CN217977802U - Prestressed steel cylinder concrete pipe - Google Patents
Prestressed steel cylinder concrete pipe Download PDFInfo
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- CN217977802U CN217977802U CN202122399182.2U CN202122399182U CN217977802U CN 217977802 U CN217977802 U CN 217977802U CN 202122399182 U CN202122399182 U CN 202122399182U CN 217977802 U CN217977802 U CN 217977802U
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Abstract
The utility model relates to a prestressing force steel cylinder concrete pipe, include: the tube core axially extends along the front-back direction, and is provided with a steel cylinder extending along the front-back direction; the prestressed steel wire layer is formed by correspondingly winding prestressed steel wires outside the pipe core along the annular direction of the pipe core; the outer protective layer covers the outer side of the prestressed steel wire and is used for protecting the prestressed steel wire; and the outer peripheral surface of the steel cylinder is provided with an anti-corrosion layer for preventing the outer surface of the steel cylinder from being corroded. The utility model provides an among the prestressed steel cylinder concrete pipe, set up the anticorrosion layer on the outer peripheral face of steel cylinder, can prevent effectively that the corrosive medium of external environment from corroding steel cylinder surface, reduce the probability that local corrosion appears in steel cylinder surface, extension steel cylinder concrete life.
Description
Technical Field
The utility model relates to a prestressing force steel cylinder concrete pipe.
Background
Prestressed Concrete Cylinder Pipe (PCCP) is short for PCCP, and is a Pipe made by winding circumferential Prestressed steel wires on the outer side of a Concrete Pipe core with a steel Cylinder and manufacturing a cement mortar protective layer. Referring to GB/T19685-2017, the steel cylinder can be divided into two types according to the position of the steel cylinder in the tube core: a lining type prestressed steel cylinder concrete pipe (PCCPL) and an embedded type prestressed steel cylinder concrete pipe (PCCPE).
As is well known, the anticorrosion treatment of metal materials in a structure is an effective method for prolonging the service life of the structure, and is also the same for a prestressed steel cylinder concrete pipe, if the prestressed steel cylinder concrete pipe is applied to a strong corrosion environment, such as strong corrosivity of soil, seawater transportation and the like, aggressive media in the soil environment of the outer wall of the prestressed steel cylinder concrete pipe and in water media in the pipe invade a mortar protective layer and a concrete layer in the prestressed steel cylinder concrete pipe and reach the surfaces of a steel wire and a steel cylinder, electrochemical corrosion of the steel wire and the steel cylinder can occur, further the corrosion failure of the steel wire and the steel cylinder can be caused, further, a pipe explosion phenomenon can occur, and hidden danger is caused for the safe operation of a pipeline system. Therefore, protection of the metal material in the prestressed concrete cylinder pipe structure is particularly important.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a better prestressing force steel cylinder concrete pipe of steel cylinder anticorrosive protection performance.
In order to achieve the above object, the utility model provides a prestressed steel cylinder concrete pipe's technical scheme is: a prestressed concrete cylinder pipe comprises a pipe core axially extending along the front-back direction, wherein the pipe core is provided with a steel cylinder extending along the front-back direction; the prestressed concrete cylinder pipe also comprises a prestressed steel wire layer formed by correspondingly winding prestressed steel wires outside the pipe core along the annular direction of the pipe core, and an outer protective layer for protecting the prestressed steel wires covers the outer sides of the prestressed steel wires; and the outer peripheral surface of the steel cylinder is provided with an anti-corrosion layer for preventing the outer surface of the steel cylinder from being corroded.
The beneficial effects are that: the utility model provides an among the prestressed steel cylinder concrete pipe, set up anti-corrosion coating on the outer peripheral face of steel cylinder, can prevent effectively that the corrosive medium of external environment from corroding the steel cylinder surface, reduce the probability of local corrosion appears in the steel cylinder surface, extension steel cylinder concrete life.
