Pipeline noise reduction device
By employing an Archimedes spiral arrangement of through-holes in the pipeline noise reduction device, the stability of medium flow is improved, solving the problem of poor noise reduction effect in the existing technology and achieving better noise reduction effect and flow control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-06
AI Technical Summary
Existing pipeline noise reduction devices are unable to improve flow stability during media flow, resulting in poor noise reduction performance.
A spiral flow channel network is formed by arranging a central first through hole and multiple second through holes arranged along the Archimedean spiral on an orifice plate, which optimizes the flow pattern of the medium and improves flow stability through non-uniform arrangement.
It effectively reduces noise, improves the stability of medium flow, enhances the noise reduction effect, reduces eddy current and resonance noise, increases the frictional contact area between the fluid and the wall, and consumes more sound energy.
Smart Images
Figure CN223975736U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of pipeline noise reduction technology, specifically to a pipeline noise reduction device. Background Technology
[0002] In natural gas stations, the flow of gas within pipelines generates aerodynamic noise. This aerodynamic noise has several adverse effects. On the one hand, it can induce forced vibrations in the pipeline and its accessories, thereby damaging the pipeline structure and affecting its normal operation and service life. On the other hand, it can cause noise pollution, posing a threat to the health of personnel at the station and in the surrounding area. Therefore, developing effective pipeline noise reduction devices and technologies has significant engineering application value.
[0003] Currently, in common porous noise reduction plates, the flow-limiting holes are generally arranged in a uniform pattern, such as a ring array or a rectangular array. However, this uniform arrangement is difficult to effectively improve the overall stability of the medium flow during the flow process, and the noise reduction effect needs to be improved. Utility Model Content
[0004] The purpose of this disclosure is to provide a pipeline noise reduction device that can improve the overall flow stability of the medium, thereby attenuating the noise and achieving the purpose of noise reduction.
[0005] To achieve the above objectives, this disclosure provides a pipeline noise reduction device, including an orifice plate, on which a first through hole and a second through hole are arranged. The first through hole is located at the center of the orifice plate, and there are multiple second through holes arranged along an Archimedean spiral.
[0006] Optionally, the second through hole located at the pole of the Archimedean spiral has a first preset distance i between it and the first through hole, wherein the value of i is in the range of 14mm < i < 18mm; and there is a second preset distance j between two adjacent second through holes, wherein the value of j is in the range of 14mm < i < 18mm.
[0007] Optionally, both the first preset distance and the second preset distance are 16mm.
[0008] Optionally, the outer diameter of the orifice plate is adapted to the inner diameter of the pipe to be installed.
[0009] Optionally, the number of orifice plates is one or two. When the number of orifice plates is two, the pipe noise reduction device further includes a hollow cylinder, and the two orifice plates are respectively welded to both ends of the hollow cylinder.
[0010] Optionally, a flange is provided on the outer side of the orifice plate, and the pipe to be installed has a first pipe and a second pipe that are connected to each other, and the flange abuts against both the first pipe and the second pipe.
[0011] Optionally, the pipe noise reduction device further includes gaskets, which are provided between the flange and the first pipe, and between the flange and the second pipe.
[0012] Optionally, the first pipe and the second pipe are detachably connected by a flange bolt assembly.
[0013] Through the above technical solution, in the pipeline noise reduction device provided in this disclosure, a first through hole and multiple second through holes are arranged on the orifice plate. The multiple second through holes are arranged along the Archimedean spiral. Due to the characteristics of the spiral, when the medium passes through the orifice plate, it will gradually diffuse along the spiral trajectory, avoiding the sudden changes and turbulence that may occur in the medium flow under the uniform arrangement, making the medium flow smoother and more stable, that is, improving the overall stability of the medium flow. This improvement in flow stability can effectively attenuate the noise and achieve a better noise reduction effect.
