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Method and system used for detecting pipeline sediment distribution and computer storage medium

A technology for detecting pipelines and sediments, applied in measuring devices, geophysical measurements, instruments, etc., can solve the problem of inability to quantitatively and accurately detect the distribution of sediments in pipelines

Active Publication Date: 2017-11-07
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current pressure wave technology can only qualitatively identify local pipeline blockage, that is, it can only determine the location and length of the blockage, but cannot quantitatively and accurately detect the specific distribution of sediment in the pipeline

Method used

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  • Method and system used for detecting pipeline sediment distribution and computer storage medium
  • Method and system used for detecting pipeline sediment distribution and computer storage medium
  • Method and system used for detecting pipeline sediment distribution and computer storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] In order to verify the feasibility of the method provided by the embodiments of the present application, an experimental system is set, and the schematic diagram of the experimental system is as follows Figure 9 shown. The station spacing of the horizontal pipeline is 100km, the inner diameter of the pipeline is 443mm, the absolute equivalent roughness of the pipeline is 0.01mm, and the elastic modulus is 207×103MPa. The density of the experimental fluid is 842.1kg / m 3 , the head of the pump at the first station is 30m. A regulating valve is arranged on the pipeline. There are regulating valves in the middle station of the first station. The downstream boundary is the valve and the fixed water level tank, which produces a constant pressure of 0.4MPa at the end of the fixed water level tank pipeline. It is assumed that the system can exert its maximum conveying capacity under the premise of satisfying the above conditions.

[0168] Assume that there is a 2km conges...

Embodiment 2

[0173] It is exactly the same as the pump-pipeline system in Example 1. Assume that there is a local blockage between the second station, and its parameters are shown in Table 3. Assume that the end valve is closed instantly, and two measurement points are set (at the end and 10km away from the end), can be obtained as Figure 11 The head change diagram shown. Assume now that by measuring Figure 11 The water head change diagram shown requires the clogging coefficients of the seven clogged sections (respectively k 1 、k 2 、k 3 、k 4 、k 5 、k 6 、k 7 ).

[0174] First of all, according to the method described in the patent specification, the calculation program for the transient flow of the fluid pipeline with partial blockage is compiled; then, the optimal objective function value function in discrete form is written; and through observation Figure 11 Medium pressure waveform, add the following constraints: k 1 2 3 4 , and k 4 ﹥k 5 ﹥k 6 ﹥k 7 , after estimation, the ...

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Abstract

The invention discloses a method and a system used for detecting pipeline sediment distribution and a computer storage medium. The method comprises steps that when an incident wave is excited, a pressure value of fluid of a detection point disposed in a pipeline is acquired in a preset time; a mapping relation between a time point and the pressure value is generated according to the acquired pressure value; according to the mapping relation, the arrival time and the strength of the incident wave, arrival time and strength of a pressurization wave reflected to the detection point, and arrival time of decompression wave reflected to the detection point are acquired; according to the arrival time of the incident wave and the arrival time of the supercharge wave, a distance between the sediment and the detection point is determined; according to the arrival time of the pressurization wave and the arrival time of the decompression wave, the length of the sediment is determined; according to the strength of the incident wave, the strength of the pressurization wave, and the distance between the sediment and the detection point, an obstructive coefficient range is determined; the sediment distribution condition is determined according to the distance between the sediment and the detection point, the length of the sediment, and the obstructive coefficient.

Description

technical field [0001] The invention relates to the field of pipeline detection, in particular to a method, system and computer storage medium for detecting distribution of pipeline deposits. Background technique [0002] When a complex fluid composed of various mixtures flows in a pipeline, the fluid will be affected by conditions such as temperature and pressure, and deposits will easily form on the inner wall of the pipeline. Deposits may cause scaling on the pipe wall, and may even cause accidents such as sediment blockage and condensation in the pipe, which will adversely affect and harm pipeline transportation. [0003] In order to avoid accidents such as sediment blockage and condensation pipes, it is necessary to regularly remove the sediment in the pipeline, and before cleaning the sediment, it is necessary to know the position of the sediment in the pipeline and the thickness of the sediment layer. [0004] In the prior art, there is a method for detecting pipelin...

Claims

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Application Information

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IPC IPC(8): G01V1/133
CPCG01V1/133
Inventor 张劲军张超马晨波刘稳文
Owner CHINA UNIV OF PETROLEUM (BEIJING)