Ultrasonic measuring pipe and ultrasonic water meter

Abstract

The utility model discloses an ultrasonic wave measuring pipeline, include: the pipe body, the both ends of this flow passage are formed with a water inlet and a water outlet respectively, transmit the probe to emit ultrasonic wave, receive the probe to receive ultrasonic wave, the reflection piece includes first reflection piece, second reflection piece and center reflection sheet, first reflection piece and second reflection piece match transmit the probe and receive the probe respectively, are located in the opposite side of transmit the probe and receive the probe, center reflection sheet is located in the same side of transmit the probe and receive the probe. The utility model has the advantages of U type flow passage or V type flow passage, and the defects of traditional U type flow passage or V type flow passage are overcome, and the compact structure is shown to the body, and the size is smaller, and transmit the probe and receive the probe are arranged on the same side of the measuring sound channel, can adapt to ordinary sensor, greatly reduces the processing cost, reaches the multiple requirements of giving consideration to flow field quality, the body size and reducing processing difficulty.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic measurement technology, and more specifically to an ultrasonic measurement pipeline and an ultrasonic water meter. Background Technology

[0002] Ultrasonic flow measurement offers advantages such as wide measurement range, high accuracy, and maintenance-free operation. The time-of-flight method is a typical ultrasonic flow measurement method. It calculates the average flow velocity by measuring the time it takes for sound waves to propagate downstream and upstream in the flowing medium, and then multiplies this average velocity by the cross-sectional area of ​​the flow channel to obtain the flow rate. Ultrasonic water meters are instruments that use the time-of-flight method to measure water flow. However, due to the high speed of sound in water (up to 1500 m / s), the time difference corresponding to the minimum operating flow rate is often very small, only on the order of nanoseconds, making accurate measurement difficult. This problem is even more pronounced for small-diameter ultrasonic water meters because their smaller size results in a shorter effective transmission distance, with the minimum time difference potentially falling below 1 ns. Measuring such a short time difference with an accuracy of 2% is even more challenging. Therefore, the design of the acoustic channel in small-diameter water meters often aims to increase the effective transmission distance. A typical small-diameter ultrasonic water meter acoustic channel design is as follows: Figure 1 As shown, there are three main designs: U-shaped, V-shaped, and W-shaped.

[0003] The U-shaped transducer is positioned above the flow channel, using two reflectors within the channel to reflect sound waves. The effective transmission distance equals the transducer spacing. It is the most compact and easiest to manufacture overall. However, the reflectors are typically mounted on the centerline of the flow channel, limiting the measurement to velocities along the channel axis. Furthermore, the reflectors introduce pressure loss and negatively impact flow field quality and measurement accuracy. The V-shaped transducer utilizes reflectors on the side of the flow channel to reflect ultrasonic waves, addressing pressure loss and flow field quality issues. However, the effective transmission distance is shorter, and the transducer's tilted installation significantly increases the overall size, making it less compact and inconvenient to install. Additionally, the precision machining of the two reflectors... The difficulty and cost of installing each transducer mounting hole will increase significantly. The W-shaped design uses reflective elements installed on three side walls to form a W-shaped reflective configuration. The reflective elements are generally installed by combining a metal flow channel body and an injection-molded measuring tube. The transducer is installed on the metal flow channel body, and the reflective elements are mostly installed on the measuring tube by welding. The measuring tube is then installed inside the metal flow channel body. This installation method makes the reflective elements not securely installed, and the ultrasonic signal propagation path is affected by the assembly of the measuring tube, reflective elements, and flow channel body, resulting in poor consistency. At the same time, most transducers need to be installed at an angle, so the meter body is not compact enough.

[0004] In summary, the design of ultrasonic water meters should ensure that the measuring channel does not affect the flow field and does not cause additional pressure loss, measures as much flow velocity information as possible to reflect the true flow state, and meets the requirement of small size for easy processing. Utility Model Content

[0005] The description of this utility model introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this utility model proposes an ultrasonic measuring pipeline connected in series with a flow channel to measure the flow velocity of fluid flowing through the flow channel. The ultrasonic measuring pipeline includes: a pipe body connected in series at both ends of the flow channel to form an inlet and an outlet respectively; a transmitting probe for emitting ultrasonic waves; a receiving probe for receiving ultrasonic waves; and a reflector including a first reflector, a second reflector, and a central reflector. The first and second reflectors are respectively matched with the transmitting and receiving probes and are located directly opposite the transmitting and receiving probes. The central reflector is located on the same side of the transmitting and receiving probes.

