Fiber composite hollow reinforced pipeline with spiral ribs

Abstract

The utility model discloses a fiber composite hollow reinforced pipeline with spiral ribs, and relates to the field of composite pipelines, the pipeline comprises a lining layer, an inner structure layer, a hollow layer, an outer structure layer and a spiral rib layer from inside to outside, and all the layers are fixedly bonded into a whole, the lining layer is formed by sequentially and alternately overlapping a glass fiber surface mat, a glass fiber knitted mat and gridding cloth, and resin layers for bonding all the layers are clamped among all the layers; the inner structural layer and the outer structural layer are formed by winding glass fiber yarns or basalt fiber yarns mixed with resin in a reciprocating manner; the hollow layer is composed of a plurality of hollow glass fiber reinforced plastic upper pipe fittings which are arranged on the outer surface of the structural layer in a surrounding mode, coaxial with the pipeline and provided with D-shaped sections. The spiral rib layer is composed of ribs spirally wound and fixedly adhered to the outer surface of the outer structural layer, and each rib is formed by radially and tightly gathering a plurality of long glass fiber filaments mixed with resin. According to the pipeline, the weight of the pipeline is greatly reduced while the higher ring stiffness is improved.

Description

Technical Field

[0001] The present application relates to the field of composite pipes, and in particular to a fiber composite hollow reinforced pipe with spiral ribs. Background Art

[0002] Composite pipes are increasingly used in modern engineering, especially in extreme and specialized engineering environments. With their superior corrosion resistance, lightweight construction, and high plasticity, composite pipes are gradually replacing traditional metal pipes and becoming a key infrastructure material. However, existing composite pipes still have limitations in production, application, and multifunctional integration.

[0003] First, the existing manufacturing process for composite pipes is relatively complex, especially for large-diameter pipes. Due to material and process limitations, the maximum diameter is typically limited to 5 meters. Furthermore, the existing process cannot achieve continuous production, resulting in low production efficiency and high manufacturing costs. This significantly limits the widespread adoption of composite pipes, especially in large-scale municipal projects requiring extensive laying. Costs have become a major bottleneck to their further development.

[0004] Secondly, the structural design of existing composite pipes is mostly simple, usually a single pipe wall structure. Although this design can meet the basic transportation function, its pressure bearing capacity is limited. When encountering large external pressure or impact, it is easy to cause structural deformation or damage. Especially in some high-pressure or high-load scenarios, existing pipes show insufficient impact resistance and cracking resistance. In order to improve the compressive strength, an intuitive solution is to increase the wall thickness of the pipe. However, this will lead to a significant increase in material costs, and the increased weight will also cause inconvenience in transportation and installation, especially in large facilities or difficult-to-reach locations. In addition, thicker walls also mean longer curing time, which increases the production cycle and further increases costs. In order to ensure the reliability of the pipeline, additional protection and support measures are often required during the construction process, which not only increases the complexity of construction, but also increases construction costs.

[0005] Furthermore, existing pipelines have significant limitations in terms of multifunctional integration. Due to their monolithic structure, existing pipelines cannot be flexibly integrated with other functional modules, such as traversing communication optical and electrical cables or implementing intelligent monitoring functions. Consequently, their full potential for intelligent management and multifunctional applications is limited. Modern engineering projects, particularly in areas such as smart city construction and the Industrial Internet of Things, place higher demands on the multifunctional integration of pipeline systems, and existing composite pipes struggle to meet these requirements.

[0006] The performance of existing composite pipes in extreme environments also needs to be improved. In high-temperature, high-humidity, or highly corrosive environments, the mechanical properties and service life of pipes are often affected, and existing structures and materials struggle to provide sufficient stability and reliability. Especially during long-term operation, the aging resistance of existing pipes is relatively limited, making them unsuitable for engineering applications that require long-term stable operation.

[0007] Based on the above problems, it is particularly important to develop an improved composite pipe that can achieve greater radial bearing pressure, higher impact resistance, and multifunctional integration capabilities. Utility Model Content

[0008] The purpose of the present application is to overcome at least one of the shortcomings of the prior art and to provide a fiber composite hollow reinforced pipe with spiral ribs, which greatly reduces the weight of the pipe while increasing the ring stiffness.

