JP2018063023A - Pipe end sealing tool and cooling method of pipe reclamation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe end sealing tool which can properly perform cooling of a pipe reclamation member by using a coolant and properly cool the pipe reclamation member even if an outdoor temperature is high, and to provide a cooling method of the pipe reclamation member.SOLUTION: A pipe end sealing tool 10 includes: a plug body 20 which is fitted in a pipe end of a pipe reclamation member; and a cylindrical guide part 32 which penetrates through the plug body in an axial direction. A seal ring 40 is provided on an inner peripheral surface of the guide part. A coolant supply hose which supplies a coolant for cooling the pipe reclamation member while maintaining airtightness at the pipe end of the pipe reclamation member may be slidably inserted into the guide part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pipe end sealing tool and a method for cooling a pipe rehabilitation member, and more particularly to a pipe end sealing tool for sealing a pipe end of a pipe rehabilitation member when cooling a pipe rehabilitation member inserted into an existing pipe, for example. . Moreover, it is related with the cooling method of the pipe renovation member using this pipe end sealing tool.

  Conventionally, as a method of rehabilitating an existing pipe, after inserting a pipe rehabilitation member made of synthetic resin bent and deformed into the existing pipe, the pipe rehabilitation member is expanded and restored to a cylindrical shape by applying heat and internal pressure. A method of lining the inner surface of an existing pipe is known. In this lining method, the pipe rehabilitation member is expanded in diameter and brought into close contact with the inner surface of the existing pipe, and then cooled to a predetermined temperature while maintaining this close contact state.

  Patent Document 1 discloses an example of a pipe end sealing device that seals the pipe end of a pipe rehabilitation member, and a method for cooling the pipe rehabilitation member. The pipe end sealing device of Patent Literature 1 includes a plug member inserted into the pipe end of the pipe renovation member, and a tightening member that tightens the pipe end from the outer surface side in a state where the plug member is inserted into the pipe end of the pipe renovation member. Is provided. The plug member is formed with a plurality of communication portions made of a short straight hollow pipe.

The pipe end sealing device of Patent Document 1 is basically used when the pipe rehabilitation member is restored by heating and pressurization, but is also used as it is when cooling the pipe rehabilitation member. . When the tube rehabilitation member is cooled using this tube end sealing device, one of the communicating portions of the plug member of the tube end sealing device is opened, and compressed air (cooling air) for cooling the tube rehabilitation member therefrom. A cooling nozzle is supplied. Then, by supplying compressed air from the cooling nozzle into the pipe rehabilitation member, the pipe rehabilitation member is cooled to a predetermined temperature.
JP 2012-207777 A

  In the technique of Patent Document 1, the pipe rehabilitation member is cooled to a predetermined temperature using compressed air. However, if the outside air temperature (ambient temperature) is high in summer or the like, a long cooling time is required, and cooling is performed. Sometimes it was not possible.

  Therefore, a main object of the present invention is to provide a novel tube end seal and a method for cooling a tube rehabilitation member.

  Another object of the present invention is to provide a pipe end sealing tool and a method for cooling a pipe rehabilitation member that can appropriately cool the pipe rehabilitation member even when the outside air temperature is high.

  1st invention is a pipe end sealing tool which seals the pipe end of a pipe renovation member when cooling the pipe renovation member inserted in the existing pipe, Comprising: The stopper fitted to the pipe end of a pipe renovation member Body, a cylindrical guide portion provided so as to penetrate the plug body in the axial direction, and a seal ring provided on the inner peripheral surface of the guide portion. This is a pipe end sealing tool in which a cooling water supply hose that supplies cooling water for cooling the pipe rehabilitation member can be slidably inserted while maintaining its properties.

