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Method for measuring and calculating flow of water distribution port of water supply channel

A water diversion and flow technology, applied in the direction of water supply equipment, water supply equipment, water supply main pipeline, etc., can solve the problems of high cost, damage to the integrity of the physical structure of the pipeline, and achieve the effect of avoiding measurement errors

Active Publication Date: 2019-10-15
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires damage to the integrity of the pipeline's physical structure and is costly

Method used

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  • Method for measuring and calculating flow of water distribution port of water supply channel
  • Method for measuring and calculating flow of water distribution port of water supply channel

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment is a method for measuring and calculating the flow rate of a water supply channel water outlet. The method uses at least one reference water supply pipeline that is the same as the water supply pipeline to be tested. The water supply channel water supply pipeline system of the water supply pipeline to be tested and the reference water supply pipeline includes : sequentially connected main canal 1, underground water delivery culvert 2, storage tank 3, water supply pipe 4, flow meter well 5 and maintenance well 6 are arranged successively along the water supply direction on the described water supply pipe, and described flow meter well is provided with Flowmeter well pressure gauge 7 and pipeline flowmeter 8, described maintenance well is provided with maintenance well pressure gauge 9, is also provided with culvert flowmeter 10 in underground water delivery culvert, as figure 1 shown.

[0028] Large-scale water supply channels have many same types of wate...

Embodiment 2

[0068] This embodiment is an improvement of the first embodiment, and is a refinement of the relative roughness uncertainty threshold of the first embodiment. The roughness relative uncertainty threshold described in this embodiment is 3-7%.

[0069] The roughness relative uncertainty threshold is generally set at about 5%, which is determined based on factors such as experience and norms. The determination of its scope should neither be too large nor too small. If it is too large, the precision will not be enough to determine the precise roughness; if it is too small, the investment in instruments and equipment will be too large, which is economically uneconomical.

Embodiment 3

[0071] This embodiment is an improvement of the first embodiment, and is a refinement of the relative uncertainty threshold of the flow rate in the first embodiment. The flow relative uncertainty threshold described in this embodiment is 3-7%.

[0072] The relative uncertainty threshold of flow rate is generally set at about 5%, which is determined based on factors such as experience and norms. The determination of its scope should neither be too large nor too small. If it is too large, the accuracy will not be enough to determine the precise flow rate, if it is too small, the investment in instruments and equipment will be too large, which is not economically cost-effective.

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Abstract

The invention relates to a method for measuring and calculating flow of a water distribution port of a water supply channel. The method comprises the following steps: determining the measurement uncertainty of a reference water supply pipeline system; determining the measurement uncertainty of measurement parameters of a reference water supply pipeline; calculating the relative uncertainty of theroughness rate; judging the relative uncertainty of the roughness rate of the reference water supply pipeline; calculating the roughness rate; determining the measurement uncertainty of a to-be-measured water supply pipeline system; determining the measurement uncertainty of the measurement parameters of a to-be-measured water supply pipeline; calculating the relative uncertainty of flow measurement and calculation; judging the relative uncertainty of the flow of the to-be-measured water supply pipeline; and calculating the flow. According to the method in the invention, the data of the reference pipeline is used for performing roughness rate relative uncertainty calculation and judging whether the reference error is within an allowable range; through the judgement of the relative uncertainty of the flow of the to-be-measured pipeline and the measuring and calculating precision of the to-be-measured pipeline, the pipeline is not subjected to any change of perforation and arrangement ofaddition equipment and the like, the flow data can be accurately acquired by only utilizing the existing pipeline and the read number of various measuring instruments, and metering errors are avoided.

Description

technical field [0001] The invention relates to a method for measuring and calculating the flow of a water outlet of a water supply channel, which is a measurement method, and is a method for measuring liquid flow in a non-destructive manner. Background technique [0002] A water diversion port is set on the side of the large water supply channel, and water is supplied to the water plant through the underground water delivery culvert-reservoir tank-water supply pipeline. For the needs of fair measurement of water fees and project management, the water supply side and the water side install flowmeters on culverts and pipelines to check each other. In order to facilitate pipeline maintenance and repair, maintenance wells are arranged on the water supply pipeline. In the flowmeter well and maintenance well, pressure gauges are installed on the pipe wall. [0003] Affected by many factors, there is often a large difference in the measurement of the water supply side and the wa...

Claims

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Application Information

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IPC IPC(8): G01F1/00G01F15/02E03B1/02E03B3/04E03B7/02
CPCE03B1/02E03B3/04E03B7/02G01F1/002G01F15/02
Inventor 崔巍陈文学穆祥鹏李想刘丰
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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