Fiber composite polypropylene pipe
By using a multi-layered structure design and fixed component connection of fiber composite polypropylene pipes, the problems of pipe stability and wear resistance in high-rise building water supply systems are solved, achieving efficient transportation and wear resistance, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI WEIXING NOVEL BUILDING MATERIAL
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-02
AI Technical Summary
In high-rise building water supply systems, the existing multi-layer composite pipe structure is unstable, prone to delamination, and has poor wear resistance, leading to leakage and shortened service life.
The pipe is designed with fiber composite polypropylene. There are fixed structures between the inner layer and the middle layer, and between the middle layer and the outer layer. The inner layer has internal convex ribs, and the outer layer has a wear-resistant surface. The layers are connected by fixed components. The internal convex ribs turbulent the flow to reduce resistance, and the wear-resistant surface improves wear resistance.
It enhances the structural stability and mechanical strength of the pipe, reduces fluid transport resistance, extends service life, improves wear resistance, and is suitable for high-pressure environments.
Smart Images
Figure CN224315650U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pipe technology, specifically relating to a fiber composite polypropylene pipe. Background Technology
[0002] In the water supply systems of high-rise buildings, the pipes on the ground floor need to withstand high water pressure, and ordinary pipe materials may not have sufficient pressure resistance to meet the requirements. In existing technologies, some multi-layer composite pipes improve performance by adding layers with different functions, but these have complex structures and the connections between layers are not stable enough, making them prone to delamination during use. This affects the overall performance and service life of the pipes. At the same time, the outer surface of the composite pipes is easily worn by particles, leading to pipe leaks and a shortened service life. Summary of the Invention
[0003] The purpose of this invention is to address the above-mentioned problems by providing a fiber composite polypropylene pipe.
[0004] To achieve the above objectives, this utility model adopts the following technical solution: a fiber composite polypropylene pipe, comprising a hollow pipe body, an inner layer on the inner side of the pipe body, a middle layer on the outer side of the inner layer, and an outer layer away from the inner layer in the middle layer. A fixing structure is provided between the inner and middle layers, and between the middle and outer layers. The inner layer has several internally protruding ribs on its circumferentially inner side, and the outer layer has a wear-resistant surface on its circumferentially outer side, with wear-resistant portions on the wear-resistant surface. The layered structure of the pipe body allows each layer to perform different functions; the fixing structure helps ensure the connection stability between layers; the internally protruding ribs improve fluid transport performance; and the wear-resistant surface and wear-resistant portions enhance the wear resistance of the pipe.
[0005] In the aforementioned fiber composite polypropylene pipe, a secondary inner layer is provided between the inner layer and the middle layer, and a secondary outer layer is provided between the middle layer and the outer layer, and the inner layer, the secondary inner layer, the middle layer, the secondary outer layer, and the outer layer are connected as an integral structure.
[0006] In the aforementioned fiber-reinforced polypropylene pipe, the inner ribs have a semi-circular structure and are arranged axially along the length of the pipe body and evenly distributed circumferentially. This design reduces the roughness of the inner surface of the pipe, which can play a turbulent role during transportation, reducing fluid turbulence within the pipe, lowering resistance during fluid transportation, improving transportation efficiency, and also helping to reduce fluid erosion of the inner wall, thus extending the service life of the pipe.
[0007] In the aforementioned fiber-reinforced polypropylene pipe, the fixing structure includes a first fixing component disposed on both sides of the innermost layer and a second fixing component disposed on both sides of the outermost layer. The pipe body consists of an inner layer, a second innermost layer, a middle layer, a second outermost layer, and an outer layer, forming a multi-layered structure that is integrated into one unit, and the layers are connected by the fixing structure.
[0008] In the aforementioned fiber composite polypropylene pipe, the first fixing component includes several inner layer fixing grooves circumferentially disposed on the side of the secondary inner layer near the inner layer, several inner layer fixing blocks corresponding to the inner layer fixing grooves are disposed on the outer side of the inner layer, several first middle layer fixing grooves are disposed circumferentially on the side of the secondary inner layer away from the inner layer, and several first middle layer fixing blocks corresponding to the first middle layer fixing grooves are disposed circumferentially on the side of the middle layer near the secondary inner layer.
