A high-pressure resistant composite pipe structure

Abstract

This utility model discloses a high-pressure resistant composite pipe structure, relating to the field of composite pipe technology. It addresses the problem that while existing composite pipes achieve torsional resistance and circumferential strength, they are prone to delamination due to insufficient bonding strength under long-term high-pressure environments, and also exhibit poor impact resistance. The inner lining layer has a composite reinforcement layer on its outer side. Multiple carbon fiber pressure-bearing rings are fixedly connected at equal intervals to the outer side of the composite reinforcement layer. A bonding layer is shared by the composite reinforcement layer and the multiple carbon fiber pressure-bearing rings. An aluminum alloy metal tube is sleeved around the bonding layer, and a protective buffer composite layer is provided on the outer side of the aluminum alloy metal tube. Through the synergistic design of the composite reinforcement layer and the carbon fiber pressure-bearing rings, the composite mesh structure formed by the interweaving of stainless steel wire and aramid fiber effectively disperses stress. Combined with the equally spaced carbon fiber pressure-bearing rings, the pipe exhibits excellent deformation resistance and long-term stability under high-pressure environments.

Description

Technical Field

[0001] This utility model relates to the field of composite pipeline technology, specifically a high-pressure resistant composite pipeline structure. Background Technology

[0002] Composite pipelines are multifunctional pipeline systems composed of multiple materials or structural layers. By integrating the physical and chemical properties of different materials, they achieve comprehensive performance improvements such as corrosion resistance, high strength, and lightweight. They are widely used in petroleum, chemical, municipal water supply and drainage, and marine engineering fields.

[0003] For example, according to authorization announcement number CN219102263U, a braided composite pipe structure includes a base pipe layer and a reinforcing layer covering the surface of the pipe layer. The reinforcing layer includes a parallel reinforcing layer in the middle and a braided reinforcing layer on the outer side. The pipe layer is made of polymer plastic material, and both the parallel and braided reinforcing layers are made of filamentous carbon fiber material. The parallel reinforcing layer is attached to the surface of the pipe layer by pultrusion, and the braided reinforcing layer is attached to the surface of the pipe layer by weaving and local heating. The surface of the carbon fiber material in the braided reinforcing layer is coated with epoxy resin. In this structure, the parallel reinforcing layer provides axial stiffness, the braided reinforcing layer provides torsional resistance and circumferential strength, and the epoxy resin in the middle enhances the bonding force, thereby obtaining a high-performance composite pipe structure.

[0004] While the composite pipes mentioned above achieve torsional resistance and circumferential strength, they are prone to delamination due to insufficient bonding strength in high-pressure environments over long periods of time, and also have poor impact resistance. Therefore, there is an urgent need in the market to develop a high-pressure resistant composite pipe structure to help people solve existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a high-pressure resistant composite pipe structure to solve the problems mentioned in the background art. Although the composite pipes in the prior art have achieved torsional resistance and circumferential strength, they are prone to delamination due to insufficient bonding force in a high-pressure environment over a long period of time, and their impact resistance is also poor.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure resistant composite pipe structure, including an inner lining layer, a composite reinforcement layer provided on the outer side of the inner lining layer, multiple carbon fiber pressure-bearing rings fixedly connected at equal intervals on the outer side of the composite reinforcement layer, a bonding layer provided on the outer side of the composite reinforcement layer and the multiple carbon fiber pressure-bearing rings, an aluminum alloy metal pipe sleeved on the outer side of the bonding layer, and a protective buffer composite layer provided on the outer side of the aluminum alloy metal pipe.

[0007] Preferably, the inner lining layer is made of polytetrafluoroethylene, and the composite reinforcement layer includes a first metal braided layer and a textile fiber layer. The first metal braided layer and the textile fiber layer are interwoven to form a composite mesh structure, and the first metal braided layer and the textile fiber layer are simultaneously wrapped around the outside of the inner lining layer through weaving.

[0008] Preferably, the first metal braided layer is made of stainless steel wire, and the textile fiber layer is made of aramid fiber.

[0009] Preferably, the carbon fiber bearing ring and the composite reinforcement layer are bonded together with epoxy resin and cured at high temperature.

