JP2013085380A - Auxiliary device for removing cable-in-pipe and cable-in-pipe removal system equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary device for removing a cable in a pipe, capable of achieving dissolution of fixing between a cable in an underground pipe and an inner surface of a pipe conduit, also mechanically in addition to jetting of high pressure water without requiring repetition thereof.SOLUTION: A housing basket 11 assists in work of a cable-in-pipe removal system jetting high pressure water from an injection nozzle 101 to around a communication cable C in an underground pipe P. A tip side cylindrical part 12 formed with an outer diameter enabling it to be inserted into the underground pipe P and having an inner diameter into which the cable can be inserted and a rear side annular part are connected with each other by a plurality of coupling rods 14. In the tip side cylindrical part, an immovable part 21 to which the coupling rods are fixed and a slide contact rotation part 22 connected in a relatively rotatable manner are assembled. Inclined plates 25 receiving high pressure water are fixed at a plurality of positions on the inner surface of the slide contact rotation part, and sawtooth-shaped comminution teeth 22b are formed on the tip side of the slide contact rotation part 22.

Description

  The present invention relates to an in-pipe cable removal assisting device and an in-pipe cable removal system including the device, and more particularly, to a device that can eliminate the sticking of a cable laid in the pipe and facilitate the removal operation.

  In recent years, undergrounding of various cables has been promoted, and when it is necessary to lay again such as when the existing cable is nearing its end of life, the work of removing the existing cable from the underground pipe (pipe) is first performed. . For the removal of this existing cable, we would like to use a method of pulling the existing cable from the underground pipe using a winch or the like and laying it again using a manhole.

  However, underground pipes laid with this existing cable often have soil components infiltrated into deposits even if they are sealed, and the deposits fix the cables to the inner surface of the pipeline. Making it impossible to withdraw. For this reason, the replacement of the existing cable in the underground pipe is generally performed because it is certain that the place where the underground pipe is buried is dug up and the work is performed.

  Therefore, in the replacement work of the existing cable in the underground pipe, for example, in Patent Document 1, the nozzle connected with the water jet pump is inserted into the underground pipe, and the high-pressure water is ejected and the waste water is sucked and collected. It has been proposed that the existing cable can be recovered and removed with high-pressure water while eliminating the sticking of the existing cable due to sediment in the underground pipe.

  Further, in Patent Document 2, an existing cable is formed by deposits in a underground pipe by attaching a water jet pump to a moving device with a caterpillar capable of traveling in the underground pipe and ejecting high-pressure water forward from the nozzle. It has been proposed that the existing cable can be cut and recovered / removed by spraying the high-pressure water while rotating toward the inner surface of the underground conduit simultaneously with the elimination of the sticking.

  Further, in Patent Document 3, a moving body that accommodates a short cable after cutting is attached to the front side of the moving device with a caterpillar, so that the moving device is retracted every time a certain amount of the short cable is accommodated. Therefore, it has been proposed to realize recovery / removal by cutting existing cables.

JP 2003-309912 A JP-A-6-245342 Japanese Patent Laid-Open No. 7-154910

  However, in the recovery / removal of the existing cable as described in Patent Document 1, it is possible to loosen the sediment clogged forward and make it penetrate by simply jetting high-pressure water forward. In a state where the front is open, the high-pressure water passes through the front as it is, and the deposit that fixes the cable to the inner surface of the pipe cannot be effectively destroyed. For this reason, there are many cases where the cable cannot be peeled off even if it is forcibly pulled out from the underground pipe. If the cable is forcibly pulled out, the cable may be cut off halfway and become uncollectable. In this case, as a result, similar to the conventional case, the underground pipe is dug and the existing cables are replaced.

  Moreover, in the thing of patent document 2, even if it hits a cable with a high voltage | pressure water, since the cable itself is a hard thing, it is difficult to cut | disconnect and there is a possibility of damaging the underground pipe itself. There is.

  Furthermore, in the thing of patent document 3, in addition to being difficult to cut | disconnect the cable in an underground pipe itself, if a moving apparatus is retracted every time a fixed quantity is accommodated, efficiency is bad, and long-distance pipe | tube Since roads exist, it is not realistic.

