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A flow measuring device

A flow measurement device and a technology of a measurement section, which is applied in the field of flow measurement devices and fluid flow devices, can solve the problems of sensitivity and low measurement accuracy, and achieve the effects of low cost, increased pressure difference, and expanded application range

Active Publication Date: 2018-04-24
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] Purpose of the invention: Aiming at the above prior art, a flow measurement device is proposed to improve the sensitivity of the measurement results of the traditional flowmeter based on the Pitot tube principle to the position of the measurement point and the defects of low measurement accuracy

Method used

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Embodiment Construction

[0013] The present invention will be further explained below in conjunction with the accompanying drawings.

[0014] Such as figure 1 As shown, a flow measurement device includes a diversion section, a measurement section and two reducing pipes. Wherein, the diversion section includes a diversion section pipeline 6 and a plurality of diversion pipes 3, and the plurality of diversion pipes 3 are oblong straight circular cross-section pipes with the same diameter. Several guide tubes 3 are arranged horizontally in the guide section pipeline 6 along the direction of fluid flow, and several guide tubes 3 are evenly arranged, and are fixed in the guide section pipeline 6 by the static friction force generated by mutual extrusion between the tube walls, as shown in FIG. figure 2 shown. The measurement section includes a measurement section pipeline 7, a Pitot tube 4 and a differential pressure gauge 5, the measurement section pipeline 7 has the same diameter as the diversion sect...

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Abstract

The invention discloses a flow measurement device, which mainly comprises a diversion section and a measurement section, wherein a fluid flow pipeline, a diversion section pipeline (6), a measurement section pipeline (7) and a fluid flow pipeline are sequentially from left to right The connection is characterized in that the guide pipe (6) is provided with a guide pipe (3) evenly arranged along the direction of fluid movement, the measuring section has an indirect reading measurement unit, and the measuring components are a pit tube (4) and a pressure difference Meter (5), one end of the pitot tube (4) is placed in the pipeline of the measuring section, the direction of the caliber is opposite to the flow direction of the fluid, and the other end penetrates the circumference of the pipeline of the measuring section vertically upwards and is fixed, and passes through the pipeline of the measuring section (7). ) of the pitot tube (4) is connected to the differential pressure gauge (5). The diversion effect of the present invention can effectively improve the velocity profile of the fluid, make it more uniform, and solve the problem that the measurement of the flowmeter is sensitive to the measurement position. At the same time, the device has low cost, convenient installation and high measurement accuracy.

Description

technical field [0001] The invention relates to a flow measuring device, in particular to a device for measuring the fluid flow of a fluid in a pipeline, and belongs to the technical field of flow detection. Background technique [0002] Flow meters based on the Pitot tube measurement principle are usually used to measure fluid flow in pipelines. When measuring, the diameter of the measuring port of the Pitot tube is directly opposite to the incoming flow, and there is a fluid passage in it that communicates with the upper end of the Pitot tube. The pressure difference at the end can be obtained by the formula Calculate the flow velocity of the fluid in the pipeline, and then obtain the flow rate of the fluid, where CP is the coefficient of the measuring device, and CP is 1 in an ideal state. However, due to the influence of the viscous resistance of the pipe wall, the velocity profile of the fluid in the pipeline is not uniform; and the measurement should generally be ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F1/36
Inventor 钱华刘荔周琦郑晓红张恺
Owner SOUTHEAST UNIV
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