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Gas flow standard device using pVTt technique

A gas flow and standard device technology, applied in the field of flow standards, can solve the problems of not being able to meet the actual needs, lack of science and legality, etc., and achieve the effects of high accuracy, large detection range, and improved efficiency

Inactive Publication Date: 2019-01-15
ZHENJIANG MEASUREMENT VERIFICATION TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, units that have pVTt method gas flow standard devices in our country work under normal pressure and micro positive pressure, and the maximum verified flow rate only reaches 1300m 3 / h, can no longer meet the actual demand
And the 0.2-level high-precision standard gas flowmeter has been widely used in gas standard centering, but there is a lack of scientific and legal standard devices to provide effective traceability

Method used

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  • Gas flow standard device using pVTt technique
  • Gas flow standard device using pVTt technique
  • Gas flow standard device using pVTt technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A pVTt method gas flow standard device provided in this embodiment can be used under two working conditions, positive pressure and negative pressure, share a set of pipelines, data acquisition, transmission, processing and control systems, and can be carried out independently or simultaneously Inspection work, and can verify (calibrate) high-precision gas flowmeters (such as 0.2-level gas waist wheel flowmeters, Coriolis mass flowmeters, gas turbine flowmeters, etc.). The device includes a standard container 100 , a clamping meter system 200 , a flow regulating system, an air source system 300 , a control system and a pipeline system 400 . Specifically, the above-mentioned components are connected in an open-loop or closed-loop through the pipeline system 400 to form a pipeline passage. The standard container 100 adopts the existing overall skid-mounted structure, and the skid-mounted structure refers to the integration of functional components into an integral base. In...

Embodiment 2

[0049] In this embodiment, in order to improve the detection efficiency and adapt to the detection of different specifications, the difference between this embodiment and the first embodiment is that the specification of the verification platform is 0.1m respectively. 3 Standard container platform, 3m 3 Standard container stand and 34m 3 Standard container stand; respectively corresponding to 0.1m 3 、3m 3 and 34m 3 Standard containers, 100 standard containers of different specifications constitute a standard container group, of which 3m 3 、34m 3 The standard container adopts a water jacket type constant temperature device, 0.1m 3 The standard container adopts a water bath type constant temperature device, and the three can carry out testing operations simultaneously or independently. refer to Figure 8-10 in, of which Figure 9 , 10 for Figure 8 The enlarged schematic diagram of modules E and F in the middle, where E is 3m 3 Standard container, F is 0.1m 3 Standar...

Embodiment 3

[0061] Referring to the above-mentioned embodiments, the adjustable opening pneumatic valve in the pVTt method gas flow standard device according to the present invention is shown as CV101 or CV102 in the figure, which is used for positive pressure pipeline flow control. Gas is the power source, the cylinder is used as the actuator, and the valve is driven by accessories such as valve positioner, converter, solenoid valve, position valve, gas storage tank, and gas filter, and the switch can be realized by adjusting the opening. Quantitative or proportional adjustment to adjust the pipeline medium: flow, pressure, temperature, liquid level and other process parameters. It should be noted that the pneumatic piston actuator in this embodiment uses compressed air as the power source, that is, the air source generated by the air source system 300 communicates with the pneumatic control valve through the pipeline, and the valve is driven by the movement of the piston in the valve. T...

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Abstract

The invention discloses a gas flow standard device using a pVTt technique. The gas flow standard device comprises a standard container group system, a tong-test ammeter system, a flow adjustment system, a power system, a control system and a pipeline system. An overall skid-mounted structure is adopted by the standard container group system, and the pipeline system comprises a detected meter pipeline, a detected pipeline trunk, a standard meter pipeline trunk, a vacuum pipe and an air suction-exhaust pipeline of a suction fan. The gas flow standard device provided by the invention has the beneficial effects that the detection range is wide, the accuracy is high, two detection states of a positive pressure and a negative pressure are provided, the efficiency is improved, and dissemination of value of quantity can be performed on a sonic nozzle and a high-grade standard meter.

Description

technical field [0001] The invention relates to the technical field of flow standards, in particular to a pVTt method gas flow standard device. Background technique [0002] In order to effectively carry out the detection of gas energy meters, the construction of gas flow standard devices in my country has entered a period of rapid development. However, due to the differences in the technical level of production enterprises, the quality of standard devices varies, and the problem of standard device inspection is becoming increasingly prominent. Combined with the status quo of traceability of gas flow meters in my country and the situation that can meet the needs of multiple industries for effective and rapid traceability of gas flow standard devices, the developed flow range is wide, the accuracy is high, and it has two detection conditions of positive pressure and negative pressure. And it is necessary to have a pVTt method gas flow standard device that can measure the sonic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
CPCG01F25/17G01F25/15
Inventor 石建荣肖晖周轶赵作广董芳孙彩虹徐焰栋李志
Owner ZHENJIANG MEASUREMENT VERIFICATION TEST CENT