JP2018063020A - Heating device of pipe reclamation member - Google Patents

Abstract

SOLUTION: A heating device 10 of a pipe reclamation member includes a heating chamber 12 accommodating the pipe reclamation member 102 to heat and soften the pipe reclamation member before inserting the same into an existing pipe. Steam supply portions 46, 48 to supply steam into the heating chamber are disposed in the heating chamber. The heating chamber has an exhaust inlet 72 at a central upper portion in the heating chamber, and an exhaust collection pipe 70 having an exhaust outlet 74 is disposed outside of the heating chamber.EFFECT: As an exhausting amount and an exhausting direction from a heating chamber can be properly controlled by an exhaust collection pipe, exhausting from the heating chamber can be properly executed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heating apparatus for a pipe rehabilitation member, and more particularly to a heating apparatus for 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 device that heats and softens a pipe rehabilitation member before inserting it into an existing pipe. The heating device of Patent Document 1 includes a heating chamber in which a pipe rehabilitation member is accommodated, a steam supply unit (steam pipe) that supplies steam to the heating chamber, and the like.
JP 2012-193753 A

  In the technique of Patent Document 1, no particular mention is made of a method for discharging excess air (steam) in the heating chamber. However, if steam is randomly discharged out of the heating chamber, the surrounding area may be adversely affected. For example, when steam hits the surrounding plantation, the planting may die out, or it may be mistaken for a fire or other anomaly in the surrounding residents who sees steam rising from the heating chamber (steamed steam). . Further, if the exhaust amount to the outside of the heating chamber is not properly controlled, there is a possibility that the pipe renewal member cannot be heated appropriately.

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

  Another object of the present invention is to provide a heating device for a pipe rehabilitation member that can appropriately perform exhaust from a heating chamber.

  1st invention is a heating apparatus of the pipe renovation member which heat-softens the pipe renovation member which renovates an existing pipe before inserting in an existing pipe, Comprising: The heating chamber in which a pipe renovation member is accommodated, and the inside of a heating chamber A heating apparatus for a pipe rehabilitation member, comprising a steam supply section for supplying steam, and an exhaust collecting pipe having an exhaust inlet at the center upper portion inside the heating chamber and having an exhaust outlet outside the heating chamber.

  In 1st invention, the heating apparatus of a pipe renovation member is provided with the heating chamber in which a pipe renovation member is accommodated, and heat-softens a pipe renovation member before inserting in an existing pipe. The heating chamber is provided with a steam supply unit that supplies steam from the steam generator into the heating chamber. The heating chamber is provided with an exhaust collecting pipe. The exhaust collecting pipe has an exhaust inlet at the center upper portion inside the heating chamber and an exhaust outlet outside the heating chamber, and discharges excess air in the heating chamber collectively.

  According to the first invention, since the excess air in the heating chamber is discharged together using the exhaust collecting pipe, the exhaust amount and the exhaust direction from the heating chamber can be appropriately controlled. Further, by arranging the exhaust inlet of the exhaust collecting pipe at the center upper part in the heating chamber, the exhaust chamber can be exhausted in a balanced and uniform manner from the entire heating chamber. Therefore, the exhaust from the heating chamber can be appropriately performed, and the pipe rehabilitation member can be appropriately heated.

  The second invention is dependent on the first invention, and the exhaust collecting pipe has a flexible pipe part at least in part.

  In the second invention, the exhaust collecting pipe has at least a part of a flexible pipe formed by a heat-resistant hose having flexibility or the like.

  According to the second invention, since the exhaust collecting pipe has the flexible pipe portion, the opening direction and position of the exhaust outlet can be easily changed and adjusted. Therefore, it can respond appropriately to the surrounding situation of the construction site.

  A third invention is dependent on the first or second invention, and the exhaust collecting pipe has a laterally drawn pipe portion penetrating the side wall of the heating chamber.

  In the third aspect of the invention, the exhaust collecting pipe has a horizontal pulling pipe portion that extends through the side wall of the heating chamber and extends out of the heating chamber.

  According to the third invention, the exhaust collecting pipe is piped so as to penetrate the side wall of the heating chamber, so that the heating device can be reduced in height and the exhaust collecting pipe can be easily attached.

