CN100398997C - Stoploy type self circulation open-channel test groove - Google Patents
Stoploy type self circulation open-channel test groove Download PDFInfo
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- CN100398997C CN100398997C CNB2004100534128A CN200410053412A CN100398997C CN 100398997 C CN100398997 C CN 100398997C CN B2004100534128 A CNB2004100534128 A CN B2004100534128A CN 200410053412 A CN200410053412 A CN 200410053412A CN 100398997 C CN100398997 C CN 100398997C
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- 238000012360 testing method Methods 0.000 title abstract description 13
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- 230000000087 stabilizing effect Effects 0.000 abstract description 6
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Abstract
The present invention discloses a laminated beam self-circulation open-channel test groove which is provided with a self-circulation water supply tank in which a submersible pump is arranged, wherein a triangular weir water measuring groove is arranged on the self-circulation water supply tank, and a measuring cylinder, a water stabilizing plate and a triangular weir are arranged in the triangular weir water measuring groove. A water stabilizing hole is arranged in the side of the water stabilizing plate, and a water measuring weir probe is arranged on the upper part of the measuring cylinder. A pressure stabilizing water tank is connected with the submersible pump by a water delivery pipeline, and a test water groove is arranged on the upper part of the triangular weir water measuring groove, wherein the head of the test water groove is connected with the pressure stabilizing water tank, and the tail of the test water groove is provided with a porous tail gate and a water drainage groove. The bottom board of the test water groove is provided with a plurality of model installation holes, and the side wall of the groove body of the test water groove is provided with a valve groove. A measuring track is arranged on the upper part of the test water groove, and a measuring probe of the test water groove is arranged on the measuring track. The triangular weir is additionally provided with a triangular water measuring caliber rule. The present invention solves the problems of large area occupation of basic facilities, great investment, large energy consumption, complex operation, low efficiency and invisible teaching effect of a traditional open-channel test groove.
Description
Technical field
The present invention relates to the experimental measurement instrument, relate in particular to a kind of stoplog type self-loopa open channel experimental tank.
Background technology
Water movement is a kind of very complicated spontaneous phenomenon, for the situation of motive power existence and the rule of their development, so far the fine grasp of also failing, hydraulic model test is copied the substance material object exactly, according to similar criterion, contraction becomes model, according to its suffered main acting force, research experiment.In the hydraulic model test,, need build and put the open channel experimental tank,, describe or shoot with video-corder various current phenomenons in the experimentation by means of open channel experimental tank observation flow-shape for cooperating whole hinge to arrange or studying some two-dimensional flow problem.
Therefore, the open channel experimental tank, is extensively used in engineering fluid mechanics and hydraulics of open channels course experiment teaching and relevant scientific research field thereof as an experiment porch.Yet traditional open channel experimental tank exists certain drawback: one, and the infrastructure construction engineering is huge, except that building experimental tank, also need build independent water supply, steady water, unwatering system, and the hundreds of easily thousands of square meters of floor area drop into huge; Its two, the huge equipment operation maintenance that brings thus of equipment is also complicated, operating cost is also higher; Its three, equipment is huge, and is comparatively independent between each facility, disperse, teaching efficiency is not directly perceived.
Summary of the invention
The purpose of this invention is to provide a kind of stoplog type self-loopa open channel experimental tank.
It has the self-loopa supply tank, in the self-loopa supply tank, be provided with submersible pump, the triangular-notch weir flume is arranged on the self-loopa supply tank, be provided with in the triangular-notch weir flume and measure tube, water-stabilizing board and triangular-notch weir, water-stabilizing board's side direction has steady water hole, measure tube top and be provided with the weir chaining pin, being provided with submersible pump in water tank of voltage regulation and the self-loopa supply tank is connected with aqueduct, flow control valve is set on the aqueduct, the flow bypass valve, experimental trough is arranged on triangular-notch weir flume top, the experimental trough head is connected with water tank of voltage regulation, the experimental trough afterbody is provided with porous tail-gate and lower flume, the lower flume end opening enters the triangular-notch weir flume, and the experimental trough base plate is provided with a plurality of model mounting holes, and experimental trough groove body sidewall is provided with gate slot, experimental trough top arranges and measures track that the experimental trough chaining pin is placed in to be measured on the track.The used triangular-notch weir water gaging of triangular-notch weir slide calliper rule Ka Jiao is 90 °, is provided with on the slide calliper rule to eliminate the capillarity interior angle.
