An environmentally friendly wear-resistant polyurethane color steel plate

Abstract

The present invention discloses an environmentally friendly wear-resistant polyurethane color steel plate, which relates to the technical field of polyurethane color steel plates. The environmentally friendly wear-resistant polyurethane color steel plate includes: a multi-convex color steel plate, which is a color steel plate with convex parts formed by rolling or stamping a flat color steel plate. The convex parts enclose a closed polygonal structure, and the polygonal structures are arranged continuously in a matrix, and adjacent two polygonal structures share side walls; and a polyurethane layer, the polyurethane plate is sandwiched between two layers of multi-convex color steel plates, and the convex parts are located on the side of the multi-convex color steel plate away from the polyurethane layer to withstand external wear. For the environmentally friendly wear-resistant polyurethane color steel plate, a multi-convex color steel plate is provided. The multi-convex color steel plate is a color steel plate with convex parts formed by rolling or stamping a flat color steel plate, forming a continuous compressive grid, and then the external load can be dispersed by reducing the contact area of the outer surface of the color steel plate, reducing friction and wear.

Description

Technical Field

[0001] The present invention relates to the technical field of polyurethane color steel plates, and specifically to an environmentally friendly and wear-resistant polyurethane color steel plate. Background Art

[0002] In the prior art, polyurethane sandwich panels are used inside color steel plates to achieve the heat preservation function of building structures made of color steel plates. Generally, polyurethane insulation boards are inserted into frame-type color steel plates, and then a colloid is applied between the color steel plates and the polyurethane sandwich panels to achieve connection.

[0003] For example, a polyurethane color steel plate connection structure proposed in the patent with the application number CN201920369594.1 adopts a structure of double-layer color steel plates sandwiching a polyurethane board.

[0004] However, in the prior art, the outer surface of color steel plates is subject to a large amount of external wear indoors and outdoors, which easily leads to scratches, breakages, and wear marks, and the service life will also be reduced accordingly. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an environmentally friendly and wear-resistant polyurethane color steel plate, which solves the problem that the outer surface of the color steel plate in the prior art is subject to a large amount of external wear indoors and outdoors, easily leading to scratches, breakages, wear marks, and a corresponding reduction in service life.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: An environmentally friendly and wear-resistant polyurethane color steel plate, comprising:

[0007] A multi-convex color steel plate, which is a color steel plate with convex parts formed by rolling or stamping a flat color steel plate. The convex parts enclose a closed polygon structure, and the polygon structures are arranged continuously in a matrix. Adjacent two polygon structures share side walls; and

[0008] A polyurethane layer, with the polyurethane board sandwiched between two layers of multi-convex color steel plates. The convex parts are located on the side of the multi-convex color steel plate away from the polyurethane layer to withstand external wear.

[0009] Further, the outer surface of the convex part is roller-coated with a wear-resistant coating, and the wear-resistant coating is a fluorocarbon coating or a ceramic coating.

[0010] Further, the color steel plate in the area of the polygon structure forms a panel area, and the convex part forms a stamping depression on the side close to the polyurethane layer;

[0011] It further includes a polygon reinforcing ridge, which is embedded in the stamping depression, and the polygon reinforcing ridge is used to support the convex part and enhance the strength of the convex part;

[0012] The thickness of the polygonal reinforcing ridge is equal to the groove depth of the stamping recess.

[0013] Furthermore, the groove depth of the stamping recess is 10 mm - 15 mm;

[0014] The thickness of the color steel plate is 0.3 mm - 1.2 mm.

[0015] Furthermore, one end of the polyurethane layer protrudes from the multi-convex color steel plate to form a plug end, and the other end of the polyurethane layer is recessed in the multi-convex color steel plate to form a socket end. The plug end of one of the environmentally friendly wear-resistant polyurethane color steel plates is inserted into the socket end of another environmentally friendly wear-resistant polyurethane color steel plate, forming a state where adjacent environmentally friendly wear-resistant polyurethane color steel plates are docked.

