Ultrasonic flowmeter

Abstract

The utility model provides an ultrasonic flowmeter which comprises a shell, a reflector assembly and a transducer assembly, and the shell is provided with a flow channel arranged in the axial direction of the shell; the transducer assembly is located on the side of the shell and comprises a first transducer and a second transducer. The reflector assembly comprises at least three reflectors, the at least three reflectors are arranged at intervals in the axial direction of the shell and distributed at intervals in the circumferential direction of the shell, two of the reflectors are arranged opposite to the first transducer and the second transducer respectively, and the other reflectors are located between the first transducer and the second transducer. According to the ultrasonic flowmeter, the propagation path of ultrasonic waves can be prolonged, the ultrasonic waves are propagated along the flow channel in a spiral shape, fluid information of different positions of the section of the flow channel can be carried, and the measurement precision can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid flow measurement, in particular to an ultrasonic flow meter. BACKGROUND

[0002] The ultrasonic flow meter can convert the flow rate into flow according to the information of the fluid flow rate carried by the ultrasonic wave when the ultrasonic wave propagates in the flowing fluid through a signal processing algorithm. According to different detection methods, the ultrasonic flow meter can be divided into different types such as propagation velocity difference method, Doppler method, beam deflection method, noise method and correlation method. The pipe section ultrasonic flow meter is based on the principle of "velocity difference method" and is used to measure the liquid flow in the pipe section. It uses advanced multi-pulse technology, signal digital processing technology and error correction technology, which can better adapt to the field environment, and is more convenient, economical and accurate in measurement. It can be widely used in many fields such as petroleum, chemical industry, metallurgy, electric power and water supply.

[0003] At present, the flow sensor structure of the commonly used pipe section ultrasonic flow meter is twice reflection. After the ultrasonic wave is emitted, it is reflected twice by the reflection unit on the pipeline wall, and then captured by the receiver, so as to obtain the fluid flow rate information.

[0004] However, the ultrasonic flow sensor of twice reflection measures the center flow rate of the pipe section. The relationship between the center flow rate and the average flow rate will change with the uncertainty of the fluid state, so there will be a large measurement error in actual application. CONTENT OF THE INVENTION

[0005] The present application provides an ultrasonic flow meter. By increasing the number of reflection units and prolonging the ultrasonic wave propagation path, the ultrasonic wave propagates along the flow passage in a spiral shape, which can carry the fluid information at different positions of the flow passage cross section, effectively improve the measurement accuracy and reduce the measurement error.

[0006] The present application provides an ultrasonic flow meter, which comprises a shell, a reflector assembly and a transducer assembly. The shell has a flow passage arranged along its axial direction. The transducer assembly is located on the side of the shell, and the transducer assembly comprises a first transducer and a second transducer. The reflector assembly comprises at least three reflectors.

[0007] Among them, the at least three reflectors are arranged at intervals along the axial direction of the shell, and the at least three reflectors are arranged at intervals around the circumference of the shell. Two reflectors are arranged opposite to the transducer assembly, and the other reflectors are arranged between the transducer assemblies.

[0008] As an optional way, the present application provides an ultrasonic flow meter. The first transducer and the second transducer are respectively configured to emit and receive sound waves. The at least three reflectors are configured to reflect the sound waves between the first transducer and the second transducer in sequence. The reflection path of the sound wave is arranged in a spiral along the axial direction of the flow passage.

[0009] As an optional mode, the application provides an ultrasonic flowmeter, the axial direction of the shell is X direction, the Y direction is perpendicular to the X direction, and the Z direction is perpendicular to the XY plane.

[0010] The transducer assembly is arranged along the Y direction relative to the shell; the reflector opposite to the transducer assembly is located on the side of the shell away from the transducer assembly, and the reflecting surface of the reflector is inclined relative to the YZ plane.

[0011] As an optional mode, the application provides an ultrasonic flowmeter, the number of reflectors is even, and the transducer assemblies are located on one side of the shell along the Y direction, and the reflectors opposite to the transducers are located on the other side of the shell along the Y direction.

[0012] The plurality of reflectors between the transducer assemblies are alternately arranged on both sides of the shell along the Z direction, and the reflecting surface of the reflector is arranged to be inclined relative to the XZ plane.

[0013] The reflector assembly includes a first reflector, a second reflector, a third reflector and a fourth reflector.

