JP2009061427A - Water spray device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water spray device capable of efficiently crushing a deposit deposited on a part for laying a cable in a pipe. <P>SOLUTION: The water spray device which is inserted into a pipe conduit from an opening part of the pipe conduit having the cable laid therein and sprays high-pressure water to the part for laying the cable in the pipe conduit comprises: a channel part 100 in which one end is closed, spray holes 71 are disposed on a prescribed part of the one end side and water is supplied from the other end to the one end; and a support part 101 which supports the channel part 100 from the opposite side of the spray holes 71, wherein the high-pressure water is sprayed to the part for laying the cable from the spray holes 71 on the one end of the channel part 100. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water jetting apparatus that can be applied to a work for removing an underground cable installed in a buried pipeline. Specifically, the injection hole is provided in the predetermined part of the closed one end side, and a support part that supports the water conveyance part that is fed water from the other end from the opposite side of the injection hole is provided. By spraying high-pressure water on the installation site, the support part on the opposite side of the injection hole can keep the state pressed against the pipeline, and deposits deposited on the cable installation site can be efficiently collected. It can be crushed.

  Currently, in urban areas, in order to improve safety and aesthetics, there are increasing cases of installing underground cables (underground lines) instead of overhead lines.

  Underground cables are laid by pipe, burial, and dark laying methods. For example, in the pipe type, pipes made of pipe materials such as fume pipes, asbestos-cement pipes, steel pipes, etc. are laid at a buried depth of, for example, about 1.2 m, manholes are built at important points, and cables are connected inside the pipes. It is made to insert. An oil-filled cable, a CV cable, or the like is used as the cable.

  When replacing or removing a cable inserted in a pipeline due to aging, etc., cut off the junction of the pipeline located under the manhole and pull out the cable from the opening of the divided pipeline There is. However, calcium or the like contained in groundwater has permeated into the pipe line over many years, and is sometimes deposited between the cable and the pipe line to fix them.

  In that case, since the cable cannot be pulled out from the opening of the pipeline when the cable is removed, an investigation camera is inserted into the pipeline between manholes of about 100 m to 400 m to check the part where the deposits adhere. The road surface at the upper part of the adhering portion is cut to further cut the pipe, thereby removing the deposit. When excavating roads, an application period for construction permission is required, and a construction period and a large amount of work are required.

  In place of such excavation work, there is a method of cleaning the inside of the pipeline with high-pressure water before pulling out the cable. As an apparatus applicable to such cleaning, an in-pipe cleaning tool as shown in Patent Document 1 is disclosed. According to this in-pipe cleaning tool, it is provided with a cable guide groove having a substantially C-shaped cross section formed from the front end to the rear end of the in-pipe cleaning tool, and a cover body made of an arcuate plate that covers the cable guide groove. When cleaning the inside of the road, first, the cable is engaged with the cable guide groove, and the cover body is attached so as to cover the cable, and is inserted into the pipe. Next, high pressure water is ejected radially from the ejection holes provided on the outer periphery, and cleaning is started. If comprised in this way, since a cable can be protected from a high pressure water, it will become possible to clean the inside of the pipe | tube in which the cable was laid, without damaging a cable.

Japanese Patent Laying-Open No. 2005-21799 (pages 4 and 5, FIG. 1)

  However, according to the in-pipe cleaning tool according to Patent Document 1, since the outer periphery of the cover body that protects the cable is pushed in contact with the pipe body, it is assumed that the cover body is damaged by friction. Moreover, since high-pressure water is ejected radially, high-pressure water cannot be efficiently ejected toward the cable laying site in the pipe. Therefore, the solidified deposit between the pipe and the cable cannot be crushed, and the cleaning tool may not be able to propel the inside of the pipe.

  Furthermore, when inserting the cleaning tool into the tube, it is necessary to remove the cover body, engage the cable guide groove with the cable, and attach the cover body with screws. There is also the problem of hanging. Then, this invention was created in view of the above-mentioned problem, and it aims at providing the water-injection apparatus which enabled it to crush the deposit deposited on a cable laying site | part efficiently.

