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Calibration device for sonic nozzle gas flowmeter by positive-pressure method and application method

A gas flow meter and sonic nozzle technology, applied in the field of flow meter calibration, can solve the problems of huge device system, huge investment and operating costs, etc.

Inactive Publication Date: 2009-04-29
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device system using the positive pressure method is huge, and the investment and operation costs are huge. Most of the domestic measurement and testing departments use the negative pressure method as the gas source type, and there are not many positive pressure methods.

Method used

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  • Calibration device for sonic nozzle gas flowmeter by positive-pressure method and application method
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  • Calibration device for sonic nozzle gas flowmeter by positive-pressure method and application method

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Embodiment Construction

[0045] Such as figure 2 As shown, the device includes a ball valve 2, a solenoid valve 4, a filter tank 6, a dehumidification tank 7, an air storage tank 8, a pressure regulator tank 12, and a stagnation container 14, at the entrance of the high-pressure gas pipe 1 and the entrance of the low-pressure gas pipe 3 Ball valves 2 are installed respectively, and a solenoid valve 4 is installed on the ball valve 2. The solenoid valve 4 is connected to the computer, and the low-pressure gas pipe 3 and the high-pressure gas pipe 1 are connected to the gas supply pipeline 5 at the same time. A three-pipe regulator is installed between the gas storage tank 8 and the surge tank 12, and three pipelines with different calibers are connected in parallel in the gas storage tank 9, medium-bore pipeline 10, and thin-bore pipeline 11. Between the tank 8 and the surge tank 12, a ball valve 2 is installed on each pipeline, and a solenoid valve 4 is installed on the ball valve 2. The solenoid val...

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Abstract

The invention relates to a positive pressure method sonic nozzle gas flowmeter calibrating device and an application method. The calibrating device comprises a filter tank, a dehumidification tank, an air storage tank, a three-pipeline pressure-stabilizing regulator, a pressure-stabilizing tank, a ten-venturi sonic nozzle group, a stagnation container and a computer; and an air source conveying pipeline is provided with a double air source structure with two air source pipelines with different pressures for switching air supply; the three-pipeline pressure-stabilizing regulator is arranged between the air storage tank and the pressure-stabilizing tank; and the calibrating device can realize calibrating of a steam meter through air medium. The invention adopts the positive pressure method, can be suitable for air sources with different pressures for detection, and saves energy. In addition, an air flow meter calibrating device and a steam meter calibrating device are integrated, thereby properly reducing the volume of the device, reducing investment and operation cost, and having simple operation.

Description

technical field [0001] The invention belongs to the technical field of flowmeter calibration, in particular to a calibrating device and application method for a gas flowmeter of a sonic nozzle with a positive pressure method. Background technique [0002] At present, the gas and steam flow calibration devices at home and abroad mainly include PVTt method, high-precision positive displacement flowmeter standard meter comparison method, sonic Venturi nozzle method, bell method and weighing method. Among them, the PVTt method and the weighing method are expensive and have complex structures, and are mostly used in research institutions. The bell jar method calibrates various gas flowmeters under low pressure conditions, and is not suitable for calibrating flowmeters under high pressure conditions. Imported high-precision positive displacement flowmeters are expensive, and the accuracy is prone to change, making maintenance difficult. The sonic nozzle method has a simple and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F25/00
Inventor 王瑞岭单纯利穆桂荣
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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