  In 1st invention, a pipe end sealing tool seals the pipe end of a pipe renovation member, when cooling the pipe renovation member inserted in the existing pipe | tube and it was made diameter expansion restoration. The tube end sealer includes a plug fitted to the tube end of the tube rehabilitation member, and a cylindrical guide portion that penetrates the plug in the axial direction. A seal ring is provided on the inner peripheral surface of the guide part, and a cooling water supply hose that supplies cooling water for cooling the pipe rehabilitation member to the guide part while maintaining airtightness at the pipe end of the pipe rehabilitation member. Can be slidably inserted.

  According to the first invention, the cooling water supply hose can be slidably inserted into the guide portion while maintaining airtightness at the pipe end of the pipe regenerating member. Cooling can be performed appropriately. Since the cooling of the pipe rehabilitation member with cooling water has a higher cooling effect than the cooling of the pipe rehabilitation member with compressed air, the pipe rehabilitation member can be appropriately cooled even when the outside air temperature is high.

  A second invention is dependent on the first invention, and the guide portion has a curved pipe portion, and an end portion exposed to the outside of the pipe retreading member opens upward or obliquely upward.

  According to the second invention, since the end portion of the guide portion exposed to the outside of the pipe retreading member opens upward or obliquely upward, the cooling water supply hose can be easily inserted into the guide portion from the ground. it can.

  3rd invention is the cooling method of the pipe renovation member which cools the pipe renovation member inserted in the existing pipe using the pipe end sealing device which concerns on 1st or 2nd invention, Comprising: A pipe end seal is attached to the end, and while the tip nozzle of the cooling water supply hose inserted through the guide part of the pipe end seal is moved in the axial direction in the pipe rehabilitation member, the coolant is ejected from the tip nozzle. It is a cooling method of a pipe renovation member which cools a pipe renovation member.

  In the method of cooling a pipe rehabilitation member according to the third aspect of the invention, the pipe rehabilitation member inserted into an existing pipe and restored in diameter expansion is cooled with cooling water. In this cooling method, first, the pipe end sealing tool according to the first or second invention is attached to the pipe end of the pipe rehabilitation member to seal the pipe end of the pipe rehabilitation member. Then, the cooling water supply hose is inserted from the guide part of the pipe end seal into the pipe rehabilitation member, and the cooling water is supplied from the front end nozzle while moving the front end nozzle of the cooling water supply hose in the pipe rehabilitation member in the axial direction. Erupt. That is, the pipe rehabilitation member is cooled while changing the cooling water ejection position.

  According to the third aspect of the invention, since the pipe rehabilitation member is cooled by the cooling water while changing the cooling water jetting position, the entire pipe rehabilitation member can be cooled in a well-balanced manner in a short time.

  The fourth invention is dependent on the third invention, and the cooling water is mixed with an endothermic agent that generates an endothermic reaction when dissolved in water.

  In the fourth invention, the cooling water ejected from the tip nozzle is preliminarily mixed with an endothermic agent such as ammonium nitrate and urea that generates an endothermic reaction when dissolved in water. As a result, the temperature of the cooling water decreases, so that the pipe renewal member can be cooled more efficiently.

  The fifth invention is dependent on the third or fourth invention, and before cooling the pipe rehabilitation member with cooling water, the cooling air is renewed until the temperature of the pipe rehabilitation member reaches a predetermined first temperature. The pipe rehabilitation member is cooled by supplying it into the member, and cooling of the pipe rehabilitation member with cooling water is performed until the temperature of the pipe rehabilitation member reaches a predetermined second temperature lower than the first temperature from the first temperature. .

  In the fifth aspect of the invention, first, until the pipe rehabilitation member reaches a predetermined first temperature (for example, 50 ° C.), cooling air (compressed air) is supplied into the pipe rehabilitation member to gradually Cooling. And, in the temperature range that is difficult to cool with cooling air when the outside air temperature is high, that is, the temperature range from the first temperature to a predetermined second temperature (for example, 40 ° C.) lower than that, use cooling water. Cool the tube rehabilitation member.

  According to the fifth aspect of the present invention, it is possible to prevent an excessively rapid temperature change of the pipe rehabilitation member and to prevent distortion remaining in the pipe rehabilitation member while shortening the cooling time.