[0014] The first reflector is opposite to one of the transducer assemblies, and the reflecting surface of the first reflector is inclined relative to the X, Y and Z directions and faces the second reflector.

[0015] The reflecting surface of the second reflector is inclined relative to the X, Y and Z directions and faces the third reflector.

[0016] The reflecting surface of the third reflector is inclined relative to the X, Y and Z directions and faces the fourth reflector.

[0017] The fourth reflector is opposite to the other of the transducer assemblies, and the reflecting surface of the fourth reflector is inclined relative to the X, Y and Z directions.

[0018] As an optional mode, the application provides an ultrasonic flowmeter, the reflecting surface of the reflector is inclined relative to the X, Y and Z directions, and the angle is less than or equal to 60°.

[0019] As an optional mode, the application provides an ultrasonic flowmeter, the spacing size between adjacent reflectors is 35mm-45mm.

[0020] As an optional mode, the application provides an ultrasonic flowmeter, a first mounting seat is arranged outside the shell, the first mounting seat has a first accommodating groove, and the transducer assembly is arranged in the first accommodating groove; the transducer assembly includes a transducer body, the first accommodating groove is in communication with the flow channel, and the transducer body is arranged towards the inside of the flow channel.

[0021] As an optional mode, the ultrasonic flowmeter provided by the application further comprises a sealing ring, a compression nut, a sealing gasket and a sealing cover. The sealing ring is arranged between the bottom of the first accommodating groove and the transducer body. The compression nut is arranged on the side of the transducer body away from the sealing ring. The sealing gasket is arranged on the end face of the first mounting seat. The sealing cover is arranged to compress the sealing gasket and connect with the first mounting seat.

[0022] As an optional mode, the ultrasonic flowmeter provided by the application further comprises a second mounting seat arranged on the outside of the shell. The second mounting seat has a second accommodating groove. The reflector is arranged in the second accommodating groove. The second accommodating groove is communicated with the flow channel. The reflector is arranged towards the inside of the flow channel.

[0023] The ultrasonic flowmeter provided by the application comprises a shell, a reflector assembly and a transducer assembly. The shell has a flow channel arranged along the axial direction thereof. The transducer assembly is arranged on the side of the shell. The transducer assembly comprises a first transducer and a second transducer. The reflector assembly comprises at least three reflectors. The at least three reflectors are arranged in the axial direction of the shell and are distributed in the circumferential direction of the shell. Two reflectors are arranged opposite to the first transducer and the second transducer respectively. The other reflectors are arranged between the first transducer and the second transducer. The ultrasonic flowmeter provided by the application can prolong the ultrasonic propagation path, so that the ultrasonic waves propagate along the flow channel in a spiral shape, can carry the fluid information of different positions in the flow channel cross section, and can effectively improve the measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application. Those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0025] Figure 1 The first perspective structural view of the ultrasonic flowmeter provided by the embodiment of the application is shown in the figure.

[0026] Figure 2 The second perspective structural view of the ultrasonic flowmeter provided by the embodiment of the application is shown in the figure.

[0027] Figure 3 The third perspective structural view of the ultrasonic flowmeter provided by the embodiment of the application is shown in the figure.

[0028] Figure 4 The internal structure of the transducer provided by the embodiment of the application is shown in the figure.

[0029] Figure 5 The internal structure of the reflector provided by the embodiment of the application is shown in the figure.

[0030] Figure 6 A sound wave reflection path diagram provided for an embodiment of the present application.

[0031] Reference signs:

[0032] 100 - housing;

[0033] 200 - transducer assembly; 201 - first mounting seat; 202 - first accommodating groove; 203 - transducer body; 204 - sealing ring; 205 - compression nut; 206 - sealing gasket; 207 - sealing cover; 208 - sealing cover bolt; 210 - first transducer; 220 - second transducer;

[0034] 300 - reflector assembly; 301 - second mounting seat; 302 - second accommodating groove; 310 - first reflector; 320 - second reflector; 330 - third reflector; 340 - fourth reflector. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application and above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information, without departing from the scope of the present text.

[0037] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to the determination".

[0038] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise.

[0039] It should be further understood that the terms "comprise", "comprising", "include", "including", "contain", "containing", "have", "having", "consist", "consisting", "consisting of" indicate the presence of the specified feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups.

[0040] The terms "or" and "and / or" as used herein are to be interpreted as inclusive, or meaning any one or any combination. Therefore, "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive is an exception to this definition presented.

