CN212534795U - Multilayer composite board - Google Patents

Abstract

The application discloses a multilayer composite board, which comprises an upper board and a lower board, wherein the upper board is formed by a solidified first cement mixture and a first reinforcing grid cloth embedded in the first cement mixture, and a plurality of first convex ribs which protrude downwards and are parallel to each other are integrally formed on the lower surface of the upper board; the hypoplastron is strengthened the net cloth by the second cement mixture of solidification and the second of burying in the second cement mixture and is formed, and the upper surface of hypoplastron an organic whole is formed with the protruding second protruding muscle that makes progress and be parallel to each other of many, the protruding muscle of second and the vertical butt of first protruding muscle and the second cement mixture at the protruding muscle top of second fuses and the first cement mixture of first protruding muscle bottom each other and concreties as an organic whole. The multilayer composite board has high structure strength, is not easy to crack and deform, is simple to manufacture, can be very thin in thickness, can be processed and molded in a factory in advance and then transported to a field for installation, and can be widely applied to the field of buildings.

Description

Multilayer composite board

Technical Field

The application relates to a composite board, in particular to a multilayer composite board.

Background

Along with the continuous development of the building industry, building materials are continuously updated and changed, the production mode of buildings is changed, the assembly type buildings advocated at present are rising, building modularization is a trend inevitably, but the structural panels of building modules do not have good building materials, the plates which can be reluctantly used at present are divided into organic plates and inorganic plates, wherein the organic plates comprise traditional wood fiber boards, shaving boards, European pine boards and wood fiber boards, the shaving boards and the European pine boards are inflammable, the fireproof performance is poor, the problem of formaldehyde release exists, the plate bodies expand after absorbing water and directly lose the service performance, the strength is low, the plate bodies are easy to crush, and the assembly type building modules are not suitable for assembly type building walls with prefabricated frame structures, particularly outer walls.

Compare in above-mentioned organic class panel, inorganic panel's waterproof and fireproof performance has certain advantage, common available inorganic panel includes cement fiberboard, glass magnesium flat board, the gypsum board, there is material density height in these several kinds of inorganic panels, it is heavier to become the board weight, there is the micropore in the overall structure, lack toughness, it is broken easily to take place when receiving impact stress and shear stress's influence, structural strength is low and the nail-holding power is poor, the panel of single texture is placed for a long time and is easily taken place buckling deformation, problems such as manufacturing cost is higher, and the magnesium oxychloride cement that adopts in the glass magnesium flat board has the corrosivity to the reinforcing material wherein, use the brittleness gradually to improve for a long time, structural strength reduces.

Chinese utility model patent No. ZL200720020883.8 discloses a fine and close compound light inside and outside wallboard, this wallboard include outer thick liquids layer, and the landfill has plastic-coated glass fiber net cloth in the thick liquids layer, and the inside cladding of thick liquids layer has the foam layer, has the through-hole in the foam layer, has filled the column thick liquids body in the through-hole. Although the wallboard has various excellent performances, the following defects exist:

1. the columnar slurry body poured and solidified in the through hole of the foam plastic layer mainly plays a role of connecting an external upper slurry layer and an external lower slurry layer, the columnar slurry body does not provide any help for the bending resistance of the whole wallboard, the bending resistance of the wallboard is completely provided by the glass fiber mesh cloth in the slurry layers, and therefore the wallboard is easy to collapse and deform when bearing large bending torque.

2. The wallboard has the great disadvantages that the wallboard is formed by integrally pouring in a mould, and the wallboard manufactured in the mode has low structural strength and production efficiency, large thickness and difficulty in thinning.

In view of the above problems, it is desirable to provide a multifunctional composite board with high structural strength, strong nail-holding power, good weather resistance, adaptability to industrial continuous production, and adaptability to modular structure in modular assembly type buildings.

