Title:
EXPANSION JOINT OF UNDERGROUND PIPING HAVING AUTOMATIC LOCKING STOPPER ATTACHED THERETO
Document Type and Number:
WIPO Patent Application WO/2014/182070
Kind Code:
A1
Abstract:
Disclosed is an expansion joint of underground piping having an automatic locking stopper attached thereto, the expansion joint having at least one stopping groove (22) formed along the outer circumference of a slip pipe (20), and locking grooves (35, 23) formed such that locking members (36, 25) locked by being stopped in the stopping groove (22) are accommodated therein and protrude therefrom on the inner circumference of an entrance side of a stuffing box (30). Thus, the provided expansion joint of underground piping having an automatic locking stopper attached thereto, has an automatic locking stopper for automatically locking a reverse movement due to a temperature change after absorbing an expansion amount up to a calculated expansion amount as a locking member which is formed on the inner circumference of a stuffing box by a stopping groove formed along the outer circumference of a slip pipe, through the expansion joint having the stuffing box in which the slip pipe expands and is transferred, thereby guiding a plurality of expansion joints so as to expand and absorb the expansion amount up to a calculated expansion amount of piping and displaying a moving distance thereof.
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Inventors:
AN CHANG YUP (KR)
Application Number:
PCT/KR2014/004056
Publication Date:
November 13, 2014
Filing Date:
May 08, 2014
Export Citation:
Assignee:
JOINT YOOCHANG THERMAL SYSTEMS CO LTD (KR)
International Classes:
F16L1/09; F16L21/08
Foreign References:
| JP2003014169A | 2003-01-15 | |||
| JPH09257178A | 1997-09-30 | |||
| JP4471682B2 | 2010-06-02 | |||
| JP2005257046A | 2005-09-22 | |||
| JPH08312856A | 1996-11-26 |
Attorney, Agent or Firm:
KWON, YungJoon (KR)
권영준 (KR)
권영준 (KR)
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