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A kind of water metering calibration method

A calibration method and water level technology, applied in the field of calibration, can solve problems such as unsatisfactory installation conditions, influence on enterprise operation, difficulty in ensuring measurement accuracy, etc., and achieve the effect of improving measurement accuracy

Active Publication Date: 2017-02-01
GUANGDONG RES INST OF WATER RESOURCES & HYDROPOWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, there are certain difficulties in adding measurement equipment to existing water intake households: if the measurement scheme is redesigned according to the flow installation requirements and the construction and installation are carried out according to the requirements, the normal operation of the enterprise will often be affected, resulting in huge economic and social impacts; if the design is not redesigned Construction, using the original conditions of the enterprise for measurement, often because the installation conditions do not meet the relevant specifications, the measurement accuracy is difficult to guarantee

Method used

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  • A kind of water metering calibration method
  • A kind of water metering calibration method
  • A kind of water metering calibration method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Taking a power plant as an example, when the overflow weir is in the state of free flow, the physical model of the overflow weir is also in the state of free flow. The physical model H of the overflow weir can be obtained through physical experiments. 上 The relationship curve with the overcurrent flow, the relationship diagram is as follows image 3 shown.

[0039] Visible, in different H 上 Under working conditions, there is a fixed flow rate, and then through regression analysis, the relationship between the above flow rate and H is obtained.

[0040] This relational expression is generally the same as the relational expression of the conventional weir type, but the coefficients are different, which is for the overflow weir of this power plant.

[0041] For example, the relational expression of the overflow weir of a certain power plant is obtained through experiments as follows:

[0042] Q=20.255×H 堰上 1.5554

[0043] In the formula: Q is flow rate; H 堰上 is the ...

Embodiment 2

[0049] Taking a water plant as an example, when the overflow weir is in the state of free flow, the physical model of the overflow weir is also in the state of free flow. Through physical experiments, the flow Q and the upstream and downstream water levels of the physical model of the overflow weir can be obtained are related, the relationship diagram is as follows Figure 4 As shown, it can be seen that the abscissa axis represents the upstream water level, and the ordinate axis represents the downstream water level respectively, and a straight line in the figure represents a flow rate respectively. In this way, a linear regression is proposed to obtain the relationship between water level and flow rate under different flow conditions , see Table 2,

[0050] Table 2

[0051] serial number Flow (m 3 / s)

Relative water head relationship between upstream and downstream R 1 1 h 上 =0.8546H 下 +0.1441

0.9978 2 2 h 上 =0.6628H 下 +0.3756

...

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Abstract

The invention discloses a water taking metering and calibrating method. The water taking metering and calibrating method includes: building a physical overflow-weir model according to certain model scale, recording overflow passing the overflow-weir model, upper level data and lower level data of the overflow passing the physical overflow-weir model, determining correlation between the overflow and the upper level or / and the lower level by a correlated test and analysis method, recording the upper level data and the lower level data of an overflow weir to obtain the correlation and then acquire overflow of the overflow weir, and comparing the overflow of the overflow weir with flow metered by a flow meter and obtaining a correction factor. In the water taking metering and calibrating method, metering accuracy in correlated non-perfect state can be greatly improved. Besides, the water taking metering and calibrating method can be widely applied to calibration of similar water taking metering and can provide forceful technical support for metering management in the current strictest water resource management.

Description

technical field [0001] The invention relates to a calibration method, in particular to a water intake measurement calibration method for water intake households with overflow weirs of suction and drainage wells in the intake and drainage process. Background technique [0002] At present, with the implementation of the most stringent water resources management system in my country, water intake metering has become the basic condition for water intake users to legally draw water, and the accuracy of water intake metering is directly related to the amount of water resource fees paid by water intake users. Therefore, each water user needs to install water intake Metering equipment, and be able to measure as accurately as possible. Then, there are certain difficulties in adding measurement equipment to existing water intake households: if the measurement scheme is redesigned according to the flow installation requirements and the construction and installation are carried out accor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
Inventor 黄本胜邱静郭磊韩松赵吉国洪昌红邱颂曦吉红香刘中峰王丽雯
Owner GUANGDONG RES INST OF WATER RESOURCES & HYDROPOWER