  A fourth invention is dependent on any one of the first to third inventions, and further includes a tank connected to the exhaust outlet of the exhaust collecting pipe, and a heater for heating the steam discharged into the tank.

  In the fourth invention, the steam discharged from the heating chamber through the exhaust collecting pipe into the tank is evaporated again by being heated by the heater to be transparent.

  According to the fourth aspect of the invention, the steam discharged from the heating chamber can be re-evaporated to be invisible, so that there is no possibility of misidentifying that there is an accident such as a fire in the surrounding residents.

  A fifth invention is dependent on any one of the first to fourth inventions, and further includes a covering member that has a heat insulating property, a windproof property, and a waterproof property and is provided so as to cover an outer surface of the heating chamber.

  In 5th invention, the coating | coated member provided so that the outer surface of a heating chamber might be covered is further provided. The covering member is formed of a material having heat insulating properties, windproof properties, and waterproof properties. By covering the outer surface of the heating chamber with such a covering member, it is possible to reduce the influence of the external environment such as the outside air temperature, wind and rain on the internal environment of the heating chamber.

  According to the fifth aspect, it is possible to make the heating conditions of the pipe rehabilitation member in the heating chamber uniform regardless of the external environment.

  According to the present invention, since the excess air in the heating chamber is discharged together using the exhaust collecting pipe, the exhaust amount and the exhaust direction from the heating chamber can be appropriately controlled. Further, by arranging the exhaust inlet of the exhaust collecting pipe at the center upper part in the heating chamber, the exhaust chamber can be exhausted in a balanced and uniform manner from the entire heating chamber. Therefore, the exhaust from the heating chamber can be appropriately performed, and the pipe rehabilitation member can be appropriately heated.

  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 of the pipe renovation member which is one Example of this invention. It is a schematic sectional drawing which shows the heating chamber with which the heating apparatus of FIG. 1 is provided. It is a top view which shows the bottom part of the heating chamber of FIG. It is an illustration figure which shows the pipe renovation member wound around the drum for winding. It is a top view which shows the heat flow adjustment board 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 the pipe renovation member heat-softened by the heating apparatus of FIG. It is an illustration figure which shows the heating apparatus of the pipe renovation member which is another Example of this invention. It is an illustration figure which shows the heating apparatus of the pipe renovation member which is further another Example of this invention.

  Referring to FIGS. 1 and 6, a heating apparatus 10 (hereinafter simply referred to as “heating apparatus 10”) for a pipe rehabilitation member according to an embodiment of the present invention repairs an aged existing pipe 100 from the inside. This is a device for heating and softening the pipe rehabilitation member 102 for insertion before inserting it into the existing pipe 100.

  First, the tube rehabilitation member 102 will be briefly described before the specific description of the heating device 10. The pipe rehabilitation member 102 is a long pipe formed of a synthetic resin such as hard vinyl chloride and polyethylene. As shown in FIG. 4, the pipe rehabilitation member 102 has a spiral shape with a predetermined reduced diameter with respect to a winding drum 40 described later. It is wound around (rolled) and conveyed. In this embodiment, the tube rehabilitation member 102 is wound around the winding drum 40 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 which is one Example of this invention is demonstrated concretely. As described above, the heating device 10 is a device for heating and softening the tube rehabilitation member 102, and includes the heating chamber 12 that houses the tube rehabilitation member 102.

  As shown in FIG. 1 to FIG. 3, 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 40. 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. Gear teeth are formed on the outer peripheral surface of the turntable 26, and a transmission gear 30 is connected to the gear teeth of the turntable 26. The driving force of the drive motor 32 is transmitted to the transmission gear 30 via the transmission chain 34 and the like, and the rotary table 26 can be rotated around its axis by receiving the rotational driving force from the transmission gear 30.

  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. Further, a pipe rising portion 36 is provided inside the rotary shaft portion 28. The pipe rising portion 36 is formed into a straight tube shape with a metal such as iron and SUS, and is erected on the base portion 14 so as not to rotate integrally with the rotating base portion 26 and the rotating shaft portion 28. A rising portion of a first steam pipe 46 described later is inserted into the pipe rising portion 36.

