Ultrasonic water meter turbulent flow test pipeline tool and test method

Abstract

The invention provides an ultrasonic water meter turbulent flow test pipeline tool which comprises a fluid pipeline, an internal turbulent flow structure and a bubble generation structure are arranged in the fluid pipeline, the internal turbulent flow structure comprises a spiral vortex generation piece and a plurality of turbulent flow pieces, the spiral vortex generation piece is located at the initial section of a flow field of the pipeline, and the turbulent flow pieces are located in the pipeline. The spiral vortex generating piece is provided with a plurality of ridge-shaped structures, the spoiler is located at the tail section of the fluid pipeline, the bubble generating structure comprises a plurality of central gas injection holes and a plurality of circumferential gas injection holes, the central gas injection holes are formed in the starting position of the spiral vortex generating piece, and the circumferential gas injection holes are formed in the tail section of the fluid pipeline. The circumferential gas injection hole is formed in the fluid pipeline at the starting position of the spiral vortex generating piece, the spoilers are evenly distributed on the inner wall of the fluid pipeline, and the central gas injection hole and the circumferential gas injection hole are communicated with a gas source. An internal turbulent flow structure and a bubble generation structure are adopted to simulate the water flow condition simultaneously containing bubbles and vortexes in a water flow field.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic water meter disturbance flow test pipe section tooling, in particular to an ultrasonic water meter disturbance flow test pipe section tooling containing a bubble and vortex generating structure. Background Art

[0002] As an important measuring instrument for measuring water flow, water meter’s measuring accuracy, measuring range, reliability, lifespan, function and manufacturing cost are all related to water metering and water fee settlement, and it has practical value in controlling water consumption, saving water and managing water consumption. Different types of water meters need different testing equipment to simulate user usage, special situations and extreme situations that may potentially affect the accuracy of water meters during the research and development and production sampling process, so that the water meters can meet the required accuracy and be used for a long time under various environmental conditions.

[0003] Among the many factors that affect the accuracy error of water meter flow, the most influential and sensitive one is the vortex disturbance of water flow. The most sensitive influence on the accuracy of ultrasonic water meter is the situation where there are bubbles in the water. Therefore, a test pipeline tool is needed to simulate the distribution of bubbles in the flow field, as well as the extreme situation of containing both bubbles and vortices. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an ultrasonic water meter disturbance flow test pipeline tooling, which adopts an internal disturbance flow structure and a bubble generating structure to simulate the water flow condition containing both bubbles and vortices in the water flow field, and provides conditions for testing the flow accuracy of the ultrasonic water meter under the condition of uneven distribution of bubble density and size in the vortex flow field.

[0005] The specific technical scheme is as follows: An ultrasonic water meter turbulence test pipeline tooling comprises a fluid pipeline, wherein an internal turbulence structure and a bubble generating structure are arranged in the fluid pipeline, wherein the internal turbulence structure comprises a spiral vortex generating sheet and a plurality of turbulence sheets, wherein the spiral vortex generating sheet is located at the starting section of the flow field of the pipeline, wherein the spiral vortex generating sheet is provided with a plurality of ribbed structures, wherein the turbulence sheet is located at the end section of the fluid pipeline, wherein the bubble generating structure comprises a plurality of central gas injection holes and a plurality of circumferential gas injection holes, wherein the central gas injection hole is arranged at the starting point of the spiral vortex generating sheet, wherein the central gas injection holes are evenly arranged along the diameter direction of the fluid pipeline, wherein the circumferential gas injection holes are arranged on the fluid pipeline at the starting point of the spiral vortex generating sheet, wherein the circumferential gas injection holes are evenly arranged along the inner wall of the fluid pipeline, wherein a plurality of turbulence sheets are evenly distributed on the inner wall of the fluid pipeline, and wherein the central gas injection hole and the circumferential gas injection holes are respectively connected to a gas source.

[0006] The above technical solution adopts an internal turbulence structure and a bubble generating structure to simulate a water flow field containing both bubbles and vortices, and provides conditions for testing the flow accuracy of an ultrasonic water meter under the condition of uneven distribution of bubble density and size in a vortex flow field.

[0007] Preferably, the spiral vortex generating sheet is a thin sheet structure, the thickness of the spiral vortex generating sheet is 1 / 28-1 / 32 of the diameter of the fluid pipeline, the ratio of the pitch of the spiral vortex generating sheet to the diameter of the fluid pipeline is 0.8-1.2, and the optimal spiral angle of the spiral vortex generating sheet is 40°-50°.

[0008] Through the above technical solution, the ultrasonic water meter disturbance flow test pipeline tooling can better simulate the vortex state of water flow.

[0009] Preferably, the thickness of the spiral vortex generating sheet is 1 / 30 of the diameter of the fluid pipeline, the ratio of the pitch of the spiral vortex generating sheet to the diameter of the fluid pipeline is 1, and the optimal helix angle of the spiral vortex generating sheet is 45°.

[0010] Through the above technical solution, the ultrasonic water meter disturbance flow test pipeline tooling can simulate the vortex state of water flow to achieve the best effect.

[0011] Preferably, the spiral vortex generating sheet is provided with a plurality of ribbed structures, the cross-section of the ribbed structure is rectangular, the rib height of the ribbed structure is 1 / 3-1 / 2 of the total thickness of the thin sheet structure, the plurality of ribbed structures are evenly arranged along the water flow direction at a spacing of 2 times the rib height, and the central gas injection holes are evenly distributed on the starting ribbed structure.

[0012] Through the above technical scheme, the spiral vortex generating sheet can not only keep the spiral structure from deformation when impacted by water flow, but also enable the ribbed structure to disturb the bubbles close to the spiral sheet structure, so that the bubbles are evenly distributed on the surface of the spiral sheet to a certain thickness.

[0013] Preferably, the cross-section of the corrugated structure is rectangular, and the corrugation height of the corrugated structure is 1 / 2 of the total thickness of the thin sheet structure.

[0014] Through the above technical solution, the spiral vortex generating sheet can have a better disturbing effect on bubbles.

[0015] Preferably, the diameter of the central gas injection hole is 2-4 mm, the spacing between the central gas injection holes is 2-4 times the diameter, the diameter of the circumferential gas injection holes is 2-4 mm, and the spacing between the circumferential gas injection holes is 2-4 times the diameter.

[0016] Through the above technical solution, the bubbles generated by the central gas injection hole and the circumferential gas injection holes are made more uniform.

[0017] Preferably, independent regulating valves capable of controlling the pressure and flow of injected gas are respectively provided at both ends of the central gas injection hole, and the circumferential gas injection holes are respectively distributed on the circumference of two semicircular tube walls and are respectively provided with independent regulating valves capable of controlling the pressure and flow of injected gas.

[0018] Through the above technical solution, it is possible to inject air from one end of the central gas injection hole or from both ends and adjust the flow rate and pressure of the injected air. At the same time, it is possible to inject air into one semicircular tube wall or two semicircular tube walls of the circumferential gas injection hole and adjust the flow rate and pressure of the injected air.

[0019] Preferably, the gas pressure in the central gas injection hole is 1.2-1.6 times the water pressure in the fluid pipeline, and the gas pressure in the circumferential gas injection holes is 1.2-1.6 times the water pressure in the fluid pipeline.

[0020] Through the above technical solution, various bubble states in the fluid pipeline can be better simulated.

[0021] Preferably, flange structures are respectively provided at both ends of the fluid pipeline.

[0022] Through the above technical solution, the fluid pipeline can be connected to the water meter through the flange to model various water flow conditions.

[0023] Preferably, an observation window is provided at the end section of the fluid pipeline.

[0024] Through the above technical solution, the bubbles and flow field state in the fluid pipeline can be observed through the observation window.

[0025] The beneficial effects of the present invention are:

[0026] 1. Use internal disturbance flow structure and bubble generation structure to simulate the flow field containing bubbles and vortices, and provide conditions for testing the flow accuracy of ultrasonic water meters in the vortex flow field under the condition of uneven distribution of bubble density and size. Since the flow measurement characteristics of ultrasonic water meters are sensitive to the state of water vortices and bubbles in the flow field, this disturbance flow test pipe section tooling can simulate the flow measurement accuracy characteristics of ultrasonic water meters under different water vortex and bubble distribution states in the pipe section under user conditions.

[0027] 2. A ribbed structure is provided on the spiral vortex generating sheet, so that the spiral vortex generating sheet can not only keep the spiral structure from being deformed when impacted by water flow, but also enable the ribbed structure to disturb the bubbles close to the spiral sheet structure, so that the bubbles are evenly distributed on the surface of the spiral sheet with a certain thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] in:

[0030] Figure 1 The structure of Example 1 is shown in FIG. Figure 1 ;

[0031] Figure 2 Based Figure 1 The enlarged schematic diagram of part A in the middle;

[0032] Figure 3 The structure of Example 1 is shown in FIG. Figure 2 ;

[0033] Figure 4 It is a top view of Example 1;

[0034] Figure 5 for Figure 4 BB cross-sectional view;

[0035] Figure 6 for Figure 4 AA section view;

