JP3547941B2 - Rehabilitation repair method for existing pipeline - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rehabilitation repair method for an existing pipeline, and more particularly, to a rehabilitation repair method for an existing pipeline in which a branch member is provided at a required location.
[0002]
[Prior art]
Metal pipes such as steel pipes and cast iron pipes are used for existing pipes such as gas pipes, water pipes, and communication pipes buried underground, etc. In some cases, the gasification phenomenon proceeds, and a defective portion such as a leak hole is formed in the pipe.
[0003]
Conventionally, for gas pipes and water pipes that require airtightness for the purpose of repairing defective spots and preventing the progress of the phenomenon due to aging phenomena, resin pipes are lined with resin liquid on the inner surface of the pipes. In addition, a rehabilitation repair technique has been used in which a sealing tube is inserted into a tube instead of a resin solution to improve the sealing property of the tube, and the sealing tube is lined.
FIG. 4 is a schematic view for explaining a technique of lining a seal tube among the rehabilitation repair techniques. In FIG. 4, a pipe to be rehabilitated and repaired has a branch formed at a required portion in a laying direction. This is a main branch pipe 1 in which a branch member 3 is provided in a portion 1A. As the branch member 3, a split sleeve, a branch saddle, or the like is used, and a branch pipe (not shown) or the like is fastened and connected.
The main pipe 1 has first and second openings 1B and 1C formed at both ends of the rehabilitation repair section, and a negative pressure generating means 4 such as a suction pump is connected to the first opening 1B.
A resin delivery device 5 filled with an adhesive resin and a tube delivery device 7 provided with a seal tube (hereinafter simply referred to as a tube) 6 on a reel are selectively connected to the second opening 1C. A fluid pump 8 and a fluid injection device 9 for feeding the tube 6 while inflating the tube 6 are connected to the tube delivery device 7.
[0004]
When performing rehabilitation repair on the main pipe 1 having the above-described configuration, the inside of the main pipe 1 is negatively pressured by the negative pressure generating means 4 and the pig and the resin for adhesion from the resin injection device 5 (for convenience, the symbol A is used. (Shown) into the tube.
The tube 6 is paid out from the tube delivery device 7. In this case, the fluid pressure from the fluid injection device 9 acts on the tube 6 via the fluid pump 8 to send the tube 6 into the tube. The tube 6 reverses under the fluid pressure, and is attached to the inner wall surface of the tube via the adhesive resin A.
[0005]
[Problems to be solved by the invention]
The rehabilitation repair is performed by attaching the tube 6 to the main pipe 1 by the above-described procedure. However, when the branch member 3 is provided in the rehabilitation repair section of the main pipe 1, the tube 6 is attached. In some cases, the adhesive resin A used for the above enters the inside of the branch portion 1A and is solidified in the entered state. When the adhesive resin A is solidified, it means that clog the communicating position of the branch pipe 1A and the branch pipes 1, will be the flow of gas from the branch pipe 1 to branch non 1A is cut off, the supply of gas There was a problem that it became impossible.
[0006]
An object of the present invention is to prevent the resin from entering the branch member when performing a rehabilitation repair on an existing pipeline provided with a branch member, in view of the above-described problem in the conventional existing pipeline rehabilitation repair method. It is an object of the present invention to provide a rehabilitation repair method capable of securing a communication state between the main pipe and the branch pipe.
[0007]
[Means for Solving the Problems]
In order to achieve this object, a first aspect of the present invention is to generate a negative pressure from one end of an existing pipeline in which a branch member is provided at a required location, and the negative pressure causes the adhesive resin and the adhesive resin to form a pipe. the lining tube affixed to road inner wall surface is moved toward the other end from one end of the existing pipe, a rehabilitation repair method lining the lining tube on the inner wall surface of said existing pipe, detachably attached to the branch member It is provided to be possible, and the tip of the distal end portion is formed so as to be substantially the same as the opening surface of the existing pipe in which the branch member is provided by a fastening amount when fastening to the screw portion formed in the branch member . position using the plug member positionable and is characterized by passing the pre SL adhesive resin and lining tube in a state that closes the opening surface of the existing pipeline.
[0008]
According to a second aspect of the invention, the rehabilitation repair method of the existing pipeline of claim 1, wherein said plug member has an outer shape matching the internal shape of the branch member, a portion of the outer shape It is characterized in that the inside of the branch member is sealed.
