Environment-friendly wear-resistant polyurethane color steel plate

Abstract

The invention discloses an environment-friendly wear-resistant polyurethane color steel plate, and relates to the technical field of polyurethane color steel plates. The environment-friendly wear-resistant polyurethane color steel plate comprises a multi-convex color steel plate, the multi-convex color steel plate is a color steel plate which is formed by rolling or stamping a plane color steel plate and is provided with convex parts, the convex parts define a closed polygonal structure, and the polygonal structure is continuously arranged in a matrix mode; two adjacent polygonal structures share a side wall; the polyurethane plate is clamped between the two layers of multi-convex color steel plates, and the convex parts are located on the sides, away from the polyurethane layer, of the multi-convex color steel plates so as to bear external abrasion; according to the environment-friendly wear-resistant polyurethane color steel plate, the multi-convex color steel plate is arranged, the multi-convex color steel plate is a color steel plate which is formed by rolling or stamping a planar color steel plate and is provided with convex parts, continuous compression-resistant grids are formed, then external loads can be dispersed by reducing the contact area of the outer surface of the color steel plate, and frictional wear is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane color steel plates, in particular to an environmentally friendly 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 insulation function of buildings built with color steel plates; usually, the polyurethane insulation board is inserted into the frame-type color steel plate, and then a colloid is applied between the color steel plate and the polyurethane sandwich panel to achieve connection.

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

[0004] However, the outer surface of the color steel plate in the prior art is subjected to a lot of external wear and tear indoors and outdoors, which can easily lead to scratches, breakages, and wear marks, and the service life will be reduced accordingly. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly, wear-resistant polyurethane color steel plate, which solves the problem that the outer surface of the color steel plate in the prior art is subjected to a large amount of external wear indoors and outdoors, which easily leads to scratches, breakages, and wear marks, and the service life is also reduced.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an environmentally friendly wear-resistant polyurethane color steel plate, comprising: Multi-convex color steel plate, wherein the multi-convex color steel plate is a color steel plate with convex parts formed by rolling or stamping a flat color steel plate, wherein the convex parts enclose a closed polygonal structure, and the polygonal structures are continuously arranged in a matrix, and two adjacent polygonal structures share a side wall; and The polyurethane layer is sandwiched between two layers of multi-convex color steel plates, and the convex part is located on the side of the multi-convex color steel plate away from the polyurethane layer to withstand external wear.

[0007] Furthermore, the outer surface of the raised portion is roll-coated with a wear-resistant coating, and the wear-resistant coating is a fluorocarbon coating or a ceramic coating.

[0008] Furthermore, the color steel plate in the inner area of ​​the polygonal structure forms a panel area, and the convex part forms a stamping depression on the side close to the polyurethane layer; It also includes a polygonal reinforcing ridge, which is embedded in the stamping recessed portion and is used to support the raised portion and enhance the strength of the raised portion; The thickness of the polygonal reinforcing ridge is equal to the groove depth of the punched recessed portion.

[0009] Furthermore, the groove depth of the stamping recessed portion is 10mm-15mm; The thickness of the color steel plate is 0.3mm-1.2mm.

[0010] 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, and 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 connected.

[0011] Furthermore, the polygonal structure is a hexagonal structure, and the hexagonal structure can form the surface of the multi-convex color steel plate into a honeycomb shape; The single hexagonal stamped recessed portions 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; The side of the polygonal reinforcing ridge close to the plug end fills the Y-shaped groove of the socket end, and a Y-shaped limit frame is arranged at intervals on the side of the polygonal reinforcing ridge close to the plug end, and the Y-shaped limit frame protrudes from the multi-convex color steel plate, and a notch area is arranged on the side of the polygonal reinforcing ridge close to the socket end and opposite to the Y-shaped limit frame; The Y-shaped limit 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. Further, the polygonal structure is a quadrilateral structure; The single quadrilateral stamped recessed portions on both sides of the multi-convex color steel plate close to the plug end and the socket end are all complete quadrilateral grooves; 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; A protruding grid of one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in a recessed grid of another environmentally friendly wear-resistant polyurethane color steel plate.

