CN110017874B - Runoff measuring device and runoff measuring method - Google Patents
Runoff measuring device and runoff measuring method Download PDFInfo
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- CN110017874B CN110017874B CN201910335102.1A CN201910335102A CN110017874B CN 110017874 B CN110017874 B CN 110017874B CN 201910335102 A CN201910335102 A CN 201910335102A CN 110017874 B CN110017874 B CN 110017874B
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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 runoff measuring apparatus comprising: the weir crest box is provided with a flow measurement weir crest; the first liquid level sensor is arranged in the weir crest tank to detect the water level change in the weir crest tank to obtain a first water level change signal; the upper plane of the bottom plate of the weir crest box is higher than the upper opening of the weir crest box, so that the liquid flowing into the weir crest box can flow into the liquid collecting box along the flow measurement weir crest; the second liquid level sensor is arranged in the liquid collecting tank and used for detecting the water level change in the liquid collecting tank to obtain a second water level change signal; and the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying the first flow according to the first water level change signal and identifying the second flow according to the second water level change signal. The weir crest box and the liquid collecting box are combined to measure the flow, a section of water flow process is treated in a segmented mode, and the accurate measurement of the water flow can be realized under the conditions of stable flow or unstable flow.
Description
Technical Field
The embodiment of the invention relates to the technical field of runoff measurement, in particular to a runoff measurement device and a runoff measurement method.
Background
In recent years, as the urbanization development process is accelerated, flood disasters occur inside cities, and research on urban hydrology becomes a research hotspot. The accurate measurement of the urban flow is important for the quantitative research of urban internal runoff by urban hydrology, and has practical significance in urban rainfall flood simulation, scientific research and production practice of sponge cities and the like.
However, it is very difficult to accurately monitor the rainfall runoff, the domestic sewage of residents and other flows in a residential area during data acquisition at ordinary times, which is mainly because the flow is very unstable, and the traditional flow meter cannot accurately measure the flow, and is easy to generate errors.
Therefore, how to measure the flow rapidly, conveniently and accurately becomes a technical problem which needs to be solved urgently.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is to provide a runoff measuring device to measure flow rapidly, conveniently and accurately.
In order to solve the above problem, an embodiment of the present invention provides a runoff measuring apparatus, including:
a weir box comprising a flow measuring weir;
the first liquid level sensor is arranged in the weir crest tank to detect the water level change in the weir crest tank to obtain a first water level change signal;
the upper plane of the bottom plate of the weir box is higher than the upper opening of the weir box, so that the liquid flowing into the weir box can flow into the sump box along the flow measuring weir;
the second liquid level sensor is arranged in the liquid collecting tank and used for detecting the water level change in the liquid collecting tank to obtain a second water level change signal;
and the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying a first flow according to the first water level change signal and identifying a second flow according to the second water level change signal.
Optionally, the liquid collecting tank is provided with a drainage port, and the runoff measuring device further comprises:
and the automatic valve is positioned in the liquid collecting box and positioned at the discharge port to open and close the discharge port.
Optionally, the automatic valve comprises:
the magnetic block is fixed on the bottom plate of the liquid collecting box;
the magnetic valve is positioned in the liquid collecting tank;
the check block is fixed on the inner wall of the liquid collecting box, is positioned above the magnetic valve and is provided with a through hole for communicating the upper surface and the lower surface of the check block;
the buoyancy piece is positioned above the stop block;
and the connecting piece penetrates through the through hole to connect the magnetic valve and the buoyancy piece.
Optionally, the inner wall of the liquid collecting tank comprises a first stopper fixing portion and a second stopper fixing portion, the first stopper fixing portion is located above the second stopper fixing portion.
Optionally, the inner wall of the liquid collecting box is provided with a slide way, the slide way extends from bottom to top along the inner wall of the liquid collecting box, and the stop block is fixed on the inner wall of the liquid collecting box through the slide way.
Optionally, the automatic valve further comprises:
the first end of the energy storage spring is connected with the buoyancy piece, and the second end of the energy storage spring is connected with the magnetic valve.
Optionally, the energy storage spring is a stainless steel energy storage spring.
Optionally, the runoff measuring device further comprises:
the energy dissipation column is fixed in the liquid collection tank, a hollow cavity is formed in the energy dissipation column, and the automatic valve is arranged in the hollow cavity.
