A disassembly-free sound insulation enhancement structure based on an existing glass curtain wall

Abstract

The utility model relates to building curtain wall reconstruction technical field discloses a kind of exempt from disassembly sound insulation enhancement structure based on existing glass curtain wall, comprising: composite sound insulation wrapping layer, the composite sound insulation wrapping layer is attached to the original curtain wall column of existing glass curtain wall With the surface of original curtain wall beam, to be used for wrapping original beam column and blocking sound bridge transmission;Damping vibration isolation layer, the damping vibration isolation layer is arranged between composite sound insulation wrapping layer and original curtain wall column / original curtain wall beam, between special sound insulation glass and composite sound insulation wrapping layer, to be used for reducing vibration noise transmission.In the utility model, by the synergistic effect of "composite wrapping layer+special glass+damping vibration isolation+cavity", outdoor traffic noise is effectively reduced, the appearance and stability are maintained using existing curtain wall structure, the curtain wall K value can also be reduced, the adaptability is stronger and the service life is longer, and large equipment is not needed in construction.

Description

Technical Field

[0001] This utility model relates to the field of building curtain wall renovation technology, and in particular to a non-removable sound insulation enhancement structure based on existing glass curtain walls. Background Technology

[0002] With the increasing noise pollution from urban traffic, existing glass curtain wall buildings (such as office buildings, hotels, and residences) generally face the problem of insufficient sound insulation: outdoor traffic noise of 70-80dB often leads to indoor sound environment exceeding 40dB after entering the room through ordinary glass curtain walls, which cannot meet the standard of "≤35dB in areas with high sound insulation requirements" in the "Code for Sound Insulation Design of Civil Buildings" (GB50118).

[0003] In existing technologies, sound insulation improvement solutions for ordinary windows (such as replacing with double-glazed windows or adding ventilated and soundproof windows) cannot be directly applied to glass curtain walls.

[0004] 1. Glass curtain walls are mostly continuous structures of one or more sides, relying on aluminum alloy beams and columns to form an overall frame. If the original curtain wall is demolished and rebuilt, it will not only be costly and time-consuming, but will also damage the original appearance and structural stability of the building.

[0005] 2. Traditional curtain wall renovation only replaces the glass and does not address the "sound bridge" parts such as beams and columns, resulting in limited improvement in sound insulation (only a reduction of 5-8dB).

[0006] 3. Some renovation plans do not include vibration damping and isolation structures, making it easy for vibration and noise to be transmitted indoors through the metal frame. Furthermore, no effective cavity is formed, so the effect cannot be further improved through "air layer sound insulation".

[0007] Currently, there is an urgent market demand for high sound insulation retrofitting of existing glass curtain walls, but this is insufficient to balance sound insulation effect, structural safety, and aesthetic preservation. Therefore, there is an urgent need for a non-removable sound insulation enhancement structure based on existing glass curtain walls. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing a non-removable sound insulation enhancement structure based on existing glass curtain walls.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A non-removable sound insulation enhancement structure based on existing glass curtain walls, comprising:

[0011] A composite sound insulation wrapping layer is attached to the surface of the original curtain wall columns and original curtain wall beams of the existing glass curtain wall to wrap the original beams and columns and block the transmission of sound bridges.

[0012] Vibration damping and isolation layer, which is arranged between the composite sound insulation wrapping layer and the original curtain wall columns / beams, and between the special sound insulation glass and the composite sound insulation wrapping layer, in order to reduce the transmission of vibration noise;

[0013] Special soundproof glass, which is installed on the outside of the composite soundproof wrapping layer by special fixing strips to block the transmission of airborne sound;

[0014] The sound insulation sealing layer and the sound insulation cavity are provided. The sound insulation sealing layer is filled in the joints of the components to prevent sound leakage. The sound insulation cavity is formed between the original curtain wall glass and the special sound insulation glass in the existing glass curtain wall to enhance the sound insulation and heat preservation performance by utilizing the elasticity of the air layer.