  According to the present invention, since the cooling water supply hose can be slidably inserted into the guide portion while maintaining the air tightness at the pipe end of the pipe renovating member, the cooling of the pipe regenerating member using the cooling water can be performed. It can be executed properly. Since the cooling of the pipe rehabilitation member with cooling water has a higher cooling effect than the cooling of the pipe rehabilitation member with compressed air, the pipe rehabilitation member can be appropriately cooled even when the outside air temperature is high.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a front view which shows the pipe end sealing device which is one Example of this invention. It is sectional drawing which shows the cross section of the pipe end sealing tool in the II-II line | wire of FIG. It is a front view which shows the clamp for fixing the pipe end sealing tool of FIG. 1 to the pipe end of a pipe renovation member. It is a side view which shows the fastener of FIG. It is an illustration figure which shows a mode that the pipe end sealing tool of FIG. 1 was fixed to the pipe end of a pipe renovation member. It is an illustration figure which shows the pipe renovation member wound around the drum for winding. It is an illustration figure which shows a mode when a pipe renovation member is inserted in an existing pipe. It is an illustration figure which shows a mode when diameter expansion restoration of the pipe renovation member inserted in the existing pipe is carried out. It is an illustration figure which shows a mode when the pipe renovation member made to expand-restore in the existing pipe is cooled. It is sectional drawing which shows the cooling water supply hose inserted by the guide part of a pipe end sealing tool. It is an illustration figure which expands and shows the mode of the seal ring vicinity of the pipe end sealing tool in FIG.

  Referring to FIGS. 1 and 9, a tube end sealing device 10 according to an embodiment of the present invention applies a heating and internal pressure after inserting a synthetic resin tube rehabilitation member 102 into an existing tube 100. Is used for the rehabilitation method in which the diameter is restored to a cylindrical shape by lining the inner surface of the existing pipe 100. As will be described in detail later, the tube end sealer 10 seals the tube end of the tube rehabilitation member 102 when cooling the tube rehabilitation member 102 inserted into the existing tube 100 and restored in diameter. 3 and is fixed to the pipe end of the pipe rehabilitation member 102 by a fastener 12 as shown in FIG. The tube end sealing tool 10 and the fastening tool 12 may be collectively referred to as a tube end sealing device.

  First, the tube rehabilitation member 102 will be briefly described before a specific description of the tube end sealing tool 10. The pipe rehabilitation member 102 is a long pipe formed of a synthetic resin such as hard vinyl chloride and polyethylene, and as shown in FIG. Wrapped in a shape) and conveyed. In this embodiment, the pipe rehabilitation member 102 is wound around the winding drum 104 in a reduced diameter shape having a substantially bowl-shaped cross section having a flat plate portion 102a and elliptic cylindrical portions 102b formed at both ends thereof. However, the pipe rehabilitation member 102 may be transported by being wound in a predetermined winding form without a drum.

  The tube rehabilitation member 102 can be manufactured by a known manufacturing method. When manufacturing the pipe rehabilitation member 102, first, a straight pipe is extruded with a predetermined diameter. Then, the straight pipe is heated to a predetermined temperature in the range from the softening point to the melting point (for example, about 100 ° C. in the case of the hard vinyl chloride pipe rehabilitation member 102), and flattened using a push plate, a roller, or the like. The diameter is reduced to a shape having a substantially bowl-shaped cross section. As a result, the reduced diameter pipe rehabilitation member 102 is restored to its original shape such as a cylindrical shape by heating and pressurizing again to a temperature not lower than the softening point and not higher than the melting point. The pipe rehabilitation member 102 is set so that the outer diameter when restored is approximately the same as the inner diameter of the existing pipe 100. The inner diameter of the existing pipe 100 to be rehabilitated is, for example, 100 to 700 mm.

