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Venturi pipe flow measuring device and mounting method

A Venturi tube, flow measurement technology, applied in the volume/mass flow generated by mechanical effects, and the detection of fluid flow by measuring pressure difference, can solve the problems of high manufacturing cost, fluid leakage, complex process, etc., to reduce production costs , The effect of reducing pressure loss and reducing processing difficulty

Active Publication Date: 2018-09-28
江阴市节流装置厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the constriction section and throat of the standard Venturi tube are usually machined and welded. During use, the weld is likely to cause fluid leakage and damage.
Venturi tubes that require high machining accuracy are generally processed by CNC machine tools, which is complicated in process and high in manufacturing costs. For the large amount of Venturi tube flow measurement devices, it is necessary to find a simple and low-cost processing method, and Easy to install and use

Method used

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  • Venturi pipe flow measuring device and mounting method

Examples

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Effect test

Embodiment 1

[0020] A Venturi tube flow measurement device, the flow measurement device includes an inlet cylinder section 1, a conical constriction section 2, a cylinder throat section 3 and a conical divergence section 4 arranged in sequence, on the inlet cylinder section 1 along There are positive pressure-taking holes 5 in the radial direction, and negative pressure-taking ports 6 are arranged in the radial direction in the cylindrical throat section 3, and the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the conical diffuser section 4 are integrated Molded casting, the outer diameter of the two ports of the conical constriction section 2 of the Venturi tube and the conical diffusion section 4 are adapted to the inner diameter of the inlet circular pipe section 1; the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the The section of the conical diffuser section 4 is a hyperbola, and the two ends of the...

Embodiment 2

[0023] A Venturi tube flow measurement device, the flow measurement device includes an inlet cylinder section 1, a conical constriction section 2, a cylinder throat section 3 and a conical divergence section 4 arranged in sequence, on the inlet cylinder section 1 along There are positive pressure-taking holes 5 in the radial direction, and negative pressure-taking ports 6 are arranged in the radial direction in the cylindrical throat section 3, and the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the conical diffuser section 4 are integrated Molded injection molded parts, the outer diameter of the two ports of the conical constriction section 2 and the conical diffusion section 4 of the Venturi tube are adapted to the inner diameter of the inlet circular pipe section 1; the conical constriction section 2 of the Venturi tube and the cylindrical throat section 3 The cross-section of the conical diverging section 4 is a hyperbola, and th...

Embodiment 3

[0026] A Venturi tube flow measurement device, the flow measurement device includes an inlet cylinder section 1, a conical constriction section 2, a cylinder throat section 3 and a conical divergence section 4 arranged in sequence, on the inlet cylinder section 1 along There are positive pressure-taking holes 5 in the radial direction, and negative pressure-taking ports 6 are arranged in the radial direction in the cylindrical throat section 3, and the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the conical diffuser section 4 are integrated Molded injection molded parts, the outer diameter of the two ports of the conical constriction section 2 and the conical diffusion section 4 of the Venturi tube are adapted to the inner diameter of the inlet circular pipe section 1; the conical constriction section 2 of the Venturi tube and the cylindrical throat section 3 The cross-section of the conical diffuser section 4 is a hyperbola, and the...

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Abstract

The invention discloses a Venturi pipe flow measuring device and a mounting method. The flow measuring device comprises a cylindrical inlet section, a conical contraction section, a cylindrical throatpipe section and a conical diffusion section which are arranged in sequence, wherein a positive pressure tapping hole is formed in the cylindrical inlet section in the radial direction, a negative pressure tapping hole is formed in the cylindrical throat pipe section in the radial direction, the conical contraction section, the cylindrical throat pipe section and the conical diffusion section ofa Venturi pipe constitute an integrally formed casting, and the outer pipe diameter of two ports of the conical contraction section and the conical diffusion section of the Venturi pipe is matched with the inner pipe diameter of the cylindrical inlet section; profiles of the conical contraction section, the cylindrical throat pipe section and the conical diffusion section of the Venturi pipe are hyperbolic curves, and positioning pieces are arranged at the two ends of the conical contraction section and the conical diffusion section of the Venturi pipe respectively. The Venturi pipe flow measuring device is simple in processing, convenient to mount and low in processing and manufacturing cost and can meet the requirement of engineering surveying.

Description

technical field [0001] The invention relates to the field of throttling devices, in particular to a Venturi tube flow measuring device and a method for installing the Venturi tube into a measuring tube. Background technique [0002] The principle of the Venturi tube flow measurement device is to place a throttling part with a flow area smaller than the cross-sectional area of ​​the pipe in a pipe filled with fluid. When the flow in the pipe passes through the throttling part, it will cause local contraction, and the flow velocity will increase at the constriction. , the static pressure decreases, there will be a certain pressure difference before and after the throttling piece, there is a certain functional relationship between the differential pressure before and after the throttling piece and the flow rate, and the flow rate can be determined by measuring the differential pressure before and after the throttling piece. Common throttling parts include standard orifice plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/44
CPCG01F1/44
Inventor 王费许丽霞刘丽敏金健黄晨辉
Owner 江阴市节流装置厂有限公司
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