Composite hose structure for gas delivery

Abstract

The application discloses a composite hose structure for gas delivery, and relates to the technical field of gas delivery and distribution equipment, comprising a double-mode speed sealing assembly, wherein FBG sensors, phase-sensitive optical time domain reflectometers and carbon tube composite filaments are used to form double-mode monitoring, the FBG sensors can capture the slight strain of the reinforced fiber layer in real time, the phase-sensitive optical time domain reflectometers capture stress waves generated by internal crack propagation of the material through wideband acoustic detection, early identification of millimeter-level damage in the pipe is realized, the continuity of the grid woven by the carbon tube composite filaments is monitored in real time through alternating current impedance measurement, when the fracture of the reinforced fiber layer causes the local grid resistance to increase, the micro-damage area can be accurately located, when leakage occurs, the memory alloy spring receives the electric signal of the double-mode monitoring, generates axial thrust to push the outer side of the fluororubber sealing ring, the fluororubber sealing ring expands along the radial direction under the thrust of the memory alloy spring, and fast and effective mechanical hard sealing is realized.

Description

Technical Field

[0001] This invention relates to the field of gas transmission and distribution equipment technology, specifically to a composite hose structure for gas transmission. Background Technology

[0002] Composite hoses for gas transmission are flexible pipelines specifically designed for transporting natural gas, liquefied petroleum gas, and other fuel gases. Their core feature is the use of a multi-layered composite structure made of different materials. Through the complementary properties of the materials, they meet the requirements for safety, durability, and ease of use in gas transmission.

[0003] Traditional gas delivery hoses typically rely on a single sensor such as a pressure switch. This single detection method can only detect macroscopic changes after a leak occurs and cannot capture micro-damage inside the pipe, resulting in a certain monitoring blind spot. Furthermore, this single detection method is susceptible to environmental interference such as temperature and electromagnetic interference, which can lead to false alarms. When a leak occurs, it lacks the ability to actively seal it, relying on external shut-off valves or manual intervention to shut it off. This results in a delayed response to leak shut-off, making it difficult to handle emergencies such as high-pressure gas leaks in a very short time. Summary of the Invention

[0004] The purpose of this invention is to provide a composite hose structure for gas transmission, including a dual-mode quick-sealing assembly. First, a dual-mode monitoring system is formed using an FBG sensor, a phase-sensitive optical time-domain reflectometer, and carbon nanotube composite filaments. The FBG sensor can capture minute strains in the reinforcing fiber layer in real time. The phase-sensitive optical time-domain reflectometer uses broadband acoustic wave detection to capture stress waves generated by the propagation of internal cracks in the material, enabling early identification of millimeter-level damage inside the tank. The grid woven from carbon nanotube composite filaments is used to monitor the continuity of the grid in real time through AC impedance measurement. When the fracture of the reinforcing fiber layer causes a local increase in grid resistance, the micro-damage area can be accurately located.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite hose structure for gas transmission, comprising a dual-mode quick-seal assembly, a spiral sheath assembly, and an equipment connector, wherein the bottom of the equipment connector is respectively provided with the dual-mode quick-seal assembly and the spiral sheath assembly, and the dual-mode quick-seal assembly is installed between the inner surfaces of the spiral sheath assembly.

[0006] The dual-mode rapid sealing assembly includes a set of FBG sensors, a set of phase-sensitive optical time-domain reflectometers, and a set of carbon nanotube composite filaments. The FBG sensors are used to provide high-resolution point-based physical quantity data, the phase-sensitive optical time-domain reflectometers are used to capture overall state changes along the line, and the carbon nanotube composite filaments are composed of carbon nanotubes and TPU composite filaments. The carbon nanotube composite filaments are used to enhance the structural strength and toughness of the hose and provide a continuous conductive path.

