Wallboard connecting piece, prefabricated sandwich thermal insulation wallboard and preparation method

Abstract

The invention discloses a wallboard connecting piece, a prefabricated sandwich heat preservation wallboard and a preparation method, and particularly relates to the technical field of fabricated constructions.The wallboard connecting piece comprises a supporting frame set, the supporting frame set comprises a plurality of supporting frames and a plurality of connecting pieces, the multiple supporting frames are sequentially arranged at intervals in the first direction, and each supporting frame comprises an X-shaped supporting plate and four horizontal plates; the outer sides of the four ends of the X-shaped supporting plate are each fixedly connected with a horizontal plate, the horizontal plates are parallel to the first direction, the upper portion of the X-shaped supporting plate and the two horizontal plates fixedly connected with the upper portion of the X-shaped supporting plate are used for being arranged in a first concrete wall plate, the middle of the X-shaped supporting plate is used for being arranged in a heat preservation plate, and the lower portion of the supporting plate is used for being arranged in a second concrete wall plate. The two horizontal plates are fixedly connected with the lower portions of the X-shaped supporting plates and used for being arranged in a second concrete wall plate, and the four horizontal plates between every two adjacent X-shaped supporting plates are fixedly connected through a connecting piece. According to the connecting piece, the anchoring capacity of the connecting piece and the concrete wallboard can be improved, and the overall shear resistance of the wallboard is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled buildings, and in particular to a wall panel connector, a prefabricated sandwich insulation wall panel and a preparation method thereof. Background Art

[0002] Precast concrete sandwich insulation wall panels are precast wall panels that are connected into one by connectors, which are inner concrete wall panels, sandwich insulation layers and outer concrete wall panels. As an important component of precast sandwich insulation wall panels, the shear strength of connectors determines the in-plane shear performance of the wall panels. Connectors can be divided into metal connectors and non-metal connectors according to their material properties. The most commonly used metal connectors are wire truss connectors and stainless steel connectors. Metal connectors have the advantages of low processing cost and good fire resistance, but due to their poor corrosion resistance, they are prone to cause safety hazards to the wall. At the same time, the thermal conductivity of metal connectors is high, which easily forms a "cold and hot bridge" effect, thereby reducing the insulation performance of the wall panels.

[0003] In recent years, the use of non-metallic material connectors with good insulation performance has become a research hotspot and has been widely promoted and applied. Among them, fiber-reinforced plastic (FRP) connectors, as typical non-metallic connectors, are often used in precast concrete sandwich insulation wall panels. Compared with metal connectors, FRP connectors have the advantages of high tensile strength, low thermal conductivity, and good corrosion resistance, but their shear strength is low and they fracture brittlely when damaged, which poses certain safety hazards in actual engineering applications. In addition, the bonding area and connection form of FRP connectors and precast concrete sandwich insulation composite walls are not perfect enough, resulting in low anchoring performance. Summary of the invention

[0004] The purpose of the present invention is to provide a wall panel connector, a prefabricated sandwich insulation wall panel and a preparation method to solve the problems existing in the above-mentioned prior art, which can improve the anchoring capacity of the connector and the concrete wall panel and improve the overall shear resistance of the wall panel.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a wall panel connecting member, comprising a support frame group, wherein the support frame group comprises a plurality of support frames and a plurality of connecting members, wherein the plurality of support frames are arranged in sequence and at intervals along a first direction, wherein the support frame comprises an X-shaped support plate and four horizontal plates, wherein the outer sides of the four ends of the X-shaped support plate are fixedly connected with a horizontal plate, and the horizontal plate is parallel to the first direction, wherein the upper portion of the X-shaped support plate and the two horizontal plates fixedly connected to the upper portion of the X-shaped support plate are used to be placed in a first concrete wall panel, the middle portion of the X-shaped support plate is used to be placed in an insulation board, the lower portion of the support plate and the two horizontal plates fixedly connected to the lower portion of the X-shaped support plate are used to be placed in a second concrete wall panel, and the four horizontal plates between two adjacent X-shaped support plates are fixedly connected by a connecting member.

[0007] Preferably, there are multiple support frame groups, and the multiple support frame groups are arranged in sequence and at intervals along the second direction. The first direction is perpendicular to the second direction, the horizontal plate is parallel to the plane defined by the first direction and the second direction, and the horizontal plates at the four ends of two adjacent support frame groups are fixedly connected by a connecting member.

