JP6940099B2 - Heating device for pipe rehabilitation members - Google Patents

Description

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

Conventionally, as a method of rehabilitating an existing pipe that has deteriorated, a pipe rehabilitation member made of synthetic resin that has been bent, deformed and reduced in diameter is inserted into the existing pipe, and then the pipe rehabilitation member is expanded into a cylindrical shape by applying heating and internal pressure. A method of restoring the diameter and lining the inner surface of an existing pipe is known. Since it is difficult to insert such a pipe rehabilitation member into the existing pipe as it is, when it is inserted into the existing pipe, it is heated and softened in order to reduce the 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 tube rehabilitation member is housed. The heating chamber is provided with a steam supply unit for sending steam into the heating chamber and the inside of the pipe rehabilitation member, and a hot air supply unit for sending hot air into the heating chamber from below the pipe rehabilitation member.
Japanese Unexamined Patent Publication No. 2012-193753

Although the description is omitted in Patent Document 1, conventionally, in the heating device as described above, a drawer guide used for pulling out the heat-softened pipe rehabilitation member from the heating chamber is fixed adjacent to the heating chamber. It was provided as a target.

When the heating device is brought into the construction site, it is carried on the loading platform of the transport vehicle. However, in the heating device provided with the drawer guide fixedly, a large vehicle having a large in-vehicle space is required, and it is difficult to construct the heating device in a narrow place or the like. Further, in the past, the installation position of the drawer guide was limited to the rear side of the vehicle, so if the parking direction of the transport vehicle is restricted due to the situation at the construction site, the construction may be difficult. rice field.

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

Another object of the present invention is to provide a heating device for a pipe rehabilitation member, which can reduce the size of the device and improve the workability.

The first invention is 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, and is a heating chamber in which the pipe rehabilitation member is housed and a base portion of the heating chamber. with different circumferential positions plurality of guide mounting portion provided on, multiple guide mounting portions or the detachably mounting is tubular rehabilitation member of the drawer guide, and a footboard arranged on the side of the drawer guide,, The tread plate is a heating device for a pipe rehabilitation member that is detachably attached to the frame or foundation of a drawer guide.

In the first invention, the heating device for the pipe rehabilitation member includes a heating chamber in which the pipe rehabilitation member is housed, and the pipe rehabilitation member is heated and softened before being inserted into the existing pipe. A plurality of guide mounting portions are provided on the base portion (support member in the embodiment) of the heating chamber at different circumferential positions. Then, one of these plurality of guide mounting portions is selected, and the drawer guide of the pipe rehabilitation member is detachably attached. That is, the mounting position of the drawer guide can be changed. Further, a tread plate arranged on the side surface of the drawer guide is provided, and the tread plate is detachably attached to the frame or the base portion of the drawer guide.

According to the first invention, since the drawer guide is removable, the heating device can be miniaturized during transportation. Further, since the mounting position of the drawer guide can be changed, the drawer guide can be arranged according to the situation at the construction site, and the pipe rehabilitation member 102 can be easily pulled out. Therefore, the heating device can be applied to various construction sites including narrow areas, and the workability of rehabilitation work using pipe rehabilitation members is also improved.

Further, according to the first invention, the operator can easily pull out the pipe rehabilitation member by using the tread plate even when the heating device is still on the transport vehicle. In addition, by making the tread plate removable, transportation becomes easy.

The second invention is subordinate to the first invention, the heating chamber comprises a plurality of struts and a cover supported by the plurality of struts to form a storage space for the pipe rehabilitation member, and the plurality of guide mounting portions. , It is installed at a position avoiding multiple columns.

According to the second invention, a plurality of guide mounting portions (that is, mounting positions of drawer guides) are provided at positions avoiding the plurality of columns. Therefore, when the pipe rehabilitation member is pulled out from the heating chamber, the support column is prevented from becoming an obstacle.

The third invention is dependent on the second invention, and the circumferential position of the outlet of the pipe rehabilitation member provided on the cover can be changed according to the circumferential position to which the drawer guide is attached.

According to the third invention, since the circumferential position of the outlet of the pipe rehabilitation member can be changed according to the circumferential position to which the drawer guide is attached, the pipe rehabilitation member can be easily pulled out from the heating chamber. ..

