Enhanced psp conduit

Abstract

The utility model relates to a kind of enhanced PSP pipelines, 1. it includes inner layer pipe, metal pipe layer, continuous fiber winding reinforcement layer and outer layer in turn from inside to outside;The inner layer pipe and outer layer are thermoplastic materials;The continuous fiber winding reinforcement layer is formed by continuous fiber with spin direction alternation mode winding;The end or outer surface of the enhanced PSP pipeline is provided with parallel groove or thread groove, for installing metal hoop or metal buckling connection component;The inner layer pipe, metal pipe layer, continuous fiber winding reinforcement layer and outer layer are integrated by thermoplastic plastic hot melt bonding.Between thus, connection operation is better in convenience, can be completed pipeline butt joint quickly, simultaneously, the close cooperation of groove structure and metal connecting component, the hot melt bonding of cooperation between each layer is firm, so that connecting part is not easy to loosen or leak, and connection reliability is relatively better.

Description

Technical Field

[0001] This utility model relates to the field of pipeline technology, and in particular to an enhanced PSP pipeline. Background Technology

[0002] In the field of pipeline transportation, PSP pipes (plastic-metal composite pipes) have been widely used due to their high pressure resistance and high ring stiffness. However, current PSP pipes have revealed many problems that urgently need to be solved in practical applications. For example, connection difficulties and frequent leaks at pipe joints are common issues.

[0003] In the existing technology CN222392180U, a fiber-reinforced composite pipe injection joint is used. This joint body is fixedly connected to the end of the composite pipe via hot-melt welding. While this provides a certain degree of sealing to the pipe end face, ensuring no water leakage and preventing the transported medium from seeping into the pipe wall, and the use of butt welding reduces the need for separate pipe fittings, this connection method still has significant limitations. Firstly, the connection operation is inconvenient. The hot-melt connection process demands a high level of skill from the operator and the operating environment, requiring strict control of parameters such as temperature, pressure, and time. Any deviation can easily lead to unstable welding quality and potential leakage. Secondly, this injection joint structure only seals the end of the composite pipe, without further optimization or reinforcement of the overall pipe structure. It cannot effectively address the various mechanical challenges the pipe may face under complex operating conditions. For example, in areas with high pressure, high vibration, or complex geological conditions, the reliability of the pipe connection and the overall structure is difficult to guarantee.

[0004] In addition, traditional PSP pipe connections mostly rely on hot-melt welding between the inner and outer pipes. This process is not only cumbersome, but also prone to stress concentration at the weld due to factors such as differences in pipe material and insufficient precision of welding equipment. This reduces the strength of the pipe connection and can easily lead to cracking and leakage at the connection after long-term use, seriously affecting the normal operation and service life of the pipeline system. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an enhanced PSP pipe that offers better ease of connection and operation, as well as relatively higher connection reliability.

[0006] An enhanced PSP pipe comprises, from the inside out, an inner tube, a metal tube layer, a continuous fiber-wound reinforcing layer, and an outer layer; both the inner tube and the outer layer are made of thermoplastic materials; the continuous fiber-wound reinforcing layer is formed by continuously wound fibers in an alternating spiral pattern; the ends or outer surface of the enhanced PSP pipe are provided with parallel grooves or threaded grooves for installing metal clamps or metal crimping connection components; the inner tube, the metal tube layer, the continuous fiber-wound reinforcing layer, and the outer layer are integrally bonded together by thermoplastic hot-melt bonding.

[0007] Preferably, the thickness of the inner tube is 1 mm to 5 mm;

[0008] And / or, the thickness of the metal tube layer is 0.5 mm to 10 mm;

[0009] And / or, the thickness of the continuous fiber winding reinforcement layer is from 0.5 mm to 100 mm;

[0010] And / or, the thickness of the outer layer is 1 mm to 5 mm.

[0011] Preferably, the diameter of the pipe ranges from 20 mm to 2000 mm; the thermoplastic material includes PE, PP, PA or PVC, and the continuous fiber includes glass fiber, basalt fiber, aramid fiber or carbon fiber.

[0012] Preferably, the parallel grooves or threaded grooves are distributed at equal intervals along the pipe axis, and the groove depth is 0.5mm to 5mm.