  Accordingly, the present invention provides an in-pipe cable removal auxiliary device and an in-pipe cable that can be fixed mechanically without repeating, in addition to the spraying of high-pressure water, in order to eliminate the fixation of the cable in the underground pipe with the inner surface of the pipe line. To provide a removal system.

  One aspect of the invention of an in-pipe cable removal assisting device that solves the above problem assists the cable removal work of the in-pipe cable removal system that ejects liquid around the cable laid in the duct and removes the cable. A cylindrical member having an outer diameter that can be inserted into the pipe and having an inner diameter through which the cable can be inserted; and And a rotating member that rotates at least the tip of the cylindrical member around an axis by receiving an injection pressure.

  In the aspect of the present invention, when liquid is jetted around the cable so that the rotating member receives the jetting pressure while the cable laid in the pipe is passed through the cylindrical member, at least the tip of the cylindrical member The part is rotated around the axis. Therefore, the deposit that fixes the cable to the inner surface of the pipeline is broken (relaxed) by the injection pressure of the high-pressure liquid, and the tip of the cylindrical member is mechanically slidably contacted to eliminate the cable. Can do.

  As described above, according to one aspect of the present invention, the high-pressure liquid is injected from the end of the underground pipe into the cylindrical member through the existing cable, and only advanced to the opposite side (both ends of the underground pipe). The cable that adheres to the inner surface of the pipe line can be released. Therefore, the released cable can be easily pulled out from the underground pipe and recovered and removed, and the cable can be newly laid in the existing underground pipe at a low cost without digging up the underground pipe. it can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the in-pipe cable removal system which employ | adopts the in-pipe cable removal auxiliary | assistance apparatus based on this invention, (a) is a longitudinal cross-sectional view which shows the basic composition of the in-pipe cable removal system, (b) is it It is a longitudinal cross-sectional view which shows the structure which added the accommodation basket which is an in-pipe cable removal auxiliary | assistance apparatus. It is a figure which shows the principal part structure of the accommodation basket, (a) is the side view seen from the horizontal direction with respect to the advancing direction, (b) is the front view seen from the advancing direction side. It is a cross-sectional top view which shows the front end side structure of the accommodation basket. It is an inner surface top view which shows the front end side structure of the accommodation basket. It is a side view which shows the rear end side structure of the accommodation basket. It is a figure which shows 2nd Embodiment of the in-pipe cable removal system which employ | adopts the in-pipe cable removal auxiliary | assistance apparatus based on this invention, and is seen from the horizontal direction with respect to the advancing direction of the rear-end side structure which is the in-pipe cable removal auxiliary | assistance apparatus. FIG. It is a figure which shows 3rd Embodiment of the in-pipe cable removal system which employ | adopts the in-pipe cable removal auxiliary | assistance apparatus based on this invention, and is seen from the horizontal direction with respect to the advancing direction of the rear-end side structure which is the in-pipe cable removal auxiliary | assistance apparatus. FIG. It is a top view which shows the principal part components.

  One aspect of the embodiment of the present invention is an apparatus that assists the cable removal operation of the in-pipe cable removal system that ejects liquid around the cable laid in the pipeline and removes the cable. A cylindrical member having an outer diameter that can be inserted into a pipe and having an inner diameter through which the cable can be inserted; and a circular member that is provided at a circular portion of the cylindrical member and receives the jetting pressure of the liquid In addition to the rotating member that rotates at least the tip of the cylindrical member about the axis, the following configuration may be provided. Further, the in-pipe cable removal assisting device may constitute an in-pipe cable removal system together with an injection member for injecting liquid around the cable laid in the pipe line.

  As a first other aspect, the in-pipe cable removal system includes a liquid jet nozzle that is inserted along the cable in the pipe line, whereas a connection member that is connected to the vicinity of the liquid jet nozzle is provided. The liquid injection nozzle may be inserted into the pipeline together with the insertion into the pipeline.

  In this aspect, the cylindrical member can be connected to the liquid jet nozzle and can enter the underground pipe where the existing cable is laid together, and the difference between the liquid jet nozzles is not required without requiring any means for moving. The cylindrical member can be moved in the underground pipe together with the insert.

