CN208399303U - A kind of aeration concentrater measuring device - Google Patents
A kind of aeration concentrater measuring device Download PDFInfo
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- CN208399303U CN208399303U CN201821272272.7U CN201821272272U CN208399303U CN 208399303 U CN208399303 U CN 208399303U CN 201821272272 U CN201821272272 U CN 201821272272U CN 208399303 U CN208399303 U CN 208399303U
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- aeration concentrater
- energy dissipating
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Abstract
The utility model discloses a kind of aeration concentrater measuring devices, including influent stream system, Separate System of Water-jet, flow measuring system and survey gas system；Influent stream system is to be isolated measurand water body and the atmosphere in environment.Water phase and gas phase of the Separate System of Water-jet to separate measurand water body, including gas-liquid separating box, energy dissipating grid, overflow baffle, energy dissipating grid and overflow baffle are each attached to gas-liquid separating box lower inside, and overflow baffle is located at energy dissipating grid downstream；Gas-liquid separating box is equipped with entrance, gas outlet and water outlet, and sluicing chute is connected to entrance, and flow measuring system is connected to water outlet, surveys gas system and is connected to gas outlet.The measurement method of aeration concentrater measuring device disclosed by the utility model, water in aerated flow and gas phase are separated, and the volumes or flow of different separation phases are measured respectively, the accurate average aeration concentrater for calculating aerated flow solves the problems, such as that the aerated flow aeration concentrater that is averaged measures.
Description
Technical field
The utility model relates to hydraulic and hydroelectric engineering technical fields, and in particular to a kind of aeration concentrater measuring device.
Background technique
Water flow aeration phenomenon is widely present in various discharge structures: spillway for high water head, long process is let out
Hongdong, high-velocity flow, which will lead to, lets out slot structure cavitation destruction, is often reduced or remitted using aeration measure in engineering and lets out slot cavitation
Cavitation corrosion；In addition, water surface also has the generation of self aeration；The turbulent river crashes its way through in vertical shaft pipelines, turbulent fluctuation acutely can also be held under the arm into air, takes
Gas phenomenon is more complicated.Therefore, water flow aeration is always the important topic in multiphase fluid mechanics research, and Air Concentration in Water Flow is
It is extremely crucial accurately to measure Air Concentration in Water Flow for one of very important parameter in research.
Measurement about Air Concentration in Water Flow is carried out by the method for model test mostly.Air Concentration in Water Flow is to mix
The volume of gas accounts for the ratio of gas-vapor mix body volume in air water stream, if with VaIndicate the volume of gas in aerated flow, VwIt indicates
The volume of water in aerated flow, then aeration concentrater C may be expressed as:
But in actual measurement, it tends not to accurately obtain gas volume VaWith the volume V of waterw, so that aeration concentrater C
Calculating have very big error.
Currently, usually measuring the aeration concentrater of water flow by entrained air concentration meter in the research of hydraulic experiment room, pass through
The aeration concentrater of single-point water body in sink can be obtained in this mode.Entrained air concentration meter is mainly made of sensor, host and conducting wire,
It converts to obtain aeration concentrater by measuring resistance between electrode under water-air two phase flow and clear water two states, however, water
The variation of bulk resistor also will receive the influence of the factors such as water temperature, water quality, silt content, and therefore, the measurement accuracy of this method is not high.
Utility model content
The utility model embodiment is designed to provide a kind of aeration concentrater measuring device and method, existing to solve
The not high problem of aeration concentrater measurement method precision.
To achieve the above object, the utility model embodiment provides a kind of aeration concentrater measuring device, the aeration concentrater
Measuring device includes influent stream system, Separate System of Water-jet, flow measuring system and surveys gas system；The influent stream system includes sluicing chute
With sponge baffle, the sponge baffle plate setting is in the top of the sluicing chute；The Separate System of Water-jet includes gas-liquid separation
Case, energy dissipating grid, overflow baffle, the energy dissipating grid and overflow baffle are each attached to the gas-liquid separating box lower inside, institute
It states overflow baffle and is located at energy dissipating grid downstream；Entrance, gas outlet and water outlet are provided in the gas-liquid separating box, it is described
Sluicing chute is connected to the entrance, and the flow measuring system is connected to the water outlet, the survey gas system and the gas outlet
Connection.
