CN110017874A - Runoff measuring device and diameter flow measuring method - Google Patents
Runoff measuring device and diameter flow measuring method Download PDFInfo
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- CN110017874A CN110017874A CN201910335102.1A CN201910335102A CN110017874A CN 110017874 A CN110017874 A CN 110017874A CN 201910335102 A CN201910335102 A CN 201910335102A CN 110017874 A CN110017874 A CN 110017874A
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- crest
- flow
- catch box
- weir
- sea level
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/28—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with stationary measuring chambers having constant volume during measurement
Abstract
A kind of runoff measuring device, comprising: crest of weir case offers flow measurement crest of weir；First liquid level sensor is set in crest of weir case, to detect the SEA LEVEL VARIATION in crest of weir case, obtains the first SEA LEVEL VARIATION signal；Catch box is connect with crest of weir case, and plane is higher than the upper opening of catch box on the bottom plate of crest of weir case, can flow into catch box along flow measurement crest of weir to flow into the liquid of crest of weir case；Second liquid level sensor, is set in catch box, to detect the SEA LEVEL VARIATION in catch box, obtains the second SEA LEVEL VARIATION signal；Processing unit is received, is suitable for receiving the first SEA LEVEL VARIATION signal and the second SEA LEVEL VARIATION signal, and according to the first SEA LEVEL VARIATION signal identification first flow, according to the second SEA LEVEL VARIATION signal identification second flow.The present invention using crest of weir case and catch box combination flow measurement by the way of, one section of water flow process is subjected to segment processing, no matter the precise measurement to water flow can be reached in the case of realizing regime flow or unstable flow.
Description
Technical field
The present embodiments relate to runoff field of measuring technique more particularly to a kind of runoff measuring device and diameter flow measurement sides
Method.
Background technique
In recent years as Development of Urbanization process is accelerated, urban inner flood happens occasionally, about Urban Hydrologic
Research becomes research hotspot.Flow is the important interior of Urban Hydrologic quantitative study urban inner run-off in precise measurement city
Hold, all there is practical significance in the scientific researches such as Urban Storm Flood simulation, sponge city and production practices.
However, accurate prison of the picture to the flows such as flow mode, resident living sewage in cell in the acquisition of usually data
Survey it is but very difficult, it is very unstable that this is mainly due to water flows, traditional flowmeter cannot very accurate measuring flow, be easy
Generate error.
Therefore how quickly, the technical issues of easily and accurately measuring flow just becomes urgent need to resolve.
Summary of the invention
The technical issues of embodiment of the present invention solves is to provide a kind of runoff measuring device, quickly, easily and accurately to survey
Measure flow.
To solve the above problems, the embodiment of the present invention provides a kind of runoff measuring device, comprising:
Crest of weir case, including flow measurement crest of weir；
First liquid level sensor is set in the crest of weir case, to detect the SEA LEVEL VARIATION in the crest of weir case, obtains the
One SEA LEVEL VARIATION signal；
Catch box is connect with the crest of weir case, and plane is higher than the upper opening of the catch box on the bottom plate of the crest of weir case,
To flow into the liquid of the crest of weir case catch box can be flowed into along the flow measurement crest of weir；
Second liquid level sensor is set in the catch box, to detect the SEA LEVEL VARIATION in the catch box, obtains the
Two SEA LEVEL VARIATION signals；
Processing unit is received, is suitable for receiving the first SEA LEVEL VARIATION signal and the second SEA LEVEL VARIATION signal, and root
According to the first SEA LEVEL VARIATION signal identification first flow, according to the second SEA LEVEL VARIATION signal identification second flow.
Optionally, the catch box offers relief port, the runoff measuring device further include:
Automatic valve is located in the catch box, and is located at the relief port, to be opened and closed the relief port.
