JPS5845937B2 - Pipe lining method and lining material terminal treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides lining for repair and reinforcement of pipelines mainly buried underground, such as gas pipelines, water pipelines, cable buried pipelines such as power lines and communication lines. The present invention relates to a method and apparatus for treating the ends of a lining material in a method.

A method for lining a pipe is to insert the lining material into the pipe while inverting it using pressure fluid, and then press the inverted lining material onto the inner surface of the pipe to line the pipe. It has been known.

This method does not require excavation of the entire pipe, and allows long pipes to be lined reliably in a short period of time. It is receiving particular attention.

This method will be explained with reference to FIG. 1. Reference numeral 1 denotes a pressure vessel, the tip of which is connected to a flexible guide tube 2, and the tip of the guide tube 2 is further connected to one end of a conduit 3.

Reference numeral 4 denotes a lining material, which is wound in a coil shape around the reel 5 in a flat folded state.

One end of this lining material 4 is pulled out from the reel 5, enters the pressure vessel 1 through a slit 6 formed at the rear end of the moka container 1, and is fixed to the tip of the pressure vessel 1 in an annular shape.

Furthermore, a hose 7 having a length approximately equal to the length of the lining material 4 is connected to the free end of the lining material 4, and this hose 7 has a large number of fine through holes bored in its outer wall. ing.

The hose 7 is wound around the reel 5, and the lining material 4 is wound around the hose 7.

Furthermore, a string-like object 8 is inserted into the lining material 4 over its entire length, one end of which is connected to the free end of the lining material 4, and the other end connected to the annular fixed portion of the lining material. It passes through the pipe 3 and is wound around the take-up machine 9.

When a falling force fluid, such as compressed air, is introduced into the pressure vessel 1, fluid pressure acts on the outside of the lining material at the rear of the annular fixed portion, and the lining material 4 is pushed inside the annular fixed portion. Flip the folded part 1 so that it is on the outside.
0 is formed.

Next, when the pulling machine 9 is driven to pull the string-like material 8, the lining material 4 is inverted at the folded part 10 so that the inside becomes the outside, and the folded part 10 is guided by the guide pipe 2, and the lining material 4 is guided by the guide pipe 2, and the lining material 4 is turned over at the folded part 10 so that the inside becomes the outside. 3 from one end to the other.

The inverted lining material 4 is then pressed onto the inner surface of the conduit 3 via an adhesive that has been applied to the lining material 4 in advance.

As the folded portion 10 advances, the uninverted lining material 4a wound around the reel 5 is sequentially unwound, supplied to the folded portion 10, and reversed.

When the lining material 4 is completely unwound from the reel 5, the hose 7 is unwound from the reel 5, and the pipe line 3 is unwound.
It is inserted into the inside of the inverted lining material 4b which is properly attached inside.

In this way, when the lining material 4 is reversed and the folded portion 10 comes out from the other end of the pipe, conventionally, the lining material 4 is further reversed at the free end 1 as shown in FIG. .

Then, while maintaining the fluid pressure inside the inverted lining material 4b, appropriate metal fittings are attached to both ends of the lining material 4b and the hose T, and pressurized steam is fed into the hose 7. The adhesive leaks from the through hole, and the space between the inverted lining material 4b and the hose 7 is made into a heated atmosphere to accelerate the curing of the adhesive and firmly attach the inverted lining material 4b to the inner surface of the pipe line 3. It is glued.

In this method, conventionally, the lining material 4 was inverted at its free end 1 at the other end of the conduit 3, as described above.

Therefore, it is necessary to ensure that the free end of the lining material 4 is in a position suitable for handling in the next step when the reversal is completed.

However, in actual construction, there is not enough construction space, and the suitable position for the next work is only within a few meters.

Inserting a lining material several hundred meters long into an underground pipeline that cannot be seen from the outside, and then correctly setting the position where the free end of the lining material reaches with an error of only a few meters. I have to say that this was an extremely difficult task.

If the length of the lining material is too short, even if the lining material is turned over with its free end dimension, it will not reach the correct position 1, and the next operation will have to be carried out in a narrow working hole, which will be extremely difficult. be.

Moreover, if the free end of the lining material cannot reach the other end 1 of the pipe, further work will be completely impossible.