[0007] The spiral protective layer assembly includes two magnetic snap rings and a spiral armor layer. The two magnetic snap rings are used to provide magnetic attraction, and the spiral armor layer is used to enhance the mechanical strength and impact resistance of the overall structure.

[0008] Preferably, the dual-mode fast sealing assembly further includes an inner layer made of fluororubber or nitrile rubber. The outer surface of the inner layer is covered with a middle layer made of high-strength polyester fiber. A set of single-mode optical fibers runs through the interior of the middle layer, and a set of FBG sensors is integrated inside the set of single-mode optical fibers.

[0009] Preferably, a set of phase-sensitive optical time-domain reflectometers and a set of carbon nanotube composite filaments both penetrate the interior of the middle layer, and the set of phase-sensitive optical time-domain reflectometers are distributed along the circumference of the interior of the middle layer.

[0010] Preferably, a set of microelectrodes is integrated on the outer surface of a set of carbon nanotube composite filaments, and the set of microelectrodes is used for monitoring electrical signals. The top of the inner layer is connected to a metal connector, and an annular groove is formed on the top of the inner wall of the metal connector.

[0011] Preferably, a set of shape memory alloy springs is embedded between the inner surfaces of the annular groove, the set of shape memory alloy springs is used to provide adaptive support and cushioning, and a fluororubber sealing ring is connected to the bottom of the inner wall of the annular groove.

[0012] Preferably, the fluororubber sealing ring is used to prevent leakage of gas that may be transmitted inside the hose, and one end of a set of shape memory alloy springs is connected to the outer surface of the fluororubber sealing ring. The inner surface of the fluororubber sealing ring is connected with an expanded graphite sheet to provide elastic deformation, and the inner surfaces of the metal joint are connected to the equipment joint bolts.

[0013] Preferably, an accelerometer is fixedly installed on the outer surface of the metal connector, and a control box is installed on the outer surface of the metal connector. An optical fiber signal conditioning module, a conductive network impedance measurement module, a communication module, and an edge processor are respectively installed on one side of the inner wall of the control box. An indicator light and a buzzer are respectively provided on one side of the outer wall of the control box.

[0014] Preferably, the spiral sheath assembly further includes an outer sheath, and the inner surface of the outer sheath is connected to the outer surface of the middle layer.

[0015] Preferably, the outer surface of the outer sheath adopts a hexagonal protrusion structure, and a group of hexagonal protrusion units independently encapsulate a shear-thickening liquid composed of nano-silica and polyethylene glycol carrier liquid. The outer surface of a group of hexagonal protrusion units is connected to a PVDF piezoelectric film for real-time monitoring of external impacts.

[0016] Preferably, the outer surface of the outer sheath is connected to a magnetic mesh, the outer surface of the magnetic mesh is magnetically connected to one of the magnetic buckle rings, each of the magnetic buckle rings has a groove on one side of its outer wall, and the two grooves are embedded and connected to the two ends of the outer wall of the spiral armor layer. There is a ring of movable gap between the inner surface of the spiral armor layer and the outer surface of the outer sheath.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: In this invention, by setting up a dual-mode rapid sealing assembly, a dual-mode monitoring system is first constructed using an FBG sensor, a phase-sensitive optical time-domain reflectometer, and carbon nanotube composite filaments. The FBG sensor can capture minute strains in the reinforcing fiber layer in real time. The phase-sensitive optical time-domain reflectometer uses broadband acoustic wave detection to capture stress waves generated by crack propagation within the material, achieving early identification of millimeter-level damage inside the tube. A mesh woven from carbon nanotube composite filaments is used to monitor the continuity of the mesh in real time through AC impedance measurement. When the fracture of the reinforcing fiber layer causes a local increase in mesh resistance, accurate detection can be achieved. The system accurately locates the micro-damage area. When a leak occurs, the shape memory alloy spring receives an electrical signal from the dual-mode monitoring system, causing it to return to its free length. This generates an axial thrust that pushes the outer side of the fluororubber sealing ring. Under the thrust of the shape memory alloy spring, the fluororubber sealing ring expands radially, achieving a rapid and effective mechanical hard seal and initially blocking the flow of gas. Because the trace amounts of water vapor in the gas come into contact with the expanded graphite flakes on the inner side of the sealing ring, the expanded graphite flakes rapidly expand in volume. The expanded graphite can fully fill the micro-gap between the sealing ring and the pipe wall, forming a secondary soft seal, thereby enhancing the reliability of the sealing. Attached Figure Description

