Reinforced composite pipe with external pressure resisting function

Abstract

The utility model belongs to the technical field of composite pipes, and mainly relates to a reinforced composite pipe with an external pressure resisting function, which comprises a base pipe, a first cavity is arranged on the inner side of the base pipe in a surrounding manner, and a framework layer and an outer pipe layer arranged on the outer surface of the framework layer are sequentially arranged on the surface, far away from the first cavity, of the base pipe along the thickness direction of the base pipe. The framework layer and the outer pipe layer are both made of resin materials. A first framework and a second framework parallel to the first framework are arranged in the framework layer, and the first framework and the second framework are wound in the axial direction of the first cavity correspondingly. And meanwhile, the composite pipe cannot be damaged due to resilience force of the framework structure when the composite pipe is subjected to external pressure.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite pipes, and in particular relates to a reinforced composite pipe with the function of resisting external pressure. Background Art

[0002] Composite pipes are widely used in the fields of oil, natural gas, chemical industry, electric power, mining, etc. Due to their good corrosion resistance, light weight and excellent mechanical properties, they have become an indispensable material choice in many industrial and civil engineering projects. Especially in extreme environments, such as high temperature, high pressure and corrosive media, the excellent performance of composite pipes can effectively ensure the safety and stability of the transported media, significantly reducing equipment failure rate and maintenance costs.

[0003] In the prior art, in order to improve the compressive resistance of composite pipes, many designers and engineers usually add some compressive materials, such as polymer resin materials (materials with a certain compression ratio) into the composite pipes. However, although this method can enhance the compressive resistance of the composite pipe to a certain extent, the above improvement is more to relieve the pressure inside the pipe cavity. When external force acts on the composite pipe, its external structure cannot effectively disperse the force, thereby failing to avoid external damage to the pipe.

[0004] Therefore, it is urgent to improve the existing composite pipes to solve the limitations of the existing technology. Utility Model Content

[0005] The utility model aims to provide a composite pipe structure which can simultaneously alleviate the internal and external forces acting on the composite pipe in view of the deficiencies of the prior art.

[0006] In order to achieve the above technical objectives, this application implements the following technical solutions:

[0007] A reinforced composite pipe with external pressure resistance function comprises a base pipe, wherein a first cavity is arranged around the inner side of the base pipe, wherein along the thickness direction of the base pipe, a skeleton layer and an outer tube layer arranged on the outer surface of the skeleton layer are arranged in sequence on the surface of the base pipe away from the first cavity, and both the skeleton layer and the outer tube layer are made of resin material; a first skeleton and a second skeleton arranged parallel to the first skeleton are arranged in the skeleton layer, and the first skeleton and the second skeleton are respectively wound along the axial direction of the first cavity.

[0008] The above technical solution produces the following technical effects:

[0009] By arranging the first skeleton and the second skeleton in the skeleton layer and winding them along the axial direction of the first cavity, the internal and external pressure resistance of the composite pipe can be significantly improved. At the same time, due to the parallel design of the first skeleton and the second skeleton, they can support each other when subjected to external force, thereby effectively dispersing stress, reducing local stress concentration, and avoiding material fatigue damage caused by stress concentration.

[0010] As a further improvement to the reinforced composite pipe with the function of resisting external pressure of the utility model, the spiral direction of the winding of the first skeleton is different from the spiral direction of the winding of the second skeleton.

[0011] As a further improvement of the reinforced composite pipe with external pressure resistance function of the utility model, the pitch of the first skeleton is D1, and the pitch of the second skeleton is D2, wherein the value range of D1 is: 2mm-10mm; the value range of D2 is: 2mm-10mm.

[0012] As a further improvement to the reinforced composite pipe with the function of resisting external pressure of the utility model, D1 and D2 satisfy D1<D2.

[0013] As a further improvement of the reinforced composite pipe with external pressure resistance function of the utility model, along the length direction of the first skeleton, the pitch of the first skeleton gradually increases and then gradually decreases, wherein the pitch of the first skeleton corresponding to the center of the first skeleton is the maximum value;

[0014] And / or along the length direction of the second skeleton, the pitch of the second skeleton presents a trend of gradually increasing and then gradually decreasing, wherein the pitch of the second skeleton corresponding to the center of the second skeleton is the maximum value.