[0015] Furthermore, it also includes a special damping sound insulation felt, which is fully laid on the contact surface between the composite sound insulation wrapping layer and the original curtain wall columns and beams, and the overlap is sealed to enhance the sound insulation wrapping layer's blocking effect on sound bridges; the composite sound insulation wrapping layer includes an outer metal plate and an inner damping layer, the outer metal plate can be bent to fit the cross-sectional shape of the original curtain wall columns and beams, and the inner damping layer is attached to the inside of the outer metal plate to work together with the outer metal plate to improve the sound insulation wrapping performance.

[0016] Furthermore, the vibration damping and isolation layer includes vibration damping pads and elastic vibration damping sealing strips; the vibration damping pads are set at the contact points between the original curtain wall beams and the new components to achieve localized enhanced vibration isolation and avoid rigid sound transmission; the elastic vibration damping sealing strips are pasted on the contact surfaces between the dedicated fixing strips and the dedicated soundproof glass to provide secondary vibration buffering and fill the gap between the glass and the fixing strips.

[0017] Furthermore, the outer periphery of the special soundproof glass is fitted with a customized EPDM U-shaped sealing strip, which is tightly fitted to the outer periphery of the special soundproof glass to seal the gap between the special soundproof glass and the frame and reduce vibration transmission; the special soundproof glass has a multi-layer composite laminated structure to improve airborne sound insulation.

[0018] Furthermore, the sound insulation cavity is equipped with a fully-covered active molecular sieve and a polyester fiber sound-absorbing structure; the fully-covered active molecular sieve is encapsulated in a flexible container and fixed to the bottom of the sound insulation cavity to absorb moisture in the cavity and keep the cavity dry and stable; the polyester fiber sound-absorbing structure is fixed to the surface of the fully-covered active molecular sieve by double-sided self-adhesive elastic strips to absorb residual noise in the cavity; the width of the sound insulation cavity is -mm to optimize the sound insulation and heat preservation of the air layer.

[0019] Furthermore, the dedicated fixing strip is a metal strip, which has a vibration damping groove and an elastic vibration damping component is configured in the vibration damping groove to achieve secondary vibration isolation and noise reduction while fixing the dedicated soundproof glass; the metal strip is connected to the composite soundproof wrapping layer by a machine screw, and a vibration damping washer is provided at the machine screw to avoid the formation of a sound bridge at the screw connection.

[0020] Furthermore, the sound insulation sealing layer includes structural sealant for sealing joints. The structural sealant is used to seal the joints of the composite sound insulation wrapping layer, the gaps between the edge of the special sound insulation glass and the frame, and the joints of metal components, so as to ensure the continuity of the structural seal and prevent sound leakage. The structural sealant is a neutral silicone type to achieve long-term weather resistance and sealing.

[0021] Furthermore, it also includes a metal plate cladding finish, which covers the special fixing strip, the side of the special soundproof glass, and the exposed area of ​​the composite soundproof cladding layer, and the color is consistent with the original glass curtain wall, so as to maintain the uniformity of the building's appearance and protect the internal sound insulation structure.

[0022] This utility model has the following beneficial effects:

[0023] 1. The sound insulation effect of this utility model is significant: through the synergistic effect of "composite wrapping layer (blocking sound bridge) + special glass (air sound isolation) + vibration damping and isolation (vibration noise control) + cavity (air layer sound insulation)", the indoor sound environment can stably reach 25-35dB under outdoor traffic noise of 70-80dB, which meets the high sound insulation requirements.

[0024] 2. In this utility model, the original structure is protected without dismantling: the existing beams and columns are fully utilized, the original curtain wall glass is not removed, the original appearance and structural stability of the building are preserved, and reconstruction costs are avoided.

[0025] 3. In this utility model, thermal insulation performance is also taken into account: the damping material of the sound insulation cavity and the composite wrapping layer can reduce the heat transfer coefficient K value of the curtain wall by 0.5-0.8W / (㎡·K), thereby improving the building's energy-saving effect.

