CN206740360U - A kind of experimental tank - Google Patents
A kind of experimental tank Download PDFInfo
- Publication number
- CN206740360U CN206740360U CN201720242358.4U CN201720242358U CN206740360U CN 206740360 U CN206740360 U CN 206740360U CN 201720242358 U CN201720242358 U CN 201720242358U CN 206740360 U CN206740360 U CN 206740360U
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- China
- Prior art keywords
- tank
- water
- weir
- inlet
- turnaround section
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Abstract
The utility model discloses a kind of experimental tank, including inlet water tank, band turnaround section tank, water tank, storage tank, water pump and tracer ball, inlet water tank to be provided with water inlet and the first rectangle thin-wall weir, and water tank is provided with delivery port and the second rectangle thin-wall weir；Inlet water tank, band turnaround section tank and water tank sequentially connect, and storage tank is connected with water inlet, delivery port respectively by connecting tube；Water pump is located in the connecting tube between inlet water tank and storage tank；Tracer ball is located in band turnaround section tank.The utility model is simple in construction, cost is cheap, vdiverse in function；Water inlet, water flow in accurate control tank during measurement water level, measurement mean velocity in vertical experiment, guarantee test condition-steady flow；Need to only measure weir head at sharp-crested weir can formula obtain flow；Current trace is shown by tracer ball, describes the water movement rule of turnaround section, phenomenon is clear；Tracer ball does not influence water quality, is reclaimed by baffle of porous baffle, can be achieved to recycle.
Description
Technical field
The utility model is to be related to a kind of experimental tank, and flow and clear can accurately be controlled by concretely relating to one kind
Observe the experimental tank of flow-shape.
Background technology
Possessing the colleges and universities of port boat specialty needs to deepen student to courses such as hydraulics, river dynamics by water flow test
The understanding of knowledge.The existing experimental facilities of Some Universities is only capable of meeting some element tasks, such as directly from water pump into experimental tank
Add water, the water level of a certain section left, center, right in tank is measured by ruler, sets up rotation oar respectively at section left, center, right three
Formula current meter measures mean velocity in vertical, instills red ink in the sink or is put into wood chip to observe flow-shape.Existing examination
The intake-outlet flow of unmeasured tank ensures flow of water constant during testing, if current are non-constant, measured water in experiment
Stream statistics rule does not just have practical significance.In addition, the red ink added, wood chip are difficult to separate out from water, it is not easy to recycle
And easily make tank attachment red after placing for a long time or produce peculiar smell.
Utility model content
Purpose of utility model：To overcome the shortcomings of the existing technology, the utility model purport is in a kind of experimental tank of offer.
Technical scheme：In order to solve the above technical problems, the utility model adopts the following technical scheme that：
A kind of experimental tank, including inlet water tank, band turnaround section tank, water tank, storage tank, water pump and tracer ball, it is described
Inlet water tank is provided with water inlet and the first rectangle thin-wall weir, and water tank is provided with delivery port and the second rectangle thin-wall weir；The inlet water tank,
Band turnaround section tank and water tank sequentially connect, and storage tank is connected with water inlet, delivery port respectively by connecting tube；Water pump is located at
In connecting tube between inlet water tank and storage tank；Tracer ball is located in band turnaround section tank.
Operation principle：After the utility model experimental tank experimental tank to inlet water tank by adding water to a certain extent, measurement
Weir head at first rectangle thin-wall weir and the second rectangle thin-wall weir, formula are calculated into turnaround section tank
The flow of flow and elution band turnaround section tank, compare flow at two it is whether equal can determine whether band turnaround section tank in whether be
Steady flow；Current are determined after steady flow, to carry out water level with normal experiment instrument, flow velocity measures routine test；Again will be conventional real
Instrument taking-up is tested, keeps flow of water constant, tracer ball is added into inlet water tank, tracer ball is floated in water, with cameras record tracer ball
State straight section, the water movement rule of turnaround section can be described intuitively；Analyzed for the cross current of turnaround section, band turns
The problems such as groynes recirculating zone scope after groynes, circulating flow strength, recirculating zone morphological analysis are put into curved segment tank can have more
Clearly explain.
