Ultrasonic measuring pipeline and ultrasonic water meter

Abstract

The measuring pipeline comprises a measuring pipeline, a first guiding pipeline and a second guiding pipeline, and the first guiding pipeline and the second guiding pipeline are located on the side face of the measuring pipeline and are communicated with the measuring pipeline through a first penetrating hole and a second penetrating hole respectively. The plane where the first guide pipeline is located is not coplanar with the plane where the measurement pipeline is located, and the plane where the second guide pipeline is located is not coplanar with the plane where the measurement pipeline is located; the transmitting probe is used for transmitting ultrasonic waves; the receiving probe is used for receiving ultrasonic waves; the reflecting pieces comprise the first reflecting piece and the second reflecting piece, and the first reflecting piece is arranged on the first guide pipeline and located below the transmitting probe; under the condition that the size of the meter body is not increased, the effective transmission distance can be increased, and meanwhile the multiple requirements for flow field quality, the size of the meter body and machining difficulty reduction are met.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic measurement, and more particularly to an ultrasonic measurement pipeline and an ultrasonic water meter. Background Art

[0002] Flow measurement using ultrasonic waves has the advantages of wide range, high precision, and maintenance-free. The time difference method is a typical ultrasonic flow measurement method. By measuring the time for sound waves to propagate downstream and upstream in a flowing medium through a circuit, the average flow velocity of the fluid is calculated, and then multiplied by the cross-sectional area of the flow channel to obtain the flow rate of the fluid. An ultrasonic water meter is a metering instrument that uses the time difference method to measure the water flow rate. Since the speed of sound in water is relatively high, up to 1500 m / s, the time difference corresponding to the minimum working flow rate is often very small, only on the order of nanoseconds, making it difficult to achieve accurate measurement. This problem is more serious for small-diameter ultrasonic water meters because of their smaller size and shorter effective transmission distance. The minimum time difference can be less than 1 ns, and it is even more difficult to measure such a short time difference with an accuracy of 2%. Therefore, the channel design of small-diameter water meters often aims to increase the effective transmission distance. Conventional channel designs for small-diameter ultrasonic water meters are as Figure 1 shown, mainly including three designs: U-shaped, V-shaped, and W-shaped.

[0003] For the U-shaped channel, the transducers are arranged above the flow channel, and the sound waves are reflected by two reflector plates in the flow channel. The effective transmission distance is equal to the transducer spacing. The overall size is the most compact and relatively easy to process, but it can only measure the flow velocity on the axis of the flow channel. At the same time, the reflector plates will cause pressure loss and affect the flow field quality and measurement accuracy. For the V-shaped channel, the reflector plates on the side of the flow channel are used to reflect the ultrasonic waves, which can solve the problems of pressure loss and flow field quality, but the effective transmission distance is shortened, and the transducers are installed obliquely, resulting in a significant increase in size, inconvenient installation, and a significant increase in the difficulty and cost of precisely machining the two transducer mounting holes. For the W-shaped channel, a W-shaped reflection configuration is formed by the reflector plates installed on three side walls. Although it can improve the problems of the V-shaped channel to a certain extent, the complexity and processing cost are significantly increased, and it is less used.

[0004] In summary, the design of an ultrasonic water meter should ensure that the measurement channel does not affect the flow field and does not cause additional pressure loss, measure as much flow velocity information as possible to reflect the real flow state, and meet the requirements of small size and easy processing. Summary of the Invention

[0005] A series of simplified concepts are introduced in the summary of the invention part, which will be further elaborated in the detailed implementation part. The summary of the invention part does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides an ultrasonic measurement pipeline, which is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. The ultrasonic measurement pipeline includes: a pipe body, which is connected in series with both ends of the flow channel to form a water inlet and a water outlet respectively, and includes a measurement pipeline, a first guiding pipeline and a second guiding pipeline. The first guiding pipeline and the second guiding pipeline are located on the side of the measurement pipeline and communicate with the measurement pipeline through a first through hole and a second through hole respectively. The plane where the first guiding pipeline is located is not coplanar with the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is not coplanar with the plane where the measurement pipeline is located; a transmitting probe, configured in the first guiding pipeline for transmitting ultrasonic waves; a receiving probe, configured in the second guiding pipeline for receiving ultrasonic waves; a reflecting member, including a first reflecting member and a second reflecting member. The first reflecting member is configured in the first guiding pipeline and is located below the transmitting probe; the second reflecting member is configured in the second guiding pipeline and is located below the receiving probe.

