City fiber composite material spiral rib hollow pipe gallery

Abstract

The utility model discloses an urban fiber composite material spiral rib hollow pipe gallery which is in a hollow circular tube shape and comprises an inner flame-retardant layer, an inner structural layer, a hollow layer, an outer structural layer and a spiral rib layer from inside to outside, all the layers are fixedly bonded into a whole, the pipe gallery is provided with at least one lattice structural part in the axial direction, and the lattice structural part is arranged in the hollow layer. The hollow space of the structural part is divided into a plurality of mounting positions along the axial direction by the lattice structural part; the flame-retardant layer is formed by glass fiber yarns and / or basalt fiber yarns which are mixed with flame-retardant resin and are wound in a reciprocating manner; and the inner structural layer and the outer structural layer are formed by glass fiber yarns and / or basalt fiber yarns which are mixed with resin and are wound in a reciprocating manner. The pipe gallery is excellent in structural stability, corrosion resistance and high temperature resistance by adopting the fiber composite material and the hollow design of the spiral ribs.

Description

Technical Field

[0001] The present application relates to the field of composite building materials, and in particular to a fiber composite material spiral rib hollow pipe gallery for urban use. Background Art

[0002] As a key component of urban infrastructure, the quality of urban pipeline corridor construction and maintenance directly impacts the safety and reliability of urban operations. Currently, traditional urban pipeline corridors are primarily constructed from precast cement components and metal structures. While these materials offer considerable structural strength and load-bearing capacity, they exhibit numerous deficiencies in practical application. With the advancement of urban modernization, the performance requirements for structural materials in urban pipeline corridor systems are continuously increasing, and the limitations of traditional materials are becoming increasingly apparent.

[0003] First, existing prefabricated cement pipe corridors face high project and construction costs. The transportation, installation, and construction of cement materials require extensive equipment and manual labor, significantly increasing project capital investment. Furthermore, the heavy weight of cement structures complicates installation and raises construction standards. Furthermore, the poor flatness of cement materials makes it difficult to ensure the overall finish after construction, placing even higher demands on construction quality. Over long-term use, prefabricated cement pipe corridors are prone to cracking, resulting in a decrease in structural strength and increased safety hazards. This is particularly true in urban environments with complex geological conditions, where ensuring the stability of cement pipe corridors is difficult. Furthermore, cement materials have weak seismic performance, making them difficult to withstand the impact of natural disasters, limiting their widespread use in urban infrastructure.

[0004] Secondly, although metal pipe corridors excel in strength, they have significant deficiencies in corrosion resistance and high-temperature resistance. In urban underground environments, metal materials are easily affected by moisture and corrosive substances, leading to rust and aging of the pipe corridor structure. In order to extend the service life of metal pipe corridors, complex anti-corrosion coating treatments are usually required. However, this not only significantly increases material and construction costs, but also makes the maintenance process relatively cumbersome. Metal materials also have deficiencies in coping with high-temperature environments in cities, limiting their use in certain special application scenarios. In addition, the weight of metal pipe corridors greatly increases the difficulty of transportation and installation, requiring the use of large equipment for lifting, which further increases the complexity and cost of construction.

[0005] More importantly, whether it's cement or metal tunnels, existing technologies are relatively backward in design, process, and construction methods, making it difficult to meet the demands of modern cities for intelligent and multifunctional tunnel systems. Traditional materials have complex installation processes and long construction cycles, making them difficult to adapt to the diverse construction requirements of urban tunnels. Furthermore, due to their insufficient hoop stiffness, these materials are prone to cracking or breakage when subjected to external forces, thus affecting the overall performance and safety of the tunnels. The construction process of traditional tunnels also requires a large number of accessories and support structures, further increasing the complexity of construction and the difficulty of maintenance. Furthermore, traditional tunnel materials lack versatility and are difficult to integrate with modern intelligent detection systems, communication facilities, and other technologies, limiting the functional expansion capabilities of urban tunnels.

