CN-122015025-A - Leakage monitoring and early warning method and device for plastic water supply pipeline based on resistance and capacitance

CN122015025ACN 122015025 ACN122015025 ACN 122015025ACN-122015025-A

Abstract

The invention relates to a leakage monitoring and early warning method and device for a plastic water supply pipeline based on a resistor and a capacitor, and belongs to the technical field of leakage monitoring of water supply pipelines. The method comprises the steps of forming two parallel conductive plastic fusion bodies extending along the length of a pipeline on the surface of a plastic pipeline body through a forming process, arranging a resistance-capacitance detection terminal on the pipeline at intervals, arranging three electrodes which are respectively electrically connected with the two independent conductive plastic fusion bodies at the position, connecting a grounding electrode with the ground, detecting the capacitance and resistance change conditions between the two conductive plastic fusion bodies and between each conductive plastic fusion body and the ground in real time, setting a capacitance early warning threshold and a resistance early warning threshold, judging that the pipeline is leaked when one capacitance increment exceeds the early warning threshold and one resistance reduction exceeds the early warning threshold, and triggering an alarm. The invention solves the problems of high omission ratio, high cost, poor stability and the like in the prior art and provides a high-efficiency solution for the leakage control of the water supply network.

Inventors

SUN QIYU
LI HEYING
Chi Hongyang
GONG JINGHAO
WANG JIE

Assignees

山东锋士信息技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260202

Claims (7)

1. The leakage monitoring and early warning method for the plastic water supply pipeline based on the resistance and the capacitance is characterized by comprising the following steps: (1) Forming two parallel conductive plastic fusion bodies extending along the length of the pipeline on the surface of the plastic pipeline body through a forming process; (2) A resistance and capacitance detection terminal is arranged on the pipeline at intervals, three electrodes are arranged on the resistance and capacitance detection terminal and are respectively and electrically connected with two independent conductive plastic fusion bodies at the position, and a grounding electrode is connected with the ground and is used for detecting the capacitance and resistance change conditions between the two conductive plastic fusion bodies and between each conductive plastic fusion body and the ground in real time; (3) After the pipeline is installed and laid, under the condition of no leakage and no rainfall interference, each resistance and capacitance detection terminal records an initial capacitance reference value C 0 and an initial resistance reference value R 0 between two conductive plastic fusion bodies, an initial capacitance reference value C 1 、C 2 and an initial resistance reference value R 1 、R 2 between each conductive plastic fusion body and a grounding electrode; (4) The resistance capacitance detection terminal collects capacitance data between conductive plastic fusion bodies in real time And resistance data And capacitance data between each conductive plastic fusion and the ground electrode 、 And resistance data 、 And setting a capacitance early warning threshold delta C 0 、ΔC 1 、ΔC 2 and a resistance early warning threshold delta R 0 、ΔR 1 、ΔR 2 , wherein when the real-time capacitance is continuously increased and the real-time resistance is continuously reduced, one capacitance increase exceeds the early warning threshold, and one resistance decrease exceeds the early warning threshold, the leakage early warning information and the approximate position of the pipeline are judged to be triggered by leakage of the pipeline and sent to a remote monitoring platform through a wireless communication module.
2. The leakage monitoring and early warning method for the plastic water supply pipeline based on the resistance and the capacitance according to claim 1, wherein the conductive plastic fusion bodies in the step (1) are uniformly distributed along the periphery of the pipeline, and the interval is 1/2 of the circumference of the pipeline body.
3. The leakage monitoring and early warning method for the plastic water supply pipeline based on the resistor and the capacitor, which is disclosed in claim 1, is characterized in that the conductive plastic fusion body in the step (1) is made of conductive plastic.
4. The leakage monitoring and early warning method for the plastic water supply pipeline based on the resistance and the capacitance is characterized in that a capacitance detection terminal is arranged every 200-400 meters in the step (2).
5. The leakage monitoring and early warning method for the plastic water supply pipeline based on the resistance and the capacitance according to claim 1 is characterized in that when leakage occurs in the step (4), the water content of soil around the leakage point is increased, the dielectric constant of the soil is increased, the capacity of a capacitor formed between two conductive plastic fusion bodies is increased, the resistance is reduced, and meanwhile, the capacitance between each fusion body and a grounding electrode is increased, and the resistance is reduced.
6. The leakage monitoring and early warning equipment for the plastic water supply pipeline based on the resistance and the capacitance is characterized by comprising a plastic pipeline with a conductive plastic fusion body, a resistance and capacitance detection terminal and a remote control platform; the plastic pipeline with the conductive plastic fusion body is characterized in that two parallel conductive plastic fusion bodies extending along the length of the pipeline are formed on the surface of a plastic pipeline body through a forming process; The resistance-capacitance detection terminal comprises a resistance-capacitance detection module, a data processing module, an alarm module and a wireless communication module, wherein the resistance-capacitance detection module is provided with three electrodes which are respectively and electrically connected with two independent conductive plastic fusion bodies, and a grounding electrode is connected with the ground and used for detecting capacitance and insulation resistance between the two conductive plastic fusion bodies and the ground in real time; the data processing module is used for recording an initial capacitance reference value C 0 and an initial resistance reference value R 0 between the two conductive plastic fusion bodies under the condition of no leakage and no rainfall interference, comparing the real-time capacitance with the initial capacitance reference value and the real-time resistance with the initial resistance reference value, setting a capacitance early warning threshold value delta C 0 、ΔC 1 、ΔC 2 and a resistance early warning threshold value delta R 0 、ΔR 1 、ΔR 2 , judging that a pipeline leaks when one capacitance increment exceeds the early warning threshold value and one resistance increment exceeds the early warning threshold value, triggering an alarm module to alarm, and pushing leakage early warning information and approximate positions to a remote monitoring platform through the wireless communication module so as to realize real-time leakage early warning; and the remote control platform receives the early warning information and the position of each capacitance monitoring terminal to carry out visual display and alarm.
7. The leakage monitoring and early warning device for plastic water supply pipelines based on resistance and capacitance according to claim 6, wherein the resistance and capacitance detection terminals are arranged on the pipelines at intervals.

