CN102155960A - Flowmeter for final-stage channel - Google Patents
Flowmeter for final-stage channel Download PDFInfo
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- CN102155960A CN102155960A CN 201110056862 CN201110056862A CN102155960A CN 102155960 A CN102155960 A CN 102155960A CN 201110056862 CN201110056862 CN 201110056862 CN 201110056862 A CN201110056862 A CN 201110056862A CN 102155960 A CN102155960 A CN 102155960A
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- displacement transducer
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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:
The present invention relates to a kind of open channel flow rate measurement mechanism, relate in particular to a kind of final stage canal capacity measurement mechanism of irrigating cheaply.
Background technology:
The irrigated area water gaging is rational management iirigation water source, the plan of correct execution water, strengthens the requisite measure of management of the use of water, is the prerequisite by side's charge, also is the important technical of weighing irrigation management level and irrigation water utilization factor height.
The irrigation canal system water gaging generally is measuring structures such as ad hoc weir, flume on canal system, and the science of throughput water buildings main paragraph water-carrying section is shunk, and makes its upstream and downstream form certain height of water, thereby obtains comparatively stable stage discharge relation.The monitoring of water level is to utilize ad hoc measuring structure to carry out the element task of flow rate calculation, and the level sensor that adopts in the irrigated area mainly contains float-type transmitter, pressure type sensor and ultrasonic sensor etc. at present.
Although open channel flow rate measuring technique equipment is quite ripe, because final stage channel (lateral canal, field ditch) is large in number and widely distributed, existing open channel flow rate measurement mechanism, be applied to the final stage channel, because existing problems such as input, operation, maintenance have restricted utilization and popularization at the final stage canal water gauging.Therefore, the metering of final stage canal capacity is a weak link of agricultural irrigation water metering always.Press for final stage canal water gauging equipment simple, economic, that easily go, be convenient to masses' grasp and accept.
Summary of the invention:
The object of the present invention is to provide a kind of economical and practical, final stage channel private volumn wetting system that reliability is high.
The object of the present invention is achieved like this: comprise that Transverse to the flow direction is across the channel top, two ends are individually fixed in symmetry and are placed in crossbeam on the flowmeter support of channel both sides, anglec of rotation displacement transducer is installed at middle part at the flowmeter crossbeam, the shaft parallel of anglec of rotation displacement transducer is in the flowmeter crossbeam, the microcephaly of water droplet shape float is fixed in connecting rod, the other end of connecting rod is fixed in the rotating shaft of anglec of rotation displacement transducer, the extension line of anglec of rotation displacement transducer is connected on the flow indicating gauge, and anglec of rotation displacement transducer adopts the potentiometer type angular transducer.
After channel discharges water, float rotates by the rotating shaft of connecting rod driven rotary angle displacement sensor, anglec of rotation displacement transducer is converted to electric signal with the mechanical signal of rotary angle position, extension line by anglec of rotation displacement transducer, be sent on the flow indicating gauge, make the deflection angle and the depth of water in the channel of the dial plate pointer of flow indicating gauge that relation one to one be arranged.To calculate or demarcate good respective water depth corresponding flow numerical value portrayal in advance on the dial plate of flow indicating gauge,, obtain the concrete numerical value of flow by reading the dial plate flow scale of the dial plate pointed on the flow indicating gauge.
The acquisition of flow scale is divided into two kinds of situations.Length forms open channel uniform flow during greater than 20 times of maximum water depths in the channel, with open channel uniform flow formula calculated flow rate.According to the different depth of waters in the channel, by the corresponding discharge of following formula calculating by channel, portrayal is on the dial plate of flow indicating gauge.
In the formula, Q---flow (m
3/ s);
A---discharge section area (m
2);
I---hydraulic slope is identical with longitudinal gradient at the bottom of the canal;
R---water-carrying section hydraulic radius (m),
X---wetted perimeter (m);
C---open channel thanks to just coefficient,
N---roughness coefficien can be surveyed, also can be with reference to following numerical value: during smooth plank, and n=0.012; During concrete, n=0.014; When the field stone piece is built by laying bricks or stones, n=0.015.
For non-open channel uniform flow, can select typical canal section, actual measurement obtains the depth of water---discharge relation curve, on this basis, according to the different depth of waters in the channel, intercept corresponding flow numerical value on this curve, portrayal is used for the flow measurement of similar canal section on the dial plate of flow indicating gauge.
The present invention has following good effect:
Saved ad hoc measuring structures such as weir, flume, the amplitude that has high input reduces; The final stage canal capacity meter of invention is simple in structure, cheap, widely applies, and can save huge input; Simple structure, dismounting is moved very convenient, and flow circuit is used, and has reduced stolen probability; Need not training, only need simple explanation, just can skillfully use; Simple in structure, the probability that breaks down is little, the reliability height.
Description of drawings:
Fig. 1 is the vertical view that is placed in the final stage canal capacity meter on the channel.
Fig. 2 is the vertical cross section that is placed in the final stage canal capacity meter on the channel.
Fig. 3 is the circuit diagram of final stage canal capacity meter embodiment.
