Four-channel ultrasonic metering pipe section

Abstract

The utility model relates to the field of ultrasonic metering detection, in particular to an ultrasonic metering pipe section. The transducer mainly comprises a metering pipe section and a transducer fixed on the metering pipe section, and is characterized by further comprising a fixing assembly connected to the metering pipe section, four assembling positions which are arranged in parallel are arranged on the fixing assembly, and each assembling position comprises two assembling holes which are symmetrically distributed; the transducer is mounted in the assembly hole; a space sound channel is formed between the two transducers mounted on each assembly position; and the four space sound channels are symmetrically distributed in pairs and are parallel to each other about the horizontal section of the metering pipe section along the axial direction. By arranging the four groups of ultrasonic space sound channels which are parallel to one another and combining the specific installation positions of the ultrasonic transducers, even if the ultrasonic transducers break down, it can be guaranteed that ultrasonic signals cannot interfere with one another, and it can be guaranteed that the ultrasonic metering pipe section has good metering accuracy and reliability under various use working conditions.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic measurement and detection, in particular to an ultrasonic measurement pipe section. Background Art

[0002] The ultrasonic metering pipe section is a new type of metering device that detects the time difference caused by the change in speed when the ultrasonic sound beam propagates in the fluid downstream or upstream, analyzes and processes the flow rate of the fluid, and further calculates the flow rate of the fluid. It mainly consists of a metering pipe connected to the fluid delivery pipeline and an ultrasonic transducer on it. Two ultrasonic transducers installed in the upstream and downstream symmetrical positions of the pipeline send and receive ultrasonic signals alternately. At one moment, the upstream ultrasonic transducer transmits ultrasonic signals, and the downstream ultrasonic transducer receives ultrasonic signals; at another moment, the downstream ultrasonic transducer transmits ultrasonic signals, and the upstream ultrasonic transducer receives ultrasonic signals. The flow rate of the fluid is indirectly measured by measuring the time difference of ultrasonic waves propagating downstream or upstream in the medium, and the flow rate is indirectly measured by combining the cross-sectional parameters of the pipeline.

[0003] In conventional applications, for metering pipes with smaller diameters, a set of transducer devices are usually installed opposite to each other, that is, two transducers responsible for sending and receiving respectively. However, for metering pipes with larger diameters, a set of transducers often cannot accurately complete the metering task, and it cannot reflect all the information of the flow field in the pipe. It is necessary to install multiple sets of transducers to form a multi-channel metering form to increase the accuracy of the metering. For example, the Chinese patent document with publication number CN114543950 A discloses an orthogonal measurement method based on a multi-channel ultrasonic water meter and a multi-channel ultrasonic water meter, wherein the multi-channel ultrasonic water meter mainly includes a case and a transducer mounting frame, and the case is provided with two pairs of transducer mounting holes with perpendicular channel angles, equal channel distances, and symmetrical about the central axis of the case. The transducer is installed inside the transducer mounting hole, so that the transmission directions of the ultrasonic signals in the two channels formed are perpendicular to each other. It improves the accuracy of the metering to a certain extent.

[0004] The two channels of the above-mentioned multi-channel ultrasonic water meter are perpendicular to each other, so there is a spatial transmission intersection of the ultrasonic signal. When the ultrasonic transducer fails and causes the transmission time periods of the two channel signals to overlap, the ultrasonic signals in the two channels will overlap, causing interference, which seriously affects the measurement accuracy of the ultrasonic water meter. Utility Model Content

[0005] The purpose of the utility model is to provide a four-channel ultrasonic metering pipe section, which, by setting four sets of ultrasonic spatial channels parallel to each other and combining with the specific installation position of the ultrasonic transducer, can ensure that the ultrasonic signals will not interfere with each other even if the ultrasonic transducer fails, and can ensure that the ultrasonic metering pipe section has good metering accuracy and reliability under various operating conditions.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A four-channel ultrasonic metering pipe segment comprises a metering pipe segment and a transducer fixed on the metering pipe segment, characterized in that it also comprises a fixing component connected to the metering pipe segment, the fixing component is provided with four parallelly arranged assembly positions, each of the assembly positions comprises two symmetrically distributed assembly holes; the transducer is installed in the assembly hole; a spatial sound channel is formed between the two transducers installed on each of the assembly positions; the four spatial sound channels are symmetrically distributed in pairs with respect to the horizontal section of the metering pipe segment along the axial direction and are parallel to each other; the distance between the two spatial sound channels on any side of the horizontal section of the metering pipe segment along the axial direction and the horizontal section of the metering pipe segment along the axial direction accounts for 30% to 70% of the radius of the cross-sectional area of ​​the metering pipe segment.

[0008] Thus, the metering pipe section is directly connected to the fluid delivery pipeline. When the fluid flows through the metering pipe, the transducer installed thereon will send and receive ultrasonic signals and calculate the fluid flow rate through the flight time. This metering pipe section can be used in fields such as water flow measurement.

