Pipeline noise reduction device

Abstract

The utility model discloses a pipeline noise reduction device. The pipeline noise reduction device comprises a noise reduction cavity, a sound absorption layer, a buffer layer and a sound insulation layer which are sequentially arranged from inside to outside; the noise reduction cavity is arranged outside the pipeline in a sleeving mode and comprises a plurality of noise reduction units which are sequentially arranged in the flowing direction of a medium in the pipeline. The sound reduction units are sequentially connected to form a whole sound reduction cavity, the whole section of each sound reduction unit is of a horn-shaped structure, the end, with a large opening, of each sound reduction unit faces the output end of the pipeline, and the end, with a small opening, of each sound reduction unit faces the input end of the pipeline. Sound generated by a medium in the pipeline is reflected through the arranged sound reduction cavity, first-time noise reduction is achieved, sound which is not reflected by the sound reduction cavity and penetrates through the sound reduction cavity is absorbed through the arranged sound absorption layer, second-time noise reduction is achieved, vibration of the whole pipeline is reduced through the arranged buffer layer, meanwhile, part of sound penetrating through the sound absorption layer is absorbed, and noise reduction is achieved. The sound insulation layer is arranged to prevent lingering sound from penetrating through the pipe body, so that the noise reduction effect is improved.

Description

Technical Field

[0001] The present application relates to a pipeline noise reduction device, belonging to the technical field of noise reduction. Background Art

[0002] In a family house, most of the pipes are embedded inside the wall, but the sewer in the bathroom cannot be embedded inside the wall. The sound of water flowing in the drainage pipe is very loud at night, which will produce a lot of noise. The pipe needs to be treated to reduce noise. The most common noise reduction method is to use a damping and shock-absorbing sheet with self-adhesive glue to bond it to the outside of the pipe, wrap the pipe, and then wrap a layer of sound insulation cotton on the outer layer of the damping and shock-absorbing sheet, and fix the sound insulation cotton with a restraint belt to reduce the noise of the pipe. The disadvantage of this method is that, first of all, it is necessary to manually wrap the damping and shock-absorbing sheet and the sound insulation cotton little by little, which takes a lot of time, resulting in inconvenient installation and reduced work efficiency. Secondly, the sound insulation cotton is exposed to the outside for a long time, which may cause damage, resulting in reduced noise reduction effect. Utility Model Content

[0003] In view of this, the present application provides a pipeline noise reduction device to solve the problem that the above-mentioned existing noise reduction solutions are inconvenient to install and the noise reduction effect is reduced due to the damage of the sound insulation cotton. The specific solution is:

[0004] A pipeline noise reduction device, wherein an input end and an output end are respectively arranged at two ends of the pipeline noise reduction device, and the pipeline noise reduction device comprises a sound reduction cavity, a sound absorbing layer, a buffer layer and a sound insulation layer arranged in sequence from inside to outside;

[0005] The sound reduction cavity comprises a plurality of sound reduction units arranged in sequence along the flow direction of the medium in the pipeline;

[0006] Several of the sound reduction units are connected in sequence to form the entire sound reduction cavity. The sound reduction unit is in a trumpet-like structure as a whole. The end with a larger opening of the sound reduction unit faces the output end of the pipe, and the end with a smaller opening of the sound reduction unit faces the input end of the pipe.

[0007] Preferably, the sound reduction unit comprises a wear-resistant layer and a structural layer;

[0008] The wear-resistant layer is coated on the inner wall of the structural layer and is in contact with the conveying medium;

[0009] The sound absorbing layer is wrapped around the entire structural layer;

[0010] Preferably, the structural layer is a glass fiber reinforced plastic layer;

[0011] The wear-resistant layer is a polytetrafluoroethylene coating.

[0012] Preferably, the sound absorbing layer is a honeycomb structure.

[0013] Preferably, the buffer layer comprises sponge and embedded metal wires;

[0014] The metal wire comprises a first metal wire and a second metal wire arranged in parallel up and down;

[0015] The first metal wire and the second metal wire are wound in an S shape correspondingly to each other and finally form a plurality of horizontal "8"-shaped structures which are inserted into the sponge.

