Pipe with sound deadening structure

Abstract

The application provides a pipeline with a sound-absorbing structure, comprising a pipeline and a sound-absorbing structure. The pipeline has a consistent diameter. The sound-absorbing structure comprises a main sound-absorbing pipe and a baffle. The baffle is arranged around the main sound-absorbing pipe and connected to the main sound-absorbing pipe, and the baffle comprises opposite first and second sides; the main sound-absorbing pipe extends on the first and / or second side of the baffle; the main sound-absorbing pipe of the sound-absorbing structure is arranged in the pipeline and connected to the pipeline via the baffle, and the baffle is arranged to be capable of blocking fluid from flowing through the baffle from the space between the pipeline and the main sound-absorbing pipe. In the same space, the pipeline of the application occupies less space, so more other devices can be arranged, and if other devices do not need to be arranged, the small space occupied by the pipeline makes the overall device structure compact.

Description

Technical Field

[0001] This application relates to piping, and more specifically to refrigerant gas piping with a sound-absorbing structure. Background Technology

[0002] When fluid flows through a pipeline, pressure pulsations in the fluid not only induce pipeline-radiated noise but also propagate downstream, becoming a source of noise radiation from downstream equipment. In industry, silencers are typically installed on such pipelines to reduce pressure pulsation energy and thus lower fluid noise. Existing pipeline reactive silencers all incorporate expansion chambers, but the inclusion of these chambers hinders manufacturing cost control and requires additional space, making compact pipeline layout difficult. Summary of the Invention

[0003] This application provides a pipeline with a noise reduction structure. The pipeline includes a pipe and a noise reduction structure, the pipe having a uniform diameter. The noise reduction structure includes a main noise reduction pipe and a baffle, the baffle being disposed around and connected to the main noise reduction pipe, the baffle including opposing first and second sides; the main noise reduction pipe extending from the first and / or second sides of the baffle; the main noise reduction pipe of the noise reduction structure is disposed in the pipe and connected to the pipe via the baffle, the baffle being configured to prevent fluid from flowing through the space between the pipe and the main noise reduction pipe.

[0004] According to the pipeline of this application, the baffle is annular, the baffle has an inner diameter and an outer diameter, the inner diameter matches the outer diameter of the main silencer pipe, and the outer diameter is greater than or equal to the inner diameter of the pipeline.

[0005] According to the piping of this application, the main silencer extends a first length L1 on the first side of the baffle and a second length L2 on the second side of the baffle, wherein the first length L1 and the second length L2 are not equal.

[0006] According to the conduit of this application, the first length L1 is determined based on the first wavelength λ1 of the sound to be eliminated, and the relationship between the first length L1 and the first wavelength λ1 satisfies:

[0007] L1=(0.85~1.15)×1 / 4×λ1;

[0008] The second length L2 is determined based on the second wavelength λ2 of the sound to be eliminated, and the relationship between the second length L2 and the second wavelength λ2 satisfies:

[0009] L2=(0.85~1.15)×1 / 4×λ2.

[0010] According to the pipeline of this application, the axis of the main silencer pipe is parallel to the axis of the pipeline, and the axis of the main silencer pipe is offset from the axis of the pipeline.

[0011] According to the piping of this application, it also includes an auxiliary silencer pipe that extends on a first side and / or a second side of the baffle, and the auxiliary silencer pipe may selectively penetrate the baffle or not.

[0012] According to the pipeline of this application, the auxiliary silencer pipe is sleeved outside the main silencer pipe, and the inner wall of the auxiliary silencer pipe is spaced apart from the outer wall of the main silencer pipe.

[0013] According to the pipeline of this application, the ratio of the outer diameter of the main silencer pipe to the inner diameter of the pipeline is 0.5 to 0.9.

[0014] The pipeline according to this application includes several of the aforementioned noise-reducing structures, which are sequentially arranged in the pipeline.

[0015] According to the pipeline of this application, the pipeline does not have an expansion section.

