Fluid metering device and fluid conveying system

Abstract

The utility model provides a fluid metering device and a fluid conveying system.The fluid metering device comprises a first signal pipe and a second signal pipe which are arranged on the side wall of a to-be-measured flow channel, and transducers are arranged at the ends, away from the to-be-measured flow channel, of the first signal pipe and the second signal pipe correspondingly; the transducers arranged in the first signal pipe and the second signal pipe are used for exchanging ultrasonic signals through the to-be-measured flow channel, the first signal pipe and the second signal pipe are communicated with the to-be-measured flow channel, and the first signal pipe and / or the second signal pipe are / is reducer pipes. By applying the reducer pipe to the to-be-measured flow channel, the disturbance of the signal pipe to the flow field distribution in the to-be-measured flow channel can be effectively reduced, the interference factors of ultrasonic propagation in fluid are reduced, and the final measurement precision is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of fluid metering, and in particular to a fluid metering device and a fluid delivery system. Background Art

[0002] Ultrasonic flowmeters are now widely used in various fields. Compared with traditional flowmeters, they have no moving parts, no obstructions in the pipeline, a wide measurement range, and high repeatability. Ultrasonic flowmeters use multiple pairs of transducers placed in the pipeline, allowing ultrasonic waves to interact with the fluid medium in the pipeline and thereby measure the flow rate of the fluid in the pipeline.

[0003] Existing ultrasonic flowmeters typically feature a signal tube directly connected to the pipeline to facilitate smooth interaction between sound waves and the fluid in the pipeline. This allows the ultrasonic waves emitted by the transducer within the signal tube to interact directly with the fluid without being blocked by the pipe wall.

[0004] Due to the unreasonable shape setting of the signal tube in the existing ultrasonic flowmeter, the flow field is easily distorted at the connection point between the signal tube and the pipeline, thereby affecting the final measurement result. Utility Model Content

[0005] The purpose of this application is to provide a fluid metering device and a fluid delivery system to address the deficiencies in the above-mentioned prior art.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0007] In one aspect of an embodiment of the present application, a fluid metering device is provided, comprising a first signal tube and a second signal tube arranged on the side wall of a flow channel to be measured, wherein a transducer is respectively provided at an end of the first signal tube and the second signal tube away from the flow channel to be measured, the transducers provided in the first signal tube and the second signal tube are used to exchange ultrasonic signals through the flow channel to be measured, the first signal tube and the second signal tube are respectively connected to the flow channel to be measured, and the first signal tube and / or the second signal tube are reducing tubes.

[0008] Optionally, the direction from the end of the reducer away from the flow channel to be measured toward the end of the reducer close to the flow channel to be measured is a first direction, and the diameter of the reducer gradually increases along the first direction.

[0009] Optionally, the direction from the end of the reducer away from the flow channel to be measured toward the end of the reducer close to the flow channel to be measured is a first direction, and the diameter of the reducer gradually decreases along the first direction.

[0010] Optionally, the reducer has a tapered section passing through the central axis of the reducer, and a generatrix of the tapered section is composed of at least one of a straight line, a curve, and a broken line.

[0011] Optionally, the radial cross-section of the reducer includes at least one of a polygon, a circle or an ellipse.

[0012] Optionally, the first signal tube and the second signal tube are arranged at intervals along the flow direction of the fluid in the flow channel to be measured.

[0013] Optionally, the first signal tube and the second signal tube are distributed on the same side of the flow channel to be measured.

[0014] Optionally, the first signal tube and the second signal tube are distributed on opposite sides of the flow channel to be measured.

[0015] Optionally, the fluid metering device further includes a processor located outside the flow channel to be measured, and the processor is electrically connected to the transducers in the first signal tube and the second signal tube respectively.

[0016] Another aspect of an embodiment of the present application provides a fluid delivery system, comprising a flow channel to be tested for delivering fluid and any one of the above-mentioned fluid metering devices, wherein the fluid metering device is used to measure flow information of the fluid in the flow channel to be tested.

