High-strength sandwich composite board

Abstract

The utility model discloses a high strength sandwich composite board relates to building supplies technical field, including first reinforcing plate, second reinforcing plate, light filling material, a plurality of reinforcing keel, the first reinforcing plate is equipped with a plurality of continuously fluctuating square wave, the second reinforcing plate is equipped with a plurality of continuously fluctuating ripples or square wave, and the light filling material is equipped with a plurality of reinforcing keel. The light filling material and the reinforcing keels are arranged between the first reinforcing plate and the second reinforcing plate, and the reinforcing keels are arranged in the light filling material at intervals. The high-strength sandwich composite board provided by the utility model is high in strength, low in design cost, simple in structure, easy to maintain and repair and long in service life, and is not easy to break when being transferred and mounted on an outdoor wall surface of a building.

Description

TECHNICAL FIELD

[0001] The utility model relates to building material technical field especially relates to a high strength sandwich composite board. BACKGROUND

[0002] Sandwich composite board is a common building material, usually by two layers of metal plate and the middle rock wool. This sandwich composite board on one hand has the problem of relatively low strength, on the other hand is used this sandwich composite board to do building outdoor wall, transport and installation easy to break metal plate, there is obvious trace, this sandwich composite board has the problems such as higher price, maintenance and repair difficulty. SUMMARY

[0003] In view of the above-mentioned deficiencies existing at present, the utility model provides a high strength sandwich composite board, high strength, not easy to produce fold, low design cost, simple structure, easy to maintain and repair, long service life.

[0004] To achieve the above object, the embodiment of the utility model adopts the following technical scheme:

[0005] A kind of high strength sandwich composite board, including first reinforcing plate, second reinforcing plate, light filling material, several reinforcing keels, the first reinforcing plate is equipped with several continuous undulations square wave, the second reinforcing plate is equipped with several continuous undulations corrugation or square wave, the light filling material and reinforcing keel are all set between first reinforcing plate, second reinforcing plate, several reinforcing keels are spaced apart and set in light filling material.

[0006] According to an aspect of the utility model, the length of a square wave is 50mm, and the undulation amplitude is 1mm. The length of a corrugation is 20mm, and the undulation amplitude is 1.5mm.

[0007] According to an aspect of the utility model, the first reinforcing plate and the second reinforcing plate are both metal plates. The reinforcing keel is a magnesium plate. The reinforcing keel has one of the shapes of rectangle, U shape, Z shape, trapezoid, cylinder and triangle. The light filling material uses thermal insulation cotton or foaming agent.

[0008] According to an aspect of the utility model, the first reinforcing plate is a square wave plate. The second reinforcing plate is a corrugated plate or a square wave plate.

[0009] According to an aspect of the utility model, one end of the square wave plate, the light filling material and the corrugated plate forms a butt joint groove. The other end of the square wave plate, the light filling material and the corrugated plate forms a butt joint protrusion. The butt joint protrusion is used for butt joint with the butt joint groove of another high strength sandwich composite board.

[0010] According to one aspect of the present invention, the square wave plate, the lightweight filling material, and one end of the square wave plate form a first concave-convex interface, and the other end of the square wave plate, the lightweight filling material, and the square wave plate form a second concave-convex interface, the second concave-convex interface being used to dock with the first concave-convex interface of another high-strength sandwich composite plate.

[0011] According to one aspect of the present invention, one end of the corrugated plate is provided with a mating step, and the other end of the corrugated plate is provided with a mating groove, the mating groove being used to mate with the mating step of another high-strength sandwich composite plate.

[0012] According to one aspect of this utility model, after the mating protrusion and the mating groove are mated, a mating gap is left between them, and after the mating step and the mating slot are mated, a mating gap is also left between them, and the distance of the mating gap is 2mm.

[0013] According to one aspect of the present invention, after the docking step and the docking groove are docked, a docking cavity is left between them, and the docking cavity is in the shape of a right trapezoid.

[0014] According to one aspect of this utility model, the unfolded lengths of the square wave plate and the corrugated plate are 1070mm and 1200mm respectively, the distance between them is 50mm, the length of the docking step is 47mm to 67mm, and the depth of the docking groove is 49mm and the width is 18mm.