[0036] 1. Fluid pipeline, 11. Spiral vortex generating plate, 111. Ridge-like structure, 12. Spoiler, 13. Central gas injection hole, 14. Circumferential gas injection hole, 2. Flange structure, 3. Observation window, 4. Control valve. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from this description, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] like Figure 1-6 As shown, an ultrasonic water meter disturbance flow test pipeline tool comprises a fluid pipeline 1, and flange structures 2 are respectively arranged at both ends of the fluid pipeline 1. An observation window 3 is arranged at the end of the fluid pipeline 1. An internal turbulence structure and a bubble generating structure are arranged in the fluid pipeline 1, the internal turbulence structure includes a spiral vortex generating sheet 11 and a plurality of turbulence sheets 12, the spiral vortex generating sheet 11 is located in the starting section of the flow field of the pipeline, the spiral vortex generating sheet 11 is provided with a plurality of ribbed structures 111, the turbulence sheets 12 are located in the last section of the fluid pipeline, the bubble generating structure includes a plurality of central gas injection holes 13 and a plurality of circumferential gas injection holes 14, the central gas injection hole 13 is arranged at the starting point of the spiral vortex generating sheet 11, the central gas injection holes 13 are evenly arranged along the diameter direction of the fluid pipeline 1, the circumferential gas injection holes 14 are arranged on the fluid pipeline 1 at the starting point of the spiral vortex generating sheet, the circumferential gas injection holes 14 are evenly arranged along the inner wall of the fluid pipeline 1, a plurality of turbulence sheets are evenly distributed on the inner wall of the fluid pipeline 1, the central gas injection hole 13 and the circumferential gas injection holes 14 are respectively connected to the gas source.

[0041] The two ends of the central gas injection hole 13 are respectively provided with independent regulating valves 4 capable of controlling the pressure and flow of the injected gas. The circumferential gas injection holes 14 are respectively distributed on the circumference of the two semicircular tube walls and are respectively provided with independent regulating valves 4 capable of controlling the pressure and flow of the injected gas.

[0042] The gas pressure in the central gas injection hole 13 is 1.2-1.6 times the water pressure in the fluid pipeline 1 , and the gas pressure in the circumferential gas injection hole 14 is 1.2-1.6 times the water pressure in the fluid pipeline 1 .

[0043] The spiral vortex generating sheet 11 arranged in the fluid pipeline 1 is a thin sheet structure, and the thickness of the thin sheet structure is 1 / 28 to 1 / 32 of the diameter of the fluid pipeline 1, and the optimal value is 1 / 30; the pitch of the thin sheet structure is 0.8 times the pipeline diameter to 1.2 times the pipeline diameter, and the optimal value is 1 times the pipeline diameter, and the optimal spiral angle is 45°; the surface of the thin sheet structure is a ribbed structure 111 with a rectangular cross-section, and the rib height of the ribbed structure 111 is 1 / 3 to 1 / 2 of the total thickness of the thin sheet structure, and the optimal value is 1 / 2, and it is evenly arranged along the water flow direction at a spacing of 2 times the rib height. The thin sheet structure arranged in this way can not only keep the spiral structure from deformation when impacted by water flow, but also enable the ribbed structure to disturb the bubbles close to the spiral thin sheet structure, so that the bubbles are evenly distributed on the surface of the thin sheet structure with a certain thickness.

[0044] The apertures of the central gas injection hole 13 and the circumferential gas injection holes 14 are 2 mm to 4 mm, usually set to 3 mm. The apertures of the central gas injection hole 13 or the circumferential gas injection holes 14 are evenly distributed on the starting ridges of the thin sheet structure at intervals, and are connected to the gas source; the circumferential gas injection holes 14 have the same diameter as the central gas injection hole 13, and are evenly distributed on the circumferential surface of the pipe at intervals of 2-4 times the aperture of the circumferential gas injection holes 14.

[0045] The two ends of the central gas injection hole 13 are respectively provided with independent regulating valves (4) capable of controlling the pressure and flow of the injected gas. The circumferential gas injection holes 14 are respectively distributed on the circumference of the two semicircular tube walls and are respectively provided with independent regulating valves 4 capable of controlling the pressure and flow of the injected gas.

[0046] The gas pressure and gas flow of the exhaust holes on the two semicircles and the starting ridge can be controlled individually by a gas regulating valve. The gas pressure is 1.2-1.6 times the water pressure in the fluid pipeline, and the gas regulating valve 4 can make the gas pressure fluctuate periodically, thereby adjusting the bubbles generated in the pipeline to be continuous gas columns or discontinuous bubbles, and the pressure and flow fluctuation periods can be adjusted.

