Corrosion-resistant high-strength magnesium-based prestressed pipe pile
By using magnesium-based prestressed materials in photovoltaic pipe piles, combining magnesium sulfur and magnesium chloride slurry layers, the corrosion problem of traditional pipe piles in high-salt environments is solved, and structural stability and durability are improved.
Patent Information
- Application Number
- CN202421996568.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-16
AI Technical Summary
Traditional concrete photovoltaic pipe piles are prone to corrosion in high-salt environments near the coast, mudflats and other areas, and cannot meet the requirements of service life and safety.
Magnesium-based prestressed pipe piles are used, including steel bars, magnesium sulfide slurry layer and magnesium oxychloride slurry layer. The magnesium sulfide slurry layer is compatible with the steel bars, and the magnesium oxychloride slurry layer is suitable for contact with seawater.
Photovoltaic pipe piles with stable structure and strong durability in high-salt environments are achieved, and the corrosion problem of traditional pipe piles is avoided.
Smart Images
Figure CN222908778U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of new energy photovoltaic pipe piles, and particularly relates to a magnesium-based prestressed pipe pile with corrosion resistance and high strength. Background Art
[0002] Photovoltaic power generation conforms to the development direction of national new energy. China's installed photovoltaic power generation capacity ranks among the top in the world and has been continuously expanding in recent years. Photovoltaic power generation is to install photovoltaic panels on open spaces to convert sunlight into electric energy. These photovoltaic panels are mounted on pipe piles and are distributed in the sea, on land, in tidal flats, mountains, grasslands and other places. According to different site and geological conditions, the construction methods of pipe piles are also different. In particular, offshore photovoltaic has also become an important field of new energy development.
[0003] However, for the photovoltaic industries in offshore and tidal flat areas, the soil salinization in tidal flats and offshore areas is serious, and the Cl - content is on the high side, which has strong corrosiveness to the upper and lower structures of metals and traditional prestressed concrete photovoltaic pipe piles and brackets. Traditional concrete pipe piles and brackets cannot meet the requirements of service life and safety in such an environment.
[0004] Therefore, how to develop a photovoltaic pipe pile with stable structure and strong durability is an urgent problem to be solved by those skilled in the art. Content of the Utility Model
[0005] The purpose of the utility model is to provide a magnesium-based prestressed pipe pile with corrosion resistance and high strength, which has a stable structure and strong durability.
[0006] To solve the above technical problems, the utility model provides a magnesium-based prestressed pipe pile with corrosion resistance and high strength, which includes steel bars, an inner layer of the pipe pile and an outer layer of the pipe pile. The outer layer of the pipe pile is arranged on the inner layer of the pipe pile. The steel bars are embedded in the inner layer of the pipe pile along the length direction. The inner layer of the pipe pile is a magnesium sulfate oxychloride slurry layer, and the outer layer of the pipe pile is a magnesium oxychloride slurry layer.
[0007] Optionally, in the above-mentioned magnesium-based prestressed pipe pile with corrosion resistance and high strength, an anticorrosive coating and an acid and alkali resistant coating are sequentially arranged on the surface of the steel bars from the inside to the outside.
[0008] Optionally, in the above-mentioned magnesium-based prestressed pipe pile with corrosion resistance and high strength, the anticorrosive coating and / or the acid and alkali resistant coating are sprayed on the surface of the steel bars by electroplating.
[0009] Optionally, in the above-mentioned magnesium-based prestressed pipe pile with corrosion resistance and high strength, the number of the steel bars is multiple, and the multiple steel bars are uniformly arranged along the circumferential direction of the inner layer of the pipe pile.
[0010] Optionally, in the above-mentioned magnesium-based prestressed pipe pile with corrosion resistance and high strength, the multiple steel bars form a steel cage.
[0011] Optionally, in the above-mentioned corrosion-resistant and high-strength magnesium-based prestressed pipe piles, the outer wall of the inner layer of the pipe pile and the inner wall of the outer layer of the pipe pile are in concave-convex fit.
