Rectifier components and gas flow metering devices

Abstract

This application provides a rectifier assembly and a gas flow metering device, relating to the field of metering device technology. The rectifier assembly is installed within the housing of the gas flow metering device. The housing has an air inlet, and the rectifier assembly includes a blocking member. The blocking member includes a flow passage and a flow port, the flow passage being connected to both the air inlet and the flow port. Along a first direction, the inner diameter of the flow passage decreases. The first direction is the flow direction of the fluid in the flow passage. This application can improve the uniformity of the gas flow velocity in the flow passage, thereby improving the metering accuracy of the gas flow metering device.

Description

Technical Field

[0001] This application relates to the field of metering device technology, and in particular to a rectifier assembly and a gas flow metering device. Background Technology

[0002] A gas flow metering device is an instrument used to measure the flow rate of gas by detecting the gas velocity in a metering pipeline. In related technologies, a baffle is usually installed inside the housing of the gas flow metering device. The baffle is usually located below the air inlet of the housing and forms a flow channel with the housing. The baffle is used to block the gas entering the housing, so as to intercept impurities carried in the gas and improve the purity of the gas.

[0003] However, the flow field uniformity of the gas flowing through the flow channel into the metering pipe is poor, which reduces the metering accuracy of the ultrasonic metering device. Summary of the Invention

[0004] In view of the above problems, this application provides a rectifier component and a gas flow metering device, which can improve the uniformity of gas flow velocity in the flow channel, thereby improving the metering accuracy of the gas flow metering device.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] A first aspect of this application provides a rectifier assembly for installation within the housing of a gas flow metering device, the housing having an air inlet, and the rectifier assembly including a blocking element.

[0007] The blocking component includes a flow channel and a flow port, the flow channel being connected to the air inlet and the flow port respectively; the inner diameter of the flow channel decreases along a first direction; wherein, the first direction is the flow direction of the fluid in the flow channel.

[0008] In one possible implementation, the flow passage includes a first flow passage and a second flow passage that are interconnected, wherein the first flow passage is close to and connected to the air inlet; and the second flow passage is close to and connected to the flow outlet.

[0009] The inner diameter of the second flow channel is smaller than the inner diameter of the first flow channel.

[0010] In one possible implementation, the current-carrying channel further includes a third current-carrying channel, which connects the first current-carrying channel and the second current-carrying channel;

[0011] The inner diameter of the third flow channel gradually decreases from the direction of the first flow channel to the second flow channel.

[0012] In one possible implementation, the blocking member includes a blocking base plate and a blocking side plate connected to the blocking base plate, wherein the end of the blocking side plate facing away from the blocking base plate can abut against the housing.

[0013] In one possible implementation, the blocking base plate includes a first blocking base plate, a second blocking base plate, and a third blocking base plate; the first blocking base plate and the second blocking base plate are offset along a second direction and connected by the third blocking base plate;

[0014] The second blocking base plate is located on the side of the first blocking base plate facing the air inlet; the second direction intersects with the first direction;

[0015] The third blocking base plate is inclined relative to the first blocking base plate, and the end of the third blocking base plate that connects to the second blocking base plate is higher than the end of the third blocking base plate that connects to the first blocking base plate.

[0016] In one possible implementation, the flow port is disposed on the second blocking base plate and extends through the second blocking base plate along its thickness direction.

[0017] In one possible implementation, the second blocking base plate further includes a first part, a second part, and a third part; the first part and the third part are offset along the second direction, and the second part connects the first part and the third part, such that the second part constitutes a guide portion;

[0018] The third part is located on the side of the first part away from the air inlet; and the flow outlet is disposed on the third part and penetrates the third part along the thickness direction of the third part.

[0019] In one possible implementation, in the first direction, the end of the blocking base plate facing away from the first blocking base plate and the end of the blocking side plate facing away from the air inlet form the flow port; the rectifier assembly further includes a rectifier, which is disposed on the second blocking base plate;

[0020] The rectifier includes multiple rectifier channels, each of which is connected to the flow port.

[0021] In one possible implementation, the rectifier includes a plurality of first rectifier plates, which are spaced apart along a third direction, and each first rectifier plate extends along a first direction that intersects with the third direction.

[0022] A rectification channel is formed between any two adjacent first rectifier boards; each rectification channel is connected to the flow port.

[0023] In one possible implementation, the rectifier assembly further includes a second rectifier plate having a plurality of rectifier holes;

[0024] All of the aforementioned rectifier holes constitute the flow port.

[0025] In one possible implementation, the blocking member includes a blocking base plate and a blocking side plate connected to the blocking base plate;

[0026] The top of the second rectifier plate protrudes from the blocking side plate and can abut against the top wall of the housing; the blocking side plate can abut against the side wall of the housing.