[0009] To achieve the above-mentioned purpose, the present application discloses a fiber composite hollow reinforced pipe with spiral ribs, which comprises, from the inside to the outside, an inner lining layer, an inner structural layer, a hollow layer, an outer structural layer, and a spiral rib layer, and the layers are bonded together as a whole, wherein the inner lining layer is composed of glass fiber surface felt, glass fiber knitted felt, and mesh cloth alternately stacked in sequence, and a resin layer is sandwiched between the layers to bond the layers; the inner structural layer and the outer structural layer are composed of glass fiber yarn or basalt fiber yarn mixed with resin wound reciprocatingly; the hollow layer is composed of several hollow glass fiber reinforced plastic upper pipe fittings with a D-shaped cross section arranged coaxially with the pipe and arranged around the outer surface of the structural layer; the spiral rib layer is composed of ribs spirally wound and bonded to the outer surface of the outer structural layer, and the ribs are composed of several long glass fiber filaments mixed with resin radially tightly gathered.

[0010] In some embodiments, the lining layer is 1.2-1.5 mm thick.

[0011] In some embodiments, the thickness of the inner structural layer is 1-3% of the pipe diameter.

[0012] In some embodiments, the bottom transverse surface of each tube of the hollow layer is adhered to the outer surface of the inner structural layer.

[0013] In some embodiments, the tubes of the hollow layer are alternately bonded to the outer surface of the structural layer.

[0014] In some embodiments, the pipe in the hollow layer is a pipe with a ring stiffness of 10,000.

[0015] In some embodiments, the outer surface of the tube in the hollow layer is smooth.

[0016] In some embodiments, the outer structural layer is 5-10 mm thick.

[0017] In some embodiments, the resin is an epoxy resin or an orthophthalic unsaturated resin.

[0018] In some embodiments, the hollow layer is bonded to the inner surface of the outer structural layer.

[0019] In some embodiments, the spiral pitch of the ribs of the spiral rib layer is 50-100 mm.

[0020] In some embodiments, the ribs in the spiral rib layer are cylindrical.

[0021] Compared with the prior art, this application has at least one of the following beneficial effects:

[0022] 1. Improve ring stiffness: By setting the spiral rib layer and the hollow layer, the ring stiffness of the pipeline is enhanced, and its pressure bearing capacity and impact resistance are improved.

[0023] 2. Reduce pipeline weight: The design of spiral ribs and hollow structure greatly reduces the amount of material used, reducing the weight of the pipeline while ensuring strength, making it easier to transport and install.

[0024] 3. Structural optimization: Multi-layer composite structure design, including lining layer, inner and outer structural layers and hollow layer, improves the mechanical properties and service life of the pipeline and is suitable for high pressure and extreme environments.

[0025] 4. Multifunctional integration: Through the hollow design of the pipeline, optical cables, electrical cables and other functions can be integrated, which expands the application scenarios of the pipeline and meets the needs of modern engineering for intelligence and multifunctionality.

[0026] 5. Reduced production costs: The innovative design of spiral ribs and hollow layers reduces wall thickness requirements, reduces material costs and production cycles, and improves economy.

[0027] The above-listed beneficial effects are not exhaustive and other potential beneficial effects and detailed technical implementations will be further disclosed in the examples or other description sections of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] After reading the following detailed description in conjunction with the accompanying drawings, you will better understand the various aspects of the present disclosure. The positions, sizes, and ranges of various structures shown in the drawings and the like sometimes do not represent the actual positions, sizes, and ranges. In the drawings:

[0029] Figure 1 It is a structural diagram of an embodiment disclosed in this application.

[0030] Figure 2It is a structural schematic diagram of an embodiment disclosed in this application from another perspective.

[0031] Figure 3 It is a schematic diagram of the cross-sectional structure of an embodiment disclosed in this application.

[0032] Figure 4 It is a schematic structural diagram of a spiral rib according to an embodiment disclosed in the present application.

[0033] Figure 5 This is a schematic diagram of the structure of a spiral rib in an embodiment disclosed in this application.

[0034] Figure 6 It is a structural schematic diagram of a pipe fitting in an embodiment disclosed in this application.

[0035] Figure 7 This is a schematic diagram of the pipeline cross-sectional structure of another embodiment disclosed in this application. DETAILED DESCRIPTION

[0036] The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments.