[0041] The ultrasonic flow meter can convert the flow rate into flow rate according to the signal processing algorithm according to the information carried by the ultrasonic wave when propagating in the flowing fluid. According to the detection method, the ultrasonic flow meter can be divided into different types such as propagation velocity difference method, Doppler method, beam deviation method, noise method and correlation method. The pipe section ultrasonic flow meter is used for measuring the liquid flow in the pipe section according to the principle of "velocity difference method", which uses advanced multi-pulse technology, signal digital processing technology and error correction technology, which can better adapt to the field environment, and the measurement is more convenient, economical and accurate. It can be widely used in many fields such as petroleum, chemical industry, metallurgy, electric power, water supply and drainage. At present, the flow sensor structure of the commonly used pipe section ultrasonic flow meter is twice reflection, the ultrasonic wave is transmitted twice by the reflection unit on the pipe wall, and then captured by the receiver, so as to obtain the fluid flow rate information. However, the ultrasonic flow sensor of twice reflection measures the center flow rate of the pipe section, and the relationship between the center flow rate and the average flow rate will change with the uncertainty of the fluid state, so there will be a large measurement error in actual application. The present application provides an ultrasonic flow meter, a plurality of reflectors of different positions and different angles are arranged in the measuring pipe section, so that the propagation path of the ultrasonic wave is longer, and more fluid information can be carried through different positions of the pipe section cross section, thereby improving the measurement precision.

[0042] The present application provides an ultrasonic flow meter, which comprises a shell 100, a reflector assembly 300 and a transducer assembly 200, the shell 100 has a flow channel arranged along its axial direction; the transducer assembly 200 is located on the side of the shell 100, and the transducer assembly 200 comprises a first transducer 210 and a second transducer 220; the reflector assembly 300 comprises at least three reflectors. Wherein, the at least three reflectors are arranged at intervals along the axial direction of the shell 100, and the at least three reflectors are distributed at intervals around the circumference of the shell 100, two reflectors are arranged opposite to the first transducer 210 and the second transducer 220 respectively, and the other reflectors are located between the first transducer 210 and the second transducer 220.

[0043] It can be understood that the first transducer 210 and the second transducer 220 can be arranged at the inlet end and the outlet end of the flow channel respectively, when the flow meter body is large, the first transducer 210 and the second transducer 220 are arranged at the inlet end and the outlet end of a section of the flow channel, and the reflectors are still arranged between the first transducer 210 and the second transducer 220.

[0044] As Figures 1 to 3 , the ultrasonic flowmeter can be a pipe section ultrasonic flowmeter, the shell 100 is a hollow pipe through which the fluid medium passes. The transducer assembly 200 includes a first transducer 210 and a second transducer 220, and the reflector assembly 300 includes at least three reflectors, preferably four reflectors, which make the ultrasonic wave propagate for a longer time and pass through different positions of the pipe section cross section, carrying more fluid information. Two reflectors are arranged opposite the first transducer 210 and the second transducer 220, respectively, and the other two reflectors are arranged between the first transducer 210 and the second transducer 220. By adjusting the angle and distance of the reflectors, the sound waves can be reflected and transmitted between the reflectors. According to the axial propagation direction of the sound waves along the shell 100, the four reflectors can be named as a first reflector 310, a second reflector 320, a third reflector 330 and a fourth reflector 340. The first reflector 310 is used to receive the sound waves transmitted by the first transducer 210 opposite to it, and the fourth reflector 340 is used to reflect the sound waves to the second transducer 220 opposite to it.

[0045] As an optional way, the ultrasonic flowmeter provided by the application is provided. The transducer assembly 200 is configured to transmit and receive sound waves, respectively, and at least three reflectors are configured to sequentially reflect sound waves between the first transducer 210 and the second transducer 220. The reflection path of the sound waves is arranged in a spiral along the axial direction of the shell 100 in the flow passage.

[0046] The transducer assembly 200 includes a first transducer 210 and a second transducer 220, wherein the first transducer 210 is used to convert an electrical signal into mechanical vibration to generate a sound wave; the second transducer 220 is used to receive the sound wave and convert the mechanical vibration into an electrical signal, which is transmitted to a processor in the transducer assembly 200 and converted into a flow rate, which is displayed on an instrument panel. The number of reflectors can be set to four, and the reflectors are arranged at different positions so that the sound waves pass through different pipe section positions. By adjusting the angle of the reflectors, the sound waves can propagate and reflect between the transducers and the reflectors, and between the reflectors. By setting appropriate positions and angles of the reflectors, the sound waves can propagate in a spiral-like manner along the axial direction of the shell 100 in the flow passage.

