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Irrigation ditch simple and easy flowmeter

A technology for agricultural canals and flow indication, applied in the direction of volume/mass flow generated by mechanical effects, can solve the problems of wide area and large volume of the final channel, restricting the use and promotion of water measurement in the final channel, and reduce theft The probability of failure, the probability of failure is small, and the effect of high reliability

Inactive Publication Date: 2011-10-19
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the open channel flow measurement technology and equipment are quite mature, due to the wide area and large volume of the final channel (bucket canal, agricultural canal), the existing open channel flow measurement device is applied to the final channel, because there are problems in investment, operation, maintenance, etc. , which restricts the application and promotion of water measurement in the final channel

Method used

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  • Irrigation ditch simple and easy flowmeter
  • Irrigation ditch simple and easy flowmeter
  • Irrigation ditch simple and easy flowmeter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Embodiment: When the length is greater than 20 times the maximum water depth, an open channel uniform flow is formed in the channel, and the flow is calculated with the open channel uniform flow formula. According to different water depths in the channel, the corresponding flow through the channel is calculated according to the following formula, and depicted on the flow indicating dial 8.

[0026] Q = AC Ri

[0027] In the formula, Q——flow rate (m 3 / s);

[0028] A——cross-sectional area of ​​water (m 2 );

[0029] i—hydraulic slope, which is the same as the longitudinal slope of the canal bottom;

[0030] R——hydraulic radius of water-passing section (m), R = A X ;

[0031] X—wet circumference (m);

[0032] C——The open channel talent appreciation coefficient, C = 1 n R ...

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PUM

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Abstract

The invention relates to a water measuring device specially for irrigation ditches. The device is characterized in that when water is released from a ditch (1), a floater (4) drives an indicator (7) which is fixed on a bearing (6) outer sleeve to deflect through a connecting rod (5) and a bearing (6) which is installed at the middle part of a cross rod (3); and the deflection angle of the indicator (7) has one-to-one correspondence confirmed relationship with the water depth in the ditch (1). The calculated or calibrated flow rate number corresponding with the corresponding water depth is described on a flow rate indicator dial (8) in advance, through reading the flow rate scale on the flow rate indicator dial (8) indicated by the indicator (7), the specific number of the flow rate is obtained; and the flowmeter has the characteristics of less input and high reliability, and is convenient to use.

Description

Technical field: [0001] The invention relates to an open channel flow measuring device, in particular to a low-cost irrigation canal flow measuring device. Background technique: [0002] Water measurement in irrigation areas is a necessary measure for rationally dispatching irrigation water sources, correctly implementing water use plans, and strengthening water management. [0003] To measure water in irrigation canal systems, water-measuring structures such as water-measuring weirs and water-measuring tanks are usually specially set up on the canal systems. Through the scientific shrinkage of the water-passing section of the main section of the water-measuring buildings, a certain water level difference is formed between the upstream and downstream, so that A relatively stable relationship between water level and flow is obtained. Water level monitoring is the basic work of flow calculation using specially designed water measuring structures. At present, the water level s...

Claims

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Application Information

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IPC IPC(8): G01F1/52
Inventor 高胜国黄修桥仵峰翟国亮邓忠刘扬
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI