A sound insulation assembly for a drainage riser

Abstract

The utility model provides a sound insulation assembly for drainage riser is set in the outer periphery of drainage riser section crossing floor, and sound insulation assembly includes setting from inside to outside in proper order: The outside of drainage riser is configured to be set fixedly: The noise reduction cylinder body includes the inner cylinder wall and the outer cylinder wall who sets up coaxially, and the spiral flow guide baffle who is connected between the inner cylinder wall and the outer cylinder wall, and the cavity between the inner cylinder wall and the outer cylinder wall is divided into continuous spiral noise reduction cavity way by spiral flow guide baffle. The sound layer is covered in the outer cylinder wall of noise reduction cylinder body, is the sound insulation material layer, is used for absorbing the sound vibration energy that noise reduction pass body conduction comes. The support sleeve is set up in the sound absorption layer, and is configured to be fixedly embedded in the reserved hole of floor, is used for rigid connection with floor and provides support anchoring. The sound insulation assembly of the application can enhance the sound insulation effect of drainage riser between floors.

Description

Technical Field

[0001] This application relates to the field of sound insulation for drainage risers, and more specifically, to a sound insulation component for drainage risers. Background Technology

[0002] In modern architecture, bathrooms, as frequently used spaces, have become a core issue affecting residential comfort due to noise pollution. Traditional bathroom plumbing often involves direct penetration through floor slabs. When flushing, vibrations in the drainpipes cause impact noise on the floor, which is then conducted through solid structures, creating cross-floor noise pollution. This is especially problematic in high-rise buildings, where the vibrations from the drainpipes and the sound of flushing are transmitted through the floor structure, compounded by the noise from bathroom fixtures, creating a mixed sound field of 30-50 dB, severely disrupting the quiet environment of adjacent rooms. Utility Model Content

[0003] This application provides a sound insulation component for drainage risers, which can enhance the sound insulation effect between floors for drainage risers.

[0004] Specifically, this application is implemented through the following technical solution: This application provides a sound insulation component for a drainage riser, characterized in that it is disposed around the drainage riser section that penetrates the floor slab, and the sound insulation component comprises, from the inside out, the following components arranged sequentially: The noise reduction cylinder is configured to be sleeved and fixed on the outer wall of the drainage riser; the noise reduction cylinder includes an inner cylinder wall and an outer cylinder wall arranged coaxially, and a spiral flow guide baffle connected between the inner cylinder wall and the outer cylinder wall, the spiral flow guide baffle dividing the cavity between the inner cylinder wall and the outer cylinder wall into a continuous spiral noise reduction channel; The sound-absorbing layer, which covers the outer wall of the noise-reducing cylinder, is a sound-insulating material layer used to absorb the sound vibration energy transmitted from the noise-reducing cylinder. A support sleeve is fitted over the sound-absorbing layer and configured to be fixedly embedded in a reserved hole in the floor slab for rigid connection with the floor slab and to provide support and anchorage.

[0005] Optionally, the axial distance between each pair of adjacent spirals of the spiral guide baffle is the pitch value, and the pitch value in the middle of the noise reduction cylinder is greater than the pitch value at the end of the noise reduction cylinder.

[0006] Optionally, the pitch value of the spiral guide baffle decreases continuously from the middle of the noise reduction cylinder to at least one end of the noise reduction cylinder.

[0007] Optionally, the inner wall of the noise reduction cylinder is formed with a spiral groove for engaging the spiral flow guide baffle.

[0008] Optionally, the thickness of the spiral flow guide baffle increases continuously from top to bottom along the noise reduction cylinder.

[0009] Optionally, the sound-absorbing layer is a layer of polymer vibration-damping and sound-insulating material and / or a layer of sound-insulating cotton.

[0010] Optionally, the support sleeve includes an inner sleeve and a rigid waterproof sleeve from the inside out. The rigid waterproof sleeve is configured to be anchored to the concrete of the floor slab. The space between the inner sleeve and the sound-absorbing layer is filled with B1 grade polyurethane foam sealant.

[0011] Optionally, the inner sleeve is configured to be fixed inside the floor slab, and the rigid waterproof sleeve and the sound-absorbing layer extend upward to the top of the floor slab and cover the outside of the drainage riser. The rigid waterproof sleeve and the sound-absorbing layer form an annular cavity above the floor slab. The annular cavity is filled with a micro-expansion concrete layer, and the top surface of the micro-expansion concrete layer is sealed with sealant.

[0012] Optionally, the rigid waterproof sleeve located above the floor slab is surrounded by an encapsulating masonry, and a concrete waterproof platform is constructed at the bottom of the encapsulating masonry.

[0013] This application provides a noise-reducing cylinder whose spiral guide baffle can divide the cavity between the inner and outer cylinder walls into a continuous, spiraling, sealed channel. Sound waves generated by the vibration of the riser are guided into this long spiral path, thus changing the sound wave propagation path from a straight line to a long spiral. For every additional distance the sound wave travels, its energy attenuates due to air friction. Furthermore, after entering the spiral channel, the sound wave's energy is "dispersed" throughout the entire long channel. The instantaneous sound pressure peak is extended into a lower-intensity, more stable sound energy flow, homogenizing the sound energy. A sound-absorbing layer (sound insulation material layer) covers the outer wall of the noise-reducing cylinder and is typically composed of porous, loose sound insulation materials (such as centrifugal glass wool, rock wool, high-grade foam, etc.). The sound-absorbing layer allows the stable, homogenized sound waves to penetrate more fully into the material after the noise-reducing cylinder has been treated, absorbing and dissipating the sound energy through friction and viscosity. This enhances the sound insulation between floors for the drainage risers. Attached Figure Description

[0014] Figure 1 This is a schematic axial cross-sectional view of a sound insulation assembly for a drainage riser shown in an exemplary embodiment of this application; Figure 2 This is a schematic radial cross-sectional view of a sound insulation component located on a floor slab, as shown in an exemplary embodiment of this application; Figure 3This is a schematic axial cross-sectional view of a sound insulation component for a floor slab, as illustrated in an exemplary embodiment of this application. Figure 4 This is a schematic diagram of the axial cross-section of a noise-reducing cylinder shown in an exemplary embodiment of this application; Figure 5 This is a schematic radial cross-sectional view of a sound insulation component located above a floor slab, as shown in an exemplary embodiment of this application.

[0015] Among them: 100, drainage riser; 200, noise reduction cylinder; 210, inner cylinder wall; 220, outer cylinder wall; 230, spiral flow guide baffle; 240, spiral noise reduction cavity; 300, sound absorption layer; 400, support sleeve; 410, inner sleeve; 420, rigid waterproof sleeve; 421, with water-stop wing ring; 500, B1 grade polyurethane foam sealant; 600, micro-expansion concrete layer; 700, sealant cap; 800, encapsulated masonry; 900, concrete waterproof platform. Detailed Implementation

[0016] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0017] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0018] refer to Figure 1 , Figure 2 as well as Figure 3 This application provides a sound insulation component for a drainage riser 100, disposed around the periphery of the drainage riser 100 segment penetrating the floor slab. The sound insulation component includes, from the inside out, a noise-reducing cylinder 200, a sound-absorbing layer 300, and a support sleeve 400. Combined with... Figure 4The noise-reducing cylinder 200 is configured to be fitted and fixed to the outer wall of the drainage riser 100. The noise-reducing cylinder 200 includes an inner cylinder wall 210 and an outer cylinder wall 220 arranged coaxially, and a spiral flow guide baffle 230 connecting the inner cylinder wall 210 and the outer cylinder wall 220. The spiral flow guide baffle divides the cavity between the inner and outer cylinder walls 220 into continuous spiral noise-reducing channels 240. The sound-absorbing layer 300, covering the outer wall of the noise-reducing cylinder 200, is a sound-insulating material layer used to absorb the sound vibration energy transmitted from the noise-reducing cylinder 200. The support sleeve 400 is fitted over the sound-absorbing layer 300 and is configured to be fixedly embedded in a reserved hole in the floor slab for rigid connection with the floor slab and to provide support and anchorage. The support sleeve 400 is typically made of metal or rigid plastic and is cast directly into the pre-drilled holes in the floor slab, providing robust mechanical support for the entire sound insulation assembly and drainage riser 100, ensuring its stability.

[0019] For example, the loud noise generated during flushing will create noise in the drain riser 100. The noise-reducing cylinder 200, with its spiral guide baffle 230, can divide the cavity between the inner and outer cylinder walls 220 into a continuous, spiraling, sealed channel. This guides the sound waves generated by the riser's vibration into this long spiral path, transforming the sound wave propagation path from a straight line into a long spiral. For every additional distance the sound wave travels, its energy decreases due to air friction. Furthermore, once the sound wave enters the spiral channel, its energy is "dispersed" throughout the entire long channel. The instantaneous sound pressure peak is extended into a lower-intensity, more stable sound energy flow, homogenizing the sound energy.

