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Underwater on-line monitoring equipment anti-scour method and device

A monitoring equipment and anti-scouring technology, which is applied in water conservancy projects, hydropower, hydropower stations, etc., can solve the problems of online monitoring, pipeline stress/strain vibration signal online monitoring difficulties, etc., and improve the ability to resist water shock , Simple structure, simple and easy method

Active Publication Date: 2015-04-08
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure pipeline has no exposed open pipe section or only a small section of open pipe section, and the online monitoring is not considered during the construction and installation of the pressure pipeline, which brings great challenges to the online monitoring of stress / strain and vibration signals of such pipelines. Difficulties
[0003] Under the current technical conditions, for pressure pipelines with no obvious pipe sections, on-line monitoring can only be carried out in the water in the pipeline

Method used

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  • Underwater on-line monitoring equipment anti-scour method and device
  • Underwater on-line monitoring equipment anti-scour method and device
  • Underwater on-line monitoring equipment anti-scour method and device

Examples

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Embodiment Construction

[0028] Now take the on-line monitoring equipment (with a size of 0.2×0.2×0.2, hereinafter referred to as equipment) in the pressure pipeline of a hydropower station as an example to illustrate the anti-scouring method of the present invention:

[0029] Step 1. Through data query and on-site measurement, it is determined that the maximum average velocity of the water flow at the site to be monitored is 10m / s, and the impact force of the water flow is calculated as 20kN / m according to the following formula.

[0030] P = kγ 0 h V 2 g · 1 - cos α sin α = kγ 0 h V 2 g tan α ...

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Abstract

The invention discloses an underwater on-line monitoring equipment anti-scour method and device. The relation of water flow impacting force and the included angle of the water flow direction and an equipment chocked flow face and the relation of the height of the chocked flow face and the water flow speed are obtained based on a hydraulics theory, and therefore the corresponding relation between the water flow impacting force and the included angle is obtained. In the field, the included angle between the water flow direction and the equipment chocked flow face is changed so that the water flow impacting force can be adjusted, and the anti-scour device which can adjust the included angle between the water flow direction and the equipment chocked flow face is designed according to the anti-scour method. The underwater on-line monitoring equipment anti-scour method is simple and easy to achieve, the anti-scour device is simple in structure and convenient to operate, underwater on-line monitoring equipment is made to be adaptive to changeable water flow environments through the method and device, and the water flow scour prevention capacity is improved.

Description

technical field [0001] The invention relates to hydraulic equipment detection technology, in particular to an anti-scouring method and device for underwater online monitoring equipment. Background technique [0002] The penstocks, volutes, and draft pipes of the hydropower station are all buried in rock concrete, and the water flow in the pipes impacts the turbine to rotate and generate electricity. The pressure pipeline has no exposed open pipe section or only a small section of open pipe section, and the online monitoring is not considered during the construction and installation of the pressure pipeline, which brings great challenges to the online monitoring of stress / strain and vibration signals of such pipelines. Difficulties. [0003] Under the current technical conditions, for pressure pipelines with no obvious pipe sections, on-line monitoring can only be carried out in the water in the pipeline. The underwater online monitoring equipment used, in addition to meeti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B9/06
CPCY02E10/20
Inventor 唐远富陈红冬龙毅刘纯彭碧草沈丁杰欧阳克俭
Owner STATE GRID HUNAN ELECTRIC POWER
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