JPH0818369B2 - Tube lining material reversing method and reversing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining material reversing method and a reversing device used in a pipe repairing method for lining and repairing aged pipes.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the earth is deteriorated, a lining is applied to the inner peripheral surface of the pipeline without excavating the pipeline to repair the deteriorated pipeline. A construction method has already been proposed (see, for example, Japanese Patent Application Laid-Open No. 60-242038) and put to practical use. That is, in this pipe repairing method, a pipe lining material made by impregnating a flexible resin absorbent material with a curable resin is inserted into the pipe line while being inverted by fluid pressure, and the pipe lining material is inserted inside the pipe. By pressing on the surface, heating the pipe lining material while maintaining this state to cure the curable resin impregnated in this, and lining the inner peripheral surface of the aged pipe with the cured pipe lining material is there.

By the way, in such a pipeline repairing method, water pressure or air pressure is adopted as the fluid pressure used for reversing the pipe lining material.

[0004]

However, when water pressure (water head) is used to invert the pipe lining material, in order to obtain a water pressure of 1 Kg / cm ^2, a high pressure of about 10 m above the pipe line is required. Water column, especially when using a small diameter pipe lining material that requires a large reversal force, there is a problem that the height of equipment for obtaining the required water pressure is high and workability and work efficiency are poor. is there.

When air pressure is used to invert the pipe lining material, the entire pipe lining material is housed in a closed container due to the sealing property, and compressed air having a predetermined pressure is supplied into the closed container. Therefore, there is a problem that the equipment becomes large.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pipe lining material reversing method capable of reversing a pipe lining material with good workability in a small, compact and lightweight facility. To provide a reversing device.

[0007]

In order to achieve the above object, the method of the present invention is arranged in an opening at one end of a container while keeping airtightness,
A pair of roller bags that have been expanded by receiving the supply of fluid pressure are rotated while they are in contact with each other, a pipe lining material is passed between these roller bags, and the ends of the pipe lining materials that have passed between both roller bags are folded back. The container is fixed to the periphery of the opening of the other end of the container, and while the compressed gas is being supplied into the container, the roller bag is rotated to sequentially invert the pipe lining material.

Further, according to the present invention, a container whose both ends are open, a pair of inflatable roller bags which are rotatably arranged in an opening at one end of the container so as to be airtight, and the roller bag is rotationally driven. And a fluid pressure supply means for supplying fluid pressure to the inside of the roller bag and the inside of the container to constitute a reversing device for the pipe lining material.

[0009]

According to the present invention, since the pipe lining material is sequentially fed into the container by passing between the pair of deformable roller bags, the roller lining material of the roller bag is protected against the change in the thickness of the pipe lining material. It can be dealt with by changing the internal pressure. For example, when the thickness of the pipe lining material is increased, if the pressure fluid in the roller bag is drained by an appropriate amount to reduce the internal pressure of the roller bag, the roller bag is more easily deformed and the thickness of the pipe lining material is increased. Portions also easily pass between the roller bags and into the container. Moreover, in this case, since the roller bags rotate in contact with each other, the sealing performance is high, the airtightness of the container is kept high, and the reversal of the pipe lining material is facilitated.

Further, the reversing device according to the present invention reverses the pipe lining material by the pressure of the compressed gas while receiving the feeding action of the roller bag, and since the lightweight roller bag is used, it is small and compact. In addition, the structure is light and easy to handle, and the reversing work is efficiently performed.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view of the reversing device according to the present invention, FIG. 2 is a side sectional view of the reversing device, FIG. 3 is a broken perspective view showing valve means of the reversing device, and FIG. It is a sectional side view of an inversion device which shows the operation of the valve means.

The reversing device 1 according to the present invention comprises a duct-shaped container 2 having a rectangular cross section as shown in FIG.
One divided piece 2A, 2B, 2C is assembled and integrated, and both ends thereof are open as shown. Further, cylindrical guide cylinders 3 and 4 are provided above and below one end of the container 2, and the lower and upper halves of the guide cylinders 3 and 4 facing each other are partially formed in the central portion in the width direction. Are notched to form the openings 3a and 4a.

Pipe-shaped rotary shafts 5 and 6 penetrate through the central portions of the guide cylinders 3 and 4, respectively, and both ends of the rotary shafts 5 and 6 are bearings 7 and 8 (see FIG. 1). (Only one of which is shown in the figure) is rotatably supported and arranged parallel to each other. Gears 9 and 10 having the same diameter and the same number of teeth meshing with each other are coupled to one end portions of the rotary shafts 5 and 6 extending out of the container 2. A pulley 11 is attached to the outside of the pulley 11.
A belt 14 is wound between the pulley 13 and the pulley 13 connected to the output shaft end of the drive motor 12.

