JP2015171190A - Cable removal device, cable removal method, tube laying method and cable laying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage on a cable while reducing the construction cost, and shortening the operation time.SOLUTION: A cable removal device is used for removing a cable 15 laid in the ground while being housed in troughs Tr1. The cable removal device has a tube 45 provided, at the front end, with an opening for receiving one end of a cable 15, a cable transport device 47 for advancing the tube 45 and pushing the cable 15, while surrounding, into the troughs Tr1, and a filler discharging device 50 connected to the rear end of the tube 45, and taking the filler filling the troughs Tr1 into the tube 45, before being discharged to the outside thereof. Since the tube 45 is advanced, pushed into the troughs Tr1, and the filler filling the periphery of the cable 15 in the troughs Tr1 is taken into the tube 45 and discharged to the outside thereof, the filler around the cable 15 can be removed.

Description

  The present invention relates to a cable removing device, a cable removing method, a pipe laying method, and a cable laying method.

  Conventionally, when laying cables such as power cables and communication cables in the ground, they are damaged by heavy loads when trucks pass through the ground road, or damaged by excavators etc. when civil engineering work is performed To prevent this, the cable is housed in a concrete trough.

  The trough includes a block main body having a “U” -shaped shape with an open top, and a lid member that covers an open portion above the block main body. When laying the cable in the ground, the ground is cut at a predetermined depth along the route for laying the cable to form a groove, and the block main body is arranged in the groove, and then in the block main body. After the cable is extended, the lid member is placed on the block body. In addition, even if the trough is broken, the block body is filled with sand so as to surround the cable so that the earth and sand on the trough will not enter the trough and the road will collapse. (See Patent Document 1).

  By the way, when a cable is aged or damaged for some reason, it is removed or replaced with a new cable. In that case, the operator cuts the ground, removes the lid member from the block body, removes the sand in the block body and removes the cable, or lays a new cable after removing the cable.

JP 2011-61997 A

  However, in the conventional cable removal method, it is necessary to open the ground along the route where the cable is laid, remove the lid member from the block body, and remove the sand after removing the sand in the block body. Because there is, work is troublesome. Moreover, since it is necessary to process the residual soil etc. which arise with excavation, a construction cost will become high. Furthermore, since it is necessary to refill the ground after the cable is removed or replaced, not only the work time is lengthened, but also a traffic jam occurs when the ground is cut along the road.

  Moreover, when removing a cable filled with an insulating material such as oil inside, if the cable is damaged due to an external force applied, the insulating material may leak out, in which case the environment is contaminated.

  The present invention solves the problems of the conventional cable removal method, lowers the construction cost, shortens the working time, does not cause traffic congestion, and the cable is damaged. It is an object of the present invention to provide a cable removing device, a cable removing method, a pipe laying method, and a cable laying method that can prevent the above.

  The cable removal device of the present invention is used to remove a cable laid in the ground while being accommodated in a trough.

  And a tube having a predetermined length and having an opening for taking in one end of the cable at the front end, and a cable for moving the tube forward and pushing it into the trough while surrounding the cable A conveying device and a filler discharging device connected to the rear end of the pipe body, taking in the filler filled around the cable in the trough, and discharging the filler out of the pipe body.

  According to the present invention, the cable removal device is used to remove a cable laid in the ground while being accommodated in a trough.

  And a tube having a predetermined length and having an opening for taking in one end of the cable at the front end, and a cable for moving the tube forward and pushing it into the trough while surrounding the cable A conveying device and a filler discharging device connected to the rear end of the pipe body, taking in the filler filled around the cable in the trough, and discharging the filler out of the pipe body.

  In this case, the tubular body is advanced and pushed into the trough, and the filler filled around the cable in the trough is taken into the tubular body and discharged out of the tubular body. Can be removed.

  Therefore, it is not necessary to remove the cable after excavating the ground along the route where the cable is laid, removing the lid member from the block body, and removing the sand in the block body, thus simplifying the work. can do. Moreover, since it is not necessary to process the residual soil etc. which arise with excavation, a construction cost can be reduced. Moreover, it is not necessary to backfill the ground after removing or replacing the cable, so not only can the work time be shortened, but traffic congestion is not caused even when working along the road. .

