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Online monitoring and ventilating linkage control method for gas cabin of comprehensive pipe gallery

A comprehensive pipe gallery and gas technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as inability to realize timely and safe monitoring and dynamic linkage ventilation, and inability to ensure economical and effective release

Active Publication Date: 2019-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The purpose of the present invention is to solve the problem that the technology of timely and safe monitoring and dynamic linkage ventilation cannot be realized when the gas leaks in the comprehensive pipe gallery in the existing project, and the problem that the explosion hazard cannot be guaranteed economically and effectively, and proposes a comprehensive pipe gallery On-line monitoring and ventilation linkage control method of gas cabin

Method used

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  • Online monitoring and ventilating linkage control method for gas cabin of comprehensive pipe gallery
  • Online monitoring and ventilating linkage control method for gas cabin of comprehensive pipe gallery
  • Online monitoring and ventilating linkage control method for gas cabin of comprehensive pipe gallery

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Effect test

specific Embodiment approach 1

[0053] Specific implementation mode 1: An online monitoring and ventilation linkage control method for a comprehensive pipe gallery gas cabin in this implementation mode is as follows:

[0054] Step 1. The natural gas concentration monitor monitors the natural gas concentration in the independent gas compartment of the comprehensive utility gallery in real time;

[0055] The pipeline pressure sensor monitors the natural gas pressure in the pipeline in real time;

[0056] Determine whether the detected signal corresponds to the "no leak", "minor leak" or "hazardous leak" category,

[0057] If the volume fraction of the gas leakage concentration measured at the measuring point in the gas independent cabin of the integrated pipeline gallery is c<1%, it belongs to the category of "no leakage";

[0058] If the volume fraction of the gas leakage concentration measured at the measuring point in the gas independent cabin of the integrated pipeline gallery is 1%≤c≤5%, the pressure ins...

specific Embodiment approach 2

[0062] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the specific setting process of the natural gas concentration monitor in the step one is:

[0063] A fire compartment is set every 200m in the independent gas cabin, so the monitoring principle for natural gas leakage in the cabin is to quickly detect the leaked natural gas with the least number of monitors;

[0064] According to the operating pressure of the natural gas pipeline in the independent cabin of the integrated pipeline gallery (less than or equal to 1.6MP) and the most unfavorable small hole leakage condition (when the small hole is 0-6.35mm, the most unfavorable small hole leakage condition is 6.35mm), the numerical value is adopted The simulation method (using the pre-processing software ICEM in ANSYS to establish a physical model of natural gas leakage and diffusion in the comprehensive pipeline gallery and perform grid division, give the corresponding mathemati...

Embodiment approach

[0066] Implementation method: According to the operating parameters of the gas cabin pipeline, use numerical simulation methods to simulate the concentration field distribution of natural gas leakage under the most unfavorable working conditions, and arrange natural gas concentration monitors in sequence along the maximum step change point of the concentration field distribution contour line , and then orthogonalize the monitors at different positions, filter out the monitors whose monitoring information is linearly correlated, and transmit the signals of all online monitors wirelessly to the integrated detection module.

[0067] Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to an online monitoring and ventilating linkage control method for a gas cabin of a comprehensive pipe gallery. The online monitoring and ventilating linkage control method aimsat solving the technical problem that in existing engineering, when gas in the comprehensive pipe gallery leaks, timely and safe monitoring and dynamic linkage ventilation cannot be achieved and the problem that the explosion danger cannot be relieved economically and effectively. The online monitoring and ventilating linkage control method comprises the steps that firstly, whether monitored signals correspond to the 'no-leakage' type, or the 'tiny leakage' type or the 'dangerous leakage' type is determined; secondly, distribution boundaries of 'no-leakage', 'tiny leakage' and 'dangerous leakage' in the plane are calculated, and thus corresponding areas of the 'no-leakage', 'tiny leakage' and 'dangerous leakage' in the plane are obtained; and thirdly, a controller transmits signals of thecorresponding area and the corresponding type to an actuator, and the actuator determines the number of variable-frequency ventilation times according to the signals. The online monitoring and ventilating linkage control method is used for the field of gas monitoring of the comprehensive pipe galleries.

Description

technical field [0001] The invention belongs to the technical field of public safety, and in particular relates to a method and system for safely treating gas pipeline leakage in a closed small space of a comprehensive utility gallery. Background technique [0002] Since 2013, after the State Council successively issued guidance on the construction of comprehensive pipe corridors, the country has successively started the pilot construction of comprehensive pipe corridors. The development of urban underground comprehensive pipeline corridors can efficiently utilize underground space, and at the same time provide sufficient operation and maintenance space for pipeline operation and maintenance, and fundamentally avoid the occurrence of road zipper phenomenon. [0003] In the comprehensive pipe gallery, various pipelines are generally laid at the same time, including electricity, communication, heating, gas, sewage pipes, etc. However, because the gas pipeline is a high-risk p...

Claims

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Application Information

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IPC IPC(8): F17D5/02F17D5/00
CPCF17D5/005F17D5/02
Inventor 谭羽非王雪梅于克成张金冬
Owner HARBIN INST OF TECH
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