JP4356959B2 - Pipe inner surface repair method and equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe inner surface repair method and apparatus, and more particularly to an inner surface repair method and apparatus for a pipe line buried in the ground.
[0002]
[Prior art]
Conventionally, asbestos-cement pipelines, polycon FRP pipelines, vinyl pipelines and the like have been used as power pipelines buried in the ground and accommodating power cables.
[0003]
Pipe inner surface repair is performed for abnormalities such as breakage inside the pipeline, wire scratches, and steps.
[0004]
In a conventional repair device, a glass cloth repair material is wrapped around the outer periphery of the rubber sleeve, compressed air is sent to the rubber sleeve at the damaged portion, the repair material is crimped to the damaged portion, and heated with a heater to repair the repair material. It is cured.
[0005]
As prior arts related to this, there are Japanese Patent Laid-Open No. 8-4978 “Embedded Pipeline Repair Method and Repair Device” and Japanese Patent Laid-Open No. 8-159363 “In-Pipe Repair Machine”.
[0006]
[Problems to be solved by the invention]
In a conventional repair device, a glass cloth repair material is wrapped around the outer periphery of the rubber sleeve, compressed air is sent to the rubber sleeve at the damaged portion, the repair material is crimped to the damaged portion, and heated with a heater to repair the repair material. Although it is hardened, the space of the damaged part cannot always be sufficiently filled with the repair material, and sufficient repair may not be performed.
[0007]
[Means for Solving the Problems]
Therefore, in view of the above circumstances, the present invention provides a pipe without digging up a damaged portion of a pipeline buried in the ground so that the repaired material can be sufficiently filled in the space of the damaged portion so that sufficient repair can be performed. filling the repairing material from the interior of the road, paste and an inner surface repairing method of repairing a central axis rotation for rotating the central axis Ri by the air motor disposed in the cylindrical rubber tube and the inner rubber tube Means, and a first outer cylinder and a second outer cylinder are externally fitted to the central axis, and one end of the connecting piece is pivotally attached to each of both ends of the support shaft in which the rubber roller is rotatably fitted. The other end of the connecting piece the repair device having a first outer cylinder, the rotation radius changing means for scaling the radius of rotation of the pantograph roller over which is formed a parallelogram with the second outer cylinder respectively pivotally connected to the support shaft and the connection piece, Compressed air that is carried from the ground into the damaged part of the pipeline More was a tube inner surface repairing method which is characterized in that so as to repair while bulging a rubber tube by rotating the pantograph roller wound on a rubber tube repair material paste filling and.
[0008]
In addition, the present invention has a stretchability fixed to a pair of front and rear cylindrical support plates so that sufficient repair can be performed by sufficiently filling the space of the damaged portion with repair material on the outer peripheral surface. externally fitted a cylindrical rubber tube for winding wood, a central axis rotating means for rotating the I Ri central axis air motor disposed in the rubber tube, a first outer cylinder and second outer cylinder to the central axis One end of the connecting piece is pivotally attached to each end of the support shaft on which the rubber roller is rotatably fitted, and the other end of the connecting piece is pivotally attached to the first outer cylinder and the second outer cylinder, respectively. A pipe inner surface repair device comprising a rotation radius changing means for enlarging or reducing the rotation radius of a pantograph type roller having a parallelogram formed with a connecting piece .
[0009]
Further, according to the present invention, the central axis rotating means for rotating the central axis is arranged so that the central axis is centered on the axial line so that the repaired material can be sufficiently filled in the space of the damaged portion. The pipe inner surface repair device is characterized in that it is rotated by an air motor that drives a central axis through a universal joint disposed at the end of the tube.
[0010]
Furthermore, in the present invention, the rotation radius changing means is configured to apply the rotational force of the central shaft in a rotational direction so that the repaired material is sufficiently filled in the space of the damaged portion so that sufficient repair can be performed. A torque limiter that is provided on the central shaft that moves along the detent stay to limit the rotation of the central shaft, a disc spring that presses a pantograph roller that slides on the outer cylinder fitted on the central shaft, and an external fit on the central shaft A pipe inner surface repair device, wherein the rotation radius of the pantograph roller is enlarged or reduced by a meshing clutch in which opposed surfaces of the first outer cylinder and the second outer cylinder mesh with each other between the first outer cylinder and the second outer cylinder. did.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail below on the basis of a specific example of the accompanying drawings.
[0012]
1 shows the entire pipe inner surface repair device, FIG. 2 is a right side view of FIG. 1, FIG. 3 is an enlarged cross-sectional view of the main part of FIG. 1, and FIG.
[0013]
The heads 1 and 2 are arranged on the left and right sides, and the left end and the right end of the cylindrical rubber tube 3 are fitted and fixed to the heads 1 and 2, respectively.
[0014]
A bearing 4 is provided at the center of the head 1, and the left end of the drive shaft 5 disposed on the axis of the rubber tube 3 is fixed to the bearing 4 so that the drive shaft 5 is rotatable. The right end of the drive shaft 5 is connected to an air motor 7 accommodated in the center of the head 2 through a universal joint 6.