  Furthermore, when replacing a cable with a new cable, the new cable can be laid by simply connecting the cable to be removed and the new cable and pulling out the cable to be removed from the tube. Therefore, the construction cost for exchanging the cable can be reduced.

  And since an external force is not added to a cable, it can prevent that a cable is damaged. Therefore, when removing a cable filled with an insulating material such as oil, the cable is not damaged and the environment is not polluted.

It is a conceptual diagram which shows the cable removal apparatus in the 1st Embodiment of this invention. It is a conceptual diagram which shows the laying state of the cable in the 1st Embodiment of this invention. It is a perspective view of a trough in a 1st embodiment of the present invention. It is sectional drawing of the trough in the 1st Embodiment of this invention. It is a perspective view which shows the attachment in the 1st Embodiment of this invention. It is a 1st conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a 2nd conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a 3rd conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a 4th conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a 5th conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a 6th conceptual diagram for demonstrating the cable removal method in the 1st Embodiment of this invention. It is a principal part perspective view of the tubular body in the 2nd Embodiment of this invention. It is a perspective view of the attachment in the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  2 is a conceptual diagram showing a cable laying state in the first embodiment of the present invention, FIG. 3 is a perspective view of a trough in the first embodiment of the present invention, and FIG. 4 is a first embodiment of the present invention. It is sectional drawing of the trough in the form of.

  In the figure, 11 is the ground, 12 is a road formed on the ground 11, Tri (i = 1, 2,..., N) is a concrete trough, and 15 is extended and accommodated in the trough Tri. A cable 16 such as a power cable and a communication cable laid in the ground in the state is sand as a filler filled around the cable 15 in the trough Tri. Each trough Tri has a length of 1 to 2 [m] and is buried in the ground adjacent to each other to form a trough row 17.

  The trough Tri includes a block main body 18 having a “U” shape with an open top, and a lid member 19 having a plate shape and covering the opening Mt at the upper end of the block main body 18. The block body 18 includes a bottom wall portion 21 extending in the horizontal direction, and side wall portions 22 and 23 formed so as to be parallel to each other from both edges of the bottom wall portion 21, and an upper end of each side wall portion 22 and 23. On the inner side, locking portions 25 and 26 are formed.

  In addition, the lid member 19 includes locked portions 28 and 29 that are locked to the locking portions 25 and 26 at the lower portions of both edges, and the locked portions 28 and 29 and the locking portions 25 and 26. Is held by the block body 18, the opening Mt is closed, and a cable housing space Ca for housing the cable 15 is formed between the block body 18 and the lid member 19. In the state where the lid member 19 is held by the block body 18, the upper ends of the side wall portions 22 and 23 and the top surface of the lid member 19 are flush with each other, and the top wall portion of the trough Tri is made flat. In the present embodiment, one lid member 19 is arranged for one block body 18, but a plurality of lid members 19 are arranged for one block body 18. Can do.

  The distance from the ground 11 to the trough Tri of the trough Tri, that is, the burial depth, is 1.2 [m], for example, in an area directly under the road 12 that receives a large load such as a vehicle. In other areas, for example, it is set to 0.6 [m].

  The cable 15 includes a single-core cable composed of a single wire, a two-core cable formed by twisting a plurality of wires, a three-core cable, etc. The cable 15 is supported in a state in which the cable 15 is surrounded by the filled sand 16 in the trough Tri.

  By the way, when the cable 15 is aged or damaged for some reason, it is removed or replaced with a new cable. In that case, the ground 11 is cut, the lid member 19 is removed from the block body 18, the sand 16 in the block body 18 is removed, the cable 15 is removed, or the cable 15 is removed and then a new cable is removed. When trying to lay, the work for removal or replacement is troublesome. Moreover, since it is necessary to process the residual soil etc. which arise with excavation, a construction cost will become high. Moreover, since the ground 11 needs to be backfilled after the cable 15 is removed or replaced, not only the work time is lengthened, but also when the ground is cut along the road 12, a traffic jam occurs. End up.

