Curtain wall plate fastener

Abstract

The utility model relates to the technical field of building curtain walls, in particular to a curtain wall plate fastener which comprises a heat insulation material, a double-wing pressing strip and a fastening groove plate, the heat insulation material can be installed between a first curtain wall sandwich plate and a second curtain wall sandwich plate, and a wall plate gap is formed between the first curtain wall sandwich plate and the second curtain wall sandwich plate. The heat insulation material is installed on the inner side of a wallboard gap, and the double-wing pressing strip with the n-shaped section comprises a pressing strip left wing plate, a pressing strip body and a pressing strip right wing plate. The curtain wall sandwich panel is reasonable and compact in structure and convenient to use, can adapt to deformation at the gap of the sandwich panel through the double-wing pressing strip and the buckling groove plate which are made of heat insulation materials and elastic metal sheets, and is suitable for various existing curtain wall sandwich panels with or without folding edges. The utility model has the advantages of simple structure, easy disassembly and assembly, convenient construction, neat appearance, good overall appearance effect, good sealing performance, difficult aging and discoloration, long service life, no cold bridge phenomenon, safety, reliability, good durability, high efficiency and energy saving.

Description

Technical Field

[0001] The utility model relates to the technical field of building curtain walls, in particular to a curtain wall panel fastener. Background Art

[0002] With the development of the construction industry, the requirements for building envelope materials are becoming increasingly stringent. As a new type of metal composite curtain wall material, building curtain wall sandwich panels have reached a higher level in terms of aesthetics, durability, flatness, and styling, catering to market demand and coming into being. Accordingly, sealing the gaps between curtain wall sandwich panels is particularly critical. Traditional aluminum fasteners are made from a single sheet of aluminum that is cut and bent on-site. Due to the inconsistent shapes of the various parts, the overall appearance is poor and cannot meet people's aesthetic requirements for curtain walls. Existing connectors between curtain wall unit panels are mostly integral structures that are not easily deformed with changes in the gap, resulting in reduced airtightness, watertightness, and wind resistance of the curtain wall system. In order to solve the above problems, Chinese patent document with publication number CN203856087U discloses a building curtain wall sandwich panel sealing assembly, which includes a rubber strip and an insulating material, which is installed at the gap of the building curtain wall sandwich panel wall panel. The insulating material is installed on the inside of the gap. The insulating material is a foam rod or a rock wool strip. The rubber strip is installed on the outside of the gap. Through the tension of the rubber strip, it is tightly attached to the folded edge of the building curtain wall sandwich panel and can deform automatically with slight changes in the gap, thereby improving the air tightness, water tightness and wind resistance of the curtain wall system. However, for building curtain wall sandwich panels without folding edges, especially for metal curtain wall rock wool sandwich panels, since this sealing component cannot seal the junction of the metal sheet and the rock wool core material at the side ends of the sandwich panel, water is easily infiltrated into the rock wool core material at the side ends, affecting the thermal insulation performance and service life of the sandwich panel. The scope of application is relatively narrow. In addition, if this sealing component is used, the curtain wall sandwich panels on both sides and the outer ends of the rubber strip seals are not in the same plane, and the appearance is uneven. At the same time, the rubber strip seals are prone to aging and discoloration due to long-term sun and rain, which not only has a poor appearance, but also a short service life. More importantly, when the rubber strip seals are used to connect the joints, the heat transfer coefficients of the rubber and the metal sheet of the sandwich panel are quite different, and water mist will be adsorbed on the wall at the joints, that is, the cold bridge phenomenon is easily generated at the joints where the rubber strip seals are installed, which seriously affects the thermal insulation and waterproofing effects of the building curtain wall sandwich panels and greatly shortens the service life of the building curtain wall sandwich panels. Summary of the Invention

[0003] The technical problem to be solved by the present utility model is as follows: to provide a curtain wall panel fastener, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problems that the existing sandwich panel sealing component of building curtain wall cannot be used for the rock wool sandwich panel without flanging, the rock wool core material at the side end is prone to water ingress, which affects the heat preservation and service life of the sandwich panel, the outer ends of the sandwich panel and the seal are not in the same plane, affecting the appearance, and the rubber seal has problems such as short service life, poor appearance effect and easy generation of cold bridge phenomenon.