  A winding drum 40 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. 4, the winding drum 40 includes a body portion 42 and a flange 44 and is made of metal such as iron and SUS. The trunk | drum 42 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 44 are provided at both ends of the body part 42 and project from the outer peripheral surface of the body part 42 in a hook shape radially outward. The outer diameter of the trunk | drum 42 is 900 mm, for example, and the outer diameter of the flange 44 is 2400 mm, for example. The winding drum 40 and the tube rehabilitation member 102 rotate with the rotation of the rotary base unit 26 and the rotary shaft unit 28.

  Returning to FIGS. 1 to 3, the heating chamber 12 is provided with a steam supply unit. The steam supply unit supplies steam to the inside of the heating chamber 12 and includes a first steam pipe 46 and a second steam pipe 48 in this embodiment. However, it should be pointed out in advance that the specific configuration of the steam supply unit is not limited to the following configuration.

  A steam generator 52 provided outside the heating chamber 12 is connected to the upstream end portions of the first steam pipe 46 and the second steam pipe 48 via a connection hose 50. Pressurized steam is supplied from the steam generator 52 to the first steam pipe 46 and the second steam pipe 48.

  The first steam pipe 46 extends laterally in the space below the base portion 14, rises at the center of the heating chamber 12, and extends upward through the inside of the pipe rising portion 36. A rotating member 54 such as a known swivel is provided at the downstream end (upper end) of the first steam pipe 46, and the upstream end of the steam hose 56 is connected to the rotating member 54. And the downstream end of this steam hose 56 is connected to the end of the pipe renovation member 102 on the winding start side, and the steam from the steam generator 52 passes through the first steam pipe 46, the steam hose 56, etc. It is supplied to the inner surface side of the tube rehabilitation member 102. The steam supplied to the inner surface side of the tube rehabilitation member 102 is discharged into the heating chamber 12 from the end of the tube rehabilitation member 102 on the winding end side.

  Further, the second steam pipe 48 extends in the lateral direction below the space of the base portion 14, rises at the periphery of the turntable portion 26, and is arranged in a rectangular shape so as to surround the turntable portion 26. A plurality of upward discharge holes are formed at predetermined intervals in the tube wall of the second steam pipe 48, and the steam from the steam generator 52 passes through the inside of the heating chamber 12 from the discharge hole of the second steam pipe 48. It is supplied to (the outer surface side of the tube rehabilitation member 102).

  Further, the heating chamber 12 is provided with a hot air supply unit 58. The hot air supply unit 58 is for supplying hot air (dry air) heated to a predetermined temperature into the heating chamber 12, and is provided so as to extend in the lateral direction in the lower space of the base portion 14. A hot air generator 62 such as a jet heater is connected to the upstream end of the hot air supply unit 58 via a heat resistant hose 60 having flexibility. A shutter 64 that seals the internal passage of the hot air supply unit 58 so as to be openable and closable is provided at the upstream end of the hot air supply unit 58. On the other hand, the downstream end (hot air inlet 66) of the hot air supply unit 58 opens upward in a substantially trapezoidal shape at the peripheral edge of the base 14. That is, the hot air inlet 66 for sending hot air into the heating chamber 12 is provided below the housing position of the pipe rehabilitation member 102. Hot air from the hot air generator 62 is supplied from the hot air inlet 66 into the heating chamber 12 through the heat-resistant hose 60 and the hot air supply unit 58.

  Further, the heating chamber 12 is provided with a heat flow adjusting plate 80 so as to expand in a substantially horizontal direction below the pipe rehabilitation member 102 and above the hot air inlet 66. The heat flow adjusting plate 80 is a member for adjusting or controlling the flow of hot air sent from the hot air inlet 66 into the heating chamber 12 so that the hot air can be properly distributed throughout the heating chamber 12.

  Specifically, the heat flow adjusting plate 80 is formed in an annular plate shape from a metal such as iron and SUS, and extends in a substantially horizontal direction so as to extend from the outer surface of the rotating table 26 to the inner surface of the heating chamber 12. Provided. A plurality of legs 82 are provided on the lower surface of the heat flow adjusting plate 80, and the heat flow adjusting plate 80 is held at a predetermined height position between the pipe rehabilitation member 102 and the hot air inlet 66 by the legs 82. Is done.