Optionally, the runoff measuring device further comprises:
and the filter screen grid is arranged at the water inlet of the weir crest box.
Optionally, the upper surface of the weir crest box is covered with a first rain baffle, and the upper surface of the liquid collecting box is covered with a second rain baffle.
Optionally, the weir box and the header box are both made of stainless steel.
Optionally, the flow measurement weir is a triangular weir.
Optionally, the weir box has a length that is at least 5 times the flow measurement weir height.
In order to solve the above problems, an embodiment of the present invention provides a runoff measuring method, which includes:
detecting the water level change in the weir crest tank to obtain a first water level change signal, and detecting the water level change in the liquid collecting tank to obtain a second water level change signal;
and identifying the first flow according to the first water level change signal, and identifying the second flow according to the second water level change signal.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:
the embodiment of the invention provides a runoff measuring device, which comprises: the weir crest box is provided with a flow measurement weir crest; the first liquid level sensor is arranged in the weir crest tank to detect the water level change in the weir crest tank to obtain a first water level change signal; the upper plane of the bottom plate of the weir box is higher than the upper opening of the weir box, so that the liquid flowing into the weir box can flow into the sump box along the flow measuring weir; the second liquid level sensor is arranged in the liquid collecting tank and used for detecting the water level change in the liquid collecting tank to obtain a second water level change signal; and the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying a first flow according to the first water level change signal and identifying a second flow according to the second water level change signal. When the runoff measurement device provided by the embodiment of the invention is used for measuring the runoff, the water flow to be measured is introduced into the weir crest box, the first liquid level sensor arranged in the weir crest box measures the height of the water level in the weir crest box to obtain a first water level change signal, and the first water level change signal is sent to the receiving and processing unit to calculate the first flow of the weir crest box; the water flow flows into the liquid collecting tank through the flow measuring weir port, a second liquid level sensor arranged in the liquid collecting tank detects the water level in the liquid collecting tank to obtain a second water level change signal, and the second water level change signal is sent to the receiving and processing unit to calculate the second flow in the liquid collecting tank, and meanwhile, the receiving and processing unit can carry out identification processing on the first flow and the second flow so as to take the second flow measured by the liquid collecting tank as the standard when the first flow and the second flow identified by the receiving and processing unit are changed greatly in the initial detection stage; when the first flow and the second flow identified by the receiving and processing unit are the same and the changes of the first flow and the second flow are smaller, the data measured by the liquid collecting tank are used as the standard. Furthermore, the runoff measuring device provided by the embodiment of the invention has a simple structure, is not easy to break down, and the liquid level sensor can improve the detection precision under the condition of lower cost.
In an alternative, the automatic valve of the runoff measuring device provided by the embodiment of the present invention further includes: the first end of the energy storage spring is connected with the buoyancy piece, and the second end of the energy storage spring is connected with the magnetic valve. When the water level rises to a preset height, the tension of the energy storage spring is greater than the suction force between the magnetic valve and the magnetic block, the magnetic valve rapidly moves upwards, the drainage port is opened, and drainage is started; the water level in the liquid collecting pool begins to drop, when the water level drops to a preset water level, the tension of the energy storage spring is smaller than the suction force between the magnets, and the magnetic valve is closed. The switch of the magnetic valve is controlled according to the change of the water level in the liquid collecting tank, so that the phenomenon of overflow of the liquid collecting tank in the flow measuring process can be prevented.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a front view of a runoff measuring apparatus provided by an embodiment of the present invention;
FIG. 2 is a schematic structural view of the top view of FIG. 1;
FIG. 3 is a schematic structural view of the left side view of FIG. 1;
fig. 4 is a partial schematic view of a runoff measuring apparatus according to an embodiment of the present invention.
Wherein: 10-a weir box; 100-flow measuring weir crest; 20-a header tank; 200-a drain port; 11-a first level sensor; 22-a second liquid level sensor; 30-energy dissipation columns; 40-a screen grid; 50-water inlet; 60-automatic valve; 61-magnetic block; 62-a magnetic valve; 63-a stop block; 64-a buoyancy member; 65-a connector; 66-energy storage spring.
Detailed Description
As is known in the art, conventional flow meters do not measure flow with sufficient accuracy.
Under the influence of complex field environment, most flow measurement methods mostly arrange a water collecting tank at a water outlet, but the water collecting tank can only realize the measurement of the total flow and cannot form a flow process; the triangular weir is a common one used in weir flow measurement at the present stage, and has the characteristics of low design cost, convenient use and the like. Conventional triangular weirs are typically used for steady flow measurements, however, the accuracy is poor for unsteady flows. Meanwhile, since most of the triangular weirs need manual measurement and calculation, it is difficult to obtain an approximately continuous flow process.
In order to measure the flow rapidly, conveniently and accurately, the embodiment of the invention provides a runoff measuring device, which comprises: the weir crest box is provided with a flow measurement weir crest; the first liquid level sensor is arranged in the weir crest tank to detect the water level change in the weir crest tank to obtain a first water level change signal; the upper plane of the bottom plate of the weir box is higher than the upper opening of the weir box, so that the liquid flowing into the weir box can flow into the sump box along the flow measuring weir; the second liquid level sensor is arranged in the liquid collecting tank and used for detecting the water level change in the liquid collecting tank to obtain a second water level change signal; and the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying a first flow according to the first water level change signal and identifying a second flow according to the second water level change signal. When the runoff measurement device provided by the embodiment of the invention is used for measuring the runoff, the water flow to be measured is introduced into the weir crest box, the first liquid level sensor arranged in the weir crest box measures the height of the water level in the weir crest box to obtain a first water level change signal, and the first water level change signal is sent to the receiving and processing unit to calculate the first flow of the weir crest box; the water flow flows into the liquid collecting tank through the flow measuring weir port, a second liquid level sensor arranged in the liquid collecting tank detects the water level in the liquid collecting tank to obtain a second water level change signal, and the second water level change signal is sent to the receiving and processing unit to calculate the second flow in the liquid collecting tank, and meanwhile, the receiving and processing unit can carry out identification processing on the first flow and the second flow so as to take the second flow measured by the liquid collecting tank as the standard when the first flow and the second flow identified by the receiving and processing unit are changed greatly in the initial detection stage; and (3) as time goes on, when the first flow and the second flow identified by the receiving processing unit are the same and the change of the first flow and the second flow is smaller, the data measured by the weir box are used as the standard. The weir crest box and the liquid collecting box are combined to measure the flow, a section of water flow process is treated in a segmented mode, and the accurate measurement of the water flow can be realized under the conditions of stable flow or unstable flow. Furthermore, the runoff measuring device provided by the embodiment of the invention has a simple structure, is not easy to break down, and the liquid level sensor can improve the detection precision under the condition of lower cost.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the indication of the direction or the positional relationship referred to in the present specification is based on the direction or the positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and it is not intended to indicate or imply that the indicated device must have a specific direction, be configured in a specific direction, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a runoff measuring device according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the top view of FIG. 1; FIG. 3 is a schematic structural view of the left side view of FIG. 1; fig. 4 is a partial schematic view of a runoff measuring apparatus according to an embodiment of the present invention.
As shown in the drawings, a runoff measuring device provided by an embodiment of the present invention includes:
a weir box 10 including a flow measurement weir 100;
the first liquid level sensor 11 is arranged in the weir box 10 to detect the water level change in the weir box 10 and obtain a first water level change signal;
a header tank 20 connected to the weir box 10, an upper floor of the weir box 10 being higher in plan than an upper opening of the header tank 20 so that the liquid flowing into the weir box 10 can flow into the header tank 20 along the flow measuring weir 100;
a second liquid level sensor 22 disposed in the header tank 20 to detect a change in a water level in the header tank 20 to obtain a second water level change signal;
and the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying a first flow according to the first water level change signal and identifying a second flow according to the second water level change signal.
In this embodiment, the flow measurement weir crest 100 is described as an example of a triangular weir crest, and the triangular weir has the characteristics of low design cost, convenience in use and the like, and is a current measuring device commonly used in weir flow measurement at the present stage. In other embodiments, the flow measurement weir 100 may also be a rectangular weir or other form of measurement weir.
In one embodiment, the weir box 10 has the water inlet 50 connected to a water flow pipe, and the weir box 10 can be as long and flat as possible to smooth the water flow and improve the measurement accuracy. The specific dimensions of the weir box 10 may be dependent on the operating conditions.
In a particular embodiment, the length of the weir box 10 is at least 5 times the height of the flow measurement weir 100 to further improve the accuracy of the measurement.
The fluid that awaits measuring uses the arrow direction in fig. 1 as the flow direction, and the user introduces the rivers that await measuring into weir notch case 10, and in the measurement process, first level sensor 11 measures the water level change in the weir notch case 10 and transmits the data of collecting for receiving processing unit, and second level sensor 22 measures the water level in the header tank 20 and transmits the data of collecting for receiving processing unit, and receiving processing unit basis first flow of first water level change signal sign, basis second water level change signal sign second flow.
In a specific embodiment, the receiving and processing unit identifies the first flow rate and the second flow rate by displaying a current flow rate and a flow rate process curve, and a user can determine whether the water flow is stable according to the flow rate curve. Of course, in other embodiments, the receiving processing unit may also identify the first traffic and the second traffic through other forms such as a table or a histogram.
According to the recommended weir trough flow measurement specification, when the vertex angle of the weir plate is between (30-120 degrees), the formula of the flow of the over-weir is calculated by the water level of the standard triangular weir as follows:
wherein: q1Measuring the flow rate of the fluid in m for a triangular weir3S; μ is the flux coefficient, about 0.6; theta is the vertex angle of the weir plate and the unit is degree; g is gravity acceleration, and is 9.8m/s2；h1The geometric head of the triangular weir is in m.
The triangular top angle of the thin-wall triangular weir faces downwards, the size of the top angle ranges from 30 degrees to 120 degrees, and calculation is convenient when the top angle is 90 degrees.
The formula for calculating the fluid flow in the header tank 20 is:
wherein: q2The flow rate of the fluid is measured for the header tank 20 in m3/s；h2The level of the fluid of the weir box 10 flowing into the header 20 is m; h is0Is the height of the liquid level in the initial liquid collecting tank 20 and has the unit of m; a is the length of the bottom of the liquid collecting box 20 and the unit is m; b is the bottom width of the liquid collecting tank 20, and the unit is m; Δ t is the time taken for the header tank 20 to meter flow in units of s.
When the final flow rate Q curve is drawn, if Q is initially unstable and discontinuous, Q becomes Q ═ Q2(ii) a When Q is1＝Q2Is and Q1、Q2After that, when the voltage is uniformly and continuously changed for a period of time, Q is equal to Q1。
The weir crest box and the liquid collecting box are combined to measure the flow, a section of water flow process is treated in a segmented mode, and the accurate measurement of the water flow can be realized under the conditions of stable flow or unstable flow. Furthermore, the runoff measuring device provided by the embodiment of the invention has a simple structure, is not easy to break down, and the liquid level sensor can improve the detection precision under the condition of lower cost.
Referring to fig. 1 and 4, in order to prevent the liquid in the header tank 20 from overflowing, in a specific embodiment, the header tank 20 is provided with a drain port 200, and the runoff measuring apparatus further includes:
and an automatic valve 60 disposed in the header tank 20 and at the drain port 200 to open and close the drain port 200.
Specifically, the automatic valve 60 may include:
the magnet block 61 is fixed on the bottom plate of the liquid collecting box 20;
a magnetic valve 62 located within the header tank 20;
the check block 63 is fixed on the inner wall of the liquid collecting box 20, is positioned above the magnetic valve and is provided with a through hole for communicating the upper surface and the lower surface of the check block 63;
a buoyancy member 64 located above the stopper 63;
and a connecting member 65 passing through the through hole to connect the magnetic valve and the buoyancy member 64.
The buoyancy piece 64 rises along with the rise of the water level of the liquid collecting tank 20, the connecting piece 65 connected with the buoyancy piece 64 stretches the magnetic valve 62, and when the buoyancy of the buoyancy piece 64 is larger than the attraction force between the magnetic valve 62 and the magnetic block 61, the magnetic valve 62 rapidly moves upwards, the drainage port 200 is opened, and drainage is started; the water level in the sump 20 begins to drop and the magnetic valve 62 closes when the buoyancy of the buoyancy member 64 is less than the attraction force between the magnets.
The runoff measuring device provided by the embodiment of the invention controls the opening and closing of the magnetic valve according to the change of the water level in the liquid collecting tank 20, and can prevent the overflow phenomenon of the liquid collecting tank 20 in the flow measuring process.
As shown in fig. 4, in one embodiment, the buoyancy member 64 is spherical for ease of manufacture, and in other embodiments, the buoyancy member 64 may be formed in other shapes.