[0007] Preferably, the plane where the first guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located.

[0008] Preferably, the pipe body further includes a lining pipe, and the lining pipe is nested inside the measurement pipeline.

[0009] Preferably, the first guiding pipeline and the second guiding pipeline are located on the same side of the measurement pipeline.

[0010] Preferably, the reflecting member further includes a third reflecting member, and the third reflecting member is configured on the measurement pipeline.

[0011] Preferably, the reflecting member further includes a third reflecting member, a fourth reflecting member and a fifth reflecting member, and the third reflecting member, the fourth reflecting member and the fifth reflecting member are respectively configured on both sides of the measurement pipeline.

[0012] Preferably, the first guiding pipeline and the second guiding pipeline are located on both sides of the measurement pipeline.

[0013] Preferably, the distance between the center of the first reflecting member and the center of the transmitting probe is different from the distance between the center of the second reflecting member and the center of the receiving probe.

[0014] Preferably, the shapes of the transmitting probe and the receiving probe are cylindrical.

[0015] Preferably, a reduced-diameter portion is included between the inlet and the outlet of the lining pipe, and the reduced-diameter portion is used to reduce the cross-sectional area of the lining pipe, and both ends of the lining pipe are symmetrical.

[0016] Preferably, the longitudinal section of the reduced-diameter portion is square or rectangular, and the four corners of the square or rectangle are arc-shaped.

[0017] Preferably, the third reflector is fixed to one side of the reduced-diameter portion of the inner lining pipe.

[0018] Preferably, the third reflector and the fifth reflector are fixed to one side of the reduced-diameter portion of the inner lining pipe, and the fourth reflector is fixed to the other side of the reduced-diameter portion of the inner lining pipe.

[0019] Preferably, a sealing ring is provided in the gap between the inner lining pipe and the measuring pipe between the first perforation and the second perforation.

[0020] Preferably, a pressure relief hole is provided on the inner lining pipe.

[0021] Preferably, the reflecting surface of the first reflector forms an acute angle with the front end surface of the transmitting probe, and the reflecting surface of the second reflector forms an acute angle with the front end surface of the receiving probe.

[0022] Preferably, the transmitting probe is located between the transmitting probe fixing member and the inner protrusion of the first guiding pipe, and the transmitting probe fixing member and the top of the first guiding pipe are fixed by bolts; the receiving probe is located between the receiving probe fixing member and the inner protrusion of the second guiding pipe, and the receiving probe fixing member and the top of the second guiding pipe are fixed by bolts.

[0023] Preferably, the first reflector includes a first fixing block and a first movable block, the first fixing block is integrally cast with the first guiding pipe, and the first movable block and the first fixing block are jointly fixed by bolts and limit posts; the second reflector includes a second fixing block and a second movable block, the second fixing block is integrally cast with the second guiding pipe, and the second movable block and the second fixing block are jointly fixed by bolts and limit posts.

[0024] Preferably, the first reflector, the second reflector, the third reflector, the fourth reflector and the fifth reflector are made of stainless steel and the reflecting surfaces are mirror surfaces.

[0025] Preferably, the measuring pipe, the first guiding pipe and the second guiding pipe are integrally cast.

[0026] Preferably, a grille is provided at the water inlet or the water outlet of the pipe body.

[0027] Preferably, the inner lining pipe is limited and fixed by the first reflector and the second reflector.

[0028] Preferably, the third reflector, the fourth reflector and the fifth reflector are fixed to the inner lining pipe by heat melting.

[0029] An ultrasonic water meter includes an ultrasonic measuring pipeline as described in any one of the above.

