Prestressed carbon fiber plate wound composite steel cylinder concrete pipe
By employing a carbon fiber plate winding composite structure and fiber optic sensing monitoring in prestressed steel cylinder concrete pipes, the problem of easy pipe bursting in corrosive environments has been solved, achieving a pipe design with higher durability and impermeability.
Patent Information
- Application Number
- CN202423308259.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing prestressed concrete cylinder pipes (PCCP) are prone to micro-cracks and pipe bursts in corrosive environments, and broken wires are difficult to detect. Existing repair measures are insufficient to fundamentally solve the problem of steel cylinder damage.
The composite steel cylinder concrete pipe structure, which is made of carbon fiber plate winding, includes inner and outer steel pipes, concrete layers and carbon fiber plates. Combined with stud modules and fiber optic sensors, it forms a double steel pipe sandwich structure, which enhances corrosion resistance and impermeability, and monitors the health status of the pipeline through fiber optic sensors.
It improves the durability and impermeability of pipelines, reduces weight, facilitates transportation and installation, and enables real-time monitoring of pipeline status, avoiding the risks of corrosion, breakage and pipe burst.
Smart Images
Figure CN223549986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline technology, and in particular to a prestressed carbon fiber plate wound composite steel cylinder concrete pipe. Background Technology
[0002] Prestressed concrete cylinder pipes (PCCPs) demonstrate significant economic advantages in large-diameter, medium-to-high pressure water supply and drainage projects due to their unique prestressed structural design. However, PCCPs also have some inherent drawbacks. In particular, the lack of prestress in their mortar protective layer makes the pipes prone to micro-cracks during operation. In corrosive environments, the penetration of corrosive ions can cause the steel wires to break, further leading to pipe bursts, thus affecting pipeline operation and resulting in substantial losses.
[0003] Current research on the problem of pipe bursting caused by steel wire damage during the service of PCCP mainly focuses on wire breakage monitoring, PCCP repair, and reinforcement. These methods are passive measures and are difficult to fundamentally solve the problem of steel cylinder damage. Utility Model Content
[0004] The purpose of this invention is to provide a prestressed carbon fiber plate wound composite steel cylinder concrete pipe. This addresses the technical problems of existing PCCP pipes, such as high internal pressure leading to easy rupture and bursting, and difficulty in monitoring broken wires.
[0005] A prestressed carbon fiber plate wound composite steel cylinder concrete pipe includes a steel cylinder concrete pipe, wherein a carbon fiber plate is spirally wound on the outer wall of the steel cylinder concrete pipe.
[0006] The steel cylinder concrete pipe includes an inner steel pipe and an outer steel pipe coaxially sleeved together, with a concrete layer filling the space between the inner and outer steel pipes.
[0007] Optionally, the outer wall of the carbon fiber plate is filled with a protective layer.
[0008] Optionally, the outer wall of the carbon fiber plate is wrapped with glass fiber cloth, and the outer wall of the glass fiber cloth is filled with a protective layer.
[0009] Optionally, a number of stud modules are provided at intervals along the axial direction on both the outer wall of the inner steel pipe and the inner wall of the outer steel pipe.
[0010] The stud module includes a plurality of studs arranged in a circular array along the axis of the inner or outer steel pipe. The studs on the outer wall of the inner steel pipe and the studs on the inner wall of the outer steel pipe are offset in the axial direction, and all of the studs are located within the concrete layer.
[0011] Optionally, a number of corrugated steel rings are provided at intervals along the axial direction on both the outer wall of the inner steel pipe and the inner wall of the outer steel pipe.
[0012] The corrugated steel rings on the outer wall of the inner steel pipe and the corrugated steel rings on the inner wall of the outer steel pipe are offset in the axial direction, and all of the corrugated steel rings are located within the concrete layer.
[0013] Optionally, the concrete layer may also contain a number of longitudinal reinforcement bars;
[0014] The axis of the longitudinal rib is parallel to the axis of the inner steel pipe, and a plurality of the longitudinal ribs are arranged in a circular array along the axis of the inner steel pipe.