Disclosure of Invention

The purpose of the application is: the multilayer composite board has high strength, is not easy to crack and deform, is simple to manufacture, can be very thin in thickness, can be processed and formed in a factory in advance and then transported to a field for installation, and can be widely applied to the field of buildings.

The technical scheme of the application is as follows:

a multi-layer composite panel comprising:

an upper plate formed of a cured first cement mixture and a first reinforcing mesh cloth buried in the first cement mixture, the lower surface of the upper plate integrally formed with a plurality of first beads protruding downward and being parallel to each other; and

the lower plate is arranged below the upper plate in parallel and is formed by a solidified second cement mixture and a second reinforcing grid cloth buried in the second cement mixture, a plurality of second convex ribs which protrude upwards and are parallel to each other are integrally formed on the upper surface of the lower plate, the second convex ribs are vertically abutted to the first convex ribs, and the second cement mixture at the tops of the second convex ribs and the first cement mixture at the bottoms of the first convex ribs are mutually fused and fixed into a whole.

The first reinforcing grid cloth is glass fiber cloth or a steel wire mesh, and the second reinforcing grid cloth is glass fiber cloth or a steel wire mesh.

The first reinforcing mesh cloth is disposed on an upper surface or a lower surface of the upper plate, and the second reinforcing mesh cloth is disposed on an upper surface or a lower surface of the lower plate.

The first reinforcing mesh cloth and the second reinforcing mesh cloth are both provided with at least two layers.

Wherein one layer of the first reinforcing mesh cloth is arranged on the upper surface of the upper plate, and the other layer of the first reinforcing mesh cloth is arranged on the lower surface of the upper plate; wherein one layer of the second reinforcing mesh cloth is arranged on the upper surface of the lower plate, and the other layer of the second reinforcing mesh cloth is arranged on the lower surface of the lower plate.

A portion of the first reinforcing mesh cloth is embedded in the first ribs, and a portion of the second reinforcing mesh cloth is embedded in the second ribs.

The first reinforcing mesh cloth is embedded in the first cement mixture with a preset tensile prestress, and the second reinforcing mesh cloth is embedded in the second cement mixture with a preset tensile prestress.

And a gap between the upper plate and the lower plate is filled with filler.

The filler is a heat insulating material or a sound insulating material.

The filler is selected from one or a mixture of more than two of foamed plastic, bamboo sawdust, perlite and foamed concrete.

Unsaturated resin is added into the first cement mixture or/and the second cement mixture.

The thread tooth socket is fixedly connected in the first convex rib or/and the second convex rib.

And the upper surface of the multilayer composite plate is provided with a bolt passing hole which extends downwards and is coaxially communicated with the internal thread hole of the thread tooth socket.

The upper end face of the thread tooth socket is flush with or protrudes out of the upper surface of the multilayer composite board.

The outer wall surface of the thread tooth socket is provided with self-tapping threads, and the thread tooth socket is tapped into the first convex ribs or/and the second convex ribs by means of the self-tapping threads.

The thread tooth socket is embedded in the first convex rib or/and the second convex rib.

The first convex ribs and the second convex ribs are straight ribs, and are distributed at equal intervals.

The upper surface of multilayer composite board is equipped with the sign of instructing first protruding muscle position, the lower surface of multilayer composite board is equipped with the sign of instructing second protruding muscle position.

A water-proofing agent is added to the first cement mixture and the second cement mixture.

The first cement mixture and the second cement mixture are both cement mortar.

The first cement mixture comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, Portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement;

the second cement mixture comprises one or the combination of more than two of quick-hardening early-strength sulphoaluminate cement, ferro-aluminate cement, Portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high-alumina cement

The application has the advantages that:

1. the both sides of this kind of composite sheet of this application are inside to be buried and have strengthened net cloth cement mixture board, and the opposite side of cement mixture board about and is provided with protruding muscle respectively an organic whole, the protruding muscle of upper plate supports with the protruding muscle of hypoplastron relatively to lean on and with the help of the mutually fused infiltration of cement mixture and fixed the combination together, its structural integrity is good, difficult fracture deformation, 0.5-8cm can be accomplished to thickness, it has sufficient structural strength to guarantee it when can realize this composite sheet lightweight on furthest, but wide application in the building field, the wall panel of specially adapted preparation steel construction building, or indoor partition wall, the cabinet body board.