[0047] A testing method for ultrasonic water meter disturbance test pipeline tooling,

[0048] When simulating flow field operation, the ultrasonic water meter disturbance flow test pipework is clamped on the water meter calibration equipment, and the ultrasonic water meter to be tested is simultaneously clamped in series downstream of the ultrasonic water meter disturbance flow test pipe section, and water is passed into the pipe section of the water meter calibration equipment to fill the test pipe section and the ultrasonic water meter with water. Under the condition of being full of water, a characteristic flow error test is performed on the ultrasonic water meter to test the metering characteristic error of the water meter under the simulated vortex flow field, and the test results are compared with the metering characteristic error results of the water meter when the ultrasonic water meter disturbance flow test pipe section is not clamped, so as to analyze the influence of the vortex flow field on the metering error characteristics of the ultrasonic water meter, and make targeted improvements to the structure of the ultrasonic water meter;

[0049] Inject gas from one end of the central gas injection hole, analyze the uneven distribution of the centerline gas along the centerline, analyze the joint influence of the uneven distribution of the centerline gas and the vortex flow field on the measurement error characteristics of the ultrasonic water meter, and make targeted improvements to the ultrasonic water meter structure. And the measurement error characteristics of the ultrasonic water meter can be tested under different conditions by controlling different gas pressures and flows through the gas pressure and flow control valve 4;

[0050] Inject gas from both ends of the central gas injection hole, analyze the uniform distribution of the centerline gas along the centerline, analyze the joint influence of the uniform distribution of the centerline gas and the vortex flow field on the measurement error characteristics of the ultrasonic water meter, and make targeted improvements to the ultrasonic water meter structure. And the measurement error characteristics of the ultrasonic water meter can be tested under different conditions by simultaneously adjusting the gas pressure and flow control valves on both sides to control different gas pressures and flows;

[0051] Gas is injected from a circumferential gas injection hole on the wall of a semicircular tube, and the combined influence of unilateral circumferential gas distribution and vortex flow field on the measurement error characteristics of ultrasonic water meters is analyzed, and targeted improvements are made to the structure of ultrasonic water meters. In addition, the measurement error characteristics of ultrasonic water meters can be tested under different conditions by simultaneously adjusting the gas pressure and flow control valve 4 to control different gas pressures and flows;

[0052] Gas is injected from the circumferential gas injection hole of a semicircular tube wall, and the combined influence of the circumferential gas distribution and vortex flow field on the ultrasonic water meter measurement error characteristics is analyzed, and the ultrasonic water meter structure is improved in a targeted manner. In addition, the ultrasonic water meter measurement error characteristics can be tested under different conditions by simultaneously adjusting the gas pressure and flow control valve 4 on both sides to control different gas pressures and flows.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An ultrasonic water meter disturbance flow test pipeline tool, characterized by: The invention comprises a fluid pipeline (1), wherein an internal flow disturbance structure and a bubble generating structure are arranged in the fluid pipeline (1), wherein the internal flow disturbance structure comprises a spiral vortex generating sheet (11) and a plurality of flow disturbance sheets (12), wherein the spiral vortex generating sheet (11) is located at the starting section of the flow field of the pipeline, and the flow disturbance sheet (12) is located at the end section of the fluid pipeline, and the bubble generating structure comprises a plurality of central gas injection holes (13) and a plurality of circumferential gas injection holes (14), wherein the central gas injection hole (13) is arranged at the spiral vortex generating sheet (11) and the circumferential gas injection holes (14). At the starting point of the spiral vortex generating sheet (11), the central gas injection hole (13) is evenly arranged along the diameter direction of the fluid pipeline (1), the circumferential gas injection hole (14) is provided on the fluid pipeline (1) at the starting point of the spiral vortex generating sheet, the circumferential gas injection hole (14) is evenly arranged along the inner wall of the fluid pipeline (1), a plurality of spoilers are evenly distributed on the inner wall of the fluid pipeline (1), and the central gas injection hole (13) and the circumferential gas injection hole (14) are respectively connected to a gas source.

2. According to claim 1, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: The spiral vortex generating sheet (11) is a thin sheet structure, the thickness of the spiral vortex generating sheet (11) is 1 / 28-1 / 32 of the diameter of the fluid pipeline, the ratio of the pitch of the spiral vortex generating sheet (11) to the diameter of the fluid pipeline is 0.8-1.2, and the optimal helix angle of the spiral vortex generating sheet (11) is 40°-50°.