[0016] Furthermore, the polygonal structure is a hexagonal structure, and the hexagonal structure can form a honeycomb shape on the surface of the multi-convex color steel plate;

[0017] The stamping recesses of individual hexagons on both sides of the multi-convex color steel plate near the plug end and the socket end are all semi-hexagonal grooves, and two adjacent semi-hexagons form a Y-shaped groove;

[0018] One side of the polygonal reinforcing ridge near the plug end fills the Y-shaped groove of the socket end, and a Y-shaped limiting frame is arranged at intervals on one side of the polygonal reinforcing ridge near the plug end, and the Y-shaped limiting frame protrudes from the multi-convex color steel plate. A notch area is provided in the area of the polygonal reinforcing ridge near the socket end opposite to the Y-shaped limiting frame;

[0019] The Y-shaped limiting frame of one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in the Y-shaped groove of another environmentally friendly wear-resistant polyurethane color steel plate

[0020] Furthermore, the polygonal structure is a quadrilateral structure;

[0021] The stamping recesses of individual quadrilaterals on both sides of the multi-convex color steel plate near the plug end and the socket end are all complete quadrilateral grooves;

[0022] One end of the polygonal reinforcing ridge near the plug end protrudes from the multi-convex color steel plate by at least one grid, and one end of the polygonal reinforcing ridge near the socket end is recessed in the multi-convex color steel plate by at least one grid;

[0023] One grid that protrudes of one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in one grid that is recessed of another environmentally friendly wear-resistant polyurethane color steel plate.

[0024] Furthermore, the width of the bottom of the stamping recess is equal to or greater than the width of the notch.

[0025] Further, the polyurethane layer includes a high-density polyurethane layer, transition regions on both sides of the high-density polyurethane layer, and a low-density polyurethane layer on the side of the transition region away from the high-density polyurethane layer;

[0026] The density of the high-density polyurethane layer is 40 - 48 kg / m³;

[0027] The density of the low-density polyurethane layer is 30 - 35 kg / m³;

[0028] The density of the transition region is 35 - 40 kg / m³.

[0029] Further, a corrugated reinforcement skeleton is embedded in the low-density polyurethane layer, and the corrugated reinforcement skeleton is a perforated hollow frame.

[0030] The present invention has the following beneficial effects:

[0031] (1) For the environmentally friendly wear-resistant polyurethane color steel plate, a multi-convex color steel plate is provided. The multi-convex color steel plate is a color steel plate with raised parts formed by rolling or stamping a flat color steel plate. The raised parts enclose a closed polygonal structure, and the polygonal structures are arranged continuously in a matrix. Adjacent two polygonal structures share side walls, so that the polygonal structures are closely arranged to form a continuous compressive grid, and then the external load can be dispersed by reducing the contact area of the outer surface of the color steel plate (about 40% - 60% reduction), reducing friction and wear.

[0032] (2) For the environmentally friendly wear-resistant polyurethane color steel plate, a polygonal reinforcing ridge is provided. The polygonal reinforcing ridge is embedded in the stamping recess, so that on the one hand, the polygonal reinforcing ridge can support the raised part 1 and strengthen the strength of the raised part, and on the other hand, it can also improve the strength of the convex color steel plate as a whole.

[0033] (3) For the environmentally friendly wear-resistant polyurethane color steel plate, by setting a polyurethane layer with a density gradient change, under the combined action of the honeycomb-shaped raised part and the polyurethane layer, the external pressure is first dispersed by the honeycomb unit side walls and evenly transmitted to the high-density polyurethane layer through the low-density polyurethane layer and the transition region. The system works in coordination, and the impact resistance is greatly improved.

[0034] (4) For the environmentally friendly wear-resistant polyurethane color steel plate, two environmentally friendly wear-resistant polyurethane color steel plates are initially locked by the structural characteristics of the polygonal structure itself, and then further reinforced with air gun nails after the initial locking, which is more convenient.

[0035] Of course, it is not necessary for any product implementing the present invention to achieve all the above advantages simultaneously. Description of the Drawings

[0036] Figure 1Overall view of Embodiment 1 of the present invention;

[0037] Figure 2 Partial view of the multi-convex color steel plate in Embodiment 1 of the present invention;

[0038] Figure 3 Partial view of the multi-convex color steel plate from another perspective in Embodiment 1 of the present invention;

[0039] Figure 4 Exploded view of Embodiment 1 of the present invention;

[0040] Figure 5 Structural schematic diagram of the polygonal reinforcing ridge in Embodiment 1 of the present invention;

[0041] Figure 6 Assembly diagram of plate a and plate b in Embodiment 1 of the present invention;

[0042] Figure 7 Schematic diagram of two multi-convex color steel plates with polygonal reinforcing ridges before assembly in Embodiment 1 of the present invention;

[0043] Figure 8 Schematic diagram of the equal width of the bottom and top of the groove of the stamping recess in Embodiment 1 of the present invention;

[0044] Figure 9 Schematic diagram of the width of the bottom of the stamping recess being greater than the width of the top in Embodiment 1 of the present invention;

[0045] Figure 10 Schematic diagram of the corrugated reinforcement skeleton of the present invention;

[0046] Figure 11 Schematic diagram of two multi-convex color steel plates with polygonal reinforcing ridges before assembly in Embodiment 2 of the present invention.