  A water injection device according to the present invention is a water injection device that is inserted into a pipe line from an opening of a pipe line in which a cable is laid, and injects high-pressure water into a cable laying site in the pipe line, One end is closed, and an injection hole is provided in a predetermined part on one end side, and a water guide part that feeds water from the other end to one end, and a support part that supports the water guide part from the opposite side of the injection hole, High-pressure water is jetted from the injection hole at one end of the water guide portion to the cable laying site.

  According to the water injection device according to the present invention, the water guide portion that has the injection hole in the closed predetermined portion on the one end side and that feeds water from the other end is supported by the support portion from the opposite side of the injection hole. The high pressure water is jetted to the cable laying site in the pipe. Accordingly, the support portion on the opposite side of the injection hole can be kept pressed against the pipe line by the water pressure of the injected water.

  According to the water injection device according to the present invention, the injection hole is provided in the predetermined portion on the one end side that is closed, and the support portion that supports the water guide portion that supplies water from the other end from the opposite side of the injection hole is provided. The high-pressure water is jetted from the injection hole at one end of the water guide portion to the cable laying site.

  With this configuration, the support portion on the opposite side of the injection hole can be held in a state where it is pressed into the pipeline by the water pressure of the injected water. Therefore, the water guide part supported by the support part can maintain the injection position and the injection angle of the injection hole. Thereby, since high-pressure water can be accurately jetted onto the cable laying site, the deposits deposited on the cable laying site can be efficiently crushed.

  Subsequently, a water injection device as an embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a configuration example of a deposit removing apparatus 1 as an embodiment of the present invention. The deposit removing device 1 shown in FIG. 1 constitutes an example of a water jetting device, and is inserted into a pipe line from one end of a pipe line in which the cable is laid, for example, when the underground cable is removed. is there.

  The deposit removing apparatus 1 is configured to inject high-pressure water onto a cable laying site in a pipeline and remove deposits fixed between the pipeline and the cable. The deposit removing apparatus 1 includes a water guide unit 100 that guides high-pressure water into a pipe and a support unit 101 that supports the water guide unit 100.

  The water guide unit 100 includes a hose 70 and a head 72 for the hose. A water supply pump 73 (see FIG. 5) for high pressure water is connected to the water guide section 100. The water supply pump 73 constitutes an example of a pressurized water supply device, and is connected to, for example, a water supply tank mounted on the transport vehicle, and pressurizes the water in the water supply tank to a predetermined water pressure and supplies the water to the subsequent stage. A hose 70 is connected to the subsequent stage of the water supply pump 73.

  The hose 70 is closed at one end and connected to the water supply pump 73 at the other end, and feeds water from the other end to the one end. The hose 70 has a length of 100 m to 400 m, for example, and guides water fed from the other end into the pipe. A head 72 is connected to one end of the hose 70.

  The head 72 is composed of a metal hose head, for example, and closes one end of the hose 70. The head 72 in this example has an injection hole 71 on one side surface. The injection hole 71 is opened in a diagonally backward direction when the forward direction is the direction indicated by the arrow line A <b> 1, which is the propulsion direction of the deposit removing device 1, in the direction of water conveyance of the water conveyance unit 100. Here, the water guiding direction is a direction in which water flows in the hose 70.

  The water sent from the water supply pump 73 is introduced into the pipe line by the hose 70 and is jetted from the jet hole 71 of the head 72 into the pipe line. In this example, the water guide section 100 configured as described above is provided in a pair of left and right, and is supported by the support section 101 from the opposite side of the injection hole 71.

  In this example, the support part 101 grips the hose 70 from the upper side of the water guide part 100. The support portion 101 is lifted by the high-pressure water 5 sprayed from the spray hole 71 to the cable laying site and is held against the inner wall of the conduit (see FIG. 4). Moreover, the support part 101 is propelled in the propulsion direction shown by arrow line A1 by injecting the high-pressure water 5 diagonally backward. That is, the high-pressure water 5 sequentially crushes the deposits fixed to the cable laying site, maintains the state of the support portion 101, and further propels the deposit removing device 1 in the pipeline (see FIG. 5).

  The support portion 101 includes a frame 10, four piping bands 50, and a bracket 60. The frame 10 includes a fan-shaped propulsion tool 11 that is perpendicular to the propulsion direction, and a connecting portion 17 and wing portions 18 and 19 that are parallel to the propulsion direction. The propulsion tool 11 includes an arc-shaped support member 12, rod-shaped support members 13 and 14, two bracket connecting portions 15, and five wheel portions 16. The propulsion tool 11 is provided in a pair of front and rear in this example.

