Multilayer tipping-bucket rain gauge possessing stepped controlled release water injection funnel

Abstract

The invention discloses a multilayer tipping-bucket rain gauge possessing a stepped controlled release water injection funnel and relates to a meteorology and hydrology apparatus. The rain gauge comprises a pedestal, an outer cylinder, a rain bearing port assembly, a support, an upper water injection funnel, an upper tipping bucket, a metering tipping bucket and a counting tipping bucket. The rain gauge is characterized in that the stepped controlled release water injection funnel is arranged between the metering tipping bucket and the upper tipping bucket; the stepped controlled release water injection funnel is formed by a multistage funnel chamber, an orifice, an orifice flow control device and a discharge hole. Rainwater passes through the rain bearing port assembly and the upper water injection funnel and then is injected into the upper tipping bucket. The upper tipping bucket turns over when the water is full and pours the water into the stepped controlled release water injection funnel. And then the water is injected into the metering tipping bucket via the discharge hole. The stepped controlled release water injection funnel can effectively and smoothly reduce a height of water head in the funnel chamber. A rain flow intensity of the discharge hole of the stepped controlled release water injection funnel is smoothly reduced to 4mm / min. A metering error is reduced and apparatus measurement accuracy is increased.

Description

technical field [0001] The invention relates to a meteorological and hydrological instrument, in particular to a multi-layer tipping bucket rain gauge with a step-controlled release water injection funnel. Background technique [0002] The known multi-layer tipping bucket rain gauge is from the GB / T11832-2002 "Tipping Bucket Rain Gauge" standard, the "Guidelines for Meteorological Instruments and Observation Methods" published by the China Meteorological Administration on September 26, 2005, and the SL3 produced by Shanghai Meteorological Instrument Co., Ltd. The -1 type tipping bucket rain gauge is known. Precipitation is injected into the upper tipping bucket through the rain port assembly and the upper water injection funnel. After the upper tipping bucket is full of water, the water is turned over and injected into the lower water injection funnel, and then injected into the metering tipping bucket through the hole of the lower water injection funnel for measurement. Whe...

AI Technical Summary

Problems solved by technology

[0006] The disadvantages and deficiencies of the known multi-layer 0.1mm tipping bucket rain gauge are: the measurement error of other meteorological and hydrological instruments is generally ≤ ± 1%; in contrast, even if the multi-layer 0.1 mm tipping bucket rain gauge is added The tipping bucket and the lower water injection funnel reduce the measurement error limit of the measurement tipping bucket to ±2%, but its accuracy still fails to reach the accuracy level of general hydrological and meteorological instruments, and cannot reduce the measurement error of the measurement tipping bucket more effectively

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