Rectifying assembly, flow meter, rectifying device and flow meter device

Abstract

This application provides a rectifier assembly, a flow meter, a rectifier device, and a flow meter apparatus, relating to the field of rectification technology. The rectifier assembly includes a first rectifier element and a flow guide shroud. Along a first direction, the rectifier assembly has a first end and a second end. One end of the first rectifier element is disposed inside the flow guide shroud. Along a second direction, a first gap exists between the flow guide shroud and the inner wall of the fluid flow channel, and a second gap exists between the flow guide shroud and the first rectifier element. The interior of the flow guide shroud has a first cavity, which at least includes the area where the second gap is located. The first cavity and the area where the first gap is located are connected through an opening in the flow guide shroud. The first rectifier element includes a plurality of first rectifier holes disposed inside the flow guide shroud. The rectifier assembly, flow meter, rectifier device, and flow meter apparatus provided in this application can effectively rectify the flow field, making the flow field entering the metering section stable and uniform, thereby improving metering accuracy.

Description

Technical Field

[0001] This application relates to the field of rectification technology, and in particular to a rectification component, flow meter, rectification device and flow meter device. Background Technology

[0002] Ultrasonic flow meters measure flow rate by detecting the effect of fluid flow on an ultrasonic beam (or ultrasonic pulse). The accuracy of ultrasonic flow meters is highly correlated with the distribution of the gas flow field. During operation, factors such as bends in the pipeline, flow control valves, pressure regulating devices, or external pressure influences cause fluctuations in the fluid flow, making it difficult for the gas flow field to reach a stable state. This means that the actual gas flow field distribution deviates significantly from the ideal distribution, thus reducing the accuracy of the ultrasonic flow meter. Therefore, improving the accuracy of ultrasonic flow meters has become a pressing issue. Summary of the Invention

[0003] This application provides a rectifier assembly, flow meter, rectifier device, and flow meter apparatus, which can improve measurement accuracy.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, this application provides a rectifier assembly for placement inside a fluid flow channel. The rectifier assembly includes a first rectifier element and a flow guide shroud. The axial direction of the rectifier assembly is defined as a first direction. Along this first direction, the rectifier assembly has a first end and a second end. The closed end of the flow guide shroud is near the first end, and the opening of the flow guide shroud is near the second end. One end of the first rectifier element is disposed inside the flow guide shroud. A second direction is defined as a direction perpendicular to the axial direction of the rectifier assembly. Along this second direction, a first gap exists between the flow guide shroud and the inner wall of the fluid flow channel, and a second gap exists between the flow guide shroud and the first rectifier element. The interior of the flow guide shroud has a first cavity, which at least includes the area where the second gap is located. The first cavity and the area where the first gap is located communicate through the opening of the flow guide shroud. The first rectifier element includes a plurality of first rectifier holes disposed inside the flow guide shroud.

[0006] In one possible implementation of the above-mentioned rectifier assembly, the interior of the shroud has a second cavity, the second cavity including at least the area between the closed end of the shroud and the first rectifier, the first cavity and the second cavity are in communication, and the cross-sectional area of ​​at least a portion of the second cavity gradually increases along the direction from the first end to the second end.

[0007] In one possible implementation of the above-mentioned rectifier assembly, the first rectifier includes a cylindrical portion, the closed end of which is disposed inside the shroud. Along the first direction, the second cavity is located between the closed end of the shroud and the closed end of the cylindrical portion. The closed end of the cylindrical portion and the sidewall of the cylindrical portion have the first rectifier hole.

[0008] In one possible implementation of the above-described rectifying component, the first rectifying element further includes an annular portion disposed outside the flow guide and connected to the open end of the cylindrical portion. The inner hole of the annular portion is used to discharge fluid from the interior of the cylindrical portion. The diameter of the inner hole gradually increases along the direction from the first end to the second end, and the diameter of the smaller end of the inner hole is the same as the inner diameter of the open end of the cylindrical portion.

[0009] In one possible implementation of the above-mentioned rectifier assembly, the shroud includes an arc-shaped head and a tubular portion. The arc-shaped head includes a hemispherical segment and a conical tube segment. The hemispherical segment is connected to the small end of the conical tube segment and is close to the first end. The large end of the conical tube segment is connected to one end of the tubular portion, and the other end of the tubular portion is close to the second end.

