JP6792261B2 - 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, 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 and restored to a cylindrical shape by applying heating and internal pressure. There is known a method of lining the inner surface of an existing pipe. 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 pipe rehabilitation member is housed, a steam supply unit (steam pipe) for supplying steam to the heating chamber, and the like.
Japanese Unexamined Patent Publication No. 2012-193753

In the technique of Patent Document 1, the method of discharging excess air (steam) in the heating chamber is not particularly mentioned. However, if steam is randomly discharged to the outside of the heating chamber, there is a risk of adversely affecting the surrounding area. For example, steam may hit the surrounding planting and kill the planting, or the surrounding residents who see the steam (water droplets) rising from the heating chamber may be mistaken for a fire or other incident. .. Further, if the amount of exhaust to the outside of the heating chamber is not properly controlled, the pipe rehabilitation member may not be properly heated.

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 tube rehabilitation member capable of appropriately performing exhaust from the heating chamber.

The first invention is a heating device for a pipe rehabilitation member installed at a construction site for rehabilitating an existing pipe and heating and softening the pipe rehabilitation member for rehabilitating the existing pipe before inserting it into the existing pipe. A heating chamber in which the heating chamber is housed, a steam supply unit for supplying steam to the inside of the heating chamber, and an exhaust consolidating pipe having an exhaust inlet at the upper center inside the heating chamber and an exhaust outlet outside the heating chamber. The exhaust consolidating pipe has a flexible pipe portion at least in a part thereof, the heating chamber includes a tent portion, and the exhaust consolidating pipe has an exhaust inlet side inside the tent portion after installing the tent portion at the construction site. It is a heating device for pipe rehabilitation members that is installed in accordance with the surrounding conditions of the construction site by changing and adjusting the opening direction and position of the exhaust outlet by the flexible pipe portion .

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. The heating chamber is provided with a steam supply unit that supplies steam from the steam generator to the heating chamber. Further, an exhaust collecting pipe is provided in the heating chamber. The exhaust consolidating pipe has an exhaust inlet at the upper center inside the heating chamber and an exhaust outlet outside the heating chamber, and exhausts excess air in the heating chamber collectively. Further, the exhaust collecting pipe has a flexible pipe portion formed by a flexible heat-resistant hose or the like at least in a part thereof. Further, the heating chamber includes a tent section. After installing the tent section at the construction site, the exhaust consolidating pipe is inserted into the tent section on the exhaust inlet side, and the opening direction and position of the exhaust outlet are changed and adjusted by the flexible pipe section to change and adjust the vicinity of the construction site. It is installed according to the situation.

According to the first invention, since the excess air in the heating chamber is collectively discharged by using the exhaust consolidating 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 consolidating pipe in the upper center of the heating chamber, exhaust can be uniformly and well-balanced from the entire heating chamber. Therefore, the exhaust from the heating chamber can be appropriately executed, and the pipe rehabilitation member can be appropriately heated. Further, since the exhaust collecting pipe has a flexible pipe portion and the opening direction and position of the exhaust outlet are changed and adjusted by the flexible pipe portion, it is possible to appropriately respond to the surrounding conditions of the construction site.

The second invention is subordinate to the first invention, further comprising a tank connected to the exhaust outlet of the exhaust consolidating pipe and a heater for heating the steam discharged inside the tank, and the tank is discharged from the tank. It is installed in a position where the steam produced does not adversely affect the surrounding area.

In the second invention, the steam discharged from the heating chamber through the exhaust consolidating pipe into the tank is heated by the heater to evaporate again and become transparent. In addition, the tank is installed at a position that does not adversely affect the surroundings, such as preventing the steam discharged from the tank from hitting the implant.

According to the second invention, the steam discharged from the heating chamber can be evaporated again to make it invisible, so that there is no possibility that the surrounding residents will be mistaken for an accident such as a fire. In addition, since the tank is installed at a position where the discharged steam does not adversely affect the surroundings, problems such as death of the planting can be solved.

The third invention is dependent on the first or second invention, and the exhaust consolidating pipe has a lateral pulling pipe portion penetrating the side wall of the heating chamber.

In the third invention, the exhaust collecting pipe has a lateral pulling pipe portion that penetrates the side wall of the heating chamber and extends from the heating chamber to the outside of the heating chamber.

