A wide-range vortex flowmeter with strong anti-interference

Abstract

The application discloses a wide-range vortex flowmeter with strong anti-interference, and relates to the technical field of flowmeters.The wide-range vortex flowmeter comprises a measuring pipe, a stabilizing assembly is fixed in the inlet end of the measuring pipe, a vortex generator is vertically fixed in the measuring pipe, a support is installed on the measuring pipe by using an isolating assembly, a detection head is swingingly arranged in the support, the detection head is located behind the vortex generator, a measuring table is fixed above the support and is electrically connected with the detection head.The application accelerates fluid by using a contraction pipe, makes the fluid flow to a honeycomb disc, cuts vortex scale by the honeycomb disc, reduces the formation of turbulent flow, restores the flow velocity by using an expansion pipe, forms a laminar flow field, realizes accurate control of the flow velocity, avoids the influence of turbulent disturbance flow field on the flow velocity, and displays the detection result on the measuring table by using an intelligent sensor module.

Description

Technical Field

[0001] This invention relates to the field of flow meter technology, specifically a wide-range vortex flow meter with strong anti-interference capabilities. Background Technology

[0002] Vortex flow meters are volumetric flow meters that measure the volumetric flow rate, standard volumetric flow rate, or mass flow rate of gases, steam, or liquids based on the Karman vortex street principle. They are mainly used for measuring the flow rate of fluids in industrial pipelines, such as gases, liquids, and steam. During measurement, the oscillation frequency of the detection head is transmitted to the measuring instrument through a piezoelectric intelligent sensor for calculation and measurement.

[0003] Existing vortex flow meters have poor anti-interference capabilities. Uneven flow velocity distribution in the pipe can cause vortex frequency fluctuations, affecting measurement accuracy. External vibrations (such as those from nearby equipment) may trigger resonance, distorting the vortex signal. The impact of vibration is more significant in large-diameter pipes. Furthermore, pipe vibration, fluid pulsation, and flow field distortion can easily overwhelm the true vortex signal, leading to measurement errors.

[0004] To address the above problems, this invention provides a wide-range vortex flow meter with strong anti-interference capabilities, thereby solving the aforementioned issues. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wide-range vortex flow meter with strong anti-interference capabilities, comprising:

[0006] The measuring tube has a stabilizing component fixed inside its inlet end;

[0007] The vortex generator is vertically fixed inside the measuring tube;

[0008] The support is installed on the measuring tube using an isolation component, and a detection head is oscillating inside the support, with the detection head located behind the vortex generator;

[0009] The measuring instrument is fixed above the bracket and electrically connected to the detection head.

[0010] Further, preferably, the stabilizing component includes:

[0011] A shrink tube is fixed inside the measuring tube;

[0012] The honeycomb disk is fixed on the side of the contraction tube near the vortex generator.

[0013] An expansion tube is fixed to the side of the honeycomb disk away from the contraction tube.

[0014] Furthermore, preferably, the diameter of the contraction tube decreases sequentially from the inlet of the measuring tube toward the honeycomb disk, and the diameter of the expansion tube increases sequentially from the honeycomb disk toward the vortex generator, and the increase in flow velocity by the contraction tube is the same as the decrease in flow velocity by the expansion tube.

[0015] Further, preferably, the vortex shedding generator includes:

[0016] The trapezoidal component is fixed inside the measuring tube;

[0017] Vortex street generating walls are formed on both sides of the trapezoidal member;

[0018] Multiple vibration damping grooves are configured and equidistantly opened on the vortex street generating wall.

[0019] Furthermore, preferably, the distance between the trapezoidal member and the expansion tube is at least twice the diameter of the measuring tube, and the vibration damping groove is arranged perpendicular to the fluid flow direction.

[0020] Further, preferably, the isolation component includes:

[0021] A flexible damping element is sealed and fixed inside the measuring tube, and the bracket is sealed and fixed inside the flexible damping element;

[0022] Multiple guide posts are configured and fixed to the outer wall of the measuring tube, and the multiple guide posts are arranged circumferentially around the bracket as the axis;

[0023] A sliding disk is slidably mounted on multiple guide columns and is coaxially arranged with the bracket;

[0024] A longitudinal damping spring is sleeved on the guide post and located between the sliding disk and the measuring tube;

[0025] A flexible ring is slidably fitted onto the outer wall of the bracket;

[0026] Multiple transverse damping springs are configured and arranged circumferentially between the flexible ring and the sliding disc.

[0027] Furthermore, preferably, the fluid in the measuring tube generates a main vortex street through the trapezoidal member, and the main vortex streets on both sides of the trapezoidal member rotate in opposite directions. When the fluid passes through the vibration damping groove, a secondary vortex street is generated, and the main vortex street and the secondary vortex street on the same side of the trapezoidal member rotate in opposite directions.

[0028] Compared with the prior art, the present invention provides a wide-range vortex flow meter with strong anti-interference capabilities, which has the following beneficial effects:

[0029] In this invention, the fluid is accelerated by a contraction tube, causing it to flow rapidly toward a honeycomb disk. The honeycomb disk cuts through the vortex scale, thereby reducing turbulence formation. The flow velocity is then restored by an expansion tube, forming a laminar flow field and achieving precise velocity control. This avoids the influence of turbulent disturbances on the flow velocity. Furthermore, the acceleration of the contraction tube and the deceleration of the expansion tube are at the same rate, avoiding pressure loss and ensuring the accuracy of fluid flow rate detection. This improves anti-interference performance, significantly reduces the interference of fluid disturbances on the vortex street, and enhances the accuracy of flow measurement. The vibration damping groove can form a counter-rotating secondary vortex street, thereby shearing the main boundary layer, preventing turbulent energy cascading, and reducing turbulent events. The counter-rotating secondary vortex street also optimizes the flow field structure, reducing wake turbulent kinetic energy, improving the stability of the main vortex street separation, and increasing measurement accuracy. Flexible damping components can seal and isolate the vibration of the measuring tube from the support, and longitudinal and transverse damping springs can dampen vibrations in multiple directions, placing the detection head in a mechanical vibration isolation zone and improving signal purity. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a wide-range vortex flow meter with strong anti-interference capabilities;

[0031] Figure 2 This is a cross-sectional schematic diagram of the overall structure of a wide-range vortex flowmeter with strong anti-interference capabilities;

[0032] Figure 3 A schematic diagram of the vortex generator structure of a wide-range vortex flowmeter with strong anti-interference capabilities;

[0033] Figure 4 This is a schematic diagram of the isolation component structure of a wide-range vortex flowmeter with strong anti-interference capabilities.

[0034] Figure 5 This is a schematic diagram of the internal fluid flow state of a wide-range vortex flowmeter with strong anti-interference capabilities.

[0035] Figure 6 This is a schematic diagram of the transmission status of a smart sensor module for a wide-range vortex flowmeter with strong anti-interference capabilities.

[0036] In the diagram: 1. Measuring tube; 2. Stabilizing component; 3. Vortex generator; 4. Support; 5. Measuring gauge; 6. Isolation component; 7. Main vortex street; 8. Secondary vortex street; 21. Contraction tube; 22. Honeycomb disk; 23. Expansion tube; 31. Trapezoidal component; 32. Vortex generator wall; 33. Vibration damping groove; 61. Flexible damping ring; 41. Detection head; 62. Guide column; 63. Sliding disk; 64. Longitudinal damping spring; 65. Flexible ring; 66. Lateral damping spring; Detailed Implementation

[0037] Reference Figures 1-5This invention provides a technical solution: a wide-range vortex flow meter with strong anti-interference capabilities, comprising:

[0038] Measuring tube 1, with a stabilizing component 2 fixed inside its inlet end;

[0039] The vortex generator 3 is vertically fixed inside the measuring tube 1;

[0040] The bracket 4 is installed on the measuring tube 1 using an isolation component 6. A detection head 41 is oscillating inside the bracket 4, and the detection head 41 is located behind the vortex generator 3.

[0041] Measuring gauge 5 is fixed above the bracket 4 and electrically connected to the detection head 41.