[0013] Preferably, the end or outer surface of the enhanced PSP pipe is provided with parallel grooves or threaded grooves for mounting metal clamps or metal crimping connection components; the metal clamps or metal crimping connection components are used in conjunction with sealing gaskets for sealing connection.

[0014] Preferably, the cross-section of the parallel groove or threaded groove is trapezoidal, and the inner wall of the groove is provided with an elastic sealing layer of 0.1-0.5mm thickness, which is in close contact with the inner wall of the metal clamp or metal snap-fit ​​connection component.

[0015] Preferably, the continuous fiber winding reinforcement layer is made of a mixture of glass fiber and basalt fiber, and the winding angle alternates between 45° and 60°.

[0016] Preferably, the metal tube layer is provided with a plurality of through holes, and the continuous fiber passes through the through holes and is thermally interwoven with the thermoplastic of the inner tube and the outer layer to enhance the connection strength between the layers.

[0017] Preferably, the inner wall of the metal tube layer is provided with axially extending ridges, which are embedded in the thermoplastic material of the inner tube, and the height of the ridges is 1 / 3 to 1 / 2 of the thickness of the metal tube layer.

[0018] Preferably, the inner surface of the metal clamp or metal snap-fit ​​connection component is provided with an annular protrusion that matches the groove. The cross-section of the annular protrusion is arc-shaped, and the height of the protrusion is 0.2-0.3 mm less than the depth of the groove. The outer surface of the outer layer is coated with a 0.1-0.3 mm thick graphene-modified wear-resistant layer, and the wear-resistant layer is bonded to the outer layer by a co-extrusion molding process.

[0019] The enhanced PSP pipe provided in this application comprises, from the inside out, an inner pipe, a metal pipe layer, a continuous fiber-wound reinforcing layer, and an outer layer. Each layer is bonded together using thermoplastic hot-melt adhesive, ensuring a tight bond between different material layers, preventing interlayer separation, and improving overall structural stability. The continuous fiber is wound in an alternating spiral pattern to form the reinforcing layer, enhancing the pipe's stress performance in all directions, improving ring stiffness and impact resistance. The metal pipe layer further enhances the pipe's pressure-bearing capacity and rigidity. The inner and outer pipe layers are made of thermoplastic materials, possessing good corrosion resistance and flexibility, adapting to different transport media and environments. Parallel grooves are present at the pipe ends or on the outer surface. The use of threaded grooves in conjunction with metal clamps or metal crimping connection components changes the traditional hot-melt welding connection method. It eliminates the need for complex equipment and advanced operating skills, making the connection operation more convenient and enabling quick pipe docking. At the same time, the tight fit between the groove structure and the metal connection components, combined with the stable hot-melt bonding between each layer, makes the connection less prone to loosening or leakage, resulting in relatively good connection reliability. Compared with the existing injection-molded joint connection technology CN222392180U, it does not require an additional injection-molded joint body, and can achieve reliable connection through its own structure, reducing costs and avoiding connection problems caused by differences in joint and pipe materials. Overall, it improves the comprehensive performance and applicability of the pipeline. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of an enhanced PSP pipe according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of an enhanced PSP pipe according to an embodiment of the present invention from another angle;

[0022] Figure 3 for Figure 2 Enlarged view at point A;

[0023] Figure 4 A schematic diagram of the structure of an enhanced PSP pipe from another angle according to an embodiment of the present invention;

[0024] Figure 5 for Figure 5 Enlarged view at point B;

[0025] Reference numerals: 10-inner tube; 20-metal tube layer; 30-continuous fiber winding reinforcement layer; 40-outer layer; 50-threaded groove; 60-metal crimp connection component; 61-ring body; 62-connecting ear plate; 63-reinforcing rib plate connection. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This application provides an enhanced PSP pipeline. In one embodiment, please refer to [link to embodiment]. Figures 1 to 4 The reinforced PSP pipe comprises, from the inside out, an inner tube 10, a metal tube layer 20, a continuous fiber-wound reinforcing layer 30, and an outer layer 40. The inner tube 10 and the outer layer 40 are both made of thermoplastic materials. The continuous fiber-wound reinforcing layer is formed by continuously winding fibers in an alternating spiral direction. The ends or outer surfaces of the reinforced PSP pipe are provided with parallel grooves or threaded grooves 50 for installing metal clamps or metal crimping connection components 60. The inner tube 10, the metal tube layer 20, the continuous fiber-wound reinforcing layer 30, and the outer layer 40 are bonded together by thermoplastic hot-melt bonding.

