US 11,905,834 B2
Shield sealing device and shield sealing method
Jian Chen, Shandong (CN); Shuchen Li, Shandong (CN); Bin Zhi, Shandong (CN); Chengzhen Wang, Shandong (CN); Penglin Li, Shandong (CN); and Hongjun Liu, Shandong (CN)
Assigned to CHINA RAILWAY 14TH BUREAU GROUP CO., LTD., Shandong (CN); and OCEAN UNIVERSITY OF CHINA, Shandong (CN)
Appl. No. 17/602,746
Filed by CHINA RAILWAY 14TH BUREAU GROUP CO., LTD., Shandong (CN); and OCEAN UNIVERSITY OF CHINA, Shandong (CN)
PCT Filed May 7, 2020, PCT No. PCT/CN2020/088937
§ 371(c)(1), (2) Date Oct. 9, 2021,
PCT Pub. No. WO2021/196339, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010239524.1 (CN), filed on Mar. 30, 2020.
Prior Publication US 2023/0037876 A1, Feb. 9, 2023
Int. Cl. E21D 9/14 (2006.01); E21D 9/06 (2006.01)
CPC E21D 9/0635 (2013.01) [E21D 9/14 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A shield sealing device,
a pile wall is arranged at a shield receiving opening, the shield sealing device is mounted on the pile wall, and the shield sealing device comprises:
an elastic inner ring, an inner wall of the elastic inner ring adapting to an outer wall of a cutter head of a shield tunneling machine; and
a plurality of control units, the plurality of control units being mounted on the pile wall,
the plurality of control units being arranged in a circumferential direction of the elastic inner ring at intervals, and a driving end of each of the plurality of the control units pressing against an outer side of the elastic inner ring so as to extrude or release the elastic inner ring;
the elastic inner ring is made of rubber, and an interior of the elastic inner ring is inflated.
 
6. A shield sealing method, wherein the shield sealing method uses a shield sealing device, as claimed in claim 1, and the shield sealing method comprises:
enabling the control unit to be at an initial position when the cutter head is located in the elastic inner ring;
enabling the plurality of the control units to extrude the elastic inner ring to a first state when a front shield of the shield tunneling machine is located in the elastic inner ring;
enabling the control units to extrude the elastic inner ring to a second state when a middle shield of the shield tunneling machine is located in the elastic inner ring; and
enabling the control units to extrude the elastic inner ring to a third state when a rear shield of the shield tunneling machine is located in the elastic inner ring.