  As a second other aspect, the cylindrical member may be formed in a cage shape that allows the liquid to flow between the outer surface side and the inner surface side.

  In this aspect, the liquid can be circulated from the inner surface side to the outer surface side of the cylindrical member, and conversely from the outer surface side to the inner surface side, and the jet liquid can flow in the underground pipe without hindering the jet of the liquid. The deposits can be broken by spraying on the inner surface of the pipe.

  As a third other aspect, the cylindrical member may be provided with a pulverized tooth on the front side in the entry direction in the pipeline to scrape the deposit between the cable and the inner surface of the pipeline. .

  In this aspect, the deposit that fixes the cable to the inner surface of the pipe line can be effectively broken by sliding the crushing teeth of the cylindrical member, and the liquid jet nozzle can be smoothly advanced.

  As a fourth other aspect, the cylindrical member may include a holding member that holds the cable so as to be separated from the inner surface of the pipe line on the rear side in the entry direction in the pipe line. Good.

  In this aspect, the cable released from the fixing with the inner surface of the pipe line can be supported by the holding member, and even when it cannot be pulled out immediately, it is possible to restrict the fixing with the inner surface of the pipe line again.

  As a fifth other aspect, the cylindrical member may be provided with a brush in sliding contact with the inner surface of the duct on the outer peripheral surface side.

  In this aspect, the brush can be slid in contact with the deposit on which the cable is fixed to the inner surface of the pipe, and more of the deposit can be peeled off from the inner surface of the pipe. The inner surface can be cleaned.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1-5 is a figure which shows 1st Embodiment of the in-pipe cable removal system which employ | adopts the in-pipe cable removal auxiliary | assistance apparatus based on this invention.

  In FIG. 1, the in-pipe cable removal system 10 is inserted into the underground pipe P, which is buried so as to connect the manholes M and the communication cable C is laid, from the one end side opening Pa, and the other end side. In addition to the basic configuration of the injection nozzle (injection member) 101, the suction hose 108, and the observation camera 109 that enter the opening Pb, the housing basket (cylindrical member) 11 that constitutes the in-pipe cable removal assisting device is connected and connected together. It is designed to be inserted into the underground pipe P. Needless to say, the injection nozzle 101 may be inserted and inserted from both ends Pa and Pb of the underground pipe P.

  As shown in FIG. 1A, the basic configuration of the in-pipe cable removal system 10 is such that the injection nozzle 101 is rotatably attached to the tip of the tube member 102, and the tube member 102 is deformed into a refracting form. It is difficult and is formed of a resin material having a rigidity that can be easily bent, and a high-pressure water supply device (not shown) is connected to the rear end side.

  As a result, the tube member 102 is not bent when the tube member 102 is inserted into the underground pipe P from the one end side opening Pa and hinders the insertion, and the other end while maintaining the injection nozzle 101 at the head. It is easily realized to move to the side opening Pb. Further, since the tube member 102 tends to be linear due to the water pressure when the high-pressure water W is supplied, the tube member 102 can be inserted into the underground pipe P more easily without being bent.

  Although not shown in the drawing, the injection nozzle 101 is configured to blow out the high-pressure water W supplied to the tube member 102 from a plurality of injection ports 101a that open to the tip surface, and the injection direction of the injection ports Is inclined in an oblique direction with respect to the extending direction of the tube member 102 (the front end surface of the injection nozzle 101).

  Thereby, the injection nozzle 101 can be rotated in the underground pipe P by applying a rotational force by the injection pressure (discharge pressure) of the high-pressure water W to be injected. The adhesion force can be weakened by spraying on and depositing sediment S (see FIG. 2) such as soil component s between (around) the communication cable C on the inner surface.

  The suction hose 108 is made of the same material as the tube member 102, and a suction device (not shown) is connected to the rear end side, and the tip side of the injection nozzle 101 is parallel to the tube member 102. Insert it into the underground pipe P while keeping it behind.

  As a result, the suction hose 108 can suck and collect the high-pressure water jetted from the jet nozzle 101 or the soil component s that has destroyed the deposit S that flows backward in the underground pipe P. A large amount of treated water can be prevented from getting out of the way.