According to the present invention, since the drawer guide is removable, the heating device can be miniaturized during transportation. Further, since the mounting position of the drawer guide can be changed, the drawer guide can be arranged according to the situation at the construction site, and the pipe rehabilitation member can be easily pulled out. Therefore, the heating device can be applied to various construction sites including narrow areas, and the workability of rehabilitation work using pipe rehabilitation members is also improved.

The above-mentioned object, other object, feature and advantage of the present invention will become more apparent from the detailed description of the examples described below with reference to the drawings.

It is a schematic diagram which shows the heating device of the tube rehabilitation member which is one Example of this invention. It is a schematic diagram which shows the pipe rehabilitation member wound around the winding drum. It is a top view which shows the base part and the drawer guide of the heating chamber provided with the heating device of FIG. It is a side view which shows the foundation part and a drawer guide. It is a front view which shows the foundation part and the drawer guide. It is a front view which shows the support member provided in the foundation part. It is a front view which shows the drawer guide. It is a side view which shows the drawer guide. (A) is a plan view showing a tread plate attached to a drawer guide, and (B) is a front view thereof. FIG. 5 is an illustrated diagram schematically showing an example of rehabilitating an existing pipe using a pipe rehabilitation member heated and softened by the heating device of FIG. 1. FIG. 5 is an illustrated diagram schematically showing a state in which the heating device at the time of construction in FIG. 10 is viewed from the drawer guide side. FIG. 5 is an illustrated diagram schematically showing another example of rehabilitating an existing pipe using a pipe rehabilitation member heated and softened by the heating device of FIG. 1.

With reference to FIGS. 1 and 10, a pipe rehabilitation member heating device 10 (hereinafter, simply referred to as “heating device 10”), which is 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 before inserting it into the existing pipe 100.

First, before the specific description of the heating device 10, 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 rigid vinyl chloride and polyethylene, and as shown in FIG. 2, has a spiral shape with respect to the winding drum 40 described later in a predetermined reduced diameter state. It is wound around (rolled) and transported. In this embodiment, the tube rehabilitation member 102 is wound around the winding drum 40 in a substantially gourd-shaped reduced diameter shape having a flat plate-shaped portion 102a and an elliptical tubular portion 102b formed at both ends thereof. However, the pipe rehabilitation member 102 may be drumlessly wound into a predetermined winding shape and transported.

The pipe rehabilitation member 102 can be manufactured by a known manufacturing method. When manufacturing the pipe rehabilitation member 102, first, a straight pipe is extruded to a predetermined diameter. Then, the straight pipe is heated to a predetermined temperature in the range of the softening point or more and the melting point or less (for example, about 100 ° C. in the case of the rigid vinyl chloride pipe rehabilitation member 102), and flattened by using a push plate, a roller, or the like. The diameter is reduced to a gourd-shaped cross section. As a result, the tube rehabilitation member 102 having a reduced diameter shape is restored to its original shape such as a cylindrical shape by heating and pressurizing again to a temperature equal to or higher than the softening point and lower than the melting point. The pipe rehabilitation member 102 is set so that the outer diameter when restored is substantially equal to the inner diameter of the existing pipe 100. The inner diameter of the existing pipe 100 to be rehabilitated is, for example, 100-700 mm.

The pipe rehabilitation member 102 can be applied to the 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 rehabilitated pipeline may be any of reinforced concrete, cast iron, steel, synthetic resin, and the like. ..

Subsequently, the heating device 10 which is an embodiment of the present invention will be specifically described. As described above, the heating device 10 is a device for heating and softening the pipe rehabilitation member 102, and includes a heating chamber 12 for accommodating the pipe rehabilitation member 102.

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

The foundation portion 14 is composed of a bottom plate 18 and a support member (foundation frame) 20. The bottom plate 18 is a portion constituting the bottom wall of the heating chamber 12, and is formed of iron and a metal such as SUS (stainless steel). The bottom plate 18 is formed in a disk shape, and its outer peripheral edge portion is formed in a groove shape that protrudes upward and opens outward. Further, the support member 20 is provided on the lower surface side of the bottom plate 18. The support member 20 is formed of a metal such as iron and SUS in a rectangular frame shape, and the support member 20 holds the bottom plate 18 in a state of having a predetermined space below.