[0026] 4. This utility model has strong adaptability and durability: the composite wrapping layer can be customized and bent according to the specifications of the beams and columns, the galvanized steel plate is rust-proof, the damping material is aging-resistant (service life ≥ 15 years), and it is compatible with most aluminum alloy curtain wall frames.

[0027] 5. This utility model is easy to construct: no large equipment is required, on-site splicing and installation is possible, and the construction time per square meter is ≤2 hours, without affecting the normal use of the building. Attached Figure Description

[0028] Figure 1This is a schematic diagram of a non-removable sound insulation enhancement structure based on an existing glass curtain wall proposed in this utility model.

[0029] Figure 2 This is a side sectional view of a non-removable sound insulation enhancement structure based on an existing glass curtain wall proposed in this utility model.

[0030] Legend:

[0031] 1. Existing curtain wall glass; 2. Existing curtain wall columns; 3. Special damping sound insulation felt; 4. Metal plate cladding; 5. Special soundproof glass; 6. Metal strips; 7. Machine-made screws; 8. Existing curtain wall beams; 9. Vibration damping pads; 10. Full coverage of active molecular sieves; 11. Customized EPDM U-shaped sealing strips; 12. Structural sealant for sealing joints; 13. Elastic vibration damping sealing strips; 14. Double-sided self-adhesive elastic strips; 15. Polyester fiber sound-absorbing structure. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-2 One embodiment of this utility model is a non-removable sound insulation enhancement structure based on an existing glass curtain wall, comprising:

[0034] A composite sound insulation wrapping layer is applied to the surface of the existing curtain wall columns 2 and the existing curtain wall beams 8 of the existing glass curtain wall. The composite sound insulation wrapping layer includes an outer 1.0-1.5mm galvanized steel sheet (which can be bent into shape) and an inner 2-3mm butyl rubber-based damping layer. The outer galvanized steel sheet can be bent into an L-shape or U-shape according to the cross-sectional shape of the existing curtain wall columns 2 (rectangular aluminum alloy profiles) and the existing curtain wall beams 8 (U-shaped aluminum alloy profiles). The inner damping layer is pre-applied to the inside of the outer steel sheet to wrap the existing beams and columns and block the transmission of sound bridges. The joints of the wrapping layer are sealed with sound insulation sealant.

[0035] A vibration damping and isolation layer is installed between the composite sound insulation wrapping layer and the original curtain wall columns 2 / original curtain wall beams 8, and between the special soundproof glass 5 and the composite sound insulation wrapping layer. The vibration damping and isolation layer uses 5-8mm thick EPDM rubber pads or polyurethane damping pads, and includes damping pads 9 and elastic damping sealing strips 13. The damping pads 9 are made of EPDM and are installed at the contact points between the original curtain wall beams 8 and the new components to achieve localized enhanced vibration isolation and avoid rigid sound transmission. The elastic damping sealing strip 13 has a Shore hardness of 50±5 and an aging resistance of ≥10 years. It is pasted on the contact surface between the special fixing strip and the special soundproof glass 5 to provide secondary vibration buffering and fill the gap between the glass and the fixing strip, thereby reducing the overall vibration noise transmission.

[0036] Special soundproof glass 5 is installed on the outside of the composite soundproof wrapping layer by a special fixing strip. The special soundproof glass 5 is a multi-layer laminated structure (standard specification 5+0.76PVB+6+0.76PVB+5, which can be adjusted according to needs), with an air sound insulation of ≥42dB and a single glass thickness of ≥8mm. A custom EPDM U-shaped sealing strip 11 (adapted to the glass thickness) is fitted around its outer periphery. The custom EPDM U-shaped sealing strip 11 fits tightly with the outer periphery of the special soundproof glass 5 to seal the gap between the special soundproof glass 5 and the frame and reduce vibration transmission, while blocking the transmission of airborne sound.

