Hydrogen energy conveying metal hose with multi-layer strong sealing structure

Abstract

The invention discloses a hydrogen energy conveying metal hose with a multi-layer strong sealing structure, and belongs to the technical field of hydrogen energy conveying, the hydrogen energy conveying metal hose comprises a metal hose body, one end of the metal hose body is provided with a connector assembly, and the other end of the metal hose body is provided with a socket assembly; the socket assembly comprises a mounting ring seat, a first sealing ring is arranged on the inner ring wall of the mounting ring seat, a plurality of pressure difference sensing units are arranged on the side wall of the mounting ring seat and located between the second sealing ring and the third sealing ring, and a top ring enclosing unit is arranged at the top of the mounting ring seat. According to the metal hose, multi-level sealing treatment of hydrogen conveyed in the metal hose can be achieved, in the hydrogen conveying process, after the first-level sealing structure fails in sealing under the superposition effect of hydrogen embrittlement and mechanical stress, the top ring enclosing unit is triggered to stretch out, and hydrogen is physically isolated from other-level sealing structures; and hydrogen between the second waterproof breathable film and the second-level sealing structure can be actively absorbed, so that the hydrogen embrittlement process of subsequent sealing is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy transportation technology, and more specifically, to a hydrogen energy transportation metal hose with a multi-layer strong sealing structure. Background Technology

[0002] With the continued growth in demand for hydrogen transportation, pipeline transportation is an inevitable trend for achieving long-distance, large-scale transportation of hydrogen in the mature stage of the hydrogen energy industry, and it is also the most economical way.

[0003] Metal hoses are an important component in the connection pipelines of modern industrial equipment. Metal hoses possess excellent flexibility, repeated bending resistance, corrosion resistance, high temperature resistance, bending resistance, tensile strength, and lateral pressure resistance. Therefore, metal hoses are widely used in hydrogen transportation.

[0004] Currently, when transporting hydrogen, existing metal hoses mostly use common sealing components such as sealing rings to seal the joints. However, over long-term use, the joints of the metal hoses are subjected to mechanical stresses such as vibration. Although sealing rings can provide elastic cushioning, the sealing material is prone to deterioration (hydrogen embrittlement) and cracking after prolonged contact with the hydrogen being transported in the pipeline. The combined effects of hydrogen embrittlement and long-term mechanical stress can easily lead to seal failure at the metal hose joints, resulting in hydrogen leakage. Leaking hydrogen can cause environmental pollution, poisoning, and in severe cases, even fires and explosions, posing a significant safety hazard.

[0005] In view of this, we propose a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. Summary of the Invention

[0006] Technical problem to be solved: The purpose of this invention is to provide a hydrogen energy transportation metal hose with a multi-layer strong sealing structure, which solves the technical problem mentioned in the background art.

[0007] Technical solution: The technical solution of the present invention provides a hydrogen energy transmission metal hose with a multi-layer strong sealing structure, including a metal hose body, an interface component on one end of the metal hose body, and a socket component on the other end, wherein the socket component on the end of one hydrogen energy transmission metal hose can be detachably and fixedly installed inside the interface component on the end of another hydrogen energy transmission metal hose. The socket assembly includes a mounting ring seat. The inner ring wall of the mounting ring seat is provided with a first sealing ring, and the outer ring wall is provided with a second sealing ring and a third sealing ring arranged vertically. The side wall of the mounting ring seat is provided with a plurality of differential pressure sensing units between the second sealing ring and the third sealing ring. The top of the mounting ring seat is provided with a top ring blocking unit. The first sealing ring is a first-level sealing structure, the second sealing ring is a second-level sealing structure, and the third sealing ring is a third-level sealing structure. The top ring containment unit includes a retractable ring seat that is connected to the inner cavity of the differential pressure sensing unit, and an air cylinder is sleeved at the end of the ring seat. The air cylinder assembly includes a one-way channel that allows air to enter the air cylinder assembly in one direction as the air cylinder assembly extends synchronously with the gradually extending ring seat assembly, and the air inlet of the one-way channel is located above the second sealing ring. The differential pressure sensing unit includes a plug structure, and when the plug structure changes from an initial static state to an active state, it can force the gas in the differential pressure sensing unit into the ring seat and drive the ring seat to extend.

[0008] As an optional solution to the technical solution of this invention, the interface component includes a mounting end cap connected to the end of the metal flexible tube body; Several differential pressure sensing units are arranged in a circular array.

[0009] As an optional solution to the technical solution of this invention document, the plug structure includes a front sealing plug, and a front cylinder seat is provided on one side of the front sealing plug; The front cylinder seat is equipped with a liquid chamber and a connecting chamber, and the liquid chamber and the connecting chamber are interconnected. A diaphragm is connected to the end of the connecting cavity and the liquid cavity, and the diaphragm is sealed at the outlet of the liquid cavity. The liquid cavity is filled with a liquid water medium, and the connecting cavity is provided with a reaction medium. A reserved opening is provided on the side wall of the front cylinder seat at the position corresponding to the position of the connecting cavity, and a first waterproof and breathable membrane is connected in the reserved opening; An insertion hole is provided on one end of the front cylinder seat near the connecting cavity. A passive insertion pin is slidably inserted into the insertion hole, and the pointed end of the passive insertion pin extends into the connecting cavity and faces the diaphragm. A first spring is sleeved around the passive insertion pin, with one end of the first spring connected to the end of the front sleeve and the other end connected to the front sealing plug. A recessed groove is provided on the side wall of the socket, and a wedge-shaped block is slidably inserted in the recessed groove. A second spring is also provided in the recessed groove, and one end of the second spring is connected to the end of the recessed groove, while the other end is connected to the end of the wedge-shaped block that extends into the recessed groove. The passive insert has multiple annular wedge-shaped slots evenly distributed on its sidewall, which are adapted to the wedge-shaped ends of the wedge-shaped block.

