High-efficiency noise-reduction HDPE (high-density polyethylene) building drainage pipeline system

Abstract

The invention discloses an efficient noise reduction HDPE building drainage pipeline system which comprises a pipe body, a connecting structure and a functional assembly. The pipe body is of a six-layer composite structure, the inner layer is a 55-degree spiral flow guide rib and micro-nano hydrophobic layer, the middle layer is a nano modified HDPE main pressure bearing layer and a foaming damping noise reduction layer, and the outer layer is a reinforced fiber layer and a honeycomb noise reduction structure. The connecting structure adopts a double-sealing socket and spigot joint, and a stepped flow guide ring is embedded; the functional assembly comprises a variable-diameter flow guide plate, a rotary scraper and a high-pressure flushing system. Through multi-dimensional collaborative design, the ring stiffness is larger than or equal to 18 kN / m < 2 >, the axial compressive strength is larger than or equal to 9 MPa, the drainage noise is smaller than or equal to 40 dB (A is weighted), and the sediment self-cleaning rate is larger than or equal to 99%. Experiments show that the system can treat sewage containing solid particles of 8 mm under the pipe diameter of DN150, and no leakage is caused when the system is impacted by a water hammer under the pressure of 1.5 MPa. The technical problems that a traditional pipeline is insufficient in strength, excessive in noise and prone to blockage are solved, and the comprehensive performance reaches the international advanced level.

Description

Technical Field

[0001] The present invention relates to the technical field of building drainage pipes, and in particular to a high-efficiency noise-reducing HDPE building drainage pipe system. Background Art

[0002] HDPE building drainage pipes are high-density polyethylene drainage pipes used in construction. Several HDPE drainage pipes can form a building drainage pipe system. Existing HDPE building drainage pipes have the following defects:

[0003] Insufficient mechanical properties: The ring stiffness of ordinary HDPE pipes is generally less than 8kN / m 2 (GB / T19472.2-2017), high-rise buildings are prone to deformation due to water hammer impact and deadweight. In practice, the strength can be improved by thickening the pipe wall, but the material cost increases by 30%, and the drainage efficiency also decreases accordingly;

[0004] The compression rate of traditional socket connection sealing ring is insufficient (<25%), which is prone to leakage after long-term use. Although flange connection enhances sealing, the construction is complicated.

[0005] Noise control limitations: The smooth inner wall of traditional pipes is prone to water impact noise, with peak values reaching 55-60dB (GB50118-2010). While the corrugated structure reduces high-frequency noise, it exacerbates low-frequency noise.

[0006] The long-term vibration isolation efficiency of the rubber vibration isolation pads used in the pipeline is reduced to 40%, and there is a fire hazard;

[0007] Covering with sound-absorbing materials increases the pipe diameter and poses a fire hazard (oxygen index <22%);

[0008] Poor anti-clogging ability: Existing technology relies on increasing the pipe diameter (such as DN110→DN160), resulting in wasted space. The spiral guide design is easily entangled by fibers, and the annual blockage rate exceeds the standard by 2-3 times.

[0009] Technical bottleneck: A single performance optimization solution is difficult to meet the comprehensive requirements of modern buildings for drainage systems. Specifically, it is difficult to strike a balance between high-intensity, efficient noise reduction, and cost control. This leads to safety risks in the drainage systems of high-rise buildings. Noise levels in hospitals, hotels, and other places generally exceed standards (measured at 55-60dB). Therefore, we propose a synergistic solution that integrates high intensity, high noise reduction, and long-term anti-blocking. Summary of the Invention

[0010] The purpose of the present invention is to solve the shortcomings of the existing technology and propose a high-efficiency noise-reducing HDPE building drainage pipe system. Through composite structure design and multi-stage noise reduction technology, it breaks through the technical bottleneck raised by the above-mentioned background technology and realizes the high strength, high noise reduction and anti-clogging of HDPE building drainage pipes.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A high-efficiency noise-reducing HDPE building drainage pipe system, comprising:

[0013] The pipe body is a five-layer composite structure consisting of a spiral composite layer, a hydrophobic layer, a nano-modified HDPE main pressure-bearing layer, a foamed damping layer, a honeycomb sound-absorbing layer, and a reinforced fiber layer from the inside out.

[0014] The connection structure includes a socket joint, a conical guide ring and a stepped guide ring. The socket joint is equipped with a double-bevel sealing ring and a sound-absorbing cotton filling groove;

[0015] Functional components include variable diameter guide plates and double-layer vibration isolation brackets.

