LU102473B1 - Apparatus for Measuring Shallow Water Flow Velocity - Google Patents
Apparatus for Measuring Shallow Water Flow Velocity Download PDFInfo
- Publication number
- LU102473B1 LU102473B1 LU102473A LU102473A LU102473B1 LU 102473 B1 LU102473 B1 LU 102473B1 LU 102473 A LU102473 A LU 102473A LU 102473 A LU102473 A LU 102473A LU 102473 B1 LU102473 B1 LU 102473B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- crossbeam
- vertical beam
- downward vertical
- support
- flow velocity
- Prior art date
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Classifications
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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
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
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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
- G01F1/20—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 detection of dynamic effects of the flow
- G01F1/28—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 detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The apparatus comprises a support, wherein height of four legs of the support can be adjusted according to a water depth; a first downward vertical beam and a second downward vertical beam are symmetrically arranged on center points of transverse crossbeams at two ends of the support; a crossbeam is fixed between the first downward vertical beam and the second downward vertical beam; and a flexible spring and a water blocking separation blade are installed on the crossbeam, wherein the flexible spring is sleeved on the crossbeam, one end of the flexible spring is located at the junction of the crossbeam and the first downward vertical beam and the other end is fixed with the water blocking separation blade. The water blocking separation blade can freely slide along the crossbeam which is taken as a track. A detachable scale plate is installed on one side of the support.
Description
' LU102473
DESCRIPTION Apparatus for Measuring Shallow Water Flow Velocity
TECHNICAL FIELD The present invention relates to an apparatus for measuring water flow velocity, in particular to an apparatus for measuring shallow water flow velocity. The apparatus can be appropriately adjusted in size and calibrated based on acquired test data, so that the apparatus can be widely applied to measurement of water flow velocity with different sediment concentrations, such as measurement of water flow velocity on slopes and channels in researches on soil and water conservation.
BACKGROUND Soil erosion is very serious in the large arid and semi-arid areas of China, so that the measurement of water flow velocity on slopes and channels, especially the measurement of shallow water flow velocity, is of great significance to researches on soil and water conservation. The measurement and research of water flow velocity is the basic work for quantitative analysis of the sediment carrying capacity of soil stripping agents. Currently, the water flow velocity is measured by color and saline solution tracer methods in many soil erosion models. However, there is a gap between the water flow velocity obtained by tracer methods and actual water flow velocity due to water flow beds resulting from changes in roughness of water flow slopes under natural conditions. In addition, differences in sediment concentrations in different river basins also lead to errors in velocity measurement, which affects the accuracy of prediction results of soil erosion models. On this basis, it is very important to develop an apparatus for measuring shallow water flow velocity that can be applied to a variety of conditions.
’ LU102473
SUMMARY The purpose of the present invention is to provide an apparatus for measuring shallow water flow velocity. The apparatus can be widely applied to measurement of water flow velocity on slopes and channels in researches on water and soil conservation. The apparatus has the characteristics of simple structure, easy operation and low cost.
In order to achieve the above tasks, the present invention adopts the following technical solution: An apparatus for measuring shallow water flow velocity, comprising a support, characterized in that height of four legs of the support can be adjusted according to a water depth: a first downward vertical beam and a second downward vertical beam are symmetrically arranged on center points of transverse crossbeams at two ends of the support; a crossbeam is fixed between the first downward vertical beam and the second downward vertical beam: and a flexible spring and a water blocking separation blade are installed on the crossbeam, wherein the flexible spring is sleeved on the crossbeam, one end of the flexible spring is fixed at the junction of the crossbeam and the first downward vertical beam and the other end is fixed with the water blocking separation blade. The water blocking separation blade can freely slide along the crossbeam which is taken as a track. A detachable scale plate is installed on one side of the support.
According to the apparatus for measuring shallow water flow velocity of the present invention, the whole apparatus can be disassembled and assembled to become portable, with the characteristics of easy operation, simple maintenance, low cost and high measurement accuracy. The support can be properly adjusted according
> LU102473 to the water depth and inserted into slope soil, so that the apparatus is applicable to measuring the shallow water flow velocity on slopes with different gradients. When the water flow velocity on slopes is stable, the flexible spring is stretched due to impact of water flow on the water blocking separation blade, resulting in a certain deformation. According to Hooke's law, the spring deformation with a certain stiffness coefficient is proportional to the pulling (pushing) force, that is, AF=KxAl. Based on the relationship between measured flow velocity and flexible spring deformation Al, the regression relationship of flow velocity U is obtained: U=f(Al). The flexible spring deformation Al can be obtained from a scale plate temporarily fixed (removable) on the support G (dark green} to calculate the water flow velocity U.
BRIEF DESCRIPTION OF THE FIGURES Fig. 1 is a structural diagram of an apparatus for measuring shallow water flow velocity of the present invention, wherein Fig. 1(a) is a front view, Fig. 1(b) is a top view of Fig. 1(a), and Fig. 1(c) is a left view of Fig. 1(a). The arrows and bullseyes in the figures indicate the water flow direction, and the size of each part can be adjusted appropriately.
Fig. 2 shows deformation of a flexible spring D under two conditions, in condition (D in Fig. 2, the flexible spring is in the original state, not stretched or compressed, and the deformation is Al=0, while in condition ©, the deformation of the flexible spring D read from the scale plate F is Al=x after water flow impact at a certain velocity.
The present invention will be further described in detail in combination with drawings and embodiments.
DESCRIPTION OF THE INVENTION |. Structural design According to Fig. 1, the embodiment provides an apparatus for measuring shallow water flow velocity, comprising a support (G), height of four legs of the support (G) can be adjusted according to a water depth, a first downward vertical beam (A) and a second downward vertical beam (B) are symmetrically arranged on center points of transverse crossbeams at two ends of the support (G), a crossbeam (C) is fixed between the first downward vertical beam (A) and the second downward vertical beam (B), and a flexible spring (D) and a water blocking separation biade (E) are instalied on the crossbeam (C), wherein the flexible spring (D) is sleeved on the crossbeam (C), one end of the flexible spring (D) is fixed at the junction of the crossbeam (C) and the first downward vertical beam (A), and the other end is fixed with the water blocking separation blade (E), the water blocking separation blade (E) can freely slide along the crossbeam (C) which is taken as a track, and a detachable scale plate (F) is installed on one side of the support (G).
During operation, the scale plate (F) is fixed to one side of the whole support (G) (as shown in Fig. 2), with scales attached to the lower end for easy reading of deformation data of the flexible spring (D).
IH. Working principle The reason why the apparatus for measuring shallow water flow velocity of the present invention can measure (calculate) surface flow velocity of slopes lies in the following aspects: first, height of the support (G) can be adjusted by four telescopic legs, so that the crossbeam (C) can be kept exactly consistent with the overland flow profile; and second, the flexible spring (D) forms a certain deformation Al due to water impact on the water blocking separation blade (E).
Ill. Application method
1. The height of four legs of the support (G) is adjusted according to the measured slope gradient, so that the crossbeam (C) is kept basically consistent with the overland flow profile.
2. The flexible spring deformation Al is read according to different water flow velocities on the slope, and the actual water flow velocity is measured by an electronic current meter. The data recording format is shown in the following table.
3. From the step 2, the relationship between overland flow velocity and deformation can be obtained, and a relational expression U=f(Al) can be established.
4. In practice, it is only necessary to read the deformation Al of the flexible spring (D) through the scale plate (F) and substitute the deformation Al into the formula U=f(Al) to calculate the actual overland flow velocity.
Claims (1)
1. An apparatus for measuring shallow water flow velocity comprising a support (G), characterized in that height of four legs of the support (G) can be adjusted according to a water depth, a first downward vertical beam (A) and a second downward vertical beam (B) are symmetrically arranged on center points of transverse crossbeams at two ends of the support (G), a crossbeam (C) is fixed between the first downward vertical beam (A) and the second downward vertical beam (B), and a flexible spring (D) and a water blocking separation blade (E) are installed on the crossbeam (C), wherein the flexible spring (D) is sleeved on the crossbeam (C), one end of the flexible spring (D) is fixed at the junction of the crossbeam (C) and the first downward vertical beam (A), and the other end is fixed with the water blocking separation blade (E), the water blocking separation blade (E) can freely slide along the crossbeam (C) which is taken as a track, and a detachable scale plate (F) is installed on one side of the support (G).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU102473A LU102473B1 (en) | 2021-02-02 | 2021-02-02 | Apparatus for Measuring Shallow Water Flow Velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU102473A LU102473B1 (en) | 2021-02-02 | 2021-02-02 | Apparatus for Measuring Shallow Water Flow Velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU102473B1 true LU102473B1 (en) | 2021-08-04 |
Family
ID=77125673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU102473A LU102473B1 (en) | 2021-02-02 | 2021-02-02 | Apparatus for Measuring Shallow Water Flow Velocity |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU102473B1 (en) |
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2021
- 2021-02-02 LU LU102473A patent/LU102473B1/en active IP Right Grant
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| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20210804 |