[0014] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0015] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0016] Figure 1 This is a schematic diagram of the structure of the orifice plate of the pipeline noise reduction device provided in the embodiments of this disclosure;
[0017] Figure 2 This is a schematic diagram of the structure of the pipeline noise reduction device provided in the embodiments of this disclosure;
[0018] Figure 3 This is an installation diagram of the pipeline noise reduction device provided in the embodiments of this disclosure;
[0019] Figure 4 This is another installation schematic diagram of the pipeline noise reduction device provided in the embodiments of this disclosure.
[0020] Explanation of reference numerals in the attached figures
[0021] 1. Orifice plate; 10. Archimedes spiral; 11. First through hole; 12. Second through hole; 13. Flange; 2. Pole; 3. Pipe to be installed; 31. First pipe; 32. Second pipe; 4. Hollow cylinder; 5. Gasket; 6. Flange connection bolt assembly. Detailed Implementation
[0022] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0023] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are used relative to the contour of the corresponding component itself. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.
[0024] According to exemplary embodiments of this disclosure, reference is made to Figure 1 As shown, a pipe noise reduction device is provided, including an orifice plate 1. The orifice plate 1 has a first through hole 11 and a second through hole 12 arranged on it. The first through hole 11 is located at the center of the orifice plate 1, and there are multiple second through holes 12 arranged along the Archimedean spiral 10.
[0025] Through the above technical solution, in the pipeline noise reduction device provided in this disclosure, a first through hole 11 and a plurality of second through holes 12 are arranged on the orifice plate 1. The plurality of second through holes 12 are arranged along the Archimedean spiral 10. Due to the characteristics of the Archimedean spiral 10, when the medium passes through the orifice plate 1, it will gradually diffuse along the trajectory of the Archimedean spiral 10, avoiding the sudden changes and disturbances that may occur in the medium flow under the uniform arrangement, making the medium flow smoother and more stable, that is, improving the overall stability of the medium flow. This improvement in flow stability can effectively attenuate the noise and achieve a better noise reduction effect.
[0026] In this disclosure, the polar coordinate equation of the Archimedes spiral 10 is: r = a + b × θ, where r is the polar radius, θ is the polar angle, and a and b are constants. The first through hole 11 is located at the center of the orifice plate 1 and is arranged separately to form the initial channel for medium flow. The presence of the central through hole (i.e. the first through hole 11) can avoid fluid stagnation in the central region caused by the layout of the Archimedes spiral 10.
[0027] In the above technical solution, since multiple second through holes 12 are arranged along the Archimedean spiral 10, the distance between the second through holes 12 and the center of the orifice plate 1 can be linearly increased with the increase of the polar angle through the non-uniform Archimedean spiral 10 layout, forming a spiral flow channel network that gradually expands from the center outward. This makes the radial flow velocity and the circumferential flow velocity form a continuously changing vector synthesis when the medium flows through the second through holes 12, avoiding the eddies caused by sudden changes in flow velocity in the uniform array.
[0028] Furthermore, the non-uniform through-holes cause non-periodic disturbances when the fluid passes through, dispersing the concentrated noise energy over a wider frequency range and reducing the noise peak at specific frequencies (such as eliminating narrowband noise caused by resonance in a uniform array). In addition, the Archimedes spiral 10 can guide the fluid to flow along a curved trajectory, increasing the frictional contact area between the fluid and the wall of the orifice plate 1, and consuming more sound energy through viscous dissipation, thereby achieving the purpose of noise reduction.