[0012] Furthermore, the width of the bottom of the stamping recess is equal to or greater than the width of the slot.

[0013] Furthermore, the polyurethane layer includes a high-density polyurethane layer, transition regions located on both sides of the high-density polyurethane layer, and a low-density polyurethane layer located on a side of the transition region away from the high-density polyurethane layer; The density of the high-density polyurethane layer is 40-48 kg / m³; The density of the low-density polyurethane layer is 30-35kg / m³; The density of the transition zone is 35-40 kg / m³.

[0014] Furthermore, a corrugated reinforcement frame is embedded in the low-density polyurethane layer, and the corrugated reinforcement frame is a hollow frame with holes.

[0015] The present invention has the following beneficial effects: (1) The environmentally friendly wear-resistant polyurethane color steel plate is provided with a multi-convex color steel plate. The multi-convex color steel plate is a color steel plate with convex parts formed by rolling or stamping a flat color steel plate. The convex parts are enclosed into a closed polygonal structure, and the polygonal structures are arranged continuously 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, and then the external load can be dispersed by reducing the contact area of ​​the outer surface of the color steel plate (reduced by about 40%-60%), thereby reducing friction and wear.

[0016] (2) The environmentally friendly wear-resistant polyurethane color steel plate is provided with a polygonal reinforcing ridge, which is embedded in the stamped recessed portion. Thus, the polygonal reinforcing ridge can support the raised portion 1 and strengthen the strength of the raised portion on the one hand, and can also improve the strength of the convex color steel plate as a whole on the other hand.

[0017] (3) The environmentally friendly wear-resistant polyurethane color steel plate is provided with a polyurethane layer with a density gradient change. Under the joint action of the honeycomb-shaped protrusions and the polyurethane layer, the external pressure is first dispersed by the side walls of the honeycomb unit, and then evenly transmitted to the high-density polyurethane layer through the low-density polyurethane layer and the transition area. The system works in coordination and the impact resistance is greatly improved.

[0018] (4) The environmentally friendly wear-resistant polyurethane color steel plate uses the structural characteristics of the polygonal structure to initially lock two environmentally friendly wear-resistant polyurethane color steel plates. After the initial locking, air gun nails are used to further reinforce them, which is more convenient.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall diagram of the first embodiment of the present invention; Figure 2 It is a partial view of the multi-convex color steel plate in the first embodiment of the present invention; Figure 3 A partial view of a multi-convex color steel plate from another perspective in the first embodiment of the present invention; Figure 4 This is an exploded view of the first embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a polygonal reinforcing ridge in Embodiment 1 of the present invention; Figure 6 This is an assembly diagram of plate a and plate b in embodiment 1 of the present invention; Figure 7 This is a schematic diagram of two multi-convex color steel plates with polygonal reinforcing ridges before assembly in Example 1 of the present invention; Figure 8 This is a schematic diagram of the groove bottom and groove top of the punched recessed portion having the same width in the first embodiment of the present invention; Fig. 9 It is a schematic diagram of a situation in which the width of the groove bottom of the punched recessed portion is greater than the width of the groove top in the first embodiment of the present invention; Fig.10 A schematic diagram of a corrugated reinforced skeleton of the present invention; Fig.11 This is a schematic diagram of two multi-convex color steel plates with polygonal reinforcing ridges before assembly according to Example 2 of the present invention.

[0021] In the figure, 1. Multi-convex color steel plate; 101. Raised part; 102. Panel area; 103. Stamping recessed part; 1031. Y-shaped groove; 104. Wear-resistant coating; 2. Polygonal reinforcing ridge; 201. PVC layer; 202. High-strength steel mesh; 21. Y-shaped limit frame; 22. Notch area; 3. Polyurethane layer; 31. Low-density polyurethane layer; 32. High-density polyurethane layer; 33. Corrugated reinforced skeleton; 34. Transition area. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] 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.

[0024] According to the following Figure 1-Figure 11 The environmentally friendly wear-resistant polyurethane color steel plate provided by an embodiment of the present invention is described.

[0025] Embodiment 1: See also Figure 1-Figure 3As 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.