2. The gaps of the upper plate and the lower plate are filled with light materials, so that the composite plate is convenient to manufacture, and the heat insulation and sound insulation performance of the composite plate can be improved.

3. The space between the upper plate and the lower plate can be a cavity structure without any material, so that the dead weight and the material consumption of the composite plate can be further reduced.

4. The upper plate main body and the lower plate main body are separated by the first convex ribs and the second convex ribs at a certain distance, relatively loose (compared with a more cured cement mixture) filler can be selectively filled into gaps between the upper plate and the lower plate, and the filler in the gaps or the gaps can absorb the deformation of the upper plate and the lower plate, so that the composite plate is prevented from generating large deformation or cracking.

5. The unsaturated resin is added into the cement mixture for manufacturing the upper plate and the lower plate, so that the mechanical property and the nail-holding power of the composite plate are remarkably improved, a self-tapping screw or a thread tooth socket can be directly locked into the composite plate in actual application so as to enable the structural plate to be fixedly connected with related members (without arranging a through hole on the structural plate), and the problem that the self-tapping screw or the thread tooth socket falls off due to the fact that the composite plate is too brittle and collapses is solved. The composite plate has greatly optimized interface crushing resistance and compression strength, and the tapped part has high inner surface smoothness and less cracking.

6. Because of this structural slab is inside can firmly the tapping, so it can be as partition wall and cabinet body panel in the house, can firmly install parts such as self tapping screw, hinge when using as partition wall or cabinet body board, compare in shaving board commonly used, medium density fiberboard and wooden multilayer plywood, this structural slab intensity is higher, and the weatherability is better, has good waterproof and fireproof performance and extremely strong nail-holding power, manufacturing cost is lower, and does not contain formaldehyde, can not pollute the indoor environment.

7. Even if the self-tapping screw or the thread tooth socket locked in the composite board is subjected to enough external tension to be taken away from the surrounding cement mixture and be pulled out together, the reinforcing mesh cloth anchored in the cement mixture at the outer side can also prevent the screw or the thread tooth socket from being pulled out.

8. The surface of this composite sheet has set up the sign that corresponds inside protruding muscle position, can find out the position of inside protruding muscle fast when practical application to with the accurate lock of self-tapping screw in protruding muscle.

9. The cement mixture in the upper and lower board can be added with a waterproof agent, so that the waterproof performance of the composite board is improved, a waterproof layer is not required to be coated on the surface of the composite board, and compared with the traditional waterproof layer coating mode, the fine gaps and holes on the surface of the composite board can be effectively reduced, and the waterproof efficiency is better.

10. The reinforcing mesh cloth is arranged in the cement mixture of the upper plate or the lower plate with preset tensile prestress, so that the tensile strength and the bending strength of the composite plate are greatly improved.

11. The retarder can be filled in the first cement mixture and the second cement mixture to slow down the consolidation speed of the cement mixtures, so that the situation that the upper plate and the lower plate cannot be stably connected due to the fact that the cement mixtures of the upper plate and the lower plate are rapidly solidified in the manufacturing process of the composite plate is avoided, and the added retarder can prevent the cement mixtures from generating transient setting reaction to cause overlarge brittleness of finished products.

