JPH07253188A - Automatic repairing device for inside of pipe - Google Patents

Abstract

PURPOSE:To insert a repairing device in a meandering buried pipe by making a trunk bendable freely by providing an adjustable joint to the shaft of the trunk inserted in the buried pipe, in which a repairing member is set. CONSTITUTION:A trunk 11 is formed of a heat resisting tubular member which is expandable and has a high conductibility, and it has shafts 12 passing through the center of the tube in order to maintain the length in the longitudinal direction. The shafts 12 extend from the centers of the base end faces of both ends 14 and 1 5 to the trunk 11, and a flexible tube 13 which consists of a hard rubber tube connected with the shafts 11 extending from the left side and the right side is provided at the center. As a result, the trunk 11 can be bent freely. A repairing member stuck to, a damaged position on the inner wall of the pipe is set to the trunk 11. Since the trunk 11 can be bent freely at the position of the adjustable joint in such a way, a repairing device can be passed through a buried pipe at its bending part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to an automatic in-pipe repair device for repairing a buried pipe such as a sewer pipe (pipe).

[0002]

2. Description of the Prior Art Buried pipes have deteriorated or subsided, or
BACKGROUND ART There is an in-pipe automatic repair device that, when cracked or damaged due to vibration of a passing vehicle, sends the device into the pipe by ground operation and attaches a repair member to the defective portion for repair. This automatic in-pipe repair device can be automatically driven by an in-pipe automatic repair device that is remotely operated by radio waves from the ground and fed into the pipe, or it can be moved into the pipe by using tow ropes that are locked at the front and rear of the device. There are things to do. However, the problem is how to make the in-pipe automatic repair device (hereinafter, simply referred to as a repair device) reach a target repair location. The buried pipe is not necessarily buried in a straight line, but is usually bent according to the environment of the place where it is buried. Therefore, the conventional repair device having a linearly rigid structure cannot pass such a bent portion. Of course, the shorter the overall length of the device itself, the more the passage through the bent portion becomes possible. However, the shortening of the device also shortens the repair member that can be set on the body, so it is necessary to repair the target location.
The repair device must be reciprocated between the repair location and the hand several times. In addition, since many buried pipes are subject to loads such as vehicles passing from the ground and loads due to geological changes, earth pressure, etc., the pipelines are not always flat, and there are protrusions on the pipe wall due to breakage, Usually, there are obstacles such as broken pipes, displacement of pipe joints, separation of joints, or residual remnants of pipes.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an in-pipe automatic repair device that solves these problems.

[0004]

In order to solve the above-mentioned object, the invention of claim 1 is to insert a repairing member into the pipe by expanding and heating the body part inserted into the buried pipe and having the repairing member set therein. In the in-pipe automatic repair device that is attached to a wall and collected, the body is configured to be bendable by interposing a universal joint on the shaft of the body. According to a second aspect of the present invention, there is provided an automatic in-pipe repair device which is inserted into an embedded pipe and is recovered by adhering the repair member to an inner wall of the pipe by expansion and heating of a body portion in which the repair member is set. A plurality of universal joints are interposed on the shaft of the body so that the body can be bent in multiple stages. According to a third aspect of the present invention, there is provided an automatic in-pipe repair device which is inserted into an embedded pipe and is recovered by adhering the repair member to an inner wall of the pipe by expansion and heating of a body portion in which the repair member is set. A flexible tube is used as the shaft of the body, and the body is configured to be bendable. The invention of claim 4 is a cord locking portion for locking a tow cord on both front and rear ends of the body,
It has a control connection part to which a control electric cable, an air pipe, etc. are connected on the rear end side, and is pulled in by the tow line on the front end side inside the pipe embedded with the repair member set in the body In the in-pipe automatic repair device that is inserted into the pipe, the repair member is attached to the inner wall of the pipe by expansion and heating of the body, and then recovered by pulling out by the tow line on the rear end side, the shaft of the body is free It is formed to be bendable with a joint interposed, and the front and rear end sides of the body portion have bulging end portions having a diameter corresponding to the pipe diameter and bulging into a substantially hemispherical shape, and the cord engaging portion. The control connection portion is formed by recessing the required portion of the bulged end portion. According to the invention of claim 5, a cord locking portion to which a tow cord is locked on both front and rear ends of the body portion, and a control connection portion to which a control electric cable, an air pipe or the like is connected on the rear end side. Have
The repair member is set in the body and inserted into the pipe by pulling in by the tow line on the front end side, and the repair member is attached to the inner wall of the pipe by expansion and heating of the body, and then the rear end side. In the in-pipe automatic repair device that is recovered by pulling out by the tow rope, the shaft of the body part is formed to be bendable using a flexible tube, and the front and rear end sides of the body part have a pipe diameter. A bulging end portion having a corresponding diameter and being inflated into a substantially hemispherical shape is formed, and the cord locking portion and the control connecting portion are provided by denting a required portion of the bulging end portion. did. According to the invention of claim 6, a cord locking portion to which the tow cord is locked on both front and rear end sides of the body portion, and a control connecting portion to which a control electric cable, an air pipe or the like is connected on the rear end side. And having a repair member set in the body is inserted into the tube buried by the pulling cord on the front end side, and the repair member is attached to the inner wall of the tube by expansion and heating of the body. In the in-pipe automatic repair device that is recovered by pulling out from the rear end side of the tow line, the shaft of the body part is formed to be bendable with a universal joint interposed, and the front and rear end sides of the body part are To form a bulging end portion having a diameter corresponding to that of a substantially hemispherical shape, and the cord locking portion and the control connecting portion are provided by denting the required portion of the bulging end portion, and The both bulged ends and the universal joint of the body are provided with a water passage extending longitudinally in the axial direction of the apparatus. According to the invention of claim 7, a cord locking portion for locking the tow cord on both front and rear end sides of the body portion, and a control connecting portion for connecting a control electric cable, an air pipe or the like on the rear end side. And having a repair member set in the body is inserted into the tube buried by the pulling cord on the front end side, and the repair member is attached to the inner wall of the tube by expansion and heating of the body. In the automatic repair device for pipes that is recovered by pulling out from the rear end side of the tow cord, it is formed to be bendable by using the flexible tube of the body, and the front and rear end sides of the body are To form a bulging end portion having a diameter corresponding to that of a substantially hemispherical shape, and the cord locking portion and the control connecting portion are provided by denting the required portion of the bulging end portion, and A water passage communicating with the tube of the body and extending longitudinally in the axial direction of the apparatus is provided at both of the bulged ends. According to the invention of claim 8, a cord locking portion to which a tow cord is locked on both front and rear end sides of the trunk portion, and a control connecting portion to which a control electric cable, an air pipe or the like is connected on the rear end side. And having a repairing member set in the body, it is inserted into the pipe buried by the tow line on the front end side, and the repairing member is attached to the inner wall of the pipe by expanding and heating the body. In the in-pipe automatic repair device that is recovered by pulling out from the rear end side by the tow rope, the front and rear end sides of the body part are formed flexibly by using a flexible tube for the shaft of the body part. Has a diameter corresponding to the diameter of the pipe and forms a bulging end portion that is inflated into a substantially hemispherical shape, and the cord locking portion and the control connecting portion are formed by denting the required part of the bulging end portion A water passage communicating with the tube of the body and extending longitudinally in the axial direction of the device is provided at both of the bulged ends, and the body is To have a heating substrate heating means a structure which supports biased as pressed against the barrel inner wall.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing an embodiment. FIG. 1 is a vertical cross-sectional view of an automatic in-pipe repair device 10 in which a flexible tube 13 is interposed on a shaft 12 of a body 11 so that the body 11 can be bent. In the embodiment, a hard rubber tube is used as the tube 13, and the tube 12 is fixed to the shaft 12 by fixing nuts provided at both ends of the rubber tube. The shaft 12 extends in the axial direction of the body part 11 from the center of the base end surfaces of the end parts 14 and 15 located on both ends of the body part 11, and between the shafts 12 and 12 extending from the left and right, that is, The pipe 13 is connected at the center of the body 11. The body 11 is best formed of a tubular member that is inflatable and has high heat conductivity and heat resistance. Both ends of the body portion 11 are fixed to the base end edges of the end portions 14 and 15. Reference numeral 17 is a pressing claw provided on the edge side of each of the end portions 14 and 15 for fixing the tubular member. In this way, the body portion 11 has the shaft 12 passing through the center of the cylinder in order to maintain the length in the longitudinal direction, and the shaft 12 extends from the center of the proximal end face of the both end portions 14 and 15 to the body portion 11. The shaft 1 that extends from the left and right in the center of the body 11.
By interposing a flexible tube 13 connected to the cables 2 and 12, the body portion 11 can be freely bent as shown in FIG. A repair member (not shown) attached to the damaged portion of the inner wall of the pipe is set or temporarily covered on the body portion 11.

[0006] The repair member is, for example, a belt-shaped material containing rubber as a main component and having a proper elasticity, and is wound so that its ends are sufficiently overlapped with each other around the waist of the cylindrical portion, and the repaired member is grounded on the trunk. It is pressed against the inner wall by the expansion pressure of the air supply, and in the pressed state, the body part is heated by the control from the ground, and the thermal change is promoted to adhere to the inner wall. That is, the repair member is appropriately softened and heat-welded by heating.

There are some repair members that are attached by an adhesive regardless of heat change. In this case, apply an adhesive that cures over time to the repair member set in the barrel and insert it into the tube, and continue to press the damaged portion with the inflation pressure of the barrel until the adhesive cures properly. Only. Therefore, no heating means is used.

Referring again to FIG. 1, reference numeral 18 in the drawing is a heat generating substrate which constitutes a heating means, and 19 is an urging for urging the heat generating substrate 18 so as to lightly press the inner wall of the body portion 11. A spring as a means. In the embodiment, the heat generating substrate 18 is made of a flexible and heat resistant resin, and a heating element such as a heating wire or a chip-shaped ceramic substrate is embedded therein. The heat generating substrate 18 is formed in a striped shape, and is biased and supported by a spring fixed to the shaft 12 so as to extend in the vertical direction along the inner wall of the body portion 11. FIG. 3 is a cross-sectional view showing a state in which the urging instruction is given, and FIG.
1 is a transverse cross-sectional view at the time of expansion in which air is supplied, and FIG. 5 is a vertical cross-sectional view thereof.

When the body portion 11 expands, the heat generating substrate 18 pressed against the inner wall of the body portion 11 is biased and supported, so that FIG.
From the above state, the body portion 11 that follows expands and follows the state of being in pressure contact with the inner wall even when expanding. Therefore, the heat of the heat generating substrate 18 is efficiently transmitted to the repair member wound on the body portion 11, and the heat loss can be greatly reduced. When the air is released, the body portion 11 contracts and returns by itself due to its elastic force, but at the time of contraction, the heat generating substrate 18 is pushed in the axial direction against the biasing force of the biasing member and the state of FIG. Return to.

The shafts 12 and 12 of the embodiment are hollow pipes, and the hollows of the pipes penetrate right and left ends 14 and 15 to form a water passage 16 which extends longitudinally in the axial direction of the repair device. By providing such a water passage 16, there is an advantage that even if the repair device is inserted into the buried pipe, the water flow is not obstructed, and the repair work can be performed without completely stopping the water flow. .

In FIG. 6, the drawing is an enlarged view of the rear end side of the body portion 11. Reference numeral 20 in the figure is a cord locking portion for locking the tow cord provided at the end portion 15 for pulling the repair device backward. At the front end of the repair device, there is also a cord locking portion for pulling forward (not shown). Further, reference numeral 21 is a connecting portion of an air pipe connected to the rear end side of the repair device. As seen in the example of the air pipe, a control electric cable and the like are also connected to the rear end side of the repair device (not shown).