  Therefore, in the present embodiment, the cable 15 can be removed or replaced while the trough Tri is disposed in the ground without excavating the ground.

  Next, the cable removal device will be described.

  FIG. 1 is a conceptual diagram showing a cable removing device according to a first embodiment of the present invention, and FIG. 5 is a perspective view showing an attachment according to the first embodiment of the present invention.

  In the figure, 15 is a cable, Tr1 is a trough at one end of the trough row 17 (FIG. 2), Ca is a cable housing space, 16 is sand, 31 is a body of the cable 15, that is, a cable body, and 32 is the cable body. Terminals disposed at both ends of the cable main body 31, that is, cable terminals 35 are underground in which the trough Tri is embedded, and 36 is a shaft formed to remove or replace the cable 15.

  Further, 41 is a cable removing device disposed in the shaft 36, 45 has a predetermined length, is made of stainless steel, synthetic resin, etc., and is a medium for taking in and discharging the sand 16 in each trough Tri. It is a tubular body as a discharge pipe.

  The tube body 45 includes a tube body 46 made of a flexible tube, and a tubular body that is detachably attached to the front end of the tube body 46, and pushes away the sand 16 when the tube body 45 is advanced. An attachment 61 as shown in FIG. 5 is provided, which is longer than the length of the cable 15 by a predetermined amount. The outer peripheral surface and the inner peripheral surface of the tube main body 46 are flattened to reduce the frictional force generated between the tube body 45, the cable 15 and the sand 16 when the tube body 45 is advanced. Further, the minimum allowable bending radius of the tube body 46 is set to 2 [m].

  The attachment 61 includes a large diameter portion 61a and a small diameter portion 61b, and an opening 62 for taking the cable 15 into the tubular body 45 at the front end of the small diameter portion 61b. Therefore, the inner diameters of the opening 62 and the tube body 45 are made larger than the outer diameter of the cable 15 by a predetermined amount.

  The cable removing device 41 is disposed in the shaft 36, and is a cable transport device 47 that advances the tube body 45 and pushes it into the trough Tri, or retracts the tube body 45 and pulls it out from the trough Tri. A control unit that is disposed outside the shaft 36 and controls the entire filler discharging device 50 and the cable removing device 41 for taking the sand 16 in the trough Tri into the tube body 45 and discharging it to the tube body 45. 59, an operation unit 60, and the like.

  The cable conveying device 47 includes a plurality of clamping units 49 that clamp the tube body 45 from a predetermined direction, and in this embodiment, two clamping units 49 that clamp the tube body 45 from the left and right, and a transport drive for transporting the tube body 45. A transport motor 51 as a unit is provided.

  Each of the clamping units 49 is connected to the transport motor 51 and is rotated by driving the transport motor 51. The drive-side rotating body (pulley, sprocket, etc.) (not shown) and the drive side in the transport direction of the tube 45 The driven-side rotating body (pulley, sprocket, etc.), which is rotatably arranged at a predetermined distance from the rotating body, and the driving-side rotating body and the driven-side rotating body are stretched. A transmission member 53 (belt, chain, etc.) is provided. When the transport motor 51 is driven in the forward direction, the transmission member 53 is caused to travel in the directions of arrows B and C, whereby the tube body 45 is transported in the direction of arrow A and pushed into the cable housing space Ca. When the transport motor 51 is driven in the reverse direction, the transmission member 53 is caused to travel in the direction opposite to the directions of arrows B and C, whereby the tube body 45 is transported in the direction opposite to the direction of arrow A and from within the cable housing space Ca. Pulled out.

  The filler discharge device 50 sucks air in the tube body 45 and discharges it in the direction of arrow D, and a suction drive unit for operating the suction device 55 in a vacuum state. The pump 56 is provided.

The shaft 36 has a predetermined size so that the cable removing device 41 can be installed and the operator can operate the operation unit 60. For example, the length L, the width W, and Depth D is 5 [m] x 2.5 [m] x 2.2 [m]
To be.

  Next, the cable removal method will be described.