[0015]
Reference numerals 10 and 11 are air supply ports for the air motor 7, 12 is an exhaust port for the air motor 7, and 9 is an air supply / exhaust port for the rubber tube 3.
[0016]
When compressed air is supplied to the rubber tube 3, the rubber tube 3 expands and expands in diameter. A repair material for underwater bonds wound around the outer peripheral surface of the expanded rubber tube 3 is accommodated in the rubber tube 3. It is pressed by the pantograph-type roller 13 and filled and pasted to the damaged portion for repair.
[0017]
The pantograph roller 13 is formed as follows.
[0018]
The pantograph roller 13 is provided on the first outer cylinder 14 and the second outer cylinder 15 that are fitted on the drive shaft 5. The pantograph roller 13 is pivotally attached at one end of a connecting piece 18 to both ends of a support shaft 17 on which a rubber roller 16 is rotatably fitted, and the other end of the connecting piece 18 is pivotally attached to the first outer cylinder 14. . The left connecting piece 18, the support shaft 17, and the right connecting piece 18 form a parallelogram.
[0019]
One end of the link 19 is pivotally attached to the second outer cylinder 15 fitted on the left side of the drive shaft 5 at the same position as the left end of the support shaft 17 and one end of the connecting piece 18, and the other end of the link 19 is connected to the second outer cylinder 15. The two outer cylinders 15 are fitted on the second outer cylinder 15 by the keys 20 embedded in the second outer cylinder 15 and pivotally attached to the slide metal fitting 21 which slides in the axial direction. The slide metal fitting 21 is pressed rightward by the buffer disc spring 22. Reference numeral 23 denotes an adjusting nut.
[0020]
The right end of the second outer cylinder 17 and the left end of the first outer cylinder 14 are provided with meshing clutches 30 and 31 that engage and engage with each other.
[0021]
In order to allow the pantograph roller 13 to operate smoothly, the pantograph roller 13 does not start to rotate suddenly, but is torqued toward the left end of the drive shaft 5 so that it starts rotating after reaching a certain level of torque. A limiter 24 is provided.
[0022]
The drive shaft 5 is provided with a screw thread 25 on the left end side and close to the bearing 4 so as to be screwed with the second outer cylinder 15, and a non-rotating stay 26 that protrudes in the horizontal inward direction from the head 1 is connected to the center of the torque limiter 24. Since the notch 28 of the plate 27 and the notch of the torque limiter cover 29 are fitted, the drive shaft 5 is rotated by driving the air motor 7, and the second outer cylinder 15 is on the right side (the pantograph roller 13 is enlarged) or on the left side. The pantograph roller 13 moves in the direction of reduction.
[0023]
The torque limiter 24 applies a certain torque or more, and the pantograph roller 13 starts rotating only after the clutch 30 and the clutch 31 are engaged.
[0024]
Next, the operation of the repair device will be described with reference to the operation state of the repair device of FIGS. 5 and 6 and the operation procedure of the operation panel of FIG.
[0025]
As shown in FIGS. 5 and 6, this repairing device is pulled and arranged to a damaged portion by a wire 41 installed in advance. The air supply / exhaust port 9 for the rubber tube 3 of the repair device, the air supply ports 10 and 11 for the air motor 7, and the exhaust port 12 for the air motor 7 are connected from the compressor via the operation panel by the air hose 42. The operation procedure is as follows.
[0026]
(1) Open valve A.
[0027]
(2) Adjust the pressure with the pressure reducing valve.
[0028]
(3) Open valve B.
[0029]
(4) Open valve C.
[0030]
(5) Move the lever of the control valve D to the right rotation side, and rotate (enlarge) the pantograph roller 13 to the right.
[0031]
(6) The pantograph type roller 13 rotates and the repair material is filled and pasted.
[0032]
(7) Move the lever of the control valve D to the left rotation side and rotate the pantograph roller 13 to the left (reduction).
[0033]
(8) With the rubber tube 3 inflated, wait until the repair material 43 is cured.
[0034]
(9) After the repair material 43 is cured, the valve B is closed, the compressed air is stopped, and the exhaust valve is opened.
[0035]
(10) Remove the repair device from the pipeline 44.
[0036]
A state corresponding to the above (1) to (10) is shown in FIG.
[0037]
【The invention's effect】
The present invention, as described above, is a pipe inner surface repair method in which a repair material is filled and pasted from the inside of a pipe without repairing a damaged portion of the pipe buried in the ground, and is repaired by a cylindrical rubber. a central shaft rotating means for rotating the I Ri central axis air motor disposed in the tube and the rubber tube, a first outer cylinder and second outer cylinder and fitted outside the central axis, rotatable rubber roller One end of the connecting piece is pivotally attached to each end of the support shaft that is externally fitted, and the other end of the connecting piece is pivotally attached to the first outer cylinder and the second outer cylinder, respectively, and a parallelogram is formed by the support shaft and the connecting piece. the repair device with a rotating radius changing means for scaling the radius of rotation of the formed pantograph roller over, and carried into the damaged part of the pipeline, by the compressed air fed from the ground, swelled rubber tube While rotating the pantograph roller, rubber tube Since the wrapped repair material is in the tube surface repair method being characterized in that so as to repair paste filling and, sufficiently filled with the repair material in the space of breach, allows sufficient repair.