  The pipe rehabilitation member 102 can be applied to rehabilitation of the existing pipe 100 of various uses and constituent materials. For example, it can be applied to rehabilitation of gas pipes, water and sewage pipes, cable protection pipes, etc., and the material of the rehabilitating pipe line may be any of reinforced concrete, cast iron, steel, synthetic resin, etc. .

  Next, the tube end sealing device 10 which is an embodiment of the present invention will be specifically described. As shown in FIGS. 1 and 2, the tube end sealing device 10 includes a plug 20 that is fitted to the tube end of the tube rehabilitation member 102. The plug body 20 includes a substantially cylindrical fitting portion 22 and a disk-like sealing portion 24 that seals one end of the fitting portion 22, and is formed of a metal such as iron or stainless steel. The outer diameter of the fitting portion 22 is set so as to be approximately equal to the inner diameter of the restored pipe rehabilitation member 102.

  An annular recess 26 extending over the entire length in the circumferential direction is formed on the outer peripheral surface of the fitting portion 22, and a strip-shaped sealing material 28 formed of heat-resistant rubber or the like is formed on the bottom surface of the recess 26. Is provided. Further, the other end portion of the fitting portion 22 is formed with a tapered portion 30 whose diameter is reduced toward the tip end side.

  The sealing portion 24 of the plug body 20 is provided with a cylindrical guide portion 32 so as to penetrate the sealing portion 24 in the axial direction. When the pipe end sealing tool 10 is attached to the pipe end of the pipe rehabilitation member 102, the guide part 32 opens upward on the end exposed to the outside of the pipe rehabilitation member 102.

  Specifically, the guide part 32 includes a curved pipe part 34 that curves upward through the sealing part 24, and a standing pipe part 36 that is connected to the upper end of the curved pipe part 34 and extends to the vicinity of the ground. And formed of metal such as iron and stainless steel. The curved pipe part 34 and the standing pipe part 36 are detachably coupled using, for example, a screw-type socket 38. If a plurality of types of vertical pipe portions 36 having different lengths are prepared, the length of the guide portion 32 can be adjusted by replacing the vertical pipe portion 36. Therefore, the existing pipes 100 having different embedment depths can be adjusted. It becomes possible to cope with.

  The inner diameter of the guide portion 32 is set slightly larger than the outer diameter of a cooling water supply hose 128 described later, and is, for example, 25 mm. In addition, a seal ring (rubber packing) 40 is provided on the inner peripheral surface of the upper end portion of the standing pipe portion 36. The seal ring 40 seals a gap between the inner peripheral surface of the standing pipe portion 36 and the outer peripheral surface of the cooling water supply hose 128.

  In other words, the cooling water supply hose 128 can be slidably inserted into the guide portion 32. At this time, the seal ring 40 is used to insert the inner peripheral surface of the standing pipe portion 36 and the outer periphery of the cooling water supply hose 128. The airtightness between the surfaces (and thus the airtightness of the tube end of the tube rehabilitation member 102 by the tube end sealing device 10) is maintained. As will be described later, a steam supply hose 124 extending from the steam generator 112 can be airtightly connected to the upper end portion of the guide portion 32.

  Moreover, the two communication parts 42 which penetrate the sealing part 24 in the axial direction are provided in the sealing part 24 of the plug body 20. Each communication portion 42 is formed in a short cylindrical shape by a metal such as iron and stainless steel. These communicating portions 42 are pressure gauge connection ports for connecting a pressure gauge (not shown) for measuring the pressure in the pipe rehabilitation member 102, and drainage for discharging water accumulated in the pipe rehabilitation member 102. Used as a mouth. However, the communication portion 42 is sealed with a cap or the like when not in use, and is appropriately opened only when necessary. Moreover, the number of the communication parts 42 can be changed suitably.

  Such a tube end seal 10 is fixed to the tube end of the tube rehabilitation member 102 using the fastener 12 as described above. As the fastener 12, for example, a fastener similar to the fastener (clamping member) described in JP 2012-207777 A may be used. Hereinafter, although the fastener 12 is demonstrated easily, refer to Unexamined-Japanese-Patent No. 2012-207777 for details.