Advantage of the present invention:
1) change the huge practice of structure in the past, equipment carries the self-circulation system of water supply, steady water, backwater, has removed huge capital construction from;
2) realize the simplification of dwindling of experimental system, and adopted stoplog type structure, a covering device to take up an area of and only count square meter, greatly saved the experimental arrangement place;
3) adopted independent self-loopa water system, water supply installation is common submersible pump, and power consumptive province, and recycling experiment water body economize on resources.
4) an equipment facility layout is closely reasonable, and each functional areas function is straight obviously to be seen, and miniaturization device is easy and simple to handle, is suitable for the modern teaching requirement;
Description of drawings
Fig. 1 is a stoplog type self-loopa open channel experimental tank structural representation.
Fig. 2 is triangular-notch weir water gaging slide calliper rule structural representations.
Fig. 3 is a triangular-notch weir water gaging slide calliper rule work synoptic diagram.
Embodiment
Stoplog type self-loopa open channel experimental tank has self-loopa supply tank 1, in the self-loopa supply tank, be provided with submersible pump 18, triangular-notch weir flume 2 is arranged on the self-loopa supply tank 1, be provided with in the triangular-notch weir flume 2 and measure tube 11, water-stabilizing board 12 and triangular-notch weir 13, water-stabilizing board's 12 side direction have steady water hole, measure tube 11 tops and be provided with weir chaining pin 14, being provided with submersible pump 18 usefulness aqueducts 17 in water tank of voltage regulation 3 and the self-loopa supply tank is connected, flow control valve 15 is set on the aqueduct 17, flow bypass valve 16, experimental trough 4 is arranged on triangular-notch weir flume 2 tops, experimental trough 4 heads are connected with water tank of voltage regulation 3, experimental trough 4 afterbodys are provided with porous tail-gate 9 and lower flume 10, lower flume 10 end openings enter triangular-notch weir flume 2, experimental trough 4 base plates are provided with a plurality of model mounting holes 8, experimental trough 4 groove body sidewalls are provided with gate slot 5, experimental trough 4 tops arrange and measure track 7 that experimental trough chaining pin 6 is placed in to be measured on the track 7.Set up triangular-notch weir water gaging slide calliper rule 19 on the triangular-notch weir 13 in the triangular-notch weir flume 2, triangular-notch weir water gaging slide calliper rule Ka Jiao is 90 °, is provided with on the slide calliper rule to eliminate the capillarity interior angle.
The course of work of the present invention is: load the empirical model relevant with experimental project at experimental trough, test water submersible pump water lift in case in the self-loopa supply tank, after the water tank of voltage regulation voltage stabilizing, steadily enter experimental trough, walk around empirical model in the experimental trough, fall by the experimental trough afterbody and to enter the triangular-notch weir flume, measure overcurrent flow in the experimental trough by triangular-notch weir, water body again in the triangular-notch weir flume triangular-notch weir be back in the self-loopa supply tank.Use other measurement means, various current phenomenons in the experimentation are described or shot with video-corder to current through the empirical model fluidised form in the observation experiment tank.
Experimental principle
Open channel experimental tank of the present invention adopts the special triangular-notch weir in laboratory to measure flow, and its computing formula is:
Q＝15.42(Δh)
2.47 (cm
3/s) (1)
In the formula:
Q---triangular-notch weir overcurrent flow;
Current enter experimental trough through water tank of voltage regulation, and the back is by triangular-notch weir, and the centre no longer includes flow input, output, so experiment records triangular-notch weir overcurrent flow Q, and the water flow of model by experiment in the experimental trough of just can attaining the Way.If will given flow Q in the experimental trough be obtained by (1), (2)
By regulating flow control valve, flow bypass valve opening, make triangular-notch weir weir crest water level
Reach calculated value, just can obtain given flow Q.
