Shenyang Expressway Tunnel Fire Protection System Electric Heating Belt Antifreeze and Insulation Project
Shenyang Hunnan Avenue Expressway Tunnel
The standard section of the Shenyang Hunnan Avenue Expressway Tunnel is 27.5 meters wide, and the widened section is 48 meters wide. It is the widest urban expressway tunnel in Northeast China. Together with the Changqing Street Expressway and the Shengli Street Expressway, it has initially formed an expressway network system, which is conducive to supporting the outward flow of urban functions, opening up the urban pattern, effectively alleviating traffic congestion in the central area, and at the same time strengthening the transportation connections between the peripheral new cities and the central area. , it is of great significance to realize the southward transfer of the city’s second ring function.
In the standard section, the width of a one-way single-hole tunnel can reach 12.25 meters, and the width of a single lane can reach 3.5 meters; while the width of a general one-way, single-hole, three-lane tunnel is about 11.5 meters, and the width of a single lane is 3.15-3.2 meters. For the decoration project in the tunnel, all the equipment selected are from well-known first-line brands at home and abroad. Anhui Huanrui undertook the design, supply, commissioning and operation of the tunnel fire pipeline electric heating cable project in this project.
Project application background
The project is located in the Northeast region, where extreme low temperatures in winter can reach -30.6°C and the average temperature is around -10°C. Therefore, it is necessary to antifreeze the water in the fire pipes in the highway tunnel that have been relatively static for a long time to prevent The fire-fighting system will be paralyzed due to freezing blockage, which may lead to safety hazards due to the inability to use it in special circumstances.
Anhui Huanrui Tunnel Fire Pipe Electric Heating System
Anhui Huanrui Tunnel Fire Pipe Electric Heating Cable System (the product used in this project is a series constant power electric heating belt). The electric heating belt is directly laid or wound and applied closely to the surface of the fire pipe to supplement the heat loss. Along its own length The range adjusts the water temperature at each control point of the pipeline system to maintain the water temperature within the required temperature range, thereby achieving the purpose of preventing pipeline freezing. The tunnel fire pipeline electric heating system consists of electric heating tape, power supply system, accessory system, control and detection system, etc. During operation, the heating system can be monitored and tested in a timely manner to facilitate users to turn on and off the system in time.
Working principle of series constant power electric heating cable
The series constant power electric heating tape is an electric heating product with a core wire heating element. That is, when current passes through a core wire with a certain resistance, the core wire emits Joule heat due to the resistance per unit length of the core wire and the current passing through. It is equal throughout the length, and the heat generated everywhere is equal. It will not cause low power at the end as the length of use increases. It is suitable for heat tracing and insulation of long-distance pipelines and is powered by one power point.
At present, the electric heat tracing project has been delivered and has been running smoothly for more than a year. The operating effect and heat tracing efficiency have received good feedback from customers. In the future, Anhui Huanrui will continue to provide customers with reliable products and professional heat tracing services, promote the application of electric heat tracing systems in more fields, and allow users to truly feel the convenience of electric heat tracing, antifreeze and insulation systems.
