Title:
RECEPTACLE TYPE FIRE PROOF DOUBLE LAYER PIPE STORING FIRE-PROOF POWDER THERMAL EXPANSION RAW MATERIAL
Document Type and Number:
Japanese Patent JP2017180827
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To connect a fire-proof double layer pipe storing thermal expansion powder raw material therein with an incombustible pipe joint without using any supporting member.SOLUTION: This invention relates to a fire-proof double layer pipe comprising: a synthetic resin vertical drain pipe joint of which upper part is provided with a receptacle type connection end part for receiving a connection end part below an incombustible drain pipe joint passing through a floor slab in a vertical direction and having a rubber ring sealing between the receptacle type connection end part and the drain pipe joint installed therein; a band-like bag filled with fire-proof thermal expansion powder raw material arranged around an outer periphery of a narrow part of the receptacle type connection end part to close the connection end part through its expansion under heat of fire; a short-cylindrical fiber mixed mortar layer covering a peripheral surface of the receptacle type connection end part and the band-like bag; and a straight pipe made of fiber mixed mortar covering the vertical drain pipe. The peripheral surface of the fiber mixed mortar layer is covered by the fire-proof metallic cylinder for preventing damage of the mortar layer and the lower end surface of the fiber-mixed mortar layer is installed at the upper end surface of the straight pipe.SELECTED DRAWING: Figure 5
Inventors:
KUBOTA HIROYUKI
OKIDA SADAHARU
OKIDA SADAHARU
Application Number:
JP2017039194A
Publication Date:
October 05, 2017
Filing Date:
March 02, 2017
Export Citation:
Assignee:
FUNEN AKUROSU KK
International Classes:
F16L5/04; E03C1/12
Domestic Patent References:
| JP5451064B2 | 2014-03-26 | |||
| JP2012149707A | 2012-08-09 | |||
| JP2009108939A | 2009-05-21 | |||
| JP2010190034A | 2010-09-02 | |||
| JP2008106936A | 2008-05-08 | |||
| JP2013096116A | 2013-05-20 |
Foreign References:
| EP1512434A1 | 2005-03-09 |