Environment-friendly corrosion-resistant PCM color-coated steel sheet

Abstract

The utility model provides a kind of environment-friendly corrosion-resistant PCM color coated steel sheet, including steel plate body;First slope and second slope are respectively set in steel plate body both sides, for increasing the butt joint area of steel plate body both sides;Groove and boss are respectively set in the outside of first slope and second slope, boss outer end is limited in the inner wall of groove, for ensuring the stable location of first slope and second slope when butt joint;First sealing groove and second sealing groove are respectively set in the outside of first slope and second slope upper and lower end, sealing strip for cooperating second sealing groove is arranged in first sealing groove, for sealing the place of first slope and second slope adhesion. The utility model realizes the butt joint without welding of steel plate body, also effectively avoids that external moisture penetrates and remains in gap, to cause corrosion to steel plate body.

Description

Technical Field

[0001] This utility model relates to the field of metal sheet technology, and in particular to an environmentally friendly and corrosion-resistant PCM color-coated steel sheet. Background Technology

[0002] PCM color-coated steel sheets are composite panels formed by coating one or more organic / inorganic coatings on the surface of metal substrates (such as cold-rolled steel sheets, galvanized steel sheets, aluminum sheets, etc.) and curing them at high temperatures. They are decorative, corrosion-resistant and functional.

[0003] In existing modular applications, PCM color-coated steel sheets primarily rely on welding or bolt connections. However, during welding, the heat can cause coating ablation and coarsening of the substrate grains, leading to decreased corrosion resistance. Furthermore, welding generates fumes containing heavy metals such as manganese and nickel, which is detrimental to environmental standards during construction. Conversely, bolt connections create gaps between the bolt holes and the PCM color-coated steel sheet, allowing external moisture to penetrate and remain in these gaps, corroding the PCM color-coated steel sheet substrate. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes an environmentally friendly and corrosion-resistant PCM color-coated steel sheet.

[0005] To address the aforementioned issues with existing PCM color-coated steel sheets used in modular applications, which primarily rely on welding or bolting connections, and the problems arising from welding heat leading to coating ablation, substrate grain coarsening, and decreased corrosion resistance; furthermore, welding generates fumes containing heavy metals such as manganese and nickel, which is detrimental to environmental standards during construction. Additionally, bolted connections create gaps between the bolt holes and the PCM color-coated steel sheet, allowing external moisture to penetrate and remain, corroding the PCM color-coated steel sheet substrate. The technical solution adopted in this invention is: An environmentally friendly and corrosion-resistant PCM color-coated steel sheet, comprising a steel sheet body; The first and second inclined surfaces are respectively opened on both sides of the steel plate body to increase the mating area on both sides of the steel plate body. The groove and the boss are respectively formed on the outer side of the first inclined surface and the second inclined surface. The outer end of the boss abuts against and is limited by the inner wall of the groove to ensure the stable positioning of the first inclined surface and the second inclined surface during docking. The first sealing groove and the second sealing groove are respectively opened on the outer sides of the upper and lower ends of the first inclined surface and the second inclined surface. A sealing strip is provided in the first sealing groove to cooperate with the second sealing groove and to seal the joint between the first inclined surface and the second inclined surface.

[0006] Preferably, the first inclined surface and the second inclined surface are symmetrically distributed on both sides of the steel plate body, and the inner wall of the groove matches the outer end of the boss.

[0007] Preferably, the side end of the sealing strip away from the first sealing groove abuts against the inner wall of the second sealing groove.

[0008] Preferably, the steel plate body has connecting holes through both sides, and bolts are connected to the inner walls of the connecting holes.

[0009] Preferably, the connecting holes pass through the groove and the boss respectively, and a sealing plug is interference-fitted to the outer end opening of the connecting hole, and the sealing plug is made of flexible rubber material.

[0010] Preferably, the outer end of the steel plate body is coated with a composite coating to improve the corrosion resistance of the steel plate body.

[0011] Preferably, the composite coating consists of a primer layer, an intermediate layer, and a topcoat layer.

[0012] Preferably, the primer layer is a water-based epoxy zinc-rich coating, the intermediate layer is a graphene polyester coating, and the topcoat layer is a fluorocarbon coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention simply requires the first and second inclined surfaces to be fitted together. During the fitting process, the outer end of the boss simultaneously abuts against and is confined to the inner wall of the groove. The precise confinement of the boss by the groove ensures the stability and confinement effect of the first and second inclined surfaces during docking, effectively preventing slippage. When the outer end of the boss abuts against and is confined to the inner wall of the groove, the side end of the sealing strip also simultaneously abuts against the inner wall of the second sealing groove, thus achieving a tight seal at the joint between the upper and lower ends of the first and second inclined surfaces. This effectively prevents external moisture from seeping in over a large area through the joint and corroding the steel plate body. This invention also involves installing bolts inside the connecting holes during the process of the first and second inclined surfaces fitting together. The tight fit between the bolts and the grooves and bosses ensures a stable connection between the steel plates. After the steel plates are joined together, a sealing plug is used to tightly seal the opening at the outer end of the connecting hole. This not only achieves a weld-free connection between the steel plates but also effectively prevents external moisture from seeping in and remaining in the gaps, thus avoiding corrosion of the steel plates. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is a partial structural diagram of point A of the present invention; Figure 3 This is a partial cross-sectional view of point A of the present invention.

[0015] Reference numerals in the attached drawings: 1. Steel plate body; 2. First inclined surface; 3. Second inclined surface; 4. Groove; 5. Boss; 6. First sealing groove; 7. Second sealing groove; 8. Sealing strip; 9. Connecting hole; 10. Bolt; 11. Sealing plug. Detailed Implementation

[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0017] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0018] Please see Figure 1 - Figure 3 This embodiment proposes an environmentally friendly and corrosion-resistant PCM color-coated steel sheet, which includes a steel sheet body 1, with a composite coating (not shown in the figure) covering its outer end. The composite coating enhances the corrosion resistance of the steel sheet body 1.