Preferably, the energy dissipating grid is provided with multiple, and the surface of the energy dissipating grid is evenly distributed with several through-holes, the energy dissipating
Grid is vertical, interval is arranged.
Preferably, the overflow baffle includes transverse slat and overflow plate, and the transverse slat is horizontally fixed on the overflow plate and meets water
The top in face, the overflow plate are fixed on the bottom surface of the gas-liquid separating box, and the upstream face of the overflow plate is grid chamber in length and breadth
Room.
Preferably, the flow measuring system includes sequentially connected vertical shaft import, vertical shaft, watch window, horizontal pipe, described
Vertical shaft import is funnel-form, and the watch window is transparent material；The flow measuring system further includes water vapour sorting grid lattice, flowmeter
And water valve, the water vapour sorting grid lattice perpendicular to vertical shaft axis, be arranged at intervals in the vertical shaft, the flowmeter is arranged in institute
The downstream portion of horizontal pipe is stated, the end of the horizontal pipe is arranged in the water valve, is located at the flowmeter downstream.
Preferably, the survey gas system includes the downtake pipe being connected to the Separate System of Water-jet and second exhaust
Pipe, Active Interface, closed air bag, air valve, regulating valve, the closed air bag pass through the Active Interface and the downtake pipe
Nozzle connection, the closed air bag adapts to gas volume free extension；The pipe of the downtake pipe is arranged in the air valve
Between mouth and the Active Interface, the regulating valve is arranged in the second exhaust tube end.
The utility model embodiment also provides a kind of aeration concentrater measurement method, specifically includes the following steps: letting out to described
Water chute introduces water flow, adjusts the height of the sponge baffle, contacts its bottom surface with the water surface；Water flow flows into the gas-liquid separation
Case is overflowed by the energy dissipating grid energy dissipating from the overflow baffle top, realizes gas-liquid separation；After waterflow stabilization, pass through
The flow measuring system measures the liquid volume in the unit time, meanwhile, gas volume is measured by the survey gas system, foundation is mixed
Average aeration concentrater is calculated in the definition of gas concentration.
The utility model embodiment has the advantages that
A kind of aeration concentrater measuring device provided by the embodiment of the utility model, including influent stream system, Separate System of Water-jet,
Flow measuring system and survey gas system.Wherein, influent stream system includes sluicing chute and sponge baffle, and liquid can be formed in measurement process
Envelope reduces the interference of secondary water flow, reduces measurement error.Separate System of Water-jet includes gas-liquid separating box, energy dissipating grid, overflow gear
Plate integrates energy dissipating, gas collection, relief function, so that gas liquid is kept completely separate in aerated flow, improves measurement accuracy.It lets out
Water chute is connected to the entrance of gas-liquid separating box, and flow measuring system is connected to the water outlet of gas-liquid separating box, surveys gas system and gas-liquid
The connection of separator box gas outlet.Flow measuring system and survey gas system measure the volume of liquid phase and gas phase respectively, are by formula calculating
Aeration concentrater can be obtained, the measurement method principle based on the aeration concentrater measuring device is simple and convenient to operate, and measurement method is straight
It connects.
Detailed description of the invention
Fig. 1 is the longitudinal section for the aeration concentrater measuring device that the utility model embodiment 1 provides.
Fig. 2 is the cross-sectional view for the aeration concentrater measuring device that the utility model embodiment 1 provides.
Fig. 3 is the flow chart for the aeration concentrater measurement method that the utility model embodiment 1 provides.