[0017] The beneficial effects of this application include:

[0018] The present application provides a fluid metering device and a fluid delivery system, comprising a first signal tube and a second signal tube disposed on the side wall of a flow channel to be measured, wherein a transducer is respectively disposed at an end of the first signal tube and the second signal tube away from the flow channel to be measured, the transducers disposed in the first signal tube and the second signal tube are used to exchange ultrasonic signals through the flow channel to be measured, the first signal tube and the second signal tube are respectively connected to the flow channel to be measured, and the first signal tube and / or the second signal tube are reducers. By applying the reducer to the flow channel to be measured, the disturbance caused by the signal tube to the flow field distribution in the flow channel to be measured can be effectively reduced, the interference factors of ultrasonic wave propagation in the fluid can be reduced, and the final measurement accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of a fluid metering device provided in an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the impact of existing ultrasonic flowmeters on the flow field distribution in pipelines during actual use;

[0022] Figure 3A schematic diagram illustrating the effect of a fluid metering device provided in an embodiment of the present application on the flow field distribution in a pipeline during actual use;

[0023] Figure 4 Schematic diagram of acoustic performance of an existing ultrasonic flow meter and the fluid metering device of the present application;

[0024] Figure 5 This is a second structural diagram of a fluid metering device provided in an embodiment of the present application;

[0025] Figure 6 This is one of the partial enlarged views of a fluid metering device provided in an embodiment of the present application;

[0026] Figure 7 A second partially enlarged view of a fluid metering device provided in an embodiment of the present application;

[0027] Figure 8 A third partially enlarged view of a fluid metering device provided in an embodiment of the present application;

[0028] Figure 9 A fourth partially enlarged view of a fluid metering device provided in an embodiment of the present application;

[0029] Figure 10 A fifth partial enlarged view of a fluid metering device provided in an embodiment of the present application;

[0030] Figure 11 This is the sixth partial enlarged view of a fluid metering device provided in an embodiment of the present application.

[0031] Icons: 01-pipeline; 02-cylindrical tube; 110-flow channel to be measured; 111-fluid flow direction; 120-first signal tube; 121-busbar; 130-second signal tube; 140-transducer; 141-ultrasonic wave; 160-first direction. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0038] In one aspect of the embodiment of the present application, a fluid metering device is provided, such as Figure 1 As shown, the fluid metering device includes a first signal tube 120 , a second signal tube 130 , and transducers 140 respectively disposed in the first signal tube 120 and the second signal tube 130 .

[0039] For the convenience of describing the fluid metering device, please refer to Figure 1The flow channel 110 to be measured will be introduced below to describe the relative positions of the first signal tube 120 , the second signal tube 130 , and the transducers 140 respectively provided in the first signal tube 120 and the second signal tube 130 .

[0040] like Figure 1 As shown, the first signal tube 120 and the second signal tube 130 are both disposed on the sidewall of the flow channel 110 to be measured, so as to provide a reasonable installation location for the transducer 140. In other words, the installation location of the first signal tube 120 and the second signal tube 130 on the sidewall of the flow channel 110 to be measured should be determined based on the required position of the transducer 140.

[0041] like Figure 1 As shown, the end of the first signal tube 120 and the second signal tube 130 away from the flow channel 110 to be measured can be used as the installation position of the transducer 140. Then, the transducer 140 is installed at the installation position in the first signal tube 120, and the transducer 140 is installed at the installation position in the second signal tube 130. In this way, it is convenient for the transducer 140 in the first signal tube 120 to emit or receive ultrasonic waves 141 along the axial direction of the first signal tube 120. Similarly, it is convenient for the transducer 140 in the second signal tube 130 to emit or receive ultrasonic waves 141 along the axial direction of the second signal tube 130. It should be understood that the transducer 140 can adopt a mature device structure in the art, as long as it can emit or receive ultrasonic waves 141 accordingly.

[0042] Continue to refer to Figure 1 The first signal tube 120 and the second signal tube 130 are respectively connected to the flow channel 110 at one end close to the flow channel 110 to be measured. In this way, after the transducer 140 emits the ultrasonic wave 141, it will not be blocked by the side wall of the flow channel 110 to be measured, but will directly interact with the fluid in the flow channel 110 to be measured, thereby measuring the flow rate of the fluid in the flow channel 110 to be measured.

