CN112800380A - River section flow measuring device and method - Google Patents
River section flow measuring device and method Download PDFInfo
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- CN112800380A CN112800380A CN202110119129.4A CN202110119129A CN112800380A CN 112800380 A CN112800380 A CN 112800380A CN 202110119129 A CN202110119129 A CN 202110119129A CN 112800380 A CN112800380 A CN 112800380A
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- G06F17/10—Complex mathematical operations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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Abstract
The invention discloses a river section flow measuring device, and aims to overcome the defects that the existing river flow measuring device is complex in structure, high in cost and poor in accuracy of measuring results. The river flow measuring device comprises a plurality of measuring units arranged at the bottom of a river, wherein the measuring units are distributed to the other end at intervals along one end of the cross section of the river, each measuring unit comprises a measuring frame and a detecting column, the detecting column is arranged on the measuring frame, a dynamic pressure sensor is arranged at one end of the detecting column, a static pressure sensor is arranged on the side wall of the detecting column, and the dynamic pressure sensors are opposite to the incoming flow direction of the river. The river section flow measuring device is simple in structure, low in cost and accurate in measuring result.
Description
Technical Field
The present invention relates to a flow measuring device, and more particularly, to a river section flow measuring device and method.
Background
The river flow measurement has important significance in the fields of water conservancy project design, flood control and disaster reduction early warning, environmental protection, industrial and agricultural production and the like, and the current methods for river flow measurement comprise flow measurement methods such as cable channel automatic measurement, acoustic Doppler flow measurement, ultrasonic chromatography flow measurement, water level descent method flow measurement and the like. However, the conventional measurement method has a complex structure, poor measurement result accuracy and high measurement equipment cost.
Disclosure of Invention
The invention overcomes the defects of complex structure, high cost and poor accuracy of the measurement result of the existing river flow measuring device, and provides the river section flow measuring device and the method.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a river cross section flow measuring device, is including installing a plurality of measuring unit in the river bottom, and the measuring unit is laid the other end along the one end interval of river cross-section, and the measuring unit includes measuring frame, detection post, and the detection post is installed on measuring frame, detects post one end installation dynamic pressure sensor, detects post side wall installation static pressure sensor, and dynamic pressure sensor just is the incoming flow direction of river.
The river section flow measuring device is used for measuring operation and comprises the following steps: a. a plurality of measuring units are arranged at the bottom of the river, and the horizontal distance between the detection columns of two adjacent measuring units is respectively delta L1、△L2、△L3…△LiThe depth of the detection column of the measuring unit to the bottom of the river is H2(ii) a b. The front end of a detection column on the measuring unit is just opposite to the incoming flow direction of the river, and a dynamic pressure sensor and a static pressure sensor on the detection column detect the water pressure to obtain the flowing total pressure P of the water flow1iAnd hydrostatic pressure P2i(ii) a c. Processing the measured data, wherein the depth of the detection column position of the ith measuring unit is H1i=（P2i-P0) /(. rho.g), where. rho is the water flow density, P0At atmospheric pressure, total water depth Hi= H1i+ H2(ii) a The flow velocity of water flow at the position of the ith measuring unit is calculated by the formula
The cross-sectional area of the river is
(ii) a Total flow of
. The device utilizes the basic fluid mechanics principle, converts fluid pressure on a measuring section into flow velocity, and combines the geometric section area integral of the section to obtain the flow data of the river section. The device has the advantages of simple structure, accurate measurement result, lower cost and suitability for flow measurement of rivers with any section, and the device can measure the water level height synchronously while measuring the flow velocity, so that the measurement accuracy is high.
Preferably, a support rod is installed on the detection column, the support rod is rotatably installed on the measuring frame, an empennage is arranged at the rear end of the detection column, the dynamic pressure sensor is installed at the front end of the detection column, and the support rod is arranged at the front end of the deflection detection column.
The detection post passes through the bracing piece and rotates to be installed on measuring the frame, and the bracing piece is partial to detecting the setting of post front end moreover, detects the post rear end and is equipped with the fin, consequently arrange the detection post in rivers and receive the effect of rivers after, can remain throughout to detect the post front end just to the incoming flow direction of river, has guaranteed the precision that dynamic pressure sensor detected.
Preferably, the rear end of the detection column is connected with a pull rope, and the pull rope is connected with a floating ball. The floater is pulling the detection post rear end through the stay cord, is strikeed backward by rivers when the floater floats, and the floater provides the power of pulling to detection post rear end, is favorable to pulling the detection post to the front end just to the incoming flow direction of rivers.