Optionally, the automatic valve includes:
Magnetic patch is fixed on the bottom plate of catch box；
Magnetic valve is located in the catch box；
Block is fixed on the inner wall of the catch box, positioned at the top of the magnetic valve, and is offered described in connection
The through-hole of the upper and lower surfaces of block；
Buoyancy piece, positioned at the top of the block；
Connector passes through the through-hole and connects the magnetic valve and the buoyancy piece.
Optionally, the inner wall of the catch box includes that the first block fixed part of the fixed block and the second block are fixed
Portion, the first block fixed position is in the top of the second block fixed part.
Optionally, the inner wall of the catch box is provided with slideway, and the slideway is bottom-up along the inner wall of the catch box
Extend, the block is fixed on the inner wall of the catch box by slideway.
Optionally, the automatic valve further include:
Energy-stored spring, the first end of the energy-stored spring connect the buoyancy piece, the second end connection of the energy-stored spring
The magnetic valve.
Optionally, the energy-stored spring is stainless steel energy-stored spring.
Optionally, the runoff measuring device further include:
Energy dissipating column is fixed in the catch box, and the energy dissipating column offers hollow cavity, and the automatic valve is set to described
In hollow cavity.
Optionally, the runoff measuring device further include:
Strainer grid is set to the water inlet of the crest of weir case.
Optionally, crest of weir case upper surface is covered with the first weather shield, and the catch box upper surface is covered with second gear
Rain plate.
Optionally, the material of the crest of weir case and the catch box is stainless steel.
Optionally, the flow measurement crest of weir is triangle crest of weir.
Optionally, the length of the crest of weir case is at least 5 times of the flow measurement crest of weir height.
To solve the above problems, the embodiment of the present invention provides a kind of diameter flow measuring method, filled using above-mentioned diameter flow measurement
It sets, comprising:
The SEA LEVEL VARIATION in the crest of weir case is detected, the first SEA LEVEL VARIATION signal is obtained, detects the water in the catch box
Position variation, obtains the second SEA LEVEL VARIATION signal；
According to first flow described in the first SEA LEVEL VARIATION signal identification, and according to the second SEA LEVEL VARIATION signal post
Know the second flow.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantage that
Runoff measuring device provided by the embodiment of the present invention, comprising: crest of weir case offers flow measurement crest of weir；First
Liquid level sensor is set in the crest of weir case, to detect the SEA LEVEL VARIATION in the crest of weir case, obtains the first SEA LEVEL VARIATION letter
Number；Catch box is connect with the crest of weir case, and plane is higher than the upper opening of the catch box on the bottom plate of the crest of weir case, so as to
The liquid for flowing into the crest of weir case can flow into the catch box along the flow measurement crest of weir；Second liquid level sensor, is set to
In the catch box, to detect the SEA LEVEL VARIATION in the catch box, the second SEA LEVEL VARIATION signal is obtained；Processing unit is received,
Suitable for receiving the first SEA LEVEL VARIATION signal and the second SEA LEVEL VARIATION signal, and according to the first SEA LEVEL VARIATION signal
First flow is identified, according to the second SEA LEVEL VARIATION signal identification second flow.Runoff provided by the embodiment of the present invention is surveyed
Device is measured, when carrying out diameter flow measurement, water flow to be measured is introduced in crest of weir case, the first liquid level sensor being set in crest of weir case
The height of water level in crest of weir case is measured, obtains the first SEA LEVEL VARIATION signal, and the first SEA LEVEL VARIATION signal is sent to receiving area
Unit is managed, to calculate the first flow of crest of weir case；Water flows through flow measurement crest of weir and flows into catch box, is set in the catch box
The second liquid level sensor the water level in catch box is detected, obtain the second SEA LEVEL VARIATION signal, and by the second water level become
Change signal and be sent to reception processing unit, to calculate the second flow in catch box, while receiving processing unit can be to first-class
Amount and second flow be identified processing, so as to detection initial stage, when receive handle unit marks first flow and second
When changing greatly of amount, the second flow that catch box of being subject to measures；Over time, when reception processing unit marks
After first flow is identical as second flow, and the variation of the two is small, the data that catch box of being subject to measures, the present invention is adopted
The mode of crest of weir case and catch box combination flow measurement, carries out segment processing for one section of water flow process, no matter realizing regime flow
Or in the case of unstable flow, the precise measurement to water flow can be reached.Further, the embodiment of the present invention is mentioned
The runoff measuring device of confession, structure are simple, it is not easy to break down, and liquid level sensor can also be in the case where lower cost
Improve detection accuracy.