The repair device is inserted into the buried pipe by pulling in the tow line on the front end side, and the repair member is attached to the inner wall of the pipe by expansion and heating of the body portion 11, and then the tow line on the rear end side. It will be collected by withdrawal. The end portions 14 and 15 of the repair device shown in the figure have a shape that is bulged forward or backward in a substantially hemispherical shape, that is, bulged end portions, depending on the respective positions. This is due to breakage of the pipe wall due to breakage in the buried pipe, breakage of the pipeline, misalignment of the pipe seam, separation of the seam,
Or, if there are obstacles such as residual remnants in the pipe, they are forcibly broken through.

The conventional repair device of this type has a simple tube end shape in which both ends are cut off.
Due to the injuries in the jurisdiction, it was extremely difficult to move back and forth. Therefore, in order to break through such obstacles, it is best that both ends have a bulged shape. For example, not only a bullet type that is a completely hemisphere, but also a warhead shape that is long with respect to the diameter,
It may have a conical shape or a shape in which the tip of the conical shape is cut off. In order to maintain such a shape, the control connecting portions such as the connecting portion 21 of the air pipe and the rope retaining portion 20 for the tow rope are located at a position depressed from the front curved surface of the bulging end portions 14 and 15. The connection part is provided in the.

The bulging shape of the end portions 14 and 15 does not necessarily have to be a shape in which the contents of the shape are solid as in the above example. For example, FIG. 7 shows a flat member 30 assembled in a cross shape and formed at the tip of the end portion, and FIG. 8 shows a shape in which the cross-over portion of FIG. 7 is cut. or,
Although not shown, rod-shaped or linear members may be assembled in a net shape or a net shape to form a bulged shape.

The sizes of the end portions 14 and 15 are preferably approximately the same as the inner diameter of the target buried pipe, and too small is not appropriate. Further, since the diameters of the end portions 14 and 15 have a function of protecting the repair member set in the body portion 11, that is, a function of preventing rubbing during forward and backward movements in the pipe,
Body 11 in the state where the repair member is wound, that is, in the set state
It is necessary to be larger than the outer diameter of.

Next, another example in which the flexibility of the body portion 11 of the repair device is realized by a universal joint will be shown. FIG. 9 shows a ball joint type joint 3
1 is interposed in the middle of the shaft of the body 11. In this case, the body portion is bent at one point of the joint portion as illustrated. In FIG. 10, the ball joint type joint 31 is provided in two stages, and when it is used in this way, it bends at two joint portions. The figure shows an example in which the front end side and the rear end side face in different directions, and the center line on the front end side and the center line on the rear end side are misaligned and can be bent. Of course, when the front end side and the rear end side face in the same direction, they are bent at two points of the two joints and bent in an arc shape. Furthermore, such joint parts 31
If three or more are provided in other stages, the degree of bending will be further increased. In this embodiment, similarly to the above-described example, since the water passage 16 that extends vertically through the repair device is formed, all joint type joints are made of pipe material, and the example of FIG. 9 is a universal pipe joint.

[0017]