  The heat flow adjusting plate 80 is formed with a plurality of circular through-holes 84 communicating with the upper surface and the lower surface in a predetermined arrangement manner. The through hole 84 is a portion serving as a hot air passage, and the flow of the hot air flowing upward can be adjusted by the arrangement of the through holes 84.

  In this embodiment, the opening ratio of the heat flow adjusting plate 80 by the through hole 84 is determined by the flow of hot air from obstacles (for example, the gear box 90 and the reinforcing rib 92 that house the transmission gear 30) that exist below the heat flow adjusting plate 80. The upstream side is set smaller than the downstream side in the direction. This is because if there is an obstacle, the hot air hits the obstacle and rises on the near side (upstream side), and it is difficult for the hot air to go around to the rear side (downstream side) of the obstacle. Further, the through hole 84 is not formed in the portion directly above the hot air inlet 66 of the heat flow adjusting plate 80. This is because the portion directly above the hot air inlet 66 is the position where hot air is most likely to rise. In other words, in this embodiment, the hot air easily flows into (is likely to rise) by setting the opening ratio of the heat flow adjusting plate 80 to be small or setting the opening ratio to zero. Appropriately distributed.

  Specifically, as can be seen from FIG. 5, the opening ratio of the heat flow adjusting plate 80 in the region A1 upstream of the gear box 90 in the heat flow direction is equal to the heat flow adjusting plate 80 in the region A2 of the gear box 90 downstream in the heat flow direction. Is set smaller than the aperture ratio. The opening ratio of the heat flow adjusting plate 80 in the region B1 upstream of the reinforcing rib 92 in the heat flow direction is set to be smaller than the opening ratio of the heat flow adjusting plate 80 in the region B2 downstream of the reinforcing rib 92 in the heat flow direction. Further, since the hot air easily flows around the peripheral portion of the heating chamber 12, the opening ratio of the heat flow adjusting plate 80 in the peripheral region C1 of the heating chamber 12 is larger than the opening ratio of the heat flow adjusting plate 80 in the inner region C2 on the center side. Is also set small. Further, as described above, the opening ratio of the heat flow adjusting plate 80 in the portion directly above the hot air inlet 66 is set to zero.

  By providing such a heat flow adjusting plate 80 in the heating chamber 12, the flow of hot air sent into the heating chamber 12 from the hot air inlet 66 can be adjusted or controlled. Can be spread. That is, since the temperature distribution in the heating chamber 12 can be adjusted to be uniform, the entire tube rehabilitation member 102 can be heated and softened as uniformly as possible.

  However, the arrangement mode such as the number, shape, and position of the through holes 84 formed in the heat flow adjusting plate 80 is not limited to the arrangement mode shown in FIG. 5 and can be appropriately changed according to the structure in the heating chamber 12. is there.

  Returning to FIGS. 1 and 2, the heating chamber 12 is provided with an exhaust collecting pipe 70. The exhaust collecting pipe 70 is for exhausting excess air (steam and hot air) in the heating chamber 12 to the outside. The exhaust collecting pipe 70 has an exhaust inlet 72 at the center upper portion in the heating chamber 12. An exhaust outlet 74 is provided outside. In this embodiment, the exhaust collecting pipe 70 includes a horizontal pulling pipe part 70a and a flexible pipe part 70b.

  The horizontal pipe portion 70a is a straight pipe formed of a metal such as iron and SUS, and extends in the horizontal direction from the center upper portion in the heating chamber 12, and the side wall of the heating chamber 12 (the awning sheet 22 in this embodiment). , Projecting to the outside of the heating chamber 12 through the body winding cover 24b and the second ceiling cover 24c). An opening at one end of the horizontal pulling pipe portion 70 a becomes an exhaust inlet 72. The inner diameter of the horizontal pulling tube portion 70a is, for example, 250 mm. On the other hand, the flexible tube portion 70b is a heat-resistant hose having flexibility, and one end portion thereof is connected to the other end portion of the horizontal pulling tube portion 70a, and the other end portion extends to the vicinity of the ground surface. The opening at the other end of the flexible tube portion 70 b becomes an exhaust outlet 74.