As a further improvement, in the both ends of steel cylinder on the front and back direction, one end coaxial welding is connected with the bellmouth steel ring, and one end coaxial welding is connected with socket steel ring in addition, the bellmouth steel ring has the bellmouth working face, sets up inboard anticorrosive coating on the bellmouth working face, the socket steel ring has the socket working face, sets up the outside anticorrosive coating on the socket working face.
The beneficial effects are that: and the bellmouth working surface of the bellmouth steel ring and the outer socket surface of the spigot steel ring are respectively provided with an anticorrosive layer, so that the exposed surfaces of the bellmouth steel ring and the spigot steel ring are effectively protected.
As a further improvement, the anti-corrosion layer, the inner anti-corrosion layer and the outer anti-corrosion layer are all pure zinc coatings or zinc alloy coatings.
As a further improvement, the prestressed steel wire is externally provided with a wrapping anti-corrosion layer, and the wrapping anti-corrosion layer is wrapped outside the prestressed steel wire in a fully-closed manner along the circumferential direction of the prestressed steel wire, so that when the prestressed steel wire is wound outside the pipe core and covered by the outer protective layer, the wrapping anti-corrosion layer is in contact with the pipe core and the outer protective layer.
The beneficial effects are that: the prestressed steel wire is wrapped with the corresponding wrapped anticorrosive layer in a totally-enclosed manner, so that the prestressed steel wire can be protected in all directions, even if the outer protective layer is damaged, the wrapped anticorrosive layer can still effectively protect the prestressed steel wire, the protection effect is ensured, and the service life of the pipeline is prolonged.
As a further improvement, the wrapping anticorrosion layer is a dip coating layer or a spray coating layer.
As a further improvement, the dip coating layer or the spray coating layer is an epoxy resin layer.
The beneficial effects are that: the epoxy resin layer is adopted to realize wrapping protection, and the epoxy resin has good anticorrosion and protection performance.
As a further improvement, the outer protective layer comprises an inner wet-sprayed mortar layer and an outer roll-shot mortar protective layer.
The beneficial effects are that: the outer protective layer comprises a wet water spraying mortar layer and a roller shooting mortar anti-corrosion layer, and the outer protective effect is conveniently guaranteed. The wet-sprayed cement mortar layer protects the wrapped anticorrosive layer on the prestressed steel wire, the protection effect is good, the production efficiency of the roller-shooting mortar protective layer is high, and the external protection effect is good.
As a further improvement, the prestressed concrete cylinder pipe also comprises an epoxy coal tar pitch anticorrosive coating, and the epoxy coal tar pitch anticorrosive coating is wrapped and arranged outside the outer protective layer.
The beneficial effects are that: the epoxy coal tar pitch anticorrosive coating is used for forming the anticorrosive protection to the concrete pipe from the whole outside, and the anticorrosive performance is further improved.
As a further improvement, when the coating anti-corrosion layer is a spray coating layer, the outer peripheral surface of the tube core is coated with a protective cushion layer, and the prestressed steel wires provided with the coating anti-corrosion layer are wound on the outer peripheral surface of the protective cushion layer.
The beneficial effects are that: the protective cushion layer is wrapped on the outer peripheral surface of the tube core, so that the wrapped anti-corrosion layer outside the prestressed steel wire can be effectively protected in the wire winding process, and meanwhile, the bonding and protection strength of the outer protective layer can be enhanced.
As a further improvement, the protective cushion layer is a glass fiber mesh fabric layer or a cement paste layer or an asbestos cushion layer.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment 1 of a prestressed concrete cylinder pipe provided by the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a schematic structural diagram of embodiment 2 of the prestressed concrete cylinder pipe provided by the present invention;
fig. 4 is a schematic structural diagram of embodiment 3 of the prestressed concrete cylinder pipe provided by the present invention;
FIG. 5 is an enlarged view of FIG. 4 at B;
fig. 6 is a schematic structural view of embodiment 4 of the prestressed concrete cylinder pipe according to the present invention.
