top surface inside the cavity. Multiple hydrogen sensors 520 are embedded and fixed on the bottom surface of the lifting ring 510. Two sliding rods 550 are connected to the bottom surface of the lifting ring 510. The sliding rods 550 are connected through the bottom end of the connecting pipe 200. A slider 570 is connected to the bottom end of the sliding rods 550. A second spring 560 is sleeved on the outer wall of the sliding rods 550. The second spring 560 is disposed between the bottom end of the connecting pipe 200 and the top surface of the slider 570. The slider 570 is slidably connected inside the locking assembly 400. One side of the locking assembly 400 is inserted into the slider 570. The sealing assembly 500 is based on the lifting ring 510, with multiple hydrogen sensors 520 embedded at the bottom. This enables all-round detection of hydrogen in the cavity of the connector 200. The detection points are precisely targeted at the high-incidence areas of hydrogen barrier layer penetration, improving the sensitivity and timeliness of hydrogen leakage detection, so as to maintain and replace the hydrogen delivery hose in a timely manner. The slide bar 550 passes through the bottom end of the connecting pipe 200 and, together with the second spring 560 and the slider 570, forms an elastic lifting structure. Pushing the slider 570 upward and compressing the spring causes the locking assembly 400 to be inserted into the slider 570 to lock it, thus positioning the lifting ring 510. After unlocking, the spring can automatically push the slider 570 and the lifting ring 510 down to reset, ensuring the stability of locking the slider 570 and the lifting ring 510 and improving the convenience of unlocking operations.

[0040] In this embodiment, the test sealing assembly 500 further includes a hydrogen barrier ring 530, which is fixed to the inner wall of the lifting ring 510 and adheres to the outer wall of the first hydrogen barrier layer 120. The top end of the hydrogen barrier ring 530 is slidably inserted between the outer wall of the outer tube 300 and the inner wall of the second sleeve 220. The hydrogen barrier ring 530 is pushed down by the lifting ring 510 so that the bottom surface of the hydrogen barrier ring 530 adheres to and seals the top end of the hydrogen delivery tube 110, and the hydrogen barrier ring 530 is separated between the outer wall of the first hydrogen barrier layer 120 and the inner cavity. A hydrogen barrier ring 530 is fixed to the inner wall of the lifting ring 510. During normal testing, the hydrogen barrier ring 530 is attached to the outer wall of the first hydrogen barrier layer 120, and its top end is inserted between the outer connecting pipe 300 and the second sleeve 220. After the lifting ring 510 is unlocked and slides down, the hydrogen barrier ring 530 moves down accordingly, and its bottom end is attached to the top end of the sealed hydrogen delivery pipe 110, separating the cavity of the connecting pipe 200 from the first hydrogen barrier layer 120, blocking the continued diffusion of hydrogen into the cavity of the connecting pipe 200, thereby preventing the continuous entry of hydrogen from causing hydrogen embrittlement of the connecting pipe 200.

[0041] In this embodiment, the test sealing assembly 500 further includes a second sealing ring 540, which is sleeved on the outer wall of the lifting ring 510 and fits against the inner wall of the cavity of the connecting pipe 200. A second sealing ring 540 is fitted onto the outer wall of the lifting ring 510. The sealing ring fits tightly against the inner wall of the cavity of the connecting pipe 200, filling the gap between the lifting ring 510 and the inner wall of the cavity, forming an annular seal, blocking hydrogen from leaking from the gap, ensuring that the hydrogen sensor 520 at the top of the lifting ring 510 detects the hydrogen permeated by the hydrogen isolation ring 530, and the data is accurate and reliable, while preventing hydrogen from diffusing outward. When the lifting ring 510 is lowered, the second sealing ring 540 seals the cavity, allowing the hydrogen gas that has entered the cavity and is located at the bottom of the lifting ring 510 to be squeezed out, thus preventing the hydrogen gas from damaging the connecting pipe 200.