[0016] Preferably, the sound insulation layer is a sound insulation tube body.

[0017] Preferably, the dimensions of the inner walls of the input end, the output end and the sound reduction unit match the outer diameter of the pipe.

[0018] The beneficial effects of this application include:

[0019] The pipeline noise reduction device involved in the present application includes a sound reduction cavity, a sound absorbing layer, a buffer layer and a sound insulation layer arranged in sequence from the inside to the outside; wherein the sound reduction cavity, the sound absorbing layer, the buffer layer and the sound insulation layer are fixedly connected together, and when in use, they only need to be directly put on the outside of the pipeline, which is convenient to install and does not require a lot of manpower and material resources. At the same time, the present application reflects the sound generated by the medium in the pipeline one level at a time through a sound reduction cavity formed by connecting a number of sound reduction units end to end, thereby reducing the sound propagation in the radial direction and the sound propagation in the axial direction of the pipeline, thereby achieving the first noise reduction; the sound absorbing layer is arranged to absorb the sound that penetrates without being reflected by the sound reduction cavity, thereby achieving the second noise reduction; the buffer layer is arranged to absorb part of the sound that penetrates the sound absorbing layer while reducing the vibration of the entire pipeline, thereby achieving the third noise reduction; the sound insulation layer is arranged to prevent the residual sound from penetrating the pipe body, thereby improving the noise reduction effect. The existing noise reduction method has a single structure, and the overall noise reduction effect is greatly affected after a certain layer is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a pipeline noise reduction device according to the present application.

[0021] List of parts and reference numerals:

[0022] 1. Wear-resistant layer; 2. Structural layer; 3. Sound-absorbing layer; 4. Buffer layer; 5. Sound insulation layer; 6. Output end; 7. Input end. DETAILED DESCRIPTION

[0023] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0024] According to the attached Figure 1A pipeline noise reduction device is shown, wherein an input end 7 and an output end 6 are respectively provided at both ends of the pipeline noise reduction device, and the pipeline noise reduction device comprises a sound reduction cavity, a sound absorbing layer 3, a buffer layer 4 and a sound insulation layer 5 which are arranged in sequence from the inside to the outside;

[0025] The sound reduction cavity comprises a plurality of sound reduction units arranged in sequence along the flow direction of the medium in the pipeline;

[0026] Several of the sound reduction units are connected in sequence to form the entire sound reduction cavity. The sound reduction unit is a trumpet-shaped structure as a whole. The end with a larger opening of the sound reduction unit faces the output end 6 of the pipe, and the end with a smaller opening of the sound reduction unit faces the input end 7 of the pipe.

[0027] Further, the sound reduction unit comprises a wear-resistant layer 1 and a structural layer 2;

[0028] The wear-resistant layer 1 is coated on the inner wall of the structural layer 2 and is in contact with the conveying medium;

[0029] The sound absorbing layer 3 is wrapped around the entire structural layer 2 .

[0030] Furthermore, the structural layer 2 is a glass fiber reinforced plastic layer;

[0031] The wear-resistant layer 1 is a polytetrafluoroethylene coating.

[0032] Furthermore, the sound absorbing layer 3 is a honeycomb structure.

[0033] Further, the buffer layer 4 includes sponge and embedded metal wires;

[0034] The metal wire comprises a first metal wire and a second metal wire arranged in parallel up and down;

[0035] The first metal wires and the second metal wires are arranged in an S-shaped staggered manner, and finally form a plurality of horizontal "8-shaped structures" interlaced in the sponge.

[0036] Furthermore, the sound insulation layer 5 is a sound insulation tube body.

[0037] Furthermore, the dimensions of the inner walls of the input end 7, the output end 6 and the sound reduction unit match the outer diameter of the pipe.