[0030] Advantages of the present invention: The ultrasonic measurement pipeline and ultrasonic water meter proposed by the present invention can increase the effective transmission distance without increasing the size of the meter body; the transmitting probe and the receiving probe are arranged on the side of the measurement sound channel, which is easy to install and can be adapted to ordinary sensors, greatly reducing the processing cost. At the same time, it can solve the protrusion problem caused by arranging the sensor in the measurement flow channel area and minimize the interference to the flow field. Therefore, the three-dimensional V-shaped sound channel design combines the advantages of the conventional U-shaped and V-shaped sound channel designs and meets the multiple requirements of taking into account the flow field quality, meter body size, and reducing the processing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following drawings of the present invention are used as a part of the present invention to understand the present invention. The embodiments of the present invention shown in the drawings and their descriptions are used to explain the principles of the present invention.

[0032] In the drawings:

[0033] Figure 1 is a schematic diagram of the sound channel design of a conventional small-diameter ultrasonic water meter in the background technology of the present invention;

[0034] Figure 2 are a three-dimensional view and a top view of the three-dimensional V-shaped design of an ultrasonic measurement pipeline provided in Embodiment 1 of the present invention;

[0035] Figure 3 is a three-dimensional view of the three-dimensional W-shaped design of an ultrasonic measurement pipeline provided in Embodiment 2 of the present invention;

[0036] Figure 4 is a three-dimensional view of the opposite sound channel design of an ultrasonic measurement pipeline provided in Embodiment 3 of the present invention;

[0037] Figure 5 are a three-dimensional view and a left view of the chord V-shaped design of an ultrasonic measurement pipeline provided in Embodiment 4 of the present invention;

[0038] Figure 6 is an exploded view of an ultrasonic water meter provided in Embodiment 5 of the present invention;

[0039] Figure 7 is a longitudinal sectional view of an ultrasonic water meter provided in Embodiment 5 of the present invention;

[0040] Figure 8 is a schematic diagram of a reflector in a guiding pipeline.

[0041] In the figures:

[0042] 1. Measurement pipeline; 2. First guiding pipeline; 3. Second guiding pipeline; 4. Liner pipe;

[0043] 4-1. Reduced diameter part; 4-2. Sealing ring; 4-3. Pressure relief hole;

[0044] 5. First perforation; 6. Second perforation; 7. Transmitting transducer; 8. Receiving transducer;

[0045] 9. First reflector; 9-1. Fixed block; 9-2. Movable block; 10. Second reflector; 11. Reflective sheet of the third reflector; 12. First transducer fixing member; 13. Second transducer fixing member; 14. PCB board. Detailed implementation manners

[0046] In the following description, numerous specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other instances, in order to avoid confusion with the present invention, some well-known technical features are not described.

[0047] For a complete understanding of the present invention, a detailed description will be presented in the following. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention can also have other embodiments.

[0048] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0049] The ordinal numbers such as "first" and "second" cited in the present invention are only identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0050] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are only for illustrative purposes and are not restrictive.

[0051] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only 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 the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art.

[0052] Embodiment 1

[0053] Figure 2 A perspective view and a top view of a three-dimensional V-shaped design of an ultrasonic measurement pipeline provided for Embodiment 1 of the present invention.

[0054] An ultrasonic measurement pipeline is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. The ultrasonic measurement pipeline includes: a pipe body, with a water inlet and a water outlet formed at both ends connected in series with the flow channel, including a measurement pipeline, a first guiding pipeline, a second guiding pipeline, and a lining pipe. The first guiding pipeline and the second guiding pipeline are located on the side of the measurement pipeline and communicate with the measurement pipeline through a first perforation and a second perforation respectively. The plane where the first guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located. The first guiding pipeline and the second guiding pipeline are located on the same side of the measurement pipeline. The lining pipe is nested inside the measurement pipeline; a transmitting transducer configured in the first guiding pipeline for transmitting ultrasonic waves; a receiving transducer configured in the second guiding pipeline for receiving ultrasonic waves; a reflecting member including a first reflecting member, a second reflecting member, and a third reflecting member. The first reflecting member is configured in the first guiding pipeline and is located below the transmitting probe; the second reflecting member is configured in the second guiding pipeline and is located below the receiving probe; the third reflecting member is configured in the measurement pipeline.

