Mute composite pipe and conveying system

Abstract

The utility model provides a mute composite pipe and a conveying system, and relates to the technical field of mute pipes. The mute composite pipe comprises an inner layer, a middle sound absorption layer and an outer layer which are compounded in sequence, and sound absorption holes are formed in the inner wall of the middle sound absorption layer. The middle sound absorption layer can effectively absorb noise, and the decibel of the noise can be effectively reduced; and through the sound absorption holes formed in the inner wall of the middle sound absorption layer, the damping performance of the middle sound absorption layer can be enhanced, the middle sound absorption layer is easier to vibrate and deform when sound waves are absorbed, and therefore sound wave vibration is converted into heat energy, and the mute effect is further improved. The sound absorption holes in the middle layer and the corona holes in the inner layer form a micro-perforated plate resonance sound absorption structure, so that the resonance sound absorption effect is achieved, and the absorption effect on low-frequency sound waves is obvious. The mute composite pipe can be used for various scenes, such as solid particulate matter transmission, drainage systems of residential areas and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mute pipe technology field, specifically, a mute composite pipe and conveying system. BACKGROUND

[0002] Plastic pipes are widely used in people's production and life, and people have different requirements for the performance of pipes in different use scenarios. Some special use scenarios (for example: solid particle transmission, residential drainage system, etc.) have high requirements for the mute effect of pipes.

[0003] The current mainstream noise reduction technology of the plastic pipe industry has:

[0004] 1. Use high-density fillers in the material formula.

[0005] 2. Pipe foaming, forming voids in the pipe to absorb sound.

[0006] 3. Use hollow wall structure to achieve sound insulation.

[0007] But these three methods have obvious defects, such as using high-density fillers, increasing the density of the pipe, the sound insulation effect is related to the thickness of the sound insulation layer; pipe foaming will affect the performance of the pipe; hollow wall structure pipe has poor sound insulation effect for some specific sound waves, and the cavity may resonate, which amplifies the noise from the pipe itself.

[0008] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0009] The utility model aims to provide a mute composite pipe and conveying system to solve or improve the above technical problems.

[0010] The utility model can be realized as follows:

[0011] In a first aspect, the utility model provides a mute composite pipe, which comprises an inner layer, a middle sound absorption layer and an outer layer which are sequentially compounded.

[0012] The inner wall of the middle sound absorption layer forms sound absorption holes.

[0013] In an optional embodiment, the sound absorption holes are blind holes.

[0014] In an optional embodiment, the perforation rate of the sound absorption holes is 8% to 12%.

[0015] In an optional embodiment, the perforation depth of the sound absorption holes is 1 / 4 to 3 / 4 of the thickness of the middle sound absorption layer.

[0016] In an optional embodiment, the perforation depth of the sound absorption holes is not more than 1mm.

[0017] In an optional embodiment, the sound absorption hole has a diameter of 0.5mm-1mm.

[0018] In an optional embodiment, the outer wall of the inner layer is formed with a corona hole.

[0019] In an optional embodiment, the intermediate sound absorption layer has a thickness of 1mm-2mm.

[0020] In an optional embodiment, the intermediate sound absorption layer is at least one of a PVB layer, an EVA layer and an SGP layer.

[0021] In an optional embodiment, the inner layer is a high-density polyethylene layer.

[0022] In an optional embodiment, the outer layer is a high-density polyethylene layer.

[0023] In a second aspect, the utility model provides a conveying system, including the mute composite pipe of any preceding embodiment.

[0024] The utility model has the advantages of:

[0025] The mute composite pipe provided by the utility model comprises an inner layer, an intermediate sound absorption layer and an outer layer which are sequentially compounded. The intermediate sound absorption layer can effectively absorb noise and reduce the noise decibel. The sound absorption hole formed in the inner wall of the intermediate sound absorption layer can enhance the damping property of the intermediate sound absorption layer, and the intermediate sound absorption layer is more likely to vibrate and deform when absorbing sound waves, so that the sound wave vibration is converted into heat energy, and the mute effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The structure schematic view of the mute composite pipe provided for embodiment 1 is shown in the figure.

