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Measuring tube structure of rotor flow meter

A technology of rotameters and measuring tubes, applied in the field of flowmeters, can solve the problems that the balance height of the rotor is not linearly related to the flow rate, and the scale line of the flowmeter is non-linear, so as to improve the linearity and improve the linear relationship. Effect

Inactive Publication Date: 2017-05-31
SHANGHAI AUTOMATION INSTRAION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the conventional design, the shape of the cross-sectional profile of the conical section is a straight line. The shape of the conical section usually cannot satisfy the linear relationship between the balance height of the rotor and the flow rate, resulting in a non-linear scale line of the flowmeter.

Method used

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  • Measuring tube structure of rotor flow meter

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] Such as figure 1 As shown: a rotameter measuring tube structure that can improve the linear relationship, including the measuring tube 1, the rotor 2, the limit bracket 3, the tapered section 4 contained in the measuring tube 1 structure, the diameter of the inlet end is smaller than the diameter of the outlet end , cut the tapered section 4 with a plane passing through the pipeline axis, and the cross-sectional outline of the tapered section 4 is a curve. During design, the proper height of the rotor is obtained according to the flow rate. By adjusting the shape of the cross-sectional curve, the annular gap area can be controlled, thereby changing the force on the rotor to make it reach the proper height. The outlet and inlet of the measuring tube 1 are provided with limit brackets 3, and the axis of the limiting rotor 3 is always collinear wit...

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Abstract

The invention relates to a measuring tube structure of a rotor flow meter. The measuring tube structure comprises a measuring tube, a conical section is arranged in the measuring tube, and the section contour line of the conical section is a curve. The diameter of the inlet end of the measuring tube is smaller than that of the outlet end of the measuring tube. Limiting supports are arranged at the outlet and the inlet of the measuring tube and used for making a rotor and the measuring tube coaxial all the time under the limiting effect. Through improved design of the measuring tube structure, the section shape of the conical section is changed into a curve from a straight line, the linearity of the relation between the balance height of the rotor and the flow can be improved, and thus the linearity of scales can be improved.

Description

technical field [0001] The invention relates to a flowmeter, in particular to a rotor flowmeter with better scale linearity. Background technique [0002] Rotor flowmeter, also known as float flowmeter, is a kind of variable area flowmeter. It is composed of a measuring tube and a rotor (also called float) that is placed in the measuring tube and can move freely up and down. The body of the rotameter can be connected to the measuring pipe with flanges at both ends, threads or hoses, and installed vertically on the measuring pipe. When the fluid flows into the conical tube from bottom to top, it is intercepted by the rotor, so that a pressure difference is generated between the upstream and downstream of the rotor, and the rotor rises under the action of the pressure difference. At this time, there are three forces acting on the rotor: fluid to rotor The dynamic pressure of the rotor (up), the buoyancy of the rotor in the fluid (up) and the weight of the rotor itself (down)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F15/00
CPCG01F15/00
Inventor 黄寅李菲
Owner SHANGHAI AUTOMATION INSTRAION CO LTD