Title:
SEALING DEVICE HAVING POSITIVE AND NEGATIVE PRESSURE RESISTANT WATER SEAL PROTECTION FUNCTION
Document Type and Number:
WIPO Patent Application WO/2024/016868
Kind Code:
A1
Abstract:
A sealing device having a positive and negative pressure resistant water seal protection function. The sealing device comprises a sleeve body (1); an opening and closing valve plate (15) is rotatably connected to the lower end of the sleeve body (1); a negative pressure valve mechanism (27) is arranged at a side portion of the sleeve body (1); the negative pressure valve mechanism (27) comprises a groove body (2) and a multifunctional cover (29); the groove body (2) is of a bevel (7) structure; a pressure conduction film (20) is provided on the bevel (7) of the groove body (2) facing the inner side of the sleeve body (1); a pressure conduction body (3) corresponding to the pressure conduction film (20) is arranged in the groove body (2); a push rod (6) of the pressure conduction body (3) passes through the multifunctional cover (29) in a connection fit with the groove body (2); the push rod (6) works in conjunction with the opening and closing valve plate (15) by means of a locking mechanism (28); and the multifunctional cover (29) is provided with a gas pressure hole (4) communicated with a sewer line. The sealing device can prevent negative pressure from damaging water seal.
Inventors:
LIU YONG (CN)
JIANG CHENGXU (CN)
JIANG CHENGXU (CN)
Application Number:
PCT/CN2023/098460
Publication Date:
January 25, 2024
Filing Date:
June 06, 2023
Export Citation:
Assignee:
JIANG CHENGXU (CN)
International Classes:
E03C1/28; E03C1/294; E03C1/298
Foreign References:
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Attorney, Agent or Firm:
SHENYANG YATAI PATENT AND TRADEMARK AGENT CO., LTD. (CN)
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