[0015] As a further improvement to the reinforced composite pipe with external pressure resistance function of the utility model, the thickness of the first skeleton is H1, the thickness of the second skeleton is H2, and H1 and H2 satisfy that H1 is less than H2.

[0016] As a further improvement of the reinforced composite pipe with external pressure resistance function of the utility model, along the length direction of the first skeleton, the thickness of the first skeleton increases first and then decreases, and the thickness of the first skeleton corresponding to the center of the first skeleton is the maximum value;

[0017] And / or, along the length direction of the second skeleton, the thickness of the second skeleton increases first and then decreases, and the thickness of the second skeleton corresponding to the center of the second skeleton is the maximum value.

[0018] As a further improvement to the reinforced composite pipe with external pressure resistance function of the utility model, the first frame and the second frame are both made of metal, and the cross-sections of the first frame and the second frame are any one of circular, elliptical and hexagonal.

[0019] As a further improvement to the reinforced composite pipe with the function of resisting external pressure of the utility model, the interiors of the first skeleton and the second skeleton are both hollow structures.

[0020] As a further improvement of the reinforced composite pipe with external pressure resistance function of the utility model, a reinforcement layer is provided between the skeleton layer and the outer tube layer, and the reinforcement layer is composed of multiple glass fiber layers and a resin layer formed by impregnating resin between the fiber layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part 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 on the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of implementation mode 1 of the present utility model;

[0023] Figure 2 It is a cross-sectional view of the composite pipe in Embodiment 1 of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of the first skeleton in implementation mode 3 of the present utility model;

[0025] Figure 4 This is a schematic structural diagram of the second skeleton in implementation mode 3 of the present utility model;

[0026] in:

[0027] 1-base tube;

[0028] 11- first cavity;

[0029] 2- skeleton layer;

[0030] 21- first skeleton;

[0031] 22 - second skeleton;

[0032] 3-Outer tube layer;

[0033] 4- Enhancement layer. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the claims. Any technical personnel in this field may make several possible changes and modifications without departing from the concept of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

[0037] The present invention will be described in further detail below in conjunction with specific implementation methods, but the embodiments of the present invention are not limited thereto.

[0038] Implementation Method 1

[0039] like Figure 1-2 As shown, the present applicant has found that in order to solve the problem that the composite pipe has a weak ability to relieve external forces in harsh environments, the prior art often simply relies on materials with a certain compression ratio to relieve the pressure on the composite pipe. However, the above design does not take into account that if the composite pipe is subjected to external forces, a single pressure-relieving coating cannot relieve the force, because the outer wall of the composite pipe will directly bear the pressure, and the coating cannot provide sufficient support to disperse the external force.

[0040] Therefore, the present application proposes a design of a reinforced composite pipe, including a base pipe 1, wherein a first cavity 11 is arranged around the inner side of the base pipe 1, wherein, along the thickness direction of the base pipe 1, a skeleton layer 2 and an outer tube layer 3 arranged on the outer surface of the skeleton layer 2 are sequentially arranged on the surface of the base pipe 1 away from the first cavity 11, and both the skeleton layer 2 and the outer tube layer 3 are made of resin material; a first skeleton 21 and a second skeleton 22 arranged parallel to the first skeleton 21 are arranged in the skeleton layer 2, and these skeletons are wound along the axial direction of the composite pipe, thereby forming a solid support structure inside the composite pipe.

[0041] Specifically, the present application adopts a double-layer skeleton layer 2, which can, on the one hand, drive the skeleton layer 2 through the first skeleton 21 to relieve the pressure generated in the first cavity 11 of the base pipe 1, and on the other hand, the second skeleton 22 drives the skeleton layer 2 to relieve the external pressure. At the same time, due to the design of the double-layer skeleton of the present application, when the internal force acts on the composite pipe, the second skeleton 22 away from the base pipe 1 can further alleviate the bending of the first skeleton 21 to relieve the internal force; when the external force acts on the composite pipe, the skeleton away from the outer layer pipe (the first skeleton 21) can alleviate the bending of the second skeleton 22. As a result, the present application further reduces the bending of the skeleton layer 2 and alleviates the bending of the composite pipe of the present application, avoiding damage to the pipe material other than the skeleton layer 2 due to direct force.