According to the third invention, since the exhaust collecting pipe is laid so as to penetrate the side wall of the heating chamber, the height of the heating device can be reduced and the installation work of the exhaust collecting pipe becomes easy.

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

In the fourth invention, a covering member provided so as to cover the outer surface of the heating chamber 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 fourth invention, the heating conditions of the pipe rehabilitation member in the heating chamber can be made uniform regardless of the external environment.

According to the present invention, since the excess air in the heating chamber is collectively discharged by using the exhaust consolidating 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 consolidating pipe in the upper center of the heating chamber, exhaust can be uniformly and well-balanced from the entire heating chamber. Therefore, the exhaust from the heating chamber can be appropriately executed, and the pipe rehabilitation member can be appropriately heated.

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 the schematic sectional drawing which shows the heating chamber provided in the heating apparatus of FIG. It is a top view which shows the bottom of the heating chamber of FIG. It is a schematic diagram which shows the pipe rehabilitation member wound around the winding drum. It is a top view which shows the heat flow adjustment plate provided in the heating apparatus of FIG. FIG. 5 is an illustrated diagram showing a state in which an existing pipe is rehabilitated using a pipe rehabilitation member heated and softened by the heating device of FIG. It is a schematic diagram which shows the heating device of the pipe rehabilitation member which is another Example of this invention. It is a schematic diagram which shows the heating device of the tube rehabilitation member which is still another Example of this invention.

With reference to FIGS. 1 and 6, the pipe rehabilitation member heating device 10 (hereinafter, simply referred to as “heating device 10”) 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 before inserting it into the existing pipe 100.

First, the pipe rehabilitation member 102 will be briefly described before the specific description of the heating device 10. 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. 4, 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 has a substantially gourd-shaped cross-section having a flat plate-shaped portion 102a and an elliptical tubular portion 102b formed at both ends thereof, and is wound around the winding drum 40. However, the pipe rehabilitation member 102 may be drumlessly wound in 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, in a state where 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 pipe rehabilitation member 102 made of rigid vinyl chloride), it is flattened by using a push plate or a roller. 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 FIGS. 1 to 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 substantially hollow cylindrical shape as a whole. The diameter of the heating chamber 12 is, for example, 2550 mm, and its vertical length (that is, height) is, for example, 1700 mm.

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

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. In this embodiment, the tent portion 16 includes a frame 20 that forms the framework thereof, and a awning sheet 22 that covers the frame 20. The frame 20 is formed by, for example, vertically and horizontally combining hollow pipes made of metal such as iron and SUS. Further, the awning sheet 22 is formed of an elastic material such as heat-resistant rubber, and airtightly covers the ceiling portion and the side portion of the frame 20.

Further, in this embodiment, the covering member 24 is provided so as to cover the outer surface (upper surface and outer surface of the awning sheet 22) of the heating chamber 12. The covering member 24 is made 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 sides of a base material such as a resin sheet with a metal layer such as aluminum foil can be used. In this embodiment, the covering member 24 has a first ceiling cover 24a covering the upper surface of the awning sheet 22, a body-wrapping cover 24b covering the outer surface of the awning sheet 22, and an upper portion of the first ceiling cover 24a and the body-wrapping cover 24b. Includes a second ceiling cover 24c that covers from.

By covering the entire outer surface of the heating chamber 12 with such a covering member 24, 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. Therefore, the heating conditions of the pipe rehabilitation member 102 in the heating chamber 12 can be made uniform or stabilized regardless of the external environment. The term "windproof" as used herein means having a windproof performance, and at least satisfies the JIS A6111: 2004 windproof standard (passing time according to the JIS P8117 Garley testing machine method is 10 seconds or more). Say that it is a thing.

In such a heating chamber 12, a rotary base portion 26 and a rotary shaft portion 28 are provided as a rotation mechanism for rotating the winding drum 40. The turntable portion 26 is formed in a ring plate shape by a metal such as iron and SUS, and is installed on the upper surface of the base portion 14. Gear teeth are formed on the outer peripheral surface of the turntable portion 26, and the transmission gear 30 is connected to the gear teeth of the turntable portion 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 by receiving the rotational driving force from the transmission gear 30, the turntable portion 26 is made rotatable around its axis.

