JP2858408B2 - Jig for repairing water leakage part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for repairing a leaked portion for repairing an uncured resin sheet such as an FRP sheet by pressing and curing the same when a leaked portion is formed in an existing tube. .

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional jig 11 for repairing a water leaking portion has a cylindrical crimping tube 12 having a uniform thickness.
Are fixed to a pair of closing plates 13a and 13b in an airtight state, respectively.

[0003] When repairing a water leaking portion 15 generated in an existing pipe 14, a water leaking portion repair jig 11 is disposed at a position facing the water leaking portion 15 in the pipe. An uncured FRP sheet 16 is first placed on the outer periphery of the crimping tube 12 of the water leak repair jig 11. And crimping tube 12
By introducing a pressurized fluid such as pressurized water into the inside, the crimping tube 12 is swollen in the pipe diameter direction from the state shown by the imaginary line in FIG. Pressure on the inner surface of the pipe
The repair is performed by curing the P sheet 16.

As shown in FIG. 4, the existing pipe 14 and F
Also when arranging the watertight rubber 17 between the RP sheets 16,
Watertight rubber 17 is arranged on the outer periphery of the FRP sheet 16 to perform repair similarly. Numeral 18 is a rubber lip protruding from both sides of the watertight rubber 17 in order to enhance the sealing performance.

[0005]

However, when an internal pressure is applied to the crimping tube 12 having a uniform thickness in which both ends are constrained in the above-mentioned repairing process, the unconstrained central portion in the axial direction of the tube as shown in FIG. The FRP sheet 16 which is bulged to the greatest extent and has the shape of a drum as a whole, and which is being stretched to be pressed against the inner surface of the tube, slides on the drum-shaped crimping tube 12 and easily moves. For this reason, the FRP sheet 16 may be crimped from a predetermined position, or may be displaced from a region where the crimping tube 12 can securely crimp, and may not be crimped properly, or the thickness of a finished sheet may vary. Or other problems.

As shown in FIG. 4, when the watertight rubber 17 is interposed, the rubber lip 18 of the watertight rubber 17 does not turn inward in the tube axis direction when the crimp tube 12 bulges like a drum. There is a possibility that the pipe may be crimped against the inner surface of the existing pipe 14 in a state where the pipe is turned outward, and the sealing performance may be significantly reduced.

SUMMARY OF THE INVENTION [0007] In view of the above-mentioned conventional problems, an object of the present invention is to provide a jig for repairing a water leakage portion which can securely press the FRP sheet closing the water leakage portion onto the inner surface of the existing pipe without displacing. I do.

[0008]

SUMMARY OF THE INVENTION A jig for repairing a water leaking portion of the present invention has a cylindrical shape which can be expanded in the radial direction of a tube for pressing and hardening an uncured resin sheet from the inside of a leaking portion of an existing tube. A crimping tube is provided, and a portion of the crimping tube where the resin sheet is crimped to the inner surface of the tube is thicker at a central portion in the tube axis direction than portions on both sides thereof.

[0009]

According to the present invention, in the portion of the crimping tube where the resin sheet is crimped to the inner surface of the tube, the thickness of the central portion in the tube axis direction is made thicker than the portions on both sides thereof. When a load is applied, the central portion of the tube in the axial direction does not become drum-shaped, but only swells in the radial direction of the tube with a cylindrical cross-sectional shape. The resin sheet can be securely pressed against the inner surface of the existing pipe without displacing the resin sheet by disposing and swelling the resin sheet.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, the water leakage repair jig 1 is configured by fixing both ends of a substantially cylindrical crimping tube 2 to a pair of closing plates 3a, 3b in an airtight state. The crimping tube 2 is made of an elastically extensible material such as rubber, and the central portion 4 in the tube axis direction is formed thicker than both side portions thereof. To give a specific example, a diameter of 10
In the case of the crimp tube 2 having a thickness of 00 mm and a thickness of 2 mm, the thickness of the central portion 4 is set to 4 mm. The width W of the central portion 4 in the pipe axis direction is F
The width is set to be slightly smaller than the width D of the RP sheet 7. That is, in the portion of the crimping tube 2 where the FRP sheet 7 is crimped to the inner surface of the existing pipe 5, the thickness of the central portion 4 in the tube axis direction is set to be thicker than the portions on both sides thereof.

In the above configuration, when repairing the water leaking portion 6 generated in the existing pipe 5, the jig 1 for repairing the water leaking portion is disposed at a position facing the water leaking portion 6 in the pipe. An uncured FRP sheet 7 is disposed on the outer periphery of the central portion 4 of the crimping tube 2 first. Then, by introducing pressurized water into the crimping tube 2 from the high-pressure water inlet provided in the closing plate 3a or 3b, the crimping tube 2 is turned from a state shown by an imaginary line in FIG. Bulge in the direction.

Since the central portion 4 of the crimping tube 2 in the tube axis direction is thicker than the both sides, the central portion 4 does not have a drum shape but has an initial cylindrical cross-sectional shape. Is swelled only in the radial direction of the tube without largely changing, and the portions near both sides swell slightly earlier. Here, since the width D of the FRP sheet 7 is slightly larger than the width W of the central part 4, the FRP sheet 7
Both sides of the sheet 7 are first pressed against the inner surface of the existing pipe 5 to
The RP sheet 7 is positioned, and subsequently, the entire central portion 4 is pressed substantially uniformly toward the inner surface of the existing pipe 5, so that the entire surface of the FRP sheet 7 is pressed substantially uniformly.

In this way, the entire surface of the FRP sheet 7 is pressed uniformly without covering the water leaking portion 6 without displacement, and the thickness of the finished product is varied by hardening the FRP sheet 7 in that state. It can be cured without performing and high quality repair can be performed.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, as shown in FIG.
The watertight rubber 8 is disposed between the existing pipe 5 and the FRP sheet 7, and the same reference numerals are given to the same components as those in the first embodiment, and description thereof will be omitted. Rubber lip portions 9 project obliquely outward from both sides of the watertight rubber 8 toward the inside in the pipe axis direction, so as to enhance the sealing performance. Then, the rubber lip 9 of the watertight rubber 8 is positioned near both sides of the central portion 4 of the crimp tube 2, and the FRP
Both sides of the seat 7 further extend to the sides.

In this embodiment, the FRP sheet 7 and the watertight rubber 8 are simultaneously pressed against the inner surface of the existing pipe 5 by expanding the pressure bonding tube 2 with the watertight rubber 8 arranged on the outer periphery of the FRP sheet 7 at the time of repair. . At this time, since the lip portions 9 of the watertight rubber 8 are located near both sides of the central portion 4, the rubber lip portions 9 are first pressed against the inner surface of the existing pipe 5. Therefore, the rubber lip 9 is turned over,
The high sealing performance of the watertight rubber 8 is reliably exhibited without the watertight rubber 8 being displaced.

[0016]

According to the present invention, as described above, the thickness of the central portion in the tube axis direction at the portion where the resin sheet of the crimping tube is pressed against the inner surface of the tube is made thicker than the portions on both sides thereof. When an internal pressure is applied to the crimping tube, the central portion in the tube axis direction swells almost uniformly in the tube radial direction without largely changing while maintaining the initial cylindrical cross-sectional shape. By arranging the uncured resin sheet on the outer periphery of the tube and swelling the resin sheet, the resin sheet can be securely pressed against the inner surface of the existing pipe without causing positional displacement.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a repaired state using a jig for repairing a water leakage part according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a repaired state by a jig for repairing a water leakage part according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a repaired state using a conventional water leaking portion repairing jig.

FIG. 4 is a cross-sectional view of a state of repair using another conventional example of a jig for repairing a water leakage portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Repairing jig for water leak part 2 Tube for crimping 4 Central part 5 Existing pipe 6 Water leak part 7 FRP sheet

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16L 55/16-55/18

Claims (1)

(57) [Claims] 1. A crimping tube having a cylindrical shape capable of swelling in the radial direction of a tube for press-curing and curing an uncured resin sheet from the inside of a tube at a water leaking portion of an existing tube .
At the part where the resin sheet to be
A jig for repairing a water leakage portion, wherein a thickness of a central portion in an axial direction is made thicker than portions on both sides thereof .