Differential-pressure linear flowmeter

A flowmeter, linear technology, applied in the field of differential pressure linear flowmeter, can solve the problems of large volume, large flow resistance, easy blockage, etc., achieve high measurement accuracy, wide measurement range, and eliminate the effect of easy blockage

Inactive Publication Date: 2016-09-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the laminar flowmeter in the prior art, such as large volume, large flow resistance and easy blockage, the present invention proposes a differential pressure linear flowmeter

Method used

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Embodiment Construction

[0023] This embodiment is a differential pressure linear flow meter for measuring air volume flow in an air duct.

[0024] This embodiment includes a filter 2 and a measuring device 19. The filter 2 filters and removes impurities in the fluid to be measured, and the measuring device 19 measures the flow of the fluid to be measured.

[0025] The filter 2 is located at one end of the measuring device 19 and is connected by a flange.

[0026] The filter 2 includes a filter pipe section 3, a filter screen 4, a sewage container 21, a sewage collection pipe 25, a sewage collection pipe valve 24, a sewage discharge pipe 22, a sewage discharge pipe valve 23, a filter front flange 1 and a filter rear flange 5. The pipe length of the filter pipe section 3 is 250 mm, and the inner diameter of the pipe is 60 mm, which is the same as the outer diameter of the external pipe of the fluid flow to be measured. Both ends of the filter pipe section 3 are respectively provided with a filter fro...

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Abstract

Provided is a differential-pressure linear flowmeter. A filter is fixed at one end of a measurer. A filter screen in the filter is obliquely arranged between an inlet end and an outlet end of a filter pipe section. Two ends of a bypass pipe of the measurer communicate with a main pipe and enable the direction of fluid in the bypass pipe to be the same as that in the main pipe. Two ends of a pressure-drawing pipe communicate with the bypass pipe. A differential gage is installed in the middle of the pressure-drawing pipe. An inlet temperature gage and an outlet temperature gage are respectively located at a fluid inlet end and a fluid outlet end of the bypass pipe. A laminar flow component is fixed into the bypass pipe through a positioning clip and located between a fluid inlet end and a fluid outlet of the pressure-drawing pipe. The laminar flow component is internally provided with an outer rim micro channel, a clearance micro channel and an inter-pipe micro channel along an axial direction. The differential-pressure linear flowmeter has following beneficial effects: the application scope of a laminar flowmeter is broadened and reliability and Durability are improved; and defects such as large size, great flow resistance and obstruction of the laminar flowmeter are solved.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a differential pressure linear flowmeter. Background technique [0002] A flow meter is an instrument that measures flow. There are many types of flowmeters, among which differential pressure flowmeter is a widely used and traditional type of flowmeter, which obtains the flow rate of the pipeline to be measured by measuring the differential pressure at both ends of the flow measuring element, such as orifice flowmeter, Venturi flowmeter , Nozzle flowmeter, elbow flowmeter, wedge flowmeter, V cone flowmeter, etc. The advantages of the differential pressure flowmeter are stable measurement and high pressure and high temperature resistance, but the disadvantages are the large pressure loss of the fluid, the low measurement accuracy, and the small flow measurement range, which is only 4-8 times. It has been found that: when the fluid flowing through the measuring element is in a lam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34
CPCG01F1/34
Inventor 李世武
Owner NORTHWESTERN POLYTECHNICAL UNIV
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