Further, the rotary shaft portion 28 is formed in a straight tubular shape by metal such as iron and SUS, and is erected at the central portion of the rotary base portion 26. The rotation shaft portion 28 rotates together with the turntable portion 26. Further, a pipe rising portion 36 is provided inside the rotating shaft portion 28. The pipe rising portion 36 is formed into a straight tube by metal such as iron and SUS, and is erected on the base portion 14 so as not to rotate integrally with the turntable portion 26 and the rotating shaft portion 28. A rising portion of the first steam pipe 46, which will be described later, is inserted into the inside of the pipe rising portion 36.

Then, a winding drum 40 is installed on the turntable portion 26 so as to surround the outer peripheral surface of the rotary 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 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, 2400 mm. The winding drum 40 and the pipe rehabilitation member 102 rotate with the rotation of the turntable portion 26 and the rotation shaft portion 28.

Returning to FIGS. 1 to 3, a steam supply unit is provided in the heating chamber 12. The steam supply unit supplies steam to the inside of the heating chamber 12, and in this embodiment, includes a first steam pipe 46 and a second steam pipe 48. 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 of the first steam pipe 46 and the second steam pipe 48 via a connecting hose 50, and is heated to a predetermined value. The 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 central portion of the heating chamber 12, passes through the inside of the pipe rising portion 36, and extends upward. 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. Then, the downstream end of the steam hose 56 is connected to the end of the pipe rehabilitation 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, and the like. It is supplied to the inner surface side of the pipe rehabilitation member 102. The steam supplied to the inner surface side of the pipe rehabilitation member 102 is discharged into the heating chamber 12 from the end end side of the pipe rehabilitation member 102 on the winding end side.

Further, the second steam pipe 48 extends laterally in the space below the base portion 14 and rises at the peripheral portion of the turntable portion 26, and is piped in a rectangular shape so as to surround the turntable portion 26. 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 52 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 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 lower space of the base portion 14 in the lateral direction. 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 flexible heat-resistant hose 60. Further, a shutter 64 is provided at the upstream end of the hot air supply unit 58 to open and close the internal passage of the hot air supply unit 58. On the other hand, the downstream end portion (hot air inflow port 66) of the hot air supply portion 58 opens upward in a substantially trapezoidal shape at the peripheral edge portion of the base portion 14. That is, the hot air inflow port 66 for sending hot air into the heating chamber 12 is provided below the accommodation position of the pipe rehabilitation member 102. The hot air from the hot air generator 62 is supplied to the inside of the heating chamber 12 from the hot air inflow port 66 via 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 inflow port 66. The heat flow adjusting plate 80 is a member for adjusting or controlling the flow of hot air sent from the hot air inflow port 66 into the heating chamber 12 so that the hot air is appropriately distributed throughout the heating chamber 12.

Specifically, the heat flow adjusting plate 80 is formed in a ring plate shape by a metal such as iron and SUS, and extends in a substantially horizontal direction so as to extend from the outer surface of the turntable portion 26 to the inner surface of the heating chamber 12. Is provided. A plurality of leg portions 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 inflow port 66 by the leg portions 82. Will be done.

A plurality of circular through holes 84 for communicating the upper surface and the lower surface of the heat flow adjusting plate 80 are formed in a predetermined arrangement mode. The through hole 84 is a portion that serves as a passage for hot air, and the flow of hot air that goes upward can be adjusted depending on the arrangement mode of the through hole 84.

In this embodiment, the opening ratio of the heat flow adjusting plate 80 by the through hole 84 is the flow of hot air of an obstacle (for example, the gear box 90 accommodating the transmission gear 30 and the reinforcing rib 92) existing below the heat flow adjusting plate 80. The upstream side is set smaller than the downstream side in the direction. This is because when there is an obstacle, the hot air hits the obstacle and rises on the front side (upstream side), and it becomes difficult for the hot air to go around to the back side (downstream side) of the obstacle. Further, the through hole 84 is not formed in the portion of the heat flow adjusting plate 80 directly above the hot air inlet 66. This is because the portion directly above the hot air inlet 66 is the position where the hot air is most likely to rise. That is, in this embodiment, for the portion where the hot air easily flows (easily rises), the opening ratio of the heat flow adjusting plate 80 is set to be small or the opening ratio is set to zero so that the hot air can flow into the portion where the hot air is difficult to flow. I try to spread it properly.

