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A large-diameter medium-to-high flow rate flowmeter

A high flow rate, large caliber technology, applied to measuring devices, instruments, etc., can solve problems such as large pressure loss, energy waste, and decreased measurement accuracy, and achieve the effects of reducing pressure loss, improving measurement accuracy, and improving measurement accuracy

Active Publication Date: 2017-06-16
银川融神威自动化仪表厂(有限公司)
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Problems solved by technology

In comparison, the installation method of a brings about the improvement of measurement accuracy, but the corresponding pressure loss becomes relatively large, and the waste of energy is serious. Although the installation method of b reduces the pressure loss, the measurement accuracy is relatively reduced.
For this reason, there is no instrument on the market that can both reduce pressure loss and improve measurement accuracy.

Method used

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  • A large-diameter medium-to-high flow rate flowmeter
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Embodiment Construction

[0014] A kind of medium and high velocity flowmeter of large diameter, it comprises measuring pipeline 3, such as figure 1 and 2 As shown: four rectangular tube generators 5 are arranged in the measuring pipeline 3, and each rectangular tube generator 5 is provided with a positive pressure-taking tube 1 and a negative pressure-taking tube 2, and the positive pressure-taking tubes of the four rectangular tube generators 5 The pipe 1 and the negative pressure-taking pipe 2 are connected through a round pipe 6 .

[0015] The pipe centers of the four rectangular pipe generators 5 are evenly arranged on the iso-annulus of the measuring pipe 5 .

[0016] In the rectangular tube generator 5, α is 45°, β is 14°, and the wedge height H is 0.4D, where D is the inner diameter of the measuring pipe 3. α is the contraction angle of the wedge, β is the divergence angle of the wedge, and H is the height of the wedge, that is, the height of the wedge.

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Abstract

The invention relates to a flow measuring device, in particular, a large-caliber middle-high velocity flow velocity meter. The large-caliber middle-high velocity flow velocity meter comprises a measuring pipeline. The large-caliber middle-high velocity flow velocity meter is characterized in that four rectangular pipe generators are distributed in the measuring pipeline; each rectangular pipe generator is provided with a positive pressure tapping pipe and a negative pressure tapping pipe; and the positive pressure tapping pipes and the negative pressure tapping pipes of the four rectangular pipe generators are connected together through a circular pipe. The large-caliber middle-high velocity flow velocity meter of the invention is unique in structure. With the large-caliber middle-high velocity flow velocity meter adopted, pressure loss can be reduced, and measurement accuracy can be improved, and installation and maintenance can be facilitated.

Description

technical field [0001] The invention relates to a flow measuring device, in particular to a medium-to-high flow rate flowmeter with a large diameter. Background technique [0002] In the field of current differential pressure instrument flow measurement, in the case of large diameter and high flow rate, there are generally two main installation methods; a: flowmeters that are welded to pipes or flanged to cover the entire pipe, such as hyperboloids Balance flowmeter application number: CN200910265096, application date: 2009.12.31, publication (announcement) number: CN101750121A, applicant (patent owner): Shanghai Keyang Technology Development Co., Ltd., inventor: Zhou Ren). b: Open a hole on the pipe wall and insert it into the pipe, such as a built-in combined Venturi nozzle throttling mechanism: application number: CN20100547011, application date: 2010.11.17, publication (announcement) number: CN102042853A, applicant: Xi'an Zhongwang Flow Instrument Co., Ltd., inventor: X...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
Inventor 唐力南李舸景兆才
Owner 银川融神威自动化仪表厂(有限公司)
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