Title:
SIMPLE FLOW BLOCKING DEVICE AND METHOD FOR USING SAME, AND PIPE PROVIDED WITH DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/121033
Kind Code:
A1
Abstract:
A simple flow blocking device and a method for using same, and a pipe provided with the simple flow blocking device. The simple flow blocking device comprises a rubber sleeve (1); the rubber sleeve is provided with a through flowing channel (10); a lower pressure charging cavity (111) is provided in the rubber sleeve; the rubber sleeve at the position of the lower pressure charging cavity is a double-layer structure comprising an outer rubber layer (12) and an inner rubber layer (13); the cross-section of the rubber sleeve at the position of the lower pressure charging cavity is arc-shaped, and the rubber sleeve is of an integral structure; an inlet/outlet hole (14) is provided on the outer rubber layer, and the inlet/outlet hole is in communication with the lower pressure charging cavity. A rubber sleeve structure is used, a pressure charging cavity (11) is provided in the rubber sleeve, and the entire rubber sleeve is of an integral structure; compared with the prior art, there is no problem of sealing of the pressure charging cavity, the structure is simpler, and the mounting and use are convenient.
Inventors:
ZHOU CHAO (CN)
Application Number:
PCT/CN2020/133241
Publication Date:
June 24, 2021
Filing Date:
December 02, 2020
Export Citation:
Assignee:
WUHAN SHENGYU DRAINAGE SYSTEM CO LTD (CN)
International Classes:
F16K7/07; E03F3/04; E03F5/042
Foreign References:
| CN111075947A | 2020-04-28 | |||
| CN111022696A | 2020-04-17 | |||
| US3918674A | 1975-11-11 | |||
| DE19508129C2 | 1997-02-13 | |||
| CN110397151A | 2019-11-01 | |||
| CN107228206A | 2017-10-03 | |||
| US2982511A | 1961-05-02 | |||
| US20080083889A1 | 2008-04-10 | |||
| US4662598A | 1987-05-05 |
Attorney, Agent or Firm:
BEIJING ZHONGDA DEQUAN IP AGENCY CO., LTD. (CN)
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