[0012] Optionally, in the above-mentioned corrosion-resistant and high-strength magnesium-based prestressed pipe piles, a plurality of convex portions are provided on the outer wall of the inner layer of the pipe pile, and the plurality of convex portions are uniformly arranged along the circumferential direction of the inner layer of the pipe pile.
[0013] Optionally, in the above-mentioned corrosion-resistant and high-strength magnesium-based prestressed pipe piles, the cross-sectional shape of the convex portion is semicircular, trapezoidal, rectangular or triangular.
[0014] Optionally, in the above-mentioned corrosion-resistant and high-strength magnesium-based prestressed pipe piles, both the outer layer of the pipe pile and the inner layer of the pipe pile are in an annular shape.
[0015] Optionally, in the above-mentioned corrosion-resistant and high-strength magnesium-based prestressed pipe piles, the outer layer of the pipe pile completely wraps the side and both ends of the inner layer of the pipe pile.
[0016] The utility model provides a corrosion-resistant and high-strength magnesium-based prestressed pipe pile, and its beneficial effects are as follows:
[0017] The inner layer of the pipe pile wraps around the outside of the steel bar, the outer layer of the pipe pile wraps around the outside of the inner layer of the pipe pile, the inner layer of the pipe pile uses magnesium oxysulfate slurry, and the outer layer of the pipe pile uses magnesium oxychloride slurry. In the field of photovoltaic power generation, especially in offshore and tidal flat areas, the chloride ions contained in the magnesium oxychloride slurry material itself in this case have good compatibility with seawater and are suitable as the outer layer of the pipe pile to contact seawater.
[0018] Moreover, since there is a steel bar inside the pipe pile, the magnesium oxychloride slurry material is corrosive to the steel bar, while the magnesium oxysulfate slurry material itself does not contain chloride ions and has compatibility with the steel bar, and is suitable as the inner layer of the pipe pile to contact the steel bar. The magnesium-based prestressed pipe pile composed of the steel bar, the inner layer of the pipe pile and the outer layer of the pipe pile has the characteristics of stable structure and strong durability. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.
[0020] Figure 1 It is the front view of a part of the corrosion-resistant and high-strength magnesium-based prestressed pipe pile after being formed in the first prefabrication mold provided by the embodiment of the present utility model;
[0021] Figure 2Side view of a partially corrosion-resistant and high-strength magnesium-based prestressed pipe pile after being formed in the first precast mold provided by an embodiment of the present invention;
[0022] Figure 3 Front view of a partially corrosion-resistant and high-strength magnesium-based prestressed pipe pile after being formed in the second precast mold provided by an embodiment of the present invention;
[0023] Figure 4 Side view of a partially corrosion-resistant and high-strength magnesium-based prestressed pipe pile after being formed in the second precast mold provided by an embodiment of the present invention.
[0024] In the above figure:
[0025] 100 - Steel bar;
[0026] 200 - Inner layer of the pipe pile; 210 - Convex part;
[0027] 300 - Outer layer of the pipe pile. Detailed implementation manners
[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.
[0029] The core of the present invention is to provide a corrosion-resistant and high-strength magnesium-based prestressed pipe pile with stable structure and strong durability.
[0030] In order to enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] Specifically, please refer to Figures 1-4 , a corrosion-resistant and high-strength magnesium-based prestressed pipe pile provided by the present invention includes a steel bar 100, an inner layer 200 of the pipe pile, and an outer layer 300 of the pipe pile.
[0032] The outer layer 300 of the pipe pile is arranged on the outside of the inner layer 200 of the pipe pile. The steel bar 100 is embedded in the inner layer 200 of the pipe pile along the length direction. The inner layer 200 of the pipe pile is a magnesium oxysulfate slurry layer, and the outer layer 300 of the pipe pile is a magnesium oxychloride slurry layer.
[0033] It should be noted that due to the higher requirements for the corrosion resistance of photovoltaic pipe piles in the field of photovoltaic power generation, through continuous exploration, it has been found that high-strength, corrosion-resistant, and environmentally controllable magnesium oxysulfate slurry and magnesium oxychloride slurry can be used to replace traditional concrete materials. Magnesium oxysulfate slurry and magnesium oxychloride slurry belong to magnesium-based cementitious materials. The products made of magnesium-based cementitious materials have the characteristics of light weight, high strength, corrosion resistance, wear resistance, long service life, and good heat insulation.