[0047] As an optional way, the ultrasonic flowmeter provided by the application is provided. The axial direction of the shell 100 is the X direction, the Y direction is perpendicular to the X direction, and the Z direction is perpendicular to the XY plane.

[0048] The transducer assembly 200 is arranged in the Y direction relative to the shell 100; the reflectors opposite the transducer assembly 200 are located on the side of the shell 100 away from the transducer 200, and the reflecting surface of the reflectors is inclined relative to the YZ plane.

[0049] AsFigures 1 to 3 A three-dimensional coordinate system is established with the axial direction of the ultrasonic flowmeter housing 100 as the X direction to describe the positions and installation angles of the transducers and reflectors. The reflecting surface of the reflector is inclined towards the YZ plane, which enables the reflector to receive the sound waves transmitted by the transducers or reflectors and reflect the sound waves to the reflectors or transducers at a certain angle.

[0050] As an optional way, the ultrasonic flowmeter provided by the application has an even number of reflectors, and the transducer assemblies 200 are located on one side of the housing 100 along the Y direction, and the reflectors opposite to the transducers 200 are located on the other side of the housing 100 along the Y direction.

[0051] The plurality of reflectors between the transducer assemblies 200 are alternately arranged on both sides of the housing 100 along the Z direction, and the reflecting surface of the reflector is inclined towards the XZ plane.

[0052] As an optional way, the ultrasonic flowmeter provided by the application has a reflector assembly 300 including a first reflector 310, a second reflector 320, a third reflector 330 and a fourth reflector 340.

[0053] The first reflector 310 is opposite to one of the transducer assemblies 200, and the reflecting surface of the first reflector 310 is inclined towards the X, Y and Z directions and towards the second reflector 320.

[0054] The reflecting surface of the second reflector 320 is inclined towards the X, Y and Z directions and towards the third reflector 330.

[0055] The reflecting surface of the third reflector 330 is inclined towards the X, Y and Z directions and towards the fourth reflector 340.

[0056] The fourth reflector 340 is opposite to the other of the transducer assemblies 200, and the reflecting surface of the fourth reflector 340 is inclined towards the X, Y and Z directions.

[0057] As Figure 6In the three-dimensional coordinate system, the fluid flow direction is along the positive direction of the X axis, the first transducer 210 is a signal transmitting end, the signal transmitting plane of the first transducer 210 is perpendicular to the Y axis, and the signal transmitting direction is towards the negative direction of the Y axis. The first reflector 310 is opposite to the first transducer 210, the reflecting surface of the first reflector 310 is towards the positive half axis of the X axis, the Y axis and the Z axis, and the reflecting surface of the first reflector 310 is towards the second reflector 320. The first reflector 310 can receive the signal transmitted by the first transducer 210 and reflect the signal to the second reflector 320. The reflecting surface of the second reflector 320 is towards the positive direction of the X axis, the negative direction of the Y axis and the negative direction of the Z axis, and the reflecting surface of the second reflector 320 is towards the third reflector 330. The second reflector 320 can receive the reflected signal of the first reflector 310 and reflect the signal to the third reflector 330. The third reflector 330 has a small angle with the positive direction of the X axis, and has angles with the negative direction of the Y axis and the positive direction of the Z axis. The third reflector 330 is towards the fourth reflector 340. The third reflector 330 can receive the reflected signal of the second reflector 320 and reflect the signal to the fourth reflector 340. The fourth reflector 340 is opposite to the second transducer 220. The fourth reflector 340 has angles with the negative half axis of the X axis, the positive half axis of the Y axis and the negative half axis of the Z axis. The fourth reflector 340 can receive the reflected signal of the third reflector 330 and reflect the signal to the second transducer 220. The second transducer 220 is a signal receiving end. The signal receiving plane of the second transducer 220 is perpendicular to the Y axis, and the signal transmission direction of the second transducer 220 is towards the positive direction of the Y axis.

[0058] As an optional mode, the present application provides an ultrasonic flowmeter, the reflecting surface of the reflector is towards the X, Y and Z directions, and the angle is less than or equal to 60°.