12. This application adopts the composite sheet of special technology preparation, and whole board thickness can be as little as 0.5cm, can guarantee that it has sufficient structural strength when realizing this composite sheet lightweight to the furthest, but wide application in the building field, the specially adapted makes the side fascia of steel construction building.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective cross-sectional view of a multilayer composite board according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a multi-layer composite panel according to an embodiment of the present disclosure;

fig. 3 is a diagram illustrating a practical application of a multi-layer composite board according to an embodiment of the present disclosure;

fig. 4 is a schematic cross-sectional view of a multi-layer composite plate according to a second embodiment of the present application;

fig. 5 is a second illustration of the practical application of the multilayer composite board in the third embodiment of the present application;

FIG. 6 is a schematic perspective view of a thread socket according to a third embodiment of the present application;

fig. 7 is a schematic perspective view of a thread sleeve at another viewing angle according to a third embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of a thread socket according to a third embodiment of the present application;

wherein: 1-upper plate, 2-lower plate, 3-logo, 4-light material, 5-thread tooth socket, 6-screw, 7-self-tapping screw, 101-first convex rib, 201-second convex rib, 1 a-first reinforced grid cloth, 1 b-first cement mixture, 2 a-second reinforced grid cloth, 2 b-second cement mixture and 5 a-self-tapping screw.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In the description of the present specification, the terms "connected", "mounted", "fixed", and the like are to be understood in a broad sense. For example, "connected" may be fixedly connected, detachably connected, or integrally connected; may be connected directly or indirectly through intervening media. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present application.

The first embodiment is as follows:

fig. 1 and 2 show a preferred embodiment of the multilayer composite panel of the present application, which is mainly composed of an upper panel 1 and a lower panel 2 connected to each other. Wherein the upper plate 1 and the lower plate 2 are arranged in parallel one above the other.

The aforementioned upper and lower panels 1 and 2 have the same structure in which the upper panel 1 is formed of a cured first cement mixture 1b and a first reinforcing mesh 1a embedded in the first cement mixture 1b, and the lower surface of the upper panel 1 is integrally formed with a plurality of first beads 101 protruding downward and parallel to each other. The lower plate 2 is formed of a cured second cement mixture 2b and a second reinforcing mesh 2a embedded in the second cement mixture, and a plurality of second beads 201 protruding upward and parallel to each other are integrally formed on the upper surface of the lower plate 2. The vertical butt of second protruding muscle 201 and first protruding muscle 101 to the second cement mixture 2b at second protruding muscle 201 top states the first cement mixture 1b of first protruding muscle 101 bottom and fuses each other (interpenetration) and concreties as an organic wholely, thereby realizes the fixed connection of first protruding muscle 101 and second protruding muscle 201, and then realizes the fixed connection of upper plate 1 and hypoplastron 2.

The present embodiment may further fill the gap between the upper plate 1 and the lower plate 2 with a filler 4 having thermal insulation and/or sound insulation based on certain requirements for thermal insulation and sound insulation of the composite plate used in certain use environments.

The filler 4 is preferably made of a lightweight material such as foamed plastic, bamboo chips, perlite, foamed concrete, etc., but it may be made of a mixture of any two or more of the above four materials.

Now, referring to fig. 1 and fig. 2, the method for manufacturing the composite board of this embodiment is described as follows, which mainly includes the following three steps:

s1: a second reinforcing mesh cloth 2a and a second cement mixture 2b for forming the lower plate 2 are laid and it is ensured that a plurality of second beads 201 protruding upward are formed on the upper surface of the lower plate 2. The filling material 4 is filled in the gap between the second ribs 201, and the filling height of the filling material needs to be higher than that of the second ribs 201 to fill the gap between the first ribs 101.

In order to prevent the second cement mixture 2b from being scattered and loosened during the manufacturing process, in this step S1, the second cement mixture 2b having the second reinforcing mesh 2a embedded therein may be extruded by means of an extrusion molding apparatus so that the second cement mixture 2b (having the first reinforcing mesh 2a embedded therein) is preliminarily shaped into a plate. Also, the plurality of second beads 201 can be naturally formed by optimizing the structure of the aforementioned extrusion molding apparatus so that the second cement mixture 2b is extruded on the upper surface thereof.