[0009]
According to a third aspect of the invention, the rehabilitation repair method of the existing pipe line according to claim 1 or 2, wherein said plug member is a predetermined shape regardless of the format of the branch member, pressing the head of the plug member And it is characterized in that it is configured in combination with a pressing member that prevents the branch member from coming off .
[0010]
Invention of claim 4, in rehabilitating repair method according to claim 1 or 2 existing pipe line according to said plug member, can be pressed against O-ring is provided for the branch member wall, the dividing member It is characterized by maintaining the air-tightness of the existing conduit when attached to.
[0011]
[Action]
According to the first aspect of the present invention, the distal end of the plug member is disposed so as to be substantially the same as the opening surface of the existing pipeline in which the branch member is provided , so that the opening surface can be closed. As a result, airtightness in the existing pipeline can be maintained, and the pressure in the existing pipeline can be appropriately reduced to a negative pressure. In addition, since the opening surface for branching formed in the existing pipe is closed with a surface substantially the same as the inner wall surface of the existing pipe, the adhesive resin does not enter the branch member side even when the adhesive resin passes.
[0012]
According to the second aspect of the present invention, a part of the outer shape conforming to the inner shape of the branch member is adapted to the inside of the branch part, and the inside of the branch part can be sealed.
[0013]
According to the third aspect of the present invention, inadvertent removal of the plug member is prevented by combination with the pressing member, so that the inside of the branch member can be securely sealed.
[0014]
According to the fourth aspect of the present invention, the O-ring provided on the plug member can increase the airtightness in the existing pipeline, so that the negative pressure in the existing pipeline can be appropriately maintained.
[0015]
【Example】
Hereinafter, the details of the claimed invention will be described with reference to the illustrated embodiments.
FIG. 1 is a schematic view corresponding to FIG. 4 showing an existing pipeline to which a rehabilitation repair method according to the present invention is applied. In the drawings after FIG. 1, the same members as those shown in FIG. 4 are denoted by the same reference numerals.
In FIG. 1, a branch member 3 is provided at a branch portion 1 </ b> A of the main pipe 1 corresponding to an existing pipeline, and an opening surface of the branch member 3 communicates with the inside of the main pipe 1. In the present embodiment, the case where the service tee 30 is connected to the branch member 3 is described, and the service tee 30 is also described as being included in a part of the branch member 3.
Prior to the rehabilitation repair, the plug member 20 is fastened to the end of the service tee 30 fastened to the branch member 3.
As shown in FIG. 2, the plug stopper member 20 includes a plug stopper main body 20A and a pressing member 20B.
The plug plug main body 20A has an outer shape adapted to the internal shape of the service tee 30, and in this embodiment, is adapted to the internal shape of the connection portion 30A of the service tee 30 communicating with the branch portion 1A of the main pipe 1. An outer peripheral surface portion having substantially the same inner diameter so that no gap is formed between the inner surface of the connecting portion 30A of the service tee 30 and a tapered surface 20A1 which can be in close contact with the tapered portion 30B formed on the service tee 30 at the outer peripheral surface portion. .
A rod portion 21 that is continuous with the tapered surface 20A1 is integrated with the plug stopper body 20A, and the rod portion 21 is used as a grip portion.
[0016]
The pressing member 20B is formed of a cap member formed on an outer peripheral surface of a screw portion 20B1 that can be fastened to a screw portion 30C formed in a plug mounting opening of the service tee 30, and a bottom inner surface thereof is a plug plug. It comes into contact with the upper end of the rod portion 21 of the main body 20A.
The pressing member 20B is a member whose length from the position of the screw portion 20B1 to the bottom can be selected, and is selected according to the distance from the plug mounting opening of the service tee 30 to the screw portion 30C and the length of the rod member 21. Is used.
[0017]
In this embodiment, rehabilitation repair is performed using the plug stopper member 20 having the above-described configuration. That is, at the time of rehabilitation repair, the plug plug main body 20A is inserted from the plug mounting opening of the service tee 30.
When the tapered surface 20A1 abuts on the tapered portion 30B of the service tee 30 in the service tee 30, the plug stopper main body 20A cannot be further inserted, and a gap is formed between the inner surface of the connecting portion 30A of the service tee 30. It is arranged with almost no state.
When the tapered surface 20A1 has been inserted into the service tee 30, the pressing member 20B is attached to the service tee 30 next.