Further, the gears 9, 1 of the rotary shafts 5, 6 are
Air hoses 15 and 16 extending from the discharge side of an air compressor (not shown) are connected to end portions on the side where 0 is provided via swivel joints 17 and 18, respectively. The other ends of the rotary shafts 5 and 6 are closed.

Inflatable and contractible roller bags 19 and 20 made of vinyl chloride tubes and the like are attached to and supported by the rotary shafts 5 and 6, respectively, and these are provided at one end of the container 2. It penetrates through the guide cylinders 3 and 4. That is, both ends of the roller bags 19 and 20 extending outside the container 2 are fixed to the rotating shafts 5 and 6, respectively.
If compressed air from an air compressor (not shown) is supplied into the rotary shafts 5 and 6 through the air hoses 15 and 16, the compressed air is supplied from the circular holes 5a and 6a formed in the rotary shafts 5 and 6 to the roller bag 19 ,. Roller bags 19 and 2 squirt out into 20
0 are inflated as shown in FIGS. 1 and 2 to keep them cylindrical. When the roller bags 19 and 20 are inflated in this manner, the roller bags 19 and 20 are in close contact with the inner peripheral surfaces of the guide cylinders 3 and 4, and are formed in the central portions of the guide cylinders 3 and 4. The portions facing the openings 3a and 4a are in contact with each other at a predetermined pressure.

On the other hand, as shown in FIGS. 2 and 3, the container 2
A valve means 21 is provided on the central divided piece 2B. The valve means 21 has an expandable and contractible bag body 22 having an inner and outer double structure made of vinyl chloride, rubber or the like, and a bag body 22A inside the bag body 22 penetrates the divided piece 2B. Is attached to both ends of the pipe-shaped shaft 23, and the outer bag 22B is attached to the periphery of the opening of the cylindrical member 24 provided at both ends of the divided piece 2B.

A circular hole 23a is formed in a portion of the shaft 23 which faces the bag body 22, one end of the shaft 23 is closed, and the other end is from the discharge side of an air compressor (not shown). An air hose 25 to be led out is connected via an on-off valve 26.

An air hose 27 extending from the discharge side of an air compressor (not shown) is connected to the upper portion of the divided piece 2A of the container 2 via an opening / closing valve 28.

Next, a method of reversing the pipe lining material 30 using the reversing device 1 will be described.

As described above, when the drive motor 12 is rotationally driven in a state where compressed air is supplied to the roller bags 19 and 20 to expand them, the rotation of the drive motor 12 is caused by the pulley 13, the belt 14, and the pulleys. 11 and the gears 9 and 10 are transmitted to the rotary shafts 5 and 6, and the rotary shafts 5 and 6 and the roller bags 19 and 20 mounted and supported by the rotary shafts 5 and 6 are rotationally driven in the arrow directions of FIGS. 1 and 2. In this embodiment, the guide cylinders 3 and 4 are made of stainless steel, and the inner peripheral surfaces thereof are coated with a film for reducing friction with the roller bags 19 and 20.

Next, the end portion of the pipe lining material 30 formed by impregnating a curable resin into a flexible resin absorbent material is passed between the rotating roller bags 19 and 20, and the pipe lining material 30 is passed.
The rotation of the drive motor 12 is temporarily stopped when a predetermined length of the container 2 passes through the container 2, the tip of the pipe lining material 30 is folded back, and this is attached to the outer peripheral edge of the end of the container 2 (divided piece 2A). Then, the opening portions at both ends of the container 2 are closed by the pipe lining material 30 and the roller bags 19 and 20,
A closed space S is formed in the container 2. At this time,
Since compressed air is not supplied to the bag body 22 of the valve means 21 provided in the container 2, the bag body 22 is kept in a contracted state as shown in FIG.

Thereafter, the opening / closing valve 28 is opened to supply the compressed air from the air compressor to the closed space S of the container 2 through the air hose 27, while the drive motor 12 is re-driven to rotate the roller bags 19 and 20. For example, the pipe lining material 30 is sequentially inverted and inserted into an aged pipe (not shown) by the pressure of the compressed air supplied into the space S and further by the feeding action of the roller bags 19 and 20.

When the pipe lining material 30 is inverted and inserted into the aged pipe as described above, the on-off valve 26 of the valve means 21 is opened, and the compressed air from the air compressor is supplied into the shaft 23 through the air hose 27. To be done. Then
The compressed air is supplied from the circular hole 23a formed in the shaft 23 to the bag body 22.
It is jetted inside and the bag 22 is inflated as shown in FIG. As a result, the bag body 22 functions as a valve and the container 2
The closed space S surrounded by the pipe lining material 30 is airtightly divided into spaces S1 and S2, and both spaces S1 and S2 are sealed to prevent the compressed air in the space S1 from flowing out to the space S2 side.

