Fuel gas direct-buried pipeline leakage point positioning method based on two-point optimizing tracing

A leakage point and pipeline technology, which is applied in the field of locating the leakage point of directly buried gas pipelines, can solve the problems of large manpower and material resources and economic losses, and achieve the effect of improving accuracy and reducing the number of soil drilling

Active Publication Date: 2019-07-23
HARBIN INST OF TECH
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that in the existing gas pipeline detection method, it is necessary to excavate the directly buried gas pipeline many times to find the leakage point, resulting in large manpower, material resources and economic losses. The method of directly burying the leakage point of the pipeline

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel gas direct-buried pipeline leakage point positioning method based on two-point optimizing tracing
  • Fuel gas direct-buried pipeline leakage point positioning method based on two-point optimizing tracing
  • Fuel gas direct-buried pipeline leakage point positioning method based on two-point optimizing tracing

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0032] Specific implementation mode 1: In this implementation mode, the specific process of locating the leakage point of the directly buried gas pipeline based on two-point optimization and traceability is as follows:

[0033] The invention adopts a new method combining interval qualitative and accurate positioning to realize the leakage positioning of directly buried gas pipelines.

[0034] First, calculate the maximum diffusion velocity of natural gas in different soils (sandy soil, loam, clay) according to the soil physical parameters, calculate and determine the maximum leakage radius of natural gas, and then based on the natural gas concentration monitored at any position in the soil, or any inspection well or The natural gas concentration is monitored in the inspection well, and then the two endpoints of the direct buried pipeline from the monitoring point to the possible leakage point of the natural gas pipeline are determined. This completes the first step, locating th...

specific Embodiment approach 2

[0042] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the maximum diffusion radius R in the step 1 is selected based on the following formula:

[0043] R=vt

[0044] Among them, t is the diffusion time from the leakage source to the monitoring point (estimated value, calculated as 24 hours a day and night); v is the diffusion speed of the leaked natural gas in the soil.

[0045] Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the step two, the target pipelines that may leak may be obtained in the step one are screened to determine the leaking pipeline; the specific process is:

[0047] First, prioritize the target pipelines that may leak in the circle, based on the distance from the alarm inspection well or alarm monitoring point, and sort the distance from small to large, and the order is: i, i+1,..., I ; The target pipeline with a small distance from the monitoring point is given priority to drilling and excavation; the closer to the monitoring point, the target pipeline that may leak is more likely to leak, and the priority is to carry out drilling and excavation;

[0048] First, drill a hole on the ground above the target pipeline i, and use a portable natural gas concentration sensor to monitor the natural gas concentration at the drill hole;

[0049] If the concentration of nat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a fuel gas direct-buried pipeline leakage point positioning method based on two-point optimizing tracing, relates to a fuel gas direct-buried pipeline leakage point positioningmethod and aims to solve the problems that through existing fuel gas pipeline detecting methods, excavation needs to be repeatedly performed on a direct-buried fuel gas pipeline for looking for leakage points, and consequently high manpower and material resources and large economic losses are caused. The process of the fuel gas direct-buried pipeline leakage two-point optimizing tracing positioning method includes the steps that (1) target pipelines which possibly have leakages are determined; (2) the target pipelines which possibly have leakages are screened, and the leakage pipelines are determined; (3) hole drilling and excavation are performed on the ground above the leakage pipelines in sequence through a two-point method; (4) a concentration diffusion mathematical model of leakage of the leakage pipelines is established, and solving is performed; and (5) gradual two-point optimizing is performed on the leakage pipelines for positioning leakage points. The fuel gas direct-buriedpipeline leakage point positioning method based on two-point optimizing tracing is used for the field of fuel gas direct-buried pipeline leakage point positioning.

Description

technical field [0001] The invention relates to a method for locating the leakage point of a directly buried gas pipeline. Background technique [0002] Urban direct buried gas pipeline is the lifeline of the city and plays an important role in the national economy and industrial production. With the continuous expansion of city size and population growth, the demand for natural gas in cities and towns is increasing, and the scale of natural gas pipelines is also expanding, and the urban buried pipeline network is becoming more and more dense. However, during the operation of natural gas pipelines, factors such as natural aging, corrosion or man-made damage inevitably exist, resulting in leakage accidents from time to time. Since urban natural gas pipelines are mainly laid in densely populated areas and the surrounding environment is relatively complex, once leakage occurs, Accidents such as fire and explosion will cause serious casualties and property losses. According to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F17D5/02
CPCF17D5/02
Inventor 谭羽非王雪梅肖榕
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap