Water measuring groove for measuring open channel water intake quantity

A technology for measuring water tanks and water volume, which is applied in the field of water flow measurement. It can solve the problems that the sensitivity of small flow measurement needs to be further improved, the accuracy of flow measurement and the state of water flow are not good enough, and the sediment deposition in channels has not been solved, so as to achieve good sand discharge effect, Improved measurement accuracy and simple structure

Inactive Publication Date: 2008-10-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flow measurement accuracy and water flow state are not as good as those of the long-throat tank, and the specific size of the measuring tank can only be built according to the standard size, which has poor adaptability
[0003] Aiming at the poor flow measurement accuracy of the long-throat measuring tank when the water flow is small, people have been constantly exploring and researching the measuring tank with a new structure to solve the existing problems
In March 2003, the third issue of "China Soil and Water Conservation Science" published a paper titled "A Kind of Ideal Water Measuring Structure——Flat V-shaped Weir", which disclosed a new structure of water measuring tank. The structure of the measuring tank - flat V-shaped weir, the accuracy of small flow measurement has been improved to a certain extent, and the flow measurement range is larger, but the problem of sediment deposition in the channel has not been solved, and the sensitivity of small flow measurement needs to be further improved

Method used

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  • Water measuring groove for measuring open channel water intake quantity
  • Water measuring groove for measuring open channel water intake quantity
  • Water measuring groove for measuring open channel water intake quantity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The water measuring tank used to measure the water intake of the open channel described in this embodiment has a shape and structure such as Figure 5 ~ Figure 8 Shown. It is composed of an upstream gradual contraction section, a throat section, and a downstream gradual expansion section. The throat section is formed by a three-way contraction through a slope, that is, gradually shrinking from the two groove walls and the groove bottom. The throat section is U-shaped. There is a sub-slot in the center of the groove bottom of the U-shaped throat section, and the sub-slot section is rectangular. Length of measuring tank L 0 About 3.1B 0 , The upstream gradual contraction section L 1 About 0.6B 0 , Throat section L 2 About 1.2B 0 , The downstream gradual expansion section L 3 About 1.3B 0 , The height of the throat section H 1 About 0.3B 0 , Throat section groove width B 1 About 0.8B 0 . Sub-slot width B 2 About 0.2B 0 , Sub-slot height H 2 About 0.1B 0 , B0 Is the channel wid...

Embodiment 2

[0035] The water measuring tank used to measure the water intake of the open channel described in this embodiment has a shape and structure such as Figure 9 ~ Figure 12 Shown. It is composed of an upstream gradual contraction section, a throat section and a downstream gradual expansion section. The throat section is formed by a three-way contraction through a slope, that is, gradually shrinks from the two groove walls and the groove bottom. The throat section is U-shaped. There is a sub-slot in the center of the groove bottom of the U-shaped throat section, and the sub-slot section is trapezoidal. Length of measuring tank L 0 About 2.8B 0 , The upstream gradual contraction section L 1 About 0.5B 0 , Throat section L 2 About 1.5B 0 , The downstream gradual expansion section L 3 About 0.8B 0 , The height of the throat section H 1 About 0.3B 0 , Throat section groove width B 1 About 0.9B 0 . Width of upper and bottom of trapezoid of sub-slot section B 2 About 0.4B 0 , Bottom width B ...

Embodiment 3

[0037] The water measuring tank used to measure the water intake of the open channel described in this embodiment is similar in shape and structure to that of Example 2. It is also composed of an upstream gradual contraction section, a throat section, and a downstream gradual expansion section. The throat section passes through the slope from Three-way shrinkage is formed, that is, it gradually shrinks from the two groove walls and the groove bottom. The throat section is U-shaped. The U-shaped throat section has a sub-groove at the center of the groove bottom. The difference is that the sub-groove section is V shape. Length of measuring tank L 0 About 2.6B 0 , The upstream gradual contraction section L 1 About 0.6B 0 , Throat section L 2 About 1.2B 0 , The downstream gradual expansion section L 3 About 0.8B 0 , The height of the throat section H 1 About 0.25B 0 , Throat section groove width B 1 About 0.85B 0 . V-shaped sub-slot width B 2 About 0.4B 0 , Sub-slot height H 2 About 0...

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Abstract

The invention discloses a water measuring tank for measuring the water intake of an open channel, which is composed of an upstream gradually contracting section, a throat section and a downstream expanding and connecting section step by step. U-shaped, and a sub-groove is designed in the center of the groove bottom of the U-shaped throat section, and the width B2 of the sub-groove is 0.1 to 0.5 times the width B0 of the open channel. The water measuring tank for measuring the water intake of an open channel disclosed by the invention has the characteristics of high measurement accuracy for small flow rates, good sand discharge performance, no silt formation in the water measuring tank, simple structure, and low engineering cost. It is especially suitable for the measurement of water intake in open channels with large flow rate fluctuations and serious sedimentation.

Description

Technical field [0001] The invention relates to a water measuring device used for measuring water flow in water conservancy and hydropower projects, in particular to a water measuring device for measuring water intake in an open channel, and belongs to the technical field of water flow measurement. Background technique [0002] Both industrial and agricultural water use paid water, and accurate and convenient measurement of water withdrawal is the basis for implementing this policy. In the measurement of water intake, the measurement of open channel water intake is more difficult. At present, the measuring equipment for water intake in open channels often uses long-throat measuring flume and non-throat measuring flume. The structure of the long-throat measuring flume is as attached Figure 1 ~ Figure 4 As shown, it is composed of an upstream constricted section, a throat section, and a downstream divergent section. The throat section contracts in three directions, and the bottom ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01F15/00G01F1/704
Inventor杨庆戴光清许唯临高旭东苏华英王海云谢红强肖明砾
OwnerSICHUAN UNIV