Description of reference numerals:
in fig. 1 to 3: 1. a socket steel ring; 2. a socket steel ring; 3. a steel cylinder; 41. an inner wall concrete layer; 42. an outer wall concrete layer; 5. pre-burying an anchorage device; 6. prestressed steel wires; 7. wrapping an anticorrosive layer; 8. wet water-spraying mortar layer; 9. a mortar protective layer is shot by a roller; 12. epoxy coal tar pitch anticorrosive coating; 100. a die; 111. an anti-corrosion layer; 112. an inner anticorrosive layer; 113. and an outer anticorrosive layer.
In fig. 4 to 6: 6. prestressed steel wires; 7. wrapping an anticorrosive layer; 10. a protective cushion layer; 100. a die.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude a process, method, or article that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the term "provided" may be used in a broad sense, for example, the object provided may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The present invention will be described in further detail with reference to examples.
The utility model provides a concrete embodiment 1 of prestressing force steel cylinder concrete pipe:
the prestressed steel cylinder concrete pipe in the embodiment is specifically an embedded double-rubber-ring prestressed steel cylinder concrete pipe.
The structure of prestressing force steel cylinder concrete pipe is as shown in fig. 1 and fig. 2, wholly include tube core 100, the tube core axial is followed the fore-and-aft direction and is extended, tube core 100 has steel cylinder 3, bellmouth steel ring 1 and socket steel ring 2, steel cylinder 3 extends along the fore-and-aft direction, bellmouth steel ring 1 and socket steel ring 2 correspond coaxial welded connection at the front and back both ends of steel cylinder 3, and, tube core 100 here still includes inner wall concrete layer 41 and outer wall concrete layer 42, inner wall concrete layer 41 is located steel cylinder 3 inboard, outer wall concrete layer 42 is located the outside of steel cylinder 3, inner wall concrete layer 41 and outer wall concrete layer 42 are the loop configuration, the annular inner wall concrete layer forms the lumen, annular outer wall concrete layer outer peripheral face forms the outer peripheral face of tube core 100.
In order to ensure that the outer peripheral surface of the steel cylinder 3 is effectively protected, the outer peripheral surface of the steel cylinder 3 is provided with an anti-corrosion layer 111 for preventing the outer surface of the steel cylinder 3 from being corroded.
The bell steel ring 1 has a bell working surface on which an inner anticorrosive coating 112 is provided. The socket steel ring 2 is provided with a socket working surface, and an outer side anticorrosive layer 113 is arranged on the socket working surface. The inner anticorrosive layer 112 and the outer anticorrosive layer 113 are also pure zinc coatings formed by adopting an electric arc spraying mode, and form anticorrosive protection for the exposed outer surfaces of the socket steel ring 1 and the socket steel ring 2.
In this embodiment, the prestressed steel wire 6 is wound around the outer circumferential surface of the tube core 100 by a wire winding process to form a prestressed steel wire layer, and an outer protective layer is covered on the prestressed steel wire 6 to protect the prestressed steel wire 6.
Specifically, a wrapping anti-corrosion layer 7 is arranged outside the prestressed steel wire 6, the wrapping anti-corrosion layer 7 is wrapped outside the prestressed steel wire 6 in a totally-enclosed mode along the circumferential direction of the prestressed steel wire, in fact, the wrapping anti-corrosion layer 7 is a dip-coating layer, specifically, epoxy resin can be adopted, during processing and manufacturing, the epoxy resin can be dip-coated outside the prestressed steel wire 6, so that one epoxy resin layer is wrapped outside the prestressed steel wire 6, the wrapping anti-corrosion layer 7 is formed, the prestressed steel wire 6 wrapped with the epoxy resin layer is wound outside the tube core 100, and after the epoxy resin layer is cured, the corresponding outer protective layer is covered.