  The arc-shaped support member 12 is formed of a thin rod body having a circular or rectangular cross section made of a relatively light metallic material such as austenitic stainless steel (SUS304) or aluminum, and the inner wall surface of the pipe. It is curved so as to follow the arc shape. The support member 12 in this example is configured in an arc shape slightly shorter than a semicircle (see FIG. 4). Both ends of the support member 12 are connected to a rod-like support member 13, the curved shape is fixed, and the strength in the lateral direction (left-right direction) is reinforced. The support member 13 is cut out from the same rod as the support member 12. A support member 14 cut out from a similar rod body is connected to both ends at substantially the center of the support member 12 and the support member 13 to reinforce the vertical (vertical) strength of the propulsion tool 11 (FIG. 2).

  Two bracket connecting portions 15 are provided in a pair of left and right sides on one side surface of the fan-shaped frame including the support member 12 and the support members 13 and 14. The bracket connecting portion 15 is formed in a plate shape, for example, of SUS304, and has two holes 15a for screwing (see FIG. 2). The piping band 50 is connected to the bracket connecting portion 15 via the bracket 60.

  The bracket connecting portion 15 is connected at a predetermined angle with a wide lower distance so that the hose 70 held by the piping band 50 is in a suitable arrangement position in the pipe line. The blanket connecting portion 15 is welded at one end to the support member 12 and is welded at the other end to the support member 13 to fix the state.

  In this example, five wheel portions 16 are connected to the arc-shaped outer peripheral portion of the support member 12. The wheel portion 16 constitutes an example of a sliding portion, and includes, for example, a metal axle portion 16a and a silicon or rubber wheel 16b. The wheel portion 16 is welded to the side surface of the support member 12 so that the wheel 16b protrudes in the outer peripheral direction. Moreover, the outer peripheral surface of the support member 12 may be sufficient as the position which welds the axle part 16a. The wheel 16b rotates in contact with the inner wall of the pipeline.

  The pair of front and rear propulsion tools 11 are connected to each other via a connecting portion 17. The connecting portion 17 is configured in a rectangular tube shape made of, for example, SUS304. At this time, the propulsion tool 11 is arranged such that the bracket connecting portion 15 is on the inner side. Moreover, one wheel part 16 is connected to the upper surface of the connection part 17 of this example, and functions as a 2nd sliding part. In the wheel portion 16, the axle portion 16 a is coupled to the upper surface of the coupling portion 17 so that the wheel 16 b contacts the upper surface of the inner wall of the pipe line.

  Further, before and after the propulsion tool 11, for example, wing portions 18 and 19 made of the same metal material as the connecting portion 17 are welded. The wing portion 18 has a hole portion 18a in the side surface and is disposed forward. The wing portion 19 has a hole portion 19a formed in a side surface, and is disposed rearward. A rope is connected to the holes 18a and 19a as necessary, and is operated when controlling movement in the pipe line. As described above, the frame 10 including the pair of propulsion tools 11, the connecting portion 17, and the wing portions 18 and 19 is configured.

  Brackets 60 are respectively connected to the bracket connecting portions 15 of the frame 10 configured as described above. The bracket 60 is configured by an L-shaped member made of, for example, SUS304. Two holes 60a are formed in each of the two surfaces bent in an L shape.

  One surface of the bracket 60 is screwed to the bracket connecting portion 15 by, for example, a hexagon bolt and a nut. The hexagon bolt is configured such that a shaft portion is inserted into the hole portion 60a and the hole portion 15a, and a nut is screwed from an end portion of the shaft portion to fix them. Moreover, a screw groove can be formed in the hole 15a and a nut can also be abbreviate | omitted. The bracket 60 functions as a connector that connects the frame 10 and the piping band 50.

  Further, in this example, the pair of propulsion tools 11 are arranged on the inner surfaces facing each other so as to have a pair of left and right bracket coupling portions 15, so that the bracket 60 is coupled to the inside of the pair of propulsion tools 11. . The bracket 60 is screwed with a pair of left and right with the bent corners on the outside. The piping band 50 is connected to the other bent surface of the bracket 60 from the left-right direction.