[0042] In this embodiment, the hydrogen isolation ring 530 and the hydrogen delivery pipe 110 are made of the same material, the thickness of the hydrogen isolation ring 530 is half the thickness of the hydrogen delivery pipe 110, and multiple hydrogen sensors 520 are also embedded and fixed on the top surface of the lifting ring 510. The hydrogen barrier ring 530 uses the same material as the hydrogen pipeline 110, ensuring a tight fit without gaps and a stable sealing effect. Meanwhile, setting the thickness of the hydrogen barrier ring 530 to half that of the hydrogen delivery pipe 110 not only ensures sufficient hydrogen barrier strength but also simulates the gradual material failure depth caused by hydrogen embrittlement when the hydrogen barrier structure fails due to hydrogen embrittlement. When the hydrogen barrier ring 530 completely fails due to hydrogen embrittlement, it is determined that the material failure depth of the hydrogen delivery pipe 110 is the same and has reached a preset critical upper limit. Furthermore, by adding multiple hydrogen sensors 520 to the top surface of the lifting ring 510, hydrogen can be detected through the hydrogen sensors 520 at the top of the lifting ring 510. When hydrogen is detected, it is known that the hydrogen barrier ring 530 has failed. Since the hydrogen barrier ring 530 is made of the same material as the hydrogen delivery pipe 110 and its thickness is half that of the hydrogen delivery pipe 110, it can be known that the hydrogen barrier of the hydrogen delivery pipe 110 is also about to fail. This allows for timely replacement of the hydrogen delivery hose, preventing hydrogen leakage and ensuring the safety of hydrogen transportation.

[0043] In this embodiment, the locking assembly 400 includes a fixing box 410 fixed to the bottom end of the connecting tube 200. A locking component 420 is connected through the side wall of the fixing box 410. One side of the locking component 420 is inserted into the slider 570. A flip cover 430 is rotatably connected to the bottom surface of the fixing box 410. The flip cover 430 has an L-shaped structure. One side of the flip cover 430 is closed on the side wall of the fixing box 410. An indicator light 440 and a handle 450 are fixed on the outer wall of the flip cover 430. The locking assembly 400 uses a fixed box 410 as a protective shell to enclose the slider 570 and the locking component 420, preventing damage from external forces and dust. The locking component 420 is inserted into the slider 570 to achieve locking. The L-shaped flip cover 430 can be flipped open and closed for easy operation of the locking component 420 and inspection of the internal structure. The outer wall of the flip cover 430 integrates an indicator light 440 and a handle 450. The indicator light 440 intuitively displays the running, warning, and failure status, and the handle 450 facilitates the opening and closing of the flip cover 430.

[0044] In this embodiment, the locking component 420 includes a bolt 421 that slides into the fixed box 410. One end of the bolt 421 is fixed with a fixed insertion block 423. The bottom surface of the fixed insertion block 423 is a sloping structure. One side of the fixed insertion block 423 is inserted into the slider 570. A first spring 422 is sleeved on the outer wall of the bolt 421. One end of the first spring 422 is connected to the side wall of the fixed box 410. The locking component 420 adopts an elastic structure of bolt 421, fixed insertion block 423, and first spring 422. The bottom surface of the fixed insertion block 423 is sloping. When the slider 570 is pushed upward, the slider 570 presses the sloping surface and automatically pushes the fixed insertion block 423 back. After it is in place, the first spring 422 pulls the fixed insertion block 423 to automatically insert into the slider 570, realizing one-click automatic locking. Pulling the bolt 421 can drive the fixed insertion block 423 out of the slider 570 for quick unlocking. After unlocking, the second spring 560 can automatically push the lifting ring 510 to reset.