[0055] In this embodiment, both the transmitting probe and the receiving probe are transducers, and other sensors can also be selected according to actual situations. As Figure 2 (a) shows, the transducer is arranged perpendicular to the measurement plane on one side of the measurement pipeline. The ultrasonic waves emitted by the transducer are reflected to the measurement pipeline by the first reflecting member below the transducer, and then reflected by the reflecting sheet of the third reflecting member on the side of the measurement pipeline to the second reflecting member in the second guiding pipeline. The ultrasonic waves reflected by the second reflecting member are received by the receiving transducer. By switching the order of the transmitting transducer and the receiving transducer through a circuit, the measurement of the downstream time and the upstream time is realized, and then the real-time flow rate and the cumulative flow rate are calculated. As Figure 2As shown in (b), this arrangement can make the effective transmission distance close to that of the U-shaped reflection sound channel design without increasing the size of the meter body. Since both transducers are vertically installed in the flow channel, the machining of their mounting holes is the same as that of the U-shaped reflection sound channel. At the same time, because both the reflector and the transducers are located on the side of the measurement pipeline, it does not affect the fluid passing through, and no additional pressure loss and flow field distortion will be generated. Therefore, this three-dimensional V-shaped sound channel design combines the advantages of the conventional U-shaped and V-shaped sound channel designs, meeting multiple requirements such as taking into account the flow field quality, the size of the meter body, and reducing the processing difficulty.

[0056] Embodiment 2

[0057] Figure 3 The three-dimensional view of a three-dimensional W-shaped design of an ultrasonic measurement pipeline provided by Embodiment 2 of the present invention.

[0058] An ultrasonic measurement pipeline is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. The ultrasonic measurement pipeline includes: a pipe body, with a water inlet and a water outlet formed at both ends connected in series with the flow channel, including a measurement pipeline, a first guiding pipeline, a second guiding pipeline, and a lining pipe. The first guiding pipeline and the second guiding pipeline are located on the side of the measurement pipeline, and the first guiding pipeline and the second guiding pipeline are on the same side of the measurement pipeline, and are respectively connected to the measurement pipeline through a first through hole and a second through hole. The first through hole and the second through hole are the so-called acoustic windows in the industry. The plane where the first guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located. The lining pipe is nested inside the measurement pipeline; a transmitting probe, configured in the first guiding pipeline to transmit ultrasonic waves; a receiving probe, configured in the second guiding pipeline to receive ultrasonic waves; a reflector, including a first reflector, a second reflector, a third reflector, a fourth reflector, and a fifth reflector. The first reflector is configured in the first guiding pipeline and is located below the transmitting probe; the second reflector is configured in the second guiding pipeline and is located below the receiving probe; the third reflector and the fifth reflector are fixed to one side of the reduced diameter part of the lining pipe, and the fourth reflector is fixed to the other side of the reduced diameter part of the lining pipe. The third reflector, the fourth reflector, and the fifth reflector form a W-shaped reflection of the sound wave. The lining pipe is limited and fixed by the first reflector and the second reflector.

[0059] As shown in the figure, the three-dimensional W-shaped sound channel can further increase the effective transmission distance, but two additional reflections are required.

[0060] Embodiment 3

[0061] Figure 4 The three-dimensional view of a pair of sound channel designs of an ultrasonic measurement pipeline provided by Embodiment 3 of the present invention.

[0062] An ultrasonic measurement pipeline is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. The ultrasonic measurement pipeline includes: a pipe body, which is connected in series at both ends of the flow channel to form a water inlet and a water outlet respectively, and includes a measurement pipeline, a first guiding pipeline, a second guiding pipeline and a lining pipe. The first guiding pipeline and the second guiding pipeline are located on both sides of the measurement pipeline and are distributed in a counter-radiating manner. They penetrate through the measurement pipeline through a first perforation and a second perforation respectively. The plane where the first guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located. The lining pipe is nested inside the measurement pipeline; a transmitting probe, configured in the first guiding pipeline for transmitting ultrasonic waves; a receiving probe, configured in the second guiding pipeline for receiving ultrasonic waves; a reflecting member, including a first reflecting member and a second reflecting member. The first reflecting member is configured in the first guiding pipeline and is located below the transmitting probe; the second reflecting member is configured in the second guiding pipeline and is located below the receiving probe.

[0063] In this embodiment, both the transmitting probe and the receiving probe are transducers, and the transducers of the three-dimensional counter-radiating sound channel are arranged on both sides of the flow channel. Compared with the three-dimensional V-shaped reflection, the three-dimensional counter-radiating sound channel can reduce the primary reflection, but the transducer is arranged on both sides of the flow channel, and the body size increases.