[0042] It should be noted that an intelligent sensor module is installed between the detection head 41 and the measuring instrument 5. During use, the intelligent sensor module converts the oscillation of the detection head 41 into an electric charge signal and processes the signal. At the same time, the vibration sensor in the intelligent sensor compensates for the vibration. Then, the electric charge signal is digitally filtered through spectrum analysis and converted into vortex shedding frequency calculation (the specific conversion method is existing and will not be described again). Then, temperature and pressure compensation is performed through the temperature sensor and pressure sensor in the intelligent sensor module, and the calculation results are output and displayed on the measuring instrument 5.

[0043] In this embodiment, the stabilizing component 2 includes:

[0044] The shrink tube 21 is fixed inside the measuring tube 1;

[0045] The honeycomb plate 22 is fixed on the side of the contraction tube 21 near the vortex generator 3;

[0046] The expansion tube 23 is fixed on the side of the honeycomb disk 22 away from the contraction tube 21.

[0047] In a preferred embodiment, the diameter of the contraction tube 21 decreases sequentially from the inlet of the measuring tube 1 toward the honeycomb disk 22, and the diameter of the expansion tube 23 increases sequentially from the honeycomb disk 22 toward the vortex generator 3. Furthermore, the flow rate increase of the fluid by the contraction tube 21 is the same as the flow rate decrease of the fluid by the expansion tube 23.

[0048] In other words, the fluid can be initially accelerated through the contraction tube 21, thereby improving flow stability and suppressing large-scale eddies. Then, a honeycomb rectifier is formed through the honeycomb disk 22 to cut the eddy scale and push the turbulent kinetic energy from the inertial region to the dissipation region. Finally, the flow velocity is restored through the expansion tube 23 to avoid the flow velocity change affecting the flow rate detection.

[0049] In a preferred embodiment, the vortex shedding generator 3 includes:

[0050] Trapezoidal component 31 is fixed inside the measuring tube 1;

[0051] Vortex generating walls 32 are formed on both sides of the trapezoidal member 31;

[0052] Multiple vibration damping grooves 33 are configured and equidistantly opened on the vortex street generating wall 32.

[0053] When the fluid passes through the trapezoidal member 31, it forms a main vortex street 7 and a secondary vortex street 8 through the vibration damping groove 33. The secondary vortex streets 8 formed by the vibration damping groove 33 are all smaller vortex streets. These small vortex streets can shear the mainstream boundary layer, prevent turbulent energy cascade, and reduce the turbulence formed on the vortex street generating wall 32, thereby optimizing the flow field structure and reducing the wake turbulent kinetic energy.

[0054] In a preferred embodiment, the distance between the trapezoidal member 31 and the expansion tube 23 is at least twice the diameter of the measuring tube 1, and the vibration damping groove 33 is arranged perpendicular to the fluid flow direction.

[0055] In other words, by ensuring that the distance between the trapezoidal member 31 and the expansion tube 23 is at least twice the diameter of the measuring tube 1, the flow velocity change zone can be effectively avoided, thereby increasing the accuracy of the measurement.

[0056] In a preferred embodiment, the isolation component 6 includes:

[0057] The flexible damping element 61 is sealed and fixed inside the measuring tube 1, and the bracket 4 is sealed and fixed inside the flexible damping element 61.

[0058] Multiple guide posts 62 are configured and fixed to the outer wall of the measuring tube 1, and the multiple guide posts 62 are arranged circumferentially around the bracket 4 as the axis.

[0059] The sliding disk 63 is slidably disposed on the plurality of guide posts 62 and is coaxially arranged with the bracket;

[0060] A longitudinal damping spring 64 is sleeved on the guide post 62 and located between the sliding disk 63 and the measuring tube 1;

[0061] The flexible ring 65 is slidably sleeved on the outer wall of the bracket 4;

[0062] Multiple transverse damping springs 66 are configured and arranged circumferentially between the flexible ring 65 and the sliding disc 63.

[0063] The flexible damping element 61 can seal and isolate the vibration of the measuring tube 1 from being transmitted to the support 4. The longitudinal damping spring 64 and the transverse damping spring 66 can dampen vibration in multiple directions, thereby placing the detection head 41 in the mechanical vibration isolation zone, improving signal purity and increasing the overall anti-interference capability of the flow meter.