[0027] A second aspect of this application provides a housing, a metering component, and the rectifier component described in the first aspect; the housing has an air inlet.

[0028] The rectifier assembly is disposed inside the housing, and the flow passage of the rectifier assembly is connected to the air inlet.

[0029] The metering component is disposed within the housing and includes an air inlet port. In a first direction and a second direction, the air inlet port is offset from the flow outlet, and the air inlet port communicates with the flow outlet through the inner cavity of the housing. In one possible implementation, the metering component includes a metering pipe; the gas flow metering device further includes a valve frame and a connector; one end of the connector is connected to the valve frame, and the other end of the connector is connected to the metering pipe, so that the inner cavity of the valve frame can communicate with the metering pipe.

[0030] The valve frame includes an arc-shaped guide surface, which is offset from the connection between the connector and the metering pipeline in the second direction.

[0031] In one possible implementation, the valve holder further includes a first valve holder, the first valve holder including a first sidewall opposite to the connector; the first sidewall includes an arcuate surface;

[0032] The arc surface includes a first end point, a first end line, and a second end line. The first end line is the connection point between the connector and the first valve frame, and the second end line is located on the first side wall.

[0033] In one possible implementation, the first valve holder further includes a second sidewall and a top wall, the second sidewall being connected to the top wall via the arcuate guide surface;

[0034] The second sidewall is connected to the connector.

[0035] In one possible implementation, the arcuate guide surface includes a first tangent line that is tangent to the top wall;

[0036] The first tangent is aligned with the lower surface of the second blocking base plate of the rectifier assembly, or is located below the lower surface of the second blocking base plate of the rectifier assembly.

[0037] In one possible implementation, in a vertical cross-section, the arcuate guide surface includes a central axis, the distance between the central axis and the end of the second blocking base plate facing the first valve frame being greater than or equal to twice the radius of the arcuate guide surface.

[0038] In the rectifier assembly and gas flow metering device provided in this application embodiment, the inner diameter of the flow channel decreases along the first direction; that is, the flow channel with a larger inner diameter is closer to the air inlet, and the flow channel with a smaller inner diameter is closer to the outlet. In this way, the larger flow channel acts as a buffer, initially slowing down and stabilizing the gas entering the flow channel at high speed, thereby reducing the generation of eddies and turbulence. As the gas continues to flow towards the flow channel with a gradually decreasing inner diameter, the gas velocity gradually increases, but the flow direction becomes more consistent, thereby improving the uniformity of the flow field of the gas flowing into the metering pipe, further enhancing the uniformity of the flow field of the gas entering the metering pipe through the outlet, and thus improving the metering accuracy of the gas flow metering device.

[0039] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the rectifier components and gas flow metering devices provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0040] 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.

[0041] Figure 1 A partial schematic diagram of the internal structure of the gas flow metering device provided in the embodiments of this application. Figure 1 ;

[0042] Figure 2Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 1 ;

[0043] Figure 3 Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 2 ;

[0044] Figure 4 A partial schematic diagram of the internal structure of the gas flow metering device provided in the embodiments of this application. Figure 2 ;

[0045] Figure 5 Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 3 ;

[0046] Figure 6 Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 4 ;

[0047] Figure 7 A partial schematic diagram of the internal structure of the gas flow metering device provided in the embodiments of this application. Figure 3 ;

[0048] Figure 8 Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 5 ;

[0049] Figure 9 Three-dimensional representation of the rectifier assembly provided in the embodiments of this application Figure 6 ;

[0050] Figure 10 A schematic diagram of the internal structure of the gas flow metering device provided in the embodiments of this application. Figure 1 .

[0051] Explanation of reference numerals in the attached figures:

[0052] 1000: Gas flow metering device;

[0053] 100: Rectifier component;

[0054] 110: Blocking component; 111: Blocking base plate; 1111: First blocking base plate; 1112: Second blocking base plate; 11121: First part; 11122: Second part; 11123: Third part; 1113: Third blocking base plate; 112: Blocking side plate;

[0055] 120: Current flow channel; 121: First current flow channel; 122: Second current flow channel; 123: Third current flow channel;

[0056] 130: Outlet;

[0057] 140: Rectifier component; 141: First rectifier plate; 142: Second rectifier plate; 143: Rectifier channel; 144: Rectifier aperture;

[0058] 200: Housing; 210: Air inlet; 220: Bottom shell; 230: Top cover; 240: Support column;

[0059] 300: Metering assembly; 310: Metering pipeline; 320: Metering element;

[0060] 400: Valve frame; 410: Connector; 420: Arc surface; 421: First end line; 422: Second end line; 430: First valve frame; 431: First side wall; 432: Second side wall; 433: Top wall; 434: Arc-shaped guide surface; 440: Second valve frame. Detailed Implementation

[0061] As described in the background art, the flow field uniformity of gas flowing from the flow channel to the metering pipe in the related art is poor. The inventors have found that the reason for this problem is that the inner diameter of the flow channel is uniform and relatively large. When the gas enters the flow channel through the inlet, the flow velocity is relatively high, which will form eddies or turbulence in the flow channel, resulting in poor flow field uniformity of the gas. Consequently, the flow field uniformity of the gas flowing from the flow channel to the metering pipe is also poor.