[0016] According to the pipeline of this application, the pipeline includes an air inlet section, a silencer section, and an air outlet section, the silencer structure is disposed in the silencer section, and the diameters of the air inlet section, the silencer section, and the air outlet section are equal. Attached Figure Description

[0017] Figure 1A This is a perspective view of the first embodiment of the conduit 180 according to this application;

[0018] Figure 1B yes Figure 1A The pipe 180 shown runs along Figure 1A A sectional view cut along line AA in the diagram;

[0019] Figure 2 yes Figure 1A A three-dimensional view of the sound-absorbing structure 100 of the pipeline 180 shown;

[0020] Figure 3 yes Figure 1A The diagram shown illustrates the working principle of pipe 180.

[0021] Figure 4 This is a perspective view of a second embodiment of the conduit 480 according to this application;

[0022] Figure 5 This is a perspective view of the third embodiment of the conduit 580 according to this application;

[0023] Figure 6 This is a perspective view of the fourth embodiment of the conduit 680 according to this application;

[0024] Figure 7 This is a perspective view of the fifth embodiment of the conduit 780 according to this application;

[0025] Figure 8 This is a perspective view of the sixth embodiment of the conduit 880 according to this application;

[0026] Figure 9 This is a perspective view of the seventh embodiment of the conduit 980 according to this application;

[0027] Figure 10A This is a perspective view of the eighth embodiment of the conduit 1080 according to this application;

[0028] Figure 10B yes Figure 10A The pipe 1080 shown runs along Figure 10A A sectional view cut along line AA. Detailed Implementation

[0029] Various specific embodiments of this application will now be described with reference to the accompanying drawings, which form part of this specification. It should be understood that although terms indicating direction, such as "front," "rear," "up," "down," "left," and "right," are used herein to describe various exemplary structural parts and elements, their use is merely for illustrative purposes and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed herein can be arranged in different orientations, these terms indicating direction are illustrative only and should not be considered limiting.

[0030] Figure 1A This is a perspective view of the first embodiment of the conduit 180 of this application. Figure 1B yes Figure 1A The pipe 180 shown runs along Figure 1A A sectional view cut along line AA. (Example) Figure 1A and 1B As shown, the pipeline 180 includes a pipe 150 and a noise-reducing structure 100 disposed within the pipe 150. The pipe 150 includes an air inlet section 151, a noise-reducing section 152, and an air outlet section 153. The pipe 150 has a uniform diameter; that is, the inner and outer diameters of the air inlet section 151, the noise-reducing section 152, and the air outlet section 153 of the pipe 150 are all equal. It should be noted that the term "uniform or equal" in this application includes "approximately uniform" or "approximately equal."

[0031] A flange 154 is provided on the inlet section 151 of the pipeline 150. The pipeline 150 can be connected to the inlet flange or outlet flange of the compressor via the flange 154. The outlet section 153 of the pipeline 150 can also be connected to other equipment or pipelines via flanges or welding. A noise-reducing structure 100 is installed in the noise-reducing section 152 of the pipeline 150; its specific structure will be discussed later. Figure 2 This will be explained in detail later.

[0032] Figure 2 yes Figure 1A The perspective view of the noise reduction structure 100 of the pipe 180 shown illustrates the specific structure of the noise reduction structure 100. For example... Figure 2 As shown, the silencing structure 100 includes a main silencing pipe 210 and a baffle 220 surrounding the main silencing pipe 210. The main silencing pipe 210 passes through the baffle 220, which extends generally transversely to the main silencing pipe 210. The main silencing pipe 210 is cylindrical, and the baffle 220 is annular. The inner diameter of the baffle 220 matches the outer diameter of the main silencing pipe 210, ensuring no gap between them after assembly. As an example, the outer diameter of the main silencing pipe 210 can be slightly larger than the inner diameter of the baffle 220, allowing the main silencing pipe 210 to be connected to the baffle 220 via an interference fit. Of course, the main silencing pipe 210 can also be connected to the baffle 220 in other ways. For example, when both the main silencer 210 and the baffle 220 are made of metal, the outer diameter of the main silencer 210 is equal to the inner diameter of the baffle 220, and they can be connected to each other by welding.

[0033] The outer diameter of the baffle 220 matches the inner diameter of the pipe 150, thereby allowing the sound-absorbing structure 100 to be installed inside the pipe 150 (in... Figure 1B (See more details below). As an example, the outer diameter of the baffle 220 can be slightly larger than the inner diameter of the pipe 150, allowing the silencing structure 100 to be connected to the pipe 150 via an interference fit. Of course, the silencing structure 100 can also be connected to the pipe 150 in other ways. For example, when both the baffle 220 and the pipe 150 are made of metal, and the outer diameter of the baffle 220 is equal to the inner diameter of the pipe 150, the baffle 220 can be welded to the wall of the pipe 150. Alternatively, if the outer diameter of the baffle 220 is larger than the inner diameter of the pipe 150, the silencing structure 100 can be fixed by clamping the baffle 220 with a flange on the pipe 150.

