CN112433266A - Tipping bucket and weir combined type rainwater inlet flow measuring device - Google Patents

Tipping bucket and weir combined type rainwater inlet flow measuring device Download PDF

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Publication number
CN112433266A
CN112433266A CN202011495151.0A CN202011495151A CN112433266A CN 112433266 A CN112433266 A CN 112433266A CN 202011495151 A CN202011495151 A CN 202011495151A CN 112433266 A CN112433266 A CN 112433266A
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China
Prior art keywords
weir
water
tipping bucket
bucket
crest
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Pending
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CN202011495151.0A
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Chinese (zh)
Inventor
关春雨
邱文新
于燃
李翀
史骏
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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Beijing General Municipal Engineering Design and Research Institute Co Ltd
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Priority to CN202011495151.0A priority Critical patent/CN112433266A/en
Publication of CN112433266A publication Critical patent/CN112433266A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01WMETEOROLOGY
    • G01W1/00Meteorology
    • G01W1/14Rainfall or precipitation gauges

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Atmospheric Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a combined rainwater port flow measuring device of a tipping bucket and a weir, which comprises a water collecting bucket, a counting tipping bucket, a reed pipe, a tipping bucket automatic counting and timing device, a stepped weir crest, a side weir plate, a bottom plate and an impeller type water flow sensor, wherein the water collecting bucket is connected with the water collecting bucket; the stepped weir crests are symmetrically arranged at the front edge of the bottom plate in a mode that the middle part is lower and the two sides are gradually raised, the height of the middle weir crest relative to the bottom plate is zero, and the outermost pair of weir crests are connected with the side weir plates and are equal in height; the rainwater inflow port is arranged on the side weir plate at the rear end, and the bottom plate in the weir pool is a flow guide plate plane with a certain gradient and inclines towards the outlet at the lowest position; except the lowest weir crest, an impeller type water flow sensor is arranged below the water outlet side of each other weir crest; a water collecting hopper for receiving rainwater flowing out of the lowest weir crest is arranged below the middle weir crest, and an automatic counting tipping bucket is arranged at an outlet below the water collecting hopper. The invention can solve the technical problems of limited measuring range of the existing tipping bucket rain gauge and poor accuracy of flow meters such as a Pasteur measuring tank and the like.

Description

Tipping bucket and weir combined type rainwater inlet flow measuring device
Technical Field
The invention relates to a rainwater runoff flow monitoring device, in particular to a tipping bucket and weir combined rainwater outlet flow measuring device.
Background
In recent years, extreme weather phenomena frequently occur, waterlogging occurs in many cities, serious influence is brought to production and life of people, and great loss is brought to life and property of people. Therefore, it is necessary to provide a powerful basis for urban construction, industrial and agricultural production and the like, solve the problem of urban waterlogging and accurately measure rainfall.
The tipping bucket rain gauge has the advantages of simple structure, low power consumption, stable performance, accurate time, automatic data recording, convenience for data acquisition, compilation, processing and the like, and is widely applied to the hydrometeorology industry. However, in practical application, the problem of large measurement error often occurs, and more accurate data can be obtained only by repeated adjustment, so that the test efficiency is greatly reduced. The existing tipping bucket rain gauge has the defects of weak adaptability to rain intensity change, capability of only ensuring the metering precision in a partial rain intensity range and small application range.
Disclosure of Invention
The invention aims to provide a tipping bucket and weir combined type rainwater inlet flow measuring device, which aims to solve the technical problems of limited measuring range and poor precision outside the measuring range of the existing tipping bucket type rain gauge.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a tipping bucket and weir combined gutter inlet flow measuring device comprises an automatic counting tipping bucket and an automatic measuring weir unit, wherein the automatic measuring tipping bucket comprises a catchment bucket, a counting tipping bucket and a tipping bucket automatic counting and timing device; the automatic metering weir unit comprises a stepped weir crest, a side weir plate, a bottom plate and an impeller type water flow sensor; the stepped weir crests are symmetrically arranged at the front edge of the bottom plate in a mode that the middle part is lower and the two sides are gradually raised, the height of the middle weir crest relative to the bottom plate is zero, and the outermost pair of weir crests is connected with the side weir plates; the weir pool consists of a bottom plate, side weir plates at the left side, the right side and the rear side and a stepped weir crest, a rainwater inflow port is arranged on the side weir plate at the rear end of the weir pool, the stepped weir crest forms a rainwater metering outlet of the weir pool, the bottom plate in the weir pool is a guide plate plane with a certain gradient and inclines towards the outlet at the lowest position; except the lowest weir crest, an impeller type water flow sensor is arranged below the water outlet side of each other weir crest; a water collecting hopper for receiving rainwater flowing out of the lowest weir crest is arranged below the middle weir crest, and an automatic counting tipping bucket is arranged at an outlet below the water collecting hopper.
The automatic counting tipping bucket comprises two water storage buckets symmetrically arranged at two sides and a middle rotating shaft; the openings of the two water storage hoppers are opposite; when rainwater enters one of the water storage hoppers from the water collection hopper, the hopper becomes a water receiving hopper, the other water storage hopper is a water-free hopper, the moment of the water receiving hopper is gradually increased along with the continuous increase of the water quantity of the water receiving hopper, and when the critical point of the rotation of the counting tipping bucket is reached, the moment of the water receiving hopper is larger than the moment of the water-free hopper, so that the original balance is broken, the counting tipping bucket automatically rotates, the rainwater in the water receiving hopper is poured out completely, and the counting tipping bucket becomes the water-free hopper; meanwhile, the original waterless bucket begins to receive water, becomes a water receiving bucket and begins to work, and the operation is repeated in this way.
The impeller type water flow sensor is a mechanical sensor and provides a water flow signal through the position of the magnetic steel arranged on the outer edge of the impeller relative to the reed pipe.
When the automatic counting tipping bucket rotates, the magnetic steel fixed on the tipping bucket scans the reed switch arranged on the stroke of the magnetic steel once, the reed switch is closed once instantaneously due to magnetization, and the automatic counting device of the tipping bucket sends a counting signal.
The rainwater inflow port is connected with a rectifying device and a pretreatment device, the rectifying device is a rainwater collecting and converging device, and the pretreatment device is a device for intercepting large-particle sundries and comprises a group of automatic cleaning grille nets and a storage frame; the storage frame is located the low department of self-cleaning grid, and the debris that holds back on the self-cleaning graticule mesh are come the water flush to the storage frame in.
The overall size of the weir pool is 450mm in length, 1400mm in width and 200mm in height, the total length of the stepped weir is 1400mm, and the total vertical height of the weir is 30 mm; the height of each stepped weir crest is 0, 10, 20 and 30mm from bottom to top in sequence, and the length of each weir crest is 200 mm; the side weir plate is vertically fixed on the bottom plate, the side weir plate is 450mm long and 200mm high.
The invention has the beneficial effects that:
firstly, the device overcomes the problem that the tipping bucket type rain gauge can ensure the metering precision of smaller rain intensity and has larger metering error when the rain intensity is larger. Meanwhile, the defect that the traditional thin-wall weir cannot simultaneously give consideration to the accurate measurement of small flow and the effective discharge of large flow is overcome.
The device can completely collect the water amount of the road surface runoff converged into the rainwater port at the source, accurately test the influx flow, is convenient to install and maintain, can automatically record data and is convenient for data acquisition and compilation processing, and is convenient for the whole runoff process monitoring of the rainwater port watershed in the flood season.
In conclusion, the invention has the characteristics of adaptability to various rain intensity ranges, strong reliability, low manufacturing cost, high metering precision and convenience in acquisition and processing of output signals.
Drawings
Fig. 1 is a schematic top view of a flow measuring device for a combined gutter inlet with a skip and a weir provided by the present invention.
Fig. 2 is a bottom view of fig. 1.
Fig. 3 is a left side view of fig. 2.
Numbering in the figures: 1. the water collecting bucket, the counting tipping bucket 2, the reed pipe 3, the step weir crest 4, the side weir plate 5, the bottom plate 6 and the impeller type water flow sensor 7.
Detailed Description