Further, a plurality of support column attachment portions 22 to which the support columns 24a are detachably connected are provided on the peripheral edge portion of the bottom plate 18 (see FIG. 3). In this embodiment, twelve strut mounting portions 22 arranged at intervals of 30 degrees in the circumferential direction are formed on the bottom plate 18, and an arbitrary strut mounting portion 22 is selected from these twelve strut mounting portions 22. The support column 24a is mounted at a position avoiding the guide mounting portion 64, which will be described later. In other words, the guide mounting portion 64 is provided at a position avoiding the plurality of columns 24a. Therefore, when the pipe rehabilitation member 102 is pulled out from the heating chamber 12, the support column 24a is prevented from becoming an obstacle. Further, by making the support column 24a removable from the bottom plate 18, the support column 24a can be removed from the bottom plate 18 when the heating device 10 is transported, so that the heating device 10 can be easily transported.

The tent portion 16 is a portion constituting the top wall and the side wall of the heating chamber 12, and is formed in a climax cylindrical shape. The tent portion 16 includes a frame 24 that forms the framework thereof, and a cover (awning sheet) 26 that covers the frame 24.

The frame 24 is formed by, for example, vertically and horizontally combining hollow pipes made of metal such as iron and SUS. The frame 24 includes a plurality of columns 24a erected on the outer edge of the bottom plate 18, and a plurality of beam portions 24b connecting the upper ends of the columns 24a. Each of the columns 24a is detachably connected to the column mounting portion 22 provided on the bottom plate 18, and each of the beam portions 24b is detachably connected to the upper end portion of the column 24a.

Further, the cover 26 is a sheet-like member formed of an elastic material such as heat-resistant rubber, and is detachably attached to the frame 24. The cover 26 airtightly covers the ceiling and sides of the frame 24 and is supported by the frame 24 (posts 24a and beams 24b) to form a storage space for the pipe rehabilitation member 102 on the bottom plate 18.

An airtight opening / closing portion extending in the vertical direction is provided on the side wall portion of the cover 26, and by opening the opening / closing portion, an outlet 26a (see FIG. 11) of the pipe rehabilitation member 102 is formed. The circumferential position of the opening / closing portion (that is, the outlet 26a) can be changed by rotating the entire cover 26 when the cover 26 is attached to the frame 24. That is, since the position of the outlet 26a of the pipe rehabilitation member 102 provided on the cover 26 can be changed according to the position where the drawer guide 62 described later is attached, the pipe rehabilitation member 102 can be easily pulled out from the heating chamber 12. Can be done. However, it is also possible to change the circumferential position of the outlet 26a of the pipe rehabilitation member 102 by forming opening / closing portions at a plurality of circumferential positions of the cover 26 and appropriately selecting the opening / closing portions.

Further, although not shown, a covering member formed of a material having heat insulating properties, windproof properties, and waterproof properties may be provided so as to cover the upper surface and the outer surface of the cover 26. For example, as the covering member, a commercially available heat shield sheet formed by sandwiching both sides of a base material such as a resin sheet with a metal layer such as aluminum foil can be used. By covering the entire outer surface of the heating chamber 12 with such a covering member, it is possible to reduce the influence of the external environment (disturbance factor) such as the outside air temperature, wind and rain on the internal environment of the heating chamber 12.

In such a heating chamber 12, a base base 28 and a base shaft 30 are provided as a rotation mechanism for rotating the pipe rehabilitation member 102. The base base 28 is formed in a ring plate shape by a metal such as iron and SUS, and is installed on the upper surface of the bottom plate 18. The base base 28 is connected to a drive motor via a transmission gear, a transmission chain, or the like, and is made rotatable around its axis by receiving a rotational driving force from the drive motor.

Further, the base shaft 30 is formed in a straight tubular shape by metal such as iron and SUS, and is integrally erected at the central portion of the base base 28. The base shaft 30 rotates together with the base base 28. Further, a pipe rising portion is provided inside the base shaft 30. The pipe rising portion is made into a straight tube by metal such as iron and SUS, and is erected on the bottom plate 18 so as not to rotate integrally with the base base 28 and the base shaft 30. A rising portion of the first steam pipe 46, which will be described later, is inserted into the rising portion of the pipe.