[0045] In this embodiment, a first inner sealing ring 140 is fixed to the inner wall of the top of the second hydrogen barrier layer 130, with the top of the first inner sealing ring 140 extending outward from the top of the second hydrogen barrier layer 130. A second inner sealing ring 310 is fixed to the inner wall of the bottom of the outer pipe 300, with the top of the first inner sealing ring 140 fitting into the interior of the second inner sealing ring 310. The first inner sealing ring 140 is fixed to the inner wall of the top of the second hydrogen barrier layer 130, with the top extending outward from the second hydrogen barrier layer 130. The second inner sealing ring 310 is fixed to the inner wall of the bottom of the outer pipe 300, with the first inner sealing ring 140 fitting into the interior of the second inner sealing ring 310, forming an embedded nested seal. This prevents hydrogen from seeping through the joint between the hose and the end of the outer pipe 300, strengthens the end hydrogen barrier sealing effect, and avoids sealing failure caused by misalignment.

[0046] In this embodiment, the outer wall of the first inner sealing ring 140 is a stepped structure, and the top of the first inner sealing ring 140 is a ring structure that is narrow at the top and wide at the bottom. The inner wall of the second inner sealing ring 310 is a ring structure that mates with the first inner sealing ring 140. The first inner sealing ring 140 has a stepped outer wall and a conical ring structure that is narrow at the top and wide at the bottom. The inner wall of the second inner sealing ring 310 has a matching ring structure, forming a dual positioning structure of conical nesting and stepped limiting. During insertion, it automatically guides the alignment. The stepped structure limits the insertion depth to avoid over-insertion, while increasing the sealing and contact area to prevent loosening and slippage.

[0047] In this embodiment, a first sealing ring 141 is sleeved on the outer wall of the top end of the first inner sealing ring 140, and a sealing groove 311 is opened on the inner wall of the second inner sealing ring 310. The first sealing ring 141 is inserted into the sealing groove 311. When the first inner sealing ring 140 is inserted, the sealing ring is precisely embedded in the sealing groove 311, forming an embedded annular seal, which completely fills the tiny gap between the inner sealing rings and achieves complete end sealing under high pressure conditions.