In optinal plan, runoff measuring device provided by the embodiment of the present invention, the automatic valve further include: energy storage bullet
Spring, the first end of the energy-stored spring connect the buoyancy piece, and the second end of the energy-stored spring connects the magnetic valve.?
When being detected, buoyancy piece increases, coupled connecting part stretching energy-stored spring, energy storage bullet as liquid collecting pool water level rises
Spring tension increases, and when water level rises to preset height, energy-stored spring tension is greater than the suction between magnetic valve and magnetic patch, magnetic
Property valve rapidly upward, relief port open, start to drain；Water level is begun to decline in collecting tank, when water level is reduced to preset water level
When, energy-stored spring tension is less than the suction between magnet, and magnetic valve is closed.It is controlled according to the variation of water level in collecting tank magnetic
The switch of valve can prevent collecting tank during flow measurement from the phenomenon that overflow occur.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of application for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of runoff measuring device main view provided by the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the top view of Fig. 1；
Fig. 3 is the structural schematic diagram of the left view of Fig. 1；
Fig. 4 is a kind of partial schematic diagram of runoff measuring device provided by the embodiment of the present invention.
Wherein: 10- crest of weir case；100- flow measurement crest of weir；20- catch box；200- relief port；The first level sensing of 11-
Device；The second liquid level sensor of 22-；30- energy dissipating column；40- strainer grid；50- water inlet；60- automatic valve；61- magnetic patch；62- magnetic
Property valve；63- block；64- buoyancy piece；65- connector；66- energy-stored spring.
Specific embodiment
It can be seen from background technology that traditional flowmeter cannot very accurate measuring flow.
It is influenced by field complex environment, most flow measurement method is mostly collecting-tank to be arranged in water outlet, but collecting-tank then can only
The measurement for realizing flow total amount, cannot form discharge process；Triangular-notch weir is at this stage in weir flow flow measurement using more universal one kind,
Have features designed to the features such as low, easy to use.Traditional triangular-notch weir is commonly used in the measurement of stationary flow, however for unstable
It is then poor to flow precision.Simultaneously as triangular-notch weir largely needs manual measurement and calculating, so hardly resulting in the stream of approximate continuous
Amount process.
