Silent drainage pipeline

Abstract

The utility model discloses a mute drainage pipeline which comprises an inner pipe layer, a damping layer, a silencing layer and an outer pipe layer. Wherein the inner pipe layer is provided with a linear flow guide body, water flow can flow in a vortex state during drainage, blocking force is generated on the water flow at multiple positions in the pipe body, impact of the water flow on the inner pipe wall is reduced, and noise of the pipeline structure is lowered. The inner pipe layer is peripherally wrapped by the damping layer, vibration generated by water flow impact is weakened through the damping characteristic of the damping layer, and the buffering and damping effects are achieved. The sound attenuation layer utilizes acoustic propagation characteristics and adopts a wedge structure to increase sound propagation distance and absorb noise, so that the purpose of sound attenuation is achieved. The outer pipe layer is of a solid structure and is made of the same material as the inner pipe layer, the overall strength of the pipe body is improved, and the service life of the pipeline is prolonged. The noise reduction device has an obvious noise reduction effect on noise generated by the drainage pipe, meets the comfort requirement of modern family life, and is suitable for being popularized in the technical field of drainage.

Description

Technical Field

[0001] The utility model relates to the field of drainage pipes, and more specifically, to a silent drainage pipe. Background Art

[0002] The suppression of indoor drainage noise has always been one of the difficult problems in the field of drainage technology. Especially in high-rise buildings, the drainage noise has a greater impact on people's daily life. With the improvement of people's living standards, higher requirements are put forward for the comfort of residences, including the problem of suppressing indoor drainage pipe noise. In the existing technical solutions, such as the polypropylene silent drainage pipe disclosed in CN219159829U, in which a fluid guide is provided on the inner wall to reduce the collision between water flows and between the water flow and the pipe wall, reducing noise; a foaming structure noise reduction layer is provided on the outer wall, and the air holes in the foaming structure can block the noise generated during drainage, making the pipe have a dual sound insulation effect. However, the production of the fluid guide with an inner spiral structure is difficult, and when the flow rate is large, resulting in an increase in the vibration amplitude of the pipe structure, its sound insulation ability significantly decreases. Content of the Utility Model

[0003] Aiming at the problems of difficult production and poor sound insulation effect in the existing technical solutions, the utility model designs a silent drainage pipe, which not only reduces the production difficulty, but also has a better noise reduction and sound insulation effect, meets the requirements of modern indoor life for comfort, and is suitable for wide promotion and use in the drainage field.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A silent drainage pipe, characterized in that it comprises an inner pipe layer, a shock absorption layer, a sound insulation layer and an outer pipe layer. A plurality of fluid guides are provided on the inner pipe layer. The shock absorption layer is sleeved outside the inner pipe layer. A number of evenly arranged sound insulation units are provided in the sound insulation layer. The sound insulation layer is sleeved outside the shock absorption layer. The outer pipe layer is sleeved outside the sound insulation layer.

[0006] After a large stream of water flows into the silent drainage pipe, it is divided into multiple small water streams by the fluid guides, and the flow direction is guided to different positions in the pipe, reducing the impact force of the water flow on the pipe wall, and achieving the effect of noise reduction and noise suppression; the shock absorption layer is wrapped around the outer periphery of the inner pipe layer, reducing the vibration amplitude of the structural vibration generated after the inner pipe layer is impacted, and reducing the noise caused by the structural vibration; the sound insulation layer further increases the distance of noise propagation, making the energy of the noise gradually attenuate during the propagation process, and increasing the noise reduction ability of the water pipe; the outer pipe layer is a solid structure, improving the overall strength of the pipe, protecting the structures of the internal shock absorption layer and sound insulation layer, and increasing the reliability of pipe installation and the service life of the pipe.

[0007] Furthermore, the fluid guide is a protruding structure in a straight line shape or a spiral rib shape. The straight-line fluid guide has low forming difficulty during the production process, which can reduce the production cost of the pipeline. The spiral rib-shaped fluid guide can make the water flow in the pipeline form a vortex, blocking the water flow at multiple positions inside the pipeline and reducing the impact force of the water flow on the pipeline.