Then, a winding drum 40 is installed on the base base 28 so as to surround the outer peripheral surface of the base shaft 30. As shown in FIG. 2, the winding drum 40 includes a body portion 42 and a flange 44, and is made of a metal such as iron and SUS. The body portion 42 has a double cylinder structure including an inner cylinder and an outer cylinder, and the pipe rehabilitation member 102 is spirally wound around the outer peripheral surface thereof. The flanges 44 are provided at both ends of the body portion 42, and project radially outward from the outer peripheral surface of the body portion 42 in a flange shape. The outer diameter of the body portion 42 is, for example, 900 mm, and the outer diameter of the flange 44 is, for example, 2300 mm. The winding drum 40 and the pipe rehabilitation member 102 rotate as the base base 28 and the base shaft 30 rotate.

Further, the heating chamber 12 is provided with a steam supply unit that supplies steam to the inside of the heating chamber 12. The specific configuration of the steam supply unit is not particularly limited, but in this embodiment, the steam supply unit includes a first steam pipe 46 and a second steam pipe 48. A steam generator 50 provided outside the heating chamber 12 is connected to the upstream end of the first steam pipe 46 and the second steam pipe 48 via a connecting hose. Then, steam heated and pressurized to a predetermined value is supplied from the steam generator 50 to the first steam pipe 46 and the second steam pipe 48.

The first steam pipe 46 extends laterally in the space below the bottom plate 18, rises at the central portion of the heating chamber 12, passes through the inside of the pipe rising portion, and extends upward. A rotating member 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 is connected to the rotating member. Then, the downstream end of the steam hose is connected to the end of the pipe rehabilitation member 102 on the winding start side, and the steam from the steam generator 50 is pipe rehabilitated via the first steam pipe 46, the steam hose, and the like. It is supplied to the inner surface side of the member 102.

Further, the second steam pipe 48 extends laterally in the space below the bottom plate 18 and rises at the peripheral portion of the base base 28, and is piped in a rectangular shape so as to surround the base base 28. A plurality of upward discharge holes are formed at predetermined intervals on the pipe wall of the second steam pipe 48, and steam from the steam generator 50 is sent from the discharge holes of the second steam pipe 48 to the inside of the heating chamber 12. It is supplied to (the outer surface side of the pipe rehabilitation member 102).

Further, the heating chamber 12 is provided with a hot air supply unit 52. The hot air supply unit 52 is for supplying hot air (dry air) heated to a predetermined temperature (for example, 200 ° C. or higher) into the heating chamber 12, and is provided so as to extend the space below the bottom plate 18 in the lateral direction. Be done. A hot air generator 54 such as a jet heater is connected to the upstream end of the hot air supply unit 52 via a flexible heat-resistant hose or the like. Further, a shutter 56 for opening and closing the internal passage of the hot air supply unit 52 is provided at the upstream end of the hot air supply unit 52. On the other hand, the downstream end (hot air inlet 58) of the hot air supply unit 52 opens upward at the peripheral edge of the bottom plate 18, and the hot air from the hot air generator 54 passes through the heat-resistant hose and the hot air supply unit 52. It is supplied from the hot air inlet 58 to the inside of the heating chamber 12.

Further, the heating chamber 12 is provided with a heat flow adjusting plate 60 below the pipe rehabilitation member 102 and above the hot air inflow port 58. The heat flow adjusting plate 60 is a member for adjusting or controlling the flow of hot air sent from the hot air inflow port 58 into the heating chamber 12 so that the hot air is appropriately distributed throughout the heating chamber 12. Specifically, the heat flow adjusting plate 60 is formed in an annular plate shape by a metal such as iron and SUS, and extends substantially horizontally so as to extend from the outer surface of the base base 28 to the inner surface of the heating chamber 12. Provided. A plurality of through holes (not shown) for communicating the upper surface and the lower surface of the heat flow adjusting plate 60 are formed in a predetermined arrangement mode. The through hole is a portion that serves as a passage for hot air, and the flow of hot air upward can be adjusted depending on the arrangement mode of the through hole. That is, by reducing the opening ratio of the heat flow adjusting plate 60 for the portion where the hot air easily flows (easily rises), the hot air can be appropriately distributed to the portion where the hot air does not easily flow. By using such a heat flow adjusting plate 60, the temperature in the heating chamber 12 can be made uniform or a desired temperature distribution can be obtained.

Further, as shown in FIGS. 3 to 5, the heating device 10 includes a drawer guide 62 for stably pulling out the pipe rehabilitation member 102 when the heat-softened pipe rehabilitation member 102 is pulled out from the heating chamber 12. .. Here, if the drawer guide is fixedly provided in the heating device 10, the heating device 10 becomes large and a large vehicle is required for transportation, and depending on the situation at the construction site or the like, rehabilitation using the pipe rehabilitation member 102 is required. Construction may be difficult.

Therefore, in this embodiment, the drawer guide 62 can be detachably attached to the base portion 14 (support member 20) of the heating chamber 12, and the attachment position can be changed to a plurality of circumferential positions. ing.

Specifically, with reference to FIGS. 3 to 5 and FIG. 6, the support member 20 of the foundation portion 14 is provided with a plurality of guide mounting portions 64 arranged at different circumferential positions. In this embodiment, the guide mounting portion 64 is provided in three directions of the support member 20 on both sides in the lateral direction and one side in the longitudinal direction, that is, in three directions on the left and right sides and the rear side when mounted on a vehicle. The guide mounting portion 64 is a pair of hollow square cylinders extending linearly in parallel at predetermined intervals, and is formed by using, for example, a metal square pipe such as iron and SUS. The insertion port 64a of the guide mounting portion 64 opens on the side surface of the support member 20. Further, on the side surface of the support member 20, a fastener 66 such as a latch lock having a slidable pin is provided on the side surface of each insertion port 64a. The fastener 66 is used for fixing (preventing) the drawer guide 62.

With reference to FIGS. 7 and 8 together with FIG. 3-FIG. 5, the drawer guide 62 is detachably attached to any of the plurality of guide attachment portions 64. That is, the drawer guide 62 is mounted by selecting the guide mounting portion 64 arranged in the direction in which the pipe rehabilitation member 102 is desired to be pulled out, depending on the situation at the construction site or the like.

The drawer guide 62 includes a frame 70 and a plurality of guide rollers 78, 80. The frame 70 is formed by combining, for example, a hollow square cylinder (square pipe) made of metal such as iron and SUS. The frame 70 includes a rectangular frame-shaped roller holding portion 72, and a pair of arm portions 74 fixed to both lower end portions of the roller holding portion 72 and extending linearly in parallel at predetermined intervals. A plurality of holes 74a for inserting the pins of the fastener 66 are formed on the side wall of the arm portion 74 so as to be lined up in the longitudinal direction of the arm portion 74. Further, on the lower surface of the arm portion 74, a tread plate mounting portion 76 for attaching the tread plate 84, which will be described later, is provided at a portion closer to the roller holding portion 72 than the hole 74a. The tread plate mounting portions 76 are formed in a short-angle cylindrical shape, and are arranged at four locations so as to open in the lateral direction of the arm portion 74. A hole 76a for inserting a lock pin 68 for fixing the tread plate 84 is formed on the side wall of the tread plate mounting portion 76.

A pair of the first guide roller 78 and the second guide roller 80 are attached to the roller holding portion 72. The pair of first guide rollers 78 are arranged in the diagonally vertical direction so as to be widely spaced upward, and define the position of the pipe rehabilitation member 102 in the width direction from both sides. Further, the second guide roller 80 is arranged so as to extend in the lateral direction, and supports the pipe rehabilitation member 102 from below.

Such a drawer guide 62 can be attached to the support member 20 simply by fitting the arm portion 74 into the guide mounting portion 64 and inserting the pin of the fastener 66 into the hole 74a. At this time, the distance between the tent portion 16 and the guide rollers 78, 80 is adjusted by adjusting the insertion length of the arm portion 74 with respect to the guide mounting portion 64 and changing the hole 74a into which the pin of the fastener 66 is inserted. Can be done. On the other hand, the drawer guide 62 can be removed from the support member 20 simply by pulling out the pin of the fastener 66 from the hole 74a and pulling out the arm portion 74 from the guide mounting portion 64.

3 With reference to FIG. 9, the tread plate 84 is a step arranged on the lateral side of the drawer guide 62, and is detachable from the tread plate mounting portion 76 provided on the frame 70 of the drawer guide 62. Can be attached to. In this embodiment, the tread plate 84 can be attached from either direction on both sides of the drawer guide 62. Specifically, the tread plate 84 includes a frame 86 and a tread portion 88. The frame 86 includes a rectangular frame portion 86a for holding the tread portion 88 and a pair of arm portions 86b, and is formed by combining, for example, a hollow square cylinder made of metal such as iron and SUS. The step portion 88 is formed in a rectangular plate shape using, for example, expanded metal, and is fixed to the upper surface of the rectangular frame portion 86a. Further, a hole 86c for inserting the lock pin 68 for fixing the tread plate 84 is formed on the side wall of the arm portion 86b.