[0043] For ease of understanding, the following is the measurement principle of the fluid metering device: Please refer to Figure 1The transducers 140 in the first signal tube 120 and the second signal tube 130 form a pair of transducers 140. Furthermore, the transducers 140 in the first signal tube 120 and the second signal tube 130 are located on the same ultrasonic wave propagation path. In the downstream state, the transducer 140 in the first signal tube 120 transmits ultrasonic wave 141 to the transducer 140 in the second signal tube 130. In the upstream state, the transducer 140 in the second signal tube 130 transmits ultrasonic wave 141 to the transducer 140 in the first signal tube 120. The velocity difference generated by the transmission of ultrasonic wave 141 in the downstream and upstream states reflects the change in flow velocity. The fluid flow rate is calculated based on the flight time of ultrasonic wave 141 between the two transducers 140 and the flight time difference. Of course, in other examples, in the downstream state, the transducer 140 in the second signal tube 130 transmits ultrasonic wave 141 to the transducer 140 in the first signal tube 120. In the countercurrent state, the transducer 140 in the first signal tube 120 transmits ultrasonic waves 141 to the transducer 140 in the second signal tube 130 . The principles are the same and will not be described in detail.

[0044] Please refer to Figure 1 , at least one of the first signal tube 120 and the second signal tube 130 is a reducer. That is, if the first signal tube 120 is a reducer, the diameter of the first signal tube 120 will change along the axial direction of the first signal tube 120. Similarly, if the second signal tube 130 is a reducer, the diameter of the second signal tube 130 will change along the axial direction of the second signal tube 130. Similarly, if both the first signal tube 120 and the second signal tube 130 are reducers, the diameter of the first signal tube 120 will change along the axial direction of the first signal tube 120, and the diameter of the second signal tube 130 will change along the axial direction of the second signal tube 130. In this way, by applying a reducer to the flow channel 110 to be measured, the disturbance caused by the signal tube to the flow field distribution in the flow channel 110 to be measured can be effectively reduced, the interference factors of ultrasonic wave propagation in the fluid can be reduced, and the final measurement accuracy can be improved.

[0045] In order to better understand the technical effects that can be achieved by the technical solution of this application, Figure 2 and Figure 3 For comparison:

[0046] like Figure 2 As shown, it shows the influence of the existing ultrasonic flowmeter on the flow field distribution in the pipeline 01 in actual use. Among them, the signal tube of the existing ultrasonic flowmeter is a cylindrical tube 02, the diameter of the cylindrical tube 02 along the axial direction is equal, and the cylindrical tube 02 is directly connected to the pipeline 01. Figure 2As can be seen, when the fluid in pipeline 01 flows along fluid flow direction 111, a significant backflow phenomenon occurs at the connection point between cylindrical tube 02 and pipeline 01, and the flow field is significantly disturbed at the connection point between cylindrical tube 02 and pipeline 01. These phenomena affect the propagation of ultrasonic waves in the fluid, thereby affecting the final measurement accuracy.

[0047] In contrast, Figure 3 As shown, it shows the influence of the first signal tube 120 and the second signal tube 130 of the fluid metering device of the present application on the flow field distribution in the flow channel 110 to be measured in actual use. Among them, the first signal tube 120 and the second signal tube 130 are both reducers, the diameter of the reducer will change along the axial direction, and the reducer is directly connected to the pipeline 01. Figure 3 It can be seen that when the fluid in the flow channel 110 to be measured flows along the fluid flow direction 111, there is almost no backflow phenomenon at the connection point between the reducer and the flow channel 110 to be measured, and the flow field is almost not disturbed at the connection point between the reducer and the flow channel 110 to be measured. This shows that the reducer plays an important role in stabilizing the flow field. Therefore, by using the reducer, the backflow phenomenon can be improved and the disturbance of the flow field can be reduced, thereby effectively reducing the interference factors of ultrasonic wave propagation in the fluid and improving the final measurement accuracy.