[0010] As an optional solution of the technical solution in this invention document, the differential pressure sensing unit also includes a column groove disposed on the side wall of the mounting ring seat and between the second sealing ring and the third sealing ring, and a partition is detachably sealed in the column groove. The front sealing plug slides inside the column groove, and the end of the front cylinder seat away from the connecting cavity is connected to the partition.

[0011] As an optional solution to the technical solution of this invention document, the ring seat includes an annular groove disposed on the top of the mounting ring seat and connected to the column groove; The annular sealing seat is slidably inserted into the interior of the annular groove; The annular groove is also equipped with a third spring, one end of which is connected to the end of the annular blocking seat that extends into the annular groove, and the other end is connected to the bottom wall of the annular groove.

[0012] As an optional solution of the technical solution in this invention document, the gas cylinder component also includes an annular bellows cover that is sleeved and fixed to the outside of the top of the annular containment seat, and the annular bellows cover is also provided with a hydrogen absorption part for absorbing hydrogen. An extended annular groove is provided at the top of the mounting ring seat corresponding to the position of the annular groove to accommodate the annular bellows cover. The top wall of the inner cavity of the annular bellows cover is connected to the top of the annular blocking seat, and the bottom of the annular bellows cover is connected to the bottom wall of the extended annular groove. The one-way channel includes a hydrogen absorption line, which is equipped with a one-way inlet valve. One end of the hydrogen absorption pipeline is fixedly connected to the bottom of the annular bellows cover, and the other end passes through the inside of the mounting ring seat and through the side wall of the mounting ring seat. The end of the mounting ring seat away from the annular bellows cover is a one-way air inlet.

[0013] As an optional solution to the technical solution of this invention, the differential pressure sensing unit further includes a rear sealing plug, a control circuit board, a pressure relief channel, and a second waterproof and breathable membrane. The rear sealing plug slides within the column groove, and the rear sealing plug and the front sealing plug are located on the left and right sides of the partition, respectively. A rear insulating cylinder seat is provided on one side of the rear sealing plug; An insulating moving rod is slidably inserted into the end of the rear insulating cylinder seat. A fourth spring is sleeved around the outer periphery of the insulating moving rod. One end of the fourth spring is connected to the end of the rear insulating cylinder seat, and the other end is connected to the rear sealing plug. A driven metal spring is connected to one end of the insulating rod that extends into the inner cavity of the rear insulating cylinder seat; A fixed excitation plate is connected to the inner wall of the rear insulating cylinder seat, and the surface of the fixed excitation plate is flush with the surface of the inner wall of the rear insulating cylinder seat. The end of the rear insulating cylinder seat away from the insulating moving rod is connected to the partition plate, and the end of the insulating moving rod away from the rear insulating cylinder seat is connected to the rear sealing plug; The control circuit board is equipped with a wireless transmission module, and the control circuit board is fixedly mounted on the partition. When the fourth spring is in the initial relaxed state, the free end of the driven metal spring elastically abuts against the surface of the inner wall of the rear insulating cylinder seat, and at this time, the driven metal spring and the fixed excitation plate do not contact each other. The pressure relief channel is set inside the mounting ring seat. One end of the pressure relief channel is connected to the column groove, and the end of the pressure relief channel connected to the column groove corresponds to the position of the rear insulating cylinder seat. The other end of the pressure relief channel passes through the end of the mounting ring seat. The second waterproof and breathable membrane is located at the end of the pressure relief channel away from the column groove and is connected to the end of the mounting ring seat.

[0014] As an optional solution of the technical solution in this invention document, both the driven metal spring and the fixed excitation plate are electrically connected to the control circuit board, and when the driven metal spring and the fixed excitation plate are in contact, the control circuit board is triggered to control the wireless transmission module to send out an alarm signal.

[0015] As an optional solution to the technical solution of this invention, the mounting ring seat in the socket assembly at the end of one hydrogen energy transmission metal hose is threaded to the interior of the mounting end cap in the interface assembly at the end of another hydrogen energy transmission metal hose.

[0016] As an optional solution of the technical solution in this invention document, both the end cap and the end of the mounting ring are connected with connecting flanges, and the connecting flange connected to the end of the mounting ring in the socket assembly of one hydrogen energy transmission metal hose and the connecting flange connected to the end cap in the interface assembly of another hydrogen energy transmission metal hose are fixedly connected by bolts.

[0017] Beneficial effects: One or more technical solutions provided in this invention have at least the following technical effects or advantages: 1. This metal hose can achieve multi-level sealing treatment for the hydrogen transported inside. During the hydrogen transport process, when the first-level sealing structure (i.e., the first sealing ring) fails due to the combined effects of hydrogen embrittlement and mechanical stress, it is blocked by the second-level sealing structure (i.e., the second sealing ring). As the gas pressure in the space between the first-level and second-level sealing structures gradually increases and drives the front sealing plug to move, the moving front sealing plug continuously injects gas into the annular groove, thereby triggering the top ring blocking unit to extend and forcibly physically isolate the hydrogen from the second-level sealing structure (i.e., the second sealing ring). This active isolation mechanism can effectively reduce the amount of hydrogen in contact with the second-level sealing structure, thereby effectively avoiding the accelerated aging of the second-level sealing structure due to long-term exposure to a high hydrogen concentration environment. This helps to extend the overall service life of the sealing structure in the metal hose and improve the sealing performance during hydrogen transport.