In order to quickly, easily and accurately measuring flow, the embodiment of the invention provides a kind of runoff measuring devices, comprising:
Crest of weir case offers flow measurement crest of weir；First liquid level sensor is set in the crest of weir case, to detect the crest of weir case
Interior SEA LEVEL VARIATION obtains the first SEA LEVEL VARIATION signal；Catch box is connect with the crest of weir case, on the bottom plate of the crest of weir case
Plane is higher than the upper opening of the catch box, can flow into institute along the flow measurement crest of weir to flow into the liquid of the crest of weir case
State catch box；Second liquid level sensor is set in the catch box, to detect the SEA LEVEL VARIATION in the catch box, is obtained
Second SEA LEVEL VARIATION signal；Processing unit is received, is suitable for receiving the first SEA LEVEL VARIATION signal and second SEA LEVEL VARIATION
Signal, and according to the first SEA LEVEL VARIATION signal identification first flow, according to the second SEA LEVEL VARIATION signal identification second
Flow.Water flow to be measured is introduced crest of weir case when carrying out diameter flow measurement by runoff measuring device provided by the embodiment of the present invention
Height of water level that is interior, being set in the first liquid level sensor measurement crest of weir case in crest of weir case, obtains the first SEA LEVEL VARIATION signal,
And the first SEA LEVEL VARIATION signal is sent to reception processing unit, to calculate the first flow of crest of weir case；Water flows through flow measurement
Crest of weir flows into catch box, and the second liquid level sensor being set in the catch box detects the water level in catch box, obtains
The second SEA LEVEL VARIATION signal, and the second SEA LEVEL VARIATION signal is sent to reception processing unit, to calculate the in catch box
Two flows, while receiving processing unit and can be identified processing to first flow and second flow, so as at detection initial stage, when connecing
Receive first flow and when the changing greatly of second flow of processing unit mark, the second flow that catch box of being subject to measures；With
The passage of time, after the first flow for receiving processing unit marks is identical as second flow, and the variation of the two is small,
The data that crest of weir case of being subject to measures.The present invention using crest of weir case and catch box combination flow measurement by the way of, by a Duan Shuiliu
Process carries out segment processing, no matter can reach in the case of realizing regime flow or unstable flow to water flow
Precise measurement.Further, runoff measuring device provided by the embodiment of the present invention, structure are simple, it is not easy to it breaks down, and
Liquid level sensor can also improve detection accuracy in the case where lower cost.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It should be noted that the orientation or positional relationship of instruction involved by this specification is side based on the figure
Position or positional relationship are merely for convenience of description and simplification description, rather than the device of indication or suggestion meaning must have spy
Fixed orientation with specific orientation construction, therefore is not considered as limiting the invention.
Please refer to Fig. 1-Fig. 4, Fig. 1 is that a kind of structure of runoff measuring device main view provided by the embodiment of the present invention is shown
It is intended to；Fig. 2 is the structural schematic diagram of the top view of Fig. 1；Fig. 3 is the structural schematic diagram of the left view of Fig. 1；Fig. 4 is of the invention real
Apply a kind of partial schematic diagram of runoff measuring device provided by example.
As shown in the figure, runoff measuring device provided by the embodiment of the present invention, comprising:
Crest of weir case 10, including flow measurement crest of weir 100；
First liquid level sensor 11 is set in the crest of weir case 10, to detect the SEA LEVEL VARIATION in the crest of weir case 10,
Obtain the first SEA LEVEL VARIATION signal；
Catch box 20 is connect with the crest of weir case 10, and plane is higher than the catch box 20 on the bottom plate of the crest of weir case 10
Upper opening, the catch box 20 can be flowed into along the flow measurement crest of weir 100 to flow into the liquid of the crest of weir case 10；
Second liquid level sensor 22 is set in the catch box 20, to detect the SEA LEVEL VARIATION in the catch box 20,
Obtain the second SEA LEVEL VARIATION signal；
Processing unit is received, is suitable for receiving the first SEA LEVEL VARIATION signal and the second SEA LEVEL VARIATION signal, and root
According to the first SEA LEVEL VARIATION signal identification first flow, according to the second SEA LEVEL VARIATION signal identification second flow.
In the present embodiment, to be illustrated for triangle crest of weir, triangular-notch weir has features designed to the flow measurement crest of weir 100
The features such as this is low, easy to use is to use a kind of more universal current surveying device in weir flow flow measurement at this stage.In other embodiments
In, the flow measurement crest of weir 100 can also be the measurement crest of weir of the other forms such as rectangular weir.
In a specific embodiment, the water inlet 50 of crest of weir case 10 is connected with water pipe, and crest of weir case 10 can be as far as possible
It is long and smooth, it is therefore an objective to make that the water flows gently, improve measurement accuracy.The specific size of crest of weir case 10 can be depending on operating condition.
In a specific embodiment, the length of the crest of weir case 10 is at least the 5 of 100 height of flow measurement crest of weir
Times, to further increase the accuracy of measurement.
