Composite pipeline and manufacturing method thereof
By designing a multi-layer fiber composite layer and mechanical occlusion structure in the composite pipe, the shortcomings in the existing composite pipes in terms of mechanical properties, stability and reliability are solved, and higher lightweight and high-performance effects are achieved.
Patent Information
- Application Number
- CN202510355475.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-06-13
AI Technical Summary
The existing composite pipelines still have room for improvement in overall mechanical performance, stability and reliability, and it is difficult to meet the needs of lightweight and high performance.
A composite pipe is designed, which includes a lined tube, a wear-resistant sleeve, a connecting sleeve and a multi-layer fiber composite layer. By wrapping the first fiber composite layer on the outer wall of the inner liner tube and hooking the second fiber composite layer on the connecting sleeve, a mechanical choke is formed to enhance connection stability.
By optimizing the structure of the composite pipeline, its overall mechanical properties, stability and reliability are significantly improved, and it can bear radial and axial loads more effectively and improve its torsion resistance.
Smart Images
Figure CN120140534A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of material conveying pipelines, and particularly relates to a composite pipeline and a manufacturing method thereof. Background Art
[0002] For some existing material conveying pipelines, such as concrete conveying pipes, there is an increasing demand for lightweight. Fiber-reinforced resin-based composites (hereinafter referred to as "fiber composites") have gradually become the mainstream direction for the lightweight design and manufacturing of material conveying pipelines due to their advantages such as high specific strength, high specific modulus, good fatigue resistance, and strong designability.
[0003] However, due to its own characteristics, fiber composites cannot have the same diversity in connection methods as other materials such as metal materials. Therefore, in order to take into account factors such as the choice of connection methods and practicality, composite pipelines made by combining fiber composites with other materials are usually adopted.
[0004] However, there is still great room for improvement in the overall mechanical properties, stability, and reliability of existing composite pipelines. Therefore, it is necessary to optimize the structure of composite pipelines at this stage. Summary of the Invention
[0005] The purpose of this application is to provide a composite pipeline and a manufacturing method thereof, which can optimize the pipeline structure to improve the overall mechanical properties, stability, and reliability.
[0006] To achieve the above purpose, on the one hand, this application provides a composite pipeline, which includes:
[0007] Inner lining pipe;
[0008] Wear-resistant sleeve, axially butted with the inner lining pipe;
[0009] Connection sleeve, including a connection sleeve body and a plurality of protruding units spaced apart from each other and arranged on the outer peripheral wall of the connection sleeve body. The connection sleeve body is sleeved on the end of the inner lining pipe and also sleeved on the wear-resistant sleeve;
[0010] First fiber composite layer, wound around the outer peripheral wall of the inner lining pipe; and
[0011] Second fiber composite layer, wound around the outer part of the first fiber composite layer and wound around the outer peripheral wall of the connection sleeve body by hooking around a plurality of the protruding units. The fiber winding angle of the second fiber composite layer is not greater than the fiber winding angle of the first fiber composite layer.
[0012] In some embodiments, the radial thickness of the first fiber composite layer is t f1 , and it satisfies:
[0013]
[0014] wherein, d 1 is the outer diameter of the inner liner pipe, [σ] is the preset maximum circumferential stress allowed for the first fiber composite layer, and P C is the preset working internal pressure of the composite pipe.
[0015] In some embodiments, the plurality of protruding units form a plurality of protruding structure groups, and the plurality of protruding structure groups are arranged at intervals in sequence along the axial direction of the connecting sleeve body, and the plurality of protruding units in the same protruding structure group are arranged at intervals in sequence along the circumferential direction of the connecting sleeve body.
[0016] In some embodiments, the radial thickness of the second fiber composite layer is t f2 , and it satisfies:
[0017]
[0018] wherein, d 2 is the outer diameter of the connecting sleeve body, d 3 is the outer diameter of the protruding unit, n 1 is the number of the protruding structure groups in a single connecting sleeve, P T is the preset shear strength of a single protruding unit, η is the preset loss coefficient, B is the preset fiber yarn width of the second fiber composite layer, P L is the preset tensile strength of the fiber yarn of the second fiber composite layer, and α is the preset fiber winding angle of the second fiber composite layer.
[0019] In some embodiments, the number of the protruding structure groups in a single connecting sleeve is n 1 , and it satisfies:
[0020] wherein, d 1 is the outer diameter of the inner liner pipe, d 2 is the outer diameter of the connecting sleeve body, d 3 is the outer diameter of the protruding unit, P C is the preset working internal pressure of the composite pipe, P T is the preset shear strength of a single protruding unit, P J is the interfacial shear strength between the fiber yarn of the second fiber composite layer and the connecting sleeve body, B is the preset fiber yarn width of the second fiber composite layer, and α is the preset fiber winding angle of the second fiber composite layer.
[0021] In some embodiments, the number of the protruding units in a single protruding structure group is n 2 , and it satisfies: n 2 = πd 2 / B;
[0022] wherein, d 2 is the outer diameter of the connection sleeve body, and B is the preset fiber yarn width of the second fiber composite layer.
[0023] In some embodiments, the composite pipeline further includes a third fiber composite layer wound around the outer periphery of the second fiber composite layer. The end of the third fiber composite layer hooks around a plurality of the convex units, and the fiber winding angle of the second fiber composite layer is not greater than that of the third fiber composite layer.
[0024] In some embodiments, the composite pipeline further includes a fourth fiber composite layer wound around the outer peripheral area of the third fiber composite layer corresponding to the connection sleeve body. The fourth fiber composite layer hooks around a plurality of the convex units, and the fiber winding angle of the second fiber composite layer is not greater than that of the fourth fiber composite layer.
[0025] In some embodiments, the first fiber composite layer, the second fiber composite layer, the third fiber composite layer and the fourth fiber composite layer are continuously and sequentially wound and formed.
[0026] In some embodiments, two connection sleeve bodies are respectively sleeved on two ends of the inner liner tube. Two ends of the second fiber composite layer are respectively wound around the outer peripheral walls of the two connection sleeve bodies by hooking around the convex units on the two connection sleeve bodies.
[0027] The second aspect of the present application also provides a manufacturing method of a composite pipeline, which includes:
[0028] Assemble the inner liner tube, the wear-resistant sleeve and the connection sleeve, so that the wear-resistant sleeve is axially butted with the inner liner tube, and the connection sleeve body of the connection sleeve is sleeved on the end of the inner liner tube and also sleeved on the wear-resistant sleeve;
[0029] Wind and form a first fiber composite layer on the outer peripheral wall of the inner liner tube;
[0030] Wind and form a second fiber composite layer on the outer periphery of the first fiber composite layer and the outer peripheral wall of the connection sleeve body. Wherein, the second fiber composite layer hooks around a plurality of convex units arranged at intervals on the outer peripheral wall of the connection sleeve body, and the fiber winding angle of the second fiber composite layer is not greater than that of the first fiber composite layer;
[0031] Cure all the fiber composite layers in the composite pipeline.
[0032] In some embodiments, the manufacturing method further includes:
[0033] A third fiber composite layer is wound and formed on the outer peripheral portion of the second fiber composite layer. Wherein, the end portion of the third fiber composite layer hooks around a plurality of the protruding units, and the fiber winding angle of the second fiber composite layer is not greater than the fiber winding angle of the third fiber composite layer.
[0034] In some embodiments, the manufacturing method further includes:
[0035] A fourth fiber composite layer is wound and formed on the outer peripheral portion area of the third fiber composite layer corresponding to the connection sleeve body. Wherein, the fourth fiber composite layer hooks around a plurality of the protruding units, and the fiber winding angle of the second fiber composite layer is not greater than the fiber winding angle of the fourth fiber composite layer.
[0036] Through the above technical solution, when the composite pipeline of the present application conveys materials such as concrete, the materials flow in the inner lining pipe, so an impact will be formed on the peripheral wall of the inner lining pipe. The first fiber composite layer is wound around the outer peripheral wall of the inner lining pipe and has a relatively large fiber winding angle, which can bear more radial loads and effectively reduce the risk of the inner lining pipe bursting. In addition, the fiber winding angle of the second fiber composite layer is relatively small. By hooking around a plurality of protruding units in the connection sleeve and winding around the outer peripheral wall of the connection sleeve body, the second fiber composite layer can form a mechanical bite with the connection sleeve, so that the second fiber composite layer can apply an axial tensile force to the connection sleeve body, greatly improving the connection stability between the connection sleeve body and the inner lining pipe. Moreover, the torque borne by the connection sleeve body can be transmitted to the second fiber composite layer through a plurality of protruding units. Thus, the second fiber composite layer can bear the axial and torque loads of the composite pipeline, improving the axial load capacity and torsional resistance of the composite pipeline. Not only that, the second fiber composite layer is wound around the outer peripheral portion of the first fiber composite layer, which can strengthen the stability of the first fiber composite layer. It can be seen that by optimizing the structure of the composite pipeline, the overall mechanical properties, stability and reliability of the present application can be effectively improved.
[0037] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiment part. Brief Description of the Drawings
[0038] The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:
[0039] Figure 1 is a partial cross-sectional view of a composite pipeline in a specific embodiment of the present application;
[0040] Figure 2 is Figure 1 a schematic view of a partial structure of the composite pipe in
[0041] Figure 3 is Figure 2 sectional view A-A of
[0042] Figure 4 is Figure 1 a schematic view of the connecting sleeve in
[0043] Figure 5 is Figure 4 sectional view B-B of
[0044] Figure 6 is Figure 1 a schematic view of the wear-resistant sleeve in
[0045] Description of reference numerals
[0046] 1 Inner liner pipe 2 Fiber composite structure
[0047] 3 Connecting sleeve 4 Wear-resistant sleeve
[0048] 21 First fiber composite layer 22 Second fiber composite layer
[0049] 23 Third fiber composite layer 24 Fourth fiber composite layer
[0050] 31 Connecting sleeve body 32 Protrusion unit Detailed implementation manners
[0051] The following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application.
[0052] Referring to Figures 1 to 6 , the first exemplary embodiment of the present application provides a composite pipe, which includes:
[0053] Inner liner pipe 1;
[0054] Connecting sleeve 3, including a connecting sleeve body 31 sleeved on the end of the inner liner pipe 1 and a plurality of protrusion units 32 arranged at intervals on the outer peripheral wall of the connecting sleeve body 31;
[0055] First fiber composite layer 21, wound around the outer peripheral wall of the inner liner pipe 1; and
[0056] The second fiber composite layer 22 is wound around the outer periphery of the first fiber composite layer 21 and is wound around the outer peripheral wall of the connecting sleeve body 31 by hooking around a plurality of protrusion units 32 , and the fiber winding angle of the second fiber composite layer 22 is not greater than the fiber winding angle of the first fiber composite layer 21 .
[0057] It should be noted that, in this article, the fiber winding angle of the fiber composite layer refers to the angle between the fiber yarn of the fiber composite layer and the axial direction of the inner liner tube 1. When the fiber winding angle of the fiber composite layer is smaller, the fiber composite layer bears more axial load and less radial load; when the fiber winding angle of the fiber composite layer is larger, the fiber composite layer bears less axial load and more radial load.
[0058] Through the above-mentioned arrangement, when the composite pipe of the present application transports materials such as concrete, the material flows in the inner liner pipe 1, thereby impacting the peripheral wall of the inner liner pipe 1, and the first fiber composite layer 21 is wound around the outer peripheral wall of the inner liner pipe 1 and has a relatively large fiber winding angle, which can bear more radial loads and can effectively reduce the risk of the inner liner pipe bursting.
[0059] In addition, the fiber winding angle of the second fiber composite layer 22 is relatively small. By hooking the second fiber composite layer 22 around the multiple protrusion units 32 in the connecting sleeve 3 to be wound around the outer peripheral wall of the connecting sleeve body 31, the second fiber composite layer 22 can form a mechanical bite with the connecting sleeve 3, so that the second fiber composite layer 22 can apply axial tension to the connecting sleeve body 31, which greatly improves the connection stability between the connecting sleeve body 31 and the inner liner pipe 1, and the torque borne by the connecting sleeve body 31 can be transmitted to the second fiber composite layer 22 through the multiple protrusion units 32, so that the second fiber composite layer 22 can bear the axial and torque loads of the composite pipe, and improve the axial load capacity and torsion resistance of the composite pipe. Moreover, the second fiber composite layer 22 is wound around the outer periphery of the first fiber composite layer 21, which can enhance the stability of the first fiber composite layer 21.
[0060] When multiple composite pipes are connected to form a pipe assembly, adjacent composite pipes are connected by connecting sleeve bodies 31. To ensure the connection stability, the connecting sleeve body 31 is usually made of a material with greater strength (such as metal material, etc.). Therefore, for the composite pipe, the connecting sleeve body 31 can provide a stronger radial load capacity at the position where the inner liner pipe 1 is connected. Therefore, the first fiber composite layer 21 of the present application only needs to be wrapped around the outer circumferential wall of the inner liner pipe 1, and does not need to be wrapped around the outer circumferential wall of the connecting sleeve body 31, which can reduce the winding area of the first fiber composite layer 21 and save its material and cost.
[0061] In summary, by optimizing the structure of the composite pipeline, the overall mechanical properties, stability and reliability of the present application can be effectively improved. At the same time, the material and cost of the first fiber composite layer 21 can be saved.
[0062] In some embodiments, considering that the inner liner 1 will gradually wear and become thinner or even worn through during use and hardly bear the radial load in the later stage of use, in order to ensure the load-bearing performance of the composite pipeline, it is specifically designed in this embodiment that the radial load of the composite pipeline is basically borne by the first fiber composite layer 21. According to the calculation formula of the thick-walled cylinder in material mechanics, the radial thickness t of the first fiber composite layer 21 can be determined. f1 .
[0063] Specifically, it satisfies: where d 1 is the outer diameter of the inner liner 1, [σ] is the preset maximum circumferential stress allowed for the first fiber composite layer 21, and P V is the preset working internal pressure of the composite pipeline.
[0064] In contrast, the composite pipelines in the prior art only qualitatively indicate that the fiber composite layer can improve the load-bearing and explosion-proof performance of the pipeline, but do not give a clear and standardized design method. Empirical design is likely to result in an overly thick or insufficient thickness of the fiber composite layer, leading to an unobvious lightweight effect of the composite pipeline or an inability to meet the required load-bearing and explosion-proof performance requirements.
[0065] However, in this embodiment, by providing a calculation method for the radial thickness t of the first fiber composite layer 21, the design is more standardized and accurate, and can more significantly improve the radial load capacity and lightweight effect of the composite pipeline. f1
[0066] In some embodiments, the convex unit 32 and the connecting sleeve body 31 are formed as an integral structure. For example, the convex unit 32 can be welded and planted on the outer peripheral wall of the connecting sleeve body 31, or can be integrally formed with the connecting sleeve body 31, etc.