[0010] Preferably, the bonding layer is made of modified polyolefin material. The bonding layer is extruded and placed on the outside of the composite reinforcement layer and multiple carbon fiber bearing rings, and simultaneously bonded with epoxy resin and cured at high temperature. The aluminum alloy metal tube is bonded to the bonding layer with epoxy resin and cured at high temperature.

[0011] Preferably, the protective buffer composite layer includes a buffer layer and a protective layer. The buffer layer is made of foamed polyurethane material, and the buffer layer is bonded to the aluminum alloy metal tube with epoxy resin and cured at high temperature.

[0012] Preferably, the protective layer is made of high-density polyethylene (HDPE) material, and the protective layer and the buffer layer are bonded together with epoxy resin and cured at high temperature.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the circumferential strength and axial stiffness of the pipeline are significantly improved by the synergistic design of the composite reinforcement layer and the carbon fiber pressure ring. The composite mesh structure formed by the interlacing of stainless steel wire and aramid fiber effectively disperses the stress. Combined with the equally spaced carbon fiber pressure ring, the pipeline has excellent anti-deformation ability and long-term stability under high pressure environment, which solves the problem of easy delamination in the prior art.

[0015] (2) In this utility model, a modified polyolefin bonding layer and an epoxy resin high-temperature curing process are used to achieve strong adhesion between metal and non-metal materials. The extrusion molding process ensures tight bonding between the layers, effectively buffering the thermal expansion differences of different materials, and greatly improving the interlayer bonding force and the reliability of the overall structure.

[0016] (3) In this utility model, a protective buffer composite layer is innovatively designed, which is composed of a foamed polyurethane buffer layer and a high-density polyethylene protective layer. It can not only effectively absorb external impact energy, but also has excellent wear resistance and weather resistance, which significantly improves the impact resistance and service life of the pipeline in complex environments. Attached Figure Description

[0017] Figure 1 This is a front view of a high-pressure resistant composite pipeline structure according to this utility model;

[0018] Figure 2 This is a side sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the composite reinforcement layer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the protective buffer composite layer structure of this utility model.

[0021] In the figure: 1. Inner lining layer; 2. Composite reinforcement layer; 201. First metal braided layer; 202. Textile fiber layer; 3. Carbon fiber pressure ring; 4. Bonding layer; 5. Aluminum alloy metal tube; 6. Protective buffer composite layer; 601. Buffer layer; 602. Protective layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a high-pressure resistant composite pipe structure, comprising an inner lining layer 1 made of polytetrafluoroethylene (PTFE). PTFE has excellent chemical inertness, can withstand corrosion from strong acids, strong alkalis, and organic solvents, and also possesses an extremely low coefficient of friction, effectively reducing fluid resistance. A composite reinforcement layer 2 is provided on the outer side of the inner lining layer 1. The composite reinforcement layer 2 includes a first metal braided layer 201 and a textile fiber layer 202, which are interwoven to form a composite mesh structure. The first metal braided layer 201 and the textile fiber layer 202 are simultaneously woven and wrapped around the outer side of the inner lining layer 1. The first metal braided layer 201 is made of stainless steel wire, and the textile fiber layer 202... 2. The composite reinforcement layer 2 is made of aramid fiber, while stainless steel wire provides high strength and fatigue resistance, enhancing the radial pressure resistance of the pipeline. Aramid fiber, on the other hand, has high modulus and impact resistance, reducing weight and improving tensile strength. The two are interwoven to form a composite mesh structure, synergistically enhancing the overall mechanical properties, bearing the main structural strength of the pipeline, resisting internal fluid pressure, and dispersing stress through the mesh structure to prevent local deformation or rupture, ensuring the stability of the pipeline under high pressure. Multiple carbon fiber pressure-bearing rings 3 are fixedly connected at equal intervals on the outer side of the composite reinforcement layer 2. The carbon fiber pressure-bearing rings 3 are bonded to the composite reinforcement layer 2 with epoxy resin and cured at high temperature. Through the creep-resistant properties of the carbon fiber pressure-bearing rings 3, the circumferential stress is evenly distributed, suppressing the radial expansion of the pipeline.