[0018] 2. When the front sealing plug is moved by air pressure, the moving front sealing plug drives the passive insert to puncture the diaphragm, causing the liquid water medium to overflow into the connecting cavity and react with the reaction medium, rapidly releasing a large amount of gas into the annular groove. This accelerates the extension speed of the top ring blocking unit, shortens the physical isolation time of the top ring blocking unit, and also increases the air pressure in the annular groove, further pressing the end of the top ring blocking unit against the end of the mounting end cap cavity, thus increasing the sealing effect of the physical isolation of the top ring blocking unit.

[0019] 3. The mounting ring seat in the socket assembly at the end of one hydrogen energy transmission metal hose is detachably installed to the interior of the mounting end cap in the interface assembly at the end of another hydrogen energy transmission metal hose via bolt or thread connection. This completes the assembly of the metal hose. After the metal hose is put into use, when the first-level sealing structure (i.e., the first sealing ring) fails under the combined effects of hydrogen embrittlement and mechanical stress, triggering the extension of the top ring blocking unit and physically isolating the hydrogen from other levels of sealing, the liquid water medium overflows into the connection cavity and reacts with the reaction medium, rapidly releasing a large amount of gas into the annular groove. This causes the high gas pressure within the annular groove to push the end of the top ring blocking unit against the mounting end cap. Applying pressure to the end of the end cap cavity further increases the friction between the thread and the groove in a threaded connection, or between the thread on the stud of a bolt and the groove in a nut in a bolted connection. This further increases the frictional force required to overcome when the connection loosens, thus enhancing the connection strength at the metal hose joint when the first-level sealing structure fails. This effectively prevents the hose joint from loosening due to mechanical stress after the first-level sealing structure fails during hydrogen transport, which would affect the sealing performance of the metal hose during hydrogen transport. Consequently, it helps to further enhance the sealing stability of the metal hose during hydrogen transport.

[0020] 4. When the first-level sealing structure fails due to the combined effects of hydrogen embrittlement and mechanical stress, and before the top ring blocking unit extends and completely blocks the hydrogen leakage path, the mounting ring seat, which abuts against the inner end of the mounting end cap, effectively intercepts the hydrogen. This effectively reduces the amount of contact between the second-level seal and hydrogen during the time the top ring blocking unit extends and completely blocks the hydrogen leakage path, greatly reducing the damage of hydrogen embrittlement to the second-level seal, thus helping to extend its service life and improve its sealing stability.

[0021] 5. Due to the small molecular diameter and strong diffusivity of hydrogen, when the first-level sealing structure fails due to the combined effects of hydrogen embrittlement and mechanical stress, before the top ring blocking unit extends and completely blocks the hydrogen leakage path, wear occurs between the end of the mounting ring seat and the end of the mounting end cap's inner cavity under mechanical stress such as vibration. This causes some hydrogen to pass through the gap between the end of the mounting ring seat and the end of the mounting end cap's inner cavity and come into contact with the second-level seal. Subsequently, as the gas cylinder component extends synchronously with the ring seat component in the top ring blocking unit, it actively absorbs the hydrogen between the inner cavity end and the second-level sealing structure through a one-way channel. This effectively reduces the amount of hydrogen contacted by the second-level seal during the time the top ring blocking unit extends and completely blocks the hydrogen leakage path. This effectively reduces the impact of the first-level seal failure on the layered sealing structure, greatly delays the hydrogen embrittlement process of the subsequent sealing structure, extends the service life of the sealing structure, and greatly improves the stability and safety of the seal during hydrogen transportation.

[0022] 6. The gas cylinder fitting fitted around the end of the annular containment seat provides isolation and protection for the annular containment seat when the top annular containment unit is fully extended and contains hydrogen. Furthermore, the annular bellows cover actively absorbs hydrogen into its interior, and the hydrogen absorption section effectively adsorbs the hydrogen collected inside the gas cylinder fitting. This significantly reduces the degree of hydrogen embrittlement damage caused by the hydrogen inside the gas cylinder fitting to the annular bellows cover and the annular containment seat. This effectively extends the physical isolation time of the top annular containment unit, further delaying the hydrogen embrittlement process of subsequent sealing structures and further improving the stability and safety of the seal during hydrogen transportation.

[0023] 7. When this metal hose is used for a long time, and when the second-level sealing structure fails due to hydrogen embrittlement or other reasons, as the gas pressure in the space between the second-level and third-level sealing structures gradually increases and drives the rear sealing plug to move, when the driven metal spring that moves synchronously with the rear sealing plug contacts the fixed excitation plate, the trigger control circuit board is triggered to control the wireless transmission module to send an alarm signal to the main controller of the external environment, reminding relevant personnel to replace the socket assembly in a timely manner to ensure the stability and safety of the seal during hydrogen transportation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the hydrogen energy delivery metal hose with a multi-layer strong sealing structure disclosed in Embodiment 1 of the present invention.

[0025] Figure 2 This is a side view of the hydrogen energy delivery metal hose with a multi-layer strong sealing structure disclosed in Embodiment 1 of the present invention.

[0026] Figure 3For the present invention Figure 2 A magnified view of part A in the diagram.

[0027] Figure 4 This is a schematic diagram of the overall structure of the side support structure in the hydrogen energy delivery metal hose with a multi-layer strong sealing structure disclosed in Embodiment 2 of the present invention.

[0028] Figure 5 This is a side view of the indicator in the hydrogen energy delivery metal hose with a multi-layer strong sealing structure disclosed in Embodiment 2 of the present invention.

[0029] Figure 6 This is a partial cross-sectional view of the connecting part in this invention.

[0030] Figure 7 This is a partially enlarged cross-sectional view of the mounting ring seat in this invention.

[0031] Figure 8 For the present invention Figure 7 A magnified view of part B in the diagram.