[0007] Preferably, the tube body is provided with a first mounting through hole and a second mounting through hole, and the first mounting through hole and the second mounting through hole are respectively used to mount the transmitting probe and the receiving probe.

[0008] Preferably, the inner surface of the tube is provided with a first reflector fixing groove and a second reflector fixing groove, and the first reflector and the second reflector are respectively installed in the first reflector fixing groove and the second reflector fixing groove by interference fit, elastic element or glue.

[0009] Preferably, the transmitting probe, the central reflector, and the receiving probe are located on the same straight line on the tube body and are parallel to the central axis of the tube body.

[0010] The beneficial effects of this solution are as follows: This solution proposes an ultrasonic measurement pipeline with a V-shaped sound channel design, but the transducer is installed perpendicular to the tube body, thus combining the advantages of both U-shaped and V-shaped designs. Compared to the traditional V-shaped sound channel design, it increases the effective sound path, while the vertical installation of the transducer reduces the difficulty of tube body processing. Compared to the traditional U-shaped design, it reduces pressure loss.

[0011] Preferably, the transmitting probe, the central reflector, the receiving probe, the first reflector, and the second reflector are located on the same plane on the tube body, and the plane intersects with the plane containing the axis of the tube body.

[0012] The beneficial effects of this solution are as follows: The ultrasonic measuring pipeline proposed in this solution has a V-shaped sound channel design. The transducer is installed perpendicular to the pipe body and is not arranged on the axis. It measures the flow velocity information on the chord line, which provides a reference for the design of large-diameter water meters.

[0013] Preferably, the central reflector is located outside the plane formed by the transmitting probe, the receiving probe, the first reflector, and the second reflector.

[0014] The beneficial effects of this solution are as follows: The ultrasonic measurement pipeline proposed in this solution has the transmitting and receiving probes located on the same straight line, the sound channel is designed as a V-shaped sound channel, the transducer is installed perpendicular to the pipe body, and the flow velocity information on the chord is measured. It can be adapted to the design of water meters of all diameters.

[0015] Preferably, the central reflector is embedded in the tube body as a metal insert.

[0016] The beneficial effects of this solution are as follows: The ultrasonic measuring pipeline proposed in this solution has a central reflector embedded in the tube body, which solves the problem of unstable installation of the traditional reflector in the injection-molded measuring tube and can improve the service life of the measuring pipeline.

[0017] Preferably, the tube body has a central reflector mounting hole, which is located directly opposite the central reflector.

[0018] Preferably, it also includes a plug for sealing the mounting hole of the central reflector.

[0019] The beneficial effects of this solution are as follows: The ultrasonic measuring pipeline proposed in this solution has a central reflector mounting hole opened on the pipe body directly opposite the central reflector, which improves the installation efficiency of the central reflector.

[0020] Preferably, the diameter of the tube body is in the range of DN15 to DN40, and the angle between the incident ultrasonic wave emitted by the transmitting probe and the normal of the first reflector is in the range of 20 to 45°.

[0021] The beneficial effects of this solution are as follows: The ultrasonic measuring pipeline proposed in this solution is suitable for small-diameter water meters. The angle between the center line of the ultrasonic wave emitted by the transmitting probe and the normal of the first reflector, i.e., the channel angle, is optimally selected, providing a reference for the design of subsequent small-diameter water meters.

[0022] Preferably, the pipe also includes a grille, which is disposed at the inlet and / or outlet of the pipe.

[0023] The beneficial effects of this solution are as follows: The ultrasonic measurement pipeline proposed in this solution has a grid installed at the inlet or both the inlet and outlet of the pipe, which allows the fluid passing through the pipe to be mixed evenly. The measured flow velocity can accurately reflect the flow field information inside the pipe, thereby improving the measurement accuracy and precision.

[0024] Preferably, the tube body has a reduced diameter structure in the middle.

