Flowmeter pipeline and ultrasonic flowmeter

Abstract

The utility model provides a flowmeter pipeline and an ultrasonic flowmeter, and relates to the technical field of measuring instruments. The flowmeter pipeline comprises a measuring flow channel body and a mounting part, the measuring flow channel body is provided with an inlet and an outlet, and the inlet and the outlet are located on the same horizontal plane; the mounting part is communicated with the top of the measuring flow channel body; the mounting part is provided with two wedge-shaped pipes, each wedge-shaped pipe is provided with an energy converter, and a preset included angle is formed between central shafts of the two wedge-shaped pipes; a filter screen is arranged between the top of the measuring flow channel body and the pipe orifice of the wedge-shaped pipe of the mounting part, and the screen surface of the filter screen is parallel to the flowing direction of fluid; and fluid flows into the measuring flow channel body from the inlet and flows out of the measuring flow channel body from the outlet through the net surface of the filter net. According to the flow meter pipeline, the accuracy and reliability of flow measurement are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a flow meter pipeline and an ultrasonic flow meter. Background Art

[0002] Ultrasonic flowmeters are based on the principle that the propagation speed of ultrasound in a flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the speed of ultrasound in a stationary medium. They use non-contact measurement and do not require direct contact with the measured medium. The measuring structure is not affected by the viscosity or conductivity of the measured medium and can be used to measure the flow of various liquids or gases.

[0003] Ultrasonic flowmeters typically use a pair of ultrasonic transducers installed in a pipe to transmit and receive ultrasonic signals. While the propagation speed of ultrasonic waves in a stationary fluid is constant, when the fluid is flowing, the speed of the ultrasonic waves traveling downstream and upstream varies depending on the fluid's velocity, resulting in a propagation time difference. This time difference, along with the relevant formulas, can be used to calculate the fluid's velocity and, consequently, the flow rate.

[0004] Although ultrasonic flowmeters can quickly measure flow in a non-contact manner using the propagation velocity difference method, when installing the transducer, the offset of the installation angle and the installation position error may cause the flow field in the pipeline to be distorted, thereby affecting the measurement accuracy; in addition, the turbulent changes of the fluid will also affect the measurement accuracy. Utility Model Content

[0005] The purpose of the utility model is to provide a flow meter pipeline and an ultrasonic flow meter, which improve the accuracy and reliability of flow measurement by arranging a filter between a mounting portion and a measuring flow channel body.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] In one aspect of the present invention, a flow meter pipeline is provided, comprising a measuring flow channel body and a mounting portion, wherein the measuring flow channel body has an inlet and an outlet, and the inlet and the outlet are located in the same horizontal plane; the mounting portion is connected to the top of the measuring flow channel body; the mounting portion has two wedge-shaped tubes, each wedge-shaped tube is provided with a transducer, and the central axes of the two wedge-shaped tubes have a preset angle; a filter is installed between the top of the measuring flow channel body and the pipe mouth of the wedge-shaped tube of the mounting portion, and the mesh surface of the filter is arranged parallel to the flow direction of the fluid; the fluid flows into the measuring flow channel body from the inlet, and flows out of the measuring flow channel body from the outlet through the mesh surface of the filter.

[0008] Optionally, the filter screen includes at least one, and when the filter screen includes multiple, the multiple filter screens are stacked along the arrangement direction of the mounting portion and the measuring flow channel body.

[0009] Optionally, the mesh size of the filter is 50 to 300 meshes.

[0010] Optionally, the mesh of the filter is circular, diamond-shaped or hexagonal.

[0011] Optionally, the mounting portion has two mounting platforms on one side facing the measuring channel body. The two mounting platforms are arranged opposite to each other on the side wall of the mounting portion with a preset interval, and the opposite sides of the filter are respectively arranged on the top surfaces of the two mounting platforms.

[0012] Optionally, the mounting platform has a first mounting hole, and second mounting holes are correspondingly provided on opposite sides of the filter screen. The fasteners pass through the first mounting hole and the second mounting hole in sequence to fix the filter screen to the mounting platform.

