JPH0822572B2 - Pipe line lining method and lining material terminal fixing member and device used therefor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas conduit, a water pipe, etc., which is mainly used for lining a pipe buried in the ground when working from only one end of the pipe. TECHNICAL FIELD The present invention relates to a method, a fixing member, and a device for fixing a tip of a lining material at a tip of a tube to the tube.

Generally, as a method of lining the underground buried pipeline, insert a flexible tubular lining material with pressure fluid while turning it inside out and insert the inside lining material with pressure fluid onto the inner surface of the pipeline by crimping. The method is known.

However, this method requires opening both ends of the conduit to be lined. For a long pipeline of several hundred meters, it is not necessary to dig up over the entire length, and it is a great advantage that it is sufficient to open both ends, but it is several meters.
A short tube does not provide any advantage, but rather a disadvantage.

An example of such a short pipe is a drain pipe in a gas conduit. FIG. 7 shows the situation of laying the drainage pipe, in which a water reservoir 2 is connected in the middle of the gas conduit 1, and the liquid content (condensed water vapor etc. contained in the city gas) Water is mainly collected.
A drainage pipe 3 is provided upright through the upper part of the water storage container 2, and an upper end of the drainage pipe 3 is opened in a pit 4 formed on the ground and is closed by a lid 5. The lower end of the drainage pipe 3 reaches the bottom of the water reservoir container 2.

Then, the lid 5 is periodically removed to suck and drain the water accumulated in the water reservoir 2 from the drain pipe 3.

By the way, when such a drainage pipe 3 is lined, it is necessary to work from the opening at the upper end of the drainage pipe 3 to line the drainage pipe 3, but the lower end of the drainage pipe 3 cannot be treated in any way. . If some treatment is to be performed at the lower end of the drainage pipe 3, that portion must be dug up to stop the gas supply and open the water reservoir container 2. If you do that, replacing the drainage pipe 3 is much easier and quicker,
It is economical.

Therefore, in such a drainage pipe 3, the advantage of opening only both ends is not recognized, and it is required to line the drainage pipe 3 only by the work of the opening in the pit 4.

Thus, if it is attempted to line the drainage pipe 3 only by the work in the opening in the pit 4, the tip of the lining material is moved to the tip of the drainage pipe 3 (in the water storage container 2) only by the operation from the opening. It requires special methods and equipment to secure it to the end).

2. Description of the Related Art In particular, as a means for lining such a drainage pipe, there is the invention of Japanese Patent Application No. 62-137473 filed by the applicant earlier. This invention fits a pair of rings inside and outside of one end of the lining material to sandwich the one end of the lining material, and to fit an expanding tool inside the inner ring,
While inserting the lining material from the open end of the pipe while turning it over and lining it, the one end of the lining material is positioned at the tip of the pipe, and the expanding tool is expanded there to expand the ring, The one end portion of the lining material is fixed to the inner surface of the pipe via the above.

Problems to be Solved by the Invention However, in many drainage pipes, the upper end and the lower end generally have different diameters. Normally, the upper end has an inner diameter of about 20 mm, but the lower end has an inner diameter of about 25 mm, and the lower end has a large diameter.

However, in the above method, the ring fitted to the lining material has to pass through the minimum inner diameter portion of the pipe, so that the outer diameter thereof is restricted and the ring is expanded to a state in which it can be pressed against the large diameter portion at the lower end portion of the pipe. Must be opened. It is extremely difficult to expand the metal ring to such an extent without breaking or reducing the strength, and the above-mentioned method can be applied to only limited objects.

Further, as a material in which a slit is formed in a cylindrical member to facilitate expansion, there is one described in JP-A-61-82092. However, in this case, the cylindrical member divided by the slit is expanded and expanded by the expanding pressure from the inside, so if the expanding pressure is removed, the cylindrical member itself becomes permanent. Cannot be kept in the expanded state. Therefore, it can only be used as a temporary means for expanding the repair sleeve and has to be removed from the tube afterwards.

The present invention has been made in view of the above circumstances, and it is possible to process the tip portion of the lining material at the other end of the pipe only by the work at the opening portion of the pipe, and to follow a large fluctuation of the pipe diameter. It is an object of the present invention to provide a method, a fixing member, and a device that can be used, especially suitable for lining the drainage pipe.