[0016] As a further embodiment of the present invention, the spiral composite layer has a spiral angle of 55-60°, a rib height of 2-3 mm, a rib spacing of 8-15 mm, and a micropore array (pore diameter 0.5-1 mm, porosity 15-20%).

[0017] As a further embodiment of the present invention, the hydrophobic layer is composed of 85-92% HDPE matrix, 5-10% fluorosilane-modified nano-SiO2 (particle size 15-30nm), and 3-5% PTFE micropowder, and the surface contact angle is ≥118°.

[0018] As a further embodiment of the present invention, the nano-modified HDPE main pressure-bearing layer contains 88-95% HDPE resin matrix, 3-8% nano-silicon dioxide, and 0.5-1.5% antioxidant by weight, and has a tensile strength of ≥29 MPa (ASTM D638).

[0019] As a further embodiment of the present invention, the honeycomb sound-absorbing layer is composed of regular hexagonal units with a side length of 4-6 mm, a wall thickness of 0.3-0.5 mm, and an insertion loss of ≥8 dB (impedance tube method test).

[0020] As a further embodiment of the present invention, the reinforcing fiber layer is a silane-treated glass / carbon fiber mixed mesh with a fiber volume content of 35-45% and a ring stiffness of ≥18.5 kN / m 2 (GB / T9647).

[0021] As a further improvement in the solution of the present invention, the tapered guide ring has a taper of 1:5-1:8, the stepped guide ring has three levels of drop (the height of each level is 1 / 20-1 / 15 of the pipe diameter), and the curvature radius of the guide surface is R=2D.

[0022] As a further improvement in the solution of the present invention, the variable diameter guide plate has an inclination angle of 25-35 degrees, a 0.5-1.0 mm micro-protrusion array is provided on the plate surface, and the critical sedimentation particle size is ≥4.0 mm (sedimentation experiment).

[0023] As a further embodiment of the present invention, the double-layer vibration isolation bracket comprises an inner layer of high-damping NR rubber (loss factor ≥ 0.3) and an outer layer of CR rubber (oxygen index ≥ 28%), with a total thickness of 10-15 mm.

[0024] As a further embodiment of the present invention, the micropore array is distributed in a gradient along the water flow direction (aperture 0.8 mm at the inlet → 0.5 mm at the outlet), and the noise attenuation of 800-1200 Hz is ≥10 dB.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Excellent comprehensive performance: ring stiffness ≥18kN / m 2 , noise ≤ 40dB, self-cleaning rate ≥ 99%, breaking through the limitations of single performance.

[0027] Long life and low cost: The corrosion resistance of the material is increased by 5 times, the maintenance cycle is extended to 18 months, and the overall cost is reduced by 35%.

[0028] Safe and environmentally friendly: The flame retardant protective layer has an oxygen index of ≥32%, and the nano-silver coating inhibits bacterial growth, meeting green building standards.

[0029] Convenient construction: The modular connection structure improves construction efficiency by 40%, meeting the rapid installation requirements of super-high-rise buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a high-efficiency noise-reducing HDPE building drainage pipe system proposed by the present invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the structure of a high-efficiency noise-reducing HDPE building drainage pipe system proposed by the present invention. Figure 2 ;

[0032] Figure 3 This is a cross-sectional view of the pipe body in the high-efficiency noise reduction HDPE building drainage pipe system proposed by the present invention;

[0033] Figure 4 for Figure 3 Schematic diagram of the structure of the connection structure and functional components;

[0034] Figure 5 This is a cross-sectional layered diagram of the pipe body in the high-efficiency noise-reducing HDPE building drainage pipe system proposed by the present invention.

[0035] In the figure: 100, pipe body; 110, spiral composite layer; 120, hydrophobic layer; 130, nano-modified HDPE main pressure-bearing layer; 140, foamed damping layer; 150, honeycomb sound-absorbing layer; 160, reinforced fiber layer; 200, connection structure; 210, socket joint; 211, double-bevel sealing ring; 212, sound-absorbing cotton filling groove; 220, conical guide ring; 230, stepped guide ring; 300, functional component; 310, guide plate; 320, vibration isolation bracket. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly defined.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1-5 , a high-efficiency noise-reducing HDPE building drainage pipe system, comprising:

[0041] The pipe body 100 has a five-layer composite structure consisting of a spiral composite layer 110, a hydrophobic layer 120, a nano-modified HDPE main pressure-bearing layer 130, a foamed damping layer 140, a honeycomb sound-absorbing layer 150, and a reinforced fiber layer 160 from the inside to the outside.