  The piping band 50 constitutes an example of a grip portion, is provided on the inner peripheral side (lower side) of the support member 12, and grips the hose 70 of the water guide portion 100. The piping band 50 includes a hose gripping part 51 and a connecting part 52. For the piping band 50, for example, a commercially available stainless steel piping support is used. The piping band 50 is configured such that a central portion is curved in a ring shape to form a grip portion 51, and both end portions of the grip portion 51 are extended to form a connection portion 52. The connecting portions 52 at both ends have two holes 52a that can communicate with each other.

  The pipe band 50 can be screwed to the bracket 60 by tightening a nut with a hexagonal bolt through the two holes 52a and 60a facing each other. Further, at this time, if the hose 70 is passed through the gripping part 51, the gripping part 51 is tightened by the hexagon bolts and nuts, and the piping band 50 can grip the hose 70 firmly. Thus, the support part 101 is comprised.

  In this example, the support unit 101 holds one hose 70 with the front and rear piping bands 50 and supports the hose 70 with a pair of left and right. The water guide part 100 is provided in a pair of left and right below the support part 101 and extends in parallel in the pipe line. The left and right heads 72 are supported so that the injection holes 71 are disposed slightly inside from directly below, and high pressure water is injected from both the left and right sides onto the deposits deposited around the contact portion between the pipe and the cable (see FIG. 4). ).

  Moreover, the water guide part 100 is extended in a pipe line by the support part 101 which propels the inside of a pipe line. The head 72 of the water guide unit 100 moves from one opening of the pipe to the other opening by the hydraulic power of the high-pressure water 5. Thereby, it becomes possible to inject high-pressure water from the injection holes 71 to the deposits throughout the pipeline. In this way, the deposit removing apparatus 1 is configured. Next, the manufacturing method of the support part 101 is demonstrated.

  By the way, some conduits for cable laying have an inner diameter of 150, 200, 250 mm or the like. In this example, a case where the deposit removal apparatus 1 for a pipe having an inner diameter of 150 mm is manufactured will be described. FIG. 2 is a perspective view showing an example of manufacturing the propulsion tool 11. The propulsion tool 11 shown in FIG. 2 is provided as a pair before and after the frame 10. In order to manufacture the propulsion tool 11, first, a cylindrical rod member having a diameter of, for example, about 5 mm made of SUS304 or aluminum is prepared. When the bar member is prepared, a bar body for the support member 12 having a predetermined length is cut out. When the rod is cut out, it is bent into a circular arc having a diameter of about 12 mm, for example, by heating and pressing. Further, the bar member used for forming the support member 12 may have a rectangular cross section.

  Next, the support member 13 is cut out from a similar rod member to a length that fits both ends in the left-right direction of the support member 12, and the both ends are connected to both ends of the support member 12 by, for example, welding. Further, the support member 14 that connects the support member 12 and the support member 13 in the vertical direction is cut out and welded. In this manner, a fan-shaped member can be formed from the rod member.

  Further, for example, five wheel portions 16 are connected to the side surface of the support member 12 fixed in an arc shape. The wheel portion 16 may be a general-purpose wheel having a silicon wheel 16b having a diameter of about 20 mm. When the wheel part 16 is connected, the wheel part 16b is radially arranged on a pipe having an inner diameter of 150 mm so as to contact each other at a right angle, and the axle part 16a is welded (see FIG. 4).

  Next, two bracket connecting portions 15 are manufactured. For example, the bracket connecting portion 15 is cut out from a metal plate member having a thickness of about 8 mm into a rectangle having a length of about 46 mm and a width of about 17 mm. Moreover, if a rectangular member is cut out, it will cut and corner if necessary. Two holes 15 a for screwing are formed in the bracket connecting portion 15.

  The bracket connecting portion 15 is connected to the fan-shaped member formed earlier. In that case, when the support member 13 is disposed on the lower side, the bracket connecting portion 15 is set to be a left and right object. At this time, it arrange | positions diagonally so that the distance of a lower side may spread. Since the positions of the hose 70 and the head 72 are determined by the connection position of the bracket connection portion 15, the welding position of the bracket connection portion 15 is determined in consideration of the length and size of the bracket 60 and the piping band 50 to be connected later. Like that. In this way, the propulsion tool 11 can be manufactured. If the propulsion tool 11 can be manufactured, another one of the same shape is manufactured and two propulsion tools 11 are prepared.