The band turnaround section tank is provided with breather pipe.During due to calculating discharge coefficient, it is desirable to which weir flow overflow lower edge is big
Air pressure is strong, and otherwise overflow lower air can be taken away to form negative pressure by current, the discharge coefficient being calculated and actual flow system
Number, which can produce relatively large deviation, influences flow rate calculation precision, and breather pipe is used to ensure pressure requirement.
First rectangle thin-wall weir and the second rectangle thin-wall weir overflow width are identical, and the first rectangle thin-wall weir weir height is higher than
Second rectangle thin-wall weir.Band turnaround section tank upstream and downstream can be made to have head difference, current are also easy to produce flowing, and experimental phenomena is brighter
It is aobvious.
Face water inlet position is provided with water fender in the inlet water tank.Can make water impact to plate backward water fender surrounding
Uniformly diffusion, keep waterflow stabilization.
With being provided with baffle of porous baffle with turnaround section tank junction in the water tank, baffle of porous baffle is uniformly provided with more than one
Circular hole, circular hole aperture are less than tracer bulb diameter.Tracer ball can be collected from baffle of porous baffle after off-test, tracer ball can be made
Reuse, do not influence water quality so as to reach and recycle.
The tracer ball is that density is 1g/cm3Whiteness tracer ball.Whiteness tracer ball can be made to be suspended in water, use camera
The state of record whiteness tracer ball can intuitively describe straight section, the water movement rule of turnaround section.
Analyzed for the cross current of turnaround section, with being put into the groynes recirculating zone scope after groynes in turnaround section tank, return
The problems such as intensity of flow, recirculating zone morphological analysis, which can have, more clearly explains.
The test method of above-mentioned experimental tank, comprises the following steps：
(1) on-test, open water pump, from storage tank plus water enter inlet water tank, because water-aspirator pressure is larger, can make into
The trend of the oriented upper punching of current in water, water fender makes water impact, and to plate, backward water fender surrounding uniformly spreads, and keeps current
It is stable；
(2) through after a while plus water, weir head H, the first rectangle are formed in inlet water tank on the first rectangle thin-wall weir
The overflow width of sharp-crested weir is less than the width with turnaround section tank, and weir flow herein shrinks for free discharge and without side, according to
Formula：
In formula：Q is flow, m0For discharge coefficient, B is overflow width, and g is acceleration of gravity, and H is weir head, and a is weir
It is high；
It can try to achieve into the flow Q1 with turnaround section tank；
When calculating discharge coefficient with formula (2), it is desirable to which weir flow overflow lower edge is atmospheric pressure, otherwise overflow lower air meeting
Taken away to form negative pressure by current, the discharge coefficient being calculated can produce relatively large deviation with actual discharge coefficient influences flowmeter
Precision is calculated, ensures pressure requirement by setting breather pipe, similarly, similar weir flow can be also formed with turnaround section tank afterbody,
The overflow width of first rectangle thin-wall weir and the second rectangle thin-wall weir is identical, and weir is high different, and the weir of the first rectangle thin-wall weir is high
In the second rectangle thin-wall weir, band turnaround section tank upstream and downstream is set to have head difference, current are also easy to produce flowing, and experimental phenomena is brighter
It is aobvious；
The width of water tank is more than the overflow width of the second rectangle thin-wall weir, and the weir flow at the second rectangle thin-wall weir is freely
Go out stream and shunk without side, the flow Q2 of elution band turnaround section tank is calculated with formula (1), (2)；
When the flow Q1 and Q2 at first, second rectangle thin-wall weir is calculated during experiment, due in formula (1), (2) except
Weir head H other specifications are definite value, therefore experiment need to only measure the weir head at first, second rectangle thin-wall weir every time
H；
Compare Q1 and Q2 it is whether equal can determine whether band turnaround section tank in whether be steady flow；
(3) current are determined after steady flow, to carry out water level with normal experiment instrument, flow velocity measures routine test；
(4) normal experiment instrument is taken out, keeps flow of water constant, it is 1g/cm that density is added into inlet water tank3White show
Track ball, because whiteness tracer ball density and aqueous phase are same, whiteness tracer ball is suspended in water, with the shape of cameras record whiteness tracer ball
State can intuitively describe straight section, the water movement rule of turnaround section；
Analyzed for the cross current of turnaround section, with being put into the groynes recirculating zone scope after groynes in turnaround section tank, return
The problems such as intensity of flow, recirculating zone morphological analysis, which can have, more clearly explains.
