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Flowmeter for final-stage channel

A flow meter and channel technology, which is applied to the volume/mass flow generated by mechanical effects, and the dynamic effect of fluid flow through detection, etc., can solve the problem of wide area and large volume of the final channel, which restricts the application and promotion of water measurement in the final channel and other issues to achieve the effect of reducing the probability of theft, low probability of failure and high reliability

Inactive Publication Date: 2011-08-17
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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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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  • Flowmeter for final-stage channel
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  • Flowmeter for final-stage channel

Examples

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Embodiment Construction

[0023] A special water meter for the final channel, such as figure 1 , figure 2 As shown, it includes: the vertical water flow direction spans above the channel 1, the two ends are respectively fixed on the beam 3 on the flow meter support 2 symmetrically placed on both sides of the channel 1, and the rotation angle displacement sensor 4 is installed in the middle of the flow meter beam 3 , the rotating shaft 5 of the rotation angle displacement sensor 4 is parallel to the flowmeter beam 3, the small head of the drop-shaped float 7 is fixed on the connecting rod 6, and the other end of the connecting rod 6 is fixed on the rotating shaft 5 of the rotation angle displacement sensor 4, and the rotation angle displacement The lead wire 8 of the sensor 4 is connected to the flow indicating meter 9, and the rotation angle sensor 4 adopts a potentiometer type angular displacement sensor.

[0024] After the channel 1 discharges water, the float 7 drives the rotating shaft 5 of the r...

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Abstract

The invention relates to a flowmeter for a final-stage channel. The flowmeter is characterized in that: after a channel (1) is filled with water, a floater (7) drives a rotating shaft (5) of a rotary angle displacement sensor (4) by a connecting rod (6) to rotate; the rotary angle displacement sensor (4) converts a mechanical signal of a rotary angle position into an electrical signal; by an outgoing line (8) of the rotary angle displacement sensor (4), the electrical signal is transmitted to a flow indicator (9); and a one-to-one corresponding relationship between the deflection angle of the dial pointer of the flow indicator (9) and the water depth in the ditch (1) is established. Flow value, corresponding to a computed or marked corresponding water depth, is carved on the dial of the flow indicator (9) in advance, and by reading a flow scale which is pointed by the dial pointer on the flow indicator (9), a specific flow value is obtained. The flowmeter has the characteristics of low investment, high reliability and convenience for use.

Description

Technical field: [0001] The invention relates to an open channel flow measurement device, in particular to a low-cost irrigation final channel flow measurement 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 w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/28
Inventor 高胜国黄修桥齐学斌翟国亮段福义刘扬
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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