[0020] The sound-absorbing layer 300 (sound insulation material layer) covers the outer wall 220 of the noise-reducing cylinder 200 and is typically composed of porous, loose sound insulation materials (such as centrifugal glass wool, rock wool, high-grade foam, etc.). The sound-absorbing layer 300 allows the sound energy treated by the noise-reducing cylinder 200 to penetrate more fully into the material, absorbing and dissipating the sound energy through friction and viscosity. This enhances the sound insulation effect between floors for the drainage riser 100.

[0021] In one embodiment, the axial distance between each pair of adjacent spirals of the spiral guide baffle 230 is the pitch value. The pitch value in the middle of the noise reduction cylinder 200 is greater than the pitch value at the end of the noise reduction cylinder 200. A smaller pitch means that the spiral channels are denser and more tortuous, with more bends and reflection points per unit length. The upper end of the noise reduction cylinder 200 is close to the sound source inlet (the sound source generated by the flushing of water by the upper-floor residents), and the lower end of the noise reduction cylinder 200 is close to the noise radiation outlet (directly facing the downstairs residents). After the sound waves enter the noise reduction cylinder 200 from the upper end, the dense and tortuous channels can dissipate a large amount of sound waves (such as the impact sound of water flow, hissing sound) through reflection, friction, and interference, rapidly weakening its overall energy at the "starting point" of noise propagation, reducing the burden on subsequent processing.

[0022] The pitch value at the lower end decreases again, and the channel becomes denser and more tortuous. At the end closest to the downstairs resident, the sound wave path is extended to the maximum extent, and the number of reflections and frictions is increased to ensure that the sound energy transmitted into the room is minimized.

[0023] In one embodiment, the pitch value of the spiral guide baffle 230 decreases continuously from the middle of the noise-reducing cylinder 200 to at least one end of the noise-reducing cylinder 200. Sound waves can be understood as a collection of different frequencies (high and low). A cavity of a specific size will resonate with sound waves of a specific frequency. The continuously changing pitch is equivalent to integrating multiple noise-reducing cavities targeting different frequencies, thereby achieving a better noise reduction effect.

[0024] In one embodiment, the inner wall 210 of the noise-reducing cylinder 200 has a spiral groove for engaging the spiral flow guide baffle 230. The spiral flow guide baffle 230 can be formed individually by extrusion molding, and the noise-reducing cylinder 200 can be manufactured by extrusion, or it can be manufactured separately in two halves by casting or other methods and then snapped together. The groove on the inner wall 210 of the noise-reducing cylinder 200 provides a rotating snap-fit ​​assembly method. The operator only needs to align the starting end of the spiral flow guide baffle 230 with the spiral groove on the inner wall 210, and then rotate the noise-reducing cylinder 200 or push the spiral flow guide baffle 230 to smoothly insert it along the predetermined track until it is fully installed. Once fully screwed in, a large contact surface and mechanical interlock are formed between the spiral flow guide baffle 230 and the groove, resulting in a very strong connection that can resist vibration and impact during use, ensuring the long-term stability of the structure.

[0025] In one embodiment, the thickness of the spiral baffle 230 continuously increases from top to bottom along the noise-reducing cylinder 200. Thicker baffles have higher rigidity and mass, enabling more effective suppression and dissipation of strong vibrations. Drainage noise from upper-floor residents superimposed on and accumulated with drainage noise from lower-floor residents as it propagates downwards. The top-to-bottom thickening design, placing thicker, more rigid, and more energy-dissipating baffles at the bottom where noise energy is strongest, most effectively "suppresses" and dissipates the most intense vibrations.

[0026] Combination Figure 1In one embodiment, the sound-absorbing layer 300 is a polymer vibration-damping and sound-insulating material layer and / or a sound-insulating cotton layer. The polymer vibration-damping and sound-insulating material layer not only physically isolates the rigid contact between the pipe and the concrete floor slab, but also effectively absorbs the vibration energy of the pipe through its excellent elastic deformation capacity, significantly reducing the transmission of vibration to the building structure, thus forming the first elastic isolation barrier. The main function of the sound-insulating cotton layer is sound absorption. The scheme of covering the polymer vibration-damping and sound-insulating material layer with a sound-insulating cotton layer implements multi-layered sound insulation measures to address the vibration noise generated by the drainage riser 100 itself. Specifically, in this embodiment, a polymer vibration-damping and sound-insulating sheet is first tightly wrapped around the pipe wall, utilizing its high damping characteristics to absorb and convert the vibration energy of the pipe wall, suppressing the resonance amplitude. Then, a high-efficiency sound-insulating cotton layer is tightly wrapped around the outer layer, whose numerous closed-cell structures effectively block the path of sound waves propagating through the air inside the material. The combination of the two layers forms a dual barrier of "damping energy absorption + closed-cell sound insulation." The polymer damping and sound-insulating material layer can specifically be butyl rubber damping sheets, composite damping materials, etc. The sound-insulating cotton layer can be rock wool or mineral wool, etc.