[0028] Figure 2 The structure schematic view of the mute composite pipe provided for embodiment 1 is shown in the figure. Figure 1 The enlarged view of the mute composite pipe is shown in the figure.

[0029] Figure 3 The preparation process schematic view of the mute composite pipe in embodiment 1 is shown in the figure.

[0030] Icon: 100 - Mute composite pipe; 10 - Inner layer; 11 - Corona hole; 20 - Intermediate sound absorption layer; 21 - Sound absorption hole; 30 - Outer layer; 41 - Inner layer extruder; 42 - First vacuum sizing tank; 431 - First traction machine; 432 - Second traction machine; 44 - Corona treatment machine; 451 - First oven; 452 - Second oven; 46 - Winding machine; 47 - Outer layer extruder; 48 - Second vacuum sizing tank; 49 - Cutting machine. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0033] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" and the like appear, they are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the terms "horizontal", "vertical" and the like appear, they do not mean that the component must be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the utility model, still need explaining, unless another explicit provision and limitation, if appearing term " setting ", " installation ", " link ", " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the intercommunication.For ordinary skilled in the art, can understand the specific meaning of the above-mentioned terms in the utility model according to specific circumstances.

[0037] Embodiment 1

[0038] Please combine Figure 1 And Figure 2 The utility model provides a kind of mute composite pipe 100, which includes inner layer 10, intermediate sound-absorbing layer 20 and outer layer 30 sequentially compounded.

[0039] The inner wall of the intermediate sound-absorbing layer 20 is formed with sound-absorbing holes 21.

[0040] The intermediate sound-absorbing layer 20 can effectively absorb noise and reduce noise level. The sound-absorbing holes 21 formed in the inner wall of the intermediate sound-absorbing layer 20 can enhance the damping property of the intermediate sound-absorbing layer 20, making it easier to vibrate and deform when absorbing sound waves, thereby converting sound wave vibration into heat energy and further improving the mute effect.

[0041] In this embodiment, the material of the inner layer 10 is high-density polyethylene, and accordingly, the inner layer 10 is a high-density polyethylene layer.

[0042] In this embodiment, the material of the outer layer 30 can also be high-density polyethylene, and accordingly, the outer layer 30 is also a high-density polyethylene layer.

[0043] High-density polyethylene (HDPE) has good wear resistance, electrical insulation, toughness and cold resistance. Moreover, high-density polyethylene has good chemical stability and is insoluble in any organic solvent at room temperature. It is resistant to acid, alkali and various salt corrosion. In addition, high-density polyethylene has low permeability to water vapor and air and low water absorption.

[0044] In this embodiment, the material of the intermediate sound-absorbing layer 20 can include at least one of PVB, EVA and SGP. Accordingly, the intermediate sound-absorbing layer 20 is at least one of a PVB layer, an EVA layer and an SGP layer.

[0045] The polyvinyl butyral (PVB) is a product of polyvinyl alcohol and butyraldehyde condensation under acid catalysis. The PVB has excellent softness and flexibility, and good plastic bonding performance. The processing temperature range of the PVB film is about 120-130℃. The PVB has the characteristics of transparency, heat resistance, cold resistance, mechanical strength, etc., and is an excellent adhesive material. The PVB as the preparation material of the intermediate layer can be used to prepare a quiet solid-wall composite pipe with good quiet effect and excellent comprehensive performance due to its sound absorption, adhesion, toughness, and good impact resistance. However, the PVB film has high water absorption, and generally needs to be sealed at the pipe port.

[0046] The EVA is a copolymer of ethylene and vinyl acetate, and the Chinese name is ethylene-vinyl acetate copolymer (ethylene-vinyl acetate copolymer). The EVA can also be used as a relatively excellent adhesive.

[0047] The SGP glass film (Structural Glass Interlayer) is a structural glass interlayer film material composed of multiple layers of special polymers, and has high strength and rigidity.

[0048] In the embodiment, the thickness of the intermediate sound absorption layer 20 can be 1-2 mm, such as 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, or 2 mm, etc., and can also be other values within the range of 1-2 mm.