[0048] On this basis, after the fluid metering device of the present application adopts a reducer, the reducer can also be used to regulate the acoustic coupling between the transducer 140 and the fluid medium in the flow channel 110 to be measured, so as to achieve the function of controlling the final acoustic performance. Figure 4 , respectively showing the acoustic performance of the existing ultrasonic flow meter and the fluid metering device of the present application. Figure 4 As can be seen, the use of a variable diameter tube in this application can effectively reduce the sound field angle and increase the sound intensity compared to the existing cylindrical tube 02. Thus, the use of a variable diameter tube in this application can reduce dependence on external circuits, achieve greater sound intensity with a lower drive voltage, and reduce power consumption. Furthermore, this application can simultaneously increase sound intensity and change beam width by varying the angle and depth, enabling a single transducer 140 to achieve the effect of an array, saving device design time and process costs. Furthermore, the technical solution of this application has universal applicability.

[0049] Alternatively, see Figure 1 or Figure 5The first signal tube 120 and the second signal tube 130 are arranged at intervals along the fluid flow direction 111 in the flow channel 110 to be measured. In this way, the first signal tube 120 and the second signal tube 130 can be distributed upstream and downstream of the fluid, and the fluid flow rate can be measured by utilizing the aforementioned interaction between ultrasound and the fluid. To better understand the technical solution of this application, the distribution positions of the first signal tube 120 and the second signal tube 130 will be described below by way of example.

[0050] In example one:

[0051] like Figure 1 As shown, the first signal tube 120 and the second signal tube 130 are located on the same side of the flow channel 110 to be measured. For example, the first signal tube 120 and the second signal tube 130 are located on the upper side of the flow channel 110 to be measured. After the transducer 140 in the first signal tube 120 emits an ultrasonic wave 141, the ultrasonic wave 141 enters the fluid, is then reflected by the wall on the lower side of the flow channel 110 to be measured, and is received by the transducer 140 in the second signal tube 130. Similarly, after the transducer 140 in the second signal tube 130 emits an ultrasonic wave 141, the ultrasonic wave 141 enters the fluid, is then reflected by the wall on the lower side of the flow channel 110 to be measured, and is received by the transducer 140 in the first signal tube 120.

[0052] In example two:

[0053] like Figure 5 As shown, the first signal tube 120 and the second signal tube 130 are located on opposite sides of the flow channel 110 to be tested. For example, the first signal tube 120 is located on the upper side of the flow channel 110 to be tested, and the second signal tube 130 is located on the lower side of the flow channel 110 to be tested. After the transducer 140 in the first signal tube 120 emits an ultrasonic wave 141, the ultrasonic wave 141 enters the fluid and is then received by the transducer 140 in the second signal tube 130. Similarly, after the transducer 140 in the second signal tube 130 emits an ultrasonic wave 141, the ultrasonic wave 141 enters the fluid and is then received by the transducer 140 in the first signal tube 120.

[0054] Of course, in other examples not shown in the present application, the positions of the first signal tube 120 and the second signal tube 130 can also adopt other settings besides the above examples one and two, and the present application does not limit it, as long as the transducers 140 in the first signal tube 120 and the second signal tube 130 are in the same ultrasonic propagation path.

[0055] In some possible implementations, the direction from the end of the reducer away from the flow channel to be measured 110 toward the end of the reducer close to the flow channel to be measured 110 is the first direction 160. Figure 6 As shown, the diameter of the reducer gradually increases along the first direction 160. Alternatively, as shown Figure 7As shown, the diameter of the reducer gradually decreases along the first direction 160 .

[0056] In some possible implementations, the reducer has a tapered section passing through the central axis of the reducer, and the generatrix 121 of the tapered section is composed of at least one of a straight line, a curve, and a broken line. Specifically: for example Figure 6 and Figure 7 As shown, the two generatrixes 121 of the conical section are straight lines; for example Figure 8 As shown, the two generatrixes 121 of the conical section are curves, which include but are not limited to circular arcs, elliptical arcs, etc.; Figure 9 As shown, the two generatrixes 121 of the conical section are broken lines; for example Figure 10 As shown, each generatrix 121 of the conical section is composed of a straight line and a curve, and one end point of the straight line is connected to one end point of the curve; for example Figure 11 As shown, the line types of the two generatrixes 121 of the tapered cross section are different. For example, one generatrix 121 is a straight line, while the other generatrix 121 is a curve.