Triangular-notch weir water gaging slide calliper rule of the present invention are specifically designed to measures triangular-notch weir weir crest elevation
Because there are capillarity in water and weir wall, local liquid level raises, and invents this novel triangular-notch weir water gaging slide calliper rule, interior angle is set on the slide calliper rule is used to eliminate capillarity.Measure triangular-notch weir weir crest elevation
Method is: slide calliper rule are adjacent to the triangular-notch weir wall place the triangle weir crest, slide calliper rule pinnacle and triangular-notch weir weir crest are in same elevation, by measuring tube to the water filling of triangular-notch weir flume, water level rises in the triangular-notch weir flume, when water level just in time reaches the slide calliper rule pinnacle, record slide calliper rule pinnacle elevation by the weir chaining pin and be triangular-notch weir weir crest elevation
Experiment content
Open channel experimental tank of the present invention in engineering fluid mechanics and hydraulics of open channels course experiment teaching and relevant scientific research field thereof, as cooperates whole hinge to arrange, study some two-dimensional flow problem etc. as an experiment porch, all can use.Often implementing experimental project has:
1) fluidised form experiment
In the open channel of gate downstream a barrier is set, regulating gate aperture, tail-gate drop to lowest part, start water pump, regulate flow Q lock downstream current and present the torrent state, its Fr＞1.Under the torrent, current can not upstream be propagated by the formed interference microwave of disturbance, and when current were flowed through barrier, the protuberance phenomenon appearred in the water surface.Suitably the rising tail-gate makes and forms submerge discharging flow under the lock.Current present the unhurried current state, and at this moment its Fr＜1 disturbs microwave energy upstream to propagate, when current are flowed through barrier, and drop in water surface.This flowing is called unhurried current.
2) weir flow experiment
Be provided with special mounting hole in the open channel experimental tank experimental trough of the present invention, be used to install different weirs type, as sharp-crested weir, practical weir, WES weir etc., no bank broad-crested weir, above-mentioned weir type is installed respectively, can carry out the weir flow experiment of different weirs type, measure different weir type coefficient of flow m, its computing formula is:
In the formula:
Q---overcurrent flow on the weir, the present invention is recorded by the triangle weir, sees formula (1), (2):
B---experimental trough width;
H
0---gross head on the weir,
H---weir head.
In addition, the present invention carries the triangular-notch weir measurement of discharge, but the experiment of double as triangle sharp-crested weir.
3) hydraulic jump experiment
Can measure complete hydraulic jump conjugate depth h ', h by experiment ", long L jumps
B, energy dissipation rate η, and can verify the theoretical formula that free hydraulic jump is calculated in the flat slope rectangular channel:
L
B＝6.1h
*
η＝ΔH
j/H
1
In the formula,
The energy loss of Δ Hj---hydraulic jump;
H
1---section total head before jumping.
Also can demonstrate far simultaneously drive, critical with flood three kinds of hydraulic jumps and and chopping jump, weak hydraulic jump, the oscillating jump distinguished different, stablize hydraulic jump and five kinds of kenel hydraulic jumps of strong hydraulic jump by Fr.
1) energy dissipating experiment
Be provided with special mounting hole in the open channel experimental tank experimental trough of the present invention, cooperate special bed hedgehopping formula energy dissipating experiment porch, by the engineering prototype data that is provided, carry out the energy dissipating experiment according to requirement of experiment, check is provided with the necessity of energy dissipating.And the rationality of check prototype energy dissipating waterpower design.Experimental project has: the experiment of disspation through hydraudic jimp pond, the experiment of disspation through hydraudic jimp bank, flip trajectory bucket, submerged bucket dissipator, bucket typed stilling etc.
2) other two-dimensional flow problem experiment
Open channel experimental tank of the present invention is as an experiment porch, except that can carrying out above-mentioned several experiments, also can carry out at engineering fluid mechanics and hydraulics of open channels course experiment teaching and relevant some other experimental studies of scientific research field thereof, start flow velocity experiment etc. as silt particle.