Also, if the lining material is too long, the reversal will not be completed even if the folded part reaches the pulling device 9, and the end of the hose will be halfway through the lining material that has already been turned over, making it difficult to attach the metal fittings to the hose. I can't.

The present invention takes this situation into consideration and aims to provide a method and apparatus for disposing of the lining material and the tip of the hose coming out of the pipe in a position most suitable for the work.

FIG. 3 shows the apparatus of the invention.

Reference numeral 11 denotes a closure device, which has a pressure fluid inlet port 1 on its outer wall.
A flexible tube 14 is inserted into a cylindrical body 13 provided with a cylindrical body 13, and is annularly fixed to both ends of the cylindrical body 13, which are both ends of the tube 14. When pressure fluid is introduced, the cylinder body 13 and tube 14
The space between the tube 14 is compressed inward by the external pressure, and the space within the tube 14 is closed.

Reference numeral 15 denotes a lining material fixing fitting attached to the tip of the closure device.

This lining material fixing fitting 15 includes an insertion piece 16 having tapered surfaces on the inner and outer surfaces of its tip, and a recess 1 having a tapered surface that matches the tapered surface of the tip of the insertion piece 16.
The receiver formed with 7 is twisted with a piece 18, and the tip of the lining material 4 is folded back to the outside at the tip of the insertion piece 16, and in this state, the insertion piece 16 is fitted into the recess 17 of the piece 18. ,
The lining material 4 is fixed.

Reference numeral 19 denotes a sealing device detachably connected to the tip of the lining material fixing fitting 15.

This sealing device has a pair of three-tube rollers 21 and 22 rotatably supported at the tip of a barrel 20 whose rear end has a circular cross section and whose tip has a rectangular cross section, and whose tip expands from the rear. Rubber-like elastic plates 23.24 fixed to the upper and lower inner surfaces of the barrel 20 are brought into contact with the outer peripheral surface of the nip roller 21.22 to prevent pressure fluid from leaking from the front end of the sealing device 19. It has become.

Next, to explain the present invention in detail, first, the length of the lining material is made sufficiently longer than the length of the pipe line 3, and this is attached to the reel 5.
This lining material is then turned over in exactly the same manner as described with reference to FIG. 1, inserted into the pipe 3, and crimped onto the inner surface of the pipe.

A closing device 11 is installed at the other end of the conduit 3.

A lining material fixing fitting 15 may be attached to this closing device 11.

The folded portion of the lining material 4 that comes out from the other end of the conduit 3 passes through the closure device 11, and when it comes out from the tip of the closure device 11, the take-up device 9 is stopped to stop the reversal of the lining material 4. .

At this time, since the length of the lining material 4 is sufficiently long, the inversion has not progressed at the free end 1 of the lining material 4, and the free end is still in the middle of the inverted lining material 4b.

In this state, when pressure fluid is introduced from the strain fluid inlet 12 of the closing device 11, the tube 14 is crushed and holds the inverted lining material 4b, thereby closing the inside thereof.

As a result, the fluid pressure within the pressure vessel 1 does not reach the folded portion 10 of the lining material.

Next, the lining material 4 in front of the occlusion device 11 is incised, and the lining material fixing metal fitting 15 is attached to the tip of the occluding device 11, and the tip of the inverted lining material 4b is attached to the lining material fixing metal fitting 1.
5 in a ring shape.

Furthermore, a sealing device 1 is provided at the tip of the lining material fixing fitting 15.
9 is attached, and the tip of the uninverted lining material 4a is passed between the nip rollers 21 and 22 of the sealing device 19 and wound around the take-off device 9.

Subsequently, when the pressure fluid in the occlusion device 11 is removed, the tube 14 expands and releases the occlusion of the inverted lining material 4b.

At this time, the fluid pressure in the pressure vessel 1 is applied to the front of the closure device 11, but the sealing device 19
and plates 23 and 24, so that fluid pressure will not leak.

Then, the take-up device 9 is driven to remove the uninverted lining material 4a.
, and the hose 7 connected to its free end is pulled out at the front 1 of the sealing device.

After doing so, the closing device 11 is closed again to cut off the fluid strain force from the pressure vessel 1, the sealing device 19 is removed, and the tip of the hose 7 is fixed there with an appropriate metal fitting.

Then, the closing device is opened again and pressurized steam is introduced into the hose T to harden the adhesive.