[0015] The advantages of this utility model are: by setting square wave plates and corrugated plates, and adding several reinforcing keels in the lightweight filling material, the composite plate has higher strength, is not prone to creases, has low design cost, simple structure, is easy to maintain and repair, and has a long service life. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0018] Figure 2 This is a partial structural diagram of the first embodiment of the present invention during docking;

[0019] Figure 3 This is a schematic diagram of the square wave plate described in Embodiment 1 of this utility model;

[0020] Figure 4This is a schematic diagram of the corrugated plate described in Embodiment 1 of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0022] Figure 6 This is a partial structural diagram of the second embodiment of the present invention during docking;

[0023] Figure 7 This is a schematic diagram of the square wave plate described in Embodiment 2 of this utility model;

[0024] Figure 8 This is a schematic diagram of the corrugated plate described in Embodiment 2 of this utility model;

[0025] Figure 9 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0026] Figure 10 This is a partial structural diagram of the third embodiment of the present invention during docking;

[0027] Figure 11 This is a schematic diagram of the square wave plate described in Embodiment 3 of this utility model.

[0028] The names corresponding to the serial numbers in the diagram are as follows:

[0029] 1. Square wave plate; 2. Corrugated plate; 21. Second left step; 3. Lightweight filling material; 4. Reinforcing keel; 5. Butt groove; 6. Butt protrusion; 7. Butt gap; 8. Butt step; 81. First step; 82. Second step; 9. Butt groove; 10. Butt cavity; 11. First left step; 12. Hook-shaped part; 13. First concave-convex interface; 14. Second concave-convex interface. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inner", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] Example 1

[0032] like Figure 1 - Figure 4 As shown, a high-strength sandwich composite panel includes a first reinforcing plate, a second reinforcing plate, a lightweight filler material 3, and several reinforcing joists 4. The first reinforcing plate is a square-wave plate 1, and the second reinforcing plate is a corrugated plate 2. The square-wave plate 1 has several continuous undulating square waves, and the corrugated plate 2 has several continuous undulating corrugations. The square-wave plate 1 and the corrugated plate 2 ensure structural strength. Both the square-wave plate 1 and the corrugated plate 2 are metal plates, and can be made of steel. The lightweight filler material 3 and the reinforcing joists 4 are disposed between the square-wave plate 1 and the corrugated plate 2. The lightweight filler material 3 is made of insulating cotton or a foaming agent, ensuring the composite panel is lightweight and provides thermal insulation, waterproofing, and moisture resistance. The reinforcing keel 4 is a magnesium plate, and its shape can be rectangular, U-shaped, Z-shaped, trapezoidal, cylindrical, or triangular. The shape of the reinforcing keel 4 can be adjusted according to the actual use. Several reinforcing keels 4 are spaced apart within the lightweight filler material 3, and the reinforcing keels 4 can increase the strength of the sandwich composite panel. By setting square wave plates 1 and corrugated plates 2, and adding several reinforcing keels 4 within the lightweight filler material 3, the composite panel has higher strength, is less prone to creases, has low design cost, simple structure, is easy to maintain and repair, and has a long service life.

[0033] In this embodiment, the length of one square wave of the square wave plate 1 is 50mm and the undulation amplitude is 1mm, and the length of one corrugation of the corrugated plate 2 is 20mm and the undulation amplitude is 1.5mm. The unfolded length of the square wave plate 1 is 1070mm (both ends are half the length of a square wave, i.e., 25mm), and the total length is 1090mm; the unfolded length of the corrugated plate 2 is 1200mm (both ends are half the length of a corrugation, i.e., 10mm, and both ends of the half corrugation are flat plates, i.e., without undulation), and the total length is 1267mm; the distance between the square wave plate 1 and the corrugated plate 2 is 50mm.

