Ultrasonic metering device and gas meter

Abstract

The utility model provides an ultrasonic metering device and a gas meter, and relates to the technical field of ultrasonic metering. The metering pipeline comprises a first transducer and a second transducer; the metering pipeline comprises a first wall face and a second wall face which are oppositely arranged, the second wall face is provided with an arc-shaped reflecting face, the section perpendicular to the flowing direction of fluid in the metering pipeline is a cross section, and the arc-shaped reflecting face is in an arc shape on the cross section. The first transducer and the second transducer are arranged on the first wall surface at an interval; the transmitting and receiving surfaces of the first transducer and the second transducer are respectively provided with a center; a first ray and a second ray with an included angle of alpha are formed by taking any center as an original point, the first ray and the second ray are symmetrically arranged relative to the middle vertical plane of the first wall surface, and the first ray and the second ray both have intersection points with the arc-shaped reflecting surface; the middle vertical plane is perpendicular to the cross section. According to the invention, the attenuation of the ultrasonic signal can be reduced, so that the precision and the detection efficiency of the ultrasonic metering device are improved.

Description

Technical Field

[0001] This application relates to the field of ultrasonic metering technology, and in particular to an ultrasonic metering device and a gas meter. Background Technology

[0002] An ultrasonic gas meter is a new type of gas meter. It includes a housing and an ultrasonic metering device installed inside the housing. The ultrasonic metering device typically includes a metering pipe and two transducers spaced apart on the metering pipe. The two transducers are used to measure the amount of gas passing through the metering pipe per unit time.

[0003] However, the ultrasonic signal generated by the transducer will attenuate during transmission in the metering pipeline, thereby reducing the accuracy and detection efficiency of the ultrasonic metering device. Utility Model Content

[0004] In view of the above problems, this application provides an ultrasonic metering device and a gas meter, which can reduce the attenuation of ultrasonic signals, thereby improving the accuracy and detection efficiency of the ultrasonic 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 metering pipeline, including:

[0007] A metering pipe includes a first wall and a second wall disposed opposite to each other, and the second wall has an arc-shaped reflective surface; the cross section perpendicular to the flow direction of the fluid in the metering pipe is a cross section, and the arc-shaped reflective surface is arc-shaped in the cross section;

[0008] A first transducer and a second transducer are disposed at a distance from each other on a first wall surface; the transmitting and receiving surfaces of the first transducer and the second transducer each have a center.

[0009] With any one of the centers as the origin, a first ray and a second ray are formed with an included angle α. The first ray and the second ray are symmetrically arranged with respect to the central perpendicular plane of the first wall surface, and both the first ray and the second ray intersect the arc-shaped reflective surface; wherein, the central perpendicular plane is perpendicular to the cross-section.

[0010] In one possible implementation, the first ray intersects the arc-shaped reflective surface to form a first intersection point, the second ray intersects the arc-shaped reflective surface to form a second intersection point, and the distance between the first intersection point and the second intersection point is a first distance;

[0011] The metering pipeline also includes a third wall and a fourth wall for connecting the first wall and the second wall, and the vertical distance between the third wall and the fourth wall is a second distance;

[0012] The first distance is less than or equal to the second distance.

[0013] In one possible implementation, the first distance is greater than or equal to 0.5 times the second distance.

[0014] In one possible implementation, at least a portion of the second wall surface is recessed in a direction away from the first wall surface to form the arcuate reflective surface.

[0015] In one possible implementation, the entire area of ​​the second wall is recessed in a direction away from the first wall, and the second wall is symmetrically arranged with respect to the central vertical surface.

[0016] In one possible implementation, on the same longitudinal section, any two points on the arc-shaped reflective surface are equidistant from one of the centers.

[0017] In one possible implementation, the first transducer and the second transducer are arranged symmetrically with respect to the centerline between them.

[0018] In one possible implementation, the first transducer and the second transducer are detachably connected to the metering pipe.

[0019] In one possible implementation, the first wall surface has two spaced-apart mounting portions, and each mounting portion has a mounting chamber;

[0020] The first transducer is inserted into one of the mounting chambers, and the second transducer is inserted into the other mounting chamber.

[0021] A second aspect of this application provides a gas meter including the ultrasonic metering device described in the first aspect.