[0047] In the figure, 1. multi-convex color steel plate; 101. convex part; 102. panel area; 103. stamping recess; 1031. Y-shaped groove; 104. wear-resistant coating; 2. polygonal reinforcing ridge; 201. PVC layer; 202. high-strength steel mesh; 21. Y-shaped limiting frame; 22. notch area; 3. polyurethane layer; 31. low-density polyurethane layer; 32. high-density polyurethane layer; 33. corrugated reinforcement skeleton; 34. transition area. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] According to the following Figures 1-11 The environmentally friendly wear-resistant polyurethane color steel plate provided by an embodiment of the present invention is described.

[0051] Embodiment 1:

[0052] See also Figures 1-3 As shown, an embodiment of the present invention provides an environmentally friendly wear-resistant polyurethane color steel plate, including a multi-convex color steel plate 1. The initial form of the multi-convex color steel plate 1 is a flat color steel plate. When obtaining the multi-convex color steel plate 1, the flat color steel plate is rolled or stamped to form a convex portion 101 on the flat color steel plate. The convex portion 101 is enclosed into a closed polygonal structure. The color steel plates in the area within the polygonal structure form a panel area 102, and the polygonal structures are continuously arranged in a matrix. Two adjacent polygonal structures share side walls, so that the polygonal structures are closely arranged to form a continuous pressure-resistant grid. Then, the external load can be dispersed and the friction and wear can be reduced by reducing the contact area of the outer surface of the environmentally friendly wear-resistant polyurethane color steel plate provided by the embodiment of the present invention (reduced by about 40%-60%). In addition, due to the protruding state of the convex portion 101, the mechanical collision of the panel area 102 with the outside is greatly reduced, thereby further reducing the wear of the panel area.

[0053] like Figure 1 In addition, a sandwich polyurethane layer 3 is arranged between the two layers of multi-convex color steel plates 1, and the polyurethane layer 3 plays a role of heat preservation. It should be noted that the raised portion 101 is located on the side of the multi-convex color steel plate 1 away from the polyurethane layer 3, rather than on the side close to the polyurethane layer 3. The polyurethane layer 3 and the multi-convex color steel plate 1 are connected by gluing.

[0054] Preferably, the outer surface of the raised portion 101 is roll-coated with a wear-resistant coating 104, so that the raised portion 101 can have a stronger resistance when subjected to external collision and wear.

[0055] Optionally, the wear-resistant coating 104 is a fluorocarbon coating or a ceramic coating.

[0056] In the process of manufacturing the multi-convex color steel plate 1 described above, since the convex part 101 is formed by stamping or rolling, a stamping depression 103 will be formed on the side close to the polyurethane layer 3. Due to the small thickness and easy deformation of the color steel plate in the prior art, in order to improve the compressive capacity of the convex part 101, a polygonal reinforcing rib 2 is also provided here. Refer to Figure 4 , the polygonal reinforcing rib 2 is embedded in the stamping depression 103. Thus, on the one hand, the polygonal reinforcing rib 2 can support the convex part 101 and strengthen the strength of the convex part 101, and on the other hand, it can also improve the strength of the multi-convex color steel plate 1 as a whole.

[0057] Such as Figure 5 , preferably, the polygonal reinforcing rib 2 is substantially composed of two layers. The side close to the polyurethane layer 3 is a PVC layer 201, and the side far from the polyurethane layer 3 is a high-strength steel mesh 202. The PVC layer 201 is made by injection molding with a mold, and the high-strength steel mesh 202 is formed by cold punching a high-strength steel plate in the area opposite to the panel area 102. After the PVC layer 201 and the high-strength steel mesh 202 are adhesively compounded, the polygonal reinforcing rib 2 can be formed.

[0058] Preferably, the thickness of the polygonal reinforcing rib 2 is equal to the groove depth of the stamping depression 103. Here, the groove depth of the stamping depression 103 is 10 mm - 15 mm, the layer thickness of the high-strength steel mesh 202 is 2 mm - 5 mm,

[0059] and the layer thickness of the PVC layer 201 is 8 mm - 10 mm. Optionally, the groove width of the stamping depression 103 is 7 mm - 10 mm. The thickness of the color steel plate is 0.3 mm - 1.2 mm.