  FIG. 6 is a first conceptual diagram for explaining a cable removal method in the first embodiment of the present invention, and FIG. 7 is a second conceptual diagram for explaining the cable removal method in the first embodiment of the present invention. FIG. 8 is a third conceptual diagram for explaining a cable removal method according to the first embodiment of the present invention, and FIG. 9 is a cable removal method according to the first embodiment of the present invention. FIG. 10 is a fifth conceptual diagram for explaining a cable removal method according to the first embodiment of the present invention, and FIG. 11 is a cable removal according to the first embodiment of the present invention. It is a 6th conceptual diagram for demonstrating a method.

  First, an operator forms shafts 36 and 37 having a predetermined depth at two locations in the vicinity of both ends of the cable 15 to be removed or replaced, and troughs Tr1 and Trn at both ends of the trough row 17 in the shafts 36 and 37. The openings Kh1 and Kh2 are exposed.

  Next, as shown in FIG. 6, in this embodiment, one of the shafts 36 and 37, a cable transport device 47 is installed on the floor surface of the shaft 36, and one end side of the pipe body 45 is connected to the shaft. 36, the attachment 61 is faced to the cable terminal 32 of the cable 15, the pipe body 46 is disposed between the holding units 49, and is sandwiched between the transmission members 53. In addition, the other end side of the pipe body 45 is connected to a suction device 55 (FIG. 1) disposed outside the shaft 36.

  Subsequently, based on the operation of the operation unit 60 by the operator, the control unit 59 drives the transport motor 51 in the forward direction and drives the pump 56. Thereby, in each clamping unit 49 in the cable transport device 47, the driving-side rotating body is rotated, and the transmission member 53 is caused to travel in the directions of arrows B and C as shown in FIG. The rotating body on the side is rotated, and the tube body 45 is conveyed in the direction of arrow A.

  Further, in the filler discharge device 50, a vacuum state is formed, the suction device 55 is operated, and the air in the tube body 45 is sucked and discharged in the direction of arrow D by the suction device 55. Along with this, air around the front end of the tube body 45 is sucked into the tube body 45 in the direction of arrow E.

  Then, as shown in FIG. 8, the pipe body 45 introduces the cable 15 into the opening 62, is guided along the cable 15, is guided by the cable 15, and is conveyed in the direction of arrow A, and passes through the trough Tri. Moved forward. At this time, as the air in the tube body 45 is sucked in the direction of arrow D, the air around the front end of the tube body 45 and the sand 16 are sucked in the tube body 45 in the direction of arrow E. The air and sand 16 sucked into the tube body 45 flows through the annular gap between the tube body 46 and the cable 15, then passes through the terminal 32 portion of the cable 15, and further passes through the tube body 46 in the direction of arrow D. And discharged by the suction device 55.

  Further, as the air around the front end of the tube body 45 and the sand 16 are sucked into the tube body 45 in the direction of arrow E, the air in the shaft 36 is moved from the opening Kh1 of the trough Tr1 into the cable housing space Ca. Enters the vicinity of the outer peripheral surface of the cable 15 in the direction of arrow F.

  In this way, as the tubular body 45 is advanced, a cylindrical space Sc surrounding the tubular body 45 is formed around the tubular body 45 as shown in FIGS.

  Then, as shown in FIG. 10, when the front end of the pipe body 45 reaches the shaft 37, the control unit 59 stops driving the transport motor 51 and the pump 56 based on the operation of the operation unit 60 by the operator. . Thereby, the conveyance of the tube body 45 by each clamping unit 49 in the cable conveyance device 47 is stopped, and the suction of air by the suction device 55 in the filler discharge device 50 is stopped. Subsequently, the operator removes the cable 15 in the pipe body 45 by pulling out the cable 15 in the shaft 37 using a predetermined pulling device.

  When the removal of the cable 15 from the tube body 45 is completed, the control unit 59 drives the transport motor 51 in the reverse direction based on the operation of the operation unit 60 by the operator. Accordingly, as shown in FIG. 11, in each clamping unit 49 in the cable transport device 47, the rotating body on the driving side is rotated in the reverse direction, and the transmission member 53 is moved in the directions indicated by the arrows G and H (B and C directions). The rotating body on the driven side is rotated in the reverse direction, the tube body 45 is conveyed in the I direction (the direction opposite to the arrow A direction), and is pulled out from the trough Tri.