[0008] Furthermore, the distance between the fluid guides continuously increases along the direction of the water flow. As the pipeline spacing continuously increases, the large water flow is divided, guiding multiple small water flows to different positions inside the pipeline, making full use of the internal space of the pipeline while reducing the impact force of the water flow on the pipeline.

[0009] Furthermore, the included angle of the fluid guide on the horizontal projection plane is 5 degrees to 15 degrees. Controlling the angle range between the fluid guides within 5 degrees to 15 degrees can not only play the role of cutting the water flow and guiding the flow direction, but also avoid the problem of blockage caused by a large inclination angle of the fluid guide.

[0010] Furthermore, the cross-sectional shape of the fluid guide is any one of a conical surface, a semi-circular surface, and a trapezoidal surface. For fluid guides with different cross-sectional shapes, the contact area between the fluid guide and the water flow, that is, the effective flow guiding area, is different, and can be selected according to different application scenarios and drainage flow rates.

[0011] Furthermore, the noise reduction unit is a wedge structure. The wedge structure makes the noise reflect multiple times within the noise reduction unit, continuously absorbing the energy of the noise during the propagation process, and the noise reduction effect is obvious.

[0012] Furthermore, the fluid guide and the inner pipe layer are of an integrally formed structure. The integrally formed structure design of the fluid guide and the inner pipe layer is tightly connected and does not require assembly, reducing the installation difficulty of the pipeline.

[0013] Furthermore, the thickness of the shock-absorbing layer is equal to the thickness of the inner pipe layer. The shock-absorbing layer is wrapped around the outer periphery of the inner pipe layer. When the thickness of the shock-absorbing layer is less than the thickness of the inner pipe layer, the thinner shock-absorbing layer cannot fully exert the shock-absorbing effect of the material; when the thickness of the shock-absorbing layer is greater than the thickness of the inner pipe layer, the thicker shock-absorbing layer will increase the production cost of the pipeline. Controlling the thickness of the shock-absorbing layer to be the same as that of the inner pipe layer can give full play to its shock-absorbing effect while taking into account the production cost.

[0014] Furthermore, the thickness of the sound-absorbing layer is 150% to 200% of the thickness of the inner pipe layer. The thickness of the sound-absorbing layer should be 1.5 to 2 times the thickness of the inner pipe layer. Controlling the thickness of the sound-absorbing layer within this range can increase the propagation distance of the noise in the sound-absorbing layer and give full play to the noise reduction function of the noise reduction unit.

[0015] Furthermore, the thickness of the outer pipe layer is equal to that of the inner pipe layer and they are made of the same material. The outer pipe layer is set as a solid structure with the same material and thickness as the inner pipe layer, which can further strengthen the structural strength of the pipeline and extend its service life. When the thickness is less than that of the inner pipe layer, that is, when the wall thickness of the outer pipe layer is relatively thin, its protective effect on the sound insulation layer and shock absorption layer will decrease; when the thickness is greater than that of the inner pipe layer, that is, when the wall thickness of the outer pipe layer is relatively thick, it is not conducive to installation in family residences.

[0016] Compared with the prior art, the utility model has the following beneficial effects: The shock absorption layer reduces the structural vibration of the inner pipe layer after being impacted, and the sound insulation layer absorbs the flow-induced noise generated by the water flow impacting the pipeline. The two cooperate together to significantly reduce the drainage noise and can also achieve obvious effects in occasions with large flow rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the silent drainage pipeline of the present utility model;

[0019] Figure 2 It is a schematic diagram of the silent drainage pipeline in the second embodiment;

[0020] Figure 3 It is a schematic diagram of the silent drainage pipeline in the third embodiment;

[0021] DESCRIPTION OF THE REFERENCE NUMERALS:

[0022] 1. Inner pipe layer; 11. Fluid guide; 2. Shock absorption layer; 3. Sound insulation layer; 4. Outer pipe layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] As Figure 1 shown, the silent drainage pipe in this embodiment includes an inner pipe layer 1, a shock-absorbing layer 2, a sound-absorbing layer 3, and an outer pipe layer 4. A plurality of fluid guides 11 are provided on the inner pipe layer 1. The shock-absorbing layer 2 is sleeved outside the inner pipe layer 1. The sound-absorbing layer 3 is sleeved outside the shock-absorbing layer 2. A number of evenly arranged sound-absorbing units are provided in the sound-absorbing layer 3. The outer pipe layer 4 is sleeved outside the sound-absorbing layer 3.