[0032] Figure 9 For the present invention Figure 7 A magnified view of part C in the diagram.

[0033] Figure 10 For the present invention Figure 8 A magnified view of part D in the middle.

[0034] Figure 11 For the present invention Figure 10 A magnified view of part E in the middle.

[0035] Figure 12 For the present invention Figure 8 A magnified view of part F in the middle section.

[0036] Explanation of the labels in the diagram: 201. Metal flexible hose body; 202. Mounting ring seat; 204. Second sealing ring; 205. Third sealing ring; 206. First sealing ring; 208. Rear sealing plug; 209. Front sealing plug; 210. Control circuit board; 211. Wireless transmission module; 212. Annular containment seat; 213. Annular bellows cover; 214. Hydrogen absorption pipeline; 215. Rear insulating sleeve seat; 216. Front sleeve seat 217. Driven metal spring; 218. Fixed excitation plate; 219. Insulating moving rod; 220. Liquid water medium section; 221. Reaction medium section; 222. Barrier membrane; 223. First waterproof and breathable membrane; 224. Passive insertion pin; 225. Wedge-shaped locking block; 226. Annular wedge-shaped locking groove; 227. Mounting end cap; 228. Connecting flange; 229. Second waterproof and breathable membrane; 230. Hydrogen absorption section. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, 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 invention 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 invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly 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 invention according to the specific circumstances.

[0040] Example 1, refer to Figures 1 to 12 This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure, including a metal hose body 201. One end of the metal hose body 201 is provided with an interface component, and the other end is provided with a socket component. The socket component at the end of one hydrogen energy delivery metal hose can be detachably and fixedly installed inside the interface component at the end of another hydrogen energy delivery metal hose. The socket assembly includes a mounting ring seat 202. A first sealing ring 206 is provided on the inner ring wall of the mounting ring seat 202, and a second sealing ring 204 and a third sealing ring 205 arranged vertically on the outer ring wall. Several differential pressure sensing units are provided on the side wall of the mounting ring seat 202 between the second sealing ring 204 and the third sealing ring 205. A top ring blocking unit is provided on the top of the mounting ring seat 202. The top ring containment unit includes a retractable ring seat that is connected to the inner cavity of the differential pressure sensing unit, and an air cylinder is sleeved at the end of the ring seat. The air cylinder assembly includes a one-way channel that allows air to enter the air cylinder assembly in one direction as the air cylinder assembly extends synchronously with the gradually extending ring seat assembly, and the air inlet of the one-way channel is located above the second sealing ring 204. The differential pressure sensing unit includes a plug structure, and when the plug structure changes from an initial static state to an active state, it can force the gas in the differential pressure sensing unit into the ring seat and drive the ring seat to extend. The gas in the differential pressure sensing unit is preferably air.

[0041] This metal hose enables multi-level sealing of the hydrogen it transports. During hydrogen transport, when the first-level sealing structure (i.e., the first sealing ring 206) fails due to the combined effects of hydrogen embrittlement and mechanical stress, it is blocked by the second-level sealing structure (i.e., the second sealing ring 204). As the gas pressure in the space between the first and second-level sealing structures gradually increases and drives the front sealing plug 209 to move, the moving front sealing plug 209 continuously injects gas into the annular groove, thereby triggering the top ring blocking unit to extend and forcibly physically isolate the hydrogen from the second-level sealing structure (i.e., the second sealing ring 204). This active isolation mechanism can effectively reduce the amount of hydrogen that comes into contact with the second-level sealing structure, thereby effectively preventing the second-level sealing structure from aging due to hydrogen embrittlement caused by long-term exposure to a high-concentration hydrogen environment. This helps to extend the overall service life of the sealing structure in the metal hose and improve the sealing performance during hydrogen transport.

[0042] Reference Figures 1 to 7 This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure, and the interface assembly includes an installation end cap 227 connected to the end of the metal hose body 201. Several differential pressure sensing units are arranged in a circular array.

[0043] When the first-level sealing structure fails due to the combined effects of hydrogen embrittlement and mechanical stress, and before the top ring blocking unit extends and completely blocks the hydrogen leakage path, the mounting ring seat 202, which abuts against the inner end of the mounting end cap 227, effectively intercepts the hydrogen. This effectively reduces the amount of contact between the second-level seal and hydrogen during the time the top ring blocking unit extends and completely blocks the hydrogen leakage path, greatly reducing the damage to the second-level seal caused by hydrogen embrittlement, thus helping to extend its service life and improve its sealing stability.

[0044] Reference Figures 6 to 8 , Figure 10 , Figure 11 This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The plug structure includes a front sealing plug 209, and a front cylinder seat 216 is provided on one side of the front sealing plug 209. The front cylindrical base 216 is provided with a liquid chamber and a connecting chamber, and the liquid chamber and the connecting chamber are interconnected. A diaphragm 222 is connected to the end of the connecting cavity and the liquid cavity, and the diaphragm 222 is sealed at the outlet of the liquid cavity. The liquid cavity is filled with a liquid water medium 220, and a reaction medium 221 is provided in the connecting cavity. The reaction medium 221 is a block structure made of effervescent disintegrant. A reserved opening is provided on the side wall of the front cylindrical seat 216 at the position corresponding to the connection cavity, and a first waterproof and breathable membrane 223 is connected inside the reserved opening; The front socket 216 has an insertion hole at one end near the connecting cavity. A passive pin 224 is slidably inserted into the insertion hole. The pointed end of the passive pin 224 extends into the connecting cavity and faces the diaphragm 222. A first spring is sleeved around the passive insertion pin 224, and one end of the first spring is connected to the end of the front socket 216, while the other end is connected to the front sealing plug 209. A recessed groove is provided on the side wall of the socket. A wedge-shaped block 225 is slidably inserted in the recessed groove. A second spring is also provided in the recessed groove. One end of the second spring is connected to the end of the recessed groove, and the other end is connected to the end of the wedge-shaped block 225 that extends into the recessed groove. The passive insert 224 has multiple annular wedge-shaped grooves 226 evenly distributed on its sidewall, which are adapted to the wedge-shaped ends of the wedge-shaped locking block 225. The cross-sectional shape of the wedge-shaped ends of the wedge-shaped locking block 225 is shown in the attached figure. Figure 11 The diagram shows a right-angled triangle.