  In the trough Tri after the tube body 45 is removed, a cylindrical gap Sd is formed in a portion where the cable 15 is disposed, and thus the fluidized filler is formed in the gap Sd. In this embodiment, the fluidized soil is filled from one or both of the openings Kh1 and Kh2 of the troughs Tr1 and Trn.

  Subsequently, the operator removes the cable transport device 47 from the shaft 36 and refills the shafts 36 and 37.

  Thus, in the present embodiment, the pipe body 45 is advanced and pushed into the trough Tri, and the sand 16 filled around the cable 15 in the trough Tri is taken into the pipe body 45. Since it is discharged out of the pipe body 45, when the pipe body 45 reaches the shaft 37, the sand 16 around the cable 15 is removed.

  Therefore, when the cable 15 is removed, it is not necessary to open the ground and remove the sand in the block body 18 after removing the lid member 19 (FIG. 2) from the block body 18, thus simplifying the operation. be able to. Moreover, since it is not necessary to process the residual soil etc. which arise with excavation, a construction cost can be reduced. Moreover, since it is not necessary to refill the ground after the cable 15 is removed or replaced, not only can the work time be shortened, but also traffic congestion can occur even when working along the road. Absent.

  Further, when the cable 15 is replaced with a new cable, the new cable can be laid by simply connecting the cable 15 to be removed and the new cable and pulling out the cable 15 to be removed from the tube body 45. Therefore, the construction cost for exchanging the cable can be reduced.

  Since no external force is applied to the cable 15, the cable 15 can be prevented from being damaged. Therefore, when the cable 15 filled with an insulating material such as oil is removed, the cable 15 is not damaged and pollutes the environment.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the same code | symbol is provided and the effect of the same embodiment is used about the effect of the invention by having the same structure.

  FIG. 12 is a perspective view of a main part of a tubular body according to the second embodiment of the present invention.

  In the figure, reference numeral 145 denotes a tube body as a medium discharge tube having a double tube structure, and the tube body 145 includes a tube body 146 and an attachment 161.

  The tube main body 146 includes an outer tube 147 and an inner tube 148 disposed inside the outer tube 147, and a first air supply comprising an annular gap between the outer tube 147 and the inner tube 148. Part 150 is formed. The attachment 161 includes an outer casing 165 and an inner casing 166 disposed on the inner side of the outer casing 165, and a second air having an annular gap between the outer casing 165 and the inner casing 166. A supply unit 151 is formed. The outer casing 165 includes a large diameter portion 165a and a small diameter portion 165b.

  Then, with the attachment 161 attached to the tube main body 146, the outer tube 147 and the outer housing 165 are connected, and the inner tube 148 and the inner housing 166 are connected, so that the first and second air supplies are connected. The portions 150 and 151 are communicated with each other, and the space inside the inner tube 148 and the space inside the inner casing 166 are communicated.

  The attachment 161 is formed at the front end by the inner casing 166, has a circular shape, has an inner opening 162 for taking in the cable 15 (FIG. 1), and has an outer casing 165 and an inner casing. And an annular opening 163 for discharging air.

  Further, the first air supply unit 150 is connected to the suction device 55 at the rear end of the tube body 145, and the air separated from the sand 16 as the filler in the suction device 55 is the first air supply unit. 150.

  Therefore, since the air supplied from the suction device 55 flows through the first and second air supply units 150 and 151 and is discharged from the opening 163, the sand 16 around the front end of the tube body 145 is discharged from the opening 163. The air is dispersed and sucked into the tube body 145 together with the air.

  Thus, since the sand 16 ahead of the attachment 161 is sucked into the tube body 145 when the tube body 145 is advanced, the tube body 145 can be smoothly advanced.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 2nd Embodiment, the same code | symbol is provided and the effect of the embodiment is used about the effect of the invention by having the same structure.