  The observation camera 109 has a waterproof function and is arranged at the tip of the signal wire D having the same rigidity as the tube member 102. The observation camera 109 is inserted into the underground pipe P before the injection nozzle 101 is inserted. It is possible to grasp a clogged portion due to the deposit S by taking an image, or to enter the underground pipe P from the opposite side of the injection nozzle 101 or the like to observe the presence or absence of penetration.

  And as an additional structure of the in-pipe cable removal system 10, as shown in FIG.1 (b), it is the injection nozzle so that the accommodation basket 11 may become the form which accommodates the injection nozzle 101 of the tube member 102 front-end | tip inside. 101, it is approached together toward the other end side opening Pb from the one end side opening Pa of the underground pipe P, maintaining the form.

  As shown in FIG. 2, the accommodation basket 11 has an outer diameter that can be inserted into the underground pipe P, and a cylindrical shape that has an inner diameter that can be connected in a form in which the injection nozzle 101 is inserted and accommodated therein. It is produced by welding a steel material or the like in a cage shape, and by connecting a plurality of connecting rods 14 between the front end side cylindrical portion 12 and the rear end side annular portion 13 (see FIG. 5), The inside and outside of the cylindrical portion 12 and the annular portion 13 are opened so that they can communicate with each other, and the slit 14a between the connecting rods 14 can communicate with the inside and outside.

  Thereby, the accommodation basket 11 directs the high-pressure water W ejected from the ejection port 101a by the ejection nozzle 101 to be accommodated toward the inner surface of the underground pipe P from the opening of the distal end side cylindrical portion 12 and the slit 14a between the connecting rods 14. The function of the basic configuration of the in-pipe cable removal system 10 can be ensured without blocking the spraying.

  Here, the injection nozzle 101 is assembled such that the injection rotating portion 103 in which the injection port 101a is disposed and the connecting portion 104 to which the tube member 102 is connected are rotatable relative to each other. It is fixed to the connecting rod 14 by a belt member (connecting member) 106 through a thick spacer 105.

  As a result, the injection nozzle 101 is fixed at a position where the connecting portion 104 is separated from the connecting rod 14 by the thickness of the spacer 105, thereby connecting the housing basket 11 to the tube member 102 and the injection rotating portion 103. The free rotation is ensured by the injection pressure from the injection port 101a without contacting the connecting rod 14 or the like. Further, the housing basket 11 can be caused to enter the underground pipe P together with the injection nozzle 101 by the tube member 102 without using any power.

  Further, the cylindrical portion 12 on the front end side of the housing basket 11 has a stationary portion 21 to which the connecting rod 14 is fixed, and a slide that is positioned on the distal end side relative to the stationary portion 21 and is coaxially and relatively rotatably connected. The contact rotating part 22 is assembled. As shown in FIG. 3, the housing basket 11 is integrally formed with an inwardly folded disc-shaped portion 21 a that extends inwardly on the front end side of the immovable portion 21, and the rear end side of the sliding contact rotating portion 22. Are formed in a flange shape and integrally formed with an outwardly-folded disk-shaped portion 22a, and these disk-shaped portions 21a and 22a are formed to have inner and outer diameters that can be assembled in a face-to-face state. Further, in the non-moving portion 21, protruding members 23 are fixed by welding or the like at a plurality of locations in the circumferential direction on the opposite side of the inner folding disc-shaped portion 21a sandwiching the outer folding disc-shaped portion 22a of the sliding contact rotating portion 22. .

  As shown in FIG. 4, the distal end side cylindrical portion 12 is provided with inclined plates (rotating members) 25 that are inclined with respect to the axial direction on the inner surface of the sliding contact rotating portion 22 at a plurality of locations by welding or the like. The high pressure water W (injection pressure) injected from the injection port 101a of the injection nozzle 101 is set so as to be received by the inclined surface 25a.

  Further, the distal end side cylindrical portion 12 includes grinding teeth 22b in which the end surface on the distal end side of the sliding contact rotating portion 22 is formed in a sawtooth shape.

  As a result, the stationary basket 11 is connected to the stationary portion 21 (connecting rod 14) of the front end side cylindrical portion 12 so as not to rotate relative to the coupling portion 104 of the injection nozzle 101, and is slidably rotated with respect to the stationary portion 21. When the portion 22 is held in a relatively rotatable and non-detachable manner and the in-pipe cable removal system 10 injects the high-pressure water W from the injection port 101a of the injection nozzle 101, the inclined plate 25 on the inner surface of the sliding contact rotation portion 22 is used. Receives the injection pressure of the high-pressure water W. For this reason, the housing basket 11 can relatively rotate the sliding contact rotating part 22 in the direction of escaping from the injection pressure of the high-pressure water W, as indicated by an arrow in the figure, and the crushing teeth 22b on the end side on the tip side can be rotated. It can be rotated in the circumferential direction.

  Therefore, the in-pipe cable removal system 10 fixes the injection nozzle 101 in the accommodation basket 11 and puts the end of the existing communication cable C in the underground pipe P into a state where it is inserted. The nozzle 101) can be inserted into the underground pipe P together with the suction hose 108, and can be advanced to the back of the underground pipe P while injecting high-pressure water W from the injection port 101a of the injection nozzle 101.

  At this time, the jet rotation part 103 of the jet nozzle 101 rotates by the jet pressure of the high-pressure water W jetted from the jet port 101a, and the high-pressure water W is applied to the communication cable C on the inner surface of the underground pipe P and the deposit S around it. In addition to weakening the adhering force such as spraying and pulverizing the housing basket 11, the sliding contact rotating portion 22 can be rotated by receiving the injection pressure of the high-pressure water W by the inclined plate 25, and the underground pipe P The crushing teeth 22b on the front end side of the sliding contact rotating part 22 can be mechanically slidably contacted with the deposit S existing between the inner surface and the communication cable C and effectively pulverized.

  For this reason, the communication cable C can be reliably released from the fixing even in a place where the fixing with the inner surface of the underground pipe P cannot be eliminated only by the high-pressure water W, and the injection nozzle 101 is smoothly grounded. It is possible to advance toward the back in the pipe P.

  As shown in FIG. 5, the housing basket 11 is provided with a pulling portion 26 on the rear end side annular portion 13, and by connecting a pulling wire 27 to the pulling portion 26, The accommodation basket 11 and the injection nozzle 101 can be pulled together and collected, and it is possible to avoid damage to the connection portion between the connection portion 104 of the injection nozzle 101 and the tube member 102.

  Thus, in this embodiment, it can be sent to the opposite side while injecting the high-pressure water W from the injection port 101a of the injection nozzle 101 through the existing communication cable C from the end of the underground pipe P into the housing basket 11, At this time, even if the communication cable C is fixed to the inner surface of the underground pipe P by the deposit S, in addition to the high-pressure water W, the crushing teeth 22b rotating at the tip of the accommodation basket 11 assist the deposit. The object S can be reliably pulverized and released. Therefore, the existing communication cable C laid in the underground pipe P can be reliably pulled out and collected and removed, and the communication cable C can be newly laid again at low cost by using the underground pipe P again as it is. it can.

  Next, FIG. 6 is a figure which shows 2nd Embodiment of the in-pipe cable removal system which employ | adopts the in-pipe cable removal auxiliary | assistance apparatus based on this invention. Here, since the present embodiment is configured in substantially the same manner as the above-described embodiment, the same components are denoted by the same reference numerals and the characteristic portions will be described (in other embodiments described below). The same).

  In FIG. 6, the housing basket 11 of the in-pipe cable removal system 10 is provided with traction portions 26 at at least two places on the rear end side annular portion 13, and the traction portion 26 has a flexible wire 32. Temporary placing members (holding members) 31 are coupled together in a ladder shape. The temporary placement member 31 has the same length as the tube member 102 and the suction hose 108 and extends in the underground pipe P.

  As a result, in the in-pipe cable removal system 10, the temporary placement member 31 places the communication cable C released from the fixed to the inner surface of the underground pipe P and discharged from the rear end side annular portion 13 of the housing basket 11 on the temporary placement member 31. Can be held in a state.