[0067] By adopting the structure in which the convex unit 32 is integrally connected to the connecting sleeve body 31, there is no need to open holes on the connecting sleeve body 31, which will not affect the strength of the connecting sleeve body 31, and the connection stability between the convex unit 32 and the connecting sleeve body 31 is relatively strong, enabling the convex unit 32 to have a stronger load-bearing capacity.
[0068] In some embodiments, referring to Figure 2 and Figure 3 , a plurality of convex units 32 can form a plurality of convex structure groups. Among them, the plurality of convex structure groups are arranged at intervals in the axial direction of the connecting sleeve body 31 (for example, arranged at equal intervals in sequence), and the plurality of convex units 32 in the same convex structure group are arranged at intervals in the circumferential direction of the connecting sleeve body 31 (for example, arranged at equal intervals in sequence).
[0069] With the arrangement of this embodiment, the arrangement area of the multiple convex units 32 on the outer peripheral wall of the connecting sleeve body 31 is large and regularly arranged, which is more convenient for fiber yarn winding. Moreover, the second fiber composite layer 22 forms mechanical engagement with more convex units 32, and the area wound on the outer peripheral wall of the connecting sleeve body 31 is larger, so that the axial load and torsional resistance can be further improved.
[0070] It should be noted that when the composite pipeline of the present application conveys materials such as concrete, the axial force generated by the internal pressure in the inner liner 1 at both ends of the inner liner 1 will be transmitted to the second fiber composite layer 22 through the convex units 32 in the connecting sleeve 3, and the shear force received by the connecting sleeve 3 is also borne by the second fiber composite layer 22. Therefore, according to the force analysis, the following two groups of relational expressions can be obtained:
[0071] F 纤 +F 剪 ≥F 承 ; F 凸 ≥F 纤 ; —①
[0072] F 凸 +F 剪 ≥F 承 ; F 纤 ≥F 凸 ; —②
[0073] In the relational expressions ① and ②, F 纤 represents the axial tensile force that the second fiber composite layer 22 can withstand, F 剪 represents the interfacial shear force between the fiber yarn of the second fiber composite layer 22 and the connecting sleeve body 31, F 承 represents the vector sum of the axial and torque loads received by the composite pipeline, F 凸 represents the axial tensile force that the convex unit 32 can withstand.
[0074] For the relational expression ①, when F 纤 +F 剪 ≥F 承 , it means that the vector sum of the axial tensile force that the second fiber composite layer 22 can withstand and the interfacial shear force between the fiber yarn of the second fiber composite layer 22 and the connecting sleeve body 31 is greater than or equal to the vector sum of the axial and torque loads received by the composite pipeline. Therefore, neither the second fiber composite layer 22 nor the convex unit 32 will be damaged at this time. When F 纤 +F 剪 <F 承 , it means that the vector sum of the axial and torque loads received by the composite pipeline exceeds the limit. At this time, since F 凸 ≥F 纤 , the second fiber composite layer 22 will be damaged.
[0075] For relation ②, when F 凸 + F 剪 ≥ F 承 , it means that the vector sum of the axial tensile force that the convex unit 32 can withstand and the interfacial shear force between the fiber yarns of the second fiber composite layer 22 and the connecting sleeve body 31 is greater than or equal to the vector sum of the axial and torsional loads received by the composite pipeline. Therefore, neither the second fiber composite layer 22 nor the convex unit 32 will be damaged at this time. When F 凸 + F 剪 <F 承 , it means that the vector sum of the axial and torsional loads received by the composite pipeline exceeds the limit. At this time, since F 纤 ≥ F 凸 , the convex unit 32 will be damaged.
[0076] Since the load-bearing capacity of the convex unit 32 is limited by materials and layout space, etc., it is more difficult to improve than that of the second fiber composite layer 22 (the load-bearing capacity of the fiber composite layer can be improved by increasing the radial thickness). Therefore, if F 纤 + F 剪 ≥ F 承 in relation ① is used as the basis to design the radial thickness of the second fiber composite layer 22, then since it is necessary to further ensure F 凸 ≥ F 纤 , it will be difficult to ensure that the load-bearing capacity of the convex unit 32 can be made greater than or equal to that of the second fiber composite layer 22 by adjusting materials and layout space, etc. later.
[0077] If the radial thickness of the second fiber composite layer 22 is designed based on F 纤 ≥ F 凸 in relation ②, the radial thickness of the second fiber composite layer 22 can be calculated while ensuring that the load-bearing capacity of the convex unit 32 is sufficient. The load-bearing capacity of the second fiber composite layer 22 can be simply achieved by increasing its radial thickness.
[0078] Therefore, it is a preferred solution of this application to design the radial thickness of the second fiber composite layer 22 and the number of convex units 32 based on F 纤 ≥ F 凸 in relation ②.