[0015] Optionally, the carbon fiber plate is sparsely wound into a steel cylinder concrete pipe, or is tightly wound into a steel cylinder concrete pipe, or is tightly wound into a steel cylinder concrete pipe, or is a plate-type composite wound steel cylinder concrete pipe.
[0016] The single-layer sparse winding refers to the gapped winding of the carbon fiber plate, while the single-layer tight winding and multi-layer tight winding refer to the gapless winding of the carbon fiber plate. The plate-type stacking refers to the partial overlap between carbon fiber plates.
[0017] Optionally, both ends of the steel cylinder concrete pipe are provided with connecting flanges, and the connecting flanges are provided with a plurality of bolt holes arranged in a circular array along their axis.
[0018] Optionally, the two ends of the steel cylinder concrete pipe are respectively provided with a male connector and a female connector;
[0019] The outer wall of the male connector is fitted with an annular sealing ring. When connecting pipes, the male connector of one pipe is inserted into the female connector of another pipe.
[0020] Optionally, an optical fiber sensor is embedded in the carbon fiber plate.
[0021] Due to the adoption of the above technical solution, this utility model has the following advantages:
[0022] 1. Compared to prestressed steel wire, carbon fiber plates have higher strength and corrosion resistance. Even when exposed to corrosive environments for extended periods, there is no need to worry about corrosion and breakage. Therefore, composite concrete cylinder pipes produced using prestressed carbon fiber plates have better durability and a longer service life. This avoids the risk of pipe bursting caused by corrosion and breakage of prestressed steel wires, as is common in prestressed concrete cylinder pipes (PCCP).
[0023] 2. This application uses a double-layer steel pipe with an inner steel pipe and an outer steel pipe, which has better anti-seepage ability than a single steel pipe. Especially under high working pressure, the inner and outer steel pipes have double the anti-seepage ability.
[0024] 3. This application uses an inner steel pipe with studs, an outer steel pipe and the concrete between them to form a double steel pipe sandwich concrete cylinder. The studs are wrapped in concrete, which allows the inner and outer steel pipes to be tightly bonded to the concrete. In addition, the prestressed carbon fiber plate is wrapped around the outside. This composite structure forms a better arch structure with better resistance to external pressure. It can adapt to deeper burial depths of buried pipelines and adapt to more complex geological conditions.
[0025] 4. This application uses an inner steel pipe with studs, an outer steel pipe and the concrete between them to form a double steel pipe sandwich concrete cylinder. Unlike traditional prestressed concrete cylinder pipe (PCCP), it does not require a relatively thick concrete layer. This can significantly reduce the thickness of the concrete, which helps to greatly reduce the weight of the pipeline and facilitates transportation, installation and other operations.
[0026] 5. This application uses fiber optic sensors embedded in carbon fiber plates to monitor parameters such as pipeline pressure, carbon fiber plate stress, and pipeline leakage, which is beneficial for pipeline health monitoring.
[0027] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0028] The accompanying drawings of this utility model are described below.
[0029] Figure 1 This is a schematic diagram of the pipe structure in Embodiment 1 of this utility model.
[0030] Figure 2 This is a schematic diagram of the pipe structure in Embodiment 2 of this utility model.
[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the pipe in Embodiment 1 of this utility model.
[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the pipe in Embodiment 2 of this utility model.
[0033] Figure 5 This is a schematic diagram of the structure of the pipe connection assembly of this utility model, which is a bolted connection assembly.
[0034] Figure 6 This is a schematic diagram of the structure of the pipe connection assembly of this utility model, which is a socket-type connection assembly.
[0035] In the diagram: 1-Steel cylinder concrete pipe; 101-Inner steel pipe; 102-Outer steel pipe; 103-Concrete layer; 104-Stud; 105-Wave steel reinforcement ring; 106-Longitudinal reinforcement; 2-Carbon fiber plate; 3-Protective layer; 4-Connecting flange; 401-Bolt hole; 51-Male connector; 52-Female connector. Detailed Implementation
[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0037] Example 1:
[0038] like Figure 1 and Figure 3 The present invention relates to a prestressed carbon fiber plate wound composite steel cylinder concrete pipe, comprising a steel cylinder concrete pipe 1, wherein a carbon fiber plate 2 is spirally wound on the outer wall of the steel cylinder concrete pipe 1.