  If the two propulsion tools 11 are prepared, the support part 101 is manufactured based on it. FIG. 3 is a perspective view showing an example of manufacturing the support portion 101. In order to manufacture the support portion 101 shown in FIG. 3, first, the frame 10 is manufactured. First, the connecting portion 17 for connecting the pair of propulsion tools 11 is manufactured. For example, a plate member having a width of about 100 mm and a length of about 160 mm is cut out from a metal plate member having a thickness of about 2 mm, and a rectangular prism having a width of about 15 mm and a length of about 35 mm is bent. At this time, both ends of the bent plate member are welded and fixed to form a hollow square tube. In this example, the wheel portion 16 is also connected to the upper surface of the connecting portion 17. When the wheel portion 16 is connected, the axle portion 16a is welded with the wheel 16b facing upward.

  Next, both end portions in the length direction of the connecting portion 17 are welded to the support members 13 and 14 of the propulsion tool 11. At this time, the pair of propulsion tools 11 are arranged so that the bracket connecting portion 15 is on the inner side. Further, the wheel 16b on the upper surface of the connecting portion 17 and the wheel 16b on the upper surface of the propulsion tool 11 are in contact with the same plane (see FIG. 5).

  Next, the wing portions 18 and 19 are cut out from a plate member having a thickness of about 2 mm. Holes 18a and 19a for rope connection are opened in the wing parts 18 and 19. Moreover, the 5 mm diameter rod used at the time of manufacturing the propulsion unit 11 can be bent and welded to the edge of the plate member for reinforcement. The wing portions 18 and 19 are welded to the support member 14 of the propulsion tool 11, respectively. Thus, the frame 10 can be manufactured.

  Next, the bracket 60 is prepared. The bracket 60 is first cut out as a rectangular plate having a length of about 46 mm and a width of about 52 mm from a predetermined metal plate member having a thickness of about 3 mm, for example. Next, the cut plate is bent into an L shape so that the lateral width after bending becomes 20 mm and 32 mm, respectively. Two holes 60a are formed in each of the bent surfaces in the vertical direction.

  Furthermore, the piping band 50 connected to the bracket 60 is prepared. In this example, a general-purpose pipe support is used for the pipe band 50. As the piping band 50, for example, a stainless steel member having an inner diameter of the gripping portion 51 of 27 mm, a length of the connecting portion 52 of about 45 mm, and a total length of about 84 mm may be prepared. Four piping bands 50 are prepared.

  Thus, when the frame 10, the bracket 60, and the piping band 50 are prepared, the support part 101 is assembled. In order to assemble the support portion 101 from these members, 16 sets of hexagon bolts 80 and nuts 81 are prepared here. First, the bracket 60 is connected to the frame 10. The bracket 60 having the shorter lateral width, in this example, 20 mm, is applied to the bracket connecting portion 15. At this time, the bracket connecting portion 15 is arranged on the left and right so that the L-shaped bent portion of the bracket 60 is on the outside. The shaft portion of the hexagon bolt 80 is passed through the hole 60a and the hole 15a, respectively, and the nut 81 is screwed from the end. Here, the upper and lower hexagon bolts 80 and the nut 81 are used for fixing. Further, a screw groove may be formed in the hole 15a, and the hexagon bolt 80 may be screwed from the bracket 60 side, and the nut 81 may be omitted.

  Next, the piping band 50 is connected to the surface with the longer lateral width of the bracket 60. The shaft portion of the hexagon bolt 80 is passed through the two hole portions 52a and the hole portion 60a, and the nut 81 is screwed from the end portion. Again, the upper and lower hexagon bolts 80 and nuts 81 are used for fixing. At this time, if the hose 70 is inserted into the grip 51, the hose 70 is firmly gripped by tightening the hexagon bolt 80. Although not shown in FIG. 3 for simplification, the other three brackets 60 and the piping band 50 are connected to the frame 10 in the same procedure. In this way, the support portion 101 can be manufactured. Next, the deposit removing function of the deposit removing apparatus 1 will be described.