[0022] In the ultrasonic metering device and gas meter provided in this application embodiment, the second wall of the metering pipe has an arc-shaped reflective surface. With any center as the origin, a first ray and a second ray with an included angle α are formed. The first ray and the second ray are symmetrically arranged with respect to the vertical plane of the first wall, and both the first ray and the second ray intersect with the arc-shaped reflective surface. In this way, the ultrasonic signal generated by one of the first transducers and the second transducer can be received by the other of the first transducer and the second transducer after being reflected at least once by the arc-shaped reflective surface. This avoids the ultrasonic signal being used for wall reflection connecting the first wall and the second wall, reduces the number of times the ultrasonic signal is reflected during transmission, achieves the purpose of converging sound waves and enhancing signal reflection intensity, and thus improves the accuracy and detection efficiency of the ultrasonic metering device.

[0023] 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 ultrasonic metering device and gas meter 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

[0024] 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.

[0025] Figure 1 A schematic diagram of the structure of an ultrasonic measuring device provided in related technologies. Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of an ultrasonic measuring device provided in related technologies. Figure 2 ;

[0027] Figure 3 A schematic diagram of the structure of an ultrasonic measuring device provided in related technologies. Figure 3 ;

[0028] Figure 4 Schematic diagram of the structure of the ultrasonic measuring device provided in the embodiments of this application Figure 1 ;

[0029] Figure 5 A schematic diagram of the ultrasonic signal emitted by the transducer provided in the embodiments of this application;

[0030] Figure 6 Schematic diagram of the structure of the ultrasonic measuring device provided in the embodiments of this application Figure 2 ;

[0031] Figure 7 Schematic diagram of the structure of the ultrasonic measuring device provided in the embodiments of this application Figure 3 .

[0032] Explanation of reference numerals in the attached figures:

[0033] 1: Metering pipe; 11: Top plate; 12: Bottom plate; 13: Side plate; 2: Transducer;

[0034] 1000: Ultrasonic measuring device;

[0035] 100: Metering pipeline;

[0036] 110: First wall surface; 112: First through hole; 113: Second through hole;

[0037] 120: Second wall surface; 121: Curved reflective surface; 1211: First intersection point; 1212: Second intersection point;

[0038] 130: Third wall surface;

[0039] 140: Installation Department;

[0040] 150: Fourth wall surface;

[0041] 200: First transducer;

[0042] 300: Second transducer. Detailed Implementation

[0043] As described in the background section, ultrasonic signals in related technologies experience attenuation during transmission through metering pipes. The inventors have discovered that the reason for this problem is... (Please refer to the appendix...) Figure 1 To be continued Figure 3 In the related technology, the metering pipe 1 has a rectangular cross-section and includes a top plate 11, a bottom plate 12, and a side plate 13 connecting the top plate 11 and the bottom plate 12. The top plate 11 serves as the mounting carrier for two transducers 2. When one transducer 2 emits an ultrasonic signal, the signal is first reflected by the bottom plate 12, then reflected onto the side plate 13, and then reflected at least once more by the side plate 13 before being received by the other transducer 2. The intensity of the ultrasonic signal attenuates during these multiple reflections, thus reducing the accuracy and detection efficiency of the ultrasonic metering device.

[0044] To address the aforementioned technical problems, this application provides an ultrasonic metering device and a gas meter in which the second wall of the metering pipe has an arc-shaped reflective surface. A first ray and a second ray, with an included angle α, are formed with any center as the origin. The first and second rays are symmetrically arranged relative to the perpendicular plane of the first wall, and both intersect the arc-shaped reflective surface. This allows the ultrasonic signal generated by either the first or second transducer to be reflected at least once by the arc-shaped reflective surface before being absorbed by the other transducer. This prevents the ultrasonic signal from being used to avoid reflections between the first and second walls, reducing the number of reflections during transmission and achieving the purpose of converging sound waves and enhancing signal reflection intensity, thereby improving the accuracy and detection efficiency of the ultrasonic metering device.

[0045] 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 only a part of the embodiments of this application, and not all of them. 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.

[0046] Please refer to the attached document. Figure 4 This application provides an ultrasonic metering device 1000 for measuring the flow rate of a fluid, wherein the fluid may include gas or liquid.

[0047] The ultrasonic metering device 1000 provided in this application embodiment includes a metering pipe 100 for fluid flow and the installation of some components.

[0048] The metering conduit 100 includes a first wall 110, which provides a mounting platform for the transducers of the ultrasonic metering device 1000. In other words, the first wall 110 is used to provide space between the two transducers of the ultrasonic metering device 1000. It should be noted that the ultrasonic metering device 1000 typically includes two transducers, which can be referred to as the first transducer 200 and the second transducer 300. The first transducer 200 and the second transducer 300 are spaced apart on the first wall 110.

