JPH10100254A - Fluid circulator in rehabilitation repair method of existing piping - Google Patents

Abstract

(57) [Summary] [Problem] Used for reversing lining construction of existing piping,
Provided is a fluid circulating device configured so that a liquid that has entered a tube fiber layer after inversion can be discharged to the outside. SOLUTION: The fluid circulating device of the present invention has a cylindrical body portion 2.
2 and a cap member 20 is provided at the upper end of the body 22. A fluid introducing portion 24 is mounted on a side wall of the body portion 22 so as to communicate with the inside of the body portion via the side wall. A tubular projecting member 26 having a smaller diameter than the body is formed inside the lower end of the cylindrical body 22. And
The socket member 30 is screwed onto the lower outer peripheral surface of the cylindrical body portion 22. Before such screwing, a pipe connection member 28 that can be connected to a pipe is inserted through the socket member 30. Keep it. Here, the pipe connection member 28 is formed to have a plurality of through holes 28d in the wall portion, and the liquid fluid that has entered the tube fiber layer after the inversion in the pipe is allowed to pass through these through holes 2d.
It can be discharged outside through 8d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is required for a reversing lining method for maintenance of existing pipes such as gas pipes, and is used when a heating fluid is circulated in a lining tube after the reversal of the pipe. Fluid circulation device to be used.

[0002]

2. Description of the Related Art Various techniques have been developed and proposed for a technique for rehabilitating and repairing existing pipes without digging while laying the existing pipes. A lining technique is generally used as a technique for rehabilitating and repairing existing piping. For example, a lining method is known in which a flexible tube is drawn into a pipe and attached to the inner surface of the pipe. At present, this method has already been put to practical use as an effective repair technique for aging existing pipelines.

[0003] As one of the above-mentioned lining methods, an inverted lining method is applied.
In the reversing lining method, as shown in FIG. 4, a flexible lining tube 1 having an outer diameter substantially equal to the inner diameter of the pipe and enclosing an adhesive is inverted with respect to the existing pipe P so that the inner surface becomes the outer surface. Then, the lining tube 1 is adhered to the inner surface of the existing pipe P with the adhesive.

As a specific method, an adhesive is first sealed in a flexible lining tube 1 in advance, and one end of the lining tube 1 is annularly fixed to one end (not shown) of an existing pipe P. Thereafter, a folded portion is formed in the tube 1, and fluid pressure is applied to the formed folded portion so as to press the other end of the conduit from the rear, and the inside of the lined tube 1 is turned so that the inner surface becomes the outer surface. To reverse.
In this way, the folded portion is gradually advanced from one end to the other end of the pipe along the inside of the pipe, and the lined tube 1 is pressed against the inner surface of the existing pipe P by the fluid pressure and the adhesive over the entire length of the existing pipe P.

[0005] As the lining tube 1 reverses, the distal end of the tube comes out of the other end P 'of the existing pipe P (Fig. 4). Thereafter, it is necessary to circulate the heating fluid to the lining tube crimped on the inner surface of the existing pipeline to promote curing of the adhesive. When circulating the heating fluid, a fluid circulating tool C (described in Japanese Patent Application No. 07-076622) is attached to the other end P ′ of the existing pipeline P, as shown in FIG. The fluid circulating device C is connected to the other end P ′ of the pipe before the tip of the inverted lining tube 1 comes out of the other end P ′ of the pipe for convenience in mounting.
Should be attached to.

[0006] Here, the fluid circulating device C includes a cylindrical body portion 22.
And a cap member 20 is provided at the upper end of the body 22. A fluid introducing portion 24 is mounted on a side wall of the body portion 22 so as to communicate with the inside of the body portion via the side wall. A small-diameter tubular projecting member 26 is formed inside the lower end of the cylindrical body 22. Then, the socket member 30 is screwed into the lower outer peripheral surface of the cylindrical body portion 22. Before such a screwing, the connecting portion 28 that can be connected to the pipeline is inserted through the socket member 30. I keep it. The connection portion 28 can be mounted in the socket member 30 by the flange portion (not shown) formed on the inner peripheral surface of the socket member 30 and the flange portion (not shown) formed on the outer peripheral surface of the connection portion 28. I have.

When the fluid circulator C is attached to the end P 'of the existing pipeline, the connecting portion 28 is screwed to the end P' of the existing pipe P in a state where the circulator C itself is assembled as shown in FIG. Let it stick together. Thereafter, the distal end of the lining tube 1 comes out from the other end P ′ of the existing pipe P, and
8b and the small-diameter tubular projecting member 26, it is sealed in the closed space of the cylindrical body 22.