[0004] The technical solution adopted by the present utility model is as follows: a curtain wall panel fastener includes a heat-insulating material, a double-wing pressing strip and a fastening groove plate that can be installed between a first curtain wall sandwich panel and a second curtain wall sandwich panel. A wall panel gap is formed between the first curtain wall sandwich panel and the second curtain wall sandwich panel. The heat-insulating material is installed on the inner side of the wall panel gap. The double-wing pressing strip with a U-shaped cross-section includes a pressing strip left wing plate, a pressing strip body and a pressing strip right wing plate. The pressing strip left wing plate, the pressing strip body and the pressing strip right wing plate are connected as a whole. The pressing strip body is located in the wall panel gap and is fixed to the heat-insulating material by a pressing strip self-tapping screw. The left end of the pressing strip left wing plate is pressed against the outer side of the first curtain wall sandwich panel, and the right end of the pressing strip right wing plate is pressed against the outer side of the second curtain wall sandwich panel. A pressing strip middle groove with an opening forward is provided on the pressing strip body. A left limiting groove is provided in the middle of the left inner wall of the pressing strip middle groove, and a right limiting groove is provided in the middle of the right inner wall of the pressing strip middle groove. A fastening groove plate with a U-shaped cross-section is installed in the pressing strip middle groove of the double-wing pressing strip. The fastening groove plate includes a fastening groove left plate, a fastening groove front plate and a fastening groove right plate. The fastening groove left plate, the fastening groove front plate and the fastening groove right plate are connected as a whole and form a fastening groove cavity with an opening backward. A left limiting convex rib that can be matched with the left limiting groove is provided in the middle of the left side of the fastening groove left plate, and a right limiting convex rib that can be matched with the right limiting groove is provided in the middle of the right side of the fastening groove right plate. The left limiting convex rib is embedded in the left limiting groove of the double-wing pressing strip, and the right limiting convex rib is embedded in the right limiting groove of the double-wing pressing strip.

[0005] The following is a further optimization or / and improvement of the above application technical solution:

[0006] Further, as a preference, the first curtain wall sandwich panel and the second curtain wall sandwich panel are respectively fixed to the same vertical purlin by self-tapping screws. The wall panel gap is located in the middle of the front side of the vertical purlin. The inner end of the pressing strip self-tapping screw is fixed to the vertical purlin. The rear end of the pressing strip body presses against the outer side of the heat-insulating material. The screw head of the pressing strip self-tapping screw is located in the closed space formed by the pressing strip middle groove and the fastening groove plate.

[0007] Alternatively, further, as a preference, the first curtain wall sandwich panel is fixed to the first vertical purlin by first self-tapping screws, and the second curtain wall sandwich panel is fixed to the second vertical purlin by second self-tapping screws. A purlin interval is formed between the first vertical purlin and the second vertical purlin. A trimming piece is installed between the first vertical purlin and the second vertical purlin. The middle part of the trimming piece is located at the front end position of the purlin interval. The left end of the trimming piece is located between the first curtain wall sandwich panel and the first vertical purlin and is fixed by the first self-tapping screw. The right end of the trimming piece is located between the second curtain wall sandwich panel and the second vertical purlin and is fixed by the second self-tapping screw. A joint bracket is installed at the front of the wall panel gap. The cross section of the joint bracket is in a shape of a Chinese character 'ji'. The left end of the joint bracket is fixed to the right part of the front end of the first curtain wall sandwich panel by a rivet. The right end of the joint bracket is fixed to the left part of the front end of the second curtain wall sandwich panel by a rivet. The rear end of the middle part of the joint bracket presses against the outer side of the heat insulating material. An inner groove of the bracket is provided at the middle part of the joint bracket and opens forward. The width dimension of the inner groove of the bracket is larger than the width dimension of the strip body of the double-wing strip. The strip body is located in the inner groove of the bracket. The strip self-tapping screw is fixed to the joint bracket. The screw head of the strip self-tapping screw is located in the closed space formed by the strip middle groove and the buckling groove plate.

[0008] Further, as a preference, the joint bracket is a galvanized steel plate bracket, and the steel plate thickness dimension of the galvanized steel plate bracket is 1.5 millimeters to 2 millimeters.

[0009] Further, as a preference, a bonding tape is respectively fixed to the outer side of the first curtain wall sandwich panel corresponding to the left end position of the left wing plate of the strip and the outer side of the second curtain wall sandwich panel corresponding to the right end position of the right wing plate of the strip. The left end of the left wing plate of the strip is adhesively fixed to the first curtain wall sandwich panel by the bonding tape. The right end of the right wing plate of the strip is adhesively fixed to the second curtain wall sandwich panel by the bonding tape. The bonding tape is a butyl double-sided tape.

[0010] Further, as a preference, the left end of the left wing plate of the strip is provided with a left fold edge bent backward to the right, and the right end of the right wing plate of the strip is provided with a right fold edge bent backward to the left.

[0011] Further, as a preference, the cross-sectional shapes of the left limiting groove and the right limiting groove are in the shape of a single angle bracket or a round bracket or a hexagonal bracket, and the cross-sectional shapes of the left limiting rib and the right limiting rib correspond to the cross-sectional shapes of the left limiting groove and the right limiting groove; or / and, the heat insulating material is heat insulating rock wool.

[0012] The utility model has a reasonable and compact structure and is easy to use. The double-wing pressure strips and buckled groove plates made of insulation material and elastic metal sheets can adapt to the deformation of the gaps in the sandwich panels and are suitable for various existing curtain wall sandwich panels with and without folding edges. The utility model is easy to disassemble and assemble, convenient to construct, neat in appearance, good in overall appearance, good in sealing, not easy to age and discolor, long in service life, and will not produce cold bridge phenomenon. It is safe, reliable, durable, and highly efficient and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the cross-sectional structure of Example 1 and Examples 3-5 of the present invention;

[0014] Figure 2 It is a schematic cross-sectional structure diagram of Example 2 and Examples 3-5 of the present invention.

[0015] Legend: 1 is insulation material, 2 is snap-fit ​​groove plate, 3 is the first curtain wall sandwich panel, 4 is the second curtain wall sandwich panel, 5 is the wall panel gap, 6 is the left wing plate of the bead, 7 is the bead body, 8 is the right wing plate of the bead, 9 is the self-tapping screw of the bead, 10 is the middle groove of the bead, 11 is the left limiting groove, 12 is the right limiting groove, 13 is the snap-fit ​​groove cavity, 14 is the left limiting ridge, 15 is the right limiting ridge, 16 is the vertical purlin, 17 is the first self-tapping screw, 18 is the first vertical purlin, 19 is the second self-tapping screw, 20 is the second vertical purlin, 21 is the purlin spacer, 22 is the edge trimming piece, 23 is the joint bracket, 24 is the inner groove of the bracket, 25 is the left folding edge, 26 is the right folding edge, and 27 is the fitting tape. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1:

[0018] According to the instruction manual Figure 1As shown in the figure, the utility model provides a curtain wall board fastener, which includes a heat insulation material 1, a double-wing pressing strip and a fastening groove board 2 that can be installed between a first curtain wall sandwich panel 3 and a second curtain wall sandwich panel 4. A wall board gap 5 is formed between the first curtain wall sandwich panel 3 and the second curtain wall sandwich panel 4. The heat insulation material 1 is installed inside the wall board gap 5. The double-wing pressing strip with a cross-section in a shape of "J" includes a pressing strip left wing plate 6, a pressing strip body 7 and a pressing strip right wing plate 8. The pressing strip left wing plate 6, the pressing strip body 7 and the pressing strip right wing plate 8 are integrally connected. The pressing strip body 7 is located inside the wall board gap 5. The pressing strip body 7 is fixed on the heat insulation material 1 through a pressing strip self-tapping screw 9. The left end of the pressing strip left wing plate 6 presses tightly against the outer side of the first curtain wall sandwich panel 3. The right end of the pressing strip right wing plate 8 presses tightly against the outer side of the second curtain wall sandwich panel 4. A pressing strip middle groove 10 with an opening facing forward is provided on the pressing strip body 7. A left limiting groove 11 is provided in the middle of the left inner wall of the pressing strip middle groove 10. A right limiting groove 12 is provided in the middle of the right inner wall of the pressing strip middle groove 10. A fastening groove board 2 with a cross-section in a shape of "U" is installed inside the pressing strip middle groove 10 of the double-wing pressing strip. The fastening groove board 2 includes a fastening groove left board, a fastening groove front board and a fastening groove right board. The fastening groove left board, the fastening groove front board and the fastening groove right board are integrally connected and form a fastening groove cavity 13 with an opening facing backward. A left limiting convex rib 14 that can be matched with the left limiting groove 11 is provided in the middle of the left side of the fastening groove left board. A right limiting convex rib 15 that can be matched with the right limiting groove 12 is provided in the middle of the right side of the fastening groove right board. The left limiting convex rib 14 is embedded inside the left limiting groove 11 of the double-wing pressing strip. The right limiting convex rib 15 is embedded inside the right limiting groove 12 of the double-wing pressing strip.

