CN103759771A - Metering device and measuring method capable of accurately measuring irrigation water quantity in field - Google Patents
Metering device and measuring method capable of accurately measuring irrigation water quantity in field Download PDFInfo
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- CN103759771A CN103759771A CN201410039221.XA CN201410039221A CN103759771A CN 103759771 A CN103759771 A CN 103759771A CN 201410039221 A CN201410039221 A CN 201410039221A CN 103759771 A CN103759771 A CN 103759771A
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Abstract
The invention relates to an accurate measuring device, in particular to a metering device capable of measuring the irrigation water quantity in a field in real time when water is delivered to the field through the tail end of a canal system. The metering device capable of accurately measuring the irrigation water quantity in the field comprises a siphon pipe (1) which is in the shape like a Chinese character 'ji'. The middle portion of the siphon pipe (1) is provided with a top protruding upwards. The two ends of the siphon pipe (1) are provided with a water inlet (2) and a water outlet (3) respectively. A pressure hole (4) is formed in the top of the siphon pipe (1) and is connected with a high-precision pressure sensor (6). The high-precision pressure sensor (6) is connected with a micro-processing chip (7). The micro-processing chip (7) is connected with a liquid crystal display (8). The metering device is wide in application range, can be applied to all surface irrigation systems, is capable of being applied to water delivering to the field through the tail end of the canal system and can also be used for measuring water resources in the water delivering process.
Description
Technical field
The present invention relates to a kind of accurate measurement mechanism, while particularly measuring in real time canal system end to field water distribution about one, the measuring apparatus of the field irrigation water yield.
Background technology
China is extremely deficient scarce country of a water resource, and agricultural irrigation is the water rich and influential family of water resource, and average annual use amount is 360,000,000,000 m
3, mainly take ground filling as main, irrigation water utilization ratio is only 0.50 left and right.Farmland irrigating water utilize a low major reason be at sublateral canal in the transmission & distribution water process of field, lack effective irrigation implement and metering outfit.Therefore a kind of effectively field transmission & distribution water of exploitation and metering outfit are imperative.
Take ground filling in main typical irrigated area, when sublateral canal is irrigated to field transmission & distribution water, often adopt directly hand excavation's breach on canal system end to irrigate, pour water finish after manually backfill (as shown in Figure 1) again.Such irrigation method has caused that water resources management is extensive, labour has high input, field ditch system destroys the problems such as serious and water resource waste is serious.
The metering method of field transmission & distribution water generally adopts standard of landfill weir, by measuring head on weirs H, approach velocity V
0and obtain weir crest total head H
0, and the water-carrying section width b by measurement standard weir and consult corresponding correction factor, by the energy equation of current, carry out estimated flow (as shown in Figure 2).The model of estimation often adopts:
In formula: the water flow that Q is weir, k is contraction coefficient, and b is weir section width, and ζ is local loss coefficient, and ξ is correction factor;
From the flow rate calculation formula of standard volume mill weir above, to head on weirs H and approach velocity V
0measurement itself just there is larger error, and need to consult corresponding correction factor and empirical value just can obtain result, precision can not get effective assurance.
Along with scientific and technical progress, ultrasound wave and infrared technique are also used for measuring the flow of canal system, but these two kinds of technical costss are relatively high, also require canal cross section relative standard simultaneously, are restricted in actual applications.
Summary of the invention
The object of the present invention is to provide a kind of measuring apparatus of a kind of field irrigation water yield of utilizing siphon principle in pipeline transmission & distribution water process and hydraulic performance thereof, that it has is convenient, high precision, intelligentized feature.
The present invention also aims to provide a kind of flow-measuring method of the measuring apparatus of utilizing the described accurate measurement field irrigation water yield, that it has is convenient, high precision, intelligentized feature.
For achieving the above object, the present invention is by the following technical solutions:
A measuring apparatus for the accurate measurement field irrigation water yield, described device comprises:
At the top of U trap 1, be provided with a pressure tap 4, pressure tap 4 connects a high-precision pressure sensor 6, and high-precision pressure sensor 6 is connected with a micro-chip processor 7, and micro-chip processor 7 is connected with a LCDs 8.
Between described pressure tap 4 and high-precision pressure sensor 6, be connected a pressure transmission spiral pipe 5.
Described micro-chip processor 7 is packaged together by waterproof kit 9 with LCDs 8.
The height at the top of described U trap 1 is poor higher than the height on channel water level and canal dam.