S2: before the second cement mixture 2b is cured, the first reinforcing mesh cloth 1a and the first cement mixture 1b for forming the upper panel 1 are laid, and it is ensured that the lower surface of the upper panel 1 is formed with a plurality of downwardly convex first beads 101. The first bead 101 is arranged in contact above the second bead 201.

At this time, the first cement mixture 1a and the second cement mixture 2a are not completely cured, and the rib portions of the upper plate and the lower plate are in contact with each other, so that the first cement mixture 1a and the third cement mixture at the contact portions of the first rib and the second rib are fused with each other and are cured into a whole after a certain period of time.

In order to prevent the first cement mixture 1b from being scattered and loosened during the manufacturing process, the first cement mixture 1b having the first reinforcing mesh cloth 1a embedded therein may be extruded by means of an extrusion molding apparatus so that the first cement mixture 1b (having the first reinforcing mesh cloth 1a embedded therein) is preliminarily shaped like a plate in step S2. Also, the plurality of first beads 101 can be naturally formed by optimizing the structure of the extrusion molding apparatus so that the first cement mixture 2b is extruded on the upper surface thereof.

As can be seen from the above, after the step S2 is completed, a composite board initial product is obtained, in which the upper plate and the lower plate are fixed together and the gap is filled with filler, and the composite board initial product has a certain quality and can be completely sold and used as a finished product. However, in order to further improve the quality of the composite board, so that the bonding strength between the upper board and the lower board and the filler is higher, and the strength of the upper board and the lower board is enhanced, the present embodiment further performs the following step S3.

S3: applying a Z-direction pressing force (i.e., a vertical pressing force) for urging the upper plate 1 and the lower plate 2 to approach each other to the composite board preform obtained in step S3; at the same time, an X-direction pressing force perpendicular to the length of the first bead and a Y-direction pressing force parallel to the length of the first bead are also applied to the composite board preform obtained in step S3.

It can be understood that the aforementioned Z-direction extrusion force can increase the contact force between the first rib 101 of the upper plate and the second rib 201 of the lower plate, so as to increase the mutual melting degree of the cement mixture at the contact position of the two, thereby enhancing the connection strength of the upper plate 1 and the lower plate 2. The X-direction extrusion force and the Y-direction extrusion force can prevent the composite board primary product from collapsing outwards when the Z-direction pressure is applied, and are matched with the Z-direction extrusion force, the force in the three directions of XYZ wholly wraps the middle composite board primary product to wholly extrude the composite board primary product, so that the bonding strength of the upper plate, the lower plate and the filler is further improved, and meanwhile, the self strength of the upper plate and the lower plate is respectively enhanced.

In step S1, the filler 4 may not be filled in the space between the second beads 201; the finished composite board has no stuffing and gap structure between the upper and lower boards, and this can reduce the dead weight and material consumption of the composite board.

The composite board manufactured by the process has the whole thickness of 0.5cm, generally 0.5-8 cm. The composite board can be lightened to the maximum extent, and meanwhile, the composite board has enough structural strength, can be widely applied to the field of buildings, and is particularly suitable for manufacturing external wall boards of steel structure buildings.

This example adds an unsaturated resin to the first and second cement mixtures used to form the upper and lower plates. The unsaturated resin is a viscous liquid obtained by dissolving a linear polymer compound containing unsaturated dibasic acid or dihydric alcohol, which is obtained by condensation polymerization of dibasic acid and dihydric alcohol, in a monomer (usually styrene). The addition of unsaturated resins to cement mixes can reduce brittleness, increase toughness and flexibility. This embodiment is through adding unsaturated polyester in cement mixture, is showing the mechanical properties who has promoted the composite sheet, has solved the difficult and poor problem of nail-holding power of nailing of composite sheet.

As shown in fig. 3, in practical application, the self-tapping screw 7 can be directly locked into the first rib and the second rib with high strength along the thickness direction of the composite board, so that the composite board can be locked and fixed on the surface of the relevant component (such as a steel frame, a roof, etc.) by using the self-tapping screw 7, or the relevant object (such as a hook, a television, etc.) can be locked and fixed on the composite board by using the self-tapping screw 7. Because the upper plate and the lower plate are formed by solidifying the cement mixture added with the unsaturated resin, the mechanical property is excellent, the nail holding force is strong, after the self-tapping screw 7 taps the first convex rib or/and the second convex rib, the thread strength formed in the upper plate or/and the lower plate is extremely high and is not easy to collapse, the locking force of the self-tapping screw 7 and the upper plate or/and the lower plate is further ensured, and the self-tapping screw 7 is not easy to be separated from the composite plate.

In order to quickly find out the positions of the first protrusion and the second protrusion in the composite board in practical application, so as to accurately lock the self-tapping screw 7 into the first protrusion or/and the second protrusion, the mark 3 located right above the first protrusion to indicate the position of the first protrusion is arranged on the upper surface of the composite board, and the mark 3 located right below the second protrusion to indicate the position of the second protrusion is arranged on the lower surface of the composite board.

The first cement mixture 1b and the second cement mixture 2b adopt the same components, and separate ingredients are not needed to be separately prepared for the upper plate 1 and the lower plate 2, so that the manufacturing process and the cost of the composite plate are simplified.

In this embodiment, the first ribs 101 and the second ribs 201 are linear ribs extending linearly, and each of the first ribs 101 is arranged at equal intervals, and each of the second ribs 201 is arranged at equal intervals.

In order to allow the first reinforcing mesh cloth 1a cured in the upper panel 1 and the second reinforcing mesh cloth 2a cured in the lower panel 2 to be in a tensioned state, thereby allowing the upper panel 1 and the lower panel 2 to have a strong deformation resistance, it is preferable that, in manufacturing the composite panel, the first reinforcing mesh cloth 1a is tensioned to maintain the first reinforcing mesh cloth 1a in a tensioned state, and then the first cement mixture 1b is laid outside the first reinforcing mesh cloth 1 a; similarly, the second reinforcing mesh cloth 2a is tensioned to maintain the second reinforcing mesh cloth 2a in a tensioned state.

In order to improve the waterproof performance of the composite board, the first cement mixture 1b and the second cement mixture 2b can also adopt a waterproof cement mixture added with a waterproof agent, so that a waterproof layer does not need to be coated on the surface of the composite board, the fine gaps and holes on the surface of the composite board are further effectively reduced, and the waterproof performance is better.

In addition, in order to avoid that the cement mixture in the upper plate and the lower plate is quickly cured in the process of manufacturing the composite plate, so that the upper plate and the lower plate cannot be stably connected, a retarder can be filled in the first cement mixture 1b, the second cement mixture 2b and the third cement mixture to slow down the solidification speed of the cement mixtures, and the retarder can prevent the cement mixtures from generating transient setting reactions to cause overlarge brittleness of finished products.

Example two:

fig. 4 shows a second preferred embodiment of the multilayer composite panel of the present application, the composite panel of this embodiment having substantially the same structure as the one of the above embodiment, with the only difference that: two layers of first reinforcing gridding cloth 1a are embedded in the upper plate 1, and the two layers of first reinforcing gridding cloth 1a are arranged at intervals up and down; two layers of second reinforcing mesh cloths 2a are buried in the lower plate 1, and the two layers of second reinforcing mesh cloths 2a are spaced apart from each other up and down.

The two layers of the reinforcing mesh cloth in the upper plate and the lower plate are arranged at intervals up and down, so that the tensile strength and the bending strength of the upper plate, the lower plate and the whole composite plate can be further improved.

Referring to fig. 3 again, in this embodiment, a part of the lower layer of the first reinforcing mesh cloth is embedded in the first ribs 101, and a part of the upper layer of the second reinforcing mesh cloth is embedded in the second ribs 201, so that the structural strength of the first ribs 101 and the second ribs 201 can be improved.