[0025] The beneficial effects of this solution are as follows: The ultrasonic measurement pipeline proposed in this solution has a reduced diameter structure in the middle of the pipe body, which makes the fluid flow velocity more stable and the measurement results more accurate within the measurement range of the transmitting and receiving probes.

[0026] An ultrasonic water meter, comprising an ultrasonic measuring pipeline as described in any one of the above claims.

[0027] The beneficial effects of this solution are as follows: The ultrasonic water meter proposed in this solution combines the advantages of both U-shaped and V-shaped flow channels, while overcoming the defects of traditional U-shaped or V-shaped flow channels. The meter body has a compact structure and small size, meeting the refined needs of modern life. At the same time, the transmitting and receiving probes are arranged on the same side of the measuring channel, which makes installation simple and can be adapted to ordinary sensors, greatly reducing the processing cost. It achieves multiple requirements of balancing flow field quality, meter body size, and reduced processing difficulty. Attached Figure Description

[0028] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0029] In the attached image:

[0030] Figure 1 This is a schematic diagram of a conventional ultrasonic water meter channel design in the background art of this utility model.

[0031] Figure 2 This is a schematic diagram of an ultrasonic measurement pipeline provided in Embodiment 1 of the present invention;

[0032] Figure 3 A top view and a side view of an ultrasonic measuring pipeline provided in Embodiment 2 of this utility model;

[0033] Figure 4 A top view and a side view of an ultrasonic measuring pipeline provided in Embodiment 3 of this utility model;

[0034] Figure 5 A front view of an ultrasonic measuring pipeline provided by this utility model;

[0035] Figure 6 An exploded view of an ultrasonic measuring pipeline provided for this utility model;

[0036] Figure 7 This is a schematic diagram of an ultrasonic measuring pipeline grid provided by the present invention.

[0037] In the picture:

[0038] 1. Transmitting probe 2. Receiving probe

[0039] 3. First reflector fixing groove; 4. Second reflector fixing groove

[0040] 5. First reflector; 6. Second reflector

[0041] 7. Central reflector 8. Central reflector mounting hole

[0042] 9. End cap; 10. PCB mounting box

[0043] 11. Water inlet 12. Water outlet

[0044] 13. Inlet grille 14. Outlet grille

[0045] 15. Pipe body Detailed Implementation

[0046] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0047] To fully understand this invention, a detailed description will be provided below. Obviously, the implementation of this invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this invention are described in detail below; however, other embodiments may also be possible besides these detailed descriptions.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0049] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0050] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0051] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0052] Example 1

[0053] Figure 2 This is a schematic diagram of an ultrasonic measurement pipeline provided in Embodiment 1 of this utility model.

[0054] An ultrasonic measuring pipeline, connected in series with a flow channel, is used to measure the flow velocity of fluid flowing through the channel. The ultrasonic measuring pipeline includes: a pipe body connected in series at both ends of the flow channel, forming an inlet and an outlet respectively; a transmitting probe for emitting ultrasonic waves; a receiving probe for receiving ultrasonic waves; and reflectors including a first reflector, a second reflector, and a central reflector. The first and second reflectors are respectively matched to the transmitting and receiving probes and are located directly opposite them. The central reflector is located on the same side of the transmitting and receiving probes, between them, and can be embedded in the pipe body as a metal insert, or its position can be smoothed during pipe body processing. If the central reflector is embedded in the pipe body as a metal insert, a central reflector mounting hole can be formed on the pipe body, located directly opposite the central reflector. A plug can also be added to seal the central reflector mounting hole. The pipe body is provided with a first mounting through hole and a second mounting through hole, which are used to mount the transmitting and receiving probes respectively. The inner surface of the tube has a first reflector fixing groove and a second reflector fixing groove. The first reflector and the second reflector are respectively installed in the first reflector fixing groove or the second reflector fixing groove by interference fit, elastic element or glue. The transmitting probe, the central reflector and the receiving probe are located on the same straight line on the tube and are parallel to the central axis of the tube.