[0008] Preferably, the connecting member includes a U-shaped connecting rod and two nuts, and a connecting hole is opened on the horizontal plate. One end of the U-shaped connecting rod is used to pass through the two connecting holes of one of the support frames and be threadedly connected to the nut, and the other end of the U-shaped connecting rod is used to pass through the two connecting holes of another adjacent support frame and be threadedly connected to the nut, thereby fixing the two adjacent support frames in fixed connection.

[0009] Preferably, a semicircular groove is formed on one side of the horizontal plate facing the X-shaped support plate, and the semicircular groove is used to connect with the steel bars in the first concrete wall panel or the second concrete wall panel.

[0010] Preferably, the distance between two adjacent support frames along the first direction is 300 mm to 600 mm, and the distance between two adjacent support frames along the second direction is 400 mm to 800 mm.

[0011] Preferably, the support frame and the connecting member are both made of FRP material.

[0012] The present invention also provides a prefabricated sandwich insulation wall panel, comprising a first concrete wall panel, a second concrete wall panel, an insulation board and the wall panel connector, wherein the insulation board is placed between the first concrete wall panel and the second concrete wall panel.

[0013] Preferably, the insulation board has mounting holes having the same number as the support frame, and the support frame is used to be placed in the mounting holes.

[0014] Preferably, the insulation board is a polystyrene board, an extruded board or a rock wool board.

[0015] The present invention also provides a method for preparing the prefabricated sandwich insulation wall panel, comprising the following steps:

[0016] Step 1: setting the first concrete wall panel template, laying the steel mesh of the first concrete wall panel in the template, fixing the support frame on the steel mesh of the first concrete wall panel according to the construction design requirements, and then fixing and connecting the adjacent support frames through the connecting piece;

[0017] Step 2: pouring the first concrete wall panel to a specified thickness, compacting it with a vibrating device, and then leveling the concrete surface;

[0018] Step 3: opening mounting holes on the surface of the insulation board, the number of which is the same as that of the support frame and the positions of which match, and laying the insulation board before the initial setting of the first concrete wall panel, with the other half of the wall panel connector exposed from the mounting holes;

[0019] Step 4: sealing the gap between the wall panel connector and the insulation board by using polyurethane foam glue;

[0020] Step 5, setting a template for the second concrete wall panel on a side of the insulation board away from the first concrete wall panel, laying a steel mesh frame in the template, and then fixing the support frame on the steel mesh frame of the second concrete wall panel;

[0021] Step six, pour the second concrete wall panel to the specified thickness, compact it with a vibrating device, then level and polish the concrete surface, and cure it for 28 days to reach the designed strength.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention provides a wall panel connector, a prefabricated sandwich insulation wall panel and a preparation method. The structure of the X-shaped support plate can evenly disperse the force to each connection point. The X-shape forms a certain angle between the force direction and the shear force direction, which can more effectively transmit the shear force, thereby improving the overall shear resistance of the wall panel. The support frame includes an X-shaped support plate and four horizontal plates. The support frame is combined into a three-dimensional composite connector through a connector. The first concrete wall panel is fixedly connected to the second concrete wall panel through the three-dimensional composite connector. A three-dimensional space skeleton is formed by arranging the wall panel connectors, so that the wall panel as a whole obtains good spatial rigidity, can effectively control the relative displacement of the inner and outer leaf concrete wall panels, has strong controllability of construction quality, good firmness and strong stability, so that the prefabricated sandwich insulation wall panel has better shear resistance, pull-out resistance and anchoring performance, can effectively improve the composite degree of the prefabricated sandwich insulation wall panel, and improve the overall performance and bearing capacity of the wall panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the connection between the wall panel connector and the steel mesh;

[0026] Figure 2 It is a side view of the wall panel connector and the steel mesh;

[0027] Figure 3 is a structural schematic diagram of the support frame;

[0028] Figure 4 is a front view of the support frame;

[0029] Figure 5 is a structural schematic diagram of a connecting piece;

[0030] Figure 6 is a front view of the connecting piece;

[0031] Figure 7 It is a structural schematic diagram of a prefabricated sandwich insulation wall panel;

[0032] Figure 8 It is a side view of a prefabricated sandwich insulation wall panel;

[0033] Fig. 9 It is a schematic diagram of the structure of the insulation board.

[0034] In the figure: 100-wall panel connector; 1-support frame; 11-X-shaped support plate; 12-horizontal plate; 13-connecting hole; 14-semicircular groove; 2-connector; 21-U-shaped connecting rod; 22-nut; 3-first concrete wall panel; 4-insulation board; 41-mounting hole; 5-second concrete wall panel; 6-rebar. DETAILED DESCRIPTION

[0035] 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.