[0018] Figure 1 This is a perspective view of the main structure of a composite flexible hose for gas delivery according to the present invention.

[0019] Figure 2 This is a three-dimensional cross-sectional view of a composite flexible hose structure for gas delivery according to the present invention.

[0020] Figure 3 This is a schematic diagram showing the installation positions of the dual-mode quick-sealing assembly and the spiral protective layer assembly in a composite hose structure for gas transmission according to the present invention.

[0021] Figure 4 This is a perspective view of the dual-mode quick-sealing component structure in a composite flexible hose structure for gas transmission according to the present invention;

[0022] Figure 5 This is a schematic diagram showing the installation positions of the metal joint, shape memory alloy spring, and fluororubber sealing ring in a composite hose structure for gas transmission according to the present invention.

[0023] Figure 6This is a schematic diagram showing the installation positions of the fiber optic signal conditioning module, conductive network impedance measurement module, communication module, and edge processor in a composite flexible hose structure for gas delivery according to the present invention.

[0024] Figure 7 for Figure 5 Enlarged 3D view of the structure at point A in the middle;

[0025] Figure 8 for Figure 5 Enlarged 3D view of the structure at point B in the middle;

[0026] Figure 9 This is a perspective view of the spiral sheath assembly in a composite flexible hose structure for gas delivery according to the present invention.

[0027] Figure 10 This is a schematic diagram showing the installation positions of the magnetic mesh, magnetic buckle ring, and spiral armor layer in a composite flexible hose for gas transmission according to the present invention.

[0028] Figure 11 for Figure 10 Enlarged 3D view of the structure at point C.

[0029] In the diagram: 100, Dual-mode quick-sealing assembly; 101, Inner layer; 102, Middle layer; 103, Single-mode optical fiber; 104, FBG sensor; 105, Phase-sensitive optical time-domain reflectometer; 106, Carbon nanotube composite filament; 107, Microelectrode; 108, Metal connector; 109, Shape memory alloy spring; 110, Fluororubber sealing ring; 111, Expanded graphite sheet; 112, Accelerometer; 113, Control box; 114, Fiber optic signal conditioning module; 115, Conductive network impedance measurement module; 116, Communication module; 117, Edge processor; 118, Indicator light; 119, Buzzer; 200, Equipment connector; 300, Spiral sheath assembly; 301, Outer sheath; 302, Piezoelectric film; 303, Magnetic mesh; 304, Magnetic snap ring; 305, Spiral armor layer. Detailed Implementation

[0030] 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, and 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.

[0031] Example 1: This example mainly addresses the issue of traditional gas delivery hoses, which typically rely on a single sensor such as a pressure switch. This single detection method can only detect macroscopic changes after a leak and cannot capture micro-damage inside the pipe, resulting in a certain monitoring blind spot. Furthermore, this single detection method is susceptible to environmental interference such as temperature and electromagnetic interference, leading to false alarms. When a leak occurs, it lacks the ability to actively seal it, relying on external shut-off valves or manual intervention to shut it off, resulting in a delayed response to leak shut-off and making it difficult to handle emergencies such as high-pressure gas leaks in a very short time.