[0049] According to the different wall thicknesses of the plastic pipe and the different quietness requirements, the thickness of the intermediate sound absorption layer 20 also needs to be adjusted accordingly. Generally, the thicker the PVB intermediate layer, the better the quietness effect, but the thickness of 1-2 mm has the highest sound insulation performance.

[0050] It should be noted that the thicker the wall thickness of the pipe, the thicker the corresponding intermediate sound absorption layer 20 should be, otherwise it is easy to cause problems such as cavities and wrinkles.

[0051] In the embodiment, the sound absorption holes 21 on the inner wall of the intermediate sound absorption layer 20 can be formed by hot melting and punching. In addition, other ways can also be used according to the actual situation, such as mold hole forming.

[0052] Optionally, the sound absorption holes 21 can be blind holes. By setting the sound absorption holes 21 as blind holes, the noise can collide back and forth in the sound absorption holes 21, achieving the effect of effective sound absorption.

[0053] Preferably, the sound absorption holes 21 can be straight holes, and in addition, it is not excluded that they can be curved holes.

[0054] In this embodiment, the perforation rate of the sound absorption hole 21 can be 8% to 12%, such as 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, or 12%, etc., or other values within the range of 8% to 12%. In some typical embodiments, the perforation rate of the sound absorption hole 21 can be 10%.

[0055] In this embodiment, the perforation depth of the sound absorption hole 21 can be 1 / 4 to 3 / 4 of the thickness of the intermediate sound absorption layer 20, such as 1 / 4, 2 / 4, or 3 / 4, etc., or other values within the range of 1 / 4 to 3 / 4.

[0056] In this embodiment, the perforation depth of the sound absorption hole 21 is not more than 1mm, such as 1mm, 0.8mm, 0.6mm, 0.4mm, 0.2mm, or 0mm, etc., or other values within the range of not more than 1mm. In some typical embodiments, the perforation depth of the sound absorption hole 21 is 0.5 times the thickness of the intermediate sound absorption layer 20.

[0057] In this embodiment, the aperture of the sound absorption hole 21 can be 0.5mm to 1mm, such as 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0mm, etc., or other values within the range of 0.5mm to 1mm.

[0058] Further, the outer wall of the inner layer 10 can also be formed with a corona hole 11. For example, the surface of the inner layer 10 is corona treated using a pipeline corona treatment machine to form the corona hole 11. The sound absorption hole 21 and the corona hole 11 form a micro-perforated panel resonant sound absorption structure, thereby achieving the effect of resonant sound absorption, and the absorption effect of low-frequency sound waves is obvious.

[0059] In some optional embodiments, the preparation process of the above-mentioned silent composite pipe 100 can refer to (combine with) Figure 3 ):

[0060] S1: First, the inner layer 10 is extruded using the inner layer extruder 41, and then the diameter is fixed by the first vacuum sizing box 42.

[0061] S2: After passing through the first vacuum sizing box 42, it is drawn to the corona treatment machine 44 by the first traction machine 431, and the surface of the inner layer 10 is corona treated using the pipeline corona treatment machine 44 to form the corona hole 11.

[0062] S3: The surface temperature of the inner layer 10 is heated to 130°C to 140°C (such as 130°C, 135°C, or 140°C, etc.) using the first oven 451.

[0063] S4: The perforated intermediate sound absorption layer 20 is wound to the surface of the inner layer 10 using the winding machine 46, and the side with the sound absorption hole 21 is attached to the surface of the inner layer 10.

[0064] S5: using the second oven 452 to heat the intermediate sound-absorbing layer 20 (PVB film) to 100-110°C (e.g. 100°C, 105°C, or 110°C, etc.).

[0065] S6: extruding the melt through the outer layer extruder 47 to form the outer layer 30 through the composite die, and then passing through the second vacuum sizing box 48 to size, and the cooling box (not shown in the figure) to cool to obtain the sound-reducing composite pipe 100.

[0066] S7: the cooled sound-reducing composite pipe 100 is pulled by the second puller 432 to the cutting machine 49 for cutting, and then printing, sealing, packaging, and warehousing.