[0079] In some embodiments, based on the foregoing analysis, through F 纤 ≥ F 凸 in relation ②, the radial thickness t f2 of the second fiber composite layer 22 can be deduced to satisfy: Where, d 2 is the outer diameter of the connecting sleeve body 31, d 3 is the outer diameter of the convex unit 32, n 1n is the number of the raised structure groups in a single connecting sleeve 3 (which can be preset or obtained by calculation according to the embodiments provided hereinafter), P T is the preset shear strength of a single raised unit 32, η is the preset loss coefficient, B is the preset fiber yarn width of the second fiber composite layer 22, P L is the preset tensile strength of the fiber yarns of the second fiber composite layer 22, and α is the preset fiber winding angle of the second fiber composite layer 22.
[0080] In practical applications, for example, the number n of the raised structure groups in a single connecting sleeve 3 can be set 1 to be not less than 5 (preferably 11), and the shear strength P of a single raised unit 32 can be set T to be not less than 1000 Mpa, etc.
[0081] In contrast, the composite pipes in the prior art only qualitatively indicate that the fiber composite layer can improve the load-bearing performance of the pipes, but do not give a clear and standardized design method. Empirical design is likely to result in an over-thick or insufficient thickness of the fiber composite layer, leading to an unobvious lightweight effect of the composite pipes or an inability to meet the required load-bearing performance requirements.
[0082] However, in this embodiment, by providing the calculation method for the radial thickness t of the second fiber composite layer 22 f2 the design is more standardized and accurate, and can more significantly improve the axial and torque load-bearing capacities and the lightweight effect of the composite pipes.
[0083] In some embodiments, the number n of the raised structure groups in a single connecting sleeve 3 can also be derived through F 凸 +F 剪 ≥F 承 in relation formula ②, satisfying: 1 wherein, d is the outer diameter of the inner liner pipe 1, d 1 is the outer diameter of the connecting sleeve body 31, d 2 is the outer diameter of the raised unit 32, P 3 is the preset working internal pressure of the composite pipe, P C is the preset shear strength of a single raised unit 32, P T is the interfacial shear strength between the fiber yarns of the second fiber composite layer 22 and the connecting sleeve body 31, B is the preset fiber yarn width of the second fiber composite layer 22, and α is the preset fiber winding angle of the second fiber composite layer 22. J In practical applications, for example, the number n of the raised structure groups in a single connecting sleeve 3 can be set
[0084] to be not less than 5 (preferably 11), and the shear strength P of a single raised unit 32 can be set 1 to be not less than 5 (preferably 11), and the shear strength P of a single raised unit 32 can be set TNot less than 1000 Mpa, etc.
[0085] It can be seen that this embodiment provides a calculation method for the number n of the raised structure groups in a single connecting sleeve 3 1 The design is more standardized and accurate, which can more significantly improve the bearing capacity of the connecting sleeve 3, avoid excessive material consumption caused by too many raised structure groups, and avoid insufficient bearing capacity caused by too few raised structure groups.
[0086] In some embodiments, the distance between any two adjacent raised units 32 can be set not to be greater than the fiber yarn width of the second fiber composite layer 22, so that the interval area between any two adjacent raised units 32 is covered by the fiber yarn of the second fiber composite layer 22.
[0087] It can be seen that this embodiment provides a solution that can quantify the relationship between the distance between any two adjacent raised units 32 and the fiber yarn width of the second fiber composite layer 22. Through the limitation of this embodiment, it can be ensured that the interval area between any two adjacent raised units 32 is covered by the fiber yarn of the second fiber composite layer 22, that is, to avoid the winding dead angle of the fiber yarn between two adjacent raised units 32, so that the shear force borne by the connecting sleeve body 31 can be basically transmitted to the second fiber composite layer 22, thereby greatly improving the torsional resistance of the connecting sleeve body 31.
[0088] In some embodiments, the number of raised units 32 in a single raised structure group is n 2 , and it satisfies: n 2 =πd 2 / B. Wherein, d 2 is the outer diameter of the connecting sleeve body 31, and B is the preset fiber yarn width of the second fiber composite layer 22.
[0089] In practical applications, for example, the number n of the raised units 32 in a single raised structure group can be set 2 to be 10 to 50, and preferably 36.
[0090] In this embodiment, the number n of the raised units 32 in a single raised structure group is limited by the preset fiber yarn width B of the second fiber composite layer 22 2 , so the interval area between two adjacent raised units 32 in this raised structure group is covered by the fiber yarn of the second fiber composite layer 22, avoiding the winding dead angle of the fiber yarn between two adjacent raised units 32, which is beneficial to improving the torsional resistance of the connecting sleeve body 31.
[0091] In some embodiments, two connecting sleeve bodies 31 may be respectively sleeved on two ends of the inner liner tube 1. At this time, two ends of the second fiber composite layer 22 may be respectively wound around the outer peripheral walls of the two connecting sleeve bodies 31 by hooking around the protruding units 32 on the two connecting sleeve bodies 31. With such an arrangement, the two ends of the second fiber composite layer 22 can respectively pull the two connecting sleeves 3, thereby axially limiting the inner liner tube 1, and effectively preventing the overall peeling of the first fiber composite layer 21 and the inner liner tube 1, resulting in the pull-off failure of the inner liner tube 1.