[0045] Reference Figures 6 to 8 The present invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The differential pressure sensing unit also includes a column groove disposed on the side wall of the mounting ring seat 202 and between the second sealing ring 204 and the third sealing ring 205. A partition is detachably sealed in the column groove. The front sealing plug 209 slides inside the column groove, and the end of the front cylinder seat 216 away from the connecting cavity is connected to the partition.

[0046] Reference Figures 6 to 8 , Figure 12 The present invention provides a hydrogen energy transmission metal hose with a multi-layer strong sealing structure. The ring seat includes an annular groove disposed on the top of the mounting ring seat 202 and connected to the column groove. The annular containment seat 212 is slidably inserted into the annular groove; The annular groove is also equipped with a third spring, one end of which is connected to the end of the annular blocking seat 212 that extends into the annular groove, and the other end is connected to the bottom wall of the annular groove.

[0047] When the first-level sealing structure (i.e., the first sealing ring 206) fails under the combined effects of hydrogen embrittlement and mechanical stress, the air pressure between the part where the mounting ring seat 202 abuts against the end of the mounting end cap 227 and the first sealing ring 206 gradually increases. This pushes the front sealing plug 209 to move. When the front sealing plug 209 moves under the pressure, the moving front sealing plug 209 drives the passive insert 224 to puncture the diaphragm 222, causing the liquid water medium 220 to overflow into the connecting cavity and react with the reaction medium 221. A large amount of gas is rapidly released into the annular groove, accelerating the extension speed of the top ring blocking unit and shortening the physical isolation time of the top ring blocking unit. This effectively reduces the amount of hydrogen leaked through the hydrogen leakage path between the end of the mounting end cap 227 and the end of the mounting ring seat 202 when the first-level sealing structure fails. This reduces the amount of hydrogen contact between the second-level seal and the second-level seal, while also increasing the gas pressure in the annular groove and further pressing the end of the top ring blocking unit against the end of the mounting end cap 227, thus increasing the sealing effect of the physical isolation of the top ring blocking unit.

[0048] As the active passive pin 224 continuously extends into the inner cavity of the front cylinder seat 216 and punctures the diaphragm 222, the wedge-shaped end of the wedge-shaped block 225 continuously engages with the annular wedge-shaped grooves 226 at different positions on the side wall of the passive pin 224. When the liquid water medium 220 overflows into the connecting cavity and reacts with the reaction medium 221, rapidly releasing a large amount of gas and increasing the gas pressure in the column groove, the wedge-shaped end of the wedge-shaped block 225, which is engaged with the annular wedge-shaped groove 226, restricts the front sealing plug 209 connected to the end of the passive pin 224 from moving in the opposite direction under the action of gas pressure. This effectively prevents the gas pressure in the annular groove from being affected by the reverse movement of the front sealing plug 209 when gas has been injected into the annular groove, thus affecting the extension speed of the top ring blocking unit. This ensures that the physical isolation time of the top ring blocking unit is not affected, thereby ensuring the sealing isolation effect of the physical isolation of the top ring blocking unit.

[0049] Reference Figure 8 and Figure 12This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The gas cylinder also includes an annular bellows cover 213 that is sleeved and fixed to the outside of the top of the annular enclosure seat 212. The annular bellows cover 213 is also provided with a hydrogen absorption part 230 for absorbing hydrogen. The hydrogen absorption part 230 is preferably a hydrogen absorption sheet, and the hydrogen absorption sheet is connected to the inner wall of the annular bellows cover 213. The hydrogen absorption sheet is a hydrogen absorption material made of titanium alloy as the base material. The hydrogen absorption material is characterized by a large hydrogen absorption capacity, which can effectively absorb and store the hydrogen continuously released in the sealed cavity of the device and component. Its hydrogen absorption principle is: the hydrogen absorption sheet reacts with gaseous hydrogen to form a metal hydride. A large amount of hydrogen is stored in the hydrogen storage material in the form of solid metal hydride through this reaction. Of course, the hydrogen absorption section 230 can also be a common hydrogen adsorption material that is installed inside the annular bellows cover 213. Such hydrogen adsorption materials can adsorb a large amount of hydrogen due to their multiple micropores and high specific surface area. Common hydrogen adsorption materials include zeolite, activated carbon, carbon nanofibers, carbon nanotubes, etc., which will not be described in detail here.

[0050] The top of the mounting ring seat 202 is provided with an extended annular groove corresponding to the position of the annular groove to accommodate the annular accordion cover 213. The top wall of the inner cavity of the annular accordion cover 213 is connected to the top of the annular blocking seat 212, and the bottom of the annular accordion cover 213 is connected to the bottom wall of the extended annular groove.

[0051] Reference Figures 6 to 8 This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The one-way channel includes a hydrogen absorption pipe 214, and a one-way air inlet valve is provided on the hydrogen absorption pipe 214. One end of the hydrogen absorption pipe 214 is fixedly connected to the bottom end of the annular bellows cover 213, and the other end passes through the inside of the mounting ring seat 202 and through the side wall of the mounting ring seat 202. The end of the mounting ring seat 202 away from the annular bellows cover 213 is a one-way air inlet.