[0062] To address the aforementioned technical problems, this application provides a rectifying component and a gas flow metering device in which the inner diameter of the flow channel decreases along a first direction; that is, the flow channel with a larger inner diameter is closer to the air inlet, and the flow channel with a smaller inner diameter is closer to the outlet. In this way, the larger flow channel acts as a buffer, initially slowing down and stabilizing the gas entering the flow channel at high speed, thereby reducing the generation of eddies and turbulence. As the gas continues to flow towards the gradually decreasing inner diameter flow channel, the gas velocity gradually increases, but the flow direction becomes more consistent, thereby improving the uniformity of the flow field of the gas flowing into the metering pipe, further enhancing the uniformity of the flow field of the gas entering the metering pipe through the outlet, and thus improving the metering accuracy of the gas flow metering device.

[0063] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely one embodiment of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0064] Please refer to the attached document. Figure 1 To be continued Figure 9 This application provides a rectifier assembly 100 for installation within the housing 200 of a gas flow metering device 1000, wherein the housing 200 has an air inlet 210. It should be understood that the rectifier assembly 100 can be directly connected to the inner wall of the housing 200 or indirectly connected; this embodiment does not impose specific limitations on this.

[0065] The rectifier assembly 100 includes a blocking element 110, which is disposed within the housing 200 and located directly below the air inlet 210. This effectively blocks and filters impurities, such as dust and particulate matter, from entering the housing 200 via the air inlet 210, preventing these impurities from directly entering the metering pipeline. This significantly reduces interference from impurities in the metering process, thereby improving the accuracy of the entire metering system.

[0066] The blocking element 110 includes a flow channel 120 and a flow port 130. The flow channel 120 is connected to both the flow port 130 and the air inlet 210. Alternatively, the flow port 130 is connected to the air inlet 210 via the flow channel 120. It should be noted that the flow channel 120 can be defined by the blocking element 110 itself, or it can be formed by the blocking element 110 and the housing 200. For example, the housing 200 may include a bottom shell 220 and a top cover 230. The top cover 230 is detachably connected to the bottom shell 220. In this case, the air inlet 210 can be located on the top cover 230, and the blocking element 110 and the top cover 230 together form the flow channel 120.

[0067] Along the direction from the air inlet 210 to the outlet 130, or in other words, along the first direction, the inner diameter of the flow channel 120 decreases. Here, the first direction is the flow direction of the fluid in the flow channel 120, which can be an auxiliary direction. Figure 1 In the X direction.

[0068] In other words, the larger inner diameter flow channel 120 is closer to the air inlet 210, and the smaller inner diameter flow channel 120 is closer to the outlet 130. In this way, the larger flow channel 120 acts as a buffer, initially slowing and stabilizing the gas entering at high speed, thus reducing the generation of eddies and turbulence. As the gas continues to flow towards the gradually decreasing inner diameter flow channel 120, the gas velocity gradually increases, but the flow direction becomes more consistent, thereby improving the uniformity of the flow field of the gas flowing into the metering pipe. This further enhances the uniformity of the flow field of the gas entering the metering pipe through the outlet 130, thereby improving the metering accuracy of the gas flow metering device.

[0069] In one possible implementation of the flow passage 120, the flow passage 120 includes a first flow passage 121 and a second flow passage 122 that are interconnected. The first flow passage 121 is close to and connected to the air inlet 210; or, the first flow passage 121 is located directly below the air inlet 210. The second flow passage 122 is close to and connected to the flow outlet 130.

[0070] The inner diameter of the second flow channel 122 is smaller than that of the first flow channel 121. The larger inner diameter of the first flow channel 121 functions similarly to a buffer chamber. When gas enters the first flow channel 121 through the inlet 210, the gas is pre-mixed in the first flow channel 121, resulting in a relatively uniform gas flow field. Then, when it enters the smaller inner diameter of the second flow channel 122, due to the reduction in the channel cross-sectional area, the gas velocity will increase accordingly according to the principles of fluid mechanics, thus forming a natural acceleration effect. This acceleration not only helps to further refine the mixing between gas molecules, but also ensures that the gas reaches a more uniform and stable flow field state before flowing out.

[0071] It should be noted that the first flow channel 121 and the second flow channel 122 can be directly connected, thus forming a vertical step surface between the first flow channel 121 and the second flow channel 122.