Means for Solving the Problems Thus, the invention of the present method provides a fixing member formed by splitting one end of a tubular body having an outer diameter smaller than the minimum inner diameter of the pipe into a plurality of split pieces at the tip of the lining material. After fitting, inserting the lining material into the pipe and crimping to the inner surface thereof, the split piece of the fixing member is expanded outward, and the lining sandwiching pressure is applied between the split piece and the pipe inner surface. According to the invention of the fixing member, one end portion of the tubular body having an outer diameter smaller than the minimum inner diameter of the tube is formed with a thick portion in which the inner diameter is expanded to reduce the inner diameter. , Splitting the thick portion in the axial direction to form a plurality of split pieces,
Further, the invention of the device comprises a cylindrical cylinder having a bottom, and a piston slidably fitted to the cylinder by fluid pressure and constantly biased in the backward direction, and fixed to the tip of the cylinder. It is characterized in that a fitting portion for fitting a member is formed, and a tapered tapered widened portion is formed at a tip end portion of a piston protruding from a tip end of a cylinder.

FIG. 6 shows a state in which the water draining pipe 3 is lined. A shutter 7 is connected to the upper end of the drainage pipe 3 via a mechanical socket 6, and an upper end of the shutter 7 is connected to a lining material terminal fixing metal fitting 8. Then, on the fixing portion 9 of the lining material terminal fixing metal fitting 8,
The end of the lining material 10 is fixed in a ring shape. Further, on the upper portion of the lining material terminal fixing fitting 8, a cylindrical liquid injection container 11
Are joined together and contain a liquid 12 such as water.

An instrument 13 is attached to one end of the lining material 10, and the other end is fixed to the fixing portion 9 in an annular shape.

The lining material 10 is turned upside down by the head pressure of the liquid 12 in the liquid injection container 11 so that the inner side is the outer side at the folded portion 14 formed in the annular fixed portion. Then, while the lining material 10 is turned over at the turning portion 14, the turning portion 14 descends along the drainage pipe 3, and the insider material 10 which has been turned over is pressure-bonded to the inner surface of the drainage pipe 3 by the head pressure of the liquid 12. To be done.

As the lining material 10 is turned inside out, the liquid 12 is replenished in the liquid injection container 11, and the pressure for turning over the lining material 10 is maintained.

When the lining material 10 is inserted inside the water draining pipe 3 while being turned over, the instrument 13 attached to the one end of the lining material 10 is also drawn into the water draining pipe 3 along with it, so that the lining material 10 becomes full length. When turned over, the device 13 is positioned at the other end of the drainage pipe 3.

This state is shown in FIG. 1 together with the structure of the device 13.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a drawing showing a usage state of the device 13 of the present invention. Reference numeral 15 denotes a cylindrical cylinder having a bottom, a through hole 16 is formed in the bottom portion thereof, and a hydraulic hose 17 is coupled to the inner surface of the through hole 16.

A fitting portion 18 of a fixing member, which will be described later, is formed on the outer periphery of the tip of the cylinder 15. A plurality of through holes 19 are formed in the fitting portion 18, and the metal balls 20 are provided in the through holes 19.
The metal balls 20 can be slid inward and outward along the through hole 19. Reference numeral 21 is an O-ring fitted in the fitting portion 18.

22 is a piston. The piston 22 has a sliding portion 24 at a rear end portion of a main body portion 23 that slides in close contact with the cylinder 15, and an O ring 25 is fitted to the sliding portion 24. Further, a small diameter portion 27 is formed at the tip end portion of the main body portion 23 via a step portion 26, and a tapered taper-shaped pressure expanding portion 28 is formed at the tip end of the small diameter portion 27. Part 28 is a cylinder
It projects from the tip of 15. The piston 22 is slidable with respect to the cylinder 15, and is constantly urged by the spring 29 in the backward direction. A communication hole 30 is formed from the outer periphery of the rear portion of the main body 23 of the piston 22 to the tip of the pressure expanding portion 28.

31 is a fixing member of the present invention. The fixing member 31 is a metal cylindrical body 32 having a diameter smaller than the minimum inner diameter of the drainage pipe 3, and the tip end portion thereof has a thickened portion 33 with an inwardly increasing wall thickness. It is smaller than the outer diameter of the pressure expanding portion 28 in the device 13. The thick portion 33 is split by the radial slits 34 and divided into a plurality of split pieces 35.

Further, the inner surface of the rear portion of the fixing member 31 is adapted to be fitted into the fitting portion 18 of the cylinder 15 of the device 13, and the concave groove 36 is formed in the inner periphery thereof.

