Drain pipe sealing check valve capable of preventing pests

• Main Authors: WANG GUANGXING, ZHU XIN, ZHAO MINGXIA, ZHANG YINGWEI, KONG DEKUAN, HUANG QI
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; SEWERAGE; SINKS; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WATER SUPPLY; WEAPONS

The utility model provides a drain pipe sealing check valve capable of preventing pests, which solves the technical problem that viruses and pests are bred due to the fact that sewage cannot be completely discharged in a manner of isolating the pests by adopting a water seal in an existing drainage system, and can be widely applied to the field of building construction. The drainage device specifically comprises a drainage expansion joint, a non-return mechanism is arranged in the drainage expansion joint and comprises a fixed block, a hinge part, a movable cover plate and a reset spring, the fixed block is fixedly connected to the inner wall of the drainage expansion joint, the fixed block is rotationally connected with the movable cover plate through the hinge part, and the movable cover plate is rotationally connected with the reset spring through the hinge part. The reset spring is arranged on the movable cover plate, one end of the reset spring is fixedly connected to the movable cover plate, and the oth