  As shown in FIGS. 3 and 4, the fastener 12 includes a line member 50 and a pressing member 52. The wire member 50 is a linear member having a circular cross section formed of an elastic material such as spring steel. The wire member 50 has a ring portion 54 that is rounded in an annular shape, and both ends thereof extend upward. Further, screw threads 56 are formed at both ends of the wire member 50, and nut members 58 are screwed into the screw threads 56.

  The holding member 52 is formed of a metal such as iron or stainless steel, and is disposed on the ring portion 54 of the wire member 50. The holding member 52 includes a rectangular plate-shaped upper plate 60, a curved plate-shaped lower plate 62 along the ring portion 54 of the line member 50, and two side plates 64 that connect the upper plate 60 and the lower plate 62. In addition, through holes 60 a are formed on both sides of the upper plate 60. Both end portions of the wire member 50 are inserted into the respective through holes 60 a, and the above-described nut member 58 is attached to both end portions (threads 56) of the line member 50 above the upper plate 60. Further, a holding portion 66 that is two protrusions extending in the circumferential direction is formed on the lower surface of the lower plate 62. The holding portion 66 is used for positioning the wire member 50.

  As shown in FIG. 5, when attaching the pipe end sealing device 10 to the pipe end of the pipe retreading member 102, the pipe end of the pipe retreading member 102 is heated and softened to restore the cylindrical shape, and then the tapered portion 30 side is moved. First, the plug body 20 of the tube end sealer 10 is fitted into the tube end of the tube rehabilitation member 102. Further, the fastening tool 12 is attached to the outer surface side of the pipe rehabilitation member 102 at a position corresponding to the recessed portion 26 of the pipe end sealing tool 10. In this state, when the nut member 58 is screwed little by little with respect to the screw thread 56 of the fastener 12, the end portion of the wire member 50 is raised and the ring portion 54 is reduced in diameter. Then, the pipe rehabilitation member 102 is tightened by the ring portion 54 of the wire member 50, and the seal material 28 is pressed between the pipe rehabilitation member 102 and the plug body 20 of the pipe end seal 10. As a result, the space between the tube rehabilitation member 102 and the plug 20 of the tube end sealer 10 is hermetically and watertightly closed, and the tube end of the tube rehabilitation member 102 is sealed by the tube end sealer 10. Is done.

  Next, with reference to FIGS. 7 to 9, a method for rehabilitating the aged existing pipe 100 with the pipe rehabilitation member 102 and a method for cooling the pipe rehabilitation member 102 inserted into the existing pipe 100 will be described.

  Referring to FIG. 7, when rehabilitating the existing pipe 100, first, the remaining matter in the rehabilitation section of the existing pipe 100 is removed and washed. In addition, a heating chamber (thermal insulation casing) 110, a steam generator 112, and the like are installed on the side of the vertical shaft 106, and a winding drum 104 around which the pipe rehabilitation member 102 is wound is accommodated in the heating chamber 110. To do. At this time, the winding drum 104 is placed on the rotating table 114, and the rotating shaft standing on the rotating table 114 is inserted into the body of the winding drum 104. A winch 120 for winding the pulling wire 118 is disposed on the end shaft 116 side. In addition, about a heating apparatus provided with the heating chamber 110 etc., since a well-known technique is applicable, description is abbreviate | omitted.

  Next, the tube rehabilitation member 102 is heated to a predetermined temperature (for example, 80 ° C.) in the heating chamber 110 and softened. When heat-softening the tube rehabilitation member 102, first, the turntable 114 is operated to rotate the winding drum 104 and the tube rehabilitation member 102. Subsequently, the steam generator 112 is operated, steam is supplied into the heating chamber 110 to warm the entire heating chamber 110, and the tube rehabilitation member 102 is heated from the outside. Moreover, steam is supplied into the pipe renovation member 102 from the steam hose connected to the pipe end of the pipe renovation member 102, and the pipe renovation member 102 is heated from the inside. However, the method of softening the heat of the tube rehabilitation member 102 can be changed as appropriate. For example, hot air may be supplied into the heating chamber 110 together with the steam, or steam may be supplied to the inside or the outside of the tube rehabilitation member 102. Just supply.