[0034] The main silencer duct 210 has an axis X, and the baffle 220 has an axis Y. In this embodiment, the axis X of the main silencer duct 210 coincides with the axis Y of the baffle 220, that is, the main silencer duct 210 and the baffle 220 are arranged coaxially. In this embodiment, with the baffle 220 as the boundary, the main silencer duct 210 includes two parts: a first main silencer section 211 located on the left side 221 (first side) of the baffle 220 and a second main silencer section 212 located on the right side 222 (second side) of the baffle 220. The first main silencer section 211 has a first length L1 (in Figure 3 (As shown more specifically below), the first length L1 refers to the length from the left end of the main silencer duct 210 to the left side 223 of the baffle 220. The second main silencer section 212 has a second length L2, which refers to the length from the right end of the main silencer duct 210 to the right side 224 of the baffle 220. In other words, the main silencer duct 210 extends the first length L1 on the left side 221 of the baffle 220 and extends the second length L2 on the right side 222 of the baffle 220. In this embodiment, the first length L1 is equal to the second length L2. In addition, the main silencer duct 210 also includes a connecting section 215 located in the baffle 220. The connecting section 215 connects the first main silencer section 211 and the second main silencer section 212, and its length is approximately the same as the thickness of the baffle 220. The length L of the main silencer duct 210 is the sum of the first length L1, the second length L2, and the length of the connecting section 215.

[0035] Figure 3 yes Figure 1A The schematic diagram shown illustrates the working principle of pipe 180. Pipe 150 is schematically represented by dashed lines. Figure 3 As shown, the pipe 150 and the silencing structure 100 are arranged coaxially, that is, the axis Z of the pipe 150 coincides with the axis Y of the baffle 120 and the axis X of the main silencing pipe 210. Figure 3 In the diagram, solid arrows represent incident sound waves, and dashed arrows represent reflected sound waves, used to indicate the distribution of incident and reflected sound waves in pipe 180.

[0036] Specifically, the fluid flows from the left end to the right end of pipe 150. The pressure pulsation energy (sound energy) of the fluid propagates within pipe 150. When the frequency is below a certain value (e.g., 750Hz), the propagation of the pressure pulsation (sound) in the pipe manifests as a plane wave. That is, during the propagation of the pressure pulsation along the axial direction of pipe 150, the pressure pulsation energy distributed on the same cross-section is equal at any position along the Z-axis of pipe 150. It should be noted that... Figure 3In this example, the fluid flows from the left end to the right end of pipe 150, but the pressure pulsations, which manifest as plane waves, are parallel to the pipe axis Z. That is, a portion of the pressure pulsations propagates to the right parallel to the pipe axis Z (in this case, the pressure pulsation is in the same direction as the fluid flow), while another portion propagates to the left parallel to the pipe axis Z (in this case, the pressure pulsation is in the opposite direction to the fluid flow). To better illustrate the noise reduction principle of pipe 180, Figure 3 The solid arrows in the diagram only show the portion of the sound waves associated with the silencing structure 100.

[0037] Continue to refer to Figure 3 The baffle 220 prevents fluid from flowing through the space between the pipe 150 and the main silencer pipe 210. The pressure pulsation energy (incident sound wave) in this portion of the fluid propagates parallel to the Z-axis and impacts the left side 223 of the baffle 220. Due to the obstruction of the baffle 220, the incident sound wave is reflected after impacting the left side 223, forming a reflected sound wave. The direction of the reflected sound wave is also parallel to the Z-axis, but opposite to the direction of the incident sound wave. During this process, there is a phase difference between the reflected and incident sound waves, which allows the reflected sound wave to interfere and cancel out subsequent incident sound waves, thus producing a noise reduction effect. The fluid that does not enter the space between the main silencer pipe 210 and the pipe 150 continues to flow forward through the internal space of the main silencer pipe 210. Its internal pressure pulsation energy (sound energy) continues to propagate forward through the silencer structure 100 and enters the pipe 150 to the right of the baffle 220. A portion of the pressure pulsation energy (sound energy) is incident on the right side 224 of the baffle 220 between the main silencer 210 and the pipe 150. Similarly, after the incident sound wave hits the right side 224 of the baffle 220, it is emitted to form a reflected sound wave. Due to the phase difference between the reflected sound wave and the incident sound wave, interference cancellation occurs, which reduces another part of the sound energy, thereby further reducing the sound energy transmitted downstream.