[0029] The fluid guide 11 protrudes into the pipe, and its overall structure is linear, which is convenient for co-extrusion with the inner pipe layer 1 in the pipe by an extruder during production, reducing the production difficulty and processing cost. Along the direction from the water inlet of the pipe to the water outlet of the pipe, that is, the water flow direction, the distance between the fluid guides 11 continuously increases. When the water flow just enters the pipe, the distance between the fluid guides 11 is small, which is convenient for jointly cutting the large water flow. During the subsequent drainage process, continuously increasing the distance between the fluid guides 11 can guide the cut small water flows to various positions inside the pipe, making full use of the internal space of the pipe and avoiding the large water flow directly hitting the pipe.

[0030] A total of 3 fluid guides 11 are provided, and the included angles between the fluid guides 11 on the horizontal projection plane are 5 degrees, 10 degrees or 15 degrees, gradually separating the water flow and diverting it to different positions, avoiding reducing the diversion effect due to too small an included angle, and at the same time avoiding increasing the impact force between the water flow and the fluid guides 11 due to too large an included angle, generating extra noise. Too large an included angle between the fluid guides 11 may also affect the normal flow of the water flow in the pipe, causing water accumulation and blockage. The cross-sectional shape of the fluid guide can be any one of a conical surface, a semi-circular surface, and a trapezoidal surface. The effective diversion areas of the fluid guides with different cross-sectional shapes are different, and can be selected according to different drainage volumes. When installing a household pipe, a conical surface can be selected.

[0031] The inner pipe layer 1 and the fluid guide 11 are made of the same UPVC material. The UPVC pipe has corrosion resistance, can resist strong acids and strong alkalis, and will not rust and scale. The inner wall of the UPVC pipe is very smooth. Its surface roughness coefficient is only 0.009, and the fluid resistance is very small, and it will not overly reduce the water pressure. The UPVC pipe has high mechanical strength, strong resistance to water pressure and impact. The UPVC pipe has a small density, is light in texture, is convenient for installation and construction, and has many application scenarios. The UPVC pipe has good water tightness and will not have problems such as aging and water leakage when the service life increases.

[0032] The shock-absorbing layer 2 is wrapped around the outer circumference of the inner pipe layer 1 in a circumferential direction with a rubber material. Based on the elasticity and ductility of the rubber, it can greatly reduce the structural vibration generated by the water flow hitting the pipe; in addition, since the pipe body is a plastic material, when the water flow temperature in the drainage pipe changes, the rubber material of the shock-absorbing layer 2 can well adapt to the thermal expansion and contraction of the pipe. At present, common rubber materials include natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and butyl rubber (IIR), etc. Among them, butyl rubber (IIR) has excellent heat aging resistance, ozone aging resistance, electrical insulation performance, and water tightness performance. Therefore, butyl rubber (IIR) is used for the shock-absorbing layer 2 in this embodiment.

[0033] In this embodiment, the sound-absorbing layer 3 circumferentially wraps around the outer circumferential surface of the shock-absorbing layer 2. The sound-absorbing layer is provided with a number of evenly arranged sound-absorbing units, and the sound-absorbing units are in the shape of wedges. According to the principle of sound propagation, when the noise of the drain pipe reaches the sound-absorbing layer 3, the sound will be reflected multiple times in the sound-absorbing units of the wedge structure, thereby increasing the propagation distance of the sound and consuming the energy of the noise, achieving the effect of noise reduction. In order to give full play to the noise reduction function of the sound-absorbing layer 3, the sound-absorbing material in this embodiment uses polyester fiber sound-absorbing cotton material. The polyester fiber sound-absorbing cotton has a high density and a dense structure, can effectively isolate the noise and the propagation of sound, can minimize the impact caused by the drainage noise, and improve the living experience in places such as residences and apartments.

[0034] In this embodiment, the outer pipe layer 4 uses the same UPVC material as the inner pipe layer 1, which increases the overall structural strength of the pipeline, protects the structures of the shock-absorbing layer 2 and the sound-absorbing layer 3, and extends the service life of the pipeline. In this embodiment, the inner pipe layer 1, the shock-absorbing layer 2, the sound-absorbing layer 3, and the outer pipe layer 4 are all fixedly connected by gluing to prevent relative movement between the structures of each layer during use.

