Large acrylic window temperature stress prevention mounting node for curtain wall

Abstract

The invention relates to the technical field of building curtain walls, in particular to a large acrylic window temperature stress prevention mounting node for a curtain wall, which comprises two spliced acrylic plates, mounting grooves are formed in the splicing surfaces of the two acrylic plates, the two acrylic plates are connected through a connecting piece I embedded in the mounting grooves, and the connecting piece II is connected with the acrylic plates through a connecting piece II embedded in the mounting grooves. A displacement gap allowing the two acrylic plates to get away from or get close to each other is reserved between the first connecting piece and the mounting groove, the two acrylic plates can expand and deform, the first connecting piece is in a T shape and comprises a first strip-shaped plate and a second strip-shaped plate which are perpendicular to each other, and gaskets are arranged on the two side faces, making contact with the inner wall of the mounting groove, of the first strip-shaped plate. The displacement gaps are formed between the mounting grooves and the two end faces of the first strip-shaped plate. According to the mounting node, the upper and lower edge nodes, the left and right edge nodes and the connecting node are arranged, so that proper displacement is allowed while enough strength and rigidity are ensured, and the problem of expansion stress of a large acrylic plate under temperature change is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building curtain walls, in particular to a large acrylic window temperature stress prevention installation node for curtain walls. Background Art

[0002] In modern architecture, acrylic sheets are widely used in curtain wall fields due to their unique optical properties, weather resistance and processing performance. However, the thermal expansion coefficient of acrylic sheets is relatively high, about 7×10 -5 / ℃, which means that in an environment with large temperature changes, the acrylic sheet will undergo significant expansion and contraction deformation.

[0003] Traditional curtain wall nodes mostly use rigid fixing methods, such as the patent with publication number CN103422593A, which discloses the connection structure and connection method of acrylic panel curtain wall, including a back bolt installed at the mounting hole on the inner side of the acrylic panel, a hanger connected to the back bolt, and a back plate sandwiched between the inner side of the acrylic panel and the hanger. The back plate is provided with a through hole, and the back bolt passes through the through hole to fix the acrylic panel, the back plate and the hanger together. This method is prone to cause stress concentration at the edge of the plate when facing the thermal expansion and contraction of the acrylic plate, which in turn causes cracking or deformation. Especially for large acrylic windows (single block area ≥5㎡), the size effect makes the temperature stress problem more prominent, seriously affecting the service life and safety of the curtain wall, and increasing maintenance costs and safety risks. Summary of the invention

[0004] In order to solve the problem that the existing acrylic panels are mostly fixed rigidly, which easily leads to edge stress concentration and further causes cracking or deformation, the present invention provides a large acrylic window anti-temperature stress installation node for curtain walls. By setting the upper and lower edge nodes, the left and right edge nodes and the connecting nodes, sufficient strength and rigidity are ensured while allowing moderate displacement to solve the expansion stress problem of the large acrylic panel under temperature changes.

[0005] The present invention provides a large acrylic window temperature stress prevention installation node for curtain wall, comprising two spliced ​​acrylic panels, the spliced ​​surfaces of the two acrylic panels are provided with installation grooves, the two acrylic panels are connected by a connector 1 embedded in the installation groove, and a displacement gap is left between the connector 1 and the installation groove for the two acrylic panels to approach each other. The two acrylic panels are connected by plugging, and the displacement gap is left to effectively disperse the edge stress caused by temperature change.

[0006] Furthermore, the mounting groove has a bottom wall and two side walls, gaskets are filled between the connector 1 and the two side walls, and the connector 1 is spaced apart from the bottom wall to form a displacement gap, thereby limiting the horizontal movement of the acrylic plate and allowing a lateral displacement of ±8 mm.

[0007] Further, an expansion gap of 8 - 12 mm is left between the splicing surfaces of the two acrylic plates to prevent collision between the two acrylic plates.

[0008] Further, the first connecting member includes a first strip plate and a second strip plate that are perpendicular to each other. The first strip plate is placed in the installation grooves of the two acrylic plates, and the second strip plate extends out through the expansion gap and is connected to the external structural column. The first connecting member is a steel member for stably connecting the acrylic plate and the structural column.

[0009] Further, a second connecting member is provided on the structural column. The second strip plate is fixedly connected to the second connecting member through bolts, and a kidney-shaped hole for the displacement of the bolts is provided on the second connecting member. The bolts and the kidney-shaped hole can not only achieve the stable connection between the first connecting member and the second connecting member, but also adapt to the thermal expansion deformation of the acrylic plate for micro displacement.