[0013] Optionally, the cross section of the measuring channel body is rectangular.

[0014] Optionally, the flow meter pipeline includes at least one mounting portion. When there are multiple mounting portions, the multiple mounting portions are staggered on both sides of the measuring channel body, or the multiple mounting portions are spaced apart along the extension direction of the measuring channel body.

[0015] Another aspect of the present invention provides an ultrasonic flowmeter, comprising two transducers and a flowmeter pipeline; the flowmeter pipeline comprises a measuring flow channel body and a mounting portion, and the two transducers are respectively arranged in two wedge-shaped tubes of the mounting portion; the measuring flow channel body has a reflective inner wall surface, the mounting portion is arranged opposite to the reflective inner wall surface, the transducing end faces of the two transducers are both facing the center of the reflective inner wall surface of the measuring flow channel body, and the transducing end faces of the two transducers are arranged at an angle α.

[0016] Optionally, 40°≤α≤60°.

[0017] The beneficial effects of the present invention include at least one of the following:

[0018] The present application provides a flow meter pipeline, comprising a measuring channel body and a mounting portion. The measuring channel body has an inlet and an outlet, the inlet and outlet being located in the same horizontal plane. The mounting portion is connected to the top of the measuring channel body. The mounting portion has two wedge-shaped tubes, each equipped with a transducer, and the central axes of the two wedge-shaped tubes are arranged at a predetermined angle to facilitate the transmission and reception of ultrasonic signals by the two transducers. A filter is installed between the top of the measuring channel body and the orifices of the wedge-shaped tubes of the mounting portion, with the mesh surface of the filter being arranged parallel to the flow direction of the fluid. The fluid flows into the measuring channel body from the inlet and flows out of the measuring channel body through the mesh surface of the filter at the outlet. The filter screen can rectify the flow, making the fluid more uniform and stable during passage, and reducing local turbulence and eddies caused by the signal tube. The filter screen can also change the flow characteristics of the fluid near the signal tube. It can block some irregular flow and make the fluid tend to flow in the mainstream direction, thereby reducing or eliminating negative flow velocity in the signal tube. This ensures that the flow velocity measured by ultrasonic wave more accurately reflects the actual flow conditions of the fluid. In addition, the filter can also reduce signal noise caused by fluid instability, further improving the reliability and accuracy of measurement. The above flow meter pipeline improves the accuracy and reliability of flow measurement.

[0019] The present application also provides an ultrasonic flowmeter comprising two transducers and a flowmeter conduit; the flowmeter conduit comprises a measuring channel body and a mounting portion, with two transducers disposed within two wedge-shaped tubes of the mounting portion, respectively; the measuring channel body comprises a reflective inner wall surface, the mounting portion is disposed opposite the reflective inner wall surface, the transducing end faces of the two transducers are aligned with the center of the reflective inner wall surface of the measuring channel body, and the transducing end faces of the two transducers are disposed at an angle α. The configuration of the flowmeter conduit improves the accuracy and reliability of flow measurement in the ultrasonic flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of a flow meter pipeline provided by an embodiment of the present utility model;

[0022] Figure 2 A top view of a flow meter pipeline provided by an embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of fluid distribution in an existing flow meter pipeline;

[0024] Figure 4 A schematic diagram of the fluid distribution in the flow meter pipeline provided by an embodiment of the present utility model;

[0025] Figure 5 A schematic diagram of the flow velocity distribution of the fluid along the propagation path of the ultrasonic wave emitted from the flow meter pipe provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the flow velocity distribution of the fluid passed through on the propagation path of the received ultrasonic wave in the flow meter pipeline provided by an embodiment of the present utility model.