Fig. 4 is the partial process view for the aeration concentrater measurement method that the utility model embodiment 1 provides.
Wherein, 1- sluicing chute, 2- sponge baffle, 3- gas-liquid separating box, 4- energy dissipating grid, 5- overflow baffle, 6- vertical shaft
Import, 7- vertical shaft, 8- watch window, 9- horizontal pipe, 10- water vapour sorting grid lattice, 11- flowmeter, 12- water valve, 13- first row
Tracheae, 14- Active Interface, the closed air bag of 15-, 16- air valve, 17- second exhaust pipe, 18- regulating valve.
Specific embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Figure 1 and Figure 2, aeration concentrater measuring device provided in this embodiment includes influent stream system, gas-liquid separation system
System, flow measuring system and survey gas system.
Influent stream system includes sluicing chute 1 and sponge baffle 2, and the top of sluicing chute 1, sponge is arranged in sponge baffle 2
2 upper-lower height of baffle is adjustable.In measurement process, the height of sponge baffle 2 is adjusted, makes its bottom and the experiment water body water surface just
Contact forms fluid-tight.Twice are arranged in usual 2 time interval of sponge baffle: first of sponge baffle is taken for intercepting influent stream water body
The flowing gas of band, second sponge baffle can separate gas downstream backtracking.
Separate System of Water-jet includes gas-liquid separating box 3, energy dissipating grid 4, overflow baffle 5, be provided in gas-liquid separating box 3 into
Mouth, gas outlet and water outlet, sluicing chute 1 are connected to entrance, and flow measuring system is connected to water outlet, survey gas system and gas outlet connects
It is logical.Energy dissipating grid 4 and overflow baffle 5 are each attached to gas-liquid separating box lower inside, and there are three the settings of energy dissipating grid 4, energy dissipating grid
The surface of lattice 4 is evenly distributed with several through-holes, generally vertical, interval setting；Overflow baffle 5 is located at the downstream of energy dissipating grid, overflow baffle 5
Including transverse slat and overflow plate, transverse slat is horizontally fixed on the top of overflow plate upstream face, and overflow plate is fixed on the bottom of gas-liquid separating box
Face, the upstream face of overflow plate are that grid chamber, the longitudinal section of overflow plate are right-angled trapezium shape in length and breadth.When aerated flow enters gas-liquid
Separator box 3 makes gas overflowing in water body by the abundant energy dissipating of the overflow plate of energy dissipating grid 4 and overflow baffle 5, and gas-liquid is divided completely
Enter gas system of surveying from, the upper space region that gas concentrates at gas-liquid separating box 3, liquid is from the transverse slat top in overflow baffle 5
Portion's overflow into survey water system.
Flow measuring system includes sequentially connected vertical shaft import 6, vertical shaft 7, watch window 8, horizontal pipe 9, and vertical shaft import 6 is
Funnel-form, watch window 8 are transparent material.Horizontal in vertical shaft, interval setting water vapour sorting grid lattice 10, under horizontal pipe
Flowmeter 11 is arranged in trip portion, and the length of horizontal pipe is greater than 10 times of calibers before flowmeter, and water valve is arranged in the end of horizontal pipe
12。
Surveying gas system includes downtake pipe 13, Active Interface 14, closed air bag 15 and air valve 16, and closed air bag 15 passes through
Active Interface 14 is connect with the nozzle of downtake pipe 13, and the nozzle and Active Interface 14 of downtake pipe 13 is arranged in air valve 16
Between.
It in order to improve measurement precision, needs to carry out current stabilization operation before measuring, therefore, in the top of gas-liquid separating box 3
Second exhaust pipe 17 is also set up, the end of second exhaust pipe 17 is provided with regulating valve 18.
