Vibration sensor and in-line measuring device comprising said sensor

Abstract

The invention relates to a vibration sensor and an in-line measuring device comprising said sensor. The sensor serves to detect at least one physical measurable variable of a flowable medium guided in a tube conduit and / or for producing Coriolis forces which serve to detect the mass flow rate of a flowable medium guided in a tube conduit. The sensor comprises a sensor housing (71), a housing end on the inlet side being defined by a splitter (201) on the inlet side which has exactly four respective interspaced flow openings (201A, 201B, 201C, 201D) and a housing end on the outlet side being defined by a splitter (202) on the outlet side which has exactly four respective interspaced flow openings (202A, 202B, 202C, 202D), and exactly four straight measuring tubes (181, 182, 183, 184) for guiding the flowing medium which tubes are connected to the splitters (201, 202) to give fluidically parallel flow paths. The respective measuring tube end on the inlet side of each of the four measuring tubes leads to one of the flow openings (201A, 201B, 201C, 201D) of the splitter (201) on the inlet side and the respective measuring tube end on the outlet side leads to one of the flow openings (202A, 202B, 202C, 202D) of the splitter (202) on the outlet side. The sensor further comprises an electro-mechanical exciter arrangement (5) for producing and / or maintaining mechanical vibrations of the four measuring tubes (181, 182, 183, 184), the exciter arrangement being designed such that it can be used to excite the paired measuring tubes to perform respective counter-phase flexural vibrations in a respective common imaginary plane of vibration (XZ1, XZ2). The sensor according to the invention is especially suitable for measuring a density and / or a mass flow rate of a medium which flows at least temporarily inside a tube conduit at a mass flow rate of more than 2200 t / h.

Description

technical field [0001] The invention relates to a measuring transducer of the vibrating type for measuring flowable media, in particular gases, liquids, powders or other flowable materials, which are guided in pipes, in particular for measuring at least sometimes The density and / or the mass flow of the medium flowing in the pipeline with a mass flow of 2200 t / h, in particular greater than 2500 t / h, is in particular also used to measure the mass flow accumulated over a certain time interval. In addition, the invention relates to an in-line measuring device with such a measuring transducer. Background technique [0002] In process measurement and automation technology for measuring physical parameters such as mass flow, density and / or viscosity of media flowing in pipelines, on-line measuring devices are often used which utilize vibration-type measuring transducers through which the media flows. The transducer, and the measuring and operating circuits connected thereto, gener...

AI Technical Summary

Problems solved by technology

According to the prior art, in particular according to EP-A 1 001 254, EP-A 553 939, US-A 4,793,191, US-A 2002 / 0157479, US-A 2007 / 0151368, US-A 5,370,002, US-A 5,796,011, In the case of correspondingly scaled-up measurement transducer designs known from US-B 6,308,580, US-B 6,711,958, US-B 7,134,347, US-B 7,350,421 or WO-A 03 / 027616, this leads to the fact that , that is, the geometrical dimensions (in particular the installation length corresponding to the distance between the sealing faces of the two flanges and, in the case of curved measuring tubes, the maximum lateral extension of the measuring transducer) will be too large, especially is the dimension for desired oscillation characteristics, required load carrying capacity, and maximum allowable pressure loss

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