[0064] Embodiment 4

[0065] Figure 5 It is a perspective view and a left view of a chord V-shaped design of an ultrasonic measurement pipeline provided in Embodiment 4 of the present invention. The difference between this embodiment and Embodiment 1 is that the distance between the center of the first reflecting member and the center of the transmitting probe and the distance between the center of the second reflecting member and the center of the receiving probe are different. The parts that are the same as those in Embodiment 1 will not be described in detail in this embodiment.

[0066] In this solution, the positions of the transducer and the reflecting sheet of the third reflecting member on the side of the measurement pipeline remain unchanged. The first reflecting member or the second reflecting member is moved upward, and the second reflecting member or the first reflecting member is moved downward. At the same time, the normal lines of the first reflecting member and the second reflecting member are rotated so that the reflected rays still converge at the center of the reflecting sheet inside the measurement pipeline. At this time, the measurement sound channel is in the direction of two intersecting chords of the pipeline section. Compared with the center-line sound channel arrangement, more cross-sectional flow velocity information can be measured, which helps to improve the measurement accuracy and stability.

[0067] Similarly, for the three-dimensional W-shaped sound channel and the three-dimensional counter-radiating sound channel in Embodiment 2 and Embodiment 3, the effect of measuring more cross-sectional flow velocity information can also be achieved by moving one reflecting member upward and the other reflecting member downward, so as to achieve the effect of improving the measurement accuracy and stability.

[0068] Embodiment 5

[0069] Figure 6 It is an exploded view of an ultrasonic water meter provided in Embodiment 5 of the present invention.Figure 7 This is a longitudinal sectional view of an ultrasonic water meter provided in Embodiment 5 of the present invention. The three-dimensional V-shaped measurement pipeline described in Embodiment 1 is selected in this embodiment, and the measurement pipelines described in Embodiments 2 to 4 are all applicable to the ultrasonic water meter described in this embodiment.

[0070] An ultrasonic measurement pipeline is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. The ultrasonic measurement pipeline includes: a pipe body, which forms a water inlet and a water outlet at both ends connected in series with the flow channel, and includes a measurement pipeline 1, a first guiding pipeline 2, a second guiding pipeline 3 and a lining pipe 4. The first guiding pipeline 2 and the second guiding pipeline 3 are located on the same side of the measurement pipeline 1 and are respectively communicated with the measurement pipeline 1 through a first through hole 5 and a second through hole 6. The plane where the ultrasonic emission path of the first guiding pipeline 2 is located is perpendicular to the plane where the ultrasonic measurement path in the measurement pipeline 1 is located. In the first guiding pipeline 2, the transmitting transducer 7 is cylindrical, the working surface is the front end surface, and the ultrasonic wave is vertically emitted downward from the front end surface. The first reflector 9 is inclined, and the ultrasonic wave is reflected to the reflecting sheet 11 of the third reflector through the first through hole 5, and then passes through the second through hole 6 to reach the second reflector 10. The second reflector 10 is inclined to reflect the ultrasonic wave to the receiving transducer 8. By switching the order of the transmitting transducer and the receiving transducer through a circuit, the measurement of the flight time in the forward flow direction and the reverse flow direction is realized. Similarly, the plane where the second guiding pipeline 3 is located is perpendicular to the plane where the measurement pipeline is located. The lining pipe 4 is nested inside the measurement pipeline 1 and is symmetrical at both ends. A reduced-diameter portion 4-1 is included between its inlet and outlet. The reduced-diameter portion 4-1 is used to reduce the cross-sectional area of the lining pipe 4 and improve the measurement accuracy; the longitudinal section of the reduced-diameter portion 4-1 is square or rectangular, and the four corners of the square or rectangular are arc-shaped. This shape facilitates the fixing of the reflecting sheet 11 and can also reduce a part of the pressure loss; the lining pipe is an injection molded part, and the reflecting sheet 11 of the third reflector is fixed to the side surface of the reduced-diameter portion of the lining pipe by hot melting; flow guiding sheets and a gradual change structure are provided at the inlet and outlet of the lining pipe to achieve the transition from the inlet to the reduced-diameter portion and from the reduced-diameter portion to the outlet; a sealing ring 4-2 is provided on the lining pipe to prevent the fluid from passing through the gap between the lining pipe and the measurement pipeline 1; a pressure relief hole 4-3 is also provided on the lining pipe to prevent damage to the lining pipe and the reflecting sheet 11 of the third reflector caused by too high water pressure.

