The comprehensive pipe gallery is a structure and its ancillary facilities set up below the ground to accommodate two or more types of municipal pipelines, equipped with specialized maintenance ports, lifting ports, and monitoring systems. It implements unified planning, design, construction, and management, and is currently one of the important forms of urban underground space development.
Urban utility tunnel belongs to the municipal public facilities of the city, which is the basis for ensuring the good operation of the city. At the same time, the construction of the utility tunnel has a certain degree of Irreversible process, so the effect of the implementation of the utility tunnel directly affects the development of the city. Therefore, the early planning, design and construction of the utility tunnel, as well as the later operation and maintenance of the utility tunnel should be carefully studied, especially on the basis of planning in the design phase, Fully consider the operation of the comprehensive pipe gallery throughout its entire life cycle, and use design techniques correctly to truly serve as the lifeline of the city.
In the distribution system of the comprehensive pipe gallery, the system wiring plan, power supply voltage, power supply points, number of power supply circuits, capacity, etc. are determined based on the construction scale of the comprehensive pipe gallery, the surrounding power supply situation, the operation mode of the comprehensive pipe gallery, and after technical and economic comparison.
The comprehensive pipeline gallery requires fire protection equipment, monitoring and alarm equipment, emergency lighting equipment, and other secondary load equipment such as monitoring and alarm equipment, pipeline emergency switching valves, and accident fans to be installed in the natural gas pipeline compartment. Due to the special environmental characteristics of urban underground comprehensive pipe galleries, it is required that the protection level of electrical equipment inside the pipe gallery should not be lower than IP54, and explosion-proof equipment should be installed in the natural gas pipeline compartment. Regarding the special environment of pipe gallery application, Shenyang Svo has established some recommended electrical application solutions based on the relevant electrical specifications of urban comprehensive pipe galleries to address the electrical equipment used in pipe galleries:
In this system, the first end of the distribution box adopts the SIWOQ1 series automatic transfer switch product, and the S1 controller also has the function of self switching and self resetting. During the switch application process, it real-time monitors the voltage, current, phase, and working status detection of the two power supplies.
The SIWOF series electrical fire monitoring system is applied in low-voltage distribution systems to comprehensively monitor and control the lighting and power distribution of pipeline equipment, as well as electrical circuits that may experience fires. Timely alarm and prompt management personnel to eliminate electrical fire hazards. This system consists of electrical fire monitoring equipment, residual current type and temperature measuring electrical fire monitoring detectors, and residual current detectors. The product adopts advanced residual current detection technology and overcurrent inverse time limit alarm technology, achieving continuous adjustable and real-time tracking of its alarm value, thereby improving the accuracy of electrical fire alarm.