The connection 65 may be a pull wire or any other object capable of functioning to connect the buoyancy member 64 and the magnetic valve 62.
The stopper 63 is used to limit the position of the magnetic valve 62, so as to prevent the magnetic valve 62 from being too far away from the magnetic block 61 under the driving of the buoyancy member 64 to be attracted to the magnetic block 61 again. In order to adjust the opening of the water valve, in one embodiment, the inner wall of the header tank 20 includes a first stopper fixing portion and a second stopper fixing portion to which the stopper 63 is fixed, and the first stopper fixing portion is located above the second stopper fixing portion.
In another embodiment, the inner wall of the header tank 20 is provided with a slide way extending along the inner wall of the header tank 20 from bottom to top, and the stopper 63 is fixed on the inner wall of the header tank 20 through the slide way. In this way, the stop 63 is continuously fixed to the inner wall of the header tank 20.
With continued reference to FIG. 4, in one particular embodiment, the automatic valve 60 may further comprise:
an energy storage spring 66, wherein a first end of the energy storage spring 66 is connected to the buoyancy element 64, and a second end of the energy storage spring 66 is connected to the magnetic valve 62. The buoyancy piece 64 rises along with the rise of the water level of the liquid collecting tank 20, the connecting piece 65 connected with the buoyancy piece stretches the energy storage spring 66, the tension of the energy storage spring 66 is increased, when the water level rises to a preset height, the tension of the energy storage spring 66 is larger than the suction force between the magnetic valve 62 and the magnetic block 61, the magnetic valve 62 rapidly moves upwards, the drainage port 200 is opened, and drainage is started; the water level in the header tank 20 begins to drop and when the water level drops to a predetermined level, the tension of the energy storage spring 66 is less than the attraction between the magnets and the magnetic valve 62 closes.
The automatic valve 60 utilizes the principle of energy conversion among buoyancy of water, elasticity of a spring and attraction of a magnet, and has the advantages of simple structure, low cost, energy conservation and environmental protection.
In one embodiment, the stored energy spring 66 is a stainless steel stored energy spring 66 to prevent long term corrosion in water.
With reference to fig. 1 and 2, in a specific embodiment, the runoff measuring apparatus further includes:
the energy dissipation column 30 is fixed in the liquid collection tank 20, a hollow cavity is formed in the energy dissipation column 30, and the automatic valve is arranged in the hollow cavity. The energy dissipation column 30 is of an upper end opening and a hollow structure, and energy dissipation holes are uniformly distributed in the outer wall of the energy dissipation column 30 and used for reducing impact of liquid on the inner wall of the container, so that the liquid level in the container is gentle and the measurement precision is improved.
As shown in fig. 2, in this embodiment, the energy dissipation columns 30 are disposed at the corners of the tank, the inner wall of the tank and the energy dissipation columns together form a hollow cavity, and the automatic valve is disposed in the hollow cavity of the energy dissipation columns 30, so that the space is saved.
As shown in fig. 3, in a specific embodiment, the runoff measuring apparatus may further include:
and the filter screen grid 40 is arranged at the water inlet of the weir box 10. Filter screen grid 40 is used for filtering impurity such as leaf, domestic waste in the aquatic, avoids blockking up the device, improve equipment measurement accuracy. When measuring, prevent that filter screen grid 40 from being blockked up by impurity such as leaf, should carry out regularly clearance.
In one embodiment, since the weir box 10 and the liquid collecting box 20 are both of an open-top design, foreign matters or rainwater can be prevented from entering during measurement, the upper surface of the weir box 10 is covered with a first rain baffle, and the upper surface of the liquid collecting box 20 is covered with a second rain baffle, for example, covered with a rain canvas. Of course, in other embodiments, the weir box 10 and the header 20 may also be designed as an upper sealing structure.
In one embodiment, the weir box 10 and the header box 20 are both made of stainless steel for cost savings. The weir box 10 is manufactured by cutting and welding stainless steel plates 304. Of course, in other embodiments, the weir box 10 and the header box 20 may be replaced with other materials, such as glass.
In order to solve the above problems, an embodiment of the present invention provides a runoff measuring method, which includes:
detecting the water level change in the weir crest tank to obtain a first water level change signal, and detecting the water level change in the liquid collecting tank to obtain a second water level change signal;
and detecting the water level change in the weir crest box, and obtaining a first water level change signal can be completed through a first liquid level sensor. And detecting the water level change in the liquid collecting tank, and obtaining a second water level change signal can be completed through a second liquid level sensor.
And identifying the first flow according to the first water level change signal, and identifying the second flow according to the second water level change signal.
Identifying the first flow Q according to the first water level change signal1And identifying the second flow Q according to the second water level change signal2This may be done by the receiving processing unit.
Specifically, the reception processing unit identifies the first traffic Q1And a second flow rate Q2The mode can be for showing current flow and flow process curve, and the user can judge whether rivers are stable according to the flow curve.
Of course, in other embodiments, the receiving processing unit may also identify the first traffic Q through other forms such as a table or a histogram1And a second flow rate Q2。
When the runoff measurement is carried out, water flow to be measured is introduced into the weir crest box, a first liquid level sensor arranged in the weir crest box measures the water level height in the weir crest box to obtain a first water level change signal, and the first water level change signal is sent to a receiving and processing unit to calculate the first flow Q of the weir crest box1(ii) a The water flows into the liquid collecting tank through the flow measuring weir port, the second liquid level sensor arranged in the liquid collecting tank detects the water level in the liquid collecting tank to obtain a second water level change signal, and the second water level change signal is sent to the receiving and processing unit to calculate the second flow Q in the liquid collecting tank2The receiving processing unit will simultaneously process the first flow Q1And a second flow rate Q2Performing identification processing so as to receive the first flow Q identified by the processing unit in the initial detection period1And a second flow rate Q2When the change of (2) is large, the second flow rate Q measured by the header tank2The method comprises the following steps of (1) taking; as time goes on, the first flow Q identified by the processing unit is received1And a second flow rate Q2And after the change of the weir box and the change of the weir box are smaller, the data measured by the weir box are used as the standard.
It is easily understood that, in the initial stage of detection, the first traffic Q identified by the processing unit is received1And a second flow rate Q2Is large, means that the initial water flow is unstable and discontinuous. As time goes on, the first flow Q identified by the processing unit is received1And a second flow rate Q2The same, and both of them are less variable, means when Q is1＝Q2Is and Q1、Q2And then uniformly and continuously changing stably for a period of time.
The embodiment of the invention provides a runoff measuring method, which adopts a combined flow measuring mode of a weir crest box and a liquid collecting box to carry out sectional treatment on a section of water flow process, so that the accurate measurement of the water flow can be realized under the conditions of stable flow and unstable flow. Furthermore, the runoff measuring device provided by the embodiment of the invention has a simple structure, is not easy to break down, and the liquid level sensor can improve the detection precision under the condition of lower cost.
Although the embodiments of the present invention have been disclosed, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A runoff measuring apparatus, comprising:
the weir crest box is provided with a flow measurement weir crest;
the first liquid level sensor is arranged in the weir crest tank to detect the water level change in the weir crest tank to obtain a first water level change signal;
the upper plane of the bottom plate of the weir box is higher than the upper opening of the weir box, so that the liquid flowing into the weir box can flow into the sump box along the flow measuring weir;
the second liquid level sensor is arranged in the liquid collecting tank and used for detecting the water level change in the liquid collecting tank to obtain a second water level change signal;
the receiving and processing unit is suitable for receiving the first water level change signal and the second water level change signal, identifying a first flow according to the first water level change signal and identifying a second flow according to the second water level change signal, so that in the initial detection period, when the first flow and the second flow identified by the receiving and processing unit are changed greatly, the second flow measured by the liquid collecting tank is taken as the standard; and (3) as time goes on, when the first flow and the second flow identified by the receiving processing unit are the same and the change of the first flow and the second flow is smaller, the data measured by the weir box are used as the standard.
2. The runoff measuring apparatus of claim 1 wherein the collection tank defines a drain opening, the runoff measuring apparatus further comprising:
and the automatic valve is positioned in the liquid collecting box and positioned at the discharge port to open and close the discharge port.
3. The runoff measuring apparatus of claim 2 wherein said automated valve comprises:
the magnetic block is fixed on the bottom plate of the liquid collecting box;
the magnetic valve is positioned in the liquid collecting tank;
the check block is fixed on the inner wall of the liquid collecting box, is positioned above the magnetic valve and is provided with a through hole for communicating the upper surface and the lower surface of the check block;
the buoyancy piece is positioned above the stop block;
and the connecting piece penetrates through the through hole to connect the magnetic valve and the buoyancy piece.
