METHOD FOR REGENERATING INSIDE SURFACE OF PIPELINE OF HORIZONTAL BRANCH

Japanese Patent JP3188495

B2

PURPOSE: To clean the routes of the horizontal branches including the existing differential diameter pipes and differential diameter bends and joints, etc., of a structure, such as building, as they are, and to form smooth and fresh coating films having a uniform thickness over the entire inside wall surface thereof.
CONSTITUTION: The route of the horizontal branch 2 communicating with a waste stack 1 is cleaned and dried. A prescribed amt. of an epoxy resin coating material P is injected and distributed by applying the swirling motion in a flow direction thereto from the opening end 3a of an arbitrary drain pipe 3. Arbitrary numbers of expansion and contraction balls 13, 14 of the diameter slightly smaller than the largest diameter of the pipe to be applied prior to curing of the resin are connected and a rope 16 is connected to the extreme tail ball. These balls are inserted into the pipe from the opening end and are moved by air. After the balls are discharged from the terminal of the horizontal branch, the balls are reset and moved by the rope while the air is kept fed without interruption. The balls are taken out of the opening end and the smooth coating film having the uniform thickness is formed on the inside surface of the pipe by the jet flow of the air ejected from the spacings between the balls and the inside wall of the pipe. The coating films are successively and similarly formed in the routes of the other horizontal branches as well.

Akira Kamiya

JP29193591A

July 16, 2001

October 14, 1991

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Akira Kamiya

B05D3/12; B05D7/22; B05D7/24; (IPC1-7): B05D7/22; B05D3/12; B05D7/24

JP59142873A
JP5763175A
JP63100986A

Kazuo Shamoto (4 outside)

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