Sealing method for building curtain wall stand column joint

Abstract

The invention discloses a sealing method for a building curtain wall stand column joint. The sealing method comprises the steps that a tilting fillet is installed on a stand column of a curtain wall plate in advance; the curtain wall plates are directly pushed to be installed in place in the direction from outdoors to indoors, so that the apron flashing rubber bodies of the stand columns of the two curtain wall plates make contact with each other and are squeezed, and the apron flashing rubber strips and the stand columns define an isobaric cavity; an aluminum alloy trough plate with the inner surface provided with an anti-sticking coating is installed at the joint of the interlayer position, and a pouring cavity is defined by the aluminum alloy trough plate and the stand column; a sealant is continuously poured from an opening in the upper portion of the aluminum alloy groove plate, a sealant pouring cavity formed by the stand column groove and the U-shaped groove of the aluminum alloy groove plate is filled with the sealant by means of the self weight and fluidity of the sealant, and when it is observed that the sealant at the lower opening of the U-shaped groove continuously and stably overflows, the sealant pouring cavity in the whole interlayer is filled with the sealant. The sealing layer is connected with a visible area sealant to form a continuous sealing layer; and after the sealant is cured, the aluminum alloy groove plate is removed, the screw holes in the stand column are sealed, and stand column joint wet sealing construction is completed.

Description

Technical Field

[0001] This invention relates to a sealing method for the joints of building curtain wall columns. Background Technology

[0002] Currently, the installation of prefabricated building curtain wall unit systems is achieved through plug-in connections. This plug-in connection method is a rigid connection, and its construction and installation sequence can only be carried out sequentially in one direction. When the project construction organization plan requires that certain curtain wall sections be left uninstalled and the uninstalled curtain wall panels be installed later after the other sections are completed, the traditional plug-in connection method is extremely inconvenient for the construction and installation of these "post-installation" curtain wall sections.

[0003] Several solutions exist within the industry to address this issue, with the most common method being the elimination of the interlocking connection. During installation, adjacent panels are joined using a female-female joint, sealed with a top-down insert. This method is difficult to implement, its quality depending on the construction process and available space. Due to friction, the adhesive strip often detaches, frequently failing to complete the joint, making quality control challenging. If a wet sealant method is used, construction at interlayer locations is often impossible due to structural beams. Pre-applying sealant is typically employed, but its quality is difficult to control, leading to sealant loss during installation. Alternatively, applying sealant from the outside is problematic; however, deep joints and high-altitude work make inspection and assessment impossible, compromising airtightness and watertightness, potentially causing exterior wall leaks. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing method for the joints of building curtain wall columns that can achieve good sealing quality, so as to solve the problem that the quality of sealant filling in narrow interlayer and invisible parts cannot be reliably judged and guaranteed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sealing method for the joints of building curtain wall mullions includes the following steps:

[0007] S1: Pre-install the drip edge adhesive on the columns of the curtain wall panels;

[0008] S2: The curtain wall panels are pushed directly into place from the outside to the inside, so that the drip edge of the two curtain wall panels' columns comes into contact with each other and is squeezed, and the drip edge strip and the columns form an equal pressure cavity.

[0009] S3: At the joint between layers, an aluminum alloy channel plate with an anti-stick coating on the inner surface is installed, and the aluminum alloy channel plate and the column form a grouting cavity.

[0010] S4: Continuously inject sealant from the upper opening of the aluminum alloy channel plate, and use the self-weight and fluidity of the sealant to fill the injection cavity formed by the column groove and the U-groove of the aluminum alloy channel plate. When the sealant is observed to continuously and stably overflow from the lower opening of the U-groove, the entire interlayer injection cavity is filled with sealant and connected with the visible area sealant to form a continuous sealing layer.

[0011] S5: After the sealant has cured, remove the aluminum alloy channel plate, seal the screw holes on the column, and complete the wet sealing construction of the column joint.

[0012] The two drip edge strips installed in the slots at the front ends of the two columns are called the first drip edge strips, and the two drip edge strips installed in the slots at the rear ends of the columns are called the second drip edge strips. The first batch of drip edge strips is located on the outdoor side, and the second batch of drip edge strips is located on the indoor side. The space between the first drip edge strips and the second drip edge strips, as well as between the two columns, constitutes a pressure equalization chamber. The bottom of the pressure equalization chamber is connected to a drainage trough, and the drainage trough has an exhaust hole that communicates with the outdoor atmosphere.

[0013] For the column joints in the indoor visible area, apply sealant directly into the groove formed by the column and the second layer of adhesive strip to form a visible area sealant.

[0014] The sealant between the visible area and the layers is formed in one step using a wet-on-wet method.

[0015] Both the first and second coats of adhesive strips are co-extruded EPDM strips.

[0016] The aluminum alloy channel plate includes a U-shaped plate, with ear plates bent vertically to both sides at the two free ends of the U-shaped plate. The upper and lower ends of the two ear plates are connected to the column by self-tapping screws.

[0017] The aluminum alloy channel plate has a wall thickness of 1.5-3mm, and the non-stick coating is fluorocarbon paint or polytetrafluoroethylene film.

[0018] The groove of the aluminum alloy channel plate is the same width as the groove in the visible area.

[0019] The groove of the aluminum alloy channel plate is adjacent to and has the same width as the groove in the visible area.

[0020] The beneficial effects of this invention are:

[0021] 1. Achieved visualized control and verification of sealing quality: By using the clear physical signal of "overflowing adhesive at the bottom," the industry pain point of not being able to judge the filling status of sealant in narrow spaces is fundamentally solved, ensuring the absolute reliability of concealed works.

[0022] 2. It provides great flexibility for curtain wall construction: Due to the adoption of non-plug-in connection method and sealing method, curtain wall panels can be "post-installed", which greatly facilitates construction organization and shortens the construction period.

[0023] 3. Multiple sealing defenses have been constructed: The physical water sealing based on the principle of equal pressure chambers and continuous wet sealing have formed a composite sealing system with excellent airtightness and watertightness, far exceeding the effect of a single sealing method.

[0024] 4. Significant economic benefits: This method has a simple process, low dependence on workers' skills, reduces the risk of rework, saves labor and time costs, and has significant overall economic benefits. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of adjacent curtain wall panels according to the present invention.

[0026] Figure 2 This is a schematic diagram of the vertical structure of the curtain wall panels on the same floor.

[0027] Figure 3 This is a schematic diagram of the cross-section of the curtain wall panel joints from an indoor visible position.

[0028] Figure 4 This is a schematic diagram of the cross-section of the curtain wall panel joints between floors.

[0029] Figure 5 This is a schematic diagram of the sealing structure of the curtain wall panels at the interlayer location. Detailed Implementation

[0030] Please see Figures 1 to 5 The present invention provides a wet sealing method for the joints of building curtain wall columns, comprising the following steps:

[0031] S1: Pre-install the drip edge adhesive on the column 20 of the curtain wall panel 10. The front end of the column is the first drip edge adhesive strip 1, and the rear end of the column is the second drip edge adhesive strip 2.

[0032] S2: The curtain wall panels are pushed directly into place from the outside to the inside, so that the drip edge of the two curtain wall panels' columns comes into contact with each other and is squeezed, and the drip edge strip and the columns form an equal pressure cavity 3.

[0033] S3: At the joint between layers, an aluminum alloy channel plate 4 with an anti-stick coating on the inner surface is installed. The aluminum alloy channel plate and the column form a grouting cavity.

[0034] S4: Continuously inject sealant 5 from the upper opening of the aluminum alloy channel plate 4. Use the weight and fluidity of the sealant 5 to fill the injection cavity formed by the column groove and the U-groove of the aluminum alloy channel plate. When the sealant is observed to continuously and stably overflow from the lower opening of the U-groove, the entire interlayer injection cavity is filled with sealant and connects with the sealant 6 in the visible area to form a continuous sealing layer. Specifically, keep the upper opening of the U-groove and the visible area groove to continuously inject sealant, so that the interlayer sealant and the visible area sealant can be wet-to-wet connected and cured in one go.

[0035] S5: After the sealant has cured, remove the aluminum alloy channel plate, seal the screw holes on the column, and complete the wet sealing construction of the column joint.

[0036] Specifically, the two drip edge strips installed in the slots at the front ends of the two columns are called the first drip edge strips 1, and the two drip edge strips installed in the slots at the rear ends of the columns are called the second drip edge strips 2. The first batch of drip edge strips 1 are located on the outdoor side, and the second batch of drip edge strips are located on the indoor side. The space between the first and second drip edge strips, as well as between the two columns, constitutes a pressure equalization chamber 3. The bottom of the pressure equalization chamber is connected to a drainage trough, and the drainage trough has an exhaust hole that communicates with the outdoor atmosphere. Both the first and second drip edge strips are soft and hard co-extruded EPDM strips. These soft and hard co-extruded EPDM strips ensure that the curtain wall panels are installed smoothly while also ensuring that the strips are firmly fixed and reliably sealed when pushed in. The soft part ensures that the panels can be easily pushed in, and the flexible lip can adapt to deformation to achieve a tight seal; the hard part ensures that the strips are firmly installed in the slots and provides support for the soft part. The combination of soft and hard co-extruded EPDM strips with visible adhesive injection on aluminum alloy channels works synergistically to solve both easy installation and long-lasting sealing.