[0027] Icons: 100-flow meter pipe; 110-measuring channel body; 111-reflective inner wall surface; 120-installation part; 121-wedge tube; 122-installation platform; 130-filter; a-gas flow direction. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] Please refer to Figure 1 The present embodiment provides a flow meter pipeline 100, comprising a measuring channel body 110 and a mounting portion 120, wherein the measuring channel body 110 has an inlet and an outlet, and the inlet and the outlet are located in the same horizontal plane; the mounting portion 120 is connected to the top of the measuring channel body 110; the mounting portion 120 has two wedge-shaped tubes 121, each of which is provided with a transducer, and the central axes of the two wedge-shaped tubes 121 have a preset angle; a filter screen 130 is installed between the top of the measuring channel body 110 and the pipe mouth of the wedge-shaped tube 121 of the mounting portion 120, and the mesh surface of the filter screen 130 is arranged parallel to the flow direction of the fluid; the fluid flows into the measuring channel body 110 from the inlet, and flows out of the measuring channel body 110 from the outlet through the mesh surface of the filter screen 130.

[0035] Specifically, the present application provides a flow meter pipe 100, which consists of a measuring channel body 110 and a mounting portion 120. The measuring channel body 110 has an inlet and an outlet at both ends, and fluid can flow into the measuring channel body 110 through the inlet and flow out of the measuring channel body 110 through the outlet.

[0036] One end of the mounting portion 120 is connected to the top of the measuring channel body 110; the mounting portion 120 has two wedge-shaped tubes 121, each of which is provided with a transducer, one of which is a transmitting transducer and the other is a receiving transducer, and the two transducers in the mounting portion 120 are used in conjunction with each other; the measuring channel body also includes a reflective inner wall surface 111, and the ultrasonic signal emitted by the transmitting transducer in the mounting portion 120 is emitted by the wedge-shaped tube 121 toward the reflective inner wall surface 111, and is received by the receiving transducer after being reflected by the reflective inner wall surface 111. Since there is fluid flowing through the measuring channel body, the propagation time of the ultrasonic signal in the downstream and upstream directions is different. By measuring this time difference, the flow velocity of the fluid can be calculated according to the formula, and then the flow value can be obtained.

[0037] However, during the assembly process of the transducer, the installation error of the transducer will affect the measurement accuracy of the flow. When the transducer is installed deeper in the wedge tube 121, the installation will cause the flow field to be distorted, affecting the propagation of the ultrasonic signal. Figure 3 As shown, Figure 3 The flow distribution along the gas flow direction a within the existing flowmeter pipeline is shown. This fluid distribution diagram shows that when the transducer is installed deep within the wedge-shaped tube 121, the flow field inside the tube 121 is distorted, resulting in a negative flow velocity and a low measurement value. When the transducer is positioned protruding from the mouth of the wedge-shaped tube 121, the flow velocity in the measurement channel may be incomplete, affecting the accurate flow measurement. Furthermore, changes in fluid turbulence can also affect measurement accuracy.

[0038] To address the above technical issues, the flowmeter pipe 100 of the present application further includes a filter screen 130. The filter screen 130 is positioned between the top of the measuring channel body 110 and the opening of the wedge-shaped tube 121 of the mounting portion 120. The mesh surface of the filter screen 130 is arranged parallel to the direction of fluid flow. Fluid flowing into the measuring channel body 110 can flow out of the outlet through the mesh surface of the filter screen 130.

[0039] After installing a layer of filter 130, the filter 130 can play a role in rectifying the flow. The pore structure of the filter 130 can make the fluid more uniform and stable when passing through, reducing the local turbulence and eddy current caused by the measuring flow channel body 110, such as Figure 4 As shown in the flow meter pipe 100, the flow distribution along the gas flow direction a is provided. It can be seen that the flow meter pipe 100 of the present application can effectively reduce the flow field distortion and vortex in the wedge tube 121, improve the measurement accuracy, improve the distortion of the flow field, and have little effect on the propagation of ultrasonic waves; at the same time, the filter 130 can change the flow characteristics of the fluid in the measuring channel body 110, it can block part of the irregular flow, and make the fluid tend to flow along the mainstream direction, thereby reducing or eliminating the negative flow velocity in the signal tube. Please refer to Figure 5 and Figure 6 The flow distribution of ultrasonic waves along the propagation path of an existing flowmeter pipe without filter 130 and a flowmeter pipe 100 of the present invention with filter 130 demonstrates that the flow velocity distribution of the flowmeter pipe 100 of the present invention is uniform and eliminates negative flow velocity. This ensures that the flow velocity measured by ultrasonic waves more accurately reflects the actual flow conditions of the fluid. Furthermore, filter 130 can reduce signal noise caused by fluid instability, further improving measurement reliability and accuracy.

