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Venturi tube flow measuring device and installation method

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

Active Publication Date: 2021-01-26
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 tube flow measuring device and installation method

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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 castings, the outer diameters 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 cylindrical 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 the two ends of t...

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 Injection molded parts, the outer diameters 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 cylindrical section 1; the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the conical diffuser section 4 are hyperbolic in section, and the two ends of the ...

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 Injection molded parts, the outer diameters 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 cylindrical section 1; the conical constriction section 2 of the Venturi tube, the cylindrical throat section 3 and the conical diffuser section 4 are hyperbolic in section, and the integrated casti...

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Abstract

The invention discloses a Venturi tube flow measurement device and an installation method. The flow measurement device includes an inlet cylinder section, a conical constriction section, a cylinder throat section and a conical divergence section arranged in sequence. There are positive pressure-taking holes in the radial direction on the top, and negative pressure-taking ports in the radial direction on the cylindrical throat section. The conical constriction section of the Venturi tube, the cylindrical throat section and the conical diffusion section are integrally formed castings. The external pipe diameters of the two ports of the Venturi tube conical contraction section and the conical diffuser section are adapted to the inner diameter of the inlet circular tube section; the profiles of the Venturi tube conical contraction section, the cylindrical throat section and the conical diffuser section are hyperbolic, The two ends of the conical constriction section and the conical divergence section of the Venturi tube are respectively provided with positioning pieces. The Venturi tube measuring device is simple in processing, convenient in installation, low in manufacturing cost, and can meet the needs of engineering measurement.

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 Patents(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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