Specifically, as can be clearly seen from FIG. 5, the opening ratio of the heat flow adjusting plate 80 in the region A1 on the upstream side in the heat flow direction of the gearbox 90 is the heat flow adjusting plate 80 in the region A2 on the downstream side in the heat flow direction of the gearbox 90. It is set smaller than the aperture ratio of. Further, the opening ratio of the heat flow adjusting plate 80 in the region B1 on the upstream side in the heat flow direction of the reinforcing rib 92 is set smaller than the opening ratio of the heat flow adjusting plate 80 in the region B2 on the downstream side in the heat flow direction of the reinforcing rib 92. Further, since hot air easily wraps around the peripheral edge 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 central 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 inflow port 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 from the hot air inflow port 66 into the heating chamber 12 can be adjusted or controlled, so that the hot air can be appropriately supplied to the entire heating chamber 12. It can be distributed. That is, since the temperature distribution in the heating chamber 12 can be adjusted to be uniform, the entire pipe 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 and the like. is there.

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

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

By providing such an exhaust collecting pipe 70 in the heating chamber 12, the amount of exhaust gas to the outside of the heating chamber 12 and the exhaust direction can be appropriately controlled. That is, since the amount of exhaust gas from the heating chamber 12 can be controlled by the inner diameter and length of the exhaust collecting pipe 70, etc., the inner diameter and length of the exhaust collecting pipe 70 can be appropriately set to be controlled from the heating chamber 12. The displacement of the engine can be controlled appropriately. Further, by arranging the exhaust inlet 72 in the upper center of the heating chamber 12, the entire inside of the heating chamber 12 can be uniformly exhausted in a well-balanced manner. Further, by piping 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 becoming large, and the exhaust collecting pipe 70 with respect to the heating chamber 12 can be reduced or prevented. Installation work is also easy. Furthermore, if steam is randomly discharged from the heating chamber 12, the steam hits the surrounding planting and kills the planting, or the surrounding residents who see the steam (water droplets) rising from the heating chamber 12 are affected by a fire or the like. There is a risk of adverse effects on the surrounding area, such as being mistaken for the occurrence of. On the other hand, such a problem can be solved by collectively discharging the steam in a predetermined direction by using the exhaust consolidating 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 respond to the surrounding conditions of the construction site.

Further, in this embodiment, the tank 76 and the heater 78 are connected to the exhaust outlet 74 of the exhaust consolidating pipe 70. As the tank 76, for example, a drum can can be used. The heater 78 is, for example, a jet heater, which 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 to the tank 76 is heated by the heater 78 to evaporate again and become transparent. As described above, if steam rises from the device, it may be mistaken for the local residents to have an accident such as a fire, but it is discharged from the heating chamber 12 using the tank 76 and the heater 78. Such a problem can be solved by evaporating the steam again to make it invisible.

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 and 6.

When rehabilitating the existing pipe 100, first, the accumulated matter and the like in the rehabilitation section of the existing pipe 100 are removed and washed. Further, a heating device 10 is installed on the shaft 110 side of the starting point, and a winding drum 40 around which the pipe rehabilitation member 102 is wound is housed inside the heating chamber 12. A winch 116 for winding the tow wire 114 is installed on the shaft 112 side at the end point.

Next, 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 turntable portion 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 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 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. Then, the pipe rehabilitation member 102 is heated for a predetermined time in a predetermined atmospheric temperature (for example, 80 to 100 ° C.). At this time, since the exhaust consolidating pipe 70 is provided in the heating chamber 12 in this embodiment, the exhaust amount and the exhaust direction from the heating chamber 12 are appropriately controlled, and the pipe rehabilitation member 102 is appropriately controlled without adversely affecting the surroundings. Can be heated to.

When the pipe rehabilitation member 102 is sufficiently heated and softened, the pipe rehabilitation member 102 is subsequently pulled out from the heating chamber 12 and inserted into the existing pipe 100. At this time, 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 a steam generator 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 repair of the existing pipe 100 using the pipe rehabilitation member 102.