[0032] This embodiment addresses the problems of existing technologies by employing a dual-mode rapid sealing assembly 100. Firstly, it utilizes an FBG sensor 104, a phase-sensitive optical time-domain reflectometer 105, and carbon nanotube composite filaments 106 to form a dual-mode monitoring system. The FBG sensor 104 can capture minute strains in the reinforcing fiber layer in real time. The phase-sensitive optical time-domain reflectometer 105 uses broadband acoustic wave detection to capture stress waves generated by crack propagation within the material, enabling early identification of millimeter-level damage within the tube. The mesh woven from the carbon nanotube composite filaments 106 is monitored in real time using AC impedance measurement to ensure its continuity. When the fracture of the reinforcing fiber layer causes a local increase in mesh resistance, it can accurately detect... The micro-damage area is located. When a leak occurs, the shape memory alloy spring 109 receives the electrical signal from the dual-mode monitoring and causes the shape memory alloy spring 109 to return to its free length, generating an axial thrust to push the outer side of the fluororubber sealing ring 110. Under the thrust of the shape memory alloy spring 109, the fluororubber sealing ring 110 expands radially to achieve a fast and effective mechanical hard seal, initially blocking the flow of gas. Because the trace amount of water vapor contained in the gas comes into contact with the expanded graphite sheet 111 on the inner side of the sealing ring, it causes the expanded graphite sheet 111 to quickly complete its volume expansion. The expanded graphite can fully fill the micro gap between the sealing ring and the pipe wall, forming a secondary soft seal, thereby enhancing the reliability of the sealing.

[0033] In some embodiments, according to Figures 1-8 As shown, the dual-mode fast-sealing assembly 100 includes a set of FBG sensors 104, a set of phase-sensitive optical time-domain reflectometers 105, and a set of carbon nanotube composite filaments 106. The set of FBG sensors 104 is used to provide high-resolution point-type physical quantity data, the set of phase-sensitive optical time-domain reflectometers 105 is used to capture overall state changes along the line, and the set of carbon nanotube composite filaments 106 is composed of carbon nanotubes and TPU composite filaments. The set of carbon nanotube composite filaments 106 is used to enhance the structural strength and toughness of the hose and provide a continuous conductive path.

[0034] The dual-mode fast-sealing assembly 100 also includes an inner layer 101, which is made of fluororubber or nitrile rubber. The outer surface of the inner layer 101 is covered with a middle layer 102, which is made of high-strength polyester fiber. A set of single-mode optical fibers 103 runs through the interior of the middle layer 102, and a set of FBG sensors 104 is integrated inside the set of single-mode optical fibers 103.

[0035] A set of phase-sensitive optical time-domain reflectometers 105 and a set of carbon nanotube composite filaments 106 both penetrate the interior of the middle layer 102, and the set of phase-sensitive optical time-domain reflectometers 105 are distributed circumferentially inside the middle layer 102.

[0036] A set of microelectrodes 107 are integrated on the outer surface of a set of carbon nanotube composite filaments 106, and the set of microelectrodes 107 are used for monitoring electrical signals. A metal connector 108 is connected to the top of the inner layer 101, and an annular groove is formed on the top of the inner wall of the metal connector 108.

[0037] A set of shape memory alloy springs 109 are embedded between the inner surfaces of the annular groove. The set of shape memory alloy springs 109 is used to provide adaptive support and cushioning. A fluororubber sealing ring 110 is connected to the bottom of the inner wall of the annular groove.

[0038] The fluororubber sealing ring 110 is used to prevent leakage of gas that may be transmitted inside the hose, and one end of a set of shape memory alloy springs 109 is connected to the outer surface of the fluororubber sealing ring 110. The inner surface of the fluororubber sealing ring 110 is connected to an expanded graphite sheet 111 to provide elastic deformation. The inner surfaces of the metal connector 108 are bolted to the equipment connector 200.

[0039] An accelerometer 112 is fixedly installed on the outer surface of the metal connector 108. A control box 113 is installed on the outer surface of the metal connector 108. An optical fiber signal conditioning module 114, a conductive network impedance measurement module 115, a communication module 116, and an edge processor 117 are respectively installed on one side of the inner wall of the control box 113. An indicator light 118 and a buzzer 119 are respectively provided on one side of the outer wall of the control box 113.

