Thermoplastic lining glass fiber reinforced plastic composite pipe

Abstract

The invention provides a thermoplastic plastic lining glass fiber reinforced plastic composite pipe. The composite pipe comprises a lining layer, a barrier structure layer and a glass fiber reinforced plastic reinforcing layer, the barrier structure layer is bonded to the outer surface of the lining layer, the outer ring of the barrier structure layer is spirally wound by a glass fiber presoaking epoxy resin belt and then is heated and cured to form the glass fiber reinforced plastic reinforcing layer, and the thermoplastic plastic lining glass fiber reinforced plastic composite pipe is used for conveying hydrogen. By means of the arrangement, the thermoplastic lining glass fiber reinforced plastic composite pipe has the performance of high gas barrier property, high pressure bearing capacity, high strength and the like at the same time, and the high-pressure pure hydrogen conveying requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen transmission pipelines, and in particular to a thermoplastics lined glass fiber reinforced plastic composite pipe. Background Art

[0002] The use of hydrogen energy is a major component of my country's "dual carbon" strategy. The hydrogen energy industry is a strategic emerging industry in my country. The country is making every effort to coordinate the development of the entire chain of hydrogen energy "storage, transportation and use". In 2022, the National Development and Reform Commission issued the "Medium- and Long-Term Plan for the Development of the Hydrogen Industry (2021-2035)", which clearly requires "to carry out pilot demonstrations such as hydrogen-blended natural gas pipelines and pure hydrogen pipelines." Most of the existing hydrogen transmission pipelines are low-grade steel metal pipelines with limited pressure bearing capacity. To increase the pressure bearing capacity, the wall thickness needs to be increased, resulting in increased production, transportation and construction costs, reduced economic efficiency, and inability to achieve high-pressure transportation of pure hydrogen. High-grade steel pipelines face the problem of hydrogen embrittlement and are still under research. They cannot be used for high-pressure pure hydrogen transportation. In addition, the production, transportation and construction of steel pipelines are The high energy consumption and carbon emissions in the installation and post-maintenance links are not in line with the national dual carbon strategy. Hydrogen is a colorless and odorless gas that is difficult to liquefy, extremely easy to diffuse and penetrate, has a low ignition energy of 0.019mJ, is extremely flammable, and has an explosion limit of 4% to 75%. As a non-metallic pipeline for high-pressure pure hydrogen transportation, it needs to have high pressure bearing, high gas barrier, high air tightness, antistatic, flame retardant and other properties. The existing non-metallic pipelines for gas transmission in oil and gas fields have gas permeation problems in terms of structure and material selection, and most of the materials are non-conductive polymer materials, which cannot meet the above requirements at the same time. Summary of the invention

[0003] The main purpose of the present invention is to provide a thermoplastic plastic lined glass fiber reinforced plastic composite pipe to solve the problems of poor load-bearing capacity and poor air tightness in the prior art.

[0004] In order to achieve the above-mentioned object, according to one aspect of the present invention, a thermoplastic lined fiberglass composite pipe is provided. The thermoplastic lined fiberglass composite pipe comprises: a lining layer, a barrier structure layer and a fiberglass reinforcement layer, the barrier structure layer is bonded to the outer surface of the lining layer, the outer ring of the barrier structure layer is spirally wound with a glass fiber pre-impregnated epoxy resin tape, and then heated and cured to form a fiberglass reinforcement layer, and the thermoplastic lined fiberglass composite pipe is used to transport hydrogen.

[0005] Furthermore, the lining layer includes: an antistatic layer; a barrier functional layer, the barrier functional layer is located on the outer circle of the antistatic layer; a high-strength layer, the high-strength layer is located on the outer circle of the barrier structure layer, a hot melt adhesive layer is provided between the antistatic layer and the barrier functional layer, a hot melt adhesive layer is provided between the barrier functional layer and the high-strength layer, or the antistatic layer, the barrier functional layer and the high-strength layer are directly hot-melt bonded.

[0006] Furthermore, the antistatic layer is obtained by extrusion molding of thermoplastic plastics, the thermoplastic plastics include at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK, the antistatic layer is modified by chopped carbon fiber CF, carbon nanotube CNT, graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and conductive carbon black CB, and the surface resistance of the inner surface of the antistatic layer is less than or equal to 1×10 6 Ω.

