Olive-shaped differential pressure flow meter

Abstract

The invention discloses an olive-shaped differential pressure flow meter which comprises a measuring tube, flanges connected to the two ends of the measuring tube respectively, a restricting element arranged in the measuring tube, a high-pressure tube and a low-pressure tube. The high-pressure tube and the low-pressure tube are separately arranged on the wall of the measuring tube in a front-and-back mode. The olive-shaped differential pressure flow meter is characterized in that the restricting element is composed of a middle cylinder and image rotators tangent to the outer circle of the left end and the outer circle of the right end of the cylinder respectively, wherein the arc of each image rotator serves as a generatrix; at least two guiding sheets are further respectively and evenly arranged on the circumference of the left end and the circumference of the right end of the restricting element. Due to the fact that the olive-shaped restricting element is adopted, the olive-shaped differential pressure flow meter has the advantages that the resistance of fluid to be measured is reduced, the permanent pressure loss of the fluid is reduced, and the olive-shaped differential pressure flow meter is not prone to dirt accumulation and abrasion. In addition, due to the fact that stable static pressure can be obtained through flowing in an annular channel, the measuring accuracy of the flow meter can be improved.

Description

technical field [0001] The invention belongs to the technical field of pipeline fluid flow measurement, and relates to a fluid flow measurement instrument, in particular to a novel olive-shaped differential pressure flowmeter. Background technique [0002] A differential pressure flowmeter is an instrument that measures flow based on the differential pressure generated by the flow detection device installed in the pipeline, known fluid conditions, and the geometric dimensions of the detection device and the pipeline. The differential pressure flowmeter with a throttling device as the detection part is the most widely used type of flowmeter, which is called a throttling differential pressure flowmeter. It consists of three parts: throttling device, differential pressure transmitter and flow indicator, and can also be composed of throttling device and differential pressure gauge. [0003] The patent notification number is a utility model patent of CN2736741Y, which discloses ...

AI Technical Summary

Problems solved by technology

It can be seen that although the relative pressure loss of the spindle flowmeter is much smaller than that of the orifice flowmeter, the relative pressure loss ratio of the spindle flowmeter still has some defects that need to be further reduced and improved.

Images