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经过8个月的紧张施工,石景山热电厂至车公庄供热干线,于九二年九月下旬进入全面运行阶段。 该干线全长21.5公里,管径分别为1200mm和1000mm,并装有内压式波纹管,金属硬密封蝶阀,逆止阀及复式拉杆。为克服今年热负荷低于设计、地势高差大等困难,保证按设计压力运行,在两座中继回水加压泵没有投入使用的情况下,热电厂网络泵的出口处加孔板控制供水压力。
After eight months of intense construction, the Shijingshan Thermal Power Plant reached the main heating line of Chegongzhuang and entered the phase of full operation in late September 1992. The trunk line has a total length of 21.5 kilometers, diameters of 1200 mm and 1000 mm, and is equipped with internal pressure bellows, metal hard seal butterfly valves, check valves and double tie rods. In order to overcome this year’s heat load lower than the design, terrain height difference and other difficulties, to ensure the operation according to the design pressure, in the case of two relay return water pump has not been put into use, the outlet of the thermal power plant network pump orifice control water supply pressure.