JPH0677965B2 - Pipe line lining method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to repairing or repairing mainly conduits buried in the ground such as gas conduits, water pipes, sewer pipes, and laying conduits for power lines and communication lines. The present invention relates to a method for lining an inner surface with a lining material for the purpose of reinforcement.

2. Description of the Related Art Conventionally, as a method of lining pipes of this type, Japanese Patent Publication No. 59-129
The method described in Japanese Patent No. 11 is known. In this method, a string-like material is inserted into the lining material, the lining material is fixed to one end of the pipe line in an annular shape, and the fluid pressure is applied to the rear portion of the annular fixing portion, while the annular fixing portion is removed. The protruding string-like object is pulled through the pipe, and the lining material is turned inside out so that the inside is the outside at the folded portion formed in the annular fixed portion, and the folded portion advances along the pipeline. Then, the lining material that has been turned upside down is adhered to the inner surface of the pipe line to lining it.

Problems to be Solved by the Invention In this method, however, it is necessary to divide the pipeline into sections of about 2 to 300 m and perform the above-mentioned construction for each section.
If the length of the section is excessively long, it is necessary to insert the string-like object over the entire length of the long conduit and pull the string-like object to turn over the lining material. Therefore, the frictional resistance between the string-like object and the conduit increases, and a large force is required to pull the string-like object. Particularly when there are many bent portions of the conduit, a large force is required even if the section is relatively short.

On the other hand, in the case of lining by the above method, the length of the lining material may be the same as the length of the pipeline in principle, but there is some room for the lining material to perform work at both ends of the pipeline. The lining material is longer than the length of the section of the pipeline by a dozen meters. And the margin is required for each section, and the loss of the lining material is considerably large.

Moreover, since the liner is lined in each section, the pipeline must be cut at the boundary of the section, the lining material must be inserted into the pipeline and bonded, and then both ends of the lining material must be appropriately treated and fixed to the inner surface of the pipeline. In addition, after that, the cut sections must be connected to regenerate a continuous pipeline.

If it is possible to line the longer section at one time, these problems will be greatly reduced, and it will be possible to more efficiently line the section.However, due to the above-mentioned circumstances, it is difficult to lengthen the section. It was.

Therefore, the above-mentioned lining method is superior to replacing each aged pipe line or repairing each damaged part, but it is better to line a longer pipe line at a time. There was a desire for a way to do it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method capable of lining a longer pipeline than the conventional method in one step.

Means for Solving the Problems Thus, the present invention forms a communicating portion that communicates with the outside at an appropriate interval in a continuous pipeline, and inserts a string-like object between the communicating portions of the pipeline, The end of the lining material, through which the string-like object is inserted over its entire length, is fixed to one end of the pipe line in an annular shape, and the string-like product inserted into the lining material and one end of the pipe line are inserted. While connecting the string-like material and applying fluid pressure to the rear part of the annular fixing portion of the lining material, pulling the string-like material from the communication portion closest to the one end to fix the lining material in the annular shape. While turning over so that the inside is the outside at the folded part formed in the part,
The folded portion is advanced along the duct to the vicinity of the communicating portion, and then the cord is pulled from the next communicating portion of the communicating portion to turn the lining material inside out, and the folded portion is guided along the duct. Repeatedly advancing to the vicinity of the next communication part, and finally pulling the string-like object from the other end of the pipeline to turn the lining material inside and proceed the folding part along the pipeline to the other end of the pipeline. Finally, the lining material is adhered to the inner surface of the pipe by the fluid pressure.

The present invention will be described below with reference to the drawings. The drawings show a situation in which the present invention is embodied, and 1 is a pipeline. The pipe 1 has a section of an appropriate length, and the section is cut by cutting it from other portions, but the length of the section is not limited to the conventional method, and theoretically You can also set an infinitely long interval.

The conduit 1 is formed with at least one communicating portion 2 communicating with the outside at an appropriate interval. The distance between the communicating portions 2 should be equal to or shorter than the length of the section which can be lined in one step by the conventional method. Although it varies depending on the inner diameter of the pipe and the degree of bending, in the case of a pipe having an inner diameter of 150 mm with little bending, it is suitable to form at intervals of 2 to 300 m or less.

Further, the structure of the communication part 2 is not particularly limited. For example, as shown in the communicating portion 2a in the drawing, a through hole may be bored in the conduit 1, and as shown in the communicating portion 2b, when a T-shaped portion is provided in the middle of the conduit, It is possible to remove the branch of the T-shaped tube that is not lined and use it as the communication part 2. In addition, a part of the pipeline 1 may be cut,
In addition, when a service tee or a clamp take-out portion is formed in the middle of the pipeline, these can be used.

Next, from one end to the other end of the pipe line 1, the cord-like material 3 is inserted between the communication portions 2. In addition, this string-like object 3 is connected to each communication part 2
Although it may be inserted separately for each interval, it may be inserted over the entire length of the conduit 1 and taken out to the outside at each communicating portion 2.

In the drawing, the pressure vessel 4 is attached to one end of the conduit 1. Inside the pressure vessel 4, an lining material 5 is wound in a coil shape and accommodated, and an end of the lining material 5 is fixed in an annular shape between the conduit 1 and the pressure vessel 4. The length of the lining material 5 is a length corresponding to the entire length of the pipe line 1, and the same margin as that described in the conventional example is required. A string-like object 6 is inserted into the lining material 5, and the string-like object 6 protruding from the annular fixing portion of the lining material 5 is inserted into the one end portion of the conduit 1. Connect to.