[0071] The transducer 7 is located between the first transducer fixing member 12 and the inner protrusion of the first guiding pipeline 2. The first transducer fixing member 12 and the top of the first guiding pipeline 2 are fixed by bolts, and the bottom of the transducer 7 is limited by the inner protrusion of the first guiding pipeline 2; the transducer 8 is located between the second transducer fixing member 13 and the inner protrusion of the second guiding pipeline 3. The second transducer fixing member 13 and the top of the second guiding pipeline 3 are fixed by bolts.

[0072] Figure 8 Schematic diagram of a reflector inside a guiding pipe. The internal structures of the first reflector and the second reflector are the same, and only the internal structure of one reflector will be described here. The reflector includes a fixed block 9-1 and a movable block 9-2. The fixed block 9-1 is integrally cast with the guiding pipe. The movable block 9-2 and the fixed block 9-1 are jointly fixed by bolts and limit posts. The fixed block 9-1 is provided with grooves or protrusions, and correspondingly, the movable block 9-2 is provided with protrusions or grooves. The material of the movable block 9-2 is stainless steel, and the reflecting surface is a mirror surface. The movable block 9-2 is inclined. The purpose of this setting is to reflect the ultrasonic waves emitted by the transducer through the movable block 9-2 and reflect them to the reflecting sheet 11 of the third reflector through the first through hole 5, playing a guiding role. The material of the reflector can be made of stainless steel with a mirror surface, or it can be made of other materials as long as the effect of specular reflection can be achieved.

[0073] In this embodiment, the measuring pipe 1, the first guiding pipe 2, and the second guiding pipe 3 are integrally cast, simplifying the production process. A grille is provided at the water inlet or outlet of the pipe body, achieving a rectifying effect. The lining pipe 4 is limited and fixed by the first reflector 9 and the second reflector 10. During the installation process, first install the lining pipe 4, and then fix the movable blocks of the first reflector 9 and the second reflector 10 to the corresponding fixed blocks from the first guiding pipe 2 and the second guiding pipe 3.

[0074] In this embodiment, it further includes a PCB board 14. The PCB board 14 can be installed on the side of the transducer or on the top of the transducer, specifically determined by the requirements of the water meter.

[0075] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope 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. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An ultrasonic measurement pipeline is connected in series with a flow channel to measure the flow velocity of the fluid flowing through the flow channel. It is characterized in that The ultrasonic measurement pipeline includes: A pipe body, connected in series at both ends of the flow channel to form a water inlet and a water outlet respectively, including a measurement pipeline, a first guiding pipeline, and a second guiding pipeline. The first guiding pipeline and the second guiding pipeline are located on the side of the measurement pipeline and communicate with the measurement pipeline through a first perforation and a second perforation respectively. The plane where the first guiding pipeline is located is not coplanar with the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is not coplanar with the plane where the measurement pipeline is located; A transmitting probe, configured in the first guiding pipeline for transmitting ultrasonic waves; A receiving probe, configured in the second guiding pipeline for receiving ultrasonic waves; Reflection members, including a first reflection member and a second reflection member. The first reflection member is configured in the first guiding pipeline and is located below the transmitting probe; the second reflection member is configured in the second guiding pipeline and is located below the receiving probe.

2. The ultrasonic measurement pipeline according to claim 1, characterized in that, The plane where the first guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located, and the plane where the second guiding pipeline is located is perpendicular to the plane where the measurement pipeline is located.

3. The ultrasonic measurement pipeline according to claim 1, wherein The pipe body further includes a lining pipe, and the lining pipe is nested inside the measurement pipeline.

4. An ultrasonic measurement pipeline according to claim 1, characterized in that, The first guiding pipeline and the second guiding pipeline are located on the same side of the measurement pipeline.