[0026] 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.

[0027] 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.

[0028] Optionally, the wear-resistant coating 104 is a fluorocarbon coating or a ceramic coating.

[0029] In the process of making the multi-convex color steel plate 1, since the convex part 101 is formed by stamping or rolling, a stamping recessed part 103 is formed on the side close to the polyurethane layer 3. Since the color steel plate in the prior art is thin and easy to deform, in order to improve the compressive strength of the convex part 101, a polygonal reinforcing ridge 2 is also provided. Figure 4 The polygonal reinforcing ridge 2 is embedded in the stamped recessed portion 103 , so that the polygonal reinforcing ridge 2 can support the raised portion 101 and strengthen the strength of the raised portion 101 on the one hand, and can also improve the strength of the multi-convex color steel plate 1 as a whole on the other hand.

[0030] like Figure 5Preferably, the polygonal reinforcing ridge 2 is essentially composed of a two-layer structure, wherein the side close to the polyurethane layer 3 is a PVC layer 201, and the side away from the polyurethane layer 3 is a high-strength steel mesh 202. The PVC layer 201 is made by mold injection molding, and the high-strength steel mesh 202 is formed by cold punching a rigid steel plate in an area opposite to the panel area 102. The polygonal reinforcing ridge 2 can be formed by gluing the PVC layer 201 and the high-strength steel mesh 202 together.

[0031] Preferably, the thickness of the polygonal reinforcing ridge 2 is equal to the groove depth of the punched recessed portion 103. Here, the groove depth of the punched recessed portion 103 is 10 mm-15 mm, and the layer thickness of the high-strength steel mesh 202 is 2 mm-5 mm. The thickness of the PVC layer 201 is 8 mm to 10 mm. Optionally, the width of the punched recessed portion 103 is 7 mm to 10 mm. The thickness of the color steel plate is 0.3 mm to 1.2 mm.

[0032] During the assembly stage, the present invention relies on its own polygonal structure to achieve the connection of two adjacent environmentally friendly wear-resistant polyurethane color steel plates. Figure 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 should be recessed in the multi-convex color steel plate 1 to form a socket end, in which the plug end of one environmentally friendly wear-resistant polyurethane color steel plate is inserted into the socket end of another environmentally friendly wear-resistant polyurethane color steel plate to form a state where adjacent environmentally friendly wear-resistant polyurethane color steel plates are butt-jointed.

[0033] For example Figure 6 In the method, the two environmentally friendly wear-resistant polyurethane color steel plates are plate a and plate b respectively, and the plug end of plate b is inserted into the socket end of plate a, and this method is used as the initial insertion action.

[0034] Preferably, the polygonal structure here is a hexagonal structure, which can form a honeycomb shape on the surface of the multi-convex color steel plate 1, and the single hexagonal stamping recessed portions 103 on both sides of the multi-convex color steel plate 1 close to the plug end and the socket end are all semi-hexagonal grooves (refer to Figure 1 The hexagonal structures at the left and right ends are cut, leaving only half of the hexagons), so that the two adjacent half hexagons here form a Y-shaped groove 1031 (in fact, the Y-shaped groove 1031 belongs to the stamping recessed portion 103); when the polygonal reinforcing ridge 2 is embedded in the stamping recessed portion 103, the side of the polygonal reinforcing ridge 2 close to the plug end fills the Y-shaped groove 1031 at the socket end (refer to Figure 7 A polygonal reinforcing ridge 2 on the right side), and a Y-shaped limit frame 21 is arranged at intervals on one side of the polygonal reinforcing ridge 2 close to the plug end, and the Y-shaped limit frame 21 protrudes from the multi-convex color steel plate 1, and a notch area 22 (such 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 embedded in the Y-shaped groove 1031 of another environmentally friendly wear-resistant polyurethane color steel plate (this Y-shaped groove 1031 refers to the Y-shaped groove 1031 opposite to the notch area 22 of the polygonal reinforcing ridge 2).