When the pressure fluid is fed into the pressure vessel 4 in this state, the fluid pressure acts on the rear portion of the annular fixing portion of the lining material 5, and the folded portion 7 is formed on the annular fixing portion. When the string-like object 3 is pulled through the duct 1, the folded-back portion 7
In, the lining material 5 is turned upside down so that the inner side is the outer side, and the folded portion 7 advances along the pipe line 1 and is crimped to the inner surface of the pipe line 1 by the fluid pressure.

Thus, in the present invention, first, the string-like object 3a inserted between the one end of the conduit 1 and the communication part 2a is pulled through the communication part 2a, and the folded part 7 is turned over while turning the lining material 5 inside out. It is advanced to the vicinity of the communication part 2a. In the initial stage of the towing, the string-like object 3a is towed, but from the middle, the string-like object 6 pulled out from the folded-back portion of the lining material 5 is towed.

Then, the towing is stopped, the string-like object 6 pulled out from the communicating part 2a is cut at an appropriate position, and the string-like object is inserted in the conduit 1 between the communicating part 2a and the communicating part 2b. Connect to thing 3b. Then, the string-like object 3b and the string-like object 6 are pulled through the communication portion 2b. As a result, the pipe line 1 is turned inside out at the folded part 7 as described above, and the folded part 7 advances along the pipe line 1 to reach the vicinity of the communication part 2b.

Then, the pulling is stopped again, the string-like object 6 pulled out from the communicating part 2b is cut at an appropriate position, and the string-like object is inserted between the communicating part 2b and the other end of the conduit 1. Connect to thing 3c. Then, the string-like object 3c and the string-like object 6 are pulled from the other end of the conduit 1. As a result, while the pipe line 1 is turned inside out at the folded line portion 7 as described above, the folded line portion 7 advances along the pipe line 1 and reaches the other end of the pipe line 1.

After that, the fluid pressure is maintained as it is, or the conduit 1 is heated by an appropriate means to cure the adhesive, and the lining material 5 is bonded to the inner surface of the conduit 1. Further, if the communication portion 2 is closed by an appropriate method, the liner 1 is completely lined.

In the above description, the communication part 2 is formed in two places, and the string 3 is divided into three parts to be pulled. However, the communication part 2 may be provided in one place, or three places. A large number may be formed as described above. Then, by pulling the string-like object 3 from the adjacent communication part 2 from one end of the conduit 1, the folded-back portion 7 is advanced to the vicinity of the communication part 2 repeatedly, and finally, at the other end of the conduit 1. To reach.

EFFECTS OF THE INVENTION According to the present invention, the long pipe is divided into a plurality of portions, and the string-like material is pulled for each of the portions, so that the lining material is turned inside out, so that the string-like material is pulled. The distance will be relatively short, and there will not be many bends in that portion. Therefore, the friction between the string-like object and the inner surface of the conduit does not increase more than necessary, and the string-like object can be pulled with a comparatively small force to advance the lining material inside out.

Nevertheless, the length of the finally lined pipe can be as long as necessary, and theoretically, it is also possible to line a line that is infinitely long at one time. However, the length of the lining material 5 that can be handled is actually limited, but it is possible to lining the pipe line to a length of several thousand meters, which is significantly longer than the conventional method described above.

In addition, in particular, even if there are many bends in the pipe line system and it was not possible to advance the lining material inside out by the conventional method, the number of bends contained in the pipe line would be excessive. It is also possible to temporarily line the inside of the continuous lining material by advancing the inside of the lining material by dividing it into several conduit portions so as not to increase in number.

Therefore, the loss due to the margin of the lining material is small,
Further, there is little work for processing the terminal portion of the lining material and reconnecting the cut portion of the pipeline, so that the construction time can be greatly shortened and the cost can be reduced.

Further, since the work in the communication part 2 is only the work of connecting the string-like object 3 to the next string-like object 3 except the work of pulling the string-like object 3 by an appropriate pulling means, the work time is It is short and almost the same as inserting the entire length of the pipe at a time. Further, it is necessary to close the communication part 2 after lining, but unlike connecting a cut pipe line, the work is extremely easy, and if the folded part 7 of the lining material passes through the communication part 2, In this case, the closing work can be immediately started, so that the time of the whole process is not extended.

[Brief description of drawings]

The drawings are conceptual diagrams showing a situation in which the method of the present invention is carried out. 1 ... Pipe, 2 ... Communication part 3,6 ... String-like material, 4 ... Pressure vessel 5 ... Inner lining, 7 ... Folded part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-104045 (JP, A) JP-A-59-89885 (JP, A)

Claims (1)

[Claims] 1. A continuous pipe is formed with a communicating portion that communicates with the outside at an appropriate interval, and a string-like object is inserted between the communicating portions of the pipe, and the entire length is provided at one end of the pipe. While fixing the end of the lining material that has been passed through the string-like material in a ring shape, connect the string-shaped object that is inserted into the lining material and the string-shaped object that is inserted into one end of the conduit, While applying fluid pressure to the rear portion of the annular fixing portion of the lining material,
Pulling the string-like object from the communication part closest to the one end,
While turning the lining material inside out at the fold-back portion formed in the annular fixed portion, the fold-back portion is advanced along the pipe path to the vicinity of the communication portion, and then the next portion of the communication portion. Towing the string-like material from the communication part and turning the lining material inside out, the folded part is advanced along the conduit to the vicinity of the next communication part, and finally the string-like material is removed from the other end of the conduit. The inside of the pipeline is characterized by advancing the folded-back portion along the pipeline to the other end of the pipeline while pulling and inverting the interior lining, and adhering the lining to the inside surface of the pipeline by the fluid pressure. Lining method