The relative dimensions and material of aeration concentrater measuring device provided in this embodiment: sluicing chute 1 is 0.4m*0.3m*
0.4m, bottom board slope are 60 ° (in general, bottom board slope is greater than 30 °), and side wall is that water surface fluidised form can be observed in transparent material.Gas
Liquid separator box 3 is made of organic glass, having a size of 5m*1m*1m.It the caliber 0.3m of vertical shaft 7, is highly 2m.Horizontal pipe 9
Diameter is 0.3m, length 4m.The caliber of downtake pipe 13 and second exhaust pipe 17 is 0.1m, is highly 1m.Closed air bag
15 are made of lightweight flexible plastic film, are a kind of inductility cylindrical body mantles, and diameter maximum value is 0.5m, and length maximum value is
3m；Closed air bag 15 is suitable for gas volume free extension, original state be compressive state, expanded after inflation, outside it
Side wall indicates scale from bottom, convenient for reading the physical length of closed air bag 15 after inflation.About aeration concentrater measuring device
Specific size and material, can select according to actual needs when in use, dimensions above and material are not formed the utility model
It limits.
As shown in Figure 3, Figure 4, the aeration concentrater measurement method of aeration concentrater measuring device provided in this embodiment are as follows: to letting out
Water chute 1 introduces water flow, adjusts the height of sponge baffle 2, contacts its bottom surface with the water surface；Water flow flows into gas-liquid separating box 3, leads to
4 energy dissipating of energy dissipating grid is crossed, is overflowed from 5 top of overflow baffle, realizes gas-liquid separation；After waterflow stabilization, surveyed by flow measuring system
The liquid volume in the unit time is obtained, meanwhile, gas volume is measured by surveying gas system, the definition according to aeration concentrater calculates
Be averaged aeration concentrater out.
It is specifically divided into following steps:
Step S1 introduces water flow to sluicing chute 1, adjusts the height of sponge baffle 2, contact its bottom surface with the water surface.Mesh
Be to form fluid-tight, isolation outside air and separator box gas.
Step S2 opens regulating valve 18 and water valve 12, closes air valve 16, flow-shape is observed by watch window 8, until water
Stream is stablized.Waterflow stabilization refers to: water flow bubble-free and flow is in respect of constant registration.
Step S3 drains the gas of closed air bag 15, and closed air bag 15 is connected to 16 end of air valve by Active Interface 14
End.
Step S4 opens air valve 16, closes regulating valve 18, records time t at this time1Recording flowmeter reads Q simultaneouslyw(repeatedly
It is averaged).
Step S5, after closed air bag 15 is collected into gas, the radius of closed air bag 15 is r, extracts Active Interface 14, note
Record time t at this time2, read the effective height h of closed 15 bulging of air bag.
Step S6, data processing.
Step S6 points are:
Step S61 calculates gas (gas phase) volume Va=π r2*h。
Step S62 calculates liquid (liquid phase) volume Vw=Qw*(t2-t1)。
Step S63 calculates the average aeration concentrater of aerated flow: C=Va/(Va+Vw)。
Aeration concentrater measuring device and method provided in this embodiment measure aerated flow from the definition of aeration concentrater
Average aeration concentrater or air entrainment, principle be simple and convenient to operate, measurement method is direct, and disturbing factor is few.Aeration concentrater measurement
Device energy dissipating is abundant, and air-liquid separation process is steady, guarantees gas by different valve regulateds to the adaptable of inlet flow conditions
Liquid is kept completely separate and then accurate measurement gas phase, liquid phase volume, measurement accuracy are high respectively.
Embodiment 2
Aeration concentrater measuring device and embodiment provided in this embodiment are essentially identical, and difference is only are as follows: the present embodiment
Anemobiagraph is selected to replace closed air bag, as the measurement method for surveying gas system, for measuring the gas phase flow rate in aerated flow.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (5)
1. a kind of aeration concentrater measuring device, which is characterized in that the aeration concentrater measuring device includes influent stream system, gas-liquid point
From system, flow measuring system and survey gas system；The influent stream system includes sluicing chute and sponge baffle, the sponge baffle plate setting
In the top of the sluicing chute；The Separate System of Water-jet includes gas-liquid separating box, energy dissipating grid, overflow baffle, described to disappear
Energy grid and overflow baffle are each attached to the gas-liquid separating box lower inside, and the overflow baffle is located under the energy dissipating grid
Trip；Entrance, gas outlet and water outlet are provided in the gas-liquid separating box, the sluicing chute is connected to the entrance, described
Flow measuring system is connected to the water outlet, and the survey gas system is connected to the gas outlet.