The pressing member 20B is integrated with the service tee 30 by fastening the screw portion 20B1 to the screw portion 30C near the plug attachment opening of the service tee 30, and is released from the service tee 30 by releasing the fastening.
At this time, the pushing amount of the pressing member 20 </ b> B that advances in the service tee 30 is obtained according to the fastening amount. Therefore, when the pressing member 20B is further advanced while being in contact with the upper end of the rod portion 21, the rod portion 21 is pressed, and the tapered surface 20A1 of the plug plug main body 20A is brought into close contact with the tapered portion 30B of the service tee 30. In addition, since the plug stopper body 20A is pressed by the pressing member 20B, the plug stopper main body 20A is maintained in a state in which the plug body 20A is prevented from coming off due to pressure from the inside of the existing pipeline 1.
[0018]
In the present embodiment, the length between the tapered surface 20A1 of the plug stopper main body 20A and the tip of the plug stopper main body 20A is not specified, but the length from the opening surface 3A of the branch member 3 to the branch portion 1A communicating with the main pipe 1 is not specified. It is preferable that the distal end of the plug body 20A does not protrude into the main pipe 1 in accordance with the length corresponding to the distance. However, in order to prevent the resin flow from being hindered by the distal end of the plug plug main body 20A protruding into the main pipe 1, the distal end of the plug plug main body 20A can be positioned at a position slightly recessed from the branch portion 1A of the main pipe 1 in a slight amount. Alternatively, the length from the tapered surface 20A1 to the tip may be defined. However, when the leading end is located at a position deeper than the branch portion 1A, it is desirable that almost no resin flows into the branch member 3 from the branch portion 1A.
[0019]
When the tapered surface 20A1 is brought into close contact with the opening surface 3A of the branching member 3, the communicating portion between the branching member 3 and the branching portion 1A is completely closed by the plug member 20. Of the resin is prevented from flowing.
In addition, it is desirable to form a resin release layer or the like on the distal end surface and the outer peripheral surface of the plug stopper main body 20A for improving the releasability from the resin flowing in the main pipe 1.
Further, if the tapered surface 20A1 is provided with a property different from that of the other portions, in this case, as an elastically deformable member, the adhesion at the time of the pressing action by the pressing member 20B and the position of the tip of the plug stopper main body 20A are provided. Adjustment becomes possible, and the branch part 1A can be adjusted.
According to the above-described embodiment, it is possible to control the adhesion between the tapered surface 20A1 of the plug plug main body 20A and the tapered portion 30B of the service tee 30 according to the fastening state of the pressing member 20B, that is, the amount of fastening advance / retreat. Since it is possible, only the operation of dropping the plug plug main body 20A into the branch member 3 is sufficient, and it is not necessary to check the close contact state after dropping the plug plug main body 20A. The interruption work can be simplified.
[0021]
Next, the invention according to claim 4 will be described. In the drawing shown in FIG. 3, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.
The invention according to claim 2 is characterized in that an O-ring for maintaining airtightness is provided on the plug stopper member.
FIG. 3 shows a plug plug member (indicated by a dashed line in FIG. 2) 20 'used for rehabilitation repair according to the second aspect of the present invention.
3, unlike the configuration shown in FIG. 2, the plug plug member 20 'does not have the tapered surface 20A1 to which the rod member 21 is connected.
On the other hand, the plug stopper member 20 'is provided with an O-ring 22 near the tip of the plug stopper body 20A'.
The O-ring 22 is formed of an elastic member having resin releasability, and is integrated with the outer peripheral surface of the outer peripheral surface near the tip of the outer peripheral surface.
[0022]
In this embodiment, rehabilitation repair is performed using the plug stopper member 20 'having the above-described configuration.
That is, at the time of rehabilitation repair, the plug plug main body 20A 'of the plug plug member 20' is inserted from the opening surface 3A of the branching member 3 as in the example shown in FIG.
Since the outer peripheral surface of the O-ring 22 interferes with the inner peripheral surface of the connecting portion 30A of the service tee 30, further insertion of the plug plug main body 20A 'inserted from the opening surface 3A due to its own weight is stopped. 20B is fixed.
When the pressing member 20B is fastened, the plug stopper body 20A 'is pushed by an amount of progress according to the fastening amount, and the plug stopper body 20A' stops insertion by its own weight due to the diameter reduction deformation of the O-ring 22. And its tip is positioned near the branch 1A.