[0010] In one possible implementation of the above-described rectifying assembly, the rectifying assembly further includes a second rectifying element, which is sleeved on the outer wall of the first rectifying element and contacts the flow guide. The second rectifying element includes a plurality of second rectifying holes, and the region where the first gap is located communicates with the first cavity through the plurality of second rectifying holes.

[0011] In one possible implementation of the above-described rectifying assembly, the rectifying assembly further includes at least one of a third rectifying element and a silencer. The third rectifying element is disposed outside the flow guide shroud and near its closed end, close to the first end. The third rectifying element includes multiple third rectifying holes for allowing fluid to enter the region where the first gap is located. The silencer is fitted onto the outer wall of the flow guide shroud and contacts both the outer wall of the flow guide shroud and the inner wall of the fluid flow channel. The silencer includes a silencing channel, through which the region where the first gap is located communicates with the first cavity.

[0012] In one possible implementation of the above-described rectifying assembly, the fluid flow channel includes a first flow channel segment, a second flow channel segment, and a third flow channel segment connected sequentially along the first direction. Along the direction from the first end to the second end, the inner diameter of the second flow channel segment gradually increases, and the inner diameter of the first flow channel segment is smaller than the inner diameter of the third flow channel segment. The rectifying assembly includes the third rectifying element and the silencer. The third rectifying element is fixedly connected to the closed end of the flow guide shroud and disposed inside the first flow channel segment. The outer diameter of the third rectifying element is smaller than the outer diameter of the silencer, and the silencer is disposed inside the third flow channel segment.

[0013] Secondly, this application also provides a flow meter, including a flow meter body and a rectifier assembly as described in any of the first aspects. The flow meter body has a fluid channel for supplying fluid flow, and the rectifier assembly is disposed inside the fluid channel, with a first end of the rectifier assembly near the inlet of the fluid channel.

[0014] Thirdly, this application also provides a rectification device, including a rectification housing and a rectification assembly as described in any of the first aspects. The inner wall of the rectification housing defines a fluid flow channel for accommodating the rectification assembly.

[0015] Fourthly, this application also provides a flow meter device, including a flow meter and a rectifier as described in the third aspect. The inlet of the flow meter is connected to the outlet of the rectifier.

[0016] This application provides a rectifier assembly, a flow meter, a rectifier device, and a flow meter apparatus. The rectifier assembly is disposed inside a fluid flow channel and includes a first rectifier element and a flow guide shroud. Along a first direction, the rectifier assembly has a first end and a second end. The closed end of the flow guide shroud is near the first end, and the opening of the flow guide shroud is near the second end. One end of the first rectifier element is disposed inside the flow guide shroud. Along a second direction, a first gap exists between the flow guide shroud and the inner wall of the fluid flow channel, and a second gap exists between the flow guide shroud and the first rectifier element. The interior of the flow guide shroud has a first cavity, which at least includes the area where the second gap is located. The first cavity and the area where the first gap is located are connected through the opening of the flow guide shroud. The first rectifier element includes a plurality of first rectifier holes disposed inside the flow guide shroud. The path of the fluid in the fluid flow channel through the rectifier assembly is as follows: along the direction from the first end to the second end, the fluid first enters the first gap and then enters the second gap through the opening of the flow guide shroud, finally exiting through the first rectifier holes. The fluid's path within the rectifying assembly resembles an S-shape, increasing the distance the fluid travels. This allows for better fluid morphology shaping and reduces the impact of external pressure fluctuations. Furthermore, after passing through the first rectifying orifice, vortices in the fluid are eliminated, resulting in a more uniform velocity distribution. Therefore, by defining an S-shaped path within the rectifying assembly, the flow field can be effectively shaped, ensuring a stable and uniform flow field entering the metering section, thereby improving metering accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a flow meter device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of a rectifier device provided in an embodiment of this application;

[0020] Figure 3 yes Figure 2 A cross-sectional view of the rectifier shown;

[0021] Figure 4 yes Figure 2 Exploded view of the rectifier shown;

[0022] Figure 5 yes Figure 2 A three-dimensional structural diagram of the first rectifier in the system;

[0023] Figure 6 yes Figure 2 A cross-sectional view of the first rectifier component in the system;

[0024] Figure 7 This is a three-dimensional structural diagram of the fairing and the third rectifier in section 2.

[0025] Figure 8 This is a front view of the fairing and the third rectifier in section 2.

