Novel prefabricated sandwich heat-preservation externally-hung wallboard

Abstract

The utility model relates to a novel prefabricated sandwich thermal insulation external wall panel which comprises an inner acanthus, an inner acanthus CFRP (carbon fiber reinforced plastic) rib net, a thermal insulation board, an outer acanthus CFRP rib net and an outer acanthus, the inner acanthus, the outer acanthus and the heat preservation plate are bonded through W glue, a plurality of split pipe type pulling pieces penetrating through the heat preservation plate are arranged in the externally-hung wall plate, and the split pipe type pulling pieces are anchored between the inner acanthus and the outer acanthus and are in lap joint with a CFRP rib net of the inner acanthus through FRP short ribs; embedded parts are arranged at the four corners of the externally-hung wall plate, each embedded part comprises an inner threaded steel sleeve and a high-strength bolt which penetrate through the heat preservation plate and are anchored between the inner acanthus and the outer acanthus, one end of each high-strength bolt is connected with the corresponding inner threaded steel sleeve through mechanical engagement, and the other end of each high-strength bolt extends out of the corresponding inner acanthus to be connected with the main body structure. According to the externally-hung wallboard, the high combination and connection performance between the heat preservation board and the leaf board is achieved through the combined action of the split pipe type pulling pieces and the W glue; the connection mode of the novel prefabricated sandwich heat preservation externally-hung wallboard and the main body structure improves the construction efficiency, and factory production is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of external wall panel technology, and relates to a new type of prefabricated sandwich insulated external wall panel. Background Technology

[0002] The construction industry is a key sector for achieving the "dual carbon" goals. In my country, building energy consumption design focuses on exterior walls, with prefabricated sandwich insulated exterior wall panels becoming the mainstream choice. This is crucial for achieving building energy conservation and developing green and low-carbon buildings, and has enormous market potential. Prefabricated sandwich insulated exterior wall panels consist of inner and outer leaf panels, insulation materials, tie rods, and embedded parts connecting to the main structure. Effective connections between the leaf panels and the insulation materials, and between the sandwich wall panels and the main frame, are essential for achieving the integrated functions of decoration, insulation, and low energy consumption.

[0003] Existing precast sandwich insulated wall panel tie rods are mainly divided into fiber-reinforced plastic (FRP) rod tie rods and metal plate tie rods. Metal tie rods suffer from severe thermal bridging, are prone to corrosion, are costly, and are susceptible to eccentricity issues. FRP tie rods have low thermal conductivity and good durability, but they have low shear strength and are prone to shear failure at the interface. Furthermore, current fiber tie rods are predominantly rod-shaped, making them easily pulled out when anchored only in concrete. During pouring, misalignment or tilting between the reinforcing mesh and the tie rod can easily occur, affecting construction accuracy. Improving the composite performance of sandwich wall panels aligns with development trends, but most commercially available tie rods currently fail to provide the necessary high composite performance for the wall panels.

[0004] Currently, embedded parts also have problems such as difficulties in wall panel assembly due to welding errors, and the connection between the extended part of the embedded part and the main structure is not firm and easy to pull out. Using internally threaded steel sleeves with extended screws to connect prefabricated sandwich wall panels is a relatively widespread solution. However, the cost of internally threaded sleeves increases significantly with the length, and the requirements for lathes are also higher.

[0005] Patent application number CN202220765751.2 discloses a prefabricated sandwich insulated external wall panel structure embedded part and plate-type tie part, which has high load-bearing capacity and stability. However, the inner and outer insulation materials of the tie part cannot be formed as a whole, and the insulation material needs to be pre-cut, which increases labor costs and is not convenient for widespread use. Moreover, the insulation material of the sandwich wall panel in this patent is only tied to the leaf plate by the tie part, which is prone to delamination under stress, affecting the insulation performance. The through-thread internal sleeve has strict requirements for processing precision, and the material processing cost increases significantly with the increase of the internal thread length.

[0006] Therefore, there is an urgent need for a new type of sandwich insulation wall panel with strong combination performance, low material and labor costs, and resistance to delamination under stress. Utility Model Content

[0007] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a new type of prefabricated sandwich insulated external wall panel, which improves the combinability through the combined action of split tubular tie parts and W glue, and the embedded parts ensure the connection accuracy between the external wall panel and the main structure.

