Differential force trigger type precise irrigation water quantity measuring device

Abstract

The invention discloses a differential force trigger type precise irrigation water quantity measuring device. The upper end of a lifting control device is fixedly arranged on an outer box, and the lower end of the lifting control device extends into the outer box to be fixedly connected to the top of an inner box; a first water inlet and a second water inlet which cooperate with each other are formed in the upper end or the middle end of the water inlet side of the inner box and the water inlet side of the outer box respectively, and a first water outlet and a second water outlet which cooperate with each other are formed in the lower end of the water outlet side of the inner box and the lower end of the water outlet side of the outer box respectively; the lifting control device lifts theinner box upwards, the first water inlet and the second water inlet are at least partially overlapped, and water in a ditch protection slope enters the inner box; when the quantity of the water in theinner box gradually increases and the gravity of the inner box exceeds downward resistance, the inner box descends and stays in a water outlet state, the first water outlet and the second water outlet are at least partially overlapped, and the water in the inner tank flows into farmland. The total water quantity is calculated by accumulating the water quantity each time and the lifting frequencyof a water tank, and the quantity of the water for irrigating a field is accurately measured, so that improvement of the utilization efficiency of water resources and intelligent control over the quantity of the water for irrigation are achieved.

Description

technical field [0001] The invention relates to a differential trigger type precision irrigation water metering device, which belongs to the technical field of irrigation water metering devices. Background technique [0002] In today's society, agricultural water consumption is a major consumer of water resources. In recent years, the construction of agricultural water-saving projects has achieved certain results. However, the extensive and inefficient use of agricultural irrigation is still widely used at present, which exacerbates the shortage of water resources to a certain extent. Practice has proved that the construction of agricultural water metering facilities and the metering, charging and control of agricultural water use are effective measures for sustainable agricultural development and an important part of the construction of a water-saving society. However, due to the traditional concept of agricultural water use in my country for a long time, there are few met...

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Problems solved by technology

[0003] The measurement of irrigation water is a basic and key technology. Traditional Parshall water measuring tanks, U-shaped water measuring tanks and other water measuring devices are only suitable for measuring large water volumes such as main canals and ditches, and are used to realize open channel water delivery in surface water irrigation areas. measurement, but the measurement accuracy of such devices is generally not high

However, some large-scale precision flow devices, such as ultrasonic flowmeters and infrared flowmeters, have high measurement accuracy, but they have high investment costs, complicated installation and high maintenance costs, which will increase the burden on farmers.

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