[0019] Through the heat insulation material 1, the double-wing pressing strip and the fastening groove board 2 made of elastic metal thin plates, it can better adapt to the deformation at the wall board gap of the building curtain wall sandwich panel, and can be better applied to various existing building curtain wall sandwich panels with or without flanges, especially suitable for rock wool sandwich panels. After installation, it can better seal the joint between the metal thin plate and the rock wool core material at the side end of the sandwich panel, prevent the rock wool core material from getting water at the side end, significantly improve the heat insulation performance and service life of the sandwich panel. And the double-wing pressing strip and the fastening groove board 2 can be made into the same or similar color as the outer metal plate of the curtain wall sandwich panel, which can make the outer ends of the two side curtain wall sandwich panels and the curtain wall board fastener basically remain on the same plane, and the construction is more convenient. The color is unified and coordinated, the appearance is neat, and the overall appearance effect is good. At the same time, the air tightness, water tightness and wind resistance are good, it is not easy to age and discolor, the positioning is firm and reliable, it is easy to install and disassemble, and the service life is long. More importantly, the connection method of using the curtain wall board fastener made of metal material at the joint has the same heat transfer coefficient as the outer metal plate of the curtain wall sandwich panel, and no cold bridge phenomenon will occur at the joint, which has the characteristics of safety, reliability, beauty, simple installation, good durability and high energy efficiency.

[0020] As attached Figure 1As shown, the first curtain wall sandwich panel 3 and the second curtain wall sandwich panel 4 are respectively fixed to the same vertical purlin 16 by self-tapping screws, the wall panel gap 5 is located in the middle of the front side of the vertical purlin 16, the inner end of the beading self-tapping screw 9 is fixed to the vertical purlin 16, the rear end of the beading body 7 presses the outer side of the insulation material 1, and the screw head of the beading self-tapping screw 9 is located in the closed space formed by the beading middle groove 10 and the buckled groove plate 2. Since the outer end surface of the vertical purlin 16 can be used to close the inner end of the wall panel gap 5, and the vertical purlin 16 can also be used to drive the beading self-tapping screws 9 to fix the beading body 7, the first curtain wall sandwich panel 3 and the second curtain wall sandwich panel 4 are fixed on the same vertical purlin 16, which can simplify the construction steps and reduce construction costs. The double-wing beading can form a reliable and good seal on the outer end of the wall panel gap 5. Most importantly, it can seal the rock wool core material at the side ends of the first curtain wall sandwich panel 3 and the second curtain wall sandwich panel 4 to prevent water from entering the rock wool core material. The buckled groove plate 2 is used to protect and shield the beading self-tapping screws 9, which can not only prevent the beading self-tapping screws 9 from contacting external dew and wind and rain to slow down rust, but also achieve a beautiful decorative effect by preventing the screw heads from being exposed.