[0009] In the aforementioned fiber-reinforced polypropylene pipe, the second fixing component includes several outer fixing grooves circumferentially arranged on the side of the secondary outer layer near the outer layer. The outer layer has several outer fixing blocks corresponding to the outer fixing grooves on its inner circumferential side. The secondary outer layer has several second middle layer fixing grooves circumferentially arranged on its side away from the outer layer, and the middle layer has several second middle layer fixing blocks corresponding to the second middle layer fixing grooves circumferentially arranged on its side near the secondary outer layer. The fixing grooves and fixing blocks in the first and second fixing components cooperate with each other, ensuring a tight connection between the layers, enhancing the overall structural stability and mechanical strength of the pipe, improving its resistance to deformation, and enabling it to withstand greater pressure and external forces.
[0010] In the aforementioned fiber composite polypropylene pipe, the wear-resistant part is provided with several axially inwardly recessed grooves in the circumferential direction, the bottom of the grooves is in contact with the wear-resistant surface, and the thickness of the wear-resistant part is less than or equal to the thickness of the outer layer.
[0011] In the aforementioned fiber-reinforced polypropylene pipe, a wear-resistant strip is provided between two adjacent grooves. The width of the groove is equal to or less than the width of the wear-resistant strip, and the length of the wear-resistant strip is equal to the length of the outer layer. The wear-resistant strip and the outer layer are integrally connected. This design gives the pipe excellent wear resistance, resisting friction and scratches from external objects. The combination of grooves and wear-resistant strips further enhances the wear resistance and increases the surface friction of the pipe, offering advantages in applications requiring anti-slip properties. It can be widely used in applications with high wear resistance requirements, effectively extending the pipe's service life and reducing maintenance costs.
[0012] In the aforementioned fiber-reinforced composite polypropylene pipe, the thickness of the inner layer accounts for 5-15% of the total wall thickness of the pipe body, the thickness of the middle layer accounts for 15-25% of the total wall thickness of the pipe body, and the thickness of the outer layer accounts for 15-20% of the total wall thickness of the pipe body. The inner layer is a silver-zinc antibacterial PP-R layer or a silver-zinc antibacterial PP-RCT layer, the middle layer is a PP-R layer or a PP-RCT layer, and the outer layer is a UV-resistant PP-R layer or a UV-resistant PP-RCT layer.
[0013] In the aforementioned fiber-reinforced polypropylene pipe, the thickness of the innermost layer and the outermost layer are equal, and the thickness of the innermost layer and the outermost layer each account for 15-20% of the total wall thickness of the pipe body. Both the innermost layer and the outermost layer are glass fiber reinforced PP-R layers or glass fiber reinforced PP-RCT layers. The proportions of the thickness of the inner layer, innermost layer, middle layer, outermost layer, and outermost layer to the total wall thickness of the pipe body are rationally designed. This thickness ratio optimizes the performance of the pipe body, enabling it to maintain structural strength while possessing good corrosion resistance, temperature resistance, and other comprehensive properties.
[0014] Compared with existing technologies, the advantages of this utility model are:
[0015] This device stabilizes the pipe body through a fixed structure, enhancing the overall structural stability and mechanical strength of the pipe and improving its resistance to deformation. Meanwhile, the internal ribs inside the pipe body reduce resistance during fluid transport and improve transport efficiency. At the same time, the wear-resistant parts on the outside of the pipe body can resist friction and scratches from external objects on the pipe surface, thereby effectively extending the service life of the pipe. Attached Figure Description
[0016] Figure 1 This is an exploded view of the structure of this utility model.
[0017] Figure 2 This is the front view of this utility model.