[0092] In some embodiments, the composite pipeline may further include a third fiber composite layer 23, which is wound around the outer peripheral part of the second fiber composite layer 22, mainly playing the role of fastening and protecting the second fiber composite layer 22. And the fiber winding angle of the second fiber composite layer 22 is not greater than that of the third fiber composite layer 23, that is, the fiber winding angle of the third fiber composite layer 23 is relatively large, which can further enhance the radial load capacity of the composite pipeline.
[0093] Furthermore, the ends of the third fiber composite layer 23 can hook around a plurality of protruding units 32, thereby strengthening the connection stability of the third fiber composite layer 23.
[0094] In some embodiments, the composite pipeline may further include a fourth fiber composite layer 24, which is wound around the outer peripheral part area of the third fiber composite layer 23 corresponding to the connecting sleeve body 31, to play the role of covering, fastening and protecting. And the fiber winding angle of the second fiber composite layer 22 is not greater than that of the fourth fiber composite layer 24, that is, the fiber winding angle of the fourth fiber composite layer 24 is relatively large, which can further enhance the radial load capacity of the composite pipeline.
[0095] In addition, when the thickness of the third fiber composite layer 23 is uneven, since the fourth fiber composite layer 24 is formed by winding processing, the setting of the fourth fiber composite layer 24 will not be difficult, and it will not cause insufficient covering area of the fourth fiber composite layer 24 on the third fiber composite layer 23. In other words, by setting the fourth fiber composite layer 24, not only the composite pipeline is easier to process and manufacture and the protection of the third fiber composite layer 23 can be ensured, but also the production and processing efficiency can be improved.
[0096] In some embodiments, the fourth fiber composite layer 24 can hook around a plurality of protruding units 32, thereby strengthening the connection stability of the fourth fiber composite layer 24.
[0097] In some embodiments, the first fiber composite layer 21, the second fiber composite layer 22, the third fiber composite layer 23, and the fourth fiber composite layer 24 can be continuously and sequentially wound and formed, which can greatly improve the processing efficiency of the fiber composite structure 2 composed of the first fiber composite layer 21, the second fiber composite layer 22, the third fiber composite layer 23, and the fourth fiber composite layer 24.
[0098] In some embodiments, the radial thickness of the first fiber composite layer 21 is not less than 1 mm, preferably 1.5 mm; and / or, the radial thickness of the second fiber composite layer 22 is not less than 3 mm, preferably 3.5 mm; and / or, the radial thickness of the third fiber composite layer 23 is not less than 1 mm, preferably 1.5 mm; and / or, the radial thickness of the fourth fiber composite layer 24 is not less than 3 mm, preferably 4.5 mm.
[0099] In some embodiments, the fiber winding angle of the first fiber composite layer 21 is 45° to 90°, preferably 90°; and / or, the fiber winding angle of the second fiber composite layer 22 is 0° to 45°, preferably 45°; and / or, the fiber winding angle of the third fiber composite layer 23 is 45° to 90°, preferably 90°; and / or, the fiber winding angle of the fourth fiber composite layer 24 is 45° to 90°, preferably 90°.
[0100] In some embodiments, the composite pipeline may further include a wear-resistant sleeve 4, which is axially butted with the inner lining pipe 1. At this time, the connecting sleeve body 31 is sleeved on the end of the inner lining pipe 1 and also sleeved on the wear-resistant sleeve 4, that is, the connecting sleeve body 31 can strengthen the fixation of the inner lining pipe 1 and the wear-resistant sleeve 4. For example, the connecting sleeve body 31 and the wear-resistant sleeve 4 can adopt an interference fit connection method, and the material of the wear-resistant sleeve 4 can be selected from high-chromium cast iron, alloy steel, cemented carbide, etc.
[0101] In addition, the inner lining pipe 1, the connecting sleeve body 31, and the wear-resistant sleeve 4 can all be fixed by gluing. In this way, the entire preparation process of the composite pipeline can be carried out without welding procedures, thereby avoiding the problem of material property degradation caused by welding heat input. And due to the absence of welding procedures, the material selection of the components in the composite pipeline is wider, and they can be freely combined according to the working conditions or technical requirements.
[0102] In some embodiments, the inner lining pipe 1 itself can also be made of wear-resistant materials, such as high manganese steel, chromium cast iron, alloy steel, etc. In addition, parameters such as the thickness and hardness of the inner lining pipe 1 can be determined according to specific designs. Generally, in order to ensure sufficient wear resistance and usage volume, the thickness of the inner lining pipe 1 can be set to not less than 2.5 mm, preferably 3 mm, and the hardness of the inner lining pipe 1 can be set to not less than 60 HRC, preferably 62 HRC.
[0103] In some embodiments, the types of fibers that can be selected for the first fiber composite layer 21, the second fiber composite layer 22, the third fiber composite layer 23, and the fourth fiber composite layer 24 include, but are not limited to, carbon fiber, glass fiber, basalt fiber, aramid fiber, etc., and the matrix resins that can be selected include, but are not limited to, epoxy resin, unsaturated resin, phenolic resin, etc.