  FIG. 4 is a front view showing a function example (No. 1) of the deposit removing apparatus 1. The deposit removing apparatus 1 shown in FIG. 4 is a case where the deposit removing apparatus 1 is inserted into the pipe 2 and viewed from the propulsion direction. A cable 3 is laid inside the pipe 2. A deposit 4 formed by calcification of calcium or the like is deposited on the laying portion of the cable 3 in the pipe line 2, and both are fixed. The support portion 101 is lifted by the hydraulic power of the high-pressure water 5 ejected from the ejection hole 71, and maintains the state by contacting the wheel portion 16 with the upper inner wall. The water guide portion 100 injects the high-pressure water 5 from the left and right directions on the upper side of the cable 3 toward the periphery of the contact portion between the pipe line 2 and the cable 3.

  In this example, the injection hole 71 of the water guide section 100 is opened so as to be slightly inward from directly below so that the high-pressure water 5 is injected toward the deposit 4. The injection direction of the injection hole 71 can be easily adjusted by loosening the hexagon bolt 80 for connecting the grip portion 50 and changing the installation angle of the water guide portion 100. The deposit 4 injected with the high water pressure 5 is crushed, and the crushed fragments are scattered in the pipe 2.

  FIG. 5 is a side view showing a function example (No. 2) of the deposit removing apparatus 1. The deposit removing apparatus 1 shown in FIG. 5 is a case where the deposit removing apparatus 1 is inserted into the pipe 2 and is seen from the lateral direction through the pipe 2. One end portion 70 a of the hose 70 is closed by the head 72, supported by the support portion 101, and inserted into the conduit 2. The other end 70b of the hose 70 is connected to the water supply pump 73, and high-pressure water is fed in the direction of water introduction indicated by the arrow line A2.

  The water fed from the water supply pump 73 to the hose 70 is guided into the pipe line 2 through the hose 70 and is ejected from the ejection hole 71 provided in the head 72 in an obliquely rearward direction. The deposit removing device 1 crushes the deposit 4 in the entire pipe line with the high-pressure water 5 ejected from the ejection hole 71 and obtains a propulsive force from the water pressure of the high-pressure water 5 in the propulsion direction indicated by the arrow line A1. Promote automatically.

  FIG. 6 is a side view showing a function example (No. 3) of the deposit removing apparatus 1. The deposit removal apparatus 1 shown in FIG. 6 is a case where the waterproof camera 9 is mounted on the side surface. In this example, the waterproof camera 9 is fixed to the wing portion 18 with a rubber cord 9b. The rubber strap 9b is passed through the hole 18a, wound around the periphery of the waterproof camera 9 and bound at both ends, and fixes the waterproof camera 9 to the lower periphery of the wing 18. The image data communication cord 9a is fixed to the hose 70 with a rubber cord 9b.

  As described above, when the waterproof camera 9 is mounted on the deposit removing apparatus 1 and the inside of the pipeline is photographed, the direction of the photographed image can be substantially fixed, so that the place to be photographed can be stably photographed. The position where the waterproof camera 9 is connected is not limited to the wing part 18 and may be other parts such as the hose 70 and the connection part 17. In addition, as a connector for the waterproof camera 9, metal fittings, vinyl tape, or the like can be used. Moreover, if the waterproof camera 9 is installed so that the front is inclined downward, the lower deposit can be photographed efficiently.

  As described above, according to the deposit removing apparatus 1 according to the embodiment of the present invention, the water guide portion 100 that has the injection hole 71 in the predetermined portion on the one end side that is closed and is supplied with water from the other end, The support part 101 supported from the opposite side of the injection hole 71 is provided, and the high pressure water 5 is injected to the cable 3 installation site | part in the pipe line 2 from the injection hole 71 of the one end of the water guide part 100. FIG.

  With this configuration, the support portion 101 on the side opposite to the injection hole 71 can be kept pressed against the pipe line by the water pressure of the injected water. Therefore, the water guide part 100 supported by the support part 101 can maintain the injection position and the injection angle of the injection hole 71. Thereby, since high-pressure water can be accurately jetted to the laying part of the cable 3, the deposit 4 deposited on the cable laying part can be efficiently crushed.