[0027] Combination Figure 1 and Figure 2 In one embodiment, the support sleeve 400 includes, from the inside out, an inner sleeve 410 and a rigid waterproof sleeve 420. The rigid waterproof sleeve 420 is configured to be anchored to the concrete floor slab. A B1-grade polyurethane foam sealant 500 is filled between the inner sleeve 410 and the sound-absorbing layer 300. The rigid waterproof sleeve 420, as the main structural component, is rigidly anchored to the concrete floor slab, providing a robust support base. The inner sleeve 410 is flexibly connected to the inner sound-absorbing layer 300 via a Class B1 polyurethane foam sealant 500. The polyurethane foam itself has excellent water repellency and elasticity, perfectly filling all irregular gaps between the inner sleeve 410 and the sound-absorbing layer 300, forming the first flexible waterproof sealing layer. The rigid waterproof sleeve 420, typically equipped with a water-stop wing ring 421, is cast into concrete, forming an integral, high-strength rigid waterproof barrier with the floor slab, preventing water from seeping along the interface between the pipe wall and the concrete. The polyurethane foam is a liquid material injected on-site; after expansion, it automatically adapts to and tightly fills complex shapes and irregular gaps. The Class B1 fire rating ensures the safety of this material used inside buildings, meeting fire safety regulations.

[0028] Combination Figure 1 and Figure 5In one embodiment, the inner sleeve 410 is configured to be fixed inside the floor slab, and the rigid waterproof sleeve 420 and the sound-absorbing layer 300 extend upwards to the top of the floor slab and cover the outside of the drainage riser 100. The rigid waterproof sleeve 420 and the sound-absorbing layer 300 form an annular cavity above the floor slab, and a micro-expansion concrete layer 600 is poured into the annular cavity. The top surface of the micro-expansion concrete layer 600 is sealed with sealant 700. As a high-quality sealant, the micro-expansion concrete layer 600 has a high density and heavy weight, which can effectively block any airborne sound leakage from the lower gaps. The sealant 700 ensures an elastic seal on the top surface, compensating for any minor gaps that may be caused by concrete drying shrinkage and structural deformation.

[0029] In one embodiment, the rigid waterproof sleeve 420 located above the floor slab is surrounded by an encapsulating masonry 800, with a concrete waterproof platform 900 at the bottom of the encapsulating masonry 800. During the masonry process, a special sound-insulating mortar layer is applied to the inner side (facing the pipe) as the masonry is constructed. This layer further blocks solid-borne sound transmission and increases the mass of sound wave isolation. Simultaneously, it is ensured that the sleeve's reserved height exceeds the finished floor slab surface by at least 50mm, and a concrete water-stop platform is installed at the outer root. This structural system significantly improves the noise insulation capability of the drainage riser 100 while greatly enhancing the waterproof sealing of the pipe root area, a high-risk leakage zone. The brick or block masonry enclosure forms a robust "protective shell," effectively preventing the internal sound insulation layer and rigid waterproof sleeve 420 from accidental impacts, damage, or corrosion during subsequent decoration and use, thus ensuring the system's lifespan.

[0030] The construction method of the sound insulation component of this application can be as follows: Step 1: Pre-embed and fix a rigid waterproof sleeve 420 with a water-stop wing ring 421, and then pour and cure the floor slab concrete. Step 2: Install an inner sleeve 410 on the rigid waterproof sleeve 420. Step 3: Fit and fix the noise reduction cylinder 200 to the outer wall of the drainage riser 100, and then wrap the outside of the noise reduction cylinder 200 with polymer vibration damping and sound insulation cotton to form a composite sound-absorbing lining. Step 4: Use B1 grade polyurethane foam sealant 500 to elastically fill and seal the annular gap between the inner sleeve 410 and the composite sound-absorbing lining. Step 5: Pour micro-expansion fine stone waterproof concrete into the annular cavity above the floor slab between the rigid waterproof sleeve 420 and the composite sound-absorbing lining and cure it to form a rigid seal. Step 6: Use building sealant to flexibly seal the top surface of the micro-expansion fine stone waterproof concrete layer. Step 7: Encapsulate the rigid waterproof sleeve 420 with C20 fine aggregate concrete. Step 8: Construct an encapsulating masonry 800 with a concrete waterproof platform 900 at the bottom on the finished floor slab surface to enclose the entire component, forming the final protective and decorative layer.