According to the invention of claim 1, the body portion can be freely bent at the position of the universal joint. According to the invention of claim 2, the body portion can be freely bent at a plurality of positions where the universal joint is provided. In particular, a relatively large curvature can be obtained when the center line of the body portion is bent in a state where the center line is misaligned or when the body portion is bent in an arc shape in the same direction. According to the third aspect of the present invention, since the flexible tube is used, it is possible to bend freely regardless of the length of the tube. According to the invention of claim 4, the body portion can be freely bent at the position of the universal joint, and even if there is an obstacle such as a protrusion of a damaged inner wall or a displacement or opening of the joint of the buried pipe in the buried pipe, The repair device can be advanced and retracted over the obstacle by a forced and forcible front-back traction operation. According to the invention of claim 5, the body can be freely bent at the position of the universal joint, and even if there is an obstacle such as a protrusion of a damaged inner wall or a displacement or opening of the joint of the buried pipe in the buried pipe, The repair device can be advanced and retracted over the obstacle by a forced and forcible front-back traction operation. According to the invention of claim 5, the body can be freely bent at the positions of the plurality of universal joints, and there are obstacles such as a broken inner wall protruding and a displacement or opening of the joint of the buried pipe in the buried pipe. Also, the repair device can be moved forward and backward over the obstacle by the forced and forcible front and rear pulling operation. According to the invention of claim 5, the body can be smoothly and flexibly bent at any position in the longitudinal direction of the pipe, and
Even if there is an obstacle such as a broken inner wall protrusion or a seam displacement or opening of the buried pipe in the buried pipe, the repair device can be moved forward and backward over the obstacle by a forcible and forcible front and rear pulling operation. According to the invention of claim 6, the barrel can be freely bent at the position of the universal joint, and even if there is an obstacle such as a protrusion of a damaged inner wall or a displacement or opening of the joint of the buried pipe, It is possible to perform the repair work by moving the repair device forward and backward without overcoming the obstacle by the forcible and forcible front and rear pulling operation, and without stopping the flow of water in the buried pipe. According to the invention of claim 7, the body can be flexibly smoothly bent at any position in the longitudinal direction of the pipe, and the protrusion of the broken inner wall and the displacement or opening of the joint of the buried v pipe can be opened in the buried pipe. Even if there are obstacles such as, etc., it is possible to perform repair work by moving the repair device forward and backward without exceeding the obstacle by forcibly and forcibly pulling back and forth, and without stopping the flow of water in the buried pipe. . According to the invention of claim 8, the body can be smoothly and flexibly bent at any position in the longitudinal direction of the pipe, and the protrusion of the broken inner wall and the displacement or opening of the joint of the buried pipe can be caused in the buried pipe. Even if there is any obstacle, the repair work can be performed by moving the repair device forward and backward without overcoming the obstacle by the forcible and forcible front and rear pulling operation and without stopping the flow of water in the buried pipe. Further, since the heat-generating substrate of the heating means follows the expansion of the body, it is possible to heat efficiently.
The heat loss can be greatly reduced as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a repair device using a flexible tube as a shaft of a body.

FIG. 2 is a vertical cross-sectional view showing a bent state of a repair device using a tube.

FIG. 3 is a cross-sectional view of a repair device using a tube.

FIG. 4 is a transverse cross-sectional view of the repair device using the tube when the tube is expanded.

FIG. 5 is a vertical cross-sectional view of the repair device using the tube when the tube is expanded.

FIG. 6 is an enlarged cross-sectional view of a rear end portion of a repair device using a tube.

FIG. 7 is an enlarged cross-sectional view showing another embodiment of the bulged end portion.

FIG. 8 is an enlarged cross-sectional view showing still another embodiment of the bulged end portion.

FIG. 9 is a vertical cross-sectional view of a repair device using a universal joint on the shaft of the body.

FIG. 10 is a vertical cross-sectional view of a repair device using a plurality of universal joints on the shaft of the body.

[Explanation of symbols]

10 Repair Device 11 Body 12 Shaft 13 Tube 14, 15 End (Swelling End) 16 Water Passage 18 Heat Generation Substrate (Heating Means) 19 Spring (Heating Means) 20 Air Pipe Connection 21 Tractor Connection 31 Indirect joint (universal joint)

Claims (10)

