High-online diffusing pipe double rectangular flowmeter

A rectangular flowmeter and diffusion tube technology, which is applied to the volume/mass flow generated by mechanical effects, and the direction of fluid flow detection by measuring differential pressure. Unique, Accurate and Stable Effects

Inactive Publication Date: 2015-11-11
银川融神威自动化仪表厂(有限公司)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, to provide a kind of high online linear diffusion tube double rectangular flow rate with unique structure, which solves the problem of measurement accuracy and narrow range range, and solves the problem of measurement accuracy at low Reynolds number. count

Method used

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  • High-online diffusing pipe double rectangular flowmeter

Examples

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Effect test

Embodiment 1

[0020] Embodiment one: a kind of double rectangular flowmeter of high linear diffusion tube, it comprises measuring pipeline 5, such as figure 1 with 2 As shown: two inverted trapezoidal throttling parts 6 are distributed symmetrically with the central axis in the measuring pipeline 5, the positive pressure-taking pipe 1 fits on the measuring pipe 5, and the negative pressure-taking pipe 2 fits on the two inverted trapezoidal Between the throttling parts 6.

[0021] The cross-sectional shape of the inverted trapezoidal throttling member 6 is circular, and the front projection is an inverted trapezoid with a large top and a small bottom.

[0022] The front part of the trapezoidal throttling part is the angle α variable diameter section, and the rear part is the angle β expansion section, α and β are 135° and 165° respectively, the vertical distance H between the contraction sections is 0.6D, and the horizontal distance L1 of the contraction section is is 1D, and D is the diam...

Embodiment 2

[0027] Embodiment two: a kind of high online linear diffusion tube double rectangular flowmeter, it comprises measuring pipeline 5, such as image 3 with 4 As shown: In the measuring pipeline 1, two inverted trapezoidal throttling parts 6 are distributed symmetrically with the central axis. Between the throttling parts 6.

[0028] The cross-sectional shape of the inverted trapezoidal throttling member 6 is circular, and the front projection is an inverted trapezoid with a large top and a small bottom.

[0029] The front part of the trapezoidal throttling part is the angle α variable diameter section, and the rear part is the angle β expansion section, α and β are 135° and 165° respectively, the vertical distance H between the contraction sections is 0.6D, and the horizontal distance L1 of the contraction section is is 1D, and D is the diameter of the measuring pipe 1 .

[0030] The negative pressure-taking tube 2 fits in the center of the throat of the trapezoidal throttlin...

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Abstract

The invention relates to a flow measuring device, in particular to a high-online diffusing pipe double rectangular flowmeter which comprises a measuring pipeline. The high-online diffusing pipe double rectangular flowmeter is characterized in that two inverted-trapezoidal throttling elements are symmetrically distributed in the measuring pipeline about a central axis, a positive pressure sampling pipe is arranged on the measuring pipeline in a matched mode, and a negative pressure sampling pipe is arranged between the inverted-trapezoidal throttling elements in a matched mode. According to the high-online diffusing pipe double rectangular flowmeter, the structure is unique, the problems that the measuring precision is low and the measuring range is narrow are solved, and the problem of the measuring precision under the low reynolds number is solved.

Description

technical field [0001] The invention relates to a flow measuring device, in particular to a double rectangular flow meter with a high linear diffusion tube. Background technique [0002] In the current field of differential pressure instrument flow measurement, there are mainly diffused tube rectangular flowmeters. Application date: 2014.06.05, publication (announcement) number: CN104017853A, applicant (patent) person: Tang Linan, inventor: Tang Linan and a Rectangular flowmeter application date: 2014.12.08, publication (announcement) number: CN104501884A, applicant: Shanghai Keyang Technology Co., Ltd., inventors: Zhou Ren, Wang Zhan, Lu Zhiguo, Zhang Junjie, Li Yuanman, the emergence of these two instruments Both are flow meters with inverted trapezoidal throttling parts and rectangular rectangular wedges as throttling elements, because the pressure-taking points of the above two instruments are all at the place with the largest throttling area, where the fluid flow rate i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/36
Inventor 唐力南郝喜强李文亮
Owner 银川融神威自动化仪表厂(有限公司)
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