[0035] Embodiment 2

[0036] As Figure 2 shown, in the silent drainage pipeline of this embodiment, it includes an inner pipe layer 1, a shock-absorbing layer 2, a sound-absorbing layer 3, and an outer pipe layer 4. A plurality of fluid guides 11 are provided on the inner pipe layer 1. The shock-absorbing layer 2 is sleeved outside the inner pipe layer 1. The sound-absorbing layer 3 is sleeved outside the shock-absorbing layer 2. The sound-absorbing layer 3 is provided with a number of evenly arranged sound-absorbing units. The outer pipe layer 4 is sleeved outside the sound-absorbing layer 3.

[0037] The fluid guide 11 in this embodiment is set as an inner spiral structure protruding into the pipeline. Six fluid guides 11 with a spiral rib structure are evenly arranged on the inner wall of the inner pipe layer 1 of the pipeline. The cross-sectional shape of the fluid guide 11 is set as a cone. The fluid guide 11 is integrally formed with the inner pipe layer 1 and can be co-extruded using a spiral extruder. After the water flow enters the pipeline, under the action of the fluid guide 11, the water flow in the drain pipe flows in a vortex state, forming a blocking force on the water flow at multiple positions in the pipeline, reducing the impact of the water flow on the pipe wall, thereby reducing the vibration of the pipeline structure and achieving the effect of noise reduction and silence.

[0038] The inner pipe layer 1 and the fluid guide 11 in this embodiment use the same UPVC material. The UPVC pipe has corrosion resistance, can withstand strong acids and alkalis, and will not rust and scale. The inner wall of the UPVC pipe is very smooth. Its surface roughness coefficient is only 0.009, and the fluid resistance is very small, and it will not overly reduce the water pressure. The UPVC pipe has high mechanical strength and strong resistance to water pressure and impact. The UPVC pipe has a small density, is light in texture, is convenient for installation and construction, and has many application scenarios. The UPVC pipe has good water tightness and will not have problems such as aging and water leakage when the service life increases.

[0039] The shock-absorbing layer 2 is circumferentially wrapped around the outer circumference of the inner pipe layer 1 with a rubber material. Based on the elasticity and ductility of the rubber, it can significantly reduce the structural vibration generated by the water flow hitting the pipeline. In addition, since the pipe body is made of plastic material, when the water flow temperature of the drainage pipe changes, the rubber material of the shock-absorbing layer 2 can well adapt to the thermal expansion and contraction of the pipeline. At present, common rubber materials include natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and butyl rubber (IIR), etc. Among them, butyl rubber (IIR) has excellent heat aging resistance, ozone aging resistance, electrical insulation performance, and water tightness performance. Therefore, butyl rubber (IIR) is used for the shock-absorbing layer 2 in this embodiment.

[0040] The sound-absorbing layer 3 in this embodiment is circumferentially wrapped around the outer surface of the shock-absorbing layer 2. There are several evenly arranged sound-absorbing units in the sound-absorbing layer, and the sound-absorbing units are in a wedge structure. According to the principle of sound propagation, when the noise of the drainage pipe reaches the sound-absorbing layer 3, the sound will be reflected multiple times in the sound-absorbing units with a wedge structure, thereby increasing the propagation distance of the sound and consuming the energy of the noise, achieving a sound-absorbing effect. In order to give full play to the noise reduction function of the sound-absorbing layer 3, the sound-absorbing material in this embodiment uses polyester fiber sound-absorbing cotton material. The polyester fiber sound-absorbing cotton has a high density and a dense structure, which can effectively isolate the noise and the propagation of sound, minimize the influence caused by the drainage noise, and improve the living experience in places such as residences and apartments.

[0041] The outer pipe layer 4 in this embodiment uses the same UPVC material as the inner pipe layer 1, increasing the overall structural strength of the pipeline, protecting the structures of the shock-absorbing layer 2 and the sound-absorbing layer 3, and extending the service life of the pipeline.