According to the present invention, since the length of the lining material 4 is sufficiently long, the length of the lining material 4 is not too short.

Furthermore, since the lining material 4 is not turned over at the free end 1, there is no possibility that the lining material 4 will become too long, thereby making it impossible to work.

In addition, since all steps are performed with the fluid pressure inside the lining material 4b that has already been inverted once sealed, there is no possibility that the pressure will drop and the lining material 4b that has been inverted will separate from the inner surface of the pipe line 3. There is no such thing.

In the above description, the lining material 4 is reversed by pulling the string-like object inserted into the uninverted lining material 4a, but the lining material is reversed by the fluid pressure sent into the pressure vessel 1. A reversal of 4 may also be performed.

However, the method using the string-like material 8 requires lower pressure of the fluid sent into the pressure vessel 1, has less fluctuation in pressure, and can be smoothly reversed even if there is an overture in the pipe line. It has the advantage that it can be advanced and lined.

Moreover, what is connected to the free end of the lining material 4 is not limited to the above-mentioned hose, but any suitable long object can be drawn in.

For example, it is also possible to connect a rope and use this rope to pass a camera or the like into the lining material 4b of the inversion tube to inspect the lining condition.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the basics of the pipe lining work according to the present invention, and FIG. 2 shows the state at the end of the conventional pipe lining at the other end. FIG. 3 is a central longitudinal sectional view of the device of the invention. 4 and 5 illustrate the steps of the method of the invention. 3... Pipe line, 4... Lining material, 4a.
...Uninverted lining material, 4b... Inverted tube lining material, 7... Hose 8... String-like material, 10... Folded part, 11...
・Closing device, 13...Cylinder body, 14...
Tube, 15... Lining material fixing fitting, 19.
... Seal device, 20 ... Body, 21.2
2...Nip roller, 23.24...
・Board.

Claims (1)

[Claims] 1. One end of the lining material folded flat is fixed in a ring shape,
While applying fluid pressure to the rear part of the annular fixed part, at the folded part of the lining material formed there, the lining material is turned over so that the inside becomes the outside, and the folded part is guided inside the pipe from one end thereof. In this method, the lining material is made to be sufficiently longer than the length of the pipe, and the free end of the inner lining material is made to be sufficiently longer than the length of the pipe. Connect a flexible elongated article with approximately the same length as the lining material to the lining material, and then turn the lining material over with the folded portion coming out from the other end of the conduit and the uninverted portion of the lining material remaining. Stop, press and close the inverted lining material from the outside,
The cut-back portion is cut open, the end of the inverted lining material is fixed in an annular shape, the blockage is released while maintaining the fluid pressure within the inverted lining material, the uninverted lining material is pulled out, and the elongated article is inverted. A method for lining a conduit, which is characterized by inserting the line through the entire length of the already lined lining material. 2. The method for lining a pipe according to claim 1, wherein the lining material is reversed by fluid pressure. 3. A patent claim characterized in that a string-like object is inserted into the lining material in advance, and the string-like object protruding from the folded portion of the lining material is pulled through the pipe to advance the inversion of the lining material. A method for lining a pipe according to scope 1. 4 Apply adhesive to the inner surface of the uninverted lining material,
2. The method for lining a conduit according to claim 1, wherein the inverted lining material is adhered to the inner surface of the conduit via the adhesive. 5 A long article is a hose with a large number of fine holes drilled in its outer wall, and pressurized steam is sent into the hose inserted into the inverted lining material to promote curing of the adhesive. 5. A method for lining a pipe according to claim 4, wherein the method comprises: 6. A closing device into which a cylindrically expanded lining material can be inserted and which can be closed by pressing the lining material; It consists of a lining material fixing fitting to be fixed, and a sealing device detachably attached to the tip of the lining material fixing fitting, and the sealing device is provided with a pair of nip rollers in the tip of a cylindrical body, and a pair of nip rollers are provided in the tip of the cylindrical body, An end processing device for a lining material, characterized in that a plate of a rubber-like elastic body attached to the inner surface of the lining material is brought into contact with each of the nip rollers. 7. The lining material end processing device according to claim 6, wherein the nip roller is covered with a rubber-like elastic body. 8. The lining material end processing device according to claim 6, wherein the body has a circular rear portion and a square tip portion, and the tip portion is wider than the rear portion.