[0040] In use, by pre-setting the above components, a complete dual-mode fast sealing assembly 100 is formed. First, the FBG sensor 104 in the single-mode fiber 103 monitors and records local strain and ambient temperature changes in real time. Second, the phase-sensitive optical time-domain reflectometer 105 captures broadband acoustic waves in real time. Then, the impedance is detected by microelectrodes 107 using a mesh woven from carbon nanotube composite filaments 106. At this time, the fiber optic signal conditioning module 114 and the conductive network impedance measurement module 115 in the control box 113 receive and store data in real time. The edge processor 117 continuously updates the baseline model, and at the same time, the edge processor 117... The collected multi-dimensional signals are fused and analyzed to determine whether there is damage to the pipeline. The response is divided into three levels: Level 1 response: When the single-mode fiber optic cable 103 detects a significant change in pipeline temperature, the green indicator light 118 on the control box 113 illuminates via a conductive signal; Level 2 response: When the phase-sensitive optical time-domain reflectometer 105 detects a high-frequency sound wave, the red indicator light 118 flashes, and the buzzer 119 is activated synchronously. At this time, the shape memory alloy spring 109 enters a pre-compression state; Level 3 response: When the pressure sensor located inside the inner layer 101 ... When the internal pressure continues to drop, or when the accelerometer 112 senses a strong impact, the edge processor 117 sends an execution command to the sealing mechanism. The shape memory alloy spring 109 within the annular groove of the metal connector 108 receives the electrical signal and releases the pre-compression, generating axial thrust to push the fluororubber sealing ring 110 to expand radially, causing the fluororubber sealing ring 110 to completely cover the flow channel and achieve a sealing effect. Secondly, the expanded graphite sheet 111 on the inner side of the fluororubber sealing ring 110 begins to expand upon contact with trace amounts of water vapor in the combustion gas, filling the micro-gap between the fluororubber sealing ring 110 and the inner wall of the inner layer 101, thereby forming... The system provides effective dual sealing protection. After sealing is completed, the system continuously monitors the sealing status, using FBG sensor 104 to detect the strain stability of the sealing ring after expansion, and phase-sensitive optical time-domain reflectometer 105 to confirm the absence of continuous airflow noise. If there is no abnormal signal within 30 seconds, indicator light 118 on control box 113 turns yellow, and communication module 116 sends a sealing success signal. The entire process of dual-mode fast sealing component 100, from monitoring, judgment, response, sealing, and feedback, forms a complete closed-loop effect, solving the problems of blind spots and response lag in traditional hose monitoring and improving the safety protection requirements of high-pressure gas transmission.

[0041] Example 2: This example mainly addresses the issue that the outer sheath 301 of traditional hoses is mostly a single rubber or plastic layer, which has weak impact resistance. When encountering falling objects, mechanical collisions, or other situations, the energy generated will be directly transferred to the inner layer 101 structure, leading to serious consequences such as the breakage of reinforcing fibers, failure of the sensing layer, or even gas leakage.

[0042] This embodiment is designed to address the problems of the prior art by setting up a spiral protective layer assembly 300. First, a stainless steel spiral armor layer 305 is used to disperse the local impact force to each spiral ring through a 45-degree spiral structure. Combined with the tensile strength of stainless steel, it can effectively absorb the impact energy. The remaining impact is transmitted to the outer surface of the outer sheath 301. The hexagonal protrusions of the outer sheath 301 absorb a large amount of impact energy through elastic deformation. The shear-thickening fluid filled inside it changes from liquid to solid at the moment of impact, which enhances the absorption of impact energy, thereby effectively protecting the pipeline.