[0029] In the specific embodiments provided in this disclosure, reference is made to Figure 1 As shown, the second through hole 12 located at the pole 2 of the Archimedean spiral 10 has a first preset distance i between it and the first through hole 11, where the value of i can be in the range of 14mm < i < 18mm, and for example, i can be 15mm, 16mm or 17mm; there is a second preset distance j between two adjacent second through holes 12, where the value of j can be in the range of 14mm < i < 18mm, and for example, j can be 15mm, 16mm or 17mm. In the above technical solution, the second through hole 12 at the pole 2 is the first through hole of the Archimedean spiral 10, and the distance between it and the first through hole 11 determines the density of the initial segment of the Archimedean spiral 10. By limiting the range of i and j, the orifice plate 1 has a suitable opening ratio (i.e., the ratio of the total area of the first through hole 11 and multiple second through holes 12 to the area of the orifice plate 1), which avoids high voltage drop caused by too low an opening ratio and prevents the noise reduction effect from being weakened by too high an opening ratio.
[0030] In the specific embodiments provided in this disclosure, reference is made to Figure 1 As shown, both the first and second preset distances can be 16mm. Using a fixed spacing of 16mm facilitates CNC machining of the orifice plate 1 (such as laser drilling), eliminating the need to adjust parameters according to different pipe sizes, thus reducing production costs. At the same time, the orifice plate 1 of uniform specifications can be used in different projects, improving the compatibility of spare parts.
[0031] In one exemplary embodiment, the diameter D of the optional through hole is 9mm, a is 16, b is 2.547, and the first preset distance and the second preset distance are both set to 16mm. At this time, a spiral trajectory with uniform pitch and moderate coverage can be formed, which can take into account both flow diffusion efficiency and sound energy dissipation effect, and has a better noise reduction effect.
[0032] In the specific embodiments provided in this disclosure, reference is made to Figure 3 and Figure 4 As shown, the outer diameter of the orifice plate 1 can be adapted to the inner diameter of the pipe 3 to be installed. This facilitates the installation of the device inside the pipe 3 for use.
[0033] In the specific embodiments provided in this disclosure, reference is made to Figures 2 to 4 As shown, the number of orifice plates 1 can be one or two. When the number of orifice plates 1 is two, the pipeline noise reduction device also includes a hollow cylinder 4. The two orifice plates 1 are respectively welded to the two ends of the hollow cylinder 4. The outer diameter of the hollow cylinder 4 is adapted to the inner diameter of the pipeline 3 to be installed. When the number of orifice plates 1 is one, one orifice plate 1 can be used alone and directly installed between the flanges of the pipeline 3 to be installed. This is suitable for scenarios with limited space or low noise reduction requirements.
[0034] When there are two orifice plates 1, a double orifice plate structure is formed. The double orifice plate structure forms a two-stage diffusion noise reduction through the series connection of two orifice plates 1. The medium passes through the through holes of the two orifice plates 1 in sequence and undergoes two diffusions, which helps to improve the noise reduction effect. Here, when the pipeline needs to be installed horizontally or vertically, the symmetry of the double orifice plate structure can balance the fluid force and reduce the impact of lateral force on the pipeline.
[0035] In the specific embodiments provided in this disclosure, reference is made to Figures 2 to 4 As shown, a flange 13 is provided on the outer side of an orifice plate 1. The pipe to be installed 3 has a first pipe 31 and a second pipe 32 that are connected to each other. The flange 13 abuts against both the first pipe 31 and the second pipe 32. In the above technical solution, the first pipe 31 and the second pipe 32 can be detachably connected by a flange connecting bolt group 6, which facilitates installation and maintenance. The flange 13 can be an annular flange coaxial with the orifice plate 1. The rigid abutment between the flange 13 and the end faces of the first pipe 31 and the second pipe 32 can effectively transmit impact force and prevent the weld from cracking due to axial movement of the orifice plate 1.
[0036] In this disclosure, flange 13 serves as a positioning reference and can be automatically aligned by the preload of the flange bolt assembly, eliminating the need for additional measuring tools, thus shortening on-site installation time and improving the ease of installation of this device.
