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Title:
SINGLE-LEAF CONCRETE FIREPROOF PROTECTIVE CLOSED DOOR FOR HIGH-SPEED RAILWAY AND SUBWAY TUNNELS
Document Type and Number:
WIPO Patent Application WO/2021/174831
Kind Code:
A1
Abstract:
A single-leaf concrete fireproof protective closed door for high-speed railway and subway tunnels, comprising: a door frame (8) provided in a tunnel; hinges located on one side of the door frame; a door leaf (5) being a concrete door leaf and hinged to the door frame by means of the hinges; a fireproof sealing member provided on the attachment surface of the door frame and the door leaf; a linkage latch comprising a pedestal (4) and lock head assemblies (1) mounted on the door leaf, a handle (6) mounted on the pedestal, and transmission mechanisms (3) connected to the handle and the lock head assemblies, respectively; and an automatic reset device (90) comprising a base provided above the hinges, a mandrel (908) mounted on the base, and a torsion spring (903) sleeved on the outer side of the mandrel, one end of the torsion spring being an internal connection end (922) connected to the base, and the other end of the torsion spring being an external connection end (909) connected to the top surface of the door leaf. According to the closed door, the unlocking or locking of a plurality of lock head assemblies can be controlled simultaneously by one handle, thereby improving the locking effect and improving firmness and reliability during locking.

Inventors:
XIE FENG (CN)
WANG YANGMING (CN)
HU SHENGWEI (CN)
NONG XINGZHONG (CN)
XIONG KE (CN)
JIA YANMING (CN)
ZHANG DEJUN (CN)
ZHANG WEI (CN)
ZHAO JUNLONG (CN)
LIU JUNJIAN (CN)
ZENG CHENGLIANG (CN)
MIAO PENGHOU (CN)
CUI YANBIN (CN)
MA XIAOJIAO (CN)
ZHANG ZHENGYI (CN)
ZHANG XINHAO (CN)
Application Number:
PCT/CN2020/118585
Publication Date:
September 10, 2021
Filing Date:
September 28, 2020
Export Citation:
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Assignee:
GUANGZHOU METRO DESIGN&RESEARCH INST CO LTD (CN)
International Classes:
E21F17/12; E05B65/10; E05D11/04; E05F1/10; E06B5/16
Foreign References:
CN204877169U2015-12-16
CN2113322U1992-08-19
CN209413577U2019-09-20
CN202249374U2012-05-30
CN111425255A2020-07-17
CN102913107A2013-02-06
CN206205935U2017-05-31
JP2015129391A2015-07-16
Attorney, Agent or Firm:
BEIJING WUZHOUYANGHE & PARTNERS (CN)
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