[0072] The first flow channel 121 and the second flow channel 122 can also be connected through other connecting channels. For example, the flow channel 120 also includes a third flow channel 123, which connects the first flow channel 121 and the second flow channel 122.

[0073] The inner diameter of the third flow channel 123 gradually decreases from the direction of the first flow channel 121 to the second flow channel 122.

[0074] In this embodiment, the gradual reduction of the inner diameter of the third flow channel 123 provides a smooth transition region for the gas, allowing the gas to gradually accelerate and adjust its flow state before entering the second flow channel 122 from the first flow channel 121. This gradual flow rate regulation helps to reduce sudden changes in gas flow, reduce the formation of turbulence and eddies, thereby maintaining the stability and uniformity of the gas flow field.

[0075] In one possible implementation, the blocking member 110 includes a blocking base plate 111 and a blocking side plate 112, one end of the blocking side plate 112 being connected to the blocking base plate 111 and the other end of the blocking side plate 112 being connected to the housing 200.

[0076] The blocking base plate 111 and the blocking side plate 112 can be either separate or integral structures. For example, the blocking member 110 can be formed by stamping the substrate using a stamping process. This can improve the structural strength of the blocking member 110.

[0077] When the blocking member 110 includes a blocking base plate 111, the shape of the blocking base plate 111 can be modified to form flow channels 120 of different sizes.

[0078] Exemplarily, the blocking base plate 111 includes a first blocking base plate 1111, a second blocking base plate 1112, and a third blocking base plate 1113; the first blocking base plate 1111 and the second blocking base plate 1112 are offset along a second direction and connected by the third blocking base plate 1113; the second blocking base plate 1112 is located on the side of the first blocking base plate 1111 facing the air inlet 210. The first direction intersects the second direction, for example, the first direction and the second direction are perpendicular to each other. It should be noted that, in one example, the plane containing the first direction and the second direction is parallel to the first blocking base plate 1111; for example, the second direction can be the width direction of the first blocking base plate 1111, in which case the second direction is an auxiliary direction. Figure 1 In the Y direction. In another example, the plane containing the first and second directions is perpendicular to the first blocking base plate 1111. For example, the second direction can be the thickness direction of the first blocking base plate 1111, in which case the second direction is the thickness direction of the first blocking base plate 1111. Figure 1 In the Z direction, and with attachment Figure 1 Taking the orientation shown as an example, the second blocking base plate 1112 is located above the first blocking base plate 1111.

[0079] In this way, the inner diameter of the flow channel 120 corresponding to the second blocking base plate 1112 can be reduced in both the thickness direction and / or the width direction, which can accelerate the flow velocity and thus optimize the flow field of the fluid.

[0080] In this configuration, the third blocking base plate 1113 is perpendicular to the first blocking base plate 1111, or the third blocking base plate 1113 is inclined relative to the first blocking base plate 1111. For example, the end of the third blocking base plate 1113 that connects to the second blocking base plate 1112 is higher than the end of the third blocking base plate 1113 that connects to the first blocking base plate 1111. That is, the angle between the third blocking base plate 1113 and the first blocking base plate 1111 is an obtuse angle. It should be noted that, considering the placement direction of the gas meter can be changed arbitrarily, the "higher" angle in this example can be adjusted according to the placement position of the gas meter. For example, as shown in the attached... Figure 1Taking the orientation shown as an example, in the second direction Z, the end where the third blocking base plate 1113 connects to the second blocking base plate 1112 is located above the end where the third blocking base plate 1113 connects to the first blocking base plate 1111. For another example, when the gas meter is arranged horizontally, the end where the third blocking base plate 1113 connects to the second blocking base plate 1112 is located to the right of the end where the third blocking base plate 1113 connects to the first blocking base plate 1111.

[0081] This embodiment, through the staggered arrangement of the first and second blocking base plates 1111 and 1112, and their connection with the third blocking base plate 1113, can create more complex and varied airflow paths, increasing the versatility of the flow channel 120. Furthermore, when the third blocking base plate 1113 is inclined relative to the first blocking base plate 1111, it can also serve a guiding function, increasing the gas flow rate.

[0082] In this embodiment, along the first direction, the size W2 of the second blocking base plate 1112 is 1 / 3 to 2 / 3 of the size W1 of the blocking base plate 111; and / or, the vertical distance H between the first blocking base plate 1111 and the second blocking base plate 1112 is 5.5mm to 6.5mm. For example, the vertical distance H between the first blocking base plate 1111 and the second blocking base plate 1112 is 6mm. The size W2 of the second blocking base plate 1112 is 1 / 2 of the size W1 of the blocking base plate 111.