Description

Leakage monitoring and early warning method and device for plastic water supply pipeline based on resistance and capacitance Technical Field The invention relates to a leakage monitoring and early warning method and device for a plastic water supply pipeline based on a resistor and a capacitor, and belongs to the technical field of leakage monitoring of water supply pipelines. Background According to the data of "urban and rural construction statistics annual survey" issued by the living construction department 2022, 10 months (2021), the total amount of public water supply in the urban and county areas of the country in 2021 is 742.16 hundred million cubic meters, the leakage water quantity is 94.08 hundred million cubic meters, and the comprehensive leakage rate is 12.68%.2017 The second water supply peak forum meeting data statistics shows that the average pipe network leakage rate of 654 cities in the whole country exceeds 15%, rural areas are more serious, and the average level of the total basic leakage assessment index of the current country is 12% and the average level of 6-8% of developed countries is still a larger gap. The occupation of water resources of people in China is only 35% of the average world level, in northern water-deficient cities, water supply sources mostly depend on cross-regional water regulation or underground water, and pipe network leakage causes not only waste of a large amount of water resources, but also large economic loss to enterprises, and high-efficiency treatment is urgently needed. The water supply main pipe is buried underground by 0.7-2 m in depth in consideration of anti-freezing and anti-damage factors, and inspection is difficult to find when leakage occurs. At present, the conventional leakage detection method is a leakage detection method, the characteristics that the pipeline shakes and is transmitted to the ground are utilized, when the environmental noise is small in the early morning, workers of a leakage detection team are arranged to monitor the noise of the ground above the pipeline by using the leakage detection instrument, and whether a water leakage point exists is judged empirically according to the characteristics of noise intensity, frequency and the like. The method for intelligently detecting leakage is a DMA partition metering analysis method and a leakage noise monitoring method, wherein the DMA partition metering analysis method calculates leakage rate by means of the difference between inflow water flow, water consumption and outflow water flow of the partition, the leakage noise monitoring method uses software to analyze noise characteristics to find leakage points after collecting noise uploading by means of equipment, and a large number of products such as flow meters, water meters and leakage noise monitors are required to be installed and distributed, so that the problems of large investment, high failure rate and difficult maintenance exist. Disclosure of Invention The invention aims to overcome the defects and provide a leakage monitoring and early warning method for a plastic water supply pipeline based on resistance and capacitance, which is characterized in that an independent conductive fusion body is designed in the pipeline, the real-time leakage early warning is realized by utilizing the correlation characteristic of the dielectric constant and the water content of soil and combining the capacitance and resistance change, the problems of high leakage detection rate, high cost, untimely property, poor stability and the like in the prior art are solved, and an efficient solution is provided for the leakage management of the water supply pipeline network. The technical scheme adopted by the invention is as follows: a leakage monitoring and early warning method for a plastic water supply pipeline based on resistance and capacitance comprises the following steps: (1) Forming two parallel conductive plastic fusion bodies extending along the length of the pipeline on the surface of the plastic pipeline body through a forming process; (2) A resistance and capacitance detection terminal is arranged on the pipeline at intervals, three electrodes are arranged on the resistance and capacitance detection terminal and are respectively and electrically connected with two independent conductive plastic fusion bodies at the position, and a grounding electrode is connected with the ground and is used for detecting the capacitance and resistance change conditions between the two conductive plastic fusion bodies and between each conductive plastic fusion body and the ground in real time; (3) After the pipeline is installed and laid, under the condition of no leakage and no rainfall interference, each resistance and capacitance detection terminal records an initial capacitance reference value C 0 and an initial resistance reference value R 0 between two conductive plastic fusion bodies, an initial capacitance reference value C 1、C2 and an initial