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Large caliber vortex shedding flowmeter

A vortex flowmeter, large-diameter technology, applied in the direction of volume/mass flow generated by mechanical effects, dynamic effects by detecting fluid flow, etc., can solve the problems of low detection accuracy and poor signal, and achieve high measurement accuracy and frequency. High and low cost of installation and removal

Active Publication Date: 2009-01-21
上海星空自动化仪表有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a large-diameter vortex flowmeter to solve the shortcomings of the existing large-diameter vortex flowmeters such as low detection accuracy and poor signal

Method used

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Embodiment Construction

[0023] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0024] figure 2 It is a schematic diagram of the general structure of an existing vortex flowmeter, mainly composed of a small measuring tube 3, a triangular cylinder 5, a detection probe 4, a signal processing converter 1, and a signal line 2 connected to the signal processing converter 1, etc.

[0025] see Figure 3-1 and Figure 3-2 The vortex flowmeter comprises a large-bore measuring tube 15 and a small-bore vortex flowmeter, and the small-bore vortex flowmeter is inserted into the large-bore measuring tube 15. The specific installation method is to connect the connecting flange 12 of the small-diameter vortex flowmeter with the connecting flange 14 of the large-diameter measuring tube through bolts and nuts.

[0026] In order to prevent ...

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Abstract

A large-caliber vortex follow meter comprises a large-caliber measuring tube and a small-caliber magneto-electric vortex follow meter, which is characterized in that the small-caliber magneto-electric vortex follow meter is inserted in the large-caliber measuring tube, wherein the caliber of the large-caliber measuring tube can be up to DN600, even be much larger. Compared with an original vortex follow meter under the same caliber and the same flow velocity, the invention can release higher frequency and stronger signals, namely that the novel flow meter has the advantages of high measuring precision, low measuring lower limit and short length of straight tube sections installed back and forth. And the core portion of a small-caliber sensor can return the factory or the monitoring management office at the premise that measuring tubes with the same specification are ensured to exchange (the measuring tube for the detection is consistent with user measuring pipes) under the condition of guaranteeing the installation direction of the small-caliber sensor consistent, and the problem that the magneto-electric vortex follow meter is difficult to deliver to be detected is solved, and the installation and detachment costs in detection is greatly reduced.

Description

technical field [0001] The invention relates to a vortex flowmeter, in particular to a new large-diameter vortex flowmeter designed using the "Karman" vortex principle and used to measure the mass flow and volume flow of steam, gas and liquid media in closed pipelines. Background technique [0002] The working principle of the vortex flowmeter is that when the medium flows through the triangular cylinder 5 at a certain speed in a closed pipeline, an alternately arranged vortex belt is generated behind both sides of the triangular cylinder 5, which is called "Karman vortex". function, so that the detection probe 4 generates alternating stress, and the piezoelectric element packaged in the detection probe 4 generates an alternating charge signal with the same frequency as the vortex under the action of the alternating stress, and sends it to the converter 1 through the cable 2 After intelligent processing, the display of instantaneous flow and cumulative flow of steam, gas and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/32
Inventor 鲁金祥
Owner 上海星空自动化仪表有限公司
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