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Spherical inner detector and positioning system for pipeline leakage detection

An internal detector and pipeline leakage technology, which is applied in the field of pipeline leakage detection systems, can solve the problems of insufficient detection sensitivity, inaccurate positioning, and increased on-site excavation and maintenance costs.

Pending Publication Date: 2022-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still two problems in the spherical inner detector used in the leakage detection of urban water supply and drainage pipelines: First, the detection sensitivity is not high enough to meet the needs of small leak detection
The second is the inaccurate positioning of the leakage point, including the inaccurate positioning of the pipe network interval, the inaccurate axial positioning of a single pipeline, and the inaccurate positioning of the circumferential angular position of a certain section, which increases the cost of on-site excavation and maintenance.

Method used

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  • Spherical inner detector and positioning system for pipeline leakage detection
  • Spherical inner detector and positioning system for pipeline leakage detection
  • Spherical inner detector and positioning system for pipeline leakage detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Spherical inner detector design and component layout method

[0047] figure 1 Middle 1 is the watertight spherical shell of the spherical inner detector, which is made of 3D-printed resin or nylon hemispherical shells butted with grooves and glued and formed by UV. There are several square holes 4 symmetrically distributed at a certain distance from the equatorial plane of the watertight spherical shell, which are used to place counterweight metal blocks 5, and the material of the counterweight metal blocks can be copper, steel, tungsten, lead, etc. The purpose of placing the metal block is to counterweight the spherical inner detector, so that the average density of the entire spherical inner detector is greater than the density of water, and it can sink to the bottom of the pipe during the rolling process; the second is to improve the surrounding area of ​​the spherical inner detector. The moment of inertia in the normal direction of the equatorial plane makes the...

Embodiment 2

[0060] Such as Figure 10 , Watertight spherical shell two 3 Change the square hole on the watertight spherical shell of embodiment one into an annular groove 20, change the counterweight metal block into a metal ring 21, and form a complete watertight spherical shell after the metal ring and the watertight spherical shell are assembled. Other structures and leak detection and location methods remain unchanged from the first embodiment.

Embodiment 3

[0062] Such as Figure 11 1. The watertight spherical shell of watertight spherical shell 3 18 designs the square hole 19 near the equatorial plane inside the spherical wall, and realizes that the spherical inner detector rolls on a fixed axis in the pipeline by placing a metal block inside. The assembly method of the two hemispherical shells is replaced by placing a rubber O-ring in the O-ring groove 14 on the hemispherical boss 13 for assembly. Although the internal air ball cavity 22 of this structure is not a complete spherical cavity, it does not have a great impact on the sensitivity. Other structures and leak detection and location methods remain unchanged from Example 1.

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Abstract

The invention relates to a spherical inner detector for pipeline leakage detection and positioning. The spherical inner detector comprises a watertight spherical shell, at least two microphones, a microphone support (7), a functional circuit board, a power module (11) and a signal transmitting device. Wherein the interior of the watertight spherical shell is an air spherical cavity (2), and a counterweight is arranged on the equatorial plane of the watertight spherical shell or near the equatorial plane, so that the contact point of the spherical inner detector and the inner wall of the pipeline is located on the equatorial plane after the spherical inner detector rolls and is static in the pipeline; one microphone is located at or close to the center of the equator of the watertight spherical shell and is called as a center microphone, and the other microphones are located at or close to the equator of the watertight spherical shell; the microphone support (7) is used for fixing a microphone; the functional circuit board comprises a main MCU, a data acquisition module, a wireless transmission module, an accelerometer and a magnetometer; and the signal transmitting device comprises a transmitting piezoelectric ceramic sensor (12) and a signal generating and driving circuit. The invention also provides a pipeline leakage detecting and positioning system using the detector.

Description

technical field [0001] The invention relates to a pipeline leakage detection system. Background technique [0002] As one of the largest pipe network systems in the city, water pipes are spread all over the city. The stability of its water supply and drainage is also an important guarantee to meet the quality of life of citizens. With the widespread use of pipelines, on the one hand, the number of pipelines is increasing year by year, on the other hand, the pipelines are aging and corroded seriously, and leakage accidents occur from time to time. Once the pipeline leaks, it will cause serious environmental pollution, economic loss and casualties. Therefore, it is very necessary to detect pipeline leaks, especially to detect and locate early small leaks. [0003] Acoustic leak detection method is currently the most widely used method for pipeline leak detection. In the early days, people used negative pressure waves caused by sudden large leaks to detect and locate leaks....

Claims

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Application Information

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IPC IPC(8): F17D5/02F16L55/28F16L55/40F16L101/30
CPCF17D5/02F16L55/28F16L55/40F16L2101/30
Inventor 黄新敬王亮李赞李健封皓陈世利芮小博
Owner TIANJIN UNIV