JPH1068493A - In-pipe repairer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-pipe repairer in which such a fact of nonconformity that a thermosetting adhesive lying in and around a border line between a rubber sleeve and a branch pipe sleeve has been scraped off due to friction between a pipe and an inner wall will in no case occur. SOLUTION: A border line 12 to be attached tight after a rubber sleeve 3 and a branch pipe sleeve 11 are superposed on each other is made up into an elliptic form being long in the axial direction of the rubber sleeve 3. Accordingly, since the border line 12 is situated side a recess 3A being formed on upper part of the rubber sleeve 3 in a state that the branch pipe sleeve 11 is contracted, such a problem that both radial symmetrical sizes enlarge can be prevented. Therefore, such nonconformity that a thermosetting adhesive lying in and around this border line 12 is scraped off due to friction between a pipe 7 and an inner wall is thus prevented too.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an in-pipe repair machine capable of repairing pipes such as sewers buried underground from inside.

[0002]

2. Description of the Related Art Conventionally, ceramic pipes, concrete fume pipes, and PVC pipes made of synthetic resin have been used for pipes such as sewer main pipes buried underground, but these pipes are aging. Cracking, breakage, and separation of joints will occur due to cracking, subsidence of ground, and fluctuations in ground pressure.

[0003] When repairing such a faulty part, for example, using an elastic repairing material obtained by laminating a glass cloth and a nonwoven fabric, the repairing material is wound around the pipe, and the in-pipe repairing machine is temporarily fixed to the pipe from the manhole. A repair construction method called the FRP method has been developed, in which the adhesive is applied to the inner peripheral surface of the failed part using an adhesive.

FIG. 9 shows an external view of a conventional in-pipe repair machine.

[0005] The in-pipe repair machine 101 is provided at both ends of an elastic cylindrical rubber sleeve 102 with respect to a holding mechanism (not shown) fixed to front and rear ends of a connecting member (not shown) provided in the longitudinal direction of the inside. Is fixed. A heater (not shown) is provided inside the rubber sleeve 102, and running wheels 103 which can support the machine body are provided below the holding mechanism.
Is provided. In addition, the front and rear holding mechanisms include a traction fitting 105.
Is provided.

When such an in-pipe repair machine 101 is used, a repair material (not shown) is wound around the outer periphery of the rubber sleeve 102, and the rubber sleeve 102 is inserted into the pipe in a contracted state. Running wheels 103,
103 is brought into contact with the inner bottom surface of the pipe, and the wire 107 connected to the traction fitting 105 is pulled from the ground in a desired direction, whereby the in-pipe repair machine 101 is moved to the failure location of the pipe.

Then, air is supplied to the rubber sleeve 102 from the ground to inflate the entire rubber sleeve 102, press the repair material against the inner peripheral surface of the pipe, and transmit power to the heater. Is heated, whereby the thermosetting adhesive applied to the outer surface of the repair material is thermally cured to fix the repair material on the inner peripheral surface of the pipe, thereby performing repair.

[0008] The rubber sleeve 102 has a substantially circular cross section, and is used to repair the boundary between the rubber sleeve 102 and the manifold.
Having a branch. The manifold sleeve 109 expands and contracts both in the direction of the manifold and in the radial direction of the manifold.

[0009] Rubber sleeve 102 and manifold sleeve 109
Means that they are separately made of, for example, the same material, and are superimposed and fixed at the boundary 111. The boundary 111 has a substantially elliptical shape that is long in the circumferential direction of the rubber sleeve 102.

[0010]

Generally, such an in-pipe repair machine has a dimension which is the same as the inner diameter of the pipe to be repaired. Specifically, the outer diameter of the holding mechanism and the outer diameter of the rubber sleeve 102 are as follows.
The dimensions are close to the inner diameter of the tube. However, boundary 11
In the case of No. 1, since the rubber is superposed, the dimension in the radial direction tends to be large, and therefore, a problem that the vicinity of the boundary 111 rubs against the inner wall of the tube and the thermosetting adhesive drops is likely to occur. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a problem arises in that the vicinity of the boundary between the rubber sleeve and the manifold sleeve rubs against the inner wall of the pipe and the thermosetting adhesive drops. The aim is to provide no pipe repair machines.

[0012]

In order to achieve the above object, an invention according to claim 1 comprises an elastic rubber sleeve for temporarily fixing a repair material having a thermosetting adhesive applied to an outer surface thereof. A pair of holding mechanisms for holding both ends of the rubber sleeve in a sealed state, a connecting member for connecting the pair of holding mechanisms inside the rubber sleeve, and a rubber heater provided close to the inside of the rubber sleeve, In an in-pipe repair machine having an air coupler provided on one holding mechanism for guiding air for inflating a rubber sleeve and a socket provided on one holding mechanism for energizing the rubber heater, the rubber sleeve includes: It has a substantially circular cross section and has a branch sleeve that expands and contracts in the direction of the branch to repair the boundary between the branch and the rubber sleeve and the branch sleeve. Boundary to be deposited is a pipe repair apparatus, characterized in that forms a long elliptical shape in the axial direction of the rubber sleeve.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An in-pipe repair machine according to an embodiment of the present invention will be described below with reference to FIGS.

A rubber sleeve 3 provided on the outermost periphery of the body 1 of the in-pipe repair machine has a cylindrical shape, has elasticity,
Expansion and contraction can be performed by injecting air or the like. The rubber sleeve 3 is for temporarily fixing a repair material (not shown) by winding the same, and a thermosetting adhesive is applied to an outer surface of the repair material. The outer cross section of the rubber sleeve 3 is circular.

The in-pipe repair machine 1 repairs a boundary between the main pipe 7 of the sewer and the branch pipe 9 as shown in FIG. A manifold sleeve 11 that expands and contracts in the direction is provided in a branched manner. The boundary 12 where the rubber sleeve 3 and the manifold sleeve 11 are overlapped and fixed has an elliptical shape that is long in the axial direction of the rubber sleeve 3. Thus, in a state where the manifold sleeve 11 is contracted (FIG. 6), the boundary 12 is located inside the concave portion 3A formed in the rubber sleeve 3 by the contraction.

Both ends of the rubber sleeve 3 are held in a sealed state by a pair of holding mechanisms 13. These holding mechanisms 13 are connected by a connecting member 15. This connecting member 15 is arranged inside the rubber sleeve 3. At the center in the longitudinal direction of the connecting member 15, a rubber heater 17 (indicated by a two-dot chain line) is close to the inside of the rubber sleeve 3 (outside the rubber sleeve 3 in the figure, but actually inside). (Actually, the heater spring 19 and the rubber heater 17 are connected to each other by the rubber sleeve 3.
Is inflated from the illustrated state).

Each holding mechanism 13 has a holding member 21 for holding the end of the rubber sleeve 3 in a sealed state. That is, the holding member 21 has a short columnar shape, the end of the rubber sleeve 3 is covered on the outer periphery, stopped by the wrap 23, then folded once, and the cap-shaped rubber retainer 25 is covered from above, and the bolt is 27, the holding member 2
Stopped at 1.

The holding member 2 of one of the holding mechanisms 13
1 (right side in FIG. 1, FIG. 3) is provided with a rotating shaft 29 therethrough. This penetration is performed in an airtight manner, and the rotating shaft 29 is rotatable and also serves as a pipe through which air for expanding the rubber sleeve 3 passes. A flange portion 31 is formed at the penetrating tip side of the rotary shaft 29, that is, at the right end in the drawing.
Further, a donut-shaped disk 33 is fixed by bolts 34, and an air coupler 35 is attached to the disk 33 by bolts 37.
Installed with. The air coupler 35 is provided with an air guide port 39 for guiding air, and faces the outside port of the rotary shaft 29 also serving as the pipe. The air coupler 35 is provided with a socket 41 for supplying electricity to the rubber heater 17 and a motor to be described later. A cover 36 is attached to the air coupler 35 with bolts 36A. Cover 36
Has a bullet shape tapered toward the outside of the end of the fuselage 1, which facilitates traveling.

The traveling wheels 45 and U are attached to the disk 33 via a member 43 attached by bolts 42.
A shackle 47 is provided. The U shackle 47 locks a wire or the like (not shown) for towing.

In the one holding mechanism 13 (right side in FIG. 1), the rotating shaft 29 and the disc 33 held in a penetrating state by the holding member 21 are fixed, and the traveling wheel 45 is mounted on the disc 33. In the other holding mechanism 13 (left side in FIG. 1), a self-propelled device 49 rotatably connected to a rotation shaft 48 protruding from a boss 21A formed on the holding member 21 is fixed. On the side, the drive wheels 50 are attached to the self-propelled device 49.

The self-propelled device 49 includes a bullet-shaped cover 36.
Are attached by bolts 36A.

The rotary shaft 27 is held by the holding member 21 through bearings in a penetrating state, and a gear 51 is provided concentrically at an end on the inner side of the body 1.
Is rotatable by a motor 53 that meshes with the motor.

As shown in FIG.
A window glass 55 is provided at the tip of the monitor glass unit 55. Inside the window glass 55, a monitor camera unit 5 for checking the position of the branch 9 (see FIG. 1) to be repaired is provided.
7 are provided. Further, the monitor camera unit 57
A halogen lamp 58 and the like for illuminating the outside through a window glass 55 are mounted near the camera (FIG. 6).

The manifold sleeve 11 expands in the radial direction of the manifold and presses the repaired material (not shown) wound and temporarily fixed to the inner peripheral surface of the manifold 9 in the radial direction of the manifold. It has a bellows shape so that it can expand and contract in any direction.

The bellows-shaped manifold sleeve 11 always tries to extend in the longitudinal direction of the manifold 9, but is normally held in a contracted state by being pulled by the mainspring device 59. The mainspring spring device 59 is configured as follows. That is, a total of four wires 60 attached to the four inside corners of the distal end of the branch pipe sleeve 11 are pulled in the contracting direction (downward in the figure), and each of the four pulleys 61 is turned in the horizontal direction. It is fixed to one slider 63. The slider 63 can slide on a rail 65 provided in the longitudinal direction of the connecting member 15. The slider 63 is further attracted by the unwound spring spring 67 and is held at the contracted position. The force of the mainspring spring 67 is applied to the manifold sleeve 1 by the air guided by the air coupler 35.
1 is set to a force that causes the slider 63 to slide to the right in the figure, losing the force to expand.

Hereinafter, a repair procedure by the in-pipe repair machine 1 according to this embodiment will be described.

That is, this in-pipe repair machine is carried to the site by an operator or the like, and a drain (not shown) is engaged with one of the two holding mechanisms 13 or both U shackles 47 to carry out repair. Lower to 7. And
While pulling the wire or running with the driving wheel 50 of the self-propelled device 49, the image sent from the monitor camera unit 57 is viewed on the monitor receiver on the ground, and the branch 9 (for the purpose of repairing). Look for Figure 1). At this time, an air hose for sending air to the air coupler 35, an energizing cable for energizing the socket 41, a signal cable for extracting an image signal from the monitor camera unit 57, and the like are attached to the in-pipe repair machine 1. The work is performed in a state where it is connected to.

Since the outer shape of the covers 36 provided at both ends of the fuselage 1 is in the shape of a tapered bullet, it is easy to get over dirt and steps inside the pipe 7 and the traveling becomes easy. .

Further, the rubber sleeve 3 and the manifold sleeve 1
A boundary 12 between the rubber sleeve 3 and the rubber sleeve 3 has an elliptical shape long in the axial direction, and the manifold sleeve 11 is contracted (FIG. 6).
Since the boundary 12 is located inside the recess 3A, it is possible to prevent the right and left dimensions in the radial direction from increasing. Therefore, it is possible to prevent a problem that the vicinity of the boundary 12 rubs against the inner wall of the tube 7 and the thermosetting adhesive drops.

When confirming the position of the manifold 9 by the monitor camera unit 57, the motor 53 is rotated to rotate around the bearing. That is, in both holding mechanisms 13, the connecting member 15 and the rubber sleeve 3 are rotated around the bearing with respect to the traveling wheel 45 around the longitudinal axis direction of the pipe 7, the aim of the monitor camera is adjusted, and the position of the branch pipe 9 is adjusted. Confirm. This rotation is performed, for example, 165 degrees in each of the left and right directions (FIG. 8).

When the position of the manifold 9 is confirmed, the running of the in-pipe repair machine 1 and the rotation of the motor 53 are stopped at that position, air is pumped from the ground, and the air coupler 35 and the rotating shaft 29 also serving as a pipe are moved. Air is sent to the inside of the rubber sleeve 3 through the air. Thereby, the rubber sleeve 3 starts expanding in the radial direction. At the same time, manifold sleeve 11
Performs not only radial expansion, but also longitudinal expansion of the manifold 9. This is because the mainspring spring 67, which has lost the force to expand the manifold sleeve 11 due to the air, is sent out and the slider 63 slides, so that the wire 60 cannot maintain the contracted state of the manifold sleeve 11.

When such expansion and elongation are sufficiently performed, the repair material wound around the outer circumferences of the rubber sleeve 3 and the manifold sleeve 11 and temporarily fixed becomes the main pipe 7 of the sewer.
And the inner peripheral surface of the manifold 9.

At this time, the silicon rubber heater 17 is
Until then, the rubber sleeve 3 was pushed radially inward by the force of contracting the rubber sleeve 3 and was located in a state close to the inside of the rubber sleeve 3. However, if the rubber sleeve 3 was expanded by air, The heater spring 19 moves radially outward together with the rubber sleeve 3 due to the force to expand. As a result, the silicon rubber heater 17 maintains a state close to the inside of the rubber sleeve 3.

When the silicon rubber heater 17 is energized, the repair material is heated through the rubber sleeve 3, and the thermosetting adherend applied to the outer surface of the repair material is thermally cured. Thereby, the repair material adheres to the inner peripheral surface of the pipe.

After the repair material is fixed to the inner peripheral surfaces of the pipes 7 and 9, air is released from the rubber sleeve 3. As a result, the mainspring spring 67, which has lost the force of the rubber sleeve that is trying to expand by air, returns to the original state again, the slide 63 slides leftward in the drawing, and the branch pipe sleeve 11 contracts. Silicon rubber heater 1
7 returns radially inward. In this way, the in-pipe repair machine 1 is separated from the inner peripheral surfaces of the pipes 7 and 9 again, can run, and is pulled back to the ground by the wire or the self-propelled device 49.

In the above embodiment, the running wheels 45
And the self-propelled device 49 is provided, but in other embodiments, the traveling wheels 45 and the self-propelled device 49 are not provided, and
Can also be moved.

[0037]

As described above, according to the in-pipe repair machine of the present invention, the boundary where the rubber sleeve and the manifold sleeve are overlapped and fixed has an elliptical shape long in the axial direction of the rubber sleeve. Therefore, it is possible to prevent the dimension in the radial direction from being increased, and to prevent a problem that the vicinity of the boundary rubs against the inner wall of the pipe and the thermosetting adhesive drops.

[Brief description of the drawings]

FIG. 1 is an overall longitudinal sectional view of an in-pipe repair machine according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a left half of FIG.

FIG. 3 is an enlarged sectional view showing a right half of FIG. 1;

FIG. 4 is a front view of the display shown in FIG.

FIG. 5 is a front view as seen from the right direction with a cover of FIG. 1 removed.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 1;

FIG. 7 is an external perspective view of a central portion of FIG.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 1;

FIG. 9 is an overall perspective view showing a conventional in-pipe repair machine.

[Explanation of symbols]

Reference Signs List 1 body of pipe repair machine 3 rubber sleeve 11 manifold sleeve 12 boundary 13 holding mechanism 15 connecting member 17 rubber heater 19 heater spring 21 holding member 29 rotating shaft 31 flange portion 33 disk 35 air coupler 36 cover 41 socket 45 running wheel 49 own Running device 53 Motor 57 Monitor camera unit 63 Slider 65 Rail 67 Spring spring

Claims (1)

[Claims] An elastic rubber sleeve for temporarily fixing a repair material having a thermosetting adhesive applied to an outer surface thereof, a pair of holding mechanisms for holding both ends of the rubber sleeve in a sealed state, and A connecting member for connecting the pair of holding mechanisms inside the rubber sleeve, a rubber heater provided near the inside of the rubber sleeve, and an air coupler provided on one of the holding mechanisms and guiding air for inflating the rubber sleeve; And a socket provided on one of the holding mechanisms for energizing the rubber heater, wherein the rubber sleeve has a substantially circular cross-section, and has a substantially circular cross section. The branch that has a branch sleeve that expands and contracts in the direction is also branched, and the boundary where the rubber sleeve and the branch sleeve are superimposed and fixed has a substantially elliptical shape that is long in the axial direction of the rubber sleeve. In-pipe repair machine characterized by the following.