When the fastening of the pressing member 20B is completed, the distal end of the plug stopper main body 20A closes the branch portion 1A opening to the main pipe 1. Since the O-ring 22 is arranged on the outer peripheral surface near the tip, in other words, near the opening of the branch 1A, the opening of the branch 1A is completely sealed by the tip of the plug body 20A and the O-ring 22. Thus, the inflow of resin from the main pipe 1 into the service tee 30 is reliably blocked.
[0023]
According to this embodiment, the airtightness can be improved by the O-ring 22 without increasing the outer shape accuracy of the outer peripheral surface portion, so that the cost required for processing the plug plug member 20 'does not need to be increased.
[0024]
【The invention's effect】
As is apparent from the above description, according to the first aspect of the present invention, by disposing the tip of the plug member so as to be substantially the same as the opening surface of the existing pipeline in which the branch member is provided , Since the opening surface can be closed, the inadvertent inflow of the adhesive resin into the branch member is prevented, and a situation in which the flow of fluid such as gas due to solidification of the resin is obstructed is eliminated. Becomes possible.
[0025]
According to the second aspect of the present invention, it can be part of the outer shape corresponding to the internal shape of the branch member for sealing the inner branch member to conform to the interior of the bifurcation. This makes it possible to reliably block the flow of the adhesive resin into the branch member .
[0026]
According to the third aspect of the present invention, the plug member is prevented from being accidentally pulled out in combination with the pressing member, and the inside of the branch member can be reliably sealed. This makes it possible to reliably maintain a sealed state inside the branch member .
[0027]
According to the fourth aspect of the present invention, the O-ring provided on the plug member can improve the airtightness in the existing pipeline, so that the resin flows into the branch member and the communication portion between the existing pipeline. And the adverse effect due to the solidification of the resin can be prevented beforehand.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining a rehabilitation repair method according to the first aspect of the present invention.
FIG. 1 is a local sectional view for explaining members used to carry out the rehabilitation repair method shown in FIG.
FIG. 3 is a local sectional view for explaining members used for performing a rehabilitation repair method according to the second aspect of the present invention.
FIG. 4 is a schematic view corresponding to FIG. 1 for explaining a conventional example of a rehabilitation repair method for an existing pipeline.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main branch pipe 1A equivalent to existing piping 1B Branch part 1B 1st opening 1C 2nd opening 3 Branch member 3A Screw part 4 Negative pressure generating means 6 Lining tube 7 Tube delivery device 20, 20 'Plug stopper member 20A, 20A' Plug plug body 20A1, 20A1 'Taper surface 20B, 20B' Pressing member 20B1 Screw portion 21 Rod portion 22 O-ring 30 Service tee 30A communicating with branch member 30B Communication portion to branch portion 30B Tapered portion 30C Screw portion

Claims (4)

Negative pressure is generated from one end of an existing pipeline in which a branch member is provided at a required location, and the negative pressure causes an adhesive resin and a lining tube attached to an inner wall of the pipeline with the adhesive resin to one end of the existing pipeline. Moving from the other end to the other end, a rehabilitation repair method of lining a lining tube on the inner wall surface of the existing pipe ,
A surface that is detachably provided to the branch member and that is substantially the same as an opening surface of the existing pipe in which the branch member is provided according to a fastening amount when being fastened to a screw portion formed in the branch member. with a plug member positionable the position of the tip portion so that, rehabilitation of existing pipeline, characterized in that passing the pre SL adhesive resin and lining tube in a state that closes the opening surface of the existing pipe Repair method. 2. The method for rehabilitating an existing pipeline according to claim 1, wherein the plug member has an outer shape conforming to an inner shape of the branch member , and a part of an outer diameter of the plug member seals the inside of the branch member. A method of rehabilitating and repairing existing pipelines. 3. The method for rehabilitating an existing pipeline according to claim 1, wherein the plug member has a predetermined shape irrespective of the type of the branch member , and presses a head of the plug member to remove the plug member from the branch member. A rehabilitation repair method for an existing pipeline, wherein the method is configured in combination with a pressing member for stopping. According to claim 1 or 2 rehabilitating repair method of existing conduits of, wherein the plug member, can be pressed against O-ring is provided for the branch member inner wall surface, the existing when attached to the branch member A method for rehabilitating and repairing existing pipelines, which maintains airtightness in pipelines.

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