[0026] Figure 9 yes Figure 2 A cross-sectional view of the fairing and the third rectifier fitting together;

[0027] Figure 10 yes Figure 2 A partial three-dimensional structural diagram of the muffler in the image;

[0028] Figure 11 This is a cross-sectional view of another rectifier device provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Rectifier;

[0031] 110. Rectifier housing; 111. Intermediate section; 112. Flange section; 113. Fluid flow channel; 1131. First flow channel section; 1132. Second flow channel section; 1133. Third flow channel section;

[0032] 120. Rectifier assembly;

[0033] 10. Flow deflector; 11. Tubular section; 12. Arc-shaped head; 121. Hemispherical section; 122. Conical section;

[0034] 20. First rectifier; 21. First rectifier orifice; 22. Cylindrical portion; 23. Annular portion; 24. Inner hole;

[0035] 30. Second rectifier; 31. Second rectifier orifice;

[0036] 40. Third rectifier; 41. Third rectifier aperture;

[0037] 50. Muffler; 51. Muffler channel; 52. Inner fitting; 53. Outer fitting; 54. First annular rectifier; 55. Second annular rectifier;

[0038] 60. First gap; 70. Second gap; 80. Second cavity;

[0039] 200. Flow meter. Detailed Implementation

[0040] The measurement accuracy of ultrasonic flow meters is highly correlated with the distribution of the gas flow field. During operation, factors such as bends in the pipeline, flow regulating valves, pressure regulating devices, and external pressure influences cause fluctuations in the fluid within the pipeline, making it difficult for the gas flow field to reach a stable state. This means that the actual gas flow field distribution deviates significantly from the ideal distribution, thus reducing the measurement accuracy of the ultrasonic flow meter. Therefore, improving the measurement accuracy of ultrasonic flow meters has become an urgent problem to be solved.

[0041] To achieve a better flow field and improve measurement accuracy, one approach in related technologies is to install a long upstream straight pipe section (at least 5 times the diameter) at the front end of the ultrasonic flow meter and a downstream straight pipe section 3 times the diameter. However, this method requires a large installation space; if the installation site is cramped, measurement accuracy cannot be guaranteed. Furthermore, the larger installation space significantly increases costs. Another approach is to install a flow rectifier on the ultrasonic flow meter, such as an orifice plate or honeycomb rectifier. However, this method only addresses a single flow field issue. For example, an orifice plate can effectively distribute flow velocity but cannot eliminate vortices, while a honeycomb rectifier can effectively eliminate vortices but has limited effect on flow velocity regulation, failing to regulate flow velocity while eliminating vortices.

[0042] In view of this, the present application provides a rectifier assembly 120, a flow meter 200, a rectifier device 100, and a flow meter 200 device, which can not only effectively distribute the flow velocity, but also effectively eliminate vortices and achieve effective rectification of the flow field, thereby making the flow field entering the metering section stable and uniform, so as to improve the metering accuracy.

[0043] Figure 1 This is a three-dimensional structural schematic diagram of a flow meter device provided in an embodiment of this application. (Refer to...) Figure 1 As shown, the flow meter device provided in this embodiment includes a flow meter 200 and a rectifier 100. The inlet of the flow meter 200 is connected to the outlet of the rectifier 100. The rectifier 100 effectively rectifies the fluid flow field entering the flow meter 200, thereby improving the stability and uniformity of the flow field entering the flow range.

[0044] In this embodiment, the ultrasonic flow meter 200 is used as an example for explanation. Additionally, in this embodiment, the gas is used as an example for explanation; therefore, the fluid flow field can also be referred to as the gas flow field.

[0045] In this embodiment of the application, the rectifier 100 includes a rectifier housing 110 and a rectifier assembly 120. The rectifier housing 110 is connected to the outer casing of the flow meter 200, and the inner wall of the rectifier housing 110 defines a fluid flow channel 113 for accommodating the rectifier assembly 120. The outlet of the fluid flow channel 113 is connected to the inlet of the flow meter 200.

[0046] In this embodiment, the rectifier assembly 120 and the rectifier housing 110 constitute the rectifier device 100, making the rectifier device 100 independent of the flow meter 200. This avoids affecting the structural design of the flow meter 200, effectively improves the versatility of the product, facilitates the maintenance and upgrading of old products, and reduces product maintenance costs.