Preferably, a sliding rod and a rotating shaft are arranged on the measuring frame, a sliding seat is arranged on the sliding rod in a sliding mode, the detection column is arranged on the sliding seat, a rotating disc and a plurality of blades driven to rotate by water flow impact are connected to the rotating shaft, and a connecting rod is hinged between the rotating disc and the sliding seat.
Water flow impacts the blades to drive the rotating shaft to rotate, so that the rotary table rotates, the rotary table drives the sliding seat to reciprocate on the sliding rod through the connecting rod, the detection column can detect water pressure at different positions, and the accuracy of detection data is improved.
Preferably, the measuring frame is connected with a push rod capable of moving transversely and a push rod capable of moving vertically, the push rod is arranged towards the sliding seat, a return spring is connected between the push rod and the measuring frame, and the push rod is provided with an obliquely arranged pushing surface; the connecting seat is arranged on the sliding seat, one end of the connecting seat is hinged on the sliding seat, the other end of the connecting seat and the sliding seat are connected with a positioning spring, a top plate extending outwards is arranged on the connecting seat, and the ejector rod is abutted between the top plate and the pushing surface.
Flowing leaves and various impurities exist in the river, and the flowing leaves and the impurities are easily attached to the dynamic pressure sensor at the front end of the detection column, so that the accuracy of detection data is influenced. After the slide moved the push rod position, the butt was to the push rod on, and promote the push rod and remove, top pushing surface on the push rod is to on the ejector pin and promote the ejector pin rebound, on the ejector pin upper end butt was to the roof, thereby promote connecting seat one end upwards rotation, make the connecting seat slope set up, thereby make the slope of detection post set up, the leaf and all kinds of debris that paste on dynamic pressure sensor this moment just can be washed away by rivers easily, avoid on these things laminate the dynamic pressure sensor who detects the post front end, influence the accuracy that detects data.
Preferably, a contact switch is mounted on the slide base at a position corresponding to the push rod. The slide pushes the push rod to move through the contact switch, the contact switch is connected after the contact switch is abutted to the push rod, and the dynamic pressure sensor and the static pressure sensor are controlled to stop working through signals of the contact switch. When the contact switch is separated from the push rod, the contact switch is disconnected, and the dynamic pressure sensor and the static pressure sensor are controlled to continue working through signals of the contact switch.
Preferably, the sliding seat is connected with an abutting plate, the abutting plate is arranged above the connecting seat, and the positioning spring abuts between the abutting plate and the connecting seat. The butt plate ensures reliable connection of the connecting seat.
Preferably, a plurality of support legs are arranged on the measuring frame, a support plate is arranged at the lower end of each support leg, and a plurality of positioning contact pins are arranged on the support plate. The supporting plate and the positioning contact pin are arranged to ensure reliable support of the measuring frame.
A river cross-section flow measuring method utilizes river cross-section flow to measureThe measuring device performs a measuring operation, comprising the steps of: a. a plurality of measuring units are arranged at the bottom of the river, and the horizontal distance between the detection columns of two adjacent measuring units is respectively delta L1、△L2、△L3…△LiThe depth of the detection column of the measuring unit to the bottom of the river is H2(ii) a b. The front end of a detection column on the measuring unit is just opposite to the incoming flow direction of the river, and a dynamic pressure sensor and a static pressure sensor on the detection column detect the water pressure to obtain the flowing total pressure P of the water flow1iAnd hydrostatic pressure P2i(ii) a c. Processing the measured data, wherein the depth of the detection column position of the ith measuring unit is H1i=（P2i-P0) /(. rho.g), where. rho is the water flow density, P0At atmospheric pressure, total water depth Hi= H1i+ H2(ii) a The flow velocity of water flow at the position of the ith measuring unit is calculated by the formula
The cross-sectional area of the river is
(ii) a Total flow of
。
Compared with the prior art, the invention has the beneficial effects that: the river section flow measuring device is simple in structure, low in cost and accurate in measuring result.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the measuring unit of the present invention;
FIG. 3 is an enlarged partial schematic view of FIG. 2 of the present invention;
in the figure: 1. the device comprises a measuring unit, 2, a measuring frame, 3, a detecting column, 4, a dynamic pressure sensor, 5, a static pressure sensor, 6, a supporting rod, 7, a tail wing, 8, a pull rope, 9, a floating ball, 10, a sliding rod, 11, a rotating shaft, 12, a sliding seat, 13, a rotating disc, 14, a blade, 15, a connecting rod, 16, a push rod, 17, a push rod, 18, a return spring, 19, a return spring, 20, a pushing surface, 21, a connecting seat, 22, a positioning spring, 23, a top plate, 24, a contact switch, 25, an abutting plate, 26, a supporting leg, 27, a supporting plate, 28, a positioning pin, 29 and a mounting groove.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): a river section flow measuring device (see figures 1 to 3) comprises a plurality of measuring units 1 arranged at the bottom of a river, and the measuring units are arranged at intervals along one end of the river section to the other end. The measuring unit comprises a measuring frame 2 and a detecting column 3, wherein the detecting column is arranged on the measuring frame, one end of the detecting column is provided with a dynamic pressure sensor 4, the side wall of the detecting column is provided with a static pressure sensor 5, and the dynamic pressure sensor is over against the incoming flow direction of the river.
Detect the epaxial erection bracing pole 6 of post, the bracing piece rotates to be installed on measuring the frame, detects the post rear end and is equipped with fin 7, and dynamic pressure sensor installs at the detection post front end, and the bracing piece is partial to be detected the post front end setting. The rear end of the detection column is connected with a pull rope 8, and the pull rope is connected with a floating ball 9. The measuring frame is provided with a sliding rod 10 and a rotating shaft 11, the sliding rod is horizontally arranged, a sliding seat 12 is arranged on the sliding rod in a sliding mode, the sliding seat can only move on the sliding rod but cannot rotate, the detecting column is arranged on the sliding seat, the rotating shaft is connected with a rotating disc 13 and a plurality of blades 14 which are driven to rotate by water flow impact, and a connecting rod 15 is hinged between the rotating disc and the sliding seat.
A push rod 16 capable of moving transversely and a push rod 17 capable of moving vertically are connected to the measuring frame, the push rod is arranged towards the sliding seat, a return spring 18 is connected between the push rod and the measuring frame, a return spring 19 is connected between the push rod and the measuring frame, and a pushing surface 20 arranged obliquely is arranged on the push rod; a connecting seat 21 is arranged on the sliding seat, one end of the connecting seat is hinged on the sliding seat, a positioning spring 22 is connected between the other end of the connecting seat and the sliding seat, a top plate 23 extending outwards is arranged on the connecting seat, a top rod is abutted between the top plate and a pushing surface, and rollers are arranged at the upper end and the lower end of the top rod. A contact switch 24 is mounted on the slide at a position corresponding to the push rod. The sliding seat is connected with an abutting plate 25, the abutting plate is arranged above the connecting seat, and the positioning spring abuts between the abutting plate and the connecting seat. The measuring rack is provided with a plurality of support legs 26, the lower ends of the support legs are provided with supporting plates 27, and the supporting plates are provided with a plurality of positioning pins 28. The slide is provided with mounting slots 29 corresponding to the connecting sockets, in which the connecting sockets are mounted.
Flowing leaves and various impurities exist in the river, and the flowing leaves and the impurities are easily attached to the dynamic pressure sensor at the front end of the detection column, so that the accuracy of detection data is influenced. After the slide moved the push rod position, the butt was to the push rod on, and promote the push rod and remove, top pushing surface on the push rod is to on the ejector pin and promote the ejector pin rebound, on the ejector pin upper end butt was to the roof, thereby promote connecting seat one end upwards rotation, make the connecting seat slope set up, thereby make the slope of detection post set up, the leaf and all kinds of debris that paste on dynamic pressure sensor this moment just can be washed away by rivers easily, avoid on these things laminate the dynamic pressure sensor who detects the post front end, influence the accuracy that detects data.
A river section flow measuring method utilizes a river section flow measuring device to carry out measuring operation, and comprises the following steps: a. a plurality of measuring units are arranged at the bottom of the river, and the horizontal distance between the detection columns of two adjacent measuring units is respectively delta L1、△L2、△L3…△LiThe depth of the detection column of the measuring unit to the bottom of the river is H2(ii) a b. The front end of a detection column on the measuring unit is just opposite to the incoming flow direction of the river, and a dynamic pressure sensor and a static pressure sensor on the detection column detect the water pressure to obtain the flowing total pressure P of the water flow1iAnd hydrostatic pressure P2i(ii) a c. Processing the measured data, wherein the depth of the detection column position of the ith measuring unit is H1i=（P2i-P0) /(. rho.g), where. rho is the water flow density, P0At atmospheric pressure, total water depth Hi= H1i+ H2(ii) a The flow velocity of water flow at the position of the ith measuring unit is calculated by the formula
The cross-sectional area of the river is
(ii) a Total flow of
。
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (9)
1. The utility model provides a river cross section flow measuring device, characterized by is including installing a plurality of measuring unit in the river bottom, and the measuring unit is laid the other end along the one end interval of river cross-section, and the measuring unit includes measuring frame, detection post, and the detection post is installed on measuring frame, detects post one end installation dynamic pressure sensor, detects post side wall installation static pressure sensor, and dynamic pressure sensor just is the incoming flow direction of river.
2. A river cross-section flow measuring device as claimed in claim 1, wherein the detecting post is provided with a support rod, the support rod is rotatably mounted on the measuring frame, the rear end of the detecting post is provided with a tail wing, the dynamic pressure sensor is mounted at the front end of the detecting post, and the support rod is arranged to be offset to the front end of the detecting post.
3. The device for measuring the flow of a river section as claimed in claim 1, wherein a pull rope is connected to the rear end of the detection post, and a floating ball is connected to the pull rope.
4. A river cross-section flow measuring device according to claim 1, 2 or 3, wherein a slide rod and a rotating shaft are mounted on the measuring frame, a slide seat is slidably mounted on the slide rod, the detecting column is mounted on the slide seat, the rotating shaft is connected with a rotating disk and a plurality of blades which are driven to rotate by water flow impact, and a connecting rod is hinged between the rotating disk and the slide seat.
5. A river cross section flow measuring device according to claim 4, wherein a push rod capable of moving transversely and a push rod capable of moving vertically are connected to the measuring frame, the push rod is arranged towards the slide seat, a return spring is connected between the push rod and the measuring frame, and an obliquely arranged pushing surface is arranged on the push rod; the connecting seat is arranged on the sliding seat, one end of the connecting seat is hinged on the sliding seat, the other end of the connecting seat and the sliding seat are connected with a positioning spring, a top plate extending outwards is arranged on the connecting seat, and the ejector rod is abutted between the top plate and the pushing surface.
6. A river cross-section flow measuring device according to claim 5, wherein a contact switch is mounted on the slide base at a position corresponding to the push rod.
7. A river cross-section flow measuring device according to claim 5, wherein the slide carriage is connected to an abutting plate, the abutting plate is disposed above the connecting base, and the positioning spring abuts between the abutting plate and the connecting base.
8. A river cross-section flow measuring device as claimed in claim 1, wherein the measuring frame is provided with a plurality of support legs, the support legs are provided at lower ends thereof with support plates, and the support plates are provided with a plurality of positioning pins.
9. A river cross-section flow measuring method characterized by performing a measuring operation using the river cross-section flow measuring device according to any one of claims 1 to 8, comprising the steps of: a. a plurality of measuring units are arranged at the bottom of the river, and the horizontal distance between the detection columns of two adjacent measuring units is respectively delta L1、△L2、△L3…△LiThe depth of the detection column of the measuring unit to the bottom of the river is H2(ii) a b. The front end of a detection column on the measuring unit is just opposite to the incoming flow direction of the river, and a dynamic pressure sensor and a static pressure sensor on the detection column detect the water pressure to obtain the flowing total pressure P of the water flow1iAnd hydrostatic pressure P2i(ii) a c. Processing the measured data with the ith measuring unit detecting the depth of the column positionH1i=（P2i-P0) /(. rho.g), where. rho is the water flow density, P0At atmospheric pressure, total water depth Hi= H1i+ H2(ii) a The flow velocity of water flow at the position of the ith measuring unit is calculated by the formula
The cross-sectional area of the river is
(ii) a Total flow of
。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119129.4A CN112800380B (en) | 2021-01-28 | 2021-01-28 | River section flow measuring device and method |
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|---|---|---|---|
| CN202110119129.4A CN112800380B (en) | 2021-01-28 | 2021-01-28 | River section flow measuring device and method |
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| CN112800380A true CN112800380A (en) | 2021-05-14 |
| CN112800380B CN112800380B (en) | 2022-09-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001710A (en) * | 2021-10-14 | 2022-02-01 | 水利部水土保持监测中心 | High-precision channel flow cross-section area measuring device and measuring method |
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| CN211877120U (en) * | 2020-04-30 | 2020-11-06 | 天津理岩安核科技发展有限公司 | River and lake water flow and flow velocity detection device |
| CN212060234U (en) * | 2020-05-29 | 2020-12-01 | 张磊 | Water quality monitoring device |
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2021
- 2021-01-28 CN CN202110119129.4A patent/CN112800380B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699688A (en) * | 2016-01-22 | 2016-06-22 | 唐明良 | Device and method for measuring flowing speed and quantity of fluid |
| CN208420960U (en) * | 2018-05-14 | 2019-01-22 | 交通运输部天津水运工程科学研究所 | A kind of auxiliary locator that current meter tests the speed |
| CN110954069A (en) * | 2019-10-25 | 2020-04-03 | 天津水运工程勘察设计院 | River section probing type accurate flow measuring device and method |
| CN211877120U (en) * | 2020-04-30 | 2020-11-06 | 天津理岩安核科技发展有限公司 | River and lake water flow and flow velocity detection device |
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| CN114001710A (en) * | 2021-10-14 | 2022-02-01 | 水利部水土保持监测中心 | High-precision channel flow cross-section area measuring device and measuring method |
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