As described above, according to this embodiment, since the excess air in the heating chamber 12 is collectively discharged by using the exhaust consolidating pipe 70, the exhaust amount and the exhaust direction to the outside of the heating chamber 12 can be appropriately controlled. .. Further, by arranging the exhaust inlet 72 in the upper center of the heating chamber 12, the entire inside of the heating chamber 12 can be uniformly exhausted in a well-balanced manner. Therefore, the exhaust from the heating chamber 12 can be appropriately executed, and the pipe rehabilitation member 102 can be appropriately heated.

Further, 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, and it is possible to appropriately respond to the surrounding conditions of the construction site. Further, since the exhaust collecting pipe 70 is provided so as to penetrate the side wall of the heating chamber 12, the height of the heating device 10 can be reduced, and the installation work of the heating device 10 including the work of attaching the exhaust collecting pipe 70 to the heating device 10 can be performed. It will be easy.

In the above-described embodiment, the exhaust collecting pipe 70 is provided with a horizontal pulling pipe portion 70a and a flexible pipe portion 70b, but the present invention is not limited to this, and the specific configuration of the exhaust collecting pipe 70 is appropriately defined. It can be changed.

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

Further, the exhaust collecting pipe 70 does not necessarily have to have the flexible pipe portion 70b. Further, the entire exhaust collecting pipe 70 may be composed of the flexible pipe portion 70b.

Further, as shown in FIG. 9, the exhaust collecting pipe 70 may be provided with a flow path adjusting portion 96 such as a damper or a valve capable of adjusting the flow path cross-sectional area thereof. This makes it possible to more accurately adjust the amount of exhaust air to the outside of the heating chamber 12.

Further, in the above-described embodiment, the hot air supply unit 58 having one hot air inflow port 66 that opens upward is provided, but the present invention is not limited to this, and the specific configuration of the hot air supply unit 58 can be appropriately changed. .. For example, a plurality of hot air inlets 66 may be provided, or the hot air inlets 66 may be opened sideways. Further, it is not always necessary to provide the hot air supply unit 58 in the heating chamber 12.

Further, 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, it may be installed so that the shaft for rotating the pipe rehabilitation member 102 extends in the lateral direction (that is, the winding drum 40 is rotated in the vertical direction).

Furthermore, 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, but the reduced diameter shape and winding shape of the pipe rehabilitation member 102 are different. There is no particular limitation. For example, it may have a reduced diameter shape that is folded by folding, 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.

It should be noted that 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 24 ... Covering member 26 ... Rotating table 28 ... Rotating shaft 40 ... Winding drum 46 ... 1st steam pipe 48 ... 2nd steam pipe 66 ... Hot air inlet 70 ... Exhaust consolidating pipe 70a … Horizontal pull pipe 70b… Flexible pipe 72… Exhaust inlet 74… Exhaust outlet 76… Tank 78… Heater 80… Heat flow adjustment plate 100… Existing pipe 102… Pipe rehabilitation member

Claims (4)

A heating device for a pipe rehabilitation member installed at a construction site for rehabilitating an existing pipe and heating and softening the pipe rehabilitation member for rehabilitating the existing pipe before inserting it into the existing pipe.
A heating chamber in which the pipe rehabilitation member is housed,
It is provided with a steam supply unit that supplies steam to the inside of the heating chamber, and an exhaust consolidation pipe having an exhaust inlet at the upper center inside the heating chamber and an exhaust outlet outside the heating chamber .
The exhaust collecting pipe has a flexible pipe portion at least in a part thereof, and has a flexible pipe portion.
The heating chamber includes a tent section.
After installing the tent portion at the construction site, the exhaust consolidating pipe is inserted into the tent portion on the exhaust inlet side, and the opening direction and position of the exhaust outlet are changed and adjusted by the flexible pipe portion. A heating device for pipe rehabilitation members installed in response to the surrounding conditions of the construction site . A tank connected to the exhaust outlet of the exhaust consolidating pipe, and
Further equipped with a heater for heating the steam discharged inside the tank,
The heating device for a pipe rehabilitation member according to claim 1 , wherein the tank is installed at a position where steam discharged from the tank does not adversely affect the surroundings . The heating device for a pipe rehabilitation member according to claim 1 or 2, wherein the exhaust collecting pipe has a horizontal pulling pipe portion penetrating the side wall of the heating chamber. The heating device for a tube rehabilitation member according to any one of claims 1 to 3 , further comprising a covering member having heat insulating properties, windproof properties, and waterproof properties and provided so as to cover the outer surface of the heating chamber.

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