[0042] The spiral composite layer 110 has a helix angle of 55-60°, which optimizes the hoop stress distribution. Finite element analysis shows that the deformation is reduced by 42%-50%. The rib height is 2-3mm, the rib spacing is 8-15mm, and the ribs are provided with a microporous array (aperture 0.5-1mm, porosity 15-20%). The helix angle and the microporous array simultaneously improve the hoop stiffness (≥16kN / m 2 ) and noise attenuation efficiency (high frequency noise reduction by 10dB);

[0043] The micropore array is gradiently distributed along the water flow direction (aperture 0.8mm at the inlet → 0.5mm at the outlet), and the noise attenuation is ≥10dB for 800-1200Hz.

[0044] The hydrophobic layer 120 is composed of 85-92% HDPE matrix, 5-10% fluorosilane-modified nano-SiO2 (particle size 15-30nm), and 3-5% PTFE micropowder, with a surface contact angle of ≥118°;

[0045] The nano-modified HDPE main pressure-bearing layer 130 contains, by weight, 88-95% of HDPE resin matrix, 3-8% of nano-silicon dioxide, and 0.5-1.5% of antioxidant, with a tensile strength of ≥29 MPa (ASTM D638) and a melt flow rate of 8 g / 10 min.

[0046] The foam damping layer 140 is a closed-cell foam structure, which can be an EVA / rubber particle closed-cell foam (density 0.25-0.4g / cm 3 ), the thickness accounts for 15-20% of the tube wall, can absorb 200-500Hz vibration energy, and reduce the acceleration level by 12dB;

[0047] The honeycomb sound-absorbing layer 150 is composed of regular hexagonal units with a hexagonal honeycomb structure, a side length of 4-6 mm, and a wall thickness of 0.3-0.5 mm, which increases the acoustic impedance and has an insertion loss of ≥8 dB in the 200-500 Hz frequency band (impedance tube method test);

[0048] The reinforcing fiber layer 160 is a silane-treated glass / carbon fiber mixed mesh (surface density 300-500g / m 2 ), fiber volume content 35-45%, interlaminar shear strength ≥15MPa, ring stiffness ≥18.5kN / m 2 (GB / T 9647);

[0049] A protective layer may be further provided on the outer layer of the reinforced fiber layer 160. The protective layer is added with 3-5% nano-TiO2 and 2% aluminum hydroxide flame retardant, and the tensile strength retention rate after 5000 hours of ultraviolet aging is ≥90%.

[0050] The protective layer on the outer surface of the pipe can also be provided with an upper annular reinforcement rib (not shown in the figure), the rib height is 3-5mm, the spacing is 50-80mm, and the compressive deformation is less than 2% (10 tons load test)

[0051] The connection structure 200 includes a socket joint 210, a tapered guide ring 220, and a stepped guide ring 230. The socket joint 210 is provided with a double-beveled sealing ring 211 and a sound-absorbing cotton filling groove 212. The design of the double-beveled sealing ring 211 results in a sealing ring compression rate of 35-45%, a taper ratio of 1:5, a socket depth L = 0.5D ± 5mm, a leakage rate of ≤ 0.005 times / km / year, and a 40% increase in deformation resistance.

[0052] The conical guide ring 220 and the stepped guide ring 230 are arranged in the pipe body 100. The conical guide ring 220 is a key component of the connection structure 200 and is located inside the socket joint 210. Its inner wall has a specific taper (1:5 to 1:8) and a surface roughness Ra ≤ 0.8 μm.

[0053] The functions of the conical guide ring 220 are: ① Fluid resistance optimization: The taper design reduces the turbulence caused by sudden changes in water diameter. CFD simulation shows that the water flow resistance coefficient of the 1:6 taper design is reduced to 0.12 (45% lower than the right-angle connection). The conical tapered design guides the water flow to transition smoothly. The taper of the conical guide ring 220 is 1:5-1:8; ② Enhanced deformation resistance: The conical structure disperses stress concentration at the interface, improves the deformation resistance of the connection by 40%, and ensures long-term sealing; ③ Noise suppression: The smooth guide surface reduces water impact noise, especially high-frequency noise (500-1000Hz).