[0009] A fixing component is provided on the metering pipe section, which is used to fix the transducer on the metering pipe section in a specific arrangement direction and spacing. Each fixing component is provided with four parallel and spaced assembly positions, and each assembly position is composed of two symmetrically distributed assembly holes, and the transducer is installed in the assembly hole. A spatial sound channel for ultrasonic signal transmission is formed between the two transducers in each assembly position, and the four spatial sound channels are parallel to each other and have a certain interval. There is a horizontal section along the axial direction on the metering pipe section, and the four spatial sound channels are distributed parallel to the horizontal section along the axial direction. The distribution height of the four spatial sound channels is related to the cross-sectional radius of the metering pipe section.

[0010] It can be seen from the water flow test data that under different pipeline flow rates, the spatial sound channels at different height distribution positions have different detection results for flow data. Therefore, in order to ensure that the transducers of the four spatial sound channels can all work consistently, it is necessary to set a suitable distribution position. Specifically, two spatial sound channels are arranged on both sides of the horizontal section along the axial direction on the metering pipe section. They are symmetrically distributed about the horizontal section, so the vertical distance of the two mutually symmetrical spatial sound channels from the horizontal section accounts for the same ratio of the radius. As can be seen from the figure, under different flow tests, when the distance between the four spatial sound channels and the above-mentioned horizontal section accounts for 30%~70% of the radius of the cross-section of the metering pipe section, the consistency of the metering data is the highest. The accuracy of the four sound channels when working normally can be guaranteed.

[0011] As a preferred embodiment of the present invention, the distance between the two spatial sound channels on any side of the horizontal section of the metering pipe segment along the axial direction and the horizontal section of the metering pipe segment along the axial direction respectively occupies 35% and 65% of the cross-sectional radius of the metering pipe segment.

[0012] As a preferred embodiment of the present invention, the four-channel ultrasonic metering pipe section further includes a threading tube connected to the fixing component, the threading tube includes a hollow inner cavity, and the hollow inner cavity is connected to the assembly hole.

[0013] As a preferred embodiment of the utility model, a meter head fixing component connected to the threading pipe is provided on the metering pipe section, and the meter head fixing component is used to provide an installation position for the meter head.

[0014] As a preferred embodiment of the present invention, the metering pipe section includes a main pipe section and a flange for fixed connection with other water delivery pipe sections.

[0015] As a preferred embodiment of the present invention, a side wall of the main pipe section is provided with a receiving hole for allowing the front end of the transducer to protrude, and the receiving hole is arranged corresponding to the assembly hole.

[0016] As a preferred embodiment of the present invention, the angle between the spatial sound channel and the extending direction of the metering pipe section is 45°~60°.

[0017] As a preferred embodiment of the utility model, the transducer is provided with an external thread, and the assembly hole is provided with an internal thread matching the external thread provided on the transducer.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. By setting the appropriate spatial channel distribution position, the consistency of the four channel measurement data can be maximized, which can ensure the highest accuracy of the entire ultrasonic metering pipe section during normal operation.

[0020] 2. By providing a threading tube whose hollow inner cavity is connected to the assembly hole, multiple connection cables of eight transducers can be stored in the threading tube. The threading tube is connected to the meter head fixing component to avoid exposure of the cables connected to the meter head, thereby achieving the purpose of protection.

[0021] 3. The distances between the two spatial sound channels on any side of the horizontal section of the metering pipe section along the axial direction and the horizontal section of the metering pipe section along the axial direction are 35% and 65% of the cross-sectional radius of the metering pipe section 1, respectively, which can ensure the metering consistency of the four spatial channels, thereby enhancing the data reliability of the entire ultrasonic metering pipe section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the four-channel ultrasonic metering pipe section;

[0023] Figure 2 is a schematic cross-sectional view of the four-channel ultrasonic metering pipe section;

[0024] Figure 3 is a vertical cross-sectional schematic diagram of the four-channel ultrasonic metering pipe section;

[0025] Figure 4 is a top view of the four-channel ultrasonic metering pipe section;

[0026] Figure 5 Table A is the test data;

[0027] Figure 6 is the test data table B;

[0028] Figure 7 Table C is the test data table;

[0029] Figure 8 Take a plot of the results for the medium flow test;

[0030] Fig. 9 Take a point result graph for high flow test;

[0031] Fig.10 Take a graph of the results for the low flow test.

[0032] In the figure: metering pipe section 1, main pipe section 11, flange 12, accommodating hole 13, transducer 2, fixing component 3, assembly position 4, assembly hole 41, threading tube 5, meter head fixing component 6. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0034] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0035] Depend on Figure 1 As shown, the metering pipe section 1 is directly connected to the fluid delivery pipeline. When the fluid flows through the metering pipe 1, the transducer 2 installed thereon will send and receive ultrasonic signals and calculate the fluid flow rate through the flight time. This metering pipe section can be used in fields such as water flow measurement.