[0049] The metering pipe 100 also includes a second wall surface 120, which is disposed opposite to the first wall surface 110, and the second wall surface 120 has an arc-shaped reflective surface 121. Figure 1 Taking the orientation shown as an example, the first wall surface 110 is the upper wall surface of the metering pipe 100, and the second wall surface 120 is the lower wall surface of the metering pipe 100.

[0050] Please refer to the attached document. Figure 4 and attached Figure 6 The cross section perpendicular to the flow direction of the fluid in the metering pipe is called the cross section, and the arc-shaped reflective surface 121 has an arc shape in the cross section. In other words, the cross section parallel to the flow direction of the fluid in the metering pipe is called the longitudinal section, and the arc-shaped reflective surface 121 has a straight line shape in the longitudinal section.

[0051] The transmitting and receiving surfaces of both the first transducer 200 and the second transducer 300 have a center. Please refer to the appendix. Figure 4 and attached Figure 5 In order to further define the features of the arc-shaped reflective surface 121, in this embodiment, the center of the transmitting and receiving surface of the first transducer 200 is designated as the first center A, and the center of the transmitting and receiving surface of the second transducer 300 is designated as the second center B.

[0052] Please continue to refer to the appendix. Figure 6 With any center as the origin, a first ray and a second ray are formed with an included angle α. The first ray and the second ray are symmetrically arranged with respect to the perpendicular plane of the first wall surface 110, and both the first ray and the second ray intersect the arc-shaped reflecting surface 121. The perpendicular plane is perpendicular to the cross-section. Please refer to the appendix. Figure 5 The ultrasonic signal generated by the first transducer 200 is fan-shaped, and α is the angle between the two waistlines of the fan.

[0053] The ultrasonic signal emitted by one of the first transducers 200 and the second transducer 300 is reflected at least once by the arc-shaped reflective surface 121 and then directly received by the other of the first transducers 200 and the second transducer 300. This avoids the ultrasonic signal being used for reflection by the wall connecting the first wall surface 110 and the second wall surface 120, reduces the number of times the ultrasonic signal is reflected during transmission, achieves the purpose of converging sound waves and enhancing signal reflection intensity, and thus improves the accuracy and detection efficiency of the ultrasonic measuring device 1000.

[0054] It should be noted that you should refer to the appendix. Figure 6 In this embodiment, the provided metering pipe 100 further includes a third wall surface 130 and a fourth wall surface 150. The third wall surface 130 and the fourth wall surface 150 are arranged opposite to each other and connect the first wall surface 110 and the second wall surface 120, so that the first wall surface 110, the second wall surface 120, the third wall surface 130, and the fourth wall surface 150 form the metering pipe 100. (See attached diagram) Figure 6 Taking the orientation shown as an example, the third wall 130 can be the left side wall of the metering pipe 100, and the fourth wall 150 can be the right side wall of the metering pipe 100.

[0055] Given that a first ray and a second ray are formed with an included angle α, with any center as the origin, and the first and second rays are symmetrically arranged with respect to the perpendicular plane of the first wall 110, and both the first and second rays intersect with the arc-shaped reflecting surface 121, the ultrasonic signal generated by one of the first transducers 200 and 300 will only be reflected by the other of the first transducers 200 and 300 after passing through either the first wall 110 or the first wall 110 and the second wall 120, and will not be reflected by the third wall 130 and the fourth wall 150. This reduces the number of times the ultrasonic signal is reflected during transmission, achieving the purpose of converging sound waves and enhancing signal reflection intensity. The first ray can be an auxiliary ray. Figure 6 In L1, the second ray can be attached Figure 6 L2.

[0056] In practical use, firstly, ultrasonic waves are sent from the first transducer 200 to the second transducer 300, and the flight time T1 of the ultrasonic waves is measured. Then, the second transducer 300 sends ultrasonic waves back to the first transducer 200, and the flight time T2 of the ultrasonic waves is measured. Since the flow of the gas to be detected affects the two flight times, they are different. The gas velocity can be obtained using a predefined formula, and thus the gas flow rate can be calculated. It should be noted that the formula used in this embodiment is existing technology, and will not be elaborated further in this embodiment.