[0034] In this embodiment, a mating groove 5 is formed at one end of the square wave plate 1, the lightweight filler material 3, and the corrugated plate 2, and a mating protrusion 6 is formed at the other end. The mating protrusion 6 is used to mate with the mating groove 5 of another high-strength sandwich composite plate. After the mating protrusion 6 and the mating groove 5 are mated, a 2mm mating gap 7 is left between them. The mating groove 5 is a right-angled trapezoidal groove, that is, one side of the opening is deeper than the other side, or in other words, the whole is a U-shaped groove. The mating protrusion 6 is block-shaped. The structural shapes of the mating groove 5 and the mating protrusion 6 are adapted to each other.

[0035] In this embodiment, one end of the corrugated plate 2 is provided with a mating step 8, and the other end of the corrugated plate 2 is provided with a mating groove 9. The mating groove 9 is used to mate with the mating step 8 of another high-strength sandwich composite plate. After the mating step 8 and the mating groove 9 are mated, a 2mm mating gap 7 and a right-angled trapezoidal mating cavity 10 are left between them. The mating step 8 and the mating groove 5 of this composite plate are located at the same end (both are on the left end in the attached drawing) and are arranged opposite each other. The mating groove 9 and the mating protrusion 6 are also located at the same end (both are on the right end in the attached drawing) and are arranged opposite each other.

[0036] In this embodiment, the connecting step 8 is integrally formed from a plate through multiple vertical bending. The connecting step 8 includes a first step 81 and a second step 82. The length of the first step 81 is 37mm, and the length of the second step 82 is 30mm, meaning the length of the connecting step 8 is 67mm. The total length of the connecting step 8 and the unfolded portion of the corrugated plate 2 is 1267mm. The depth of the connecting groove 9 is 49mm, and the width is 18mm. The distance between the end face of the connecting groove 9, or the end face of the composite plate with the connecting groove 9, and the end face of the second step 82 of the other composite plate after docking is 20mm. That is, in this embodiment, the two composite plates are connected to form a hidden wide-joint wall panel.

[0037] In this embodiment, a first left step portion 11 is connected to one end of the square wave plate 1 via a rounded transition, and a hook-shaped portion 12 is connected to the other end of the square wave plate 1; a second left step portion 21 is connected to one end of the corrugated plate 2 via a rounded transition at one end of the mating step 8. The first left step portion 11, the lightweight filler material 3, and the second left step portion 21 combine to form a mating groove 5, and the hook-shaped portion 12, the lightweight filler material 3, and the corrugated plate 2 combine at the position of the mating groove 9 to form a mating protrusion 6. The hook-shaped portion 12 is 20 mm long, and the total length of the hook-shaped portion 12 and the unfolded portion of the square wave plate 1 is 1090 mm.

[0038] The beneficial effects of this embodiment are as follows: This composite panel is lightweight, high-strength, and has good thermal insulation performance, reducing the damage rate during transportation, transfer, and installation. The reinforced keel 4 increases the strength of the sandwich composite panel and reduces the wall design cost, with a weight difference not much from similar sandwich composite panels. Production, transportation, and installation processes are accelerated, making it suitable for various building exterior walls. This composite panel exhibits significant advantages in connection reliability, integrity, durable thermal insulation performance, waterproofing, moisture resistance, and energy-saving effects. These advantages not only improve the quality and performance of buildings but also provide strong support for the sustainable development of the construction industry.

[0039] Example 2

[0040] like Figure 5 - Figure 8As shown, a high-strength sandwich composite panel includes a first reinforcing plate, a second reinforcing plate, a lightweight filler material 3, and several reinforcing joists 4. The first reinforcing plate is a square-wave plate 1, and the second reinforcing plate is a corrugated plate 2. The square-wave plate 1 has several continuous undulating square waves, and the corrugated plate 2 has several continuous undulating corrugations. The square-wave plate 1 and the corrugated plate 2 ensure structural strength. Both the square-wave plate 1 and the corrugated plate 2 are metal plates, and can be made of steel. The lightweight filler material 3 and the reinforcing joists 4 are disposed between the square-wave plate 1 and the corrugated plate 2. The lightweight filler material 3 is made of insulating cotton or a foaming agent, ensuring the composite panel is lightweight and provides thermal insulation, waterproofing, and moisture resistance. The reinforcing keel 4 is a magnesium plate, and its shape can be rectangular, U-shaped, Z-shaped, trapezoidal, cylindrical, or triangular. The shape of the reinforcing keel 4 can be adjusted according to the actual use. Several reinforcing keels 4 are spaced apart within the lightweight filler material 3, and the reinforcing keels 4 can increase the strength of the sandwich composite panel. By setting square wave plates 1 and corrugated plates 2, and adding several reinforcing keels 4 within the lightweight filler material 3, the composite panel has higher strength, is less prone to creases, has low design cost, simple structure, is easy to maintain and repair, and has a long service life.