[0104] In some embodiments, the material of the connecting sleeve 3 can be selected from steels such as 20 steel and 45 steel, and 45 steel is preferably used.
[0105] In addition, the second exemplary embodiment of the present application also provides a manufacturing method of a composite pipe, which includes:
[0106] Assemble the inner liner pipe 1, the wear-resistant sleeve 4, and the connecting sleeve 3, so that the wear-resistant sleeve 4 is axially butted with the inner liner pipe 1, and the connecting sleeve body 31 of the connecting sleeve 3 is sleeved on the end of the inner liner pipe 1 and also sleeved on the wear-resistant sleeve 4;
[0107] Wind and form the first fiber composite layer 21 on the outer peripheral wall of the inner liner pipe 1;
[0108] Wind and form the second fiber composite layer 22 on the outer peripheral part of the first fiber composite layer 21 and the outer peripheral wall of the connecting sleeve body 31. Among them, the second fiber composite layer 22 hooks around a plurality of protruding units 32 arranged at intervals on the outer peripheral wall of the connecting sleeve body 31, and the fiber winding angle of the second fiber composite layer 22 is not greater than the fiber winding angle of the first fiber composite layer 21;
[0109] Cure all the fiber composite layers in the composite pipe.
[0110] It should be noted that when assembling the inner liner pipe 1, the wear-resistant sleeve 4, and the connecting sleeve 3, the inner liner pipe 1, the wear-resistant sleeve 4, and the connecting sleeve 3 can be fixed on the mandrel by using tooling jigs, and tapered limit tooling can be installed at both ends of the connecting sleeve 3. In this way, it can be ensured that during the winding process of each fiber composite layer, the inner liner pipe 1, the wear-resistant sleeve 4, and the connecting sleeve 3 will not loosen or slide axially. In addition, after curing all the fiber composite layers in the composite pipe, the tapered limit tooling at both ends of the connecting sleeve 3 can be removed first, and then the mandrel can be pulled out to obtain a composite pipe blank, and then the surface of the pipe can be polished to better ensure that the surface quality of the pipe meets the process requirements.
[0111] It should also be noted that after all the fiber composite layers (at least including the first fiber composite layer 21 and the second fiber composite layer 22 in the composite pipe, and may also include the third fiber composite layer 23 and the fourth fiber composite layer 24 in the methods described later) in the composite pipe are wound, curing of all the fiber composite layers can be carried out by methods such as, but not limited to, heating, microwave, and infrared.
[0112] In some embodiments, the manufacturing method of the composite pipeline may further include:
[0113] Winding and molding a third fiber composite layer 23 on the outer peripheral portion of the second fiber composite layer 22. Among them, the end of the third fiber composite layer 23 hooks around a plurality of convex units 32, and the fiber winding angle of the second fiber composite layer 22 is not greater than that of the third fiber composite layer 23.
[0114] In some embodiments, the manufacturing method of the composite pipeline may further include:
[0115] Winding and molding a fourth fiber composite layer 24 on the outer peripheral portion area of the third fiber composite layer 23 corresponding to the connection sleeve body 31. Among them, the fourth fiber composite layer 24 hooks around a plurality of convex units 32, and the fiber winding angle of the second fiber composite layer 22 is not greater than that of the fourth fiber composite layer 24.
[0116] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0117] In the present application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the connection inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0118] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0119] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.
Claims
1. A composite pipeline, characterized in that: include: Liner pipe (1); A wear-resistant sleeve (4) is butted against the inner liner pipe (1) along the axial direction; A connecting sleeve (3), comprising a connecting sleeve body (31) and a plurality of protruding units (32) arranged on the outer peripheral wall of the connecting sleeve body (31) at intervals from each other, wherein the connecting sleeve body (31) is externally mounted on the end of the inner liner pipe (1) and externally mounted on the wear-resistant sleeve (4); A first fiber composite material layer (21) is wound around the outer peripheral wall of the inner liner pipe (1); and The second fiber composite layer (22) is wound around the outer periphery of the first fiber composite layer (21) and is wound around the outer peripheral wall of the connecting sleeve body (31) by hooking around the plurality of protruding units (32), and the fiber winding angle of the second fiber composite layer (22) is not greater than the fiber winding angle of the first fiber composite layer (21).
2. The composite pipe according to claim 1, characterized in that: The radial thickness of the first fiber composite layer (21) is t f1 , and satisfy: Wherein, d1 is the outer diameter of the inner liner (1), [σ] is the preset maximum circumferential stress allowed by the first fiber composite material layer (21), and P C is the preset working internal pressure of the composite pipeline.
3. The composite pipe according to claim 1, characterized in that: The plurality of protrusion units (32) constitute a plurality of protrusion structure groups, and the plurality of protrusion structure groups are arranged in sequence and at intervals along the axial direction of the connecting sleeve body (31); and the plurality of protrusion units (32) in the same protrusion structure group are arranged in sequence and at intervals along the circumferential direction of the connecting sleeve body (31).