Also, the first reinforcing mesh 1a may be disposed very close to the upper or lower surface of the upper plate 1, and may even be disposed on the upper or lower surface of the upper plate 1 (at this time, most or all of the first reinforcing mesh is still fixedly buried inside the upper plate 1). Correspondingly, the second reinforcing mesh 2a may be disposed very close to the upper or lower surface of the lower plate 2, and may even be disposed on the upper or lower surface of the lower plate 2 (at which time most or all of the second reinforcing mesh is still fixedly buried inside the lower plate 2).

Example three:

fig. 5 to 8 show a third preferred embodiment of the multilayer composite panel of the present application, the composite panel of this embodiment having substantially the same structure as the composite panel of the previous embodiment, with the only difference that: the thread tooth socket 5 is fixedly arranged in the composite plate, and the axial dimension of the thread tooth socket 5 is large, so that the upper end surface of the thread tooth socket 5 extends out of the upper surface of the composite plate and is flush with the upper end surface of the composite plate.

The thread tooth socket 5 is specifically arranged at a position facing the first convex rib and the second convex rib. In order to improve the connection strength between the thread socket 5 and the composite plate, the thread socket 5 is fixedly connected to the inside of the first convex rib and the second convex rib.

In practical application, the screw 6 engaged with the thread socket 5 is directly locked, so that the composite board is fastened to the outer surface of the steel structure by the screw 6 to be used as an external wall panel of the steel structure wall, or various components such as a television, a hook and the like are fastened to the side of the composite board by the screw 6.

Of course, the thread sockets 5 may be completely embedded inside the composite plate, and at this time, a through bolt hole extending vertically and coaxially communicating with the internal thread hole of the thread socket 5 needs to be made on the surface of the composite plate to facilitate the locking of the screw 6.

In this embodiment, the thread sockets 5 are fixed in the composite plate in such a way that: the outer wall surface of the thread insert 5 is provided with a self-tapping thread 5a (i.e., an external thread having a self-tapping function), and the thread insert 5 is driven into the first rib or/and the second rib by means of the self-tapping thread 5 a. Of course, the thread insert 5 may be embedded in the upper or lower plate (corresponding to the position of the ribs) that has not yet been cured.

It should be noted that the first reinforcing mesh cloth in the upper plate 1 and the second reinforcing mesh cloth in the lower plate 2 may be provided in multiple layers. And the first reinforcing mesh 1a may be disposed at a position in the middle of the thickness of the upper plate 1, or may be disposed very close to the upper or lower surface of the upper plate 1, or even at the upper or lower surface of the upper plate 1 (at this time, most or all of the first reinforcing mesh is still fixedly buried inside the upper plate 1). Likewise, the second reinforcing scrim may be disposed at a position intermediate the thickness of the lower plate, at a position very close to the upper or lower surface of the lower plate 2, or even at a position on the upper or lower surface of the lower plate (where most or all of the second reinforcing scrim is still fixedly embedded within the lower plate 2).

It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present application, and the present application is not limited thereto. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims (19)

1. A multi-layer composite panel, comprising:

an upper plate (1) formed of a cured first cement mixture (1b) and a first reinforcing mesh (1a) buried in the first cement mixture, the upper plate (1) having a lower surface integrally formed with a plurality of first beads (101) protruding downward and parallel to each other; and

a lower plate (2) arranged in parallel below the upper plate and formed by a cured second cement mixture (2b) and a second reinforcing mesh (2a) buried in the second cement mixture, wherein a plurality of second ribs (201) protruding upwards and parallel to each other are integrally formed on the upper surface of the lower plate (2), the second ribs (201) are vertically abutted against the first ribs (101), and the second cement mixture (2b) at the tops of the second ribs (201) and the first cement mixture (1b) at the bottoms of the first ribs (101) are mutually fused and fixed into a whole.