Using arrow direction in Fig. 1 as flow direction, water flow to be measured is introduced into crest of weir case 10 fluid to be measured by user, measurement
In the process, the first liquid level sensor 11 measures the SEA LEVEL VARIATION in crest of weir case 10 and the data being collected into is transferred to reception processing
Unit, the second liquid level sensor 22 measure the water level in catch box 20 and the data being collected into are transferred to reception processing unit,
Processing unit is received according to the first SEA LEVEL VARIATION signal identification first flow, according to the second SEA LEVEL VARIATION signal identification
Second flow.
In a specific embodiment, the mode for receiving processing unit marks first flow and second flow is that display is current
Flow and discharge process curve, user can judge whether water flow is stable according to flow curve.Certainly, in other embodiments
In, first flow and second flow can also be identified by other forms such as table or histograms by receiving processing unit.
Recommended according to " weir notch flow measurement specification ", when weir plate apex angle is between (30 ° -120 °), by the water of standard triangular-notch weir
Position calculated weir flow formula are as follows:
Wherein: Q1The flow of fluid, unit m are measured for triangular-notch weir3/s；μ is discharge coefficient, about 0.6；θ is weir plate top
Angle, unit are °；G is acceleration of gravity, takes 9.8m/s2；h1For the geometry head of triangular-notch weir, unit m.
Downward, and apex angle magnitude range is between 30 ° -120 ° for the triangle apex angle of thin-walled triangular-notch weir, calculating side at 90 °
Just.
Calculate fluid flow formula in catch box 20 are as follows:
Wherein: Q2The flow of fluid, unit m are measured for catch box 203/s；h2Liquid collecting is flowed into for the fluid of crest of weir case 10
The water level of case 20, unit m；h0For liquid height of water level in initial catch box 20, unit m；A is the length at 20 bottom of catch box,
Unit is m；B is 20 bottom width of catch box, unit m；Δ t is time used in 20 flow measurement of catch box, unit s.
When drawing final flow rate Q curve, initial Q is unstable and discontinuous, then Q=Q2；Work as Q1=Q2When and Q1、Q2Later
When even continuous-stable variation a period of time, then Q=Q1。
The present invention using crest of weir case and catch box combination flow measurement by the way of, one section of water flow process is subjected to segment processing,
No matter the precise measurement to water flow can be reached in the case of realizing regime flow or unstable flow.Further,
Runoff measuring device provided by the embodiment of the present invention, structure are simple, it is not easy to break down, and liquid level sensor can also be
Detection accuracy is improved in the case where lower cost.
In conjunction with Fig. 1 and Fig. 4, to prevent the liquid spill-over in catch box 20, in a specific embodiment, the catch box
20 offer relief port 200, the runoff measuring device further include:
Automatic valve 60 is located in the catch box 20, and is located at the relief port 200, to be opened and closed the relief port
200。
Specifically, the automatic valve 60 may include:
Magnetic patch 61 is fixed on the bottom plate of catch box 20；
Magnetic valve 62 is located in the catch box 20；
Block 63 is fixed on the inner wall of the catch box 20, positioned at the top of the magnetic valve, and offers connection
The through-hole of the upper and lower surfaces of the block 63；
Buoyancy piece 64, positioned at the top of the block 63；
Connector 65 passes through the through-hole and connects the magnetic valve and the buoyancy piece 64.
Buoyancy piece 64 is increased as 20 water level of catch box rises, and coupled connector 65 stretches magnetic valve 62,
When the buoyancy of buoyancy piece 64 is greater than suction between magnetic valve 62 and magnetic patch 61, magnetic valve 62 rapidly upward, relief port 200
It opens, starts to drain；Water level is begun to decline in catch box 20, when the buoyancy of buoyancy piece 64 is less than the suction between magnet, magnetism
Valve 62 is closed.