[0006] In view of these problems existing in the existing technology, it is particularly urgent to develop a new type of fiber composite spiral rib hollow pipeline corridor for urban use. Summary of the Invention

[0007] The purpose of this application is to overcome at least one of the shortcomings of the existing technology and to provide a fiber composite spiral rib hollow pipe corridor for urban use. The pipe corridor, by adopting fiber composite materials and spiral rib hollow design, has excellent performance in structural stability, corrosion resistance and high temperature resistance, and has significant characteristics such as light weight, high ring stiffness, impact resistance and anti-cracking. It can effectively solve the shortcomings of traditional materials in construction cost, durability and construction difficulty. In addition, the fiber composite material has a light weight, which greatly reduces the difficulty of transportation and installation. The construction process does not need to rely on large equipment, significantly shortens the construction period and improves construction efficiency. In addition, the high water-tightness of the composite pipe corridor can effectively prevent water seepage in harsh underground environments, ensure the stability of the pipe corridor in long-term use, and reduce the cost and difficulty of later maintenance.

[0008] To achieve the above-mentioned purpose, the present application discloses a fiber composite material spiral rib hollow tunnel for urban use, which is in the shape of a hollow circular tube. From the inside to the outside, the tunnel comprises an inner flame retardant layer, an inner structural layer, a hollow layer, an outer structural layer, and a spiral rib layer, and each layer is bonded together. The tunnel is provided with at least one grid structural member along the axial direction, and the grid structural member divides the hollow space of the structural member into several installation positions along the axial direction; the flame retardant layer is composed of glass fiber yarn and / or basalt fiber yarn mixed with flame retardant resin and wound reciprocatingly; the inner structural layer and the outer structural layer are composed of glass fiber yarn and / or basalt fiber yarn mixed with resin and wound reciprocatingly; the hollow layer is composed of several hollow tubes bonded to the outer surface of the inner structural layer and arranged coaxially with the structural member; the spiral rib layer is composed of fiber strips spirally wound on the surface of the outer structural layer.

[0009] In some embodiments, a resin layer for bonding is provided between adjacent layers of the inner flame retardant layer, the inner structural layer, the hollow layer, the outer structural layer, and the spiral rib layer.

[0010] In some embodiments, the inner flame retardant layer has a thickness of 10 mm to 15 mm.

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

[0012] In some embodiments, the cross-section of the hollow tube is D-shaped, and the tube is distributed in an annular shape on the outer surface of the inner structural layer with the flat bottom surface as a reference to form a hollow layer.

[0013] In some embodiments, the hollow tube is made of fiber composite material.

[0014] In some embodiments, the spiral pitch of the fiber columns in the spiral rib layer is 50 to 100 mm.

[0015] In some embodiments, there are multiple grid structures with a spacing of 3 meters.

[0016] In some embodiments, the outer surface of the cell structure has a flame retardant layer.

[0017] In some embodiments, the fiber rod is formed by tightly gathering a plurality of glass fibers into a cylindrical shape.

[0018] Compared with the existing technology, the pipe gallery composed of the above structure has at least one of the following beneficial effects:

[0019] 1. Lightweight and high strength: The multi-layer structure design and the combination of hollow layers provide higher structural strength while reducing weight, making it suitable for use in urban pipeline corridors and reducing installation and transportation costs.

[0020] 2. Excellent flame retardant performance: The inner flame retardant layer composed of flame retardant resin and fiber materials, as well as the flame retardant layer on the cell structure, effectively improve the overall flame retardant performance and enhance safety.

[0021] 3. Thermal insulation: The design of the hollow layer and multi-layer structure can effectively insulate, prevent the impact of temperature changes on the internal equipment of the corridor, and improve the weather resistance and durability of the corridor.

[0022] 4. Strong corrosion resistance: The inner and outer structural layers are made of glass fiber yarn or basalt fiber yarn, which has good corrosion resistance, extends the service life, and adapts to the complex environment of urban pipeline corridors.

[0023] 5. High structural stability: The spiral rib layer enhances the stability of the outer layer and separates the hollow part through grid structural parts, effectively improving the rigidity and compressive resistance of the overall structure.