[0010] Further, the second connecting member includes a bottom plate and a U-shaped plate. The second connecting member is fixedly connected to the structural column through the bottom plate, and the second strip plate extends into the U-shaped plate and can displace along the kidney-shaped hole. The U-shaped plate not only provides stable support, but also ensures that the second strip plate can freely move within the range of the kidney-shaped hole during thermal expansion and contraction, thereby effectively alleviating the influence of temperature stress on the acrylic plate.

[0011] Further, sealing plugs are provided on the two end faces in the length direction of the installation groove. The sealing plugs abut against the first strip plate and limit the first strip plate in the installation groove. The upper and lower filled sealing plugs can follow the temperature expansion and contraction deformation of the acrylic plate (such as ±10 mm vertical displacement), and maintain sealing continuity through elastic deformation, avoiding sealing failure caused by displacement.

[0012] Further, the sealing plug is cross-shaped, extends into the expansion gap, and is flush with the end face of the acrylic plate. Through the cross design in the horizontal and vertical directions, multiple sealing interfaces are formed, significantly enhancing airtightness and watertightness.

[0013] Further, U-shaped steel bars are provided at both the top and bottom of the acrylic plate. The acrylic plate is placed in the U-shaped groove of the U-shaped steel bar, and a spacer is filled between the U-shaped groove and the bottom of the acrylic plate and sealed with silicone to ensure that the bottom of the acrylic plate is fixed on three sides and prevent vertical displacement. The setting of the U-shaped steel bar ensures that the acrylic plate has sufficient strength and stability.

[0014] Further, a hollow block is filled between the end face of the U-shaped groove and the top of the acrylic plate, and a spacer is filled between the side face of the U-shaped groove and the top of the acrylic plate and sealed with silicone. The two side faces at the top of the acrylic plate are fixed, allowing the end face at the top to have a displacement of ±10 mm in the vertical direction, effectively alleviating the stress caused by temperature changes.

[0015] The beneficial effects of the present invention are as follows: The present invention provides a large acrylic window temperature stress prevention installation node for curtain wall. By reserving displacement space at the upper and lower edge nodes, the left and right edge nodes and the connection nodes of two acrylic plates, sufficient strength and stability are ensured, while the stress caused by temperature change is effectively dispersed, cracking or deformation caused by concentrated expansion stress on the splicing surface of the acrylic plates is avoided, and the service life and safety of the curtain wall are improved. In addition, the reserved displacement space ensures the free expansion and contraction of the acrylic plates when the temperature changes, and avoids structural loosening or damage caused by excessive displacement through a specific structural design. The sealing design at the node ensures the air tightness and water tightness of the curtain wall, effectively prevents rainwater leakage and air infiltration, and improves the thermal insulation performance and sound insulation effect of the curtain wall. At the same time, the installation node has a simple structure, is easy to install and maintain, and ensures the stability and safety of the acrylic window, and is suitable for various large curtain wall systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementations of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a structural diagram of the curtain wall; Figure 2 is a schematic diagram of the connector; Figure 3 It is a schematic diagram of the hollow block; Figure 4 is a schematic diagram of a sealing plug; Figure 5 It is a schematic diagram of the connection of structural columns; In the figure, 1. acrylic plate, 2. mounting groove, 3. connector 1, 31. strip plate 1, 32. strip plate 2, 33. gasket, 34. waist-shaped hole, 4. displacement gap, 5. expansion gap, 6. connector 2, 61. bolt, 62. bottom plate, 63. U-shaped plate, 7. U-shaped steel bar, 71. silicone, 8. pad, 9. hollow block, 10. structural column, 11. sealing plug. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] In order to avoid cracking or deformation caused by stress concentration at the edges of the two acrylic panels 1 during thermal expansion and contraction, a large acrylic window for curtain wall is designed to prevent temperature stress installation nodes, such as Figure 1As shown, it includes two spliced ​​acrylic plates 1, and mounting grooves 2 are correspondingly opened on the splicing surfaces of the two acrylic plates 1. The two acrylic plates 1 are connected by a connecting piece 3 embedded in the mounting groove 2. A displacement gap 4 is left between the connecting piece 3 and the mounting groove 2 for the two acrylic plates 1 to approach each other, and an expansion gap 5 of 8-12mm is left between the splicing surfaces of the two acrylic plates 1 for the deformation of the acrylic plates 1.