[0040] It should be noted that in one embodiment of the present application, first, at least one filter screen 130 is provided. If multiple filter screens 130 are provided, the multiple filter screens 130 are stacked along the orientation of the mounting portion 120 and the measurement channel body 110. Adjacent filter screens 130 may be spaced apart or positioned adjacent to each other, and this application imposes no restrictions on this.

[0041] By disposing a plurality of filter screens 130 , the fluid can be made more uniform and stable when passing through, and the negative flow rate in the signal pipe can be further reduced or eliminated.

[0042] Second, the mesh number of the filter 130 is 50 to 300 meshes. For the flow meter pipeline 100 of the present application, the mesh number of the filter 130 needs to be maintained within a reliable and efficient range. On the one hand, the mesh number cannot be too low. If the mesh number of the filter 130 is too low, its filtering effect is not obvious, and it cannot effectively reduce the flow field distortion and vortex in the signal tube, and it is difficult to fully improve the distortion of the flow field; on the other hand, the mesh number cannot be too high. A mesh number that is too high will increase the resistance to the passage of the fluid, which may cause poor fluid flow and even produce local pressure changes at the filter 130, which will also have an adverse effect on the measurement accuracy. At the same time, a mesh number that is too high may make the filter 130 too fine and easily clogged by impurities in the fluid, requiring frequent cleaning or replacement of the filter 130, increasing maintenance costs and operating difficulty.

[0043] Third, the mesh of the filter 130 is circular, diamond or hexagonal. Figure 2 The mesh of the filter screen 130 is shown as a diamond-shaped embodiment. Of course, in addition to the above mesh shapes, other shapes such as triangles can also be used, and this application does not impose any limitation on this.

[0044] Fourth, to improve the transducer's efficiency in emitting and receiving ultrasonic signals, the measuring channel body 110 has a rectangular cross-section, meaning it has a rectangular structure. This arrangement ensures that the sidewalls of the measuring channel body 110 are all rectangular, and the reflective inner wall surface 111 has a large reflective area. Consequently, the transducer's efficiency in emitting and receiving ultrasonic signals is improved compared to a circular tube.

[0045] The flow meter pipeline 100 provided in the present application includes a measuring channel body 110 and a mounting portion 120. The measuring channel body 110 has an inlet and an outlet, and the inlet and the outlet are located in the same horizontal plane; the mounting portion 120 is connected to the top of the measuring channel body 110; the mounting portion 120 has two wedge-shaped tubes 121, each wedge-shaped tube 121 is provided with a transducer, and the central axes of the two wedge-shaped tubes 121 have a preset angle so that the two transducers can realize the transmission and reception of ultrasonic signals; a filter screen 130 is installed between the top of the measuring channel body 110 and the pipe mouth of the wedge-shaped tube 121 of the mounting portion 120, and the mesh surface of the filter screen 130 is arranged parallel to the flow direction of the fluid; the fluid flows into the measuring channel body 110 from the inlet, and flows out of the measuring channel body 110 from the outlet through the mesh surface of the filter screen 130. The provision of the filter 130 can act as a rectifying agent, making the fluid more uniform and stable as it passes through, and reducing local turbulence and eddies caused by the signal tube; the filter 130 can change the flow characteristics of the fluid near the signal tube. It can block some irregular flows, making the fluid more inclined to flow along the mainstream direction, thereby reducing or eliminating negative flow velocities in the signal tube. This ensures that the flow velocity measured by ultrasonic waves more accurately reflects the actual flow conditions of the fluid. In addition, the filter 130 can also reduce signal noise caused by fluid instability, further improving the reliability and accuracy of the measurement. The above-mentioned flowmeter pipeline 100 improves the accuracy and reliability of flow measurement.