[0083] By reasonably adjusting the relevant dimensions of the first blocking base plate 1111 and the second blocking base plate 1112, the metering accuracy, stability and reliability of the gas flow metering device can be significantly improved, providing users with a more accurate and reliable metering solution.

[0084] In one possible implementation, the flow port 130 is disposed on the second baffle plate 1112 and extends through the second baffle plate 1112 along its thickness direction. This ensures that the flow port 130 is located within the second flow channel 122 and also increases the distance between the air inlet 210 and the flow port 130, thereby increasing the residence time of the gas in the flow channel 120 and maximizing the uniformity of the gas flow.

[0085] It should be noted that the top surface of the second blocking base plate 1112 may extend entirely along the first direction, or it may be in other ways. For example, the second blocking base plate 1112 may also include a first part 11121, a second part 11122, and a third part 11123.

[0086] The first part 11121 and the third part 11123 are offset in the second direction. The second part 11122 connects the first part 11121 and the third part 11123, so that the second part 11122 constitutes a guide. The third part 11123 is located on the side of the first part 11121 away from the air inlet 210. The flow outlet 130 is provided on the third part 11123 and penetrates the third part 11123 along the thickness direction of the third part 11123.

[0087] Thus, the inner diameter of the second flow channel 122 is not uniform everywhere; the inner diameter of the second flow channel 122 near the flow port 130 is larger. This provides a certain buffering function, reducing the eddies formed by the gas in the second flow channel 122 and ensuring the smooth flow of gas entering the region below the baffle 110 through the flow port 130. Furthermore,

[0088] The second part 11122 is perpendicular to the first part 11121, or it may be inclined relative to the first part 11121. For example, the second part 11122 is inclined relative to the first part 11121 and extends in a direction away from the first part 11121. In this way, the guiding function of the second part 11122 can be utilized.

[0089] It should be noted that the flow port 130 can be directly on the blocking base plate 111, or it can be arranged in other ways. For example, please refer to the attached document. Figure 4 To be continued Figure 9 In the first direction, the end of the second blocking base plate 1112 facing away from the first blocking base plate 1111, together with the end of the blocking side plate 112 facing away from the air inlet 210, forms an outlet 130. The enclosed outlet design can also enhance the overall stability of the structure to a certain extent, help reduce noise and vibration caused by airflow impact, and improve the stability of the rectifier assembly 100.

[0090] Please refer to the attached document. Figure 4 To be continued Figure 9 The rectifier assembly 100 also includes a rectifier 140, which is disposed on the second baffle base plate 1112. For example, the rectifier 140 may be disposed on the side of the flow port 130 facing the air inlet 210, or in other words, there may be a certain distance between the rectifier 140 and the flow port 130. Alternatively, the rectifier 140 may be disposed at the flow port 130, or in other words, the rectifier 140 may be disposed at the end of the baffle member 110.

[0091] The rectifier 140 includes multiple rectifier channels 143, each of which is opposite to the flow port 130. Gas in the flow channel 120 passes through the multiple rectifier channels 143 and is transported to the outside of the flow channel 120. This can rectify the chaotic gas into an orderly airflow, optimize the gas flow field inside the housing 200, and improve the metering stability of the gas flow metering device.

[0092] As one possible implementation of the rectifier 140, the rectifier 140 includes a plurality of first rectifier plates 141, which are spaced apart along a third direction, and each first rectifier plate 141 extends along a first direction, which intersects with the third direction; wherein, the first direction can be an auxiliary direction. Figure 5 In the X direction, the third direction can be attached. Figure 5 In the Y direction. It should be noted that the following embodiments are described using the second direction as the thickness direction and the third direction as the width direction as examples.

[0093] A rectification channel 143 is formed between any two adjacent first rectifier plates 141, and the spacing between adjacent first rectifier plates 141 may be equal or unequal. Preferably, the spacing between adjacent first rectifier plates 141 is equal, which can improve the stability of the gas.

[0094] The number of first rectifier plates 141 can be adjusted according to the pressure loss of the entire instrument. In this example, there are 10 first rectifier plates 141. Along the first direction, the width W3 of the first rectifier plate 141 is 1 / 2 to 1 / 3 of the width W1 of the blocking base plate 111. This size design not only ensures that the first rectifier plate 141 can effectively guide the gas, but also avoids the problems of excessive flow resistance caused by the first rectifier plate 141 being too wide, or poor rectification effect caused by the first rectifier plate 141 being too narrow.

[0095] Each first rectifier plate 141 has at least one guide surface in the direction away from the outlet 130, which can further guide the gas to flow in a specific direction and enhance the rectification effect.