After off-test, whiteness tracer ball is collected from baffle of porous baffle, current flow into storage tank by delivery port, then by water pump
Add inlet water tank.The whiteness tracer ball being collected into can also carry out repeating experiment not influenceing water quality so as to reach and recycle.
The NM technology of the utility model is prior art.
Beneficial effect：Compared with prior art, the beneficial effects of the utility model are：
(1) water is accurately controlled by rectangle thin-wall weir during common survey water level, measurement mean velocity in vertical experiment
Water inlet, water flow, guarantee test condition-steady flow in groove；
(2) need to only be measured during testing weir head at sharp-crested weir can formula obtain flow, it is easy and close
Reason；
(3) current trace is shown by whiteness tracer ball, describes the water movement rule of turnaround section, phenomenon is clear；
(4) whiteness tracer ball does not influence water quality, is reclaimed by baffle of porous baffle, can be achieved to recycle；
(5) apparatus structure is simple, cost is cheap, vdiverse in function.
Brief description of the drawings
Fig. 1 is the utility model experimental tank structural representation；
Fig. 2 is A-A sectional drawings in Fig. 1；
Fig. 3 is B-B sectional drawings in Fig. 1；
Fig. 4 is weir formula schematic diagram；
In figure, 1 be inlet water tank, 2 be band turnaround section tank, 3 be breather pipe, 4 be water tank, 5 be storage tank, 6 be water pump,
7 it is tracer ball, 8 be water inlet, 9 be water fender, 10 be the first rectangle thin-wall weir, 11 be the second rectangle thin-wall weir, 12 is with holes
Baffle plate, 13 are delivery port.
Embodiment
In order to more fully understand the utility model, content of the present utility model is furtherd elucidate with reference to embodiment, but
Content of the present utility model is not limited solely to the following examples.
Embodiment 1
As Figure 1-4, a kind of experimental tank, including inlet water tank 1, band turnaround section tank 2, water tank 4, storage tank 5, water
Pump 6 and tracer ball 7, the inlet water tank 1 are provided with the rectangle thin-wall weir 10 of water inlet 8 and first, and water tank 4 is provided with delivery port 13 and the
Two rectangle thin-wall weirs 11；The inlet water tank 1, band turnaround section tank 2 and water tank 4 sequentially connect, and storage tank 5 passes through connecting tube point
Do not connect with water inlet 8, delivery port 13；Water pump 6 is located in the connecting tube between inlet water tank 1 and storage tank 5；Tracer ball 7 is located at
In band turnaround section tank 2；Band turnaround section tank 2 is provided with breather pipe 3；First rectangle thin-wall weir 10 and the second rectangle thin-wall weir 11
Overflow width is identical, and the weir of the first rectangle thin-wall weir 10 height is higher than the second rectangle thin-wall weir 11；Face water inlet 8 in inlet water tank 1
Water fender 9 is installed；With being provided with baffle of porous baffle 12 with the junction of turnaround section tank 2 in water tank 4, baffle of porous baffle 12 is uniformly provided with
More than one circular hole, circular hole aperture are less than the diameter of tracer ball 7；Tracer ball 7 is that density is 1g/cm3Whiteness tracer ball 7.