[0047] However, the rectifier assembly 120 can also be disposed inside the flow meter 200, that is, the rectifier assembly 120 is integrated into the flow meter 200. In one possible implementation, this application embodiment provides a flow meter 200, which includes a flow meter body and a rectifier assembly 120. The flow meter body has a fluid channel 113 for gas flow, and the rectifier assembly 120 is disposed inside the fluid channel 113, with the closed end of the guide shroud 10 of the rectifier assembly 120 close to the inlet of the fluid channel 113. This configuration eliminates the installation space required for arranging the rectifier assembly 120, and also reduces the installation space requirement while improving the metering accuracy of the flow meter 200.

[0048] The rectifier assembly 120 and rectifier device 100 provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] Figure 2 This is a three-dimensional structural diagram of a rectifier 100 provided in an embodiment of this application. Figure 3 yes Figure 2 The cross-section of the rectifier 100 shown is shown. Figure 4 yes Figure 2 An exploded view of the rectifier 100 shown. (Combined with...) Figures 2 to 4 As shown, the rectifier 100 provided in this embodiment includes a rectifier housing 110 and a rectifier assembly 120. The inner wall of the rectifier housing 110 defines a hollow fluid channel 113. One opening of the fluid channel 113 serves as an inlet for gas to enter, and the other opening of the fluid channel 113 serves as an outlet for gas to exit and communicates with the inlet of the flow meter 200.

[0050] In this embodiment, the structure of the rectifier housing 110 is not limited. Exemplarily, in conjunction with... Figures 2 to 4As shown, the rectifier housing 110 includes a hollow intermediate portion 111 and two flange portions 112. The two flange portions 112 are respectively fitted onto the outer walls of opposite ends of the intermediate portion 111, and are used to fix the rectifier device 100. One of the flange portions 112 is used to connect to the housing of the flow meter 200. The inner wall of the intermediate portion 111 defines a fluid flow channel 113, thus the rectifier assembly 120 is disposed inside the intermediate portion 111.

[0051] In this embodiment of the application, the axial direction of the rectifier assembly 120 is defined as the first direction (e.g., Figure 3 (X-direction), define the direction perpendicular to the axis of the rectifier assembly 120 as the second direction (e.g., Figure 3 In the Y direction), along the first direction, the rectifier assembly 120 has a first end and a second end, the first end being close to the inlet of the fluid channel 113 and the second end being close to the outlet of the fluid channel 113.

[0052] Combination Figures 2 to 4 As shown, the rectifier assembly 120 provided in this embodiment includes a first rectifier 20 and a flow guide shroud 10. Along a first direction, the closed end of the flow guide shroud 10 is close to the first end, and the opening of the flow guide shroud 10 is close to the second end. One end of the first rectifier 20 is disposed inside the flow guide shroud 10. Along a second direction, a first gap 60 is formed between the flow guide shroud 10 and the inner wall of the fluid flow channel 113, and a second gap 70 is formed between the flow guide shroud 10 and the first rectifier 20. The interior of the flow guide shroud 10 has a first cavity, which at least includes the area where the second gap 70 is located. The first cavity and the area where the first gap 60 is located are connected through the opening of the flow guide shroud 10. The first rectifier 20 includes a plurality of first rectifier holes 21, which are disposed inside the flow guide shroud 10 and are used to guide gas inside the flow guide shroud 10 to the outlet of the fluid flow channel 113.

[0053] See Figure 3 As shown by the dashed arrow, the gas flow path inside the rectifier assembly 120 is as follows: the gas at the first end first enters the first gap 60 and moves from the first end toward the second end along the first direction until it enters the second gap 70 through the opening of the guide shroud 10 and moves from the second end toward the first end along the first direction, finally exiting through the first rectifier hole 21 located inside the guide shroud 10. Therefore, the gas flow path inside the rectifier assembly 120 is similar to an "S" shape (e.g., ...). Figure 3 The direction of the dashed arrow in the middle can not only reduce the length of the rectifier assembly 120 in the first direction, thus helping to miniaturize the rectifier device 100, but also extend the gas flow path so that the gas shape can be fully rectified, and can also reduce the impact of external pressure fluctuations on the fluid.

[0054] In this embodiment of the application, the fact that the area where the first cavity and the first gap 60 are located are connected through the opening of the guide shroud 10 means that the gas leaving the first gap 60 will enter the second gap 70 through the opening of the guide shroud 10, so that the first rectifier hole 21 rectifies the gas in the first gap 60.