[Claims] 1. An automatic in-pipe repair device, which is inserted into an embedded pipe and is recovered by adhering the repair member to the inner wall of the pipe by expansion and heating of the barrel in which the repair member is set, An automatic repair device for pipes, characterized in that the body is made flexible by interposing a universal joint on the shaft of the. 2. An automatic in-pipe repair device, which is inserted into an embedded pipe and is recovered by adhering the repair member to the inner wall of the pipe by expansion and heating of the barrel in which the repair member is set. An automatic in-pipe repair device characterized in that the body is made to bend in multiple stages by interposing a plurality of universal joints on the shaft. 3. An in-pipe automatic repairing device which is inserted into an embedded pipe and is recovered by adhering the repair member to the inner wall of the pipe by expansion and heating of the barrel in which the repair member is set. An automatic in-pipe repair device, characterized in that a flexible tube is used as an axis of the body to allow the body to bend. 4. A cord retaining portion for retaining a tow cord on both front and rear ends of the trunk portion, and a control connecting portion for connecting a control electric cable, an air pipe, etc. on the rear end side. Then, after the repair member is set in the body, it is inserted into the tube buried by the tow line on the front end side, and after the body is expanded and heated, the repair member is attached to the inner wall of the tube. In an in-pipe automatic repair device that is recovered by pulling out by a tow rope on the end side, the shaft of the body part is formed to be bendable with a universal joint interposed, and the front and rear end sides of the body part are formed into a substantially hemispherical shape. An automatic in-pipe repair device, characterized in that a bulged end portion is formed, and the cord locking portion and the control connection portion are provided by recessing a required portion of the bulged end portion. 5. A cord retaining portion for retaining a tow cord on both front and rear ends of the body portion, and a control connecting portion for connecting a control electric cable, an air pipe and the like on the rear end side. Then, after the repair member is set in the body, it is inserted into the tube buried by the tow line on the front end side, and after the body is expanded and heated, the repair member is attached to the inner wall of the tube. In an in-pipe automatic repair device that is recovered by pulling out by a tow line on the end side, the shaft of the body part is formed to be bendable using a flexible tube, and the front and rear end sides of the body part are substantially A hemispherical bulging end portion is formed, and the cord retaining portion and the control connecting portion are provided by denting the required portion of the bulging end portion. . 6. A cord retaining portion for retaining a tow cord on both front and rear ends of the body portion, and a control connecting portion for connecting a control electric cable, an air pipe, etc. on the rear end side. Then, after the repair member is set in the body, it is inserted into the tube buried by the tow line on the front end side, and after the body is expanded and heated, the repair member is attached to the inner wall of the tube. In an in-pipe automatic repair device that is recovered by pulling out by a tow rope on the end side, the shaft of the body part is formed to be bendable with a universal joint interposed, and the front and rear end sides of the body part are formed into a substantially hemispherical shape. Forming a bulging end in the form of a bulge, arranging the cord locking portion and the control connecting portion by recessing the required portion of the bulging end, The automatic joint repairing device for pipes, wherein the universal joint is provided with a water passage extending longitudinally in the axial direction of the device. 7. A cord retaining portion for retaining a tow cord on both front and rear ends of the body portion, and a control connecting portion for connecting a control electric cable, an air pipe, etc. on the rear end side. Then, after the repair member is set in the body, it is inserted into the tube buried by the tow line on the front end side, and after the body is expanded and heated, the repair member is attached to the inner wall of the tube. In an automatic pipe repair device that is recovered by pulling out by a tow line on the end side, the front and rear end sides of the body are formed into a substantially hemispherical shape by using the flexible tube of the body. A bulged end is formed, and the cord locking portion and the control connecting portion are provided by recessing the required portion of the bulged end. An automatic in-pipe repair device, characterized in that a water passage is provided which communicates with the pipe of the body and extends longitudinally in the axial direction of the device. 8. A cord retaining portion for retaining a tow cord on both front and rear ends of the body portion, and a control connecting portion for connecting a control electric cable, an air pipe, etc. on the rear end side. Then, after the repair member is set in the body, it is inserted into the tube buried by the tow line on the front end side, and after the body is expanded and heated, the repair member is attached to the inner wall of the tube. In an automatic pipe repair device that is recovered by pulling out by a tow cord on the end side, a flexible pipe is used for the shaft of the body section so that it can be bent, and the front and rear end sides of the body section are substantially A hemispherical bulging end is formed, and the cord locking portion and the control connecting portion are provided by denting the required portion of the bulging end, and the both bulging ends are A water passage communicating with the tube of the body and extending longitudinally in the axial direction of the apparatus is provided, and the heat generating substrate of the heating means is provided in the body. Pipe automatic repair device which is characterized in that the supporting biasing as is pressed against the barrel inner wall. 9. The in-pipe automatic repair device according to claim 6, wherein the bulged end portion has a warhead shape. 10. The automatic in-pipe repair device according to claim 6 or 7, wherein the bulged end portion is formed by a combination of plate-shaped members.