[0036] Depend on Figure 2 and Figure 3 As shown, a fixing component 3 is provided on the main section 11 of the metering pipe section 1. The fixing component 3 is used to fix the transducer 2 on the metering pipe section 1 in a specific arrangement direction and spacing. Each fixing component 3 is provided with four parallel and spaced assembly positions 4, and each assembly position 4 is composed of two symmetrically distributed assembly holes 41, and the transducer 2 is installed in the assembly hole 41. A spatial sound channel for ultrasonic signal transmission is formed between the two transducers 2 in each assembly position 4, and the four spatial sound channels are parallel to each other and have a certain interval. There is a horizontal section along the axial direction on the metering pipe section 1, and the four spatial sound channels are distributed parallel to the horizontal section along the axial direction. The distribution height of the four spatial sound channels is related to the cross-sectional radius of the metering pipe section 1.

[0037] The fixing assembly 3 is connected with a threading tube 5, which has a hollow inner cavity and is connected to the receiving hole 13 on the main pipe section 11, and is used to collect the cables at the tail of the transducer 2. The threading tube 5 is connected to the meter head fixing assembly 6, and the cables can be introduced into the meter head of the electric meter. The main pipe section 11 is also provided with a flange 12 for fixed connection with other water delivery pipe sections; the side wall of the main pipe section 11 is provided with a receiving hole 13 for the front end of the transducer 2 to protrude. The transducer 2 is provided with an external thread, and the assembly hole 41 is provided with an internal thread that matches the external thread provided on the transducer 2.

[0038] Depend on Figure 4 As shown, the angle between the spatial sound channel and the extending direction of the metering tube section 1 is 55°, thereby ensuring that there is a certain distance between the two relative transducers 2 to enhance the propagation distance of the ultrasonic signal and increase the metering accuracy to a certain extent.

[0039] Depend on Figure 5 , Figure 6 and Figure 7The test data table ABC shown in the figure can be obtained. The bottom of the measuring pipe section 1 is designed as the origin of the height coordinate. A test experiment with a continuous value of 100 is established. Multiple groups of tests of medium flow / large flow and small flow are carried out respectively to check the flow detection data when the spatial sound channel is located at different height positions. The following is obtained: Figure 8 , Fig. 9 and Fig.10 The point selection result diagram shown in the figure shows that when the distance between the four spatial sound channels and the above-mentioned horizontal section accounts for 30% to 70% of the cross-sectional radius of the metering pipe section 1, the consistency of the metering data is the highest, which can ensure the accuracy of the four sound channels when they are working normally.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A four-channel ultrasonic metering pipe segment, comprising a metering pipe segment (1) and a transducer (2) fixed on the metering pipe segment (1), characterized in that: The invention also comprises a fixing component (3) connected to the metering pipe section (1), wherein the fixing component (3) is provided with four parallelly arranged assembly positions (4), and each assembly position (4) comprises two symmetrically distributed assembly holes (41); the transducer (2) is installed in the assembly hole (41); a spatial sound channel is formed between the two transducers (2) installed on each assembly position (4); the distance between the two spatial sound channels on either side of the horizontal section of the metering pipe section (1) along the axial direction and the horizontal section of the metering pipe section (1) along the axial direction respectively accounts for 35% and 65% of the radius of the cross section of the metering pipe section (1); and the angle between the spatial sound channel and the extension direction of the metering pipe section (1) is 55°.

2. A four-channel ultrasonic measuring pipe section according to claim 1, characterized in that: The four-channel ultrasonic measuring pipe section also includes a threading tube (5) connected to the fixing component (3), wherein the threading tube (5) includes a hollow inner cavity, and the hollow inner cavity is connected to the assembly hole (41).

3. A four-channel ultrasonic measuring pipe section according to claim 2, characterized in that: The metering pipe section (1) is provided with a meter head fixing component (6) connected to the threading pipe (5), and the meter head fixing component (6) is used to provide an installation position for the meter head of the electric meter.

4. A four-channel ultrasonic measuring pipe section according to claim 1, characterized in that: The metering pipe section (1) comprises a main pipe section (11) and a flange (12) for fixed connection with other water delivery pipe sections.

5. A four-channel ultrasonic measuring pipe section according to claim 4, characterized in that: The side wall of the main pipe section (11) is provided with a receiving hole (13) for allowing the front end of the transducer (2) to protrude, and the receiving hole (13) is arranged corresponding to the assembly hole (41).

6. A four-channel ultrasonic measuring pipe section according to claim 1, characterized in that: The transducer (2) is provided with an external thread, and the assembly hole (41) is provided with an internal thread that matches the external thread provided on the transducer (2).

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