[0028] The enhanced PSP pipe provided in this application comprises, from the inside out, an inner pipe, a metal pipe layer, a continuous fiber-wound reinforcing layer, and an outer layer. Each layer is bonded together using thermoplastic hot-melt adhesive, ensuring a tight bond between different material layers, preventing interlayer separation, and improving overall structural stability. The continuous fiber is wound in an alternating spiral pattern to form the reinforcing layer, enhancing the pipe's stress performance in all directions, improving ring stiffness and impact resistance. The metal pipe layer further enhances the pipe's pressure-bearing capacity and rigidity. The inner and outer pipe layers are made of thermoplastic materials, possessing good corrosion resistance and flexibility, adapting to different transport media and environments. Parallel grooves are present at the pipe ends or on the outer surface. The use of threaded grooves in conjunction with metal clamps or metal crimping connection components changes the traditional hot-melt welding connection method. It eliminates the need for complex equipment and advanced operating skills, making the connection operation more convenient and enabling quick pipe docking. At the same time, the tight fit between the groove structure and the metal connection components, combined with the stable hot-melt bonding between each layer, makes the connection less prone to loosening or leakage, resulting in relatively good connection reliability. Compared with the existing injection-molded joint connection technology CN222392180U, it does not require an additional injection-molded joint body, and can achieve reliable connection through its own structure, reducing costs and avoiding connection problems caused by differences in joint and pipe materials. Overall, it improves the comprehensive performance and applicability of the pipeline.

[0029] In one embodiment, the thickness of the inner tube is 1 mm to 5 mm; for example, the thickness of the metal tube layer is 0.5 mm to 10 mm; for example, the thickness of the continuous fiber winding reinforcement layer is 0.5 mm to 100 mm; for example, the thickness of the outer layer is 1 mm to 5 mm. Thus, by employing such a range of layer thicknesses, the inner tube ensures smooth transport while having a suitable thickness to resist internal pressure; the metal tube layer thickness is adaptable, enhancing pressure-bearing rigidity without excessively increasing weight and cost; the thickness of the continuous fiber reinforcement layer can be flexibly adjusted to meet the reinforcement requirements of different pressure levels; the outer layer thickness ensures both protection and economy; and the matching of layer thicknesses achieves a balanced optimization of performance and cost.

[0030] In one embodiment, the diameter of the pipe ranges from 20mm to 2000mm, thus adapting to diverse pipe diameter requirements from small equipment to large-scale municipal engineering projects. For example, the thermoplastic material includes PE, PP, PA, or PVC, and the continuous fiber includes glass fiber, basalt fiber, aramid fiber, or carbon fiber. This wide range of thermoplastic materials (PE, PP, etc.) and continuous fibers (glass fiber, etc.) allows for flexible material selection based on the transported medium (e.g., highly corrosive, high-temperature) and operating conditions (high pressure, high abrasion, etc.), broadening application scenarios and improving adaptability to different environments. For example, the parallel grooves or threaded grooves are evenly distributed along the pipe axis, with a groove depth of 0.5mm to 5mm. This evenly distributed groove depth of 0.5-5mm ensures uniform stress distribution on the metal connection components, preventing localized stress concentration that could lead to connection failure. The 0.5-5mm depth provides sufficient locking strength without excessively weakening the pipe body strength, ensuring connection reliability and the overall mechanical performance of the pipe.

[0031] In one embodiment, the end or outer surface of the enhanced PSP pipe is provided with parallel grooves or threaded grooves for installing metal clamps or metal crimping connection components; the metal clamps or metal crimping connection components work with sealing gaskets to form a sealed connection. In this way, the metal connection components, together with the sealing gaskets, further enhance the sealing effect on the basis of the groove connection, fill the tiny gaps that may exist between the connection components and the grooves, effectively prevent leakage of the transported medium, improve the sealing performance of the pipeline system, and are suitable for scenarios with strict leakage requirements (such as gas transportation, chemical fluids, etc.).