[0035] Therefore, the environmentally friendly wear-resistant polyurethane color steel plate provided in the embodiment of the present invention can use the Y-shaped groove 1031 and the Y-shaped limit frame 21 to initially lock the two environmentally friendly wear-resistant polyurethane color steel plates through the structural characteristics of the hexagonal structure itself, and then use air gun nails to further reinforce them after the initial locking (such as Figure 6 ).

[0036] like Figure 8 and Fig. 9 As shown, preferably, the bottom width of the stamping recess 103 is equal to or greater than the slot width. When the bottom width of the stamping recess 103 is equal to the slot width, the polygonal reinforcing ridge 2 can be more conveniently embedded in the stamping recess 103. When the bottom width of the stamping recess 103 is greater than the slot width, the polygonal reinforcing ridge 2 can achieve self-locking after being embedded in the stamping recess 103.

[0037] Combination Figure 4 and Fig.10 As shown, the polyurethane layer 3 mentioned above includes a high-density polyurethane layer 32, a transition area 34 located on both sides of the high-density polyurethane layer 32, and a low-density polyurethane layer 31 located on the side of the transition area 34 away from the high-density polyurethane layer 32, so as to realize a density gradient change of the polyurethane. The high-density polyurethane layer 32 serves as the main thermal insulation layer, and the low-density polyurethane layer 31 takes advantage of its own low density. On the one hand, it serves as an energy absorption layer to dissipate impact energy through compression deformation, thereby improving the impact resistance of the environmentally friendly wear-resistant polyurethane color steel plate. On the other hand, since its density is less than that of the polyurethane raw material used, it can reflect the principle of environmental protection.

[0038] Preferably, the gradient density change of the polyurethane layer 3 can be achieved by means of a segmented injection foaming method: polyurethane prepolymers of different formulations are sequentially injected into the mold (the proportion of the foaming agent is adjusted to control the density), and the interlayer fusion is achieved by using the time difference.

[0039] The environmentally friendly wear-resistant polyurethane color steel plate provided by the embodiment of the present invention, under the joint action of the honeycomb-shaped raised portion 101 and the polyurethane layer 3, the external pressure is first dispersed by the side walls of the honeycomb unit, and is evenly transmitted to the high-density polyurethane layer 32 through the low-density polyurethane layer 31 and the transition area 34. The systems work in coordination and the impact resistance is greatly improved.

[0040] Preferably, a corrugated reinforcement skeleton 33 is embedded in the low-density polyurethane layer 31. The corrugated reinforcement skeleton 33 is a hollow frame with holes. The corrugated reinforcement skeleton 33 forms an "arch bridge effect" in the low-density polyurethane layer 31, further converting point loads into surface loads, and further improving its impact resistance and compression resistance. In addition, the corrugated reinforcement skeleton 33 and the polyurethane are impregnated and cured to form a mechanical interlocking, which limits the lateral deformation of the core layer. The corrugated structure of the corrugated reinforcement skeleton 33 can directionally guide the internal stress transfer to avoid local overload of the polyurethane layer 3.

[0041] Furthermore, the gradient density layer avoids the repeated compression and rebound failure of traditional homogeneous foam, and combined with the deformation constraint of the corrugated reinforcement skeleton 33, the life of the structure is extended (the estimated number of cyclic wear is increased by 2-3 times).

[0042] Preferably, the corrugated reinforcement frame 33 is a galvanized steel strip.

[0043] Optionally, the density of the high-density polyurethane layer 32 is 40-48 kg / m³.

[0044] Optionally, the density of the low-density polyurethane layer 31 is 30-35 kg / m³.

[0045] Optionally, the density of the transition region 34 is 35-40 kg / m³.