[0007] Furthermore, the barrier functional layer has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, and the high barrier polymer includes at least one of ethylene-vinyl alcohol polymer EVOH, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

[0008] Furthermore, the barrier functional layer has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, and the first polymer material includes polyethylene PE and polypropylene PP modified based on graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and montmorillonite nano-sheet materials.

[0009] Furthermore, the high-strength layer is obtained by extrusion molding a second polymer material having a tensile strength greater than or equal to 20 MPa and a tensile modulus greater than or equal to 500 MPa, and the second polymer material includes at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

[0010] Furthermore, the barrier structure layer includes an aluminum-plastic belt and a stop belt. The aluminum-plastic belt is spirally wound on the outer peripheral surface of the inner lining layer, and the stop belt is spirally wound on the outer peripheral surface of the aluminum-plastic belt. The pitch of the aluminum-plastic belt is 1 / 2 to 1 / 3 of the width of the aluminum-plastic belt, the width of the stop belt is 3 to 5 mm, the thickness of the stop belt is 3 to 5 mm, the pitch of the stop belt is 1 / 2 to 1 / 3 of the outer diameter of the composite pipe, the stop belt is arranged at a density of 2 per meter along the axial direction of the composite pipe, and the number of turns of each stop belt is greater than or equal to 3 turns.

[0011] Furthermore, the aluminum-plastic tape includes an aluminum foil and a heat-sealing layer, which are connected, one end of the aluminum foil is wrapped around the outer surface of the inner lining layer, and the other end of the aluminum foil is spirally extended along the axial direction of the inner lining layer, and during the spiral extension process, the aluminum foil forms an aluminum-plastic tape layer on the surface of the inner lining layer, and there is an overlapping part between two adjacent aluminum-plastic tape layers, wherein the heat-sealing layer is used to hot-melt bond part of the aluminum foil to the outer surface of the inner lining layer, and to hot-melt bond another part of the aluminum foil to the overlapping area.

[0012] Furthermore, the total number of layers of the glass fiber pre-impregnated epoxy resin tape is an even number, the glass fiber pre-impregnated epoxy resin tape is wound along the radial direction of the barrier structure layer, the winding directions of the two adjacent layers of the glass fiber pre-impregnated epoxy resin tape are opposite, and the angle between the glass fiber pre-impregnated epoxy resin tape and the axial direction of the composite pipe is ±45° to 65°.

[0013] Furthermore, the antistatic layer, the barrier function layer and the high-strength layer are co-extruded and integrated into a multi-layer structure.

[0014] Furthermore, the outer surface of the lining layer, the inner surface of the aluminum-plastic belt, the outer surface of the aluminum-plastic belt and the inner surface of the stopper belt are preheated by a hot air gun or infrared rays until they are thermally fused.

[0015] By applying the technical solution of the present invention, an inner lining layer, a barrier structure layer and a FRP reinforcement layer are provided. The barrier structure layer can effectively prevent the hydrogen in the inner lining layer from penetrating into the FRP reinforcement layer, thereby playing a role in corrosion resistance and permeation resistance and having gas barrier properties. The FRP reinforcement layer can effectively improve the strength and rigidity of the composite pipe, enhance its pressure bearing performance and make it more durable. The FRP reinforcement layer has good corrosion resistance and can resist the erosion of chemical media, thereby ensuring the stability and reliability of the composite pipe in harsh environments. At the same time, the process of spirally winding glass fiber pre-impregnated epoxy resin tape is adopted, so that the manufacture and construction of the composite pipe are simpler, the cost is reduced and the production efficiency is improved, so that the thermoplastic plastic lined FRP composite pipe has the properties of high gas barrier properties, high pressure bearing capacity and high strength, and meets the requirements of high-pressure pure hydrogen transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic cross-sectional structure diagram of a thermoplastic lined glass fiber reinforced plastic composite pipe according to the present invention is shown.

[0018] The above drawings include the following reference numerals:

[0019] 1. Lining layer; 11. Antistatic layer; 12. Barrier functional layer; 13. High strength layer;

[0020] 2. Barrier structure layer; 21. Aluminum-plastic belt; 22. Stop belt;

[0021] 3. Glass fiber reinforced plastic reinforcement layer. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0026] Combination Figure 1 As shown, according to a specific embodiment of the present invention, a thermoplastic lined glass fiber reinforced plastic composite pipe is provided.