Runoff measuring device provided by the embodiment of the present invention controls magnetic valve according to the variation of water level in catch box 20
Switch, can prevent catch box 20 during flow measurement from the phenomenon that overflow occur.
As shown in figure 4, in one embodiment, be it is easy to process, buoyancy piece 64 is spherical shape, in other embodiments, is floated
Power part 64 can also be processed into other shapes.
Connector 65, which can be bracing wire or other, any can play the role of connecting buoyancy piece 64 and magnetic valve 62
Object.
Block 63 is used to limit the position of magnetic valve 62, to prevent magnetic valve 62 under the drive of buoyancy piece 64 with magnetic patch
Hypertelorism between 61 and can not again with magnetic patch 61 attract together.In order to can adjust the size of water valve unlatching, in a kind of tool
In body embodiment, the inner wall of the catch box 20 includes that the first block fixed part of the fixed block 63 and the second block are fixed
Portion, the first block fixed position is in the top of the second block fixed part.
In another embodiment, the inner wall of the catch box 20 is provided with slideway, and the slideway is along the catch box 20
The bottom-up extending direction of inner wall, the block 63 are fixed on the inner wall of the catch box 20 by slideway.So, it can be achieved that
Block 63 is continuously fixed on the inner wall of the catch box 20.
With continued reference to Fig. 4, in a specific embodiment, the automatic valve 60 can also include:
Energy-stored spring 66, the first end of the energy-stored spring 66 connect the buoyancy piece 64, and the of the energy-stored spring 66
Two ends connect the magnetic valve 62.Buoyancy piece 64 increases, coupled connector 65 as 20 water level of catch box rises
Energy-stored spring 66 is stretched, 66 tension of energy-stored spring increases, and when water level rises to preset height, 66 tension of energy-stored spring is greater than magnetic
Property valve 62 and magnetic patch 61 between suction, magnetic valve 62 rapidly upward, relief port 200 open, start to drain；Catch box 20
Middle water level is begun to decline, and when water level is reduced to preset water level, 66 tension of energy-stored spring is less than the suction between magnet, magnet valves
Door 62 is closed.
The original that energy converts between the attraction three of the buoyancy of water, the elastic force of spring and magnet is utilized in automatic valve 60
Reason, structure is simple, and cost is relatively low, energy conservation and environmental protection.
In a specific embodiment, the energy-stored spring 66 is stainless steel energy-stored spring 66, to prevent for a long time in water
Immersion corrosion.
Combined with Figure 1 and Figure 2, in a specific embodiment, the runoff measuring device, further includes:
Energy dissipating column 30 is fixed in the catch box 20, and the energy dissipating column 30 offers hollow cavity, the automatic valve setting
In in the hollow cavity.The energy dissipating column 30 is upper end opening and hollow structure, and 30 outer wall of energy dissipating column has equally distributed energy dissipating
Hole, the impact for reducing liquid to inner wall of container, makes liquid level in case gently improve measurement accuracy.
As shown in Fig. 2, in the present embodiment, energy dissipating column 30 is set to the corner of the catch box, the inner wall of catch box and
Energy dissipating column surrounds hollow cavity jointly, by the way that automatic valve to be set in the hollow cavity of energy dissipating column 30, saves space.
As shown in figure 3, in a specific embodiment, the runoff measuring device can also include:
Strainer grid 40 is set to the water inlet of the crest of weir case 10.The strainer grid 40 was used for the tree in drainage
The impurity such as leaf, house refuse avoid blocking device, improve device measuring precision.In measurement, prevent strainer grid 40 by leaf
Equal impurity blocking, should be timed cleaning.
In a specific embodiment, anti-in measurement since crest of weir case 10 and catch box 20 are upper opening design
Only foreign matter or rainwater enter, and 10 upper surface of crest of weir case is covered with the first weather shield, and 20 upper surface of catch box is covered with
Second weather shield, for example, the measures such as covering paulin.It certainly, in other embodiments, can also be by crest of weir case 10 and liquid collecting
Case 20 is designed as upper seal structure.