[0039] The steel cylinder concrete pipe 1 includes an inner steel pipe 101 and an outer steel pipe 102 coaxially sleeved together, with a concrete layer 103 filling the space between the inner steel pipe 101 and the outer steel pipe 102.
[0040] like Figure 1 and Figure 3 As shown, several stud modules are provided at intervals along the axial direction on the outer wall of the inner steel pipe 101 and the inner wall of the outer steel pipe 102.
[0041] The stud module includes a plurality of studs 104 arranged in a ring array along the axis of the inner steel pipe 101 or the outer steel pipe 102. The studs 104 on the outer wall of the inner steel pipe 101 and the studs 104 on the inner wall of the outer steel pipe 102 are offset in the axial direction. All of the studs 104 are located within the concrete layer 103.
[0042] As one embodiment of this application, the outer wall of the carbon fiber plate 2 is wrapped with glass fiber cloth, and the outer wall of the glass fiber cloth is filled with a protective layer 3.
[0043] In this embodiment, during the production of the steel cylinder concrete pipe 1, several studs 104 are first welded sequentially to the outer wall of the inner steel pipe 101 and the inner wall of the outer steel pipe 102. Then, the inner steel pipe 101 and the outer steel pipe 102 are coaxially arranged for the pouring of the concrete layer 103.
[0044] In this embodiment, the carbon fiber plate 2 is made by pultrusion process. During production, optical fiber sensors are pre-embedded between the carbon fiber filaments. The optical fiber sensors can monitor data such as pipe cracks, leaks, vibration, pressure, and temperature in real time.
[0045] In this embodiment, carbon fiber plates 2 are spirally wound around the outer wall of the steel cylinder concrete pipe 1 at a winding angle greater than 85° and less than 90°. The spiral winding method can be any one of single-layer sparse winding, single-layer tight winding, multi-layer tight winding, and plate-type overlapping winding. Specifically: single-layer sparse winding is a single-layer winding with a winding gap between the sidewalls of the spiral carbon fiber plates 2; single-layer tight winding is a single-layer winding without a winding gap between the sidewalls of the spiral carbon fiber plates 2; multi-layer tight winding is a multi-layer winding without a winding gap between the sidewalls of the spiral carbon fiber plates 2. In multi-layer winding, the spiral winding starts from the beginning end and ends, then repeats from the end end back to the beginning end, until the predetermined number of winding layers is reached. Plate-type overlapping winding involves partial overlap between adjacent spirally wound carbon fiber plates 2, with an overlap width between 2-3 mm. Setting the overlap width improves the overall sealing of the pipe and enhances the mechanical properties of the carbon fiber layers, solving the technical problem of weak compressive strength at the joints of adjacent carbon fiber plates 2 or carbon fiber filaments during tight winding, leading to easy breakage.
[0046] In this embodiment, the protective layer 3 is a filled ordinary foam partition, which effectively prevents the carbon fiber layer from being damaged by collision during handling or installation, thus affecting its mechanical properties.
[0047] like Figure 5 and 6 As shown, both ends of the steel cylinder concrete pipe 1 are also provided with connecting components for connecting adjacent pipes. The connecting components are socket-type connecting components or bolt-type connecting components.
[0048] As an embodiment of the present utility model, the socket-type connection assembly includes a male connector 51 and a female connector 52 respectively disposed at both ends of the steel cylinder concrete pipe 1;
[0049] The outer wall of the male connector 51 is fitted with an annular sealing ring. When connecting pipes, the male connector 51 of one pipe is inserted into the female connector 52 of another pipe.
[0050] In this embodiment, both ends of the outer steel pipe 102 are provided with transition connecting sections for installing the male connector 51 and the female connector 52. The male connector 51 and the female connector 52 can be fixedly connected to the outer steel pipe 102 by welding.