[0021] Example 2:

[0022] As attached Figure 2As shown, the difference between this embodiment and embodiment 1 is that the first curtain wall sandwich panel 3 is fixed to the first vertical purlin 18 by the first self-tapping screw 17, and the second curtain wall sandwich panel 4 is fixed to the second vertical purlin 20 by the second self-tapping screw 19. A purlin interval 21 is formed between the first vertical purlin 18 and the second vertical purlin 20. A trimming piece 22 is installed between the first vertical purlin 18 and the second vertical purlin 20. The middle part of the trimming piece 22 is located at the front end position of the purlin interval 21. The left end of the trimming piece 22 is located between the first curtain wall sandwich panel 3 and the first vertical purlin 18 and is fixed by the first self-tapping screw 17. The right end of the trimming piece 22 is located between the second curtain wall sandwich panel 4 and the second vertical purlin 20 and is fixed by the second self-tapping screw 19. The left end of the joint bracket 23 is fixed to the right front end of the first curtain wall sandwich panel 3 by rivets, and the right end of the joint bracket 23 is fixed to the left front end of the second curtain wall sandwich panel 4 by rivets. The middle and rear ends of the joint bracket 23 are pressed against the outside of the thermal insulation material 1. The middle part of the joint bracket 23 is provided with a bracket inner groove 24 opening forward. The width of the bracket inner groove 24 is greater than the width of the beading body 7 of the double-wing beading. The beading body 7 is located in the bracket inner groove 24. The beading self-tapping screws 9 are fixed to the joint bracket 23, and the screw heads of the beading self-tapping screws 9 are located in the closed space formed by the beading middle groove 10 and the buckled groove plate 2. The two ends of the joint bracket 23 are fixed to the curtain wall sandwich panel by rivets. The rivets have a diameter of 4 mm and a specification of φ4*13. The inner end of the wall panel gap 5 can be reliably and well sealed by the edge trimming piece 22. The sealing of the outer end of the wall panel gap 5 can be further strengthened by the joint bracket 23, forming a reliable and good double seal with the double-wing molding. The most important thing is that it can further cooperate with the edge trimming piece 22 to seal the rock wool core material at the side ends of the first curtain wall sandwich panel 3 and the second curtain wall sandwich panel 4 to prevent water from entering the rock wool core material. At the same time, the joint bracket 23 can also be used to drive the molding self-tapping screws 9 to fix the molding body 7, and the buckled groove plate 2 is used to protect and shield the molding self-tapping screws 9, which can not only prevent the molding self-tapping screws 9 from contacting the external dew and wind and rain to slow down rust, but also have a beautiful decorative effect by preventing the screw heads from being exposed.

[0023] Example 3:

[0024] As attached Figure 1 、 2 As shown, the difference between this embodiment and embodiments 1 and 2 is that the joint bracket 23 is a galvanized steel plate bracket with a thickness of 1.5 mm to 2 mm. The galvanized steel plate bracket is manufactured using a bending machine and has good mechanical strength and corrosion resistance, and can achieve waterproof, windproof and heat-insulating properties. It also has good elasticity and can well adapt to the deformation of the wall panel gap 5. In actual testing, it has been proven to be effective.

[0025] Example 4:

[0026] As attached Figure 1 、 2 As shown, the difference between this embodiment and embodiments 1-3 is that adhesive tape 27 is fixed to the outer side of the first curtain wall sandwich panel 3 corresponding to the left end of the beading left wing panel 6 and the outer side of the second curtain wall sandwich panel 4 corresponding to the right end of the beading right wing panel 8. The left end of the beading left wing panel 6 is bonded to the first curtain wall sandwich panel 3 by adhesive tape 27, and the right end of the beading right wing panel 8 is bonded to the second curtain wall sandwich panel 4 by adhesive tape 27. The adhesive tape 27 is a butyl double-sided tape. Butyl double-sided tape is a well-known and commonly used waterproof sealing tape for joints between medium-sized panels in municipal and construction projects. It has excellent mechanical properties and good weather resistance, corrosion resistance, adhesion, and waterproof properties.

[0027] Example 5:

[0028] As attached Figure 1 、 2 As shown, the difference between this embodiment and embodiments 1-4 is that the left end of the beading left wing panel 6 is provided with a left folded edge 25 bent toward the right rear side, and the right end of the beading right wing panel 8 is provided with a right folded edge 26 bent toward the left rear side. The end edges of the beading left wing panel 6 and the beading right wing panel 8 are cut and made, and their edges are relatively sharp, which may form cutting edges or burrs that may injure people during construction operations. By providing the left folded edge 25 and the right folded edge 26, the edges can be smoothed, making construction and use safer. Adhesive tape 27 is respectively fixed to the outside of the first curtain wall sandwich panel 3 corresponding to the position of the left folded edge 25 and the outside of the second curtain wall sandwich panel 4 corresponding to the position of the right folded edge 26. The left folded edge 25 is adhesively fixed to the first curtain wall sandwich panel 3 by the adhesive tape 27, and the right folded edge 26 is adhesively fixed to the second curtain wall sandwich panel 4 by the adhesive tape 27.