  When the tube rehabilitation member 102 is sufficiently heated and softened, the tube rehabilitation member 102 is then pulled out of the winding drum 104 and inserted into the existing tube 100. At this time, the pulling wire 118 is inserted into the existing pipe 100 from the end of the vertical shaft 116, and the pulling wire 118 is connected to the tip of the pipe rehabilitation member 102. Thereafter, the pulling wire 118 is wound up by the winch 120, thereby pulling the pipe rehabilitation member 102 into the existing pipe 100.

  When the tip of the pipe rehabilitation member 102 reaches the shaft 116, subsequently, the diameter of the pipe rehabilitation member 102 is restored and the pipe rehabilitation member 102 is brought into close contact with the inner peripheral surface of the existing pipe 100 as shown in FIG.

  Specifically, first, both ends of the tube renovation member 102 are cut to seal the tube end of the tube renovation member 102, and the heating chamber 110 that is no longer needed is removed. In this embodiment, one end of the tube rehabilitation member 102 is sealed by the tube end sealer 10 according to the present invention, and the other end of the tube rehabilitation member 102 is connected to a conventional tube end sealer 122 (for example, Japanese Unexamined Patent Application Publication No. 2012). The sealing member described in JP-A No. 207777 is sealed. Next, a steam supply hose 124 extending from the steam generator 112 is inserted into and connected to the upper end portion of the guide portion 32 of the pipe end seal 10. Then, the steam generator 112 is operated to supply steam into the pipe rehabilitation member 102 via the steam supply hose 124 and the guide part 32 to heat the pipe rehabilitation member 102 and apply an internal pressure. Then, the diameter of the pipe rehabilitation member 102 is restored to a perfect circle shape or a substantially perfect circle shape, and the entire outer peripheral surface of the pipe rehabilitation member 102 is substantially in close contact with the entire inner peripheral surface of the existing pipe 100.

  When the diameter of the pipe rehabilitation member 102 is restored, subsequently, as shown in FIG. 9, the pipe rehabilitation member 102 is cooled to a predetermined temperature (for example, 40 ° C. or lower) while maintaining the internal pressure. In this embodiment, the pipe rehabilitation member 102 is cooled by ejecting high-pressure cooling water from the tip nozzle 134 of the cooling water supply hose 128 into the pipe rehabilitation member 102.

  Here, the cooling water supply hose 128 will be briefly described. As shown in FIG. 10, the cooling water supply hose 128 is a resin-made high-pressure hose, and the glass fiber rod 130 is inserted through the inside thereof. The outer diameter of the cooling water supply hose 128 is, for example, 16 mm. A water supply port 132 through which cooling water from the water supply device 126 flows is provided at the rear end of the cooling water supply hose 128, and a tip nozzle 134 is provided at the tip of the cooling water supply hose 128. The tip nozzle 134 is formed with a plurality of jet holes 134a extending obliquely rearward. That is, the front end nozzle 134 is a rear injection type nozzle, and the cooling water ejected from the front end nozzle 134 is ejected so as to expand in the radial direction obliquely rearward.

  Returning to the description of the cooling method shown in FIG. 9, when cooling the pipe rehabilitation member 102, first, the water supply device 126 is installed on the start shaft 106 side. And the cooling water supply hose 128 extended from the water supply apparatus 126 is penetrated by the guide part 32 of the pipe end sealing tool 10, and the front-end | tip nozzle 134 is arrange | positioned at the edge part of the pipe renovation member 102. FIG. At this time, since the guide portion 32 opens upward, the cooling water supply hose 128 can be easily inserted into the guide portion 32 from the ground. Further, as shown in FIG. 11, since the gap between the inner peripheral surface of the guide portion 32 and the outer peripheral surface of the cooling water supply hose 128 is sealed by the seal ring 40, the cooling water supply hose 128 is The tube rehabilitation member 102 can be slidably inserted into the guide portion 32 while maintaining airtightness at the tube end.