[0038] The first length L1 of the first main silencing section 211 and the second length L2 of the second main silencing section 212 of the main silencer duct 210 are determined by the wavelength λ of the sound to be silenced. As an example, the relationship between the first length L1, the second length L2, and the wavelength of the sound to be silenced satisfies:

[0039] L1=(0.85~1.15)×1 / 4×λ1; L2=(0.85~1.15)×1 / 4×λ2.

[0040] Wherein, λ1 represents the first wavelength silenced by the first main silencing section 211, and λ2 represents the second wavelength silenced by the second main silencing section 212. In other words, when the wavelength of the sound does not satisfy the above relationship with the first length L1 and the second length L2, the sound will not be silenced by the silencing structure 100. Furthermore, in this embodiment, the first length L1 and the second length L2 are equal, and the first main silencing section 211 and the second main silencing section 212 in this embodiment are used to reduce the sound with the same wavelength λ1. That is, the sound with the first wavelength λ1 generated by the fluid entering the space between the main silencing pipe 210 and the pipe 150 is reduced on the left side of the baffle 220, while the sound with the first wavelength λ1 generated by the fluid flowing through the main silencing pipe 210 is reduced on the right side of the baffle 220. This embodiment is particularly suitable for situations where the sound that needs to be reduced in the pipe 180 accounts for a large proportion of the total sound.

[0041] It should be noted that the diameter of the main silencer pipe 210 is unrelated to the wavelength of the sound to be reduced. However, the diameter of the main silencer pipe 210 affects the pressure drop of the fluid and the amount of noise reduction. If the diameter of the main silencer pipe 210 is too small, the pressure drop generated when the fluid flows through the main silencer pipe 210 will be too large, resulting in a significant performance degradation, which may prevent the high-performance requirements of the refrigeration system from being met. Considering this requirement, when designing piping 180, designers typically control the ratio of the outer diameter of the main silencer pipe 210 to the inner diameter of the pipe 150 between 0.5 and 0.9.

[0042] Figures 4 to 9 These are other embodiments of the pipeline described in this application, the main difference being the noise reduction structure within the pipeline. For ease of explanation, Figures 4 to 9 Pipes 450, 550, 650, 750, 850, and 950 are schematically shown using dashed lines. These pipes are the same as or similar to pipe 150. Specific details regarding the sound-absorbing structure will be provided below.

[0043] Figure 4 This is a perspective view of a second embodiment of the conduit 480 according to this application. Figure 4 As shown, unlike the first embodiment, the baffle 420 of the silencing structure 400 is not located in the middle of the main silencing pipe 410. That is, the length of the first main silencing section 411 located on the left side 421 of the baffle 420 is not equal to the length of the second main silencing section 412 located on the right side 422 of the baffle 420. More specifically, the length of the first main silencing section 411 is greater than the length of the second main silencing section 412. The length of the first main silencing section 411 corresponds to a sound with a first wavelength, and the length of the second main silencing section 412 corresponds to a sound with a second wavelength; that is, the silencing structure 400 can reduce two different wavelengths of sound. The pipe 480 of this embodiment is suitable for reducing two sounds of different wavelengths but with similar proportions in a sound source.

[0044] Figure 5 This is a perspective view of the third embodiment of the conduit 580 according to this application. Figure 5 As shown, unlike the first embodiment, the silencing structure 500 does not have a second silencing section. In this embodiment, the baffle 520 is arranged around the right end of the main silencing pipe 510, and the right end of the main silencing pipe 510 passes through but does not extend beyond the right side 524 of the baffle 520. That is, the main silencing pipe 510 only extends to the left side 521 of the baffle 520. The silencing structure 500 can only silence the sound passing through it once, but compared with the first and second embodiments, the above-mentioned arrangement of the baffle 520 of the silencing structure 500 makes it easier to fix it to the pipe 550, thereby facilitating the installation of the silencing structure 500. In addition, the silencing structure 500 is particularly suitable for installation near elbows, tees, etc. in adjacent pipelines.