Embodiment:
The special-purpose water meter of a kind of final stage channel, as Fig. 1, shown in Figure 2, comprise: Transverse to the flow direction is across channel 1 top, two ends are individually fixed in symmetry and are placed in crossbeam 3 on the flowmeter support 2 of channel 1 both sides, anglec of rotation displacement transducer 4 is installed at middle part at flowmeter crossbeam 3, the rotating shaft 5 of anglec of rotation displacement transducer 4 is parallel to flowmeter crossbeam 3, the microcephaly of water droplet shape float 7 is fixed in connecting rod 6, the other end of connecting rod 6 is fixed in the rotating shaft 5 of anglec of rotation displacement transducer 4, the extension line 8 of anglec of rotation displacement transducer 4 is connected on the flow indicating gauge 9, and angular sensor 4 adopts the potentiometer type angle displacement sensor.
After channel 1 discharges water, float 7 rotates by the rotating shaft 5 of connecting rod 6 driven rotary angle displacement sensors 4, anglec of rotation displacement transducer 4 is converted to electric signal with the mechanical signal of rotary angle position, extension line 8 by anglec of rotation displacement transducer 4, be sent on the flow indicating gauge 9, make the deflection angle and the depth of water in the channel 1 of the dial plate pointer of flow indicating gauge 9 that relation one to one be arranged.To calculate or demarcate good respective water depth corresponding flow numerical value portrayal in advance on the dial plate of flow indicating gauge 9,, obtain the concrete numerical value of flow by reading the dial plate flow scale of the dial plate pointed on the flow indicating gauge 9.
The acquisition of flow scale is divided into two kinds of situations.Length forms open channel uniform flow during greater than 20 times of maximum water depths in the channel, with open channel uniform flow formula calculated flow rate.According to the different depth of waters in the channel, by the corresponding discharge of following formula calculating by channel, portrayal is on the dial plate of flow indicating gauge 9.
In the formula, Q---flow (m
3/ s);
A---discharge section area (m
2);
I---hydraulic slope is identical with longitudinal gradient at the bottom of the canal;
R---water-carrying section hydraulic radius (m),
X---wetted perimeter (m);
C---open channel thanks to just coefficient,
N---roughness coefficien can be surveyed, also can be with reference to following numerical value: during smooth plank, and n=0.012; During concrete, n=0.014; When the field stone piece is built by laying bricks or stones, n=0.015.
For non-open channel uniform flow, can select typical canal section, actual measurement obtains the depth of water---discharge relation curve, on this basis, according to the different depth of waters in the channel, intercept corresponding flow numerical value on this curve, portrayal is used for the flow measurement of similar canal section on the dial plate of flow indicating gauge 9.
The embodiment circuit as shown in Figure 3,1 is electric battery, 2,3 is anti-interference filtration electric capacity, 4 is circuit of three-terminal voltage-stabilizing integrated, 5 are that full scale adjusts potentiometer,, 6 is potentiometer type anglec of rotation displacement transducer, 7 is anti-shake filter capacitor, 8 is the pointer type D.C. voltmeter.
Claims (3)
1. irrigate the special-purpose water gaging device of final stage channel for one kind, comprise that Transverse to the flow direction is across channel (1) top, two ends are individually fixed in symmetry and are placed in crossbeam (3) on the flowmeter support (2) of channel (1) both sides, anglec of rotation displacement transducer (4) is installed at middle part at flowmeter crossbeam (3), the rotating shaft (5) of anglec of rotation displacement transducer (4) is parallel to flowmeter crossbeam (3), the microcephaly of water droplet shape float (7) is fixed in connecting rod (6), the other end of connecting rod (6) is fixed in the rotating shaft (5) of anglec of rotation displacement transducer (4), and the extension line (8) of anglec of rotation displacement transducer (4) is connected on the flow indicating gauge (9).
2. the special-purpose water gaging device of a kind of irrigation final stage channel according to claim 1, it is characterized in that: after channel (1) discharges water, float (7) rotates by the rotating shaft (5) of connecting rod (6) driven rotary angle displacement sensor (4), anglec of rotation displacement transducer (4) is converted to electric signal with the mechanical signal of rotary angle position, extension line (8) by anglec of rotation displacement transducer (4), be sent on the flow indicating gauge (9), make the deflection angle and the depth of water in the channel (1) of the dial plate pointer of flow indicating gauge (9) that relation one to one be arranged, to calculate or demarcate good respective water depth corresponding flow numerical value portrayal in advance on the dial plate of flow indicating gauge (9), by reading the dial plate flow scale of the dial plate pointed on the flow indicating gauge (9), obtain the concrete numerical value of flow.