After the utility model experimental tank to inlet water tank 1 by adding water to a certain extent, the first rectangle thin-wall weir 10 is measured
With the weir head at the second rectangle thin-wall weir 11, formula is calculated into the flow with turnaround section tank 2 and outflow
Flow with turnaround section tank 2, compares whether flow at two is equal to can determine whether in band turnaround section tank 2 be steady flow；
Current are determined after steady flow, to carry out water level with normal experiment instrument, flow velocity measures routine test；Normal experiment instrument is taken again
Go out, keep flow of water constant, it is 1g/cm that density is added into inlet water tank 13Whiteness tracer ball 7, due to the density of whiteness tracer ball 7
Same with aqueous phase, whiteness tracer ball 7 is suspended in water, can intuitively be described with the state of cameras record whiteness tracer ball 7 straight
Section, the water movement rule of turnaround section；Analyzed for the cross current of turnaround section, after groynes is put into turnaround section tank 2
The problems such as groynes recirculating zone scope, circulating flow strength, recirculating zone morphological analysis, which can have, more clearly explains.
The test method of above-mentioned experimental tank, comprises the following steps：
(1) on-test, water pump 6 is opened, from storage tank 5 plus water enters inlet water tank 1, because the pressure of water pump 6 is larger, meeting
The trend of the oriented upper punching of current in making into water, water fender 9 makes water impact, and to plate, the backward surrounding of water fender 9 uniformly spreads, and protects
Hold waterflow stabilization；
(2) through after a while plus water, weir head H, the first square are formed in inlet water tank 1 on the first rectangle thin-wall weir 10
The overflow width of shape sharp-crested weir 10 is less than the width with turnaround section tank 2, and weir flow herein shrinks for free discharge and without side,
According to formula：
In formula：Q is flow, m0For discharge coefficient, B is overflow width, and g is acceleration of gravity, and H is weir head, and a is weir
It is high；
It can try to achieve into the flow Q1 with turnaround section tank 2；
When calculating discharge coefficient with formula (2), it is desirable to which weir flow overflow lower edge is atmospheric pressure, otherwise overflow lower air meeting
Taken away to form negative pressure by current, the discharge coefficient being calculated can produce relatively large deviation with actual discharge coefficient influences flowmeter
Precision is calculated, ensures pressure requirement by setting breather pipe 3, similarly, similar weir can be also formed with the afterbody of turnaround section tank 2
Stream, the first rectangle thin-wall weir 10 is identical with the overflow width of the second rectangle thin-wall weir 11, and weir is high different, the first rectangle thin-wall weir 10
Weir it is high be higher than the second rectangle thin-wall weir 11, the upstream and downstream of band turnaround section tank 2 is had head difference, current are also easy to produce flowing, test
Phenomenon is more obvious；
The width of water tank 4 is more than the overflow width of the second rectangle thin-wall weir 11, the weir flow at the second rectangle thin-wall weir 11
Shunk for free discharge and without side, the flow Q2 of elution band turnaround section tank 2 is calculated with formula (1), (2)；
Compare whether Q1 and Q2 is equal to can determine whether in band turnaround section tank 2 be steady flow.
(3) current are determined after steady flow, to carry out water level with normal experiment instrument, flow velocity measures routine test；
(4) normal experiment instrument is taken out, keeps flow of water constant, it is 1g/cm that density is added into inlet water tank 13White
Tracer ball 7, because the density of whiteness tracer ball 7 and aqueous phase are same, whiteness tracer ball 7 is suspended in water, with cameras record whiteness tracer
The state of ball 7 can intuitively describe straight section, the water movement rule of turnaround section；
Analyzed for the cross current of turnaround section, with being put into the groynes recirculating zone scope after groynes in turnaround section tank 2, return
The problems such as intensity of flow, recirculating zone morphological analysis, which can have, more clearly explains.
When the flow Q1 and Q2 at first, second rectangle thin-wall weir 11 is calculated during experiment, due to being removed in formula (1), (2)
Weir head H other specifications are definite value, therefore experiment need to be only measured on the weir at first, second rectangle thin-wall weir 11 every time
Head H.
