Ultrasonic water meter turbulent flow test pipeline tool

Abstract

The utility model 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 arranged on 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 utility model relates to the field of ultrasonic water meter disturbance test pipe section frock technology, especially to a kind of ultrasonic water meter disturbance test pipe section frock containing bubble and vortex generating structure. BACKGROUND

[0002] Water meter as important measuring instrument for measuring water flow, its measurement accuracy, measurement range, use reliability, life and function and manufacturing cost are related to the measurement of water and the settlement of water fee, and have use value in controlling water, saving water and water management. Different types of water meters need to be simulated through different detection equipment in the process of research and development and production sampling inspection, user use condition, special condition that can potentially affect the accuracy of water meter and extreme condition, so that water meter can meet the required accuracy under various environmental conditions and be used for a long time.

[0003] Among the many factors affecting the flow accuracy error of water meter, the most influential and sensitive is the water flow vortex disturbance condition, and the most sensitive to the accuracy of ultrasonic water meter is the condition that water contains bubbles, so a test pipe frock is needed to simulate the distribution of bubbles in flow field and the extreme condition containing bubbles and vortex. INVENTION CONTENTS

[0004] In order to solve the above technical problems, the utility model provides an ultrasonic water meter disturbance test pipe frock, which uses internal disturbance structure and bubble generating structure to simulate the water flow condition containing bubbles and vortex in water flow field, and provides the condition for testing the flow accuracy of ultrasonic water meter under the condition of uneven distribution of bubble density and size in vortex flow field.

[0005] The specific technical scheme is as follows: an ultrasonic water meter disturbance test pipe frock, comprising a fluid pipe, an internal disturbance structure and a bubble generating structure are arranged in the fluid pipe, the internal disturbance structure comprises a spiral vortex generating sheet and a plurality of disturbance sheets, the spiral vortex generating sheet is located at the starting section of the flow field of the pipe, the spiral vortex generating sheet is provided with a plurality of corrugated structures, the disturbance sheet is located at the end section of the fluid pipe, the bubble generating structure comprises a plurality of central gas injection holes and a plurality of circumferential gas injection holes, the central gas injection hole is arranged at the starting position of the spiral vortex generating sheet, the central gas injection hole is uniformly arranged along the diameter direction of the fluid pipe, the circumferential gas injection hole is arranged on the fluid pipe at the starting position of the spiral vortex generating sheet, the circumferential gas injection hole is uniformly arranged along the inner wall of the fluid pipe, a plurality of disturbance sheets are uniformly distributed on the inner wall of the fluid pipe, and the central gas injection hole and the circumferential gas injection hole are respectively communicated with a gas source.

[0006] The internal disturbance structure and the bubble generating structure are used to simulate the water flow condition containing bubbles and vortexes in the water flow field, and to provide the condition for testing the flow accuracy of the ultrasonic water meter under the condition that the bubble density and size are unevenly distributed in the vortex flow field.

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

[0008] The above technical solution can better simulate the vortex state of the water flow.

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

[0010] The above technical solution can simulate the vortex state of the water flow to achieve the best effect.

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

[0012] The above technical solution can make the spiral vortex generating sheet maintain the spiral structure without deformation when impacted by the water flow, and can also make the ridge structure disturb the bubbles close to the spiral sheet structure, so that the bubbles are evenly distributed on the spiral sheet surface within a certain thickness.

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

[0014] The above technical solution can make the spiral vortex generating sheet have a better disturbance effect on the bubbles.

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

[0016] The above technical solution can make the bubbles generated by the central gas injection hole and the circumferential gas injection hole more uniform.

[0017] Preferably, the center gas injection hole is provided with independent adjustable valves for controlling the injection gas pressure and flow rate at both ends, and the circumferential gas injection holes are distributed on the circumferences of the two semicircular pipe walls and are provided with independent adjustable valves for controlling the injection gas pressure and flow rate.