In a specific embodiment, for save the cost, the material of the crest of weir case 10 and the catch box 20 is
Stainless steel.Crest of weir case 10 cuts welding production by stainless steel plate 304 and forms.Certainly, in other embodiments, 10 He of crest of weir case
The catch box 20 can also change other materials, such as glass etc. into.
To solve the above problems, the embodiment of the present invention provides a kind of diameter flow measuring method, filled using above-mentioned diameter flow measurement
It sets, comprising:
The SEA LEVEL VARIATION in the crest of weir case is detected, the first SEA LEVEL VARIATION signal is obtained, detects the water in the catch box
Position variation, obtains the second SEA LEVEL VARIATION signal；
The SEA LEVEL VARIATION in the crest of weir case is detected, the first liquid level sensor can be passed through by obtaining the first SEA LEVEL VARIATION signal
It completes.The SEA LEVEL VARIATION in the catch box is detected, obtaining the second SEA LEVEL VARIATION signal can be complete by the second liquid level sensor
At.
According to first flow described in the first SEA LEVEL VARIATION signal identification, and according to the second SEA LEVEL VARIATION signal post
Know the second flow.
According to first flow Q described in the first SEA LEVEL VARIATION signal identification1, and according to the second SEA LEVEL VARIATION signal
Identify the second flow Q2It can be completed by receiving processing unit.
Specifically, processing unit marks first flow Q is received1With second flow Q2Mode can for display present flow rate
With discharge process curve, user can judge whether water flow is stable according to flow curve.
Certainly, in other embodiments, the other forms mark such as table or histogram can also be passed through by receiving processing unit
Know first flow Q1With second flow Q2。
When carrying out diameter flow measurement, water flow to be measured is introduced in crest of weir case, the first level sensing being set in crest of weir case
Device measures the height of water level in crest of weir case, obtains the first SEA LEVEL VARIATION signal, and the first SEA LEVEL VARIATION signal is sent to reception
Processing unit, to calculate the first flow Q of crest of weir case1；Water flows through flow measurement crest of weir and flows into catch box, is set to the liquid collecting
The second liquid level sensor in case detects the water level in catch box, obtains the second SEA LEVEL VARIATION signal, and by the second water
Position variable signal is sent to reception processing unit, to calculate the second flow Q in catch box2, while receiving processing unit can be right
First flow Q1With second flow Q2Be identified processing, so as to detection initial stage, when receive processing unit marks first flow
Q1With second flow Q2When changing greatly, the second flow Q that is measured with catch box2Subject to；Over time, work as reception
The first flow Q of processing unit mark1With second flow Q2It is identical, and after the variation of the two is small, measured with crest of weir case
Subject to data.
It is easily understood that receiving the first flow Q of processing unit marks at detection initial stage1With second flow Q2Variation
It is larger, refer to initial flow instability and discontinuous.Over time, when the first flow for receiving processing unit marks
Q1With second flow Q2It is identical, and the variation of the two is smaller, refers to working as Q1=Q2When and Q1、Q2Uniformly continuous, which is stablized, later becomes
Change a period of time.
The embodiment of the present invention provides a kind of diameter flow measuring method, using crest of weir case and catch box combination flow measurement by the way of,
One section of water flow process is subjected to segment processing, no matter in the case of realizing regime flow or unstable flow, can reach pair
The precise measurement of water flow.Further, runoff measuring device provided by the embodiment of the present invention, structure are simple, it is not easy to
It breaks down, and liquid level sensor can also improve detection accuracy in the case where lower cost.
Although the embodiment of the present invention discloses as above, present invention is not limited to this.Anyone skilled in the art, not
It is detached from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should be with right
It is required that subject to limited range.