[0096] In one possible implementation, the end of the blocking side plate 112 facing away from the blocking bottom plate 111 is used to abut against the housing 200. This allows the blocking member 110 and the top cover of the housing 200 to enclose and form a flow channel 120. For example, the end of the blocking side plate 112 facing away from the blocking bottom plate 111 is used to abut against the top cover of the housing 200, which helps to optimize the flow state of fluids (such as gas, liquid, etc.) in the channel, reduce turbulence and resistance, and improve the fluid transmission efficiency.

[0097] Please refer to the attached document. Figure 7 To be continued Figure 9As another possible implementation of the rectifier assembly, the rectifier assembly 100 includes a second rectifier plate 142, on which a plurality of rectifier holes 144 are provided; all the rectifier holes 144 constitute a flow port 130.

[0098] Multiple rectifier holes 144 can be arranged in an array on the second rectifier plate 142 to improve the uniformity of the rectification effect of the multiple rectifier holes.

[0099] It should be noted that in this embodiment, the height of the second rectifier plate 142 is greater than or equal to the height of the blocking side plate 112. Exemplarily, the top of the second rectifier plate 142 protrudes beyond the blocking side plate 112 and can abut against the top wall of the housing 200, for example, against the top cover of the housing 200. Simultaneously, the blocking side plate 112 can abut against the side wall of the housing 200. In this way, as much gas as possible can pass through the second rectifier plate 142, thereby improving the rectification effect of the rectifier 140.

[0100] In the first direction, the depth of the rectifier orifice 144 can be adjusted according to the pressure loss of the entire meter. In this example, the preferred depth of the rectifier orifice is 6 mm. In addition, the size and distribution density of the rectifier orifice 144 can be adjusted according to the pressure loss of the entire meter.

[0101] The shape of the rectifier orifice 144 can be selected in various ways. For example, the shape of the rectifier orifice 144 can be circular, elliptical, or polygonal. Preferably, in this example, the shape of the rectifier orifice is polygonal, and the side length of the polygon is 1 mm. The distance between any two adjacent rectifier orifices 144 is 0.73 mm. In this way, multiple rectifier orifices can rectify the chaotic gas into an orderly airflow, which can optimize the flow field of the gas inside the table.

[0102] Please refer to the attached document. Figure 1 Appendix Figure 3 Appendix Figure 5 and attached Figure 10 This application also provides a gas flow metering device 1000 for measuring the flow rate of gas.

[0103] The gas flow metering device 1000 includes a housing 200, which serves as the mounting carrier for the gas flow metering device 1000 and supports its various components.

[0104] The housing 200 includes a bottom shell 220 and a top cover 230, the top cover 230 being detachably connected to the bottom shell 220. The housing 200 has an air inlet 210, which can be located on the top cover 230.

[0105] The gas flow metering device 1000 includes a rectifier assembly 100 as described in any of the above embodiments. The rectifier assembly 100 is disposed within the housing 200, and the flow passage 120 of the rectifier assembly 100 is interconnected with the air inlet 210. It should be noted that the rectifier assembly 100 can be directly connected to the inner wall of the housing 200, or it can have other connection methods. For example, a support column 240 is provided on the bottom wall of the bottom shell 220, and the end of the support column 240 facing away from the bottom wall of the bottom shell 220 is connected to the rectifier assembly 100 to improve the stability of the rectifier assembly 100.

[0106] The gas flow metering device 1000 also includes a metering component 300, which is disposed within the housing 200 and located below the rectifying component 100. The metering component 300 includes an air inlet port, which is offset from the flow outlet in both a first and a second direction, and is interconnected with the flow outlet 130 through the inner cavity of the housing 200. In other words, the air inlet port and the flow outlet 130 are offset not only in the height direction but also in the width direction.

[0107] Thus, the gas to be tested enters the flow channel 120 of the rectifier assembly 100 through the inlet 210, and flows to the metering assembly 300 through the outlet 130 and the inlet port. The metering assembly 300 then measures the flow rate of the gas. In this case, the inlet port and the outlet are offset in both the first and second directions, which increases the distance between them and further improves the uniformity of the gas flow field.

[0108] The metering component 300 includes a metering pipe 310 and a metering element 320. The metering element 320 is installed on and connected to the metering pipe 310. The metering element 320 is used to detect the flow rate of gas flowing through the metering pipe 310. It should be understood that the structure and composition of the metering element 320 are prior art, and will not be described in detail here.

[0109] This embodiment improves the flow field uniformity of gas flowing from the outlet 130 to the metering pipe 310 by modifying the rectifier component 100, thereby improving the metering accuracy of the gas flow metering device.

[0110] In one possible implementation, the gas flow metering device 1000 further includes a valve holder 400 and a connector 410. One end of the connector 410 is connected to the valve holder 400, and the other end is connected to the metering pipe 310, so that the inner cavity of the valve holder 400 can communicate with the metering pipe 310. The valve holder 400 is used to install a motor valve, which controls the opening and closing of the metering pipe 310, thereby controlling the gas flow direction.