[0027] Specifically, Figure 1As shown, the thermoplastic plastic lined fiberglass composite pipe includes: an inner lining layer 1, a barrier structure layer 2 and a fiberglass reinforcement layer 3. The barrier structure layer 2 is bonded to the outer surface of the inner lining layer 1. The outer ring of the barrier structure layer 2 is spirally wound with a glass fiber pre-impregnated epoxy resin tape and then heated and cured to form the fiberglass reinforcement layer 3. The thermoplastic plastic lined fiberglass composite pipe is used to transport high-pressure hydrogen.

[0028] In this embodiment, by providing an inner lining layer 1, a barrier structure layer 2 and a FRP reinforcement layer 3, the barrier structure layer 2 can effectively prevent the hydrogen in the inner lining layer 1 from penetrating into the FRP reinforcement layer 3, thereby playing an anti-corrosion and anti-permeation role and having gas barrier properties. The FRP reinforcement layer 3 can effectively improve the strength and rigidity of the composite pipe, enhance its pressure bearing performance, and make it more durable. The FRP reinforcement layer 3 has good corrosion resistance and can resist the erosion of chemical media, thereby ensuring the stability and reliability of the composite pipe in harsh environments. At the same time, the process of spirally winding glass fiber pre-impregnated epoxy resin tape is adopted, which makes the manufacture and construction of the composite pipe simpler, reduces costs, and improves production efficiency, so that the thermoplastic plastic lined FRP composite pipe has high gas barrier properties, high pressure bearing capacity, high strength and other properties at the same time, meeting the requirements of high-pressure pure hydrogen transportation.

[0029] Furthermore, the lining layer 1 includes: an antistatic layer 11; a barrier functional layer 12, the barrier functional layer 12 is located on the outer circle of the antistatic layer 11; a high-strength layer 13, the high-strength layer 13 is located on the outer circle of the barrier functional layer 12, a hot melt adhesive layer is provided between the antistatic layer 11 and the barrier functional layer 12, a hot melt adhesive layer is provided between the barrier functional layer 12 and the high-strength layer 13, or the antistatic layer 11, the barrier functional layer 12 and the high-strength layer 13 are directly hot-melt bonded.

[0030] This arrangement helps to provide better protection performance and increase the wear resistance and durability of the inner lining layer. The hot melt adhesive layer can effectively bond the various layers of materials, and delamination is not likely to occur. At the same time, the hot melt adhesive layer can also fill the tiny gaps between the various layers of materials, improve the sealing performance of the inner lining layer 1, and prevent external harmful substances from penetrating into the inner lining layer 1. In this way, the inner lining layer 1 has high gas barrier properties, antistatic properties, high pressure bearing capacity and high strength, etc., meeting the requirements of high-pressure pure hydrogen transportation.

[0031] Furthermore, the antistatic layer 11 is obtained by extrusion molding of thermoplastic plastics, and the thermoplastic plastics include at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK. The antistatic layer 11 is modified by chopped carbon fiber CF, carbon nanotube CNT, graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and conductive carbon black CB, and the surface resistance of the inner surface of the antistatic layer 11 is less than or equal to 1×10 6 Ω.

[0032] Such arrangement strengthens the conductive property of antistatic layer 11, improves the antistatic ability of antistatic layer 11.Such arrangement can effectively prevent the accumulation of static electricity, reduce the impact of static electricity on equipment and products, and improve the safety and stability of equipment and products.Simultaneously, the addition of materials such as chopped carbon fiber, carbon nanotube, graphene and derivative can also improve the mechanical properties of antistatic layer, increase its strength and wear resistance, and prolong service life.Therefore, by thermoplastic extrusion molding and through the modification of chopped carbon fiber, carbon nanotube, graphene and derivative, the antistatic layer can be made to have better performance and reliability.

[0033] Furthermore, the barrier functional layer 12 has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, and the high barrier polymer includes at least one of ethylene-vinyl alcohol polymer EVOH, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

[0034] This can effectively block the penetration of hydrogen. These high-barrier polymers have excellent gas barrier properties, can prevent the penetration of harmful substances such as oxygen, water vapor, odor, etc., maintain the stability of the internal environment of the liner 1, and effectively protect the quality of the composite pipe. At the same time, these high-barrier polymers also have good heat resistance, chemical resistance and mechanical properties.

[0035] Furthermore, the barrier functional layer 12 has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, and the first polymer material includes polyethylene PE and polypropylene PP modified based on graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and montmorillonite nano-sheet materials.