[0024] A bonding layer 4 is provided on the outside of the composite reinforcement layer 2 and multiple carbon fiber pressure bearing rings 3. The bonding layer 4 is made of modified polyolefin and is applied to the outside of the composite reinforcement layer 2 and multiple carbon fiber pressure bearing rings 3 by extrusion. Simultaneously, epoxy resin is used for bonding and high-temperature curing. The aluminum alloy metal pipe 5 is bonded to the bonding layer 4 with epoxy resin and cured at high temperature. Modified polyolefin has excellent bonding properties, can bond well with both metal and non-metal materials, and is resistant to chemical corrosion and has good insulation properties. Its function is to tightly bond the composite reinforcement layer 2 and the aluminum alloy metal pipe 5 through the extrusion process, ensuring no slippage between layers and buffering the stress caused by the difference in thermal expansion coefficients of different materials, thus enhancing the stability of the overall structure. The aluminum alloy metal pipe 5 is fitted outside the bonding layer 4, providing rigid support to resist external mechanical impacts and sharing the load with the internal composite reinforcement layer 2, ensuring the structural integrity of the pipeline under complex working conditions.

[0025] A protective buffer composite layer 6 is installed on the outside of the aluminum alloy metal pipe 5. The protective buffer composite layer 6 includes a buffer layer 601 and a protective layer 602. The buffer layer 601 is made of foamed polyurethane and is bonded to the aluminum alloy metal pipe 5 with epoxy resin and cured at high temperature. The protective layer 602 is made of high-density polyethylene (HDPE) and is bonded to the buffer layer 601 with epoxy resin and cured at high temperature. The foamed polyurethane buffer layer has a porous structure, which can effectively absorb impact energy and provide heat insulation, shock absorption, and adaptability to temperature changes. The high-density polyethylene protective layer has wear resistance, UV aging resistance, and waterproof and moisture-proof properties. The protective buffer composite layer 6 mitigates damage to the pipeline from external impacts or vibrations, and as the outermost layer of protection, it resists soil stress, friction, and the effects of climate, extending the service life of the pipeline.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high pressure resistant composite pipe structure comprising an inner liner (1), characterized in that: The inner lining layer (1) is provided with a composite reinforcement layer (2) on the outside. Multiple carbon fiber pressure rings (3) are fixedly connected at equal intervals on the outside of the composite reinforcement layer (2). A bonding layer (4) is provided on the outside of the composite reinforcement layer (2) and the multiple carbon fiber pressure rings (3). An aluminum alloy metal tube (5) is sleeved on the outside of the bonding layer (4). A protective buffer composite layer (6) is provided on the outside of the aluminum alloy metal tube (5).

2. A high pressure resistant composite pipe structure according to claim 1, characterized in that: The inner lining layer (1) is made of polytetrafluoroethylene. The composite reinforcement layer (2) includes a first metal braided layer (201) and a textile fiber layer (202). The first metal braided layer (201) and the textile fiber layer (202) are interwoven to form a composite mesh structure. The first metal braided layer (201) and the textile fiber layer (202) are simultaneously wrapped around the outside of the inner lining layer (1) through weaving.

3. A high pressure resistant composite pipe structure according to claim 2, characterized in that: The first metal braided layer (201) is made of stainless steel wire, and the textile fiber layer (202) is made of aramid fiber.

4. The high pressure resistant composite pipe structure of claim 1, wherein: The carbon fiber bearing ring (3) and the composite reinforcement layer (2) are bonded together with epoxy resin and cured at high temperature.

5. The high pressure resistant composite pipe structure of claim 1, wherein: The bonding layer (4) is made of modified polyolefin material. The bonding layer (4) is extruded and placed on the outside of the composite reinforcement layer (2) and multiple carbon fiber pressure rings (3) and simultaneously bonded with epoxy resin and cured at high temperature. The aluminum alloy metal tube (5) is bonded with epoxy resin and cured at high temperature.

6. A high pressure resistant composite pipe structure according to claim 1, characterized in that: The protective buffer composite layer (6) includes a buffer layer (601) and a protective layer (602). The buffer layer (601) is made of foamed polyurethane material. The buffer layer (601) is bonded to the aluminum alloy metal tube (5) with epoxy resin and cured at high temperature.

7. A high pressure resistant composite pipe structure according to claim 6, characterized in that: The protective layer (602) is made of high-density polyethylene material, and the protective layer (602) and the buffer layer (601) are bonded together with epoxy resin and cured at high temperature.

Images