[0111] It should be understood that in this embodiment, the inner cavity of the valve holder 400 can communicate with the metering pipeline 310. This can be understood as follows: when the motor valve is located between the connector 410 and the inlet of the inner cavity of the valve holder 400, the communication between the inner cavity of the valve holder 400 and the metering pipeline 310 depends on the control of the motor valve. However, when the motor valve is located on the side away from the connector 410 and the inlet of the inner cavity of the valve holder 400, the inner cavity of the valve holder 400 is directly connected to the metering pipeline 310.

[0112] The valve holder 400 includes an arc-shaped guide surface 434. The connection between the arc-shaped guide surface 434 and the connector 410 and the metering pipe 310 is offset in the second direction. In other words, the arc-shaped guide surface 434 is located above the connection of the metering pipe 310. The arc-shaped guide surface 434 can guide the gas moving through the valve holder 400 in the second direction, thereby more effectively reducing eddies and airflow instability. The arc-shaped guide surface 434 can also guide the fluid exiting the rectifier assembly.

[0113] The valve holder 400 also includes a first valve holder 430, which includes a first sidewall 431 opposite to the connector 410; the first sidewall 431 includes an arc surface 420. When gas enters the valve holder 400 from the connector 410, the arc surface 420 plays an effective buffering role, which can guide the gas to flow more smoothly and reduce the turbulence caused by the sudden change of airflow direction.

[0114] The arc surface 420 includes a first end line 421 and a second end line 422. The first end line 421 is the connection point between the connector 410 and the first valve holder 430, and the second end line 422 is located on the first side wall 431. It should be understood that the arc surface 420 refers to a surface with an arc shape, and the "first end line 421" and "second end line 422" are the lines containing the two boundaries or endpoints of this arc surface.

[0115] In this way, the buffer area of ​​the gas on the arc surface can be maximized, so that when the gas enters the valve frame 400, it has more opportunities and time to be buffered on the arc surface 420, thereby more effectively reducing the instability of eddies and airflow, avoiding disturbance to the gas in the metering pipe 310, and thus improving the metering accuracy of the gas flow metering device.

[0116] In one possible implementation, the first valve holder 430 further includes a second sidewall 432 and a top wall 433, the second sidewall 432 and the top wall 433 being connected by an arcuate guide surface 434; the second sidewall 432 is connected to the connector 410. The arcuate guide surface is analogous to a spherical surface; exemplarily, the arcuate guide surface 434 is a quarter-sphere. The arcuate guide surface 434 can guide the gas moving through the first valve holder 430 towards the top wall 433, thereby more effectively reducing eddies and airflow instability. The arcuate guide surface 434 can also guide the fluid exiting the rectifier assembly.

[0117] In one possible implementation, the arcuate guide surface 434 includes a first tangent line tangent to the top wall 433; the first tangent line is aligned with the lower surface of the second blocking base plate 1112 of the rectifier assembly 100, or is located below the lower surface of the second blocking base plate 1112 of the rectifier assembly 100.

[0118] In the vertical cross-section, the arc-shaped guide surface 434 includes a central axis, and the distance L1 between the central axis and the end of the second blocking base plate 1112 facing the first valve frame 430 is greater than or equal to twice the radius of the arc-shaped guide surface 434.

[0119] Among them, the first tangent is attached. Figure 10 S1 is the middle surface; S2 is the lower surface of the second blocking base plate 1112.

[0120] This ensures a smooth transition of gas as it passes through the area, reducing gas flow resistance and improving the stability of the gas flow.

[0121] It should be noted that the valve holder 400 in this embodiment also includes a second valve holder 440, which is connected to the first valve holder 430 and located on the side of the first valve holder 430 away from the rectifier assembly 100. The second valve holder 440 and the first valve holder 430 are interconnected. It should be understood that the structure of the second valve holder 440 is related technology and will not be described in detail in this embodiment.

[0122] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments. For similar or identical blocking base plates between embodiments, please refer to each other.

[0123] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0124] 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 the blocking base plate or all 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 for installation within the housing of a gas flow metering device, the housing having an air inlet, characterized in that, The rectifier assembly includes a blocking element; The blocking component includes a flow channel and a flow port, the flow channel being connected to the air inlet and the flow port respectively; the inner diameter of the flow channel decreases along a first direction; wherein, the first direction is the flow direction of the fluid in the flow channel.

2. The rectifier assembly according to claim 1, characterized in that, The flow passage includes a first flow passage and a second flow passage that are interconnected. The first flow passage is close to the air inlet and is connected to the air inlet; the second flow passage is close to the flow outlet and is connected to the flow outlet. The inner diameter of the second flow channel is smaller than the inner diameter of the first flow channel.