[0046] Embodiment 2 like Fig.11 The difference between this embodiment and the first embodiment is that the polygonal structure is a quadrilateral structure, and the single quadrilateral stamping recessed portions 103 on both sides of the multi-convex color steel plate 1 close to the plug end and the socket end are all complete quadrilateral grooves; the end of the polygonal reinforcing ridge 2 close to the plug end protrudes from the multi-convex color steel plate 1 by at least one grid, and the end of the polygonal reinforcing ridge 2 close to the socket end is recessed in the multi-convex color steel plate 1 by at least one grid, and the protruding grid of one environmentally friendly wear-resistant polyurethane color steel plate is embedded in the recessed grid of 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 quadrilateral polygonal reinforcing ridge 2 of the other environmentally friendly wear-resistant polyurethane color steel plate, and the effect of preliminary embedding of the two environmentally friendly wear-resistant polyurethane color steel plates can also be achieved.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. 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 variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An environmentally friendly wear-resistant polyurethane color steel plate, characterized in that: include: A multi-convex color steel plate (1), wherein the multi-convex color steel plate (1) is a color steel plate having a convex portion (101) formed by rolling or stamping a flat color steel plate, wherein the convex portion (101) encloses a closed polygonal structure, and the polygonal structures are continuously arranged in a matrix, and two adjacent polygonal structures share a side wall; as well as The polyurethane layer (3) is sandwiched between two layers of multi-convex color steel plates (1), and the convex portion (101) is located on a side of the multi-convex color steel plate (1) away from the polyurethane layer (3) to withstand external wear.

2. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 1, characterized in that: The outer surface of the raised 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. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 2 is characterized by: The colored steel plate in the area within the polygonal structure forms a panel area (102), and the convex portion (101) forms a stamped recessed portion (103) on a side close to the polyurethane layer (3); It also comprises a polygonal reinforcing ridge (2), wherein the polygonal reinforcing ridge (2) is embedded in the stamping recessed portion (103), and the polygonal reinforcing ridge (2) is used to support the raised portion (101) and to enhance the strength of the raised portion (101); The thickness of the polygonal reinforcing ridge (2) is equal to the groove depth of the stamped recessed portion (103).

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

5. An environmentally friendly wear-resistant polyurethane color steel plate according to any one of claims 1 to 4, characterized in that: 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, wherein 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 to form a state in which adjacent environmentally friendly wear-resistant polyurethane color steel plates are butted against each other.

6. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 5, characterized in that: The polygonal structure is a hexagonal structure, and the hexagonal structure can form the surface of the multi-convex color steel plate (1) into a honeycomb shape; The single hexagonal stamped recessed portions (103) on both sides of the multi-convex color steel plate (1) close to the plug end and the socket end are all semi-hexagonal grooves, and two adjacent semi-hexagons form a Y-shaped groove (1031); The side of the polygonal reinforcing ridge (2) close to the plug end fills the Y-shaped groove (1031) of the socket end, and a Y-shaped limit frame (21) is arranged at intervals on the side of the polygonal reinforcing ridge (2) close to the plug end, and the Y-shaped limit frame (21) protrudes from the multi-convex color steel plate (1), and a notch area (22) is provided in the area opposite to the Y-shaped limit frame (21) on the side of the polygonal reinforcing ridge (2) close to the socket end; 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 another environmentally friendly wear-resistant polyurethane color steel plate.

7. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 5, characterized in that: The polygonal structure is a quadrilateral structure; The single quadrilateral stamped recessed portions (103) on both sides of the multi-convex color steel plate (1) close to the plug end and the socket end are all complete quadrilateral grooves; An end of the polygonal reinforcing ridge (2) close to the plug end protrudes from the multi-convex color steel plate (1) by at least one grid, and an end of the polygonal reinforcing ridge (2) close to the socket end is recessed in the multi-convex color steel plate (1) by at least one grid; A protruding grid of one of the environmentally friendly wear-resistant polyurethane color steel plates is embedded in a recessed grid of another environmentally friendly wear-resistant polyurethane color steel plate.

8. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 6 or 7, characterized in that: The width of the bottom of the punched recessed portion (103) is equal to or greater than the width of the slot opening.

9. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 8, characterized in that: The polyurethane layer (3) comprises a high-density polyurethane layer (32), transition regions (34) located on both sides of the high-density polyurethane layer (32), and a low-density polyurethane layer (31) located on a 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.

10. The environmentally friendly wear-resistant polyurethane color steel plate according to claim 9, characterized in that: A corrugated reinforcement frame (33) is embedded in the low-density polyurethane layer (31), and the corrugated reinforcement frame (33) is a hollow frame with holes.

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