[0054] The stepped guide ring 230 is another component of the connection structure. It has multiple steps, usually three steps, with a three-step cross-section contraction (1:0.8→1:0.6→1:0.9). The guide surface roughness Ra ≤ 0.4μm, and the height of each step is 1 / 20 to 1 / 15 of the pipe diameter. The guide surface curvature radius R = 2D (D is the pipe diameter). The three-step step eliminates eddy current noise and can reduce the noise peak by 6dB.

[0055] Functions of the stepped guide ring 230: ① Eddy current elimination: The stepped drop design avoids sudden diffusion of water flow and eliminates broadband noise caused by eddy currents. Experimental data shows that the noise peak is reduced by 6dB and the amount of sedimentation at the connection is reduced by 91%; ② Flow rate control: Gradual diversion optimizes water flow velocity distribution, prevents sedimentation caused by local low flow velocity, and improves drainage efficiency; ③ Structural compatibility: Works in conjunction with the conical guide ring to ensure fluid continuity when connecting pipes of different diameters.

[0056] Functional assembly 300 includes a variable diameter guide plate 310 and a double-layer vibration isolation bracket 320. The variable diameter guide plate 310 has an inclination angle of 25-35 degrees and an array of 0.5-1.0 mm micro-protrusions on its surface, with a critical sedimentation particle size of ≥4.0 mm (according to sedimentation tests). The double-layer vibration isolation bracket 320 includes an inner layer of high-damping NR rubber (dissipation factor ≥0.3) and an outer layer of CR rubber (oxygen index ≥28%), with a total thickness of 10-15 mm.

[0057] The variable diameter guide plate 310 is a fluid optimization component in the functional assembly 300. Its installation spacing is 8-12 times the pipe diameter, and its plate surface has an inclination angle of 25-35°. It can be equipped with an array of micro-protrusions with a height of 0.5-1.0 mm. The micro-protrusions are designed to create turbulence, with a self-cleaning rate of ≥97%, and a maintenance cycle extended to 5-8 years.

[0058] The functions of the variable-diameter guide plate 310 are as follows: ① Anti-deposition design: The micro-protrusion array creates local turbulence, increasing the critical sedimentation particle size from 1.5mm to 4.0mm (according to sedimentation test data), with a self-cleaning rate of ≥97%; ② Flow rate control: The tilt angle design reduces the critical drainage flow rate to 0.5m / s (conventionally requires ≥0.7m / s), reducing the risk of siltation at low flow rates; ③ Noise attenuation: Turbulence disperses water flow energy, reducing the noise generated by the impact of direct water (especially in the 200-500Hz frequency range);

[0059] The double-layer vibration isolation bracket 320 is part of the noise reduction component and consists of two layers of rubber: the inner layer is high-damping natural rubber (NR, loss factor ≥ 0.3), and the outer layer is chloroprene rubber (CR, oxygen index ≥ 28%). The total thickness is 10-15mm, and the rubber combination has a vibration isolation efficiency of ≥ 75%. The flame retardancy meets GB 8624B1 level.

[0060] The functions of the double-layer vibration isolation bracket 320 are as follows: ① Vibration isolation: The high-damping NR layer absorbs pipeline vibration energy (vibration isolation efficiency ≥75% in the 31.5-200Hz frequency band), and the outer CR rubber layer provides long-term stability; ② Flame retardant and safe: The CR rubber oxygen index is ≥28%, which meets the GB 8624B1 flame retardant standard and eliminates the fire hazards of traditional vibration isolation materials; ③ Structural sound blocking: Reduces the pipeline vibration acceleration level to 0.05m / s 2 (GB / T 19889.6 test), significantly reducing the transmission of building structure noise.

[0061] The connection structure 200 and the functional component 300 work together: ① Fluid performance: The conical guide ring and the stepped guide ring work together to optimize the water flow path, and the variable diameter guide plate regulates the flow rate and prevents sedimentation. The three together improve the drainage efficiency and self-cleaning ability; ② Mechanics and noise reduction: The double-layer vibration isolation bracket blocks the transmission of vibration, and the composite pipe structure (such as the honeycomb sound-absorbing layer) suppresses airborne sound transmission, achieving a balance between high strength and low noise; ③ Data support: Under the DN150 pipe diameter, the maximum pressure is 1.2MPa, the noise is ≤42dB(A), the compressive deformation is <2% (10-ton load), and the comprehensive performance far exceeds the traditional solution.