[0029] Example 6:

[0030] As attached Figure 1 、 2 As shown, the difference between this embodiment and embodiments 1-5 is that the cross-sectional shape of the left limiting groove 11 and the right limiting groove 12 is a single book title shape, a round bracket shape, or a hexagonal bracket shape, and the cross-sectional shape of the left limiting rib 14 and the right limiting rib 15 corresponds to the cross-sectional shape of the left limiting groove 11 and the right limiting groove 12. In addition, the cross-sectional shape of the left limiting groove 11 and the right limiting groove 12 can also be a combination of the above shapes. Through the cooperation of the left limiting rib 14 and the right limiting rib 15 with the left limiting groove 11 and the right limiting groove 12, the sealing performance of the left and right clamping joints of the snap-fit ​​groove plate 2 after it is embedded in the beading middle groove 10 of the double-wing beading can be improved, the positioning is more reliable and firm, and it is also easy to install and disassemble.

[0031] In addition, according to actual needs, the thermal insulation material 1 is thermal insulation rock wool. Thermal insulation rock wool can reliably fill the wallboard gap 5, and at the same time has a certain elasticity and can adapt to the deformation of the wallboard gap 5, thereby achieving thermal insulation and having high fire safety. Thermal insulation rock wool has stable physical properties, light weight, high strength, non-flammability, mothproofing, corrosion resistance, good thermal insulation, heat preservation and sound insulation performance, simple construction and good effect.

[0032] This utility model is attached with the instruction manual Figure 1 For reference purposes only, directional terms such as “upper,” “lower,” “left,” “right,” “top,” and “bottom” are used only to better and more clearly illustrate and understand the present invention, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0033] The above description is based on the preferred embodiments of the present invention, but it should not be construed as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is subject to variation. All variations made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A curtain wall panel fastener, characterized in that: It includes thermal insulation materials, double-wing beadings, and snap-in channel plates that can be installed between the first curtain wall sandwich panel and the second curtain wall sandwich panel. A wall panel gap is formed between the first curtain wall sandwich panel and the second curtain wall sandwich panel. The thermal insulation materials are installed on the inner side of the wall panel gap. The double-wing beading with a U-shaped cross-section includes a beading left wing plate, a beading body, and a beading right wing plate. The beading left wing plate, the beading body, and the beading right wing plate are integrated. The beading body is located within the wall panel gap and is fixed to the thermal insulation materials by beading self-tapping screws. The left end of the beading left wing plate is pressed against the outer side of the first curtain wall sandwich panel, and the right end of the beading right wing plate is pressed against the outer side of the second curtain wall sandwich panel. An opening-forward beading middle groove is provided on the beading body. A left limiting groove is provided in the middle of the left inner wall of the beading middle groove, and a right limiting groove is provided in the middle of the right inner wall of the beading middle groove. A snap-in channel plate with a U-shaped cross-section is installed within the beading middle groove of the double-wing beading. The snap-in channel plate includes a snap-in groove left plate, a snap-in groove front plate, and a snap-in groove right plate. The snap-in groove left plate, the snap-in groove front plate, and the snap-in groove right plate are integrated and form a snap-in groove cavity with an opening backward. A left limiting rib that can be matched with the left limiting groove is provided in the middle of the left side of the snap-in groove left plate, and a right limiting rib that can be matched with the right limiting groove is provided in the middle of the right side of the snap-in groove right plate. The left limiting rib is embedded within the left limiting groove of the double-wing beading, and the right limiting rib is embedded within the right limiting groove of the double-wing beading.

2. The curtain wall panel fastener according to claim 1, characterized in that: The first curtain wall sandwich panel and the second curtain wall sandwich panel are respectively fixed to the same vertical purlin by self-tapping screws. The wall panel gap is located in the middle of the front side of the vertical purlin. The inner end of the beading self-tapping screw is fixed to the vertical purlin. The rear end of the beading body presses against the outer side of the thermal insulation materials. The screw head of the beading self-tapping screw is located within the closed space formed by the beading middle groove and the snap-in channel plate.

