JP2802311B2 - Fluid circulator in rehabilitation repair method of existing piping - Google Patents

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 which is performed for the purpose of preserving the deterioration of existing pipes such as gas pipes. The present invention relates to a fluid circulating device used for circulation.

[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. Generally, lining technology is put to practical use as a rehabilitation repair technology for pipelines.For example, a lining method of drawing a flexible tube into a tube and attaching it to the inner surface of the tube is known. It has been put to practical use in actual pipelines as an effective repair technique for aging pipelines.

As one of the above-mentioned lining methods, an inverted lining method is known. In the inverted lining lining method, a flexible lining tube having an outer diameter substantially equal to the inner diameter of the pipe and in which an adhesive is sealed is introduced into the existing pipe while inverting the inner surface so that the inner surface becomes the outer surface. To adhere the lining tube to the inner surface of the existing piping.

Specifically, an adhesive is sealed in a flexible lining tube, one end of the lining tube is annularly fixed to one end of an existing pipe, and the annular portion is connected from the rear to the other end of the pipeline. Apply fluid pressure so as to pressurize, invert the lining tube in the existing pipeline so that the inside becomes outside at the folded portion formed in the annular portion, and turn the folded portion from one end of the pipeline along the pipeline. The lining tube is gradually advanced toward the other end, and the lining tube is pressed against the inner surface of the existing tube by a fluid pressure and an adhesive.

[0005] Thereafter, it is necessary to circulate a heating fluid in the lining tube which is reversely introduced into the existing pipe and is crimped to accelerate the curing of the adhesive. When the heating fluid is circulated through the lining tube in the tube, as a conventional method, as shown in FIG. The fluid in the lining tube 1 is stopped by keeping the wire 4 wound around and squeezing the wire 4 using the squeezing machine 2.

Next, the tip of the lining tube 1 is cut with scissors or the like. Thereafter, as shown in FIG. 2, a fluid circulation jig 8 is attached to the cutting portion 5. At that time, squeeze machine 10
Then, the fluid circulation jig 8 is fastened to the tube 1 with the wire 7. After attaching the fluid circulation jig 8, the squeeze machine 2 is operated to loosen the wire 4. When the valve 9 is opened, the heating fluid is introduced into the lining tube 1 via the jig 8 and can be circulated.

[0007]

However, the above-mentioned conventional method has several problems as described below. That is, the fluid in the lining tube 1 can be stopped by winding and tightening the wire 4 at one location of the lining tube 1 that has come out from the end of the existing pipe P via the protective material 3. Since the fluid pressure is still applied to the inside of the lining tube 1, the wire must be securely tightened to prevent the fluid from flowing out. Therefore, the work requires considerable skill.
Fluid often spurts due to incomplete tightening with wires.

The heating fluid is introduced into the lining tube 1 via the fluid circulation jig 8 and can be circulated. However, the tightening of the wire 7 is incomplete and the fluid tends to leak therefrom. Therefore, not only the pressure required for circulating the heating fluid is reduced, but also the working environment is likely to be hindered due to fluid leakage.

In addition, during the above-mentioned tightening operation, it is inevitable that an operator's hand touches the resin-based adhesive attached to the lining tube, so that there is a concern that it may adversely affect human health. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a heating fluid circulating device capable of easily switching the reversal lining from the introduction of a lining tube into the heating fluid is provided. It is intended to provide.

[0011]

In order to achieve the above-mentioned object, the present invention relates to a method in which a flexible lining tube having an outer diameter substantially equal to the inner diameter of a pipe and having an adhesive applied to the inner surface thereof is attached to an existing pipe. Introduced into the tube while inverting its inner surface to the outer surface by the fluid pressure from, and press the inner lining tube against the existing tube inner surface by the adhesive and the fluid pressure, then circulate the heating fluid in the lining tube In the rehabilitation repair method of the existing pipe, which promotes the curing of the adhesive by causing the heating fluid to circulate in the lining tube inverted and introduced into the pipe, a fluid circulating tool is installed at one end of the existing pipe. The fluid circulating device includes a cylindrical main body, a cap provided at an upper end of the main body, a fluid introduction portion mounted to communicate with the inside of the main body through a side wall of the main body, and a fluid circulating device formed inside a lower end of the cylindrical main body. A tubular projection having a diameter smaller than that of the main body, a socket portion screwed to a lower outer peripheral surface of the cylindrical main body, and a pipeline connection portion that can be connected to a pipeline through the socket portion. It is characterized by becoming.

Further, in the present invention, a ring-shaped groove is formed on an upper end surface of the cylindrical main body, and a ring-shaped sealing material is provided on an inner surface of the cap so as to be fitted into the ring-shaped groove. Is another feature.

Still another feature of the present invention is that a cutter is provided which can be inserted into the fluid introducing portion and protrude into the circulating device main body.

Another feature of the present invention is that a hole is formed in the inverted lining tube by projecting the cutter into the cylindrical main body.