[0036] The addition of graphene and its derivatives to the polymer can improve the mechanical properties and gas barrier properties of the material, and the addition of montmorillonite nano-sheet material can increase the barrier effect of the material. This arrangement improves the gas barrier properties of the liner layer 1.

[0037] Furthermore, the high-strength layer 13 is obtained by extrusion molding a second polymer material having a tensile strength greater than or equal to 20 MPa and a tensile modulus greater than or equal to 500 MPa, and the second polymer material includes at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

[0038] This can ensure that the high-strength layer 13 has sufficient tensile strength and modulus. In addition, since these materials have good wear resistance and chemical corrosion resistance, the service life and stability of the high-strength layer 13 can be improved.

[0039] Furthermore, the barrier structure layer 2 includes an aluminum-plastic tape 21 and a stop tape 22. The aluminum-plastic tape 21 is spirally wound on the outer peripheral surface of the inner lining layer 1, and the stop tape 22 is spirally wound on the outer peripheral surface of the aluminum-plastic tape 21. The pitch of the aluminum-plastic tape 21 is 1 / 2 to 1 / 3 of the width of the aluminum-plastic tape 21, the width of the stop tape 22 is 3 to 5 mm, the thickness of the stop tape 22 is 3 to 5 mm, the pitch of the stop tape 22 is 1 / 2 to 1 / 3 of the outer diameter of the composite pipe, the stop tape 22 is arranged at a density of 2 pieces / meter along the axial direction of the composite pipe, and the number of turns of each stop tape 22 is greater than or equal to 3 turns.

[0040] Such an arrangement can enhance the stability and durability of the barrier structure layer 2. The aluminum-plastic strip 21 can improve the strength and rigidity of the barrier structure layer 2, while preventing deformation and damage of the lining layer 1, while the stopper strip 22 can prevent the aluminum-plastic strip 21 from loosening and sliding, thereby maintaining the tightness and integrity of the barrier structure layer 2. Such an arrangement can effectively enhance the barrier effect of the barrier structure layer 2 and extend its service life.

[0041] Furthermore, the aluminum-plastic tape 21 includes an aluminum foil and a heat-sealing layer, which are connected, one end of the aluminum foil is wrapped around the outer surface of the inner lining layer 1, and the other end of the aluminum foil is spirally extended along the axial direction of the inner lining layer 1, and during the spiral extension process, the aluminum foil forms an aluminum-plastic tape layer on the surface of the inner lining layer 1, and there is an overlapping part between two adjacent aluminum-plastic tape layers, wherein the heat-sealing layer is used to hot-melt bond part of the aluminum foil to the outer surface of the inner lining layer 1, and to hot-melt bond another part of the aluminum foil to the overlapping area.

[0042] The aluminum foil enhances the sealing performance and corrosion resistance of the aluminum-plastic tape, and the heat-sealing layer can improve the mechanical strength of the aluminum-plastic tape, increase its tensile and compressive properties, and make it more durable and reliable. Therefore, the design of the aluminum-plastic tape 21 including the aluminum foil and the heat-sealing layer can improve the overall performance and use effect of the composite pipe.

[0043] Furthermore, the total number of layers of the glass fiber pre-impregnated epoxy resin tape is an even number, the glass fiber pre-impregnated epoxy resin tape is wound along the radial direction of the barrier structure layer 2, the winding directions of the two adjacent layers of the glass fiber pre-impregnated epoxy resin tape are opposite, and the angle between the glass fiber pre-impregnated epoxy resin tape and the axial direction of the composite pipe is ±45° to 65°.

[0044] Glass fiber pre-impregnated epoxy resin tape is a product used for reinforcing materials. It consists of glass fiber cloth and epoxy resin. The glass fiber cloth is first impregnated with epoxy resin and then dried to form pre-impregnated epoxy resin tape. This product has the characteristics of high strength, good corrosion resistance, and excellent electrical insulation performance. It is widely used in aerospace, automobile, shipbuilding, construction and other fields. The total number of layers of glass fiber pre-impregnated epoxy resin tape winding is an even number of layers, which can make the composite pipe obtain balanced reinforcement in all directions, and improve the overall strength and stiffness of the composite pipe. The angle between the glass fiber pre-impregnated epoxy resin tape and the axial direction of the composite pipe is ±45°~65°. Such a setting can make the composite pipe still maintain good performance in a high temperature environment and have good high temperature resistance. Through reasonable winding method and angle setting, the amount of material used can be minimized to the greatest extent, thereby reducing the weight of the composite pipe and improving its convenience and economy of use.