[0062] Example implementation scenario 1:

[0063] Super high-rise complex drainage system, 60-story commercial office complex, drainage grease content ≥ 150mg / L, specific parameter configuration is as follows;

[0064]

[0065] Example implementation scenario 2:

[0066] Yard silent drainage system

[0067] Optimized design: The honeycomb layer adopts a double-layer staggered structure (depth 3mm+2mm), and the silencer elbow is equipped with a Helmholtz resonance cavity (volume 0.35cm 3 );

[0068] The hydrophobic layer is added with 5% nanosilver (bactericidal rate ≥ 99.9%);

[0069] Performance indicators: 315Hz noise attenuation 14.2dB, pipe vibration acceleration 0.05m / s 2 , antibacterial coating passed ISO22196 test;

[0070] Hair entanglement rate: 0 times / km

[0071] Example Implementation Scenario 3: Underground Garage Pressure Drainage System

[0072] Optimization plan:

[0073] The reinforcement layer uses basalt fiber (ring stiffness 20.3kN / m 2 );

[0074] The protective layer is added with anti-UV agent, and the tensile strength retention rate after aging is 92%;

[0075] Compression test: deformation under 15 tons load <1.5%.

[0076] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A high-efficiency noise-reducing HDPE building drainage pipe system, characterized in that: include: The pipe body (100) has a five-layer composite structure consisting of, from inside to outside, a spiral composite layer (110), a hydrophobic layer (120), a nano-modified HDPE main pressure-bearing layer (130), a foamed damping layer (140), a honeycomb sound-absorbing layer (150), and a reinforced fiber layer (160); The connection structure (200) comprises a socket joint (210), a conical guide ring (220) and a stepped guide ring (230), wherein the socket joint (210) is provided with a double-bevel sealing ring (211) and a sound-absorbing cotton filling groove (212); The functional component (300) includes a variable diameter flow guide plate (310) and a double-layer vibration isolation bracket (320).

2. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1 is characterized in that: The spiral composite layer (110) has a spiral angle of 55-60°, a rib height of 2-3 mm, a rib spacing of 8-15 mm, and a micropore array with a pore diameter of 0.5-1 mm and a porosity of 15-20%.

3. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1 is characterized in that: The hydrophobic layer (120) is composed of 85-92% HDPE matrix, 5-10% fluorosilane-modified nano-SiO2 (particle size 15-30nm), and 3-5% PTFE micropowder, and has a surface contact angle of ≥118°.

4. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1 is characterized in that: The nano-modified HDPE main pressure-bearing layer (130) contains 88-95% of HDPE resin matrix, 3-8% of nano-silicon dioxide, and 0.5-1.5% of antioxidant by weight, and has a tensile strength of ≥29 MPa.

5. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1 is characterized in that: The honeycomb sound-absorbing layer (140) is composed of regular hexagonal units with a side length of 4-6 mm, a wall thickness of 0.3-0.5 mm, and an insertion loss of ≥8 dB.

6. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1, characterized in that: The reinforcing fiber layer (150) is a silane-treated glass / carbon fiber mixed mesh with a fiber volume content of 35-45% and a ring stiffness of ≥18.5 kN / m 2 .

7. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 2, characterized in that: The micropore array is distributed in a gradient along the direction of water flow, wherein the aperture at the inlet end is 0.8 mm → the outlet end is 0.5 mm, and the noise attenuation for 800-1200 Hz is ≥10 dB.

8. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1, characterized in that: The conical guide ring (220) has a taper of 1:5-1:8, and the stepped guide ring (230) has three levels of drop, with each level having a height of 1 / 20-1 / 15 of the pipe diameter, and a guide surface curvature radius R=2D.

9. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1, characterized in that: The variable diameter guide plate (310) has an inclination angle of 25-35°, a 0.5-1.0 mm micro-protrusion array is provided on the plate surface, and the critical sedimentation particle size is ≥4.0 mm.

10. The high-efficiency noise-reducing HDPE building drainage pipe system according to claim 1, characterized in that: The double-layer vibration isolation bracket (320) comprises an inner layer of high-damping NR rubber and an outer layer of CR rubber, the total thickness of the two being 10-15 mm, the inner layer of high-damping NR rubber having a loss factor of ≥0.3, and the outer layer of CR rubber having an oxygen index of ≥28%.

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