Next, by rotating the socket member 30, the small-diameter tubular projecting member 26 approaches the reduced-diameter portion 28b of the connecting portion 28, and crushes the lining tube 1 in the portion exposed between the two. Thus, the fluid flowing between the inner wall surface of the tube and the tube 1 through the gap between the inner surface of the tubular projecting member 26 and the outer surface of the tube 1 can be stopped. In the drawing, reference numeral 1a shows the lining tube 1 at a portion sandwiched between the reduced diameter portion 28b and the tubular projecting member 26.

After the fluid is cut off, the cutter 25 is projected into the cylindrical body 22 by grasping and rotating the rotating portion 24a, and a hole is formed in the lining tube 1. Thereafter, when the valve 27 is opened, the heating fluid L (usually a liquid fluid) can flow into the lining tube 1 via the fluid introduction part 24 and circulate.

[0010] By circulating the heating fluid in the lining tube 1 inverted into the existing pipe P, the curing of the adhesive is promoted, and the adhesion between the lining tube 1 and the inner wall of the existing pipe P is ensured. The quality of the reversing lining construction is ensured.

[0011]

However, the above-described fluid circulating device used for circulating the heating fluid in the lining tube after the inversion in the tube has the following problems.

That is, the lining tube 1 is composed of a plastic layer and a fiber layer, and after being reversely introduced into the existing pipeline P, the plastic layer becomes the inner surface of the tube 1 and the fiber layer becomes the outer surface of the tube 1. ing. Since a liquid fluid is used during the above operation, such a liquid fluid is likely to penetrate into the fiber layer, and the space between the outer surface of the tube 1 and the inner surface of the existing pipeline P along the fiber layer. It is flowing.

Since the fluid circulating device C shown in FIG. 5 has no means for releasing the liquid fluid that has entered the fiber layer of the tube 1, the liquid fluid that has entered the fiber layer of the tube 1 remains in the fiber layer as it is. Will be. Therefore, the adhesive between the outer surface of the lining tube 1 and the inner surface of the existing pipeline P is affected by the liquid fluid that has penetrated the fiber layer, so that the adhesion between the outer surface of the lining tube 1 and the inner surface of the existing pipeline P is reduced. It may not be possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is used for reverse lining of existing pipes so that a liquid which has entered a tube fiber layer after reverse can be discharged to the outside. An object of the present invention is to provide a fluid circulating device configured.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a method of reversing a flexible lining tube in a pipeline from one end opening of an existing pipeline buried underground. Introducing, a fluid circulating tool in a rehabilitation repair method for an existing pipe in which an adhesive interposed between the tube and the pipe inner wall surface is cured and the tube is adhered to the pipe inner surface, wherein the fluid circulating tool is a cylinder. A body part, a cap member attached to one end opening of the body part, a fluid introduction part penetrating through a side wall of the body part, and an inner peripheral surface on the other end side of the body part. A tubular protruding member disposed so as to protrude from the other end opening of the body portion, a socket member screwed to the outer peripheral surface on the other end side of the body portion, and a pipe passing through the socket member. With multiple through holes on the side And characterized by having a connection member.

Further, a thermal drilling machine for drilling a hole in a tube is provided in the fluid introducing section.

[0017]

According to the present invention constructed as described above, the fluid circulating device is attached to the end of the existing pipe before the lining tube comes out of the end of the existing pipe. Thereafter, the tip of the lining tube comes out of the end of the existing tube, passes through the pipe connecting member of the circulating device and the small-diameter tubular projecting member, and is sealed in the closed space of the cylindrical body. Next, by rotating the socket member, the small-diameter tubular protruding member approaches the reduced-diameter portion of the conduit connecting member, and crushes the lining tube of a portion exposed between the two, thereby forming the tubular protruding member. By preventing possible fluid leakage between the inner surface and the outer surface of the tube, and by projecting a boring machine, which is provided so as to be able to penetrate through the fluid introduction portion and protrude into the circulating device body portion, into the body portion, A hole is formed in the lining tube, so that the heating fluid can flow into the lining tube through the hole and circulate through the fluid introduction portion.

Here, since the pipe connecting member is formed with a plurality of through holes in the wall, the liquid fluid which has entered the fiber layer of the tube which is the outer surface after the inversion of the pipe is introduced. Since it can be discharged to the outside through the hole, there is no danger that the adhesiveness between the outer surface of the lining tube 1 and the inner surface of the existing pipeline P will be deteriorated.