[0052] Due to the small molecular diameter and strong diffusivity of hydrogen, when the first-level sealing structure fails due to the combined effects of hydrogen embrittlement and mechanical stress, before the top ring blocking unit extends and completely blocks the hydrogen leakage path, wear occurs between the end of the mounting ring seat 202 and the end of the inner cavity of the mounting end cover 227 under mechanical stress such as vibration. This causes some hydrogen to pass through the gap between the end of the mounting ring seat 202 and the end of the inner cavity of the mounting end cover 227 and come into contact with the second-level seal. Subsequently, as the gas cylinder component extends synchronously with the ring seat component in the top ring blocking unit, it actively absorbs the hydrogen between the end of the inner cavity of 227 and the second-level sealing structure through a one-way channel. This effectively reduces the amount of hydrogen contacted by the second-level seal during the time the top ring blocking unit extends and completely blocks the hydrogen leakage path. This effectively reduces the impact of the first-level seal failure on the layered sealing structure, greatly delays the hydrogen embrittlement process of the subsequent sealing structure, extends the service life of the sealing structure, and greatly improves the stability and safety of the seal during hydrogen transportation.

[0053] The gas cylinder fitting sleeved on the outer end of the annular containment seat 212 isolates and protects the annular containment seat 212 when the top annular containment unit is fully extended and contains hydrogen. After the annular bellows cover 213 actively absorbs hydrogen into its interior, the hydrogen absorption part 230 can effectively adsorb the hydrogen collected inside the gas cylinder fitting, greatly reducing the degree of "hydrogen embrittlement" damage caused by hydrogen in the gas cylinder fitting to the annular bellows cover 213 and the annular containment seat 212. This can effectively extend the physical isolation time of the top annular containment unit, help to further delay the hydrogen embrittlement process of the subsequent sealing structure, and further improve the stability and safety of the seal during hydrogen transportation.

[0054] Example 2, the difference between this example and Example 1 is: (Refer to...) Figures 1 to 3 This invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The mounting ring seat 202 in the socket assembly at the end of one hydrogen energy delivery metal hose is threaded to the interior of the mounting end cap 227 in the interface assembly at the end of another hydrogen energy delivery metal hose.

[0055] The mounting ring seat 202 in the socket assembly at the end of one hydrogen energy delivery metal hose is fixedly installed to the inside of the mounting end cap 227 in the interface assembly at the end of another hydrogen energy delivery metal hose via a detachable installation method using a threaded connection. This facilitates the operator's assembly of the metal hose. After the metal hose is put into use, when the first-level sealing structure (i.e., the first sealing ring 206) fails under the combined effects of hydrogen embrittlement and mechanical stress, and the top ring blocking unit extends and physically isolates the hydrogen from other levels of sealing structure, the liquid water medium 220 overflows into the connection cavity and reacts with the reaction medium 221, rapidly releasing a large amount of gas into the injection ring. Within the annular groove, the greater air pressure within the groove pushes the end of the top ring blocking unit to press against the end of the mounting end cap 227's inner cavity. This further increases the friction between the thread and the thread groove in the threaded connection, increasing the frictional force required to overcome when the connection loosens. Consequently, it further enhances the connection strength at the metal hose joint when the first-level sealing structure fails, effectively preventing the hose joint from loosening due to mechanical stress after the first-level sealing structure fails during hydrogen transport. This loosening of the hose joint would then affect the sealing performance of the metal hose during hydrogen transport, thus further enhancing the sealing stability of the metal hose during hydrogen transport.

[0056] Example 3 differs from Examples 1 and 2 in that: (Refer to...) Figure 4 and Figure 5 This invention provides a hydrogen energy transmission metal hose with a multi-layer strong sealing structure. Both the end cap 227 and the end of the mounting ring seat 202 are connected to a connecting flange 228. The connecting flange 228 connected to the end of the mounting ring seat 202 in the socket assembly of one hydrogen energy transmission metal hose and the connecting flange 228 connected to the end of the end cap 227 in the interface assembly of another hydrogen energy transmission metal hose are fixedly connected by bolts.

[0057] The mounting ring seat 202 in the socket assembly at the end of one hydrogen energy transmission metal hose is fixed to the inside of the mounting end cap 227 in the interface assembly at the end of another hydrogen energy transmission metal hose using a detachable installation method via bolt connection. This facilitates the operator's assembly of the metal hose. After the metal hose is put into use, when the first-level sealing structure (i.e., the first sealing ring 206) fails under the combined effects of hydrogen embrittlement and mechanical stress, and the top ring blocking unit extends and physically isolates the hydrogen from other levels of sealing structure, the liquid water medium 220 overflows into the connection cavity and reacts with the reaction medium 221, rapidly releasing a large amount of gas into the annular groove. The greater air pressure within the annular groove pushes the end of the top ring blocking unit to apply pressure to the end of the inner cavity of the mounting end cover 227. This further increases the friction between the thread on the stud in the bolt and the groove in the nut in the bolted connection. This further increases the friction force that needs to be overcome when the connection loosens. As a result, the connection strength at the joint of the metal hose can be further enhanced when the first-level sealing structure fails. This effectively prevents the joint from loosening due to mechanical stress after the first-level sealing structure fails during hydrogen transportation, thus affecting the sealing performance of the metal hose during hydrogen transportation. This further helps to enhance the sealing stability of the metal hose during hydrogen transportation.