5. The ultrasonic measurement pipeline according to claim 4, characterized in that, The reflection members further include a third reflection member, and the third reflection member is configured on the measurement pipeline.

6. The ultrasonic measurement pipeline according to claim 4, wherein The reflection members further include a third reflection member, a fourth reflection member, and a fifth reflection member, and the third reflection member, the fourth reflection member, and the fifth reflection member are respectively configured on both sides of the measurement pipeline.

7. The ultrasonic measurement pipeline according to claim 1, wherein The first guiding pipeline and the second guiding pipeline are located on both sides of the measurement pipeline.

8. An ultrasonic measurement pipeline according to claim 4 or 7, characterized in that, The distance between the center of the first reflection member and the center of the transmitting probe is different from the distance between the center of the second reflection member and the center of the receiving probe.

9. An ultrasonic measurement pipeline according to claim 1, characterized in that, The shapes of the transmitting probe and the receiving probe are cylindrical.

10. The ultrasonic measurement pipeline according to claim 3, characterized in that, Between the inlet and the outlet of the lining pipe, there is a reduced-diameter portion for reducing the cross-sectional area of the lining pipe, and both ends of the lining pipe are symmetrical.

11. An ultrasonic measurement pipeline according to claim 10, characterized in that, The longitudinal section of the reduced-diameter portion is square or rectangular, and the four corners of the square or rectangle are arc-shaped.

12. An ultrasonic measurement pipeline according to claim 5 or 11, characterized in that, The third reflection member is fixed to one side surface of the reduced-diameter portion of the lining pipe.

13. An ultrasonic measurement pipeline according to claim 6 or 11, characterized in that, The third reflection member and the fifth reflection member are fixed to one side of the reduced-diameter portion of the lining pipe, and the fourth reflection member is fixed to the other side of the reduced-diameter portion of the lining pipe.

14. The ultrasonic measurement pipeline according to claim 3, characterized in that, A sealing ring is provided in the gap between the lining pipe and the measurement pipeline between the first perforation and the second perforation.

15. A kind of ultrasonic measurement pipeline according to claim 3, characterized in that, The lining pipe is provided with a pressure relief hole.

16. The ultrasonic measurement pipeline according to claim 1, wherein The reflection surface of the first reflection member and the front end surface of the transmitting probe are distributed at an acute angle, and the reflection surface of the second reflection member and the front end surface of the receiving probe are distributed at an acute angle.

17. A kind of ultrasonic measurement pipeline according to claim 1, characterized in that, The transmitting probe is located between the transmitting probe fixing member and the inner protrusion of the first guiding pipeline, and the transmitting probe fixing member and the top of the first guiding pipeline are fixed by bolts; the receiving probe is located between the receiving probe fixing member and the inner protrusion of the second guiding pipeline, and the receiving probe fixing member and the top of the second guiding pipeline are fixed by bolts.

18. The ultrasonic measurement pipeline according to claim 1, wherein, The first reflector includes a first fixed block and a first movable block. The first fixed block is integrally cast with the first guiding pipe, and the first movable block is jointly fixed to the first fixed block by bolts and limit posts. The second reflector includes a second fixed block and a second movable block. The second fixed block is integrally cast with the second guiding pipe, and the second movable block is jointly fixed to the second fixed block by bolts and limit posts.

19. An ultrasonic measurement pipeline according to claim 1, 5 or 6, characterized in that, The first reflector, the second reflector, the third reflector, the fourth reflector, and the fifth reflector are made of stainless steel, and the reflecting surface is a mirror surface.

20. A kind of ultrasonic measurement pipeline according to claim 1, characterized in that, The measuring pipe, the first guiding pipe, and the second guiding pipe are integrally cast.

21. A kind of ultrasonic measurement pipeline according to claim 1, characterized in that, A grille is provided at the water inlet or the water outlet of the pipe body.

22. The ultrasonic measurement pipeline according to claim 3, wherein, The inner lining pipe is limited and fixed by the first reflector and the second reflector.

23. A kind of ultrasonic measurement pipeline according to claim 13, characterized in that, The third reflector, the fourth reflector, and the fifth reflector are heat-melt fixed to the inner lining pipe.

24. An ultrasonic water meter, characterized in that, It includes an ultrasonic measuring pipeline according to any one of claims 1 to 23.

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