[0041] In this embodiment, the length of one square wave of the square wave plate 1 is 50mm and the undulation amplitude is 1mm, and the length of one corrugation of the corrugated plate 2 is 20mm and the undulation amplitude is 1.5mm. The unfolded length of the square wave plate 1 is 1070mm (both ends are half the length of a square wave, i.e., 25mm), and the total length is 1090mm; the unfolded length of the corrugated plate 2 is 1200mm (both ends are the length of one corrugation, i.e., 20mm, and one corrugation at both ends is a straight plate, i.e., without undulation), and the total length is 1247mm; the distance between the square wave plate 1 and the corrugated plate 2 is 50mm.

[0042] In this embodiment, a mating groove 5 is formed at one end of the square wave plate 1, the lightweight filler material 3, and the corrugated plate 2, and a mating protrusion 6 is formed at the other end. The mating protrusion 6 is used to mate with the mating groove 5 of another high-strength sandwich composite plate. After the mating protrusion 6 and the mating groove 5 are mated, a 2mm mating gap 7 is left between them. The mating groove 5 is a right-angled trapezoidal groove, that is, one side of the opening is deeper than the other side, or in other words, the whole is a U-shaped groove. The mating protrusion 6 is block-shaped. The structural shapes of the mating groove 5 and the mating protrusion 6 are adapted to each other.

[0043] In this embodiment, one end of the corrugated plate 2 is provided with a mating step 8, and the other end of the corrugated plate 2 is provided with a mating groove 9. The mating groove 9 is used to mate with the mating step 8 of another high-strength sandwich composite plate. After the mating step 8 and the mating groove 9 are mated, a 2mm mating gap 7 and a right-angled trapezoidal mating cavity 10 are left between them. The mating step 8 and the mating groove 5 of this composite plate are located at the same end (both are on the left end in the attached drawing) and are arranged opposite each other. The mating groove 9 and the mating protrusion 6 are also located at the same end (both are on the right end in the attached drawing) and are arranged opposite each other.

[0044] In this embodiment, the connecting step 8 is integrally formed from a plate through multiple vertical bending. The connecting step 8 includes a first step 81 and a second step 82. The length of the first step 81 is 37mm, and the length of the second step 82 is 10mm, meaning the length of the connecting step 8 is 47mm. The total length of the connecting step 8 and the unfolded portion of the corrugated plate 2 is 1247mm. The depth of the connecting groove 9 is 49mm, and the width is 18mm. The distance between the end face of the connecting groove 9, or the end face of the composite plate with the connecting groove 9, and the end face of the second step 82 of the other composite plate after contact is 0mm, meaning the two are fitted together. In this embodiment, the two composite plates form a hidden narrow-slit wall panel after contact.

[0045] In this embodiment, a first left step portion 11 is connected to one end of the square wave plate 1 via a rounded transition, and a hook-shaped portion 12 is connected to the other end of the square wave plate 1; a second left step portion 21 is connected to one end of the corrugated plate 2 via a rounded transition at one end of the mating step 8. The first left step portion 11, the lightweight filler material 3, and the second left step portion 21 combine to form a mating groove 5, and the hook-shaped portion 12, the lightweight filler material 3, and the corrugated plate 2 combine at the position of the mating groove 9 to form a mating protrusion 6. The hook-shaped portion 12 is 20 mm long, and the total length of the hook-shaped portion 12 and the unfolded portion of the square wave plate 1 is 1090 mm.