  Therefore, when the cable 3 fixed to the pipe line 2 by the deposit is pulled out, it is not necessary to perform the excavation work on the road, so that the construction time and the construction cost can be greatly reduced. Furthermore, since the deposit removal operation can be started simply by inserting the water injection device 1 into the pipeline and starting the injection of high-pressure water, the preparation time for the operation can be shortened.

  In addition, as the hose 70, two hoses whose one ends are blocked by the head 72 can be prepared, and each of them can be connected to the water supply pump 73 and used as a pair on the left and right sides. It is also possible to prepare one Y-shaped hose with only a portion branched and connect the head 72 to one end of each to use as a pair of right and left water guiding portions 100.

  Further, in this example, one injection hole 71 is formed in the head 72, but the present invention is not limited to this, and a plurality of injection holes 71 may be formed. Further, the injection hole 71 can be opened on the lower side surface of the hose 70. In this case, for example, a plurality of holes along the length direction of the hose 70 may be opened over a predetermined distance supported by the support unit 100.

  Furthermore, a rope is wound around the hole 18a or the hole 19a, and the propulsion position and propulsion speed of the deposit removing device 1 can be controlled from both ends of the pipe line 2. In particular, when a rope is wound around the hole 19a located at the rear portion, the deposit removing device 1 can be stopped by pulling the rope at a portion where the deposit 4 is particularly attached, and high pressure water can be jetted intensively. .

  The present invention is extremely suitable when applied to a work for removing an underground cable laid in a buried pipeline.

It is a perspective view which shows the structural example of the deposit removal apparatus 1 as embodiment. 3 is a perspective view showing a manufacturing example of the propulsion tool 11. FIG. 5 is a perspective view showing an example of manufacturing the support portion 101. FIG. It is a front view which shows the function example (the 1) of the deposit removal apparatus. It is a side view which shows the function example (the 2) of the deposit removal apparatus. It is a side view which shows the function example (the 3) of the deposit removal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Deposit removal apparatus, 2 ... Pipe line, 3 ... Cable, 4 ... Deposit, 5 ... High pressure water, 9 ... Waterproof camera, 10 ... Frame, 11 ... propulsion tool, 12, 13, 14 ... support member, 15 ... bracket connecting part, 16 ... wheel part, 17 ... connecting part, 18, 19 ... wing part, 50 ... ..Hose gripping part, 60 ... bracket, 70 ... hose, 71 ... injection hole, 72 ... head, 73 ... water supply pump, 100 ... water guiding part, 101 ... support Part

Claims (8)

A water injection device that is inserted into a pipeline from an opening of a pipeline in which a cable is laid, and injects high-pressure water into a cable laying site in the pipeline,
One end is closed, a spray hole is provided in a predetermined part on one end side, and a water guide part is supplied with water from the other end to one end;
A support portion for supporting the water guide portion from the opposite side of the injection hole,
A water injection device characterized in that high-pressure water is injected from the injection hole at one end of the water guide portion into the cable laying site. The injection hole is
The water injection device according to claim 1, wherein when the water guide direction of the water guide portion is a front direction, the water jet device is opened toward an oblique rear direction. The injection hole is
The water injection device according to claim 1, wherein a hole is formed below the water guide portion. A pressure water supply device that pressurizes and supplies water to the water guide section,
The water conduit is
One end is closed and the other end is connected to the pressurized water supply device, and a hose is supplied with water from the other end.
A head for closing one end of the hose;
On the side of the hose or head,
The water injection device according to claim 1, wherein the injection hole is opened. The support part is
Having a sliding part on the opposite side of the direction of support of the water guide part,
The water injection device according to claim 1, wherein the sliding portion is pressed into the pipe. The support part is
A propulsion tool provided in a pair of front and rear,
A connecting portion for connecting the pair of propulsion tools,
The propulsion tool is
An arc-shaped support member along the inner wall surface of the pipe,
A holding part that is provided on an inner peripheral side of the support member and holds the water guide part;
The water injection device according to claim 1, comprising one or more wheel portions that are provided on an outer peripheral side of the support member and rotate on an inner wall of the pipe line. The water conduit is
Having first and second heads;
The water ejection device according to claim 4, wherein the first and second heads are provided in parallel in the pipe line. In the water injection device,
The water jet device according to claim 1, wherein a camera for photographing the inside of the pipeline is mounted.

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