[0008] This utility model provides a novel prefabricated sandwich insulated external wall panel, comprising: an inner leaf plate, an inner leaf plate CFRP reinforcement mesh, an insulation board, an outer leaf plate CFRP reinforcement mesh, an outer leaf plate, W adhesive, and separate tubular tie members; the inner leaf plate, outer leaf plate, and insulation board are bonded together with W adhesive; the sandwich insulated external wall panel is provided with multiple separate tubular tie members that penetrate the insulation board, the separate tubular tie members are anchored between the inner leaf plate and the outer leaf plate, and overlapped with the inner leaf plate CFRP reinforcement mesh through FRP short ribs; embedded parts are respectively provided at the four corners of the external wall panel, the embedded parts include an internally threaded steel sleeve that penetrates the insulation board and is anchored between the inner leaf plate and the outer leaf plate, and a high-strength screw rod, one end of the high-strength screw rod is mechanically engaged with the internally threaded steel sleeve to form an integral whole, and the other end extends out of the inner leaf plate and connects to the main structure.

[0009] Furthermore, the split tubular tie-fit component includes a tube body, a tube cap, and multiple FRP short ribs. The tube body penetrates the insulation board, and the penetration gap is filled with polyurethane foam. A double-row parallel through-hole array is provided on the interlocking end face of the tube cap and the tube body. Multiple FRP short ribs are inserted into the corresponding through holes to connect the tube cap and the tube body. The double-row FRP short ribs are staggered vertically, and the double-row FRP short ribs overlap the upper and lower parts of the inner leaf plate CFRP rib mesh, respectively.

[0010] Furthermore, both the tube body and the tube cap are molded from low thermal conductivity, high strength fiber-reinforced plastic, with the fibers distributed diagonally during the molding process.

[0011] Furthermore, the wall thickness of the pipe body and the pipe cap is 6mm-10mm; the diameter of the FRP short ribs is 8mm-10mm, and the material strength is not less than HRB335.

[0012] Furthermore, the spacing between multiple split tubular tie-fit components in the external wall panel is 250mm-650mm.

[0013] Furthermore, the embedded parts also include: a high-strength anchor plate, anchor bars, and nuts. A high-strength anchor plate is provided in both the inner and outer leaf plates. The four corners of the two high-strength anchor plates are connected by anchor bars. The internally threaded steel sleeve is welded between the two high-strength anchor plates. A through hole with the same diameter as the high-strength screw is provided at the center of the high-strength anchor plate in the inner leaf plate. The high-strength screw passes through the through hole in the inner leaf plate and extends into the internally threaded steel sleeve to engage with the internal thread. The nut engages with the thread of the high-strength screw and is then welded and fixed to the high-strength anchor plate and the high-strength screw in the inner leaf plate, respectively.

[0014] Furthermore, the thickness of the high-strength anchor plate is 8mm-16mm, and the diameter of the high-strength screw is 8mm-12mm; the strength grade of the high-strength anchor plate material is at least 8.8, and the strength grade of the high-strength screw material is at least 10.9; the anchor bar is selected from HRB400 grade hot-rolled ribbed steel bars with a diameter of 8mm or above.

[0015] Furthermore, the internally threaded steel sleeve has threads at both ends, with the internal threads at both ends having the same direction of rotation, and no threads in the middle. The unthreaded portion is no more than 1 / 3 of the length of the internally threaded steel sleeve.

[0016] This utility model discloses a novel prefabricated sandwich insulated exterior wall panel, which has the following beneficial effects:

[0017] (1) The split tubular tie member used in the external wall panel of this utility model consists of a fiber reinforced plastic tube body that bears the shear tie function, a fiber reinforced plastic tube cover that bears the overall performance, and short ribs that bear the connection function. When the inner leaf plate is poured, two rows of FRP short ribs are respectively connected to the top and bottom of the CFRP rib mesh of the inner leaf plate, which can ensure that the tie member is not easily eccentric during vibration and pouring.

[0018] (2) Using split-tube tie members with short-rib insertion connection can reduce the amount of cutting work for insulation material, enhance the integrity of the insulation layer, and reduce labor costs. After the inner leaf plate is poured, the squeezing action of the concrete inside and outside the split-tube tie members ensures the integrity of the connection.

[0019] (3) The embedded part of this utility model has a simple shape, low failure rate, large contact surface between the anchor plate and concrete, strong anchoring force, and the interlocking action between the internal threaded steel sleeve and the high-strength screw makes it have both high strength and precision, avoiding stripping under stress. The internal threaded steel sleeve adopts the form of threads at both ends and no threads in the middle, which can reduce the processing difficulty and processing cost while ensuring high-strength interlocking.