[0055] In this embodiment, both the transmitting and receiving probes are transducers, but other sensors can be selected depending on the actual situation. During installation, the first and second reflectors are first inserted into the first and second mounting through holes, respectively, and then interference-fitted into the first and second reflector mounting slots. The first and second reflectors can also be fixed to the first and second reflector mounting slots using elastic elements or adhesive. Next, two transducers are installed. The central reflector is installed through the central reflector mounting hole, or it can be directly polished during processing. Because the first and second reflector mounting slots serve a positioning function, and the position of the central reflector is also fixed, the direct correspondence between the transducers and reflectors is ensured during processing, preventing deviation of the reflection path.

[0056] During the measurement process, the first transducer emits ultrasonic waves, which are reflected by the central reflector of the first reflector and the second reflector, and then received by the second transducer. Simultaneously, the second transducer also emits ultrasonic waves, which are reflected by the second reflector, the central reflector, and the first reflector, and then received by the first transducer. Because fluid flows through the pipe, the time it takes for the ultrasonic waves to be received in the direction of flow (co-current and counter-current) is different, resulting in a time difference. By calculating this time difference and the flow velocity, the flow rate can be calculated.

[0057] In this embodiment, the transducer is installed perpendicular to the tube body, minimizing the tube size. Simultaneously, the internal effective measurement path is V-shaped, combining the advantages of both U-shaped and V-shaped channel designs.

[0058] Compared to the traditional U-shaped transducer design, this layout provides a more secure fixation of the reflector, reducing pressure loss and effectively rectifying the flow field. It also eliminates the need for internal measuring tubes, saving costs. This structural layout allows for a smaller water meter size, making it more suitable for intelligent applications.

[0059] Example 2

[0060] Figure 3 The images show a top view and a side view of an ultrasonic measuring pipeline provided in Embodiment 2 of this utility model.

[0061] An ultrasonic measuring conduit, connected in series with a flow channel, is used to measure the flow velocity of fluid flowing through the channel. The ultrasonic measuring conduit includes: a tube body connected in series at both ends of the flow channel, forming an inlet and an outlet respectively; a transmitting probe for emitting ultrasonic waves; a receiving probe for receiving ultrasonic waves; and reflectors including a first reflector, a second reflector, and a central reflector. The first and second reflectors are respectively matched to the transmitting and receiving probes and are located directly opposite them. The central reflector is located on the same side of the transmitting and receiving probes and is embedded in the tube body as a metal insert. Alternatively, the central reflector can be polished to form the central reflector. If embedded in the tube body as an insert, a central reflector mounting hole can be formed on the tube body, located directly opposite the central reflector. An additional plug is required to seal the central reflector mounting hole. The tube body has a first mounting through hole and a second mounting through hole, which are used to mount the transmitting and receiving probes respectively. The inner surface of the tube is provided with a first reflector fixing groove and a second reflector fixing groove. The first reflector and the second reflector are respectively installed in the first reflector fixing groove and the second reflector fixing groove by interference fit, elastic element or glue. The transmitting probe, the central reflector, the receiving probe, the first reflector and the second reflector are located on the same plane on the tube, and the plane intersects with the plane of the tube axis.

[0062] In this embodiment, the transmitting probe, the central reflector, and the receiving probe are located on the same arc on the tube body and are arranged in sequence. The transmitting probe is perpendicular to the first reflector and the receiving probe is perpendicular to the second reflector. Therefore, these five components are located on a plane, but this plane is not parallel to the vertical plane where the tube body axis is located. These two planes may intersect or may be perpendicular to each other.

[0063] In this embodiment, the flow field information tested by the transducer is the flow field information of the tube chord, which solves the defect of measuring the maximum flow velocity information, namely the problem of large fluctuations in the flow field.

[0064] Example 3

[0065] Figure 4 This is a schematic diagram of an ultrasonic measurement pipeline provided in Embodiment 3 of this utility model.