[0046] In one embodiment of the present application, Figure 1 As shown, the mounting portion 120 has two mounting platforms 122 on one side facing the measuring channel body 110 . The two mounting platforms 122 are oppositely arranged on the side wall of the mounting portion 120 with a preset interval. The opposite sides of the filter 130 are respectively arranged on the top surfaces of the two mounting platforms 122 .

[0047] Specifically, if Figure 1 As shown, to facilitate assembly and disassembly of the filter 130, the mounting portion 120 has two mounting platforms 122 on the side facing the measuring channel body 110. Opposite sides of the filter 130 are respectively mounted on the top surfaces of the two mounting platforms 122, providing a certain degree of support for the filter 130. This arrangement not only facilitates assembly of the filter 130 but also facilitates timely cleaning or replacement of the filter 130 when it becomes clogged with impurities.

[0048] Optionally, the mounting platform 122 has a first mounting hole (not shown in the figure), and the filter screen 130 has corresponding second mounting holes on opposite sides. Fasteners pass through the first mounting hole and the second mounting hole in sequence to fix the filter screen 130 to the mounting platform 122.

[0049] Specifically, in order to further improve the connection stability between the filter 130 and the mounting platform 122, a first mounting hole is provided on the mounting platform 122, and a second mounting hole is correspondingly provided on the filter 130. The first mounting hole and the second mounting hole are coaxially arranged and have the same inner diameter. Fasteners are sequentially passed through the first mounting hole and the second mounting hole to fix the filter 130 to the mounting platform 122.

[0050] Of course, in addition to the above-mentioned method of stabilizing the filter 130 by fasteners, the connection stability between the filter 130 and the mounting platform 122 can also be improved by gluing, welding, etc. This application does not impose any restrictions on this, as long as the filter 130 can be stably connected to the mounting platform 122.

[0051] For example, the flow meter pipeline 100 includes at least one mounting portion 120. When there are multiple mounting portions 120 (not shown in the figure), the multiple mounting portions 120 are staggered on both sides of the measuring channel body 110, or the multiple mounting portions 120 are spaced apart along the extension direction of the measuring channel body 110.

[0052] Specifically, to further improve flow measurement efficiency, the flowmeter pipe 100 may include multiple mounting portions 120, staggered on either side of the measuring channel body 110, with each mounting portion 120 positioned opposite a reflective inner wall surface 111 to facilitate ultrasonic reflection. Alternatively, the multiple mounting portions 120 may be spaced apart along the extending direction of the measuring channel body 110, with each mounting portion 120 positioned opposite a reflective inner wall surface 111. This arrangement enables simultaneous measurement of fluid flow values ​​at multiple locations, improving measurement efficiency.

[0053] On the other hand, this embodiment further provides an ultrasonic flow meter (not shown in the figure), including two transducers and a flow meter pipe 100; the flow meter pipe 100 includes a measuring flow channel body 110 and a mounting portion 120, and the two transducers are respectively arranged in two wedge-shaped tubes 121 of the mounting portion 120; the measuring flow channel body 110 has a reflective inner wall surface 111, and the mounting portion 120 is arranged opposite to the reflective inner wall surface 111, and the transducing end faces of the two transducers are both facing the center of the reflective inner wall surface 111 of the measuring flow channel body 110, and the transducing end faces of the two transducers are set at an angle α.

