CN107132023A - Flat slope flume test system - Google Patents

Flat slope flume test system Download PDF

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Publication number
CN107132023A
CN107132023A CN201710297765.XA CN201710297765A CN107132023A CN 107132023 A CN107132023 A CN 107132023A CN 201710297765 A CN201710297765 A CN 201710297765A CN 107132023 A CN107132023 A CN 107132023A
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CN
China
Prior art keywords
water
weir
tank
cistern
triangular
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Pending
Application number
CN201710297765.XA
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Chinese (zh)
Inventor
武小菲
武琨璐
张宇弛
武雷
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Southwest Jiaotong University
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Southwest Jiaotong University
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Priority to CN201710297765.XA priority Critical patent/CN107132023A/en
Publication of CN107132023A publication Critical patent/CN107132023A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M10/00Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels

Abstract

The present invention relates to non-uniform flow water surface profile technical field of experiment equipment.The invention discloses a kind of flat slope flume test system, including tank, pumping water device, cistern, broad-crested weir, it also includes the waterway circulating passage for connecting the tank and cistern, the horizontal channel that the waterway circulating passage includes being located in tank and installed for broad-crested weir, the exhalant canal for flowing into the intake tunnel of horizontal channel for the current in cistern and being flowed into for current in horizontal channel in cistern, the intake tunnel is connected with pumping water device and which is provided with the first steady water-bound, the second steady water-bound is sequentially provided with the exhalant canal, triangular-notch weir, it also includes the water level measurement system of measurement broad-crested weir water level and triangular-notch weir water level respectively, the intake tunnel is respectively equipped with the valve of control current break-make with horizontal channel.Streamflow regime that can be more under accurate simulation flat slope state using the present invention, accurate analysis and calculates water surface profile, and accurate reference data is provided for open channel design.