[0032] In one embodiment, the cross-section of the parallel groove or threaded groove is trapezoidal, and the inner wall of the groove is provided with an elastic sealing layer of 0.1-0.5mm thickness. The elastic sealing layer is tightly fitted to the inner wall of the metal clamp or metal crimping connection component. In this way, the trapezoidal groove cross-section increases the contact area, and the elastic sealing layer can adaptively compensate for the installation error of the connection component and the groove, as well as the thermal expansion and contraction deformation of the pipeline, and maintain a tight fit. Even under vibration and pressure fluctuation conditions, it can maintain a stable seal, significantly improving the reliability and durability of the connection seal.

[0033] In one embodiment, the continuous fiber-wound reinforcement layer is made of a mixture of glass fiber and basalt fiber, with the winding angle alternating between 45° and 60°. This mixed winding of glass fiber and basalt fiber combines the advantages of both: the low cost of glass fiber and the superior temperature and corrosion resistance of basalt fiber. The alternating winding angle of 45°-60° optimizes the direction of fiber stress, resulting in a more balanced axial and circumferential mechanical property of the reinforcement layer. This improves the pipe's resistance to bending and torsion, and enhances its performance under complex stress conditions.

[0034] In one embodiment, the metal tube layer is provided with multiple through holes. The continuous fibers pass through the through holes and are thermally fused and interwoven with the thermoplastic of the inner tube and the outer tube to enhance the connection strength between the layers. In this way, the through holes of the metal tube layer allow the continuous fibers to be inserted and thermally fused and interwoven with the thermoplastic materials of the inner and outer layers to construct a three-dimensional connection structure. This breaks through the limitations of traditional simple thermal fusion bonding between layers, greatly enhances the interlayer interlocking force and the ability to withstand forces, prevents interlayer slippage and separation, and improves the overall structural strength and stability of the pipeline.

[0035] In one embodiment, the inner wall of the metal tube layer is provided with axially extending ridges. The ridges are embedded in the thermoplastic material of the inner tube, and the height of the ridges is 1 / 3 to 1 / 2 of the thickness of the metal tube layer. In this way, the ridges on the inner side of the metal tube layer are embedded in the inner tube, forming a dual interlayer connection of mechanical interlocking and hot-melt bonding. Compared with simple hot-melt bonding, the torque resistance and peel resistance are stronger. The height of the ridges is 1 / 3 to 1 / 2 of the thickness of the metal tube layer, which ensures sufficient interlocking force and avoids excessive weakening of the strength of the metal tube layer itself, thereby enhancing the reliability of the connection between the inner tube and the metal tube layer.

[0036] In one embodiment, the inner surface of the metal clamp or metal crimping connection component is provided with an annular protrusion that matches the groove. The cross-section of the annular protrusion is arc-shaped, and the height of the protrusion is 0.2-0.3 mm less than the depth of the groove. The outer surface of the outer layer is coated with a 0.1-0.3 mm thick graphene-modified wear-resistant layer, which is bonded to the outer layer through a co-extrusion molding process. Thus, when the annular protrusion of the connection component adopts an arc-shaped cross-section and a height difference of 0.2-0.3 mm, it adapts to the groove while reserving space for minor deformation, buffering the stress caused by thermal expansion and contraction and vibration of the pipeline, and protecting the connection structure. The outer graphene-modified wear-resistant layer significantly improves the wear resistance of the pipeline's outer surface, especially in scenarios such as underground burial and frequent transportation, reducing the risk of outer layer wear and damage, and extending the overall service life of the pipeline.

[0037] In one embodiment, please refer to Figure 4 and Figure 5 The metal crimping connection component 60 is a flange, which includes an annular body 61 adapted to the parallel groove or threaded groove 50. The inner side of the annular body 61 is provided with a protruding rib that engages with the groove 50, and the annular body 61 is circumferentially distributed with connecting ear plates 62 for installing fasteners. The connecting ear plates 62 and the annular body 61 are connected by a reinforcing rib plate 63 to improve the structural strength of the connection component. The fasteners are nut and stud fasteners.

