JP2018063022A - Heating method of pipe reclamation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitution capable of accurately determining that a pipe reclamation member is heated and softened as a whole, while properly coping with construction in a narrow place.SOLUTION: In a heating method of a pipe reclamation member 102, a pipe reclamation member is heated and softened before inserted into an existing pipe 100. The pipe reclamation member is installed inside of a heating chamber 12 first. Then steam is supplied only to an inner face side of the pipe reclamation member without supplying a heat medium from an outer face side of the pipe reclamation member, to heat the pipe reclamation member. The steam supplied to the inner face side of the pipe reclamation member is exhausted to the outside of the heating chamber without exhausted into the heating chamber. An outer surface temperature of the pipe reclamation member is measured by using a temperature sensor, and the heating softening process is terminated when the outer surface temperature reaches a prescribed temperature.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for heating a pipe rehabilitation member, and more particularly, to a method for heating a pipe rehabilitation member that heats and softens a pipe rehabilitation member for rehabilitating an existing pipe before inserting it into the existing pipe.

  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. Since such a pipe rehabilitation member is difficult to insert into an existing pipe as it is, when inserted into the existing pipe, it is softened by heating in order to reduce insertion resistance.

Patent Document 1 discloses an example of a heating method in which a pipe rehabilitation member is heated and softened before being inserted into an existing pipe. In the technique of Patent Document 1, after the pipe rehabilitation member wound around the drum in a predetermined reduced diameter state is installed in the heating chamber, steam is supplied to the inner surface side of the pipe rehabilitation member, and the heating chamber (that is, By supplying both steam and hot air to the outer surface side, the tube rehabilitation member is heated and softened. The heating chamber is provided with a heating softening temperature measuring device including a solid body and a temperature measuring element provided therein. From the measurement result of the heating softening temperature measuring device, the softening state of the pipe rehabilitation member is accurately determined. I can do it.
JP 2012-193753 A

  In the technique of Patent Document 1, since the pipe rehabilitation member is heated from both the inner surface side and the outer surface side, the pipe rehabilitation member can be heated in a short time, but the apparatus becomes large. Further, in order to accurately determine the softened state of the tube rehabilitation member, a special device such as a heating softening temperature measuring device is required. However, the construction site where the existing pipes are rehabilitated may be a narrow area such as a narrow road, and a large-scale device cannot always be installed.

  Therefore, a main object of the present invention is to provide a novel method for heating a pipe rehabilitation member.

  Another object of the present invention is to provide a method for heating a pipe rehabilitation member that can be downsized so that it can be applied to construction in a narrow area and that can accurately determine that the entire pipe rehabilitation member has been softened by heating. It is to be.

  1st invention is a heating method of a pipe renovation member which heat-softens a pipe renovation member which rehabilitates an existing pipe in a heating chamber before inserting in an existing pipe, and (A) a pipe renovation member is put in the inside of a heating chamber. A step of installing, (B) heating the pipe rehabilitation member by supplying steam only to the inner surface side of the pipe rehabilitation member without supplying a heat medium from the outer surface side of the pipe rehabilitation member, and The supplied steam is discharged to the outside of the heating chamber without being discharged to the inside of the heating chamber, and (C) measuring the outer surface temperature of the tube rehabilitation member using a temperature sensor. Is the method.

  In the method for heating a pipe rehabilitation member according to the first invention, the pipe rehabilitation member for rehabilitating the existing pipe is softened by heating before being inserted into the existing pipe. First, in step (A), a pipe rehabilitation member is installed inside the heating chamber. Next, in step (B), the pipe rehabilitation member is heated by supplying steam only to the inner surface side of the pipe rehabilitation member without supplying a heat medium such as steam and hot air from the outer surface side of the pipe rehabilitation member. Moreover, the vapor | steam supplied to the inner surface side of the pipe renovation member is discharged | emitted outside the heating chamber, without discharging | emitting the inside of a heating chamber. In step (C), the temperature of the outer surface of the pipe retreading member is measured using a temperature sensor. When the measured temperature reaches a predetermined temperature, the heat softening process is terminated. In this way, when steam is supplied only to the inner surface side of the tube renovation member and heat medium is not supplied to the outer surface side of the heating chamber, the outer surface side of the tube rehabilitation member is exposed from the inner surface side of the tube rehabilitation member. It is heated only by heat transmitted through the thick interior. Therefore, when the outer surface temperature of the pipe retreading member is measured and the outer surface temperature reaches a predetermined temperature, it can be seen that the temperature has sufficiently increased to the inside of the thickness of the pipe retreading member.

  According to the first aspect of the invention, since the pipe rehabilitation member is heated and softened by supplying steam only to the inner surface side of the pipe rehabilitation member without supplying a heat medium from the outer surface side of the pipe rehabilitation member, the apparatus is downsized. it can. Therefore, it is possible to appropriately cope with construction in a narrow area. In addition, since the pipe rehabilitation member is heated only from the inner surface side, it is accurately determined that the entire pipe rehabilitation member has been heated and softened by confirming that the outer surface temperature of the pipe rehabilitation member has reached a predetermined temperature. it can.

  The second invention is dependent on the first invention, and in step (C), the outer surface temperature of the pipe retreading member is measured at the downstream end in the flow direction of the steam supplied to the inner surface side of the pipe retreading member. .

  In the second invention, the outer surface temperature of the pipe rehabilitation member is measured at the downstream end in the steam flow direction, which is the last part to be heated in the longitudinal direction of the pipe rehabilitation member (the part where the completion of heating is slow). . For this reason, if this part is heated enough, it turns out that the pipe renovation member is heated enough over the whole longitudinal direction.

  According to the 2nd invention, it can judge more correctly that the whole pipe renovation member was heat-softened.

  According to this invention, since the pipe rehabilitation member is heated and softened by supplying steam only to the inner surface side of the pipe rehabilitation member without supplying the heat medium from the outer surface side of the pipe rehabilitation member, the apparatus can be reduced in size. Therefore, it is possible to appropriately cope with construction in a narrow area. In addition, since the pipe rehabilitation member is heated only from the inner surface side, it is accurately determined that the entire pipe rehabilitation member has been heated and softened by confirming that the outer surface temperature of the pipe rehabilitation member has reached a predetermined temperature. it can.

  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 an illustration figure which shows the heating apparatus used for the heating method of the pipe renovation member which is one Example of this invention. It is an illustration figure which shows the drum for winding of FIG. 1, and a pipe renovation member. It is an illustration figure which shows the edge part of the winding end side of the pipe renovation member of FIG. It is an illustration figure which shows the double tube swivel with which the heating apparatus of FIG. 1 is provided. It is an illustration figure which shows a mode that the existing pipe is renovated using a pipe renovation member.

  Referring to FIGS. 1 and 5, according to the heating method for a pipe rehabilitation member according to an embodiment of the present invention, a pipe rehabilitation member 102 for repairing an old existing pipe 100 from the inside is provided in the existing pipe 100. This is a method of softening by heating before insertion. As will be described in detail later, in this heating method, the heating device 10 is used to supply steam only to the inner surface side of the tube rehabilitation member 102 without supplying a heat medium from the outer surface side of the tube rehabilitation member 102. The tube rehabilitation member 102 is softened by heating.

  First, before concrete description of the heating method according to the present invention, the pipe rehabilitation member 102 will be briefly described. The tube rehabilitation member 102 is a long tube 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 tube rehabilitation member 102 is wound around the winding drum 30 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. .

  Then, the heating apparatus 10 used for this heating method is demonstrated. The heating device 10 is a device for heating and softening the tube rehabilitation member 102, and includes a heating chamber 12 that houses the tube rehabilitation member 102.

  As shown in FIG. 1, the heating chamber 12 includes a base portion 14 and a tent portion 16 provided on the base portion 14, and is formed in a hollow, substantially cylindrical shape as a whole. The diameter of the heating chamber 12 is, for example, 2550 mm, and the length in the vertical direction (that is, the height of the back) is, for example, 1700 mm.

  The base 14 is a part constituting the bottom wall of the heating chamber 12 and is formed in a disc shape by a metal such as iron and SUS (stainless steel). A base frame 18 having a rectangular frame shape is provided below the base portion 14, and the base portion 14 is held by the base frame 18 in a state having a predetermined space below.

  The tent part 16 is a part constituting the top wall and the side wall of the heating chamber 12 and is formed in a cylindrical shape with a top. In this embodiment, the tent portion 16 includes a frame 20 that forms the framework and a awning sheet 22 that covers the frame 20. The frame 20 is formed, for example, by combining hollow pipes made of metal such as iron and SUS vertically and horizontally. The awning sheet 22 is formed of an elastic material such as heat-resistant rubber, and covers the ceiling and side portions of the frame 20 in an airtight manner.

