CN219062687U - Large-caliber PCCP (prestressed concrete cylinder pipe) without external mold - Google Patents
Large-caliber PCCP (prestressed concrete cylinder pipe) without external mold Download PDFInfo
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- CN219062687U CN219062687U CN202223560167.2U CN202223560167U CN219062687U CN 219062687 U CN219062687 U CN 219062687U CN 202223560167 U CN202223560167 U CN 202223560167U CN 219062687 U CN219062687 U CN 219062687U
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Abstract
The application relates to a prestressed steel cylinder concrete pipe, in particular to a large-caliber PCCP pipe without an outer die; the concrete comprises a concrete layer, a steel cylinder, a prestressed steel wire and a composite protective layer; the inner ring of the steel cylinder is provided with a concrete layer, and two ends of the concrete layer are respectively connected to the bell and spigot ends of the steel cylinder; the outer wall of the steel cylinder is wound with a prestressed steel wire, and the outer side of the steel cylinder is provided with a composite protective layer which covers the prestressed steel wire. By implementing the technical scheme, the concrete layer is poured on the inner side of the steel cylinder, the external concrete is removed, the steel cylinder is used as an outer mold, the outer mold is not required to be manufactured, the pipe with different wall thickness requirements can be rapidly adapted, and the external protection performance is improved through the design of the external composite protection layer, so that the anti-corrosion protection performance of the external wall concrete is replaced.
Description
Technical Field
The application relates to a prestressed steel cylinder concrete pipe, in particular to a large-caliber PCCP pipe without an outer die.
Background
The prestressed concrete cylinder pipe (Prestressed concrete cylinder pipe, PCCP for short) is a new pipeline material introduced and developed from abroad in the last century in China, which is a water pipe made by winding circumferential prestressed steel wires on a high-strength concrete pipe core with a steel cylinder and spraying a dense cement mortar protection layer on the steel wire.
The composite pipe with high strength, high impermeability and high sealing performance is produced with thin steel plate, medium steel plate, deformed steel, high strength pre-stressed steel wire, high strength concrete, high strength mortar, rubber sealing ring and other material.
At present, the structure adopted by the prestressed steel cylinder concrete pipe above the caliber DN1400 is of a buried type, namely a concrete layer, a steel lining cylinder layer, a concrete layer, a steel wire layer, a mortar protection layer and an anti-corrosion layer (according to requirements). The concrete layer is poured by a mould, the wall thickness of the concrete layer is different according to different embedded depth thicknesses and working pressure grades, and the mould also needs to be replaced, so that some problems are brought to actual production. As soon as a few specifications are added, a new wall thickness mold is added, and a certain waste is caused to the mold. Secondly, in order to not increase too many moulds, the concrete wall thickness cannot be the optimized wall thickness to adapt to the mould requirement, and the cost is wasted; thirdly, when the new specification of a new project is met, when the original die cannot be used, the new die needs to be processed, the production period of the die is longer, so that market opportunities are lost, and market competition efficiency is reduced.
Disclosure of Invention
The object of the present application is to propose a large diameter PCCP tube without the need for an external mold that eliminates the above drawbacks.
The application is realized in such a way that: a large-caliber PCCP pipe without an outer mold comprises a concrete layer, a steel cylinder, a prestressed steel wire and a composite protective layer; the inner ring of the steel cylinder is provided with a concrete layer, and two ends of the concrete layer are respectively connected to the bell and spigot ends of the steel cylinder; the outer wall of the steel cylinder is wound with a prestressed steel wire, and the outer side of the steel cylinder is provided with a composite protective layer which covers the prestressed steel wire.
Further, the composite protective layer sequentially comprises an inner mortar protective layer, a high-permeability epoxy anticorrosive layer, an outer mortar protective layer, a polyurea waterproof anticorrosive layer and an outer high-performance mortar protective layer from inside to outside; the inner mortar protective layer is coated on the prestressed steel wire.
Further, the outer diameter of the steel cylinder is not smaller than 1400mm.
By implementing the technical scheme, the concrete layer is poured on the inner side of the steel cylinder, the external concrete is removed, the steel cylinder is used as an outer mold, the outer mold is not required to be manufactured, the pipe with different wall thickness requirements can be rapidly adapted, and the external protection performance is improved through the design of the external composite protection layer, so that the anti-corrosion protection performance of the external wall concrete is replaced.
Drawings
The specific structure of the present application is given by the following figures and examples:
fig. 1 is a schematic structural view of embodiment 1 of the present application.
Legend: 1. the concrete layer, the steel cylinder, the prestressed steel wire layer, the inner mortar protection layer, the high-permeability epoxy anti-corrosion layer, the outer mortar protection layer, the polyurea waterproof anti-corrosion layer and the outer high-performance mortar protection layer are respectively arranged on the concrete layer, the steel cylinder, the prestressed steel wire layer, the inner mortar protection layer, the high-permeability epoxy anti-corrosion layer, the outer mortar protection layer, the polyurea waterproof anti-corrosion layer and the outer high-performance mortar protection layer.