[0038] It should be noted that:

[0039] In the present application, the wear-resistant layer 1 is a polytetrafluoroethylene (PTFE) coating, which has a very small friction coefficient and is wear-resistant. At the same time, PTFE is a material that is resistant to most acid and alkali corrosion and can withstand temperatures up to 260 degrees Celsius.

[0040] When the pipeline noise reduction device involved in the present application is installed as a noise reduction device outside a medium transport pipeline, the entire device is mounted outside the pipeline transporting the medium, and the inner walls of the two openings of the sound reduction unit abut against the medium transport pipeline; at this time, the smaller sound reduction unit mainly reduces noise by reflecting sound.

[0041] The pipeline noise reduction device described in the present application can also be used as a transport pipeline, wherein the inner wall of the noise reduction unit is in direct contact with the transport medium. On the one hand, since the inner wall of the noise reduction unit is a wear-resistant layer 1, when the medium is scouring, the smaller the friction, the smaller the resistance and the smaller the vibration. On the other hand, the noise reduction unit is horn-shaped as a whole, with the end with a smaller end size facing the input end 7 and the end with a larger end size facing the output end 6. In the process of the medium flowing from the input end 7 to the output end 6, when passing through each noise reduction unit, the noise reduction caused by the medium scouring the inner wall of the noise reduction unit is reduced by slow flow and pressure reduction.

[0042] In the present application, the structural layer 2 is made of glass fiber reinforced plastics and mainly plays the role of structural support;

[0043] In the present application, the sound insulation layer 5 is a sound insulation tube body, wherein the material of the sound insulation tube body is the same as that of the sound insulation pipe, and is a tube body prepared by mixing high-purity ultra-fine iron powder into polyvinyl chloride.

[0044] In the present application, the sound absorbing layer 3 is composed of honeycomb sound absorbing cotton, which is wrapped around the outside of the entire structural layer 2;

[0045] In the present application, the buffer layer 4 is composed of a sound insulation sponge and metal wires (such as steel wires, iron wires) inserted into the sound insulation sponge, wherein the metal wires form a horizontal "8" structure in the sound insulation sponge, so that the entire buffer layer 4 plays a role in buffering and shock absorption while reducing noise.

[0046] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A pipeline noise reduction device, wherein the two ends of the pipeline noise reduction device are respectively provided with an input end and an output end, characterized in that: The pipeline noise reduction device comprises a sound reduction cavity, a sound absorbing layer, a buffer layer and a sound insulation layer which are arranged in sequence from the inside to the outside; The sound reduction cavity comprises a plurality of sound reduction units arranged in sequence along the flow direction of the medium in the pipeline; Several of the sound reduction units are connected in sequence to form the entire sound reduction cavity. The sound reduction unit is in a trumpet-like structure as a whole. The end with a larger opening of the sound reduction unit faces the output end of the pipe, and the end with a smaller opening of the sound reduction unit faces the input end of the pipe.

2. A pipeline noise reduction device according to claim 1, characterized in that: The sound reduction unit comprises a wear-resistant layer and a structural layer; The wear-resistant layer is coated on the inner wall of the structural layer and is in contact with the conveying medium; The sound absorbing layer is wrapped outside the entire structural layer.

3. A pipeline noise reduction device according to claim 2, characterized in that: The structural layer is a glass fiber reinforced plastic layer; The wear-resistant layer is a polytetrafluoroethylene coating.

4. A pipeline noise reduction device according to claim 1, characterized in that: The sound absorbing layer is a honeycomb structure.

5. The pipeline noise reduction device according to claim 1, characterized in that: The buffer layer includes sponge and embedded metal wires; The metal wire comprises a first metal wire and a second metal wire arranged in parallel up and down; The first metal wire and the second metal wire are correspondingly intertwined in an S-shape, and finally form a horizontal "8"-shaped structure inserted into the sponge.

6. A pipeline noise reduction device according to claim 1, characterized in that: The sound insulation layer is a sound insulation tube body.

7. A pipeline noise reduction device according to claim 1, characterized in that: The dimensions of the inner walls of the input end, the output end and the sound reduction unit match the outer diameter of the pipeline.

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