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Full-automatic supersonic nozzle high flow standard device

A technology of sonic nozzle and standard device, which is used in measurement devices, test/calibration devices, liquid/fluid solid measurement, etc. Speed, the effect of improving system accuracy

Inactive Publication Date: 2014-12-17
NINGXIA JIAXIANG AUTOMATIC CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the standard device of the large-flow sonic nozzle in the domestic market can only measure 2700m at most 3 / h small flow, inconvenient operation, low precision, can no longer meet the requirements of the development of petroleum and chemical large flow instrument products

Method used

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  • Full-automatic supersonic nozzle high flow standard device

Examples

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Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 Composition and function of a fully automatic sonic nozzle large flow standard device:

[0014] The standard device of automatic sonic nozzle includes vacuum pump unit 1, gas storage tank 2, sonic nozzle assembly 3, flow regulating valve 4, standard turbine flowmeter 5, straight pipe section group 6, meter clip 7, working section differential pressure transmitter 8, Temperature transmitter 9, software and computer 10, muffler 11, vacuum pump unit 1 are used to provide jet air for calibration medium. The air storage tank 2 is used for buffering and holding the calibration medium jet air. The sonic nozzle assembly 3 includes 8 nozzles 3-1, 8 valves 3-2, 1 temperature sensor 3-3, 1 pressure sensor 3-4, and 1 precision pressure gauge 3-5 for checking different flow rates calibration medium. Straight pipe section group 6 consists of 12 calibers from DN15mm to DN300mm, and is used to connect vacuum pump group 1, gas storage tank 2 and sonic nozzle assembly 3....

Embodiment 2

[0015] Example 2 Working process of a fully automatic sonic nozzle large flow standard device:

[0016] When the device starts to work, turn on the vacuum pump unit 1, and at the same time, the operator inputs the flow value of the meter to be measured in the host computer, and at this time, the software and the computer 10 automatically open the corresponding on-off valve of the nozzle assembly 3 according to the input measurement value. Then the vacuum pump group 1 sucks the air from the inlet of the upstream straight pipe section group 6 of the meter under test, flows through the test pipe section and the flowmeter under test, and after passing through a certain combination of critical flow Venturi nozzles 3-1, it enters the air storage tank 2 for buffering . When the gas device enters a stable state and the pressure before and after the nozzle reaches the critical pressure ratio, the software and computer 10 start to collect data and record it in the CPU. Calculate the ...

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Abstract

The invention relates to a full-automatic sonic nozzle high flow standard device, and belongs to the technical field of flow instrument calibration standard devices. The full-automatic sonic nozzle standard device comprises a vacuum pump set 1, an air storage tank 2, a sonic nozzle assembly 3, a flow regulating valve 4, a standard turbine flowmeter 5, a straight pipe section set 6, a meter clamp 7, a working section differential pressure transmitter 8, a temperature transmitter 9, a software and computer 10 and a muffler 11. The sonic nozzle assembly 3 comprises a nozzle 3-1, a valve 3-2, a temperature sensor 3-3, a pressure sensor 3-4 and a precision pressure gauge 3-5. The full-automatic supersonic nozzle high flow standard device has the advantages that the high flow standard condition volume flow rate, the working condition volume flow rate and the mass flow rate can be calibrated, full-automatic control operation is realized, and the accuracy grade is high.

Description

technical field [0001] The invention relates to a full-automatic sonic nozzle large-flow standard device, which belongs to the technical field of flow meter calibration standard devices. Background technique [0002] At present, the standard device of the large-flow sonic nozzle in the domestic market can only measure 2700m at most 3 The / h flow rate is small, the operation is inconvenient, and the precision is low, which can no longer meet the requirements of the development of petroleum and chemical large flow meter products. Therefore, a large-flow sonic nozzle standard device is required to meet the needs of production and users. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the above technologies, and provide a standard device for a large-flow sonic nozzle with large flow rate, fully automatic operation control and high precision level. The present invention is realized by adopting the following technica...

Claims

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Application Information

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IPC IPC(8): G01F25/00
Inventor 李黎
Owner NINGXIA JIAXIANG AUTOMATIC CONTROL TECH