[0038]
Further, the present invention includes a cylindrical rubber tube winding the repairing material to the outer peripheral surface has a fixed stretch before and after a pair of cylindrical support plate, Ri by the air motor disposed in the rubber tube center Center shaft rotating means for rotating the shaft, and the first outer cylinder and the second outer cylinder are externally fitted to the central axis, and one end of the connecting piece is attached to each of both ends of the support shaft rotatably fitted with the rubber roller. Rotating radius change to expand and reduce the rotating radius of the pantograph type roller that is pivotally attached and the other end of the connecting piece is pivotally attached to the first outer cylinder and the second outer cylinder respectively and the support shaft and connecting piece form a parallelogram Since the pipe inner surface repair device is provided with the means, the repair material can be sufficiently filled in the space of the damaged portion and sufficient repair can be performed.
[0039]
Further, according to the present invention, the central axis rotating means for rotating the central axis is freely rotatable by an air motor that drives the central axis via a universal joint that is disposed on the end of the central line. Since it is a pipe inner surface repair device characterized by rotating, sufficient repair can be performed by sufficiently filling the space of the damaged portion with a repair material.
[0040]
Furthermore, the present invention provides a torque limiter for restricting the rotation of the central axis , wherein the turning radius changing means is provided on the central axis which moves the rotational force of the central axis along the rotation stop depending on the rotational direction. A disc spring that presses a pantograph-type roller that slides on an outer cylinder that is externally fitted to the central axis, and a first outer cylinder and a second outer cylinder that are externally fitted to the central axis. Since the pipe inner surface repair device is characterized in that the rotation radius of the pantograph roller is enlarged and reduced by a meshing clutch in which the opposing surfaces mesh with each other, the repair material can be sufficiently filled by sufficiently filling the space of the damaged portion.
[Brief description of the drawings]
FIG. 1 is a view showing a pipe inner surface repair device according to a specific embodiment of the present invention.
FIG. 2 is a right side view of FIG.
FIG. 3 is an enlarged view of a main part of FIG. 1;
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
FIG. 5 is a diagram showing an operating state of the repair device.
FIG. 6 is a diagram showing an operating state of the repair device.
FIG. 7 is a diagram illustrating an operation procedure of an operation panel.
[Explanation of symbols]
3 ... Rubber tube 43 ... Repair material 44 ... Pipe line 16 ... Rubber roller 7 ... Air motor

Claims (4)

It is a pipe inner surface repair method in which repair material is filled and affixed from the inside of the pipe without digging up the damaged part of the pipe buried in the ground, and placed inside the cylindrical rubber tube and rubber tube a central shaft rotating means for rotating the I Ri central axis to the air motor, the first outer cylinder and second outer cylinder and fitted outside the central axis, both ends of the support shaft and fitted outside the rubber roller rotatably the pivoted one end of the connecting piece, the first outer cylinder and the other end of the connecting piece, the rotation radius of the second pivotally connected to the outer cylinder each support shaft and the connecting piece and form a parallelogram with the pantograph type roller over A repairing device equipped with means for changing the radius of rotation that expands and contracts is carried into the damaged part of the pipeline, and the pantograph-type roller is rotated while the rubber tube is bulged by the compressed air fed from the ground, and the rubber is Repair material wrapped around the tube Inner surface repairing method which is characterized in that so as to repair paste-Hama. Center to rotate a cylindrical rubber tube winding the repairing material to the outer peripheral surface has a fixed stretch before and after a pair of cylindrical support plate, the O Ri central axis arranged air motor within the rubber tube One end of the connecting piece is pivotally attached to each of both ends of the shaft rotating means , the first outer cylinder and the second outer cylinder being fitted to the central axis, and the rubber roller being rotatably fitted. The other end of the pantograph was provided with a turning radius changing means for enlarging and reducing the turning radius of the pantograph type roller that was pivotally attached to the first outer cylinder and the second outer cylinder and formed with a parallelogram with a support shaft and a connecting piece. Pipe inner surface repair device characterized by The center axis rotation means for rotating the center axis is characterized in that the center axis is rotated on an axis line by an air motor that drives the center axis via a universal joint arranged at the end of the center line. The pipe inner surface repair device according to claim 2. The turning radius changing means is a torque limiter that limits the rotation of the central axis on the outer cylinder that is fitted around the central axis. A disc spring that presses the pantograph type roller that slides on the pantograph, and a pantograph type by a meshing clutch in which the opposing surfaces of the first outer cylinder and the second outer cylinder are engaged with each other by the first outer cylinder and the second outer cylinder that are fitted on the center axis. 3. The pipe inner surface repair device according to claim 2, wherein the rotation radius of the roller is enlarged or reduced.

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