The automatic counting skip bucket comprises an automatic counting skip bucket body and an automatic metering weir unit, wherein the automatic metering skip bucket body comprises a water collecting skip bucket, a counting skip bucket body, a reed pipe and a skip bucket automatic counting and timing device; the automatic metering weir unit comprises a stepped weir crest, a side weir plate, a bottom plate and an impeller type water flow sensor; the stepped weir crests are symmetrically arranged at the front edge of the bottom plate in a mode that the middle part is lower and the two sides are gradually raised, the height of the middle weir crest relative to the bottom plate is zero, and the outermost pair of weir crests is connected with the side weir plates; the weir pool consists of a bottom plate, side weir plates at the left side, the right side and the rear side and a stepped weir crest, a rainwater inflow port is arranged on the side weir plate at the rear end of the weir pool, the stepped weir crest forms a rainwater metering outlet of the weir pool, the bottom plate in the weir pool is a guide plate plane with a certain gradient and inclines towards the outlet at the lowest position; except the lowest weir crest, an impeller type water flow sensor is arranged below the water outlet side of each other weir crest; a water collecting hopper for receiving rainwater flowing out of the lowest weir crest is arranged below the middle weir crest, and an automatic counting tipping bucket is arranged at an outlet below the water collecting hopper.
One embodiment of the specific structure of the present invention is shown in fig. 1, 2 and 3.
The stepped weir 4 is arranged vertical to the bottom plate 6, the lowest part is provided with an outlet which is connected with the counting tipping bucket 2, and the side weir plate 5 is also connected with two sides of the stepped weir 4 vertical to the bottom plate 6.
The counting tipping bucket 2 completes flow measurement under small flow with the assistance of the water collecting bucket 1, the reed pipe 3, the tipping bucket automatic counting and timing device and the like. Rainfall flowing out of the lowest weir crest enters a counting tipping bucket 2 through a water collecting bucket 1, the counting tipping bucket 2 is provided with two water storage buckets which are symmetrically arranged, when rainwater enters one of the water storage buckets from the water collecting bucket 1, the bucket becomes a water receiving bucket, and the other water storage bucket is a non-bucket. The integral gravity center of the counting tipping bucket 2 gradually shifts along with the gradual increase of the water quantity accumulated in the water receiving bucket, the moment of the counting tipping bucket is gradually increased along with the continuous increase of the water quantity of the water receiving bucket, when the critical point of the rotation of the counting tipping bucket is reached, the moment of the water receiving bucket is greater than the moment of the water-free bucket, the original balance is broken, the counting tipping bucket 2 automatically rotates, rainwater in the water receiving bucket is poured out, and the counting tipping bucket becomes the water-free bucket; meanwhile, the original waterless bucket begins to receive water, becomes a water receiving bucket and begins to work, and the operation is repeated in this way. When the tipping bucket rotates, the magnetic steel fixed on the tipping bucket scans the reed pipe 3 once. The reed switch 3 is instantaneously closed once due to magnetization, and the automatic counting device sends a counting signal to realize the metering of water quantity. According to the rotation condition and the rotation times of the counting tipping bucket, the water quantity in a certain period of time can be calculated in real time.
The weir pond overall dimension is for length 450mm, wide 1400mm, high 200mm, and the minimum weir height is 0, forms an export. The total length of the stepped weir 4 is 1400mm, and the total vertical height of the weir is 30 mm. The height of each step weir crest is 0, 10, 20 and 30mm from bottom to top in sequence, and the length is 200 mm. An impeller type water flow sensor 7 is arranged at the water outlet of each weir crest.
The side weir plate 5 is a thin-wall vertical plate along the water flow direction, is connected with two sides of the stepped weir notch 4 and is vertically fixed on the bottom plate 6, and the side weir plate is 450mm long and 200mm high.
The bottom plate 6 is set for meeting the requirements of fixing the stepped weir 4 and the side weir plates 5 and preventing water leakage and scouring, and has the length of 1400mm and the width of 450 mm.
Rainwater flows into the device through the rectifying device and the pretreatment device, and after water flows in, the rainwater firstly flows out of the weir crest at the lowest position and enters the tipping bucket, and the tipping bucket automatically measures the rotation times and starts to time, so that the corresponding rainwater amount is measured. When the water quantity is increased, the weirs positioned at two sides begin to discharge water step by step, the water outlet impacts the impeller of the water flow sensor to begin to count and time until the rainfall drops, no water flows out of the weir crest, and the time is stopped when the impeller stops rotating. The water quantity entering the device in a certain period is calculated by counting the water outlet time of the inductor at each stage of weir crest and the rotation times of the tipping bucket.
The impeller type water flow sensor arranged below the water outlet side of each weir crest except the lowest weir crest is a mechanical sensor, and a water flow signal is provided through the position of the magnetic steel arranged on the outer edge of the impeller relative to the reed switch.
In the invention, the height difference of each weir port is not suitable to be too large, so that the flow rate can be limited in a small range.
In the invention, the weir height at the lowest position is 0, namely an outlet is formed, and the weir pond is a plane with a certain gradient and a guide plate and is inclined towards the outlet at the lowest position, so that sediment deposition is prevented.
The device is characterized in that a rectifying device and a pretreatment device are arranged in front of the weir, the rectifying device can enable all the incoming water to be gathered into the device after entering the gutter inlet, the incoming water is uniformly distributed, the pretreatment device can intercept large-particle sundries, the device comprises a group of automatic cleaning grids, the self-cleaning function is realized, the sundries intercepted on the grids can be washed to a special storage frame at the lower part of the grids by the incoming water, and the special storage frame is cleaned regularly.
The automatic counting and timing device for the tipping bucket has the advantages that the automatic counting and timing device for the rotation of the impeller is simple in design and can be realized by electromagnetic equipment, data are stored in the PLC module, and the battery can be adopted for power supply due to low power consumption, so that the automatic counting and timing device is convenient to set in different places.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also fall into the scope of the invention, and the scope of the invention is defined by the claims.