[0042] Furthermore, the spiral direction of the first skeleton 21 is different from the spiral direction of the second skeleton 22. With this design, when the composite pipe is subjected to torsional force, the spiral skeletons in different directions can offset part of the torsional force, thereby improving the overall torsion resistance of the composite pipe. In addition, the winding spacing between the first skeleton 21 and the second skeleton 22 can also be adjusted according to actual needs to achieve the best mechanical balance. In a specific embodiment, the material of the first skeleton 21 and the second skeleton 22 can be a high-strength metal material, such as stainless steel, titanium alloy, etc., or a high-performance composite material, such as carbon fiber reinforced plastic, etc. The selection of these materials depends on the application environment and performance requirements of the composite pipe. For example, in deep-sea applications, it may be necessary to select a material with stronger corrosion resistance, while in the aerospace field, more attention may be paid to the lightweight and high-strength characteristics of the material.

[0043] Furthermore, a layer of resin material is wrapped in the gap between the metal wire or belt spirally wound between the first skeleton 21 and the second skeleton 22 by extrusion, and these resin materials are fillers of the first skeleton 21 and the second skeleton 22 in the skeleton layer 2. Due to the presence of the filler, the skeleton layer 2 has better buffering performance when subjected to pressure, and the filling of the resin material also enhances the corrosion resistance of the skeleton layer 2. In deepwater applications, this design is particularly important because the composite pipe not only needs to withstand high pressure in the deep sea environment, but also faces highly corrosive seawater. By embedding the resin material in the metal skeleton, the service life of the composite pipe can be effectively extended and the maintenance cost can be reduced.

[0044] In summary, the reinforced composite pipe provided by the utility model significantly improves the mechanical properties of the composite pipe in harsh environments through the design of the double-layer skeleton and the reinforcement layer 4 between the skeleton layer 2 and the outer tube layer 3, and performs well in terms of resistance to external pressure, bending, and torsion. This composite pipe is particularly suitable for deep sea, oil extraction, aerospace and other fields, and has broad application prospects.

[0045] Implementation Method 2

[0046] like Figure 1-4 As shown, the difference from the first embodiment is that in order to further improve the ability of the composite pipe of the present application to relieve external forces, further, the pitch of the first skeleton 21 is D1, and the pitch of the second skeleton 22 is D2, wherein the value range of D1 is: 2mm-10mm; the value range of D2 is: 2mm-10mm. Through this design, it can be ensured that when the composite pipe is subjected to external forces, effective interaction forces can be generated between the two skeletons, thereby improving the overall compression and bending resistance.

[0047] It is worth noting that in the present application, D1 and D2 satisfy D1<D2. That is, although the pitch adjustment range of the first skeleton and the second skeleton 22 is the same, no matter what the size of the first pitch is, the size of the second pitch is always greater than the first pitch, thereby ensuring that when the composite tube is subjected to external force, the second skeleton 22 can provide additional support and stability for the first skeleton 21. This design enables the composite tube to exhibit better mechanical properties when facing a complex and changeable external force environment. When the pitch of the second skeleton 22 is larger, the winding of the second skeleton 22 is more sparse, which reduces the weight of the composite tube to a certain extent, making it more advantageous in fields such as aerospace that have strict weight requirements. In addition, by adjusting the size of the pitch, the stiffness and flexibility of the composite tube can be flexibly controlled to meet different application requirements.

[0048] Furthermore, along the length direction of the first skeleton 21 (X-axis direction), the pitch of the first skeleton 21 shows a trend of gradually increasing and then gradually decreasing, wherein the pitch of the first skeleton 21 corresponding to the center of the first skeleton 21 is the maximum value. This design can ensure that the central part of the composite pipe has a stronger supporting force when it is subjected to axial pressure, thereby improving the overall pressure resistance. This design is particularly suitable for deep-sea environments, because composite pipes not only need to withstand high pressure in the deep sea, but also face complex external forces. By optimizing the pitch distribution, the composite pipe can better adapt to pressure changes in deep-sea applications and reduce damage caused by uneven pressure. In addition, the above design allows the first skeleton 21 to adopt a denser pitch at key stress positions to enhance the pressure resistance of this area.