[0037] It should be understood that like reference numerals refer to like elements throughout the drawings. In the drawings, the dimensions of some features may be distorted for clarity.

[0038] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, the techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered part of the authorization specification.

[0039] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Example

[0040] like Figures 1 to 6 As shown, through the combined description of the accompanying drawings, those skilled in the art can more intuitively and comprehensively understand the specific structure, working principle and functional role of each layer of this embodiment, so as to better implement and apply the present application.

[0041] Specifically, this embodiment discloses a fiber composite hollow reinforced pipe with spiral ribs, such as Figure 1 、 2 As shown, the pipeline includes an inner lining layer 1, an inner structural layer 2, a hollow layer 3, an outer structural layer 4 and a spiral rib layer 5 from the inside to the outside.

[0042] Liner 1 is composed of alternating layers of glass fiber surface mat, knitted glass fiber mat, and mesh fabric. Bonding resin layers are sandwiched between the layers to ensure a secure bond, significantly improving the durability and overall strength of the pipeline. Liner 1 has a thickness ranging from 1.2 to 1.5 mm and can be optimized based on specific application environments and load requirements to achieve the optimal balance between flexibility and strength.

[0043] It should be understood that the inner lining layer 1 not only plays a structural supporting role, but also isolates the internal medium from corrosive or other destructive effects on the pipeline, thereby enhancing its adaptability in various industrial applications.

[0044] In this embodiment, the inner structural layer 2 is made of resin-containing glass fiber yarn or basalt fiber yarn through a reciprocating winding process. This winding process evenly distributes the fibers across the pipe cross-section, significantly enhancing the pipe's axial and circumferential strength. The thickness of the inner structural layer 2 is 1-3% of the pipe diameter, depending on the pipe diameter. For example, for a 1000 mm diameter pipe, the thickness of the inner structural layer 2 is 10 mm.

[0045] The inner structural layer 2 possesses excellent stiffness and strength, effectively resisting internal and external pressure differentials and reducing damage caused by stress concentration. Furthermore, this layer exhibits excellent fatigue resistance, enabling the pipeline to maintain reliability over extended periods of operation. This significantly enhances the overall mechanical performance and service life of the pipeline, particularly in environments subject to prolonged high-pressure conditions.

[0046] The hollow layer 3 is composed of a number of hollow glass fiber reinforced plastic pipes 6 with D-shaped cross sections (such as Figure 6 These pipes 6 are coaxially arranged with the pipes on the outer surface of the inner structural layer 2. The bottom transverse surface of each pipe 6 is bonded to the inner structural layer 2 with resin. Each pipe 6 in the hollow layer 3 has high ring stiffness and a smooth outer surface, which improves the mechanical properties of the bonding.

[0047] It's important to understand that the hollow layer 3 not only increases the rigidity of the pipeline but also provides ample space for the integration of communication cables, electrical cables, and intelligent monitoring systems, expanding the pipeline's functionality. Furthermore, the hollow layer 3 design plays an important role in thermal insulation and shock absorption. By reducing material usage, the hollow layer 3 effectively reduces the overall weight of the pipeline, facilitating transportation and installation, thereby reducing construction time and costs.

[0048] In this embodiment, the outer structural layer 4 is made of glass fiber yarn or basalt fiber yarn mixed with resin through a reciprocating winding process. It has a thickness of 5-10 mm and serves to increase the pipe's hoop stiffness while also enhancing the pipe's exterior protection, protecting it from external impact damage during transportation, installation, and use. The outer structural layer 4 is tightly bonded to the inner surface of the hollow layer 3 via resin, specifically contacting and bonding with the arcuate surfaces of each pipe fitting, ensuring the overall stability of the structure.