[0018] In the figure: Pipe body 1, inner layer 11, middle layer 12, outer layer 13, inner rib 14, secondary inner layer 15, secondary outer layer 16, fixing structure 2, first fixing component 21, second fixing component 22, inner fixing groove 23, inner fixing block 24, first middle layer fixing groove 25, first middle layer fixing block 26, outer fixing groove 27, outer fixing block 28, second middle layer fixing groove 29, second middle layer fixing block 30, wear-resistant surface 3, wear-resistant part 31, groove 32, wear-resistant strip 33. Detailed Implementation
[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0020] like Figure 1-2 As shown, a fiber-reinforced composite polypropylene pipe includes a hollow pipe body 1. An inner layer 11 is located inside the pipe body 1, a middle layer 12 is located outside the inner layer 11, and an outer layer 13 is located away from the inner layer 11 in the middle layer 12. A fixing structure 2 is provided between the inner layer 11 and the middle layer 12, and between the middle layer 12 and the outer layer 13. The inner layer 11 has several inwardly protruding ribs 14, and the outer layer 13 has a wear-resistant surface 3, with wear-resistant portions 31 on the wear-resistant surface 3. The layered structure of the pipe body 1 allows each layer to perform different functions. The fixing structure 2 helps ensure the connection stability between the layers. The inwardly protruding ribs 14 improve fluid transport performance, and the wear-resistant surface 3 and wear-resistant portions 31 enhance the wear resistance of the pipe.
[0021] Combination Figure 1 and Figure 2 As shown, a secondary inner layer 15 is provided between the inner layer 11 and the middle layer 12, and a secondary outer layer 16 is provided between the middle layer 12 and the outer layer 13. The inner layer 11, the secondary inner layer 15, the middle layer 12, the secondary outer layer 16 and the outer layer 13 are connected as an integral structure.
[0022] The inner rib 14 has a semi-circular structure and is arranged axially along the length of the pipe body 1 and evenly distributed circumferentially. This design can reduce the roughness of the inner surface of the pipe, which can play a turbulent role during transportation, reduce the turbulence of the fluid in the pipe, reduce the resistance during fluid transportation, improve the transportation efficiency, and at the same time help reduce the scouring of the inner wall of the inner layer 11 by the fluid, thus extending the service life of the pipe.
[0023] Specifically, the fixing structure 2 includes a first fixing component 21 disposed on both sides of the innermost layer 15 and a second fixing component 22 disposed on both sides of the outermost layer 16. The pipe body 1 is composed of an inner layer 11, an innermost layer 15, a middle layer 12, an outermost layer 16 and an outer layer 13, forming a multi-layer structure that is connected as one unit, and the layers are connected by the fixing structure 2.
[0024] Furthermore, the first fixing component 21 includes a plurality of inner layer fixing grooves 23 circumferentially disposed on the side of the secondary inner layer 15 near the inner layer 11, a plurality of inner layer fixing blocks 24 corresponding to the inner layer fixing grooves 23 are provided on the outer side of the inner layer 11, a plurality of first middle layer fixing grooves 25 are provided circumferentially on the side of the secondary inner layer 15 away from the inner layer 11, and a plurality of first middle layer fixing blocks 26 corresponding to the first middle layer fixing grooves 25 are provided circumferentially on the side of the middle layer 12 near the secondary inner layer 15.
[0025] Furthermore, the second fixing component 22 includes several outer fixing grooves 27 circumferentially disposed on the side of the secondary outer layer 16 near the outer layer 13. The outer layer 13 has several outer fixing blocks 28 corresponding to the outer fixing grooves 27 on its inner circumferential side. The secondary outer layer 16 has several second middle layer fixing grooves 29 circumferentially disposed on the side away from the outer layer 13, and the middle layer 12 has several second middle layer fixing blocks 30 corresponding to the second middle layer fixing grooves 29 circumferentially disposed on the side of the middle layer 12 near the secondary outer layer 16. The fixing grooves and fixing blocks in the first fixing component 21 and the second fixing component 22 cooperate with each other, ensuring a tight connection between the layers, enhancing the overall structural stability and mechanical strength of the pipe, improving the pipe's resistance to deformation, and enabling it to withstand greater pressure and external forces.