  By providing such an exhaust collecting pipe 70 in the heating chamber 12, it is possible to appropriately control the exhaust amount and the exhaust direction to the outside of the heating chamber 12. That is, the amount of exhaust from the heating chamber 12 can be controlled by the inner diameter and length of the exhaust collecting pipe 70, so that by appropriately setting the inner diameter and length of the exhaust collecting pipe 70, It is possible to appropriately control the amount of exhaust. Further, by disposing the exhaust inlet 72 at the center upper portion in the heating chamber 12, the exhaust chamber 72 can be exhausted in a well-balanced manner from the entire heating chamber 12. Further, by arranging the exhaust collecting pipe 70 so as to penetrate the side wall of the heating chamber 12, it is possible to reduce or prevent the height of the heating device 10 from increasing, and the exhaust collecting pipe 70 with respect to the heating chamber 12. The mounting work is also easy. Furthermore, if steam is randomly discharged from the heating chamber 12, the steam hits the surrounding planting, causing the planting to die, or an accident such as a fire in the surrounding residents who sees steam (water vaporized steam) rising from the heating chamber 12. There is a risk that it may be adversely affected, such as being misunderstood as having occurred. On the other hand, such a problem can be solved by exhausting steam in a predetermined direction using the exhaust collecting pipe 70 as in this embodiment. In particular, since the exhaust collecting pipe 70 includes the flexible pipe portion 70b, the opening direction and position of the exhaust outlet 74 can be easily changed and adjusted, so that it is possible to appropriately cope with the surrounding situation at the construction site.

  In this embodiment, a tank 76 and a heater 78 are connected to the exhaust outlet 74 of the exhaust collecting pipe 70. As the tank 76, for example, a drum can can be used. The heater 78 is, for example, a jet heater, and is provided so as to penetrate the side wall of the tank 76, and supplies hot air into the tank 76. The steam discharged from the heating chamber 12 through the exhaust collecting pipe 70 into the tank 76 is heated again by the heater 78 and evaporated again to be transparent. As described above, when steam rises from the apparatus, there is a risk that the surrounding residents may misunderstand that an accident such as a fire has occurred. However, the steam is discharged from the heating chamber 12 using the tank 76 and the heater 78. Such inconvenience can be solved by evaporating the steam again and making it invisible.

  Subsequently, with reference to FIGS. 1 and 6, a method of rehabilitating the existing pipe 100 that has aged using the heating device 10 and the pipe rehabilitation member 102 will be described.

  When rehabilitating the existing pipe 100, first, the remaining matter in the rehabilitation section of the existing pipe 100 is removed and washed. Further, the heating device 10 is installed on the start shaft 110 side, and the winding drum 40 around which the pipe rehabilitation member 102 is wound is accommodated in the heating chamber 12. A winch 116 for winding the pulling wire 114 is installed on the end of the vertical shaft 112 side.

  Next, the tube rehabilitation member 102 is heated and softened using the heating device 10. When heat-softening the tube rehabilitation member 102, first, the turntable 26 is operated to rotate the winding drum 40. Subsequently, the steam generator 52 is operated to supply steam to the inner surface side of the pipe rehabilitation member 102 via the first steam pipe 46 and the like, and the entire inside of the heating chamber 12 via the second steam pipe 48 and the like. To supply steam. Further, the hot air generator 62 is operated to supply hot air from the hot air inlet 66 into the heating chamber 12, and the steam supplied into the heating chamber 12 is further heated by the hot air. And the pipe renovation member 102 is heated for a predetermined time in a predetermined atmospheric temperature (for example, 80 to 100 ° C.). At this time, in this embodiment, since the exhaust collecting pipe 70 is provided in the heating chamber 12, the exhaust amount and the exhaust direction from the heating chamber 12 are appropriately controlled, and the pipe rehabilitation member 102 is appropriately adjusted without adversely affecting the surroundings. Can be heated.

  When the tube rehabilitation member 102 is sufficiently heated and softened, the tube rehabilitation member 102 is subsequently pulled out of the heating chamber 12 and inserted into the existing tube 100. At this time, the pulling wire 114 is inserted into the existing pipe 100 from the end of the shaft 112, and the pulling wire 114 is connected to the tip of the pipe rehabilitation member 102. 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 by using a steam generator 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 from the cooling nozzle or the like into the pipe rehabilitation member 102 to cool 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, since the excess air in the heating chamber 12 is discharged together using the exhaust collecting pipe 70, the exhaust amount and the exhaust direction to the outside of the heating chamber 12 can be appropriately controlled. . Further, by disposing the exhaust inlet 72 at the center upper portion in the heating chamber 12, the exhaust chamber 72 can be exhausted in a well-balanced manner from the entire heating chamber 12. Therefore, the exhaust from the heating chamber 12 can be appropriately performed, and the tube rehabilitation member 102 can be appropriately heated.