[0019] like Figure 2 As shown, the left and right side nodes are designed: the middle position of the side of the two acrylic plates 1 is milled to form a mounting groove 2. Preferably, the depth of the mounting groove 2 is 40 mm and the width is 10 mm. The mounting groove 2 has a bottom wall and two side walls. The spacer 33 is filled between the connector 3 and the two side walls. The connector 3 is spaced apart from the bottom wall and a displacement gap 4 is formed. A connector 3 covered with a polytetrafluoroethylene gasket 33 is inserted into the mounting groove 2. The gasket 33 is generally 2 mm thick and has good chemical corrosion resistance and self-lubricating properties. It limits the horizontal movement of the acrylic plate 1 and allows a lateral displacement gap 4 of ±8 mm. A 10 mm expansion gap 5 is reserved between the two acrylic plates 1 to prevent collision between the two acrylic plates 1.

[0020] Milling process requirements: Use high-precision five-axis equipment to mill the side of the acrylic plate 1 to ensure the accuracy of the groove depth and width, the frosted effect inside the groove, and the smooth edge without burrs, so as to ensure the smooth insertion and installation of the steel component connector 3; Steel component material and treatment: Connector 3 is made of high-strength alloy steel, and the surface is treated with anti-corrosion to improve its durability and corrosion resistance; Function and installation of gasket 33: Polytetrafluoroethylene gasket 33 has a low friction coefficient and good wear resistance. It is installed between connector 3 and acrylic plate 1 to reduce friction between the two and prevent collision between adjacent acrylic plates 1.

[0021] like Figure 3 As shown, the upper and lower edge nodes are designed: the upper and lower end faces of the acrylic plate 1 are both provided with U-shaped steel bars 7, and the U-shaped steel bars 7 have U-shaped grooves for the acrylic plate 1 to be placed, and the end faces of the U-shaped grooves are provided with sealing silicone 71. The spacer 8 is filled between the U-shaped groove and the lower end face of the acrylic plate 1, and the spacer 8 is also filled between the side of the acrylic plate 1 and the U-shaped groove. The hollow block 9 is filled between the U-shaped groove and the upper end face of the acrylic plate 1, and the spacer 8 is filled between the side of the acrylic plate 1 and the U-shaped groove. The upper and lower parts of the acrylic plate 1 are designed with U-shaped channel steel, and the spacer 8 is used at the bottom to achieve three-sided fixation, reduce the vertical displacement of the acrylic plate 1, and leave a 20mm area at the top to be filled with a flexible hollow block 9, allowing a vertical displacement of ±10mm, effectively dispersing the stress caused by temperature changes.

[0022] Material and dimensions of the U-shaped channel steel: The U-shaped steel strip 7 is made of high-strength stainless steel or carbon steel, with a thickness of 5 - 10 mm, a width 20 mm larger than the thickness of the acrylic plate 1, and a height of 80 mm to ensure sufficient strength and stability; Material and installation of the spacer block 8: The spacer block 8 is made of acrylic material and is fixed at the bottom of the U-shaped groove to ensure that the three sides at the bottom of the acrylic plate 1 are firmly fixed to prevent vertical displacement; Selection and filling of the flexible material: The hollow block 9 is made of high-quality silicone, which has good elasticity and weather resistance and is filled in the top 20 mm area, allowing the acrylic plate 1 to have a displacement of ±10 mm in the vertical direction, effectively relieving the stress caused by temperature changes.

[0023] As Figure 5 shown, design of the connection node: The first connector 3 is in a T shape. The first connector 3 includes a strip-shaped plate 1 31 and a strip-shaped plate 2 32 that are perpendicular to each other. The strip-shaped plate 1 31 is placed in the installation groove 2 of the two acrylic plates 1. The strip-shaped plate 2 32 extends out through the expansion gap 5 and is connected to the external structural column 10. Gaskets 33 are provided on both sides of the strip-shaped plate 1 31 that contacts the inner wall of the installation groove 2. The displacement gap 4 is provided between the installation groove 2 and the two end faces of the strip-shaped plate 1 31. The two acrylic plates 1 are fixedly connected to the structural column 10 through the first connector 3. A second connector 6 connected to the strip-shaped plate 2 32 of the first connector 3 is provided on the structural column 10. The strip-shaped plate 2 32 and the second connector 6 are connected by bolts 61. The second connector 6 includes a bottom plate 62 and a U-shaped plate 63. The second connector 6 is fixedly connected to the structural column 10 through the bottom plate 62. The strip-shaped plate 2 32 extends into the U-shaped plate 63 and can displace along the kidney-shaped hole 34.