3. the special-purpose water gaging device of a kind of irrigation final stage channel according to claim 1, it is characterized in that: described anglec of rotation displacement transducer (4) adopts the potentiometer type angle displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056862 CN102155960A (en) | 2011-03-10 | 2011-03-10 | Flowmeter for final-stage channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056862 CN102155960A (en) | 2011-03-10 | 2011-03-10 | Flowmeter for final-stage channel |
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| CN102155960A true CN102155960A (en) | 2011-08-17 |
Family
ID=44437542
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| CN 201110056862 Pending CN102155960A (en) | 2011-03-10 | 2011-03-10 | Flowmeter for final-stage channel |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267509A (en) * | 2013-05-16 | 2013-08-28 | 张广海 | Hanging box digital flow direction deflection angle indicator |
| CN104569480A (en) * | 2015-02-04 | 2015-04-29 | 西安科技大学 | Liquid impact force and flow velocity measuring instrument and measuring method thereof |
| CN105160075A (en) * | 2015-08-07 | 2015-12-16 | 太原理工大学 | Application of automatic flow measurement mathematical model for farmland irrigated area open channel |
| CN107478286A (en) * | 2016-06-08 | 2017-12-15 | 红塔烟草(集团)有限责任公司 | The flow detector and its flow rate testing methods of solid material conveying |
| CN108366204A (en) * | 2018-03-05 | 2018-08-03 | 山东锋士信息技术有限公司 | A kind of embedded stage-discharge calculates the Intelligent monitoring camera of model |
| CN108535440A (en) * | 2018-06-12 | 2018-09-14 | 中国农业科学院农田灌溉研究所 | A kind of intelligence groundwater monitoring device |
| CN108871465A (en) * | 2018-07-06 | 2018-11-23 | 北京建筑大学 | Pipeline buoyancy flowmeter |
| CN109883478A (en) * | 2019-03-06 | 2019-06-14 | 楼彩飞 | A kind of artificial open channel flow rate measuring device and its flow-measuring method |
| CN111238593A (en) * | 2020-01-23 | 2020-06-05 | 龙岩华禹水利水电建筑工程有限公司 | Pipeline flowmeter |
| CN111397671A (en) * | 2020-04-09 | 2020-07-10 | 杜宏宇 | Open type liquid flowmeter for unsteady multiphase flow |
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| US5343743A (en) * | 1988-07-28 | 1994-09-06 | Chapman Michael J L | Asymmetrical displacement flowmeter |
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| CN202041234U (en) * | 2011-03-10 | 2011-11-16 | 中国农业科学院农田灌溉研究所 | Flow meter of final-stage channel |
-
2011
- 2011-03-10 CN CN 201110056862 patent/CN102155960A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5343743A (en) * | 1988-07-28 | 1994-09-06 | Chapman Michael J L | Asymmetrical displacement flowmeter |
| CN2318609Y (en) * | 1997-11-13 | 1999-05-12 | 田景利 | Liquid flow sensor |
| WO2004018975A2 (en) * | 2002-08-26 | 2004-03-04 | Rsa Environmental, Inc. | Automated metering gate |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267509B (en) * | 2013-05-16 | 2015-04-22 | 张广海 | Hanging box digital flow direction deflection angle indicator |
| CN103267509A (en) * | 2013-05-16 | 2013-08-28 | 张广海 | Hanging box digital flow direction deflection angle indicator |
| CN104569480B (en) * | 2015-02-04 | 2018-10-16 | 西安科技大学 | A kind of liquid impulse force Flow speed measurer and its measurement method |
| CN104569480A (en) * | 2015-02-04 | 2015-04-29 | 西安科技大学 | Liquid impact force and flow velocity measuring instrument and measuring method thereof |
| CN105160075A (en) * | 2015-08-07 | 2015-12-16 | 太原理工大学 | Application of automatic flow measurement mathematical model for farmland irrigated area open channel |
| CN105160075B (en) * | 2015-08-07 | 2018-10-02 | 太原理工大学 | A kind of application of farmland irrigated area open channel measuring automatically flow mathematical model |
| CN107478286A (en) * | 2016-06-08 | 2017-12-15 | 红塔烟草(集团)有限责任公司 | The flow detector and its flow rate testing methods of solid material conveying |
| CN108366204A (en) * | 2018-03-05 | 2018-08-03 | 山东锋士信息技术有限公司 | A kind of embedded stage-discharge calculates the Intelligent monitoring camera of model |
| CN108535440A (en) * | 2018-06-12 | 2018-09-14 | 中国农业科学院农田灌溉研究所 | A kind of intelligence groundwater monitoring device |
| CN108871465A (en) * | 2018-07-06 | 2018-11-23 | 北京建筑大学 | Pipeline buoyancy flowmeter |
| CN109883478A (en) * | 2019-03-06 | 2019-06-14 | 楼彩飞 | A kind of artificial open channel flow rate measuring device and its flow-measuring method |
| CN111238593A (en) * | 2020-01-23 | 2020-06-05 | 龙岩华禹水利水电建筑工程有限公司 | Pipeline flowmeter |
| CN111238593B (en) * | 2020-01-23 | 2021-06-01 | 龙岩华禹水利水电建筑工程有限公司 | Pipeline flowmeter |
| CN111397671A (en) * | 2020-04-09 | 2020-07-10 | 杜宏宇 | Open type liquid flowmeter for unsteady multiphase flow |
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Application publication date: 20110817 |