[0057] Given that this embodiment improves the metering pipe 100 by making its reflective surface an arc-shaped emission surface, the ultrasonic signal generated by one of the first transducers 200 and the second transducer 300 can be received by the other of the first transducers 200 and the second transducer 300 after being reflected at least once by the arc-shaped reflective surface 121. This allows the ultrasonic signal to form a V-shaped, N-shaped, or W-shaped propagation path within the metering pipe 100, reducing the number of times the ultrasonic signal is reflected during transmission. This achieves the purpose of converging sound waves and enhancing signal reflection intensity, thereby improving the accuracy and detection efficiency of the ultrasonic metering device 1000. In addition, the arc-shaped reflective surface can also fully cover the transmission path of the ultrasonic signal, ensuring that the ultrasonic signal can be effectively reflected and focused.

[0058] In one possible implementation, please refer to the appendix. Figure 6 and attached Figure 7 The first ray intersects the arc-shaped reflective surface 121 to form a first intersection point 1211, and the second ray intersects the arc-shaped reflective surface to form a second intersection point 1212. The distance between the first intersection point 1211 and the second intersection point 1212 is the first distance D1. The vertical distance between the third wall surface 130 and the fourth wall surface 150 is the second distance D2.

[0059] Wherein, the first distance D1 is less than or equal to the second distance D2. In this way, it can be ensured that after the ultrasonic signal is emitted from the transducer of the first wall 110, it can hit the arc-shaped reflective surface 121 at a more suitable angle, which helps to reduce the energy loss of the ultrasonic signal during the reflection process and allows the reflected signal to propagate to the other transducer more directly and efficiently.

[0060] It is important to understand that when the first distance D1 is less than the second distance D2, it cannot be infinitely less than the second distance D2. In this embodiment, the first distance D1 is also greater than or equal to 0.5 times the second distance D2. This ensures that the curved reflective surface 121 has sufficient length to effectively guide and focus the signal, avoiding ultrasonic signal loss due to an excessively short reflective surface. Furthermore, the design of the curved reflective surface 121 not only helps reduce energy loss but also enhances the signal focusing effect. When the signal strikes the reflective surface, it is more effectively guided to the predetermined receiving point (i.e., another transducer). This focusing effect improves the signal reception efficiency, enabling the transducer at the receiving end to receive a stronger and clearer signal, thereby improving measurement accuracy.

[0061] In this embodiment, the arc-shaped reflective surface 121 can be formed directly from the second wall surface 120, or it can be implemented in other ways. Exemplarily, at least a portion of the second wall surface 120 is recessed in a direction opposite to the first wall surface 110 to form the arc-shaped reflective surface 121. Compared to other complex reflective structures, the manufacturing process of forming an arc-shaped reflective surface through recess is simpler. This design reduces processing steps and costs while maintaining good signal reflection and focusing performance.

[0062] It should be noted that the arc-shaped reflective surface 121 can be formed by a portion of the second wall surface 120 being recessed in a direction away from the first wall surface 110, or it can be formed by the entire second wall surface 120 being recessed in a direction away from the first wall surface 110. For example, the entire second wall surface 120 is recessed in a direction away from the first wall surface 110, and the second wall surface 120 is symmetrically arranged with respect to the central vertical surface. This ensures the uniformity of the reflection effect.

[0063] In this context, on the same longitudinal section, any two points on the arc-shaped reflective surface 121 are equidistant from one of its centers. In other words, any two points on the arc-shaped reflective surface 121 are equidistant from the first center A, and simultaneously, any two points on the arc-shaped reflective surface 121 are equidistant from the second center B.

[0064] The central axis formed by the first center A and the second center B ensures that the arc-shaped reflective surface 121 is a cylindrical surface formed around the central axis. This ensures that the ultrasonic signals generated by either the first transducer 200 or the second transducer 300 can be completely reflected by the arc-shaped reflective surface 121, thereby reducing the number of times the ultrasonic signals are reflected during transmission and achieving the purpose of converging sound waves and enhancing signal reflection intensity.

[0065] In one possible implementation, the first transducer 200 and the second transducer 300 are positioned relative to a centerline between them. For example, the center of the transmitting and receiving surface of the first transducer 200 is designated as a first center A, and the center of the transmitting and receiving surface of the second transducer 300 is designated as a second center B. The first transducer 200 and the second transducer 300 are symmetrically positioned with respect to the perpendicular centerline connecting the first center A and the second center B. This ensures that the ultrasonic signal transmission path between the first transducer 200 and the second transducer 300 is also symmetrical. This symmetry ensures a more uniform energy distribution during signal transmission, reducing signal attenuation and interference caused by path asymmetry.