Therefore, when the prestressed steel wire 6 is wound outside the tube core 100 and covered by the outer protective layer, the wrapping anticorrosive layer 7 is in contact with the tube core 100 and the outer protective layer, the wrapping anticorrosive layer 7 can form omnibearing wrapping protection, and effective corrosion prevention is realized.
In addition, the outer peripheral surfaces of the front end and the rear end of the tube core 100 are respectively provided with the pre-embedded anchorage devices 5, so that the end parts of the prestressed steel wires 6 are positioned, and in order to ensure effective protection, the pre-embedded anchorage devices 5 and the front end and the rear end of the pre-embedded anchorage devices can be manually coated with epoxy resin protective layers.
In this embodiment, the coating anti-corrosion layer 7 mainly plays a role of anti-corrosion protection, and the epoxy resin is selected mainly because of its excellent properties, such as: the epoxy resin does not react with acid and alkali, has high chemical stability, and has the characteristics of high ductility, small drying shrinkage, excellent adhesion with the surface of the steel wire and the like, and is the best known steel wire anticorrosive paint. Epoxy has good insulating property, can obstruct the electrochemical corrosion of the steel wire and the outside, therefore, the epoxy coating is known as the strong defender of the corrosion prevention of the prestressed steel wire 6. The prestressed steel wire 6 is a core material for ensuring the bearing capacity of the PCCP pipeline, the prestressed steel cylinder concrete pipeline adopting the epoxy resin coating has the advantages that the service life is greatly prolonged, even the cathodic protection can be cancelled, and the harm of insufficient protection caused by the cathodic protection and hydrogen embrittlement damage caused by the over-protection can be avoided.
In this embodiment, the outer protective layer specifically includes an inner wet-sprayed cement mortar layer 8 and an outer roller-sprayed cement mortar protective layer 9, wherein the thickness of the wet-sprayed cement mortar layer 8 is greater than that of the prestressed steel wire layer, so as to form an effective coverage. The wet spraying cement mortar layer 8 adopts high-performance cement mortar, specifically polymer cement mortar or epoxy resin cement mortar can be adopted, during manufacturing, the prestressed wire 6 is wound on the tube core 100 after being dipped and coated with epoxy resin, wire winding is completed, after the epoxy resin is cured, a high-performance cement mortar layer is wet sprayed to form the wet spraying cement mortar layer 8, the epoxy resin layer is protected, after the wet spraying cement mortar layer 8 meets the requirement through maintenance strength, a mortar protective layer 9 is then rolled to maintain the whole prestressed steel cylinder concrete tube, and the bell and spigot is cleaned to realize anticorrosion protection.
In addition, an epoxy coal tar pitch anticorrosive layer 12 is wrapped and distributed outside a roller-shooting mortar protective layer 9 of the outer protective layer, during machining, after the wire winding is completed and the prestressed wire 6 is dipped and coated with epoxy resin and cured, a layer of high-performance cement mortar is wet-sprayed to protect the epoxy resin anticorrosive layer wrapped by the steel wire, after the high-performance cement mortar layer meets the requirement of maintenance strength, the roller-shooting cement mortar protective layer is sprayed, and finally, the epoxy coal tar pitch is sprayed for protection.
In the prestressed steel cylinder concrete pipe that this embodiment provided, adopt to form the parcel anticorrosive coating after the prestressed wire dip-coating epoxy, can form the effective protection of omnidirectional to the prestressed wire, the parcel anticorrosive coating thickness can be adjusted according to actual need, and the material of choosing for use can be epoxy, also can be other materials that possess good corrosion protection. The epoxy resin is used for protecting the prestressed steel wire, the corrosion resistance effect is excellent, and the service life of the pipeline is effectively prolonged.
Moreover, the prestressed steel wire wraps the anticorrosive coating, the outer peripheral surface of the steel cylinder, the surfaces of the bell mouth steel ring and the socket steel ring which are exposed outside are respectively coated with the pure zinc coating by electric arc spraying, the metal material part of the whole pipeline structure is effectively protected, the integral anticorrosive capability of the prestressed steel cylinder concrete pipe is further enhanced, and the service life of the pipeline is remarkably prolonged.