[0045] Furthermore, the antistatic layer 11, the barrier function layer 12 and the high-strength layer 13 are co-extruded and integrated into a multi-layer structure.

[0046] The antistatic layer 11 can effectively prevent static electricity accumulation, reduce the possibility of static electricity discharge, and protect the inner lining layer from static electricity damage. The barrier function layer 12 can effectively isolate external moisture, oxygen and other harmful substances, and protect hydrogen from the influence of the external environment. The high-strength layer 13 can increase the strength and wear resistance of the composite pipe, extend the service life of the composite pipe, and improve the durability and stability of the composite pipe. Multi-layer co-extrusion integrated molding can make each layer of material more closely combined, reduce the gap between layers, and improve the overall performance and quality of the product. Such a setting can complete the superposition of multiple functions in a one-time molding process, improve production efficiency, reduce production costs, and improve product competitiveness.

[0047] Furthermore, the outer surface of the inner lining layer 1, the inner surface of the aluminum-plastic belt 21, and the outer surface of the aluminum-plastic belt 21 and the inner surface of the stopper belt 22 are preheated by a hot air gun or infrared rays until they are thermally fused. Preheating can make the outer surface of the inner lining layer 1, the inner surface of the aluminum-plastic belt 21, the outer surface of the aluminum-plastic belt 21, and the inner surface of the stopper belt 22 reach the required thermal melting temperature, thereby better achieving thermal fusion and increasing the firmness and stability of the connection.

[0048] In another embodiment of the present application, a method for preparing a thermoplastic lined glass fiber reinforced plastic composite pipe is provided, comprising:

[0049] (1) The preparation method of the inner lining layer includes: the inner lining layer is obtained by integrating an antistatic layer, a barrier functional layer and a high-strength layer through a multi-layer co-extrusion technology, and the inner lining layer is cut according to the length of the pipe before being coated with the barrier structure layer, and the length is generally 9 meters, 14 meters or 22 meters.

[0050] (2) The preparation method of the barrier structure layer includes: preheating the outer surface of the inner lining layer, the inner and outer surfaces of the aluminum-plastic tape, and the stopper tape in sequence by means of a hot air gun or infrared heating, so that the surface reaches a state that can be heat-welded, the aluminum-plastic tape is spirally wound on the outer surface of the inner lining layer to achieve heat-welding between the two layers, the stopper tape is spirally wound on the outer surface of the aluminum-plastic tape, and the preparation of the barrier structure layer is completed after cooling.

[0051] (3) The preparation method of the FRP reinforcement layer includes: spirally winding a glass fiber pre-impregnated epoxy resin tape on the barrier structure layer, and the total number of winding layers is an even number of layers, and the specific number of layers is determined according to the pressure level of the pipe. The winding directions of the two adjacent layers are opposite, and the angle with the axial direction of the pipe is ±45° to 65°. After the winding is completed, external heating curing is completed by infrared heating, and finally a thermoplastic plastic lined FRP composite pipe is prepared.

[0052] Compared with steel hydrogen pipes, non-metallic pipes are not only highly designable, lightweight, and free of hydrogen embrittlement risk, but also require no welding and are quick and easy to connect. They can also reduce carbon emissions by more than 30% and energy consumption by more than 50% throughout their entire life cycle from production to application, making them a highly promising development direction for hydrogen pipelines.

[0053] The present invention provides a thermoplastic lined fiberglass composite pipe for high-pressure hydrogen transportation and a preparation method thereof. Innovations are made in structural design, material selection and manufacturing technology so that the thermoplastic lined fiberglass composite pipe has high gas barrier properties, antistatic properties, high pressure bearing capacity and high strength, etc., to meet the requirements of high-pressure pure hydrogen transportation.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0056] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermoplastic lined glass fiber reinforced plastic composite pipe, It is characterized in that include: An inner lining layer (1), a barrier structure layer (2) and a glass fiber reinforced plastic reinforcement layer (3), wherein the barrier structure layer (2) is bonded to the outer surface of the inner lining layer (1), the outer ring of the barrier structure layer (2) is spirally wound with a glass fiber pre-impregnated epoxy resin tape, and then heated and cured to form the glass fiber reinforced plastic reinforcement layer (3), and the thermoplastic plastic lined glass fiber reinforced plastic composite pipe is used for transporting hydrogen.

2. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 1, It is characterized in that The inner lining layer (1) comprises: Antistatic layer (11); A barrier function layer (12), wherein the barrier function layer (12) is located on the outer circle of the antistatic layer (11); A high-strength layer (13), the high-strength layer (13) is located on the outer circle of the barrier function layer (12), a hot melt adhesive layer is provided between the antistatic layer (11) and the barrier function layer (12), a hot melt adhesive layer is provided between the barrier function layer (12) and the high-strength layer (13), or the antistatic layer (11), the barrier function layer (12) and the high-strength layer (13) are directly hot-melt bonded.

3. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 2, It is characterized in that The antistatic layer (11) is obtained by extrusion molding of thermoplastic plastics, wherein the thermoplastic plastics include at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK. The antistatic layer (11) is modified by chopped carbon fiber CF, carbon nanotube CNT, graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and conductive carbon black CB. The surface resistance of the inner surface of the antistatic layer (11) is less than or equal to 1×10 6 Ω.

4. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 2, It is characterized in that The barrier functional layer (12) has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, wherein the high barrier polymer includes at least one of ethylene vinyl alcohol polymer EVOH, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

5. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 2, It is characterized in that The barrier functional layer (12) has a hydrogen permeability coefficient less than or equal to 1×10 -14 cm 3 cm / (cm 2 ·s·Pa) is obtained by extrusion molding, wherein the first polymer material includes polyethylene PE and polypropylene PP modified based on graphene Grophene and its derivatives, graphene oxide GO, reduced graphene oxide rGO, and montmorillonite nano-sheet materials.

6. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 2, It is characterized in that The high-strength layer (13) is obtained by extrusion molding a second polymer material having a tensile strength greater than or equal to 20 MPa and a tensile modulus greater than or equal to 500 MPa, wherein the second polymer material comprises at least one of polyethylene PE, polypropylene PP, polyphenylene sulfide PPS, polyamide PA, and polyaryletherketone PAEK.

7. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 1, It is characterized in that The barrier structure layer (2) comprises an aluminum-plastic tape (21) and a stop tape (22); the aluminum-plastic tape (21) is spirally wound on the outer peripheral surface of the inner lining layer (1); the stop tape (22) is spirally wound on the outer peripheral surface of the aluminum-plastic tape (21); the pitch of the aluminum-plastic tape (21) is 1 / 2 to 1 / 3 of the width of the aluminum-plastic tape (21); the width of the stop tape (22) is 3 to 5 mm; the thickness of the stop tape (22) is 3 to 5 mm; the pitch of the stop tape (22) is 1 / 2 to 1 / 3 of the outer diameter of the composite pipe; the stop tape (22) is arranged at a density of 2 pieces / meter along the axial direction of the composite pipe; and the number of turns of each stop tape (22) is greater than or equal to 3 turns.

8. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 7, It is characterized in that The aluminum-plastic tape (21) comprises an aluminum foil and a heat-sealing layer, wherein the aluminum foil and the heat-sealing layer are connected, wherein one end of the aluminum foil is wound around the outer surface of the inner lining layer (1), and the other end of the aluminum foil is spirally extended along the axial direction of the inner lining layer (1), and during the spiral extension process, the aluminum foil forms an aluminum-plastic tape layer on the surface of the inner lining layer (1), and there is an overlapping portion between two adjacent aluminum-plastic tape layers, wherein the heat-sealing layer is used to hot-melt bond part of the aluminum foil to the outer surface of the inner lining layer (1), and to hot-melt bond another part of the aluminum foil to the overlapping area.

9. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 1, It is characterized in that The total number of layers of the glass fiber pre-impregnated epoxy resin tape is an even number, the glass fiber pre-impregnated epoxy resin tape is wound along the radial direction of the barrier structure layer (2), the winding directions of the glass fiber pre-impregnated epoxy resin tapes of two adjacent layers are opposite, and the angle between the glass fiber pre-impregnated epoxy resin tape and the axial direction of the composite tube is ±45° to 65°.

10. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 2, It is characterized in that The antistatic layer (11), the barrier function layer (12) and the high-strength layer (13) are formed by multi-layer co-extrusion integration.

11. The thermoplastic lined glass fiber reinforced plastic composite pipe according to claim 7, It is characterized in that The outer surface of the inner lining layer (1), the inner surface of the aluminum-plastic belt (21), the outer surface of the aluminum-plastic belt (21) and the inner surface of the stop belt (22) are preheated by a hot air gun or infrared rays until they are thermally fused.

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