Claims (13)
1. a kind of runoff measuring device characterized by comprising
Crest of weir case offers flow measurement crest of weir；
First liquid level sensor is set in the crest of weir case, to detect the SEA LEVEL VARIATION in the crest of weir case, obtains the first water
Position variable signal；
Catch box is connect with the crest of weir case, and plane is higher than the upper opening of the catch box on the bottom plate of the crest of weir case, so as to
The liquid for flowing into the crest of weir case can flow into the catch box along the flow measurement crest of weir；
Second liquid level sensor is set in the catch box, to detect the SEA LEVEL VARIATION in the catch box, obtains the second water
Position variable signal；
Processing unit is received, is suitable for receiving the first SEA LEVEL VARIATION signal and the second SEA LEVEL VARIATION signal, and according to institute
The first SEA LEVEL VARIATION signal identification first flow is stated, according to the second SEA LEVEL VARIATION signal identification second flow.
2. runoff measuring device as described in claim 1, which is characterized in that the catch box offers relief port, the diameter
Flow measuring apparatus further include:
Automatic valve is located in the catch box, and is located at the relief port, to be opened and closed the relief port.
3. runoff measuring device as claimed in claim 2, which is characterized in that the automatic valve includes:
Magnetic patch is fixed on the bottom plate of catch box；
Magnetic valve is located in the catch box；
Block is fixed on the inner wall of the catch box, positioned at the top of the magnetic valve, and offers the connection block
Upper and lower surfaces through-hole；
Buoyancy piece, positioned at the top of the block；
Connector passes through the through-hole and connects the magnetic valve and the buoyancy piece.
4. runoff measuring device as claimed in claim 3, which is characterized in that the inner wall of the catch box includes the fixed gear
The the first block fixed part and the second block fixed part of block, the first block fixed position is in the top of the second block fixed part.
5. runoff measuring device as claimed in claim 4, which is characterized in that the inner wall of the catch box is provided with slideway, institute
Inner wall bottom-up extension of the slideway along the catch box is stated, the block is fixed on the inner wall of the catch box by slideway
On.
6. such as the described in any item runoff measuring devices of claim 3-5, which is characterized in that the automatic valve further include:
Energy-stored spring, the first end of the energy-stored spring connect the buoyancy piece, described in the second end connection of the energy-stored spring
Magnetic valve.
7. runoff measuring device as claimed in claim 6, which is characterized in that the energy-stored spring is stainless steel energy-stored spring.
8. such as the described in any item runoff measuring devices of claim 3-5, which is characterized in that further include:
Energy dissipating column is fixed in the catch box, and the energy dissipating column offers hollow cavity, and the automatic valve is set to described hollow
It is intracavitary.
9. runoff measuring device as described in any one in claim 1-5, which is characterized in that further include:
Strainer grid is set to the water inlet of the crest of weir case.
10. runoff measuring device as described in any one in claim 1-5, which is characterized in that the crest of weir case and the liquid collecting
The material of case is stainless steel.
11. runoff measuring device as described in any one in claim 1-5, which is characterized in that the flow measurement crest of weir is three
Angle crest of weir.
12. runoff measuring device as described in any one in claim 1-5, which is characterized in that the length of the crest of weir case is institute
At least 5 times for stating flow measurement crest of weir height.
13. a kind of diameter flow measuring method, which is characterized in that using such as the described in any item diameter flow measurement dresses of claim 1-12
It sets, comprising:
The SEA LEVEL VARIATION in the crest of weir case is detected, the first SEA LEVEL VARIATION signal is obtained, the water level detected in the catch box becomes
Change, obtains the second SEA LEVEL VARIATION signal；
According to first flow described in the first SEA LEVEL VARIATION signal identification, and according to the second SEA LEVEL VARIATION signal identification institute
State second flow.
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| CN201910335102.1A CN110017874B (en) | 2019-04-24 | 2019-04-24 | Runoff measuring device and runoff measuring method |
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