Hollow reinforced pipeline with fiber composite structure

Abstract

The utility model discloses a fiber composite structure hollow reinforced pipeline which comprises a lining layer, an inner structure layer, a hollow layer and an outer structure layer from inside to outside, 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 the layers are clamped between 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. According to the pipeline, through the novel structure, the structural stability and the ring stiffness of the pipeline are remarkably improved, the mechanical property is remarkably improved, and the stability of the pipeline can be kept under the condition that the pipeline bears external impact and environmental stress.

Description

Technical Field

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

[0002] At present, composite pipes are increasingly used in the market, especially in some special engineering environments. With their excellent corrosion resistance and lightweight characteristics, composite pipes have gradually replaced traditional metal pipes and become one of the important choices in engineering construction. However, existing composite pipes are usually made of a single material, and the maximum diameter can only reach 5 meters. Due to the limitations of the production process, existing pipes cannot be produced continuously, resulting in high manufacturing costs. The high cost has greatly hindered the promotion of composite pipes in the market, especially in large-scale engineering projects, where cost issues have become the main factor restricting their development. In addition, due to the limitations of the process and materials, the performance of existing composite pipes in certain extreme environments (such as high temperature and strong impact) is not ideal, and they are prone to breakage and structural deformation, which affects the reliability and safety of their engineering applications.

[0003] The shortcomings of existing technologies are mainly reflected in the following aspects: First, the diameter of the pipe is limited and cannot meet the demand for ultra-large diameter pipes in certain specific scenarios. There are currently few types of composite pipes available on the market. Secondly, since existing pipes cannot achieve continuous production, the production efficiency is low, and the manufacturing cost is high, their market competitiveness is weak, which is not conducive to their application in large-scale municipal projects and special environments. In addition, the ring stiffness of existing pipes is low, and their impact and crack resistance are insufficient. In actual applications, it is necessary to improve construction standards and protective measures, which increases construction and maintenance costs. The single wall structure of traditional pipes also limits multi-functional integration, such as crossing communication optical cables, electrical cables, or realizing intelligent monitoring, which limits their application in intelligent management. The limitations of existing pipes greatly restrict their application in complex and changing environments, and they cannot meet the requirements of modern engineering for versatility and high reliability. This limitation is especially obvious in some scenarios that require long-term operation and withstand greater environmental pressure.

[0004] In order to overcome the above shortcomings, it is particularly important to develop a new type of hollow composite pipe. Utility Model Content

[0005] The purpose of this application is to overcome at least one of the shortcomings of the existing technology and to provide a fiber composite structure hollow reinforced pipe. The new structure of the pipe significantly improves the structural stability and ring stiffness of the pipe, achieves a significant improvement in mechanical properties, and enables it to maintain stability under external impact and environmental stress. It is also lighter in weight, making transportation and installation more convenient, effectively reducing the construction difficulty and the requirements for construction equipment, thereby further saving construction costs and time.

[0006] To achieve the above-mentioned objectives, the present application discloses a fiber composite structure hollow reinforced pipe, which comprises, from the inside to the outside, an inner lining layer, an inner structural layer, a hollow layer, and an outer structural layer, 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 each layer to bond the layers; the inner structural layer and the outer structural layer are formed by reciprocating winding of glass fiber yarn or basalt fiber yarn mixed with resin; the hollow layer is composed of a number of hollow glass fiber reinforced plastic upper pipe fittings with a D-shaped cross section, which are arranged coaxially with the pipe and surrounded on the outer surface of the structural layer.

[0007] In some embodiments, the lining layer is 1.2-1.5 mm thick.

[0008] In some embodiments, the thickness of the inner structural layer is 1% of the pipe diameter.

[0009] 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.

[0010] In some embodiments, the tubes of the hollow layer are alternately bonded to the outer surface of the structural layer.

[0011] In some embodiments, the pipe in the hollow layer is a pipe with a ring stiffness of 10,000.

[0012] In some embodiments, the outer surface of the tube in the hollow layer is smooth.

[0013] In some embodiments, the outer structural layer is 5-10 mm thick.

[0014] In some embodiments, the resin is an epoxy resin or an orthophthalic unsaturated resin.

[0015] In some embodiments, the hollow layer is bonded to the inner surface of the outer structural layer.

[0016] Compared with the prior art, this application has at least one of the following beneficial effects:

[0017] 1. Enhanced structural stability and ring stiffness: The multi-layer composite structure design significantly improves the overall mechanical properties of the pipeline, making it more stable in high-stress environments.

[0018] 2. Improve the ability to resist impact and environmental stress: The pipeline can withstand external impact and complex environmental pressure, reduce the risk of damage and increase service life.

[0019] 3. Lighter weight, easier to transport and install: The new pipe is light in weight, which reduces transportation costs and installation difficulty, and effectively improves construction efficiency.

[0020] 4. Strong scalability: The hollow design of the pipe provides space for the passage of communication optical cables, electrical cables and the integration of intelligent monitoring systems, expanding the functionality of the pipeline.

[0021] 5. Reduce construction costs and time: Lightweight design and structural optimization reduce dependence on construction equipment, saving construction time and costs.

[0022] 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

[0023] 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:

[0024] Figure 1 This is a schematic structural diagram of the first embodiment disclosed in this application, in which each layer is partially cut away.

[0025] Figure 2 It is a schematic cross-sectional structural diagram of the first embodiment disclosed in this application.

[0026] Figure 3 It is a structural schematic diagram of the pipe fitting in the first embodiment disclosed in this application.

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the second embodiment disclosed in this application. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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

[0032] like Figure 1-3 As shown, this embodiment discloses a fiber composite hollow reinforced pipe designed to improve its strength and durability. The overall structure of the pipe, from the inside out, comprises an inner lining layer 1, an inner structural layer 2, a hollow layer 3, and an outer structural layer 4. The interaction between these layers ensures the pipe's mechanical properties and environmental adaptability, achieving high overall reliability and service life.

[0033] Specifically, the thickness of the inner lining layer is typically between 1.2 and 1.5 mm. It is designed to ensure a low coefficient of friction when fluid media passes through and the long-term stability of the inner wall of the pipe. The inner lining layer 1 adopts a multi-layer stacked structure, consisting of glass fiber surface felt, glass fiber knitted felt, and mesh cloth alternately stacked in sequence. Each material layer has a unique function and role. The glass fiber surface felt is used to provide surface smoothness and corrosion resistance, ensuring that the inner lining layer 1 is not easily corroded by the medium during long-term use; the glass fiber knitted felt increases the thickness and impact resistance of the inner lining layer 1, making the entire structure more solid and durable; and the mesh cloth is used to enhance the overall mechanical strength of the inner lining layer 1, especially its tensile strength and crack resistance. Resin layers are sandwiched between the layers of material to bond them together. These resin layers tightly bind the glass fiber layers together through penetration and curing to form a single entity. The resin layer not only acts as a bond but also gives the inner lining layer 1 high chemical resistance and sealing properties, preventing liquid or gas media from penetrating into the inner lining layer 1, thereby enhancing the protective performance of the inner lining layer 1. This interlayer structure design enables the inner lining layer 1 to have high strength, chemical corrosion resistance and structural stability, and is suitable for long-term use in complex working conditions and harsh environments.

[0034] In this embodiment, the inner structural layer 2 is made of glass fiber yarn or basalt fiber yarn mixed with resin through reciprocating winding to form a composite reinforcement structure. The thickness of the inner structural layer 2 is approximately 1% to 3% of the pipe diameter. This design provides the necessary structural support for the pipe to withstand internal and external pressure. In practical applications, the inner structural layer 2 effectively improves the overall rigidity of the pipe and is particularly suitable for liquid or gas transportation scenarios that need to withstand high pressure. In addition, the material selection and winding method of the inner structural layer 2 enable it to maintain stable performance under extreme conditions such as high temperature and high pressure, ensuring reliability in demanding industrial applications.

[0035] In this embodiment, the hollow layer 3 consists of multiple hollow, D-shaped pipe fittings 5, coaxial with the pipe, arranged on the outer surface of the inner structural layer 2. These pipe fittings 5 are made of fiberglass reinforced plastic (FRP) and have their bottom transverse surfaces bonded to the outer surface of the inner structural layer 2, forming a hollow reinforcement structure surrounding the inner structural layer 2. The hollow layer 3 is designed to improve the overall rigidity of the pipe, reduce weight, and enhance thermal insulation to a certain extent. The hollow layer 3 not only provides additional support in high-pressure environments but also effectively insulates the pipe, reducing heat loss from the internal fluid. These pipe fittings 5 have smooth outer surfaces and a ring stiffness of 10,000 to ensure structural stability. The pipe fittings 5 in the hollow layer 3 are distributed axially along the pipe and tightly bonded to the inner structural layer 2 to ensure structural support and durability during long-term use. This hollow structure reduces the overall weight of the pipe without sacrificing strength and stability, making it particularly suitable for applications where weight is a concern, such as long-span piping systems where the load on the supporting structure needs to be reduced.