[0066] An ultrasonic measuring conduit, connected in series with a flow channel, is used to measure the flow velocity of fluid flowing through the channel. The ultrasonic measuring conduit includes: a tube body connected in series at both ends of the flow channel, forming an inlet and an outlet respectively; a transmitting probe for emitting ultrasonic waves; a receiving probe for receiving ultrasonic waves; and reflectors including a first reflector, a second reflector, and a central reflector. The first and second reflectors are respectively matched to the transmitting and receiving probes and are located directly opposite them. The central reflector is located on the same side of the transmitting and receiving probes and is embedded in the tube body as a metal insert. Alternatively, the central reflector can be polished to form the central reflector. If embedded in the tube body as an insert, a central reflector mounting hole can be formed on the tube body, located directly opposite the central reflector. An additional plug is required to seal the central reflector mounting hole. The tube body has a first mounting through hole and a second mounting through hole, which are used to mount the transmitting and receiving probes respectively. The inner surface of the tube is provided with a first reflector fixing groove and a second reflector fixing groove. The first reflector and the second reflector are respectively installed in the first reflector fixing groove and the second reflector fixing groove by interference fit, elastic element or glue. The central reflector is located outside the plane formed by the transmitting probe, the receiving probe, the first reflector and the second reflector.

[0067] In this embodiment, the central reflector, transmitting probe, and receiving probe are not collinear; they form a triangular arrangement. The transmitting probe, receiving probe, first reflector, and second reflector are located on the same plane, while the central reflector is located outside this plane. The ultrasonic waves emitted by the transmitting probe are reflected by the first reflector, central reflector, and second reflector and then received by the receiving probe. Simultaneously, the ultrasonic waves emitted by the receiving probe are reflected by the second reflector, central reflector, and first reflector and then received by the transmitting probe. The entire reflection path is a V-shaped reflection, measuring the flow velocity information along the pipe chord. The advantage of this measurement is that it obtains more flow field information and more accurately reflects the flow field conditions.

[0068] Example 4

[0069] An ultrasonic measuring pipeline, connected in series with a flow channel, is used to measure the flow velocity of fluid flowing through the channel. The ultrasonic measuring pipeline includes: a pipe body connected in series at both ends of the flow channel, forming an inlet and an outlet respectively; a transmitting probe for emitting ultrasonic waves; a receiving probe for receiving ultrasonic waves; and reflectors including a first reflector, a second reflector, and a central reflector. The first and second reflectors are respectively matched to the transmitting and receiving probes and are located directly opposite them. The central reflector is located on the same side of the transmitting and receiving probes, between them, and can be embedded in the pipe body as a metal insert, or its position can be smoothed during pipe body processing. If the central reflector is embedded in the pipe body as a metal insert, a central reflector mounting hole can be formed on the pipe body, located directly opposite the central reflector. A plug can also be added to seal the central reflector mounting hole. The pipe body is provided with a first mounting through hole and a second mounting through hole, which are used to mount the transmitting and receiving probes respectively. The inner surface of the tube has a first reflector fixing groove and a second reflector fixing groove. The first reflector and the second reflector are respectively installed in the first reflector fixing groove or the second reflector fixing groove by interference fit, elastic element or glue. The transmitting probe, the central reflector and the receiving probe are located on the same straight line on the tube and are parallel to the central axis of the tube. The diameter of the tube ranges from DN15 to DN40, and the angle between the incident ultrasonic wave emitted by the transmitting probe and the normal of the first reflector ranges from 20° to 45°.

[0070] In this embodiment, the tube body has a reduced diameter structure in the middle, and the transmitting probe, receiving probe, first reflector, central reflector and second reflector are all located within the reduced diameter range. The advantage of this design is that it can reduce the size of the tube body and make the ultrasonic water meter sufficiently compact.

[0071] In this embodiment, a grid can also be set at the inlet of the pipe, or a grid can be set at both the inlet and outlet. This allows the fluid to mix more evenly, and the measured flow velocity information can more accurately reflect the flow field. At the same time, after rectification, the flow field is less affected by structures such as bends.

[0072] The difference between this embodiment and Embodiment 1 is that the diameter range of the pipe body is limited. It is generally used for the design of small-diameter water meters. The angle between the incident ultrasonic wave emitted by the transmitting probe and the normal of the first reflector is the channel angle. When the diameter range is DN15 to DN40, the channel angle range of 20 to 45° is optimal, which provides a reference for the design of small-diameter water meters.

[0073] Example 5

[0074] Figure 5 and Figure 6The images show a front view and an exploded view of an ultrasonic measuring pipeline provided by this utility model.