According to the second aspect of the present invention, since the drilling machine is of a thermal type, it is possible to accurately and easily drill a hole in the tube, thereby preventing the sandwiched tube from falling off. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded view of the fluid circulation device according to the present invention. As shown in FIG. 1, the fluid circulating device of the present invention has a cylindrical body 22, and a cap member 20 is provided at an upper end of the body 22. On the side wall of the body part 22,
A fluid introduction unit 24 is mounted so as to communicate with the inside of the body via the side wall. A tubular projecting member 26 having a smaller diameter than the body is formed inside the lower end of the cylindrical body 22. Then, the socket member 30 is screwed to the lower outer peripheral surface of the cylindrical body portion 22. Before such a screwing, the pipe connection member 28 connectable to the pipe is attached to the socket member 30. Insert it.

A ring-shaped groove 22a is formed on the upper end surface of the cylindrical body portion 22, and a ring-shaped sealing material 20a is provided on the inner surface of the cap member 20 so as to be fitted into the ring-shaped groove 22a. I have. Thereby, the sealing property between the cap member 20 and the cylindrical body portion 22 can be reliably ensured.

Further, a thermal drilling machine 25 is inserted so that the fluid introducing portion 24 can be inserted into the circulating device body 22 to project therethrough.
Is established. The thermal drilling machine 25 is configured so that the cutting edge is heated by being supplied with power from a power source such as a battery (not shown). Then, by pressing the rotating part 24a, the drilling machine 25 is moved to the cylindrical body part 22.
And a hole can be formed in the lining tube 1 contained in the cylindrical body portion 22.

The conduit connecting member 28 has a reduced diameter portion 28b having the same diameter as the small diameter tubular projecting member 26, and has a flange portion 28c formed on the outer peripheral surface thereof. Further, the lower end surface of the tubular projecting member 26 is formed as a projecting taper 26a, and the upper end surface of the reduced diameter portion 28b is formed as a concave taper 28a, so that the lower end surface of the former can be sandwiched between the upper end surfaces of the latter.

Here, as shown in FIG. 1, the conduit connecting member 28 is formed with a plurality of through holes 28d in the wall. Tubes 1 to be described later are formed by these through holes 28d.
The liquid fluid that has entered the fiber layer can be discharged from the fiber layer to the outside of the tube.

A flange 30a is formed on the inner peripheral surface of the lower end of the socket member 30, and
Eight flange portions 28c can be engaged with and brought into contact with the flange portions 30a.

FIG. 2 is a perspective view of the fluid circulating device in an assembled state. As shown in FIG. 2, in the circulating device after assembly, the cap member 20 is screwed to the upper end of the cylindrical body 22. A socket member 30 is screwed onto a lower outer peripheral surface of the cylindrical body portion 22.
0, the pipe connecting member 28 is mounted.
At this time, the lower surface of the flange portion 28c of the conduit connection member 28 is in contact with the upper surface of the flange portion 30a of the socket member 30.

A plurality of through holes 30b are formed in the side wall of the socket member 30 so that the tubular projecting member 26
It is a confirmation window for confirming whether or not the lining tube is securely sandwiched between the inner diameter tube and the reduced diameter portion 28b.

Next, the use of the fluid circulation device of the present invention will be described. In the inverted lining method, the existing pipe P
In contrast, a flexible lining tube 1 having an outer diameter substantially equal to the inner diameter of the tube and enclosing an adhesive is introduced into the tube while inverting the inner surface of the tube so that the inner surface becomes the outer surface. Adhere to the inner surface of P.

Specifically, first, an adhesive is sealed in the flexible lining tube 1 in advance, and one end of the lining tube 1 is folded back to one end (not shown) of the existing pipe P and fixed. Then, a suction pump is connected to the other end of the pipe, a negative pressure is generated in the pipe, and the lining tube 1 is reversed and introduced into the pipe. Then, the lining tube 1 is adhered to the inner surface of the existing pipe P over the entire length of the existing pipe P with an adhesive.

Before the inverted lining tube 1 comes out of the other end P ′ of the existing pipe P (FIG. 3), the fluid circulating device is moved to the existing pipe P.
Attached to the end. At the time of attachment, first, while the pipe connection member 28 of the fluid circulation tool is inserted through the socket member 30, the connection portion 28 is screwed and fixed to the end P 'of the existing pipe P. Thereafter, the distal end portion of the lining tube 1 comes out from the other end portion P ′ of the existing pipe P, passes through the reduced diameter portion 28b of the conduit connection member 28 and the small-diameter tubular projecting member 26, and becomes a cylindrical body portion. 22.

Next, by rotating the socket member 30, the small-diameter tubular projecting member 26 is connected to the conduit connecting member 2.
8 and closes the lining tube 1 in a portion exposed between them to prevent fluid leakage that may occur between the inner surface of the tubular projecting member 26 and the outer surface of the tube 1. In the drawing, reference numeral 1a denotes a portion of the lining tube 1 sandwiched between the reduced diameter portion 28b and the tubular projecting member 26.
Is shown.

After the fluid is shut off, the drilling machine 25 is protruded into the cylindrical body part 22 by pushing the rotating part 24a, thereby making a hole in the lining tube 1. Then, valve 2
7 is opened, the heating fluid L passes through the fluid introduction portion 24,
It can flow into the lining tube 1 and be circulated.

By circulating the heating fluid in the lining tube 1 which has been inverted into the existing pipe P, the curing of the adhesive is promoted, and the adhesion between the lining tube 1 and the inner wall of the existing pipe P is ensured. The quality of the reversing lining construction is improved.

Here, as shown in FIG.
8 is screwed and joined to the other end P ′ of the existing pipe P, but there is a small gap between the open end face of the existing pipe P and the lower end face of the reduced diameter portion 28b. The outer surface of the tube after inversion is a water-absorbing fiber layer, and the liquid fluid entering the fiber layer flows along the fiber layer by the pressure of the heating fluid circulating in the tube after inversion. . The liquid fluid flowing in such a manner passes through a gap remaining between the opening end face of the existing pipe P and the lower end face of the reduced diameter portion 28b, and from a plurality of through holes 28d formed in the pipe connection member 28, It is designed to be discharged outside.

As described above, since the fluid circulating device C has the through hole 28d for letting out the liquid fluid that has entered the fiber layer of the tube 1, the liquid fluid that has entered the fiber layer of the tube 1 remains in the fiber layer. Disappears. Therefore, the adhesiveness between the outer surface of the lining tube 1 and the inner surface of the existing pipeline P is not likely to be deteriorated by the influence of the liquid fluid that has penetrated into the fiber layer. Adhesion between the outer surface and the inner surface of the existing pipeline P is of good quality.

[0036]

According to the present invention constructed as described above, since the pipe connecting member of the fluid circulating device is formed with a plurality of through holes in the wall, the outer surface after the inversion in the pipe is introduced. The liquid fluid that has entered the fiber layer of the tube
Since it can be discharged to the outside through these through holes, there is no danger that the adhesiveness between the outer surface of the lining tube and the inner surface of the existing pipeline will deteriorate. Therefore, by circulating the heating fluid in the lining tube reversely introduced into the existing pipe, the bonding between the outer surface of the lining tube and the inner surface of the existing pipeline becomes of good quality, and the quality of the inverted lining lining construction is improved. You.

In addition, since a thermal drilling machine for drilling a hole in the tube is provided in the fluid introducing section, the hole can be easily and reliably drilled in the tube. The accuracy of construction is improved.
Further, since the hole is opened only by pushing the thermal drilling machine, the working labor can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded view of a fluid circulation device according to the present invention.

FIG. 2 is a perspective view of the fluid circulation device of the present invention in an assembled state.

FIG. 3 is a perspective view of the fluid circulation device of the present invention, showing a state where the fluid circulation device is mounted on an existing pipeline.

FIG. 4 is an explanatory view showing a reverse lining method.

FIG. 5 is a perspective view of a conventional fluid circulating device in a state where the fluid circulating device is mounted on an existing pipeline.

[Explanation of symbols]

 P Existing piping P 'Other end of piping C Fluid circulating device 1 Lined tube 1a Portion of lined tube 20 Cap member 22 Cylindrical body 24 Fluid introduction unit 24a Rotating unit 25 Drilling machine 26 Tubular projecting member 27 Valve 28 Connection part 28b Reduced diameter part 28d Through hole 30 Socket member

Claims (2)

[Claims] 1. A flexible lining tube is introduced into a pipeline from an opening at one end of an existing pipeline buried underground while being inverted, and is interposed between the tube and an inner wall surface of the pipeline. In a fluid circulating device in an existing pipe rehabilitation repair method of curing an adhesive and attaching a tube to an inner surface of a pipeline, the fluid circulating device is attached to a cylindrical body portion and an opening at one end of the body portion. A fluid introduction portion provided through the side wall of the body portion, and a fluid introduction portion connected to the inner peripheral surface on the other end side of the body portion, and disposed so as to protrude from the other end opening of the body portion. A tubular projecting member, a socket member screwed to the outer peripheral surface on the other end side of the body portion, and a pipe having a plurality of through-holes on a side surface, through which the socket member can be inserted and connected to a pipeline. Road connecting member, and Fluid circulator in rehabilitation repair method. 2. The fluid circulating tool according to claim 1, wherein a thermal drilling machine for drilling a hole in the tube is provided in the fluid introducing section.