  Further, since the exhaust collecting pipe 70 includes the flexible pipe portion 70b, the opening direction and the position of the exhaust outlet 74 can be easily changed and adjusted, and the situation around the construction site can be appropriately handled. Further, since the exhaust collecting pipe 70 is provided so as to penetrate the side wall of the heating chamber 12, the heating apparatus 10 can be reduced in height, and the installation work of the heating apparatus 10 including the work of attaching the exhaust collecting pipe 70 to the heating apparatus 10 is also performed. It becomes easy.

  In the above-described embodiment, the exhaust collecting pipe 70 includes the horizontal pulling pipe part 70a and the flexible pipe part 70b. However, the present invention is not limited to this, and the specific configuration of the exhaust collecting pipe 70 is appropriately determined. It can be changed.

  For example, as shown in FIG. 8, a vertical pulling pipe part 70 c is provided instead of the horizontal pulling pipe part 70 a, and the exhaust pulling pipe is arranged so that the vertical pulling pipe part 70 c penetrates the center of the top wall of the heating chamber 12. 70 may be installed.

  Further, the exhaust collecting pipe 70 does not necessarily have the flexible pipe portion 70b. Further, the entire exhaust collecting pipe 70 may be configured by the flexible pipe portion 70b.

  As shown in FIG. 9, the exhaust collecting pipe 70 may be provided with a flow path adjusting unit 96 such as a damper or a valve that can adjust the cross-sectional area of the flow path. As a result, the amount of exhaust to the outside of the heating chamber 12 can be adjusted more accurately.

  In the above-described embodiment, the hot air supply unit 58 having one hot air inlet 66 that opens upward is provided. However, the present invention is not limited to this, and the specific configuration of the hot air supply unit 58 can be changed as appropriate. . For example, a plurality of hot air inlets 66 can be provided, or the hot air inlets 66 can be opened sideways. The hot air supply unit 58 is not necessarily provided in the heating chamber 12.

  Furthermore, 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 40 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 40 is rotated in the vertical direction).

  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 around the winding drum 40. There is no particular limitation. 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 ... Heating device 12 ... Heating chamber 24 ... Cover member 26 ... Rotating base part 28 ... Rotating shaft 40 ... Winding drum 46 ... 1st steam pipe 48 ... 2nd steam pipe 66 ... Hot-air inflow port 70 ... Exhaust gas collecting pipe 70a ... Horizontally drawn pipe part 70b ... Flexible pipe part 72 ... Exhaust inlet 74 ... Exhaust outlet 76 ... Tank 78 ... Heater 80 ... Heat flow adjusting plate 100 ... Existing pipe 102 ... Pipe rehabilitation member

Claims (5)

A heating device for a pipe rehabilitation member that heats and softens a pipe rehabilitation member for rehabilitating an existing pipe before inserting it into the existing pipe,
A heating chamber in which the pipe rehabilitation member is accommodated,
A steam supply part for supplying steam to the inside of the heating chamber; and a pipe rehabilitation member comprising an exhaust collecting pipe having an exhaust inlet at the center upper portion inside the heating chamber and having an exhaust outlet outside the heating chamber. Heating device.   The apparatus for heating a pipe rehabilitation member according to claim 1, wherein the exhaust collecting pipe has a flexible pipe part at least in part.   The apparatus for heating a pipe rehabilitation member according to claim 1 or 2, wherein the exhaust collecting pipe has a horizontal pulling pipe portion penetrating a side wall of the heating chamber. The apparatus for heating a pipe rehabilitation member according to any one of claims 1 to 3, further comprising: a tank connected to the exhaust outlet of the exhaust collecting pipe; and a heater for heating the steam discharged into the tank.   The apparatus for heating a pipe rehabilitation member according to any one of claims 1 to 4, further comprising a covering member that has heat insulating properties, windproof properties, and waterproof properties, and is provided so as to cover an outer surface of the heating chamber.

Images