[0018] Through the above technical solution, air can be injected from one end of the center gas injection hole, or from both ends, and the flow rate and pressure of the injected air can be adjusted. At the same time, one semicircular pipe wall or both semicircular pipe walls of the circumferential gas injection hole can inject air, and the flow rate and pressure of the injected air can be adjusted.

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

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

[0021] Preferably, the two ends of the fluid pipe are provided with flange structures.

[0022] Through the above technical solution, the fluid pipe can be connected to the water meter through the flange for simulating various water flow states.

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

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

[0025] The beneficial effects of the utility model are as follows:

[0026] 1. The internal turbulence structure and bubble generation structure are used to simulate the water flow condition containing bubbles and vortices in the water flow field, and to provide the condition 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. Since the flow measurement characteristics of the ultrasonic water meter are sensitive to the water vortex and bubble state in the flow field, the flow measurement accuracy characteristics of the ultrasonic water meter under different water vortex and bubble distribution states in the pipe section under user conditions can be simulated by the turbulence test pipe section tool.

[0027] 2. The corrugated structure is arranged on the spiral vortex generating sheet, so that the spiral vortex generating sheet can maintain the spiral structure without deformation when the water flow impacts, and the corrugated structure can disturb the bubbles close to the spiral sheet structure, so that the bubbles are evenly distributed on the surface of the spiral sheet within a certain thickness. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not deviating from the concept of the present application. Among them:

[0029] Figure 1 Structure diagram of embodiment 1 Figure 1 ;

[0030] Figure 2 Enlarged diagram of part A in the present application Figure 1 ;

[0031] Figure 3 Structure diagram of embodiment 1 Figure 2 ;

[0032] Figure 4 Top view of embodiment 1

[0033] Figure 5 B-B sectional view of Figure 4 ;

[0034] Figure 6 A-A sectional view of Figure 4 ;

[0035] 1, fluid pipeline, 11, spiral type vortex generating piece, 111, corrugated structure, 12, spoiler, 13, central gas injection hole, 14, circumferential gas injection hole, 2, flange structure, 3, observation window, 4, regulating valve. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from the description, and those skilled in the art can make similar generalizations without deviating from the concept of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0037] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0038] Embodiment 1

[0039] AsFigures 1-6 As shown in the figure, an ultrasonic water meter perturbation test pipeline tool includes a fluid pipeline 1, both ends of which are provided with flange structures 2. The fluid pipeline 1 is provided with an observation window 3 at the end. The fluid pipeline 1 is provided with an internal perturbation structure and a bubble generation structure, the internal perturbation structure includes a spiral vortex generation sheet 11 at the initial section of the flow field of the pipeline, the spiral vortex generation sheet 11 is provided with a plurality of corrugated structures 111, the perturbation sheet 12 is located at the end of the fluid pipeline, the bubble generation structure includes a plurality of central gas injection holes 13 and a plurality of circumferential gas injection holes 14, the central gas injection holes 13 are arranged at the beginning of the spiral vortex generation sheet 11, the central gas injection holes 13 are uniformly 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 beginning of the spiral vortex generation sheet, and the circumferential gas injection holes 14 are uniformly arranged along the inner wall of the fluid pipeline 1. A plurality of perturbation sheets are uniformly distributed on the inner wall of the fluid pipeline 1, and the central gas injection holes 13 and the circumferential gas injection holes 14 are respectively connected with a gas source.

[0040] Both ends of the central gas injection hole 13 are respectively provided with an adjustable valve 4 capable of controlling the injection gas pressure and flow rate, and the circumferential gas injection hole 14 is respectively distributed on the two semicircular pipe wall circumferences and is respectively provided with an adjustable valve 4 capable of controlling the injection gas pressure and flow rate.

[0041] 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.

[0042] The spiral vortex generation sheet 11 arranged in the fluid pipeline 1 is a sheet structure, the thickness of the sheet structure is 1 / 28 to 1 / 32 of the diameter of the fluid pipeline 1, and the optimal thickness is 1 / 30; the pitch of the sheet structure is 0.8 times the diameter of the pipeline to 1.2 times the diameter of the pipeline, and the optimal pitch is 1 times the diameter of the pipeline, and the optimal helix angle is 45°; the surface of the sheet structure is a corrugated structure 111 with a rectangular cross section, the corrugated structure 111 has a corrugated height of 1 / 3 to 1 / 2 of the total thickness of the sheet structure, and the optimal corrugated height is 1 / 2, and the corrugated height is uniformly arranged at a distance of 2 times the corrugated height in the water flow direction. The sheet structure arranged in this way can not only maintain the spiral structure unchanged when the water flow impacts, but also can disturb the bubbles close to the spiral sheet structure, so that the bubbles are evenly distributed on the surface of the sheet structure within a certain thickness.

[0043] The center gas injection hole 13 and the circumferential gas injection hole 14 have a diameter of 2mm to 4mm, usually 3mm, and the diameter of the center gas injection hole 13 or the circumferential gas injection hole 14 is uniformly distributed on the starting ridge of the sheet structure and is in communication with the gas source; the circumferential gas injection hole 14 and the center gas injection hole 13 have the same diameter, and the circumferential gas injection hole 14 is uniformly distributed on the circumferential surface of the pipe with a diameter of 2-4 times the diameter of the circumferential gas injection hole 14.

[0044] The center gas injection hole 13 is provided with an independent adjustable valve 4 at both ends, which can control the injection gas pressure and flow rate, and the circumferential gas injection hole 14 is distributed on the circumferential wall of the two semicircular pipes and is provided with an independent adjustable valve 4 which can control the injection gas pressure and flow rate.

[0045] The exhaust holes on the two semicircular circumferences and the starting ridge can be individually controlled by the gas regulating valve, and the gas pressure is 1.2-1.6 times the water pressure in the fluid pipe, and the gas regulating valve 4 can make the gas pressure fluctuate periodically, so as to adjust the generated gas bubbles in the pipe to be continuous gas columns or discontinuous gas bubbles, and the pressure and flow fluctuation period can be adjusted.

[0046] A test method of an ultrasonic water meter disturbance test pipe tool,

[0047] During the simulation of the flow field operation, the ultrasonic water meter disturbance test pipe tool is clamped on the water meter calibration equipment, and the ultrasonic water meter to be tested is simultaneously clamped in series on the downstream of the ultrasonic water meter disturbance test pipe section, water is passed into the pipe section of the water meter calibration equipment, and the test pipe section and the ultrasonic water meter are filled with water. Under the condition of being filled with water, the characteristic flow error test of the ultrasonic water meter is carried out to test the metering characteristic error of the water meter under the condition of simulating the vortex flow field, and the test result is compared with the metering characteristic error result of the water meter without clamping the ultrasonic water meter disturbance test pipe section, so as to analyze the influence of the vortex flow field on the metering error characteristic of the ultrasonic water meter, and to improve the structure of the ultrasonic water meter;

[0048] Gas is injected from one end of the center gas injection hole, and the common influence of the non-uniform distribution of the center line gas along the center line and the vortex flow field on the metering error characteristic of the ultrasonic water meter is analyzed, and the structure of the ultrasonic water meter is improved accordingly. And the gas pressure and flow regulating valve 4 can control different gas pressures and flow rates to test the metering error characteristics of the ultrasonic water meter under different conditions;

[0049] Gas is injected from both ends of the center gas injection hole, the uniform distribution of the center line gas along the center line is analyzed, the combined effect of the uniform distribution of the center line gas and the vortex flow field on the measurement error characteristics of the ultrasonic water meter is analyzed, and the structure of the ultrasonic water meter is improved accordingly. And the measurement error characteristics of the ultrasonic water meter under different conditions can be tested by adjusting the gas pressure and flow regulating valve on both sides at the same time.