[0036] The purpose of the present invention is to provide a wall panel connector, a prefabricated sandwich insulation wall panel and a preparation method to solve the problems existing in the above-mentioned prior art, which can improve the anchoring capacity of the connector and the concrete wall panel and improve the overall shear resistance of the wall panel.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] This embodiment provides a wall panel connector, such as Figure 1-6 As shown, it includes a support frame group, which includes a plurality of support frames 1 and a plurality of connecting members 2. The plurality of support frames 1 are arranged in sequence along a first direction. The support frame 1 includes an X-shaped support plate 11 and four horizontal plates 12. The outer sides of the four ends of the X-shaped support plate 11 are fixedly connected with a horizontal plate 12, and the horizontal plate 12 is parallel to the first direction. The upper part of the X-shaped support plate 11 and the two horizontal plates 12 fixedly connected to the upper part of the X-shaped support plate 11 are used to be placed in the first concrete wall panel 3, the middle part of the X-shaped support plate 11 is used to be placed in the insulation board 4, the lower part of the support plate and the two horizontal plates 12 fixedly connected to the lower part of the X-shaped support plate 11 are used to be placed in the second concrete wall panel 5, and the four horizontal plates 12 between two adjacent X-shaped support plates 11 are fixedly connected by a connecting member 2. The structure of the X-shaped support plate 11 can evenly distribute the force to each connection point. When subjected to large tension, pressure or shear force, it can effectively avoid excessive force on a single point, reduce the risk of loosening or damage of the connector 2, and ensure the reliability of the connection; and the X-shaped support plate 11 is relatively compact, and while achieving efficient connection, it occupies a small space and can effectively utilize space resources. It has high shear and pull-out strength, good anchoring performance, and is easy to construct. Preferably, the support frame 1 is a pultruded plate, which has high strength and can withstand greater external forces and loads.

[0040] Preferably, the width of the X-shaped support plate 11 and the four horizontal plates 12 is 80 mm to 100 mm, and the upper and lower angles of the X-shaped support plate 11 are 30° to 60°, which can improve the anchoring ability of the wall panel connector 100 .

[0041] It is further preferred in the implementation manner of this embodiment that there are multiple support frame groups, the multiple support frame groups are arranged in sequence along the second direction, the first direction is perpendicular to the second direction, the horizontal plate 12 is parallel to the plane defined by the first direction and the second direction, and the horizontal plates 12 at the four ends of two adjacent support frame groups are fixedly connected by a connecting member 2.

[0042] In the implementation of the present embodiment, it is further preferred that the connector 2 includes a U-shaped connecting rod 21 and two nuts 22, both ends of the U-shaped connecting rod 21 are provided with threads, and a connecting hole 13 is provided on the horizontal plate 12, one end of the U-shaped connecting rod 21 sequentially passes through the two connecting holes 13 of one support frame 1 and is threadedly connected with the nut 22, and the other end of the U-shaped connecting rod 21 sequentially passes through the two connecting holes 13 of another adjacent support frame 1 and is threadedly connected with the nut 22, and the nuts 22 are tightly attached to the horizontal plate 12, so that the two adjacent support frames 1 are fixedly connected. The diameter of the connecting hole 13 is 1.2 times the diameter of the U-shaped connecting rod 21, and the diameter of the nut 22 is larger than the diameter of the connecting hole 13. By using the U-shaped connecting rod 21 and the nut 22 in combination, the anchoring performance between the support frame 1, the first concrete wall panel 3 steel mesh frame and the second concrete wall panel 5 steel mesh frame can be enhanced, and the stability of the support frame 1 during construction can be ensured.

[0043] In the implementation of the present embodiment, it is further preferred that a semicircular groove 14 is provided on one side of the horizontal plate 12 facing the X-shaped support plate 11, and the semicircular groove 14 is used to connect with the steel bars 6 in the first concrete wall plate 3 or the second concrete wall plate 5. The semicircular groove 14 can help ensure the position accuracy of the support frame 1 in the concrete steel bars 6, and can quickly fix the support frame 1 on the concrete steel bar grid, which is simple and convenient to construct. The support frame 1 does not need additional binding or welding fixation, which simplifies the installation process of the connector 2, reduces the construction difficulty, and effectively improves the construction efficiency; and the steel bars 6 are connected to the semicircular groove 14, which can prevent the support frame 1 from displacement or shaking during the concrete pouring process.