3. The curtain wall panel fastener according to claim 1, characterized in that: The first curtain wall sandwich panel is fixed to the first vertical purlin by first self-tapping screws, and the second curtain wall sandwich panel is fixed to the second vertical purlin by second self-tapping screws. A purlin interval is formed between the first vertical purlin and the second vertical purlin. A trimming piece is installed between the first vertical purlin and the second vertical purlin. The middle part of the trimming piece is located at the front end position of the purlin interval. The left end of the trimming piece is located between the first curtain wall sandwich panel and the first vertical purlin and is fixed by the first self-tapping screw. The right end of the trimming piece is located between the second curtain wall sandwich panel and the second vertical purlin and is fixed by the second self-tapping screw. A joint bracket is installed at the front part of the wall panel gap. The cross-section of the joint bracket is U-shaped. The left end of the joint bracket is fixed to the right part of the front end of the first curtain wall sandwich panel by a rivet, and the right end of the joint bracket is fixed to the left part of the front end of the second curtain wall sandwich panel by a rivet. The rear end of the middle part of the joint bracket presses against the outer side of the thermal insulation materials. An opening-forward bracket inner groove is provided in the middle part of the joint bracket. The width dimension of the bracket inner groove is larger than the width dimension of the beading body of the double-wing beading. The beading body is located within the bracket inner groove, and the beading self-tapping screw is fixed to the joint bracket. The screw head of the beading self-tapping screw is located within the closed space formed by the beading middle groove and the snap-in channel plate.

4. The curtain wall panel fastener according to claim 3, characterized in that: The joint bracket is a galvanized steel plate bracket, and the steel plate thickness dimension of the galvanized steel plate bracket is 1.5 millimeters to 2 millimeters.

5. A curtain wall panel fastener according to claim 1, 2, 3 or 4, characterized in that: Bonding tapes are respectively fixed to the outside of the first curtain wall sandwich panel corresponding to the left end of the left wing panel of the beading and the outside of the second curtain wall sandwich panel corresponding to the right end of the right wing panel of the beading. The left end of the left wing panel of the beading is bonded to the first curtain wall sandwich panel by the bonding tape, and the right end of the right wing panel of the beading is bonded to the second curtain wall sandwich panel by the bonding tape. The bonding tape is a butyl double-sided tape.

6. A curtain wall panel fastener according to claim 1, 2, 3 or 4, characterized in that: The left end of the left wing plate of the layering strip is provided with a left folding edge bent toward the right rear side, and the right end of the right wing plate of the layering strip is provided with a right folding edge bent toward the left rear side.

7. The curtain wall panel fastener according to claim 5, characterized in that: The left end of the left wing plate of the layering strip is provided with a left folding edge bent toward the right rear side, and the right end of the right wing plate of the layering strip is provided with a right folding edge bent toward the left rear side.

8. The curtain wall panel fastener according to claim 1, 2, 3, 4 or 7, characterized in that: The cross-sectional shape of the left limiting groove and the right limiting groove is a single book title shape, a round bracket shape, or a hexagonal bracket shape, and the cross-sectional shape of the left limiting rib and the right limiting rib corresponds to the cross-sectional shape of the left limiting groove and the right limiting groove; or / and, the insulation material is thermal insulation rock wool.

9. The curtain wall panel fastener according to claim 5, characterized in that: The cross-sectional shape of the left limiting groove and the right limiting groove is a single book title shape, a round bracket shape, or a hexagonal bracket shape, and the cross-sectional shape of the left limiting rib and the right limiting rib corresponds to the cross-sectional shape of the left limiting groove and the right limiting groove; or / and, the insulation material is thermal insulation rock wool.

10. The curtain wall panel fastener according to claim 6, characterized in that: The cross-sectional shape of the left limiting groove and the right limiting groove is a single book title shape, a round bracket shape, or a hexagonal bracket shape, and the cross-sectional shape of the left limiting rib and the right limiting rib corresponds to the cross-sectional shape of the left limiting groove and the right limiting groove; or / and, the insulation material is thermal insulation rock wool.

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