Still another feature of the present invention is that a plurality of through holes are formed in a side wall of the socket portion.

Further, the present invention is characterized in that the conduit connecting portion has a reduced diameter portion having the same diameter as the small-diameter tubular projecting portion, and a flange portion is formed on an outer peripheral surface thereof. I do.

Further, according to the present invention, a flange portion is formed on the inner peripheral surface of the lower end of the socket portion, and the outer peripheral surface flange portion of the conduit connection portion is brought into contact with the flange portion. Is another feature.

Further, the present invention is characterized in that the lower end surface of the tubular protrusion is formed in a tapered shape and the upper end surface of the reduced diameter portion is formed in a concave tapered shape so that the lower end surface of the former can be sandwiched by the upper end surface of the latter. Another feature is that you have done it.

[0019]

According to the present invention constructed as described above, the fluid circulating device of the present invention is attached to the end of the existing pipe before the lining tube exits the end of the existing pipe. Thereafter, the end of the lining tube comes out of the end of the existing tube, passes through the pipe connection of the circulator and the small-diameter tubular protrusion, and is sealed in the closed space of the cylindrical main body. Next, by rotating the socket portion, the small-diameter tubular protrusion approaches the reduced-diameter portion of the conduit connection portion, and crushes the lining tube of the portion exposed between the two, so that the tubular protrusion is By preventing possible leakage between the inner surface and the outer surface of the tube, and by projecting a cutter provided so as to be able to penetrate the fluid introduction portion and protrude into the circulator body into the body, a hole is formed in the lining tube. Is opened to allow the heated fluid to flow into the lining tube via the fluid introduction portion and circulate.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is an exploded view of the fluid circulation device according to the present invention. As shown in FIG. 3, the fluid circulating device of the present invention has a cylindrical main body 22, and a cap portion 20 is provided at an upper end of the main body 22. A fluid inlet 24 is attached to the side wall of the main body 22 so as to communicate with the inside of the main body via the side wall.
A tubular projection 26 having a smaller diameter than the main body is formed inside the lower end of the cylindrical main body 22. Then, the cylindrical main body 22
The socket portion 30 is screwed to the lower outer peripheral surface of the connector. Before such screwing, the pipe line connecting portion 28 capable of connecting to a pipe line is inserted through the socket portion 30. I have.

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

Further, a cutter 25 is provided so that the fluid introduction part 24 can be inserted and protruded into the circulating device main body 22. The cutter 25 is rotated by grasping and rotating the rotating part 24a. A lining tube that can project into the interior and enters the cylindrical body 22 can be pierced.

The conduit connecting portion 28 has a reduced diameter portion 28b having the same diameter as the small diameter tubular projection 26, and has a flange portion 28c formed on the outer peripheral surface thereof. Further, the lower end surface of the tubular protrusion 26 is
a, the upper end surface of the reduced diameter portion 28b
As a, the lower end surface of the former can be sandwiched by the upper end surface of the latter.

A flange portion 30a is formed on the inner peripheral surface of the lower end of the socket portion 30, so that the outer peripheral surface flange portion 28c of the conduit connection portion 28 can be engaged with the inner peripheral surface flange portion 30a. ing.

FIG. 4 is a perspective view of the fluid circulation device in an assembled state. As shown in FIG. 4, in the circulating device after assembly, the cap portion 20 is screwed to the upper end portion of the cylindrical main body 22. The socket portion 3 is provided on the lower outer peripheral surface of the cylindrical main body 22.
No. 0 is screwed, and furthermore, the pipe line connecting portion 28 is mounted through the socket portion 30. At this time, the lower surface of the outer peripheral surface flange portion 28c of the pipeline connection portion 28 is in contact with the upper surface of the inner peripheral surface flange portion 30a of the socket portion 30.

A plurality of through-holes 30b are formed in the side wall of the socket portion 30, and it is determined whether or not the lining tube is securely sandwiched between the tubular projection 26 and the reduced diameter portion 28b. It is a confirmation window for confirmation.

Next, the use of the fluid circulation device of the present invention will be described. In the inverted lining lining method, a flexible lining tube having an outer diameter substantially equal to the inner diameter of the pipe and in which an adhesive is sealed is introduced into the existing pipe while inverting the inner surface so that the inner surface becomes the outer surface. To adhere the lining tube to the inner surface of the existing piping.

Specifically, the adhesive is sealed in a flexible lining tube, one end of the lining tube is fixed to one end of the existing pipe in an annular shape, and the annular portion is connected from the rear to the other end of the pipeline. The fluid pressure is applied so as to pressurize, and at the folded portion formed in the annular portion, the lining tube is turned inside the existing pipeline so that the inner side is outside, and the folded portion is formed along the pipeline. The lining tube is gradually advanced from the one end to the other end, and the lining tube is pressed into the existing tube by a fluid pressure and an adhesive.

