Automatic calibrating device and method for high-precision flow nozzle

Abstract

The invention discloses an automatic calibration device and method for a high-precision flow nozzle, and relates to the technical field of flow calibration of the high-precision flow nozzle. The problems that an existing flow calibrating device for a high-precision flow nozzle is complex in operation, large in manual calculation amount and poor in calibrating result accuracy are solved. Sufficient circulating water is stored in the water storage tank, the working temperature is designed according to the nozzle before verification, the water temperature is heated to a proper value as much as possible, the switching valve is arranged on the circulating side before each working condition is detected, and the circulating water returns to the circulating water tank; during detection, the switching valve is quickly switched to a'measuring side ', circulating water flows into the measuring water tank, the change of the water volume in the water tank is measured through the weighing instrument or the liquid level measuring instrument, after detection is finished, the switching valve is quickly switched to the'circulating side', the average flow flowing through the nozzle is calculated, the outflow coefficient of the nozzle is calculated, and the average flow and the outflow coefficient are compared with standard values. The method is suitable for automatic verification of the high-precision flow nozzle.

Description

technical field [0001] The invention relates to the technical field of flow verification of high-precision flow nozzles. Background technique [0002] The important water flow in some industrial processes is often measured by high-precision flow nozzles. For example, the main flow rate of the steam turbine unit performance assessment test in a power plant is often measured with a low β throat pressure-taking nozzle. This high-precision flow nozzle needs to be verified on a special test bench together with the front and rear straight pipe sections. [0003] The current flow verification device is complicated to operate, and the amount of manual calculation is large. The test results are limited by the level of the test personnel, and there is a problem of poor accuracy of the test results. Contents of the invention [0004] The purpose of the present invention is to solve the problems of complex operation, large amount of manual calculation and poor accuracy of test resul...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex operation, large amount of manual calculation, and poor accuracy of verification results in the flow verification device of the existing high-precision flow nozzle, and propose an automatic verification device and method for the high-precision flow nozzle

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