[0036] In this embodiment, the outer structural layer 4 is coated on the outside of the hollow layer 3 and is formed by winding glass fiber yarn or basalt fiber yarn mixed with resin. The thickness is between 5 and 10 mm, which aims to further improve the impact resistance and environmental tolerance of the pipeline. The design of the outer structural layer 4 isolates the hollow layer 3 from the outside world, thereby effectively preventing the pipe 5 from being damaged by direct impact of external factors. The thickness and material selection of the outer structural layer 4 enable it to effectively resist external mechanical damage while having excellent weather resistance. The inner surface of the hollow layer 3 and the outer structural layer 4 are bonded by resin to ensure the tight connection and consistency of the overall structure. Through this tight bonding design, the outer structural layer provides protection for the hollow layer while ensuring the overall structural stability, and can maintain stable structural performance even in long-term harsh environments.

[0037] It's important to understand that in the above structure, the resin layer can be made of either epoxy resin or ortho-phthalic unsaturated resin. Depending on the specific application scenario, these materials offer excellent bonding and corrosion resistance, making them suitable for long-term exposure to harsh environments, such as high humidity or the presence of corrosive chemicals. Epoxy resin, with its excellent mechanical properties and chemical stability, is suitable for applications requiring high strength, while ortho-phthalic unsaturated resin, with its excellent chemical resistance and cost advantages, is suitable for applications requiring both cost-effectiveness and corrosion resistance.

[0038] The pipeline of this embodiment has significant beneficial effects. For example, the design of the hollow layer not only reduces the weight of the pipeline, but also improves its rigidity, making it suitable for application scenarios that require high rigidity and lightweight, such as large-scale chemical pipeline systems, long-distance liquid transportation systems, etc. In specific usage scenarios, the pipeline exhibits excellent performance in applications that require high mechanical strength and corrosion resistance, such as the chemical industry, oil and gas transmission fields. Through the synergistic effect of the inner and outer structural layers and the hollow reinforcement layer, the pipeline can effectively respond to internal and external pressure changes and maintain overall stability and durability. At the same time, the multi-layer structural design of the pipeline effectively disperses the effects of internal and external pressures on the pipeline, so that it has better stability when subjected to instantaneous high-pressure shocks. In addition, the thermal insulation effect of the hollow layer reduces the heat loss of the fluid inside the pipeline, which significantly improves its energy efficiency in hot fluid transportation. Example

[0039] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that the various pipe fittings 5 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 5 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 5 in the hollow layer 3 can support and offset each other when subjected to multi-directional pressure from the outside, thereby maintaining the 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 5 can effectively disperse and absorb energy through interaction, preventing damage caused by local stress concentration.

[0040] 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 structure hollow reinforced pipe, characterized by: The pipeline consists of an inner lining layer, an inner structural layer, a hollow layer, and an outer structural layer from the inside to the outside. The inner lining layer is composed of glass fiber surface felt, glass fiber knitted felt, and mesh cloth alternately stacked in sequence, with a resin layer sandwiched between each layer 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 a number of hollow glass fiber reinforced plastic upper pipe fittings with a D-shaped cross section, which are arranged coaxially with the pipeline and surrounded on the outer surface of the structural layer.

2. A fiber composite hollow reinforced pipe 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 according to claim 1, characterized in that: The thickness of the inner structural layer is 1% of the pipe diameter.

4. The fiber composite hollow reinforced pipe according to 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 according to 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 structure hollow reinforced pipe according to 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 according to claim 1, characterized in that: The outer surface of the tube in the hollow layer is smooth.

8. The fiber composite structure hollow reinforced pipe according to claim 1, characterized in that: The outer structural layer is 5-10 mm thick.

9. The fiber composite hollow reinforced pipe according to claim 1, characterized in that: The hollow layer is adhered to the inner surface of the outer structural layer.

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