Judicial Police Officer School Thermal Pipe Network Missing Point Positioning Monitoring System Engineering

Engineering

1. Project Name: Judicial Police Officer School Thermal Pipe Network Missing Point Positioning Monitoring System Project.

2. Project location: The road to the north side of the Judicial Police School.

3. Project content: Construction of the 1.2 km thermal pipe network leak point location monitoring system.

Engineering solution

1. Project background

A heat pipe is a pipe that transports a heat energy medium such as steam or superheated water. After years of urban transformation, the heat pipes of large and medium-sized cities are mostly laid underground, including pipe trenching and direct burial. The heat pipe will be subjected to high temperature, wear, physics and chemistry during use. In addition to the surrounding underground engineering construction and ground traffic dynamic load disturbance, the heat pipe will gradually produce defects such as cracks, deformation and joint damage, and then evolve into fractures. Water leaks and other accidents. If there is a large amount of water leakage or even a break in the pipeline during heating, the heat supply medium has high temperature, high pressure and fast flow rate, which makes the rescue difficult, and the hot water is harmful to other underground public facilities. The loss is difficult to estimate. .

The techniques and methods applied to pipeline engineering monitoring at home and abroad are developing from traditional point instrument monitoring to distributed, automated, high precision and remote monitoring. Distributed optical fiber sensing technology is a new type of real-time online monitoring technology. The detection cable is laid in parallel along the thermal pipeline, which can realize real-time monitoring of abnormal conditions such as vibration, leakage and hot spots along the pipeline. It has a long measuring distance and continuous distribution. It has the advantages of measurement, precise positioning, simple installation, safety and reliability, and strong expansion. It will not cause any damage to the buried pipeline or affect its normal production. It can identify the stable and newly occurring leaks, especially for heat. Pipeline online monitoring application.

Based on the industry's most advanced distributed optical fiber sensing technology, the temperature-sensitive optical cable and the vibrating optical cable are laid along the thermal pipeline line type, and the temperature distribution and vibration around the pipeline are monitored in real time. When the temperature of the thermal pipeline is abnormal or occurs near the thermal pipeline. The distributed optical fiber sensing monitoring system can capture these abnormalities in time and damage the temperature curve or vibration signal, and locate the location information of the abnormal points, which is convenient for pipeline maintenance personnel to timely repair and deal with. To avoid major accidents. Monitoring objectives include:

Ø Real-time online temperature distributed monitoring;

Ø Vibration monitoring near the pipeline in real time;

Ø Clearly indicate the location information of hot spots or pipeline anomalies;

Ø Provide early detection of pipeline anomalies;

Ø Manually excavating thermal pipeline safety protection;

Ø Mechanical excavation of thermal pipeline safety protection;

Ø Vertical and horizontal mechanical drilling thermal pipeline safety protection.

When the wall thickness of the pipe of the heating pipe is thin, the joint is broken or the insulation layer is damaged, the temperature of the local pipe section is abnormal, and the temperature measuring fiber sensor can capture these abnormalities in time and display it on the temperature distribution curve. Through the intelligent alarm algorithm and graphical professional analysis software, the position and temperature deviation of the abnormal point can be analyzed and extracted to realize the alarm function.