[0037] The sound insulation sealing layer and sound insulation cavity are filled at the joints of various components. The sound insulation sealing layer includes structural sealant 12, which is a neutral silicone type, conforming to GB16776-2005 standard, with a modulus ≤0.3MPa and weather resistance ≥20 years. It is used to seal the joints of the composite sound insulation wrapping layer (sealing width ≥5mm), the gap between the edge of the special sound insulation glass 5 and the frame (sealing width ≥8mm, thickness ≥6mm), and the joints of metal components to ensure the continuity of the structural seal and prevent sound leakage. The sound insulation cavity is formed between the existing curtain wall glass 1 and the special sound insulation glass 5 in the existing glass curtain wall. The cavity, with a width of 30–100 mm, is filled with a fully-laid active molecular sieve 10 and a polyester fiber sound-absorbing structure 15. The fully-laid active molecular sieve 10 has a particle size of 1–3 mm and a moisture absorption rate of ≤20%. It is encapsulated in a non-woven flexible container and fixed to the bottom of the sound-insulating cavity to absorb moisture and keep the cavity dry and stable. The polyester fiber sound-absorbing structure 15 is 8 mm thick, with a noise reduction coefficient NRC≥0.8 and a fire rating of B1. It is fixed to the surface of the fully-laid active molecular sieve 10 by double-sided self-adhesive elastic strips 14 to absorb residual noise in the cavity. The overall sound-insulating cavity is designed to optimize sound insulation and heat preservation performance by utilizing the elasticity of the air layer.

[0038] Reference Figures 1-2It also includes a special damping sound insulation felt 3, which is 2mm thick, has a surface density of ≥3kg / ㎡, and a flame retardant rating of B1. It is fully laid on the contact surface between the composite sound insulation wrapping layer and the original curtain wall columns 2 and the original curtain wall beams 8, and the overlap is 10mm with structural sealant (sealing width ≥5mm) to enhance the sound bridge blocking effect of the composite sound insulation wrapping layer and improve the sound insulation performance in conjunction with the composite sound insulation wrapping layer. The composite sound insulation wrapping layer includes an outer metal plate and an inner damping layer. The outer metal plate can be bent to fit the cross-sectional shape of the original curtain wall columns 2 and the original curtain wall beams 8. The inner damping layer is attached to the inside of the outer metal plate to improve the sound insulation performance in conjunction with the outer metal plate.

[0039] The vibration damping and isolation layer includes vibration damping pads 9 and elastic vibration damping sealing strips 13. Vibration damping pads 9 are set at the contact points between the original curtain wall beams 8 and the new components to achieve localized enhanced vibration isolation and avoid rigid sound transmission. Elastic vibration damping sealing strips 13 are pasted on the contact surfaces between the special fixed pressure strip and the special soundproof glass 5 to provide secondary vibration buffering and fill the gap between the glass and the pressure strip.

[0040] Among them, the special soundproof glass 5 is fitted with a customized EPDM U-shaped sealing strip 11 on its outer periphery. The customized EPDM U-shaped sealing strip 11 is tightly fitted to the outer periphery of the special soundproof glass 5 to seal the gap between the special soundproof glass 5 and the frame and reduce vibration transmission. The special soundproof glass 5 has a multi-layer composite laminated structure to improve the amount of airborne sound insulation.

[0041] The sound insulation cavity is equipped with a fully-covered active molecular sieve 10 and a polyester fiber sound-absorbing structure 15. The fully-covered active molecular sieve 10 is encapsulated in a flexible container and fixed to the bottom of the sound insulation cavity to absorb moisture and keep the cavity dry and stable. The polyester fiber sound-absorbing structure 15 is fixed to the surface of the fully-covered active molecular sieve 10 by double-sided self-adhesive elastic strips 14 to absorb residual noise in the cavity. The width of the sound insulation cavity is 30-100mm to optimize the sound insulation and heat preservation of the air layer.

[0042] The dedicated fixing strip is a metal strip 6, which is made of aluminum alloy (anodized surface), with a thick wall, a width of 50-80mm, and a dimensional deviation of ≤0.5mm. It is equipped with a vibration damping groove, in which elastic vibration damping components are configured to achieve secondary vibration isolation and noise reduction while fixing the dedicated soundproof glass 5. The metal strip 6 is connected to the composite soundproof wrapping layer by machine screws 7. The machine screws 7 are made of 304 stainless steel, with a specification of 4.2×35mm, a screwing depth of ≥15mm, and a spacing of ≤300mm (≤150mm at corners). Vibration damping washers are provided at the screws to prevent the formation of sound bridges at the screw connection points.