Description

Flat slope flume test system
Technical field
The present invention relates to non-uniform flow water surface profile technical field of experiment equipment, and in particular to a kind of flat slope flume test system System.
Background technology
Open channel is a kind of channel with Free Surface current, can be divided into natural open channel and artificial bright according to its formation Canal.Analysis and calculating water surface profile are to perform open channel design and the key issue about architectural design, wherein, because open channel is uniform The water surface profile of stream is parallel to the straight line at canal bottom, fairly simple, therefore it is non-uniform flow that open channel water surface profile, which mainly studies,. Non-uniform flow refers to the current that the flow velocity size of fluid and direction are continually changing along journey.
Flat slope flume test system uses broad-crested weir, and broad-crested weir forms the water surface at import and fallen, and is produced in the range of weir crest One section of gradual change for being approximately parallel to weir crest is flowed.Flat slope flume experiment system of the prior art generally comprises tank, water pump, storage Pond, broad-crested weir.Its shortcoming is that structure is relatively simple, and result of study is inaccurate, does not reach preferable test effect.
The content of the invention
It is more single to solve structure in the prior art it is a primary object of the present invention to provide flat slope flume test system One, result of study is inaccurate, the problem of not reaching preferable test effect.
To achieve these goals, flat slope flume test system of the present invention, including tank, pumping water device, cistern, Kuan Ding Weir, it is characterised in that it also includes the waterway circulating passage for connecting the tank and cistern, the waterway circulating passage includes In tank and for broad-crested weir install horizontal channel, in cistern current flow into horizontal channel intake tunnel and The exhalant canal flowed into for current in horizontal channel in cistern, the intake tunnel is connected with pumping water device and which is provided with the The second steady water-bound, triangular-notch weir are sequentially provided with one steady water-bound, the exhalant canal, it also includes measuring broad-crested weir water respectively Position and the water level measurement system of triangular-notch weir water level, the intake tunnel are respectively equipped with the valve of control current break-make with horizontal channel Door.
Further, erecting bed, the erecting bed two ends and separated by a distance point of inboard wall of cistern are provided with the tank Water stream channel is not reserved, and upper surface and the sink top of the erecting bed constitute horizontal channel, and erecting bed bottom side is opened If feed pipe and pumping water device, erecting bed one end water stream channel be respectively communicated with composition intake tunnel, the erecting bed bottom is another The triangular-notch weir gutter channel that the confession triangular-notch weir that side is opened up is installed is respectively communicated with composition with cistern, erecting bed other end water stream channel Exhalant canal.
Further, the flow that the valve of the control current break-make on the intake tunnel includes being arranged at feed pipe is adjusted Save valve.
Further, the valve of the control current break-make on the horizontal channel includes being arranged at the work of broad-crested weir water side Dynamic gate.
Further, the water level measurement system includes the triangular-notch weir water level for being arranged at triangular-notch weir water inlet end on exhalant canal Chaining pin cylinder and the needle water level gauge for being arranged at broad-crested weir water inlet end on horizontal channel.
Further, the described first steady water-bound is is oriented to the tube bundle of intake tunnel, and the second steady water-bound is guiding The tube bundle of exhalant canal.
Further, the tank is the sink structure that pmma material is constituted.
Further, the tank is connected with cistern by fixed support.
The present invention is compared to the beneficial effect of prior art:The present invention being capable of accurate simulation flat slope by said structure Streamflow regime under state, accurate analysis and calculating water surface profile, thus provides accurate reference experiment data for open channel design.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent Point will be set forth in part in the description, and partly will become apparent from the description below, or pass through the practice of the present invention Solve.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, specific implementation of the invention Mode, schematic description and description are used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is structural representation of the invention.
Fig. 2 is the structural representation on intermediate cam weir of the present invention.
Fig. 3 is the structural representation of the tube bundle of the first steady water-bound of composition and the second steady water-bound in the present invention.
Embodiment
It should be noted that in the case where not conflicting, embodiment, embodiment in the application and therein Feature can be mutually combined.Let us now refer to the figures and combine herein below and describe the present invention in detail.
In order that those skilled in the art are better understood from the present invention program, below in conjunction with specific embodiment party of the present invention Accompanying drawing in formula, embodiment, clear, complete description is carried out to the technical scheme in the specific embodiment of the invention, embodiment, Obviously, described embodiment is only the embodiment of a branch of the invention, rather than whole embodiments.Based in the present invention Embodiment, embodiment, what those of ordinary skill in the art were obtained on the premise of creative work is not made Every other embodiment, embodiment, should all belong to the scope of protection of the invention.
It should be noted that the broad-crested weir used in the present invention refers to the thickness on weir for 2~10 times of weir heads, weirs Top water surface curve have one section be approximately horizontal segment weir.
Flat slope flume test system of the present invention, including tank 1, pumping water device 9, cistern 2, broad-crested weir 32, it also includes The waterway circulating passage of the tank 1 and cistern 2 is connected, the waterway circulating passage includes being located in tank 1 and for wide top Horizontal channel B, the intake tunnel A for the current inflow horizontal channel B in cistern 2 and supply horizontal channel B that weir 32 is installed The exhalant canal C that middle current are flowed into cistern 2, the intake tunnel A are connected with pumping water device 9 and which is provided with the first steady water The second steady water-bound 33, triangular-notch weir 34 are sequentially provided with structure 31, the exhalant canal C, it also includes measuring broad-crested weir respectively The water level measurement system of 32 water levels and the water level of triangular-notch weir 34, the intake tunnel A and horizontal channel B is respectively equipped with control current The valve of break-make.
Be provided with erecting bed 10 in the tank 1, the two ends of erecting bed 10 with the inwall of tank 1 is separated by a distance stays respectively Go out water stream channel, upper surface and the top of tank 1 of the erecting bed 10 constitute horizontal channel B, the bottom side of erecting bed 10 The feed pipe opened up is respectively communicated with composition intake tunnel A, the erecting bed with pumping water device 9, one end water stream channel of erecting bed 10 The gutter channel 1 of triangular-notch weir 34 and cistern 2, the other end current of erecting bed 10 that the confession triangular-notch weir 34 that 10 bottom opposite sides are opened up is installed Passage is respectively communicated with composition exhalant canal C.
The valve of control current break-make on the intake tunnel A includes being arranged on the flow control valve at feed pipe 71 61。
The valve of control current break-make on the horizontal channel B includes the movable gate for being arranged at the water side of broad-crested weir 32 62。
The water level measurement system includes the triangular-notch weir needle water level gauge cylinder for being arranged at the water inlet end of triangular-notch weir 34 on exhalant canal C 52 and it is arranged at the needle water level gauge 51 of the water inlet end of broad-crested weir 32 on the B of horizontal channel.
The first steady water-bound 31 is is oriented to intake tunnel A tube bundle, and the second steady water-bound 33 is guiding water outlet The tube bundle of channel C.
The tank 1 is the structure of tank 1 that pmma material is constituted.
The tank 1 is connected with cistern 2 by fixed support 8.
As shown in figure 1, flat slope flume test system is up-down structure in present embodiment, include the cuboid on top An erecting bed 10, the two ends of erecting bed 10 and tank 1 are provided with shape tank 1 and bottom rectangular-shape cistern 2, the tank 1 Inwall is separated by a distance, i.e., the two ends of erecting bed 10 do not connect with the inwall of tank 1, and current are thus reserved respectively and are led to Pumping water device 9 is provided with road, cistern 2, the pumping water device 9 is a water pump.
The upper surface of the erecting bed 10 constitutes horizontal channel B, the upper surface middle part of the erecting bed 10 with the top of tank 1 Position is provided with broad-crested weir 32, and the water inlet end of broad-crested weir 32 is provided with needle water level gauge 51, and the needle water level gauge 51 is fixed on tank 1 and pushed up Portion.
The feed pipe 71 that the bottom side of erecting bed 10 is opened up and pumping water device 9, one end water stream channel point of erecting bed 10 Intake tunnel A Lian Tong not be constituted, the feed pipe 71 is inverted L shape water pipe, water inlet and the phase of pumping water device 9 of the feed pipe 71 Even, vertical the first steady water-bound 33 being provided with for steady water and wave absorption on the water stream channel of described one end of erecting bed 10.It is described enter Aquaporin A is connected with horizontal channel B water inlet end.
The triangular-notch weir gutter channel 72 and cistern 2 of the installation of confession triangular-notch weir 34 that the bottom opposite side of erecting bed 10 is opened up, The other end water stream channel of erecting bed 10 is respectively communicated with composition exhalant canal C.The triangular-notch weir gutter channel 72 is a rectangular-shape stream The delivery port of cistern 2 is communicated with tank, triangular-notch weir gutter channel 72, the triangular-notch weir 34 is disposed in proximity to the position of delivery port Put, the middle part of the triangular-notch weir gutter channel 72, which is provided with, is used for the triangular-notch weir needle water level gauge cylinder for measuring water level at the water inlet of triangular-notch weir 34 52, it is provided with for steady water and wave absorption in the intersection level of triangular-notch weir gutter channel 72 and the other end water stream channel of erecting bed 10 Two steady water-bounds 33, the exhalant canal C is connected with horizontal channel B water side.As shown in Fig. 2 the triangular-notch weir 34 is to set There is the hardened structure of inverted triangle breach.
Wherein, the tank 1 is connected with cistern 2 by the fixed support 8 of stainless steel.As shown in figure 3, described first is steady The steady water-bound 33 of water-bound 31 and second is constituted by the pipeline f tube bundles stacked, and the first steady water-bound 31 is vertical The tube bundle of setting, the second steady water-bound 33 is horizontally disposed tube bundle.
Further is made to flat slope flume test system of the present invention below by way of the flat slope flume test implemented using the present invention Explanation.
The experimental principle of the present invention is as follows:
The calculation formula of broad-crested weir efflux coefficient is:
Broad crested weirs flow coefficient of discharge m calculation formula is:
Free style
Submerged
In formula, Q is broad-crested weir spillway discharge;B is that weir is wide;Hc is the weir crest necked-down section depth of water;H0 is acting head on weir;
σ s are to flood coefficient.
Wherein
In formula, ▽ 0 is elevation of weir crest;▽ 1 is water level before weir;▽ 2 is weir bottom elevation;
v0For mean velocity in section at flume import.
Empirical flow Q is measured by triangular-notch weir, and the flow formula of triangular-notch weir is
Q=AhB
In formula,WithIt is constant when respectively the actual measurement of triangular-notch weir flood level and triangular-notch weir starting water level are tested;
Specific test procedure
(1) relevant constant is recorded;Determine record weir bottom elevationElevation of weir crest
(2) switch on power, regulation flow control valve 61 and movable gate 62 are allowed to be formed free discharge under weir, simultaneously full Foot 2.5 < δ/H < 10 condition, observes the mobility status of the free overflow of broad-crested weir 32, qualitative to draw its water surface curve.
(3) after after waterflow stabilization, with water surface absolute altitude at the 3-5 times of H of upstream face on weir of dissociating on the measuring weir of needle water level gauge 51 With the water surface absolute altitude hc of weir crest necked-down section.
(4) need to treat 5 minutes or so after after the water level complete stability in triangular-notch weir 34 and chaining pin cylinder 52, survey in note chaining pin cylinder 52 Water surface absolute altitude
(5) experiment parameter under 61 apertures of flow control valve, 4~6 different flows of measurement is changed.
(6) movable gate 62 is adjusted, the level of tail water is raised, the overflow of broad-crested weir 32 is gradually become submerged from free style, Examine broad-crested weir 32 and flood process and overflow phenomena.
(7) experiment is finished, and closes flow control valve 61 and pumping water device 9.
(8) Experiment Data Records are referred to
Record relevant constant:The wide b in weir, weir thickness δ, the high P in weir, upstream weir bottom elevationElevation of weir crestTriangular-notch weir is originated Water levelCalibration constant.
Record measured test data, including triangular-notch weir upper pond levelMeasured discharge Q, weir upper pond levelWeir crest water Head H, approach velocity v0, kinetic head v0 2/ 2g, weir crest water levelWeir crest necked-down section depth of water hc, efflux coefficient
(9) Experiment Result requirement and analysis
According to measured discharge Q and weir head H and weir crest necked-down section depth of water hc etc., broad-crested weir flow velocity system is calculated by formula NumberAnd be compared with its empirical value 0.85~0.95, according to measured discharge Q and weir head H etc., broad-crested weir is calculated by formula Discharge coefficient m.
Streamflow regime that can be under accurate simulation flat slope state using the present invention, accurate analysis and calculates water surface profile, by This provides accurate reference experiment data for open channel design, with higher reference value.

Claims (8)

1. flat slope flume test system, including tank (1), pumping water device (9), cistern (2), broad-crested weir (32), its feature exist In it also includes connecting the tank (1) and the waterway circulating passage of cistern (2), and the waterway circulating passage includes being located at The horizontal channel (B) installed in tank (1) and for broad-crested weir (32), for the current in cistern (2) flow into horizontal channel (B) Intake tunnel (A) and the exhalant canal (C) flowed into for current in horizontal channel (B) in cistern (2), the intake tunnel (A) it is connected with pumping water device (9) and which is provided with and is sequentially provided with second on the first steady water-bound (31), the exhalant canal (C) Steady water-bound (33), triangular-notch weir (34), it also includes the water of measurement broad-crested weir (32) water level and triangular-notch weir (34) water level respectively Level measuring system, the intake tunnel (A) is respectively equipped with the valve of control current break-make with horizontal channel (B).
2. flat slope flume test system as claimed in claim 1, it is characterised in that erecting bed is provided with the tank (1) (10), erecting bed (10) two ends with tank (1) inwall is separated by a distance reserves water stream channel, the erecting bed respectively (10) upper surface at the top of tank (1) with constituting horizontal channel (B), the feed pipe that erecting bed (10) the bottom side is opened up (71) composition intake tunnel (A), the erecting bed are respectively communicated with pumping water device (9), erecting bed (10) one end water stream channel (10) the triangular-notch weir gutter channel (72) that the confession triangular-notch weir (34) that bottom opposite side is opened up is installed and cistern (2), erecting bed (10) Other end water stream channel is respectively communicated with composition exhalant canal (C).
3. flat slope flume test system as claimed in claim 2, it is characterised in that the control water on the intake tunnel (A) The disconnected valve of circulation includes the flow control valve (61) for being arranged on feed pipe (71) place.
4. flat slope flume test system as claimed in claim 2, it is characterised in that the control water on the horizontal channel (B) The disconnected valve of circulation includes the movable gate (62) for being arranged at broad-crested weir (32) water side.
5. flat slope flume test system as claimed in claim 1, it is characterised in that the water level measurement system includes being arranged at The triangular-notch weir needle water level gauge cylinder (52) of triangular-notch weir (34) water inlet end and it is arranged on exhalant canal (C) on horizontal channel (B) wide Push up the needle water level gauge (51) of weir (32) water inlet end.
6. flat slope flume test system as claimed in claim 1, it is characterised in that the first steady water-bound (31) is guiding The tube bundle of intake tunnel (A), the second steady water-bound (33) is the tube bundle for being oriented to exhalant canal (C).
7. flat slope flume test system as claimed in claim 1, it is characterised in that the tank (1) is pmma material Tank (1) structure of composition.
8. flat slope flume test system as claimed in claim 1, it is characterised in that the tank (1) passes through with cistern (2) Fixed support (8) is connected.
CN201710297765.XA 2017-04-29 2017-04-29 Flat slope flume test system Pending CN107132023A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108680237A (en) * 2018-03-30 2018-10-19 无锡航征科技有限公司 A kind of multifunction test platform and its test method
CN109898462A (en) * 2019-03-12 2019-06-18 蚌埠学院 A kind of lock weir aerial drainage imitative experimental appliance and its experimental method
CN111312038A (en) * 2020-03-25 2020-06-19 河海大学 Water tank water inlet multi-water-pipe energy dissipation and flow stabilization system and operation method
CN111307410A (en) * 2019-12-02 2020-06-19 哈尔滨工程大学 Ship model towing tank wave absorption system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0894488A (en) * 1994-09-28 1996-04-12 Mitsubishi Heavy Ind Ltd Two layer flow tester
CN1588491A (en) * 2004-07-23 2005-03-02 浙江大学 Stoploy type self circulation open-channel test groove
JP2005279387A (en) * 2004-03-29 2005-10-13 Kubota Corp Flooding weir fixing structure
CN103243676A (en) * 2013-05-21 2013-08-14 河海大学 System for confirming vegetation bed bottom resistance and confirming method
CN106120639A (en) * 2015-09-10 2016-11-16 西南石油大学 A kind of sea pipe leakage of oil buoyance lift of simulating migrates and the experimental provision reclaimed and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0894488A (en) * 1994-09-28 1996-04-12 Mitsubishi Heavy Ind Ltd Two layer flow tester
JP2005279387A (en) * 2004-03-29 2005-10-13 Kubota Corp Flooding weir fixing structure
CN1588491A (en) * 2004-07-23 2005-03-02 浙江大学 Stoploy type self circulation open-channel test groove
CN103243676A (en) * 2013-05-21 2013-08-14 河海大学 System for confirming vegetation bed bottom resistance and confirming method
CN106120639A (en) * 2015-09-10 2016-11-16 西南石油大学 A kind of sea pipe leakage of oil buoyance lift of simulating migrates and the experimental provision reclaimed and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108680237A (en) * 2018-03-30 2018-10-19 无锡航征科技有限公司 A kind of multifunction test platform and its test method
CN109898462A (en) * 2019-03-12 2019-06-18 蚌埠学院 A kind of lock weir aerial drainage imitative experimental appliance and its experimental method
CN111307410A (en) * 2019-12-02 2020-06-19 哈尔滨工程大学 Ship model towing tank wave absorption system
CN111312038A (en) * 2020-03-25 2020-06-19 河海大学 Water tank water inlet multi-water-pipe energy dissipation and flow stabilization system and operation method

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Application publication date: 20170905