[0075] An ultrasonic measuring conduit, connected in series with a flow channel, is used to measure the flow velocity of fluid flowing through the channel. The ultrasonic measuring conduit includes: a tube body 15 connected in series at both ends of the flow channel, forming an inlet 11 and an outlet 12; a transmitting probe 1 for transmitting ultrasonic waves; a receiving probe 2 for receiving ultrasonic waves; and reflectors, including a first reflector 5 and a second reflector 6, which are respectively matched to the transmitting probe 1 and the receiving probe 2. The tube body 15 has a first mounting through hole and a second mounting through hole, which respectively mount the transmitting probe 1 and the receiving probe 2. The inner surface of the tube body has a first reflector fixing groove 3 and a second reflector fixing groove 4, whereby the first reflector 5 and the second reflector 6 are respectively mounted to the first reflector fixing groove 3 and the second reflector fixing groove 4 by interference fit, elastic element, or adhesive. It also includes a central reflector 7, located between the transmitting probe 1 and the receiving probe 2, which is embedded in the tube body 15 as a metal insert. The tube body 15 has a central reflector mounting hole 8, which is located between the first reflector fixing groove 3 and the second reflector fixing groove 4. It also includes a plug 9, which is used to seal the central reflector mounting hole 8.

[0076] In this embodiment, the central reflector mounting hole 8 is formed on the tube body 15, located between the first reflector fixing groove 3 and the second reflector fixing groove 4, directly opposite the central reflector 7. During installation, the central reflector 7 enters the tube body 15 through the central reflector mounting hole 8 and is installed on the other side of the tube body. This method is relatively easy to implement from both a manufacturing and installation perspective. Furthermore, compared to the traditional method of inserting a measuring tube inside a metal tube section, this method of installing the central reflector 7 is more secure and less prone to falling off. It also eliminates the problems of measuring tube fixation and measuring tube sliding with the fluid causing measurement path deviation. After installation, a plug 9 is installed to seal the central reflector mounting hole 8.

[0077] A PCB mounting box 10 is installed below the transmitting probe 1 and the receiving probe 2. The data cables of the transmitting probe 1 and the receiving probe 2 pass through the first mounting through hole and the second mounting through hole and are connected to the PCB. The PCB is fixed in the PCB mounting box 10. At the same time, the PCB mounting box 10 can also be made into a metal shielding structure to shield against external electromagnetic interference. The surfaces of the first mounting through hole and the second mounting through hole can also be made into metal shielding covers, so that the entire water meter metering part can achieve the effect of shielding against external electromagnetic interference.

[0078] This embodiment also includes an inlet grille 13 or an outlet grille 14, which can serve as a flow straightener. During installation, whether in a straight or curved pipe, the grille can disrupt and thoroughly mix the fluid, resulting in a more uniform flow into the pipe and improving measurement accuracy. Figure 7 This is a schematic diagram of an ultrasonic measuring pipeline grid provided by this utility model. The grid has six ribs, two of which are interference-fitted with the pipe body to provide a limiting function. During processing, two tracks are machined at the pipe inlet to facilitate the installation and positioning of the grid. This method of installation is simple and secure. After the grid is installed, the pressure loss is less than 16 kPa.

[0079] like Figure 5 and Figure 6 As shown, an inlet grille 13 is interference-fitted to the inlet 11 of the pipe body 15, and an outlet grille 14 can also be interference-fitted to the outlet 12 of the pipe body 15. Figure 5 This is only one installation scenario for Example 5, and the grille in Example 5 is not limited to this one type of ultrasonic measuring pipeline.

[0080] In this embodiment, the tube body has a reduced diameter structure in the middle. For example... Figure 6 As shown, the diameter D of the outer pipe and the diameter d of the inner pipe are different. The diameter D of the outer pipe is determined according to the nominal diameter of the water pipe, such as DN15, DN50, DN100, etc., while the diameter d of the inner pipe is determined according to the technical specifications of the water meter, such as pressure loss, flow velocity, time difference, etc.

[0081] When the diameter d of the inner tube is reduced, the fluid enters the inner tube region, the overall flow velocity increases, the flow field becomes more uniform, and the measurement accuracy is higher.