Operation Next, the procedure for using this device will be described, and an example of the method of the present invention will be described.

First, one end of the lining material 10 is connected to the fixing portion 9, the other end is passed through the circular ring 39, and the tip end thereof is covered with the fixing member 31 having the seal member 37 adhered to the opening of the tip end from the tip thereof, and heat shrinking is performed. Secure with tube 38.

In this state, the reaction-curing adhesive is applied to the inner surface of the lining material 10. At this time, the seal member 37 prevents the adhesive from entering the fixing member 31.

The fixing member 31 is then coupled to the device 13. Instrument at this time
Since the piston 22 in 13 is retracted, the metal ball 20 is at the position of the small diameter portion 27 of the piston 22, and the metal ball 20 has a through hole 19
It is possible to move inward, and the fixing member 31
Can be fitted.

In this state, if low pressure oil pressure is applied from the hydraulic hose 17,
The piston 22 slides slightly forward, and the main body 23 causes a metal ball.
20 is pushed outward and locked in the groove 36 of the fixing member 31, and the fixing member 31 is fixed to the device 13. In addition, the pressure expansion part of the piston 22
28 contacts the thick portion 33 of the fixing member 31 to stop sliding.

Next, the liquid 12 is injected into the liquid injection container 11, and the lining material 10 is turned over by the pressure of the liquid 12 and is inserted into the drainage pipe 3,
The inner surface of the drainage pipe 3 is pressure-bonded with an adhesive.

Thus, FIG. 1 shows a state in which the lining material 10 is turned upside down and crimped to the inner surface of the drainage pipe 3, and the device 13 is the drainage pipe 3
Has reached the lower end of. And the device 13 and the fixing member 31
Is loosely fitted to the inner surface of the lining material 10 which is pressure-bonded to the inner surface of the drainage pipe 3. Further, the circular ring 39 is provided in the folded portion 14, and the circular ring 39 is locked to the fixing member 31 to prevent the inner lining material 10 from being turned over further.

In this state, pressure oil is press-fitted from the hydraulic hose 17, and when hydraulic pressure is applied between the bottom surface of the cylinder 15 and the rear end surface of the piston 22, the elastic force of the spring 29 is compressed, and the piston 22 moves against the cylinder 15. It slides downward in the figure. Then spring
The air in the portion 29 is discharged from the tip of the pressure expanding portion 28 through the communication hole 30. Therefore, the pressure expanding portion 28 also moves downward, and the tapered surface thereof pushes the thick portion 33 of the split piece 35 outwardly, so that each split piece 35
As shown in FIG. 3, the thick portion 33 is bent outward from the root of the thick portion 33. As a result, the split piece 35 is pressed against the drainage pipe 3 via the lining material 10, and the lining material 10 is clamped and fixed between the split piece 35 of the fixing member 31 and the inner surface of the drainage pipe 3.

Further, the expanding portion 28 moves downward while expanding the thick portion 33 of the fixing member 31, thereby breaking through the seal member 37 and opening the front end opening portion of the fixing member 31.

In this state, the liquid 12 is circulated while being replaced with warm water to cure the adhesive between the lining material 10 and the drainage pipe 3 and bond the lining material 10 to the drainage pipe 3.

Furthermore, the liquid 12 in the lining material 10 is discharged, and the cylinder 15
By removing the hydraulic pressure between the bottom surface and the rear end surface of the piston 22,
By the elastic force of the spring 29, the piston 22 moves upward with respect to the cylinder 15, and the small diameter portion 27 comes to the position of the metal ball 20,
The metal ball 20 can be moved inward and escape from the groove 36. If the device 13 is pulled up here, the device 13 can be taken out with the fixing member 31 remaining at the tip of the drainage pipe 3. This state is shown in FIG.

After the device 13 is taken out, the end of the lining material 10 is expanded by the fixing member 31 and fixed to the drainage pipe 3,
There is no possibility that the water will be peeled off from the drain pipe 3 or that water or the like will not enter between the lining material 10 and the drain pipe 3.

EFFECTS OF THE INVENTION According to the present invention, for a pipe buried in the ground, if only one end thereof is open, after lining the pipe, the other end of the lining is treated, and It is possible to effectively prevent peeling from the inner surface of the pipe and intrusion of water or the like. It is therefore very suitable for application on relatively short, straight, small diameter pipes, such as drainage pipes in gas conduits.