[0060] In the assembly stage, the present invention relies on its own polygonal structure to realize the connection of two adjacent environmentally friendly wear-resistant polyurethane color steel plates. Specifically, refer to Figures 1-6 as shown: First, during assembly, one end of the polyurethane layer 3 should protrude from the multi-convex color steel plate 1 to form a plug end, and the other end of the polyurethane layer 3 is recessed in the multi-convex color steel plate 1 to form a socket end. The plug end of one environmentally friendly wear-resistant polyurethane color steel plate is inserted into the socket end of the other environmentally friendly wear-resistant polyurethane color steel plate to form a state where adjacent environmentally friendly wear-resistant polyurethane color steel plates are butted.

[0061] For example Figure 6 in, the two environmentally friendly wear-resistant polyurethane color steel plates are respectively plate a and plate b, then the plug end of plate b is inserted into the socket end of plate a, and this way is used as the preliminary insertion action.

[0062] Preferably, the polygonal structure here is a hexagonal structure. The hexagonal structure can form a honeycomb shape on the surface of the multi-convex color steel plate 1. The stamping recessed parts 103 of a single hexagon on both sides of the multi-convex color steel plate 1 near the plug end and the socket end are both semi-hexagonal grooves (refer to Figure 1 where the hexagonal structures at both the left and right ends are cut, leaving only half of the hexagon), so that two adjacent semi-hexagons here form a Y-shaped groove 1031 (substantially, the Y-shaped groove 1031 belongs to the stamping recessed part 103); when the polygonal reinforcing ridge 2 is inserted into the stamping recessed part 103, one side of the polygonal reinforcing ridge 2 near the plug end fills the Y-shaped groove 1031 of the socket end (refer to Figure 7 one of the polygonal reinforcing ridges 2 on the right), and Y-shaped limit frames 21 are arranged at intervals on one side of the polygonal reinforcing ridge 2 near the plug end, and the Y-shaped limit frames 21 protrude from the multi-convex color steel plate 1. A notch area 22 is provided in the area of the polygonal reinforcing ridge 2 near the socket end opposite to the Y-shaped limit frames 21 (as Figure 5 ). Since the notch area 22 of the polygonal reinforcing ridge 2 cannot fill the Y-shaped groove 1031 opposite to it, during assembly, the Y-shaped limit frame 21 of one environmentally friendly wear-resistant polyurethane color steel plate is inserted into the Y-shaped groove 1031 (this Y-shaped groove 1031 refers to the Y-shaped groove 1031 opposite to the notch area 22 of the polygonal reinforcing ridge 2) of the other environmentally friendly wear-resistant polyurethane color steel plate.

[0063] Therefore, the environmentally friendly wear-resistant polyurethane color steel plate provided by the embodiment of the present invention can initially lock two environmentally friendly wear-resistant polyurethane color steel plates by using the Y-shaped groove 1031 and the Y-shaped limit frames 21 through the structural characteristics of the hexagonal structure. After initial locking, a pneumatic nail is further used for reinforcement (as Figure 6 ).

[0064] Such as Figure 8 and Figure 9 shown, preferably, the width of the bottom of the stamping recessed part 103 is equal to or greater than the width of the notch. When the width of the bottom of the stamping recessed part 103 is equal to the width of the notch, the polygonal reinforcing ridge 2 can be more conveniently inserted into the stamping recessed part 103. When the width of the bottom of the stamping recessed part 103 is greater than the width of the notch, the polygonal reinforcing ridge 2 can achieve self-locking after being inserted into the stamping recessed part 103.

[0065] Combined with Figure 4 and Figure 10As shown in the figure, the above-mentioned polyurethane layer 3 includes a high-density polyurethane layer 32, transition regions 34 on both sides of the high-density polyurethane layer 32, and a low-density polyurethane layer 31 on the side of the transition region 34 away from the high-density polyurethane layer 32, realizing a density gradient change of the polyurethane. The high-density polyurethane layer 32 serves as the main heat-insulating layer. The low-density polyurethane layer 31 takes advantage of its lower density. On the one hand, it serves as an energy absorption layer, dissipating impact energy through compression deformation to improve the impact resistance of this environmentally friendly wear-resistant polyurethane color steel plate. On the other hand, since its density is lower than that of the used polyurethane raw material, it can reflect the environmental protection principle.