[0057] Optionally, the radial cross-section of the reducer includes at least one of a polygonal, circular, or elliptical shape. For example, when the reducer is a prismatic tube, its radial cross-section is polygonal; and for another example, when the reducer is a conical or truncated cone tube, its radial cross-section is circular.

[0058] Optionally, the fluid metering device further includes a processor located outside the flow channel 110 to be measured, the processor being electrically connected to the transducers 140 in the first signal tube 120 and the second signal tube 130, respectively. Thus, when the flow rate of the fluid in the flow channel 110 to be measured is to be measured, the processor can control the transducer 140 in the first signal tube 120 to transmit an ultrasonic wave 141 to the transducer 140 in the second signal tube 130. Upon receiving the ultrasonic wave 141, the transducer 140 in the second signal tube 130 converts the ultrasonic wave 141 into an electrical signal, which is then analyzed and processed by the processor. The processor then controls the transducer 140 in the second signal tube 130 to transmit the ultrasonic wave 141 to the transducer 140 in the first signal tube 120. Similarly, upon receiving the ultrasonic wave 141, the transducer 140 in the first signal tube 120 converts the ultrasonic wave 141 into an electrical signal, which is then analyzed and processed by the processor. Finally, the processor processes the two electrical signals to determine the fluid flow rate.

[0059] Another aspect of an embodiment of the present application provides a fluid delivery system, including a flow channel 110 to be tested for delivering fluid and any of the above-mentioned fluid metering devices, wherein the fluid metering device is used to measure flow information of the fluid in the flow channel 110 to be tested.

[0060] By applying the aforementioned fluid metering device to a fluid delivery system, the final measurement accuracy can be improved. Furthermore, the fluid metering device of the present application can reduce dependence on external circuitry, achieving greater sound intensity with a smaller drive voltage, thereby reducing power consumption. Furthermore, the fluid metering device of the present application can simultaneously increase sound intensity and change beam width by varying the angle and depth, enabling a single transducer 140 to achieve the effect of an array, saving device design time and process costs.

[0061] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fluid metering device, characterized in that: It includes a first signal tube and a second signal tube arranged on the side wall of the flow channel to be measured, and a transducer is respectively provided at the end of the first signal tube and the second signal tube away from the flow channel to be measured. The transducers arranged in the first signal tube and the second signal tube are used to exchange ultrasonic signals through the flow channel to be measured. The first signal tube and the second signal tube are respectively connected to the flow channel to be measured, and the first signal tube and / or the second signal tube are reducing tubes.

2. The fluid metering device according to claim 1, wherein: The direction from the end of the reducer away from the flow channel to be measured toward the end of the reducer close to the flow channel to be measured is a first direction, and the diameter of the reducer gradually increases along the first direction.

3. The fluid metering device according to claim 1, wherein: The direction from the end of the reducer away from the flow channel to be measured toward the end of the reducer close to the flow channel to be measured is a first direction, and the diameter of the reducer gradually decreases along the first direction.

4. The fluid metering device according to any one of claims 1 to 3, characterized in that: The reducer has a tapered section passing through the central axis of the reducer, and a generatrix of the tapered section is composed of at least one of a straight line, a curve, and a broken line.

5. The fluid metering device according to any one of claims 1 to 3, characterized in that: The radial cross-section of the reducer includes at least one of a polygon, a circle or an ellipse.

6. The fluid metering device according to any one of claims 1 to 3, characterized in that: The first signal tube and the second signal tube are arranged at intervals along the flow direction of the fluid in the flow channel to be measured.

7. The fluid metering device according to claim 6, wherein: The first signal tube and the second signal tube are distributed on the same side of the flow channel to be measured.

8. The fluid metering device according to claim 6, wherein: The first signal tube and the second signal tube are distributed on opposite sides of the flow channel to be measured.

9. The fluid metering device according to claim 1, wherein: The fluid metering device further includes a processor located outside the flow channel to be measured, and the processor is electrically connected to the transducers in the first signal tube and the second signal tube respectively.

10. A fluid delivery system, characterized in that: It comprises a flow channel to be measured for conveying fluid and a fluid metering device according to any one of claims 1 to 9, wherein the fluid metering device is used to measure flow information of the fluid in the flow channel to be measured.

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