[0026] Meanwhile, the wear-resistant part 31 is provided with a number of axially recessed grooves 32 in the circumferential direction. The bottom of the grooves 32 is in contact with the wear-resistant surface 3, and the thickness of the wear-resistant part 31 is less than or equal to the thickness of the outer layer 13.
[0027] Clearly, a wear-resistant strip 33 is provided between two adjacent grooves 32. The width of the groove 32 is equal to or less than the width of the wear-resistant strip 33, and the length of the wear-resistant strip 33 is equal to the length of the outer layer 13. The wear-resistant strip 33 and the outer layer 13 are integrally connected. This design gives the pipe excellent wear resistance, resisting friction and scratches from external objects on the pipe surface. The combination of the groove 32 and the wear-resistant strip 33 further improves the wear resistance and increases the friction on the pipe surface, offering advantages in applications requiring anti-slip properties. It can be widely used in situations with high wear resistance requirements, effectively extending the pipe's service life and reducing maintenance costs.
[0028] like Figure 2 As shown, the thickness of the inner layer 11 accounts for 5-15% of the total wall thickness of the pipe body 1, the thickness of the middle layer 12 accounts for 15-25% of the total wall thickness of the pipe body 1, and the thickness of the outer layer 13 accounts for 15-20% of the total wall thickness of the pipe body 1. The inner layer 11 is a silver-zinc antibacterial PP-R layer or a silver-zinc antibacterial PP-RCT layer, the middle layer 12 is a PP-R layer or a PP-RCT layer, and the outer layer 13 is a UV-resistant PP-R layer or a UV-resistant PP-RCT layer.
[0029] The innermost layer 15 and the outermost layer 16 have equal thicknesses, and their thicknesses account for 15-20% of the total wall thickness of the pipe body 1, respectively. Both the innermost layer 15 and the outermost layer 16 are glass fiber reinforced PP-R or glass fiber reinforced PP-RCT layers. The proportions of the thicknesses of the inner layer 11, the innermost layer 15, the middle layer 12, the outermost layer 16, and the outermost layer 13 to the total wall thickness of the pipe body 1 are rationally designed. This thickness ratio optimizes the performance of the pipe body 1, enabling it to maintain structural strength while possessing good comprehensive properties such as corrosion resistance and temperature resistance.
[0030] The principle of this embodiment is as follows:
[0031] The first fixing component 21 and the second fixing component 22 ensure that each layer is relatively fixed in the axial and circumferential directions, thus guaranteeing the stability of the pipe body 1 structure. When subjected to external forces such as pressure and tension, each layer can work together, improving the overall performance of the pipe body 1. The inner rib 14 in the inner layer 11 can change the flow field characteristics of the inner surface of the pipe, causing disturbance to the fluid and improving the conveying efficiency. At the same time, the inner rib 14 can also enhance the structural strength of the inner layer 11 to a certain extent, preventing the inner layer 11 from deforming under the action of fluid pressure. The wear-resistant part 31 on the outer layer 13 can effectively resist friction and improve the service life of the pipe body 1.
[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
[0033] Although this document frequently uses terms such as pipe body 1, inner layer 11, middle layer 12, outer layer 13, inner rib 14, secondary inner layer 15, secondary outer layer 16, fixing structure 2, first fixing component 21, second fixing component 22, inner fixing groove 23, inner fixing block 24, first middle layer fixing groove 25, first middle layer fixing block 26, outer layer fixing groove 27, outer layer fixing block 28, second middle layer fixing groove 29, second middle layer fixing block 30, wear-resistant surface 3, wear-resistant part 31, groove 32, and wear-resistant strip 33, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.