2. aeration concentrater measuring device according to claim 1, which is characterized in that the energy dissipating grid be provided with it is multiple,
The surface of the energy dissipating grid is evenly distributed with several through-holes, and the energy dissipating grid is vertical, interval is arranged.
3. aeration concentrater measuring device according to claim 1, which is characterized in that the overflow baffle includes transverse slat and overflows
Flowing plate, the transverse slat are horizontally fixed on the top of the overflow plate upstream face, and the overflow plate is fixed on the gas-liquid separating box
Bottom surface, the upstream face of the overflow plate is grid chamber in length and breadth.
4. aeration concentrater measuring device according to claim 1, which is characterized in that the flow measuring system includes being sequentially connected
Vertical shaft import, vertical shaft, watch window, horizontal pipe, the vertical shaft import be funnel-form, the watch window be transparent material
Matter；The flow measuring system further includes water vapour sorting grid lattice, flowmeter and water valve, and the water vapour sorting grid lattice are perpendicular to vertical shaft axis
Line is arranged at intervals in the vertical shaft, and the downstream portion of the horizontal pipe is arranged in the flowmeter, and the water valve setting exists
The end of the horizontal pipe is located at the flowmeter downstream.
5. aeration concentrater measuring device according to claim 1, which is characterized in that the survey gas system includes and the gas
The downtake pipe and second exhaust pipe of liquid separation system connection, Active Interface, closed air bag, air valve, regulating valve are described closed
Air bag is connect by the Active Interface with the nozzle of the downtake pipe, and the closed air bag adapts to gas volume and freely stretches
Contracting；The air valve is arranged between the nozzle of the downtake pipe and the Active Interface, and the regulating valve is arranged described
Second exhaust tube end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821272272.7U CN208399303U (en) | 2018-08-08 | 2018-08-08 | A kind of aeration concentrater measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821272272.7U CN208399303U (en) | 2018-08-08 | 2018-08-08 | A kind of aeration concentrater measuring device |
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| CN208399303U true CN208399303U (en) | 2019-01-18 |
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ID=65129452
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| CN201821272272.7U Expired - Fee Related CN208399303U (en) | 2018-08-08 | 2018-08-08 | A kind of aeration concentrater measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801844A (en) * | 2018-08-08 | 2018-11-13 | 江苏省水利科学研究院 | A kind of aeration concentrater measuring device and method |
| CN109991245A (en) * | 2019-04-09 | 2019-07-09 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of radial type entrained air concentration meter method of calibration |
| CN111272203A (en) * | 2020-01-20 | 2020-06-12 | 王芳 | Industrial control equipment test system |
-
2018
- 2018-08-08 CN CN201821272272.7U patent/CN208399303U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801844A (en) * | 2018-08-08 | 2018-11-13 | 江苏省水利科学研究院 | A kind of aeration concentrater measuring device and method |
| CN108801844B (en) * | 2018-08-08 | 2024-04-02 | 江苏省水利科学研究院 | Device and method for measuring aeration concentration |
| CN109991245A (en) * | 2019-04-09 | 2019-07-09 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of radial type entrained air concentration meter method of calibration |
| CN111272203A (en) * | 2020-01-20 | 2020-06-12 | 王芳 | Industrial control equipment test system |
| CN111272203B (en) * | 2020-01-20 | 2021-11-09 | 东营威联化学有限公司 | Industrial control equipment test system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190118 Termination date: 20190808 |