[0043] In some embodiments, according to Figures 1-3 as well as Figures 9-11 As shown, the spiral protective layer assembly 300 includes two magnetic snap rings 304 and a spiral armor layer 305. The two magnetic snap rings 304 are used to provide magnetic attraction force, and the spiral armor layer 305 is used to enhance the mechanical strength and impact resistance of the overall structure.

[0044] The spiral sheath assembly 300 also includes an outer sheath 301, and the inner surface of the outer sheath 301 is connected to the outer surface of the middle layer 102.

[0045] The outer surface of the outer sheath 301 adopts a hexagonal protrusion structure, and a set of hexagonal protrusion units independently encapsulates a shear thickening liquid composed of nano-silica and polyethylene glycol carrier liquid. The outer surface of a set of hexagonal protrusion units is connected to a PVDF piezoelectric film 302 for real-time monitoring of external impacts.

[0046] The outer surface of the outer sheath 301 is connected to a magnetic mesh 303. The outer surface of the magnetic mesh 303 is magnetically connected to one of the magnetic buckle rings 304. Each magnetic buckle ring 304 has a groove on one side of its outer wall, and the two grooves are embedded and connected to the two ends of the outer wall of the spiral armor layer 305. There is a ring of movable gap between the inner surface of the spiral armor layer 305 and the outer surface of the outer sheath 301.

[0047] In use, the above components form a complete spiral sheath assembly 300. First, the outer sheath 301 tightly wraps around the outer side of the middle layer 102. The hexagonal protrusions on its surface maintain an effective clearance with the outer stainless steel spiral armor layer 305. This clearance, combined with the grooves between the protrusions, forms a labyrinthine airflow channel, utilizing natural convection to help the hose dissipate heat, thereby effectively reducing the temperature during pipe operation. The spiral armor layer 305 is wound around the outer side of the outer sheath 301 at a 45-degree angle, and both ends are fixed by magnetic snap rings 304. With the cooperation of the magnetic snap rings 304 and the spiral armor layer 305, rapid... The rapid splicing effect improves installation efficiency and facilitates subsequent maintenance and replacement of the spiral armor layer 305. The inner groove of the magnetic snap ring 304 holds the end of the spiral armor layer 305, while the outer side is magnetically attracted to the magnetic mesh 303 on the surface of the outer sheath 301. This effectively ensures that the spiral armor layer 305 does not loosen and avoids direct contact with the outer sheath 301, reducing wear caused by daily bending and vibration. Furthermore, the shear-thickening fluid encapsulated inside the protrusion of the outer sheath 301 maintains good flexibility and does not affect the bending performance of the hose. When encountering external impact, the component provides layer-by-layer protection through two levels of protection. To disperse energy and prevent impact damage to the inner layer 101 structure, the impact first acts on the outer wall of the stainless steel spiral armor layer 305. The spiral armor layer 305 utilizes its spiral structure to distribute the localized impact force to each spiral ring. Combined with the tensile strength of stainless steel, it directly and effectively absorbs the impact energy from the external impact, preventing the impact force from concentrating at a single point and causing localized deformation. Subsequently, the remaining energy is transferred to the hexagonal protrusions of the outer sheath 301. The protrusions absorb energy through elastic deformation. Simultaneously, the internal shear-thickening fluid instantly changes from a liquid to a solid state due to the shear force generated by the impact, rapidly absorbing the remaining energy. Ultimately, this significantly reduces the energy transferred to the middle layer 102. The impact energy of the enhanced fiber is effectively avoided, thus preventing the risk of leakage and damage to the entire gas pipeline due to impact. At the same time, when the impact occurs, the spiral sheath assembly 300 simultaneously activates the PVDF piezoelectric film 302. The electrical signal generated by the impact deformation of the PVDF piezoelectric film 302 is then transmitted to the end control box 113 through the lead wire. These signals are fused with the stress wave captured by the phase-sensitive optical time-domain reflectometer 105 inside the hose and the impedance change of the carbon composite filament 106 mesh to form effective three-dimensional data. The spiral sheath assembly 300 effectively solves the problems of weak impact resistance, poor heat dissipation, and difficult maintenance of the traditional outer sheath 301.