  As described above, in this embodiment, in addition to the operational effects of the above-described embodiment, the communication cable C before being pulled out can be held on the temporary placement member 31, and the soil component s of the deposit S remains. Since the outer skin is aged, it is possible to prevent the communication cable C from re-adhering to the inner surface of the underground pipe P. Therefore, even when the communication cable C is pulled out at a later date, the communication cable C is reliably recovered and removed by easily performing the pull-out operation while avoiding re-adhering to the inner surface of the underground pipe P. can do.

  Next, FIG. 7 and FIG. 8 are views showing a third embodiment of the in-pipe cable removal system that employs the in-pipe cable removal assisting device according to the present invention.

  In FIG. 7, the housing basket 11 of the in-pipe cable removal system 10 has a wire brush 41 fixed to the rear end side annular portion 13, and, for example, a wire outward from the core wire 42 as shown in FIG. The wire 43 is fixed only by winding the wire brush 41 from which the wire 43 protrudes.

  As a result, the in-pipe cable removal system 10 can bring the wire brush 41 into sliding contact with the inner surface of the underground pipe P when the housing basket 11 is advanced to the back of the underground pipe P, and the remaining deposit S The soil component s and the like can be peeled off from the inner surface to eliminate sticking.

  As described above, in this embodiment, in addition to the operational effects of the above-described embodiment, the work of cleaning by inserting the cleaning tool into the underground pipe P again after the communication cable C is pulled out can be reduced or omitted. it can. Therefore, the work after the communication cable C is pulled out can be reduced, the work cost can be reduced, and the work time can also be reduced.

  Here, in this embodiment, the case where the wire brush 41 is fixed to the rear end side annular portion 13 of the housing basket 11 will be described as an example. However, the present invention is not limited to this. For example, the wire brush 41 is housed. You may make it clean the inner surface of the underground pipe P, fixing to the outer surface of the sliding contact rotation part 22 of the front end side of the basket 11, and rotating.

  The scope of the present invention is not limited to the illustrated and described exemplary embodiments, but includes all embodiments that provide the same effects as those intended by the present invention. Further, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but may be defined by any desired combination of particular features among all the disclosed features. .

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 10 In-pipe cable removal system 11 Accommodation basket 21 Non-moving part 22 Sliding contact rotation part 22b Grinding tooth 25 Inclined plate 26 Pulling part 27 Pulling wire 31 Temporary placing member 41 Wire brush 101 Injection nozzle 101a Injection port 102 Tube member 103 Injection rotation part 104 Connection Part 105 Spacer 106 Belt member 108 Suction hose 109 Observation camera C Communication cable M Manhole P Underground pipe S Deposit W High pressure water

Claims (7)

A device that assists the cable removal operation of the in-pipe cable removal system that ejects liquid around the cable laid in the pipeline and removes the cable,
A cylindrical member that has an outer diameter that can be inserted into the pipe and has an inner diameter that allows the cable to be inserted therein, and is provided at a circular portion of the cylindrical member to receive the injection pressure of the liquid. And a rotating member that rotates at least the tip of the cylindrical member about the axis thereof. Whereas the in-pipe cable removal system includes a liquid jet nozzle that is inserted along the cable in the pipe line,
The in-pipe cable according to claim 1, further comprising a connecting member connected in the vicinity of the liquid jet nozzle, and entering the pipe together with the insertion of the liquid jet nozzle into the pipe. Removal assist device.   The in-pipe cable removal assisting device according to claim 1 or 2, wherein the cylindrical member is formed in a cage shape that allows the liquid to flow between an outer surface side and an inner surface side.   The said cylindrical member is provided with the grinding | pulverization tooth | gear which crushes the deposit between the said cable and the inner surface of the said pipe line in the front side of the approach direction in the said pipe line. In-pipe cable removal assisting device as described in 1.   5. The cylindrical member is provided with a holding member for holding the cable so as to be separated from the inner surface of the pipe line on the rear side in the entry direction in the pipe line. The in-pipe cable removal auxiliary device according to any one of the above.   The in-pipe cable removal assisting device according to any one of claims 1 to 5, wherein the cylindrical member is provided with a brush in sliding contact with an inner surface of the pipe line on an outer peripheral surface side.   An in-pipe cable removal system comprising the in-pipe cable removal assisting device according to any one of claims 1 to 6 together with an injection member that injects a liquid around a cable laid in the pipe line.

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