Use a measuring method for the measuring apparatus of the described accurate measurement field irrigation water yield of one of the claims,
A, the measuring apparatus of the described accurate measurement field irrigation water yield is demarcated, and correlation parameter is write in micro-chip processor 7;
B, the measuring apparatus of the accurate measurement field irrigation water yield one of at least one the claims Suo Shu is placed in to channel, makes water in a canal enter U trap 1 and be full of the cavity of U trap 1 from water inlet 2 and water delivering orifice 3;
C, the water inlet of U trap 12 is immersed in water in a canal completely, then water delivering orifice 3 is sealed, and guide water delivering orifice 3 into field, make water delivering orifice 3 lower than water inlet 2, in this process, keep the complete Riddled Condition of water inlet 2;
D, discharge the mouth of a river 3, make water delivering orifice 3 become opening-wide state from sealing state, water in a canal is introduced field by U trap 1 under the effect of siphon like this;
E, micro-chip processor 7 receive the data that pressure transducer 6 gathers in real time, by processing, calculate, and obtain field irrigation data on flows, and output in LCDs 8;
Data in f, LCDs 8 are the data on flows of field irrigation, directly read.
Beneficial effect of the present invention is:
1, applied range of the present invention, can apply in all surface irrigation systems, and both can apply to the transmission & distribution water of end canal system to field, the metering of water resource in the time of also can be for transmission & distribution water.
2, easy for installation, flexible operation, and not affected by the factors such as SEA LEVEL VARIATION, can to the water yield of field irrigation, carry out Real-Time Monitoring to any canal section in irrigated area.
3, the present invention selects high-precision sensor and micro-chip processor, and precision is high.
4, self-organizing system of the present invention, simple and reasonable, and cost is low.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of irrigation method of the prior art;
Fig. 2 is the sectional view along a-a line in Fig. 1;
Fig. 3 is the structural representation of the embodiment 1 of the measuring apparatus of the accurate measurement field irrigation water yield of the present invention;
Fig. 4 is the structural representation of the embodiment 2 of the measuring apparatus of the accurate measurement field irrigation water yield of the present invention;
Fig. 5 is of the present invention to field transmission & distribution water and accurately measure the work schematic diagram of the measuring apparatus of the field irrigation water yield.
[primary clustering symbol description]
U trap 1 water inlet 2
Pressure transmission spiral pipe 5 high-precision pressure sensors 6
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.The present invention is not limited to following examples.
Embodiment 1:
As shown in Figure 3, the measuring apparatus of the accurate measurement field irrigation water yield of the present invention, comprises "Ji" type U trap 1, and the two ends of U trap 1 have respectively water inlet 2 and water delivering orifice 3, for diversion and draining.The middle part of U trap 1 has a top raising up, and the height at top is poor higher than the height on channel water level and canal dam, is provided with a pressure tap 4 at the top of U trap 1, and high-precision pressure sensor 6 is directly connected on pressure tap 4.High-precision pressure sensor 6 is connected with a micro-chip processor 7, and micro-chip processor 7 is converted into the current signal of high-precision pressure sensor 6 digital signal and calculates real-time flow value by the program writing in advance.Micro-chip processor 7 is connected with a LCDs 8, and the flow value that LCDs 8 is calculated micro-chip processor 7 shows.Micro-chip processor 7 is packaged together by waterproof kit 9 with LCDs 8.
Embodiment 2:
As shown in Figure 4, pressure tap 4 connects a pressure transmission spiral pipe 5, the other end of pressure transmission spiral pipe 5 connects high-precision pressure sensor 6, and pressure transmission spiral pipe 5 passes to high-precision pressure sensor 6 by the force value of pressure tap 4, to guarantee the Real-Time Monitoring of the top pressure to U trap 1.
Fig. 5 is the work schematic diagram of the measuring apparatus of the accurate measurement field irrigation water yield of the present invention:
In farmland surface irrigation system, choose the U trap 1 of multiple same sizes, be arranged in side by side in sublateral canal, and in optional embodiment 1 or 2 one, be used for sublateral canal to the transmission & distribution water in field and the metering of irrigation water, now sublateral canal is n × Q to the flow of field irrigation, and n is all same size U trap numbers including U trap 1, and Q is the flow that U trap 1 is surveyed.
In above-described embodiment, field irrigation flow and total amount can be passed through real-time collection the demonstration of LCDs 8, reaching after irrigation quantitatively, take out the measuring apparatus of accurately measuring the field irrigation water yield, and end is irrigated.
A kind of flow-measuring method of the measuring apparatus of utilizing the described accurate measurement field irrigation water yield is as follows:
1, the measuring apparatus of the described accurate measurement field irrigation water yield is demarcated, and correlation parameter is write in micro-chip processor 7;
2, the measuring apparatus of at least one accurate measurement field irrigation water yield of the present invention is placed in to channel, makes water in a canal enter U trap 1 and be full of the cavity of U trap 1 from water inlet 2 and water delivering orifice 3;
3, the water inlet of U trap 12 is immersed in water in a canal completely, then water delivering orifice 3 is sealed, and guide water delivering orifice 3 into field, make water delivering orifice 3 lower than water inlet 2, in this process, keep the complete Riddled Condition of water inlet 2;
4, discharge the mouth of a river 3, make water delivering orifice 3 become opening-wide state from sealing state, water in a canal is introduced field by U trap 1 under the effect of siphon like this;
5, micro-chip processor 7 receives the data that pressure transducer 6 gathers in real time, by processing, calculates, and obtains field irrigation data on flows, and outputs in LCDs 8;
6, the data in LCDs 8 are the data on flows of field irrigation, directly read.
The above, be only preferred embodiment of the present invention, any based on equivalent transformation of the present invention, within all should being included in protection scope of the present invention.
Claims (5)
1. a measuring apparatus of accurately measuring the field irrigation water yield, is characterized in that:
Described device comprises:
U trap (1), described U trap (1) is "Ji" type, and position, intermediate portion has a top raising up, and the two ends of U trap (1) have respectively water inlet (2) and water delivering orifice (3);
At the top of U trap (1), be provided with a pressure tap (4), pressure tap (4) connects a high-precision pressure sensor (6), high-precision pressure sensor (6) is connected with a micro-chip processor (7), and micro-chip processor (7) is connected with a LCDs (8).
2. the measuring apparatus of the accurate measurement field irrigation water yield as claimed in claim 1, is characterized in that: between described pressure tap (4) and high-precision pressure sensor (6), be connected a pressure transmission spiral pipe (5).
3. the measuring apparatus of the accurate measurement field irrigation water yield as claimed in claim 1 or 2, is characterized in that: described micro-chip processor (7) is packaged together by waterproof kit (9) with LCDs (8).
4. the measuring apparatus of the accurate measurement field irrigation water yield as claimed in claim 1 or 2, is characterized in that: the height at the top of described U trap (1) is poor higher than the height on channel water level and canal dam.
5. a measuring method of using the measuring apparatus of the described accurate measurement field irrigation water yield of one of the claims, is characterized in that:
A, the measuring apparatus of the described accurate measurement field irrigation water yield is demarcated, and correlation parameter is write in micro-chip processor (7);
B, the measuring apparatus of the accurate measurement field irrigation water yield one of at least one the claims Suo Shu is placed in to channel, makes water in a canal enter U trap (1) and be full of the cavity of U trap (1) from water inlet (2) and water delivering orifice (3);
C, the water inlet of U trap (1) (2) is immersed in water in a canal completely, then by water delivering orifice (3) sealing, and guide water delivering orifice (3) into field, make water delivering orifice (3) lower than water inlet (2), in this process, keep the complete Riddled Condition of water inlet (2);
D, discharge the mouth of a river (3), make water delivering orifice (3) become opening-wide state from sealing state, water in a canal is introduced field by U trap (1) under the effect of siphon like this;
E, micro-chip processor (7) receive the data that pressure transducer (6) gathers in real time, by processing, calculate, and obtain field irrigation data on flows, and output in LCDs (8);
Data in f, LCDs (8) are the data on flows of field irrigation, directly read.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410039221.XA CN103759771A (en) | 2014-01-26 | 2014-01-26 | Metering device and measuring method capable of accurately measuring irrigation water quantity in field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410039221.XA CN103759771A (en) | 2014-01-26 | 2014-01-26 | Metering device and measuring method capable of accurately measuring irrigation water quantity in field |
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| CN103759771A true CN103759771A (en) | 2014-04-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895028A (en) * | 2015-06-19 | 2015-09-09 | 河海大学 | Drop impact irrigation water volume metering and automatic gate integrated device |
| CN109099984A (en) * | 2018-09-17 | 2018-12-28 | 中车环境科技有限公司 | A kind of liquid metering device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2085057U (en) * | 1990-12-06 | 1991-09-18 | 孙庆义 | Low-resistance water flow measuring instrument for pipeline |
| CN2152387Y (en) * | 1993-04-03 | 1994-01-12 | 云南农业大学 | Multifunctional mobile water-saving siphon irrigation device |
| CN2195573Y (en) * | 1994-03-29 | 1995-04-26 | 万卷 | Large-flow, high-level siphoning installation |
-
2014
- 2014-01-26 CN CN201410039221.XA patent/CN103759771A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2085057U (en) * | 1990-12-06 | 1991-09-18 | 孙庆义 | Low-resistance water flow measuring instrument for pipeline |
| CN2152387Y (en) * | 1993-04-03 | 1994-01-12 | 云南农业大学 | Multifunctional mobile water-saving siphon irrigation device |
| CN2195573Y (en) * | 1994-03-29 | 1995-04-26 | 万卷 | Large-flow, high-level siphoning installation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895028A (en) * | 2015-06-19 | 2015-09-09 | 河海大学 | Drop impact irrigation water volume metering and automatic gate integrated device |
| CN109099984A (en) * | 2018-09-17 | 2018-12-28 | 中车环境科技有限公司 | A kind of liquid metering device and method |
| CN109099984B (en) * | 2018-09-17 | 2020-07-28 | 中车环境科技有限公司 | Liquid metering device and method |
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Application publication date: 20140430 |