Shunde, the cultural hinterland of Guangfu in the Pearl River Delta, has developed economy since ancient times, humanities are prosperous, food culture has a long history, the world is famous, and has been awarded the "World Capital of Gastronomy" by UNESCO, and the rich and diverse Cantonese dishes of Shunde are endlessly evocative. At the Meida Avenue Station in Beijiao, Metro Line 7 creeps along the ground, and in the equipment room of the deep substation, a group of electrified people sweat like rain and use "Wudian Craftsmanship" to cook a "hard dish" for the Guangzhou subway.
Secondary wiring arrangement process (1)
Walking into the Midea Avenue Station, the machinery roared, and the sound of welding tools "whoosh, whoosh" was noisy into the ears, a hot scene. The workers carefully shuttled through it, turning their bodies from time to time, afraid that the tools in their hands would bump into the finished product. In the equipment room, the installed substation equipment is neatly wrapped in three shields.
Secondary wiring arrangement process (2)
According to Li Liang, chief engineer of the project, the substation is a traction step-down hybrid substation, which is affected by the progress of the project in front of the station, and there are more cross-construction of various professions, which increases the difficulty and risk of construction to a certain extent. In order to ensure the progress of construction, the project department actively coordinates and communicates with the participating units, sees the seams and inserts needles, optimizes the construction organization, ensures the professional construction order, and at the same time does a good job in the protection of finished products.
Secondary wiring arrangement process (3)
Unveiling the three shields, the neatly arranged cabinets on the clean and bright green insulated floor come into view, just like the square and majestic formation on the parade ground.
Li Liang said that the 1500 volt DC equipment adopts the overall insulation installation method, that is, the equipment support parts, cable holes and equipment foundation are integrated into an insulating whole, and the surface level is checked with a horizontal ruler during the installation of the insulation floor, and the level is used to review the level of the equipment support, to ensure that the overall level meets the error requirements of the equipment installation regulations is not more than 2 mm, and the insulation resistance test is carried out after the construction is completed. This integral insulation is installed in a beautiful way, with good insulation properties and a solid texture, which can withstand heavier equipment and has a long service life.
Secondary wiring arrangement process (4)
Open the distribution cabinet, the yellow power cord subdivided from the control cable is small and numerous, like "capillaries" "flowing" into each device end hole. The black lashing height of the fixed cable is consistent, horizontal and vertical; there is also a "U-shaped" reserved circle process that bends with the same arc, which is firmly imprisoned and not easy to fall off, accurately wired, exquisite to the extreme, and convenient for subsequent operation and maintenance. Li Liang introduced that this is the secondary wiring in the substation equipment, which mainly monitors, controls, measures and protects the equipment in the substation, and is one of the main processes of the substation construction.
Laminated cable laying process
Bending the body into the cable mezzanine, countless black cables are arranged in a flat arrangement to form a waterfall, merging with each other and layered, magnificent and deep.
Li Liang introduced, Substation mezzanine adjacent cable support hanger spacing horizontal laying is not more than 0.8 meters, vertical laying is not more than 1 meter, according to the design specifications using the corresponding type of anchor for fixed installation, through the grounding flat steel electrical penetration, where the cable is fixed at each support point, cable in and out of the equipment, turning, vertical laying and straight line section every 10 meters using non-ferromagnetic material rigid cable card fixed, the rest of each support point with cable cassette fixed, cable arrangement neatly orderly, clear and standardized, cable listing label clear.
1500v DC cabinet and insulated flooring process
One minute on stage, ten years offstage. The cable laying of the substation is completed by hand, from the cable laying to the listing, from the engineering quality to the detailed process, which is the ingenuity inheritance of the Wuhan Electrification Bureau of China Railway, focusing on the engineering process from an artistic perspective, and every place is a surprise.
At the construction site of Line 7, they have both the "ingenuity" of Shunde chefs and the "dare to fight" of electrified people, which will surely make the delicious taste of Shunde spread everywhere with the Mercedes-Benz subway. (Correspondent Shi Yongyong Ye Ding)