  In this embodiment, the covering member 24 is provided so as to cover the outer surface of the heating chamber 12 (the upper surface and the outer surface of the awning sheet 22). The covering member 24 is formed of a material having heat insulating properties, windproof properties, and waterproof properties. For example, as the covering member 24, a commercially available heat shield sheet formed by sandwiching both surfaces of a base material such as a resin sheet with a metal layer such as an aluminum foil can be used. In this embodiment, the covering member 24 includes a first ceiling cover 24a that covers the upper surface of the awning sheet 22, a body winding cover 24b that covers the outer surface of the awning sheet 22, and upper portions of the first ceiling cover 24a and the body winding cover 24b. And a second ceiling cover 24c covering from the above.

  By covering the entire outer surface of the heating chamber 12 with such a covering member 24, the influence of the external environment (disturbance factors) such as the outside air temperature, wind, and rain on the internal environment of the heating chamber 12 can be reduced. Therefore, the heating condition of the tube rehabilitation member 102 in the heating chamber 12 can be made uniform or stabilized regardless of the external environment. Note that the term “having windproof property” as used herein means that it has the performance of not allowing wind to pass, and at least satisfies the standard of windproof property of JIS A6111: 2004 (passing time of 10 seconds or more according to JIS P8117 Gurley test machine method). Say that it is a thing.

  In such a heating chamber 12, a rotating table portion 26 and a rotating shaft portion 28 are provided as a rotating mechanism for rotating the winding drum 30 (pipe rehabilitation member 102). The turntable 26 is formed in an annular plate shape from a metal such as iron and SUS, and is installed on the upper surface of the base 14. Although not shown in the drawing, the rotating table 26 is transmitted with a driving force from the drive motor via a transmission chain, a transmission gear, and the like, so that the rotating table 26 can rotate around its axis. The rotating shaft portion 28 is formed in a straight tube shape with a metal such as iron and SUS, and is erected at the center of the rotating table portion 26. The rotating shaft portion 28 rotates together with the turntable portion 26.

  A winding drum 30 is installed on the turntable portion 26 so as to surround the outer peripheral surface of the rotation shaft portion 28. As shown in FIG. 2, the winding drum 30 includes a body portion 32 and a flange 34, and is formed of metal such as iron and SUS. The trunk | drum 32 has a double cylinder structure provided with an inner cylinder and an outer cylinder, and the pipe renovation member 102 is wound around the outer peripheral surface in a spiral shape. The flanges 34 are provided at both ends of the body portion 32 and project from the outer peripheral surface of the body portion 32 in a hook shape radially outward. The outer diameter of the trunk | drum 32 is 900 mm, for example, and the outer diameter of the flange 34 is 2400 mm, for example. The winding drum 30 and the pipe retreading member 102 rotate with the rotation of the rotary table unit 26 and the rotary shaft unit 28.

  Returning to FIG. 1, the steam supplied from the steam generator 40 to the heating chamber 12 is supplied to the inner surface side (inside) of the pipe renovation member 102 and the pipe renovation member 102. A steam discharge path 44, which is a path for discharging the steam to the outside of the heating chamber 12 without discharging the steam into the heating chamber 12, is provided.

  Specifically, a double pipe having an outer pipe 46 and an inner pipe 48 is provided inside the rotary shaft portion 28. The double pipes (the outer pipe 46 and the inner pipe 48) rotate with the rotation of the turntable unit 26 and the rotary shaft unit 28.

  A first hose connection 50 is provided at the upper end of the outer tube 46, and the upstream end of the air supply hose 52 is connected to the first hose connection 50. The downstream end of the air supply hose 52 is connected to a connection port of a sealing member (not shown) attached to the pipe end on the winding start side of the pipe rehabilitation member 102 so as to communicate with the inside of the pipe rehabilitation member 102. Connected.

  A second hose connection portion 54 is provided at the upper end portion of the inner pipe 48, and a downstream end portion of the exhaust hose 56 is connected to the second hose connection portion 54. As shown in FIG. 3, a sealing member 58 is attached to the end of the tube of the tube rehabilitation member 102, and the upstream end of the exhaust hose 56 communicates with the inside of the tube rehabilitation member 102. The connection port 58a formed in the sealing member 58 is connected. Further, the sealing member 58 is formed with a drain port 58b. Water (drain) generated by the condensation of steam in the pipe rehabilitation member 102 is discharged to the outside of the pipe rehabilitation member 102 from the drain port 58b.

  On the other hand, a double pipe swivel 60 is provided at the lower end of the double pipes 46 and 48. As shown in FIG. 4, the double tube swivel 60 includes a substantially cylindrical swivel case 62 having an air supply port 62a and an exhaust port 62b. A substantially cylindrical spindle 68 is rotatably provided inside the swivel case 62 via a bearing 64, a seal ring 66, and the like. The lower end portion of the outer tube 46 is connected to the upper end portion of the spindle 68 via a joint 70. Further, a substantially cylindrical cap 72 is provided inside the spindle 68, and the lower end portion of the inner tube 48 is connected to the cap 72. The cap 72 seals the space between the inner surface of the spindle 68 and the outer surface of the inner tube 48.

  Thus, in a state where the outer tube 46 and the inner tube 48 and the double tube swivel 60 are connected, the space between the inner surface of the outer tube 46 and the outer surface of the inner tube 48 communicates with the air supply port 62a. On the other hand, the internal space of the inner pipe 48 communicates with the exhaust port 62b. When the double pipes 46 and 48 are rotated in accordance with the rotation of the turntable portion 26 and the rotation shaft portion 28, the spindle 68 is moved while the swivel case 62 (the air supply port 62a and the exhaust port 62b) is kept in the non-rotating state. Rotates with double tubes 46,48.

  Returning to FIG. 1, an air supply pipe 74 connected to the steam generator 40 is connected to the air supply port 62 a of the double tube swivel 60. An exhaust pipe 76 extending to the outside of the heating chamber 12 is connected to the exhaust port 62b. The steam supplied from the steam generator 40 passes through the steam supply path 42 including the air supply pipe 74, the space between the inner surface of the outer tube 46 and the outer surface of the inner tube 48, and the air supply hose 52. It is supplied from the pipe end on the winding start side of the rehabilitation member 102 to the inner surface side of the pipe rehabilitation member 102. The steam supplied to the inner surface side of the pipe retreading member 102 flows to the pipe end on the winding end side of the pipe retreading member 102, and the steam exhaust path 44 including the exhaust hose 56, the inner space of the inner pipe 48, the exhaust pipe 76, and the like. It passes through the heating chamber 12 and passes through.

  Further, in this embodiment, the outer surface temperature of the tube rehabilitation member 102 is applied to the end portion on the winding end side of the tube rehabilitation member 102, that is, the downstream end portion in the flow direction of the steam supplied to the inner surface side of the tube rehabilitation member 102. A temperature sensor 78 for detection is provided. As the temperature sensor 78, a thermistor, a resistance temperature detector, a thermocouple, or the like can be used. Although not shown, the temperature detected by the temperature sensor 78 is displayed on a temperature display section of a monitor installed outside the heating chamber 12. In addition, a notification unit such as an alarm for notifying completion of heating when the temperature detected by the temperature sensor 78 reaches a predetermined temperature may be provided.

  Next, with reference to FIG. 1 and FIG. 5, a method for heat softening the pipe rehabilitation member 102 using the heating device 10 and a method for rehabilitating the existing pipe 100 with the heat softened pipe rehabilitation member 102 will be described.

  When the existing pipe 100 is rehabilitated, first, the remaining parts in the rehabilitation section of the existing pipe 100 are removed and washed, and the pipe rehabilitation member 102 is prepared for heating. That is, the heating device 10 is installed on the start shaft 110 side, and the pipe rehabilitation member 102 wound around the winding drum 30 is installed inside the heating chamber 12. At this time, the air supply hose 52 is used to connect the pipe end on the winding start side of the pipe rehabilitation member 102 and the first hose connection portion 50 of the outer pipe 46, and the air hose 56 is used to wind the pipe rehabilitation member 102. The pipe end on the end side is connected to the second hose connection portion 54 of the inner pipe 48. In addition, a winch 116 for winding the pulling wire 114 is installed on the end of the vertical shaft 112 side.

  When the preparation for heating the tube rehabilitation member 102 is completed, the tube rehabilitation member 102 is subsequently heated and softened using the heating device 10. When heat-softening the tube rehabilitation member 102, first, the entire heating device 10 is tilted by about 5 °, and then the turntable 26 is operated to rotate the winding drum 30 and the tube rehabilitation member 102. Next, the steam generator 40 is operated to supply steam to the inner surface side of the pipe renovation member 102 via the steam supply path 42. Further, the steam supplied to the inner surface side of the pipe rehabilitation member 102 is discharged to the outside of the heating chamber 12 through the steam discharge path 44. That is, without supplying a heat medium from the outer surface side of the pipe rehabilitation member 102, the pipe rehabilitation member 102 is heated by supplying steam only to the inner surface side of the pipe rehabilitation member 102 and supplied to the inner surface side of the pipe rehabilitation member 102. The vapor thus discharged is discharged outside the heating chamber 12 without being discharged inside the heating chamber 12.

  Then, by measuring the outer surface temperature at the end portion on the winding end side of the pipe retreading member 102 using the temperature sensor 78 and confirming that the outer surface temperature of the pipe retreading member 102 has reached a predetermined temperature (for example, 80 ° C.) The steam generator 40 is stopped, and the heat softening process of the pipe rehabilitation member 102 is completed.

  Here, if the pipe resurfacing member 102 is heated by supplying a heat medium such as steam and hot air from the outer surface side of the pipe remodeling member 102, even if the temperature of the outer surface of the pipe remodeling member 102 is measured by the temperature sensor 78, It is difficult to determine whether only the surface portion of the tube rehabilitation member 102 is heated or whether it is heated to the inside of the wall thickness. On the other hand, when the steam is supplied only to the inner surface side of the tube rehabilitation member 102 and the heat medium is not supplied to the outer surface side of the heating chamber 12 as in this embodiment, the outer surface of the tube rehabilitation member 102 is provided. The side is heated only by heat transmitted from the inner surface side of the pipe rehabilitation member 102 through the inside of the wall thickness. Therefore, the outer surface temperature of the pipe rehabilitation member 102 is measured, and if the outer surface temperature reaches a predetermined temperature, it can be seen that the temperature has sufficiently increased to the inside of the wall thickness of the pipe rehabilitation member 102. Moreover, since the steam is not filled in the heating chamber 12, it is easy to visually check the tube rehabilitation member 102, and it is easy to check the state of the tube rehabilitation member 102 by visual observation.

  Further, if the heating medium is heated only by supplying a heat medium only to the outer surface side of the tube rehabilitation member 102, the overlapping portion of the tube rehabilitation member 102 wound in a spiral shape is hardly heated. On the other hand, as in this embodiment, when steam is supplied to only the inner surface side of the tube rehabilitation member 102 to heat the tube rehabilitation member 102, such a problem does not occur, and the entire tube rehabilitation member 102 Heated substantially uniformly.

  Note that the discharge of steam to the outside of the heating chamber 12 without discharging the steam into the heating chamber 12 does not mean that the leakage of the steam into the heating chamber 12 is completely prevented. . As long as it does not affect the measurement of the outer surface temperature of the tube rehabilitation member 102, some leakage of steam supplied to the inner surface side of the tube rehabilitation member 102 into the heating chamber 12 is allowed.

  Further, the longitudinal position for measuring the outer surface temperature of the tube rehabilitation member 102 is not particularly limited, but as in this embodiment, the end of the tube rehabilitation member 102 on the winding end side, that is, the downstream end in the steam flow direction. By measuring the outer surface temperature at the portion, it can be determined that the temperature of the pipe rehabilitation member 102 is sufficiently increased over the entire length thereof. That is, the downstream side end portion of the pipe rehabilitation member 102 in the steam flow direction is a part that is heated last in the longitudinal direction of the pipe rehabilitation member 102 (a part where the completion of heating is slow). If it is heated, it can be seen that the tube rehabilitation member 102 is sufficiently heated over the entire length thereof. Therefore, it can be determined more accurately that the entire tube rehabilitation member 102 is heated and softened. Moreover, since the temperature sensor 78 is installed on the outer surface of the end portion on the winding end side of the pipe rehabilitation member 102, the temperature sensor 78 is easy to install.

  Returning to the explanation of the rehabilitation method for the existing pipe 100, when the heat softening process of the pipe rehabilitation member 102 is completed, the pipe rehabilitation member 102 is subsequently drawn out of the heating chamber 12 and inserted into the existing pipe 100. At this time, the temperature sensor 78 and the exhaust hose 56 are removed from the tube end portion on the winding end side of the tube rehabilitation member 102. Then, the pulling wire 114 is inserted into the existing pipe 100 from the end of the vertical shaft 112, and the pulling wire 114 is connected to the tip of the pipe rehabilitation member 102 (the pipe end on the winding end side). Thereafter, the pulling wire 114 is wound up by the winch 116, thereby pulling the pipe rehabilitation member 102 into the existing pipe 100.