[0037] For the column joints in the visible indoor area, apply sealant 7 directly into the groove formed by the column and the second layer of adhesive strip to form a visible area sealant. The sealant between the visible area and the interlayer is formed in one step using a wet-on-wet method.

[0038] The aluminum alloy channel plate includes a U-shaped plate, with ear plates bent vertically to both sides at the two free ends of the U-shaped plate. The upper and lower ends of the two ear plates are connected to the columns by self-tapping screws. The wall thickness of the aluminum alloy channel plate is 1.5-3mm, and the non-stick coating is fluorocarbon paint or polytetrafluoroethylene film. The groove opening of the aluminum alloy channel plate is adjacent to and has the same width as the visible area recess.

[0039] This invention creatively combines three features—non-plug-in installation, pressure-equalizing chamber drainage, and U-groove visualized adhesive injection—into an organic whole system. This system generates a synergistic effect: the urgent need for "visualized interlayer sealing" arises precisely from the need for "post-installation," and is ultimately solved through the core means of this invention, thereby achieving breakthroughs in reliability, efficiency, and economy.

Claims

1. A sealing method for the joints of building curtain wall columns, characterized in that: The steps are as follows: S1: Pre-install the drip edge adhesive on the columns of the curtain wall panels; S2: The curtain wall panels are pushed directly into place from the outside to the inside, so that the drip edge of the two curtain wall panels' columns comes into contact with each other and is squeezed, and the drip edge strip and the columns form an equal pressure cavity. S3: At the joint between layers, an aluminum alloy channel plate with an anti-stick coating on the inner surface is installed, and the aluminum alloy channel plate and the column form a grouting cavity. S4: Continuously inject sealant from the upper opening of the aluminum alloy channel plate, and use the self-weight and fluidity of the sealant to fill the injection cavity formed by the column groove and the U-groove of the aluminum alloy channel plate. When the sealant is observed to continuously and stably overflow from the lower opening of the U-groove, the entire interlayer injection cavity is filled with sealant and connected with the visible area sealant to form a continuous sealing layer. S5: After the sealant has cured, remove the aluminum alloy channel plate, seal the screw holes on the column, and complete the wet sealing construction of the column joint.

2. The sealing method for the joints of building curtain wall columns as described in claim 1, characterized in that: The two drip edge strips installed in the slots at the front ends of the two columns are called the first drip edge strips, and the two drip edge strips installed in the slots at the rear ends of the columns are called the second drip edge strips. The first batch of drip edge strips is located on the outdoor side, and the second batch of drip edge strips is located on the indoor side. The space between the first drip edge strips and the second drip edge strips, as well as between the two columns, constitutes a pressure equalization chamber. The bottom of the pressure equalization chamber is connected to a drainage trough, and the drainage trough has an exhaust hole that communicates with the outdoor atmosphere.

3. A sealing method for the joints of building curtain wall columns as described in claim 1 or 2, characterized in that: For the column joints in the indoor visible area, apply sealant directly into the groove formed by the column and the second layer of adhesive strip to form a visible area sealant.

4. The sealing method for the joints of building curtain wall columns as described in claim 3, characterized in that: The sealant between the visible area and the layers is formed in one step using a wet-on-wet method.

5. A sealing method for the joints of building curtain wall columns as described in claim 2, characterized in that: Both the first and second coats of adhesive strips are co-extruded EPDM strips.

6. The sealing method for the joints of building curtain wall columns as described in claim 2, characterized in that: The aluminum alloy channel plate includes a U-shaped plate, with ear plates bent vertically to both sides at the two free ends of the U-shaped plate. The upper and lower ends of the two ear plates are connected to the column by self-tapping screws.

7. A sealing method for the joints of building curtain wall columns as described in claim 6, characterized in that: The aluminum alloy channel plate has a wall thickness of 1.5-3mm, and the non-stick coating is fluorocarbon paint or polytetrafluoroethylene film.

8. A sealing method for the joints of building curtain wall columns as described in claim 6, characterized in that: The groove of the aluminum alloy channel plate is adjacent to and has the same width as the groove in the visible area.

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