The utility model belongs to the technical field of double back pressure double process condenser, and specifically relates to a bottom supporting rod of a double back pressure double process condenser. The utility model comprises a upper screw, a lower screw and a supporting tube, the upper screw is a left-hand screw, the lower screw is a right-hand screw, and the two screws are connected through the support tube. The utility model can adjust the support rod at the bottom of the condenser to the length to adjust the support rod, and the improved support rod is adjusted by the thread structure with excellent self locking performance, and the gap between the support and the supported surface can be completely eliminated during the installation of the support rod, and it is flexible and self locking in the process of installation and disassembly. The utility model has the advantages of good performance and high efficiency, and meets the requirements of on-site installation, disassembly, operation convenience, simplicity and reliability, and effectively shortens the period of water leakage and leak detection during the overhaul period.
【技术实现步骤摘要】
一种双背压双流程凝汽器底部支撑杆
本技术属于双背压双流程凝汽器
,具体涉及一种双背压双流程凝汽器底部支撑杆。
技术介绍
田湾核电站凝汽器的型号为1000-КП-83000-1,一台机组有4台凝汽器,属于表面式热交换器,为了补偿热膨胀产生的差异,凝汽器本体安装在弹簧支撑上,每台凝汽器底部设有4组弹簧支撑。大修时凝汽器传热管充水查漏期间,需向汽侧注入除盐水,从凝汽器底部计算,除盐水充注高度为9.0m,总重量约3500T。由于正常运行工况下,凝汽器汽侧的液位为0.6m左右,如对凝汽器汽侧注水至9.0m,其载荷已大大超出设计范围,必须对凝汽器实施加固。加固从两个方面进行,凝汽器底板的支撑和弹簧支撑的闭锁。凝汽器底板的支撑:凝汽器为矩形容器,底部为平板结构,刚度较差,在承受较大载荷时容易变形。因此,在注水前必须加装临时支撑,以防止设备损坏。具体方法为:在每台凝汽器底部中间位置加一组支撑,支撑由4根ф159×6mm的钢管焊接而成,支撑顶部与凝汽器底部之间用楔子塞紧。弹簧支撑的闭锁:每个凝汽器底部有4根立柱,每个立柱上有1组弹簧支撑,为了防止凝汽器注水后由于载荷过大造成弹簧过度压缩而拉伤低压缸喉部,在注水前必须对弹簧进行闭锁。具体方法为:在每组弹簧支座上安装10根DN50的钢管作为刚性支撑杆,这样凝汽器的载荷通过钢管直接作用在基础上,避免了弹簧的过度压缩。现有技术中,在进行弹簧支撑闭锁安装支撑杆时,对于刚性支撑杆与被支撑面之间的间隙需要填塞薄钢板来消除,而在拆除支撑杆时,由于凝汽器汽侧留有约400T重的除盐水,需要使用工具将支撑杆逐个敲下,导致支撑杆的安装和拆卸十 ...
【技术保护点】
1.一种双背压双流程凝汽器底部支撑杆,包括上螺杆(1)、下螺杆(5)和支撑管(2),其特征在于:上螺杆(1)为左旋螺杆,下螺杆(5)为右旋螺杆,两根螺杆通过支撑管(2)传动连接;上螺杆(1)下端和下螺杆(5)上端均设有外螺纹,支撑管(2)上端和下端均设有内螺纹,支撑管(2)内螺纹与上螺杆(1)外螺纹、下螺杆(5)外螺纹相匹配,上螺杆(1)外螺纹、下螺杆(5)外螺纹、支撑管(2)内螺纹为梯形螺纹。
【技术特征摘要】
1.一种双背压双流程凝汽器底部支撑杆,包括上螺杆(1)、下螺杆(5)和支撑管(2),其特征在于:上螺杆(1)为左旋螺杆,下螺杆(5)为右旋螺杆,两根螺杆通过支撑管(2)传动连接;上螺杆(1)下端和下螺杆(5)上端均设有外螺纹,支撑管(2)上端和下端均设有内螺纹,支撑管(2)内螺纹与上螺杆(1)外螺纹、下螺杆(5)外螺纹相匹配,上螺杆(1)外螺纹、下螺杆(5)外螺纹、支撑管(2)内螺纹为梯形螺纹。2.根据权利要求1所述的一种双背压双流程凝汽器底部支撑杆,其特征在于:上螺杆(1)下端和下螺杆(5)上端分别设有止退螺钉(4)。3.根据权利要求1或2所述的一种双背压双流程凝汽器底部支撑杆,其特征在于:上螺杆...
【专利技术属性】
技术研发人员:严巍峰,卜俊,吴军,张晓蒙,
申请(专利权)人:江苏核电有限公司,
类型:新型
国别省市:江苏,32
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