Thereafter, while maintaining the above state, the divided piece 2C of the container 2 is separated from the divided pieces 2A and 2B, and the divided piece 2 is cut.
If a lid member (not shown) is attached to the opening end face of B, the space S
The inside of 1 is filled with compressed air and kept at a predetermined pressure, and the pipe lining material 30 is kept in a state of being pressed against the inner peripheral surface of the aged pipe. Then, while maintaining this state, the pipe lining material 30 is heated to cure the curable resin (thermosetting resin) impregnated therein, and the inner peripheral surface of the aged pipe is cured. It is lined with the material 30. still,
In FIG. 4, 29 is a rope attached to the end of the pipe lining material 30.

As described above, in this embodiment, the pipe lining material 30 includes the pair of deformable roller bags 19,
Since it is sequentially fed into the closed space S by passing through between 20, the change in the thickness of the pipe lining material 30 can be dealt with by changing the internal pressure of the roller bags 19, 20. For example, when the thickness of the pipe lining material 30 is increased, the compressed air in the roller bags 19 and 20 is evacuated by an appropriate amount to reduce the internal pressure of the roller bags 19 and 20, so that the roller bags 19 and 20 can be further improved. It is easily deformed, and the thick portion of the pipe lining material 30 easily passes between the roller bags 19 and 20 and is fed into the closed space S. Moreover, since the roller bags 19 and 20 rotate in contact with each other, their sealing performance is high, and the airtightness of the closed space S is kept high to facilitate the reversal of the pipe lining material 30.

Further, the reversing device 1 according to this embodiment reverses the pipe lining material 30 by the pressure of the compressed air while receiving the feeding action of the roller bags 19 and 20, and is lightweight. , 20 are used, they are small, compact, and light in weight, can be easily handled, and the reversing work can be efficiently performed.

As shown in FIG. 5, the roller bag 1
Another plurality (four in the illustrated example) of roller bags 19a, 20a are respectively housed in the insides of 9, 20 in the lengthwise direction, and the roller bags 19a, 20a are arranged like gear teeth as shown in the drawing. If the roller bags 19 and 20 are configured to be engaged with each other, the feeding action of the pipe lining material by the roller bags 19 and 20 is further enhanced.

[0029]

As is apparent from the above description, according to the present invention, a pair of roller bags, which are arranged in an airtight manner at one end opening of a container and are expanded by receiving a fluid pressure, are brought into contact with each other. Rotate in this state, pass the pipe lining material between these roller bags, fold the end of the pipe lining material that passed between both roller bags and fix it to the peripheral edge of the other end opening of the container, and compress the compressed gas in the container. Since the roller bag is rotated and the pipe lining material is sequentially inverted while being supplied, there is an effect that the pipe lining material can be inverted with good workability by a small, compact and lightweight device.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a reversing device according to the present invention.

FIG. 2 is a side sectional view of a reversing device according to the present invention.

FIG. 3 is a cutaway perspective view showing valve means of the reversing device according to the present invention.

FIG. 4 is a side sectional view of the reversing device showing the operation of the valve means.

FIG. 5 is a side sectional view of a roller bag showing a modified embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inversion device 2 Container 12 Drive motor (drive means) 19, 20 Roller bag 21 Valve means 30 Pipe lining material

Claims (4)

[Claims] 1. A pair of roller bags, which are arranged in an opening at one end of a container in an airtight manner and are expanded in response to the supply of fluid pressure, are rotated in contact with each other, and a pipe lining material is provided between the roller bags. , The end of the pipe lining material that has passed between both roller bags is folded back and fixed to the peripheral edge of the other end opening of the container, and while the compressed gas is being supplied into the container, the roller bag is rotated to make the pipe lining material. A method for reversing a pipe lining material, which comprises sequentially reversing. 2. A container having both ends opened, a pair of inflatable roller bags rotatably arranged in an airtight manner at one end opening of the container, and a driving means for rotationally driving the roller bag. A device for reversing a pipe lining material, comprising fluid pressure supply means for supplying fluid pressure into the roller bag and the container. 3. The container can be divided into a plurality of divided pieces, and has a valve means for sealing an opening of the divided piece by expanding by receiving a supply of a compressed gas. Item 2. The pipe lining material reversing device according to item 2. 4. The pipe lining material reversing device according to claim 2, wherein the roller bag is configured by accommodating a plurality of other roller bags in the lengthwise direction.