[0044] It is further preferred in the implementation manner of this embodiment that the distance between two adjacent support frames 1 along the first direction is 300 mm to 600 mm, and the distance between two adjacent support frames 1 along the second direction is 400 mm to 800 mm.

[0045] It is further preferred in the implementation manner of this embodiment that the support frame 1 and the connecting member 2 are both made of FRP material. FRP material has the advantages of high heat resistance and low thermal conductivity, which greatly improves the thermal insulation performance of the prefabricated sandwich insulation wall panel. Compared with the metal connecting member 2, the wall panel connecting member 100 made of FRP material can effectively reduce the thermal bridge effect of the wall.

[0046] Example 2

[0047] This embodiment provides a prefabricated sandwich insulation wall panel, such as Figure 7-8As shown, the prefabricated sandwich insulation wall panel comprises a first concrete wall panel 3, a second concrete wall panel 5, an insulation panel 4 and a wall panel connector 100 of Example 1, wherein the insulation panel 4 is placed between the first concrete wall panel 3 and the second concrete wall panel 5. The support frame 1, the connector 2, the steel mesh of the first concrete wall panel 3 and the steel mesh of the second concrete wall panel 5 are combined into a three-dimensional composite connector, so that the prefabricated sandwich insulation wall panel as a whole has good spatial rigidity, and the relative displacement between the first concrete wall panel 3 and the second concrete wall panel 5 can be effectively controlled, thereby improving the anchoring capacity of the wall panel connector 100 and the first concrete wall panel 3 and the second concrete wall panel 5.

[0048] In the implementation of this embodiment, it is further preferred that Fig. 9 As shown, the heat preservation board 4 has the same number of mounting holes 41 as the support frame 1 , and the support frame 1 is used to be placed in the mounting holes 41 to facilitate the positioning and installation of the heat preservation board 4 .

[0049] It is further preferred in the implementation manner of this embodiment that the insulation board 4 is a polystyrene board, an extruded board or a rock wool board.

[0050] Example 3

[0051] This embodiment provides a method for preparing the prefabricated sandwich insulation wall panel of embodiment 2, comprising the following steps:

[0052] Step 1, set up the template of the first concrete wall panel 3, and lay the steel mesh of the first concrete wall panel 3 in the template, according to the construction design requirements, clamp the transverse or longitudinal steel bars 6 at the specified grid of the steel mesh of the first concrete wall panel 3 into the two semicircular grooves 14 at the bottom of the support frame 1, and after clamping, pass one end of the U-shaped connecting rod 21 through the two connecting holes 13 on one side of a support frame 1 from bottom to top, and at the same time, pass the other end of the U-shaped connecting rod 21 through the two connecting holes 13 on one side of another adjacent support frame 1 from bottom to top, and then thread the nut 22 with the end of the U-shaped connecting rod 21, and make the nut 22 close to the top surface of the horizontal plate 12 on the upper part of the support frame 1; repeat the above operation, connect all the support frames 1 through the U-shaped connecting rod 21 and the nut 22, until the wall panel connector 100 forms a three-dimensional composite connector;

[0053] Step 2: pour the first concrete wall panel 3 to a specified thickness, compact it with a vibrating device, and then level the concrete surface;

[0054] Step 3: The surface of the insulation board 4 is provided with mounting holes 41 having the same number and matching positions as the support frame 1, and the cross-sectional area of ​​the mounting holes 41 is larger than the cross-sectional area of ​​the support frame 1. The insulation board 4 is laid before the first concrete wall panel 3 is initially set, and the other half of the wall panel connector 100 is exposed from the mounting holes 41; the surface of the insulation board 4 needs to be moistened with clean water before laying to ensure that the surface of the insulation board 4 and the concrete surface are fully fitted so that the two are better bonded together;

[0055] Step 4: Use polyurethane foam to seal the gap between the wall panel connector 100 and the insulation board 4;

[0056] Step 5: Set the template of the second concrete wall panel 5 on the side of the insulation board 4 away from the first concrete wall panel 3, loosen the nut 22 at the end of the U-shaped connecting rod 21, and then lay the steel mesh in the template, and insert the transverse or longitudinal steel bars 6 at the specified grid of the steel mesh of the second concrete wall panel 5 into the two semicircular grooves 14 on the upper part of the support frame 1. After clamping, tighten the nut 22 at the end of the U-shaped connecting rod 21 so that the nut 22 is close to the top surface of the horizontal plate 12 on the upper part of the support frame 1, so that the steel mesh of the second concrete wall panel 5 is fixed to the support frame 1;

[0057] Step six, pour the second concrete wall panel 5 to the specified thickness, use a vibrating device to compact it, then level and polish the concrete surface, and cure it for 28 days to reach the designed strength.