[0020] (4) In this utility model, W glue is used to form the inner and outer leaf plates and organic insulation board into a whole, which is continuously tied together, improving the combination performance, preventing stress delamination and reducing the amount of tie parts.

[0021] (5) Using CFRP mesh instead of steel mesh can reduce the heat transfer coefficient of the wall panel, improve corrosion resistance, and reduce the heavy weight of the steel mesh. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a novel prefabricated sandwich insulated exterior wall panel according to the present invention.

[0023] Figure 2 This is a schematic diagram of a split-tube tie-in component;

[0024] Figure 3 This is a schematic diagram of the installation of a split-tube tie-in component;

[0025] Figure 4 This is a schematic diagram of the embedded parts;

[0026] Figure 5 This is a schematic diagram of the installation of embedded parts.

[0027] 1-Inner blade plate, 2-Outer blade plate, 3-Insulation board, 4-Inner blade plate CFRP reinforcement mesh, 5-Pipe body, 6-Pipe cap, 7-FRP short reinforcement, 8-W glue, 9-High-strength screw, 10-High-strength anchor plate, 11-Internal threaded steel sleeve, 12-Anchor bar, 13-Nut, 14-Outer blade plate CFRP reinforcement mesh. Detailed Implementation

[0028] like Figure 1 As shown, this utility model discloses a novel prefabricated sandwich insulated exterior wall panel, comprising: an inner leaf plate 1, an insulation board 3, and an outer leaf plate 2 arranged sequentially, with the inner leaf plate 1, outer leaf plate 3, and insulation board 2 bonded together with W adhesive 8. The inner leaf plate 1 contains an inner leaf plate CFRP reinforcing mesh 4, and the outer leaf plate 2 contains an outer leaf plate CFRP reinforcing mesh 14. The sandwich insulated exterior wall panel contains multiple split-tube tie members penetrating the insulation board 3, which are anchored between the inner leaf plate 1 and outer leaf plate 2 and overlapped with the inner leaf plate reinforcing mesh 4 via FRP short bars 7. Embedded parts are set at the four corners of the sandwich insulated external wall panel. The embedded parts include an internally threaded steel sleeve 11 that penetrates the insulation board 3 and is anchored between the inner leaf plate 1 and the outer leaf plate 2, and a high-strength screw 9. One end of the high-strength screw 9 is mechanically engaged with the internally threaded steel sleeve 11 to form an integral whole, and the other end extends out of the inner leaf plate 1 to connect with the main structure.

[0029] like Figure 2 and 3 As shown, the split-tube tie-in component includes a tube body 5, a tube cap 6, and multiple FRP short ribs 7. The tube body 5 penetrates the insulation board 3, and the penetration gap is filled with polyurethane foam. A double-row parallel through-hole array is provided on the interlocking end face of the tube cap 6 and the tube body 5. The multiple FRP short ribs 7 are inserted into the corresponding through holes to connect the tube cap 6 and the tube body 5. The double-row FRP short ribs 7 are staggered vertically, and the double-row FRP short ribs 7 overlap the upper and lower parts of the inner leaf plate CFRP reinforcement mesh 4, respectively.

[0030] During construction, the outer leaf plate CFRP reinforcement mesh 14, the pipe body 5 of the split-tube tie member, and the embedded parts are first positioned. The outer leaf plate concrete is then poured and thoroughly vibrated. According to the arrangement of the pipe body 5, through grooves are pre-cut in the insulation board for the sidewalls of the pipe body 5 to pass through. Without waiting for the concrete to harden, W-adhesive is applied to both sides of the insulation board before it is laid onto the outer leaf plate concrete and a certain pressure is applied. Polyurethane foam is filled into the gaps between the pipe body 5 and the insulation board, and a protective layer is reserved. Since there is no sealed pipe cover at this stage, the insulation board can be laid normally, avoiding the previous problem of difficulty in laying the intermediate insulation layer with the sealed pipe tie member. After the insulation board 3 is laid, the pipe cover 6 is placed on top, the inner leaf plate CFRP reinforcement mesh 4 is installed, and then FRP short bars 7 are inserted into the pre-reserved through holes in the pipe body 5 and pipe cover 6, so that the double rows of CFRP reinforcement mesh 4 overlap the upper and lower parts of the inner leaf plate CFRP reinforcement mesh 4 respectively. Finally, the inner leaf plate concrete is poured, completing the construction of the precast sandwich insulated external wall panel. The split design avoids the steps of cutting insulation material when laying the insulation layer in existing closed-tube ties sandwich wall panels, ensuring the integrity of the insulation material, reducing the amount of insulation material to be cut, and lowering labor costs.