[0045] Figure 6 This is a perspective view of the fourth embodiment of the conduit 680 according to this application. Figure 6 As shown, unlike the third embodiment, the main silencer pipe 610 is eccentrically positioned relative to the baffle 620 and the pipe 650. That is, the axis X of the main silencer pipe 610 does not coincide with the axis Y of the baffle 620 and the axis Z of the pipe 650. More specifically, the axis Y of the baffle 620 coincides with the axis Z of the pipe 650, and the axis X of the main silencer pipe 610 is parallel to the axis Y of the baffle 620 and the axis Z of the pipe 650, but offset from them by a certain distance.

[0046] When sound frequencies exceed a certain threshold, it does not propagate as a plane wave within the pipe. Viewed radially from pipe 650, the sound distribution across each cross-section is different. By eccentrically positioning the main silencer pipe 610, sound waves cannot pass directly through the silencer structure 600 in a narrow beam, thus increasing the upper frequency limit for silencer operation. In other words, fewer sound waves pass through the main silencer pipe 610, while more impact the baffle 620, resulting in more sound being silenced by the silencer structure 600 and improving the silencing effect of pipe 680.

[0047] Figure 7 This is a perspective view of the fifth embodiment of the conduit 780 according to this application. Figure 7As shown, unlike the first embodiment, the silencing structure 700 also includes an auxiliary silencing pipe 730. The auxiliary silencing pipe 730 is coaxial with the main silencing pipe 710 and extends to the left side 721 of the baffle 720. The inner diameter of the auxiliary silencing pipe 730 is larger than the outer diameter of the main silencing pipe 710. In other words, the auxiliary silencing pipe 730 is fitted outside the first main silencing section 711 of the main silencing pipe 710, and the inner wall of the auxiliary silencing pipe 730 is spaced apart from the outer wall of the first main silencing section 711. The right end of the auxiliary silencing pipe 730 does not penetrate the baffle 720 but abuts against the left side 723 of the baffle 720. Of course, the auxiliary silencer pipe 730 can also extend to the right side 722 of the baffle 720, but the left end of the auxiliary silencer pipe 730 does not penetrate the baffle 720, but abuts against the right side 724 of the baffle 720; the auxiliary silencer pipe 730 can also have portions extending independently to the left side 721 and right side 722 of the baffle 720, but does not have a portion penetrating the baffle 720. That is to say, the auxiliary silencer pipe 730 consists of two independent pipes, one end of which abuts against the left side 723 and right side 724 of the baffle 720 respectively, and extends away from the baffle 720.

[0048] The silencing principle of the auxiliary silencer 730 is the same as that of the main silencer 710. The length of the auxiliary silencer 730 is determined by the wavelength of the additional sound to be silenced. Generally, the sound to be silenced by the auxiliary silencer 730 is different from the sound to be silenced by the main silencer 710. In this embodiment, the above arrangement of the conduit 780 enables it to silence three different wavelengths of sound, or two different wavelengths of sound. Specifically, when the lengths of the first main silencer section 711, the second main silencer section 712, and the auxiliary silencer 730 are all unequal, the conduit 780 can silence three different wavelengths of sound; when the length of the first main silencer section 711 is equal to the length of the second main silencer section 712 but not equal to the length of the auxiliary silencer 730, the conduit 780 can silence two different wavelengths of sound. The conduit 780 of this application is suitable for situations where space is limited and multiple sounds need to be silenced.