[0037] In the specific embodiments provided in this disclosure, reference is made to Figure 3 and Figure 4 As shown, the pipeline noise reduction device also includes gaskets 5. Gaskets 5 are provided between flange 13 and the first pipeline 31, and between flange 13 and the second pipeline 32. The elastic compression of gaskets 5 can compensate for the roughness of the pipeline flange surface and installation errors, and form a dense sealing layer under the action of bolt preload. Gaskets 5 can be metal spiral wound gaskets or rubber asbestos gaskets, and the appropriate type can be selected according to the medium temperature and pressure.
[0038] The pipeline noise reduction device disclosed herein can be directly installed on gas transmission pipelines connected by flanges, such as gas transmission pipelines with shut-off valves, pressure regulating valves or flow valves, or installed before manifolds. This disclosure does not impose any specific limitations on this.
[0039] The following example illustrates the installation method of the pipeline noise reduction device disclosed herein, using two orifice plates 1 as an example:
[0040] Reference Figure 3 As shown in the figure, firstly, the flange connection bolt group 6 is disassembled, and one of the first pipe 31 and the second pipe 32 is removed;
[0041] Next, install gasket 5 at the pipe joint;
[0042] Then, the hollow cylinder 4 with perforated plates 1 welded to both ends is placed in the other of the first pipe 31 and the second pipe 32, so that the flange 13 is located at the pipe interface.
[0043] Next, install another gasket 5 at the pipe joint;
[0044] Finally, install the disassembled pipes, ensuring that gaskets 5 are installed between flange 13 and the first pipe 31, and between flange 13 and the second pipe 32. Tighten the flange connection bolt group 6 to ensure the sealing of the pipes and the firmness of the connection. The installation is now complete.
[0045] Reference Figure 4 As shown, when the orifice plate 1 of this disclosure is used alone as a pipeline noise reduction device (i.e., when the number of orifice plates 1 is one), the installation method is the same as when the number of orifice plates 1 is two, and will not be repeated here.
[0046] The pipeline noise reduction device disclosed herein, through the combined design of the first through hole 11 and the second through hole 12, not only retains the flow restriction function of the ordinary orifice plate 1, but also optimizes the flow pattern through the Archimedes spiral 10 layout. In addition, this structure can directly replace the ordinary orifice plate 1 in the existing pipeline without changing the inner diameter of the pipeline or the flange interface size, thus reducing the difficulty of modification.
[0047] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0049] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A pipe noise reduction device, characterized by, The application relates to a pipeline noise reduction device, which comprises a hole plate (1), wherein a first through hole (11) is arranged at the center of the hole plate (1), and a plurality of second through holes (12) are arranged along an Archimedes spiral line (10).
2. The pipe noise reduction device of claim 1, wherein, The first preset distance i between the second through hole (12) at the pole point (2) of the Archimedes spiral line (10) and the first through hole (11) is 14mm 3. The pipe noise reduction device of claim 2, wherein, The first preset distance and the second preset distance are both 16mm.
4. The pipe noise reduction device of any one of claims 1 to 3, wherein, The outer diameter of the hole plate (1) is matched with the inner diameter of a pipeline (3) to be installed.
5. The pipe noise reduction apparatus of claim 4, wherein, The number of the hole plate (1) is one or two, and when the number of the hole plate (1) is two, the pipeline noise reduction device further comprises a hollow cylinder (4), and two hole plates (1) are respectively welded at two ends of the hollow cylinder (4).
6. The pipe noise reduction apparatus of claim 5, wherein, A flange (13) is arranged on the outer side of the hole plate (1), the pipeline (3) to be installed has a first pipeline (31) and a second pipeline (32) in abutment, and the flange (13) is in abutment with the first pipeline (31) and the second pipeline (32).
7. The pipe noise reduction apparatus of claim 6, wherein, The pipeline noise reduction device further comprises a gasket (5), and the gasket (5) is arranged between the flange (13) and the first pipeline (31) and between the flange (13) and the second pipeline (32).
8. A pipe noise reduction device according to claim 6 or 7, characterised in that, The first pipeline (31) and the second pipeline (32) are detachably connected through a flange connection bolt group (6).