[0034] The material slurry of the magnesium oxysulfate slurry layer itself does not contain chloride ions and has no corrosive effect on the steel bar 100, and can be used as the slurry layer for wrapping the steel bar 100. Moreover, the magnesium oxysulfate slurry can also be compatible with the magnesium oxychloride slurry, but its compatibility with seawater is not as good as that of the magnesium oxychloride material. The material slurry of the magnesium oxychloride slurry layer contains chloride ions in itself and can have good compatibility with seawater, and its strength does not decrease but increases instead. Therefore, it can be wrapped on the outside of the magnesium oxysulfate slurry layer. The disadvantage of the magnesium oxychloride slurry layer is that the chloride ions are corrosive to the steel bar 100. Therefore, by using the magnesium oxysulfate slurry layer to isolate from the steel bar 100, the strength of the steel bar 100 can be effectively guaranteed and the steel bar 100 can be prevented from being corroded.
[0035] A corrosion-resistant and high-strength magnesium-based prestressed pipe pile provided by the present utility model adopts a pipe pile inner layer 200 wrapped outside the steel bar 100, and a pipe pile outer layer 300 wrapped outside the pipe pile inner layer 200. The pipe pile inner layer 200 uses magnesium oxysulfate slurry, and the pipe pile outer layer 300 uses magnesium oxychloride slurry. In the field of photovoltaic power generation, especially in offshore and tidal flat areas, the chloride ions contained in the magnesium oxychloride slurry material itself in this case have good compatibility with seawater and are suitable for being in contact with seawater as the pipe pile outer layer 300.
[0036] Also, since there is a steel bar 100 inside the pipe pile, the magnesium oxychloride slurry material is corrosive to the steel bar 100, while the magnesium oxysulfate slurry material itself does not contain chloride ions and has compatibility with the steel bar 100, and is suitable for being in contact with the steel bar 100 as the pipe pile inner layer 200. The magnesium-based prestressed pipe pile composed of the steel bar 100, the pipe pile inner layer 200, and the pipe pile outer layer 300 has the characteristics of stable structure and strong durability.
[0037] In order to further improve the surface performance of the steel bar 100, an anti-corrosion coating and an acid and alkali resistant coating are sequentially arranged on the surface of the steel bar 100 from the inside to the outside. Specifically, the two layers of coatings outside the steel bar 100 can be coated by electroplating.
[0038] First, an anti-corrosion coating containing aluminum (or zinc) is electroplated on the surface of the steel bar 100 as the bottom layer to play an anti-corrosion function; secondly, on the basis of the bottom layer, a special process is used to coat a second layer of acid and alkali resistant coating composed of components such as polymer resin, graphene (or lubricating material) as the secondary coating to further improve the acid and alkali resistance and other capabilities. By using the coatings provided in the above embodiments, the surface of the steel bar 100 has excellent adhesion, heavy anti-corrosion, and acid and alkali resistant properties.
[0039] In a specific embodiment, the magnesium oxychloride slurry layer includes magnesium oxide, magnesium chloride / bittern, a modifier, and stone particles. The modifier includes at least one of an anti-bittern enhancer, a toughening and solvent-reducing agent, an antifoaming agent, and a curing agent. The stone particles, as auxiliary materials, can be in different forms such as stones, gravels, or sands.
[0040] The magnesium sulfate oxychloride slurry layer includes magnesium oxide, magnesium sulfate, a modifier, silica fume, and stone particles. The modifier includes at least one of a magnesium sulfate oxychloride modifier, a waterproofing agent, a curing agent, and an antifoaming agent. The stone particles, as auxiliary materials, can be in different forms such as stones, gravels, or sands. The silica fume can increase the strength.