[0058] Example 4 differs from Examples 1, 2, and 3 in that, referring to... Figures 6 to 8 , Figure 10 The present invention provides a hydrogen energy delivery metal hose with a multi-layer strong sealing structure. The differential pressure sensing unit further includes a rear sealing plug 208, a control circuit board 210, a pressure relief channel, and a second waterproof and breathable membrane 229. The rear sealing plug 208 slides within the column groove, and the rear sealing plug 208 and the front sealing plug 209 are located on the left and right sides of the partition, respectively. A rear insulating cylinder seat 215 is provided on one side of the rear sealing plug 208; An insulating rod 219 is slidably inserted into the end of the rear insulating cylinder seat 215. A fourth spring is sleeved on the outer periphery of the insulating rod 219. One end of the fourth spring is connected to the end of the rear insulating cylinder seat 215, and the other end is connected to the rear sealing plug 208. A driven metal spring 217 is connected to one end of the insulating rod 219 that extends into the inner cavity of the rear insulating cylinder seat 215. A fixed excitation piece 218 is connected to the inner wall of the rear insulating cylinder seat 215, and the surface of the side wall of the fixed excitation piece 218 is flush with the surface of the inner wall of the rear insulating cylinder seat 215. The end of the rear insulating cylinder seat 215 away from the insulating moving rod 219 is connected to the partition plate, and the end of the insulating moving rod 219 away from the rear insulating cylinder seat 215 is connected to the rear sealing plug 208. The control circuit board 210 is equipped with a wireless transmission module 211, and the control circuit board 210 is fixedly installed on the partition. The control circuit board 210 is pre-installed with a battery, and the battery pre-installed on the control circuit board 210 supplies power to the control circuit board 210 and the wireless transmission module 211. When the fourth spring is in the initial relaxed state, the free end of the driven metal spring 217 elastically abuts against the inner wall surface of the rear insulating cylinder seat 215, and at this time, the driven metal spring 217 and the fixed excitation piece 218 do not contact each other. The pressure relief channel is set inside the mounting ring seat 202. One end of the pressure relief channel is connected to the column groove, and the end of the pressure relief channel connected to the column groove corresponds to the position of the rear insulating cylinder seat 215. The other end of the pressure relief channel passes through the end of the mounting ring seat 202. The second waterproof and breathable membrane 229 is located at the end of the pressure relief channel away from the column groove and is connected to the end of the mounting ring seat 202. When the rear sealing plug 208 moves, the pressure relief channel is used for exhaust treatment. The hydrogen absorption pipeline 214 ensures that the outlet of the pressure relief channel is ventilated while effectively preventing external impurities from entering the exhaust channel, thus ensuring the smooth flow of the exhaust channel.

[0059] Both the driven metal spring 217 and the fixed excitation contact 218 are electrically connected to the control circuit board 210. When the driven metal spring 217 contacts the fixed excitation contact 218, the control circuit board 210 is triggered to control the wireless transmission module 211 to send an alarm signal to the outside world.

[0060] When this metal hose is used for a long time, and when the second-level sealing structure fails due to hydrogen embrittlement or other reasons, the gas pressure in the space between the second and third-level sealing structures gradually increases, driving the rear sealing plug 208 to move. When the driven metal spring 217, which moves synchronously with the rear sealing plug 208, contacts the fixed trigger contact 218, the trigger control circuit board 210 controls the wireless transmission module 211 to send an alarm signal to the external main controller, reminding relevant personnel to replace the socket assembly in a timely manner to ensure the stability and safety of the seal during hydrogen transportation. The main controller mentioned in this article refers to existing technologies such as computers that commonly perform control functions, which will not be elaborated upon here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A hydrogen energy delivery metal hose with a multi-layer strong sealing structure, characterized in that: The device includes a metal hose body (201), one end of which is provided with an interface assembly and the other end with a socket assembly. The socket assembly on the end of one hydrogen energy transport metal hose can be detachably and fixedly installed inside the interface assembly on the end of another hydrogen energy transport metal hose. The socket assembly includes a mounting ring seat (202). The inner ring wall of the mounting ring seat (202) is provided with a first sealing ring (206), and the outer ring wall is provided with a second sealing ring (204) and a third sealing ring (205) arranged in an upward and downward manner, respectively. The side wall of the mounting ring seat (202) is provided with a plurality of differential pressure sensing units between the second sealing ring (204) and the third sealing ring (205). The top of the mounting ring seat (202) is provided with a top ring blocking unit. The top ring containment unit includes a retractable ring seat that is connected to the inner cavity of the differential pressure sensing unit, and an air cylinder is sleeved on the end of the ring seat. The air cylinder assembly includes a one-way channel that allows air to enter the air cylinder assembly in one direction when the air cylinder assembly extends synchronously with the gradually extending ring seat assembly, and the air inlet of the one-way channel is located above the second sealing ring (204). The differential pressure sensing unit includes a plug structure, and when the plug structure changes from an initial static state to an active state, it can force the gas in the differential pressure sensing unit into the ring seat and drive the ring seat to extend.

2. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 1, characterized in that: The interface assembly includes a mounting end cap (227) connected to the end of the metal flexible tube body (201). Several of the differential pressure sensing units are arranged in a circular array.

3. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 1, characterized in that: The plug structure includes a front sealing plug (209), and a front cylinder seat (216) is provided on one side of the front sealing plug (209). The front cylindrical seat (216) is provided with a liquid cavity and a connecting cavity, and the liquid cavity and the connecting cavity are interconnected. A diaphragm (222) is connected to the end of the connecting cavity and the liquid cavity, and the diaphragm (222) is sealed at the outlet of the liquid cavity. The liquid cavity is filled with a liquid water medium (220), and a reaction medium (221) is provided in the connecting cavity. A reserved opening is provided on the side wall of the front tube seat (216) at the position corresponding to the connection cavity, and a first waterproof and breathable membrane (223) is connected in the reserved opening. The front socket (216) has an insertion hole at one end near the connecting cavity. A passive insertion pin (224) is inserted into the insertion hole in a sealed and sliding manner. The pointed end of the passive insertion pin (224) extends into the connecting cavity and faces the diaphragm (222). A first spring is sleeved on the outer periphery of the passive insert (224), and one end of the first spring is connected to the end of the front sleeve (216), while the other end is connected to the front sealing plug (209); A recessed groove is provided on the side wall of the socket. A wedge-shaped block (225) is slidably inserted in the recessed groove. A second spring is also provided in the recessed groove. One end of the second spring is connected to the end of the recessed groove, and the other end is connected to the end of the wedge-shaped block (225) that extends into the recessed groove. The passive insert (224) has multiple annular wedge-shaped slots (226) that are adapted to the wedge-shaped ends of the wedge-shaped block (225) evenly distributed on its side wall.

4. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 3, characterized in that: The differential pressure sensing unit also includes a column groove disposed on the side wall of the mounting ring seat (202) and between the second sealing ring (204) and the third sealing ring (205), and a partition is detachably sealed in the column groove; The front sealing plug (209) slides inside the column groove, and the end of the front cylinder seat (216) away from the connecting cavity is connected to the partition.

5. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 4, characterized in that: The ring seat includes an annular groove disposed on the top of the mounting ring seat (202) and connected to the column groove; The annular groove is internally sealed and slidably inserted with an annular blocking seat (212). The annular groove is also equipped with a third spring, one end of which is connected to the end of the annular blocking seat (212) that extends into the annular groove, and the other end is connected to the bottom wall of the annular groove.

6. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 5, characterized in that: The gas cylinder also includes an annular bellows cover (213) that is sleeved and fixed to the outside of the top of the annular blocking seat (212). The annular bellows cover (213) is also provided with a hydrogen absorption part (230) for absorbing hydrogen. The top of the mounting ring seat (202) is provided with an extended annular groove corresponding to the position of the annular groove to accommodate the annular bellows cover (213), and the top wall of the inner cavity of the annular bellows cover (213) is connected to the top of the annular blocking seat (212), while the bottom of the annular bellows cover (213) is connected to the bottom wall of the extended annular groove. The one-way channel includes a hydrogen absorption line (214), and a one-way air inlet valve is provided on the hydrogen absorption line (214); One end of the hydrogen absorption pipeline (214) is fixedly connected to the bottom end of the annular bellows cover (213), and the other end passes through the inside of the mounting ring seat (202) and through the side wall of the mounting ring seat (202). The end of the mounting ring seat (202) away from the annular bellows cover (213) is a one-way air inlet.

7. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 4, characterized in that: The differential pressure sensing unit further includes a rear sealing plug (208), a control circuit board (210), a pressure relief channel, and a second waterproof and breathable membrane (229). The rear sealing plug (208) slides within the column groove, and the rear sealing plug (208) and the front sealing plug (209) are located on the left and right sides of the partition, respectively. A rear insulating cylinder seat (215) is provided on one side of the rear sealing plug (208). An insulating rod (219) is slidably inserted into the end of the rear insulating cylinder seat (215). A fourth spring is sleeved on the outer periphery of the insulating rod (219), and one end of the fourth spring is connected to the end of the rear insulating cylinder seat (215), while the other end is connected to the rear sealing plug (208). The end of the insulating rod (219) that extends into the inner cavity of the rear insulating cylinder seat (215) is connected to a driven metal spring (217). A fixed excitation plate (218) is connected to the inner wall of the rear insulating cylinder seat (215), and the surface of the side wall of the fixed excitation plate (218) is flush with the surface of the inner wall of the rear insulating cylinder seat (215). The end of the rear insulating cylinder seat (215) away from the insulating moving rod (219) is connected to the partition plate, and the end of the insulating moving rod (219) away from the rear insulating cylinder seat (215) is connected to the rear sealing plug (208); The control circuit board (210) is provided with a wireless transmission module (211), and the control circuit board (210) is fixedly installed on the partition. When the fourth spring is in the initial relaxed state, the free end of the driven metal spring (217) elastically abuts against the inner wall surface of the rear insulating cylinder seat (215), and at this time, the driven metal spring (217) and the fixed excitation piece (218) do not contact each other. The pressure relief channel is set inside the mounting ring seat (202). One end of the pressure relief channel is connected to the column groove, and the end of the pressure relief channel connected to the column groove corresponds to the position of the rear insulating cylinder seat (215). The other end of the pressure relief channel passes through the end of the mounting ring seat (202). The second waterproof and breathable membrane (229) is located at the end of the pressure relief channel away from the column groove and is connected to the end of the mounting ring seat (202).

8. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 7, characterized in that: Both the driven metal spring (217) and the fixed excitation piece (218) are electrically connected to the control circuit board (210). When the driven metal spring (217) and the fixed excitation piece (218) come into contact, the control circuit board (210) is triggered to control the wireless transmission module (211) to send out an alarm signal.

9. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 2, characterized in that: The mounting ring (202) in the end socket assembly of one of the hydrogen delivery metal hoses is threaded to the interior of the end cap (227) in the interface assembly of the other hydrogen delivery metal hose.

10. The hydrogen energy transmission metal hose with a multi-layer strong sealing structure according to claim 2, characterized in that: The mounting end cap (227) and the mounting ring seat (202) are both connected to a connecting flange (228), and the connecting flange (228) connected to the end of the mounting ring seat (202) in the end socket assembly of one hydrogen energy transmission metal hose is fixedly connected to the connecting flange (228) connected to the end of the mounting end cap (227) in the interface assembly of the other hydrogen energy transmission metal hose by bolts.

Images