[0082] Example 6

[0083] An ultrasonic water meter includes an ultrasonic measuring pipeline as described in any of the above embodiments. In this solution, the transducer is installed directly above the pipe body, and a commercially available cylindrical transducer can be used, saving costs. Simultaneously, this installation method occupies a smaller volume. The transmitting probe, receiving probe, first reflector, second reflector, and central reflector are all located in the reduced-diameter section, which improves measurement accuracy while also accommodating the length requirements of the water meter pipeline, minimizing the water meter's size to meet current market demands.

[0084] In this solution, there is no injection-molded measuring tube inside the metal flow channel body, eliminating the need to consider the mold opening and installation of the injection-molded measuring tube, saving costs and reducing assembly difficulty. At the same time, it ensures the consistency of the reflection path of the reflector, preventing the injection-molded measuring tube from sliding due to fluid flow and improving measurement accuracy.

[0085] This solution proposes an ultrasonic water meter that combines the advantages of U-shaped or V-shaped flow channels while overcoming the shortcomings of traditional U-shaped or V-shaped flow channels. The meter body has a compact structure and small size, meeting the refined needs of modern life. At the same time, the transmitting and receiving probes are arranged on the same side of the measuring channel, making installation simple and compatible with common sensors, greatly reducing processing costs. It achieves multiple requirements of balancing flow field quality, meter body size, and reduced processing difficulty.

[0086] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An ultrasonic measuring conduit, connected in series with a flow channel to measure the flow velocity of fluid flowing through the flow channel, characterized in that, The ultrasonic measurement pipeline includes: The pipe body is connected in series at both ends of the flow channel to form an inlet and an outlet respectively; A transmitting probe, used to emit ultrasonic waves; A receiving probe, used to receive ultrasonic waves; The reflector includes a first reflector, a second reflector, and a central reflector; the first and second reflectors are respectively matched to the transmitting probe and the receiving probe, and are located directly opposite the transmitting probe and the receiving probe; the central reflector is located on the same side of the transmitting probe and the receiving probe.

2. The ultrasonic measuring pipeline according to claim 1, characterized in that, The tube body is provided with a first mounting through hole and a second mounting through hole, and the first mounting through hole and the second mounting through hole are respectively used to install the transmitting probe and the receiving probe.

3. The ultrasonic measuring pipeline according to claim 1, characterized in that, The inner surface of the tube is provided with a first reflector fixing groove and a second reflector fixing groove. The first reflector and the second reflector are respectively installed in the first reflector fixing groove and the second reflector fixing groove by interference fit, elastic element or glue.

4. The ultrasonic measuring pipeline according to claim 1, characterized in that, The transmitting probe, the central reflector, and the receiving probe are located on the same straight line on the tube body and are parallel to the central axis of the tube body.

5. The ultrasonic measuring pipeline according to claim 1, characterized in that, The transmitting probe, central reflector, receiving probe, first reflector, and second reflector are located on the same plane on the tube body, and the plane intersects with the plane containing the axis of the tube body.

6. The ultrasonic measuring pipeline according to claim 1, characterized in that, The central reflector is located outside the plane formed by the transmitting probe, the receiving probe, the first reflector, and the second reflector.

7. An ultrasonic measuring pipeline according to any one of claims 4 to 6, characterized in that, The central reflector is embedded in the tube as a metal insert.

8. An ultrasonic measuring pipeline according to claim 7, characterized in that, The tube body has a central reflector mounting hole, which is located directly opposite the central reflector.

9. An ultrasonic measuring pipeline according to claim 8, characterized in that, It also includes a plug, which is used to seal the mounting hole of the central reflector.

10. An ultrasonic measuring pipeline according to claim 4, characterized in that, The diameter of the tube body ranges from DN15 to DN40, and the angle between the center line of the ultrasonic wave emitted by the transmitting probe and the normal of the first reflector ranges from 20 to 45°.

11. An ultrasonic measuring pipeline according to claim 1, characterized in that, It also includes a bar screen, which is disposed at the inlet and / or outlet of the pipe body.

12. The ultrasonic measuring pipeline according to claim 1, characterized in that, The tube body has a reduced diameter structure in the middle.

13. An ultrasonic water meter, characterized in that, Includes an ultrasonic measuring pipeline as described in any one of claims 1 to 12.

Images