4. The composite pipe according to claim 3, characterized in that: The radial thickness of the second fiber composite layer (22) is t f2 , and satisfy: Wherein, d2 is the outer diameter of the connecting sleeve body (31), d3 is the outer diameter of the protrusion unit (32), n1 is the number of the protrusion structure groups in a single connecting sleeve (3), P T is the preset shear strength of a single protrusion unit (32), η is the preset loss factor, B is the preset fiber yarn width of the second fiber composite layer (22), P L is the preset tensile strength of the fiber yarn of the second fiber composite layer (22), and α is the preset fiber winding angle of the second fiber composite layer (22).
5. The composite pipe according to claim 3, characterized in that: The number of the protruding structure groups in a single connecting sleeve (3) is n1, and satisfies: Wherein, d1 is the outer diameter of the inner liner pipe (1), d2 is the outer diameter of the connecting sleeve body (31), d3 is the outer diameter of the protruding unit (32), and P C is the preset working internal pressure of the composite pipeline, P T is the preset shear strength of a single protrusion unit (32), P J is the interface shear strength between the fiber yarn of the second fiber composite layer (22) and the connecting sleeve body (31), B is the preset fiber yarn width of the second fiber composite layer (22), and α is the preset fiber winding angle of the second fiber composite layer (22).
6. The composite pipe according to claim 3, characterized in that: The number of the protrusion units (32) in a single protrusion structure group is n2, and satisfies: n2=πd2 / B; Wherein, d2 is the outer diameter of the connecting sleeve body (31), and B is the preset fiber yarn width of the second fiber composite layer (22).
7. The composite pipe according to claim 1, characterized in that: The composite pipe further comprises a third fiber composite layer (23), wherein the third fiber composite layer (23) is wound around the outer periphery of the second fiber composite layer (22), an end portion of the third fiber composite layer (23) is hooked around a plurality of the protruding units (32), and a fiber winding angle of the second fiber composite layer (22) is not greater than a fiber winding angle of the third fiber composite layer (23).
8. The composite pipe according to claim 7, characterized in that: The composite pipe further comprises a fourth fiber composite layer (24), the fourth fiber composite layer (24) being wound around the outer peripheral region of the third fiber composite layer (23) located at the connecting sleeve body (31), the fourth fiber composite layer (24) being hooked around a plurality of the protruding units (32), and the fiber winding angle of the second fiber composite layer (22) being no greater than the fiber winding angle of the fourth fiber composite layer (24).
9. The composite pipe according to claim 8, characterized in that: The first fiber composite layer (21), the second fiber composite layer (22), the third fiber composite layer (23) and the fourth fiber composite layer (24) are continuously and sequentially wound into shape.
10. The composite pipe according to claim 1, characterized in that: The two ends of the inner lining tube (1) are respectively sleeved with the two connecting sleeve bodies (31), and the two ends of the second fiber composite layer (22) are respectively wrapped around the outer peripheral walls of the two connecting sleeve bodies (31) by respectively hooking around the protruding units (32) on the two connecting sleeve bodies (31).
11. A method for manufacturing a composite pipe, characterized in that: include: Assembling the inner liner pipe (1), the wear-resistant sleeve (4) and the connecting sleeve (3), so that the wear-resistant sleeve (4) and the inner liner pipe (1) are butted together along the axial direction, and the connecting sleeve body (31) of the connecting sleeve (3) is externally mounted on the end of the inner liner pipe (1) and externally mounted on the wear-resistant sleeve (4); A first fiber composite material layer (21) is formed by winding on the outer peripheral wall of the inner liner tube (1); A second fiber composite layer (22) is formed by winding the outer peripheral portion of the first fiber composite layer (21) and the outer peripheral wall of the connecting sleeve body (31), wherein the second fiber composite layer (22) is hooked around a plurality of protrusion units (32) arranged at intervals on the outer peripheral wall of the connecting sleeve body (31), and a fiber winding angle of the second fiber composite layer (22) is not greater than a fiber winding angle of the first fiber composite layer (21); All fiber composite material layers in the composite pipe are cured.
12. The method for manufacturing a composite pipe according to claim 11, characterized in that: The manufacturing method further comprises: A third fiber composite layer (23) is formed by winding on the outer periphery of the second fiber composite layer (22), wherein an end of the third fiber composite layer (23) is hooked around a plurality of the protruding units (32), and a fiber winding angle of the second fiber composite layer (22) is not greater than a fiber winding angle of the third fiber composite layer (23).
13. The method for manufacturing a composite pipe according to claim 12, characterized in that: The manufacturing method further comprises: A fourth fiber composite layer (24) is formed by winding the third fiber composite layer (23) on an outer peripheral area of the connecting sleeve body (31), wherein the fourth fiber composite layer (24) is hooked around a plurality of the protruding units (32), and a fiber winding angle of the second fiber composite layer (22) is not greater than a fiber winding angle of the fourth fiber composite layer (24).