Further, according to the present invention, since the distal end portion of the fixing member 31 is split to form the split piece 35, the split piece 35 is formed into the thick wall portion.
The diameter can be greatly expanded by bending outward from the root of 33. Further, in the fixing member 31 of the present invention, since the cylindrical body 32 itself is not expanded by expanding its diameter, the expanded portion is expanded without being contracted by the elasticity of the cylindrical body 32. The splitting piece 35 allows the lining material to be permanently pressed and fixed.

Therefore, even when the diameter of the pipe is largely changed like the general drainage pipe 3, the outer diameter of the fixing member 31 is made sufficiently smaller than the minimum inner diameter, and larger than that. Even in the portion having a very large inner diameter, the diameter can be expanded to that extent, and the lining material 10 can be reliably fixed.

The present invention is not limited to the drainage pipe 3 but can be widely applied to various pipes.
Also, by appropriately changing the design, it is possible to apply to long pipes such as gas pipes and water pipes.

[Brief description of drawings]

1 to 5 are views showing the usage state of the device and the fixing member of the present invention, and FIGS. 1 and 2 are central longitudinal sectional views and II before the fixing member is expanded. -II sectional view, FIG. 3 and FIG. 4 are a central longitudinal sectional view and IV-IV sectional view in a state where the fixing member is expanded, and FIG. 5 is a central state in which the device is removed from the fixing member. FIG. FIG. 6 is a central vertical cross-sectional view showing a state of being lined with a drainage pipe, and FIG. 7 is a central vertical cross-sectional view showing a laid state of the drainage pipe. 3 …… pipe, 10 …… lining material 13 …… equipment, 15 …… cylinder 18 …… fitting part, 22 …… piston 28 …… pressure expanding part, 31 …… fixing member 32 …… cylindrical body, 33… … Thick part 35… Splitting piece, 39… Circular ring

Claims (4)

[Claims] 1. The tip of the lining material (10) is provided at one end of a tubular body (32) having an outer diameter smaller than the minimum inner diameter of the pipe (3),
A thick portion (33) is formed by expanding the thickness inward to reduce the inner diameter, and the thick portion (33) is split in the cylinder length direction to form a plurality of split pieces (35). After fitting the fixing member (31), the lining material (10) is inserted into the pipe (3) and pressure-bonded to the inner surface thereof, the split piece (3) of the fixing member (31).
Bend 5) outward from the root of the thick part (33),
Between the split piece (35) and the inner surface of the pipe (3), a lining material (1
Method for lining pipes, characterized by pinching and fixing the tip of (0) 2. The tip of the lining material (10) is provided at one end of a tubular body (32) having an outer diameter smaller than the minimum inner diameter of the pipe (3),
A thick portion (33) is formed by expanding the thickness inward to reduce the inner diameter, and the thick portion (33) is split in the cylinder length direction to form a plurality of split pieces (35). A fixing member (31) formed by fitting the rear end of the lining material (10) through a circular ring (39) having an inner diameter smaller than the outer diameter of the tubular body (32),
The lining material (10) is inserted from the open end of the pipe (3) while turning it over from the rear end in order, and the circular ring (39) is fixed to the fixing member (3) at the tip of the lining material (10).
After locking the lining material (10) inside out by stopping the lining material (10) by crimping the lining material (10) to the inner surface of the pipe (3), the split piece (35) of the fixing member (31) is The thick part (33) is bent outward from the root of the thick part (33), and the tip of the lining material (10) is clamped and fixed between the split piece (35) and the inner surface of the pipe (3). How to line the pipe 3. A thick wall portion (33) having an inner diameter reduced at one end of a tubular body (32) having an outer diameter smaller than the minimum inner diameter of the pipe (3) to reduce the inner diameter. And a plurality of split pieces (35) are formed by splitting the thick portion (33) in the cylinder length direction, and a fixing member for a terminal of an inner lining material used for lining a pipe. 4. A cylinder (15) having a bottomed cylindrical shape, and a piston (22) slidably fitted to the cylinder (15) by fluid pressure and constantly biased in a backward direction. , A fitting portion (18) for fitting the fixing member (31) is formed at the tip of the cylinder (15), and the cylinder (1
5) The tip of the piston (22) protruding from the tip of
Fixing device for end of lining material used for lining pipe, characterized by forming tapered taper-shaped widened portion (28)