[0031] In this utility model of precast sandwich insulated exterior wall panel, the connecting components are the square tube consisting of the pipe body 5 and the pipe cover 6, and the W adhesive 8. The W adhesive 8 is suitable for bonding insulation materials to concrete. Unlike traditional bonding materials, the W adhesive 8 does not require waiting for the concrete to harden before use. After the inner leaf plate 1 is poured, the W adhesive can be applied and the insulation material can be laid. When the insulation material is in place, a certain pressure should be applied to ensure that the W adhesive and the concrete are in full contact.

[0032] Both the tube body 5 and the tube cap 6 are integrally molded from low thermal conductivity, high-strength fiber-reinforced plastic. During molding, the fibers are distributed diagonally. The wall thickness of the tube body 5 and the tube cap 6 is 6mm-10mm. The diameter of the FRP short ribs is 8mm-10mm, and the material strength is not less than HRB335. The spacing between the multiple separate tubular tie members in the external wall panel is 250mm-650mm.

[0033] like Figure 4 and 5 As shown, the embedded parts also include: a high-strength anchor plate 10, an anchor bar 12, and a nut 13. A high-strength anchor plate 10 is provided in both the inner leaf plate 1 and the outer leaf plate 2. The four corners of the two high-strength anchor plates 10 are connected by anchor bars 12. The internally threaded steel sleeve 11 is welded between the two high-strength anchor plates 10. A through hole with the same diameter as the high-strength screw 9 is provided at the center of the high-strength anchor plate 10 located in the inner leaf plate 1. The high-strength screw 9 passes through the through hole in the inner leaf plate 1 and extends into the internally threaded steel sleeve 11, engaging with the internal thread. The nut 13 engages with the thread of the high-strength screw 9 and is then welded and fixed to the high-strength anchor plate 10 and the high-strength screw 9 in the inner leaf plate 1, respectively.

[0034] Figure 5This diagram illustrates the location of embedded parts in prefabricated sandwich insulated exterior wall panels. In engineering applications, each prefabricated sandwich insulated exterior wall panel should have one embedded part at each of its four corners, and a certain distance should be reserved between each edge of the panel and the embedded part. This reserved distance is determined based on specific needs. The prefabricated sandwich insulated exterior wall panel of this invention uses embedded parts to connect to the main structure. Construction accuracy is ensured through the combination of an internally threaded steel sleeve 11 and a high-strength bolt 9. The connection between the anchor bar 12, anchor plate 10, and internally threaded steel sleeve 11 is welding. The outward extension distance of the high-strength bolt 9 can be adjusted according to actual requirements.

[0035] The high-strength anchor plate 10 has a thickness of 8mm-16mm, and the high-strength screw 9 has a diameter of 8mm-12mm. The material strength grade of the high-strength anchor plate 10 is at least 8.8, and the material strength grade of the high-strength screw 9 is at least 10.9; the anchor bar 12 is selected from HRB400 grade hot-rolled ribbed steel bars with a diameter of 8mm or above.

[0036] The internally threaded steel sleeve 11 has threads at both ends, with the internal threads at both ends having the same direction of rotation, and no threads in the middle. The unthreaded portion is no more than 1 / 3 of the length of the internally threaded steel sleeve.