[0050] Gas is injected from a half-circular pipe wall circumferential gas injection hole, the combined effect of one-side circumferential gas distribution and vortex flow field on the measurement error characteristics of the ultrasonic water meter is analyzed, and the structure of the ultrasonic water meter is improved accordingly. And the measurement error characteristics of the ultrasonic water meter under different conditions can be tested by adjusting the gas pressure and flow regulating valve 4.

[0051] Gas is injected from a half-circular pipe wall circumferential gas injection hole, the combined effect of one-side circumferential gas distribution and vortex flow field on the measurement error characteristics of the ultrasonic water meter is analyzed, and the structure of the ultrasonic water meter is improved accordingly. And the measurement error characteristics of the ultrasonic water meter under different conditions can be tested by adjusting the gas pressure and flow regulating valve 4.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application. Its all should be covered in the scope of the claims of the present application.

Claims

1. An ultrasonic water meter perturbation testing conduit fixture, characterized by: The fluid pipeline (1) is provided with an internal turbulence structure and a bubble generating structure, the internal turbulence structure includes a spiral vortex generating sheet (11) at the initial section of the flow field of the pipeline, the spiral vortex generating sheet (11) is provided with a plurality of ridge structures (111), and the turbulence sheet (12) is located at the end section of the fluid pipeline.

2. The ultrasonic water meter perturbation test conduit tool of claim 1, wherein: The spiral vortex generating sheet (11) is a sheet structure, the thickness of the spiral vortex generating sheet (11) is 1 / 28-1 / 32 of the diameter of the fluid pipeline, the pitch of the spiral vortex generating sheet (11) is 0.8-1.2 times of the diameter of the fluid pipeline, and the helix angle of the spiral vortex generating sheet (11) is 40°-50°.

3. The ultrasonic water meter perturbation test conduit tooling of claim 2, wherein: The thickness of the spiral vortex generating sheet (11) is 1 / 30 of the diameter of the fluid pipeline, the pitch of the spiral vortex generating sheet (11) is 1 times of the diameter of the fluid pipeline, and the helix angle of the spiral vortex generating sheet (11) is 45°.

4. The ultrasonic water meter perturbation test conduit tool of claim 2, wherein: The cross section of the ridge structure (111) is rectangular, the ridge height of the ridge structure (111) is 1 / 3-1 / 2 of the total thickness of the sheet structure, a plurality of ridge structures (111) are uniformly arranged along the water flow direction with a ridge height of 2 times the interval, and the central gas injection hole (13) is uniformly distributed on the initial ridge structure (111).

5. The ultrasonic water meter perturbation test conduit tooling of claim 1, wherein: The diameter of the central gas injection hole (13) is 2-4mm, the interval of the central gas injection hole (13) is 2-4 times of the diameter, the diameter of the circumferential gas injection hole (14) is 2-4mm, and the interval of the circumferential gas injection hole (14) is 2-4 times of the diameter.

6. The ultrasonic water meter perturbation test conduit tool of claim 1, wherein: The central gas injection hole (13) is provided with an independent adjustable valve (4) capable of controlling the injection gas pressure and flow rate at both ends, and the circumferential gas injection hole (14) is distributed on the two semicircular pipe wall circumferences and is provided with an independent adjustable valve (4) capable of controlling the injection gas pressure and flow rate.

7. The ultrasonic water meter perturbation test conduit tool of claim 1, wherein: The gas pressure in the central gas injection hole (13) is 1.2-1.6 times of 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 of the water pressure in the fluid pipeline (1).

8. The ultrasonic water meter perturbation test conduit tooling of claim 7, wherein: The fluid pipeline (1) is provided with a flange structure (2) at both ends.

9. The ultrasonic water meter perturbation test conduit tooling of claim 1, wherein: The fluid pipe (1) end section is provided with an observation window (3).

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