[0058] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A wall panel connector, characterized in that: It includes a support frame group, which includes a plurality of support frames and a plurality of connecting members. The plurality of support frames are arranged in sequence along a first direction. The support frame includes an X-shaped support plate and four horizontal plates. The outer sides of the four ends of the X-shaped support plate are fixedly connected with a horizontal plate, and the horizontal plate is parallel to the first direction. The upper part of the X-shaped support plate and the two horizontal plates fixedly connected to the upper part of the X-shaped support plate are used to be placed in a first concrete wall panel, the middle part of the X-shaped support plate is used to be placed in an insulation board, the lower part of the support plate and the two horizontal plates fixedly connected to the lower part of the X-shaped support plate are used to be placed in a second concrete wall panel, and the four horizontal plates between two adjacent X-shaped support plates are fixedly connected by a connecting member.

2. The wall panel connector according to claim 1, characterized in that: There are multiple support frame groups, and the multiple support frame groups are arranged in sequence along the second direction at intervals. The first direction is perpendicular to the second direction, the horizontal plate is parallel to the plane defined by the first direction and the second direction, and the horizontal plates at the four ends of two adjacent support frame groups are fixedly connected by a connecting member.

3. The wall panel connector according to claim 1, characterized in that: The connecting member includes a U-shaped connecting rod and two nuts, and a connecting hole is opened on the horizontal plate. One end of the U-shaped connecting rod is used to pass through the two connecting holes of one of the support frames and be threadedly connected to the nut, and the other end of the U-shaped connecting rod is used to pass through the two connecting holes of another adjacent support frame and be threadedly connected to the nut, so that the two adjacent support frames are fixedly connected.

4. The wall panel connector according to claim 1, characterized in that: A semicircular groove is formed on one side of the horizontal plate facing the X-shaped support plate, and the semicircular groove is used to be connected to the steel bars in the first concrete wall panel or the second concrete wall panel.

5. The wall panel connector according to claim 2, characterized in that: The distance between two adjacent support frames along the first direction is 300 mm to 600 mm, and the distance between two adjacent support frames along the second direction is 400 mm to 800 mm.

6. The wall panel connector according to claim 1, characterized in that: The support frame and the connecting piece are both made of FRP material.

7. A prefabricated sandwich insulation wall panel, characterized in that: It comprises a first concrete wall panel, a second concrete wall panel, an insulation board and the wall panel connecting member according to any one of claims 1 to 6, wherein the insulation board is placed between the first concrete wall panel and the second concrete wall panel.

8. The prefabricated sandwich insulation wall panel according to claim 7, characterized in that: The heat preservation board has the same number of mounting holes as the support frame, and the support frame is used to be placed in the mounting holes.

9. The prefabricated sandwich insulation wall panel according to claim 7, characterized in that: The thermal insulation board is a polystyrene board, an extruded board or a rock wool board.

10. A method for preparing the prefabricated sandwich insulation wall panel according to any one of claims 7 to 9, characterized in that: The steps include: Step 1: setting the first concrete wall panel formwork, laying the steel mesh of the first concrete wall panel in the formwork, fixing the support frame on the steel mesh of the first concrete wall panel according to the construction design requirements, and then fixing and connecting the adjacent support frames through the connecting piece; Step 2: pouring the first concrete wall panel to a specified thickness, compacting it with a vibrating device, and then leveling the concrete surface; Step 3: opening mounting holes on the surface of the insulation board, the number of which is the same as that of the support frame and the positions of which match, and laying the insulation board before the initial setting of the first concrete wall panel, with the other half of the wall panel connector exposed from the mounting holes; Step 4: sealing the gap between the wall panel connector and the insulation board by using polyurethane foam glue; Step 5, setting a template for the second concrete wall panel on a side of the insulation board away from the first concrete wall panel, laying a steel mesh frame in the template, and then fixing the support frame on the steel mesh frame of the second concrete wall panel; Step six, pour the second concrete wall panel to the specified thickness, compact it with a vibrating device, then level and polish the concrete surface, and cure it for 28 days to reach the designed strength.

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