A compound vortex generator
A technology of generating body and vortex street, which is applied in the direction of volume/mass flow generated by mechanical effect, and through detecting the dynamic effect of fluid flow, etc., can solve the problem of inability to guarantee the length of the straight pipe section upstream and downstream of the flowmeter, the vortex intensity fluctuates violently, and the loss of measurement Accuracy and other issues, to achieve the effect of improving the adaptability of field working conditions and measurement accuracy, vortex stability, and improving stability
Active Publication Date: 2011-12-21
JIANGSU WEIYI ELECTRONICS
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However, under field conditions, since the inner diameter of the flow pipe of the flowmeter cannot be completely consistent with the inner diameter of the pipe, the axis of the flow pipe of the flowmeter cannot completely overlap the axis of the pipe, and the length of the upstream and downstream straight pipe sections required by the flowmeter cannot be guaranteed under field conditions. , so it shows that the vortex intensity fluctuates violently, exceeding the hysteresis zone of the Schmidt trigger, resulting in leaky waves, and error fluctuations of ±30% or more, and the error value is uncertain and cannot be corrected, making the measurement lose accuracy
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[0014] A compound vortex generating body, including a vortex generating body 1 and a stall body 2, the V-shaped structure stall body 2 and the vortex generating body 1 are placed on both sides of the vortex sensor 4 at intervals, and the V-shaped opening faces away from the vortex generating body 1. The central axis of the V-shaped stall body 2 is on the same level as the center of the vortex street generator 1. The V-shaped opening angle of the stall body is designed to be 85±5°, and the best design is 85±2°. The V-shaped stall body 2 The distance between the head and the center of the vortex generator 1 is 0.152 times the inner diameter of the flowmeter flow pipe 3 using the composite vortex generator, and the vertical distance from the head to the tail of the V-shaped stall body 2 is 0.1245 times the inner diameter of the flowmeter flow pipe 3 of the generating body.
[0015] For example, if the composite vortex generator is installed in a DN200 full-pipe vortex flowmet...
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The invention relates to a composite vortex street generating body, and belongs to the technical field of fluid measuring equipment. The composite vortex street generating body comprises a vortex street generating body and a baffle body, wherein the baffle body with a V-shaped structure and the vortex street generating body are arranged at intervals; a V-shaped opening of the baffle body is back to the vortex street generating body; and the central axis of the V-shaped baffle body and the center of the vortex street generating body are positioned on the same horizontal plane. The composite vortex street generating body can effectively improve the stability of vortexes generated by a single generating body vortex street flowmeter under the complicated site working condition, avoids the phenomenon of wave leakage, and obviously improves the site working condition adaptability and measuring accuracy of the single generating body vortex street flowmeter.
Description
technical field [0001] The invention belongs to the technical field of fluid measuring equipment, and in particular refers to a composite vortex generator capable of improving vortex stability, improving the on-site working condition adaptability of a vortex flowmeter, and improving measurement accuracy. Background technique [0002] At present, the traditional vortex flowmeter using a single vortex generator has a simple structure and strong vortex. The proportional coefficient between the vortex frequency and the fluid flow rate is determined, and it has excellent linearity, so it is easier to obtain on the calibration device. ±0.5% accuracy class. However, under field conditions, since the inner diameter of the flow pipe of the flowmeter cannot be completely consistent with the inner diameter of the pipe, the axis of the flow pipe of the flowmeter cannot completely overlap the axis of the pipe, and the length of the upstream and downstream straight pipe sections required ...
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IPC IPC(8): G01F1/32
Inventor 唐贤昭
Owner JIANGSU WEIYI ELECTRONICS