[0067] Based on the above, the sound-reducing composite pipe 100 (taking the intermediate sound-absorbing layer 20 as PVB material as an example) provided by the embodiment has at least the following advantages:

[0068] The intermediate sound-absorbing layer 20 itself is a damping sound-absorbing material, and the sound-absorbing holes 21 are formed on the intermediate sound-absorbing layer 20 to enhance the damping property of the intermediate sound-absorbing layer 20, so that the intermediate sound-absorbing layer 20 is more easily deformed when absorbing sound waves, thereby converting the sound wave vibration into heat energy. At the same time, the sound-absorbing holes 21 of the intermediate sound-absorbing layer 20 and the corona holes 11 of the inner layer 10 form a micro-perforated panel resonant sound-absorbing structure, thereby achieving the effect of resonant sound absorption, and the absorption effect of low-frequency sound waves is obvious.

[0069] The above sound-reducing composite pipe 100 can reduce the number of noises penetrating the pipeline and reduce the noise decibels, and the sound insulation effect can reach more than 40 decibels. At the same time, the above sound-reducing composite pipe 100 also has a certain heat preservation function, reducing the cold and hot interaction between the inside and outside of the pipeline. In addition, the rigidity and toughness of the sound-reducing composite pipe 100 itself will not be reduced due to the strengthening of the sound-reducing effect, and the overall toughness of the pipe material is also strengthened. The sound-reducing composite pipe 100 is green and environmentally friendly, and the intermediate sound-absorbing layer 20 has a low melting point and is easy to separate and recycle.

[0070] Embodiment 2

[0071] The embodiment provides a conveying system, which comprises the sound-reducing composite pipe 100 in the embodiment 1.

[0072] Further, the conveying system can further comprise a pump and various valves installed on the sound-reducing composite pipe 100, which can be set according to actual conditions.

[0073] In summary, the intermediate sound absorption layer 20 in the mute composite pipe 100 is a damping sound absorption material, the sound absorption holes 21 are formed by opening holes on the intermediate sound absorption layer 20, the damping property of the intermediate sound absorption layer 20 can be enhanced, the intermediate sound absorption layer 20 is more easily deformed when absorbing sound waves, so that the sound wave vibration is converted into heat energy. Meanwhile, the sound absorption holes 21 of the intermediate sound absorption layer 20 and the corona holes 11 of the inner layer 10 form a micro-perforated panel resonance sound absorption structure, so that the resonance sound absorption effect is achieved, and the absorption effect of low-frequency sound waves is obvious.

[0074] The mute composite pipe 100 can reduce the number of noises penetrating the pipeline, reduce the noise decibels, and the sound insulation effect can reach more than 40 decibels. Meanwhile, the mute composite pipe 100 also has a certain heat preservation function, and reduces the cold and heat interaction between the inside and outside of the pipeline. In addition, the rigidity and toughness of the mute composite pipe 100 itself will not be reduced due to the enhancement of the mute effect, and the overall toughness of the pipe material is also enhanced. The mute composite pipe 100 is green and environmentally friendly, and the intermediate sound absorption layer 20 has a low melting point and is convenient for layered recycling.

[0075] The above is only a preferred embodiment of the utility model, and is not used for limiting the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A silent composite pipe, characterized by, The sound-absorbing layer comprises an inner layer, a middle sound-absorbing layer and an outer layer which are sequentially compounded; An inner wall of the middle sound-absorbing layer is formed with sound-absorbing holes; The sound-absorbing holes are blind holes; a perforation rate of the sound-absorbing holes is 8%~12%; a perforation depth of the sound-absorbing holes is 1 / 4~3 / 4 of a thickness of the middle sound-absorbing layer; the perforation depth of the sound-absorbing holes is not more than 1mm; and an outer wall of the inner layer is formed with corona holes.

2. The silent composite tube according to claim 1, wherein A hole diameter of the sound-absorbing holes is 0.5mm~1mm.

3. The silent composite tube according to claim 1, wherein, The thickness of the middle sound-absorbing layer is 1mm~2mm.

4. The silent composite tube of claim 1, wherein, The middle sound-absorbing layer is a PVB layer, an EVA layer or an SGP layer; And / or, the inner layer is a high-density polyethylene layer; And / or, the outer layer is a high-density polyethylene layer.

5. A delivery system characterized by, The mute composite pipe comprises the mute pipe according to any one of claims 1~4.

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