[0066] In one possible implementation, the first transducer 200 and the second transducer 300 are detachably connected to the metering pipe 100. For example, two spaced-apart mounting portions 140 are also provided on the first wall surface 110 of the metering pipe 100, and each mounting portion 140 has a mounting chamber. The first transducer 200 is inserted into one mounting chamber, and the second transducer 300 is inserted into the other mounting chamber, thereby achieving a detachable connection between the first transducer 200 and the second transducer 300 and the metering pipe 100. In this way, the first transducer 200 and the second transducer 300 can be easily installed or removed from the metering pipe 100, which not only simplifies the installation process but also facilitates subsequent maintenance and replacement work, reducing maintenance costs and time.

[0067] To facilitate the transmission and reception of ultrasonic signals by the first transducer 200 and the second transducer 300, a first through hole 112 and a second through hole 113 are provided on the first wall surface 110 of the metering pipe 100. The first through hole 112 penetrates the first wall surface 110 along the thickness direction and is opposite to the first transducer 200; the second through hole 113 penetrates the first wall surface 110 along the thickness direction and is opposite to the second transducer 300.

[0068] It should be understood that the dimensions of the first through hole 112 and the second through hole 113 can be freely set according to the transducer model, as long as it can ensure that the first transducer 200 and the second transducer 300 can transmit and receive all ultrasonic signals.

[0069] This application also provides a gas meter, including the ultrasonic metering device 1000 described in any of the above embodiments. It should be understood that the gas meter provided in this embodiment also includes a housing, in which the ultrasonic metering device 1000 is installed.

[0070] Since the gas meter provided in this embodiment includes the ultrasonic metering device 1000 described in any of the above embodiments, it has all the structure and all the beneficial effects of the ultrasonic metering device 1000, and will not be described in detail here.

[0071] 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, and the same or similar parts between the embodiments can be referred to each other.

[0072] 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.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An ultrasonic measuring device, characterized in that, include: A metering pipeline, the metering pipeline including a first wall and a second wall disposed opposite to each other, and the second wall having an arc-shaped reflective surface; The cross section perpendicular to the flow direction of the fluid in the metering pipe is called a cross section, and the arc-shaped reflective surface has an arc shape on the cross section; A first transducer and a second transducer are disposed at a distance from each other on the first wall surface; the transmitting and receiving surfaces of the first transducer and the second transducer each have a center. With any one of the centers as the origin, a first ray and a second ray are formed with an included angle α. The first ray and the second ray are symmetrically arranged with respect to the central perpendicular plane of the first wall surface, and both the first ray and the second ray intersect the arc-shaped reflective surface; wherein, the central perpendicular plane is perpendicular to the cross-section.

2. The ultrasonic measuring device according to claim 1, characterized in that, The first ray intersects the arc-shaped reflective surface to form a first intersection point, and the second ray intersects the arc-shaped reflective surface to form a second intersection point; the distance between the first intersection point and the second intersection point is a first distance; The metering pipeline also includes a third wall and a fourth wall for connecting the first wall and the second wall, and the vertical distance between the third wall and the fourth wall is a second distance; The first distance is less than or equal to the second distance.

3. The ultrasonic measuring device according to claim 2, characterized in that, The first distance is greater than or equal to 0.5 times the second distance.

4. The ultrasonic measuring device according to any one of claims 1-3, characterized in that, At least a portion of the second wall surface is recessed in a direction away from the first wall surface to form the arc-shaped reflective surface.

5. The ultrasonic measuring device according to claim 4, characterized in that, The entire area of ​​the second wall is recessed in a direction away from the first wall, and the second wall is symmetrically arranged with respect to the central vertical surface.

6. The ultrasonic measuring device according to any one of claims 1-3, characterized in that, On the same longitudinal section, any two points on the arc-shaped reflective surface are equidistant from one of the centers.

7. The ultrasonic measuring device according to any one of claims 1-3, characterized in that, The first transducer and the second transducer are arranged symmetrically with respect to the center line between them.

8. The ultrasonic measuring device according to claim 7, characterized in that, The first transducer and the second transducer are detachably connected to the metering pipeline.

9. The ultrasonic measuring device according to claim 8, characterized in that, The first wall surface has two spaced-apart mounting portions, and each mounting portion has a mounting chamber; The first transducer is inserted into one of the mounting chambers, and the second transducer is inserted into the other mounting chamber.

10. A gas meter, characterized in that, Includes the ultrasonic measuring device according to any one of claims 1-9.

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