Detailed Description
The present application is not limited by the following examples, and specific embodiments may be determined according to technical solutions and practical situations of the present application.
In the embodiment, as shown in fig. 1, a large-caliber PCCP pipe without an external mold comprises a concrete layer 1, a steel cylinder 2, a prestressed steel wire and a composite protective layer; the inner ring of the steel cylinder 2 is provided with a concrete layer 1, and two ends of the concrete layer 1 are respectively connected to the bell and spigot ends and the socket ends of the steel cylinder 2; the outer wall of the steel cylinder 2 is wound with a prestressed steel wire, and the outer side of the steel cylinder 2 is provided with a composite protective layer which covers the prestressed steel wire.
The application makes the time: the steel cylinder 2 is used as an outer die, and an inner die, a bottom die and a top die are assembled; pouring high-performance concrete, curing for 12 hours, and removing the die to achieve the winding strength; winding a prestressed steel wire outside the steel cylinder 2 to form a prestressed steel wire layer 3; an inner mortar protection layer 4 sprayed outside the prestressed wire; spraying high-permeability epoxy anticorrosive paint on the inner mortar protective layer 4, wherein the penetration thickness is 5mm, so as to form a high-permeability epoxy anticorrosive layer 5; spraying an outer mortar protection layer 6 with the thickness matched with the diameter of the prestressed steel wire outside the high-permeability epoxy anti-corrosion layer 5; spraying a high-quality ductile polyurea waterproof anticorrosive layer 7 outside the outer mortar protective layer 6; and the outer high-performance mortar protective layer 8 is used for cracking prevention protection.
And spraying a high-performance mortar protection layer outside the polyurea waterproof anticorrosive layer 7 for protecting the waterproof anticorrosive layer from being forcibly damaged by physical external force.
According to the method, the steel cylinder 2 is used for replacing an outer die for the pipe above DN1400, different wall thickness requirements can be met, the time for manufacturing a new die is shortened, high-performance concrete is used for replacing common concrete for forming, wire winding can be achieved through demolding, reinforcement optimization is carried out on a mortar layer outside a wire winding layer, multilayer waterproof protection is adopted, and corrosion protection on the steel wire and the steel cylinder 2 is further enhanced.
The method reduces the number of the dies used, meets the requirements of optimizing cost for various wall thicknesses, meets the market demands of products with different specifications, eliminates the waiting time of die production, can improve the winding efficiency, enhances the anti-corrosion and protection effects, ensures the service life of the pipe, and is simple in process operation, and a safe and reliable innovation in the manufacturing process of the prestressed steel cylinder 2 concrete pipe.
As shown in fig. 1, the composite protective layer sequentially comprises an inner mortar protective layer 4, a high-permeability epoxy anticorrosive layer 5, an outer mortar protective layer 6, a polyurea waterproof anticorrosive layer 7 and an outer high-performance mortar protective layer 8 from inside to outside; the inner mortar protection layer 4 is coated on the prestressed steel wire.
And adopting multi-layer and multi-dimensional composite protection for the outer wall mortar protection layer to replace the single protection in the past.
In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used merely to indicate relative positional relationships between the relevant portions, and do not limit the absolute positions of the relevant portions.
The technical characteristics form the optimal embodiment of the application, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the needs of different situations.
Claims (3)
1. A need not external mold's heavy-calibre PCCP pipe, its characterized in that: comprises a concrete layer, a steel cylinder, a prestressed steel wire and a composite protective layer; the inner ring of the steel cylinder is provided with a concrete layer, and two ends of the concrete layer are respectively connected to the bell and spigot ends of the steel cylinder; the outer wall of the steel cylinder is wound with a prestressed steel wire, and the outer side of the steel cylinder is provided with a composite protective layer which covers the prestressed steel wire.
2. A large diameter PCCP tube requiring no external mold as defined in claim 1, wherein: the composite protective layer sequentially comprises an inner mortar protective layer, a high-permeability epoxy anticorrosive layer, an outer mortar protective layer, a polyurea waterproof anticorrosive layer and an outer high-performance mortar protective layer from inside to outside; the inner mortar protective layer is coated on the prestressed steel wire.
3. A large caliber PCCP pipe without an external mold according to claim 1 or 2, wherein: the outer diameter of the steel cylinder is not less than 1400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223560167.2U CN219062687U (en) | 2022-12-30 | 2022-12-30 | Large-caliber PCCP (prestressed concrete cylinder pipe) without external mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223560167.2U CN219062687U (en) | 2022-12-30 | 2022-12-30 | Large-caliber PCCP (prestressed concrete cylinder pipe) without external mold |
Publications (1)
| Publication Number | Publication Date |
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| CN219062687U true CN219062687U (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223560167.2U Active CN219062687U (en) | 2022-12-30 | 2022-12-30 | Large-caliber PCCP (prestressed concrete cylinder pipe) without external mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219062687U (en) |
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2022
- 2022-12-30 CN CN202223560167.2U patent/CN219062687U/en active Active
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