  Although not shown, in order to maintain the internal pressure of the pipe rehabilitation member 102, for example, a compressor or the like is connected to the pipe end seal 122 on the end shaft 116 side, and the pipe rehabilitation member 102 is compressed. Send air.

  Next, the water supply device 126 is operated to move the tip nozzle 134 of the cooling water supply hose 128 in the axial direction in the pipe rehabilitation member 102, and high-pressure cooling water is ejected from the tip nozzle 134 to cause the pipe rehabilitation member 102. Cool down. When the tip nozzle 134 reaches the end of the tube rehabilitation member 102, the tip nozzle 134 is moved in the reverse direction, and the tube rehabilitation member 102 is moved back and forth until the tube rehabilitation member 102 reaches a predetermined temperature. Cool down. Note that the cooling water ejected into the pipe rehabilitation member 102 is discharged to the outside through the communication portion 42 formed in the plug body 20 of the pipe end sealing device 10.

  Here, if the outlet of the cooling water supply hose is fixed to the pipe end of the pipe rehabilitation member 102 and the cooling water is ejected, only the upstream portion of the pipe rehabilitation member 102 is preferentially cooled and In the side portion, only the bottom where the cooling water flows is cooled. On the other hand, as in this embodiment, by moving the tip nozzle 134 of the cooling water supply hose 128 and cooling the pipe regenerating member 102 while changing the ejection position of the cooling water, the shaft of the pipe regenerating member 102 is changed. The entire direction and the entire circumferential direction can be cooled in a balanced manner in a short time. This can be achieved by using the tube end sealing device 10 having the guide portion 32 through which the cooling water supply hose 128 can be slidably inserted while maintaining airtightness at the tube end of the tube rehabilitation member 102. is there.

  When the pipe rehabilitation member 102 is cooled to a predetermined temperature, the pipe end seals 10, 122 are removed from the pipe rehabilitation member 102, and post-processing is performed as appropriate, thereby renewing the existing pipe 100 using the pipe rehabilitation member 102. Is completed.

  As described above, according to the pipe end sealing device 10 of this embodiment, the cooling water supply hose 128 is slidably inserted into the guide portion 32 while maintaining airtightness at the pipe end of the pipe rehabilitation member 102. Since it is possible, cooling of the pipe renovation member 102 using cooling water can be performed appropriately. Since the cooling of the pipe rehabilitation member 102 with cooling water has a higher cooling effect than the cooling of the pipe rehabilitation member 102 with compressed air, the pipe rehabilitation member 102 can be appropriately cooled even when the outside air temperature is high. The water cooling method for the pipe rehabilitation member 102 as described above is particularly effective when the outside air temperature (the temperature around the construction site) exceeds 40 ° C.

  Note that the cooling water supplied from the water supply device 126 may be mixed in advance with an endothermic agent such as ammonium nitrate or urea that generates an endothermic reaction when dissolved in water. As a result, the temperature of the cooling water decreases, so that the pipe rehabilitation member 102 can be cooled more efficiently.

  Further, in the above-described embodiment, only the cooling water is used when the pipe rehabilitation member 102 is cooled. However, when the pipe rehabilitation member 102 is cooled using cooling water, the pipe rehabilitation member 102 is cooled too rapidly, and there is a possibility that distortion remains in the pipe rehabilitation member 102. Therefore, as another embodiment of the method for cooling the pipe rehabilitation member, first, cooling air (compressed air) is supplied into the pipe rehabilitation member 102 until the pipe rehabilitation member 102 reaches a predetermined first temperature (for example, 50 ° C.). By supplying, the pipe rehabilitation member 102 is gradually cooled. When the outside air temperature is high, it is difficult to cool with cooling air (that is, it takes a long time for cooling or cannot be cooled), that is, from the first temperature to a predetermined second temperature (for example, 40 ° C.) lower than that. About the temperature range until it becomes, you may make it cool the pipe renovation member 102 using cooling water similarly to the above-mentioned. Accordingly, an excessively rapid temperature change of the pipe rehabilitation member 102 can be prevented while shortening the cooling time, and distortion remaining in the pipe rehabilitation member 102 can be prevented.

