CA2668745A1 - Method of stabilizing a new pipe inserted into an existing pipe - Google Patents

Abstract

The present invention consists of a method of permanent stabilization between the existing receiver pipe and the new insertion pipe. In the method, the new insertion pipe is installed inside the existing pipe, from where the new pipe comprises generally ocular-shaped holes through which is injected a urethane polymer foam allowing the delivery condition of the existing pipe.

Description

ISOKIN

DESCRIPTIVE MEMORY
Technical area:

This invention is related more particularly to a method of stabilization between the existing receiver pipe and the new insertion pipe.
Prior art:

High density polyethylene pipe is often used in insertion in an existing pipe, but deteriorated. This method involves inserting the pipe in the pushing or pulling it into the existing pipe. The annular space between two is usually filled with cement grout.

On the other hand, this method of setting up often offers many disadvantages such as:

A laborious preparation logistics, Seal all leaks in the existing receiver hose, If there is water, the grout is very diluted, The grout must be manufactured according to the existing conditions (low slope, slope strong), carried out in several stages, and then approved each time by a engineer, Loss of volume due to the height of fall, Temporary partitions placed inside the insertion pipe to counter the vertical thrust exerted by the grout, Supply and installation of plugs downstream and upstream to prevent leakage cement, Watertight chimneys and vents, including Occasionally Cement residue in watercourses (environment), and Laying of membrane to prevent the infiltration of cement.
A review of the prior art has revealed the following patents:
CA 2,220,207 Bizien, filed November 05, 1997.

CA 2,489,959 Kamiyama, filed December 13, 2004.
CA 2,181,599 Chick, filed January 17, 1995.

CA 2,479,961 Quigley, filed March 28, 2003.
CA 2,188,102 Boyer, issued April 20, 1999.
CA 2,123,796 Wood, issued October 18, 2005.
CA 2,630,074 Anders, filed April 28, 2008.
CA 2,578,757 Kamiyama, filed on August 17, 2005.
CA 2,230,538 Barry, filed August 28, 1996.

CA 2,180,968 Smith, filed July 10, 1996.
CA 2,121,855 Garneau, filed April 21, 1994.
CA 2,252,338 Rabby, issued on February 11, 2003.
US 5,738,146 Abe, issued April 14, 1998.

T960,001 Knight, issued July 5, 1977.

U.S. 5,427,819 Weyers et al., Issued June 27, 1995.
US 7,018,691 Mcneil, issued March 28, 2006.

US 6,009,912 Andre, issued January 4, 2000.

2 US 5,104,595 Hunter, issued April 14, 1992.

US Des. 275,451 Galloway, issued September 11, 1984.
Summary of the invention The present invention consists of a method of permanent stabilization between the existing receiver pipe and the new insertion pipe.

In the method, the new insertion pipe is installed inside the pipe existing, hence the new pipe includes generally shaped holes eyepiece through which is injected a urethane polymer foam allowing the rehabilitation of the existing pipe.

Advantages:
No need to plug leaks in the receiver pipe The process pushes outside the water flow in the annular space between the walls of the receiving pipe and the insertion pipe, No loss of volume due to the height of fall, No need to install partitions inside the insertion pipe, No cap is needed downstream and upstream, No need for chimneys or vents, Facilitates integration projects in remote areas, Saves time and money, and Increases the quality of the finished product.

Brief description of the drawings:

The present invention will be better understood from the description which follows with

3 reference to the drawings in which:

Figure 1 is an isometric view of the installation of the new pipe insertion in the existing pipe.

Figure 2 is a sectional view of the installation of the new pipe insertion in the existing pipe.

Description of a preferred embodiment:

In the description that follows and in the accompanying drawings, the following statistics similar ones refer to identical parts in the figures.

As shown in Figure 1 and 2, we see the installation of the new pipe insert (2) which is installed inside an existing pipe (5), hence the pipe (2) includes holes (3) which are made from the inside of the pipe and generally of ocular shape. The holes (3) are located in the top and on each side of the pipe (2), and which are intended for receiving a urethane polymer foam (4). Urethane polymer foam (4) is designed specifically for this kind of work, and a reaction time Extended allows the product to fill all spaces before swelling.
In addition, the injection of this foam by means of a specially designed gun for this kind of work, allows to push outside the flow of water between the walls of the existing pipe (5) and the new insertion pipe (2).

Galvanized wire mesh (not shown) is installed at each end for ensure a reinforcement to all tests.

The injection of high density polyurethane through the wire mesh (downstream and upstream)

4 is cut to the desired shape. An armature made of 100% fiber polyester manufactured without chemical binder, is installed to receive a coating mono-component sealant based on polyurethane and finalized by a granular ceramic.

It is understood that the embodiment of the present invention which has summer described above, with reference to the accompanying drawings, has been given as a indicative and in no way limiting, and that modifications and adaptations may be without the object departing from the scope of this invention. Other achievements are possible and limited only by the extent claims which follow the detailed description of the invention.

Legend:

1. Water 2. Insertion pipe 3. Drilling 4. Urethane polymer foam

5. Existing receiver pipe

6. Embankment

7. Ground

8. Embankment

9. Gravel

10. Asphalt

Claims

CLAIM (S):
The embodiments of the invention in respect of which an exclusive right of property or privilege is claimed, are defined as follows: 1. A stabilization method for insertion pipe, hence the method comprises:

a new pipe installed inside an existing pipe which the new pipe includes holes made from the inside of the pipe and usually ocular form, which holes are located at the top and each side new pipe for receiving a urethane polymer foam hence an extended reaction time allows the product to fill all spaces before swelling, and hence the injection of the foam allows for push outside the water flow between the walls of the pipe existing and the new insertion pipe.