2. The multilayer composite panel according to claim 1, wherein the first reinforcing scrim (1a) is a fiberglass cloth or a steel wire mesh, and the second reinforcing scrim (2a) is a fiberglass cloth or a steel wire mesh.

3. The multilayer composite panel according to claim 1, wherein the first reinforcing mesh cloth (1a) is disposed on the upper surface or the lower surface of the upper panel (1), and the second reinforcing mesh cloth (2a) is disposed on the upper surface or the lower surface of the lower panel (2).

4. The multilayer composite panel according to claim 1, characterized in that the first reinforcing scrim (1a) and the second reinforcing scrim (2a) are each provided with at least two layers.

5. The multilayer composite panel according to claim 4, wherein one layer of the first reinforcing scrim (1a) is arranged on the upper surface of the upper panel (1) and the other layer of the first reinforcing scrim (1a) is arranged on the lower surface of the upper panel (1); wherein one layer of the second reinforcing mesh cloth (2a) is arranged on the upper surface of the lower plate (2), and the other layer of the second reinforcing mesh cloth (2a) is arranged on the lower surface of the lower plate (2).

6. The multilayer composite panel according to claim 1, wherein a portion of the first reinforcing scrim (1a) is embedded in the first bead (101) and a portion of the second reinforcing scrim (2a) is embedded in the second bead (201).

7. The multilayer composite panel according to claim 1, characterized in that the first reinforcing scrim (1a) is embedded in the first cement mixture (1b) with a predetermined tensile prestress and the second reinforcing scrim (2a) is embedded in the second cement mixture (2b) with a predetermined tensile prestress.

8. The multilayer composite panel according to claim 1, characterized in that the interspace between the upper panel (1) and the lower panel (2) is filled with a filler (4).

9. The multilayer composite panel according to claim 8, characterized in that the filler (4) is a thermal or acoustic insulation material.

10. The multilayer composite panel according to claim 8, wherein the filler is selected from one of foam plastic, bamboo sawdust, perlite, and foamed concrete.

11. The multilayer composite plate according to claim 1, further comprising a thread socket (5), wherein the thread socket (5) is fixedly connected in the first bead (101) or/and the second bead (201).

12. The multilayer composite plate according to claim 11, wherein the upper surface of the multilayer composite plate is formed with a through-bolt hole extending downward and coaxially communicating with the internally threaded hole of the thread socket (5).

13. The multilayer composite board according to claim 11, characterized in that the upper end face of the thread socket (5) is flush with or protrudes from the upper surface of the multilayer composite board.

14. The multilayer composite panel according to claim 11, characterized in that the outer wall surface of the thread socket (5) is provided with a self-tapping thread (5a), the thread socket (5) being tapped into the first bead (101) or/and the second bead (201) by means of the self-tapping thread (5 a).

15. The multilayer composite panel according to claim 11, characterized in that the thread sockets (5) are pre-embedded in the upper panel (1) or the lower panel (2).

16. The multilayer composite plate according to claim 1, wherein the first ribs (101) and the second ribs (201) are both straight ribs, and wherein each of the first ribs (101) is arranged equidistantly and each of the second ribs (201) is arranged equidistantly.

17. The multilayer composite plate according to claim 1, wherein the upper surface of the multilayer composite plate is provided with a marking (3) indicating the position of the first bead (101), and the lower surface of the multilayer composite plate is provided with a marking (3) indicating the position of the second bead (201).

18. The multilayer composite panel according to claim 1, characterized in that both the first cement mixture (1b) and the second cement mixture (2b) are cement mortars.

19. The multilayer composite panel according to claim 1,

the first cement mixture (1b) comprises one of fast hardening early strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus-magnesium cement and high alumina cement;

the second cement mixture (2b) comprises one of fast hardening early strength sulphoaluminate cement, ferro-aluminate cement, portland cement, magnesium oxychloride cement, phosphorus magnesium cement and high alumina cement.

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