[0049] Furthermore, along the length direction of the second skeleton 22, the pitch of the second skeleton 22 shows a trend of gradually increasing and then gradually decreasing, wherein the pitch of the second skeleton 22 corresponding to the center of the second skeleton 22 is the maximum value. By improving the second skeleton 22 as above, the stability of the composite pipe when subjected to axial pressure can be further enhanced. This design ensures that the central part of the composite pipe can provide stronger support in high-pressure environments such as the deep sea, thereby effectively improving the overall compression resistance. At the same time, since the pitch of the second skeleton 22 is the largest at the center, this enables the composite pipe to better disperse pressure and reduce local stress concentration when subjected to external force, thereby improving the overall anti-bending and anti-torsion performance.

[0050] In practical applications, the design of this composite pipe can be optimized for different use environments. For example, in the field of oil extraction, the composite pipe needs to withstand the dual test of high pressure and corrosive environment. By adjusting the pitch of the first skeleton 21 and the second skeleton 22, the composite pipe can have good corrosion resistance while maintaining sufficient strength. By optimizing the pitch distribution, the weight of the composite pipe can be reduced while ensuring the structural strength, meeting the requirements for lightweight materials in different fields.

[0051] The rest of the details that are the same as those in Implementation 1 are not described in detail in this implementation.

[0052] Implementation 3

[0053] like Figure 1-4 As shown, the difference from Example 1 is that in order to further improve the ability of the skeleton layer 2 to mitigate internal and external forces, specifically, the thickness of the first skeleton 21 is H1, the thickness of the second skeleton 22 is H2, and H1 and H2 satisfy that H1 is less than H2. Thus, it can be ensured that when the composite pipe is subjected to external forces, the first skeleton 21 can be more effectively protected and supported by the second skeleton 22. This thickness difference design enables the composite pipe to have better buffering and absorption capabilities when facing impact and pressure, thereby improving overall durability and safety.

[0054] Furthermore, along the length direction (X-axis direction) of the first skeleton 21, the thickness of the first skeleton 21 shows a trend of first increasing and then decreasing, and the thickness of the first skeleton 21 corresponding to the center of the first skeleton 21 is the maximum value. Thus, it can be ensured that when the composite pipe is subjected to axial pressure, the central part has a stronger supporting force, thereby improving the overall pressure resistance. This design is particularly suitable for deep-sea environments, because composite pipes not only need to withstand high pressure in the deep sea, but also face complex external forces. By optimizing the thickness distribution, the composite pipe can better adapt to pressure changes in deep-sea applications and reduce damage caused by uneven pressure. In addition, the above design allows the first skeleton 21 to use thicker materials at key stress positions to enhance the pressure resistance of this area.

[0055] Furthermore, along the length direction (X-axis direction) of the second skeleton 22, the thickness of the second skeleton 22 also shows a trend of first increasing and then decreasing, and the thickness of the second skeleton 22 corresponding to the center of the second skeleton 22 is the maximum. Thus, the stability of the composite pipe when subjected to axial pressure can be further enhanced. This design ensures that the central part of the composite pipe can provide stronger support in high-pressure environments such as deep sea, thereby effectively improving the overall compression resistance. At the same time, since the thickness of the second skeleton 22 is the largest at the center, the composite pipe can better disperse the pressure when subjected to external force, reduce local stress concentration, and thus improve the overall anti-bending and anti-torsion performance. In the specific implementation process, the design of this composite pipe can be optimized for different use environments. For example, in the field of oil extraction, the composite pipe needs to withstand the dual test of high pressure and corrosive environment. By adjusting the thickness of the first skeleton 21 and the second skeleton 22, the composite pipe can have good corrosion resistance while maintaining sufficient strength.