[0051] As another embodiment of this utility model, the bolted connection assembly includes connecting flanges 4 disposed at both ends of the steel cylinder concrete pipe 1. Several bolt holes 401 are arranged in a circular array along the axis of the connecting flanges 4. When connecting pipes, the connecting flanges 4 of adjacent pipes are connected by bolts.
[0052] In this embodiment, the connecting flange 4 is welded to the outer steel pipe 102.
[0053] Example 2:
[0054] like Figure 2 and Figure 4 The prestressed carbon fiber plate wound composite steel cylinder concrete pipe shown includes a steel cylinder concrete pipe 1, on which a carbon fiber plate 2 is spirally wound on the outer wall, and a protective layer 3 is filled on the outer wall of the carbon fiber plate 2.
[0055] The steel cylinder concrete pipe 1 includes an inner steel pipe 101 and an outer steel pipe 102 coaxially sleeved together, with a concrete layer 103 filling the space between the inner steel pipe 101 and the outer steel pipe 102.
[0056] like Figure 2 and Figure 4 As shown, a plurality of corrugated steel rings 105 are provided at intervals along the axial direction on the outer wall of the inner steel pipe 101 and the inner wall of the outer steel pipe 102.
[0057] The corrugated steel bar rings 105 on the outer wall of the inner steel pipe 101 and the corrugated steel bar rings 105 on the inner wall of the outer steel pipe 102 are offset in the axial direction, and all of the corrugated steel bar rings 105 are located within the concrete layer 103.
[0058] like Figure 2 and Figure 4 As shown, a number of longitudinal reinforcement bars 106 are also provided in the concrete layer 103;
[0059] The axis of the longitudinal rib 106 is parallel to the axis of the inner steel pipe 101, and a plurality of the longitudinal ribs 106 are arranged in a circular array along the axis of the inner steel pipe 101.
[0060] In this embodiment, during the production of the steel cylinder concrete pipe 1, the corrugated steel bar ring 105 is first welded to the outer wall of the inner steel pipe 101 and the inner wall of the outer steel pipe 102, and the longitudinal reinforcement 106 is inserted between the corrugated protrusions of the corrugated steel bar ring 105, and then the concrete layer 103 is poured.
[0061] In this embodiment, the carbon fiber plate 2 is made by pultrusion process. During production, optical fiber sensors are pre-embedded between the carbon fiber filaments. The optical fiber sensors can monitor data such as pipe cracks, leaks, vibration, pressure, and temperature in real time.
[0062] In this embodiment, carbon fiber plates 2 are spirally wound around the outer wall of the steel cylinder concrete pipe 1 at a winding angle greater than 85° and less than 90°. The spiral winding method can be any one of single-layer sparse winding, single-layer tight winding, multi-layer tight winding, and plate-type overlapping winding. Specifically: single-layer sparse winding is a single-layer winding with a winding gap between the sidewalls of the spiral carbon fiber plates 2; single-layer tight winding is a single-layer winding without a winding gap between the sidewalls of the spiral carbon fiber plates 2; multi-layer tight winding is a multi-layer winding without a winding gap between the sidewalls of the spiral carbon fiber plates 2. In multi-layer winding, the spiral winding starts from the beginning end and ends, then repeats from the end end back to the beginning end, until the predetermined number of winding layers is reached. Plate-type overlapping winding involves partial overlap between adjacent spirally wound carbon fiber plates 2, with an overlap width between 2-3 mm. Setting the overlap width improves the overall sealing of the pipe and enhances the mechanical properties of the carbon fiber layers, solving the technical problem of weak compressive strength at the joints of adjacent carbon fiber plates 2 or carbon fiber filaments during tight winding, leading to easy breakage.
[0063] In this embodiment, the protective layer 3 is a filled ordinary foam partition, which effectively prevents the carbon fiber layer from being damaged by collision during handling or installation, thus affecting its mechanical properties.
[0064] like Figure 5 and Figure 6 As shown, both ends of the steel cylinder concrete pipe 1 are also provided with connecting components for connecting adjacent pipes. The connecting components are socket-type connecting components or bolt-type connecting components.