  FIG. 13 is a perspective view of an attachment according to the third embodiment of the present invention.

  In this case, slits 168 extending in the axial direction are formed at equal pitches at a plurality of locations in the circumferential direction of the outer peripheral surface of the small diameter portion 165b.

  Therefore, since the air supplied from the suction device 55 flows through the first and second air supply units 150 and 151 and is discharged from the opening 163 and each slit 168, the sand 16 around the front end of the tube 145 is It is dispersed by the air discharged from the opening 163 and the slit 168 and is sucked into the tube body 145 together with the air.

  As a result, when the tube body 145 is advanced, the sand 16 on the front and side of the attachment 161 is sucked into the tube body 145, so that the tube body 145 can be smoothly advanced.

  In each of the above-described embodiments, when the cable 15 is removed from the tubular bodies 45, 145, the tubular bodies 45, 145 are removed from the trough Tri. However, the tubular bodies 45, 145 are removed from the trough Tri. Can remain inside. That is, the pipe bodies 45 and 145 can be laid by leaving the pipe bodies 45 and 145 in the trough Tri.

  Further, after the cable 15 is removed from the pipe bodies 45 and 145, a new cable can be laid by inserting the new cable into the pipe bodies 45 and 145.

  Furthermore, the cable 15 can be exchanged by laying a new cable at the same time as the cable 15 is removed from the tubes 45 and 145. In that case, the cable 15 and the new cable in the pipe bodies 45 and 145 are connected, and a new cable is laid by removing the cable 15, and the cable 15 is replaced. Further, the fluidized soil is filled in a cylindrical space Sc formed around the pipe bodies 45 and 145.

  The present invention is not limited to the above embodiments, and various modifications can be made based on the gist of the present invention, and they are not excluded from the scope of the present invention.

15 Cable 16 Sand 41 Cable removal device 45, 145 Tube 47 Cable transport device 50 Filler discharge device 62, 162 Open Tri trough

Claims (10)

In the cable removal device for removing the cable laid in the ground while being housed in the trough,
(A) a tube having a predetermined length and having an opening for taking in one end of the cable at the front end;
(B) a cable transport device for advancing the tube and pushing it into the trough in a state of surrounding the cable;
(C) A cable removal device comprising: a filler discharging device connected to a rear end of the tube body, which takes in the filler filled around the cable in the trough and discharges the filler to the outside of the tube body apparatus.   The cable removing device according to claim 1, wherein the filler discharging device includes a suction device that sucks air around a front end of the tubular body.   The cable removing device according to claim 1, wherein the tubular body is formed of a flexible tube. (A) The tube has a double tube structure including an outer tube and an inner tube,
(B) The cable removal device according to any one of claims 1 to 3, wherein an air supply part for discharging air from an opening at a front end of the attachment is formed between the outer tube and the inner tube.   The cable removal device according to claim 4, wherein a slit for discharging air is formed on an outer peripheral surface of a front end portion of the attachment. In the cable removal method for removing the cable laid in the ground while being housed in the trough,
(A) A tube having a predetermined length and having an opening for taking in one end of the cable at the front end is advanced, and is pushed into the trough while surrounding the cable.
(B) A method for removing a cable, characterized in that a filler filled around the tubular body in the trough is taken into the tubular body and discharged out of the tubular body.   The cable removing method according to claim 6, wherein the filler around the front end of the tubular body is taken into the tubular body by sucking air around the front end of the tubular body. (A) A tubular body having a predetermined length and having an opening at the front end is advanced and pushed into a trough arranged in the ground,
(B) A method of laying a tube body, wherein the filler filled around the tube body in the trough is taken into the tube body and discharged out of the tube body. (A) A tubular body having a predetermined length and having an opening at the front end is advanced and pushed into a trough arranged in the ground,
(B) The filling material filled around the tubular body in the trough is taken into the tubular body and discharged out of the tubular body.
(C) A cable laying method characterized by laying a cable in a pipe. (A) connecting the cable in the tube and a new cable;
(B) The cable laying method according to claim 9, wherein a new cable is laid by removing the cable in the tube.

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