[0024] The first connector 3 is connected to the U-shaped plate 63 of the second connector 6 by bolts 61, and then the bottom plate 62 of the second connector 6 is fixed on the structural column 10 to form a stable support system to ensure the safety and stability of the overall structure. The strip-shaped plate 2 32 is inserted into the U-shaped plate 63, and a kidney-shaped hole 34 is provided on the second connector 6 for the bolt 61 to move closer to or away from the structural column 10. Material and structure of the steel connector: The first connector 3 and the second connector 6 are made of high-strength steel to improve their corrosion resistance and service life, and have good load-bearing capacity and anti-deformation performance; Requirements for the connection of bolts 61: The bolts 61 are made of high-strength alloy steel. When connecting, it is necessary to ensure that the tightening torque is appropriate. The bolt holes adopt kidney-shaped holes 34, which can be adjusted by moving back and forth to adapt to the expansion deformation of the acrylic plate 1.

[0025] As Figure 4As shown, in order to ensure the sealing of the entire installation node, sealing plugs 11 are provided on both end faces of the installation groove 2 in the length direction, and the sealing plugs 11 abut against the strip plate 1 31 and restrict the strip plate 1 31 in the installation groove 2. The sealing plug 11 is cross-shaped, and the sealing plug 11 extends into the expansion gap 5, and the sealing plug 11 is flush with the end face of the acrylic plate 1. The sealing plug 11 is made of elastic material, such as rubber or silicone, to ensure that it has good sealing performance and aging resistance. During the installation process, the sealing plug 11 can not only effectively prevent moisture, dust and other impurities from entering the installation groove 2, but also adapt to the slight expansion deformation of the acrylic plate 1 caused by temperature changes through its elastic deformation, thereby maintaining the stability and sealing of the entire installation node. In addition, the cross-shaped design of the sealing plug 11 enables it to form a stable support on the two end faces of the installation groove 2, further enhancing the structural strength of the installation node.

[0026] like Figure 1-5 As shown, the installation steps of the installation node are as follows: assemble the support frame: first, build the supporting U-shaped steel bar 7 at the predetermined position to ensure that the U-shaped steel bar 7 is horizontal, vertical and stable. During the installation process, use measuring tools such as a level and a theodolite to ensure the installation accuracy of the support frame, so as to provide a good foundation for the subsequent installation of the acrylic plate 1; install the acrylic plate 1: carefully place the acrylic plate 1 into the U-shaped groove, and fix it on three sides with pads 8 at the bottom to prevent vertical displacement. Reserve 20mm space at the top and fill it with hollow blocks 9 to allow ±10mm vertical displacement. When installing the acrylic plate 1, be careful to handle it with care to avoid collision and scratches to ensure its integrity; install the connector: insert the strip plate 31 of the connector 3 with a polytetrafluoroethylene gasket 33 into the mounting groove 2 on the sides of the two acrylic plates 1 to ensure that there is a 10mm expansion gap 5 between the two acrylic plates 1. Use silica gel 71 to seal the expansion gap 5 between the strip plate 2 32 and the rear side of the acrylic plate 1, use bolts 61 to firmly connect the steel member and the structural column 10 to form a stable support system. When installing the connector, ensure that the tightening torque of the bolt 61 is uniform and the connection is firm and reliable; install the sealing plug 11: the lower sealing plug 11 is pre-placed in the middle of the U-shaped steel strip 7, and then the acrylic plate 1 is placed, and the upper sealing plug 11 is inserted after the acrylic plate 1 and the connector 3 are placed, ensuring that the sealing plug 11 is flush with the end face of the acrylic plate 1, that is, it is inserted in place; sealing treatment: finally, use high-quality sealing materials to seal the entire system, that is, apply sealing silica gel 71 in the gap between the U-shaped groove and the acrylic plate 1 to ensure good air tightness and water tightness, prevent the influence of external environmental factors on the internal structure, and the sealing material should be applied evenly and fully covered to avoid omissions and defects.