3. According to claim 2, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: The thickness of the spiral vortex generating sheet (11) is 1 / 30 of the diameter of the fluid pipeline, the ratio of the pitch of the spiral vortex generating sheet (11) to the diameter of the fluid pipeline is 1, and the optimal helical angle of the spiral vortex generating sheet (11) is 45°.

4. According to claim 2, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: The spiral vortex generating sheet (11) is provided with a plurality of corrugated structures (111), the cross-section of the corrugated structure (111) is rectangular, the corrugation height of the corrugated structure (111) is 1 / 2 of the total thickness of the sheet-like structure, the plurality of corrugated structures (111) are evenly arranged along the water flow direction at a spacing twice the corrugation height, the central gas injection hole (13) is evenly distributed on the starting corrugated structure (111), and the cross-section of the corrugated structure (111) is rectangular.

5. According to claim 1, the ultrasonic water meter disturbance flow test pipeline tooling is characterized by: The diameter of the central gas injection hole (13) is 2-4 mm, and the spacing between the central gas injection holes (13) is 2-4 times the diameter; the diameter of the circumferential gas injection holes (14) is 2-4 mm, and the spacing between the circumferential gas injection holes (14) is 2-4 times the diameter.

6. According to claim 1, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: Independent regulating valves (4) capable of controlling the pressure and flow of injected gas are respectively provided at both ends of the central gas injection hole (13), and the circumferential gas injection holes (14) are respectively distributed on the circumference of two semicircular tube walls and are respectively provided with independent regulating valves (4) capable of controlling the pressure and flow of injected gas.

7. According to claim 1, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: The gas pressure in the central gas injection hole (13) is 1.2-1.6 times the water pressure in the fluid pipeline (1), and the gas pressure in the circumferential gas injection hole (14) is 1.2-1.6 times the water pressure in the fluid pipeline (1).

8. According to claim 1, the ultrasonic water meter disturbance flow test pipeline tooling is characterized by: Flange structures (2) are respectively provided at both ends of the fluid pipeline (1).

9. According to claim 1, an ultrasonic water meter disturbance flow test pipeline tooling, characterized in that: The end section of the fluid pipeline (1) is provided with an observation window (3).

10. A test method for ultrasonic water meter disturbance test pipeline tooling, characterized in that: Using the ultrasonic water meter disturbance flow test pipeline tooling as described in claims 1-9, When simulating flow field operation, the ultrasonic water meter disturbance flow test pipework is clamped on the water meter calibration equipment, and the ultrasonic water meter to be tested is simultaneously clamped in series downstream of the ultrasonic water meter disturbance flow test pipe section, and water is passed into the pipe section of the water meter calibration equipment to fill the test pipe section and the ultrasonic water meter with water. Under the condition of being full of water, a characteristic flow error test is performed on the ultrasonic water meter to test the metering characteristic error of the water meter under the simulated vortex flow field, and the test results are compared with the metering characteristic error results of the water meter when the ultrasonic water meter disturbance flow test pipe section is not clamped, so as to analyze the influence of the vortex flow field on the metering error characteristics of the ultrasonic water meter, and make targeted improvements to the structure of the ultrasonic water meter; Inject gas from one end of the central gas injection hole, analyze the uneven distribution of the centerline gas along the centerline, analyze the joint influence of the uneven distribution of the centerline gas and the vortex flow field on the measurement error characteristics of the ultrasonic water meter, and the measurement error characteristics of the ultrasonic water meter can be tested under different conditions by controlling different gas pressures and flows through the gas pressure and flow regulating valve; Inject gas from both ends of the central gas injection hole, analyze the uniform distribution of the centerline gas along the centerline, analyze the joint influence of the uniform distribution of the centerline gas and the vortex flow field on the measurement error characteristics of the ultrasonic water meter, and the measurement error characteristics of the ultrasonic water meter can be tested under different conditions by simultaneously adjusting the gas pressure and flow regulating valves on both sides to control different gas pressures and flows; Gas is injected from a circumferential gas injection hole on the wall of a semicircular tube to analyze the combined effects of unilateral circumferential gas distribution and vortex flow field on the measurement error characteristics of ultrasonic water meters. The measurement error characteristics of ultrasonic water meters can be tested under different conditions by simultaneously adjusting the gas pressure and flow control valve to control different gas pressures and flows. Gas is injected from the circumferential gas injection hole on the wall of a semicircular tube to analyze the combined influence of the circumferential gas distribution and the vortex flow field on the measurement error characteristics of the ultrasonic water meter. The measurement error characteristics of the ultrasonic water meter can be tested under different conditions by simultaneously adjusting the gas pressure and flow regulating valves on both sides to control different gas pressures and flows.

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