3. The rectifier assembly according to claim 2, characterized in that, The current-carrying channel further includes a third current-carrying channel, which connects the first current-carrying channel and the second current-carrying channel; The inner diameter of the third flow channel gradually decreases from the direction of the first flow channel to the second flow channel.

4. The rectifier assembly according to any one of claims 1-3, characterized in that, The blocking member includes a blocking base plate and a blocking side plate connected to the blocking base plate, wherein the end of the blocking side plate facing away from the blocking base plate can abut against the housing.

5. The rectifier assembly according to claim 4, characterized in that, The blocking base plate includes a first blocking base plate, a second blocking base plate, and a third blocking base plate; the first blocking base plate and the second blocking base plate are offset along a second direction and connected by the third blocking base plate; The second blocking base plate is located on the side of the first blocking base plate facing the air inlet; The second direction intersects with the first direction; The third blocking base plate is inclined relative to the first blocking base plate, and the end of the third blocking base plate that connects to the second blocking base plate is higher than the end of the third blocking base plate that connects to the first blocking base plate.

6. The rectifier assembly according to claim 5, characterized in that, The flow outlet is disposed on the second blocking base plate and extends through the second blocking base plate along its thickness direction.

7. The rectifier assembly according to claim 6, characterized in that, The second blocking base plate further includes a first part, a second part, and a third part; the first part and the third part are offset along the second direction, and the second part connects the first part and the third part, so that the second part constitutes a guide part; The third part is located on the side of the first part away from the air inlet; Furthermore, the flow port is disposed on the third part and penetrates the third part along the thickness direction of the third part.

8. The rectifier assembly according to claim 5, characterized in that, In the first direction, the end of the second blocking base plate away from the first blocking base plate and the end of the blocking side plate away from the air inlet form the flow port; The rectifier assembly further includes a rectifier element, which is disposed on the second blocking base plate; The rectifier includes multiple rectifier channels, each of which is connected to the flow port.

9. The rectifier assembly according to claim 8, characterized in that, The rectifier includes a plurality of first rectifier plates, which are spaced apart along a third direction, and each first rectifier plate extends along a first direction, which intersects with the third direction. A rectification channel is formed between any two adjacent first rectifier boards.

10. The rectifier assembly according to any one of claims 1-3, characterized in that, The rectifier assembly further includes a second rectifier plate, which has a plurality of rectifier holes; All of the aforementioned rectifier holes constitute the flow port.

11. The rectifier assembly according to claim 10, characterized in that, The blocking component includes a blocking base plate and a blocking side plate connected to the blocking base plate; The top of the second rectifier plate protrudes from the blocking side plate and can abut against the top wall of the housing; the blocking side plate can abut against the side wall of the housing.

12. A gas flow metering device, characterized in that, It includes a housing, a metering component, and a rectifier component as described in any one of claims 1-11; the housing has an air inlet; The rectifier assembly is disposed inside the housing, and the flow passage of the rectifier assembly is connected to the air inlet. The metering component is disposed within the housing, and the metering component includes an air inlet port; in a first direction and a second direction, the air inlet port is offset from the flow outlet, and the air inlet port is interconnected with the flow outlet through the inner cavity of the housing.

13. The gas flow metering device according to claim 12, characterized in that, The metering component includes a metering pipe; the gas flow metering device further includes a valve frame and a connector; one end of the connector is connected to the valve frame, and the other end of the connector is connected to the metering pipe, so that the inner cavity of the valve frame can communicate with the metering pipe; The valve frame includes an arc-shaped guide surface, which is offset from the connection between the connector and the metering pipeline in the second direction.

14. The gas flow metering device according to claim 13, characterized in that, The valve frame further includes a first valve frame, the first valve frame including a first sidewall opposite to the connector; the first sidewall includes an arc surface. The arc surface includes a first end line and a second end line. The first end line is the connection line between the connector and the first valve frame, and the second end line is located on the first side wall.

15. The gas flow metering device according to claim 14, characterized in that, The first valve holder further includes a second sidewall and a top wall, the second sidewall being connected to the top wall via the arc-shaped guide surface; The second sidewall is connected to the connector.

16. The gas flow metering device according to claim 15, characterized in that, The arc-shaped guide surface includes a first tangent line that is tangent to the top wall; The first tangent is aligned with the lower surface of the second blocking base plate of the rectifier assembly, or is located below the lower surface of the second blocking base plate of the rectifier assembly.

17. The gas flow metering device according to claim 16, characterized in that, In a vertical cross-section, the arc-shaped guide surface includes a central axis, and the distance between the central axis and the end of the second blocking base plate facing the first valve frame is greater than or equal to twice the radius of the arc-shaped guide surface.

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