Before the inverted liner tube 1 emerges from the end of the existing pipe P, a fluid circulator is attached to the end of the existing pipe P. At first, the pipe connecting portion 28 of the fluid circulating device is screwed and fixed to the end of the existing pipe P while being inserted into the socket portion 30. Then, lining tube 1
Comes out of the end of the existing pipe P, and the pipe connection 2
8, and is sealed in the closed space of the cylindrical main body 22 through the reduced diameter portion 28b and the small diameter tubular projection 26.

Next, by rotating the socket portion 30, the small-diameter tubular projection 26 approaches the reduced-diameter portion 28b of the conduit connection portion 28, and crushes the portion of the lining tube 1 exposed between them. Thus, the tubular protrusion 26
To prevent possible leakage between the inner surface of the tube and the outer surface of the tube 1. 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 portion 26.

After the fluid is shut off, the cutter 25 is projected into the cylindrical main 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 can flow into the lining tube 1 via the fluid introduction part 24 and circulate.

By circulating the heating fluid in the lining tube 1 which has been inverted and inserted 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.

[0033]

According to the present invention, the fluid circulating device of the present invention is attached to the end of the existing pipe before the lining tube exits the end of the existing pipe. Thereafter, the end of the lining tube comes out of the end of the existing tube, passes through the pipe connection of the circulator and the small-diameter tubular protrusion, and is sealed in the closed space of the cylindrical main body. Next, by rotating the socket portion, the small-diameter tubular protrusion approaches the reduced-diameter portion of the conduit connection portion,
The lining tube in the portion exposed between the two is crushed to prevent possible leakage between the inner surface of the tubular protrusion and the outer surface of the tube, and is inserted into the circulator body through the fluid introduction portion. By allowing the cutter provided to protrude into the interior of the main body, a hole is opened in the lining tube, so that the heating fluid can flow into the lining tube via the fluid introduction portion and circulate.

Therefore, when the reversal lining is switched from the inversion of the inner lining tube to the circulation of the heating fluid, the operation of switching between the two steps can be simplified, and the ejection of the fluid can be reliably avoided. In addition, since the switching work can be easily performed in this way, it is not necessary to touch the resin,
The efficiency of the reverse lining construction is also improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a conventional example.

FIG. 2 is an explanatory view showing a conventional fluid circulation jig.

FIG. 3 is an exploded view of the fluid circulation device of the present invention.

FIG. 4 is a perspective view of the fluid circulation device of the present invention in an assembled state.

FIG. 5 is an explanatory diagram when the fluid circulating device of the present invention is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 20 Cap part 22 Cylindrical main body 24 Fluid introduction part 26 Projection part of small diameter 28 Pipe connection part 30 Socket part

Claims (8)

(57) [Claims] 1. A flexible lining tube having an outer diameter substantially equal to the inner diameter of an existing pipe and having an adhesive applied to an inner surface thereof is inverted by a fluid pressure from the rear so that the inner surface becomes an outer surface. Introduced into the pipe, the adhesive and the fluid pressure are used to press the inner lining tube against the inner surface of the existing pipe, and then circulate a heating fluid in the lining tube to promote curing of the adhesive. When circulating the heating fluid in the lining tube inverted into the pipe, a fluid circulating tool is installed at one end of the existing pipe, and the fluid circulating tool is provided at the upper end of the main body. A cap, a fluid introduction portion mounted so as to communicate with the inside of the main body through a side wall of the main body, a tubular protrusion having a smaller diameter than the main body formed inside the lower end of the cylindrical main body, and a lower portion of the cylindrical main body. A fluid circulating tool in a rehabilitation repair method for an existing pipe, comprising: a socket portion screwed to a surface; and a pipeline connection portion that can be inserted into the socket portion and connected to a pipeline. . 2. A ring-shaped groove is formed on an upper end surface of the cylindrical body, and a ring-shaped sealing material is provided on an inner surface of the cap so as to be fitted into the ring-shaped groove. The fluid circulation device according to claim 1, wherein 3. The fluid circulating device according to claim 1, further comprising a cutter that can be inserted into the fluid introducing portion and protrude into the circulating device main body. 4. The fluid circulating device according to claim 3, wherein a hole is formed in the inverted lining tube by projecting the cutter into the cylindrical main body. 5. The circulating device according to claim 1, wherein a plurality of through holes are formed in a side wall of the socket portion. 6. The pipe connecting portion according to claim 1, wherein the pipe connecting portion has a reduced diameter portion having the same diameter as the small-diameter tubular projection portion, and a flange portion is formed on an outer peripheral surface thereof. Circulator. 7. A flange portion is formed on an inner peripheral surface of a lower end of the socket portion, and an outer peripheral surface flange portion of the conduit connection portion is brought into contact with the flange portion. The circulator according to claim 1 or 6, wherein 8. A lower end surface of the tubular projection is formed in a tapered shape, and an upper end surface of the reduced diameter portion is formed in a concave tapered shape.
The circulator according to claim 1, wherein the lower end surface of the former can be sandwiched between the upper end surfaces of the latter.