[0055] See also Figure 3 As shown, the other end of the first rectifier 20 is located outside the flow guide shroud 10 and contacts the inner wall of the fluid flow channel 113, ensuring that gas leaving the area where the first gap 60 is located can enter the second gap 70 through the opening of the flow guide shroud 10. Of course, in some embodiments, an additional guide member sleeved on the other end of the first rectifier 20 can also be provided, so that gas leaving the first area can enter the second gap 70 through the opening of the flow guide shroud 10.

[0056] See also Figure 3 As shown, the interior of the flow guide 10 has a second cavity 80. The second cavity 80 includes at least the area between the closed end of the flow guide 10 and the first rectifier 20. The first cavity and the second cavity 80 are connected. Along the direction from the first end to the second end, the cross-sectional area of ​​the second cavity 80 gradually increases, and the cross-sectional area of ​​the second cavity 80 is perpendicular to the first direction. This configuration allows the structure of the flow guide 10 to match the structure of the fluid channel 113, making the first gap 60 a uniform, narrow annular channel. This allows for sufficient compression of the fluid between the flow guide 10 and the fluid channel 113, resulting in a well-organized airflow pattern and reducing the impact of external pressure fluctuations on the airflow.

[0057] like Figure 3 As shown, the cross-sectional area of ​​the second cavity 80 gradually increases along the direction from the first end to the second end. Of course, in some embodiments, the cross-sectional area of ​​the second cavity 80 may also gradually increase partially along the direction from the first end to the second end.

[0058] like Figure 3 As shown, in the embodiment of the application, the first cavity includes the region where the second gap 70 is located, and along the first direction, the second cavity 80 includes the region between the closed end of the flow guide 10 and the first rectifier 20. Of course, in some embodiments, the first cavity includes the second gap 70, and the second cavity 80 includes the region between the closed end of the flow guide 10 and the first rectifier 20, as well as the interior of the cylindrical portion 22 of the first rectifier 20. Alternatively, in one embodiment, the first cavity includes the region where the second gap 70 is located and the interior of the cylindrical portion 22 of the first rectifier 20, and the second cavity 80 includes the region between the flow guide 10 and the first rectifier 20.

[0059] Figure 5 yes Figure 2 A three-dimensional structural diagram of the first rectifier 20 in the process. Combined with the above... Figure 2 and Figure 3 As shown, and see Figure 5 As shown, the first rectifier 20 includes a cylindrical portion 22. The closed end of the cylindrical portion 22 is disposed inside the flow guide shroud 10. Along the first direction, the second cavity 80 is located between the closed end of the flow guide shroud 10 and the closed end of the cylindrical portion 22. The closed end of the cylindrical portion 22 and its sidewall have first rectifier holes 21. This arrangement not only increases the speed at which the fluid leaves the rectifier channel but also makes the flow velocity distribution more uniform.

[0060] The cylindrical part 22 has a cylindrical shape.

[0061] The closed end of the cylindrical portion 22 and the first rectifier hole 21 on the side wall can have the same or different shapes, for example... Figure 2 As shown, both the closed end of the cylindrical portion 22 and the first rectifier hole 21 on the side wall are circular holes. In addition, the inner diameters of the side wall and the first rectifier hole 21 on the closed end of the cylindrical portion 22 are the same, which can ensure uniform flow velocity distribution.

[0062] Figure 6 yes Figure 2 A cross-sectional view of the first rectifier 20 in the middle. Combined with the above... Figure 5 , and see Figure 6 As shown, the first rectifier 20 also includes an annular portion 23. The annular portion 23 is disposed outside the flow guide shroud 10 and connected to the open end of the cylindrical portion 22. The inner hole 24 of the annular portion 23 is used to discharge fluid from inside the cylindrical portion 22. The diameter of the inner hole 24 gradually increases along the direction from the first end to the second end, and the diameter of the smaller end of the inner hole 24 is the same as the inner diameter of the open end of the cylindrical portion 22. This arrangement allows the fluid to diffuse uniformly into the flow meter 200.

[0063] The cylindrical part 22 and the annular part 23 can be an integral structure or a separate structure, for example, connected by a threaded connection.

[0064] The outer wall of the annular portion 23 contacts the inner wall of the fluid flow channel 113 to ensure that the gas flowing out from the first gap 60 enters the first cavity through the opening of the guide shroud 10.