[0059] The reflecting surface of the reflector is towards the X, Y and Z directions, and the angle is less than or equal to 60°. In the actual design and test process, when the reflecting surface of the reflector is towards the X, Y and Z directions and the angle is less than or equal to 60°, the installation position, the installation angle and the installation number of the reflector on the shell 100 of the ultrasonic flowmeter are determined. At this time, the sound wave propagation path is similar to a spiral shape, and the measurement effect can be achieved. If the above-mentioned angle is greater than 60°, the number of reflectors needs to be reduced, otherwise the reflecting surfaces of adjacent reflectors cannot correspond to each other to transmit the sound wave signal.

[0060] As an optional mode, the present application provides an ultrasonic flowmeter, the distance between adjacent reflectors is 35mm-45mm.

[0061] The distance between adjacent reflectors refers to the distance between the center points of adjacent reflectors. When the distance size is limited to 35mm-45mm, the installation position, the installation angle and the installation number of the reflector can be ensured.

[0062] As an optional mode, the application provides an ultrasonic flowmeter, the outer side of the shell 100 is provided with a first mounting seat 201, the first mounting seat 201 has a first accommodating groove 202, and the transducer 200 is arranged in the first accommodating groove 202; the transducer 200 comprises a transducer main body 203, the first accommodating groove 202 is communicated with the flow channel, and the transducer main body 203 is arranged towards the inside of the flow channel.

[0063] As Figure 4 , the transducer 200 is mounted in the first accommodating groove 202 of the first mounting seat 201, the first accommodating groove 202 is communicated with the flow channel, the matching layer of the transducer 200 is arranged towards the inside of the flow channel, so that the sound wave signal can be transmitted into the fluid medium.

[0064] As an optional mode, the application provides an ultrasonic flowmeter, the transducer 200 further comprises a sealing ring 204, a compression nut 205, a sealing gasket 206 and a sealing cover 207, the sealing ring 204 is abutted between the bottom of the first accommodating groove 202 and the transducer main body 203, the compression nut 205 is abutted on the side of the transducer main body 203 away from the sealing ring 204, the sealing gasket 206 is abutted on the end face of the first mounting seat 201, and the sealing cover 207 compresses the sealing gasket 206 and is connected with the first mounting seat 201.

[0065] The sealing ring 204 is used for sealing to prevent the fluid medium from entering the accommodating groove; the compression nut 205 is used for compressing the transducer main body 203 and the sealing ring 204, so as to ensure the sealing effect of the sealing ring 204; the sealing gasket 206 and the sealing cover 207 are used for sealing the other side of the accommodating groove relative to the sealing ring 204, and the sealing gasket 206 and the sealing cover 207 are fixed by a sealing cover bolt 208.

[0066] As an optional mode, the application provides an ultrasonic flowmeter, the outer side of the shell 100 is provided with a second mounting seat 301, the second mounting seat 301 has a second accommodating groove 302, and the reflector is arranged in the second accommodating groove 302; the second accommodating groove 302 is communicated with the flow channel, and the reflector is arranged towards the inside of the flow channel.

[0067] As Figure 5 , the reflector is mounted in the second accommodating groove 302 of the second mounting seat 301, and the mounting components required by the reflector are the same as the mounting components required by the transducer 200, including the sealing ring 204, the compression nut 205, the sealing gasket 206 and the sealing cover 207, and the mounting mode is consistent with the mounting mode of the transducer 200.

[0068] The application provides an ultrasonic flowmeter, which comprises a shell 100, a reflector assembly 300 and a transducer assembly 200, the shell 100 has a flow channel arranged along the axial direction thereof; the transducer assembly 200 is arranged at the side of the shell 100, and the transducer assembly 200 comprises a first transducer 210 and a second transducer 220; the reflector assembly 300 comprises at least three reflectors, the at least three reflectors are arranged at intervals along the axial direction of the shell 100 and are distributed at intervals around the circumferential direction of the shell 100, two reflectors are arranged opposite to the first transducer 210 and the second transducer 220 respectively, and the other reflectors are arranged between the first transducer 210 and the second transducer 220. The ultrasonic flowmeter provided by the application can prolong the ultrasonic propagation path, make the ultrasonic waves propagate along the flow channel in a spiral shape, carry the fluid information at different positions of the flow channel section, and effectively improve the measurement accuracy.

[0069] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. An ultrasonic flow meter, characterized in that: The invention comprises a housing (100), a reflector assembly (300) and a transducer assembly (200), wherein the housing (100) has a flow channel arranged along its axial direction; the transducer assembly (200) is located on the side of the housing (100), and the transducer assembly (200) comprises a first transducer (210) and a second transducer (220); and the reflector assembly (300) comprises at least three reflectors. The at least three reflectors are arranged at intervals along the axial direction of the shell (100), and the at least three reflectors are distributed at intervals around the circumference of the shell (100), two of the reflectors are arranged opposite to the first transducer (210) and the second transducer (220), respectively, and the other reflectors are located between the first transducer (210) and the second transducer (220).

2. The ultrasonic flowmeter according to claim 1, wherein: The first transducer (210) and the second transducer (220) are configured to transmit and receive sound waves, respectively, and the at least three reflectors are configured to sequentially reflect the sound waves between the first transducer (210) and the second transducer (220); the reflection path of the sound waves is arranged in an axial spiral along the shell (100) within the flow channel.

3. The ultrasonic flowmeter according to claim 1, wherein: The axial direction of the housing (100) is the X direction, the Y direction is perpendicular to the X direction, and the Z direction is perpendicular to the XY plane; The transducer assembly (200) is arranged along the Y direction relative to the housing (100); the reflector opposite to the transducer assembly (200) is located on a side of the housing (100) facing away from the transducer assembly (200), and the reflective surface of the reflector is inclined relative to the YZ plane.

4. The ultrasonic flowmeter according to claim 3, characterized in that The number of the reflectors is an even number, the transducer assembly (200) is located on one side of the housing (100) along the Y direction, and the reflector opposite to the transducer assembly (200) is located on the other side of the housing (100) along the Y direction; The plurality of reflectors between the transducer assemblies (200) are alternately arranged on both sides of the housing (100) along the Z direction, and the reflective surfaces of the reflectors are tilted relative to the XZ plane.

5. The ultrasonic flowmeter according to claim 4, characterized in that The reflector assembly (300) comprises a first reflector (310), a second reflector (320), a third reflector (330) and a fourth reflector (340); The first reflector (310) is opposite to one of the transducer assemblies (200), and a reflection surface of the first reflector (310) is oriented at an angle to the X, Y, and Z directions, and is oriented toward the second reflector (320); The reflection surface of the second reflector (320) is oriented at an angle to the X, Y and Z directions, and the reflection surface of the second reflector (320) faces the third reflector (330); The reflection surface of the third reflector (330) is oriented at an angle to the X, Y and Z directions, and is oriented towards the fourth reflector (340); The fourth reflector (340) is opposite to the other one of the transducer assemblies (200), and the reflection surface of the fourth reflector (340) has an angle with the X, Y, and Z directions.

6. The ultrasonic flowmeter according to claim 4, characterized in that The angles of the reflective surface of the reflector relative to the X, Y and Z directions are all less than or equal to 60°.

7. The ultrasonic flowmeter according to any one of claims 1 to 6, characterized in that: The distance between adjacent reflectors is 35 mm to 45 mm.

8. The ultrasonic flowmeter according to any one of claims 1 to 6, characterized in that: A first mounting seat (201) is provided on the outside of the shell (100), the first mounting seat (201) has a first accommodating groove (202), and the transducer assembly (200) is arranged in the first accommodating groove (202); the transducer assembly (200) includes a transducer body (203), the first accommodating groove (202) is communicated with the flow channel, and the transducer body (203) is arranged toward the inside of the flow channel.

9. The ultrasonic flowmeter according to claim 8, characterized in that The transducer assembly (200) further comprises a sealing ring (204), a clamping nut (205), a sealing gasket (206) and a sealing cover (207), wherein the sealing ring (204) abuts between the bottom of the first receiving groove (202) and the transducer body (203), the clamping nut (205) abuts against the side of the transducer body (203) facing away from the sealing ring (204), the sealing gasket (206) abuts against the end face of the first mounting seat (201), and the sealing cover (207) presses the sealing gasket (206) and is connected to the first mounting seat (201).

10. The ultrasonic flowmeter according to any one of claims 1 to 6, characterized in that: A second mounting seat (301) is provided on the outside of the shell (100), the second mounting seat (301) has a second accommodating groove (302), and the reflector is arranged in the second accommodating groove (302); the second accommodating groove (302) is communicated with the flow channel, and the reflector is arranged toward the inside of the flow channel.

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