[0048] In a more specific embodiment, the combination of the dual-mode quick-sealing assembly 100 described in Example 1 and the spiral sheath assembly 300 described in Example 2 results in the following: The spiral sheath assembly 300 forms the first line of defense for the hose. Firstly, the outer stainless steel spiral armor layer 305 disperses most of the external impact energy through a 45-degree winding structure. Subsequently, the elastic deformation of the hexagonal protrusions and the instantaneous solidification of the shear-thickening fluid physically prevent the fatal damage caused by the impact to the inner layer 101 of the hose. Then, the dual-mode quick-sealing assembly 100, using a dual-mode monitoring system composed of an FBG sensor 104, a phase-sensitive optical time-domain reflectometer 105, and a carbon nanotube composite filament 106, captures the impact energy in real time. Micro-damage within the inner layer 101 that is not completely blocked by the spiral sheath poses a leakage risk. A shape memory alloy spring 109 pushes the fluororubber sealing ring 110 to achieve a mechanical hard seal in a very short time. Subsequently, an expanded graphite sheet 111 fills the micro-gap, creating a seamless connection between the impact-resistant outer layer and the self-sealing inner layer 101. Furthermore, the monitoring systems of the dual-mode quick-sealing assembly 100 and the spiral sheath assembly 300 complement each other. The PVDF piezoelectric film 302 of the spiral sheath assembly 300 can capture external impact signals in real time, as well as acoustic signals captured by the phase-sensitive optical time-domain reflectometer 105 of the dual-mode quick-sealing assembly 100 and carbon nanotube composite filaments 10. The impedance change captured by the 6th component is then fused with the strain data captured by the FBG sensor 104. When the gas riser of a high-rise building encounters wall compression or external impact, the piezoelectric signal of the spiral sheath assembly 300 first triggers an early warning. The FBG sensor 104 of the dual-mode quick-sealing assembly 100 immediately locates the strain change in the compression area, and the carbon composite filament 106 simultaneously verifies whether fiber breakage has occurred. Through multi-signal cross-verification, the misjudgment of a single sensor due to temperature and electromagnetic interference can be effectively avoided. In terms of response efficiency, the impact signal of the spiral sheath assembly 300 can activate the dual-mode quick-sealing assembly 100 in advance. When the impact energy is too large, the shape memory alloy spring 1 of the dual-mode quick-sealing assembly 100... 09 immediately enters the pre-compression state, effectively shortening the subsequent sealing response time. In terms of maintenance costs, the combination of the detachable magnetic snap ring 304 of the spiral sheath assembly 300 and the modular sensor of the dual-mode fast sealing assembly 100, which consists of an optical fiber signal conditioning module 114, a conductive network impedance measurement module 115, a communication module 116, and an edge processor 117, can effectively improve maintenance efficiency and time costs. This combination of the dual-mode fast sealing assembly 100 and the spiral sheath assembly 300 truly achieves effective protection for gas hoses, completely solving the pain points of traditional gas hoses having weak impact resistance on the outer layer and blind spots in the monitoring of the inner 101 pipeline, as well as the inability to effectively seal gas leaks.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite flexible hose structure for gas transmission, characterized in that: It includes a dual-mode quick-seal assembly (100), a spiral protective layer assembly (300), and an equipment connector (200). The bottom of the equipment connector (200) is respectively provided with the dual-mode quick-seal assembly (100) and the spiral protective layer assembly (300). The dual-mode quick-seal assembly (100) is installed between the inner surfaces of the spiral protective layer assembly (300). The dual-mode fast-sealing assembly (100) includes a set of FBG sensors (104), a set of phase-sensitive optical time-domain reflectometers (105), and a set of carbon nanotube composite filaments (106). The set of FBG sensors (104) is used to provide high-resolution point-type physical quantity data. The set of phase-sensitive optical time-domain reflectometers (105) is used to capture overall state changes along the line. The set of carbon nanotube composite filaments (106) is composed of carbon nanotubes and TPU composite filaments, and the set of carbon nanotube composite filaments (106) is used to enhance the structural strength and toughness of the hose and provide a continuous conductive path. The dual-mode fast sealing assembly (100) also includes an inner layer (101), which is made of fluororubber or nitrile rubber. The outer surface of the inner layer (101) is covered with a middle layer (102), which is made of high-strength polyester fiber. A set of single-mode optical fibers (103) runs through the interior of the middle layer (102), and a set of FBG sensors (104) is integrated inside the set of single-mode optical fibers (103). A set of phase-sensitive optical time-domain reflectometers (105) and a set of carbon nanotube composite filaments (106) both penetrate the interior of the middle layer (102), and the set of phase-sensitive optical time-domain reflectometers (105) is distributed circumferentially inside the middle layer (102); A set of microelectrodes (107) are integrated on the outer surface of a set of carbon nanotube composite filaments (106), and the set of microelectrodes (107) are used for monitoring electrical signals. A metal connector (108) is connected to the top of the inner layer (101), and an annular groove is provided on the top of the inner wall of the metal connector (108). A set of memory alloy springs (109) is embedded between the inner surfaces of the annular groove. The set of memory alloy springs (109) is used to provide adaptive support and cushioning. A fluororubber sealing ring (110) is connected to the bottom of the inner wall of the annular groove. The fluororubber sealing ring (110) is used to prevent leakage of gas that may be transmitted inside the hose, and one end of a set of memory alloy springs (109) is connected to the outer surface of the fluororubber sealing ring (110). The inner surface of the fluororubber sealing ring (110) is connected to an expanded graphite sheet (111) to provide elastic deformation. The inner surfaces of the metal connector (108) are bolted to the equipment connector (200). The spiral protective layer assembly (300) includes two magnetic snap rings (304) and a spiral armor layer (305). The two magnetic snap rings (304) are used to provide magnetic attraction force, and the spiral armor layer (305) is used to enhance the mechanical strength and impact resistance of the overall structure.

