Vortex street meter body structure for small-aperture pipeline flow measurement

Abstract

A vortex meter body structure used for flow measurement of small-diameter pipelines belongs to the technical field of flow measurement equipment, including a generator and a mounting seat; , The upper cylinder and the triangular cylinder are combined. The flange is provided with probe mounting holes and meter body mounting holes. The meter body mounting holes are evenly distributed around the center of the flange. The probe mounting holes are set away from the center of the flange. The probe installation hole is arranged downstream of the triangular cylinder. When the signal acquisition part fails or fails, the present invention does not need to stop the pipeline operation for a long time, only needs to remove the probe part and replace it with an identical part, and the whole meter can work, which has little influence on the process and has the advantages of It has extremely high interchangeability requirements and is extremely convenient to replace. It can quickly and comprehensively detect on the same standard pipe section. The key is that it meets the flow measurement of small-diameter pipes, and the work efficiency has been greatly improved.

Description

technical field [0001] The invention belongs to the technical field of flow measurement equipment, and relates to a vortex street surface body structure, in particular to a vortex street surface body structure used for flow measurement of small-diameter pipelines. Background technique [0002] The vortex flowmeter is researched and produced according to the principle of Karman vortex street, and it is mainly used for the flow measurement of industrial pipeline media fluids, such as gas, liquid, steam and other media. It is characterized by small pressure loss, large measuring range and high precision. When a cylinder with a non-streamlined section is inserted into the flowing fluid, two rows of staggered vortices will be generated on both sides of the rear of the cylinder. The signal detection element measures the separation frequency of the vortex, and then extracts, amplifies and The fluid flow velocity and instantaneous flow can be measured through analysis and processin...

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Problems solved by technology

[0003] The installation structure and use process of the existing vortex flowmeter mainly have the following deficiencies: the triangular column and the meter body are welded together, the detection element is inserted in the triangular column or downstream of the triangular column, and is fixed on the meter body by screws and must be inside External isolation needs to prevent the medium from leaking out; once the vortex flowmeter is installed on the pipeline, it must be dismantled from the pipeline as a whole once abnormal characteristics appear or when it comes to regular inspection, the workload is relatively large, and the offline time is also relatively long , which has a relatively large impact on production

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