[0024] 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

[0025] 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:

[0026] Figure 1 It is a structural diagram of an embodiment disclosed in this application.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of an 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 、 2As shown, this embodiment describes in detail the specific structure and preparation method of a fiber composite spiral rib pipe corridor for urban pipe corridors. The pipe corridor is in the shape of a hollow circular tube and includes, from the inside to the outside, an inner flame retardant layer 1, an inner structural layer 2, a hollow layer 3, an outer structural layer 4, and a spiral rib layer 5. The layers are bonded together by resin to ensure the overall mechanical strength and structural stability. The pipe corridor is provided with a plurality of grid structures along the axial direction to divide the hollow part into several installation positions to improve the strength and stability of the overall structure, thereby better meeting the high requirements for structural performance in urban pipe corridors.

[0033] The inner flame-retardant layer 1 is made of glass fiber yarn and / or basalt fiber yarn using a double-winding process, mixed with a flame-retardant resin. First, a high-temperature-resistant resin (such as bisphenol A epoxy resin, which offers excellent heat resistance and mechanical strength) and a liquid flame retardant (such as aluminum tripolyphosphate, which significantly improves the material's flame retardancy and generates non-flammable gas when heated, further enhancing its fireproofing properties) are mixed in a 4:1 ratio. Appropriate amounts of a curing agent and accelerator are added and thoroughly stirred. The glass fiber yarn or basalt fiber yarn is then evenly coated with the resin using a prepreg machine and wound layer by layer onto the mold surface using a reciprocating winding process, ultimately forming an inner flame-retardant layer 1 with a thickness of 10 to 15 mm. This design ensures that the inner flame-retardant layer 1 possesses both excellent flame retardancy and high-temperature resistance, making it suitable for the complex environments of urban pipeline corridors. The thickness of the inner flame-retardant layer 1 is controlled between 10 and 15 mm to achieve an optimal balance between flame retardancy and mechanical strength. The flame retardant properties of the inner flame retardant layer 1 enable it to effectively slow down the spread of fire in the event of a fire, greatly improving the safety and reliability of the overall structure, which is particularly important in a narrow environment such as a pipe gallery where flammable materials may exist.

[0034] The inner structural layer 2 is located on the outside of the inner flame-retardant layer 1 and is made by mixing glass fiber yarn and / or basalt fiber yarn with resin using a reciprocating winding process. The thickness of the inner structural layer 2 is approximately 1-3% of the pipe diameter. During the specific preparation process, the glass fiber yarn or basalt fiber yarn is mixed with epoxy resin or ortho-phthalic unsaturated resin in a ratio of 3:1, and an appropriate amount of curing agent and accelerator are added. The fiber filaments are evenly coated with resin through a pre-preg device and evenly wound around the surface of the inner flame-retardant layer 1 using a reciprocating winding method to form an inner structural layer 2 of a certain thickness. Its main purpose is to provide the necessary mechanical strength and support for the overall structure. The inner structural layer 2 and the inner flame-retardant layer 1 are tightly bonded by the resin layer to ensure the consistency of mechanical properties and structural integrity between the two layers. The design of this layer further enhances the overall rigidity on the basis of effectively protecting the inner flame-retardant layer 1, allowing the pipeline to maintain a stable structural form when facing external pressure, avoiding deformation or structural failure. In addition, the presence of the inner structural layer 2 provides a further protective barrier for the overall structure, ensuring that the pipeline corridor can resist various stress factors in the environment during long-term use.