[0048] Specifically, according to Figures 1-10 As shown, the worker threaded the composite hose 100 into the inside of the first sleeve 210 until the top of the hydrogen delivery pipe 110 was flush with the bottom surface of the inner cavity of the connecting pipe 200. The first hydrogen-blocking layer 120 and the second hydrogen-blocking layer 130 in the composite hose 100 were both made of high-polymer hydrogen-blocking material. Then, the worker held the handle 450 and flipped the cover 430 to open the fixing box 410. Then, the worker pushed the slider 570 upward to compress the second spring 560. The slide rod 550 pushed the lifting ring 510 up until the lifting ring 510 was attached to the top surface of the inner cavity of the connecting pipe 200. The fixed insertion block 423 was inserted into the slider 570, and the first spring 422 was stretched. The fixed insertion block 423 fixed the slider 570. The position of the lifting ring 510 is ensured to be inside the connecting pipe 200, so that the outer wall of the first hydrogen barrier layer 120 is exposed in the inner cavity of the connecting pipe 200. The hydrogen content in the cavity is monitored by the hydrogen sensor 520 on the bottom surface of the lifting ring 510. The inner wall of the flip cover 430 integrates a control circuit board and a battery. The battery powers the control circuit board. The control circuit board adopts a commonly used control circuit in the prior art. The monitoring signal is sent to the control circuit board through the hydrogen sensor 520, and the control circuit board controls the indicator light 440, which is set with green light, yellow light and red light. The first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 are preferably made of high-density polyethylene (HDPE) hydrogen barrier material. Then, the connecting pipe 200 is threaded onto the outer connecting pipe 300, which is pre-connected to the conveying pipeline. When the connecting pipe 200 is connected to the outer connecting pipe 300, the first inner sealing ring 140 is inserted into the second inner sealing ring 310 until the top of the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 are fitted and sealed with the bottom of the outer connecting pipe 300. The first inner sealing ring 140 is fitted and sealed with the second inner sealing ring 310, and the first sealing ring 141 is inserted into the sealing groove 311. This makes the connection between the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 and the outer connecting pipe 300 form a multi-level seal, improving the sealing effect. Hydrogen is then transported through a multi-layered composite hose 100. When the hydrogen sensor 520 on the bottom of the lifting ring 510 does not detect hydrogen, the indicator light 440 will show green. However, after long-term use, if the hydrogen sensor 520 on the bottom of the lifting ring 510 detects that hydrogen has entered the cavity of the connecting pipe 200, it means that the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 are affected by hydrogen embrittlement, causing hydrogen to enter the cavity. At this time, the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 of the composite hose 100 fail to block hydrogen. The hydrogen passing through the first hydrogen barrier layer 120 and the second hydrogen barrier layer 130 will act on the inner wall of the hydrogen delivery pipe 110 and turn the indicator light 440 yellow. After the staff noticed that indicator light 440 had turned yellow, they pulled the bolt 421 to remove the fixed insert 423 from inside the slider 570. The compressed second spring 560 pushed the slider 570 downward, which in turn pulled the slide rod 550 down. The slide rod 550 then lowered the lifting ring 510, allowing the hydrogen gas inside the cavity to pass through the failed first hydrogen barrier layer 120 and second hydrogen barrier layer 130 back into the delivery pipe. This continued until the lifting ring 510 was attached to the bottom surface of the inner cavity of the connecting pipe 200, and the lifting ring 510 caused the hydrogen barrier ring 530 to slide against the outer wall of the first hydrogen barrier layer 120 until the bottom end of the hydrogen barrier ring 530 was attached to the top end of the hydrogen delivery pipe 110. The cavity of the connector 200 is sealed, and the cavity of the connector 200 is mainly located on the top surface of the lifting ring 510 to prevent hydrogen from continuing to leak into the cavity, thereby preventing the connector 200 from being affected by hydrogen embrittlement and ensuring the stability and safety of the connector 200 connection. At this time, the hydrogen sensor 520 on the top surface of the lifting ring 510 is used to detect the hydrogen in the cavity. The hydrogen isolation ring 530 is made of the same material as the hydrogen delivery pipe 110, and its thickness is half that of the hydrogen delivery pipe 110. Both the hydrogen delivery pipe 110 and the hydrogen isolation ring 530 are made of thermoplastic composite material, and thermoplastic composite material has the advantage of good chemical corrosion resistance and has a certain resistance to hydrogen embrittlement. Then, after further continuous hydrogen supply, if the hydrogen sensor 520 on the top surface of the lifting ring 510 detects that hydrogen has entered the cavity, it means that the hydrogen has also passed through the hydrogen barrier ring 530. This indicates that the hydrogen delivery pipe 110 in the entire composite hose 100 is also affected by hydrogen embrittlement and is about to fail. The control circuit board will display the indicator light 440 as red to give an early warning of the impending failure and leakage of the hydrogen delivery pipe 110. The staff will promptly stop the hydrogen supply and replace the composite hose 100 and the hydrogen barrier ring 530 to ensure the safety of the hydrogen delivery hose for hydrogen supply.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. All electrical components mentioned herein are electrically connected to the main controller and 220V AC mains power, and the main controller is a common existing technology such as a computer that performs control functions. Content not described in detail in this specification is prior art known to those skilled in the art.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer, characterized in that: The device includes an outer tube, a connecting tube connected to the bottom end of the outer tube, a composite hose connected to the bottom end of the connecting tube, a first sleeve connected through the bottom end of the connecting tube, and a second sleeve connected through the top end of the connecting tube. The first sleeve is fitted onto the outer wall of the composite hose, and the second sleeve is fitted onto the outer wall of the outer tube. A cavity is provided inside the connecting tube, and a sealing component is slidably connected inside the cavity of the connecting tube. The sealing component is used to detect hydrogen entering the cavity inside the connecting tube. Two sets of locking components are fixedly mirrored at the bottom end of the connecting tube. The bottom end of the sealing component is inserted into the locking component. The locking component is used to lock the sealing component in position inside the connecting tube. The sealing component is unlocked by the locking component so that the sealing component can slide inside the connecting tube. The composite hose includes a hydrogen delivery pipe fixed to the inner wall of the first sleeve, a first hydrogen barrier layer fixed to the inner wall of the hydrogen delivery pipe, a second hydrogen barrier layer fixed to the inner wall of the first hydrogen barrier layer, the top ends of the first and second hydrogen barrier layers being attached and sealed to the bottom end of the outer tube, and the top end of the hydrogen delivery pipe being flush with the bottom surface of the inner cavity of the connecting tube so that the first hydrogen barrier layer is sealed on one side of the inner cavity of the connecting tube. The sealing assembly includes a lifting ring disposed inside the cavity of the connector tube. The top surface of the lifting ring is attached to the top surface inside the cavity. Multiple hydrogen sensors are embedded and fixed on the bottom surface of the lifting ring. Two sliding rods are connected to the bottom surface of the lifting ring. The sliding rods are connected to the bottom end of the connector tube. A slider is connected to the bottom end of the sliding rod. A second spring is sleeved on the outer wall of the sliding rod. The second spring is disposed between the bottom end of the connector tube and the top surface of the slider. The slider is slidably connected inside the locking assembly. One side of the locking assembly is inserted into the inside of the slider. The test sealing assembly also includes a hydrogen barrier ring, which is fixed to the inner wall of the lifting ring and is attached to the outer wall of the first hydrogen barrier layer. The top of the hydrogen barrier ring is slidably inserted between the outer wall of the outer tube and the inner wall of the second sleeve. The hydrogen barrier ring is pushed down by the lifting ring so that the bottom surface of the hydrogen barrier ring is attached to and sealed to the top of the hydrogen delivery tube, and the hydrogen barrier ring is separated between the outer wall of the first hydrogen barrier layer and the inner cavity. The test sealing assembly also includes a second sealing ring, which is sleeved on the outer wall of the lifting ring and fits against the inner wall of the cavity of the connecting pipe. The hydrogen isolation ring and the hydrogen delivery pipe are made of the same material. The thickness of the hydrogen isolation ring is half the thickness of the hydrogen delivery pipe. Multiple hydrogen sensors are also embedded and fixed on the top surface of the lifting ring.

