Intelligent water meter with automatic flow correction function

Abstract

The invention discloses an intelligent water meter with an automatic flow correction function. The intelligent water meter comprises a shell, an inlet pipe, an outlet pipe, a meter head and an impeller, wherein the side faces of the shell are connected with the inlet pipe and the outlet pipe, the impeller is arranged in the shell, the meter head is arranged at the top of the shell, the upper end of the impeller is connected to the meter head, the inlet pipe and the outlet pipe are tangent to the outer edge of the impeller in an arc mode, and a fine adjustment assembly is arranged at the upper end of the impeller and adjusts the rotation resistance moment of the impeller. Water flow can fully drive the impeller to rotate through water inlet and water outlet in the tangential direction, so that accurate counting is obtained in the meter head; and the fine adjustment assembly at the upper end of the impeller is used for adjusting the rotation resistance of the impeller, and the rotation resistance is approximately consistent with the rotation resistance during factory calibration through active adjustment of the rotation resistance of the impeller, so that the flow-rotating speed correspondence relation established during factory calibration is kept in an accurate state, and slow running of the water meter caused by a resistance moment error is eliminated.

Description

technical field [0001] The invention relates to the technical field of water meters, in particular to an intelligent water meter with the function of automatic flow correction. Background technique [0002] The water meter is a widely used flow detection device and has many applications in residential water detection. [0003] In the prior art, the commonly used structure of the water meter is the impeller-type rotating metering structure. When the water flows through the impeller, the impeller is driven to rotate, and the gear set at the end of the impeller performs counting or the photoelectric signal counts and counts. Carry out calibration to obtain the corresponding relationship table between impeller speed and flow rate. The ideal is a linear relationship, that is, the greater the flow rate, the higher the speed. The slope of the linear relationship is related to the rotational resistance of the impeller. The greater the rotational resistance, the linear relationship s...

AI Technical Summary

Problems solved by technology

[0004] After the water meter is used for a long time, the rotating support position of the impeller will be worn, and the rotating resistance will change. Therefore, the corresponding relationship between the flow rate and the rotating speed deviates from the factory calibration relationship, which affects the accuracy of the measurement data. Therefore, the general water meter will have a service life limit or Regular calibration is required, and maintenance is labor-intensive. For some short-term faults, the rotational resistance of the impeller changes greatly. Therefore, before the next cycle of maintenance comes, the flow measurement in this period is inaccurate, resulting in waste of resources and even potential safety hazards.

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