[0049] like Figure 4 、 5 As shown, the spiral rib layer 5 is composed of a number of ribs 7 that are spirally wound and adhered to the outer surface of the outer structural layer. Each spiral rib 7 is composed of a plurality of long glass fiber filaments mixed with resin that are radially compacted. These ribs are evenly distributed in a spiral form on the outer surface of the outer structural layer 4. The spiral pitch of the ribs in the spiral rib layer 5 is 50-100 mm. The spiral rib layer 5 significantly enhances the annular stiffness of the pipeline and effectively improves its pressure bearing capacity and impact resistance. The geometric characteristics of the ribs 7 help to evenly distribute the external load on the surface of the pipeline, reduce stress concentration, and enable the pipeline to maintain structural stability under high-pressure environments. Especially when subjected to circumferential loads, the role of the spiral rib layer 5 is particularly significant, and the additional support it provides significantly improves the bending resistance and structural stability of the pipeline. By reducing the material thickness requirement, the spiral rib layer reduces the overall material usage while ensuring strength, thereby effectively controlling production costs.

[0050] This fiber-composite hollow reinforced pipe demonstrates significant advantages in its application. The multi-layered composite design significantly enhances the pipe's overall mechanical properties, maintaining structural stability even under high stress conditions. The synergistic effect of this multi-layered structure ensures excellent performance and reliability under high pressure, high impact, and complex environments, meeting the diverse needs of modern engineering.

[0051] The lightweight design makes this pipe easier to transport and install. Compared to traditional metal pipes, this composite pipe is significantly lighter, reducing transportation costs, reducing the need for large-scale machinery during installation, and significantly shortening construction time. The hollow layer 3 also provides additional space for the passage of communication optical and electrical cables, eliminating the need for additional conduit and further enabling multifunctional integration. Furthermore, the innovative design of the spiral ribs 7 not only reduces material usage and production costs, but also improves production efficiency, making the entire manufacturing process more economical. Example

[0052] like Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the various pipe fittings 6 of the hollow layer 3 are bonded to the outer surface of the inner structural layer 2 in a staggered manner, which means that adjacent pipe fittings 6 are arranged by changing their orientation to maximize the overall stability and bonding area of ​​the hollow structure. The staggered bonding method ensures that the pipe fittings 6 in the hollow layer 3 can support and offset stress when subjected to multi-directional pressure from the outside, thereby maintaining stability of the hollow layer 3 structure when subjected to complex stress states. In addition, this staggered arrangement can also optimize the seismic performance of the pipeline, so that when the pipeline is vibrated or impacted, the various pipe fittings 6 can effectively disperse and absorb energy through interaction, preventing damage caused by local stress concentration.

[0053] Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications may be made to the exemplary embodiments of the present disclosure without departing substantially from the spirit and scope of the present disclosure. Therefore, all such changes and modifications are intended to be within the scope of protection of the present disclosure as defined by the appended claims. The present disclosure is defined by the appended claims, and equivalents of these claims are intended to be included therein.

Claims

1. A fiber composite hollow reinforced pipe with spiral ribs, characterized by: The pipeline consists of an inner lining layer, an inner structural layer, a hollow layer, an outer structural layer, and a spiral rib layer from the inside to the outside, and the layers are bonded together. The inner lining layer is composed of glass fiber surface felt, glass fiber knitted felt, and mesh cloth alternately stacked in sequence, and a resin layer is sandwiched between the layers to bond the layers. The inner and outer structural layers are made of glass fiber yarn or basalt fiber yarn mixed with resin wound reciprocatingly. The hollow layer is composed of several hollow glass fiber reinforced plastic upper pipe fittings with a D-shaped cross section that are arranged coaxially with the pipeline and are arranged on the outer surface of the structural layer. The spiral rib layer is composed of ribs spirally wound and bonded to the outer surface of the outer structural layer, and the ribs are composed of several long glass fiber filaments mixed with resin that are radially tightly gathered.

2. A fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The lining layer is 1.2-1.5 mm thick.

3. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The thickness of the inner structural layer is 1-3% of the pipe diameter.

4. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The bottom transverse surface of each pipe piece of the hollow layer is adhered to the outer surface of the inner structural layer.

5. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The pipes of the hollow layer are fixed on the outer surface of the structural layer in an alternating manner.

6. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The pipes in the hollow layer are pipes with a ring stiffness of 10,000.

7. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The outer surface of the tube in the hollow layer is smooth.

8. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The outer structural layer is 5-10 mm thick.

9. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The spiral pitch of the ribs of the spiral rib layer is 50-100 mm.

10. The fiber composite hollow reinforced pipe with spiral ribs as claimed in claim 1, characterized in that: The ribs in the spiral rib layer are cylindrical.

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