[0046] The beneficial effects of this embodiment are as follows: This composite panel is lightweight, high-strength, and has good thermal insulation performance, reducing the damage rate during transportation, transfer, and installation. The reinforced keel 4 increases the strength of the sandwich composite panel and reduces the wall design cost, with a weight difference not much from similar sandwich composite panels. Production, transportation, and installation processes are accelerated, making it suitable for various building exterior walls. This composite panel exhibits significant advantages in connection reliability, integrity, durable thermal insulation performance, waterproofing, moisture resistance, and energy-saving effects. These advantages not only improve the quality and performance of buildings but also provide strong support for the sustainable development of the construction industry.

[0047] Example 3

[0048] like Figure 9 - Figure 11As shown, a high-strength sandwich composite panel includes a first reinforcing plate, a second reinforcing plate, a lightweight filler material 3, and several reinforcing keels 4. The first reinforcing plate is a square-wave plate 1, and the second reinforcing plate is also a square-wave plate 1. The first and second reinforcing plates have identical structures and are symmetrically arranged. The square-wave plate 1 has several continuous undulating square waves, and the two symmetrically arranged square-wave plates 1 ensure structural strength. The square-wave plate 1 is a metal plate, such as steel. The lightweight filler material 3 and the reinforcing keels 4 are both located between the two square-wave plates 1, i.e., between the first and second reinforcing plates. The lightweight filler material 3 uses insulation cotton or a foaming agent, ensuring the composite panel is lightweight and provides thermal insulation, waterproofing, and moisture resistance. The reinforcing keel 4 is a magnesium plate, and its shape can be rectangular, U-shaped, Z-shaped, trapezoidal, cylindrical, or triangular. The shape of the reinforcing keel 4 can be adjusted according to the actual use. Several reinforcing keels 4 are spaced apart within the lightweight filler material 3, and the reinforcing keels 4 can increase the strength of the sandwich composite panel. By setting the first reinforcing plate and the second reinforcing plate, i.e., setting two square wave plates 1, and adding several reinforcing keels 4 within the lightweight filler material 3, the composite panel has higher strength, is less prone to creases, has low design cost, simple structure, is easy to maintain and repair, and has a long service life.

[0049] In this embodiment, the length of one square wave of the square wave plate 1 is 50mm and the undulation amplitude is 1mm. The unfolded length of the square wave plate 1 is 1070mm (both ends are half the length of the square wave, i.e., 25mm), and the total length is 1090mm. The maximum distance between the first reinforcing plate and the second reinforcing plate, i.e. the two square wave plates 1, is 75mm.

[0050] In this embodiment, a first concave-convex interface 13 is formed at one end of the square wave plate 1, the lightweight filler material 3, and the square wave plate 1. A second concave-convex interface 14 is formed at the other end of the square wave plate 1, the lightweight filler material 3, and the square wave plate 1. The second concave-convex interface 14 is used to mate with the first concave-convex interface 13 of another high-strength sandwich composite plate. After the second concave-convex interface 14 and the first concave-convex interface 13 are mated, a 2mm mating gap 7 is left between them.

[0051] In this embodiment, the first concave-convex interface 13 has a structural shape consisting of a U-shaped groove and a pentagonal prism-shaped protrusion in the middle. (From the attached drawings) the minimum width distance at the left end of the pentagonal prism-shaped protrusion is 33mm, the maximum width distance at the right end is 51mm, and the length in the middle is 22mm. The structural shape of the second concave-convex interface 14 is adapted to the structural shape of the first concave-convex interface 13. The second concave-convex interface 14 has a pentagonal prism-shaped groove in the middle. (From the attached drawings) the minimum width distance at the left end of the pentagonal prism-shaped groove is 35mm, and the length or depth in the middle is 20mm.

[0052] In this embodiment, a first left step portion 11 is connected to one side of the square wave plate 1 via a rounded transition, and a hook-shaped portion 12 is connected to the other end of the square wave plate 1. The step height distance of the first left step portion 11 is 6mm, the length of the first step of the first left step portion 11 is 22mm, and the length of the second step is within 6.5mm; the length of the hook-shaped portion 12 is 20mm, and the total length of the hook-shaped portion 12 and the unfolded portion of the square wave plate 1 is 1090mm.

[0053] The beneficial effects of this embodiment are as follows: This composite panel is lightweight, high-strength, and has good thermal insulation performance, reducing the damage rate during transportation, transfer, and installation. The reinforced keel 4 increases the strength of the sandwich composite panel and reduces the wall design cost, with a weight difference not much from similar sandwich composite panels. Production, transportation, and installation processes are accelerated, making it suitable for various building exterior walls. This composite panel exhibits significant advantages in connection reliability, integrity, durable thermal insulation performance, waterproofing, moisture resistance, and energy-saving effects. These advantages not only improve the quality and performance of buildings but also provide strong support for the sustainable development of the construction industry.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations, combinations, or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-strength sandwich composite board, characterized in that, It includes a first reinforcing plate, a second reinforcing plate, a lightweight filler material (3), and several reinforcing keels (4). The first reinforcing plate is provided with several continuous undulating square waves, and the second reinforcing plate is provided with several continuous undulating corrugations or square waves. The lightweight filler material (3) and the reinforcing keels (4) are both arranged between the first reinforcing plate and the second reinforcing plate, and the several reinforcing keels (4) are spaced apart in the lightweight filler material (3).

2. The high-strength sandwich composite board according to claim 1, characterized in that, A square wave has a length of 50mm and an amplitude of 1mm, while a ripple has a length of 20mm and an amplitude of 1.5mm.

3. The high-strength sandwich composite board according to claim 2, characterized in that, The first reinforcing plate and the second reinforcing plate are both metal plates. The reinforcing keel (4) is a magnesium plate. The reinforcing keel (4) is in the shape of a rectangle, U, Z, trapezoid, cylinder, or triangle. The lightweight filling material (3) is thermal insulation cotton or foaming agent.

4. The high-strength sandwich composite board according to claim 1, characterized in that, The first reinforcing plate is a square wave plate (1), and the second reinforcing plate is a corrugated plate (2) or a square wave plate (1).

5. The high-strength sandwich composite board according to claim 4, characterized in that, One end of the square wave plate (1), the lightweight filler material (3), and the corrugated plate (2) forms a docking groove (5), and the other end of the square wave plate (1), the lightweight filler material (3), and the corrugated plate (2) forms a docking protrusion (6). The docking protrusion (6) is used to dock with the docking groove (5) of another high-strength sandwich composite plate.

6. The high-strength sandwich composite panel according to claim 4, characterized in that, The square wave plate (1), the lightweight filler material (3), and one end of the square wave plate (1) form a first concave-convex interface (13), and the other end of the square wave plate (1), the lightweight filler material (3), and the square wave plate (1) form a second concave-convex interface (14). The second concave-convex interface (14) is used to dock with the first concave-convex interface (13) of another high-strength sandwich composite plate.

7. The high-strength sandwich composite board according to claim 5, characterized in that, One end of the corrugated plate (2) is provided with a docking step (8), and the other end of the corrugated plate (2) is provided with a docking groove (9). The docking groove (9) is used to dock with the docking step (8) of another high-strength sandwich composite plate.

8. The high-strength sandwich composite board according to claim 7, characterized in that, After the docking protrusion (6) and the docking groove (5) are docked, a docking gap (7) is left between them. After the docking step (8) and the docking slot (9) are docked, a docking gap (7) is also left between them. The distance of the docking gap (7) is 2mm.

9. The high-strength sandwich composite panel according to claim 7, characterized in that, After the docking step (8) and the docking slot (9) are docked, a docking cavity (10) is left between them, and the docking cavity (10) is a right trapezoid.

10. The high-strength sandwich composite board according to claim 7, characterized in that, The unfolded lengths of the square wave plate (1) and the corrugated plate (2) are 1070mm and 1200mm respectively, and the distance between them is 50mm. The length of the docking step (8) is 47mm to 67mm, and the depth of the docking groove (9) is 49mm and the width is 18mm.

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