[0049] Figure 8 This is a perspective view of the sixth embodiment of the conduit 880 according to this application. Figure 8As shown, unlike the fifth embodiment, the auxiliary silencer pipe 830 of the silencer structure 800 is not coaxially sleeved outside the main silencer pipe 810, but is disposed on one side of the main silencer pipe 810. Specifically, the main silencer pipe 810 is eccentrically disposed on the baffle 820, which provides sufficient space in the baffle 820 for installing the auxiliary silencer pipe 830. The axis W of the auxiliary silencer pipe 830 is parallel to the axis X of the main silencer pipe 810 and is spaced apart from each other by a certain distance. The auxiliary silencer pipe 830 extends to the left side 821 of the baffle 820, and the right end of the auxiliary silencer pipe 830 does not penetrate the baffle 820, but abuts against the left side 823 of the baffle 820. Of course, the auxiliary silencer pipe 830 can also extend to the right side 822 of the baffle 820, but the left end of the auxiliary silencer pipe 830 does not penetrate the baffle 820, but abuts against the right side 824 of the baffle 820; the auxiliary silencer pipe 830 can also have portions extending to the left side 821 and right side 822 of the baffle 820 respectively, but does not have a portion penetrating the baffle 820. The ratio of the outer diameter of the auxiliary silencer pipe 830 to the inner diameter of the pipe 850 can be determined as needed, and does not need to be controlled between 0.5 and 0.9. Similar to the fifth embodiment, the above arrangement of the pipe 880 enables it to silence three different wavelengths of sound, or to silence two different wavelengths of sound.

[0050] Figure 9 This is a perspective view of the seventh embodiment of the conduit 980 according to this application. Figure 9 As shown, unlike the sixth embodiment, the auxiliary silencer pipe 930 of the silencer structure 900 is disposed through the baffle 920. Specifically, the axis W of the auxiliary silencer pipe 930 is parallel to the axis X of the main silencer pipe 910 and is spaced apart from each other by a certain distance. The baffle 920 is provided with an auxiliary silencer hole (not shown) for mounting the auxiliary silencer pipe 930. The auxiliary silencer pipe 930 is fixedly connected to the baffle 920 through the auxiliary silencer hole, so that the baffle 920 is also disposed around the auxiliary silencer pipe 930. Of course, the auxiliary silencer pipe 930 can also extend to the left side 921 of the baffle 920, and the right end of the auxiliary silencer pipe 930 passes through but does not extend out of the right side 924 of the baffle 920; or the auxiliary silencer pipe 930 can also extend to the right side 922 of the baffle 920, and the left end of the auxiliary silencer pipe 930 passes through but does not extend out of the left side 923 of the baffle 920.

[0051] Figure 10A This is a perspective view of the eighth embodiment of the pipeline 1080 according to this application. Figure 10B yes Figure 10A The pipe 1080 shown runs along Figure 10A A sectional view cut along line AA. (Example) Figure 10A and 10B As shown, with Figure 1A and 1BThe difference lies in the fact that two silencing structures 100 and 500 are connected in series between the silencing sections 1052 of the pipe 1050. Specifically, viewed axially from the silencing section 1052 of the pipe 1050, silencing structures 100 and 500 are sequentially arranged within the silencing section 1052. The lengths of silencing structures 100 and 500 are different. When sound passes through silencing structure 100, a portion of the first wavelength and / or second wavelength of sound can be reduced. After exiting silencing structure 100, the sound enters silencing structure 500, where a portion of the third wavelength and / or fourth wavelength of sound is further reduced. Therefore, the above arrangement of the pipe 1080 can reduce sound of multiple wavelengths. Those skilled in the art will understand that three or more silencing structures of this application can also be connected in series within the silencing section 1052 of the pipe 1050 to reduce even more wavelengths of sound. Alternatively, several identical silencing structures of this application may be connected in series in the silencing section 1052 of the pipe 1050 to enhance the reduction of sound at specific wavelengths in the sound.

[0052] In conjunction with the above embodiments of this application, compared with the prior art, the pipe 180 does not have an expansion section with an increased diameter. The noise-reducing structure can be directly installed in the pipe to reduce the noise of the fluid flowing through it, without the need for an expansion section. With this arrangement, the diameter of the entire pipe can be largely uniform when viewed from the outside, eliminating the need for a sudden increase in diameter. This allows for a more compact and economical arrangement of the pipe 180. This is particularly useful in applications such as air conditioning systems, where there are numerous piping components and very limited space for their placement, especially given the current demands for compact design in air conditioning systems. In the same space, the pipe of this application occupies less space, allowing for the placement of more other equipment. Furthermore, if no other equipment is needed, the smaller space occupied by the pipe contributes to a more compact overall design. Furthermore, by using the pipe 180 of this application, there is no need to modify the existing pipes of the device (e.g., air conditioning compressor), because there is no need to insert or add an expansion part that directly increases in size. It is only necessary to embed the sound-absorbing structure into the existing pipes, thus making it more convenient to use while meeting the sound-absorbing requirements.