  When the tip of the pipe rehabilitation member 102 reaches the shaft 112, both ends of the pipe rehabilitation member 102 are cut, and a diameter expanding bracket or the like is attached thereto, and the pipe end of the pipe rehabilitation member 102 is sealed. Then, steam is supplied into the pipe rehabilitation member 102 using the steam generator 40 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.

  Thereafter, in a state where the internal pressure is maintained, cooling air is supplied into the pipe rehabilitation member 102 from a cooling air supply port provided in the metal fitting for diameter expansion or the like, thereby cooling the pipe rehabilitation member 102. After cooling, the compressed air is discharged from the inside of the pipe rehabilitation member 102, and post-processing is appropriately performed, whereby the repair of the existing pipe 100 using the pipe rehabilitation member 102 is completed.

  As described above, according to this embodiment, the pipe rehabilitation member 102 is heated and softened by supplying steam only to the inner surface side of the pipe rehabilitation member 102 without supplying a heat medium from the outer surface side of the pipe rehabilitation member 102. Therefore, the heating device 10 can be reduced in size. Therefore, it is possible to appropriately cope with construction in a narrow area.

  Further, since the pipe rehabilitation member 102 is heated only from the inner surface side, the temperature of the pipe rehabilitation member 102 is sufficiently increased to the inside of the wall thickness by confirming that the outer surface temperature of the pipe rehabilitation member 102 has reached a predetermined temperature. You can see that Therefore, it can be accurately determined that the entire tube rehabilitation member 102 has been softened by heating.

  In the above-described embodiment, when the pipe rehabilitation member 102 is installed in the heating chamber 12, the axis for rotating the pipe rehabilitation member 102 extends in the vertical direction (that is, the winding drum 30 is rotated in the horizontal direction). However, you may install so that the axis | shaft which rotates the pipe renovation member 102 may extend in the horizontal direction (that is, the winding drum 30 is rotated in the vertical direction).

  In the above-described embodiment, the upstream end of the exhaust hose 56 is connected to the connection port 58 a of the sealing member 58, but the upstream end of the exhaust hose 56 is connected to the drain port 58 b of the sealing member 58. You may make it do. For example, the connection port 58a may be closed with a stopper or the like, or a sealing member 58 without the connection port 58a may be used. The upstream end of the exhaust hose 56 is connected to the drain port 58b, and the downstream end of the exhaust hose 56 is connected to the rotary shaft 28 from the lower end side of the rotary shaft 28. A drain outlet may be provided in the front. As a result, steam leakage into the heating chamber 12 can be minimized.

  Furthermore, in the above-described embodiment, the tube rehabilitation member 102 has a reduced diameter shape with a substantially bowl-shaped cross section, and is wound with the winding drum 30. 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.

  Furthermore, in the above-described embodiment, the tube rehabilitation member 102 is heated and softened while being rotated, but the tube rehabilitation member 102 is not necessarily rotated. When heating the tube rehabilitation member 102 without rotating it, the double tube swivel 60 is not necessarily provided. For example, the end of the tube retreading member 102 on the winding end side is directly taken out of the heating chamber 12, or the exhaust hose connected to the end of the tube retreading member 102 on the winding end side is taken out of the heating chamber 12. Steam can also be discharged outside the chamber 12.

  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 ... Heating device 12 ... Heating chamber 24 ... Covering member 26 ... Rotating base part 28 ... Rotating shaft 30 ... Winding drum 40 ... Steam generator 42 ... Steam supply path 44 ... Steam discharge path 60 ... Double pipe swivel 100 ... Existing pipe 102 ... Pipe rehabilitation member

Claims (2)

A method of heating a pipe renewal member that heats and softens a pipe rehabilitation member for rehabilitating an existing pipe in a heating chamber before being inserted into the existing pipe,
(A) installing the pipe retreading member inside the heating chamber;
(B) Without supplying a heat medium from the outer surface side of the pipe retreading member, heating the pipe retreading member by supplying steam only to the inner surface side of the pipe retreading member; Discharging the supplied steam to the outside of the heating chamber without discharging to the inside of the heating chamber; and (C) measuring the outer surface temperature of the tube renewal member using a temperature sensor. Method of heating the member.   The heating of the pipe rehabilitation member according to claim 1, wherein in step (C), the outer surface temperature of the pipe rehabilitation member is measured at the downstream end in the flow direction of the steam supplied to the inner surface side of the pipe rehabilitation member. Method.

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