[0065] As an embodiment of the present utility model, the socket-type connection assembly includes a male connector 51 and a female connector 52 respectively disposed at both ends of the steel cylinder concrete pipe 1;
[0066] The outer wall of the male connector 52 is fitted with an annular sealing ring. When connecting pipes, the male connector 51 of one pipe is inserted into the female connector 52 of another pipe.
[0067] In this embodiment, both ends of the outer steel pipe 102 are provided with transition connection sections for installing the male connector 51 and the female connector 52. The male connector 51 and the female connector 52 can be fixedly connected to the outer steel pipe 102 by welding.
[0068] As another embodiment of this utility model, the bolted connection assembly includes connecting flanges 4 disposed at both ends of the steel cylinder concrete pipe 1. Several bolt holes 401 are arranged in a circular array along the axis of the connecting flanges 4. When connecting pipes, the connecting flanges 4 of adjacent pipes are connected by bolts.
[0069] In this embodiment, the connecting flange 4 is welded to the outer steel pipe 102.
[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.
Claims
1. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe, characterized in that, It includes a steel cylinder concrete pipe (1), on the outer wall of which a carbon fiber plate (2) is spirally wound; The steel cylinder concrete pipe (1) includes an inner steel pipe (101) and an outer steel pipe (102) coaxially sleeved together, and a concrete layer (103) is filled between the inner steel pipe (101) and the outer steel pipe (102).
2. The prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, characterized in that, The outer wall of the carbon fiber plate (2) is filled with a protective layer (3).
3. The prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, characterized in that, The outer wall of the carbon fiber plate (2) is wrapped with glass fiber cloth, and the outer wall of the glass fiber cloth is filled with a protective layer (3).
4. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, 2, or 3, characterized in that, Several stud modules are provided at intervals along the axial direction on the outer wall of the inner steel pipe (101) and the inner wall of the outer steel pipe (102). The stud module includes a plurality of studs (104) arranged in a circular array along the axis of the inner steel pipe (101), and all of the studs (104) are located within the concrete layer (103).
5. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, 2, or 3, characterized in that, Several corrugated steel rings (105) are provided at intervals along the axial direction on the outer wall of the inner steel pipe (101) and the inner wall of the outer steel pipe (102); The corrugated steel rings (105) on the outer wall of the inner steel pipe (101) and the corrugated steel rings (105) on the inner wall of the outer steel pipe (102) are staggered in the axial direction, and several of the corrugated steel rings (105) are located in the concrete layer (103).
6. The prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 5, characterized in that, The concrete layer (103) is also provided with a number of longitudinal reinforcement bars (106); The axis of the longitudinal rib (106) is parallel to the axis of the inner steel pipe (101), and a plurality of the longitudinal ribs (106) are arranged in a circular array along the axis of the inner steel pipe (101).
7. The prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, characterized in that, The carbon fiber plate (2) is a single-layer sparsely wound steel cylinder concrete pipe (1), or a single-layer tightly wound steel cylinder concrete pipe (1), or a multi-layer tightly wound steel cylinder concrete pipe (1), or a plate-type stacked wound steel cylinder concrete pipe (1). The single-layer sparse winding refers to the gapped winding of the carbon fiber plate (2), the single-layer tight winding and the multi-layer tight winding refer to the gapless winding of the carbon fiber plate (2), and the plate-type stacking refers to the partial overlap between the carbon fiber plates (2).
8. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 2 or 3, characterized in that, Both ends of the steel cylinder concrete pipe (1) are provided with connecting flanges (4), and a number of bolt holes (401) are arranged in a ring array along its axis on the connecting flanges (4).
9. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 2 or 3, characterized in that, The steel cylinder concrete pipe (1) is provided with a male connector (51) and a female connector (52) at both ends; The outer wall of the male connector (51) is fitted with an annular sealing ring. When connecting pipes, the male connector (51) of one pipe is inserted into the female connector (52) of another pipe.
10. A prestressed carbon fiber plate wound composite steel cylinder concrete pipe according to claim 1, characterized in that, The carbon fiber plate (2) is embedded with an optical fiber sensor.