[0041] In a specific embodiment, the number of the steel bars 100 is multiple, and the multiple steel bars 100 are uniformly arranged along the circumferential direction of the inner layer 200 of the pipe pile. The multiple steel bars 100 can be connected together by binding to form a cage-shaped steel bar framework, that is, a steel bar cage, which has the functions of solidifying the fluid and enhancing the strength. The binding of the steel bar cage adopts mechanized operation, with high speed and good effect.
[0042] To improve the connection stability between the inner layer 200 and the outer layer 300 of the pipe pile, the outer wall of the inner layer 200 of the pipe pile and the inner wall of the outer layer 300 of the pipe pile are in concave-convex fit. That is, in one form, convex portions 210 are provided on the outer wall of the inner layer 200 of the pipe pile, and concave portions that cooperate with the convex portions 210 are provided on the inner wall of the outer layer 300 of the pipe pile at relative positions. In another form, concave portions are provided on the outer wall of the inner layer 200 of the pipe pile, and convex portions 210 that cooperate with the concave portions are provided on the inner wall of the outer layer 300 of the pipe pile at relative positions. The cross-sectional shape of the convex portion 210 can be semicircular, trapezoidal, rectangular, triangular, etc., and the concave portion matches the convex portion 210, which is not further limited herein.
[0043] Furthermore, the number of the convex portions 210 can be one or more. The multiple convex portions 210 can be uniformly arranged along the circumferential direction of the inner layer 200 of the pipe pile.
[0044] As Figure 3 shown, the cross-sections of both the outer layer 300 and the inner layer 200 of the pipe pile are in an annular shape, and the whole is in a cylindrical tubular structure. The outer layer 300 of the pipe pile is closely attached to the inner layer 200 of the pipe pile and completely wraps the side and both ends of the tubular inner layer 200. A through hole is provided along the length direction at the center of the inner layer 200 of the pipe pile.
[0045] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, product, or device that includes the element.
[0046] Among them, in the description of the embodiments of this application, unless otherwise specified, " / " means "or". For example, A / B may mean A or B; "and / or" herein is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "a plurality of" means two or more than two.
[0047] In the description of this application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.
[0048] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.
[0049] Specific examples are used in this article to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.
Claims
1. A corrosion-resistant and high-strength magnesium-based prestressed pipe pile, characterized in that: The invention comprises steel bars, a pipe pile inner layer and a pipe pile outer layer, wherein the pipe pile outer layer is arranged on the outside of the pipe pile inner layer, the steel bars are embedded in the pipe pile inner layer along the length direction, the pipe pile inner layer is a magnesium oxysulfate slurry layer, and the pipe pile outer layer is a magnesium oxychloride slurry layer.
2. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 1 is characterized in that: The surface of the steel bar is provided with an anti-corrosion coating and an acid-alkali resistant coating in sequence from the inside to the outside.
3. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 2 is characterized in that: The anti-corrosion coating and / or the acid-alkali resistant coating is sprayed on the surface of the steel bar by electroplating.
4. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 1 is characterized in that: The number of the steel bars is multiple, and the multiple steel bars are evenly arranged along the circumference of the inner layer of the pipe pile.
5. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 4 is characterized in that: A plurality of the steel bars form a steel bar cage.
6. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to any one of claims 1 to 5, characterized in that: One of the outer wall of the inner layer of the pipe pile and the inner wall of the outer layer of the pipe pile is provided with a convex portion on its surface, and the other is provided with a concave portion on its surface.
7. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 6, characterized in that: A plurality of convex parts are arranged on the outer wall of the inner layer of the pipe pile, and the plurality of convex parts are evenly arranged along the circumference of the inner layer of the pipe pile.
8. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 6, characterized in that: The cross-sectional shape of the convex portion is semicircular, trapezoidal, rectangular or triangular.
9. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 1, characterized in that: The outer layer of the pipe pile and the inner layer of the pipe pile are both in annular shape.
10. The corrosion-resistant and high-strength magnesium-based prestressed pipe pile according to claim 9, characterized in that: The outer layer of the pipe pile completely wraps around the side surfaces and both ends of the inner layer of the pipe pile.