Steam generator small connecting pipe foreign matter prevention tool

• Main Authors: CHANG HONGBIN, DONG BAOZE, BAI YUDONG, LU JING, TAO WEIMING, JIN FEI, ZHAO WENBING, GUO KEKE, GAO ZHEN, ZHAO DEHUAN
• Format: Patent
• Language: Chinese; English
• Published: 03.04.2020
• Subjects: HAND TOOLS; MANIPULATORS; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING; TRANSPORTING

The utility model belongs to the technical field of nuclear power station steam generator maintenance. The foreign matter prevention tool for the small connecting pipe of the steam generator is provided. The device comprises a pressure plate assembly, a locking assembly and a sealing assembly, the pressure disc assembly comprises a limiting pressure disc, a middle pressure disc and a threaded pressure disc which are sequentially arranged, the sealing assembly is distributed between the limiting pressure disc and the middle pressure disc and between the middle pressure disc and the threaded pressure disc, and the locking assembly achieves compression and release of the sealing assembly by adjusting the distance between the pressure discs. The small connecting pipe of the steam generator canbe quickly plugged and dismounted, the operation time of personnel is reduced by about 60%, and the dosage received by the personnel is reduced. And meanwhile, the falling risk after plugging is eliminated, economic losses c