[0043] The sound insulation sealing layer includes structural sealant sealing joint 12, which is used to seal the joints of the composite sound insulation wrapping layer, the gap between the edge of the special sound insulation glass 5 and the frame, and the joints of metal parts, so as to ensure the continuity of the structural seal and prevent sound leakage; the structural sealant is a neutral silicone type, so as to achieve long-term weather resistance and sealing.

[0044] It also includes a metal plate cladding 4, which is 1.5 to 2.0 mm thick, with the same color as the original glass curtain wall, no scratches or deformation on the surface, and weather resistance of ≥10 years. It covers the special fixing strip, the side of the special soundproof glass 5, and the exposed area of ​​the composite soundproof cladding layer. The joints are sealed with 45° bevel joints and structural sealant 12 to maintain the uniformity of the building's appearance and protect the internal sound insulation structure.

[0045] Working principle: This structure is based on "non-removable adaptation and multi-dimensional sound insulation". First, the existing curtain wall columns 2 (rectangular aluminum alloy profiles) and existing curtain wall beams 8 (U-shaped aluminum alloy profiles) of the existing glass curtain wall are treated as a base layer. A 2mm thick special damping sound insulation felt 3 (surface density ≥3kg / ㎡) is fully laid and the overlap is sealed with a 10mm overlap. Then, a composite sound insulation wrapping layer is attached (the outer layer is 1.0~1.5mm galvanized steel plate bent into L-shaped / U-shaped to adapt to the beams and columns, and the inner layer is 2~3mm butyl rubber-based damping layer pre-attached). The splicing is sealed to block the sound bridge. Subsequently, a vibration damping and isolation layer is laid. A 5~8mm EPDM / polyurethane pad is sandwiched between the wrapping layer and the beams and columns. EPDM vibration damping pads 9 are placed at the contact points between the beams and the new components. Elastic vibration damping sealing strips 13 (Shore hardness 50±5) are attached to the contact surface between the pressure strip and the glass to reduce vibration transmission.

[0046] Next, specialized soundproof glass 5 (multi-layer laminated structure, airborne sound insulation ≥42dB, with a custom EPDM U-shaped sealing strip 11 on the outer perimeter) is installed. It is fixed to the outside of the cladding layer using aluminum alloy metal pressure strips 6 (fixed with stainless steel 304 machine screws 7 and damping washers) with vibration-damping grooves, blocking airborne sound. Simultaneously, a 30-100mm soundproof cavity is formed, containing a fully covered active molecular sieve 10 (particle size 1-3mm, moisture-absorbing and moisture-proof) encapsulated in non-woven fabric and an 8mm polyester fiber sound-absorbing structure 15 (NRC≥0.8, absorbing residual noise). The air layer optimizes sound insulation and heat preservation. Finally, neutral silicone structural sealant (compliant with GB16776-2005) is used to seal all gaps, and a 1.5-2.0mm metal plate is used to cover exposed areas to maintain appearance. All components work together to achieve a non-disassembly-free modification, reducing outdoor noise from 70-80dB to indoor noise from 25-35dB, while also lowering the curtain wall's K-value.