[0019] Specifically, the composite coating consists of three layers: a primer layer, an intermediate layer, and a topcoat layer. The primer layer uses a water-based epoxy zinc-rich coating, which effectively protects and inhibits the corrosion process of the steel plate 1. The intermediate layer uses a graphene polyester coating; thanks to the barrier effect formed by the graphene sheets in the coating, it significantly reduces the permeability of external moisture. The topcoat layer uses a fluorocarbon coating, with fluoropolymers (such as polyvinylidene fluoride PVDF and tetrafluoroethylene-vinyl ether copolymer FEVE) as the main film-forming material. Due to the small atomic radius and high electronegativity of fluorine, the surface of the composite coating is extremely smooth, forming a unique "lotus leaf effect," effectively reducing the adhesion of water and impurities, thereby further improving the corrosion resistance of the steel plate 1.

[0020] On both sides of the steel plate body 1, a first inclined surface 2 and a second inclined surface 3 are respectively formed for docking. These two inclined surfaces are symmetrically distributed with reference to both sides of the steel plate body 1, increasing the docking area on both sides of the steel plate body 1. On the outer sides of the first inclined surface 2 and the second inclined surface 3, a groove 4 and a boss 5 are respectively formed, and the inner wall of the groove 4 matches the outer end of the boss 5, ensuring that the outer end of the boss 5 can tightly abut against and be confined within the inner wall of the groove 4.

[0021] Furthermore, a first sealing groove 6 and a second sealing groove 7 are respectively formed on the outer sides of the upper and lower ends of the first inclined surface 2 and the second inclined surface 3. A sealing strip 8 is adhered to the inner wall of the first sealing groove 6, and the side end of the sealing strip 8 away from the first sealing groove 6 tightly abuts against the inner wall of the second sealing groove 7. Several connecting holes 9 are also formed through both sides of the steel plate body 1. These connecting holes 9 pass through the groove 4 and the boss 5 respectively. Bolts 10 are connected to the inner wall of the connecting holes 9. Through the cooperation of the bolts 10 with the groove 4 and the boss 5, a stable installation connection of the steel plate body 1 is achieved. At the same time, a sealing plug 11 made of flexible rubber material is interference-fitted at the outer opening of the connecting hole 9 to tightly seal the opening of the connecting hole 9.

[0022] Please continue reading. Figure 1 - Figure 3 In practical use, simply attach the first inclined surface 2 and the second inclined surface 3 together. During the attachment process, the outer end of the boss 5 will simultaneously abut against and be limited by the inner wall of the groove 4. The precise limitation of the boss 5 by the groove 4 ensures the stability and limiting effect of the first inclined surface 2 and the second inclined surface 3 during docking, effectively preventing slippage. When the outer end of the boss 5 abuts against and is limited by the inner wall of the groove 4, the side end of the sealing strip 8 will also simultaneously abut against the inner wall of the second sealing groove 7, thereby achieving a tight seal at the joint of the upper and lower ends of the first inclined surface 2 and the second inclined surface 3, effectively preventing external moisture from seeping in over a large area through the joint and corroding the steel plate body 1.

[0023] Simultaneously, during the process of the first inclined surface 2 and the second inclined surface 3 fitting together, the bolt 10 is installed inside the connecting hole 9. Through the tight fit between the bolt 10 and the groove 4 and the boss 5, a stable installation connection of the steel plate body 1 is achieved. After the steel plate bodies 1 are joined together, the outer opening of the connecting hole 9 is tightly sealed by the sealing plug 11. This not only achieves a weld-free but also effectively prevents external moisture from seeping in and remaining in the gaps, thus avoiding corrosion of the steel plate body 1.

[0024] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An environmentally friendly, corrosion-resistant PCM color-coated steel sheet, characterized in that, Including the steel plate body; The first and second inclined surfaces are respectively opened on both sides of the steel plate body to increase the mating area on both sides of the steel plate body. The groove and the boss are respectively formed on the outer side of the first inclined surface and the second inclined surface. The outer end of the boss abuts against and is limited by the inner wall of the groove to ensure the stable positioning of the first inclined surface and the second inclined surface during docking. The first sealing groove and the second sealing groove are respectively opened on the outer sides of the upper and lower ends of the first inclined surface and the second inclined surface. A sealing strip is provided in the first sealing groove to cooperate with the second sealing groove and to seal the joint between the first inclined surface and the second inclined surface.

2. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 1, characterized in that, The first and second inclined surfaces are symmetrically distributed on both sides of the steel plate body, and the inner wall of the groove matches the outer end of the boss.

3. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 2, characterized in that, The side of the sealing strip away from the first sealing groove abuts against the inner wall of the second sealing groove.

4. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 1, characterized in that, The steel plate body has connecting holes on both sides, and bolts are connected to the inner walls of the connecting holes.

5. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 4, characterized in that, The connecting holes pass through the groove and the boss respectively, and a sealing plug is interference-fitted at the outer end opening of the connecting hole, and the sealing plug is made of flexible rubber material.

6. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 1, characterized in that, The outer end of the steel plate is coated with a composite coating to improve the corrosion resistance of the steel plate.

7. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 6, characterized in that, The composite coating consists of a primer layer, an intermediate layer, and a topcoat layer.

8. The environmentally friendly and corrosion-resistant PCM color-coated steel sheet according to claim 7, characterized in that, The primer layer is a water-based epoxy zinc-rich coating, the intermediate layer is a graphene polyester coating, and the topcoat layer is a fluorocarbon coating.

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