[0027] After the installation is completed, quality control and inspection are required. Material inspection: Strict quality inspection is carried out on the acrylic plate 1, steel, flexible material, polytetrafluoroethylene gasket 33, etc. used to ensure that their materials and performance meet the design requirements and relevant standards; Processing process inspection: Check the process of acrylic plate 1 processing, supporting U-shaped steel bar 7 and connecting parts production to ensure that the processing accuracy and quality meet the requirements, such as the edge smoothness of acrylic plate 1, the notch size of installation groove 2, the welding quality of steel parts, etc.; Installation quality inspection: A comprehensive inspection of the installed curtain wall system, including the installation accuracy of U-shaped steel bar 7, the fixing of acrylic plate 1, the tightness of connecting parts, the quality of sealing treatment, etc., to ensure that the installation quality of the entire system meets the design and specification requirements; Performance test: Performance test of the curtain wall system, such as airtightness, watertightness, wind pressure resistance, etc., to ensure that it meets the use requirements of the building curtain wall. Performance testing should be carried out in accordance with relevant national standards and specifications, and the test results should be recorded and analyzed in detail.

[0028] Through the unique structural design, the expansion stress problem of large acrylic windows under temperature changes is effectively solved, and the service life and safety of the curtain wall are improved. It has a broad application prospect and can be widely used in various types of building curtain wall projects, especially in places with high requirements for curtain wall performance such as high-rise buildings, commercial complexes, and transportation hubs. It can significantly improve the appearance quality and performance of the building, reduce maintenance costs and safety risks, and has significant economic and social benefits.

[0029] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A large acrylic window anti-temperature stress installation node for curtain wall, comprising two spliced ​​acrylic panels (1), characterized in that: Mounting grooves (2) are correspondingly provided on the joint surfaces of the two acrylic plates (1). The two acrylic plates (1) are connected via a connecting piece (3) embedded in the mounting groove (2). A displacement gap (4) is left between the connecting piece (3) and the mounting groove (2) to allow the two acrylic plates (1) to approach each other.

2. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 1, characterized in that: The mounting groove (2) has a bottom wall and two side walls, a gasket (33) is filled between the connecting piece 1 (3) and the two side walls, and the connecting piece 1 (3) is spaced apart from the bottom wall to form a displacement gap (4).

3. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 2, characterized in that: An expansion gap (5) of 8-12 mm is left between the joint surfaces of the two acrylic plates (1).

4. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 3, characterized in that: The connecting member 1 (3) comprises a first strip plate (31) and a second strip plate (32) which are perpendicular to each other. The first strip plate (31) is placed in the mounting groove (2) of the two acrylic plates (1), and the second strip plate (32) extends through the expansion gap (5) and is connected to the external structural column (10).

5. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 4, characterized in that: A second connecting member (6) is provided on the structural column (10), and the second strip plate (32) is fixedly connected to the second connecting member (6) by means of bolts (61). The second connecting member (6) is provided with a waist-shaped hole (34) for displacement of the bolts (61).

6. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 5, characterized in that: The second connecting member (6) comprises a bottom plate (62) and a shaped plate (63). The second connecting member (6) is fixedly connected to the structural column (10) via the bottom plate (62). The second strip plate (32) extends into the shaped plate (63) and can be displaced along the waist-shaped hole (34).

7. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 3, characterized in that: Sealing plugs (11) are provided on both end surfaces of the installation groove (2) in the length direction, and the sealing plugs (11) abut against the strip plate 1 (31) and restrict the strip plate 1 (31) within the installation groove (2).

8. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 7, characterized in that: The sealing plug (11) is cross-shaped, extends into the expansion gap (5), and is flush with the end surface of the acrylic plate (1).

9. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 1, characterized in that: U-shaped steel bars (7) are provided at the top and bottom of the acrylic plate (1), the acrylic plate (1) is placed in a U-shaped groove of the U-shaped steel bar (7), and a cushion block (8) is filled between the U-shaped groove and the bottom of the acrylic plate (1) and sealed by silica gel (71).

10. The large acrylic window anti-temperature stress installation node for curtain wall according to claim 9, characterized in that: A hollow block (9) is filled between the U-shaped groove and the end surface of the top of the acrylic plate (1), and a cushion block (8) is filled between the U-shaped groove and the side surface of the top of the acrylic plate (1) and sealed by silica gel (71).

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