[0056] Furthermore, the first skeleton 21 and the second skeleton 22 are both made of metal, and the cross-sections of the first skeleton 21 and the second skeleton 22 are any one of circular, elliptical, and hexagonal, which further enhances the bonding force between the metal wire and other layers during the winding process and increases the overall strength. At the same time, the interiors of the first skeleton 21 and the second skeleton 22 are both hollow structures. Thus, it can be ensured that when the composite pipe is subjected to external force, the internal structure can provide sufficient space to adapt to the deformation of the material, thereby further improving the overall compression and bending resistance. This hollow structure design not only reduces the weight of the composite pipe, but also increases its flexibility to a certain extent, so that it has better buffering ability when facing impact and pressure.

[0057] Furthermore, a reinforcement layer 4 is provided between the skeleton layer 2 and the outer tube layer 3, and the reinforcement layer 4 is composed of multiple glass fiber layers and a resin layer formed by impregnating the fiber layers with resin. During the manufacturing process, the resin and the glass fiber layer can be pre-impregnated with the prepreg technology, and then wound on the mold, and a composite tube is formed by a thermal curing process. This manufacturing method can ensure the structural uniformity and consistency of the mechanical properties of the composite tube.

[0058] The rest of the details that are the same as those in Implementation 1 are not described in detail in this implementation.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reinforced composite pipe with an external pressure resistance function, comprising a base pipe (1), wherein a first cavity (11) is provided on the inner side of the base pipe (1), and characterized in that: Along the thickness direction of the base tube (1), the base tube (1) is provided with a skeleton layer (2) and an outer tube layer (3) arranged on the outer surface of the skeleton layer (2) in sequence on a surface away from the first cavity (11), and the skeleton layer (2) and the outer tube layer (3) are both made of resin material; A first skeleton (21) and a second skeleton (22) arranged parallel to the first skeleton (21) are arranged in the skeleton layer (2); the first skeleton (21) and the second skeleton (22) are respectively arranged to be wound along the axial direction of the first cavity (11).

2. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: The spiral direction in which the first skeleton (21) is wound is different from the spiral direction in which the second skeleton (22) is wound.

3. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: The pitch of the first skeleton (21) is D1, and the pitch of the second skeleton (22) is D2, wherein the value range of D1 is: 2mm-10mm; the value range of D2 is: 2mm-10mm.

4. The reinforced composite pipe with external pressure resistance function according to claim 3, characterized in that: D1 and D2 satisfy D1<D2.

5. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: Along the length direction of the first skeleton (21), the pitch of the first skeleton (21) shows a trend of first gradually increasing and then gradually decreasing, wherein the pitch of the first skeleton (21) corresponding to the center of the first skeleton (21) is the maximum value; And / or along the length direction of the second skeleton, the pitch of the second skeleton (22) shows a trend of first gradually increasing and then gradually decreasing, wherein the pitch of the second skeleton (22) corresponding to the center of the second skeleton (22) is the maximum value.

6. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: The thickness of the first frame (21) is H1, the thickness of the second frame (22) is H2, and H1 and H2 satisfy that H1 is less than H2.

7. The reinforced composite pipe with external pressure resistance function according to claim 6, characterized in that: Along the length direction of the first skeleton (21), the thickness of the first skeleton (21) shows a trend of first increasing and then decreasing, and the thickness of the first skeleton (21) corresponding to the center of the first skeleton (21) is the maximum value; And / or, along the length direction of the second skeleton (22), the thickness of the second skeleton (22) shows a trend of first increasing and then decreasing, and the thickness of the second skeleton (22) corresponding to the center of the second skeleton (22) is the maximum value.

8. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: The first frame (21) and the second frame (22) are both made of metal, and the cross-sections of the first frame (21) and the second frame (22) are any one of circular, elliptical and hexagonal.

9. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: The interiors of the first frame (21) and the second frame (22) are both hollow structures.

10. The reinforced composite pipe with external pressure resistance function according to claim 1, characterized in that: A reinforcement layer (4) is further provided between the skeleton layer (2) and the outer tube layer (3), and the reinforcement layer (4) is composed of a plurality of glass fiber layers and a resin layer formed by impregnating the glass fiber layers with resin.

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