Such a tread plate 84 is attached to the frame 70 of the drawer guide 62 simply by fitting the arm portion 86b into the tread plate mounting portion 76, aligning the positions of the holes 76a and 86c, and inserting the lock pin 68 and the like into the holes 76a and 86c. It is possible. On the other hand, the tread plate 84 can be removed from the frame 70 of the drawer guide 62 simply by pulling out the lock pin 68 from the holes 76a and 86c and pulling out the arm portion 86b from the tread plate mounting portion 76. By making the tread plate 84 removable in this way, the drawer guide 62, the tread plate 84, and the heating device 10 can be easily transported.

Subsequently, a method of rehabilitating the aged existing pipe 100 by using the heating device 10 and the pipe rehabilitation member 102 will be described with reference to FIGS. 1, 10 and 11.

When rehabilitating the existing pipe 100, first, the equipment and members necessary for construction including the heating device 10 are brought into the construction site. When the heating device 10 is brought into the construction site, the heating device 10 is placed on the loading platform of the transport vehicle 120 and transported with the drawer guide 62 removed. At this time, since the heating device 10 can be miniaturized by leaving the drawer guide 62 removed, a small transport vehicle 120 for transporting the heating device 10 can also be used.

Next, as shown in FIGS. 10 and 11, the heating device 10 is installed on the shaft 110 side of the starting point. At this time, the transport vehicle 120 is arranged (parked) according to the situation at the construction site, and the drawer guide 62 is attached in the direction in which the pipe rehabilitation member 102 is to be pulled out while the heating device 10 is mounted on the transport vehicle 120. .. 10 and 11 illustrate the case where the pipe rehabilitation member 102 is pulled out from the left side of the transport vehicle 120. However, as shown in FIG. 12, the drawer guide 62 can be arranged on the rear side of the transport vehicle 120, or the drawer guide 62 can be arranged on the right side of the transport vehicle 120, although not shown. A winch 116 for winding the tow wire 114 is installed on the shaft 112 side at the end point.

Subsequently, the tube rehabilitation member 102 is heated and softened using the heating device 10. When the pipe rehabilitation member 102 is heated and softened, first, the base base 28 is operated to rotate the winding drum 40. Subsequently, the steam generator 50 is operated to supply steam to the inner surface side of the pipe rehabilitation member 102 via the first steam pipe 46 or the like, and the entire inside of the heating chamber 12 is supplied via the second steam pipe 48 or the like. Supply steam to. Further, the hot air generator 54 is operated to supply hot air from the hot air inflow port 58 to the inside of the heating chamber 12, and the steam supplied into the heating chamber 12 is further heated by the hot air. Then, the pipe rehabilitation member 102 is heated for a predetermined time in a predetermined atmospheric temperature (for example, 80 to 110 ° C.).

When the pipe rehabilitation member 102 is sufficiently heated and softened, the opening / closing portion of the cover 26 is opened to form the outlet 26a of the pipe rehabilitation member 102 on the cover 26. Then, the pipe rehabilitation member 102 is pulled out from the outlet 26a, and the pipe rehabilitation member 102 is inserted into the existing pipe 100 via the drawer guide 62. At this time, by using the tread plate 84 attached to the frame 70 of the drawer guide 62, the operator can pull out the pipe rehabilitation member 102 even when the heating device 10 is still mounted on the transport vehicle 120. It can be done easily. Further, when inserting the pipe rehabilitation member 102 into the existing pipe 100, the tow wire 114 is inserted into the existing pipe 100 from the shaft 112 side at the end point, and the tow wire 114 is connected to the tip of the pipe rehabilitation member 102. .. After that, the pipe rehabilitation member 102 is pulled into the existing pipe 100 by winding the tow wire 114 with the winch 116.

When the tip of the pipe rehabilitation member 102 reaches the shaft 112, both ends of the pipe rehabilitation member 102 are cut, a diameter-expanding metal fitting 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 50 to heat the pipe rehabilitation member 102 and apply internal pressure. Then, the cross-sectional shape of the pipe rehabilitation member 102 is expanded and restored to a perfect circular shape or a substantially perfect circular shape, and the entire outer peripheral surface of the pipe rehabilitation member 102 is substantially brought into close contact with the entire inner peripheral surface of the existing pipe 100.