[0054] Specifically, the present application also provides an ultrasonic flowmeter, which includes two transducers and a flowmeter pipe 100. The transducers are arranged in a wedge-shaped tube 121 in the mounting portion 120 of the flowmeter pipe 100, and a transducer is arranged in each wedge-shaped tube 121. The transducer end faces of the two transducers are aligned with the center of the reflective inner wall surface 111 of the measuring channel body 110. The ultrasonic signal emitted by one transducer can be reflected by the center of the reflective inner wall surface 111 and received by the other transducer. In order to facilitate the accurate reception of the ultrasonic signal, the transducer end faces of the two transducers are set at an angle α, optionally 40°≤α≤60°.

[0055] The specific structure and beneficial effects of the flow meter pipe 100 have been described in detail above and will not be repeated here. The ultrasonic flow meter improves the accuracy and reliability of flow measurement through the arrangement of the flow meter pipe 100.

[0056] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A flow meter pipeline, characterized in that: The invention comprises a measuring channel body (110) and a mounting portion (120), wherein the measuring channel body (110) has an inlet and an outlet, and the inlet and the outlet are located in the same horizontal plane; the mounting portion (120) is communicated with the top of the measuring channel body (110); the mounting portion (120) has two wedge-shaped tubes (121), each of the wedge-shaped tubes (121) is provided with a transducer, and the central axes of the two wedge-shaped tubes (121) have a preset angle; a filter screen (130) is installed between the top of the measuring channel body (110) and the pipe opening of the wedge-shaped tube (121) of the mounting portion (120), and the mesh surface of the filter screen (130) is arranged parallel to the flow direction of the fluid; the fluid flows into the measuring channel body (110) from the inlet and flows out of the measuring channel body (110) from the outlet through the mesh surface of the filter screen (130).

2. The flow meter pipeline according to claim 1, characterized in that The filter screen (130) includes at least one. When the filter screen (130) includes a plurality of filter screens (130), the plurality of filter screens (130) are stacked along the arrangement direction of the mounting portion (120) and the measuring flow channel body (110).

3. The flow meter pipeline according to claim 1, characterized in that The mesh size of the filter (130) is 50 to 300 meshes.

4. The flow meter pipeline according to claim 1, characterized in that The mesh of the filter (130) is circular, diamond-shaped or hexagonal.

5. The flow meter pipeline according to claim 1, characterized in that The mounting portion (120) has two mounting platforms (122) on one side facing the measuring flow channel body (110), the two mounting platforms (122) are arranged oppositely on the side wall of the mounting portion (120) and have a preset interval, and the opposite sides of the filter (130) are respectively arranged on the top surfaces of the two mounting platforms (122).

6. The flow meter pipeline according to claim 5, characterized in that The mounting platform (122) has a first mounting hole, and second mounting holes are correspondingly provided on opposite sides of the filter screen (130). Fasteners are sequentially passed through the first mounting hole and the second mounting hole to securely connect the filter screen (130) to the mounting platform (122).

7. The flow meter pipeline according to claim 1, characterized in that The cross section of the measuring flow channel body (110) is rectangular.

8. The flow meter pipeline according to claim 1, characterized in that The flow meter pipeline (100) includes at least one mounting portion (120). When there are multiple mounting portions (120), the multiple mounting portions (120) are staggeredly arranged on both sides of the measuring flow channel body (110), or the multiple mounting portions (120) are spaced apart along the extension direction of the measuring flow channel body (110).

9. An ultrasonic flow meter, characterized in that: The invention relates to a flow meter pipe (100) comprising two transducers and any one of claims 1 to 7; the flow meter pipe (100) comprises a measuring channel body (110) and a mounting portion (120), the two transducers being respectively arranged in two wedge-shaped tubes (121) of the mounting portion (120); the measuring channel body (110) having a reflective inner wall surface (111), the mounting portion (120) being arranged opposite to the reflective inner wall surface (111), the transducing end faces of the two transducers both facing the center of the reflective inner wall surface (111) of the measuring channel body (110), and the transducing end faces of the two transducers being arranged at an angle α.

10. The ultrasonic flow meter according to claim 9, characterized in that 40°≤α≤60°。

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