The utility model provides a concrete embodiment 2 of prestressing force steel cylinder concrete pipe:
the difference from the embodiment is mainly that: in the embodiment, the prestressed concrete cylinder pipe is embedded, and the prestressed steel wire is wound outside the outer concrete layer of the pipe core. In this embodiment, the prestressed concrete cylinder pipe is of a lining structure.
The structure of the prestressed concrete cylinder pipe in this embodiment is shown in fig. 3, where the pipe core 100 specifically includes a steel cylinder 3, a bellmouth steel ring 1 and a spigot steel ring 2, the bellmouth steel ring 1 and the spigot steel ring 2 are correspondingly and coaxially welded to the front and rear sides of the steel cylinder 3 in the front-rear direction, an annular pipe core concrete layer is arranged inside the steel cylinder 3, and a prestressed steel wire 6 is wound outside the steel cylinder 3 to form a prestressed steel wire layer.
In order to ensure that the outer peripheral surface of the steel cylinder 3 is effectively protected, the outer peripheral surface of the steel cylinder 3 is provided with an anti-corrosion layer 111 for preventing the outer surface of the steel cylinder 3 from being corroded.
The bell steel ring 1 has a bell working surface on which an inner anticorrosive coating 112 is provided. The socket steel ring 2 is provided with a socket working surface, and an outer side anticorrosive layer 113 is arranged on the socket working surface. The inner anticorrosive layer 112 and the outer anticorrosive layer 113 are also pure zinc coatings formed by adopting an electric arc spraying mode, and form anticorrosive protection for the exposed outer surfaces of the socket steel ring 1 and the socket steel ring 2.
The outer circumferential surface of the tube core 100 is wound with the prestressed wire 6 by a wire winding process to form a prestressed wire layer, and an outer protective layer is covered on the prestressed wire 6 for protecting the prestressed wire 6.
Specifically, the prestressed steel wire 6 is externally provided with a wrapping anticorrosive layer 7, the wrapping anticorrosive layer 7 is wrapped outside the prestressed steel wire 6 in a totally-enclosed manner along the circumferential direction of the prestressed steel wire, in fact, the wrapping anticorrosive layer 7 is a dip-coating layer, specifically, epoxy resin can be adopted, during processing and manufacturing, the epoxy resin can be dip-coated outside the prestressed steel wire 6 firstly, so that one epoxy resin layer is wrapped outside the prestressed steel wire 6, the wrapping anticorrosive layer 7 is further formed, the prestressed steel wire 6 wrapped with the epoxy resin layer is wound outside the tube core 100, and after the epoxy resin layer is cured, the corresponding outer protective layer is covered.
Similarly, the outer coating of the prestressed wire 6 is covered with an inner wet-sprayed mortar layer 8 and an outer roller-sprayed mortar layer 9 to form an outer coating, wherein the thickness of the wet-sprayed mortar layer 8 covers the prestressed wire layer to form an effective coating.
Of course, the outer protective layer is also wrapped with the epoxy coal tar pitch anticorrosive layer 12.
In fact, the prestressed steel wire with the coating corrosion protection layer can be applied not only to the embedded pipeline structure in example 1 and the lining structure in example 2, but also to the prestressed concrete cylinder pipe structure of other structures in the prior art, and as long as the prestressed steel wire is used, the prestressed steel wire with the coating corrosion protection layer can be applied to prestressed concrete cylinder pipes of a plurality of structure types listed in the national standard GB/T-, for example, the socket steel ring and the spigot steel ring as the joint steel ring can be of a single rubber ring structure or a double rubber ring structure.
