Protective device and method suitable for drainage pipeline plugging air bag

• Main Authors: WANG SHANSHAN, SHAO SHUAI, LIN CHEN, LI MING, JIANG XIN, WANG YIKE, ZHANG QIFEI, XIAO LAN, CHEN SHUYU, CHENG HAO, ZHOU RUI, XU YAN, FU XINGWEI, MEI CHANGSONG, ZENG ZHAOCAI, LIU YU, ZHANG DIANHUA, WANG SHUANGXI, GUI HONG, XU FAN, YOON YOUNG-JIN, XIONG CHAOYANG, LI XIANHUA, ZENG ZEYI, YANG ZHENGZHANG, WAN RONG, LI TINGRONG, LI YONGGUANG, LI TIANZHI, ZHANG QIANWEN
• Format: Patent
• Language: Chinese; English
• Published: 27.09.2022
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

The protection device comprises an expansion ring and an elastic rubber ring arranged on the outer circumference of the expansion ring in a sleeving mode, the expansion ring is a circular ring with an axial opening, a sawtooth groove is formed in the inner surface of the end, located on the outer side, of the opening, and a pawl is hinged to the other end, located on the inner side, of the opening; a baffle is arranged at one end of the expansion ring and axially shields the expansion ring. By means of the structure, the baffle can prevent sharp foreign matter in upstream water from impacting and damaging the air bag, the service life of the air bag is prolonged, and the accident rate is reduced. By means of the principle that the pawls and the sawtooth grooves can only move in one direction, the expansion ring of the scroll structure can expand outwards after the blocking air bag is inflated and expanded, so that the elastic rubber ring is attached to the inner surface of the drainage pipeline, and the pipel