Claims (2)
1. stoplog type self-loopa open channel experimental tank, it is characterized in that it has self-loopa supply tank (1), in the self-loopa supply tank, be provided with submersible pump (18), triangular-notch weir flume (2) is arranged on the self-loopa supply tank (1), be provided with in the triangular-notch weir flume (2) and measure tube (11), water-stabilizing board (12) and triangular-notch weir (13), water-stabilizing board (12) side direction has steady water hole, measure tube (11) top and be provided with weir chaining pin (14), the submersible pump of establishing in water tank of voltage regulation (3) and the self-loopa supply tank (18) is connected with aqueduct (17), flow control valve (15) is set on the aqueduct (17), flow bypass valve (16), experimental trough (4) is arranged on triangular-notch weir flume (2) top, experimental trough (4) head is connected with water tank of voltage regulation (3), experimental trough (4) afterbody is provided with porous tail-gate (9) and lower flume (10), lower flume (10) end opening enters triangular-notch weir flume (2), experimental trough (4) base plate is provided with a plurality of model mounting holes (8), experimental trough (4) groove body sidewall is provided with gate slot (5), experimental trough (4) top arranges and measures track (7) that experimental trough chaining pin (6) is placed in to be measured on the track (7).
2. according to the described a kind of stoplog type self-loopa open channel experimental tank of claim 1, it is characterized in that, set up triangular-notch weir water gaging slide calliper rule (19) on the triangular-notch weir (13) in the triangular-notch weir flume (2), triangular-notch weir water gaging slide calliper rule Ka Jiao is 90 °, is provided with on the slide calliper rule to eliminate the capillarity interior angle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534128A CN100398997C (en) | 2004-07-23 | 2004-07-23 | Stoploy type self circulation open-channel test groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534128A CN100398997C (en) | 2004-07-23 | 2004-07-23 | Stoploy type self circulation open-channel test groove |
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| CN1588491A CN1588491A (en) | 2005-03-02 |
| CN100398997C true CN100398997C (en) | 2008-07-02 |
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| CN106959137B (en) * | 2017-04-11 | 2023-05-02 | 南昌大学 | Experimental water tank head water measuring weir structure |
| CN106918444B (en) * | 2017-04-29 | 2019-03-29 | 西南交通大学 | Varible slope flume pilot system |
| CN107132023A (en) * | 2017-04-29 | 2017-09-05 | 西南交通大学 | Flat slope flume test system |
| CN107038946B (en) * | 2017-05-19 | 2019-02-22 | 中山大学 | A kind of intelligent open channel experimental system of multi-functional high flow rate |
| CN114525753B (en) * | 2022-02-23 | 2024-05-28 | 河南省科达水利勘测设计有限公司 | WES type composite weir transformation engineering experiment device |
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|---|---|---|---|---|
| CN2091449U (en) * | 1991-02-02 | 1991-12-25 | 上海华东热工仪表厂 | Weir type open canal sewage fluid meter |
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| CA2130056A1 (en) * | 1994-08-12 | 1996-02-13 | Robert Newbury | Streamlab hydraulic demonstration flume |
| RU2102707C1 (en) * | 1992-03-25 | 1998-01-20 | Научно-производственное объединение по гидротехнике и мелиорации "Югмелиорация" | Process determining flow rate of water in open canal with prismatic bed |
| CN2747565Y (en) * | 2004-07-23 | 2005-12-21 | 浙江大学 | Stoplog type self-circulation open ditch experiment trough |
-
2004
- 2004-07-23 CN CNB2004100534128A patent/CN100398997C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091449U (en) * | 1991-02-02 | 1991-12-25 | 上海华东热工仪表厂 | Weir type open canal sewage fluid meter |
| RU2102707C1 (en) * | 1992-03-25 | 1998-01-20 | Научно-производственное объединение по гидротехнике и мелиорации "Югмелиорация" | Process determining flow rate of water in open canal with prismatic bed |
| CN2132158Y (en) * | 1992-04-20 | 1993-05-05 | 无锡市化工仪表厂 | Flowmeter for use in open ditch |
| CA2130056A1 (en) * | 1994-08-12 | 1996-02-13 | Robert Newbury | Streamlab hydraulic demonstration flume |
| CN2747565Y (en) * | 2004-07-23 | 2005-12-21 | 浙江大学 | Stoplog type self-circulation open ditch experiment trough |
Non-Patent Citations (2)
| Title |
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| 闸后水跃水流的数值模拟. 袁新民，毛根海，吴寿荣，唐锦春.水利学报，第5期. 1999 |
| 闸后水跃水流的数值模拟. 袁新民，毛根海，吴寿荣，唐锦春.水利学报，第5期. 1999 * |
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