The utility model provides a concrete embodiment 3 of prestressing force steel cylinder concrete pipe:
the difference from example 1 is mainly that: in example 1, the coating anti-corrosion layer outside the prestressed wire is a dip coating layer. In this embodiment, as shown in fig. 4 and 5, the coating anti-corrosion layer 7 outside the prestressed steel wire 6 is a spray coating layer, specifically, a powder electrostatic spray coating layer, and specifically, epoxy resin powder may be adopted, and a powder electrostatic spray coating process is utilized to form a coating type spray coating layer outside the prestressed steel wire, so as to form full-aspect anti-corrosion protection. According to the existing pipe core wire winding process, a set of spraying and cooling procedures are added in the wire winding process, so that the protected steel wire is prevented from being stored, put, pre-wound, stressed and the like, and the damage of a steel wire protective layer is avoided.
And, the outer peripheral surface of the tube core 100 is wrapped with a protective cushion layer 10, where the protective cushion layer 10 is specifically a glass fiber mesh fabric layer, and the prestressed steel wire 6 is wound outside the glass fiber mesh fabric layer by using a wire winding process, that is, the prestressed steel wire 6 is correspondingly wound and wrapped on the outer surface of the protective cushion layer 10 along the circumferential direction of the tube core 100 to form a prestressed steel wire layer.
The prestressed steel cylinder concrete pipe in this embodiment and the prestressed steel cylinder concrete pipe in embodiment 1 are both embedded, and other structures on the prestressed steel cylinder concrete pipe are the same as the corresponding structures of the prestressed steel cylinder concrete pipe in embodiment 1, and are not described herein again.
The utility model provides a concrete embodiment 4 of prestressing force steel cylinder concrete pipe:
the difference from example 2 is mainly that: in example 2, the coating anti-corrosion layer outside the prestressed wire is a dip coating layer. In this embodiment, as shown in fig. 6, the coating anti-corrosion layer 7 outside the prestressed steel wire 6 is a sprayed layer, specifically, a powder electrostatic sprayed layer, and specifically, epoxy resin powder may be used, and a coating type sprayed layer is formed by spraying outside the prestressed steel wire by using a powder electrostatic spraying process, so as to form an all-sided anti-corrosion protection. According to the existing pipe core wire winding process, a set of spraying and cooling procedures are added in the wire winding process, so that the protected steel wire is prevented from being stored, put, pre-wound, stressed and the like, and the damage of a steel wire protective layer is avoided.
And, the outer peripheral surface of the tube core 100 is wrapped with a protective cushion layer 10, where the protective cushion layer 10 is specifically a glass fiber mesh fabric layer, and the prestressed steel wire 6 is wound outside the glass fiber mesh fabric layer by using a wire winding process, that is, the prestressed steel wire 6 is correspondingly wound and wrapped on the outer surface of the protective cushion layer 10 along the circumferential direction of the tube core 100 to form a prestressed steel wire layer.
The prestressed concrete cylinder pipe in this embodiment and the prestressed concrete cylinder pipe in embodiment 2 are both lining structures, and other structures on the prestressed concrete cylinder pipe are the same as the corresponding structures of the prestressed concrete cylinder pipe in embodiment 2, and are not described again here.
In fact, in the embodiments 3 and 4, the protective cushion layer is a fiberglass mesh fabric layer, and in other embodiments, the protective cushion layer may also be a cement paste layer, which plays a corresponding protective role. Of course, the protective covering may also be an asbestos covering or other fibrous cloth covering.
The utility model provides a concrete embodiment 5 of prestressing force steel cylinder concrete pipe:
the difference from example 1 is mainly that: in example 1, the outer protective layer covering the prestressed steel wire is a double-layer protection. In this embodiment, the outer protective layer may also be a wet-sprayed mortar protective layer commonly used in the prior art according to actual needs, as long as appropriate protection is ensured
The utility model provides a concrete embodiment 6 of prestressing force steel cylinder concrete pipe:
the difference from example 1 is mainly that: in example 1, the anticorrosive layer, the inner anticorrosive layer, and the outer anticorrosive layer were all pure zinc coatings. In the embodiment, the anti-corrosion layer, the inner anti-corrosion layer and the outer anti-corrosion layer are all zinc alloy coatings.
Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made in the technical solutions described in the foregoing embodiments without inventive effort, or some technical features may be substituted in the equivalent. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A prestressed concrete cylinder pipe comprises a pipe core (100) axially extending in a front-rear direction, wherein the pipe core (100) is provided with a steel cylinder (3) extending in the front-rear direction; the prestressed concrete cylinder pipe also comprises a prestressed steel wire layer formed by correspondingly winding prestressed steel wires (6) outside the pipe core (100) along the circumferential direction of the pipe core (100), and an outer protective layer for protecting the prestressed steel wires (6) covers the outer side of the prestressed steel wires (6); the steel cylinder is characterized in that the outer peripheral surface of the steel cylinder (3) is provided with an anti-corrosion layer (111) for preventing the outer surface of the steel cylinder (3) from being corroded.
2. The prestressed concrete cylinder pipe according to claim 1, wherein the steel cylinder (3) has a bell mouth steel ring (1) welded coaxially to one end and a spigot steel ring (2) welded coaxially to the other end, the bell mouth steel ring (1) has a bell mouth working surface on which an inner corrosion protection layer (112) is provided, the spigot steel ring (2) has a spigot working surface on which an outer corrosion protection layer (113) is provided, of both ends in the front-rear direction.
3. The prestressed steel cylinder concrete pipe according to claim 2, wherein said corrosion protection layer (111), said inner corrosion protection layer (112) and said outer corrosion protection layer (113) are all pure zinc or zinc alloy coatings.
4. The prestressed concrete cylinder pipe according to claim 1, 2 or 3, wherein the prestressed steel wire (6) is externally provided with a wrapping anticorrosion layer (7), and the wrapping anticorrosion layer (7) is wrapped outside the prestressed steel wire (6) in a totally-enclosed manner along the circumferential direction of the prestressed steel wire, so that the wrapping anticorrosion layer (7) is in contact with the pipe core (100) and the outer protective layer when the prestressed steel wire (6) is wound outside the pipe core (100) and covered by the outer protective layer.
5. The prestressed steel cylinder concrete pipe according to claim 4, wherein said coating corrosion protection layer (7) is a dip coating layer or a spray coating layer.
6. The prestressed steel cylinder concrete pipe of claim 5, wherein said dip-coated or spray-coated layer is an epoxy layer.
7. Prestressed reinforced concrete cylinder pipe according to claim 4, characterized in that said outer protective layer comprises an inner wet-sprayed cement mortar layer (8) and an outer roller-blasted mortar protective layer (9).
8. The prestressed concrete cylinder pipe according to claim 7, further comprising an epoxy coal tar pitch anticorrosive layer (12), wherein the epoxy coal tar pitch anticorrosive layer (12) is wrapped and arranged outside the outer protective layer.
9. The prestressed concrete cylinder pipe as claimed in claim 5, wherein when the coating anticorrosion layer is a sprayed coating, the outer circumferential surface of the pipe core is coated with a protective cushion layer, and the prestressed steel wire provided with the coating anticorrosion layer is wound on the outer circumferential surface of the protective cushion layer.
10. The prestressed steel cylinder concrete pipe of claim 9, wherein said protective underlayment is a fiberglass mesh layer or a cement grout layer or an asbestos underlayment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122399182.2U CN217977802U (en) | 2021-09-30 | 2021-09-30 | Prestressed steel cylinder concrete pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122399182.2U CN217977802U (en) | 2021-09-30 | 2021-09-30 | Prestressed steel cylinder concrete pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217977802U true CN217977802U (en) | 2022-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122399182.2U Active CN217977802U (en) | 2021-09-30 | 2021-09-30 | Prestressed steel cylinder concrete pipe |
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|---|---|
| CN (1) | CN217977802U (en) |
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2021
- 2021-09-30 CN CN202122399182.2U patent/CN217977802U/en active Active
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