4. The runoff measuring apparatus of claim 3 wherein the interior wall of the collection tank includes a first stop securing portion and a second stop securing portion to which the stop is secured, the first stop securing portion being positioned above the second stop securing portion.
5. The runoff measuring apparatus of claim 4 wherein the interior wall of the collection tank is provided with a slideway extending along the interior wall of the collection tank from bottom to top, the stop being secured to the interior wall of the collection tank by the slideway.
6. The runoff measuring apparatus of any one of claims 3 to 5 wherein said automated valve further comprises:
the first end of the energy storage spring is connected with the buoyancy piece, and the second end of the energy storage spring is connected with the magnetic valve.
7. The runoff measuring apparatus of claim 6 wherein said stored energy spring is a stainless steel stored energy spring.
8. The runoff measuring apparatus of any one of claims 3 to 5 further comprising:
the energy dissipation column is fixed in the liquid collection tank, a hollow cavity is formed in the energy dissipation column, and the automatic valve is arranged in the hollow cavity.
9. The runoff measuring apparatus of any one of claims 1 to 5 further comprising:
and the filter screen grid is arranged at the water inlet of the weir crest box.
10. The runoff measuring apparatus of any one of claims 1 to 5 wherein said weir box and said header box are both stainless steel.
11. The flow measurement device of any one of claims 1 to 5, wherein the flow measurement weir is a triangular weir.
12. The runoff measuring apparatus of any one of claims 1 to 5 wherein the weir box has a length at least 5 times greater than the flow measuring weir height.
13. A method for measuring runoff using the runoff measuring apparatus according to any one of claims 1 to 12, comprising:
detecting the water level change in the weir crest tank to obtain a first water level change signal, and detecting the water level change in the liquid collecting tank to obtain a second water level change signal;
and identifying the first flow according to the first water level change signal, and identifying the second flow according to the second water level change signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3866028A (en) * | 1973-07-27 | 1975-02-11 | Manning Environmental Corp | Fluid flow measuring system and method |
| CN86206884U (en) * | 1986-09-11 | 1987-05-13 | 云南省水利水电科学研究所 | Water accumulating flowmeter for weir |
| JPH03214026A (en) * | 1989-07-26 | 1991-09-19 | Fuji Electric Co Ltd | Weir-type flow-rate measuring apparatus |
| CN2264363Y (en) * | 1995-05-18 | 1997-10-08 | 赵东进 | Sewage flowmeter |
| US6427718B1 (en) * | 2000-12-06 | 2002-08-06 | The United States Of America As Represented By The Secretary Of The Interior | Automated farm turnout |
| CN100387941C (en) * | 2006-04-25 | 2008-05-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Device and method for detecting water flow of gas tubine cooling blade |
| CN202048938U (en) * | 2011-04-18 | 2011-11-23 | 中国水利水电科学研究院 | Trench weir type flow meter |
| CN202177406U (en) * | 2011-07-29 | 2012-03-28 | 潍坊大禹水文科技有限公司 | Residential runoff generating process observation instrument |
| CN102401685B (en) * | 2011-11-17 | 2013-06-05 | 中国计量学院 | Method and device for carrying out online verification/calibration on open channel flowmeter |
| CN202718203U (en) * | 2012-07-20 | 2013-02-06 | 厦门瑞尔特卫浴科技股份有限公司 | Magnetic-control fast on-off water inlet valve |
| CN103438953B (en) * | 2013-09-12 | 2016-08-17 | 中国计量学院 | A kind of portable ground tank capacity field calibration device and calibration method |
| CN205483087U (en) * | 2016-03-07 | 2016-08-17 | 北京师范大学 | Portable surface runoff measuring tank |
| CN106703115B (en) * | 2017-01-20 | 2019-02-15 | 山东聊建集团有限公司 | A kind of intelligent use in toilet Sewage treatment utilizes emptier |
| CN208026321U (en) * | 2018-04-02 | 2018-10-30 | 上海元易勘测设计有限公司 | Automatic flow measuring system based on triangular-notch weir |
| CN208238853U (en) * | 2018-05-18 | 2018-12-14 | 中国农业科学院农业资源与农业区划研究所 | A kind of canal capacity automated watch-keeping facility |
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