[0065] Figure 7 This is a three-dimensional structural diagram of the fairing 10 and the third rectifier 40 in section 2. Figure 8 This is a front view of the fairing 10 and the third rectifier 40 in section 2. Figure 9 yes Figure 2 A cross-sectional view showing the engagement of the fairing 10 and the third rectifier 40. (Combined with the above...) Figure 2 and Figure 3 As shown, and see Figures 7 to 9As shown, the flow deflector 10 includes an arc-shaped head 12 and a tubular portion 11. The arc-shaped head 12 includes a hemispherical segment 121 and a conical segment 122. The hemispherical segment 121 is connected to the smaller end of the conical segment 122 and is close to the first end. The larger end of the conical segment 122 is connected to one end of the tubular portion 11, and the other end of the tubular portion 11 is close to the second end. This arrangement allows the first gap 60 between the flow deflector 10 and the fluid flow channel 113 to form a uniform annular channel, enabling sufficient compression of the fluid, thus fully regulating the airflow pattern and reducing the influence of external pressure on the airflow.

[0066] The longitudinal section of the tubular portion 11 is annular, which makes the distance between the outer wall of the tubular portion 11 and the inner wall of the rectifier housing 110 the same along the first direction, ensuring that the gap between the outer wall of the tubular portion 11 and the inner wall of the rectifier housing 110 is a uniform annular channel.

[0067] See also Figure 3 As shown, the cross-sectional area of ​​the second cavity 80 gradually increases along the direction from the first end to the second end. Therefore, the second cavity 80 may include the internal space of the arc-shaped head 12.

[0068] See also Figure 3 As shown, the fluid channel 113 includes a first channel section 1131, a second channel section 1132, and a third channel section 1133 connected sequentially along a first direction. Along the direction from the first end to the second end, the inner diameter of the second channel section 1132 gradually increases, while the inner diameter of the first channel section 1131 is smaller than the inner diameter of the third channel section 1133. The arc-shaped head 12 of the flow guide shroud 10 is disposed inside the second channel section 1132, and the tubular portion 11 is disposed inside the third channel section 1133. This arrangement allows the first gap 60 between the flow guide shroud 10 and the inner wall of the fluid channel 113 to form a uniform annular channel, thereby fully compressing the fluid.

[0069] The arc-shaped head 12 can match the second flow channel section 1132 of the fluid flow channel 113, so that the gap between the arc-shaped head 12 and the second flow channel section 1132 is a uniform annular channel.

[0070] See also Figure 3 As shown, the rectifying assembly 120 also includes a third rectifying element 40. The third rectifying element 40 is disposed outside the flow guide shroud 10 and connected to the closed end of the flow guide shroud 10. The third rectifying element 40 is located near the first end and inside the first flow channel section 1131. The third rectifying element 40 includes multiple third rectifying holes 41, which are used to allow fluid to enter the area where the first gap 60 is located. Accordingly, by providing a third rectifying element 40 with third rectifying holes 41, the problem of high flow velocity at the center and slow flow velocity at the edges can be improved, resulting in a more uniform flow field and effectively eliminating vortices.

[0071] The structure of the third rectifier 40 is not limited here. For example, the third rectifier 40 can be a circular plate structure, and multiple third rectifier holes 41 are evenly arranged on the third rectifier 40. This arrangement can not only eliminate vortices, but also make the flow velocity more evenly distributed.

[0072] The first end of the third rectifier 40 is fixedly connected to the closed end of the fairing 10, and the second end of the third rectifier 40 is connected to the rectifier housing 110. This not only reduces the difficulty of fixing the fairing 10, but also improves the assembly efficiency of the rectifier device 100. Of course, in addition to being fixedly connected to the fairing 10, the third rectifier 40 can also contact the closed end of the fairing 10 or be spaced apart from the closed end of the fairing 10 along the first direction.

[0073] In this embodiment, the third rectifier 40 includes multiple rectifier groups, each rectifier group including multiple third rectifier holes 41 surrounding the axis of the shroud 10. The inner diameter and center distance of the third rectifier holes 41 in adjacent groups are different. The center distance refers to the distance between the centers of two adjacent third rectifier holes 41 along the first direction in the same rectifier group.

[0074] In this embodiment of the application, along the second direction from the inside to the outside, the inner diameter of the third rectifier hole 41 of the multiple rectifier groups gradually decreases, the number gradually increases, and the center distance gradually increases.