After that, while maintaining the internal pressure, cooling air is supplied into the pipe rehabilitation member 102 from a cooling nozzle or the like to cool the pipe rehabilitation member 102. After cooling, compressed air is discharged from the inside of the pipe rehabilitation member 102, and post-treatment is appropriately executed to complete the rehabilitation of the existing pipe 100 using the pipe rehabilitation member 102.

As described above, according to this embodiment, since the drawer guide 62 is detachably provided, the heating device 10 can be miniaturized during transportation. Further, since the mounting position of the drawer guide 62 can be changed, the drawer guide 62 can be arranged according to the situation at the construction site, and the pipe rehabilitation member 102 can be easily pulled out from the heating chamber 12. Therefore, the heating device 10 can be applied to various construction sites including a narrow area, and the workability of the rehabilitation work using the pipe rehabilitation member 102 is also improved.

In the above-described embodiment, the support member 20 is provided with the guide mounting portion 64, but the present invention is not limited to this, and the guide mounting portion 64 is provided, for example, on the vertical wall portion formed on the outer peripheral edge portion of the bottom plate 18. You can also. Further, the number of guide mounting portions 64 and the position in the circumferential direction can be changed as appropriate. For example, the guide mounting portions 64 may be provided in only two directions, one on the left and one on the right and the other on the rear side when mounted on a vehicle.

Further, in the above-described embodiment, the tread plate mounting portion 76 is provided on the frame 70 of the drawer guide 62, but the tread plate mounting portion 76 is not limited to this, and the tread plate mounting portion 76 is, for example, the base portion 14 (bottom plate 18 or support member 20). ) Can also be provided. That is, the tread plate 84 can also be attached to the base portion 14 of the heating chamber 12.

Further, in the above-described embodiment, the drawer guide 62 is composed of the frame 70 and the plurality of guide rollers 78, 80, but the drawer guide 62 may further include a cylindrical heat insulating hood (not shown). The heat insulating hood is attached to the roller holding portion 72, for example, and covers the periphery of the pipe rehabilitation member 102 drawn out from the heating chamber 12, thereby suppressing the temperature drop of the pipe rehabilitation member 102.

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). ), But the shaft for rotating the pipe rehabilitation member 102 may be installed so as to extend in the lateral direction (that is, the winding drum 40 is rotated in the vertical direction).

Further, in the above-described embodiment, the pipe rehabilitation member 102 has a reduced diameter shape having a substantially gourd cross section and is wound around the winding drum 40. Not limited. For example, it may have a reduced diameter shape that is folded by a folding process, or may have a reduced diameter shape that has a substantially heart-shaped cross section in which a part of the circumferential direction is pushed.

The specific numerical values such as the dimensions and the specific shapes mentioned above are merely examples, and can be appropriately changed as necessary such as product specifications.

10 ... Heating device 12 ... Heating chamber 14 ... Foundation part 16 ... Tent part 18 ... Bottom plate 20 ... Support member 22 ... Tent part frame 22a ... Support 24 ... Cover 62 ... Drawer guide 64 ... Guide mounting part 70 ... Guide mounting part Frame 78,80 ... Guide roller 84 ... Tread plate 100 ... Existing pipe 102 ... Pipe rehabilitation member 120 ... Transport vehicle

Claims (3)

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 housed,
A plurality of guide mounting portions provided at different circumferential positions of the base portion of the heating chamber ,
A drawer guide of the pipe rehabilitation member that is detachably attached to any of the plurality of guide attachment portions , and
A tread plate arranged on the side of the drawer guide is provided.
The tread plate is a heating device for a pipe rehabilitation member that is detachably attached to the frame of the drawer guide or the foundation portion. The heating chamber includes a plurality of columns and a cover supported by the plurality of columns to form a storage space for the pipe rehabilitation member.
Wherein the plurality of guide mounting portion is provided at a position avoiding the plurality of struts, the heating apparatus according to claim 1, wherein the pipe rehabilitation member. The heating device for a pipe rehabilitation member according to claim 2 , wherein the circumferential position of the outlet of the pipe rehabilitation member provided on the cover can be changed according to the circumferential position to which the drawer guide is attached.

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