Claims (6)

1. A tipping bucket and weir combined gutter inlet flow measuring device is characterized by comprising an automatic counting tipping bucket and an automatic measuring weir unit, wherein the automatic measuring tipping bucket comprises a water collecting bucket, a counting tipping bucket and a tipping bucket automatic counting and timing device; the automatic metering weir unit comprises a stepped weir crest, a side weir plate, a bottom plate and an impeller type water flow sensor; the stepped weir crests are symmetrically arranged at the front edge of the bottom plate in a mode that the middle part is lower and the two sides are gradually raised, the height of the middle weir crest relative to the bottom plate is zero, and the outermost pair of weir crests is connected with the side weir plates; the weir pool consists of a bottom plate, side weir plates at the left side, the right side and the rear side and a stepped weir crest, a rainwater inflow port is arranged on the side weir plate at the rear end of the weir pool, the stepped weir crest forms a rainwater metering outlet of the weir pool, the bottom plate in the weir pool is a guide plate plane with a certain gradient and inclines towards the outlet at the lowest position; except the lowest weir crest, an impeller type water flow sensor is arranged below the water outlet side of each other weir crest; a water collecting hopper for receiving rainwater flowing out of the lowest weir crest is arranged below the middle weir crest, and an automatic counting tipping bucket is arranged at an outlet below the water collecting hopper.
2. The combined gutter inlet flow measuring device of claim 1, wherein the automatic counting skip comprises two water storage hoppers symmetrically arranged at two sides and a rotating shaft in the middle; the openings of the two water storage hoppers are opposite; when rainwater enters one of the water storage hoppers from the water collection hopper, the hopper becomes a water receiving hopper, the other water storage hopper is a water-free hopper, the moment of the water receiving hopper is gradually increased along with the continuous increase of the water quantity of the water receiving hopper, and when the critical point of the rotation of the counting tipping bucket is reached, the moment of the water receiving hopper is larger than the moment of the water-free hopper, so that the original balance is broken, the counting tipping bucket automatically rotates, the rainwater in the water receiving hopper is poured out completely, and the counting tipping bucket becomes the water-free hopper; meanwhile, the original waterless bucket begins to receive water, becomes a water receiving bucket and begins to work, and the operation is repeated in this way.
3. The combined gutter inlet flow measuring device according to claim 1, wherein the impeller type flow sensor is a mechanical sensor for providing a flow signal by a magnetic steel provided on an outer edge of the impeller in a position corresponding to a reed pipe.
4. The combined gutter inlet flow measuring device according to claim 1, wherein the magnetic steel fixed to the skip sweeps the reed switch provided on the trip of the skip once when the automatic counting skip rotates, the reed switch is instantaneously closed once by magnetization, and the skip automatic counting device transmits a counting signal.
5. The combined rainwater inlet flow measuring device of the skip bucket and the weir as recited in claim 1, wherein the rainwater inlet is connected with a rectifying device and a preprocessing device, the rectifying device is a rainwater collecting and converging device, the preprocessing device is a device for intercepting large-particle sundries, and comprises a group of automatic cleaning grille nets and storage frames; the storage frame is located the low department of self-cleaning grid, and the debris that holds back on the self-cleaning graticule mesh are come the water flush to the storage frame in.
6. The combined gutter inlet flow measuring device of claim 1, wherein the overall dimensions of the weir pool are 450mm long, 1400mm wide and 200mm high, the total length of the stepped weir is 1400mm, and the total vertical height of the weir is 30 mm; the height of each stepped weir crest is 0, 10, 20 and 30mm from bottom to top in sequence, and the length of each weir crest is 200 mm; the side weir plate is vertically fixed on the bottom plate, the side weir plate is 450mm long and 200mm high.
CN202011495151.0A 2020-12-17 2020-12-17 Tipping bucket and weir combined type rainwater inlet flow measuring device Pending CN112433266A (en)

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Application Number Priority Date Filing Date Title
CN202011495151.0A CN112433266A (en) 2020-12-17 2020-12-17 Tipping bucket and weir combined type rainwater inlet flow measuring device

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Application Number Priority Date Filing Date Title
CN202011495151.0A CN112433266A (en) 2020-12-17 2020-12-17 Tipping bucket and weir combined type rainwater inlet flow measuring device

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CN112433266A true CN112433266A (en) 2021-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113075753A (en) * 2021-03-23 2021-07-06 中国水利水电科学研究院 Mountain torrent protection method and monitoring system based on terraced fields for intercepting surface runoff

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113075753A (en) * 2021-03-23 2021-07-06 中国水利水电科学研究院 Mountain torrent protection method and monitoring system based on terraced fields for intercepting surface runoff

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