  Furthermore, in the above-described embodiment, the guide part 32 of the pipe end sealing device 10 has the curved pipe part 34 and the standing pipe part 36. However, the present invention is not limited to this, and the shape of the guide part 32 is appropriately changed. Is possible. For example, the guide part 32 does not necessarily need to extend to the vicinity of the ground, and does not necessarily have the standing pipe part 36. When the standing pipe portion 36 is not formed in the guide portion 32, a seal ring 40 may be provided on the inner peripheral surface of the upper end portion of the curved pipe portion 34 or the like. Moreover, the guide part 32 does not necessarily need to open the edge part of the side exposed to the exterior of the pipe renovation member 102 vertically upwards. For example, even if the end of the guide part 32 is opened obliquely upward, the cooling water supply hose 128 can be easily inserted into the guide part 32 from the ground.

  Further, in the above-described embodiment, the pipe rehabilitation member 102 has a reduced diameter shape with a substantially bowl-shaped cross section and is wound around the winding drum 104. It is not limited. For example, a reduced diameter shape folded by folding may be used, or a reduced diameter shape having a substantially heart shape in cross section in which a part in the circumferential direction is pushed in.

  It should be noted that the specific numerical values such as the dimensions and the specific shape described above are merely examples, and can be appropriately changed according to the needs of the product specifications and the like.

DESCRIPTION OF SYMBOLS 10 ... Pipe end sealing tool 12 ... Fastening tool 20 ... Plug body 32 ... Guide part 34 ... Curved pipe part 36 ... Standing pipe part 40 ... Seal ring 100 ... Existing pipe 102 ... Pipe renovation member 104 ... Winding drum 128 ... Cooling water supply hose 134 ... Tip nozzle

Claims (5)

A pipe end sealing tool for sealing a pipe end of the pipe renovation member when cooling the pipe renovation member inserted into an existing pipe,
A plug fitted to the pipe end of the pipe retreading member;
A cylindrical guide part provided so as to penetrate the plug body in the axial direction, and a seal ring provided on the inner peripheral surface of the guide part,
A cooling water supply hose that supplies cooling water for cooling the pipe retreading member can be slidably inserted in the guide portion while maintaining airtightness at the pipe end of the pipe retreading member. Sealing tool.   The pipe end sealing tool according to claim 1, wherein the guide part has a curved pipe part, and an end part exposed to the outside of the pipe retreading member opens upward or obliquely upward. A method for cooling a pipe rehabilitation member that cools a pipe rehabilitation member inserted into an existing pipe using the pipe end sealing device according to claim 1 or 2,
Attach the tube end seal to the tube end of the tube rehabilitation member,
While moving the tip nozzle of the cooling water supply hose inserted through the guide part of the pipe end sealer in the axial direction in the pipe renovation member, cooling water is ejected from the tip nozzle to cool the pipe renovation member. The cooling method of a pipe renovation member.   The method for cooling a pipe rehabilitation member according to claim 3, wherein the cooling water is mixed with an endothermic agent that generates an endothermic reaction when dissolved in water. Before cooling the pipe rehabilitation member with the cooling water, the pipe rehabilitation member is cooled by supplying cooling air into the pipe rehabilitation member until the temperature of the pipe rehabilitation member reaches a predetermined first temperature. And
The pipe rehabilitation according to claim 3 or 4, wherein the cooling of the pipe rehabilitation member with the cooling water is performed until the temperature of the pipe rehabilitation member reaches a predetermined second temperature lower than the first temperature from the first temperature. Method of cooling the member.

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