[0035] The hollow layer 3 is composed of a number of pultruded D-shaped pipe fittings 7, which are evenly arranged on the outer surface of the inner structural layer 2 to form a lightweight hollow structure. The specific preparation steps include placing the pultruded D-shaped pipe fittings 7 evenly on the surface of the inner structural layer 2 before the inner structural layer 2 is fully solidified, with the bottom plane of the pipe fittings 7 facing the inner structural layer 2 and the arc surface facing outward, so as to ensure the lightweight structural effect and reasonable mechanical properties of the hollow layer 3. These pipe fittings 7 are distributed in an annular manner on the outer surface of the inner structural layer 2 with the flat bottom surface as the reference, so that the hollow layer 3 can effectively reduce the weight of the pipeline while providing thermal insulation functions. The pipe fittings 7 are made of fiberglass and have excellent corrosion resistance and weather resistance. The design of the hollow layer 3 greatly improves the overall thermal insulation performance while ensuring the lightweight of the pipeline, so that the temperature fluctuations inside the pipeline corridor are effectively controlled, thereby reducing the impact of temperature changes on internal equipment. In addition, the design of the D-shaped pipe fitting 7 in the hollow layer 3 enables the pipeline to withstand stress in multiple directions, avoiding the deformation problem that may occur in the traditional round pipe fitting 7 under complex stress.

[0036] The outer structural layer 4, located outside the hollow layer 3, is made of a mixture of glass fiber yarn and / or basalt fiber yarn and resin. A reciprocating winding process is used to form a protective layer with a thickness of 5 to 10 mm. During the specific preparation process, the glass fiber yarn or basalt fiber yarn is mixed with resin, and an appropriate amount of curing agent and accelerator are added. The fibers are evenly coated with resin using a pre-preg device. The fibers are then evenly wound around the surface of the hollow layer 3 using a reciprocating winding process, forming an outer structural layer 4 of a certain thickness. The main function of the outer structural layer 4 is to provide additional mechanical strength and external protection for the pipeline corridor, ensuring long-term reliable use in complex environments. This layer's design effectively protects against mechanical damage, corrosion, and other factors in the external environment that may adversely affect the pipeline structure, thereby ensuring that the pipeline maintains stable structural performance during long-term use. The outer structural layer 4 not only enhances the overall strength of the pipeline corridor but also effectively extends its service life. This plays an important protective role, especially in harsh environments such as high humidity and high salt spray.

[0037] The spiral rib layer 5 is composed of several fiber bars 6 spirally wound on the surface of the outer structural layer 4, with a spiral pitch of 50 to 100 mm. In the specific preparation process, the glass fiber yarn or basalt fiber needs to be coated with resin through a pre-preg device, assembled into a cylindrical shape through a gathering mechanism, and the stretching speed and tension are controlled to ensure the diameter consistency and surface smoothness of the fiber bars 6. The fiber bars 6 are then wound in a spiral form on the surface of the outer structural layer 4 to form a spiral rib layer 5. The fiber bars 6 are formed by gathering glass fibers or basalt fibers and have high strength and toughness. The design of the spiral ribs significantly enhances the stability of the outer structural layer 4 and provides additional compressive strength, ensuring the stability and structural rigidity of the pipeline corridor when subjected to external forces. The spiral rib layer 5 not only enhances the compressive strength of the outer structural layer 4, but also increases the vibration resistance of the pipeline to a certain extent, so that the structure can still maintain good stability under external vibration, impact, etc. The design concept of spiral ribs comes from the multi-spiral structures in nature, such as the vines of plants. These spiral structures have excellent torsional resistance and flexibility. Therefore, introducing this structure into pipeline design can effectively improve the structural stability and adaptability of the pipeline.

[0038] The grid structure is made of metal I-beams or channel steels, which are rolled into a shape that matches the inner diameter of the inner flame retardant layer 1 and are embedded in the inner wall of the tunnel at a standard spacing of 3 meters. During the specific preparation process, the I-beams or channel steels need to be cut into suitable lengths and rolled into an arc-shaped structure that matches the inner diameter of the inner flame retardant layer 1. The outer surface of each grid structure is sprayed with fireproof material to further improve the overall fire resistance and safety. The function of the grid structure is to divide the hollow part into multiple independent installation positions, thereby enhancing the overall rigidity and pressure resistance, while also providing a convenient fixed position for wiring and equipment installation inside the tunnel. The fireproof design of the grid structure can effectively prevent the fire from spreading along the tunnel in the event of a fire, further enhancing the overall safety. The spacing design between each grid structure has been precisely calculated, which can not only provide sufficient structural support, but also provide sufficient spatial flexibility for the layout of equipment and lines inside the tunnel.

