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Fluid measuring device

A fluid measurement and throttling device technology, which is applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. Guarantee, flow measurement accuracy decline and other issues, to achieve the effect of saving verification costs, extending the verification period and reducing wear and tear

Pending Publication Date: 2016-11-09
CHENGDU NANFANG ELECTRONICS METER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the historical limitations of the design, the traditional throttling device represented by the orifice plate obviously has the following disadvantages: (1) The orifice plate uses the acute angle line of the inner hole to ensure the accuracy, so that the device is resistant to corrosion, wear, scaling, and dirt. Sensitive to pollution, long-term use accuracy is difficult to guarantee, and it needs to be dismantled and inspected once a year; (2) The previous differential pressure flowmeter has high requirements for straight pipe sections, and there are often insufficient straight pipe sections in the layout of large pipelines and narrow space pipe networks (3) In the traditional differential pressure flowmeter measurement system, the fluid continuously scours the throttling parts, which makes the orifice plate wear and the service life is short

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 , figure 2 and image 3 A fluid measuring device shown includes: a straight pipe section 1, a flow regulator is arranged in the straight pipe section 1, and the straight pipe section 1 is divided into a pipe A and a pipe B. The above-mentioned pipe A and pipe B are the front The front and rear pipes are determined by the flow direction of the fluid. The fluid passes through the front pipe first, and the rear pipe passes through it later, so it cannot be absolutely determined which is the front pipe and which is the rear pipe. A throttling device is provided between pipe A and pipe B, and the straight pipe section 1 and / or the throttling device is also connected with a signal acquisition device, wherein the throttling device is provided with a number of throttling holes 2, and through the throttling holes 2, the pipe A is connected to pipe B. In this embodiment, a throttling hole 2 is set at the center of the throttling device, and other throttling ho...

Embodiment 2

[0032] Such as Figure 4 As shown, compared with Embodiment 1, the structure of the orifice 2 in this embodiment is specifically the horn hole section 201 - the straight hole section 202 - the horn hole section 201, and the larger diameter ends of the horn hole section 201 are all facing outward. The positive pressure port 302 of the differential pressure transmitter is connected to the throttling device, and the negative pressure port 301 is connected to the straight pipe section 1 . When this arrangement is adopted, the device described in this embodiment can measure bidirectional fluids, and has strong applicability.

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Abstract

The invention discloses a fluid measuring device which comprises straight pipe sections. Flow regulators are arranged in the straight pipe sections, the straight pipe sections are divided into pipes A and pipes B, throttle devices are arranged between the pipes A and the pipes B, signal acquisition devices are further connected with the straight pipe sections and / or the throttle devices, and a plurality of throttle holes are formed in the throttle devices, so that the pipes A can be communicated with the pipes B. The throttle holes comprise straight hole sections and flared hole sections, the caliber of an end of each flared hole section is larger than that of the other end of the flared hole section, each straight hole section is communicated with one end of the corresponding flared hole section, and the caliber of the end of each flared hole section is smaller than that of the other end of the flared hole section. The fluid measuring device has the advantages that the throttle holes comprise the straight hole sections and the flared hole sections, accordingly, the problem that existing devices are sensitive to corrosion, abrasion, scaling and smudginess due to internal acute angle lines of the traditional plate holes can be solved, and the measurement accuracy still can be guaranteed after the fluid measuring device is used for a long time.

Description

technical field [0001] The invention relates to the field of flow measurement, in particular to a fluid measurement device. Background technique [0002] The traditional differential pressure throttling device has a long history, simple structure, firmness, stable and reliable performance, and has been recognized by the International Organization for Standardization, which is universal in the world. : Orifice Plates, Nozzles, and Venturi Tubes Installed in Fluid-Filled Pipes of Circular Section. In terms of the number of uses, differential pressure flowmeters account for more than half of the share, and the application range is extremely wide, including all single-phase fluids (liquid, gas, steam), part of mixed-phase flow, pipe diameters, working conditions (temperature) in the general production process , pressure) are all useful, and the throttling device and differential pressure display instrument have achieved professional scale production, on-site maintenance and rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/36G01F1/42
CPCG01F1/36G01F1/42
Inventor 范连军黄金义刘聪熊凯余智明
Owner CHENGDU NANFANG ELECTRONICS METER CO LTD