[0047] It is worth noting that the sealing, noise reduction and protection involved in the above embodiments are all based on the corresponding existing technologies according to the actual situation, so they will not be described in detail in the embodiments of this application.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 non-demolition sound insulation enhancement structure based on an existing glass curtain wall, characterized in that, include: A composite sound insulation wrapping layer is attached to the surface of the original curtain wall columns (2) and the original curtain wall beams (8) of the existing glass curtain wall to wrap the original beams and columns and block the transmission of sound bridges. Vibration damping and isolation layer, which is arranged between the composite sound insulation wrapping layer and the original curtain wall columns (2) / original curtain wall beams (8), and between the special sound insulation glass (5) and the composite sound insulation wrapping layer, in order to reduce the transmission of vibration noise; Special soundproof glass (5), the special soundproof glass (5) is installed on the outside of the composite soundproof wrapping layer by a special fixing strip to block the transmission of airborne sound; The sound insulation sealing layer and the sound insulation cavity are filled in the joints of each component to prevent sound leakage; the sound insulation cavity is formed between the original curtain wall glass (1) and the special sound insulation glass (5) of the existing glass curtain wall to enhance the sound insulation and heat preservation performance by utilizing the elasticity of the air layer.

2. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: It also includes a special damping sound insulation felt (3), which is fully laid on the contact surface between the composite sound insulation wrapping layer and the original curtain wall columns (2) and the original curtain wall beams (8), and the overlap is sealed to enhance the sound insulation wrapping layer’s blocking effect on the sound bridge; the composite sound insulation wrapping layer includes an outer metal plate and an inner damping layer. The outer metal plate can be bent to fit the cross-sectional shape of the original curtain wall columns (2) and the original curtain wall beams (8). The inner damping layer is attached to the inner side of the outer metal plate to work with the outer metal plate to improve the sound insulation wrapping performance.

3. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: The vibration damping and isolation layer includes vibration damping pads (9) and elastic vibration damping sealing strips (13); the vibration damping pads (9) are set at the contact points between the original curtain wall beams (8) and the new components to achieve localized enhanced vibration isolation and avoid rigid sound transmission; the elastic vibration damping sealing strips (13) are pasted on the contact surfaces between the special fixed pressure strips and the special soundproof glass (5) to provide secondary vibration buffering and fill the gap between the glass and the pressure strips.

4. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: The special soundproof glass (5) is fitted with a custom EPDM U-shaped sealing strip (11) on its outer periphery. The custom EPDM U-shaped sealing strip (11) is tightly fitted to the outer periphery of the special soundproof glass (5) to seal the gap between the special soundproof glass (5) and the frame and reduce vibration transmission. The special soundproof glass (5) is a multi-layer composite laminated structure to improve the airborne sound insulation.

5. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: The sound insulation cavity is provided with a fully-covered active molecular sieve (10) and a polyester fiber sound-absorbing structure (15); the fully-covered active molecular sieve (10) is encapsulated in a flexible container and fixed to the bottom of the sound insulation cavity to absorb moisture in the cavity and keep the cavity dry and stable; the polyester fiber sound-absorbing structure (15) is fixed to the surface of the fully-covered active molecular sieve (10) by a double-sided self-adhesive elastic strip (14) to absorb residual noise in the cavity; the width of the sound insulation cavity is 30-100mm to optimize the sound insulation and heat preservation of the air layer.

6. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: The special fixing strip is a metal strip (6). The metal strip (6) is provided with a damping groove. The damping groove is equipped with an elastic damping component to achieve secondary vibration isolation and noise reduction while fixing the special soundproof glass (5). The metal strip (6) is connected to the composite soundproof wrapping layer by a machine screw (7). The machine screw (7) is provided with a damping washer to avoid the formation of a sound bridge at the screw connection.

7. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 1, characterized in that: The sound insulation sealing layer includes structural sealant sealing joint (12), which is used to seal the joints of the composite sound insulation wrapping layer, the gap between the edge of the special sound insulation glass (5) and the frame, and the joints of metal parts, so as to ensure the continuity of the structural seal and prevent sound leakage. The structural sealant is a neutral silicone type, designed to achieve long-term weather resistance and sealing.

8. The non-demolition sound insulation enhancement structure based on the existing glass curtain wall according to claim 2, characterized in that: It also includes a metal plate cladding (4), which covers the special fixing strip, the side of the special soundproof glass (5) and the exposed area of ​​the composite soundproof cladding layer, and the color is consistent with the original glass curtain wall, so as to maintain the uniformity of the building appearance and protect the internal soundproof structure.

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