Claims
1. A fiber-reinforced composite polypropylene pipe, comprising a hollow pipe body (1), characterized in that, The inner side of the pipe body (1) is provided with an inner layer (11), the outer side of the inner layer (11) is provided with a middle layer (12), the middle layer (12) is provided with an outer layer (13) away from the inner layer (11), a fixing structure (2) is provided between the inner layer (11) and the middle layer (12) and between the middle layer (12) and the outer layer (13), the inner layer (11) is provided with a plurality of inner protruding ribs (14) in the circumferential direction, the outer layer (13) is provided with a wear-resistant surface (3) in the circumferential direction, and a wear-resistant part (31) is provided on the wear-resistant surface (3).
2. The fiber-reinforced composite polypropylene pipe according to claim 1, characterized in that, A secondary inner layer (15) is provided between the inner layer (11) and the middle layer (12), and a secondary outer layer (16) is provided between the middle layer (12) and the outer layer (13). The inner layer (11), the secondary inner layer (15), the middle layer (12), the secondary outer layer (16), and the outer layer (13) are connected as an integral structure.
3. The fiber-reinforced composite polypropylene pipe according to claim 1, characterized in that, The inner bulge (14) has a semi-circular structure and is arranged along the length axis of the pipe body (1) and is evenly distributed circumferentially.
4. A fiber-reinforced composite polypropylene pipe according to claim 2 or 3, characterized in that, The fixing structure (2) includes a first fixing component (21) disposed on both sides of the innermost layer (15) and a second fixing component (22) disposed on both sides of the outermost layer (16).
5. The fiber-reinforced composite polypropylene pipe according to claim 4, characterized in that, The first fixing component (21) includes several inner layer fixing grooves (23) arranged circumferentially on the side of the secondary inner layer (15) near the inner layer (11). The inner layer (11) is provided with several inner layer fixing blocks (24) corresponding to the inner layer fixing grooves (23) on its outer circumferential side. The secondary inner layer (15) is provided with several first middle layer fixing grooves (25) on its side away from the inner layer (11). The middle layer (12) is provided with several first middle layer fixing blocks (26) corresponding to the first middle layer fixing grooves (25) on its side near the secondary inner layer (15).
6. The fiber-reinforced composite polypropylene pipe according to claim 4, characterized in that, The second fixing component (22) includes several outer fixing grooves (27) arranged circumferentially on the side of the secondary outer layer (16) near the outer layer (13), several outer fixing blocks (28) corresponding to the outer fixing grooves (27) are provided on the inner side of the outer layer (13), several second middle layer fixing grooves (29) are arranged circumferentially on the side of the secondary outer layer (16) away from the outer layer (13), and several second middle layer fixing blocks (30) corresponding to the second middle layer fixing grooves (29) are arranged circumferentially on the side of the middle layer (12) near the secondary outer layer (16).
7. The fiber-reinforced composite polypropylene pipe according to claim 1, characterized in that, The wear-resistant part (31) is provided with a plurality of axially recessed grooves (32) in the circumferential direction. The bottom of the grooves (32) is in contact with the wear-resistant surface (3), and the thickness of the wear-resistant part (31) is less than or equal to the thickness of the outer layer (13).
8. The fiber-reinforced composite polypropylene pipe according to claim 7, characterized in that, A wear-resistant strip (33) is provided between two adjacent grooves (32). The width of the groove (32) is equal to or less than the width of the wear-resistant strip (33). The length of the wear-resistant strip (33) is equal to the length of the outer layer (13). The wear-resistant strip (33) and the outer layer (13) are integrated.
9. A fiber-reinforced composite polypropylene pipe according to claim 2, characterized in that, The thickness of the inner layer (11) accounts for 5-15% of the total wall thickness of the pipe body (1), the thickness of the middle layer (12) accounts for 15-25% of the total wall thickness of the pipe body (1), and the thickness of the outer layer (13) accounts for 15-20% of the total wall thickness of the pipe body (1).
10. A fiber-reinforced composite polypropylene pipe according to claim 2, characterized in that, The thickness of the innermost layer (15) and the outermost layer (16) is equal, and the thickness of the innermost layer (15) and the outermost layer (16) accounts for 15-20% of the total wall thickness of the pipe body (1).