After off-test, whiteness tracer ball 7 is collected from baffle of porous baffle 12, current flow into storage tank 5 by delivery port 13, then
Inlet water tank 1 is added by water pump 6.
The beneficial effects of the utility model are：
(1) water is accurately controlled by rectangle thin-wall weir during common survey water level, measurement mean velocity in vertical experiment
Water inlet, water flow, guarantee test condition-steady flow in groove；
(2) need to only be measured during testing weir head at sharp-crested weir can formula obtain flow, it is easy and close
Reason；
(3) current trace is shown by whiteness tracer ball 7, describes the water movement rule of turnaround section, phenomenon is clear；
(4) whiteness tracer ball 7 does not influence water quality, is reclaimed by baffle of porous baffle 12, can be achieved to recycle；
(5) apparatus structure is simple, cost is cheap, vdiverse in function.
It the above is only preferred embodiment of the present utility model, it should be pointed out that：For the ordinary skill people of the art
For member, on the premise of the utility model principle is not departed from, each facility locations can also be adjusted, these adjustment also should
It is considered as the scope of protection of the utility model.
Claims (6)
- A kind of 1. experimental tank, it is characterised in that：Including inlet water tank (1), band turnaround section tank (2), water tank (4), storage tank (5), water pump (6) and tracer ball (7), the inlet water tank (1) are provided with water inlet (8) and the first rectangle thin-wall weir (10), water tank (4) delivery port (13) and the second rectangle thin-wall weir (11) are provided with；The inlet water tank (1), band turnaround section tank (2) and water tank (4) sequentially connect, storage tank (5) is connected with water inlet (8), delivery port (13) respectively by connecting tube；Water pump (6) is located at into water In connecting tube between case (1) and storage tank (5)；Tracer ball (7) is located in band turnaround section tank (2).
- 2. experimental tank as claimed in claim 1, it is characterised in that：The band turnaround section tank (2) is provided with breather pipe (3)。
- 3. experimental tank as claimed in claim 2, it is characterised in that：First rectangle thin-wall weir (10) and the second Thin Rectangular Wall weir (11) overflow width is identical, and the first rectangle thin-wall weir (10) weir height is higher than the second rectangle thin-wall weir (11).
- 4. experimental tank as claimed in claim 2, it is characterised in that：Interior face water inlet (8) position of inlet water tank (1) is set There is water fender (9).
- 5. experimental tank as claimed in claim 2, it is characterised in that：With connecting with turnaround section tank (2) in the water tank (4) Meet place and be provided with baffle of porous baffle (12), baffle of porous baffle (12) is uniformly provided with more than one circular hole, and it is straight that circular hole aperture is less than tracer ball (7) Footpath.
- 6. the experimental tank as described in claim 1-5 any one, it is characterised in that：The tracer ball (7) is that density is 1g/ cm3Whiteness tracer ball (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720242358.4U CN206740360U (en) | 2017-03-14 | 2017-03-14 | A kind of experimental tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720242358.4U CN206740360U (en) | 2017-03-14 | 2017-03-14 | A kind of experimental tank |
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| Publication Number | Publication Date |
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| CN206740360U true CN206740360U (en) | 2017-12-12 |
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ID=60556533
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720242358.4U Expired - Fee Related CN206740360U (en) | 2017-03-14 | 2017-03-14 | A kind of experimental tank |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802228A (en) * | 2017-03-14 | 2017-06-06 | 河海大学 | A kind of experimental tank and its test method |
| CN113866452A (en) * | 2021-08-20 | 2021-12-31 | 河海大学 | Hydraulic energy equation flow velocity measurement experimental device and method |
-
2017
- 2017-03-14 CN CN201720242358.4U patent/CN206740360U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106802228A (en) * | 2017-03-14 | 2017-06-06 | 河海大学 | A kind of experimental tank and its test method |
| CN113866452A (en) * | 2021-08-20 | 2021-12-31 | 河海大学 | Hydraulic energy equation flow velocity measurement experimental device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20200314 |