[0037] This utility model of external wall panel is a novel composite sandwich insulated external wall panel integrating multiple functions such as lightweight, high strength, energy saving, fire resistance, waste utilization, durability, and decoration, composed of inner and outer leaf panels, split tubular tie-fitting components, insulation board, and W adhesive. It conforms to the development trend of prefabricated ultra-low energy consumption buildings in the construction industry. This prefabricated sandwich insulated external wall panel consists of inner and outer lightweight concrete leaf panels and an intermediate insulation board, bonded together by split tubular tie-fitting components and W adhesive to form a whole, realizing a novel composite sandwich insulated external wall panel for prefabricated ultra-low energy consumption buildings. Compared with traditional point tie-fitting components, the split tubular tie-fitting components can increase the connection area and improve the wall panel assembly. Double rows of FRP short bars are overlapped above and below the CFRP reinforcement mesh of the inner leaf panel, reducing the amount of manual binding work. The W adhesive forms the inner and outer leaf panels and the organic insulation board into a whole, continuously connecting them, improving assembly performance, preventing stress delamination, and reducing the amount of tie-fitting components used. The embedded part is anchored by mechanical engagement between a partially threaded steel sleeve and a high-strength screw, combined with welding at both ends of the sleeve. This ensures a high-strength connection between the embedded part and the frame while reducing costs and lathe precision requirements. This utility model provides a new wall panel connection method that reduces labor costs, facilitates factory production, and is conducive to achieving multi-functional integration of decoration, insulation, and low energy consumption.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel prefabricated sandwich insulated exterior wall panel, characterized in that, include: Inner leaf plate, inner leaf plate CFRP reinforcement mesh, insulation board, outer leaf plate CFRP reinforcement mesh, outer leaf plate, W adhesive and split tubular tie-fitting components; The inner leaf plate, outer leaf plate, and insulation board are bonded together with W adhesive. The sandwich insulated exterior wall panel is equipped with multiple split tubular tie members that penetrate the insulation board. The split tubular tie members are anchored between the inner leaf plate and the outer leaf plate and overlap with the CFRP reinforcement mesh of the inner leaf plate through FRP short bars. Embedded parts are set at the four corners of the exterior wall panel. The embedded parts include an internally threaded steel sleeve that penetrates the insulation board and is anchored between the inner leaf plate and the outer leaf plate, and a high-strength screw. One end of the high-strength screw is mechanically engaged with the internally threaded steel sleeve to form an integral whole, and the other end extends out of the inner leaf plate and connects to the main structure.

2. The novel prefabricated sandwich insulated exterior wall panel according to claim 1, characterized in that, The split tubular tie rod includes a tube body, a tube cap, and multiple FRP short ribs. The tube body penetrates the insulation board, and the penetration gap is filled with polyurethane foam. A double-row parallel through-hole array is provided on the interlocking end face of the tube cap and the tube body. Multiple FRP short ribs are inserted into the corresponding through holes to connect the tube cap and the tube body. The double-row FRP short ribs are staggered vertically and overlap the upper and lower parts of the inner leaf plate CFRP rib mesh, respectively.

3. The novel prefabricated sandwich insulated exterior wall panel according to claim 2, characterized in that, Both the tube body and the cap are molded from low thermal conductivity, high strength fiber-reinforced plastic, with the fibers distributed diagonally during the molding process.

4. The novel prefabricated sandwich insulated exterior wall panel according to claim 2, characterized in that, The wall thickness of the pipe body and pipe cap is 6mm-10mm; the diameter of the FRP short rib is 8mm-10mm, and the material strength is not less than HRB335.

5. The novel prefabricated sandwich insulated exterior wall panel according to claim 1, characterized in that, The spacing between multiple split tubular tie-fit components in the external wall panel is 250mm-650mm.

6. The novel prefabricated sandwich insulated exterior wall panel according to claim 1, characterized in that, The embedded parts also include: high-strength anchor plates, anchor bars, and nuts. One high-strength anchor plate is provided in the inner leaf plate and the outer leaf plate respectively. The four corners of the two high-strength anchor plates are connected by anchor bars. The internally threaded steel sleeve is welded between the two high-strength anchor plates. A through hole with the same diameter as the high-strength screw is provided at the center of the high-strength anchor plate in the inner leaf plate. The high-strength screw passes through the through hole of the inner leaf plate and extends into the internally threaded steel sleeve to engage with the internal thread. The nut engages with the thread of the high-strength screw and is then welded and fixed to the high-strength anchor plate and the high-strength screw in the inner leaf plate respectively.

7. The novel prefabricated sandwich insulated exterior wall panel according to claim 6, characterized in that, The high-strength anchor plate has a thickness of 8mm-16mm, and the high-strength screw has a diameter of 8mm-12mm; the high-strength anchor plate material strength grade is at least 8.8, and the high-strength screw material strength grade is at least 10.9; the anchor bar is selected from HRB400 grade hot-rolled ribbed steel bars with a diameter of 8mm or above.

8. The novel prefabricated sandwich insulated exterior wall panel according to claim 1, characterized in that, The internally threaded steel sleeve has threads at both ends, with the internal threads at both ends having the same direction of rotation, and no threads in the middle. The unthreaded portion is no more than 1 / 3 of the length of the internally threaded steel sleeve.

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