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Gas spray pipe flow measuring device capable of online calibration

A flow measurement device, gas technology, applied in the direction of measurement device, test/calibration device, liquid/fluid solid measurement, etc.

Active Publication Date: 2016-08-17
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of real-flow online calibration of gas flowmeters, and proposes a laser Doppler flow meter (LDV)-based on-line calibrated jet tube flow measurement device for measuring gas flow in closed pipelines. Measurement

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  • Gas spray pipe flow measuring device capable of online calibration
  • Gas spray pipe flow measuring device capable of online calibration
  • Gas spray pipe flow measuring device capable of online calibration

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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following description is only for the convenience of explaining the present invention, not as a specific limitation on its scope.

[0020] figure 1 Shown is a schematic structural view of the nozzle flow measuring device of the present invention. The measuring device comprises a first pipe section 1, a second pipe section 10 and a third pipe section 9, wherein the first pipe section 1 and the second pipe section 10 are connected by bolts, and the second pipe section 10 and the third pipe section 9 are connected by bolts. Bolt connection can also be used, and the first pipe section 1 , the second pipe section 10 and the third pipe section 9 can be connected not only by bolts, but also by other connection methods.

[0021] Such as figure 1 The...

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Abstract

The invention relates to a gas spray pipe flow measuring device capable of online calibration, comprising: a pipe segment for passage of gas; a spray pipe mounted in the pipe segment and having a first port and a second port; a differential pressure transmitter measuring a pressure difference between the first port and second port of the spray pipe; the device is characterized in that the pipe segment is provided with a transparent window, projection of the transparent window on a pipe wall covers projection of the second port of the spray pipe on the pipe wall; a laser Doppler flow rate meter is disposed outside the pipe segment, and laser emitted by the Doppler flow rate meter passes through the transparent window and measures flow rate at the second port of the spray pipe. The spray pipe flow measuring device can run reliably and measure accurately, and a calibration method has a clear process and is convenient to operate.

Description

technical field [0001] The invention relates to a flow measuring device for a gas spray tube, in particular to a flow measuring device for a spray tube which performs on-line calibration of the flow rate based on a laser Doppler flow meter. Background technique [0002] Gas flow measurement has a wide range of needs and applications in energy, environment, manufacturing and other fields. For example, the storage and transportation of natural gas, the discharge of combustion exhaust gas in power plants, and the air supply of blast furnace steelmaking in steel mills all require the measurement of gas flow. There are many types of gas flowmeters, including turbine flowmeters, ultrasonic flowmeters, differential pressure flowmeters, etc. The flowmeter needs to be calibrated periodically in order to obtain accurate measurement results and meet the requirements of on-site flow measurement. Under the existing calibration mode and conditions, the user needs to disassemble the flow...

Claims

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Application Information

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IPC IPC(8): G01F1/66G01F25/00
CPCG01F1/661G01F1/663G01F25/15
Inventor 崔骊水王池李春辉邱丽荣
Owner NAT INST OF METROLOGY CHINA
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