2. The non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer according to claim 1, characterized in that: The locking assembly includes a fixed box fixed to the bottom end of the connecting tube. A locking component is connected through the side wall of the fixed box. One side of the locking component is inserted into the slider. A flip cover is rotatably connected to the bottom surface of the fixed box. The flip cover has an L-shaped structure. One side of the flip cover is closed and set on the side wall of the fixed box. An indicator light and a handle are fixed on the outer wall of the flip cover.

3. A non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer according to claim 2, characterized in that: The locking component includes a bolt that slides into the inside of the fixed box. One end of the bolt is fixed with a fixed block. The bottom surface of the fixed block is a sloping structure. One side of the fixed block is inserted into the inside of the slider. A first spring is sleeved on the outer wall of the bolt. One end of the first spring is connected to the side wall of the fixed box.

4. A non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer according to claim 1, characterized in that: A first inner sealing ring is fixed to the inner wall of the top of the second hydrogen barrier layer. The top of the first inner sealing ring extends outward from the top of the second hydrogen barrier layer. A second inner sealing ring is fixed to the inner wall of the bottom of the outer pipe. The top of the first inner sealing ring is inserted into the inside of the second inner sealing ring.

5. A non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer according to claim 4, characterized in that: The outer wall of the first inner sealing ring is a stepped structure, and the top of the first inner sealing ring is a ring structure that is narrow at the top and wide at the bottom. The inner wall of the second inner sealing ring is a ring structure that cooperates with the first inner sealing ring.

6. A non-metallic composite hydrogen transport hose with a multi-form hydrogen barrier layer according to claim 5, characterized in that: The first inner sealing ring has a first sealing ring fitted onto the outer wall of its top end, and the second inner sealing ring has a sealing groove on its inner wall, with the first sealing ring fitting into the sealing groove.

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