[0042] Embodiment III

[0043] As Figure 3 shown, this embodiment is similar to Embodiment II. The difference is that in this embodiment, the thickness of the shock-absorbing layer 2 is equal to the thickness of the inner pipe layer 1, the thickness of the sound-absorbing layer 3 is 150% to 200% of the thickness of the inner pipe layer 1, the thickness of the outer pipe layer 4 is equal to the thickness of the inner pipe layer 1, and they are prepared with the same material.

[0044] The shock-absorbing layer 2 uses butyl rubber and is sleeved on the outer periphery of the inner pipe layer 1. If the thickness of the shock-absorbing layer 2 is less than the thickness of the inner pipe layer 1, the shock-absorbing effect of the rubber cannot be fully exerted, nor can it well adapt to the thermal expansion and contraction of the inner pipe layer 1 caused by the water temperature change. If the thickness of the shock-absorbing layer 2 is greater than the thickness of the inner pipe layer 1, it will greatly increase the production cost of the pipeline. Considering the production cost, making full use of the shock-absorbing characteristics of the rubber, absorbing energy, reducing the self-structural vibration of the inner pipe layer 1, and exerting the noise reduction effect, the thickness of the shock-absorbing layer 2 in this embodiment is set to be the same as the thickness of the inner pipe layer 1.

[0045] In this embodiment, the sound-absorbing layer 3 is made of polyester fiber sound-absorbing cotton, which is sleeved on the outer periphery of the shock-absorbing layer 2 and has a thickness of 150% to 200% of the thickness of the inner pipe layer 1. The thickness is greater than 150% of the thickness of the inner pipe layer 1, so that the propagation distance of the flow-induced noise in the sound-absorbing layer 3 is increased, and the energy is absorbed by the sound-absorbing cotton when multiple reflections occur in the sound-absorbing unit, and the noise reduction effect is obvious. At the same time, the thickness of the sound-absorbing layer 3 should also be controlled within 200% of the thickness of the inner pipe layer to reduce the overall production cost of the pipeline.

[0046] The thickness of the outer pipe layer 4 is equal to that of the inner pipe layer 1, and both are made of UPVC material. The outer pipe layer 4 with the same thickness as the inner pipe layer 1 can protect the internal structures of the shock-absorbing layer 2 and the sound-absorbing layer 3 and improve the overall structural strength. If the thickness of the outer pipe layer 4 is less than that of the inner pipe layer 1, the protection effect is not good and it is easy to be damaged during use; if the thickness of the outer pipe layer 4 is greater than that of the inner pipe layer 1, the overall size of the pipeline will increase, which is not conducive to installation in residential houses.

Claims

1. A silent drainage pipe, characterized in that, It includes an inner tube layer (1), a shock-absorbing layer (2), a sound-absorbing layer (3) and an outer tube layer (4). A plurality of fluid guides (11) are provided on the inner tube layer (1). The shock-absorbing layer (2) is sleeved on the outside of the inner tube layer (1). A number of evenly arranged sound-absorbing units are provided in the sound-absorbing layer (3). The sound-absorbing layer (3) is sleeved on the outside of the shock-absorbing layer (2). The outer tube layer (4) is sleeved on the outside of the sound-absorbing layer (3); the fluid guide (11) is a linear protruding structure, and the distance between the fluid guides (11) continuously increases along the water flow direction. The included angle of the fluid guide (11) in the horizontal projection plane is 5 degrees to 15 degrees.

2. The silent drainage pipe according to claim 1, wherein The cross-sectional shape of the fluid guide (11) is any one of a conical surface, a semi-circular surface, and a trapezoidal surface.

3. A silent drainage pipe according to claim 1, characterized in that, The fluid guide (11) and the inner tube layer (1) are of an integrally formed structure.

4. A silent drainage pipe according to claim 1, characterized in that, The sound-absorbing unit is a wedge structure.

5. A silent drainage pipe according to any one of claims 2 to 4, characterized in that The thickness of the shock-absorbing layer (2) is equal to the thickness of the inner tube layer (1).

6. A silent drainage pipe according to any one of claims 2 to 4, characterized in that, The thickness of the sound-absorbing layer (3) is 150% to 200% of the thickness of the inner tube layer (1).

7. A silent drainage pipe according to any one of claims 2 to 4, characterized in that, The thickness of the outer tube layer (4) is equal to the thickness of the inner tube layer (1) and is prepared from the same material.

Images