[0075] See also Figure 3 As shown, the rectifier assembly 120 also includes a muffler 50. The muffler 50 is fitted onto the outer wall of the flow guide shroud 10 and contacts both the outer wall of the flow guide shroud 10 and the inner wall of the fluid flow channel 113. The outer diameter of the muffler 50 is larger than the outer diameter of the third rectifier 40 and is located inside the third flow channel section 1133. The muffler 50 includes a silencing channel 51, and the area where the first gap 60 is located is connected to the first cavity through the silencing channel 51. This configuration further eliminates the impact of pressure fluctuations at the front end of the muffler 50, thereby further reducing existing noise.

[0076] The silencing channel 51 has a wavy cross-section, and its cross-section is parallel to the first direction. Furthermore, the extension direction of the silencing channel 51 is parallel to the first direction.

[0077] Since the flow deflector 10 is composed of an arc-shaped head 12 and a tubular portion 11, the muffler 50 is fitted onto the outer wall of the tubular portion 11 and contacts both the outer wall of the tubular portion 11 and the inner wall of the flow-rectifying housing 110. Furthermore, the length of the muffler 50 is equal to the length of the tubular portion 11 along the first direction, which improves the noise reduction effect. Of course, the length of the muffler 50 can also be less than or greater than the length of the tubular portion 11.

[0078] In this embodiment, the specific structure of the muffler 50 is not limited.

[0079] Figure 10 yes Figure 2 A partial three-dimensional structural schematic diagram of the muffler 50. See, for example, [reference needed]. Figure 10 As shown, the muffler 50 may include an inner tube 52, an outer tube 53, a plurality of first annular rectifier vanes 54, and a plurality of second annular rectifier vanes 55. Along a second direction, the outer tube 53 and the inner tube 52 are spaced apart and surround the flow guide 10, with the flow guide 10 in contact with the inner tube 52. The plurality of first annular rectifier vanes 54 and the plurality of second annular rectifier vanes 55 are disposed between the inner tube 52 and the outer tube 53. The plurality of first annular rectifier vanes 54 are connected to the inner tube 52, and the plurality of second annular rectifier vanes 55 are connected to the outer tube 53. Both the first annular rectifier vanes 54 and the second annular rectifier vanes 55 surround the flow guide 10. Along a first direction, the plurality of first annular rectifier vanes 54 and the plurality of second annular rectifier vanes 55 are arranged alternately, with gaps between adjacent first annular rectifier vanes 54 and second annular rectifier vanes 55. The inner pipe 52, the outer pipe 53, the first annular rectifier 54, and the second annular rectifier 55 together define the aforementioned noise reduction channel 51.

[0080] Figure 11 This is a cross-sectional view of another rectifier device 100 provided in the embodiments of this application. Figure 10 and Figure 3 The difference lies in that the rectifier assembly 120 may further include a second rectifier 30. Specifically, the rectifier assembly 120 includes a second rectifier 30, which is fitted onto the outer wall of the first rectifier 20 and contacts the flow guide shroud 10. The second rectifier 30 includes multiple second rectifier holes 31, and the area where the first gap 60 is located communicates with the first cavity through these holes. This configuration further improves the rectification effect.

[0081] The second rectifier 30 is disposed outside the flow guide 10 and contacts the end face of the flow guide 10. Along the second direction, the projection of the flow guide 10 covers the projection of all the second rectifier holes 31. Of course, the second rectifier 30 can also be disposed inside the flow guide 10 and contact the inner wall of the flow guide 10.

[0082] The structure of the second rectifier 30 is not limited here. For example, as shown... Figure 11 As shown, the second rectifier has a ring-shaped plate structure.

[0083] The second rectifier orifice 31 is axially parallel to the first direction, ensuring that the fluid flows along the direction of the rectifier channel. Multiple second rectifier orifices 31 are evenly arranged on the second rectifier 30 to ensure the stability of the flow field.

[0084] In the first direction, the projection of the flow guide 10 covers the projection of the second rectifier 30, which can prevent the second rectifier 30 from affecting the fluid leaving between the flow guide 10 and the fluid flow channel 113.

[0085] like Figure 11 As shown, the muffler 50 and the second rectifier 30 coexist. However, in some embodiments, the muffler 50 can be removed, that is, only the second rectifier 30 is provided.