[0039] In this embodiment, the selection of materials and the design of each component fully consider the special use environment of the urban pipeline corridor, such as high temperature, corrosion, load and other factors. The glass fiber yarn and basalt fiber yarn materials used in the inner and outer structural layers 4 have excellent corrosion resistance, which effectively extends the service life of the structural parts. The application of flame retardant resin significantly improves the overall flame retardant performance and ensures the safety of use. In addition, the design of the hollow layer 3 not only reduces the weight of the structure, but also provides excellent thermal insulation performance, preventing temperature changes from adversely affecting the internal equipment of the pipeline corridor. Through the scientific selection and careful design of each layer of materials and structures, the entire structural component has multiple protection functions and can maintain its excellent performance in the harsh environment of urban pipeline corridors.

[0040] Through the above-mentioned structural design, the fiber composite spiral rib pipe gallery of this embodiment achieves light weight and high strength, excellent flame retardant performance, good thermal insulation effect, high corrosion resistance and structural stability. Especially in actual use scenarios, this structural member is suitable for urban pipe gallery environments that require lightweight and high strength, and can effectively reduce installation and transportation costs while improving overall safety and durability. In addition, the design of the spiral ribs enables the structural member to maintain structural integrity and stability when facing complex stress conditions, avoiding potential safety hazards caused by structural deformation or failure. In practical applications, such as underground cable corridors and water supply pipelines, the lightweight characteristics of this structural member can significantly reduce the difficulty of installation and maintenance, saving manpower and mechanical resources, while its excellent corrosion resistance and weather resistance ensure long-term safe operation and reduce maintenance costs and frequency.

[0041] By combining multiple advanced materials with innovative structural design, this embodiment not only represents a breakthrough in material selection but also demonstrates remarkable innovation and practicality in both structural design and functional implementation. By optimizing the bonding methods and thickness ratios between the layers, the functionality of each layer is maximized, while the overall structure achieves an ideal lightweight and high-strength effect. This comprehensive optimized design provides a reliable and efficient solution for the construction and maintenance of urban pipeline corridors, demonstrating the enormous potential of modern composite materials technology in infrastructure construction.

[0042] 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 spiral rib hollow pipe gallery for urban use, characterized by: The pipe gallery is in the shape of a hollow circular tube. From the inside to the outside, the pipe gallery comprises an inner flame retardant layer, an inner structural layer, a hollow layer, an outer structural layer, and a spiral rib layer. Each layer is bonded together. The pipe gallery is provided with at least one grid structural member along the axial direction, and the grid structural member divides the hollow space of the structural member into several installation positions along the axial direction; the flame retardant layer is composed of glass fiber yarn and / or basalt fiber yarn mixed with flame retardant resin and wound reciprocatingly; the inner structural layer and the outer structural layer are composed of glass fiber yarn and / or basalt fiber yarn mixed with resin and wound reciprocatingly; the hollow layer is composed of several hollow pipes bonded to the outer surface of the inner structural layer and arranged coaxially with the structural member; the spiral rib layer is composed of fiber strips spirally wound on the surface of the outer structural layer.

2. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: Adjacent layers of the inner flame retardant layer, the inner structural layer, the hollow layer, the outer structural layer and the spiral rib layer are provided with a resin layer for bonding.

3. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: The thickness of the inner flame retardant layer is 10 mm to 15 mm.

4. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: The thickness of the inner structural layer is 1-3% of the diameter of the structural component.

5. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: The cross section of the hollow pipe is D-shaped. The pipe is distributed in an annular shape on the outer surface of the inner structural layer with the flat bottom surface as a reference to form a hollow layer.

6. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: The hollow tube is made of fiber composite material.

7. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: The spiral pitch of the fiber columns in the spiral rib layer is 50 to 100 mm.

8. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that: There are multiple lattice structural members.

9. The urban fiber composite spiral rib hollow pipe gallery as claimed in claim 1, characterized in that The outer and / or inner surface of the cell structure has a flame retardant layer.

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