[0053] Furthermore, the pipeline of this application can be configured with one or more silencer sections (e.g., setting auxiliary silencer pipes, connecting multiple silencer structures in series, etc.) according to the type of wavelength of the sound to be reduced (e.g., two or more wavelengths), thus enabling wider application depending on the needs of the usage scenario.

[0054] Furthermore, the pipeline in this application, by eccentrically positioning the silencer pipe relative to the main pipe, maximizes the overlap between areas with higher levels of fluid sound waves and areas where the baffles silence the sound. This allows more sound to be blocked by the baffles of the silencing structure, thus achieving noise reduction. In other words, without adding any extra components, the noise reduction effect of the pipeline can be enhanced simply by eccentrically positioning the silencer pipe relative to the main pipe.

[0055] Alternatively, this application can utilize the inherent flange structure of the pipeline (e.g., the location where two pipeline sections meet) to clamp and fix the baffle 220, thereby installing the silencing structure 100. This installation method also eliminates the need to add additional structures to the existing pipeline equipment, and furthermore, it facilitates the disassembly and maintenance of the silencing structure.

[0056] Although this application will be described with reference to the specific embodiments shown in the accompanying drawings, it should be understood that the piping of this application can have many variations without departing from the spirit, scope, and context of the teachings of this application. Those skilled in the art will also recognize that there are different ways to modify the structural details of the embodiments disclosed in this application, all of which fall within the spirit and scope of this application and the claims.

Claims

1. A pipeline with a sound-absorbing structure, characterized in that: include: A duct, comprising a silencer section, an intake section extending away from the silencer section, and an outlet section extending away from and opposite the intake section, and having a uniform diameter along its entire length, wherein the duct has an inlet located in the intake section and an outlet located in the outlet section; and The noise reduction structure includes: Main silencer; and A baffle is disposed around and connected to the main muffler pipe, the baffle including opposing first and second sides; wherein the main muffler pipe extends from the first and / or second side of the baffle. The main silencer pipe of the silencing structure is disposed in the silencing section of the pipeline and is connected to the pipeline via the baffle. The baffle is configured to prevent fluid from flowing through the space between the pipeline and the main silencer pipe. The main silencer pipe is in fluid communication with both the pipe inlet and the pipe outlet, so that fluid entering the pipe flows out of the pipe through the main silencer pipe. The main silencer pipe extends a first length L1 on the first side of the baffle and a second length L2 on the second side of the baffle. The first length L1 and the second length L2 are not equal. The first length L1 is determined based on the first wavelength λ1 of the sound to be eliminated, and the relationship between the first length L1 and the first wavelength λ1 satisfies: L1 = (0.85~1.15) × 1 / 4 × λ1; The second length L2 is determined based on the second wavelength λ2 of the sound to be eliminated, and the relationship between the second length L2 and the second wavelength λ2 satisfies: L2 = (0.85~1.15) ×1 / 4×λ2.

2. The pipeline according to claim 1, characterized in that: The baffle is annular and has an inner diameter and an outer diameter. The inner diameter matches the outer diameter of the main silencer pipe, and the outer diameter is greater than or equal to the inner diameter of the pipe.

3. The pipeline according to claim 1, characterized in that: The axis of the main silencer pipe is parallel to the axis of the pipe, and the axis of the main silencer pipe is offset from the axis of the pipe.

4. The pipeline according to claim 1, characterized in that: Also includes: An auxiliary silencer extends on a first and / or second side of the baffle, and the auxiliary silencer may selectively penetrate the baffle or not.

5. The pipeline according to claim 4, characterized in that: The auxiliary silencer pipe is sleeved outside the main silencer pipe, and the inner wall of the auxiliary silencer pipe is spaced apart from the outer wall of the main silencer pipe.

6. The pipeline according to claim 1, characterized in that: The ratio of the outer diameter of the main silencer pipe to the inner diameter of the pipe is 0.5 to 0.

9.

7. The pipeline according to claim 1, characterized in that: include: Several noise-reducing structures are sequentially arranged in the pipe.

8. The pipeline according to claim 1, characterized in that: The pipe does not have an expansion joint.

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