[0064] In a preferred embodiment, the fluid in the measuring tube 1 generates a main vortex street 7 through the trapezoidal member 31, and the main vortex streets 7 on both sides of the trapezoidal member 31 rotate in opposite directions. When the fluid passes through the vibration damping groove 33, a secondary vortex street 8 is generated, and the main vortex street 7 and the secondary vortex street 8 on the same side of the trapezoidal member 31 rotate in opposite directions.

[0065] It should be noted that the secondary vortex street 8 generated when the fluid passes through the damping groove 33 is a small vortex street, which is used to shear the mainstream boundary layer, prevent turbulent energy cascade, and avoid affecting the main vortex street 7.

[0066] In practice, the fluid is first accelerated through the contraction tube 21, causing it to flow towards the honeycomb disk 22. The honeycomb disk 22 then cuts the vortex scale, thereby reducing the formation of turbulence. The flow velocity is then restored through the expansion tube 23, forming a laminar flow field and achieving precise control of the flow velocity. This avoids the influence of turbulent disturbances on the flow velocity. Furthermore, the speed increase of the contraction tube and the speed decrease of the expansion tube are the same, avoiding pressure loss and ensuring the accuracy of fluid flow detection, thus improving anti-interference performance. Finally, the vortex generator 3 generates the main vortex street 7, which orderly moves the detection head, thereby completing the detection of fluid flow.

[0067] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wide-range vortex flow meter with strong anti-interference capabilities, characterized in that, include: The measuring tube (1) has a stabilizing component (2) fixed inside its inlet end; The vortex generator (3) is vertically fixed inside the measuring tube (1); The bracket (4) is installed on the measuring tube (1) using an isolation component (6). A detection head (41) is oscillating inside the bracket (4). The detection head (41) is located behind the vortex generator (3). The measuring instrument (5) is fixed above the bracket (4) and electrically connected to the detection head (41); The stabilizing component (2) includes: The shrink tube (21) is fixed inside the measuring tube (1); The honeycomb plate (22) is fixed on the side of the contraction tube (21) near the vortex generator (3); An expansion tube (23) is fixed to the side of the honeycomb plate (22) away from the contraction tube (21); The diameter of the contraction tube (21) decreases sequentially from the inlet of the measuring tube (1) toward the honeycomb disk (22), and the diameter of the expansion tube (23) increases sequentially from the honeycomb disk (22) toward the vortex generator (3). The flow rate increased by the contraction tube (21) is the same as the flow rate decreased by the expansion tube (23). The vortex shedding generator (3) includes: Trapezoidal component (31) is fixed inside the measuring tube (1); Vortex generating walls (32) are formed on both sides of the trapezoidal member (31); Vibration damping grooves (33) are configured in multiples and are equidistantly opened on the vortex street generating wall (32).

2. A wide range vortex flowmeter with strong anti-interference according to claim 1, characterized in that, The trapezoidal member (31) is at least twice the diameter of the measuring tube (1) from the expansion tube (23), and the vibration damping groove (33) is arranged perpendicular to the fluid flow direction.

3. A wide range vortex flowmeter with high immunity to interference according to claim 2, wherein The isolation component (6) includes: The flexible damping element (61) is sealed and fixed inside the measuring tube (1), and the bracket (4) is sealed and fixed inside the flexible damping element (61); Multiple guide posts (62) are configured and fixed to the outer wall of the measuring tube (1), and the multiple guide posts (62) are arranged circumferentially around the bracket (4); The sliding disk (63) is slidably disposed on the plurality of guide posts (62) and is coaxially arranged with the bracket; A longitudinal damping spring (64) is sleeved on the guide post (62) and located between the sliding disk (63) and the measuring tube (1); A flexible ring (65) is slidably sleeved on the outer wall of the bracket (4); Multiple transverse damping springs (66) are configured and arranged circumferentially between the flexible ring (65) and the sliding disc (63).

4. A wide range vortex flowmeter according to claim 3, wherein, The fluid in the measuring tube (1) generates a main vortex street (7) through the trapezoidal member (31), and the main vortex streets (7) on both sides of the trapezoidal member (31) rotate in opposite directions. When the fluid passes through the vibration damping groove (33), a secondary vortex street (8) is generated. The main vortex street (7) and the secondary vortex street (8) on the same side of the trapezoidal member (31) rotate in opposite directions.

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