[0086] The parallelism, perpendicularity, numerical values, and numerical ranges involved in the embodiments of this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0087] In the description of the embodiments of this application, it should be understood that the terms (if present) such as "top", "bottom", "upper", "lower", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0088] In the description of the embodiments of this application, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0089] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rectifier assembly, characterized in that, The rectifier assembly is disposed inside the fluid flow channel, and the rectifier assembly includes a first rectifier and a flow guide shroud; The axial direction of the rectifier assembly is defined as a first direction. Along the first direction, the rectifier assembly has a first end and a second end. The closed end of the flow guide is close to the first end, and the opening of the flow guide is close to the second end. One end of the first rectifier is disposed inside the flow guide. A second direction is defined as the direction perpendicular to the axis of the rectifier assembly. Along the second direction, there is a first gap between the flow guide and the inner wall of the fluid flow channel, and a second gap between the flow guide and the first rectifier. The interior of the flow guide has a first cavity, which includes at least the area where the second gap is located. The first cavity and the area where the first gap is located are connected through the opening of the flow guide. The first rectifier includes a plurality of first rectifier holes, which are disposed inside the flow guide cover; The interior of the flow guide has a second cavity, which includes at least the area between the closed end of the flow guide and the first rectifier. The first cavity and the second cavity are in communication. Along the direction from the first end to the second end, at least a portion of the cross-sectional area of ​​the second cavity gradually increases. The first rectifier includes a cylindrical portion, the closed end of which is disposed inside the flow guide shroud. Along the first direction, the second cavity is located between the closed end of the flow guide shroud and the closed end of the cylindrical portion. The closed end of the cylindrical portion and the side wall of the cylindrical portion have the first rectifier hole.

2. The rectifier assembly according to claim 1, characterized in that, The first rectifier further includes an annular portion, which is disposed outside the flow guide and connected to the open end of the cylindrical portion. The inner hole of the annular portion is used to discharge fluid from the interior of the cylindrical portion, wherein: Along the direction from the first end toward the second end, the diameter of the inner hole gradually increases, and the diameter of the small end of the inner hole is the same as the inner diameter of the opening end of the cylindrical part.

3. The rectifier assembly according to any one of claims 1-2, characterized in that, The air deflector includes an arc-shaped head and a tubular part. The arc-shaped head includes a hemispherical segment and a conical tube segment. The hemispherical segment is connected to the small end of the conical tube segment and is close to the first end. The large end of the conical tube segment is connected to one end of the tubular part. The other end of the tubular part is close to the second end.

4. The rectifier assembly according to any one of claims 1-2, characterized in that, The rectifier assembly further includes a second rectifier, which is sleeved on the outer wall of the first rectifier and in contact with the flow guide shroud; The second rectifier includes a plurality of second rectifier holes, and the area where the first gap is located is connected to the first cavity through the plurality of second rectifier holes.

5. The rectifier assembly according to any one of claims 1-2, characterized in that, The rectifier assembly further includes at least one of a third rectifier and a muffler, wherein: The third rectifier is disposed outside the flow guide and near the closed end of the flow guide. The third rectifier is close to the first end and includes a plurality of third rectifier holes for allowing fluid to enter the area where the first gap is located. The silencer is sleeved on the outer wall of the flow guide and contacts the outer wall of the flow guide and the inner wall of the fluid flow channel respectively. The silencer includes a silencing channel, and the area where the first gap is located is connected to the first cavity through the silencing channel.

6. The rectifier assembly according to claim 5, characterized in that, The fluid flow channel includes a first flow channel segment, a second flow channel segment, and a third flow channel segment connected sequentially along the first direction. Along the direction from the first end to the second end, the inner diameter of the second flow channel segment gradually increases, and the inner diameter of the first flow channel segment is smaller than the inner diameter of the third flow channel segment. The rectifier assembly includes the third rectifier and the muffler. The third rectifier is fixedly connected to the closed end of the flow guide and disposed inside the first flow channel section. The outer diameter of the third rectifier is smaller than the outer diameter of the muffler. The muffler is disposed inside the third flow channel section.

7. A flow meter, characterized in that, Includes the flow meter body and the rectifier assembly as described in any one of claims 1-6; The flow meter body has a fluid channel for supplying fluid flow, and the rectifier assembly is disposed inside the fluid channel, with the first end of the rectifier assembly close to the inlet of the fluid channel.

8. A rectifier, characterized in that, Includes a rectifier housing and a rectifier assembly as described in any one of claims 1-6; The inner wall of the rectifier housing defines a fluid flow path for accommodating the rectifier assembly.

9. A flow meter device, characterized in that, Includes a flow meter and a rectifier as described in claim 8; The inlet of the flow meter is connected to the outlet of the rectifier.

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