[0031] In this application, the spiral flow-guiding structure of the noise-reducing cylinder 200 effectively extends and interferes with the sound wave propagation path. The drainage riser 100 is wrapped with polymer vibration-damping and sound-insulating damping sheets and sound-insulating cotton. The polymer damping sheets convert pipe vibration energy into heat energy, reducing solid-borne sound transmission such as water flow impacting the pipe wall and pipe resonance. The damping sheets + sound-insulating cotton can cover the sound frequency range of 20~5000Hz, increasing the overall noise reduction to 25~35dB. Alternatively, HDPE silent drainage pipes can be used. By adding modified materials to optimize density, they can absorb more than 90% of the energy in the audible sound frequency range. Measured noise levels are 1-2 decibels lower than cast iron pipes, and nighttime residential drainage noise can be reduced to below 48 decibels.

[0032] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A sound insulation component for a drainage riser, characterized in that, The sound insulation component, located around the drainage riser (100) section that penetrates the floor slab, comprises, arranged sequentially from the inside out: The noise-reducing cylinder (200) is configured to be sleeved and fixed on the outside of the drainage riser (100); the noise-reducing cylinder (200) includes an inner cylinder wall (210) and an outer cylinder wall (220) arranged coaxially, and a spiral flow guide baffle (230) connecting the inner cylinder wall (210) and the outer cylinder wall (220), the spiral flow guide baffle (230) dividing the cavity between the inner cylinder wall (210) and the outer cylinder wall (220) into a continuous spiral noise-reducing channel (240). The sound-absorbing layer (300), which covers the outer cylinder wall (220) of the noise-reducing cylinder (200), is a sound-insulating material layer used to absorb the sound vibration energy transmitted from the noise-reducing cylinder; A support sleeve (400) is fitted over the sound-absorbing layer (300) and configured to be fixedly embedded in a reserved hole in the floor slab for rigid connection with the floor slab and to provide support and anchorage.

2. The sound insulation component for a drainage riser as described in claim 1, characterized in that, The axial distance between each pair of adjacent spirals of the spiral guide baffle (230) is the pitch value. The pitch value in the middle of the noise reduction cylinder (200) is greater than the pitch value at the end of the noise reduction cylinder (200).

3. The sound insulation component for a drainage riser as described in claim 2, characterized in that, The pitch value of the spiral guide baffle (230) decreases continuously from the middle of the noise reduction cylinder (200) to at least one end of the noise reduction cylinder (200).

4. The sound insulation component for a drainage riser as described in claim 1, characterized in that, The inner wall (210) of the noise reduction cylinder (200) is formed with a spiral groove for engaging the spiral flow guide baffle (230).

5. The sound insulation assembly for a drainage riser as described in claim 1, characterized in that, Along the top-to-bottom direction of the noise-reducing cylinder (200), the thickness of the spiral flow guide baffle (230) increases continuously.

6. The sound insulation assembly for a drainage riser as described in claim 1, characterized in that, The sound-absorbing layer (300) is a layer of polymer vibration damping and sound insulation material and / or a layer of sound insulation cotton.

7. The sound insulation assembly for a drainage riser as described in claim 1, characterized in that, The support sleeve (400) includes an inner sleeve (410) and a rigid waterproof sleeve (420) from the inside out. The rigid waterproof sleeve (420) is configured to be anchored to the concrete of the floor slab. The space between the inner sleeve (410) and the sound-absorbing layer (300) is filled with B1 grade polyurethane foam sealant (500).

8. The sound insulation assembly for a drainage riser as described in claim 7, characterized in that, The inner sleeve (410) is configured to be fixed inside the floor slab, and the rigid waterproof sleeve (420) and the sound-absorbing layer (300) extend upward to the top of the floor slab and cover the outside of the drainage riser (100). The rigid waterproof sleeve (420) and the sound-absorbing layer (300) form an annular cavity above the floor slab. The annular cavity is filled with a micro-expansion concrete layer (600), and the top surface of the micro-expansion concrete layer (600) is sealed with sealant (700).

9. The sound insulation assembly for a drainage riser as described in claim 8, characterized in that, The rigid waterproof sleeve (420) located above the floor slab is surrounded by an enclosing masonry (800), and a concrete waterproof platform (900) is constructed at the bottom of the enclosing masonry (800).

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