[0066] Preferably, the gradient density change of the above-mentioned polyurethane layer 3 can rely on the segmented injection foaming method: injecting polyurethane prepolymers with different formulas (adjusting the proportion of the foaming agent to control the density) into the mold in sequence, and realizing the interlayer fusion by using the time difference.

[0067] For the environmentally friendly wear-resistant polyurethane color steel plate provided by the embodiment of the present invention, under the combined action of the honeycomb-shaped convex part 101 and the polyurethane layer 3, the external pressure is first dispersed by the honeycomb unit side walls, and uniformly transmitted to the high-density polyurethane layer 32 through the low-density polyurethane layer 31 and the transition region 34. The system works in coordination, and the impact resistance is greatly improved.

[0068] Preferably, a corrugated reinforcing skeleton 33 is embedded in the low-density polyurethane layer 31. The corrugated reinforcing skeleton 33 is a perforated hollow frame. The corrugated reinforcing skeleton 33 forms an "arch bridge effect" in the low-density polyurethane layer 31, further converting the point load into a surface load, and further improving its impact resistance and compressive resistance. In addition, the corrugated reinforcing skeleton 33 and the polyurethane are impregnated and cured to form a mechanical interlock, restricting the lateral deformation of the core layer. The corrugated structure of the corrugated reinforcing skeleton 33 can directionally guide the internal stress transmission, avoiding local overload of the polyurethane layer 3.

[0069] Furthermore, the gradient density layer avoids the repeated compression and rebound failure of traditional homogeneous foams. Combining with the deformation constraint of the corrugated reinforcing skeleton 33, the service life of the structure is extended (the estimated number of cyclic wear times is increased by 2-3 times).

[0070] Preferably, the corrugated reinforcing skeleton 33 is a galvanized steel strip.

[0071] Optionally, the density of the high-density polyurethane layer 32 is 40-48 kg / m³.

[0072] Optionally, the density of the low-density polyurethane layer 31 is 30-35 kg / m³.

[0073] Optionally, the density of the transition region 34 is 35-40 kg / m³.

[0074] Embodiment 2

[0075] AsFigure 11 , the difference between this embodiment and the first embodiment is that the polygonal structure is a quadrilateral structure, and the stamping recessed parts 103 of the single quadrilateral on both sides of the multi-convex color steel plate 1 near the plug end and the socket end are both complete quadrilateral grooves; one end of the polygonal reinforcing ridge 2 near the plug end protrudes from the multi-convex color steel plate 1 by at least one grid, and one end of the polygonal reinforcing ridge 2 near the socket end is recessed into the multi-convex color steel plate 1 by at least one grid. One grid that protrudes from one environmentally friendly wear-resistant polyurethane color steel plate is embedded into one grid that is recessed in the other environmentally friendly wear-resistant polyurethane color steel plate, so that the quadrilateral 102 of one environmentally friendly wear-resistant polyurethane color steel plate restricts the polygonal reinforcing ridge 2 of the quadrilateral of the other environmentally friendly wear-resistant polyurethane color steel plate, and the initial fitting effect of the two environmentally friendly wear-resistant polyurethane color steel plates can also be achieved.

[0076] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0077] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An environmentally friendly wear-resistant polyurethane color steel plate, characterized in that, Including: A multi-convex color steel plate (1), the multi-convex color steel plate (1) is a color steel plate formed by rolling or stamping a planar color steel plate with convex portions (101), and the convex portions (101) enclose a closed polygonal structure, and the polygonal structures are arranged continuously in a matrix, and two adjacent polygonal structures share side walls; And A polyurethane layer (3), the polyurethane layer (3) is sandwiched between two multi-convex color steel plates (1), and the convex portions (101) are located on the side of the multi-convex color steel plate (1) away from the polyurethane layer (3) to withstand external wear; One end of the polyurethane layer (3) protrudes from the multi-convex color steel plate (1) to form a plug end, and the other end of the polyurethane layer (3) is recessed in the multi-convex color steel plate (1) to form a socket end; The polygonal structure is a hexagonal structure, and the hexagonal structure can form a honeycomb shape on the surface of the multi-convex color steel plate (1); The stamping recessed portions (103) of a single hexagon on both sides of the multi-convex color steel plate (1) near the plug end and the socket end are both semi-hexagonal grooves, and two adjacent semi-hexagons form a Y-shaped groove (1031); The color steel plate in the area inside the polygonal structure forms a panel area (102), and the convex portion (101) forms a stamping recessed portion (103) on the side close to the polyurethane layer (3); It also includes a polygonal reinforcing ridge (2), the polygonal reinforcing ridge (2) is embedded in the stamping recessed portion (103), and the polygonal reinforcing ridge (2) is used to support the convex portion (101) and strengthen the strength of the convex portion (101); The thickness of the polygonal reinforcing ridge (2) is equal to the depth of the groove of the stamping recessed portion (103); One side of the polygonal reinforcing ridge (2) near the plug end fills the Y-shaped groove (1031) of the socket end, and a Y-shaped limiting frame (21) is arranged at intervals on the side of the polygonal reinforcing ridge (2) near the plug end, and the Y-shaped limiting frame (21) protrudes from the multi-convex color steel plate (1), and a notch area (22) is provided in the area of the side of the polygonal reinforcing ridge (2) near the socket end opposite to the Y-shaped limiting frame (21); The Y-shaped limiting frame (21) of one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in the Y-shaped groove (1031) of the other environmentally friendly wear-resistant polyurethane color steel plate.

2. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 1, characterized in that: The outer surface of the convex portion (101) is roll-coated with a wear-resistant coating (104), and the wear-resistant coating (104) is a fluorocarbon coating or a ceramic coating.

3. An environmentally friendly wear-resistant polyurethane color steel plate according to claim 1, characterized in that: The depth of the groove of the stamping recessed portion (103) is 10 mm - 15 mm; The thickness of the color steel plate is 0.3 - 1.2 mm.

4. An environmentally friendly wear-resistant polyurethane color steel plate according to claim 3, characterized in that: The width of the bottom of the groove of the stamping recessed portion (103) is equal to or greater than the width of the groove opening.

5. An environmentally friendly wear-resistant polyurethane color steel plate according to claim 4, characterized in that: The polyurethane layer (3) includes a high-density polyurethane layer (32), transition regions (34) on both sides of the high-density polyurethane layer (32), and a low-density polyurethane layer (31) on the side of the transition region (34) away from the high-density polyurethane layer (32); The density of the high-density polyurethane layer (32) is 40 - 48 kg / m³; The density of the low-density polyurethane layer (31) is 30 - 35 kg / m³; The density of the transition region (34) is 35 - 40 kg / m³.

6. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 5, characterized in that: A corrugated reinforcement skeleton (33) is embedded in the low-density polyurethane layer (31), and the corrugated reinforcement skeleton (33) is a perforated hollow frame.

7. An environmentally friendly wear-resistant polyurethane color steel plate, characterized in that, Including: A multi-convex color steel plate (1), the multi-convex color steel plate (1) is a color steel plate formed by rolling or stamping a flat color steel plate and having a convex part (101), the convex parts (101) enclose a closed polygonal structure, and the polygonal structures are arranged continuously in a matrix, and adjacent two polygonal structures share side walls; And A polyurethane layer (3), the polyurethane layer (3) is sandwiched between two multi-convex color steel plates (1), and the convex part (101) is located on the side of the multi-convex color steel plate (1) away from the polyurethane layer (3) to withstand external wear; One end of the polyurethane layer (3) protrudes from the multi-convex color steel plate (1) to form a plug end, and the other end of the polyurethane layer (3) is recessed in the multi-convex color steel plate (1) to form a socket end; The polygonal structure is a quadrilateral structure; The stamping recesses (103) of a single quadrilateral on both sides of the multi-convex color steel plate (1) near the plug end and the socket end are both complete quadrilateral grooves; The color steel plate in the area within the polygonal structure forms a panel area (102), and the convex part (101) forms a stamping recess (103) on the side close to the polyurethane layer (3); It also includes a polygonal reinforcing ridge (2), the polygonal reinforcing ridge (2) is embedded in the stamping recess (103), and the polygonal reinforcing ridge (2) is used to support the convex part (101) and strengthen the strength of the convex part (101); The thickness of the polygonal reinforcing ridge (2) is equal to the groove depth of the stamping recess (103); One end of the polygonal reinforcing ridge (2) near the plug end protrudes from the multi-convex color steel plate (1) by at least one grid, and one end of the polygonal reinforcing ridge (2) near the socket end is recessed in the multi-convex color steel plate (1) by at least one grid; One grid protruding from one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in one grid recessed in the other environmentally friendly wear-resistant polyurethane color steel plate.

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