[0038] The enhanced PSP pipe provided in this application comprises, from the inside out, an inner pipe, a metal pipe layer, a continuous fiber-wound reinforcing layer, and an outer layer. Each layer is bonded together using thermoplastic hot-melt adhesive, ensuring a tight bond between different material layers, preventing interlayer separation, and improving overall structural stability. The continuous fiber is wound in an alternating spiral pattern to form the reinforcing layer, enhancing the pipe's stress performance in all directions, improving ring stiffness and impact resistance. The metal pipe layer further enhances the pipe's pressure-bearing capacity and rigidity. The inner and outer pipe layers are made of thermoplastic materials, possessing good corrosion resistance and flexibility, adapting to different transport media and environments. Parallel grooves are present at the pipe ends or on the outer surface. The use of threaded grooves in conjunction with metal clamps or metal crimping connection components changes the traditional hot-melt welding connection method. It eliminates the need for complex equipment and advanced operating skills, making the connection operation more convenient and enabling quick pipe docking. At the same time, the tight fit between the groove structure and the metal connection components, combined with the stable hot-melt bonding between each layer, makes the connection less prone to loosening or leakage, resulting in relatively good connection reliability. Compared with the existing injection-molded joint connection technology CN222392180U, it does not require an additional injection-molded joint body, and can achieve reliable connection through its own structure, reducing costs and avoiding connection problems caused by differences in joint and pipe materials. Overall, it improves the comprehensive performance and applicability of the pipeline.

[0039] In the description of the embodiments of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0040] In the description of the embodiments of this utility model, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the embodiments of this utility model, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. In the description of the embodiments of this utility model, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B. In the description of the embodiments of this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. In addition, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An enhanced PSP pipe, characterized in that, From the inside out, it consists of an inner tube, a metal tube layer, a continuous fiber-wound reinforcement layer, and an outer layer; Both the inner tube and the outer tube are made of thermoplastic materials; The continuous fiber winding reinforcement layer is formed by winding continuous fibers in an alternating spiral direction; The ends or outer surfaces of the enhanced PSP pipe are provided with parallel grooves or threaded grooves for installing metal clamps or metal crimping connection components. The inner tube, metal tube layer, continuous fiber winding reinforcement layer and outer layer are bonded together by thermoplastic hot melt bonding.

2. The enhanced PSP pipe according to claim 1, characterized in that, The thickness of the inner tube is 1 mm to 5 mm; And / or, the thickness of the metal tube layer is 0.5 mm to 10 mm; And / or, the thickness of the continuous fiber winding reinforcement layer is from 0.5 mm to 100 mm; And / or, the thickness of the outer layer is 1 mm to 5 mm.

3. The enhanced PSP pipe according to claim 1, characterized in that, The diameter of the pipe ranges from 20 mm to 2000 mm; the thermoplastic material includes PE, PP, PA or PVC, and the continuous fiber includes glass fiber, basalt fiber, aramid fiber or carbon fiber.

4. The enhanced PSP pipe according to claim 1, characterized in that, The parallel grooves or threaded grooves are distributed at equal intervals along the pipe axis, and the groove depth is 0.5mm to 5mm.

5. The enhanced PSP pipe according to claim 1, characterized in that, The enhanced PSP pipe has parallel grooves or threaded grooves on its ends or outer surface for mounting metal clamps or metal crimping connections; the metal clamps or metal crimping connections work in conjunction with sealing gaskets for a sealed connection.

6. The enhanced PSP pipe according to claim 5, characterized in that, The parallel groove or threaded groove has a trapezoidal cross-section, and the inner wall of the groove is provided with an elastic sealing layer of 0.1-0.5mm thickness. The elastic sealing layer is tightly fitted to the inner wall of the metal clamp or metal snap-fit ​​connection component.

7. The enhanced PSP pipe according to claim 6, characterized in that, The continuous fiber winding reinforcement layer is made of a mixture of glass fiber and basalt fiber, and the winding angle alternates between 45° and 60°.

8. The enhanced PSP pipe according to claim 7, characterized in that, The metal tube layer has multiple through holes, through which the continuous fibers pass and interweave with the thermoplastic of the inner tube and the outer layer to enhance the connection strength between the layers.

9. The enhanced PSP pipe according to claim 8, characterized in that, The inner wall of the metal tube layer is provided with axially extending ridges, which are embedded in the thermoplastic material of the inner tube, and the height of the ridges is 1 / 3 to 1 / 2 of the thickness of the metal tube layer.

10. The enhanced PSP pipe according to claim 9, characterized in that, The inner surface of the metal clamp or metal snap-fit ​​connection component is provided with an annular protrusion that matches the groove. The cross-section of the annular protrusion is arc-shaped, and the height of the protrusion is 0.2-0.3 mm less than the depth of the groove. The outer surface of the outer layer is coated with a graphene-modified wear-resistant layer with a thickness of 0.1-0.3 mm.

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