2. The composite flexible hose structure for gas transmission according to claim 1, characterized in that: An accelerometer (112) is fixedly installed on the outer surface of the metal connector (108). A control box (113) is installed on the outer surface of the metal connector (108). An optical fiber signal conditioning module (114), a conductive network impedance measurement module (115), a communication module (116), and an edge processor (117) are respectively installed on one side of the inner wall of the control box (113). An indicator light (118) and a buzzer (119) are respectively provided on one side of the outer wall of the control box (113).

3. The composite flexible hose structure for gas transmission according to claim 2, characterized in that: The spiral sheath assembly (300) also includes an outer sheath (301), and the inner surface of the outer sheath (301) is connected to the outer surface of the middle layer (102).

4. The composite flexible hose structure for gas transmission according to claim 3, characterized in that: The outer surface of the outer sheath (301) adopts a hexagonal protrusion structure, and a set of hexagonal protrusion units independently encapsulates a shear thickening liquid composed of nano-silica and polyethylene glycol carrier liquid. The outer surface of a set of hexagonal protrusion units is connected to a PVDF piezoelectric film (302) for real-time monitoring of external impacts.

5. The composite flexible hose structure for gas transmission according to claim 4, characterized in that: The outer surface of the outer sheath (301) is connected to a magnetic mesh (303). The outer surface of the magnetic mesh (303) is magnetically connected to one of the magnetic buckle rings (304). Each magnetic buckle ring (304) has a groove on one side of its outer wall, and the two grooves are embedded and connected to the two ends of the outer wall of the spiral armor layer (305). There is a ring of movable gap between the inner surface of the spiral armor layer (305) and the outer surface of the outer sheath (301).

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